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./full_match/1/0xDF8704582C08f9A208fF86F42876dCF4308d5435/sources/browser/staking.sol
|
set users token voted for
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usr[msg.sender].voted = tkn;
| 3,101,271
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// pragma solidity >=0.8.0 <0.9.0;
//SPDX-License-Identifier: MIT
import "hardhat/console.sol";
// import "@openzeppelin/contracts/access/Ownable.sol"; //https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
// /$$ /$$
// | $$ /$ | $$
// | $$ /$$$| $$ /$$$$$$ /$$$$$$$
// | $$/$$ $$ $$ /$$__ $$| $$__ $$
// | $$$$_ $$$$| $$$$$$$$| $$ \ $$
// | $$$/ \ $$$| $$_____/| $$ | $$
// | $$/ \ $$| $$$$$$$| $$ | $$
// |__/ \__/ \_______/|__/ |__/
//
//
//
// /$$$$$$$ /$$
// | $$__ $$ |__/
// | $$ \ $$ /$$$$$$ /$$$$$$$ /$$$$$$$ /$$ /$$ /$$ /$$$$$$
// | $$$$$$$/|____ $$ /$$_____//$$_____/| $$| $$ /$$//$$__ $$
// | $$____/ /$$$$$$$| $$$$$$| $$$$$$ | $$ \ $$/$$/| $$$$$$$$
// | $$ /$$__ $$ \____ $$\____ $$| $$ \ $$$/ | $$_____/
// | $$ | $$$$$$$ /$$$$$$$//$$$$$$$/| $$ \ $/ | $$$$$$$
// |__/ \_______/|_______/|_______/ |__/ \_/ \_______/
//
//
//
// /$$$$$$ /$$$$
// |_ $$_/ /$$ $$
// | $$ /$$$$$$$ /$$$$$$$ /$$$$$$ /$$$$$$/$$$$ /$$$$$$|__/\ $$
// | $$ | $$__ $$ /$$_____/ /$$__ $$| $$_ $$_ $$ /$$__ $$ /$$/
// | $$ | $$ \ $$| $$ | $$ \ $$| $$ \ $$ \ $$| $$$$$$$$ /$$/
// | $$ | $$ | $$| $$ | $$ | $$| $$ | $$ | $$| $$_____/ |__/
// /$$$$$$| $$ | $$| $$$$$$$| $$$$$$/| $$ | $$ | $$| $$$$$$$ /$$
// |______/|__/ |__/ \_______/ \______/ |__/ |__/ |__/ \_______/ |__/
//
//
interface ICETH {
function mint() external payable;
function redeem(uint256 redeemTokens) external returns (uint256);
function exchangeRateStored() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
}
struct StakedData {
address user;
uint256 timestamp;
}
struct LoanData {
address user;
uint256 timestamp;
uint256 owed;
}
//@Notice Protocol for adding staking or lending to a NFT collection
contract WenPassiveIncomeProtocol {
event SetErc721Token(address indexed token);
event SetVaultToken(address indexed token);
event Loaned(
uint256 indexed tokenId,
address indexed guy,
uint256 loanAmount
);
event EthReceived(uint256 amount, address indexed guy);
event Staked(uint256 indexed tokenId, address indexed guy);
event Unstaked(uint256 indexed tokenId, address indexed guy);
event RewardsClaimed(
uint256 indexed tokenId,
address indexed guy,
uint256 amount
);
IERC721 public token;
ICETH public vaultToken;
mapping(uint256 => StakedData) public staked; // mapping of tokenId to (user/timestamp)
uint256[] public rewardTimes; //array of times rewards are claimable
uint256[] public rewardAmounts; //array of reward amounts
// bytes32 public rewardAmountsHash;
// bytes32 public rewardTimesHash;1
mapping(uint256 => LoanData) public loaned; // mapping of tokenId to (user/amount/timestamp)
constructor() public payable {
console.log("hi");
// require(rewardsHash == bytes32(""), 'whaat');
}
// @notice Required for any contract that wants to support safeTransfers
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external pure returns (bytes4) {
return this.onERC721Received.selector;
}
function receiveFunds() external payable {
emit EthReceived(msg.value, msg.sender);
}
//notice: Automatically deposits any excess over minimum reserves
receive() external payable {
uint256 minimumReserves = 1e18;
if (address(this).balance > minimumReserves) {
uint256 amountOut = msg.value + address(this).balance - minimumReserves;
deposit(amountOut);
// (bool success, ) = address(vaultToken).call{
// value: amountOut,
// gas: 1000000
// }(abi.encodeWithSignature("mint()"));
// require(success, "Failed to deposit");
}
emit EthReceived(msg.value, msg.sender);
}
//@notice Deposit in vault, receive vault tokens
function deposit(uint256 value) public {
(bool success, ) = address(vaultToken).call{value: value, gas: 1000000}(
abi.encodeWithSignature("mint()")
);
require(success, "Failed to depsit");
}
//@notice ApproveAll required
function stake(uint256 tokenId) external {
require(token.ownerOf(tokenId) == msg.sender, "Not owned");
require(
token.isApprovedForAll(msg.sender, address(this)),
"Not approved"
);
staked[tokenId] = StakedData(msg.sender, block.timestamp);
// stakedCount.increment();
token.safeTransferFrom(msg.sender, address(this), tokenId);
emit Staked(tokenId, msg.sender);
}
//@notice Useful for transferring liquidated NFTs
function transfer(uint256 tokenId, address guy) external {
token.safeTransferFrom(address(this), guy, tokenId);
}
function _unstake(uint256 tokenId) internal {
staked[tokenId] = StakedData(address(0), 0);
token.approve(msg.sender, tokenId);
token.safeTransferFrom(address(this), msg.sender, tokenId);
emit Unstaked(tokenId, msg.sender);
}
//@notice Used to claim rewards and optionally unstake
//@notice If and_unstake==False, update stake timestamp
//@param tokenId Id of token to claim rewards for
//@param and_unstake Set to true if returning NFT to owner
//@dev Explain hash
function claimRewards(uint256 tokenId, bool and_unstake) internal {
require(staked[tokenId].user == msg.sender, "Unauthorized");
// TODO: Include arrays in calldata
uint256[] memory rewardAmounts_ = rewardAmounts; // change to callData later with UI
uint256[] memory rewardTimes_ = rewardTimes;
require(rewardAmounts_.length == rewardTimes_.length);
// require(
// keccak256(abi.encode(rewardAmounts_)) == rewardAmountsHash,
// "Invalid"
// );
// require(
// keccak256(abi.encode(rewardTimes_)) == rewardTimesHash,
// "Invalid"
// );
StakedData memory stakedData = staked[tokenId];
uint256 totalRewards = 0;
for (uint256 idx = 0; idx < rewardTimes_.length; idx++) {
if (rewardTimes_[idx] >= stakedData.timestamp) {
totalRewards += rewardAmounts_[idx];
}
}
if (and_unstake) {
_unstake(tokenId);
} else {
staked[tokenId] = StakedData(msg.sender, block.timestamp);
}
(bool success, ) = msg.sender.call{value: totalRewards}("");
require(success, "Failed transfer");
emit RewardsClaimed(tokenId, msg.sender, totalRewards);
}
//@notice Used by admin to set reward
//@param amount Represents amount of eth PER STAKED ADDRESS
//@dev RewardsAmounts and Times hashes updated
function addReward(uint256 amount) external {
rewardAmounts.push(amount);
rewardTimes.push(block.timestamp);
// rewardAmountsHash = keccak256(abi.encode(rewardAmounts));
// rewardTimesHash = keccak256(abi.encode(rewardTimes));
//emit RewardAdded
}
//@notice Used by admin to set ERC721 token
//@param Address of token
//@dev This should only be set once
//@dev RewardsAmounts and Times hashes updated
function setErc721Token(address token_) external {
require(token_ == address(0), "Already set");
token = IERC721(token_);
emit SetErc721Token(token_);
}
//@notice Used by admin to set Vault contract for use with deposits
//@param Address of vault
//@dev Becareful if changing this, redeem Vault deposits first
function setVaultToken(ICETH token_) external {
vaultToken = token_;
emit SetVaultToken(address(token_));
}
function borrow(uint256 tokenId, uint256 loanAmount) external {
require(token.ownerOf(tokenId) == msg.sender, "Not owned");
require(
token.isApprovedForAll(msg.sender, address(this)),
"Not approved"
);
loaned[tokenId] = LoanData(msg.sender, block.timestamp, loanAmount);
token.safeTransferFrom(msg.sender, address(this), tokenId);
// TODO: Apply interest up front
(bool success, ) = msg.sender.call{value: loanAmount}("");
require(success, "Failed transfer");
emit Loaned(tokenId, msg.sender, loanAmount);
}
function _release(uint256 tokenId) internal {
loaned[tokenId] = LoanData(address(0), 0, 0);
token.approve(msg.sender, tokenId);
token.safeTransferFrom(address(this), msg.sender, tokenId);
// emit event collateralreleased
}
function liquidate(uint256 tokenId) external {
// TODO: Needs access control
// TODO: some check about loan safety
loaned[tokenId] = LoanData(address(0), 0, 0);
// emit event liquidated
}
function repay(uint256 tokenId) external payable {
LoanData memory loanData = loaned[tokenId];
require(loanData.user == msg.sender, "Unauthorized");
require(msg.value <= loanData.owed, "overpayment");
if (msg.value == loanData.owed) {
_release(tokenId);
} else {
loaned[tokenId].owed = loanData.owed - msg.value;
}
// emit Repaid(tokenId, amount);
}
}
|
mapping of tokenId to (user/timestamp)
|
mapping(uint256 => StakedData) public staked;
| 5,534,742
|
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./full_match/43114/0x9727D535165e19590013bdDea8Fd85dd618b9aF7/sources/contracts/rewards/VestingStakingRewards.sol
|
Added to support recovering LP Rewards from other systems such as BAL to be distributed to holders
|
function recoverERC20(address tokenAddress, uint256 tokenAmount)
external
onlyOwnerExec
nonReentrant
{
require(
tokenAddress != address(stakingToken),
"Cannot withdraw the staking token"
);
IERC20(tokenAddress).safeTransfer(owner(), tokenAmount);
emit Recovered(tokenAddress, tokenAmount);
}
| 4,628,627
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./full_match/4/0x0274e3DBbbE2Bc6f0e6F64e0b0406c34701639B1/sources/contracts/fuckup.sol
|
Edit reserved whitelist spots
|
function editWhitelistReserved(address[] memory _a, uint256[] memory _amount) public onlyOwner {
for(uint256 i; i < _a.length; i++){
whitelistReserved[_a[i]] = _amount[i];
}
}
| 788,557
|
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pragma solidity ^0.4.15;
interface TokenInterface {
function mint(address _to, uint256 _amount) public returns (bool);
function finishMinting() public returns (bool);
function totalSupply() public constant returns (uint);
function balanceOf(address _address) public constant returns (uint);
function burn(address burner);
function hold(address addr, uint duration) external;
function transfer(address _to, uint _amount) external;
function contributeTo(address _to, uint256 _amount) public;
}
interface VotingFactoryInterface {
function createRegular(address _creator, string _name, string _description, uint _duration, bytes32[] _options) external returns (address);
function createWithdrawal(address _creator, string _name, string _description, uint _duration, uint _sum, address withdrawalWallet, bool _dxc) external returns (address);
function createRefund(address _creator, string _name, string _description, uint _duration) external returns (address);
function createModule(address _creator, string _name, string _description, uint _duration, uint _module, address _newAddress) external returns (address);
function setDaoFactory(address _dao) external;
}
library DAOLib {
event VotingCreated(
address voting,
string votingType,
address dao,
string name,
string description,
uint duration,
address sender
);
/*
* @dev Receives parameters from crowdsale module in case of successful crowdsale and processes them
* @param token Instance of token contract
* @param commissionRaised Amount of funds which were sent via commission contract
* @param serviceContract Address of contract which receives commission
* @param teamBonuses Array of percents which indicates the number of token for every team member
* @param team Array of team members' addresses
* @param teamHold Array of timestamp until which the tokens will be held for every team member
* @return uint Amount of tokens minted for team
*/
function handleFinishedCrowdsale(TokenInterface token, uint commissionRaised, address serviceContract, uint[] teamBonuses, address[] team, uint[] teamHold) returns (uint) {
uint commission = (commissionRaised / 100) * 4;
serviceContract.call.gas(200000).value(commission)();
uint totalSupply = token.totalSupply() / 100;
uint teamTokensAmount = 0;
for (uint i = 0; i < team.length; i++) {
uint teamMemberTokensAmount = SafeMath.mul(totalSupply, teamBonuses[i]);
teamTokensAmount += teamMemberTokensAmount;
token.mint(team[i], teamMemberTokensAmount);
token.hold(team[i], teamHold[i]);
}
return teamTokensAmount;
}
function delegatedCreateRegular(VotingFactoryInterface _votingFactory, string _name, string _description, uint _duration, bytes32[] _options, address _dao) returns (address) {
address _votingAddress = _votingFactory.createRegular(msg.sender, _name, _description, _duration, _options);
VotingCreated(_votingAddress, "Regular", _dao, _name, _description, _duration, msg.sender);
return _votingAddress;
}
function delegatedCreateWithdrawal(VotingFactoryInterface _votingFactory, string _name, string _description, uint _duration, uint _sum, address withdrawalWallet, bool _dxc, address _dao)
returns (address)
{
address _votingAddress = _votingFactory.createWithdrawal(msg.sender, _name, _description, _duration, _sum, withdrawalWallet, _dxc);
VotingCreated(_votingAddress, "Withdrawal", _dao, _name, _description, _duration, msg.sender);
return _votingAddress;
}
function delegatedCreateRefund(VotingFactoryInterface _votingFactory, string _name, string _description, uint _duration, address _dao) returns (address) {
address _votingAddress = _votingFactory.createRefund(msg.sender, _name, _description, _duration);
VotingCreated(_votingAddress, "Refund", _dao, _name, _description, _duration, msg.sender);
return _votingAddress;
}
function delegatedCreateModule(VotingFactoryInterface _votingFactory, string _name, string _description, uint _duration, uint _module, address _newAddress, address _dao) returns (address) {
address _votingAddress = _votingFactory.createModule(msg.sender, _name, _description, _duration, _module, _newAddress);
VotingCreated(_votingAddress, "Module", _dao, _name, _description, _duration, msg.sender);
return _votingAddress;
}
/*
* @dev Counts the number of tokens that should be minted according to amount of sent funds and current rate
* @param value Amount of sent funds
* @param bonusPeriods Array of timestamps indicating bonus periods
* @param bonusRates Array of rates for every bonus period
* @param rate Default rate
* @return uint Amount of tokens that should be minted
*/
function countTokens(uint value, uint[] bonusPeriods, uint[] bonusRates, uint rate) constant returns (uint) {
if (bonusRates.length == 0) return value * rate; // DXC bonus rates could be empty
for (uint i = 0; i < bonusPeriods.length; i++) {
if (now < bonusPeriods[i]) {
rate = bonusRates[i];
break;
}
}
uint tokensAmount = SafeMath.mul(value, rate);
return tokensAmount;
}
/*
* @dev Counts the amount of funds that must be returned to participant
* @param tokensAmount Amount of tokens on participant's balance
* @param etherRate Rate for ether during the crowdsale
* @param newRate Current rate according to left funds and total supply of tokens
* @param multiplier Multiplier that was used in previous calculations to avoid issues with float numbers
* @return uint Amount of funds that must be returned to participant
*/
function countRefundSum(uint tokensAmount, uint etherRate, uint newRate, uint multiplier) constant returns (uint) {
uint fromPercentDivider = 100;
return (tokensAmount / fromPercentDivider * newRate) / (multiplier * etherRate);
}
}
contract CrowdsaleDAOFields {
uint public etherRate;
uint public DXCRate;
uint public softCap;
uint public hardCap;
uint public startTime;
uint public endTime;
bool public canInitCrowdsaleParameters = true;
bool public canInitStateParameters = true;
bool public canInitBonuses = true;
bool public canSetWhiteList = true;
uint public commissionRaised = 0; // Funds which were provided via commission contract
uint public weiRaised = 0;
uint public DXCRaised = 0;
uint public fundsRaised = 0;
mapping(address => uint) public depositedWei; // Used for refund in case of not reached soft cap
mapping(address => uint) public depositedDXC; // Used for refund in case of not reached soft cap
bool public crowdsaleFinished;
bool public refundableSoftCap = false;
uint public newEtherRate = 0; // Used for refund after accept of Refund proposal
uint public newDXCRate = 0; // Used for refund after accept of Refund proposal
address public serviceContract; //Contract which gets commission funds if soft cap was reached during the crowdsale
uint[] public teamBonusesArr;
address[] public team;
mapping(address => bool) public teamMap;
uint[] public teamHold;
bool[] public teamServiceMember;
TokenInterface public token;
VotingFactoryInterface public votingFactory;
address public commissionContract; //Contract that is used to mark funds which were provided through daox.org platform
string public name;
string public description;
uint public created_at = now; // UNIX time
mapping(address => bool) public votings;
bool public refundable = false;
uint public lastWithdrawalTimestamp = 0;
address[] public whiteListArr;
mapping(address => bool) public whiteList;
mapping(address => uint) public teamBonuses;
uint[] public bonusPeriods;
uint[] public bonusEtherRates;
uint[] public bonusDXCRates;
uint public teamTokensAmount;
uint constant internal withdrawalPeriod = 120 * 24 * 60 * 60;
TokenInterface public DXC;
uint public tokensMintedByEther;
uint public tokensMintedByDXC;
bool public dxcPayments; //Flag indicating whether it is possible to invest via DXC token or not
uint internal constant multiplier = 100000;
uint internal constant percentMultiplier = 100;
}
contract Owned {
address public owner;
function Owned(address _owner) {
owner = _owner;
}
function transferOwnership(address newOwner) onlyOwner(msg.sender) {
owner = newOwner;
}
modifier onlyOwner(address _sender) {
require(_sender == owner);
_;
}
}
interface IDAOPayable {
function handleCommissionPayment(address _sender) payable;
}
contract Commission {
IDAOPayable dao;
function Commission(address _dao) {
dao = IDAOPayable(_dao);
}
function() payable {
dao.handleCommissionPayment.value(msg.value)(msg.sender);
}
}
contract State is CrowdsaleDAOFields {
address public owner;
event State(address _comission);
/*
* @dev Sets addresses of token which will be minted during the crowdsale and address of DXC token contract so that
* DAO will be able to handle investments via DXC. Also function creates instance of Commission contract for this DAO
* @param value Amount of sent funds
*/
function initState(address _tokenAddress, address _DXC)
external
onlyOwner(msg.sender)
canInit
crowdsaleNotStarted
{
require(_tokenAddress != 0x0 && _DXC != 0x0);
token = TokenInterface(_tokenAddress);
DXC = TokenInterface(_DXC);
created_at = block.timestamp;
commissionContract = new Commission(this);
canInitStateParameters = false;
State(commissionContract);
}
modifier canInit() {
require(canInitStateParameters);
_;
}
modifier crowdsaleNotStarted() {
require(startTime == 0 || block.timestamp < startTime);
_;
}
modifier onlyOwner(address _sender) {
require(_sender == owner);
_;
}
}
contract Crowdsale is CrowdsaleDAOFields {
address public owner;
/*
* @dev Receives info about ether payment from CrowdsaleDAO contract then mints tokens for sender and saves info about
* sent funds to either return it in case of refund or get commission from them in case of successful crowdsale
* @param _sender Address of sender
* @param _commission Boolean indicating whether it is needed to take commission from sent funds or not
*/
function handlePayment(address _sender, bool _commission) external payable CrowdsaleIsOngoing validEtherPurchase(msg.value) {
require(_sender != 0x0);
uint weiAmount = msg.value;
if (_commission) {
commissionRaised = commissionRaised + weiAmount;
}
weiRaised += weiAmount;
depositedWei[_sender] += weiAmount;
uint tokensAmount = DAOLib.countTokens(weiAmount, bonusPeriods, bonusEtherRates, etherRate);
tokensMintedByEther = SafeMath.add(tokensMintedByEther, tokensAmount);
token.mint(_sender, tokensAmount);
}
/*
* @dev Receives info about DXC payment from CrowdsaleDAO contract then mints tokens for sender and saves info about
* sent funds to return it in case of refund
* @param _from Address of sender
* @param _dxcAmount Amount of DXC token which were sent to DAO
*/
function handleDXCPayment(address _from, uint _dxcAmount) external CrowdsaleIsOngoing validDXCPurchase(_dxcAmount) onlyDXC {
DXCRaised += _dxcAmount;
depositedDXC[_from] += _dxcAmount;
uint tokensAmount = DAOLib.countTokens(_dxcAmount, bonusPeriods, bonusDXCRates, DXCRate);
tokensMintedByDXC = SafeMath.add(tokensMintedByDXC, tokensAmount);
token.mint(_from, tokensAmount);
}
/*
* @dev Sets main parameters for upcoming crowdsale
* @param _softCap The minimal amount of funds that must be collected by DAO for crowdsale to be considered successful
* @param _hardCap The maximal amount of funds that can be raised during the crowdsale
* @param _etherRate Amount of tokens that will be minted per one ether
* @param _DXCRate Amount of tokens that will be minted per one DXC
* @param _startTime Unix timestamp that indicates the moment when crowdsale will start
* @param _endTime Unix timestamp which indicates the moment when crowdsale will end
* @param _dxcPayments Boolean indicating whether it is possible to invest via DXC token or not
*/
function initCrowdsaleParameters(uint _softCap, uint _hardCap, uint _etherRate, uint _DXCRate, uint _startTime, uint _endTime, bool _dxcPayments)
external
onlyOwner(msg.sender)
canInit
{
require(_softCap != 0 && _hardCap != 0 && _etherRate != 0 && _DXCRate != 0 && _startTime != 0 && _endTime != 0);
require(_softCap < _hardCap && _startTime > block.timestamp);
softCap = _softCap * 1 ether;
hardCap = _hardCap * 1 ether;
(startTime, endTime) = (_startTime, _endTime);
(dxcPayments, etherRate, DXCRate) = (_dxcPayments, _etherRate, _DXCRate);
canInitCrowdsaleParameters = false;
}
/*
* @dev Finishes the crowdsale and analyzes whether it is successful or not. If it is not then DAO goes to refundableSoftCap
* state otherwise it counts and mints tokens for team members and holds them for certain period of time according to
* parameters which were set for every member via initBonuses function. In addition function sends commission to service contract
*/
function finish() external {
fundsRaised = DXCRate != 0 ? weiRaised + (DXC.balanceOf(this)) / (etherRate / DXCRate) : weiRaised;
require((block.timestamp >= endTime || fundsRaised == hardCap) && !crowdsaleFinished);
crowdsaleFinished = true;
if (fundsRaised >= softCap) {
teamTokensAmount = DAOLib.handleFinishedCrowdsale(token, commissionRaised, serviceContract, teamBonusesArr, team, teamHold);
} else {
refundableSoftCap = true;
}
token.finishMinting();
}
modifier canInit() {
require(canInitCrowdsaleParameters);
_;
}
modifier onlyCommission() {
require(commissionContract == msg.sender);
_;
}
modifier CrowdsaleIsOngoing() {
require(block.timestamp >= startTime && block.timestamp < endTime && !crowdsaleFinished);
_;
}
modifier validEtherPurchase(uint value) {
require(DXCRate != 0 ?
hardCap - DXCRaised / (etherRate / DXCRate) >= weiRaised + value :
hardCap >= weiRaised + value);
_;
}
modifier validDXCPurchase(uint value) {
require(dxcPayments && (hardCap - weiRaised >= (value + DXCRaised) / (etherRate / DXCRate)));
_;
}
modifier onlyDXC() {
require(msg.sender == address(DXC));
_;
}
modifier onlyOwner(address _sender) {
require(_sender == owner);
_;
}
}
contract Payment is CrowdsaleDAOFields {
/*
* @dev Returns funds to participant according to amount of funds that left in DAO and amount of tokens for this participant
*/
function refund() whenRefundable notTeamMember {
uint tokensMintedSum = SafeMath.add(tokensMintedByEther, tokensMintedByDXC);
uint etherPerDXCRate = SafeMath.mul(tokensMintedByEther, percentMultiplier) / tokensMintedSum;
uint dxcPerEtherRate = SafeMath.mul(tokensMintedByDXC, percentMultiplier) / tokensMintedSum;
uint tokensAmount = token.balanceOf(msg.sender);
token.burn(msg.sender);
if (etherPerDXCRate != 0)
msg.sender.transfer(DAOLib.countRefundSum(etherPerDXCRate * tokensAmount, etherRate, newEtherRate, multiplier));
if (dxcPerEtherRate != 0)
DXC.transfer(msg.sender, DAOLib.countRefundSum(dxcPerEtherRate * tokensAmount, DXCRate, newDXCRate, multiplier));
}
/*
* @dev Returns funds which were sent to crowdsale contract back to backer and burns tokens that were minted for him
*/
function refundSoftCap() whenRefundableSoftCap {
require(depositedWei[msg.sender] != 0 || depositedDXC[msg.sender] != 0);
token.burn(msg.sender);
uint weiAmount = depositedWei[msg.sender];
uint tokensAmount = depositedDXC[msg.sender];
delete depositedWei[msg.sender];
delete depositedDXC[msg.sender];
DXC.transfer(msg.sender, tokensAmount);
msg.sender.transfer(weiAmount);
}
modifier whenRefundable() {
require(refundable);
_;
}
modifier whenRefundableSoftCap() {
require(refundableSoftCap);
_;
}
modifier onlyParticipant {
require(token.balanceOf(msg.sender) > 0);
_;
}
modifier notTeamMember() {
require(!teamMap[msg.sender]);
_;
}
}
contract VotingDecisions is CrowdsaleDAOFields {
/*
* @dev Transfers withdrawal sum in ether or DXC tokens to the whitelisted address. Calls from Withdrawal proposal
* @param _address Whitelisted address
* @param _withdrawalSum Amount of ether/DXC to be sent
* @param _dxc Should withdrawal be in DXC tokens
*/
function withdrawal(address _address, uint _withdrawalSum, bool _dxc) notInRefundableState onlyVoting external {
lastWithdrawalTimestamp = block.timestamp;
_dxc ? DXC.transfer(_address, _withdrawalSum) : _address.transfer(_withdrawalSum);
}
/*
* @dev Change DAO's mode to `refundable`. Can be called by any tokenholder
*/
function makeRefundableByUser() external {
require(lastWithdrawalTimestamp == 0 && block.timestamp >= created_at + withdrawalPeriod
|| lastWithdrawalTimestamp != 0 && block.timestamp >= lastWithdrawalTimestamp + withdrawalPeriod);
makeRefundable();
}
/*
* @dev Change DAO's mode to `refundable`. Calls from Refund proposal
*/
function makeRefundableByVotingDecision() external onlyVoting {
makeRefundable();
}
/*
* @dev Change DAO's mode to `refundable`. Calls from this contract `makeRefundableByUser` or `makeRefundableByVotingDecision` functions
*/
function makeRefundable() notInRefundableState private {
refundable = true;
newEtherRate = SafeMath.mul(this.balance * etherRate, multiplier) / tokensMintedByEther;
newDXCRate = tokensMintedByDXC != 0 ? SafeMath.mul(DXC.balanceOf(this) * DXCRate, multiplier) / tokensMintedByDXC : 0;
}
/*
* @dev Make tokens of passed address non-transferable for passed period
* @param _address Address of tokenholder
* @param _duration Hold's duration in seconds
*/
function holdTokens(address _address, uint _duration) onlyVoting external {
token.hold(_address, _duration);
}
/*
* @dev Throws if called not by any voting contract
*/
modifier onlyVoting() {
require(votings[msg.sender]);
_;
}
/*
* @dev Throws if DAO is in refundable state
*/
modifier notInRefundableState {
require(!refundable && !refundableSoftCap);
_;
}
}
interface DAOFactoryInterface {
function exists(address _address) external constant returns (bool);
}
library DAODeployer {
function deployCrowdsaleDAO(string _name, string _description, address _serviceContractAddress, address _votingFactoryContractAddress) returns(CrowdsaleDAO dao) {
dao = new CrowdsaleDAO(_name, _description, _serviceContractAddress, _votingFactoryContractAddress);
}
function transferOwnership(address _dao, address _newOwner) {
CrowdsaleDAO(_dao).transferOwnership(_newOwner);
}
}
library DAOProxy {
function delegatedInitState(address stateModule, address _tokenAddress, address _DXC) {
require(stateModule.delegatecall(bytes4(keccak256("initState(address,address)")), _tokenAddress, _DXC));
}
function delegatedHoldState(address stateModule, uint _tokenHoldTime) {
require(stateModule.delegatecall(bytes4(keccak256("initHold(uint256)")), _tokenHoldTime));
}
function delegatedGetCommissionTokens(address paymentModule) {
require(paymentModule.delegatecall(bytes4(keccak256("getCommissionTokens()"))));
}
function delegatedRefund(address paymentModule) {
require(paymentModule.delegatecall(bytes4(keccak256("refund()"))));
}
function delegatedRefundSoftCap(address paymentModule) {
require(paymentModule.delegatecall(bytes4(keccak256("refundSoftCap()"))));
}
function delegatedWithdrawal(address votingDecisionModule, address _address, uint withdrawalSum, bool dxc) {
require(votingDecisionModule.delegatecall(bytes4(keccak256("withdrawal(address,uint256,bool)")), _address, withdrawalSum, dxc));
}
function delegatedMakeRefundableByUser(address votingDecisionModule) {
require(votingDecisionModule.delegatecall(bytes4(keccak256("makeRefundableByUser()"))));
}
function delegatedMakeRefundableByVotingDecision(address votingDecisionModule) {
require(votingDecisionModule.delegatecall(bytes4(keccak256("makeRefundableByVotingDecision()"))));
}
function delegatedHoldTokens(address votingDecisionModule, address _address, uint duration) {
require(votingDecisionModule.delegatecall(bytes4(keccak256("holdTokens(address,uint256)")), _address, duration));
}
function delegatedInitCrowdsaleParameters(
address crowdsaleModule,
uint _softCap,
uint _hardCap,
uint _etherRate,
uint _DXCRate,
uint _startTime,
uint _endTime,
bool _dxcPayments
) {
require(crowdsaleModule.delegatecall(bytes4(keccak256("initCrowdsaleParameters(uint256,uint256,uint256,uint256,uint256,uint256,bool)"))
, _softCap, _hardCap, _etherRate, _DXCRate, _startTime, _endTime, _dxcPayments));
}
function delegatedFinish(address crowdsaleModule) {
require(crowdsaleModule.delegatecall(bytes4(keccak256("finish()"))));
}
function delegatedHandlePayment(address crowdsaleModule, address _sender, bool _commission) {
require(crowdsaleModule.delegatecall(bytes4(keccak256("handlePayment(address,bool)")), _sender, _commission));
}
function delegatedHandleDXCPayment(address crowdsaleModule, address _from, uint _amount) {
require(crowdsaleModule.delegatecall(bytes4(keccak256("handleDXCPayment(address,uint256)")), _from, _amount));
}
}
library Common {
function stringToBytes32(string memory source) constant returns (bytes32 result) {
assembly {
result := mload(add(source, 32))
}
}
function percent(uint numerator, uint denominator, uint precision) constant returns(uint quotient) {
uint _numerator = numerator * 10 ** (precision+1);
quotient = ((_numerator / denominator) + 5) / 10;
}
function toString(bytes32 _bytes) internal constant returns(string) {
bytes memory arrayTemp = new bytes(32);
uint currentLength = 0;
for (uint i = 0; i < 32; i++) {
arrayTemp[i] = _bytes[i];
if (arrayTemp[i] != 0) currentLength+=1;
}
bytes memory arrayRes = new bytes(currentLength);
for (i = 0; i < currentLength; i++) {
arrayRes[i] = arrayTemp[i];
}
return string(arrayRes);
}
}
contract CrowdsaleDAO is CrowdsaleDAOFields, Owned {
address public stateModule;
address public paymentModule;
address public votingDecisionModule;
address public crowdsaleModule;
function CrowdsaleDAO(string _name, string _description, address _serviceContractAddress, address _votingFactoryContractAddress)
Owned(msg.sender) {
(name, description, serviceContract, votingFactory) = (_name, _description, _serviceContractAddress, VotingFactoryInterface(_votingFactoryContractAddress));
}
/*
* @dev Receives ether and forwards to the crowdsale module via a delegatecall with commission flag equal to false
*/
function() payable {
DAOProxy.delegatedHandlePayment(crowdsaleModule, msg.sender, false);
}
/*
* @dev Receives ether from commission contract and forwards to the crowdsale module
* via a delegatecall with commission flag equal to true
* @param _sender Address which sent ether to commission contract
*/
function handleCommissionPayment(address _sender) payable {
DAOProxy.delegatedHandlePayment(crowdsaleModule, _sender, true);
}
/*
* @dev Receives info about address which sent DXC tokens to current contract and about amount of sent tokens from
* DXC token contract and then forwards this data to the crowdsale module
* @param _from Address which sent DXC tokens
* @param _amount Amount of tokens which were sent
*/
function handleDXCPayment(address _from, uint _amount) {
DAOProxy.delegatedHandleDXCPayment(crowdsaleModule, _from, _amount);
}
/*
* @dev Receives decision from withdrawal voting and forwards it to the voting decisions module
* @param _address Address for withdrawal
* @param _withdrawalSum Amount of ether/DXC tokens which must be sent to withdrawal address
* @param _dxc boolean indicating whether withdrawal should be made through DXC tokens or not
*/
function withdrawal(address _address, uint _withdrawalSum, bool _dxc) external {
DAOProxy.delegatedWithdrawal(votingDecisionModule, _address, _withdrawalSum, _dxc);
}
/*
* @dev Receives decision from refund voting and forwards it to the voting decisions module
*/
function makeRefundableByVotingDecision() external {
DAOProxy.delegatedMakeRefundableByVotingDecision(votingDecisionModule);
}
/*
* @dev Called by voting contract to hold tokens of voted address.
* It is needed to prevent multiple votes with same tokens
* @param _address Voted address
* @param _duration Amount of time left for voting to be finished
*/
function holdTokens(address _address, uint _duration) external {
DAOProxy.delegatedHoldTokens(votingDecisionModule, _address, _duration);
}
function setStateModule(address _stateModule) external canSetAddress(stateModule) {
stateModule = _stateModule;
}
function setPaymentModule(address _paymentModule) external canSetAddress(paymentModule) {
paymentModule = _paymentModule;
}
function setVotingDecisionModule(address _votingDecisionModule) external canSetAddress(votingDecisionModule) {
votingDecisionModule = _votingDecisionModule;
}
function setCrowdsaleModule(address _crowdsaleModule) external canSetAddress(crowdsaleModule) {
crowdsaleModule = _crowdsaleModule;
}
function setVotingFactoryAddress(address _votingFactory) external canSetAddress(votingFactory) {
votingFactory = VotingFactoryInterface(_votingFactory);
}
/*
* @dev Checks if provided address has tokens of current DAO
* @param _participantAddress Address of potential participant
* @return boolean indicating if the address has at least one token
*/
function isParticipant(address _participantAddress) external constant returns (bool) {
return token.balanceOf(_participantAddress) > 0;
}
/*
* @dev Function which is used to set address of token which will be distributed by DAO during the crowdsale and
* address of DXC token contract to use it for handling payment operations with DXC. Delegates call to state module
* @param _tokenAddress Address of token which will be distributed during the crowdsale
* @param _DXC Address of DXC contract
*/
function initState(address _tokenAddress, address _DXC) public {
DAOProxy.delegatedInitState(stateModule, _tokenAddress, _DXC);
}
/*
* @dev Delegates parameters which describe conditions of crowdsale to the crowdsale module.
* @param _softCap The minimal amount of funds that must be collected by DAO for crowdsale to be considered successful
* @param _hardCap The maximal amount of funds that can be raised during the crowdsale
* @param _etherRate Amount of tokens that will be minted per one ether
* @param _DXCRate Amount of tokens that will be minted per one DXC
* @param _startTime Unix timestamp that indicates the moment when crowdsale will start
* @param _endTime Unix timestamp that indicates the moment when crowdsale will end
* @param _dxcPayments Boolean indicating whether it is possible to invest via DXC token or not
*/
function initCrowdsaleParameters(uint _softCap, uint _hardCap, uint _etherRate, uint _DXCRate, uint _startTime, uint _endTime, bool _dxcPayments) public {
DAOProxy.delegatedInitCrowdsaleParameters(crowdsaleModule, _softCap, _hardCap, _etherRate, _DXCRate, _startTime, _endTime, _dxcPayments);
}
/*
* @dev Delegates request of creating "regular" voting and saves the address of created voting contract to votings list
* @param _name Name for voting
* @param _description Description for voting that will be created
* @param _duration Time in seconds from current moment until voting will be finished
* @param _options List of options
*/
function addRegular(string _name, string _description, uint _duration, bytes32[] _options) public {
votings[DAOLib.delegatedCreateRegular(votingFactory, _name, _description, _duration, _options, this)] = true;
}
/*
* @dev Delegates request of creating "withdrawal" voting and saves the address of created voting contract to votings list
* @param _name Name for voting
* @param _description Description for voting that will be created
* @param _duration Time in seconds from current moment until voting will be finished
* @param _sum Amount of funds that is supposed to be withdrawn
* @param _withdrawalWallet Address for withdrawal
* @param _dxc Boolean indicating whether withdrawal must be in DXC tokens or in ether
*/
function addWithdrawal(string _name, string _description, uint _duration, uint _sum, address _withdrawalWallet, bool _dxc) public {
votings[DAOLib.delegatedCreateWithdrawal(votingFactory, _name, _description, _duration, _sum, _withdrawalWallet, _dxc, this)] = true;
}
/*
* @dev Delegates request of creating "refund" voting and saves the address of created voting contract to votings list
* @param _name Name for voting
* @param _description Description for voting that will be created
* @param _duration Time in seconds from current moment until voting will be finished
*/
function addRefund(string _name, string _description, uint _duration) public {
votings[DAOLib.delegatedCreateRefund(votingFactory, _name, _description, _duration, this)] = true;
}
/*
* @dev Delegates request of creating "module" voting and saves the address of created voting contract to votings list
* @param _name Name for voting
* @param _description Description for voting that will be created
* @param _duration Time in seconds from current moment until voting will be finished
* @param _module Number of module which must be replaced
* @param _newAddress Address of new module
*/
function addModule(string _name, string _description, uint _duration, uint _module, address _newAddress) public {
votings[DAOLib.delegatedCreateModule(votingFactory, _name, _description, _duration, _module, _newAddress, this)] = true;
}
/*
* @dev Delegates request for going into refundable state to voting decisions module
*/
function makeRefundableByUser() public {
DAOProxy.delegatedMakeRefundableByUser(votingDecisionModule);
}
/*
* @dev Delegates request for refund to payment module
*/
function refund() public {
DAOProxy.delegatedRefund(paymentModule);
}
/*
* @dev Delegates request for refund of soft cap to payment module
*/
function refundSoftCap() public {
DAOProxy.delegatedRefundSoftCap(paymentModule);
}
/*
* @dev Delegates request for finish of crowdsale to crowdsale module
*/
function finish() public {
DAOProxy.delegatedFinish(crowdsaleModule);
}
/*
* @dev Sets team addresses and bonuses for crowdsale
* @param _team The addresses that will be defined as team members
* @param _tokenPercents Array of bonuses in percents which will go te every member in case of successful crowdsale
* @param _bonusPeriods Array of timestamps which show when tokens will be minted with higher rate
* @param _bonusEtherRates Array of ether rates for every bonus period
* @param _bonusDXCRates Array of DXC rates for every bonus period
* @param _teamHold Array of timestamps which show the hold duration of tokens for every team member
* @param service Array of booleans which show whether member is a service address or not
*/
function initBonuses(address[] _team, uint[] _tokenPercents, uint[] _bonusPeriods, uint[] _bonusEtherRates, uint[] _bonusDXCRates, uint[] _teamHold, bool[] _service) public onlyOwner(msg.sender) {
require(
_team.length == _tokenPercents.length &&
_team.length == _teamHold.length &&
_team.length == _service.length &&
_bonusPeriods.length == _bonusEtherRates.length &&
(_bonusDXCRates.length == 0 || _bonusPeriods.length == _bonusDXCRates.length) &&
canInitBonuses &&
(block.timestamp < startTime || canInitCrowdsaleParameters)
);
team = _team;
teamHold = _teamHold;
teamBonusesArr = _tokenPercents;
teamServiceMember = _service;
for(uint i = 0; i < _team.length; i++) {
teamMap[_team[i]] = true;
teamBonuses[_team[i]] = _tokenPercents[i];
}
bonusPeriods = _bonusPeriods;
bonusEtherRates = _bonusEtherRates;
bonusDXCRates = _bonusDXCRates;
canInitBonuses = false;
}
/*
* @dev Sets addresses which can be used to get funds via withdrawal votings
* @param _addresses Array of addresses which will be used for withdrawals
*/
function setWhiteList(address[] _addresses) public onlyOwner(msg.sender) {
require(canSetWhiteList);
whiteListArr = _addresses;
for(uint i = 0; i < _addresses.length; i++) {
whiteList[_addresses[i]] = true;
}
canSetWhiteList = false;
}
/*
Modifiers
*/
modifier canSetAddress(address module) {
require(votings[msg.sender] || (module == 0x0 && msg.sender == owner));
_;
}
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
library VotingLib {
struct Option {
uint votes;
bytes32 description;
}
function delegatecallCreate(address _v, address _dao, string _name, string _description, uint _duration, uint _quorum) {
require(_v.delegatecall(bytes4(keccak256("create(address,bytes32,bytes32,uint256,uint256)")),
_dao,
Common.stringToBytes32(_name),
Common.stringToBytes32(_description),
_duration,
_quorum)
);
}
function delegatecallAddVote(address _v, uint optionID) {
require(_v.delegatecall(bytes4(keccak256("addVote(uint256)")), optionID));
}
function delegatecallFinish(address _v) {
require(_v.delegatecall(bytes4(keccak256("finish()"))));
}
function isValidWithdrawal(address _dao, uint _sum, bool _dxc) constant returns(bool) {
return !_dxc ? _dao.balance >= _sum : ICrowdsaleDAO(_dao).DXC().balanceOf(_dao) >= _sum;
}
}
contract IDAO {
function isParticipant(address _participantAddress) external constant returns (bool);
function teamMap(address _address) external constant returns (bool);
function whiteList(address _address) constant returns (bool);
}
contract ICrowdsaleDAO is IDAO {
bool public crowdsaleFinished;
uint public teamTokensAmount;
uint public endTime;
uint public weiRaised;
uint public softCap;
uint public fundsRaised;
function addRegular(string _description, uint _duration, bytes32[] _options) external;
function addWithdrawal(string _description, uint _duration, uint _sum) external;
function addRefund(string _description, uint _duration) external;
function addModule(string _description, uint _duration, uint _module, address _newAddress) external;
function holdTokens(address _address, uint duration) external;
function makeRefundableByVotingDecision();
function withdrawal(address _address, uint withdrawalSum, bool dxc);
function setStateModule(address _stateModule);
function setPaymentModule(address _paymentModule);
function setVotingDecisionModule(address _votingDecisionModule);
function setCrowdsaleModule(address _crowdsaleModule);
function setVotingFactoryAddress(address _votingFactory);
function teamBonuses(address _address) constant returns (uint);
function token() constant returns (TokenInterface);
function DXC() constant returns(TokenInterface);
}
contract VotingFields {
ICrowdsaleDAO dao;
string public name;
string public description;
VotingLib.Option[11] public options;
mapping (address => uint) public voted;
VotingLib.Option public result;
uint public votesCount;
uint public duration; // UNIX
uint public created_at = now;
bool public finished = false;
uint public quorum;
string public votingType;
uint public minimalDuration = 60 * 60 * 24 * 7; // 7 days
}
interface VotingInterface {
function addVote(uint optionID) external;
function finish() external;
function getOptions() external constant returns(uint[2] result);
function finished() external constant returns(bool);
function voted(address _address) external constant returns (uint);
}
contract BaseProposal is VotingFields {
address baseVoting;
/*
* @dev Returns amount of votes for `yes` and `no` options
*/
function getOptions() public constant returns(uint[2]) {
return [options[1].votes, options[2].votes];
}
/*
* @dev Delegates request of adding vote to the Voting base contract
* @param _optionID ID of option which will be added as vote
*/
function addVote(uint _optionID) public {
VotingLib.delegatecallAddVote(baseVoting, _optionID);
}
/*
* @dev Initiates options `yes` and `no`
*/
function createOptions() internal {
options[1] = VotingLib.Option(0, "yes");
options[2] = VotingLib.Option(0, "no");
}
}
contract Regular is VotingFields {
address baseVoting;
function Regular(address _baseVoting, address _dao, string _name, string _description, uint _duration, bytes32[] _options){
require(_options.length >= 2 && _options.length <= 10);
baseVoting = _baseVoting;
votingType = "Regular";
VotingLib.delegatecallCreate(baseVoting, _dao, _name, _description, _duration, 0);
createOptions(_options);
}
/*
* @dev Returns amount of votes for all regular proposal's options
* @return Array[10] of int
*/
function getOptions() external constant returns(uint[10]) {
return [options[1].votes, options[2].votes, options[3].votes, options[4].votes, options[5].votes,
options[6].votes, options[7].votes, options[8].votes, options[9].votes, options[10].votes];
}
/*
* @dev Delegates request of adding vote to the Voting base contract
* @param _optionID ID of option which will be added as vote
*/
function addVote(uint _optionID) public {
VotingLib.delegatecallAddVote(baseVoting, _optionID);
}
/*
* @dev Delegates request of finishing to the Voting base contract
*/
function finish() public {
VotingLib.delegatecallFinish(baseVoting);
}
/*
* @dev Creates up to 10 options of votes
* @param _options Array of votes options
*/
function createOptions(bytes32[] _options) private {
for (uint i = 0; i < _options.length; i++) {
options[i + 1] = VotingLib.Option(0, _options[i]);
}
}
}
contract Withdrawal is BaseProposal {
uint public withdrawalSum;
address public withdrawalWallet;
bool public dxc;
function Withdrawal(address _baseVoting, address _dao, string _name, string _description, uint _duration, uint _sum, address _withdrawalWallet, bool _dxc) {
require(_sum > 0 && VotingLib.isValidWithdrawal(_dao, _sum, _dxc));
baseVoting = _baseVoting;
votingType = "Withdrawal";
VotingLib.delegatecallCreate(baseVoting, _dao, _name, _description, _duration, 0);
withdrawalSum = _sum;
withdrawalWallet = _withdrawalWallet;
dxc = _dxc;
createOptions();
}
/*
* @dev Delegates request of finishing to the Voting base contract
*/
function finish() public {
VotingLib.delegatecallFinish(baseVoting);
if(result.description == "yes") dao.withdrawal(withdrawalWallet, withdrawalSum, dxc);
}
}
contract Refund is BaseProposal {
function Refund(address _baseVoting, address _dao, string _name, string _description, uint _duration) {
baseVoting = _baseVoting;
votingType = "Refund";
VotingLib.delegatecallCreate(baseVoting, _dao, _name, _description, _duration, 90);
createOptions();
}
function finish() public {
VotingLib.delegatecallFinish(baseVoting);
if(result.description == "yes") dao.makeRefundableByVotingDecision();
}
}
contract Voting is VotingFields {
/*
* @dev Initiate storage variables for caller contract via `delegatecall`
* @param _dao Address of dao where voting is creating
* @param _name Voting name
* @param _description Voting description
* @param _duration Voting duration
* @param _quorum Minimal percentage of token holders who must to take part in voting
*/
function create(address _dao, bytes32 _name, bytes32 _description, uint _duration, uint _quorum)
succeededCrowdsale(ICrowdsaleDAO(_dao))
correctDuration(_duration)
external
{
dao = ICrowdsaleDAO(_dao);
name = Common.toString(_name);
description = Common.toString(_description);
duration = _duration;
quorum = _quorum;
}
/*
* @dev Add vote with passed optionID for the caller voting via `delegatecall`
* @param _optionID ID of option
*/
function addVote(uint _optionID) external notFinished canVote correctOption(_optionID) {
require(block.timestamp - duration < created_at);
uint tokensAmount = dao.token().balanceOf(msg.sender);
options[_optionID].votes += tokensAmount;
voted[msg.sender] = _optionID;
votesCount += tokensAmount;
dao.holdTokens(msg.sender, (duration + created_at) - now);
}
/*
* @dev Finish voting for the caller voting contract via `delegatecall`
* @param _optionID ID of option
*/
function finish() external notFinished {
require(block.timestamp - duration >= created_at);
finished = true;
if (keccak256(votingType) == keccak256("Withdrawal")) return finishNotRegular();
if (keccak256(votingType) == keccak256("Regular")) return finishRegular();
//Other two cases of votings (`Module` and `Refund`) requires quorum
if (Common.percent(options[1].votes, dao.token().totalSupply() - dao.teamTokensAmount(), 2) >= quorum) {
result = options[1];
return;
}
result = options[2];
}
/*
* @dev Finish regular voting. Calls from `finish` function
*/
function finishRegular() private {
VotingLib.Option memory _result = options[1];
bool equal = false;
for (uint i = 2; i < options.length; i++) {
if (_result.votes == options[i].votes) equal = true;
else if (_result.votes < options[i].votes) {
_result = options[i];
equal = false;
}
}
if (!equal) result = _result;
}
/*
* @dev Finish non-regular voting. Calls from `finish` function
*/
function finishNotRegular() private {
if (options[1].votes > options[2].votes) result = options[1];
else result = options[2];
}
/*
* @dev Throws if caller is team member, not participant or has voted already
*/
modifier canVote() {
require(!dao.teamMap(msg.sender) && dao.isParticipant(msg.sender) && voted[msg.sender] == 0);
_;
}
/*
* @dev Throws if voting is finished already
*/
modifier notFinished() {
require(!finished);
_;
}
/*
* @dev Throws if crowdsale is not finished or if soft cap is not achieved
*/
modifier succeededCrowdsale(ICrowdsaleDAO dao) {
require(dao.crowdsaleFinished() && dao.fundsRaised() >= dao.softCap());
_;
}
/*
* @dev Throws if description of provided option ID is empty
*/
modifier correctOption(uint optionID) {
require(options[optionID].description != 0x0);
_;
}
/*
* @dev Throws if passed voting duration is not greater than minimal
*/
modifier correctDuration(uint _duration) {
require(_duration >= minimalDuration || keccak256(votingType) == keccak256("Module"));
_;
}
}
contract Module is BaseProposal {
enum Modules{State, Payment, VotingDecisions, Crowdsale, VotingFactory}
Modules public module;
address public newModuleAddress;
function Module(address _baseVoting, address _dao, string _name, string _description, uint _duration, uint _module, address _newAddress) {
require(_module >= 0 && _module <= 4);
baseVoting = _baseVoting;
votingType = "Module";
module = Modules(_module);
newModuleAddress = _newAddress;
VotingLib.delegatecallCreate(baseVoting, _dao, _name, _description, _duration, 80);
createOptions();
}
/*
* @dev Delegates request of finishing to the Voting base contract
*/
function finish() public {
VotingLib.delegatecallFinish(baseVoting);
if(result.description == "no") return;
//Sorry but solidity doesn't support `switch` keyword
if (uint(module) == uint(Modules.State)) dao.setStateModule(newModuleAddress);
if (uint(module) == uint(Modules.Payment)) dao.setPaymentModule(newModuleAddress);
if (uint(module) == uint(Modules.VotingDecisions)) dao.setVotingDecisionModule(newModuleAddress);
if (uint(module) == uint(Modules.Crowdsale)) dao.setCrowdsaleModule(newModuleAddress);
if (uint(module) == uint(Modules.VotingFactory)) dao.setVotingFactoryAddress(newModuleAddress);
}
}
contract VotingFactory is VotingFactoryInterface {
address baseVoting;
DAOFactoryInterface public daoFactory;
function VotingFactory(address _baseVoting) {
baseVoting = _baseVoting;
}
/*
* @dev Create regular proposal with passed parameters. Calls from DAO contract
* @param _creator Address of caller of DAO's respectively function
* @param _name Voting's name
* @param _description Voting's description
* @param _duration Voting's duration
* @param _options Voting's options
*/
function createRegular(address _creator, string _name, string _description, uint _duration, bytes32[] _options)
external
onlyDAO
onlyParticipant(_creator)
returns (address)
{
return new Regular(baseVoting, msg.sender, _name, _description, _duration, _options);
}
/*
* @dev Create withdrawal proposal with passed parameters. Calls from DAO contract
* @param _creator Address of caller of DAO's respectively function
* @param _name Voting's name
* @param _description Voting's description
* @param _duration Voting's duration
* @param _sum Sum to withdraw from DAO
* @param _withdrawalWallet Address to send withdrawal sum
* @param _dxc Should withdrawal sum be interpret as amount of DXC tokens
*/
function createWithdrawal(address _creator, string _name, string _description, uint _duration, uint _sum, address _withdrawalWallet, bool _dxc)
external
onlyTeamMember(_creator)
onlyDAO
onlyWhiteList(_withdrawalWallet)
returns (address)
{
return new Withdrawal(baseVoting, msg.sender, _name, _description, _duration, _sum, _withdrawalWallet, _dxc);
}
/*
* @dev Create refund proposal with passed parameters. Calls from DAO contract
* @param _creator Address of caller of DAO's respectively function
* @param _name Voting's name
* @param _description Voting's description
* @param _duration Voting's duration
*/
function createRefund(address _creator, string _name, string _description, uint _duration) external onlyDAO onlyParticipant(_creator) returns (address) {
return new Refund(baseVoting, msg.sender, _name, _description, _duration);
}
/*
* @dev Create module proposal with passed parameters. Calls from DAO contract
* @param _creator Address of caller of DAO's respectively function
* @param _name Voting's name
* @param _description Voting's description
* @param _duration Voting's duration
* @param _module Which module should be changed
* @param _newAddress Address of new module
*/
function createModule(address _creator, string _name, string _description, uint _duration, uint _module, address _newAddress)
external
onlyDAO
onlyParticipant(_creator)
returns (address)
{
return new Module(baseVoting, msg.sender, _name, _description, _duration, _module, _newAddress);
}
/*
* @dev Set dao factory address. Calls ones from just deployed DAO
* @param _dao Address of dao factory
*/
function setDaoFactory(address _dao) external {
require(address(daoFactory) == 0x0 && _dao != 0x0);
daoFactory = DAOFactoryInterface(_dao);
}
/*
* @dev Throws if caller is not correct DAO
*/
modifier onlyDAO() {
require(daoFactory.exists(msg.sender));
_;
}
/*
* @dev Throws if creator is not participant of passed DAO
*/
modifier onlyParticipant(address creator) {
require(IDAO(msg.sender).isParticipant(creator));
_;
}
/*
* @dev Throws if creator is not team member of passed DAO
*/
modifier onlyTeamMember(address creator) {
require(IDAO(msg.sender).teamMap(creator));
_;
}
/*
* @dev Throws if creator is not member of white list in specified DAO
*/
modifier onlyWhiteList(address creator) {
require(IDAO(msg.sender).whiteList(creator));
_;
}
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) 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 returns (bool) {
require(_to != address(0));
// 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 constant returns (uint256 balance) {
return balances[_owner];
}
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant 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);
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) 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));
uint256 _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
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)
returns (bool success) {
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)
returns (bool success) {
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;
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(0x0, _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner public returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
contract Token is MintableToken {
event TokenCreation(address _address);
string public name;
string public symbol;
uint constant public decimals = 18;
mapping(address => uint) public held;
function Token(string _name, string _symbol) {
name = _name;
symbol = _symbol;
TokenCreation(this);
}
function hold(address addr, uint duration) external onlyOwner {
uint holdTime = now + duration;
if (held[addr] == 0 || holdTime > held[addr]) held[addr] = holdTime;
}
function burn(address _burner) external onlyOwner {
require(_burner != 0x0);
uint balance = balanceOf(_burner);
balances[_burner] = balances[_burner].sub(balance);
totalSupply = totalSupply.sub(balance);
}
function transfer(address to, uint256 value) public notHolded(msg.sender) returns (bool) {
return super.transfer(to, value);
}
function transferFrom(address from, address to, uint256 value) public notHolded(from) returns (bool) {
return super.transferFrom(from, to, value);
}
modifier notHolded(address _address) {
require(held[_address] == 0 || now >= held[_address]);
_;
}
}
contract DAOx is Ownable {
uint public balance;
DAOFactoryInterface public daoFactory;
function DAOx() {
}
function() payable onlyDAO {
balance += msg.value;
}
function setDaoFactory(address _dao) external {
require(address(daoFactory) == 0x0 && _dao != 0x0);
daoFactory = DAOFactoryInterface(_dao);
}
function withdraw(uint _weiToWithdraw) public onlyOwner {
balance -= _weiToWithdraw;
msg.sender.transfer(_weiToWithdraw);
}
modifier onlyDAO() {
require(daoFactory.exists(msg.sender));
_;
}
}
contract CrowdsaleDAOFactory is DAOFactoryInterface {
event CrowdsaleDAOCreated(
address _address,
string _name
);
address public serviceContractAddress;
address public votingFactoryContractAddress;
// DAOs created by factory
mapping(address => string) DAOs;
// Functional modules which will be used by DAOs to delegate calls
address[4] modules;
function CrowdsaleDAOFactory(address _serviceContractAddress, address _votingFactoryAddress, address[4] _modules) {
require(_serviceContractAddress != 0x0 && _votingFactoryAddress != 0x0);
serviceContractAddress = _serviceContractAddress;
votingFactoryContractAddress = _votingFactoryAddress;
modules = _modules;
require(votingFactoryContractAddress.call(bytes4(keccak256("setDaoFactory(address)")), this));
require(serviceContractAddress.call(bytes4(keccak256("setDaoFactory(address)")), this));
}
/*
* @dev Checks if provided address is an address of some DAO contract created by this factory
* @param _address Address of contract
* @return boolean indicating whether the contract was created by this factory or not
*/
function exists(address _address) external constant returns (bool) {
return keccak256(DAOs[_address]) != keccak256("");
}
/*
* @dev Creates new CrowdsaleDAO contract, provides it with addresses of modules, transfers ownership to tx sender
* and saves address of created contract to DAOs mapping
* @param _name Name of the DAO
* @param _name Description for the DAO
*/
function createCrowdsaleDAO(string _name, string _description) public {
address dao = DAODeployer.deployCrowdsaleDAO(_name, _description, serviceContractAddress, votingFactoryContractAddress);
require(dao.call(bytes4(keccak256("setStateModule(address)")), modules[0]));
require(dao.call(bytes4(keccak256("setPaymentModule(address)")), modules[1]));
require(dao.call(bytes4(keccak256("setVotingDecisionModule(address)")), modules[2]));
require(dao.call(bytes4(keccak256("setCrowdsaleModule(address)")), modules[3]));
DAODeployer.transferOwnership(dao, msg.sender);
DAOs[dao] = _name;
CrowdsaleDAOCreated(dao, _name);
}
}
contract DXC is MintableToken {
address[] public additionalOwnersList; // List of addresses which are able to call `mint` function
mapping(address => bool) public additionalOwners; // Mapping of addresses which are able to call `mint` function
uint public maximumSupply = 300000000 * 10**18; // Maximum supply of DXC tokens equals 300 millions
event TokenCreation(address _address);
event SetAdditionalOwners(address[] oldOwners, address[] newOwners);
string public constant name = "Daox Coin";
string public constant symbol = "DXC";
uint public constant decimals = 18;
/**
* @dev Transfer specified amount of tokens to the specified address and call
* standard `handleDXCPayment` method of Crowdsale DAO
* @param _to The address of Crowdsale DAO
* @param _amount The amount of tokens to send
*/
function contributeTo(address _to, uint256 _amount) public {
super.transfer(_to, _amount);
require(_to.call(bytes4(keccak256("handleDXCPayment(address,uint256)")), msg.sender, _amount));
}
/**
* @dev Overrides function to mint tokens from `MintableToken` contract with new modifier
* @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) isOwnerOrAdditionalOwner canMint maximumSupplyWasNotReached(_amount) public returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(0x0, _to, _amount);
return true;
}
/**
* @dev Define array and mapping of addresses that will be additional owners
* @param _owners The addresses that will be defined as additional owners
*/
function setAdditionalOwners(address[] _owners) onlyOwner {
SetAdditionalOwners(additionalOwnersList, _owners);
for (uint i = 0; i < additionalOwnersList.length; i++) {
additionalOwners[additionalOwnersList[i]] = false;
}
for (i = 0; i < _owners.length; i++) {
additionalOwners[_owners[i]] = true;
}
additionalOwnersList = _owners;
}
/**
* @dev Throws an exception if called not by owner or additional owner
*/
modifier isOwnerOrAdditionalOwner() {
require(msg.sender == owner || additionalOwners[msg.sender]);
_;
}
/**
* @dev Throws an exception if maximumSupply will be exceeded after minting
* @param _amount The amount of tokens to mint
*/
modifier maximumSupplyWasNotReached(uint256 _amount) {
require(totalSupply.add(_amount) <= maximumSupply);
_;
}
}
|
* @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 returns (bool) {
require(_to != address(0));
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
| 12,948,359
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./full_match/80001/0x9e931a143eC263C2eF9302ca6D859F80751f6941/sources/contracts/upgradeable/tokens/OpenSeaCollection.sol
|
solhint-disable-next-line ordering
|
function setName(string memory _name) public onlyRole(ADMIN_ROLE) nonEmptyString("name", _name) {
contractMetadata.name = _name;
_afterMetadataChange();
}
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] |
pragma solidity ^0.5.0;
// Spec L1
// LTLVariables: user:Ref
// LTLFairness: <>(finished(Crowdsale.buyTokens, (user == msg.sender))) && <>(finished(RefundableCrowdsale.claimRefund(ref), (ref == user)))
// LTLProperty: []((finished(FinalizableCrowdsale.finalize)) ==> <>(finished(send(from, to, amt), (to == user && amt == fsum(Crowdsale.buyTokens, 2, (msg.sender == user))))))
// Spec L2
// #LTLVariables: ben:Ref
// #LTLFairness: <>(finished(Crowdsale.buyTokens)) && <>(finished(FinalizableCrowdsale.finalize, (ben == Crowdsale.wallet())))
// #LTLProperty: []((INV {TimedCrowdsale.hasClosed() == true && RefundableCrowdsale.goalReached() == true && FinalizableCrowdsale.finalized() == false}) ==> <>(finished(send(from, to, amt), (to == ben && amt == fsum(Crowdsale.buyTokens, 2)))))
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;
}*/
}
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");
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @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");
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}*/
/**
* @dev Returns the 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");
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}*/
/**
* @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 Secondary is Context {
address private _primary;
/**
* @dev Emitted when the primary contract changes.
*/
event PrimaryTransferred(
address recipient
);
/**
* @dev Sets the primary account to the one that is creating the Secondary contract.
*/
constructor () internal {
address msgSender = _msgSender();
_primary = msgSender;
emit PrimaryTransferred(msgSender);
}
/**
* @dev Reverts if called from any account other than the primary.
*/
modifier onlyPrimary() {
require(_msgSender() == _primary, "Secondary: caller is not the primary account");
_;
}
/**
* @return the address of the primary.
*/
function primary() public view returns (address) {
return _primary;
}
/**
* @dev Transfers contract to a new primary.
* @param recipient The address of new primary.
*/
function transferPrimary(address recipient) public onlyPrimary {
require(recipient != address(0), "Secondary: new primary is the zero address");
_primary = recipient;
emit PrimaryTransferred(recipient);
}
}
contract Escrow is Secondary {
using SafeMath for uint256;
event Deposited(address indexed payee, uint256 weiAmount);
event Withdrawn(address indexed payee, uint256 weiAmount);
mapping(address => uint256) private _deposits;
function depositsOf(address payee) public view returns (uint256) {
return _deposits[payee];
}
/**
* @dev Stores the sent amount as credit to be withdrawn.
* @param payee The destination address of the funds.
*/
function deposit(address payee) public payable onlyPrimary {
uint256 amount = msg.value;
_deposits[payee] = _deposits[payee].add(amount);
emit Deposited(payee, amount);
}
/**
* @dev Withdraw accumulated balance for a payee.
* @param payee The address whose funds will be withdrawn and transferred to.
*/
function withdraw(address payable payee) public onlyPrimary {
uint256 payment = _deposits[payee];
_deposits[payee] = 0;
payee.transfer(payment);
emit Withdrawn(payee, payment);
}
}
contract ConditionalEscrow is Escrow {
/**
* @dev Returns whether an address is allowed to withdraw their funds. To be
* implemented by derived contracts.
* @param payee The destination address of the funds.
*/
function withdrawalAllowed(address payee) public view returns (bool);
function withdraw(address payable payee) public {
require(withdrawalAllowed(payee), "ConditionalEscrow: payee is not allowed to withdraw");
super.withdraw(payee);
}
}
contract RefundEscrow is ConditionalEscrow {
enum State { Active, Refunding, Closed }
event RefundsClosed();
event RefundsEnabled();
State private _state;
address payable private _beneficiary;
/**
* @dev Constructor.
* @param beneficiary The beneficiary of the deposits.
*/
constructor (address payable beneficiary) public {
require(beneficiary != address(0), "RefundEscrow: beneficiary is the zero address");
_beneficiary = beneficiary;
_state = State.Active;
}
/**
* @return The current state of the escrow.
*/
function state() public view returns (State) {
return _state;
}
/**
* @return The beneficiary of the escrow.
*/
function beneficiary() public view returns (address) {
return _beneficiary;
}
/**
* @dev Stores funds that may later be refunded.
* @param refundee The address funds will be sent to if a refund occurs.
*/
function deposit(address refundee) public payable {
require(_state == State.Active, "RefundEscrow: can only deposit while active");
super.deposit(refundee);
}
/**
* @dev Allows for the beneficiary to withdraw their funds, rejecting
* further deposits.
*/
function close() public onlyPrimary {
require(_state == State.Active, "RefundEscrow: can only close while active");
_state = State.Closed;
emit RefundsClosed();
}
/**
* @dev Allows for refunds to take place, rejecting further deposits.
*/
function enableRefunds() public onlyPrimary {
require(_state == State.Active, "RefundEscrow: can only enable refunds while active");
_state = State.Refunding;
emit RefundsEnabled();
}
/**
* @dev Withdraws the beneficiary's funds.
*/
function beneficiaryWithdraw() public {
require(_state == State.Closed, "RefundEscrow: beneficiary can only withdraw while closed");
_beneficiary.transfer(address(this).balance);
}
/**
* @dev Returns whether refundees can withdraw their deposits (be refunded). The overridden function receives a
* 'payee' argument, but we ignore it here since the condition is global, not per-payee.
*/
function withdrawalAllowed(address) public view returns (bool) {
return _state == State.Refunding;
}
}
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 SafeERC20 {
using SafeMath for uint256;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
//callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
require(token.transfer(to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
//callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
require(token.transferFrom(from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// 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));
require(token.approve(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));
require(token.approve(spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value);
//callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
require(token.approve(spender, newAllowance));
}
}
contract ReentrancyGuard {
bool private _notEntered;
constructor () internal {
// Storing an initial non-zero value makes deployment a bit more
// expensive, but in exchange the refund on every call to nonReentrant
// will be lower in amount. Since refunds are capped to a percetange of
// the total transaction's gas, it is best to keep them low in cases
// like this one, to increase the likelihood of the full refund coming
// into effect.
_notEntered = true;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_notEntered = false;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
}
contract Crowdsale is Context, ReentrancyGuard {
using SafeMath for uint256;
// The token being sold
IERC20 private _token;
// Address where funds are collected
address payable private _wallet;
// How many token units a buyer gets per wei.
// The rate is the conversion between wei and the smallest and indivisible token unit.
// So, if you are using a rate of 1 with a ERC20Detailed token with 3 decimals called TOK
// 1 wei will give you 1 unit, or 0.001 TOK.
uint256 private _rate;
// Amount of wei raised
uint256 private _weiRaised;
/**
* Event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokensPurchased(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
/**
* @param rate Number of token units a buyer gets per wei
* @dev The rate is the conversion between wei and the smallest and indivisible
* token unit. So, if you are using a rate of 1 with a ERC20Detailed token
* with 3 decimals called TOK, 1 wei will give you 1 unit, or 0.001 TOK.
* @param wallet Address where collected funds will be forwarded to
* @param token Address of the token being sold
*/
constructor (uint256 rate, address payable wallet, IERC20 token) public {
require(rate > 0, "Crowdsale: rate is 0");
require(wallet != address(0), "Crowdsale: wallet is the zero address");
require(address(token) != address(0), "Crowdsale: token is the zero address");
/* _rate = rate; */
_rate = 1;
_wallet = wallet;
_token = token;
}
/**
* @dev fallback function ***DO NOT OVERRIDE***
* Note that other contracts will transfer funds with a base gas stipend
* of 2300, which is not enough to call buyTokens. Consider calling
* buyTokens directly when purchasing tokens from a contract.
*/
function () external payable {
buyTokens(_msgSender());
}
/**
* @return the token being sold.
*/
function token() public view returns (IERC20) {
return _token;
}
/**
* @return the address where funds are collected.
*/
function wallet() public view returns (address payable) {
return _wallet;
}
/**
* @return the number of token units a buyer gets per wei.
*/
function rate() public view returns (uint256) {
return _rate;
}
/**
* @return the amount of wei raised.
*/
function weiRaised() public view returns (uint256) {
return _weiRaised;
}
/**
* @dev low level token purchase ***DO NOT OVERRIDE***
* This function has a non-reentrancy guard, so it shouldn't be called by
* another `nonReentrant` function.
* @param beneficiary Recipient of the token purchase
*/
function buyTokens(address beneficiary) public nonReentrant payable {
uint256 weiAmount = msg.value;
_preValidatePurchase(beneficiary, weiAmount);
// calculate token amount to be created
uint256 tokens = _getTokenAmount(weiAmount);
// update state
_weiRaised = _weiRaised.add(weiAmount);
_processPurchase(beneficiary, tokens);
emit TokensPurchased(_msgSender(), beneficiary, weiAmount, tokens);
_updatePurchasingState(beneficiary, weiAmount);
_forwardFunds();
_postValidatePurchase(beneficiary, weiAmount);
}
/**
* @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met.
* Use `super` in contracts that inherit from Crowdsale to extend their validations.
* Example from CappedCrowdsale.sol's _preValidatePurchase method:
* super._preValidatePurchase(beneficiary, weiAmount);
* require(weiRaised().add(weiAmount) <= cap);
* @param beneficiary Address performing the token purchase
* @param weiAmount Value in wei involved in the purchase
*/
function _preValidatePurchase(address beneficiary, uint256 weiAmount) internal view {
require(beneficiary != address(0), "Crowdsale: beneficiary is the zero address");
require(weiAmount != 0, "Crowdsale: weiAmount is 0");
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
}
/**
* @dev Validation of an executed purchase. Observe state and use revert statements to undo rollback when valid
* conditions are not met.
* @param beneficiary Address performing the token purchase
* @param weiAmount Value in wei involved in the purchase
*/
function _postValidatePurchase(address beneficiary, uint256 weiAmount) internal view {
// solhint-disable-previous-line no-empty-blocks
}
/**
* @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends
* its tokens.
* @param beneficiary Address performing the token purchase
* @param tokenAmount Number of tokens to be emitted
*/
function _deliverTokens(address beneficiary, uint256 tokenAmount) internal {
SafeERC20.safeTransfer(_token, beneficiary, tokenAmount);
}
/**
* @dev Executed when a purchase has been validated and is ready to be executed. Doesn't necessarily emit/send
* tokens.
* @param beneficiary Address receiving the tokens
* @param tokenAmount Number of tokens to be purchased
*/
function _processPurchase(address beneficiary, uint256 tokenAmount) internal {
_deliverTokens(beneficiary, tokenAmount);
}
/**
* @dev Override for extensions that require an internal state to check for validity (current user contributions,
* etc.)
* @param beneficiary Address receiving the tokens
* @param weiAmount Value in wei involved in the purchase
*/
function _updatePurchasingState(address beneficiary, uint256 weiAmount) internal {
// solhint-disable-previous-line no-empty-blocks
}
/**
* @dev Override to extend the way in which ether is converted to tokens.
* @param weiAmount Value in wei to be converted into tokens
* @return Number of tokens that can be purchased with the specified _weiAmount
*/
function _getTokenAmount(uint256 weiAmount) internal view returns (uint256) {
/* return weiAmount.mul(_rate); */
return weiAmount;
}
/**
* @dev Determines how ETH is stored/forwarded on purchases.
*/
function _forwardFunds() internal {
_wallet.transfer(msg.value);
}
}
contract TimedCrowdsale is Crowdsale {
using SafeMath for uint256;
uint256 private _openingTime;
uint256 private _closingTime;
/**
* Event for crowdsale extending
* @param newClosingTime new closing time
* @param prevClosingTime old closing time
*/
event TimedCrowdsaleExtended(uint256 prevClosingTime, uint256 newClosingTime);
/**
* @dev Reverts if not in crowdsale time range.
*/
modifier onlyWhileOpen {
require(isOpen(), "TimedCrowdsale: not open");
_;
}
/**
* @dev Constructor, takes crowdsale opening and closing times.
* @param openingTime Crowdsale opening time
* @param closingTime Crowdsale closing time
*/
constructor (uint256 openingTime, uint256 closingTime) public {
// solhint-disable-next-line not-rely-on-time
require(openingTime >= block.timestamp, "TimedCrowdsale: opening time is before current time");
// solhint-disable-next-line max-line-length
require(closingTime > openingTime, "TimedCrowdsale: opening time is not before closing time");
_openingTime = openingTime;
_closingTime = closingTime;
}
/**
* @return the crowdsale opening time.
*/
function openingTime() public view returns (uint256) {
return _openingTime;
}
/**
* @return the crowdsale closing time.
*/
function closingTime() public view returns (uint256) {
return _closingTime;
}
/**
* @return true if the crowdsale is open, false otherwise.
*/
function isOpen() public view returns (bool) {
// solhint-disable-next-line not-rely-on-time
return block.timestamp >= _openingTime && block.timestamp <= _closingTime;
}
/**
* @dev Checks whether the period in which the crowdsale is open has already elapsed.
* @return Whether crowdsale period has elapsed
*/
function hasClosed() public view returns (bool) {
// solhint-disable-next-line not-rely-on-time
return block.timestamp > _closingTime;
}
/**
* @dev Extend parent behavior requiring to be within contributing period.
* @param beneficiary Token purchaser
* @param weiAmount Amount of wei contributed
*/
function _preValidatePurchase(address beneficiary, uint256 weiAmount) internal onlyWhileOpen view {
super._preValidatePurchase(beneficiary, weiAmount);
}
/**
* @dev Extend crowdsale.
* @param newClosingTime Crowdsale closing time
*/
function _extendTime(uint256 newClosingTime) internal {
require(!hasClosed(), "TimedCrowdsale: already closed");
// solhint-disable-next-line max-line-length
require(newClosingTime > _closingTime, "TimedCrowdsale: new closing time is before current closing time");
emit TimedCrowdsaleExtended(_closingTime, newClosingTime);
_closingTime = newClosingTime;
}
}
contract FinalizableCrowdsale is TimedCrowdsale {
using SafeMath for uint256;
bool private _finalized;
event CrowdsaleFinalized();
constructor () internal {
_finalized = false;
}
/**
* @return true if the crowdsale is finalized, false otherwise.
*/
function finalized() public view returns (bool) {
return _finalized;
}
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() public {
require(!_finalized, "FinalizableCrowdsale: already finalized");
require(hasClosed(), "FinalizableCrowdsale: not closed");
_finalized = true;
_finalization();
emit CrowdsaleFinalized();
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super._finalization() to ensure the chain of finalization is
* executed entirely.
*/
function _finalization() internal {
// solhint-disable-previous-line no-empty-blocks
}
}
contract RefundableCrowdsale is Context, FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 private _goal;
// refund escrow used to hold funds while crowdsale is running
RefundEscrow private _escrow;
/**
* @dev Constructor, creates RefundEscrow.
* @param goal Funding goal
*/
constructor (uint256 goal) public {
require(goal > 0, "RefundableCrowdsale: goal is 0");
_escrow = new RefundEscrow(wallet());
_goal = goal;
}
/**
* @return minimum amount of funds to be raised in wei.
*/
function goal() public view returns (uint256) {
return _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful.
* @param refundee Whose refund will be claimed.
*/
function claimRefund(address payable refundee) public {
require(finalized(), "RefundableCrowdsale: not finalized");
require(!goalReached(), "RefundableCrowdsale: goal reached");
_escrow.withdraw(refundee);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised() >= _goal;
}
/**
* @dev Escrow finalization task, called when finalize() is called.
*/
function _finalization() internal {
if (goalReached()) {
_escrow.close();
_escrow.beneficiaryWithdraw();
} else {
_escrow.enableRefunds();
}
super._finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to escrow.
*/
function _forwardFunds() internal {
_escrow.deposit.value(msg.value)(_msgSender());
}
}
|
* @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens. @param beneficiary Address performing the token purchase @param tokenAmount Number of tokens to be emitted/
|
function _deliverTokens(address beneficiary, uint256 tokenAmount) internal {
SafeERC20.safeTransfer(_token, beneficiary, tokenAmount);
}
| 15,821,475
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./partial_match/1/0x32d5830F8d6D9Cdb36965C521E0e638d24c6B889/sources/Token.sol
|
* @dev Transfer token to a specified address. @param to The address to transfer to. @param value The amount to be transferred./
|
function transfer(address to, uint256 value) public returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
| 4,218,585
|
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pragma solidity ^0.4.17;
import "./PayrollInterface.sol";
import "github.com/ConsenSys/Tokens/contracts/HumanStandardToken.sol";
import "github.com/pipermerriam/ethereum-datetime/contracts/DateTime.sol";
import "github.com/Dexaran/ERC223-token-standard/token/ERC223/ERC223_receiving_contract.sol";
/**
* @title Payroll contract, for paying employees as per their prefrences
* @author Samuel Hawksby-Robinson <samuel@samyoul.com>
*/
contract Payroll is PayrollInterface, ERC223ReceivingContract {
/**
*
* CONTRACT ATTRIBUTES
*
*/
//--------------------------------//
// USERS //
//--------------------------------//
/**
* Employee
* @dev Data structure representing an Employee managed by the contract
* @param accountAddress is the Ethereum address associated with the Employee
* @param allowedTokens is an array of token contract addresses that Employee is permitted to be paid with
* @param requestedTokens is an array of token contract addresses the Employee wishes to be paid with
* @param tokenDistribution is an array of percentages representing how the Employee wishes to have thier payment split between tokens/Ether
* @param yearlyUSDSalary is the Employee's salary for a year in usdRate
* @param lastUpdatedDistribution is a timestamp representing the last time the Employee updated their distribution prefrences
* @param lastPayDay is a timestamp representing the last time the Employee collected their pay
*/
struct Employee {
address accountAddress;
address[] allowedTokens;
address[] requestedTokens;
uint256[] tokenDistribution;
uint256 yearlyUSDSalary;
uint lastUpdatedDistribution;
uint lastPayDay;
}
/**
* owner
* @dev The address of the contract owner.
*/
address owner;
/**
* employees
* @dev array of Employees, id are the index
*/
Employee[] employees;
/**
* employee ids
* @dev mapping of the employee ids to the respective employee's address
*/
mapping (address => uint256) employeeIds;
/**
* oracle
* @dev The address of the authorised oracle.
*/
address oracle;
//--------------------------------//
// STATES //
//--------------------------------//
/**
* escaped
* @dev Is the contract in emergency escaped mode? In escape mode most of the functionality of the contract is prohibited.
*/
bool escaped = false;
//--------------------------------//
// CALCULATION DATA //
//--------------------------------//
/**
* last employee ids
* @dev The last id given to an Employee
*/
uint256 internal lastEmployeeId = 0;
/**
* employee count
* @dev The number of employees managed by the contract
*/
uint256 internal employeeCount = 0;
/**
* Total Yearly USD Salary
* @dev The amount all Employees are paid annually in USD
*/
uint256 internal totalYearlyUSDSalary = 0;
/**
* Ether USD Rate
* @dev The rate at which 1 Ether token can be purchased with USD
*/
uint256 internal etherUSDRate;
/**
* Last Token Id
* @dev The last id given to a Token
*/
uint256 internal lastTokenId = 0;
//--------------------------------//
// TOKENS //
//--------------------------------//
/**
* Token
* @dev Data structure representing an ERC20/223 token and its USD Exchange Rate
* @param tokenAddress is the address of the token CONTRACT
* @param usdRate is the rate at which one Ether token can be purchased with USD
*/
struct Token {
address tokenAddress;
uint256 usdRate;
}
/**
* Tokens Handled
* @dev A list of Tokens managed by the contract
*/
Token[] tokensHandled;
/**
* Token Ids
* @dev mapping of token addresses to Token ids
*/
mapping(address => uint256) tokenIds;
mapping(address => uint256) tokenDemand;
//--------------------------------//
// EVENTS //
//--------------------------------//
/**
* Tokens Received
* @dev a log of incomming tokens.
* @param _token is the address of the token contract
* @param _from is the address of transaction originator
* @param _value is the amount of tokens transfered to this contract
*/
event TokensReceived(
address _token,
address _from,
uint256 _value
);
/**
*
* CONTRACT METHODS
*
*/
//--------------------------------//
// CONSTRUCTOR //
//--------------------------------//
function Payroll(address _oracle) public{
owner = msg.sender;
oracle = _oracle;
}
//--------------------------------//
// MODIFIERS //
//--------------------------------//
/**
* If owner
* @dev Checks if sender is the contract creator, on fail revert.
*/
modifier ifOwner(){
if(owner != msg.sender){
revert();
}
_;
}
/**
* If not escaped
* @dev Checks if contract is in "Escape Hatch Mode" and if the sender is authorised.
* @dev If the contract is in "Escape Hatch Mode" and sender is not authorised revert
*/
modifier ifNotEscaped(){
if(escaped && owner != msg.sender){
revert();
}
_;
}
/**
* If employee
* @dev Check if the sender is in the employee list, on fail revert.
*/
modifier ifEmployee(){
if(!(employeeIds[msg.sender] > 0)){
revert();
}
_;
}
/**
* If oracle
* @dev Checks if sender is the approved oracle
*/
modifier ifOracle(){
if(oracle != msg.sender){
revert();
}
_;
}
//--------------------------------//
// OWNER ONLY //
//--------------------------------//
/**
* Add employee
* @dev Adds a new Employee to the records
* @param accountAddress is the public key for the Employee
* @param allowedTokens is a list of tokens that the Employee is willing to be paid with
* @param initialYearlyUSDSalary is the Employee's annual USD salary
* @return employeeId the ID of the employee
*/
function addEmployee(address accountAddress, address[] allowedTokens, uint256 initialYearlyUSDSalary) public ifOwner ifNotEscaped returns(uint256 employeeId){
require(initialYearlyUSDSalary > 0);
// Check that the tokens are in the managed list
for (uint i = 0; i < allowedTokens.length; i++) {
if(!(tokenIds[allowedTokens[i]] > 0)){
revert();
}
}
employeeId = lastEmployeeId++;
employeeCount++;
address[] memory defaultToken = new address[](1);
defaultToken[0] = this; // NOTE: If the token address is this Ether will be transfered.
uint256[] memory defaultDistribution = new uint256[](1);
defaultDistribution[0] = 100;
employees[employeeId] = Employee(
accountAddress,
allowedTokens,
defaultToken,
defaultDistribution,
initialYearlyUSDSalary,
0,
0
);
employeeIds[accountAddress] = employeeId;
_updateTotalYearlySalaries(0, initialYearlyUSDSalary);
return employeeId;
}
/**
* Set employee salary
* @dev Sets an employee's salary
* @param employeeId is the identifier for the Employee
* @param yearlyUSDSalary is the new Employee's annual USD salary
*/
function setEmployeeSalary(uint256 employeeId, uint256 yearlyUSDSalary) public ifOwner ifNotEscaped{
require(yearlyUSDSalary > 0);
_adjustSalary(employeeId, yearlyUSDSalary);
}
/**
* Remove Employee
* @dev Removes an Employee from the list of employees
* @param employeeId is the identifier for the Employee
*/
function removeEmployee(uint256 employeeId) public ifOwner ifNotEscaped{
_adjustSalary(employeeId, 0);
Employee storage employee = employees[employeeId];
delete employeeIds[employee.accountAddress];
delete employees[employeeId];
employeeCount--;
}
/**
* Switch oracle
* @dev Allows owner to change the oracle public key
* @param _oracle is the public key of the USD exchange oracle
*/
function switchOracle(address _oracle) public ifOwner ifNotEscaped{
oracle = _oracle;
}
/**
* Adjust salaries
* INTERNAL
* @dev Updates an employee's salary and global salaries
* @param employeeId is the identifier for the Employee
* @param newSalary is the value of the employee's new salary
*/
function _adjustSalary(uint256 employeeId, uint256 newSalary) internal ifNotEscaped{
Employee storage E = employees[employeeId];
_updateTotalYearlySalaries(E.yearlyUSDSalary, newSalary);
E.yearlyUSDSalary = newSalary;
}
/**
* Update total yearly salaries
* INTERNAL
* @dev Updates the global salary value, the function presumes update is performed on an Employee basis
* @param currentSalary is the last salary value an employee had
* @param newSalary is the new salary value an employee will be assigned
*/
function _updateTotalYearlySalaries(uint256 currentSalary, uint256 newSalary) internal{
totalYearlyUSDSalary += newSalary - currentSalary;
}
/**
* Authorised Token
* @dev Authorise a new token to be managed by the contract
* @param _token is the address of the new token to authorise
*/
function authoriseToken(address _token) public ifOwner ifNotEscaped{
// Are we managing this token already?
if((tokenIds[msg.sender] > 0)){
revert();
}
Token memory newToken = Token(_token, 0);
uint256 tokenId = lastTokenId++;
tokenIds[_token] = tokenId;
tokensHandled[tokenId] = newToken;
}
/**
* Escape hatch
* @dev places the contract into an emergency mode restricts contract functionality
* @dev allows time for the developers to fix a problem without a hacker being able to continously exploit a bug in the contract
*/
function escapeHatch() public ifOwner{
escaped = true;
//Rescue all the tokens
for (uint i = 0; i < tokensHandled.length; i++) {
Token storage token = tokensHandled[i];
HumanStandardToken humanToken = HumanStandardToken(token.tokenAddress);
humanToken.transfer(msg.sender, humanToken.balanceOf(this));
}
// Rescue the Ether
msg.sender.transfer(this.balance);
}
/**
* Back To Business
* @dev reactivates the contract and allows normal functionality
*/
function backToBusiness() public ifOwner{
escaped = false;
}
/**
* Update Rates
*/
function updateRates() public ifOwner ifNotEscaped{
_updateEtherUSDRate();
_updateTokenUSDRates();
}
function _updateEtherUSDRate() internal{
// functionality that interacts with an API Endpoint abstraction contract
}
function _updateTokenUSDRates() internal{
// functionality that interacts with an API Endpoint abstraction contract
}
//--------------------------------//
// PUBLIC METHODS //
//--------------------------------//
/**
* Add funds
* @dev Allows a user to transfer Ether to the contract balance
*/
function addFunds() payable public ifNotEscaped returns(string){
return "Thanks for the Ether :D, Love from Aragon <3.";
}
/**
* Token Fallback
* @dev Allows a user to transfer tokens to the contract address if the token contract is ERC223 complient
*/
function tokenFallback(address _from, uint _value, bytes _data) ifNotEscaped {
// Check token is in the managed list
if(!(tokenIds[msg.sender] > 0)){
revert();
}
TokensReceived(msg.sender, _from, _value);
}
//--------------------------------//
// PUBLIC GETTERS //
//--------------------------------//
/**
* Get employee count
* @dev returns the number of employees managed by the contract
*/
function getEmployeeCount() public constant returns (uint256){
return employeeCount;
}
/**
* Get employee
* @dev Returns important data stored about an employee based on a given ID
* @param employeeId is the identifier for the Employee
* @return accountAddress is the address of the Employee
* @return allowedTokens is a list of the tokens the Employee is allowed to be paid in
* @return yearlyUSDSalary is the Employee's annual USD salary
* @return lastPayDay is the timestemp representing the last time the employee fired the payday function
*/
function getEmployee(uint256 employeeId) public constant returns (
address accountAddress,
address[] allowedTokens,
uint256 yearlyUSDSalary,
uint lastPayDay
){
Employee storage E = employees[employeeId];
accountAddress = E.accountAddress;
allowedTokens = E.allowedTokens;
yearlyUSDSalary = E.yearlyUSDSalary;
lastPayDay = E.lastPayDay;
}
/**
* Calculate Payroll Burnrate
* @dev Caluclates the current rate in USD that the contract spends per month
* @return the current monthly spend value in USD
*/
function calculatePayrollBurnrate() public constant returns (uint256){
return totalYearlyUSDSalary / 12;
}
/**
* Calculate Payroll Runway
* @dev Calculates the number of days before the contract will run out of funds
* @dev Because this each token balance can expire independantly we need to display the lowest balance to days ratio
* @return the number of days before the contract will run out of funds
*/
function calculatePayrollRunway() public returns (uint256){
// Get the balances of each token
uint256[] memory balances = new uint256[](tokensHandled.length+1);
// Get ether balance in USD and reset demand count
balances[0] = this.balance * etherUSDRate;
tokenDemand[address(this)] = 0;
// Reset mapping of total demand by token and get balance of each token
for (uint256 z = 0; z < tokensHandled.length; z++){
Token storage token = tokensHandled[z];
tokenDemand[token.tokenAddress] = 0;
HumanStandardToken humanToken = HumanStandardToken(token.tokenAddress);
balances[z+1] += (humanToken.balanceOf(this) * token.usdRate);
}
// Get the total annual demand for each employee
for (uint256 i = 0; i < employees.length; i++){
Employee storage employee = employees[i];
for (uint256 x = 0; x < employee.requestedTokens.length; x++){
tokenDemand[employee.requestedTokens[x]] += employee.yearlyUSDSalary * employee.tokenDistribution[x] / 100;
}
}
// Compare token demand against balance
// Set Ether as the lowest balance to begin with
uint256 lowestBalanceDays = balances[0] / tokenDemand[this] / 365;
// look at the other balances
for (uint256 y = 1; y > balances.length; y++){
Token storage tokenCompare = tokensHandled[z-1];
uint256 tokenDays = balances[y] / tokenDemand[tokenCompare.tokenAddress] / 365;
if (tokenDays < lowestBalanceDays){
lowestBalanceDays = tokenDays;
}
}
return lowestBalanceDays;
}
//--------------------------------//
// EMPLOYEE ONLY //
//--------------------------------//
/**
* Determine allocation
* @dev An employee can set the how they want to be paid spliting their payment among a list of tokens
* @dev The employee can only set this data everty 6 months.
* @param tokens is a list of token addresses the sender wishes to be paid with
* @param distribution is a list of integers that define the percentage that user wishes each token factor as part of their payment
*/
function determineAllocation(address[] tokens, uint256[] distribution) public ifNotEscaped ifEmployee{
Employee storage employee = employees[employeeIds[msg.sender]];
// Has six months passed since last allocation?
if(!(now > _incrementMonths(6, employee.lastUpdatedDistribution))){
revert();
}
else{
// Check both arrays have the same length
if(tokens.length != distribution.length){
revert();
}
// Check addresses match authorised addresses
for (uint i = 0; i < tokens.length; i++) {
bool result = false;
for (uint x = 0; x < employee.allowedTokens.length; x++) {
if(tokens[i] == employee.allowedTokens[x]){
result = true;
}
}
if(!result){
revert();
}
}
// Check that distribution adds upto 100
uint256 distributionTotal = 0;
for(uint t = 0; t < distribution.length; t++){
distributionTotal += distribution[t];
}
if(distributionTotal != 100){
revert();
}
employee.requestedTokens = tokens;
employee.tokenDistribution = distribution;
employee.lastUpdatedDistribution = now;
}
}
/**
* Pay day.
* @dev Called by an employee to claim their monthly pay.
* @dev This is only callable once per month by an employee
*/
function payday() public ifNotEscaped ifEmployee{
//TODO check make a count so if a employee misses a payment they can take it later.
Employee storage employee = employees[employeeIds[msg.sender]];
// Has there been at least 1 month since the last payday?
if(!(now > _incrementMonths(1, employee.lastPayDay))){
revert();
}
for (uint i = 0; i < employee.requestedTokens.length; i++) {
// Calculate the amount of each token you need to pay, split monthly pay by proportion
uint256 proportion = (employee.yearlyUSDSalary / 12) / employee.tokenDistribution[i];
uint256 tokenSplit;
// Divide proportion by exchange rate to get the split
// Check requestedToken is this, handle as Ether
if (address(employee.requestedTokens[i]) == address(this)){
tokenSplit = proportion / etherUSDRate;
msg.sender.transfer(tokenSplit);
}
else{
Token storage token = tokensHandled[tokenIds[employee.requestedTokens[i]]];
tokenSplit = proportion / token.usdRate;
HumanStandardToken humanToken = HumanStandardToken(token.tokenAddress);
humanToken.transfer(msg.sender, tokenSplit);
}
}
}
/**
* Increment months
* INTERNAL
* @dev takes a timestamp and increments it by a number of months
* @param _months is the number of months to increment the timestamp by
* @param _timestamp is the date to increase by the number of months
*/
function _incrementMonths(uint16 _months, uint _timestamp) internal returns (uint){
DateTime dateTime = DateTime(address(0x1a6184cd4c5bea62b0116de7962ee7315b7bcbce));
uint16 year = dateTime.getYear(_timestamp);
uint16 month = dateTime.getMonth(_timestamp);
month += _months;
while(month > 12){
month -= 12;
year++;
}
// get new timestamp
return dateTime.toTimestamp(
year,
uint8(month),
dateTime.getDay(_timestamp),
dateTime.getHour(_timestamp),
dateTime.getMinute(_timestamp),
dateTime.getSecond(_timestamp)
);
}
//--------------------------------//
// ORACLE ONLY //
//--------------------------------//
/**
* Set Token USD Exchange Rate
* @dev Callback methonf only callable by the authorised oracle, sets the <token>/USD exchange rate
* @param _token is the contract address that maintains a specific Token
* @param usdExchangeRate is the rate at which 1 token can be purchased with USD
*/
function setExchangeRate(address _token, uint256 usdExchangeRate) public ifOracle ifNotEscaped{
Token storage token = tokensHandled[tokenIds[_token]];
HumanStandardToken humanToken = HumanStandardToken(token.tokenAddress);
token.usdRate = usdExchangeRate * humanToken.decimals();
}
/**
* Set Ether USD Exchange rate
* @dev Callback method only callable by the authorised oracle, sets the ETH/USD exchange rate
* @param usdExchangeRate is the rate at which 1 ether can be purchased with USD
*/
function setExchangeRate(uint256 usdExchangeRate) public ifOracle ifNotEscaped{
etherUSDRate = usdExchangeRate;
}
}
|
* Tokens Handled @dev A list of Tokens managed by the contract/
|
Token[] tokensHandled;
| 12,603,184
|
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pragma solidity ^0.6.6;
pragma experimental ABIEncoderV2;
import "./Address.sol";
import "./IACOPool2.sol";
/**
* @title ACOPoolFactory
* @dev The contract is the implementation for the ACOProxy.
*/
contract ACOPoolFactory2 {
/**
* @dev Struct to store the ACO pool basic data.
*/
struct ACOPoolBasicData {
/**
* @dev Address of the underlying asset (0x0 for Ethereum).
*/
address underlying;
/**
* @dev Address of the strike asset (0x0 for Ethereum).
*/
address strikeAsset;
/**
* @dev True if the type is CALL, false for PUT.
*/
bool isCall;
}
/**
* @dev Emitted when the factory admin address has been changed.
* @param previousFactoryAdmin Address of the previous factory admin.
* @param newFactoryAdmin Address of the new factory admin.
*/
event SetFactoryAdmin(address indexed previousFactoryAdmin, address indexed newFactoryAdmin);
/**
* @dev Emitted when the ACO pool implementation has been changed.
* @param previousAcoPoolImplementation Address of the previous ACO pool implementation.
* @param previousAcoPoolImplementation Address of the new ACO pool implementation.
*/
event SetAcoPoolImplementation(address indexed previousAcoPoolImplementation, address indexed newAcoPoolImplementation);
/**
* @dev Emitted when the ACO factory has been changed.
* @param previousAcoFactory Address of the previous ACO factory.
* @param newAcoFactory Address of the new ACO factory.
*/
event SetAcoFactory(address indexed previousAcoFactory, address indexed newAcoFactory);
/**
* @dev Emitted when the Chi Token has been changed.
* @param previousChiToken Address of the previous Chi Token.
* @param newChiToken Address of the new Chi Token.
*/
event SetChiToken(address indexed previousChiToken, address indexed newChiToken);
/**
* @dev Emitted when the asset converter helper has been changed.
* @param previousAssetConverterHelper Address of the previous asset converter helper.
* @param newAssetConverterHelper Address of the new asset converter helper.
*/
event SetAssetConverterHelper(address indexed previousAssetConverterHelper, address indexed newAssetConverterHelper);
/**
* @dev Emitted when the ACO Pool fee has been changed.
* @param previousAcoFee Value of the previous ACO Pool fee.
* @param newAcoFee Value of the new ACO Pool fee.
*/
event SetAcoPoolFee(uint256 indexed previousAcoFee, uint256 indexed newAcoFee);
/**
* @dev Emitted when the ACO Pool fee destination address has been changed.
* @param previousAcoPoolFeeDestination Address of the previous ACO Pool fee destination.
* @param newAcoPoolFeeDestination Address of the new ACO Pool fee destination.
*/
event SetAcoPoolFeeDestination(address indexed previousAcoPoolFeeDestination, address indexed newAcoPoolFeeDestination);
/**
* @dev Emitted when the ACO Pool penalty percentage on withdrawing open positions has been changed.
* @param previousWithdrawOpenPositionPenalty Value of the previous penalty percentage on withdrawing open positions.
* @param newWithdrawOpenPositionPenalty Value of the new penalty percentage on withdrawing open positions.
*/
event SetAcoPoolWithdrawOpenPositionPenalty(uint256 indexed previousWithdrawOpenPositionPenalty, uint256 indexed newWithdrawOpenPositionPenalty);
/**
* @dev Emitted when the ACO Pool underlying price percentage adjust has been changed.
* @param previousUnderlyingPriceAdjustPercentage Value of the previous ACO Pool underlying price percentage adjust.
* @param newUnderlyingPriceAdjustPercentage Value of the new ACO Pool underlying price percentage adjust.
*/
event SetAcoPoolUnderlyingPriceAdjustPercentage(uint256 indexed previousUnderlyingPriceAdjustPercentage, uint256 indexed newUnderlyingPriceAdjustPercentage);
/**
* @dev Emitted when the ACO Pool maximum number of open ACOs allowed has been changed.
* @param previousMaximumOpenAco Value of the previous ACO Pool maximum number of open ACOs allowed.
* @param newMaximumOpenAco Value of the new ACO Pool maximum number of open ACOs allowed.
*/
event SetAcoPoolMaximumOpenAco(uint256 indexed previousMaximumOpenAco, uint256 indexed newMaximumOpenAco);
/**
* @dev Emitted when permission for an ACO pool admin has been changed.
* @param poolAdmin Address of the ACO pool admin.
* @param previousPermission The previous permission situation.
* @param newPermission The new permission situation.
*/
event SetAcoPoolPermission(address indexed poolAdmin, bool indexed previousPermission, bool indexed newPermission);
/**
* @dev Emitted when a strategy permission has been changed.
* @param strategy Address of the strategy.
* @param previousPermission The previous strategy permission.
* @param newPermission The new strategy permission.
*/
event SetStrategyPermission(address indexed strategy, bool indexed previousPermission, bool newPermission);
/**
* @dev Emitted when a new ACO pool has been created.
* @param underlying Address of the underlying asset (0x0 for Ethereum).
* @param strikeAsset Address of the strike asset (0x0 for Ethereum).
* @param isCall True if the type is CALL, false for PUT.
* @param acoPool Address of the new ACO pool created.
* @param acoPoolImplementation Address of the ACO pool implementation used on creation.
*/
event NewAcoPool(address indexed underlying, address indexed strikeAsset, bool indexed isCall, address acoPool, address acoPoolImplementation);
/**
* @dev The factory admin address.
*/
address public factoryAdmin;
/**
* @dev The ACO pool implementation address.
*/
address public acoPoolImplementation;
/**
* @dev The ACO factory address.
*/
address public acoFactory;
/**
* @dev The ACO asset converter helper.
*/
address public assetConverterHelper;
/**
* @dev The Chi Token address.
*/
address public chiToken;
/**
* @dev The ACO Pool fee value.
* It is a percentage value (100000 is 100%).
*/
uint256 public acoPoolFee;
/**
* @dev The ACO Pool fee destination address.
*/
address public acoPoolFeeDestination;
/**
* @dev The ACO Pool penalty percentage on withdrawing open positions.
*/
uint256 public acoPoolWithdrawOpenPositionPenalty;
/**
* @dev The ACO Pool underlying price percentage adjust.
*/
uint256 public acoPoolUnderlyingPriceAdjustPercentage;
/**
* @dev The ACO Pool maximum number of open ACOs allowed.
*/
uint256 public acoPoolMaximumOpenAco;
/**
* @dev The ACO pool admin permissions.
*/
mapping(address => bool) public poolAdminPermission;
/**
* @dev The strategies permitted.
*/
mapping(address => bool) public strategyPermitted;
/**
* @dev The ACO pool basic data.
*/
mapping(address => ACOPoolBasicData) public acoPoolBasicData;
/**
* @dev Modifier to check if the `msg.sender` is the factory admin.
* Only factory admin address can execute.
*/
modifier onlyFactoryAdmin() {
require(msg.sender == factoryAdmin, "ACOPoolFactory::onlyFactoryAdmin");
_;
}
/**
* @dev Modifier to check if the `msg.sender` is a pool admin.
* Only a pool admin address can execute.
*/
modifier onlyPoolAdmin() {
require(poolAdminPermission[msg.sender], "ACOPoolFactory::onlyPoolAdmin");
_;
}
/**
* @dev Function to initialize the contract.
* It should be called through the `data` argument when creating the proxy.
* It must be called only once. The first `require` is to guarantee that behavior.
* @param _factoryAdmin Address of the factory admin.
* @param _acoPoolImplementation Address of the ACO pool implementation.
* @param _acoFactory Address of the ACO token factory.
* @param _assetConverterHelper Address of the asset converter helper.
* @param _chiToken Address of the Chi token.
* @param _acoPoolFee ACO pool fee percentage.
* @param _acoPoolFeeDestination ACO pool fee destination.
* @param _acoPoolWithdrawOpenPositionPenalty ACO pool penalty percentage on withdrawing open positions.
* @param _acoPoolUnderlyingPriceAdjustPercentage ACO pool underlying price percentage adjust.
* @param _acoPoolMaximumOpenAco ACO pool maximum number of open ACOs allowed.
*/
function init(
address _factoryAdmin,
address _acoPoolImplementation,
address _acoFactory,
address _assetConverterHelper,
address _chiToken,
uint256 _acoPoolFee,
address _acoPoolFeeDestination,
uint256 _acoPoolWithdrawOpenPositionPenalty,
uint256 _acoPoolUnderlyingPriceAdjustPercentage,
uint256 _acoPoolMaximumOpenAco
) public {
require(factoryAdmin == address(0) && acoPoolImplementation == address(0), "ACOPoolFactory::init: Contract already initialized.");
_setFactoryAdmin(_factoryAdmin);
_setAcoPoolImplementation(_acoPoolImplementation);
_setAcoFactory(_acoFactory);
_setAssetConverterHelper(_assetConverterHelper);
_setChiToken(_chiToken);
_setAcoPoolFee(_acoPoolFee);
_setAcoPoolFeeDestination(_acoPoolFeeDestination);
_setAcoPoolWithdrawOpenPositionPenalty(_acoPoolWithdrawOpenPositionPenalty);
_setAcoPoolUnderlyingPriceAdjustPercentage(_acoPoolUnderlyingPriceAdjustPercentage);
_setAcoPoolMaximumOpenAco(_acoPoolMaximumOpenAco);
_setAcoPoolPermission(_factoryAdmin, true);
}
/**
* @dev Function to guarantee that the contract will not receive ether.
*/
receive() external payable virtual {
revert();
}
/**
* @dev Function to create a new ACO pool.
* It deploys a minimal proxy for the ACO pool implementation address.
* @param underlying Address of the underlying asset (0x0 for Ethereum).
* @param strikeAsset Address of the strike asset (0x0 for Ethereum).
* @param isCall True if the type is CALL, false for PUT.
* @param tolerancePriceBelow The below tolerance price percentage for ACO tokens.
* @param tolerancePriceAbove The above tolerance price percentage for ACO tokens.
* @param minExpiration The minimum expiration seconds after the current time for ACO tokens.
* @param maxExpiration The maximum expiration seconds after the current time for ACO tokens.
* @param strategy Address of the pool strategy to be used.
* @param baseVolatility The base volatility for the pool starts. It is a percentage value (100000 is 100%).
* @return The created ACO pool address.
*/
function createAcoPool(
address underlying,
address strikeAsset,
bool isCall,
uint256 tolerancePriceBelow,
uint256 tolerancePriceAbove,
uint256 minExpiration,
uint256 maxExpiration,
address strategy,
uint256 baseVolatility
) onlyFactoryAdmin external virtual returns(address) {
_validateStrategy(strategy);
return _createAcoPool(IACOPool2.InitData(
acoFactory,
chiToken,
underlying,
strikeAsset,
isCall,
assetConverterHelper,
acoPoolFee,
acoPoolFeeDestination,
acoPoolWithdrawOpenPositionPenalty,
acoPoolUnderlyingPriceAdjustPercentage,
acoPoolMaximumOpenAco,
tolerancePriceBelow,
tolerancePriceAbove,
minExpiration,
maxExpiration,
strategy,
baseVolatility
));
}
/**
* @dev Function to set the factory admin address.
* Only can be called by the factory admin.
* @param newFactoryAdmin Address of the new factory admin.
*/
function setFactoryAdmin(address newFactoryAdmin) onlyFactoryAdmin external virtual {
_setFactoryAdmin(newFactoryAdmin);
}
/**
* @dev Function to set the ACO pool implementation address.
* Only can be called by the factory admin.
* @param newAcoPoolImplementation Address of the new ACO pool implementation.
*/
function setAcoPoolImplementation(address newAcoPoolImplementation) onlyFactoryAdmin external virtual {
_setAcoPoolImplementation(newAcoPoolImplementation);
}
/**
* @dev Function to set the ACO factory address.
* Only can be called by the factory admin.
* @param newAcoFactory Address of the ACO token factory.
*/
function setAcoFactory(address newAcoFactory) onlyFactoryAdmin external virtual {
_setAcoFactory(newAcoFactory);
}
/**
* @dev Function to set the Chi Token address.
* Only can be called by the factory admin.
* @param newChiToken Address of the new Chi Token.
*/
function setChiToken(address newChiToken) onlyFactoryAdmin external virtual {
_setChiToken(newChiToken);
}
/**
* @dev Function to set the asset converter helper address.
* Only can be called by the factory admin.
* @param newAssetConverterHelper Address of the new asset converter helper.
*/
function setAssetConverterHelper(address newAssetConverterHelper) onlyFactoryAdmin external virtual {
_setAssetConverterHelper(newAssetConverterHelper);
}
/**
* @dev Function to set the ACO Pool fee.
* Only can be called by the factory admin.
* @param newAcoPoolFee Value of the new ACO Pool fee. It is a percentage value (100000 is 100%).
*/
function setAcoPoolFee(uint256 newAcoPoolFee) onlyFactoryAdmin external virtual {
_setAcoPoolFee(newAcoPoolFee);
}
/**
* @dev Function to set the ACO Pool destination address.
* Only can be called by the factory admin.
* @param newAcoPoolFeeDestination Address of the new ACO Pool destination.
*/
function setAcoPoolFeeDestination(address newAcoPoolFeeDestination) onlyFactoryAdmin external virtual {
_setAcoPoolFeeDestination(newAcoPoolFeeDestination);
}
/**
* @dev Function to set the ACO Pool penalty percentage on withdrawing open positions.
* Only can be called by the factory admin.
* @param newWithdrawOpenPositionPenalty Value of the new ACO Pool penalty percentage on withdrawing open positions. It is a percentage value (100000 is 100%).
*/
function setAcoPoolWithdrawOpenPositionPenalty(uint256 newWithdrawOpenPositionPenalty) onlyFactoryAdmin external virtual {
_setAcoPoolWithdrawOpenPositionPenalty(newWithdrawOpenPositionPenalty);
}
/**
* @dev Function to set the ACO Pool underlying price percentage adjust.
* Only can be called by the factory admin.
* @param newUnderlyingPriceAdjustPercentage Value of the new ACO Pool underlying price percentage adjust. It is a percentage value (100000 is 100%).
*/
function setAcoPoolUnderlyingPriceAdjustPercentage(uint256 newUnderlyingPriceAdjustPercentage) onlyFactoryAdmin external virtual {
_setAcoPoolUnderlyingPriceAdjustPercentage(newUnderlyingPriceAdjustPercentage);
}
/**
* @dev Function to set the ACO Pool maximum number of open ACOs allowed.
* Only can be called by the factory admin.
* @param newMaximumOpenAco Value of the new ACO Pool maximum number of open ACOs allowed.
*/
function setAcoPoolMaximumOpenAco(uint256 newMaximumOpenAco) onlyFactoryAdmin external virtual {
_setAcoPoolMaximumOpenAco(newMaximumOpenAco);
}
/**
* @dev Function to set the ACO pool permission.
* Only can be called by the factory admin.
* @param poolAdmin Address of the pool admin.
* @param newPermission The permission to be set.
*/
function setAcoPoolPermission(address poolAdmin, bool newPermission) onlyFactoryAdmin external virtual {
_setAcoPoolPermission(poolAdmin, newPermission);
}
/**
* @dev Function to set the ACO pool strategies permitted.
* Only can be called by the factory admin.
* @param strategy Address of the strategy.
* @param newPermission The permission to be set.
*/
function setAcoPoolStrategyPermission(address strategy, bool newPermission) onlyFactoryAdmin external virtual {
_setAcoPoolStrategyPermission(strategy, newPermission);
}
/**
* @dev Function to change the ACO pools strategy.
* Only can be called by a pool admin.
* @param strategy Address of the strategy to be set.
* @param acoPools Array of ACO pools addresses.
*/
function setStrategyOnAcoPool(address strategy, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setStrategyOnAcoPool(strategy, acoPools);
}
/**
* @dev Function to change the ACO pools base volatilities.
* Only can be called by a pool admin.
* @param baseVolatilities Array of the base volatilities to be set.
* @param acoPools Array of ACO pools addresses.
*/
function setBaseVolatilityOnAcoPool(uint256[] calldata baseVolatilities, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setBaseVolatility.selector, baseVolatilities, acoPools);
}
/**
* @dev Function to change the ACO pools penalties percentages on withdrawing open positions.
* Only can be called by a pool admin.
* @param withdrawOpenPositionPenalties Array of the penalties percentages on withdrawing open positions to be set.
* @param acoPools Array of ACO pools addresses.
*/
function setWithdrawOpenPositionPenaltyOnAcoPool(uint256[] calldata withdrawOpenPositionPenalties, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setWithdrawOpenPositionPenalty.selector, withdrawOpenPositionPenalties, acoPools);
}
/**
* @dev Function to change the ACO pools underlying prices percentages adjust.
* Only can be called by a pool admin.
* @param underlyingPriceAdjustPercentages Array of the underlying prices percentages to be set.
* @param acoPools Array of ACO pools addresses.
*/
function setUnderlyingPriceAdjustPercentageOnAcoPool(uint256[] calldata underlyingPriceAdjustPercentages, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setUnderlyingPriceAdjustPercentage.selector, underlyingPriceAdjustPercentages, acoPools);
}
/**
* @dev Function to change the ACO pools maximum number of open ACOs allowed.
* Only can be called by a pool admin.
* @param maximumOpenAcos Array of the maximum number of open ACOs allowed.
* @param acoPools Array of ACO pools addresses.
*/
function setMaximumOpenAcoOnAcoPool(uint256[] calldata maximumOpenAcos, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setMaximumOpenAco.selector, maximumOpenAcos, acoPools);
}
/**
* @dev Function to change the ACO pools below tolerance prices percentages.
* Only can be called by a pool admin.
* @param tolerancePricesBelow Array of the below tolerance prices percentages to be set.
* @param acoPools Array of ACO pools addresses.
*/
function setTolerancePriceBelowOnAcoPool(uint256[] calldata tolerancePricesBelow, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setTolerancePriceBelow.selector, tolerancePricesBelow, acoPools);
}
/**
* @dev Function to change the ACO pools above tolerance prices percentages.
* Only can be called by a pool admin.
* @param tolerancePricesAbove Array of the above tolerance prices percentages to be set.
* @param acoPools Array of ACO pools addresses.
*/
function setTolerancePriceAboveOnAcoPool(uint256[] calldata tolerancePricesAbove, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setTolerancePriceAbove.selector, tolerancePricesAbove, acoPools);
}
/**
* @dev Function to change the ACO pools minimum expirations.
* Only can be called by a pool admin.
* @param minExpirations Array of the minimum expirations.
* @param acoPools Array of ACO pools addresses.
*/
function setMinExpirationOnAcoPool(uint256[] calldata minExpirations, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setMinExpiration.selector, minExpirations, acoPools);
}
/**
* @dev Function to change the ACO pools maximum expirations.
* Only can be called by a pool admin.
* @param maxExpirations Array of the maximum expirations to be set.
* @param acoPools Array of ACO pools addresses.
*/
function setMaxExpirationOnAcoPool(uint256[] calldata maxExpirations, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setMaxExpiration.selector, maxExpirations, acoPools);
}
/**
* @dev Function to change the ACO pools fee.
* Only can be called by a pool admin.
* @param fees Array of the fees.
* @param acoPools Array of ACO pools addresses.
*/
function setFeeOnAcoPool(uint256[] calldata fees, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolUint256Data(IACOPool2.setFee.selector, fees, acoPools);
}
/**
* @dev Function to change the ACO pools fee destinations.
* Only can be called by a pool admin.
* @param feeDestinations Array of the fee destinations.
* @param acoPools Array of ACO pools addresses.
*/
function setFeeDestinationOnAcoPool(address[] calldata feeDestinations, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolAddressData(IACOPool2.setFeeDestination.selector, feeDestinations, acoPools);
}
/**
* @dev Function to change the ACO pools asset converters.
* Only can be called by a pool admin.
* @param assetConverters Array of the asset converters.
* @param acoPools Array of ACO pools addresses.
*/
function setAssetConverterOnAcoPool(address[] calldata assetConverters, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setAcoPoolAddressData(IACOPool2.setAssetConverter.selector, assetConverters, acoPools);
}
/**
* @dev Function to change the ACO pools ACO creator permission.
* Only can be called by a pool admin.
* @param acoCreator Address of the ACO creator.
* @param permission Permission situation.
* @param acoPools Array of ACO pools addresses.
*/
function setValidAcoCreatorOnAcoPool(address acoCreator, bool permission, address[] calldata acoPools) onlyPoolAdmin external virtual {
_setValidAcoCreatorOnAcoPool(acoCreator, permission, acoPools);
}
/**
* @dev Function to withdraw the ACO pools stucked asset.
* @param asset Address of the asset.
* @param destination Address of the destination.
* @param acoPools Array of ACO pools addresses.
*/
function withdrawStuckAssetOnAcoPool(address asset, address destination, address[] calldata acoPools) onlyPoolAdmin external virtual {
_withdrawStuckAssetOnAcoPool(asset, destination, acoPools);
}
/**
* @dev Internal function to set the factory admin address.
* @param newFactoryAdmin Address of the new factory admin.
*/
function _setFactoryAdmin(address newFactoryAdmin) internal virtual {
require(newFactoryAdmin != address(0), "ACOPoolFactory::_setFactoryAdmin: Invalid factory admin");
emit SetFactoryAdmin(factoryAdmin, newFactoryAdmin);
factoryAdmin = newFactoryAdmin;
}
/**
* @dev Internal function to set the ACO pool implementation address.
* @param newAcoPoolImplementation Address of the new ACO pool implementation.
*/
function _setAcoPoolImplementation(address newAcoPoolImplementation) internal virtual {
require(Address.isContract(newAcoPoolImplementation), "ACOPoolFactory::_setAcoPoolImplementation: Invalid ACO pool implementation");
emit SetAcoPoolImplementation(acoPoolImplementation, newAcoPoolImplementation);
acoPoolImplementation = newAcoPoolImplementation;
}
/**
* @dev Internal function to set the ACO factory address.
* @param newAcoFactory Address of the new ACO token factory.
*/
function _setAcoFactory(address newAcoFactory) internal virtual {
require(Address.isContract(newAcoFactory), "ACOPoolFactory::_setAcoFactory: Invalid ACO factory");
emit SetAcoFactory(acoFactory, newAcoFactory);
acoFactory = newAcoFactory;
}
/**
* @dev Internal function to set the asset converter helper address.
* @param newAssetConverterHelper Address of the new asset converter helper.
*/
function _setAssetConverterHelper(address newAssetConverterHelper) internal virtual {
require(Address.isContract(newAssetConverterHelper), "ACOPoolFactory::_setAssetConverterHelper: Invalid asset converter helper");
emit SetAssetConverterHelper(assetConverterHelper, newAssetConverterHelper);
assetConverterHelper = newAssetConverterHelper;
}
/**
* @dev Internal function to set the Chi Token address.
* @param newChiToken Address of the new Chi Token.
*/
function _setChiToken(address newChiToken) internal virtual {
require(Address.isContract(newChiToken), "ACOPoolFactory::_setChiToken: Invalid Chi Token");
emit SetChiToken(chiToken, newChiToken);
chiToken = newChiToken;
}
/**
* @dev Internal function to set the ACO Pool fee.
* @param newAcoPoolFee Value of the new ACO Pool fee. It is a percentage value (100000 is 100%).
*/
function _setAcoPoolFee(uint256 newAcoPoolFee) internal virtual {
emit SetAcoPoolFee(acoPoolFee, newAcoPoolFee);
acoPoolFee = newAcoPoolFee;
}
/**
* @dev Internal function to set the ACO Pool destination address.
* @param newAcoPoolFeeDestination Address of the new ACO Pool destination.
*/
function _setAcoPoolFeeDestination(address newAcoPoolFeeDestination) internal virtual {
require(newAcoPoolFeeDestination != address(0), "ACOFactory::_setAcoPoolFeeDestination: Invalid ACO Pool fee destination");
emit SetAcoPoolFeeDestination(acoPoolFeeDestination, newAcoPoolFeeDestination);
acoPoolFeeDestination = newAcoPoolFeeDestination;
}
/**
* @dev Internal function to set the ACO Pool penalty percentage on withdrawing open positions.
* @param newWithdrawOpenPositionPenalty Value of the new ACO Pool penalty percentage on withdrawing open positions. It is a percentage value (100000 is 100%).
*/
function _setAcoPoolWithdrawOpenPositionPenalty(uint256 newWithdrawOpenPositionPenalty) internal virtual {
emit SetAcoPoolWithdrawOpenPositionPenalty(acoPoolWithdrawOpenPositionPenalty, newWithdrawOpenPositionPenalty);
acoPoolWithdrawOpenPositionPenalty = newWithdrawOpenPositionPenalty;
}
/**
* @dev Internal function to set the ACO Pool underlying price percentage adjust.
* @param newUnderlyingPriceAdjustPercentage Value of the new ACO Pool underlying price percentage adjust. It is a percentage value (100000 is 100%).
*/
function _setAcoPoolUnderlyingPriceAdjustPercentage(uint256 newUnderlyingPriceAdjustPercentage) internal virtual {
emit SetAcoPoolUnderlyingPriceAdjustPercentage(acoPoolUnderlyingPriceAdjustPercentage, newUnderlyingPriceAdjustPercentage);
acoPoolUnderlyingPriceAdjustPercentage = newUnderlyingPriceAdjustPercentage;
}
/**
* @dev Internal function to set the ACO Pool maximum number of open ACOs allowed.
* @param newMaximumOpenAco Value of the new ACO Pool maximum number of open ACOs allowed.
*/
function _setAcoPoolMaximumOpenAco(uint256 newMaximumOpenAco) internal virtual {
emit SetAcoPoolMaximumOpenAco(acoPoolMaximumOpenAco, newMaximumOpenAco);
acoPoolMaximumOpenAco = newMaximumOpenAco;
}
/**
* @dev Internal function to set the ACO pool permission.
* @param poolAdmin Address of the pool admin.
* @param newPermission The permission to be set.
*/
function _setAcoPoolPermission(address poolAdmin, bool newPermission) internal virtual {
emit SetAcoPoolPermission(poolAdmin, poolAdminPermission[poolAdmin], newPermission);
poolAdminPermission[poolAdmin] = newPermission;
}
/**
* @dev Internal function to set the ACO pool strategies permitted.
* @param strategy Address of the strategy.
* @param newPermission The permission to be set.
*/
function _setAcoPoolStrategyPermission(address strategy, bool newPermission) internal virtual {
require(Address.isContract(strategy), "ACOPoolFactory::_setAcoPoolStrategy: Invalid strategy");
emit SetStrategyPermission(strategy, strategyPermitted[strategy], newPermission);
strategyPermitted[strategy] = newPermission;
}
/**
* @dev Internal function to validate strategy.
* @param strategy Address of the strategy.
*/
function _validateStrategy(address strategy) view internal virtual {
require(strategyPermitted[strategy], "ACOPoolFactory::_validateStrategy: Invalid strategy");
}
/**
* @dev Internal function to change the ACO pools strategy.
* @param strategy Address of the strategy to be set.
* @param acoPools Array of ACO pools addresses.
*/
function _setStrategyOnAcoPool(address strategy, address[] memory acoPools) internal virtual {
_validateStrategy(strategy);
for (uint256 i = 0; i < acoPools.length; ++i) {
IACOPool2(acoPools[i]).setStrategy(strategy);
}
}
/**
* @dev Internal function to change the ACO pools ACO creator permission.
* @param acoCreator Address of the ACO creator.
* @param permission Permission situation.
* @param acoPools Array of ACO pools addresses.
*/
function _setValidAcoCreatorOnAcoPool(address acoCreator, bool permission, address[] memory acoPools) internal virtual {
for (uint256 i = 0; i < acoPools.length; ++i) {
IACOPool2(acoPools[i]).setValidAcoCreator(acoCreator, permission);
}
}
/**
* @dev Internal function to withdraw the ACO pools stucked asset.
* @param asset Address of the asset.
* @param destination Address of the destination.
* @param acoPools Array of ACO pools addresses.
*/
function _withdrawStuckAssetOnAcoPool(address asset, address destination, address[] memory acoPools) internal virtual {
for (uint256 i = 0; i < acoPools.length; ++i) {
IACOPool2(acoPools[i]).withdrawStuckToken(asset, destination);
}
}
/**
* @dev Internal function to change the ACO pools an uint256 data.
* @param selector Function selector to be called on the ACO pool.
* @param numbers Array of the numbers to be set.
* @param acoPools Array of ACO pools addresses.
*/
function _setAcoPoolUint256Data(bytes4 selector, uint256[] memory numbers, address[] memory acoPools) internal virtual {
require(numbers.length == acoPools.length, "ACOPoolFactory::_setAcoPoolUint256Data: Invalid arguments");
for (uint256 i = 0; i < acoPools.length; ++i) {
(bool success,) = acoPools[i].call(abi.encodeWithSelector(selector, numbers[i]));
require(success, "ACOPoolFactory::_setAcoPoolUint256Data");
}
}
/**
* @dev Internal function to change the ACO pools an address data.
* @param selector Function selector to be called on the ACO pool.
* @param addresses Array of the addresses to be set.
* @param acoPools Array of ACO pools addresses.
*/
function _setAcoPoolAddressData(bytes4 selector, address[] memory addresses, address[] memory acoPools) internal virtual {
require(addresses.length == acoPools.length, "ACOPoolFactory::_setAcoPoolAddressData: Invalid arguments");
for (uint256 i = 0; i < acoPools.length; ++i) {
(bool success,) = acoPools[i].call(abi.encodeWithSelector(selector, addresses[i]));
require(success, "ACOPoolFactory::_setAcoPoolAddressData");
}
}
/**
* @dev Internal function to create a new ACO pool.
* @param initData Data to initialize o ACO Pool.
* @return Address of the new minimal proxy deployed for the ACO pool.
*/
function _createAcoPool(IACOPool2.InitData memory initData) internal virtual returns(address) {
address acoPool = _deployAcoPool(initData);
acoPoolBasicData[acoPool] = ACOPoolBasicData(initData.underlying, initData.strikeAsset, initData.isCall);
emit NewAcoPool(
initData.underlying,
initData.strikeAsset,
initData.isCall,
acoPool,
acoPoolImplementation
);
return acoPool;
}
/**
* @dev Internal function to deploy a minimal proxy using ACO pool implementation.
* @param initData Data to initialize o ACO Pool.
* @return Address of the new minimal proxy deployed for the ACO pool.
*/
function _deployAcoPool(IACOPool2.InitData memory initData) internal virtual returns(address) {
bytes20 implentationBytes = bytes20(acoPoolImplementation);
address proxy;
assembly {
let clone := mload(0x40)
mstore(clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(clone, 0x14), implentationBytes)
mstore(add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
proxy := create(0, clone, 0x37)
}
IACOPool2(proxy).init(initData);
return proxy;
}
}
|
* @dev Function to set the ACO pool strategies permitted. Only can be called by the factory admin. @param strategy Address of the strategy. @param newPermission The permission to be set./
|
function setAcoPoolStrategyPermission(address strategy, bool newPermission) onlyFactoryAdmin external virtual {
_setAcoPoolStrategyPermission(strategy, newPermission);
}
| 128,870
|
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pragma solidity ^0.4.11;
/*
This FYN token contract is derived from the vSlice ICO contract, based on the ERC20 token contract.
Additional functionality has been integrated:
* the function mintTokens() only callable from wallet, which makes use of the currentSwapRate() and safeToAdd() helpers
* the function mintReserve() only callable from wallet, which at the end of the crowdsale will allow the owners to claim the unsold tokens
* the function stopToken() only callable from wallet, which in an emergency, will trigger a complete and irrecoverable shutdown of the token
* Contract tokens are locked when created, and no tokens including pre-mine can be moved until the crowdsale is over.
*/
// ERC20 Token Standard Interface
// https://github.com/ethereum/EIPs/issues/20
contract ERC20 {
function totalSupply() constant returns (uint);
function balanceOf(address who) constant returns (uint);
function allowance(address owner, address spender) constant returns (uint);
function transfer(address to, uint value) returns (bool ok);
function transferFrom(address from, address to, uint value) returns (bool ok);
function approve(address spender, uint value) returns (bool ok);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract Token is ERC20 {
string public constant name = "FundYourselfNow Token";
string public constant symbol = "FYN";
uint8 public constant decimals = 18; // 18 is the most common number of decimal places
uint256 public tokenCap = 12500000e18; // 12.5 million FYN cap
address public walletAddress;
uint256 public creationTime;
bool public transferStop;
mapping( address => uint ) _balances;
mapping( address => mapping( address => uint ) ) _approvals;
uint _supply;
event TokenMint(address newTokenHolder, uint amountOfTokens);
event TokenSwapOver();
event EmergencyStopActivated();
modifier onlyFromWallet {
if (msg.sender != walletAddress) throw;
_;
}
// Check if transfer should stop
modifier checkTransferStop {
if (transferStop == true) throw;
_;
}
/**
*
* Fix for the ERC20 short address attack
*
* http://vessenes.com/the-erc20-short-address-attack-explained/
*/
modifier onlyPayloadSize(uint size) {
if (!(msg.data.length == size + 4)) throw;
_;
}
function Token( uint initial_balance, address wallet, uint256 crowdsaleTime) {
_balances[msg.sender] = initial_balance;
_supply = initial_balance;
walletAddress = wallet;
creationTime = crowdsaleTime;
transferStop = true;
}
function totalSupply() constant returns (uint supply) {
return _supply;
}
function balanceOf( address who ) constant returns (uint value) {
return _balances[who];
}
function allowance(address owner, address spender) constant returns (uint _allowance) {
return _approvals[owner][spender];
}
// A helper to notify if overflow occurs
function safeToAdd(uint a, uint b) private constant returns (bool) {
return (a + b >= a && a + b >= b);
}
// A helper to notify if overflow occurs for multiplication
function safeToMultiply(uint _a, uint _b) private constant returns (bool) {
return (_b == 0 || ((_a * _b) / _b) == _a);
}
// A helper to notify if underflow occurs for subtraction
function safeToSub(uint a, uint b) private constant returns (bool) {
return (a >= b);
}
function transfer( address to, uint value)
checkTransferStop
onlyPayloadSize(2 * 32)
returns (bool ok) {
if (to == walletAddress) throw; // Reject transfers to wallet (wallet cannot interact with token contract)
if( _balances[msg.sender] < value ) {
throw;
}
if( !safeToAdd(_balances[to], value) ) {
throw;
}
_balances[msg.sender] -= value;
_balances[to] += value;
Transfer( msg.sender, to, value );
return true;
}
function transferFrom( address from, address to, uint value)
checkTransferStop
returns (bool ok) {
if (to == walletAddress) throw; // Reject transfers to wallet (wallet cannot interact with token contract)
// if you don't have enough balance, throw
if( _balances[from] < value ) {
throw;
}
// if you don't have approval, throw
if( _approvals[from][msg.sender] < value ) {
throw;
}
if( !safeToAdd(_balances[to], value) ) {
throw;
}
// transfer and return true
_approvals[from][msg.sender] -= value;
_balances[from] -= value;
_balances[to] += value;
Transfer( from, to, value );
return true;
}
function approve(address spender, uint value)
checkTransferStop
returns (bool ok) {
// 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
//
// Note that this doesn't prevent attacks; the user will have to personally
// check to ensure that the token count has not changed, before issuing
// a new approval. Increment/decrement is not commonly spec-ed, and
// changing to a check-my-approvals-before-changing would require user
// to find out his current approval for spender and change expected
// behaviour for ERC20.
if ((value!=0) && (_approvals[msg.sender][spender] !=0)) throw;
_approvals[msg.sender][spender] = value;
Approval( msg.sender, spender, value );
return true;
}
// The function currentSwapRate() returns the current exchange rate
// between FYN tokens and Ether during the token swap period
function currentSwapRate() constant returns(uint) {
uint presalePeriod = 3 days;
uint presaleTransitionWindow = 3 hours;
if (creationTime + presalePeriod > now) { // 2017-06-10 11am GMT+8
return 140; // Presale Window is triggered by both time and "Start Token Swap / End Token Swap". Restricted to announement range and basic testing.
}
else if (creationTime + presalePeriod + 3 weeks > now) { // 2017-06-13 11am GMT+8, but we will only Start Token Swap at 2pm
return 120;
}
else if (creationTime + presalePeriod + 6 weeks + 6 days + 3 hours + presaleTransitionWindow + 1 days > now) { // 2017-07-31 5pm GMT+8 (+1 day window )
// 1 day buffer to allow one final transaction from anyone to close everything
// otherwise wallet will receive ether but send 0 tokens
// we cannot throw as we will lose the state change to start swappability of tokens
// This is actually just a price guide, actual closing is done at the Wallet level
return 100;
}
else {
return 0;
}
}
// The function mintTokens is only usable by the chosen wallet
// contract to mint a number of tokens proportional to the
// amount of ether sent to the wallet contract. The function
// can only be called during the tokenswap period
function mintTokens(address newTokenHolder, uint etherAmount)
external
onlyFromWallet {
if (!safeToMultiply(currentSwapRate(), etherAmount)) throw;
uint tokensAmount = currentSwapRate() * etherAmount;
if(!safeToAdd(_balances[newTokenHolder],tokensAmount )) throw;
if(!safeToAdd(_supply,tokensAmount)) throw;
if ((_supply + tokensAmount) > tokenCap) throw;
_balances[newTokenHolder] += tokensAmount;
_supply += tokensAmount;
TokenMint(newTokenHolder, tokensAmount);
}
function mintReserve(address beneficiary)
external
onlyFromWallet {
if (tokenCap <= _supply) throw;
if(!safeToSub(tokenCap,_supply)) throw;
uint tokensAmount = tokenCap - _supply;
if(!safeToAdd(_balances[beneficiary], tokensAmount )) throw;
if(!safeToAdd(_supply,tokensAmount)) throw;
_balances[beneficiary] += tokensAmount;
_supply += tokensAmount;
TokenMint(beneficiary, tokensAmount);
}
// The function disableTokenSwapLock() is called by the wallet
// contract once the token swap has reached its end conditions
function disableTokenSwapLock()
external
onlyFromWallet {
transferStop = false;
TokenSwapOver();
}
// Once activated, a new token contract will need to be created, mirroring the current token holdings.
function stopToken() onlyFromWallet {
transferStop = true;
EmergencyStopActivated();
}
}
/*
The standard Wallet contract, retrievable at
https://github.com/ethereum/dapp-bin/blob/master/wallet/wallet.sol has been
modified to include additional functionality, in particular:
* An additional parent of wallet contract called tokenswap, implementing almost
all the changes:
- Functions for starting and stopping the tokenswap
- A set-only-once function for the token contract
- buyTokens(), which calls mintTokens() in the token contract
- Modifiers for enforcing tokenswap time limits, max ether cap, and max token cap
- withdrawEther(), for withdrawing unsold tokens after time cap
* the wallet fallback function calls the buyTokens function
* the wallet contract cannot selfdestruct during the tokenswap
*/
contract multiowned {
// TYPES
// struct for the status of a pending operation.
struct PendingState {
uint yetNeeded;
uint ownersDone;
uint index;
}
// EVENTS
// this contract only has six types of events: it can accept a confirmation, in which case
// we record owner and operation (hash) alongside it.
event Confirmation(address owner, bytes32 operation);
event Revoke(address owner, bytes32 operation);
// some others are in the case of an owner changing.
event OwnerChanged(address oldOwner, address newOwner);
event OwnerAdded(address newOwner);
event OwnerRemoved(address oldOwner);
// the last one is emitted if the required signatures change
event RequirementChanged(uint newRequirement);
// MODIFIERS
// simple single-sig function modifier.
modifier onlyowner {
if (isOwner(msg.sender))
_;
}
// multi-sig function modifier: the operation must have an intrinsic hash in order
// that later attempts can be realised as the same underlying operation and
// thus count as confirmations.
modifier onlymanyowners(bytes32 _operation) {
if (confirmAndCheck(_operation))
_;
}
// METHODS
// constructor is given number of sigs required to do protected "onlymanyowners" transactions
// as well as the selection of addresses capable of confirming them.
function multiowned(address[] _owners, uint _required) {
m_numOwners = _owners.length + 1;
m_owners[1] = uint(msg.sender);
m_ownerIndex[uint(msg.sender)] = 1;
for (uint i = 0; i < _owners.length; ++i)
{
m_owners[2 + i] = uint(_owners[i]);
m_ownerIndex[uint(_owners[i])] = 2 + i;
}
m_required = _required;
}
// Revokes a prior confirmation of the given operation
function revoke(bytes32 _operation) external {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
// make sure they're an owner
if (ownerIndex == 0) return;
uint ownerIndexBit = 2**ownerIndex;
var pending = m_pending[_operation];
if (pending.ownersDone & ownerIndexBit > 0) {
pending.yetNeeded++;
pending.ownersDone -= ownerIndexBit;
Revoke(msg.sender, _operation);
}
}
// Replaces an owner `_from` with another `_to`.
function changeOwner(address _from, address _to) onlymanyowners(sha3(msg.data)) external {
if (isOwner(_to)) return;
uint ownerIndex = m_ownerIndex[uint(_from)];
if (ownerIndex == 0) return;
clearPending();
m_owners[ownerIndex] = uint(_to);
m_ownerIndex[uint(_from)] = 0;
m_ownerIndex[uint(_to)] = ownerIndex;
OwnerChanged(_from, _to);
}
function addOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
if (isOwner(_owner)) return;
clearPending();
if (m_numOwners >= c_maxOwners)
reorganizeOwners();
if (m_numOwners >= c_maxOwners)
return;
m_numOwners++;
m_owners[m_numOwners] = uint(_owner);
m_ownerIndex[uint(_owner)] = m_numOwners;
OwnerAdded(_owner);
}
function removeOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
uint ownerIndex = m_ownerIndex[uint(_owner)];
if (ownerIndex == 0) return;
if (m_required > m_numOwners - 1) return;
m_owners[ownerIndex] = 0;
m_ownerIndex[uint(_owner)] = 0;
clearPending();
reorganizeOwners(); //make sure m_numOwner is equal to the number of owners and always points to the optimal free slot
OwnerRemoved(_owner);
}
function changeRequirement(uint _newRequired) onlymanyowners(sha3(msg.data)) external {
if (_newRequired > m_numOwners) return;
m_required = _newRequired;
clearPending();
RequirementChanged(_newRequired);
}
// Gets an owner by 0-indexed position (using numOwners as the count)
function getOwner(uint ownerIndex) external constant returns (address) {
return address(m_owners[ownerIndex + 1]);
}
function isOwner(address _addr) returns (bool) {
return m_ownerIndex[uint(_addr)] > 0;
}
function hasConfirmed(bytes32 _operation, address _owner) constant returns (bool) {
var pending = m_pending[_operation];
uint ownerIndex = m_ownerIndex[uint(_owner)];
// make sure they're an owner
if (ownerIndex == 0) return false;
// determine the bit to set for this owner.
uint ownerIndexBit = 2**ownerIndex;
return !(pending.ownersDone & ownerIndexBit == 0);
}
// INTERNAL METHODS
function confirmAndCheck(bytes32 _operation) internal returns (bool) {
// determine what index the present sender is:
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
// make sure they're an owner
if (ownerIndex == 0) return;
var pending = m_pending[_operation];
// if we're not yet working on this operation, switch over and reset the confirmation status.
if (pending.yetNeeded == 0) {
// reset count of confirmations needed.
pending.yetNeeded = m_required;
// reset which owners have confirmed (none) - set our bitmap to 0.
pending.ownersDone = 0;
pending.index = m_pendingIndex.length++;
m_pendingIndex[pending.index] = _operation;
}
// determine the bit to set for this owner.
uint ownerIndexBit = 2**ownerIndex;
// make sure we (the message sender) haven't confirmed this operation previously.
if (pending.ownersDone & ownerIndexBit == 0) {
Confirmation(msg.sender, _operation);
// ok - check if count is enough to go ahead.
if (pending.yetNeeded <= 1) {
// enough confirmations: reset and run interior.
delete m_pendingIndex[m_pending[_operation].index];
delete m_pending[_operation];
return true;
}
else
{
// not enough: record that this owner in particular confirmed.
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
}
}
}
function reorganizeOwners() private {
uint free = 1;
while (free < m_numOwners)
{
while (free < m_numOwners && m_owners[free] != 0) free++;
while (m_numOwners > 1 && m_owners[m_numOwners] == 0) m_numOwners--;
if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0)
{
m_owners[free] = m_owners[m_numOwners];
m_ownerIndex[m_owners[free]] = free;
m_owners[m_numOwners] = 0;
}
}
}
function clearPending() internal {
uint length = m_pendingIndex.length;
for (uint i = 0; i < length; ++i)
if (m_pendingIndex[i] != 0)
delete m_pending[m_pendingIndex[i]];
delete m_pendingIndex;
}
// FIELDS
// the number of owners that must confirm the same operation before it is run.
uint public m_required;
// pointer used to find a free slot in m_owners
uint public m_numOwners;
// list of owners
uint[256] m_owners;
uint constant c_maxOwners = 250;
// index on the list of owners to allow reverse lookup
mapping(uint => uint) m_ownerIndex;
// the ongoing operations.
mapping(bytes32 => PendingState) m_pending;
bytes32[] m_pendingIndex;
}
// inheritable "property" contract that enables methods to be protected by placing a linear limit (specifiable)
// on a particular resource per calendar day. is multiowned to allow the limit to be altered. resource that method
// uses is specified in the modifier.
contract daylimit is multiowned {
// MODIFIERS
// simple modifier for daily limit.
modifier limitedDaily(uint _value) {
if (underLimit(_value))
_;
}
// METHODS
// constructor - stores initial daily limit and records the present day's index.
function daylimit(uint _limit) {
m_dailyLimit = _limit;
m_lastDay = today();
}
// (re)sets the daily limit. needs many of the owners to confirm. doesn't alter the amount already spent today.
function setDailyLimit(uint _newLimit) onlymanyowners(sha3(msg.data)) external {
m_dailyLimit = _newLimit;
}
// resets the amount already spent today. needs many of the owners to confirm.
function resetSpentToday() onlymanyowners(sha3(msg.data)) external {
m_spentToday = 0;
}
// INTERNAL METHODS
// checks to see if there is at least `_value` left from the daily limit today. if there is, subtracts it and
// returns true. otherwise just returns false.
function underLimit(uint _value) internal onlyowner returns (bool) {
// reset the spend limit if we're on a different day to last time.
if (today() > m_lastDay) {
m_spentToday = 0;
m_lastDay = today();
}
// check if it's sending nothing (with or without data). This needs Multitransact
if (_value == 0) return false;
// check to see if there's enough left - if so, subtract and return true.
// overflow protection // dailyLimit check
if (m_spentToday + _value >= m_spentToday && m_spentToday + _value <= m_dailyLimit) {
m_spentToday += _value;
return true;
}
return false;
}
// determines today's index.
function today() private constant returns (uint) { return now / 1 days; }
// FIELDS
uint public m_dailyLimit;
uint public m_spentToday;
uint public m_lastDay;
}
// interface contract for multisig proxy contracts; see below for docs.
contract multisig {
// EVENTS
// logged events:
// Funds has arrived into the wallet (record how much).
event Deposit(address _from, uint value);
// Single transaction going out of the wallet (record who signed for it, how much, and to whom it's going).
event SingleTransact(address owner, uint value, address to, bytes data);
// Multi-sig transaction going out of the wallet (record who signed for it last, the operation hash, how much, and to whom it's going).
event MultiTransact(address owner, bytes32 operation, uint value, address to, bytes data);
// Confirmation still needed for a transaction.
event ConfirmationNeeded(bytes32 operation, address initiator, uint value, address to, bytes data);
// FUNCTIONS
// TODO: document
function changeOwner(address _from, address _to) external;
function execute(address _to, uint _value, bytes _data) external returns (bytes32);
function confirm(bytes32 _h) returns (bool);
}
contract tokenswap is multisig, multiowned {
Token public tokenCtr;
bool public tokenSwap;
uint public constant PRESALE_LENGTH = 3 days;
uint public constant TRANSITION_WINDOW = 3 hours; // We will turn on tokenSwap in this period and it will 120 FYN / ETH
uint public constant SWAP_LENGTH = PRESALE_LENGTH + TRANSITION_WINDOW + 6 weeks + 6 days + 3 hours;
uint public constant MAX_ETH = 75000 ether; // Hard cap, capped otherwise by total tokens sold (max 7.5M FYN)
uint public amountRaised;
modifier isUnderPresaleMinimum {
if (tokenCtr.creationTime() + PRESALE_LENGTH > now) {
if (msg.value < 20 ether) throw;
}
_;
}
modifier isZeroValue {
if (msg.value == 0) throw;
_;
}
modifier isOverCap {
if (amountRaised + msg.value > MAX_ETH) throw;
_;
}
modifier isOverTokenCap {
if (!safeToMultiply(tokenCtr.currentSwapRate(), msg.value)) throw;
uint tokensAmount = tokenCtr.currentSwapRate() * msg.value;
if(!safeToAdd(tokenCtr.totalSupply(),tokensAmount)) throw;
if (tokenCtr.totalSupply() + tokensAmount > tokenCtr.tokenCap()) throw;
_;
}
modifier isSwapStopped {
if (!tokenSwap) throw;
_;
}
modifier areConditionsSatisfied {
_;
// End token swap if sale period ended
// We can't throw to reverse the amount sent in or we will lose state
// , so we will accept it even though if it is after crowdsale
if (tokenCtr.creationTime() + SWAP_LENGTH < now) {
tokenCtr.disableTokenSwapLock();
tokenSwap = false;
}
// Check if cap has been reached in this tx
if (amountRaised == MAX_ETH) {
tokenCtr.disableTokenSwapLock();
tokenSwap = false;
}
// Check if token cap has been reach in this tx
if (tokenCtr.totalSupply() == tokenCtr.tokenCap()) {
tokenCtr.disableTokenSwapLock();
tokenSwap = false;
}
}
// A helper to notify if overflow occurs for addition
function safeToAdd(uint a, uint b) private constant returns (bool) {
return (a + b >= a && a + b >= b);
}
// A helper to notify if overflow occurs for multiplication
function safeToMultiply(uint _a, uint _b) private constant returns (bool) {
return (_b == 0 || ((_a * _b) / _b) == _a);
}
function startTokenSwap() onlyowner {
tokenSwap = true;
}
function stopTokenSwap() onlyowner {
tokenSwap = false;
}
function setTokenContract(address newTokenContractAddr) onlyowner {
if (newTokenContractAddr == address(0x0)) throw;
// Allow setting only once
if (tokenCtr != address(0x0)) throw;
tokenCtr = Token(newTokenContractAddr);
}
function buyTokens(address _beneficiary)
payable
isUnderPresaleMinimum
isZeroValue
isOverCap
isOverTokenCap
isSwapStopped
areConditionsSatisfied {
Deposit(msg.sender, msg.value);
tokenCtr.mintTokens(_beneficiary, msg.value);
if (!safeToAdd(amountRaised, msg.value)) throw;
amountRaised += msg.value;
}
function withdrawReserve(address _beneficiary) onlyowner {
if (tokenCtr.creationTime() + SWAP_LENGTH < now) {
tokenCtr.mintReserve(_beneficiary);
}
}
}
// usage:
// bytes32 h = Wallet(w).from(oneOwner).transact(to, value, data);
// Wallet(w).from(anotherOwner).confirm(h);
contract Wallet is multisig, multiowned, daylimit, tokenswap {
// TYPES
// Transaction structure to remember details of transaction lest it need be saved for a later call.
struct Transaction {
address to;
uint value;
bytes data;
}
// METHODS
// constructor - just pass on the owner array to the multiowned and
// the limit to daylimit
function Wallet(address[] _owners, uint _required, uint _daylimit)
multiowned(_owners, _required) daylimit(_daylimit) {
}
// kills the contract sending everything to `_to`.
function kill(address _to) onlymanyowners(sha3(msg.data)) external {
// ensure owners can't prematurely stop token sale
if (tokenSwap) throw;
// ensure owners can't kill wallet without stopping token
// otherwise token can never be stopped
if (tokenCtr.transferStop() == false) throw;
suicide(_to);
}
// Activates Emergency Stop for Token
function stopToken() onlymanyowners(sha3(msg.data)) external {
tokenCtr.stopToken();
}
// gets called when no other function matches
function()
payable {
buyTokens(msg.sender);
}
// Outside-visible transact entry point. Executes transaction immediately if below daily spend limit.
// If not, goes into multisig process. We provide a hash on return to allow the sender to provide
// shortcuts for the other confirmations (allowing them to avoid replicating the _to, _value
// and _data arguments). They still get the option of using them if they want, anyways.
function execute(address _to, uint _value, bytes _data) external onlyowner returns (bytes32 _r) {
// Disallow the wallet contract from calling token contract once it's set
// so tokens can't be minted arbitrarily once the sale starts.
// Tokens can be minted for premine before the sale opens and tokenCtr is set.
if (_to == address(tokenCtr)) throw;
// first, take the opportunity to check that we're under the daily limit.
if (underLimit(_value)) {
SingleTransact(msg.sender, _value, _to, _data);
// yes - just execute the call.
if(!_to.call.value(_value)(_data))
return 0;
}
// determine our operation hash.
_r = sha3(msg.data, block.number);
if (!confirm(_r) && m_txs[_r].to == 0) {
m_txs[_r].to = _to;
m_txs[_r].value = _value;
m_txs[_r].data = _data;
ConfirmationNeeded(_r, msg.sender, _value, _to, _data);
}
}
// confirm a transaction through just the hash. we use the previous transactions map, m_txs, in order
// to determine the body of the transaction from the hash provided.
function confirm(bytes32 _h) onlymanyowners(_h) returns (bool) {
if (m_txs[_h].to != 0) {
if (!m_txs[_h].to.call.value(m_txs[_h].value)(m_txs[_h].data)) // Bugfix: If successful, MultiTransact event should fire; if unsuccessful, we should throw
throw;
MultiTransact(msg.sender, _h, m_txs[_h].value, m_txs[_h].to, m_txs[_h].data);
delete m_txs[_h];
return true;
}
}
// INTERNAL METHODS
function clearPending() internal {
uint length = m_pendingIndex.length;
for (uint i = 0; i < length; ++i)
delete m_txs[m_pendingIndex[i]];
super.clearPending();
}
// FIELDS
// pending transactions we have at present.
mapping (bytes32 => Transaction) m_txs;
}
|
An additional parent of wallet contract called tokenswap, implementing almost the wallet fallback function calls the buyTokens function the wallet contract cannot selfdestruct during the tokenswap/ TYPES struct for the status of a pending operation.
|
contract multiowned {
function mintTokens(address newTokenHolder, uint etherAmount)
external
}
function mintReserve(address beneficiary)
external
}
function disableTokenSwapLock()
external
}
}
}
The standard Wallet contract, retrievable at
modified to include additional functionality, in particular:
all the changes:
- Functions for starting and stopping the tokenswap
- A set-only-once function for the token contract
- buyTokens(), which calls mintTokens() in the token contract
- Modifiers for enforcing tokenswap time limits, max ether cap, and max token cap
- withdrawEther(), for withdrawing unsold tokens after time cap
struct PendingState {
uint yetNeeded;
uint ownersDone;
uint index;
}
event Revoke(address owner, bytes32 operation);
event OwnerAdded(address newOwner);
event OwnerRemoved(address oldOwner);
event Confirmation(address owner, bytes32 operation);
event OwnerChanged(address oldOwner, address newOwner);
event RequirementChanged(uint newRequirement);
modifier onlyowner {
if (isOwner(msg.sender))
_;
}
modifier onlymanyowners(bytes32 _operation) {
if (confirmAndCheck(_operation))
_;
}
function multiowned(address[] _owners, uint _required) {
m_numOwners = _owners.length + 1;
m_owners[1] = uint(msg.sender);
m_ownerIndex[uint(msg.sender)] = 1;
for (uint i = 0; i < _owners.length; ++i)
{
m_owners[2 + i] = uint(_owners[i]);
m_ownerIndex[uint(_owners[i])] = 2 + i;
}
m_required = _required;
}
function multiowned(address[] _owners, uint _required) {
m_numOwners = _owners.length + 1;
m_owners[1] = uint(msg.sender);
m_ownerIndex[uint(msg.sender)] = 1;
for (uint i = 0; i < _owners.length; ++i)
{
m_owners[2 + i] = uint(_owners[i]);
m_ownerIndex[uint(_owners[i])] = 2 + i;
}
m_required = _required;
}
function revoke(bytes32 _operation) external {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
if (ownerIndex == 0) return;
uint ownerIndexBit = 2**ownerIndex;
var pending = m_pending[_operation];
if (pending.ownersDone & ownerIndexBit > 0) {
pending.yetNeeded++;
pending.ownersDone -= ownerIndexBit;
Revoke(msg.sender, _operation);
}
}
function revoke(bytes32 _operation) external {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
if (ownerIndex == 0) return;
uint ownerIndexBit = 2**ownerIndex;
var pending = m_pending[_operation];
if (pending.ownersDone & ownerIndexBit > 0) {
pending.yetNeeded++;
pending.ownersDone -= ownerIndexBit;
Revoke(msg.sender, _operation);
}
}
function changeOwner(address _from, address _to) onlymanyowners(sha3(msg.data)) external {
if (isOwner(_to)) return;
uint ownerIndex = m_ownerIndex[uint(_from)];
if (ownerIndex == 0) return;
clearPending();
m_owners[ownerIndex] = uint(_to);
m_ownerIndex[uint(_from)] = 0;
m_ownerIndex[uint(_to)] = ownerIndex;
OwnerChanged(_from, _to);
}
function addOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
if (isOwner(_owner)) return;
clearPending();
if (m_numOwners >= c_maxOwners)
reorganizeOwners();
if (m_numOwners >= c_maxOwners)
return;
m_numOwners++;
m_owners[m_numOwners] = uint(_owner);
m_ownerIndex[uint(_owner)] = m_numOwners;
OwnerAdded(_owner);
}
function removeOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
uint ownerIndex = m_ownerIndex[uint(_owner)];
if (ownerIndex == 0) return;
if (m_required > m_numOwners - 1) return;
m_owners[ownerIndex] = 0;
m_ownerIndex[uint(_owner)] = 0;
clearPending();
OwnerRemoved(_owner);
}
function changeRequirement(uint _newRequired) onlymanyowners(sha3(msg.data)) external {
if (_newRequired > m_numOwners) return;
m_required = _newRequired;
clearPending();
RequirementChanged(_newRequired);
}
function getOwner(uint ownerIndex) external constant returns (address) {
return address(m_owners[ownerIndex + 1]);
}
function isOwner(address _addr) returns (bool) {
return m_ownerIndex[uint(_addr)] > 0;
}
function hasConfirmed(bytes32 _operation, address _owner) constant returns (bool) {
var pending = m_pending[_operation];
uint ownerIndex = m_ownerIndex[uint(_owner)];
if (ownerIndex == 0) return false;
uint ownerIndexBit = 2**ownerIndex;
return !(pending.ownersDone & ownerIndexBit == 0);
}
function confirmAndCheck(bytes32 _operation) internal returns (bool) {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
if (ownerIndex == 0) return;
var pending = m_pending[_operation];
if (pending.yetNeeded == 0) {
pending.yetNeeded = m_required;
pending.ownersDone = 0;
pending.index = m_pendingIndex.length++;
m_pendingIndex[pending.index] = _operation;
}
if (pending.ownersDone & ownerIndexBit == 0) {
Confirmation(msg.sender, _operation);
if (pending.yetNeeded <= 1) {
delete m_pendingIndex[m_pending[_operation].index];
delete m_pending[_operation];
return true;
}
else
{
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
}
}
}
function confirmAndCheck(bytes32 _operation) internal returns (bool) {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
if (ownerIndex == 0) return;
var pending = m_pending[_operation];
if (pending.yetNeeded == 0) {
pending.yetNeeded = m_required;
pending.ownersDone = 0;
pending.index = m_pendingIndex.length++;
m_pendingIndex[pending.index] = _operation;
}
if (pending.ownersDone & ownerIndexBit == 0) {
Confirmation(msg.sender, _operation);
if (pending.yetNeeded <= 1) {
delete m_pendingIndex[m_pending[_operation].index];
delete m_pending[_operation];
return true;
}
else
{
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
}
}
}
uint ownerIndexBit = 2**ownerIndex;
function confirmAndCheck(bytes32 _operation) internal returns (bool) {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
if (ownerIndex == 0) return;
var pending = m_pending[_operation];
if (pending.yetNeeded == 0) {
pending.yetNeeded = m_required;
pending.ownersDone = 0;
pending.index = m_pendingIndex.length++;
m_pendingIndex[pending.index] = _operation;
}
if (pending.ownersDone & ownerIndexBit == 0) {
Confirmation(msg.sender, _operation);
if (pending.yetNeeded <= 1) {
delete m_pendingIndex[m_pending[_operation].index];
delete m_pending[_operation];
return true;
}
else
{
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
}
}
}
function confirmAndCheck(bytes32 _operation) internal returns (bool) {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
if (ownerIndex == 0) return;
var pending = m_pending[_operation];
if (pending.yetNeeded == 0) {
pending.yetNeeded = m_required;
pending.ownersDone = 0;
pending.index = m_pendingIndex.length++;
m_pendingIndex[pending.index] = _operation;
}
if (pending.ownersDone & ownerIndexBit == 0) {
Confirmation(msg.sender, _operation);
if (pending.yetNeeded <= 1) {
delete m_pendingIndex[m_pending[_operation].index];
delete m_pending[_operation];
return true;
}
else
{
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
}
}
}
function confirmAndCheck(bytes32 _operation) internal returns (bool) {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
if (ownerIndex == 0) return;
var pending = m_pending[_operation];
if (pending.yetNeeded == 0) {
pending.yetNeeded = m_required;
pending.ownersDone = 0;
pending.index = m_pendingIndex.length++;
m_pendingIndex[pending.index] = _operation;
}
if (pending.ownersDone & ownerIndexBit == 0) {
Confirmation(msg.sender, _operation);
if (pending.yetNeeded <= 1) {
delete m_pendingIndex[m_pending[_operation].index];
delete m_pending[_operation];
return true;
}
else
{
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
}
}
}
function reorganizeOwners() private {
uint free = 1;
while (free < m_numOwners)
{
while (free < m_numOwners && m_owners[free] != 0) free++;
while (m_numOwners > 1 && m_owners[m_numOwners] == 0) m_numOwners--;
if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0)
{
m_owners[free] = m_owners[m_numOwners];
m_ownerIndex[m_owners[free]] = free;
m_owners[m_numOwners] = 0;
}
}
}
function reorganizeOwners() private {
uint free = 1;
while (free < m_numOwners)
{
while (free < m_numOwners && m_owners[free] != 0) free++;
while (m_numOwners > 1 && m_owners[m_numOwners] == 0) m_numOwners--;
if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0)
{
m_owners[free] = m_owners[m_numOwners];
m_ownerIndex[m_owners[free]] = free;
m_owners[m_numOwners] = 0;
}
}
}
function reorganizeOwners() private {
uint free = 1;
while (free < m_numOwners)
{
while (free < m_numOwners && m_owners[free] != 0) free++;
while (m_numOwners > 1 && m_owners[m_numOwners] == 0) m_numOwners--;
if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0)
{
m_owners[free] = m_owners[m_numOwners];
m_ownerIndex[m_owners[free]] = free;
m_owners[m_numOwners] = 0;
}
}
}
function clearPending() internal {
uint length = m_pendingIndex.length;
for (uint i = 0; i < length; ++i)
if (m_pendingIndex[i] != 0)
delete m_pending[m_pendingIndex[i]];
delete m_pendingIndex;
}
uint constant c_maxOwners = 250;
bytes32[] m_pendingIndex;
uint public m_required;
uint public m_numOwners;
uint[256] m_owners;
mapping(uint => uint) m_ownerIndex;
mapping(bytes32 => PendingState) m_pending;
}
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./full_match/1/0x42c98B354Ea1232Bf2820842905f45732665969F/sources/contracts/ChainLinkTest.sol
|
* @dev Interface of the ERC20 standard as defined in the EIP./
|
interface IERC20 {
function symbol() external view returns (string memory);
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
);
}
| 9,602,025
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/*
https://powerpool.finance/
wrrrw r wrr
ppwr rrr wppr0 prwwwrp prwwwrp wr0
rr 0rrrwrrprpwp0 pp pr prrrr0 pp 0r prrrr0 0rwrrr pp pr prrrr0 prrrr0 r0
rrp pr wr00rrp prwww0 pp wr pp w00r prwwwpr 0rw prwww0 pp wr pp wr r0
r0rprprwrrrp pr0 pp wr pr pp rwwr wr 0r pp wr pr wr pr r0
prwr wrr0wpwr 00 www0 0w0ww www0 0w 00 www0 www0 0www0
wrr ww0rrrr
*/
// File: contracts/balancer-core/BConst.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity 0.6.12;
contract BConst {
uint public constant BONE = 10**18;
uint public constant MIN_BOUND_TOKENS = 2;
uint public constant MAX_BOUND_TOKENS = 8;
uint public constant MIN_FEE = BONE / 10**6;
uint public constant MAX_FEE = BONE / 10;
uint public constant MIN_WEIGHT = BONE;
uint public constant MAX_WEIGHT = BONE * 50;
uint public constant MAX_TOTAL_WEIGHT = BONE * 50;
uint public constant MIN_BALANCE = BONE / 10**12;
uint public constant INIT_POOL_SUPPLY = BONE * 100;
uint public constant MIN_BPOW_BASE = 1 wei;
uint public constant MAX_BPOW_BASE = (2 * BONE) - 1 wei;
uint public constant BPOW_PRECISION = BONE / 10**10;
uint public constant MAX_IN_RATIO = BONE / 2;
uint public constant MAX_OUT_RATIO = (BONE / 3) + 1 wei;
}
// File: contracts/balancer-core/BNum.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity 0.6.12;
contract BNum is BConst {
function btoi(uint a)
internal pure
returns (uint)
{
return a / BONE;
}
function bfloor(uint a)
internal pure
returns (uint)
{
return btoi(a) * BONE;
}
function badd(uint a, uint b)
internal pure
returns (uint)
{
uint c = a + b;
require(c >= a, "ERR_ADD_OVERFLOW");
return c;
}
function bsub(uint a, uint b)
internal pure
returns (uint)
{
(uint c, bool flag) = bsubSign(a, b);
require(!flag, "ERR_SUB_UNDERFLOW");
return c;
}
function bsubSign(uint a, uint b)
internal pure
returns (uint, bool)
{
if (a >= b) {
return (a - b, false);
} else {
return (b - a, true);
}
}
function bmul(uint a, uint b)
internal pure
returns (uint)
{
uint c0 = a * b;
require(a == 0 || c0 / a == b, "ERR_MUL_OVERFLOW");
uint c1 = c0 + (BONE / 2);
require(c1 >= c0, "ERR_MUL_OVERFLOW");
uint c2 = c1 / BONE;
return c2;
}
function bdiv(uint a, uint b)
internal pure
returns (uint)
{
require(b != 0, "ERR_DIV_ZERO");
uint c0 = a * BONE;
require(a == 0 || c0 / a == BONE, "ERR_DIV_INTERNAL"); // bmul overflow
uint c1 = c0 + (b / 2);
require(c1 >= c0, "ERR_DIV_INTERNAL"); // badd require
uint c2 = c1 / b;
return c2;
}
// DSMath.wpow
function bpowi(uint a, uint n)
internal pure
returns (uint)
{
uint z = n % 2 != 0 ? a : BONE;
for (n /= 2; n != 0; n /= 2) {
a = bmul(a, a);
if (n % 2 != 0) {
z = bmul(z, a);
}
}
return z;
}
// Compute b^(e.w) by splitting it into (b^e)*(b^0.w).
// Use `bpowi` for `b^e` and `bpowK` for k iterations
// of approximation of b^0.w
function bpow(uint base, uint exp)
internal pure
returns (uint)
{
require(base >= MIN_BPOW_BASE, "ERR_BPOW_BASE_TOO_LOW");
require(base <= MAX_BPOW_BASE, "ERR_BPOW_BASE_TOO_HIGH");
uint whole = bfloor(exp);
uint remain = bsub(exp, whole);
uint wholePow = bpowi(base, btoi(whole));
if (remain == 0) {
return wholePow;
}
uint partialResult = bpowApprox(base, remain, BPOW_PRECISION);
return bmul(wholePow, partialResult);
}
function bpowApprox(uint base, uint exp, uint precision)
internal pure
returns (uint)
{
// term 0:
uint a = exp;
(uint x, bool xneg) = bsubSign(base, BONE);
uint term = BONE;
uint sum = term;
bool negative = false;
// term(k) = numer / denom
// = (product(a - i - 1, i=1-->k) * x^k) / (k!)
// each iteration, multiply previous term by (a-(k-1)) * x / k
// continue until term is less than precision
for (uint i = 1; term >= precision; i++) {
uint bigK = i * BONE;
(uint c, bool cneg) = bsubSign(a, bsub(bigK, BONE));
term = bmul(term, bmul(c, x));
term = bdiv(term, bigK);
if (term == 0) break;
if (xneg) negative = !negative;
if (cneg) negative = !negative;
if (negative) {
sum = bsub(sum, term);
} else {
sum = badd(sum, term);
}
}
return sum;
}
}
// File: contracts/balancer-core/BToken.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity 0.6.12;
// Highly opinionated token implementation
interface IERC20 {
event Approval(address indexed src, address indexed dst, uint amt);
event Transfer(address indexed src, address indexed dst, uint amt);
function totalSupply() external view returns (uint);
function balanceOf(address whom) external view returns (uint);
function allowance(address src, address dst) external view returns (uint);
function approve(address dst, uint amt) external returns (bool);
function transfer(address dst, uint amt) external returns (bool);
function transferFrom(
address src, address dst, uint amt
) external returns (bool);
}
contract BTokenBase is BNum {
mapping(address => uint) internal _balance;
mapping(address => mapping(address=>uint)) internal _allowance;
uint internal _totalSupply;
event Approval(address indexed src, address indexed dst, uint amt);
event Transfer(address indexed src, address indexed dst, uint amt);
function _mint(uint amt) internal {
_balance[address(this)] = badd(_balance[address(this)], amt);
_totalSupply = badd(_totalSupply, amt);
emit Transfer(address(0), address(this), amt);
}
function _burn(uint amt) internal {
require(_balance[address(this)] >= amt, "ERR_INSUFFICIENT_BAL");
_balance[address(this)] = bsub(_balance[address(this)], amt);
_totalSupply = bsub(_totalSupply, amt);
emit Transfer(address(this), address(0), amt);
}
function _move(address src, address dst, uint amt) internal {
require(_balance[src] >= amt, "ERR_INSUFFICIENT_BAL");
_balance[src] = bsub(_balance[src], amt);
_balance[dst] = badd(_balance[dst], amt);
emit Transfer(src, dst, amt);
}
function _push(address to, uint amt) internal {
_move(address(this), to, amt);
}
function _pull(address from, uint amt) internal {
_move(from, address(this), amt);
}
}
contract BToken is BTokenBase, IERC20 {
string internal _name;
string internal _symbol;
uint8 private _decimals = 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 allowance(address src, address dst) external override view returns (uint) {
return _allowance[src][dst];
}
function balanceOf(address whom) external override view returns (uint) {
return _balance[whom];
}
function totalSupply() public override view returns (uint) {
return _totalSupply;
}
function approve(address dst, uint amt) external override returns (bool) {
_allowance[msg.sender][dst] = amt;
emit Approval(msg.sender, dst, amt);
return true;
}
function increaseApproval(address dst, uint amt) external returns (bool) {
_allowance[msg.sender][dst] = badd(_allowance[msg.sender][dst], amt);
emit Approval(msg.sender, dst, _allowance[msg.sender][dst]);
return true;
}
function decreaseApproval(address dst, uint amt) external returns (bool) {
uint oldValue = _allowance[msg.sender][dst];
if (amt > oldValue) {
_allowance[msg.sender][dst] = 0;
} else {
_allowance[msg.sender][dst] = bsub(oldValue, amt);
}
emit Approval(msg.sender, dst, _allowance[msg.sender][dst]);
return true;
}
function transfer(address dst, uint amt) external override returns (bool) {
_move(msg.sender, dst, amt);
return true;
}
function transferFrom(address src, address dst, uint amt) external override returns (bool) {
require(msg.sender == src || amt <= _allowance[src][msg.sender], "ERR_BTOKEN_BAD_CALLER");
_move(src, dst, amt);
if (msg.sender != src && _allowance[src][msg.sender] != uint256(-1)) {
_allowance[src][msg.sender] = bsub(_allowance[src][msg.sender], amt);
emit Approval(msg.sender, dst, _allowance[src][msg.sender]);
}
return true;
}
}
// File: contracts/balancer-core/BMath.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity 0.6.12;
contract BMath is BConst, BNum {
/**********************************************************************************************
// calcSpotPrice //
// sP = spotPrice //
// bI = tokenBalanceIn ( bI / wI ) 1 //
// bO = tokenBalanceOut sP = ----------- * ---------- //
// wI = tokenWeightIn ( bO / wO ) ( 1 - sF ) //
// wO = tokenWeightOut //
// sF = swapFee //
**********************************************************************************************/
function calcSpotPrice(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint swapFee
)
public pure
returns (uint spotPrice)
{
uint numer = bdiv(tokenBalanceIn, tokenWeightIn);
uint denom = bdiv(tokenBalanceOut, tokenWeightOut);
uint ratio = bdiv(numer, denom);
uint scale = bdiv(BONE, bsub(BONE, swapFee));
return (spotPrice = bmul(ratio, scale));
}
/**********************************************************************************************
// calcOutGivenIn //
// aO = tokenAmountOut //
// bO = tokenBalanceOut //
// bI = tokenBalanceIn / / bI \ (wI / wO) \ //
// aI = tokenAmountIn aO = bO * | 1 - | -------------------------- | ^ | //
// wI = tokenWeightIn \ \ ( bI + ( aI * ( 1 - sF )) / / //
// wO = tokenWeightOut //
// sF = swapFee //
**********************************************************************************************/
function calcOutGivenIn(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint tokenAmountIn,
uint swapFee
)
public pure
returns (uint tokenAmountOut)
{
uint weightRatio = bdiv(tokenWeightIn, tokenWeightOut);
uint adjustedIn = bsub(BONE, swapFee);
adjustedIn = bmul(tokenAmountIn, adjustedIn);
uint y = bdiv(tokenBalanceIn, badd(tokenBalanceIn, adjustedIn));
uint foo = bpow(y, weightRatio);
uint bar = bsub(BONE, foo);
tokenAmountOut = bmul(tokenBalanceOut, bar);
return tokenAmountOut;
}
/**********************************************************************************************
// calcInGivenOut //
// aI = tokenAmountIn //
// bO = tokenBalanceOut / / bO \ (wO / wI) \ //
// bI = tokenBalanceIn bI * | | ------------ | ^ - 1 | //
// aO = tokenAmountOut aI = \ \ ( bO - aO ) / / //
// wI = tokenWeightIn -------------------------------------------- //
// wO = tokenWeightOut ( 1 - sF ) //
// sF = swapFee //
**********************************************************************************************/
function calcInGivenOut(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint tokenAmountOut,
uint swapFee
)
public pure
returns (uint tokenAmountIn)
{
uint weightRatio = bdiv(tokenWeightOut, tokenWeightIn);
uint diff = bsub(tokenBalanceOut, tokenAmountOut);
uint y = bdiv(tokenBalanceOut, diff);
uint foo = bpow(y, weightRatio);
foo = bsub(foo, BONE);
tokenAmountIn = bsub(BONE, swapFee);
tokenAmountIn = bdiv(bmul(tokenBalanceIn, foo), tokenAmountIn);
return tokenAmountIn;
}
/**********************************************************************************************
// calcPoolOutGivenSingleIn //
// pAo = poolAmountOut / \ //
// tAi = tokenAmountIn /// / // wI \ \\ \ wI \ //
// wI = tokenWeightIn //| tAi *| 1 - || 1 - -- | * sF || + tBi \ -- \ //
// tW = totalWeight pAo=|| \ \ \\ tW / // | ^ tW | * pS - pS //
// tBi = tokenBalanceIn \\ ------------------------------------- / / //
// pS = poolSupply \\ tBi / / //
// sF = swapFee \ / //
**********************************************************************************************/
function calcPoolOutGivenSingleIn(
uint tokenBalanceIn,
uint tokenWeightIn,
uint poolSupply,
uint totalWeight,
uint tokenAmountIn,
uint swapFee
)
public pure
returns (uint poolAmountOut)
{
// Charge the trading fee for the proportion of tokenAi
/// which is implicitly traded to the other pool tokens.
// That proportion is (1- weightTokenIn)
// tokenAiAfterFee = tAi * (1 - (1-weightTi) * poolFee);
uint normalizedWeight = bdiv(tokenWeightIn, totalWeight);
uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee);
uint tokenAmountInAfterFee = bmul(tokenAmountIn, bsub(BONE, zaz));
uint newTokenBalanceIn = badd(tokenBalanceIn, tokenAmountInAfterFee);
uint tokenInRatio = bdiv(newTokenBalanceIn, tokenBalanceIn);
// uint newPoolSupply = (ratioTi ^ weightTi) * poolSupply;
uint poolRatio = bpow(tokenInRatio, normalizedWeight);
uint newPoolSupply = bmul(poolRatio, poolSupply);
poolAmountOut = bsub(newPoolSupply, poolSupply);
return poolAmountOut;
}
/**********************************************************************************************
// calcSingleInGivenPoolOut //
// tAi = tokenAmountIn //(pS + pAo)\ / 1 \\ //
// pS = poolSupply || --------- | ^ | --------- || * bI - bI //
// pAo = poolAmountOut \\ pS / \(wI / tW)// //
// bI = balanceIn tAi = -------------------------------------------- //
// wI = weightIn / wI \ //
// tW = totalWeight | 1 - ---- | * sF //
// sF = swapFee \ tW / //
**********************************************************************************************/
function calcSingleInGivenPoolOut(
uint tokenBalanceIn,
uint tokenWeightIn,
uint poolSupply,
uint totalWeight,
uint poolAmountOut,
uint swapFee
)
public pure
returns (uint tokenAmountIn)
{
uint normalizedWeight = bdiv(tokenWeightIn, totalWeight);
uint newPoolSupply = badd(poolSupply, poolAmountOut);
uint poolRatio = bdiv(newPoolSupply, poolSupply);
//uint newBalTi = poolRatio^(1/weightTi) * balTi;
uint boo = bdiv(BONE, normalizedWeight);
uint tokenInRatio = bpow(poolRatio, boo);
uint newTokenBalanceIn = bmul(tokenInRatio, tokenBalanceIn);
uint tokenAmountInAfterFee = bsub(newTokenBalanceIn, tokenBalanceIn);
// Do reverse order of fees charged in joinswap_ExternAmountIn, this way
// ``` pAo == joinswap_ExternAmountIn(Ti, joinswap_PoolAmountOut(pAo, Ti)) ```
//uint tAi = tAiAfterFee / (1 - (1-weightTi) * swapFee) ;
uint zar = bmul(bsub(BONE, normalizedWeight), swapFee);
tokenAmountIn = bdiv(tokenAmountInAfterFee, bsub(BONE, zar));
return tokenAmountIn;
}
/**********************************************************************************************
// calcSingleOutGivenPoolIn //
// tAo = tokenAmountOut / / \\ //
// bO = tokenBalanceOut / // pS - pAi \ / 1 \ \\ //
// pAi = poolAmountIn | bO - || ----------------------- | ^ | --------- | * b0 || //
// ps = poolSupply \ \\ pS / \(wO / tW)/ // //
// wI = tokenWeightIn tAo = \ \ // //
// tW = totalWeight / / wO \ \ //
// sF = swapFee * | 1 - | 1 - ---- | * sF | //
// eF = exitFee \ \ tW / / //
**********************************************************************************************/
function calcSingleOutGivenPoolIn(
uint tokenBalanceOut,
uint tokenWeightOut,
uint poolSupply,
uint totalWeight,
uint poolAmountIn,
uint swapFee
)
public pure
returns (uint tokenAmountOut)
{
uint normalizedWeight = bdiv(tokenWeightOut, totalWeight);
uint newPoolSupply = bsub(poolSupply, poolAmountIn);
uint poolRatio = bdiv(newPoolSupply, poolSupply);
// newBalTo = poolRatio^(1/weightTo) * balTo;
uint tokenOutRatio = bpow(poolRatio, bdiv(BONE, normalizedWeight));
uint newTokenBalanceOut = bmul(tokenOutRatio, tokenBalanceOut);
uint tokenAmountOutBeforeSwapFee = bsub(tokenBalanceOut, newTokenBalanceOut);
// charge swap fee on the output token side
//uint tAo = tAoBeforeSwapFee * (1 - (1-weightTo) * swapFee)
uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee);
tokenAmountOut = bmul(tokenAmountOutBeforeSwapFee, bsub(BONE, zaz));
return tokenAmountOut;
}
/**********************************************************************************************
// calcPoolInGivenSingleOut //
// pAi = poolAmountIn // / tAo \\ / wO \ \ //
// bO = tokenBalanceOut // | bO - -------------------------- |\ | ---- | \ //
// tAo = tokenAmountOut pS - || \ 1 - ((1 - (tO / tW)) * sF)/ | ^ \ tW / * pS | //
// ps = poolSupply \\ -----------------------------------/ / //
// wO = tokenWeightOut pAi = \\ bO / / //
// tW = totalWeight //
// sF = swapFee //
**********************************************************************************************/
function calcPoolInGivenSingleOut(
uint tokenBalanceOut,
uint tokenWeightOut,
uint poolSupply,
uint totalWeight,
uint tokenAmountOut,
uint swapFee
)
public pure
returns (uint poolAmountIn)
{
// charge swap fee on the output token side
uint normalizedWeight = bdiv(tokenWeightOut, totalWeight);
//uint tAoBeforeSwapFee = tAo / (1 - (1-weightTo) * swapFee) ;
uint zoo = bsub(BONE, normalizedWeight);
uint zar = bmul(zoo, swapFee);
uint tokenAmountOutBeforeSwapFee = bdiv(tokenAmountOut, bsub(BONE, zar));
uint newTokenBalanceOut = bsub(tokenBalanceOut, tokenAmountOutBeforeSwapFee);
uint tokenOutRatio = bdiv(newTokenBalanceOut, tokenBalanceOut);
//uint newPoolSupply = (ratioTo ^ weightTo) * poolSupply;
uint poolRatio = bpow(tokenOutRatio, normalizedWeight);
uint newPoolSupply = bmul(poolRatio, poolSupply);
uint poolAmountIn = bsub(poolSupply, newPoolSupply);
return poolAmountIn;
}
}
// File: contracts/IPoolRestrictions.sol
pragma solidity 0.6.12;
interface IPoolRestrictions {
function getMaxTotalSupply(address _pool) external virtual view returns(uint256);
function isVotingSignatureAllowed(address _votingAddress, bytes4 _signature) external virtual view returns(bool);
function isWithoutFee(address _addr) external virtual view returns(bool);
}
// File: contracts/balancer-core/BPool.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity 0.6.12;
contract BPool is BToken, BMath {
struct Record {
bool bound; // is token bound to pool
uint index; // private
uint denorm; // denormalized weight
uint balance;
}
event LOG_SWAP(
address indexed caller,
address indexed tokenIn,
address indexed tokenOut,
uint256 tokenAmountIn,
uint256 tokenAmountOut
);
event LOG_JOIN(
address indexed caller,
address indexed tokenIn,
uint256 tokenAmountIn
);
event LOG_EXIT(
address indexed caller,
address indexed tokenOut,
uint256 tokenAmountOut
);
event LOG_CALL(
bytes4 indexed sig,
address indexed caller,
bytes data
) anonymous;
event LOG_CALL_VOTING(
address indexed voting,
bool indexed success,
bytes4 indexed inputSig,
bytes inputData,
bytes outputData
);
modifier _logs_() {
emit LOG_CALL(msg.sig, msg.sender, msg.data);
_;
}
modifier _lock_() {
require(!_mutex, "REENTRY");
_mutex = true;
_;
_mutex = false;
}
modifier _viewlock_() {
require(!_mutex, "REENTRY");
_;
}
bool private _mutex;
address private _controller; // has CONTROL role
bool private _publicSwap; // true if PUBLIC can call SWAP functions
IPoolRestrictions private _restrictions;
// `setSwapFee` and `finalize` require CONTROL
// `finalize` sets `PUBLIC can SWAP`, `PUBLIC can JOIN`
uint private _swapFee;
uint private _communitySwapFee;
uint private _communityJoinFee;
uint private _communityExitFee;
address private _communityFeeReceiver;
bool private _finalized;
address[] private _tokens;
mapping(address=>Record) private _records;
uint private _totalWeight;
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_controller = msg.sender;
_swapFee = MIN_FEE;
_communitySwapFee = 0;
_communityJoinFee = 0;
_communityExitFee = 0;
_publicSwap = false;
_finalized = false;
}
function isPublicSwap()
external view
returns (bool)
{
return _publicSwap;
}
function isFinalized()
external view
returns (bool)
{
return _finalized;
}
function isBound(address t)
external view
returns (bool)
{
return _records[t].bound;
}
function getNumTokens()
external view
returns (uint)
{
return _tokens.length;
}
function getCurrentTokens()
external view _viewlock_
returns (address[] memory tokens)
{
return _tokens;
}
function getFinalTokens()
external view
_viewlock_
returns (address[] memory tokens)
{
require(_finalized, "NOT_FINALIZED");
return _tokens;
}
function getDenormalizedWeight(address token)
external view
_viewlock_
returns (uint)
{
_checkBound(token);
return _records[token].denorm;
}
function getTotalDenormalizedWeight()
external view
_viewlock_
returns (uint)
{
return _totalWeight;
}
function getNormalizedWeight(address token)
external view
_viewlock_
returns (uint)
{
_checkBound(token);
return bdiv(_records[token].denorm, _totalWeight);
}
function getBalance(address token)
external view
_viewlock_
returns (uint)
{
_checkBound(token);
return _records[token].balance;
}
function getSwapFee()
external view
_viewlock_
returns (uint)
{
return _swapFee;
}
function getCommunityFee()
external view
_viewlock_
returns (uint communitySwapFee, uint communityJoinFee, uint communityExitFee, address communityFeeReceiver)
{
return (_communitySwapFee, _communityJoinFee, _communityExitFee, _communityFeeReceiver);
}
function getController()
external view
_viewlock_
returns (address)
{
return _controller;
}
function getRestrictions()
external view
_viewlock_
returns (address)
{
return address(_restrictions);
}
function setSwapFee(uint swapFee)
external
_logs_
_lock_
{
_checkController();
require(swapFee >= MIN_FEE && swapFee <= MAX_FEE, "FEE_BOUNDS");
_swapFee = swapFee;
}
function setCommunityFeeAndReceiver(
uint communitySwapFee,
uint communityJoinFee,
uint communityExitFee,
address communityFeeReceiver
)
external
_logs_
_lock_
{
_checkController();
require(communitySwapFee >= MIN_FEE && communitySwapFee <= MAX_FEE, "FEE_BOUNDS");
require(communityJoinFee >= MIN_FEE && communityJoinFee <= MAX_FEE, "FEE_BOUNDS");
require(communityExitFee >= MIN_FEE && communityExitFee <= MAX_FEE, "FEE_BOUNDS");
_communitySwapFee = communitySwapFee;
_communityJoinFee = communityJoinFee;
_communityExitFee = communityExitFee;
_communityFeeReceiver = communityFeeReceiver;
}
function setRestrictions(IPoolRestrictions restrictions)
external
_logs_
_lock_
{
_checkController();
_restrictions = restrictions;
}
function setController(address manager)
external
_logs_
_lock_
{
_checkController();
_controller = manager;
}
function setPublicSwap(bool public_)
external
_logs_
_lock_
{
_checkFinalized();
_checkController();
_publicSwap = public_;
}
function finalize()
external
_logs_
_lock_
{
_checkController();
_checkFinalized();
require(_tokens.length >= MIN_BOUND_TOKENS, "MIN_TOKENS");
_finalized = true;
_publicSwap = true;
_mintPoolShare(INIT_POOL_SUPPLY);
_pushPoolShare(msg.sender, INIT_POOL_SUPPLY);
}
function callVoting(address voting, bytes4 signature, bytes calldata args, uint value)
external
_logs_
_lock_
{
require(_restrictions.isVotingSignatureAllowed(voting, signature), "NOT_ALLOWED_SIG");
_checkController();
(bool success, bytes memory data) = voting.call{ value: value }(abi.encodePacked(signature, args));
require(success, "NOT_SUCCESS");
emit LOG_CALL_VOTING(voting, success, signature, msg.data, data);
}
function bind(address token, uint balance, uint denorm)
external
_logs_
// _lock_ Bind does not lock because it jumps to `rebind`, which does
{
_checkController();
require(!_records[token].bound, "IS_BOUND");
_checkFinalized();
require(_tokens.length < MAX_BOUND_TOKENS, "MAX_TOKENS");
_records[token] = Record({
bound: true,
index: _tokens.length,
denorm: 0, // balance and denorm will be validated
balance: 0 // and set by `rebind`
});
_tokens.push(token);
rebind(token, balance, denorm);
}
function rebind(address token, uint balance, uint denorm)
public
_logs_
_lock_
{
_checkController();
_checkBound(token);
_checkFinalized();
require(denorm >= MIN_WEIGHT && denorm <= MAX_WEIGHT, "WEIGHT_BOUNDS");
require(balance >= MIN_BALANCE, "MIN_BALANCE");
// Adjust the denorm and totalWeight
uint oldWeight = _records[token].denorm;
if (denorm > oldWeight) {
_totalWeight = badd(_totalWeight, bsub(denorm, oldWeight));
require(_totalWeight <= MAX_TOTAL_WEIGHT, "MAX_TOTAL_WEIGHT");
} else if (denorm < oldWeight) {
_totalWeight = bsub(_totalWeight, bsub(oldWeight, denorm));
}
_records[token].denorm = denorm;
// Adjust the balance record and actual token balance
uint oldBalance = _records[token].balance;
_records[token].balance = balance;
if (balance > oldBalance) {
_pullUnderlying(token, msg.sender, bsub(balance, oldBalance));
} else if (balance < oldBalance) {
uint tokenBalanceWithdrawn = bsub(oldBalance, balance);
_pushUnderlying(token, msg.sender, tokenBalanceWithdrawn);
}
}
function unbind(address token)
external
_logs_
_lock_
{
_checkController();
_checkBound(token);
_checkFinalized();
uint tokenBalance = _records[token].balance;
_totalWeight = bsub(_totalWeight, _records[token].denorm);
// Swap the token-to-unbind with the last token,
// then delete the last token
uint index = _records[token].index;
uint last = _tokens.length - 1;
_tokens[index] = _tokens[last];
_records[_tokens[index]].index = index;
_tokens.pop();
_records[token] = Record({
bound: false,
index: 0,
denorm: 0,
balance: 0
});
_pushUnderlying(token, msg.sender, tokenBalance);
}
// Absorb any tokens that have been sent to this contract into the pool
function gulp(address token)
external
_logs_
_lock_
{
_checkBound(token);
_records[token].balance = IERC20(token).balanceOf(address(this));
}
function getSpotPrice(address tokenIn, address tokenOut)
external view
_viewlock_
returns (uint spotPrice)
{
require(_records[tokenIn].bound && _records[tokenOut].bound, "NOT_BOUND");
Record storage inRecord = _records[tokenIn];
Record storage outRecord = _records[tokenOut];
return calcSpotPrice(inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee);
}
function getSpotPriceSansFee(address tokenIn, address tokenOut)
external view
_viewlock_
returns (uint spotPrice)
{
_checkBound(tokenIn);
_checkBound(tokenOut);
Record storage inRecord = _records[tokenIn];
Record storage outRecord = _records[tokenOut];
return calcSpotPrice(inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, 0);
}
function joinPool(uint poolAmountOut, uint[] calldata maxAmountsIn)
external
_logs_
_lock_
{
require(_finalized, "NOT_FINALIZED");
uint poolTotal = totalSupply();
uint ratio = bdiv(poolAmountOut, poolTotal);
require(ratio != 0, "MATH_APPROX");
for (uint i = 0; i < _tokens.length; i++) {
address t = _tokens[i];
uint bal = _records[t].balance;
uint tokenAmountIn = bmul(ratio, bal);
require(tokenAmountIn != 0, "MATH_APPROX");
require(tokenAmountIn <= maxAmountsIn[i], "LIMIT_IN");
_records[t].balance = badd(_records[t].balance, tokenAmountIn);
emit LOG_JOIN(msg.sender, t, tokenAmountIn);
_pullUnderlying(t, msg.sender, tokenAmountIn);
}
(uint poolAmountOutAfterFee, uint poolAmountOutFee) = calcAmountWithCommunityFee(
poolAmountOut,
_communityJoinFee,
msg.sender
);
_mintPoolShare(poolAmountOut);
_pushPoolShare(msg.sender, poolAmountOutAfterFee);
_pushPoolShare(_communityFeeReceiver, poolAmountOutFee);
}
function exitPool(uint poolAmountIn, uint[] calldata minAmountsOut)
external
_logs_
_lock_
{
require(_finalized, "NOT_FINALIZED");
(uint poolAmountInAfterFee, uint poolAmountInFee) = calcAmountWithCommunityFee(
poolAmountIn,
_communityExitFee,
msg.sender
);
uint poolTotal = totalSupply();
uint ratio = bdiv(poolAmountInAfterFee, poolTotal);
require(ratio != 0, "MATH_APPROX");
_pullPoolShare(msg.sender, poolAmountIn);
_pushPoolShare(_communityFeeReceiver, poolAmountInFee);
_burnPoolShare(poolAmountInAfterFee);
for (uint i = 0; i < _tokens.length; i++) {
address t = _tokens[i];
uint bal = _records[t].balance;
uint tokenAmountOut = bmul(ratio, bal);
require(tokenAmountOut != 0, "MATH_APPROX");
require(tokenAmountOut >= minAmountsOut[i], "LIMIT_OUT");
_records[t].balance = bsub(_records[t].balance, tokenAmountOut);
emit LOG_EXIT(msg.sender, t, tokenAmountOut);
_pushUnderlying(t, msg.sender, tokenAmountOut);
}
}
function swapExactAmountIn(
address tokenIn,
uint tokenAmountIn,
address tokenOut,
uint minAmountOut,
uint maxPrice
)
external
_logs_
_lock_
returns (uint tokenAmountOut, uint spotPriceAfter)
{
_checkBound(tokenIn);
_checkBound(tokenOut);
require(_publicSwap, "NOT_PUBLIC");
Record storage inRecord = _records[address(tokenIn)];
Record storage outRecord = _records[address(tokenOut)];
uint spotPriceBefore = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(spotPriceBefore <= maxPrice, "LIMIT_PRICE");
(uint tokenAmountInAfterFee, uint tokenAmountInFee) = calcAmountWithCommunityFee(
tokenAmountIn,
_communitySwapFee,
msg.sender
);
require(tokenAmountInAfterFee <= bmul(inRecord.balance, MAX_IN_RATIO), "MAX_IN_RATIO");
tokenAmountOut = calcOutGivenIn(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
tokenAmountInAfterFee,
_swapFee
);
require(tokenAmountOut >= minAmountOut, "LIMIT_OUT");
inRecord.balance = badd(inRecord.balance, tokenAmountInAfterFee);
outRecord.balance = bsub(outRecord.balance, tokenAmountOut);
spotPriceAfter = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(
spotPriceAfter >= spotPriceBefore &&
spotPriceBefore <= bdiv(tokenAmountInAfterFee, tokenAmountOut),
"MATH_APPROX"
);
require(spotPriceAfter <= maxPrice, "LIMIT_PRICE");
emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountInAfterFee, tokenAmountOut);
_pullCommunityFeeUnderlying(tokenIn, msg.sender, tokenAmountInFee);
_pullUnderlying(tokenIn, msg.sender, tokenAmountInAfterFee);
_pushUnderlying(tokenOut, msg.sender, tokenAmountOut);
return (tokenAmountOut, spotPriceAfter);
}
function swapExactAmountOut(
address tokenIn,
uint maxAmountIn,
address tokenOut,
uint tokenAmountOut,
uint maxPrice
)
external
_logs_
_lock_
returns (uint tokenAmountIn, uint spotPriceAfter)
{
_checkBound(tokenIn);
_checkBound(tokenOut);
require(_publicSwap, "NOT_PUBLIC");
Record storage inRecord = _records[address(tokenIn)];
Record storage outRecord = _records[address(tokenOut)];
require(tokenAmountOut <= bmul(outRecord.balance, MAX_OUT_RATIO), "OUT_RATIO");
uint spotPriceBefore = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(spotPriceBefore <= maxPrice, "LIMIT_PRICE");
(uint tokenAmountOutAfterFee, uint tokenAmountOutFee) = calcAmountWithCommunityFee(
tokenAmountOut,
_communitySwapFee,
msg.sender
);
tokenAmountIn = calcInGivenOut(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
tokenAmountOut,
_swapFee
);
require(tokenAmountIn <= maxAmountIn, "LIMIT_IN");
inRecord.balance = badd(inRecord.balance, tokenAmountIn);
outRecord.balance = bsub(outRecord.balance, tokenAmountOut);
spotPriceAfter = calcSpotPrice(
inRecord.balance,
inRecord.denorm,
outRecord.balance,
outRecord.denorm,
_swapFee
);
require(
spotPriceAfter >= spotPriceBefore &&
spotPriceBefore <= bdiv(tokenAmountIn, tokenAmountOutAfterFee),
"MATH_APPROX"
);
require(spotPriceAfter <= maxPrice, "LIMIT_PRICE");
emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountIn, tokenAmountOutAfterFee);
_pullUnderlying(tokenIn, msg.sender, tokenAmountIn);
_pushUnderlying(tokenOut, msg.sender, tokenAmountOutAfterFee);
_pushUnderlying(tokenOut, _communityFeeReceiver, tokenAmountOutFee);
return (tokenAmountIn, spotPriceAfter);
}
function joinswapExternAmountIn(address tokenIn, uint tokenAmountIn, uint minPoolAmountOut)
external
_logs_
_lock_
returns (uint poolAmountOut)
{
require(_finalized, "NOT_FINALIZED");
_checkBound(tokenIn);
require(tokenAmountIn <= bmul(_records[tokenIn].balance, MAX_IN_RATIO), "MAX_IN_RATIO");
(uint tokenAmountInAfterFee, uint tokenAmountInFee) = calcAmountWithCommunityFee(
tokenAmountIn,
_communityJoinFee,
msg.sender
);
Record storage inRecord = _records[tokenIn];
poolAmountOut = calcPoolOutGivenSingleIn(
inRecord.balance,
inRecord.denorm,
_totalSupply,
_totalWeight,
tokenAmountInAfterFee,
_swapFee
);
require(poolAmountOut >= minPoolAmountOut, "LIMIT_OUT");
inRecord.balance = badd(inRecord.balance, tokenAmountInAfterFee);
emit LOG_JOIN(msg.sender, tokenIn, tokenAmountInAfterFee);
_mintPoolShare(poolAmountOut);
_pushPoolShare(msg.sender, poolAmountOut);
_pullCommunityFeeUnderlying(tokenIn, msg.sender, tokenAmountInFee);
_pullUnderlying(tokenIn, msg.sender, tokenAmountInAfterFee);
return poolAmountOut;
}
function joinswapPoolAmountOut(address tokenIn, uint poolAmountOut, uint maxAmountIn)
external
_logs_
_lock_
returns (uint tokenAmountIn)
{
require(_finalized, "NOT_FINALIZED");
_checkBound(tokenIn);
Record storage inRecord = _records[tokenIn];
(uint poolAmountOutAfterFee, uint poolAmountOutFee) = calcAmountWithCommunityFee(
poolAmountOut,
_communityJoinFee,
msg.sender
);
tokenAmountIn = calcSingleInGivenPoolOut(
inRecord.balance,
inRecord.denorm,
_totalSupply,
_totalWeight,
poolAmountOut,
_swapFee
);
require(tokenAmountIn != 0, "MATH_APPROX");
require(tokenAmountIn <= maxAmountIn, "LIMIT_IN");
require(tokenAmountIn <= bmul(_records[tokenIn].balance, MAX_IN_RATIO), "MAX_IN_RATIO");
inRecord.balance = badd(inRecord.balance, tokenAmountIn);
emit LOG_JOIN(msg.sender, tokenIn, tokenAmountIn);
_mintPoolShare(poolAmountOut);
_pushPoolShare(msg.sender, poolAmountOutAfterFee);
_pushPoolShare(_communityFeeReceiver, poolAmountOutFee);
_pullUnderlying(tokenIn, msg.sender, tokenAmountIn);
return tokenAmountIn;
}
function exitswapPoolAmountIn(address tokenOut, uint poolAmountIn, uint minAmountOut)
external
_logs_
_lock_
returns (uint tokenAmountOut)
{
require(_finalized, "NOT_FINALIZED");
_checkBound(tokenOut);
Record storage outRecord = _records[tokenOut];
tokenAmountOut = calcSingleOutGivenPoolIn(
outRecord.balance,
outRecord.denorm,
_totalSupply,
_totalWeight,
poolAmountIn,
_swapFee
);
require(tokenAmountOut >= minAmountOut, "LIMIT_OUT");
require(tokenAmountOut <= bmul(_records[tokenOut].balance, MAX_OUT_RATIO), "OUT_RATIO");
outRecord.balance = bsub(outRecord.balance, tokenAmountOut);
(uint tokenAmountOutAfterFee, uint tokenAmountOutFee) = calcAmountWithCommunityFee(
tokenAmountOut,
_communityExitFee,
msg.sender
);
emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOutAfterFee);
_pullPoolShare(msg.sender, poolAmountIn);
_burnPoolShare(poolAmountIn);
_pushUnderlying(tokenOut, msg.sender, tokenAmountOutAfterFee);
_pushUnderlying(tokenOut, _communityFeeReceiver, tokenAmountOutFee);
return tokenAmountOut;
}
function exitswapExternAmountOut(address tokenOut, uint tokenAmountOut, uint maxPoolAmountIn)
external
_logs_
_lock_
returns (uint poolAmountIn)
{
require(_finalized, "NOT_FINALIZED");
_checkBound(tokenOut);
require(tokenAmountOut <= bmul(_records[tokenOut].balance, MAX_OUT_RATIO), "OUT_RATIO");
Record storage outRecord = _records[tokenOut];
(uint tokenAmountOutAfterFee, uint tokenAmountOutFee) = calcAmountWithCommunityFee(
tokenAmountOut,
_communityExitFee,
msg.sender
);
poolAmountIn = calcPoolInGivenSingleOut(
outRecord.balance,
outRecord.denorm,
_totalSupply,
_totalWeight,
tokenAmountOut,
_swapFee
);
require(poolAmountIn != 0, "MATH_APPROX");
require(poolAmountIn <= maxPoolAmountIn, "LIMIT_IN");
outRecord.balance = bsub(outRecord.balance, tokenAmountOut);
emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOutAfterFee);
_pullPoolShare(msg.sender, poolAmountIn);
_burnPoolShare(poolAmountIn);
_pushUnderlying(tokenOut, msg.sender, tokenAmountOutAfterFee);
_pushUnderlying(tokenOut, _communityFeeReceiver, tokenAmountOutFee);
return poolAmountIn;
}
// ==
// '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, uint amount)
internal
{
bool xfer = IERC20(erc20).transferFrom(from, address(this), amount);
require(xfer, "ERC20_FALSE");
}
function _pushUnderlying(address erc20, address to, uint amount)
internal
{
bool xfer = IERC20(erc20).transfer(to, amount);
require(xfer, "ERC20_FALSE");
}
function _pullCommunityFeeUnderlying(address erc20, address from, uint amount)
internal
{
bool xfer = IERC20(erc20).transferFrom(from, _communityFeeReceiver, amount);
require(xfer, "ERC20_FALSE");
}
function _pullPoolShare(address from, uint amount)
internal
{
_pull(from, amount);
}
function _pushPoolShare(address to, uint amount)
internal
{
_push(to, amount);
}
function _mintPoolShare(uint amount)
internal
{
if(address(_restrictions) != address(0)) {
uint maxTotalSupply = _restrictions.getMaxTotalSupply(address(this));
require(badd(_totalSupply, amount) <= maxTotalSupply, "MAX_SUPPLY");
}
_mint(amount);
}
function _burnPoolShare(uint amount)
internal
{
_burn(amount);
}
function _checkBound(address token)
internal view
{
require(_records[token].bound, "NOT_BOUND");
}
function _checkController()
internal view
{
require(msg.sender == _controller, "NOT_CONTROLLER");
}
function _checkFinalized()
internal view
{
require(!_finalized, "IS_FINALIZED");
}
function calcAmountWithCommunityFee(
uint tokenAmountIn,
uint communityFee,
address operator
)
public view
returns (uint tokenAmountInAfterFee, uint tokenAmountFee)
{
if (address(_restrictions) != address(0) && _restrictions.isWithoutFee(operator)) {
return (tokenAmountIn, 0);
}
uint adjustedIn = bsub(BONE, communityFee);
tokenAmountInAfterFee = bmul(tokenAmountIn, adjustedIn);
uint tokenAmountFee = bsub(tokenAmountIn, tokenAmountInAfterFee);
return (tokenAmountInAfterFee, tokenAmountFee);
}
}
|
Absorb any tokens that have been sent to this contract into the pool
|
function gulp(address token)
external
_logs_
_lock_
{
_checkBound(token);
_records[token].balance = IERC20(token).balanceOf(address(this));
}
| 360,489
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pragma solidity 0.5.8;
import "openzeppelin-solidity/contracts/math/SafeMath.sol";
import "openzeppelin-solidity/contracts/token/ERC20/ERC20.sol";
// DO NOT USE. Not complete
contract DAO
{
using SafeMath for uint;
enum Vote
{
NoVote,
For,
Against
}
struct Member
{
address payable memberAddress;
uint weight;
}
struct Proposal
{
address contractAddress;
bytes transactionBytes;
uint value;
uint proposedOn;
uint executedOn;
mapping (address => Vote) addressToVote;
}
mapping (address => uint) public addressToMemberIdPlusOne;
Member[] public members;
uint public proposalCount;
mapping (uint => Proposal) public idToProposal;
uint public timeTillMinorityCanExecute;
uint public timeTillExpired;
uint public minimumReserve;
event AddProposal(address proposalFrom, uint proposalId);
event VoteOnProposal(address voteFrom, uint proposalId, bool inFavorOf);
event ExecuteProposal(address requestFrom, uint proposalId, bool success);
event Withdrawl(address requestFrom, uint totalAmount);
event WithdrawlERC20(address requestFrom, address tokenAddress, uint totalAmount);
event AddMember(address memberAddress, uint weight);
event RemoveMember(address memberAddress);
event SwapMember(address originalAddress, address newAddress);
event SetMemberWeight(address memberAddress, uint fromWeight, uint newWeight);
event SetTimeTillMinorityCanExecute(uint timeTillMinorityCanExecute);
event SetTimeTillExpired(uint timeTillExpired);
event SetMinimumReserve(uint minimumReserve);
modifier onlyMembers
{
require(addressToMemberIdPlusOne[msg.sender] != 0);
_;
}
modifier onlyApprovedProposals
{
require(msg.sender == address(this));
_;
}
constructor() public
{
timeTillMinorityCanExecute = 2 weeks;
timeTillExpired = 4 weeks;
minimumReserve = 1 ether;
_addMember(msg.sender, 1000000);
}
// Accept money from anyone, no logic to save on gas
function() external payable {}
function addProposal(
address contractAddress,
bytes memory transactionBytes,
uint value
) onlyMembers public
{
require(contractAddress != address(0));
require(transactionBytes.length != 0);
uint proposalId = proposalCount++;
idToProposal[proposalId] = Proposal(contractAddress, transactionBytes, value, now, 0);
emit AddProposal(msg.sender, proposalId);
// If you added the proposal, you're assumed to be in favor
voteOnProposal(proposalId, true);
}
function voteOnProposal(uint proposalId, bool inFavorOf) public
{
require(isProposalOpen(proposalId));
Proposal storage proposal = idToProposal[proposalId];
proposal.addressToVote[msg.sender] = inFavorOf ? Vote.For : Vote.Against;
emit VoteOnProposal(msg.sender, proposalId, inFavorOf);
}
function isProposalOpen(uint proposalId) view public returns (bool isOpen)
{
Proposal storage proposal = idToProposal[proposalId];
return proposal.executedOn == 0
&& proposal.proposedOn + timeTillExpired > now;
}
function executeProposal(uint proposalId) onlyMembers public
{
require(isProposalOpen(proposalId));
require(isProposalApproved(proposalId));
Proposal storage proposal = idToProposal[proposalId];
// TODO: this is throwing a compile error ATM
// bool success = proposal.contractAddress.call.value(proposal.value)(proposal.transactionBytes);
// if(success)
// { // Allow resubmitting a failed call
// proposal.executedOn = now;
// }
// emit ExecuteProposal(msg.sender, proposalId, success);
}
function isProposalApproved(uint proposalId) view public returns (bool canExecute)
{
Proposal storage proposal = idToProposal[proposalId];
uint weightFor;
uint weightAgainst;
uint countFor;
uint countAgainst;
uint totalWeight;
for(uint i = 0; i < members.length; i++)
{
Member memory member = members[i];
totalWeight = totalWeight.add(member.weight);
Vote vote = proposal.addressToVote[member.memberAddress];
if(vote == Vote.For)
{
countFor++;
weightFor = weightFor.add(member.weight);
}
else if(vote == Vote.Against)
{
countAgainst++;
weightAgainst = weightAgainst.add(member.weight);
}
}
if(weightAgainst >= totalWeight.add(1).div(2) || countAgainst >= (members.length + 1) / 2)
{ // Majority no of either weight or count == denied
return false;
}
else if(weightFor >= totalWeight.mul(2).add(2).div(3) || countFor >= (members.length * 2 + 2) / 3)
{ // Super Majority of either weight or count == approved
return true;
}
else if(weightFor > totalWeight.add(1).div(2) && countFor > (members.length + 1) / 2)
{ // Majority of both Weight & Count == approved
return true;
}
else if(weightFor >= weightAgainst && countFor >= countAgainst)
{ // Minority can execute if more are for than against after timeTillMinorityCanExecute has passed
uint timeSinceProposed = now.sub(proposal.proposedOn);
return timeSinceProposed > timeTillMinorityCanExecute;
}
else
{
return false;
}
}
function addMember(address payable _address, uint _weight) onlyApprovedProposals public
{
_withdrawl();
_addMember(_address, _weight);
}
function _addMember(address payable _address, uint _weight) internal
{
require(_address != address(0));
require(_weight > 0);
require(_weight < 1000000000000000);
require(addressToMemberIdPlusOne[_address] == 0);
uint id = members.length;
addressToMemberIdPlusOne[_address] = id + 1;
members.push(Member(_address, _weight));
emit AddMember(_address, _weight);
}
function removeMember(address _address) onlyApprovedProposals public
{
require(members.length > 1); // You can't remove the last member
uint id = addressToMemberIdPlusOne[_address];
require(id > 0);
id--;
addressToMemberIdPlusOne[_address] = 0;
members[id] = members[members.length - 1];
members.length--;
emit RemoveMember(_address);
}
function swapMember(address _originalAddress, address payable _newAddress) onlyApprovedProposals public
{
require(_newAddress != address(0));
uint id = addressToMemberIdPlusOne[_originalAddress];
require(id > 0);
id--;
members[id].memberAddress = _newAddress;
emit SwapMember(_originalAddress, _newAddress);
}
function setMemberWeights(address[] memory _addresses, uint[] memory _weights) onlyApprovedProposals public
{
require(_addresses.length == _weights.length);
_withdrawl();
for(uint i = 0; i < _addresses.length; i++)
{
uint memberId = addressToMemberIdPlusOne[_addresses[i]];
require(memberId > 0);
memberId--;
require(_weights[i] > 0);
require(_weights[i] < 1000000000000000);
Member storage member = members[memberId];
emit SetMemberWeight(member.memberAddress, member.weight, _weights[i]);
member.weight = _weights[i];
}
}
function setTimeTillMinorityCanExecute(uint _timeTillMinorityCanExecute) onlyApprovedProposals public
{
require(_timeTillMinorityCanExecute > 0); // This may prevent a smart contract attack
timeTillMinorityCanExecute = _timeTillMinorityCanExecute;
emit SetTimeTillMinorityCanExecute(timeTillMinorityCanExecute);
}
function setTimeTillExpired(uint _timeTillExpired) onlyApprovedProposals public
{
require(_timeTillExpired > timeTillMinorityCanExecute);
timeTillExpired = _timeTillExpired;
emit SetTimeTillExpired(timeTillExpired);
}
function setMinimumReserve(uint _minimumReserve) onlyApprovedProposals public
{
minimumReserve = _minimumReserve;
emit SetMinimumReserve(minimumReserve);
}
function send(address payable _to, uint _amount) onlyApprovedProposals public
{
_to.transfer(_amount);
}
function withdrawl() onlyMembers public
{
_withdrawl();
}
function _withdrawl() internal
{
uint balance = address(this).balance;
uint totalAmount;
if(balance > minimumReserve)
{
balance = balance.sub(minimumReserve);
uint i;
uint totalWeight = 0;
for(i = 0; i < members.length; i++)
{
totalWeight = totalWeight.add(members[i].weight);
}
for(i = 0; i < members.length; i++)
{
Member memory member = members[i];
uint share = balance.mul(member.weight).div(totalWeight);
if(member.memberAddress.send(share))
{
totalAmount += share;
}
}
}
emit Withdrawl(msg.sender, totalAmount);
}
function estimateWithdrawl() onlyMembers view public returns (uint amount)
{
uint balance = address(this).balance;
if(balance <= minimumReserve)
{
return 0;
}
balance = balance.sub(minimumReserve);
uint i;
uint totalWeight = 0;
for(i = 0; i < members.length; i++)
{
totalWeight = totalWeight.add(members[i].weight);
}
uint memberId = addressToMemberIdPlusOne[msg.sender];
require(memberId > 0);
memberId--;
Member memory member = members[memberId];
return balance.mul(member.weight).div(totalWeight);
}
function withdrawlERC20(address _tokenAddress) onlyMembers public
{
ERC20 erc20 = ERC20(_tokenAddress);
uint balance = erc20.balanceOf(address(this));
uint totalAmount;
uint i;
uint totalWeight = 0;
for(i = 0; i < members.length; i++)
{
totalWeight = totalWeight.add(members[i].weight);
}
for(i = 0; i < members.length; i++)
{
Member memory member = members[i];
uint share = balance.mul(member.weight).div(totalWeight);
if(erc20.transfer(member.memberAddress, share))
{
totalAmount += share;
}
}
emit WithdrawlERC20(msg.sender, _tokenAddress, totalAmount);
}
function estimateWithdrawlERC20(address _tokenAddress) onlyMembers view public returns (uint amount)
{
ERC20 erc20 = ERC20(_tokenAddress);
uint balance = erc20.balanceOf(address(this));
uint i;
uint totalWeight = 0;
for(i = 0; i < members.length; i++)
{
totalWeight = totalWeight.add(members[i].weight);
}
uint memberId = addressToMemberIdPlusOne[msg.sender];
require(memberId > 0);
memberId--;
Member memory member = members[memberId];
return balance.mul(member.weight).div(totalWeight);
}
}
|
If you added the proposal, you're assumed to be in favor
|
function addProposal(
address contractAddress,
bytes memory transactionBytes,
uint value
) onlyMembers public
{
require(contractAddress != address(0));
require(transactionBytes.length != 0);
uint proposalId = proposalCount++;
idToProposal[proposalId] = Proposal(contractAddress, transactionBytes, value, now, 0);
emit AddProposal(msg.sender, proposalId);
voteOnProposal(proposalId, true);
}
| 6,480,293
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./full_match/1/0x3265224513e1a9bA039D8cf64c71F69135e3D063/sources/browser/presale1.sol
|
@dev ERC20 token address and decimals@dev amount of tokens per ether 100 indicates 1 token per eth@dev decimal for tokenRatePerEth,2 means if you want 100 tokens per eth then set the rate as 100 + number of rateDecimals i.e => 10000@dev max and min token buy limit per account
|
contract Presale is Owned {
using SafeMath for uint256;
bool public isPresaleOpen;
address public tokenAddress;
uint256 public tokenDecimals = 18;
uint256 public tokenRatePerEth = 1000_00;
uint256 public rateDecimals = 2;
uint256 public minEthLimit = 500 finney;
uint256 public maxEthLimit = 2 ether;
mapping(address => uint256) public usersInvestments;
constructor() public {
owner = msg.sender;
}
function startPresale() external onlyOwner{
require(!isPresaleOpen, "Presale is open");
isPresaleOpen = true;
}
function closePrsale() external onlyOwner{
require(isPresaleOpen, "Presale is not open yet.");
isPresaleOpen = false;
}
function setTokenAddress(address token) external onlyOwner {
require(tokenAddress == address(0), "Token address is already set.");
require(token != address(0), "Token address zero not allowed.");
tokenAddress = token;
}
function setTokenDecimals(uint256 decimals) external onlyOwner {
tokenDecimals = decimals;
}
function setMinEthLimit(uint256 amount) external onlyOwner {
minEthLimit = amount;
}
function setMaxEthLimit(uint256 amount) external onlyOwner {
maxEthLimit = amount;
}
function setTokenRatePerEth(uint256 rate) external onlyOwner {
tokenRatePerEth = rate;
}
function setRateDecimals(uint256 decimals) external onlyOwner {
rateDecimals = decimals;
}
receive() external payable{
require(isPresaleOpen, "Presale is not open.");
require(
usersInvestments[msg.sender].add(msg.value) <= maxEthLimit
&& usersInvestments[msg.sender].add(msg.value) >= minEthLimit,
"Installment Invalid."
);
uint256 tokenAmount = getTokensPerEth(msg.value);
require(IToken(tokenAddress).transfer(msg.sender, tokenAmount), "Insufficient balance of presale contract!");
usersInvestments[msg.sender] = usersInvestments[msg.sender].add(msg.value);
owner.transfer(msg.value);
}
function getTokensPerEth(uint256 amount) internal view returns(uint256) {
return amount.mul(tokenRatePerEth).div(
10**(uint256(18).sub(tokenDecimals).add(rateDecimals))
);
}
function burnUnsoldTokens() external onlyOwner {
require(!isPresaleOpen, "You cannot burn tokens untitl the presale is closed.");
IToken(tokenAddress).burnTokens(IToken(tokenAddress).balanceOf(address(this)));
}
function getUnsoldTokens() external onlyOwner {
require(!isPresaleOpen, "You cannot get tokens until the presale is closed.");
IToken(tokenAddress).transfer(owner, IToken(tokenAddress).balanceOf(address(this)) );
}
}
| 16,519,268
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./full_match/1/0xA05F7363d32d96A611bdF252379d3719964ECA02/sources/contracts/FloorJackv1.sol
|
called when someone wants to buy a token held by the contract
|
function buy(uint256 _tokenId) payable external {
uint256 price = floorPrice + floorMarkup;
require(msg.value == price, "Check price");
require(ownedTokenIDs[_tokenId] == true, "Token not available");
ownedTokenIDs[_tokenId] = false;
emit NFTBought(msg.sender, price);
_payCommission(price);
collectionContract.safeTransferFrom(address(this), msg.sender, _tokenId);
}
| 17,151,861
|
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// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;
/**
* @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);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @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.
*
* _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;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.5.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.5.0;
/**
* @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 ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.5.0;
/*
* @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.
*/
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;
}
}
// File: @openzeppelin/contracts/ownership/Ownable.sol
pragma solidity ^0.5.0;
/**
* @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.
*
* 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(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _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 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 onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/interfaces/CETH.sol
pragma solidity 0.5.16;
interface CETH {
function mint() payable external;
function redeem(uint redeemTokens) external returns (uint);
function comptroller() external view returns (address);
function exchangeRateStored() external view returns (uint256);
function supplyRatePerBlock() external view returns (uint256);
function borrowRatePerBlock() external view returns (uint256);
function totalReserves() external view returns (uint256);
function getCash() external view returns (uint256);
function totalBorrows() external view returns (uint256);
function reserveFactorMantissa() external view returns (uint256);
function interestRateModel() external view returns (address);
}
// File: contracts/interfaces/IWETH.sol
pragma solidity 0.5.16;
interface IWETH {
function getBaseVariableBorrowRate() external view returns (uint256);
function deposit() external payable;
function withdraw(uint wad) external;
function balanceOf(address) external view;
}
// File: contracts/interfaces/ILendingProtocol.sol
pragma solidity 0.5.16;
interface ILendingProtocol {
function mint() external returns (uint256);
function redeem(address account) external returns (uint256);
function nextSupplyRate(uint256 amount) external view returns (uint256);
function nextSupplyRateWithParams(uint256[] calldata params) external view returns (uint256);
function getAPR() external view returns (uint256);
function getPriceInToken() external view returns (uint256);
function token() external view returns (address);
function underlying() external view returns (address);
function availableLiquidity() external view returns (uint256);
}
// File: contracts/interfaces/WhitePaperInterestRateModel.sol
pragma solidity 0.5.16;
interface WhitePaperInterestRateModel {
function getBorrowRate(uint256 cash, uint256 borrows, uint256 _reserves) external view returns (uint256, uint256);
function getSupplyRate(uint256 cash, uint256 borrows, uint256 reserves, uint256 reserveFactorMantissa) external view returns (uint256);
function multiplier() external view returns (uint256);
function baseRate() external view returns (uint256);
function blocksPerYear() external view returns (uint256);
function dsrPerBlock() external view returns (uint256);
}
// File: contracts/wrappers/IdleCompoundETH.sol
/**
* @title: Compound wrapper
* @summary: Used for interacting with Compound. Has
* a common interface with all other protocol wrappers.
* This contract holds assets only during a tx, after tx it should be empty
* @author: Idle Labs Inc., idle.finance
*/
pragma solidity 0.5.16;
contract IdleCompoundETH is ILendingProtocol, Ownable {
using SafeERC20 for IERC20;
using SafeMath for uint256;
// protocol token cETH address
address public token;
// underlying token WETH address
address public underlying;
address public idleToken;
uint256 public blocksPerYear;
address public constant weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
/**
* @param _token : cToken address
* @param _underlying : underlying token (eg DAI) address
* @param _idleToken : idleToken token (eg DAI) address
*/
constructor(address _token, address _underlying, address _idleToken) public {
require(_token != address(0) && _underlying != address(0) && _idleToken != address(0), 'COMP: some addr is 0');
token = _token;
underlying = _underlying;
idleToken = _idleToken;
blocksPerYear = 2371428;
// IERC20(_underlying).safeApprove(_token, uint256(-1));
}
/**
* Throws if called by any account other than IdleToken contract.
*/
modifier onlyIdle() {
require(msg.sender == idleToken, "Ownable: caller is not IdleToken");
_;
}
// onlyOwner
/**
* sets idleToken address
* NOTE: can be called only once. It's not on the constructor because we are deploying this contract
* after the IdleToken contract
* @param _idleToken : idleToken address
*/
function setIdleToken(address _idleToken)
external onlyOwner {
require(idleToken == address(0), "idleToken addr already set");
require(_idleToken != address(0), "_idleToken addr is 0");
idleToken = _idleToken;
}
/**
* sets blocksPerYear address
*
* @param _blocksPerYear : avg blocks per year
*/
function setBlocksPerYear(uint256 _blocksPerYear)
external onlyOwner {
require(_blocksPerYear != 0, "_blocksPerYear is 0");
blocksPerYear = _blocksPerYear;
}
// end onlyOwner
/**
* Calculate next supply rate for Compound, given an `_amount` supplied (last array param)
* and all other params supplied. See `info_compound.md` for more info
* on calculations.
*
* @param params : array with all params needed for calculation (see below)
* @return : yearly net rate
*/
function nextSupplyRateWithParams(uint256[] memory params)
public view
returns (uint256) {
/*
This comment is a reference for params name
This gives stack too deep so check implementation below
uint256 j = params[0]; // 10 ** 18;
uint256 a = params[1]; // white.baseRate(); // from WhitePaper
uint256 b = params[2]; // cToken.totalBorrows();
uint256 c = params[3]; // white.multiplier(); // from WhitePaper
uint256 d = params[4]; // cToken.totalReserves();
uint256 e = params[5]; // j.sub(cToken.reserveFactorMantissa());
uint256 s = params[6]; // cToken.getCash();
uint256 k = params[7]; // white.blocksPerYear();
uint256 f = params[8]; // 100;
uint256 x = params[9]; // newAmountSupplied;
// q = ((((a + (b*c)/(b + s + x)) / k) * e * b / (s + x + b - d)) / j) * k * f -> to get yearly rate
nextRate = a.add(b.mul(c).div(b.add(s).add(x))).div(k).mul(e).mul(b).div(
s.add(x).add(b).sub(d)
).div(j).mul(k).mul(f); // to get the yearly rate
*/
// (b*c)/(b + s + x)
uint256 inter1 = params[2].mul(params[3]).div(params[2].add(params[6]).add(params[9]));
// (s + x + b - d)
uint256 inter2 = params[6].add(params[9]).add(params[2]).sub(params[4]);
// ((a + (b*c)/(b + s + x)) / k) * e
uint256 inter3 = params[1].add(inter1).div(params[7]).mul(params[5]);
// ((((a + (b*c)/(b + s + x)) / k) * e * b / (s + x + b - d)) / j) * k * f
return inter3.mul(params[2]).div(inter2).div(params[0]).mul(params[7]).mul(params[8]);
}
/**
* Calculate next supply rate for Compound, given an `_amount` supplied
*
* @param _amount : new underlying amount supplied (eg DAI)
* @return : yearly net rate
*/
function nextSupplyRate(uint256 _amount)
external view
returns (uint256) {
CETH cToken = CETH(token);
WhitePaperInterestRateModel white = WhitePaperInterestRateModel(cToken.interestRateModel());
uint256[] memory params = new uint256[](10);
params[0] = 10**18; // j
params[1] = white.baseRate(); // a
params[2] = cToken.totalBorrows(); // b
params[3] = white.multiplier(); // c
params[4] = cToken.totalReserves(); // d
params[5] = params[0].sub(cToken.reserveFactorMantissa()); // e
params[6] = cToken.getCash(); // s
params[7] = blocksPerYear; // k
params[8] = 100; // f
params[9] = _amount; // x
// q = ((((a + (b*c)/(b + s + x)) / k) * e * b / (s + x + b - d)) / j) * k * f -> to get yearly rate
return nextSupplyRateWithParams(params);
}
/**
* @return current price of cToken in underlying
*/
function getPriceInToken()
external view
returns (uint256) {
return CETH(token).exchangeRateStored();
}
/**
* @return apr : current yearly net rate
*/
function getAPR()
external view
returns (uint256 apr) {
CETH cToken = CETH(token);
uint256 cRate = cToken.supplyRatePerBlock(); // interest % per block
apr = cRate.mul(blocksPerYear).mul(100);
}
/**
* Gets all underlying tokens in this contract and mints cTokens
* tokens are then transferred to msg.sender
* NOTE: underlying tokens needs to be sended here before calling this
*
* @return cTokens minted
*/
function mint()
external onlyIdle
returns (uint256 cTokens) {
uint256 balance = IERC20(underlying).balanceOf(address(this));
if (balance == 0) {
return cTokens;
}
// convert weth to eth
IWETH(weth).withdraw(balance);
// get a handle for the corresponding cToken contract
CETH _cToken = CETH(token);
// mint the cTokens and assert there is no error
_cToken.mint.value(address(this).balance)();
// cTokens are now in this contract
cTokens = IERC20(token).balanceOf(address(this));
// transfer them to the caller
IERC20(token).safeTransfer(msg.sender, cTokens);
}
/**
* Gets all cTokens in this contract and redeems underlying tokens.
* underlying tokens are then transferred to `_account`
* NOTE: cTokens needs to be sended here before calling this
*
* @return underlying tokens redeemd
*/
function redeem(address _account)
external onlyIdle
returns (uint256 tokens) {
// Funds needs to be sended here before calling this
CETH _cToken = CETH(token);
IERC20 _underlying = IERC20(underlying);
// redeem all underlying sent in this contract
require(_cToken.redeem(IERC20(token).balanceOf(address(this))) == 0, "Error redeeming cTokens");
// convert ETH to WETH
IWETH(weth).deposit.value(address(this).balance)();
tokens = _underlying.balanceOf(address(this));
_underlying.safeTransfer(_account, tokens);
}
/**
* Get available liquidity
*
* @return available liquidity
*/
function availableLiquidity() external view returns (uint256) {
return CETH(token).getCash();
}
/**
* Fallback to receive ether
*/
function() external payable {}
}
|
mint the cTokens and assert there is no error
|
_cToken.mint.value(address(this).balance)();
| 10,418,648
|
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./full_match/40/0x3f7Bcc8F5B0e720a798b464A29126197E9292a15/sources/contracts/ZappyAVAXwTLOS.sol
|
Modular function to set the transaction path output-lpToken0
|
function setWrappedToLp1Path(address[] memory _path) external onlyAdmin {
require (_path[0] == output && _path[_path.length - 1] == avax, "!path");
wrappedToLp1Path = _path;
emit SetOutputToLp1Path(_path);
}
| 9,549,385
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./full_match/80001/0xFdEB246f818404b8F3c9a8aD88b7fe3d6D809f72/sources/contracts/PledgeStakeV2.sol
|
Update rewards after unstaking
|
_updateRewards(msg.sender);
| 5,598,510
|
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// SPDX-License-Identifier: MIT
// Smart Contract Written by: Ian Olson
pragma solidity ^0.8.4;
pragma abicoder v2;
contract DummyContract {
// ---
// Properties
// ---
address private _payoutAddress;
// ---
// Mappings
// ---
mapping(address => bool) isAdmin;
// ---
// Modifiers
// ---
modifier onlyAdmin() {
require(isAdmin[msg.sender], "Only admins.");
_;
}
// ---
// Constructor
// ---
constructor() {
_payoutAddress = msg.sender;
isAdmin[msg.sender] = true; // imnotArt Deployer Address
}
// ---
// Receive Payments
// ---
// @dev Receive ETH - to test out existing .transfer() methods calling a better proxy contract
// @author Ian Olson
receive() payable external {
require(msg.value > 0, "Must send more than 0.");
payable(_payoutAddress).transfer(msg.value);
}
// ---
// Get Functions
// ---
// @dev Get the payout address
// @author Ian Olson
function payoutAddress() public view returns (address) {
return _payoutAddress;
}
// ---
// Update Functions
// ---
// @dev Update the payout address.
// @author Ian Olson
function updatePayoutAddress(address payoutAddress) public onlyAdmin {
_payoutAddress = payoutAddress;
}
// ---
// Withdraw
// ---
// @dev Withdraw the balance of the contract.
// @author Ian Olson
function withdraw() public onlyAdmin {
uint256 amount = address(this).balance;
require(amount > 0, "Contract balance empty.");
(bool success, ) = payable(msg.sender).call{value: amount}("");
require(success, "Transfer failed.");
}
}
|
@dev Update the payout address. @author Ian Olson
|
function updatePayoutAddress(address payoutAddress) public onlyAdmin {
_payoutAddress = payoutAddress;
}
| 7,692,463
|
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// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.6;
import "./libraries/Margin.sol";
import "./libraries/ReplicationMath.sol";
import "./libraries/Reserve.sol";
import "./libraries/SafeCast.sol";
import "./libraries/Transfers.sol";
import "./libraries/Units.sol";
import "./interfaces/callback/IPrimitiveCreateCallback.sol";
import "./interfaces/callback/IPrimitiveDepositCallback.sol";
import "./interfaces/callback/IPrimitiveLiquidityCallback.sol";
import "./interfaces/callback/IPrimitiveSwapCallback.sol";
import "./interfaces/IERC20.sol";
import "./interfaces/IPrimitiveEngine.sol";
import "./interfaces/IPrimitiveFactory.sol";
/// @title Primitive Engine
/// @author Primitive
/// @notice Replicating Market Maker
/// @dev RMM-01
contract PrimitiveEngine is IPrimitiveEngine {
using ReplicationMath for int128;
using Units for uint256;
using SafeCast for uint256;
using Reserve for mapping(bytes32 => Reserve.Data);
using Reserve for Reserve.Data;
using Margin for mapping(address => Margin.Data);
using Margin for Margin.Data;
using Transfers for IERC20;
/// @dev Parameters of each pool
/// @param strike Strike price of pool with stable token decimals
/// @param sigma Implied volatility, with 1e4 decimals such that 10000 = 100%
/// @param maturity Timestamp of pool expiration, in seconds
/// @param lastTimestamp Timestamp of the pool's last update, in seconds
/// @param gamma Multiplied against deltaIn amounts to apply swap fee, gamma = 1 - fee %, scaled up by 1e4
struct Calibration {
uint128 strike;
uint32 sigma;
uint32 maturity;
uint32 lastTimestamp;
uint32 gamma;
}
/// @inheritdoc IPrimitiveEngineView
uint256 public constant override PRECISION = 10**18;
/// @inheritdoc IPrimitiveEngineView
uint256 public constant override BUFFER = 120 seconds;
/// @inheritdoc IPrimitiveEngineView
uint256 public immutable override MIN_LIQUIDITY;
/// @inheritdoc IPrimitiveEngineView
uint256 public immutable override scaleFactorRisky;
/// @inheritdoc IPrimitiveEngineView
uint256 public immutable override scaleFactorStable;
/// @inheritdoc IPrimitiveEngineView
address public immutable override factory;
/// @inheritdoc IPrimitiveEngineView
address public immutable override risky;
/// @inheritdoc IPrimitiveEngineView
address public immutable override stable;
/// @dev Reentrancy guard initialized to state
uint256 private locked = 1;
/// @inheritdoc IPrimitiveEngineView
mapping(bytes32 => Calibration) public override calibrations;
/// @inheritdoc IPrimitiveEngineView
mapping(address => Margin.Data) public override margins;
/// @inheritdoc IPrimitiveEngineView
mapping(bytes32 => Reserve.Data) public override reserves;
/// @inheritdoc IPrimitiveEngineView
mapping(address => mapping(bytes32 => uint256)) public override liquidity;
modifier lock() {
if (locked != 1) revert LockedError();
locked = 2;
_;
locked = 1;
}
/// @notice Deploys an Engine with two tokens, a 'Risky' and 'Stable'
constructor() {
(factory, risky, stable, scaleFactorRisky, scaleFactorStable, MIN_LIQUIDITY) = IPrimitiveFactory(msg.sender)
.args();
}
/// @return Risky token balance of this contract
function balanceRisky() private view returns (uint256) {
(bool success, bytes memory data) = risky.staticcall(
abi.encodeWithSelector(IERC20.balanceOf.selector, address(this))
);
if (!success || data.length != 32) revert BalanceError();
return abi.decode(data, (uint256));
}
/// @return Stable token balance of this contract
function balanceStable() private view returns (uint256) {
(bool success, bytes memory data) = stable.staticcall(
abi.encodeWithSelector(IERC20.balanceOf.selector, address(this))
);
if (!success || data.length != 32) revert BalanceError();
return abi.decode(data, (uint256));
}
/// @notice Revert if expected amount does not exceed current balance
function checkRiskyBalance(uint256 expectedRisky) private view {
uint256 actualRisky = balanceRisky();
if (actualRisky < expectedRisky) revert RiskyBalanceError(expectedRisky, actualRisky);
}
/// @notice Revert if expected amount does not exceed current balance
function checkStableBalance(uint256 expectedStable) private view {
uint256 actualStable = balanceStable();
if (actualStable < expectedStable) revert StableBalanceError(expectedStable, actualStable);
}
/// @return blockTimestamp casted as a uint32
function _blockTimestamp() internal view virtual returns (uint32 blockTimestamp) {
// solhint-disable-next-line
blockTimestamp = uint32(block.timestamp);
}
/// @inheritdoc IPrimitiveEngineActions
function updateLastTimestamp(bytes32 poolId) external override lock returns (uint32 lastTimestamp) {
lastTimestamp = _updateLastTimestamp(poolId);
}
/// @notice Sets the lastTimestamp of `poolId` to `block.timestamp`, max value is `maturity`
/// @return lastTimestamp of the pool, used in calculating the time until expiry
function _updateLastTimestamp(bytes32 poolId) internal virtual returns (uint32 lastTimestamp) {
Calibration storage cal = calibrations[poolId];
if (cal.lastTimestamp == 0) revert UninitializedError();
lastTimestamp = _blockTimestamp();
uint32 maturity = cal.maturity;
if (lastTimestamp > maturity) lastTimestamp = maturity; // if expired, set to the maturity
cal.lastTimestamp = lastTimestamp; // set state
emit UpdateLastTimestamp(poolId);
}
/// @inheritdoc IPrimitiveEngineActions
function create(
uint128 strike,
uint32 sigma,
uint32 maturity,
uint32 gamma,
uint256 riskyPerLp,
uint256 delLiquidity,
bytes calldata data
)
external
override
lock
returns (
bytes32 poolId,
uint256 delRisky,
uint256 delStable
)
{
(uint256 factor0, uint256 factor1) = (scaleFactorRisky, scaleFactorStable);
poolId = keccak256(abi.encodePacked(address(this), strike, sigma, maturity, gamma));
if (calibrations[poolId].lastTimestamp != 0) revert PoolDuplicateError();
if (sigma > 1e7 || sigma < 1) revert SigmaError(sigma);
if (strike == 0) revert StrikeError(strike);
if (delLiquidity <= MIN_LIQUIDITY) revert MinLiquidityError(delLiquidity);
if (riskyPerLp > PRECISION / factor0 || riskyPerLp == 0) revert RiskyPerLpError(riskyPerLp);
if (gamma > Units.PERCENTAGE || gamma < 9000) revert GammaError(gamma);
Calibration memory cal = Calibration({
strike: strike,
sigma: sigma,
maturity: maturity,
lastTimestamp: _blockTimestamp(),
gamma: gamma
});
if (cal.lastTimestamp > cal.maturity) revert PoolExpiredError();
uint32 tau = cal.maturity - cal.lastTimestamp; // time until expiry
delStable = ReplicationMath.getStableGivenRisky(0, factor0, factor1, riskyPerLp, cal.strike, cal.sigma, tau);
delRisky = (riskyPerLp * delLiquidity) / PRECISION; // riskyDecimals * 1e18 decimals / 1e18 = riskyDecimals
delStable = (delStable * delLiquidity) / PRECISION;
if (delRisky == 0 || delStable == 0) revert CalibrationError(delRisky, delStable);
calibrations[poolId] = cal; // state update
uint256 amount = delLiquidity - MIN_LIQUIDITY;
liquidity[msg.sender][poolId] += amount; // burn min liquidity, at cost of msg.sender
reserves[poolId].allocate(delRisky, delStable, delLiquidity, cal.lastTimestamp); // state update
(uint256 balRisky, uint256 balStable) = (balanceRisky(), balanceStable());
IPrimitiveCreateCallback(msg.sender).createCallback(delRisky, delStable, data);
checkRiskyBalance(balRisky + delRisky);
checkStableBalance(balStable + delStable);
emit Create(msg.sender, cal.strike, cal.sigma, cal.maturity, cal.gamma, delRisky, delStable, amount);
}
// ===== Margin =====
/// @inheritdoc IPrimitiveEngineActions
function deposit(
address recipient,
uint256 delRisky,
uint256 delStable,
bytes calldata data
) external override lock {
if (delRisky == 0 && delStable == 0) revert ZeroDeltasError();
margins[recipient].deposit(delRisky, delStable); // state update
uint256 balRisky;
uint256 balStable;
if (delRisky != 0) balRisky = balanceRisky();
if (delStable != 0) balStable = balanceStable();
IPrimitiveDepositCallback(msg.sender).depositCallback(delRisky, delStable, data); // agnostic payment
if (delRisky != 0) checkRiskyBalance(balRisky + delRisky);
if (delStable != 0) checkStableBalance(balStable + delStable);
emit Deposit(msg.sender, recipient, delRisky, delStable);
}
/// @inheritdoc IPrimitiveEngineActions
function withdraw(
address recipient,
uint256 delRisky,
uint256 delStable
) external override lock {
if (delRisky == 0 && delStable == 0) revert ZeroDeltasError();
margins.withdraw(delRisky, delStable); // state update
if (delRisky != 0) IERC20(risky).safeTransfer(recipient, delRisky);
if (delStable != 0) IERC20(stable).safeTransfer(recipient, delStable);
emit Withdraw(msg.sender, recipient, delRisky, delStable);
}
// ===== Liquidity =====
/// @inheritdoc IPrimitiveEngineActions
function allocate(
bytes32 poolId,
address recipient,
uint256 delRisky,
uint256 delStable,
bool fromMargin,
bytes calldata data
) external override lock returns (uint256 delLiquidity) {
if (delRisky == 0 || delStable == 0) revert ZeroDeltasError();
Reserve.Data storage reserve = reserves[poolId];
if (reserve.blockTimestamp == 0) revert UninitializedError();
uint32 timestamp = _blockTimestamp();
uint256 liquidity0 = (delRisky * reserve.liquidity) / uint256(reserve.reserveRisky);
uint256 liquidity1 = (delStable * reserve.liquidity) / uint256(reserve.reserveStable);
delLiquidity = liquidity0 < liquidity1 ? liquidity0 : liquidity1;
if (delLiquidity == 0) revert ZeroLiquidityError();
liquidity[recipient][poolId] += delLiquidity; // increase position liquidity
reserve.allocate(delRisky, delStable, delLiquidity, timestamp); // increase reserves and liquidity
if (fromMargin) {
margins.withdraw(delRisky, delStable); // removes tokens from `msg.sender` margin account
} else {
(uint256 balRisky, uint256 balStable) = (balanceRisky(), balanceStable());
IPrimitiveLiquidityCallback(msg.sender).allocateCallback(delRisky, delStable, data); // agnostic payment
checkRiskyBalance(balRisky + delRisky);
checkStableBalance(balStable + delStable);
}
emit Allocate(msg.sender, recipient, poolId, delRisky, delStable, delLiquidity);
}
/// @inheritdoc IPrimitiveEngineActions
function remove(bytes32 poolId, uint256 delLiquidity)
external
override
lock
returns (uint256 delRisky, uint256 delStable)
{
if (delLiquidity == 0) revert ZeroLiquidityError();
Reserve.Data storage reserve = reserves[poolId];
if (reserve.blockTimestamp == 0) revert UninitializedError();
(delRisky, delStable) = reserve.getAmounts(delLiquidity);
liquidity[msg.sender][poolId] -= delLiquidity; // state update
reserve.remove(delRisky, delStable, delLiquidity, _blockTimestamp());
margins[msg.sender].deposit(delRisky, delStable);
emit Remove(msg.sender, poolId, delRisky, delStable, delLiquidity);
}
struct SwapDetails {
address recipient;
bool riskyForStable;
bool fromMargin;
bool toMargin;
uint32 timestamp;
bytes32 poolId;
uint256 deltaIn;
uint256 deltaOut;
}
/// @inheritdoc IPrimitiveEngineActions
function swap(
address recipient,
bytes32 poolId,
bool riskyForStable,
uint256 deltaIn,
uint256 deltaOut,
bool fromMargin,
bool toMargin,
bytes calldata data
) external override lock {
if (deltaIn == 0) revert DeltaInError();
if (deltaOut == 0) revert DeltaOutError();
SwapDetails memory details = SwapDetails({
recipient: recipient,
poolId: poolId,
deltaIn: deltaIn,
deltaOut: deltaOut,
riskyForStable: riskyForStable,
fromMargin: fromMargin,
toMargin: toMargin,
timestamp: _blockTimestamp()
});
uint32 lastTimestamp = _updateLastTimestamp(details.poolId); // updates lastTimestamp of `poolId`
if (details.timestamp > lastTimestamp + BUFFER) revert PoolExpiredError(); // 120s buffer to allow final swaps
int128 invariantX64 = invariantOf(details.poolId); // stored in memory to perform the invariant check
{
// swap scope, avoids stack too deep errors
Calibration memory cal = calibrations[details.poolId];
Reserve.Data storage reserve = reserves[details.poolId];
uint32 tau = cal.maturity - cal.lastTimestamp;
uint256 deltaInWithFee = (details.deltaIn * cal.gamma) / Units.PERCENTAGE; // amount * (1 - fee %)
uint256 adjustedRisky;
uint256 adjustedStable;
if (details.riskyForStable) {
adjustedRisky = uint256(reserve.reserveRisky) + deltaInWithFee;
adjustedStable = uint256(reserve.reserveStable) - deltaOut;
} else {
adjustedRisky = uint256(reserve.reserveRisky) - deltaOut;
adjustedStable = uint256(reserve.reserveStable) + deltaInWithFee;
}
adjustedRisky = (adjustedRisky * PRECISION) / reserve.liquidity;
adjustedStable = (adjustedStable * PRECISION) / reserve.liquidity;
int128 invariantAfter = ReplicationMath.calcInvariant(
scaleFactorRisky,
scaleFactorStable,
adjustedRisky,
adjustedStable,
cal.strike,
cal.sigma,
tau
);
if (invariantX64 > invariantAfter) revert InvariantError(invariantX64, invariantAfter);
reserve.swap(details.riskyForStable, details.deltaIn, details.deltaOut, details.timestamp); // state update
}
if (details.riskyForStable) {
if (details.toMargin) {
margins[details.recipient].deposit(0, details.deltaOut);
} else {
IERC20(stable).safeTransfer(details.recipient, details.deltaOut); // optimistic transfer out
}
if (details.fromMargin) {
margins.withdraw(details.deltaIn, 0); // pay for swap
} else {
uint256 balRisky = balanceRisky();
IPrimitiveSwapCallback(msg.sender).swapCallback(details.deltaIn, 0, data); // agnostic transfer in
checkRiskyBalance(balRisky + details.deltaIn);
}
} else {
if (details.toMargin) {
margins[details.recipient].deposit(details.deltaOut, 0);
} else {
IERC20(risky).safeTransfer(details.recipient, details.deltaOut); // optimistic transfer out
}
if (details.fromMargin) {
margins.withdraw(0, details.deltaIn); // pay for swap
} else {
uint256 balStable = balanceStable();
IPrimitiveSwapCallback(msg.sender).swapCallback(0, details.deltaIn, data); // agnostic transfer in
checkStableBalance(balStable + details.deltaIn);
}
}
emit Swap(
msg.sender,
details.recipient,
details.poolId,
details.riskyForStable,
details.deltaIn,
details.deltaOut
);
}
// ===== View =====
/// @inheritdoc IPrimitiveEngineView
function invariantOf(bytes32 poolId) public view override returns (int128 invariant) {
Calibration memory cal = calibrations[poolId];
uint32 tau = cal.maturity - cal.lastTimestamp; // cal maturity can never be less than lastTimestamp
(uint256 riskyPerLiquidity, uint256 stablePerLiquidity) = reserves[poolId].getAmounts(PRECISION); // 1e18 liquidity
invariant = ReplicationMath.calcInvariant(
scaleFactorRisky,
scaleFactorStable,
riskyPerLiquidity,
stablePerLiquidity,
cal.strike,
cal.sigma,
tau
);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.0;
import "./SafeCast.sol";
/// @title Margin Library
/// @author Primitive
/// @dev Uses a data struct with two uint128s to optimize for one storage slot
library Margin {
using SafeCast for uint256;
struct Data {
uint128 balanceRisky; // Balance of the risky token, aka underlying asset
uint128 balanceStable; // Balance of the stable token, aka "quote" asset
}
/// @notice Adds to risky and stable token balances
/// @param margin Margin data of an account in storage to manipulate
/// @param delRisky Amount of risky tokens to add to margin
/// @param delStable Amount of stable tokens to add to margin
function deposit(
Data storage margin,
uint256 delRisky,
uint256 delStable
) internal {
if (delRisky != 0) margin.balanceRisky += delRisky.toUint128();
if (delStable != 0) margin.balanceStable += delStable.toUint128();
}
/// @notice Removes risky and stable token balance from `msg.sender`'s internal margin account
/// @param margins Margin data mapping, uses `msg.sender`'s margin account
/// @param delRisky Amount of risky tokens to subtract from margin
/// @param delStable Amount of stable tokens to subtract from margin
/// @return margin Data storage of a margin account
function withdraw(
mapping(address => Data) storage margins,
uint256 delRisky,
uint256 delStable
) internal returns (Data storage margin) {
margin = margins[msg.sender];
if (delRisky != 0) margin.balanceRisky -= delRisky.toUint128();
if (delStable != 0) margin.balanceStable -= delStable.toUint128();
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.4;
import "./ABDKMath64x64.sol";
import "./CumulativeNormalDistribution.sol";
import "./Units.sol";
/// @title Replication Math
/// @author Primitive
/// @notice Alex Evans, Guillermo Angeris, and Tarun Chitra. Replicating Market Makers.
/// https://stanford.edu/~guillean/papers/rmms.pdf
library ReplicationMath {
using ABDKMath64x64 for int128;
using ABDKMath64x64 for uint256;
using CumulativeNormalDistribution for int128;
using Units for int128;
using Units for uint256;
int128 internal constant ONE_INT = 0x10000000000000000;
/// @notice Normalizes volatility with respect to square root of time until expiry
/// @param sigma Unsigned 256-bit percentage as an integer with precision of 1e4, 10000 = 100%
/// @param tau Time until expiry in seconds as an unsigned 256-bit integer
/// @return vol Signed fixed point 64.64 number equal to sigma * sqrt(tau)
function getProportionalVolatility(uint256 sigma, uint256 tau) internal pure returns (int128 vol) {
int128 sqrtTauX64 = tau.toYears().sqrt();
int128 sigmaX64 = sigma.percentageToX64();
vol = sigmaX64.mul(sqrtTauX64);
}
/// @notice Uses riskyPerLiquidity and invariant to calculate stablePerLiquidity
/// @dev Converts unsigned 256-bit values to fixed point 64.64 numbers w/ decimals of precision
/// @param invariantLastX64 Signed 64.64 fixed point number. Calculated w/ same `tau` as the parameter `tau`
/// @param scaleFactorRisky Unsigned 256-bit integer scaling factor for `risky`, 10^(18 - risky.decimals())
/// @param scaleFactorStable Unsigned 256-bit integer scaling factor for `stable`, 10^(18 - stable.decimals())
/// @param riskyPerLiquidity Unsigned 256-bit integer of Pool's risky reserves *per liquidity*, 0 <= x <= 1
/// @param strike Unsigned 256-bit integer value with precision equal to 10^(18 - scaleFactorStable)
/// @param sigma Volatility of the Pool as an unsigned 256-bit integer w/ precision of 1e4, 10000 = 100%
/// @param tau Time until expiry in seconds as an unsigned 256-bit integer
/// @return stablePerLiquidity = K*CDF(CDF^-1(1 - riskyPerLiquidity) - sigma*sqrt(tau)) + invariantLastX64 as uint
function getStableGivenRisky(
int128 invariantLastX64,
uint256 scaleFactorRisky,
uint256 scaleFactorStable,
uint256 riskyPerLiquidity,
uint256 strike,
uint256 sigma,
uint256 tau
) internal pure returns (uint256 stablePerLiquidity) {
int128 strikeX64 = strike.scaleToX64(scaleFactorStable);
int128 riskyX64 = riskyPerLiquidity.scaleToX64(scaleFactorRisky); // mul by 2^64, div by precision
int128 oneMinusRiskyX64 = ONE_INT.sub(riskyX64);
if (tau != 0) {
int128 volX64 = getProportionalVolatility(sigma, tau);
int128 phi = oneMinusRiskyX64.getInverseCDF();
int128 input = phi.sub(volX64);
int128 stableX64 = strikeX64.mul(input.getCDF()).add(invariantLastX64);
stablePerLiquidity = stableX64.scaleFromX64(scaleFactorStable);
} else {
stablePerLiquidity = (strikeX64.mul(oneMinusRiskyX64).add(invariantLastX64)).scaleFromX64(
scaleFactorStable
);
}
}
/// @notice Calculates the invariant of a curve
/// @dev Per unit of replication, aka per unit of liquidity
/// @param scaleFactorRisky Unsigned 256-bit integer scaling factor for `risky`, 10^(18 - risky.decimals())
/// @param scaleFactorStable Unsigned 256-bit integer scaling factor for `stable`, 10^(18 - stable.decimals())
/// @param riskyPerLiquidity Unsigned 256-bit integer of Pool's risky reserves *per liquidity*, 0 <= x <= 1
/// @param stablePerLiquidity Unsigned 256-bit integer of Pool's stable reserves *per liquidity*, 0 <= x <= strike
/// @return invariantX64 = stablePerLiquidity - K * CDF(CDF^-1(1 - riskyPerLiquidity) - sigma * sqrt(tau))
function calcInvariant(
uint256 scaleFactorRisky,
uint256 scaleFactorStable,
uint256 riskyPerLiquidity,
uint256 stablePerLiquidity,
uint256 strike,
uint256 sigma,
uint256 tau
) internal pure returns (int128 invariantX64) {
uint256 output = getStableGivenRisky(
0,
scaleFactorRisky,
scaleFactorStable,
riskyPerLiquidity,
strike,
sigma,
tau
);
int128 outputX64 = output.scaleToX64(scaleFactorStable);
int128 stableX64 = stablePerLiquidity.scaleToX64(scaleFactorStable);
invariantX64 = stableX64.sub(outputX64);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.0;
import "./SafeCast.sol";
/// @title Reserves Library
/// @author Primitive
/// @dev Data structure library for an Engine's Reserves
library Reserve {
using SafeCast for uint256;
/// @notice Stores global state of a pool
/// @param reserveRisky Risky token reserve
/// @param reserveStable Stable token reserve
/// @param liquidity Total supply of liquidity
/// @param blockTimestamp Last timestamp of which updated the accumulators
/// @param cumulativeRisky Cumulative sum of the risky reserves
/// @param cumulativeStable Cumulative sum of stable reserves
/// @param cumulativeLiquidity Cumulative sum of total liquidity supply
struct Data {
uint128 reserveRisky;
uint128 reserveStable;
uint128 liquidity;
uint32 blockTimestamp;
uint256 cumulativeRisky;
uint256 cumulativeStable;
uint256 cumulativeLiquidity;
}
/// @notice Adds to the cumulative reserves
/// @dev Overflow is desired on the cumulative values
/// @param res Reserve storage to update
/// @param blockTimestamp Checkpoint timestamp of update
function update(Data storage res, uint32 blockTimestamp) internal {
uint32 deltaTime = blockTimestamp - res.blockTimestamp;
// overflow is desired
if (deltaTime != 0) {
unchecked {
res.cumulativeRisky += uint256(res.reserveRisky) * deltaTime;
res.cumulativeStable += uint256(res.reserveStable) * deltaTime;
res.cumulativeLiquidity += uint256(res.liquidity) * deltaTime;
}
res.blockTimestamp = blockTimestamp;
}
}
/// @notice Increases one reserve value and decreases the other
/// @param reserve Reserve state to update
/// @param riskyForStable Direction of swap
/// @param deltaIn Amount of tokens paid, increases one reserve by
/// @param deltaOut Amount of tokens sent out, decreases the other reserve by
/// @param blockTimestamp Timestamp used to update cumulative reserves
function swap(
Data storage reserve,
bool riskyForStable,
uint256 deltaIn,
uint256 deltaOut,
uint32 blockTimestamp
) internal {
update(reserve, blockTimestamp);
if (riskyForStable) {
reserve.reserveRisky += deltaIn.toUint128();
reserve.reserveStable -= deltaOut.toUint128();
} else {
reserve.reserveRisky -= deltaOut.toUint128();
reserve.reserveStable += deltaIn.toUint128();
}
}
/// @notice Add to both reserves and total supply of liquidity
/// @param reserve Reserve storage to manipulate
/// @param delRisky Amount of risky tokens to add to the reserve
/// @param delStable Amount of stable tokens to add to the reserve
/// @param delLiquidity Amount of liquidity created with the provided tokens
/// @param blockTimestamp Timestamp used to update cumulative reserves
function allocate(
Data storage reserve,
uint256 delRisky,
uint256 delStable,
uint256 delLiquidity,
uint32 blockTimestamp
) internal {
update(reserve, blockTimestamp);
reserve.reserveRisky += delRisky.toUint128();
reserve.reserveStable += delStable.toUint128();
reserve.liquidity += delLiquidity.toUint128();
}
/// @notice Remove from both reserves and total supply of liquidity
/// @param reserve Reserve storage to manipulate
/// @param delRisky Amount of risky tokens to remove to the reserve
/// @param delStable Amount of stable tokens to remove to the reserve
/// @param delLiquidity Amount of liquidity removed from total supply
/// @param blockTimestamp Timestamp used to update cumulative reserves
function remove(
Data storage reserve,
uint256 delRisky,
uint256 delStable,
uint256 delLiquidity,
uint32 blockTimestamp
) internal {
update(reserve, blockTimestamp);
reserve.reserveRisky -= delRisky.toUint128();
reserve.reserveStable -= delStable.toUint128();
reserve.liquidity -= delLiquidity.toUint128();
}
/// @notice Calculates risky and stable token amounts of `delLiquidity`
/// @param reserve Reserve in memory to use reserves and liquidity of
/// @param delLiquidity Amount of liquidity to fetch underlying tokens of
/// @return delRisky Amount of risky tokens controlled by `delLiquidity`
/// @return delStable Amount of stable tokens controlled by `delLiquidity`
function getAmounts(Data memory reserve, uint256 delLiquidity)
internal
pure
returns (uint256 delRisky, uint256 delStable)
{
uint256 liq = uint256(reserve.liquidity);
delRisky = (delLiquidity * uint256(reserve.reserveRisky)) / liq;
delStable = (delLiquidity * uint256(reserve.reserveStable)) / liq;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title SafeCast
/// @notice Safely cast between uint256 and uint128
library SafeCast {
/// @notice reverts if x > type(uint128).max
function toUint128(uint256 x) internal pure returns (uint128 z) {
require(x <= type(uint128).max);
z = uint128(x);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.6.0;
import "../interfaces/IERC20.sol";
/// @title Transfers
library Transfers {
/// @notice Performs an ERC20 `transfer` call and checks return data
/// @param token ERC20 token to transfer
/// @param to Recipient of the ERC20 token
/// @param value Amount of ERC20 to transfer
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
(bool success, bytes memory returnData) = address(token).call(
abi.encodeWithSelector(token.transfer.selector, to, value)
);
require(success && (returnData.length == 0 || abi.decode(returnData, (bool))), "Transfer fail");
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
import "./ABDKMath64x64.sol";
/// @title Units library
/// @author Primitive
/// @notice Utility functions for unit conversions
library Units {
using ABDKMath64x64 for int128;
using ABDKMath64x64 for uint256;
uint256 internal constant YEAR = 31556952; // 365.24219 ephemeris day = 1 year, in seconds
uint256 internal constant PRECISION = 1e18; // precision to scale to
uint256 internal constant PERCENTAGE = 1e4; // precision of percentages
// ===== Unit Conversion =====
/// @notice Scales a wei value to a precision of 1e18 using the scaling factor
/// @param value Unsigned 256-bit wei amount to convert with native decimals
/// @param factor Scaling factor to multiply by, i.e. 10^(18 - value.decimals())
/// @return y Unsigned 256-bit wei amount scaled to a precision of 1e18
function scaleUp(uint256 value, uint256 factor) internal pure returns (uint256 y) {
y = value * factor;
}
/// @notice Scales a wei value from a precision of 1e18 to 10^(18 - precision)
/// @param value Unsigned 256-bit wei amount with 18 decimals
/// @param factor Scaling factor to divide by, i.e. 10^(18 - value.decimals())
/// @return y Unsigned 256-bit wei amount scaled to 10^(18 - factor)
function scaleDown(uint256 value, uint256 factor) internal pure returns (uint256 y) {
y = value / factor;
}
/// @notice Converts unsigned 256-bit wei value into a fixed point 64.64 number
/// @param value Unsigned 256-bit wei amount, in native precision
/// @param factor Scaling factor for `value`, used to calculate decimals of `value`
/// @return y Signed 64.64 fixed point number scaled from native precision
function scaleToX64(uint256 value, uint256 factor) internal pure returns (int128 y) {
uint256 scaleFactor = PRECISION / factor;
y = value.divu(scaleFactor);
}
/// @notice Converts signed fixed point 64.64 number into unsigned 256-bit wei value
/// @param value Signed fixed point 64.64 number to convert from precision of 10^18
/// @param factor Scaling factor for `value`, used to calculate decimals of `value`
/// @return y Unsigned 256-bit wei amount scaled to native precision of 10^(18 - factor)
function scaleFromX64(int128 value, uint256 factor) internal pure returns (uint256 y) {
uint256 scaleFactor = PRECISION / factor;
y = value.mulu(scaleFactor);
}
/// @notice Converts denormalized percentage integer to a fixed point 64.64 number
/// @dev Convert unsigned 256-bit integer number into signed 64.64 fixed point number
/// @param denorm Unsigned percentage integer with precision of 1e4
/// @return Signed 64.64 fixed point percentage with precision of 1e4
function percentageToX64(uint256 denorm) internal pure returns (int128) {
return denorm.divu(PERCENTAGE);
}
/// @notice Converts unsigned seconds integer into years as a signed 64.64 fixed point number
/// @dev Convert unsigned 256-bit integer number into signed 64.64 fixed point number
/// @param s Unsigned 256-bit integer amount of seconds to convert into year units
/// @return Fixed point 64.64 number of years equal to `seconds`
function toYears(uint256 s) internal pure returns (int128) {
return s.divu(YEAR);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title Primitive Create Callback
/// @author Primitive
interface IPrimitiveCreateCallback {
/// @notice Triggered when creating a new pool for an Engine
/// @param delRisky Amount of risky tokens required to initialize risky reserve
/// @param delStable Amount of stable tokens required to initialize stable reserve
/// @param data Calldata passed on create function call
function createCallback(
uint256 delRisky,
uint256 delStable,
bytes calldata data
) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title Primitive Deposit Callback
/// @author Primitive
interface IPrimitiveDepositCallback {
/// @notice Triggered when depositing tokens to an Engine
/// @param delRisky Amount of risky tokens required to deposit to risky margin balance
/// @param delStable Amount of stable tokens required to deposit to stable margin balance
/// @param data Calldata passed on deposit function call
function depositCallback(
uint256 delRisky,
uint256 delStable,
bytes calldata data
) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title Primitive Liquidity Callback
/// @author Primitive
interface IPrimitiveLiquidityCallback {
/// @notice Triggered when providing liquidity to an Engine
/// @param delRisky Amount of risky tokens required to provide to risky reserve
/// @param delStable Amount of stable tokens required to provide to stable reserve
/// @param data Calldata passed on allocate function call
function allocateCallback(
uint256 delRisky,
uint256 delStable,
bytes calldata data
) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title Primitive Swap Callback
/// @author Primitive
interface IPrimitiveSwapCallback {
/// @notice Triggered when swapping tokens in an Engine
/// @param delRisky Amount of risky tokens required to pay the swap with
/// @param delStable Amount of stable tokens required to pay the swap with
/// @param data Calldata passed on swap function call
function swapCallback(
uint256 delRisky,
uint256 delStable,
bytes calldata data
) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
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);
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.4;
import "./engine/IPrimitiveEngineActions.sol";
import "./engine/IPrimitiveEngineEvents.sol";
import "./engine/IPrimitiveEngineView.sol";
import "./engine/IPrimitiveEngineErrors.sol";
/// @title Primitive Engine Interface
interface IPrimitiveEngine is
IPrimitiveEngineActions,
IPrimitiveEngineEvents,
IPrimitiveEngineView,
IPrimitiveEngineErrors
{
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.4;
/// @title Primitive Factory Interface
/// @author Primitive
interface IPrimitiveFactory {
/// @notice Created a new engine contract!
/// @param from Calling `msg.sender` of deploy
/// @param risky Risky token of Engine to deploy
/// @param stable Stable token of Engine to deploy
/// @param engine Deployed engine address
event DeployEngine(address indexed from, address indexed risky, address indexed stable, address engine);
/// @notice Deploys a new Engine contract and sets the `getEngine` mapping for the tokens
/// @param risky Risky token, the underlying token
/// @param stable Stable token, the quote token
function deploy(address risky, address stable) external returns (address engine);
// ===== View =====
/// @notice Used to scale the minimum amount of liquidity to lowest precision
/// @dev E.g. if the lowest decimal token is 6, min liquidity w/ 18 decimals
/// cannot be 1000 wei, therefore the token decimals
/// divided by the min liquidity factor is the amount of minimum liquidity
/// MIN_LIQUIDITY = 10 ^ (Decimals / MIN_LIQUIDITY_FACTOR)
function MIN_LIQUIDITY_FACTOR() external pure returns (uint256);
/// @notice Called within Engine constructor so Engine can set immutable
/// variables without constructor args
/// @return factory Smart contract deploying the Engine contract
/// @return risky Risky token
/// @return stable Stable token
/// @return scaleFactorRisky Scale factor of the risky token, 10^(18 - riskyTokenDecimals)
/// @return scaleFactorStable Scale factor of the stable token, 10^(18 - stableTokenDecimals)
/// @return minLiquidity Minimum amount of liquidity on pool creation
function args()
external
view
returns (
address factory,
address risky,
address stable,
uint256 scaleFactorRisky,
uint256 scaleFactorStable,
uint256 minLiquidity
);
/// @notice Fetches engine address of a token pair which has been deployed from this factory
/// @param risky Risky token, the underlying token
/// @param stable Stable token, the quote token
/// @return engine Engine address for a risky and stable token
function getEngine(address risky, address stable) external view returns (address engine);
/// @notice Deployer does not have any access controls to wield
/// @return Deployer of this factory contract
function deployer() external view returns (address);
}
// SPDX-License-Identifier: BSD-4-Clause
/*
* ABDK Math 64.64 Smart Contract Library. Copyright © 2019 by ABDK Consulting.
* Author: Mikhail Vladimirov <[email protected]>
*/
pragma solidity ^0.8.0;
/**
* Smart contract library of mathematical functions operating with signed
* 64.64-bit fixed point numbers. Signed 64.64-bit fixed point number is
* basically a simple fraction whose numerator is signed 128-bit integer and
* denominator is 2^64. As long as denominator is always the same, there is no
* need to store it, thus in Solidity signed 64.64-bit fixed point numbers are
* represented by int128 type holding only the numerator.
*/
library ABDKMath64x64 {
/*
* Minimum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MIN_64x64 = -0x80000000000000000000000000000000;
/*
* Maximum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Convert signed 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x signed 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromInt(int256 x) internal pure returns (int128) {
unchecked {
require(x >= -0x8000000000000000 && x <= 0x7FFFFFFFFFFFFFFF);
return int128(x << 64);
}
}
/**
* Convert signed 64.64 fixed point number into signed 64-bit integer number
* rounding down.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64-bit integer number
*/
function toInt(int128 x) internal pure returns (int64) {
unchecked {
return int64(x >> 64);
}
}
/**
* Convert unsigned 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromUInt(uint256 x) internal pure returns (int128) {
unchecked {
require(x <= 0x7FFFFFFFFFFFFFFF);
return int128(int256(x << 64));
}
}
/**
* Convert signed 64.64 fixed point number into unsigned 64-bit integer
* number rounding down. Revert on underflow.
*
* @param x signed 64.64-bit fixed point number
* @return unsigned 64-bit integer number
*/
function toUInt(int128 x) internal pure returns (uint64) {
unchecked {
require(x >= 0);
return uint64(uint128(x >> 64));
}
}
/**
* Convert signed 128.128 fixed point number into signed 64.64-bit fixed point
* number rounding down. Revert on overflow.
*
* @param x signed 128.128-bin fixed point number
* @return signed 64.64-bit fixed point number
*/
function from128x128(int256 x) internal pure returns (int128) {
unchecked {
int256 result = x >> 64;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
}
/**
* Convert signed 64.64 fixed point number into signed 128.128 fixed point
* number.
*
* @param x signed 64.64-bit fixed point number
* @return signed 128.128 fixed point number
*/
function to128x128(int128 x) internal pure returns (int256) {
unchecked {
return int256(x) << 64;
}
}
/**
* Calculate x + y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function add(int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 result = int256(x) + y;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
}
/**
* Calculate x - y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function sub(int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 result = int256(x) - y;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
}
/**
* Calculate x * y rounding down. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function mul(int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 result = (int256(x) * y) >> 64;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
}
/**
* Calculate x * y rounding towards zero, where x is signed 64.64 fixed point
* number and y is signed 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y signed 256-bit integer number
* @return signed 256-bit integer number
*/
function muli(int128 x, int256 y) internal pure returns (int256) {
unchecked {
if (x == MIN_64x64) {
require(
y >= -0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF &&
y <= 0x1000000000000000000000000000000000000000000000000
);
return -y << 63;
} else {
bool negativeResult = false;
if (x < 0) {
x = -x;
negativeResult = true;
}
if (y < 0) {
y = -y; // We rely on overflow behavior here
negativeResult = !negativeResult;
}
uint256 absoluteResult = mulu(x, uint256(y));
if (negativeResult) {
require(absoluteResult <= 0x8000000000000000000000000000000000000000000000000000000000000000);
return -int256(absoluteResult); // We rely on overflow behavior here
} else {
require(absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int256(absoluteResult);
}
}
}
}
/**
* Calculate x * y rounding down, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y unsigned 256-bit integer number
* @return unsigned 256-bit integer number
*/
function mulu(int128 x, uint256 y) internal pure returns (uint256) {
unchecked {
if (y == 0) return 0;
require(x >= 0);
uint256 lo = (uint256(int256(x)) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64;
uint256 hi = uint256(int256(x)) * (y >> 128);
require(hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
hi <<= 64;
require(hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF - lo);
return hi + lo;
}
}
/**
* Calculate x / y rounding towards zero. Revert on overflow or when y is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function div(int128 x, int128 y) internal pure returns (int128) {
unchecked {
require(y != 0);
int256 result = (int256(x) << 64) / y;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
}
/**
* Calculate x / y rounding towards zero, where x and y are signed 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x signed 256-bit integer number
* @param y signed 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function divi(int256 x, int256 y) internal pure returns (int128) {
unchecked {
require(y != 0);
bool negativeResult = false;
if (x < 0) {
x = -x; // We rely on overflow behavior here
negativeResult = true;
}
if (y < 0) {
y = -y; // We rely on overflow behavior here
negativeResult = !negativeResult;
}
uint128 absoluteResult = divuu(uint256(x), uint256(y));
if (negativeResult) {
require(absoluteResult <= 0x80000000000000000000000000000000);
return -int128(absoluteResult); // We rely on overflow behavior here
} else {
require(absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int128(absoluteResult); // We rely on overflow behavior here
}
}
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function divu(uint256 x, uint256 y) internal pure returns (int128) {
unchecked {
require(y != 0);
uint128 result = divuu(x, y);
require(result <= uint128(MAX_64x64));
return int128(result);
}
}
/**
* Calculate -x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function neg(int128 x) internal pure returns (int128) {
unchecked {
require(x != MIN_64x64);
return -x;
}
}
/**
* Calculate |x|. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function abs(int128 x) internal pure returns (int128) {
unchecked {
require(x != MIN_64x64);
return x < 0 ? -x : x;
}
}
/**
* Calculate 1 / x rounding towards zero. Revert on overflow or when x is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function inv(int128 x) internal pure returns (int128) {
unchecked {
require(x != 0);
int256 result = int256(0x100000000000000000000000000000000) / x;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
}
/**
* Calculate arithmetics average of x and y, i.e. (x + y) / 2 rounding down.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function avg(int128 x, int128 y) internal pure returns (int128) {
unchecked {
return int128((int256(x) + int256(y)) >> 1);
}
}
/**
* Calculate geometric average of x and y, i.e. sqrt (x * y) rounding down.
* Revert on overflow or in case x * y is negative.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function gavg(int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 m = int256(x) * int256(y);
require(m >= 0);
require(m < 0x4000000000000000000000000000000000000000000000000000000000000000);
return int128(sqrtu(uint256(m)));
}
}
/**
* Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y uint256 value
* @return signed 64.64-bit fixed point number
*/
function pow(int128 x, uint256 y) internal pure returns (int128) {
unchecked {
bool negative = x < 0 && y & 1 == 1;
uint256 absX = uint128(x < 0 ? -x : x);
uint256 absResult;
absResult = 0x100000000000000000000000000000000;
if (absX <= 0x10000000000000000) {
absX <<= 63;
while (y != 0) {
if (y & 0x1 != 0) {
absResult = (absResult * absX) >> 127;
}
absX = (absX * absX) >> 127;
if (y & 0x2 != 0) {
absResult = (absResult * absX) >> 127;
}
absX = (absX * absX) >> 127;
if (y & 0x4 != 0) {
absResult = (absResult * absX) >> 127;
}
absX = (absX * absX) >> 127;
if (y & 0x8 != 0) {
absResult = (absResult * absX) >> 127;
}
absX = (absX * absX) >> 127;
y >>= 4;
}
absResult >>= 64;
} else {
uint256 absXShift = 63;
if (absX < 0x1000000000000000000000000) {
absX <<= 32;
absXShift -= 32;
}
if (absX < 0x10000000000000000000000000000) {
absX <<= 16;
absXShift -= 16;
}
if (absX < 0x1000000000000000000000000000000) {
absX <<= 8;
absXShift -= 8;
}
if (absX < 0x10000000000000000000000000000000) {
absX <<= 4;
absXShift -= 4;
}
if (absX < 0x40000000000000000000000000000000) {
absX <<= 2;
absXShift -= 2;
}
if (absX < 0x80000000000000000000000000000000) {
absX <<= 1;
absXShift -= 1;
}
uint256 resultShift = 0;
while (y != 0) {
require(absXShift < 64);
if (y & 0x1 != 0) {
absResult = (absResult * absX) >> 127;
resultShift += absXShift;
if (absResult > 0x100000000000000000000000000000000) {
absResult >>= 1;
resultShift += 1;
}
}
absX = (absX * absX) >> 127;
absXShift <<= 1;
if (absX >= 0x100000000000000000000000000000000) {
absX >>= 1;
absXShift += 1;
}
y >>= 1;
}
require(resultShift < 64);
absResult >>= 64 - resultShift;
}
int256 result = negative ? -int256(absResult) : int256(absResult);
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
}
/**
* Calculate sqrt (x) rounding down. Revert if x < 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function sqrt(int128 x) internal pure returns (int128) {
unchecked {
require(x >= 0);
return int128(sqrtu(uint256(int256(x)) << 64));
}
}
/**
* Calculate binary logarithm of x. Revert if x <= 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function log_2(int128 x) internal pure returns (int128) {
unchecked {
require(x > 0);
int256 msb = 0;
int256 xc = x;
if (xc >= 0x10000000000000000) {
xc >>= 64;
msb += 64;
}
if (xc >= 0x100000000) {
xc >>= 32;
msb += 32;
}
if (xc >= 0x10000) {
xc >>= 16;
msb += 16;
}
if (xc >= 0x100) {
xc >>= 8;
msb += 8;
}
if (xc >= 0x10) {
xc >>= 4;
msb += 4;
}
if (xc >= 0x4) {
xc >>= 2;
msb += 2;
}
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
int256 result = (msb - 64) << 64;
uint256 ux = uint256(int256(x)) << uint256(127 - msb);
for (int256 bit = 0x8000000000000000; bit > 0; bit >>= 1) {
ux *= ux;
uint256 b = ux >> 255;
ux >>= 127 + b;
result += bit * int256(b);
}
return int128(result);
}
}
/**
* Calculate natural logarithm of x. Revert if x <= 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function ln(int128 x) internal pure returns (int128) {
unchecked {
require(x > 0);
return int128(int256((uint256(int256(log_2(x))) * 0xB17217F7D1CF79ABC9E3B39803F2F6AF) >> 128));
}
}
/**
* Calculate binary exponent of x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function exp_2(int128 x) internal pure returns (int128) {
unchecked {
require(x < 0x400000000000000000); // Overflow
if (x < -0x400000000000000000) return 0; // Underflow
uint256 result = 0x80000000000000000000000000000000;
if (x & 0x8000000000000000 > 0) result = (result * 0x16A09E667F3BCC908B2FB1366EA957D3E) >> 128;
if (x & 0x4000000000000000 > 0) result = (result * 0x1306FE0A31B7152DE8D5A46305C85EDEC) >> 128;
if (x & 0x2000000000000000 > 0) result = (result * 0x1172B83C7D517ADCDF7C8C50EB14A791F) >> 128;
if (x & 0x1000000000000000 > 0) result = (result * 0x10B5586CF9890F6298B92B71842A98363) >> 128;
if (x & 0x800000000000000 > 0) result = (result * 0x1059B0D31585743AE7C548EB68CA417FD) >> 128;
if (x & 0x400000000000000 > 0) result = (result * 0x102C9A3E778060EE6F7CACA4F7A29BDE8) >> 128;
if (x & 0x200000000000000 > 0) result = (result * 0x10163DA9FB33356D84A66AE336DCDFA3F) >> 128;
if (x & 0x100000000000000 > 0) result = (result * 0x100B1AFA5ABCBED6129AB13EC11DC9543) >> 128;
if (x & 0x80000000000000 > 0) result = (result * 0x10058C86DA1C09EA1FF19D294CF2F679B) >> 128;
if (x & 0x40000000000000 > 0) result = (result * 0x1002C605E2E8CEC506D21BFC89A23A00F) >> 128;
if (x & 0x20000000000000 > 0) result = (result * 0x100162F3904051FA128BCA9C55C31E5DF) >> 128;
if (x & 0x10000000000000 > 0) result = (result * 0x1000B175EFFDC76BA38E31671CA939725) >> 128;
if (x & 0x8000000000000 > 0) result = (result * 0x100058BA01FB9F96D6CACD4B180917C3D) >> 128;
if (x & 0x4000000000000 > 0) result = (result * 0x10002C5CC37DA9491D0985C348C68E7B3) >> 128;
if (x & 0x2000000000000 > 0) result = (result * 0x1000162E525EE054754457D5995292026) >> 128;
if (x & 0x1000000000000 > 0) result = (result * 0x10000B17255775C040618BF4A4ADE83FC) >> 128;
if (x & 0x800000000000 > 0) result = (result * 0x1000058B91B5BC9AE2EED81E9B7D4CFAB) >> 128;
if (x & 0x400000000000 > 0) result = (result * 0x100002C5C89D5EC6CA4D7C8ACC017B7C9) >> 128;
if (x & 0x200000000000 > 0) result = (result * 0x10000162E43F4F831060E02D839A9D16D) >> 128;
if (x & 0x100000000000 > 0) result = (result * 0x100000B1721BCFC99D9F890EA06911763) >> 128;
if (x & 0x80000000000 > 0) result = (result * 0x10000058B90CF1E6D97F9CA14DBCC1628) >> 128;
if (x & 0x40000000000 > 0) result = (result * 0x1000002C5C863B73F016468F6BAC5CA2B) >> 128;
if (x & 0x20000000000 > 0) result = (result * 0x100000162E430E5A18F6119E3C02282A5) >> 128;
if (x & 0x10000000000 > 0) result = (result * 0x1000000B1721835514B86E6D96EFD1BFE) >> 128;
if (x & 0x8000000000 > 0) result = (result * 0x100000058B90C0B48C6BE5DF846C5B2EF) >> 128;
if (x & 0x4000000000 > 0) result = (result * 0x10000002C5C8601CC6B9E94213C72737A) >> 128;
if (x & 0x2000000000 > 0) result = (result * 0x1000000162E42FFF037DF38AA2B219F06) >> 128;
if (x & 0x1000000000 > 0) result = (result * 0x10000000B17217FBA9C739AA5819F44F9) >> 128;
if (x & 0x800000000 > 0) result = (result * 0x1000000058B90BFCDEE5ACD3C1CEDC823) >> 128;
if (x & 0x400000000 > 0) result = (result * 0x100000002C5C85FE31F35A6A30DA1BE50) >> 128;
if (x & 0x200000000 > 0) result = (result * 0x10000000162E42FF0999CE3541B9FFFCF) >> 128;
if (x & 0x100000000 > 0) result = (result * 0x100000000B17217F80F4EF5AADDA45554) >> 128;
if (x & 0x80000000 > 0) result = (result * 0x10000000058B90BFBF8479BD5A81B51AD) >> 128;
if (x & 0x40000000 > 0) result = (result * 0x1000000002C5C85FDF84BD62AE30A74CC) >> 128;
if (x & 0x20000000 > 0) result = (result * 0x100000000162E42FEFB2FED257559BDAA) >> 128;
if (x & 0x10000000 > 0) result = (result * 0x1000000000B17217F7D5A7716BBA4A9AE) >> 128;
if (x & 0x8000000 > 0) result = (result * 0x100000000058B90BFBE9DDBAC5E109CCE) >> 128;
if (x & 0x4000000 > 0) result = (result * 0x10000000002C5C85FDF4B15DE6F17EB0D) >> 128;
if (x & 0x2000000 > 0) result = (result * 0x1000000000162E42FEFA494F1478FDE05) >> 128;
if (x & 0x1000000 > 0) result = (result * 0x10000000000B17217F7D20CF927C8E94C) >> 128;
if (x & 0x800000 > 0) result = (result * 0x1000000000058B90BFBE8F71CB4E4B33D) >> 128;
if (x & 0x400000 > 0) result = (result * 0x100000000002C5C85FDF477B662B26945) >> 128;
if (x & 0x200000 > 0) result = (result * 0x10000000000162E42FEFA3AE53369388C) >> 128;
if (x & 0x100000 > 0) result = (result * 0x100000000000B17217F7D1D351A389D40) >> 128;
if (x & 0x80000 > 0) result = (result * 0x10000000000058B90BFBE8E8B2D3D4EDE) >> 128;
if (x & 0x40000 > 0) result = (result * 0x1000000000002C5C85FDF4741BEA6E77E) >> 128;
if (x & 0x20000 > 0) result = (result * 0x100000000000162E42FEFA39FE95583C2) >> 128;
if (x & 0x10000 > 0) result = (result * 0x1000000000000B17217F7D1CFB72B45E1) >> 128;
if (x & 0x8000 > 0) result = (result * 0x100000000000058B90BFBE8E7CC35C3F0) >> 128;
if (x & 0x4000 > 0) result = (result * 0x10000000000002C5C85FDF473E242EA38) >> 128;
if (x & 0x2000 > 0) result = (result * 0x1000000000000162E42FEFA39F02B772C) >> 128;
if (x & 0x1000 > 0) result = (result * 0x10000000000000B17217F7D1CF7D83C1A) >> 128;
if (x & 0x800 > 0) result = (result * 0x1000000000000058B90BFBE8E7BDCBE2E) >> 128;
if (x & 0x400 > 0) result = (result * 0x100000000000002C5C85FDF473DEA871F) >> 128;
if (x & 0x200 > 0) result = (result * 0x10000000000000162E42FEFA39EF44D91) >> 128;
if (x & 0x100 > 0) result = (result * 0x100000000000000B17217F7D1CF79E949) >> 128;
if (x & 0x80 > 0) result = (result * 0x10000000000000058B90BFBE8E7BCE544) >> 128;
if (x & 0x40 > 0) result = (result * 0x1000000000000002C5C85FDF473DE6ECA) >> 128;
if (x & 0x20 > 0) result = (result * 0x100000000000000162E42FEFA39EF366F) >> 128;
if (x & 0x10 > 0) result = (result * 0x1000000000000000B17217F7D1CF79AFA) >> 128;
if (x & 0x8 > 0) result = (result * 0x100000000000000058B90BFBE8E7BCD6D) >> 128;
if (x & 0x4 > 0) result = (result * 0x10000000000000002C5C85FDF473DE6B2) >> 128;
if (x & 0x2 > 0) result = (result * 0x1000000000000000162E42FEFA39EF358) >> 128;
if (x & 0x1 > 0) result = (result * 0x10000000000000000B17217F7D1CF79AB) >> 128;
result >>= uint256(int256(63 - (x >> 64)));
require(result <= uint256(int256(MAX_64x64)));
return int128(int256(result));
}
}
/**
* Calculate natural exponent of x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function exp(int128 x) internal pure returns (int128) {
unchecked {
require(x < 0x400000000000000000); // Overflow
if (x < -0x400000000000000000) return 0; // Underflow
return exp_2(int128((int256(x) * 0x171547652B82FE1777D0FFDA0D23A7D12) >> 128));
}
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return unsigned 64.64-bit fixed point number
*/
function divuu(uint256 x, uint256 y) private pure returns (uint128) {
unchecked {
require(y != 0);
uint256 result;
if (x <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF) result = (x << 64) / y;
else {
uint256 msb = 192;
uint256 xc = x >> 192;
if (xc >= 0x100000000) {
xc >>= 32;
msb += 32;
}
if (xc >= 0x10000) {
xc >>= 16;
msb += 16;
}
if (xc >= 0x100) {
xc >>= 8;
msb += 8;
}
if (xc >= 0x10) {
xc >>= 4;
msb += 4;
}
if (xc >= 0x4) {
xc >>= 2;
msb += 2;
}
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
result = (x << (255 - msb)) / (((y - 1) >> (msb - 191)) + 1);
require(result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 hi = result * (y >> 128);
uint256 lo = result * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 xh = x >> 192;
uint256 xl = x << 64;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
lo = hi << 128;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
assert(xh == hi >> 128);
result += xl / y;
}
require(result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return uint128(result);
}
}
/**
* Calculate sqrt (x) rounding down, where x is unsigned 256-bit integer
* number.
*
* @param x unsigned 256-bit integer number
* @return unsigned 128-bit integer number
*/
function sqrtu(uint256 x) private pure returns (uint128) {
unchecked {
if (x == 0) return 0;
else {
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) {
xx >>= 128;
r <<= 64;
}
if (xx >= 0x10000000000000000) {
xx >>= 64;
r <<= 32;
}
if (xx >= 0x100000000) {
xx >>= 32;
r <<= 16;
}
if (xx >= 0x10000) {
xx >>= 16;
r <<= 8;
}
if (xx >= 0x100) {
xx >>= 8;
r <<= 4;
}
if (xx >= 0x10) {
xx >>= 4;
r <<= 2;
}
if (xx >= 0x8) {
r <<= 1;
}
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return uint128(r < r1 ? r : r1);
}
}
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.4;
import "./ABDKMath64x64.sol";
/// @title Cumulative Normal Distribution Math Library
/// @author Primitive
library CumulativeNormalDistribution {
using ABDKMath64x64 for int128;
using ABDKMath64x64 for uint256;
/// @notice Thrown on passing an arg that is out of the input range for these math functions
error InverseOutOfBounds(int128 value);
int128 public constant ONE_INT = 0x10000000000000000;
int128 public constant TWO_INT = 0x20000000000000000;
int128 public constant CDF0 = 0x53dd02a4f5ee2e46;
int128 public constant CDF1 = 0x413c831bb169f874;
int128 public constant CDF2 = -0x48d4c730f051a5fe;
int128 public constant CDF3 = 0x16a09e667f3bcc908;
int128 public constant CDF4 = -0x17401c57014c38f14;
int128 public constant CDF5 = 0x10fb844255a12d72e;
/// @notice Uses Abramowitz and Stegun approximation:
/// https://en.wikipedia.org/wiki/Abramowitz_and_Stegun
/// @dev Maximum error: 3.15x10-3
/// @return Standard Normal Cumulative Distribution Function of `x`
function getCDF(int128 x) internal pure returns (int128) {
int128 z = x.div(CDF3);
int128 t = ONE_INT.div(ONE_INT.add(CDF0.mul(z.abs())));
int128 erf = getErrorFunction(z, t);
if (z < 0) {
erf = erf.neg();
}
int128 result = (HALF_INT).mul(ONE_INT.add(erf));
return result;
}
/// @notice Uses Abramowitz and Stegun approximation:
/// https://en.wikipedia.org/wiki/Error_function
/// @dev Maximum error: 1.5×10−7
/// @return Error Function for approximating the Standard Normal CDF
function getErrorFunction(int128 z, int128 t) internal pure returns (int128) {
int128 step1 = t.mul(CDF3.add(t.mul(CDF4.add(t.mul(CDF5)))));
int128 step2 = CDF1.add(t.mul(CDF2.add(step1)));
int128 result = ONE_INT.sub(t.mul(step2.mul((z.mul(z).neg()).exp())));
return result;
}
int128 public constant HALF_INT = 0x8000000000000000;
int128 public constant INVERSE0 = 0x26A8F3C1F21B336E;
int128 public constant INVERSE1 = -0x87C57E5DA70D3C90;
int128 public constant INVERSE2 = 0x15D71F5721242C787;
int128 public constant INVERSE3 = 0x21D0A04B0E9B94F1;
int128 public constant INVERSE4 = -0xC2BF5D74C724E53F;
int128 public constant LOW_TAIL = 0x666666666666666; // 0.025
int128 public constant HIGH_TAIL = 0xF999999999999999; // 0.975
/// @notice Returns the inverse CDF, or quantile function of `p`.
/// @dev Source: https://arxiv.org/pdf/1002.0567.pdf
/// Maximum error of central region is 1.16x10−4
/// @return fcentral(p) = q * (a2 + (a1r + a0) / (r^2 + b1r +b0))
function getInverseCDF(int128 p) internal pure returns (int128) {
if (p >= ONE_INT || p <= 0) revert InverseOutOfBounds(p);
// Short circuit for the central region, central region inclusive of tails
if (p <= HIGH_TAIL && p >= LOW_TAIL) {
return central(p);
} else if (p < LOW_TAIL) {
return tail(p);
} else {
int128 negativeTail = -tail(ONE_INT.sub(p));
return negativeTail;
}
}
/// @dev Maximum error: 1.16x10−4
/// @return Inverse CDF around the central area of 0.025 <= p <= 0.975
function central(int128 p) internal pure returns (int128) {
int128 q = p.sub(HALF_INT);
int128 r = q.mul(q);
int128 result = q.mul(
INVERSE2.add((INVERSE1.mul(r).add(INVERSE0)).div((r.mul(r).add(INVERSE4.mul(r)).add(INVERSE3))))
);
return result;
}
int128 public constant C0 = 0x10E56D75CE8BCE9FAE;
int128 public constant C1 = -0x2CB2447D36D513DAE;
int128 public constant C2 = -0x8BB4226952BD69EDF;
int128 public constant C3 = -0x1000BF627FA188411;
int128 public constant C0_D = 0x10AEAC93F55267A9A5;
int128 public constant C1_D = 0x41ED34A2561490236;
int128 public constant C2_D = 0x7A1E70F720ECA43;
int128 public constant D0 = 0x72C7D592D021FB1DB;
int128 public constant D1 = 0x8C27B4617F5F800EA;
/// @dev Maximum error: 2.458x10-5
/// @return Inverse CDF of the tail, defined for p < 0.0465, used with p < 0.025
function tail(int128 p) internal pure returns (int128) {
int128 r = ONE_INT.div(p.mul(p)).ln().sqrt();
int128 step0 = C3.mul(r).add(C2_D);
int128 numerator = C1_D.mul(r).add(C0_D);
int128 denominator = r.mul(r).add(D1.mul(r)).add(D0);
int128 result = step0.add(numerator.div(denominator));
return result;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title Action functions for the Primitive Engine contract
/// @author Primitive
interface IPrimitiveEngineActions {
// ===== Pool Updates =====
/// @notice Updates the time until expiry of the pool by setting its last timestamp value
/// @param poolId Keccak256 hash of engine address, strike, sigma, maturity, and gamma
/// @return lastTimestamp Timestamp loaded into the state of the pool's Calibration.lastTimestamp
function updateLastTimestamp(bytes32 poolId) external returns (uint32 lastTimestamp);
/// @notice Initializes a curve with parameters in the `calibrations` storage mapping in the Engine
/// @param strike Marginal price of the pool's risky token at maturity, with the same decimals as the stable token, valid [0, 2^128-1]
/// @param sigma AKA Implied Volatility in basis points, determines the price impact of swaps, valid for (1, 10_000_000)
/// @param maturity Timestamp which starts the BUFFER countdown until swaps will cease, in seconds, valid for (block.timestamp, 2^32-1]
/// @param gamma Multiplied against swap in amounts to apply fee, equal to 1 - fee % but units are in basis points, valid for (9_000, 10_000)
/// @param riskyPerLp Risky reserve per liq. with risky decimals, = 1 - N(d1), d1 = (ln(S/K)+(r*σ^2/2))/σ√τ, valid for [0, 1e^(risky token decimals))
/// @param delLiquidity Amount of liquidity units to allocate to the curve, wei value with 18 decimals of precision
/// @param data Arbitrary data that is passed to the createCallback function
/// @return poolId Keccak256 hash of engine address, strike, sigma, maturity, and gamma
/// @return delRisky Total amount of risky tokens provided to reserves
/// @return delStable Total amount of stable tokens provided to reserves
function create(
uint128 strike,
uint32 sigma,
uint32 maturity,
uint32 gamma,
uint256 riskyPerLp,
uint256 delLiquidity,
bytes calldata data
)
external
returns (
bytes32 poolId,
uint256 delRisky,
uint256 delStable
);
// ===== Margin ====
/// @notice Adds risky and/or stable tokens to a `recipient`'s internal balance account
/// @param recipient Recipient margin account of the deposited tokens
/// @param delRisky Amount of risky tokens to deposit
/// @param delStable Amount of stable tokens to deposit
/// @param data Arbitrary data that is passed to the depositCallback function
function deposit(
address recipient,
uint256 delRisky,
uint256 delStable,
bytes calldata data
) external;
/// @notice Removes risky and/or stable tokens from a `msg.sender`'s internal balance account
/// @param recipient Address that tokens are transferred to
/// @param delRisky Amount of risky tokens to withdraw
/// @param delStable Amount of stable tokens to withdraw
function withdraw(
address recipient,
uint256 delRisky,
uint256 delStable
) external;
// ===== Liquidity =====
/// @notice Allocates risky and stable tokens to a specific curve with `poolId`
/// @param poolId Keccak256 hash of engine address, strike, sigma, maturity, and gamma
/// @param recipient Address to give the allocated liquidity to
/// @param delRisky Amount of risky tokens to add
/// @param delStable Amount of stable tokens to add
/// @param fromMargin Whether the `msg.sender` pays with their margin balance, or must send tokens
/// @param data Arbitrary data that is passed to the allocateCallback function
/// @return delLiquidity Amount of liquidity given to `recipient`
function allocate(
bytes32 poolId,
address recipient,
uint256 delRisky,
uint256 delStable,
bool fromMargin,
bytes calldata data
) external returns (uint256 delLiquidity);
/// @notice Unallocates risky and stable tokens from a specific curve with `poolId`
/// @param poolId Keccak256 hash of engine address, strike, sigma, maturity, and gamma
/// @param delLiquidity Amount of liquidity to remove
/// @return delRisky Amount of risky tokens received from removed liquidity
/// @return delStable Amount of stable tokens received from removed liquidity
function remove(bytes32 poolId, uint256 delLiquidity) external returns (uint256 delRisky, uint256 delStable);
// ===== Swaps =====
/// @notice Swaps between `risky` and `stable` tokens
/// @param recipient Address that receives output token `deltaOut` amount
/// @param poolId Keccak256 hash of engine address, strike, sigma, maturity, and gamma
/// @param riskyForStable If true, swap risky to stable, else swap stable to risky
/// @param deltaIn Amount of tokens to swap in
/// @param deltaOut Amount of tokens to swap out
/// @param fromMargin Whether the `msg.sender` uses their margin balance, or must send tokens
/// @param toMargin Whether the `deltaOut` amount is transferred or deposited into margin
/// @param data Arbitrary data that is passed to the swapCallback function
function swap(
address recipient,
bytes32 poolId,
bool riskyForStable,
uint256 deltaIn,
uint256 deltaOut,
bool fromMargin,
bool toMargin,
bytes calldata data
) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title Events of the Primitive Engine contract
/// @author Primitive
interface IPrimitiveEngineEvents {
/// @notice Creates a pool with liquidity
/// @dev Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @param from Calling `msg.sender` of the create function
/// @param strike Marginal price of the pool's risky token at maturity, with the same decimals as the stable token, valid [0, 2^128-1]
/// @param sigma AKA Implied Volatility in basis points, determines the price impact of swaps, valid for (1, 10_000_000)
/// @param maturity Timestamp which starts the BUFFER countdown until swaps will cease, in seconds, valid for (block.timestamp, 2^32-1]
/// @param gamma Multiplied against swap in amounts to apply fee, equal to 1 - fee % but units are in basis points, valid for (9000, 10_000)
/// @param delRisky Amount of risky tokens deposited
/// @param delStable Amount of stable tokens deposited
/// @param delLiquidity Amount of liquidity granted to `recipient`
event Create(
address indexed from,
uint128 strike,
uint32 sigma,
uint32 indexed maturity,
uint32 indexed gamma,
uint256 delRisky,
uint256 delStable,
uint256 delLiquidity
);
/// @notice Updates the time until expiry of the pool with `poolId`
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
event UpdateLastTimestamp(bytes32 indexed poolId);
// ===== Margin ====
/// @notice Added stable and/or risky tokens to a margin account
/// @param from Method caller `msg.sender`
/// @param recipient Margin account recieving deposits
/// @param delRisky Amount of risky tokens deposited
/// @param delStable Amount of stable tokens deposited
event Deposit(address indexed from, address indexed recipient, uint256 delRisky, uint256 delStable);
/// @notice Removes stable and/or risky from a margin account
/// @param from Method caller `msg.sender`
/// @param recipient Address that tokens are sent to
/// @param delRisky Amount of risky tokens withdrawn
/// @param delStable Amount of stable tokens withdrawn
event Withdraw(address indexed from, address indexed recipient, uint256 delRisky, uint256 delStable);
// ===== Liquidity =====
/// @notice Adds liquidity of risky and stable tokens to a specified `poolId`
/// @param from Method caller `msg.sender`
/// @param recipient Address that receives liquidity
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @param delRisky Amount of risky tokens deposited
/// @param delStable Amount of stable tokens deposited
/// @param delLiquidity Amount of liquidity granted to `recipient`
event Allocate(
address indexed from,
address indexed recipient,
bytes32 indexed poolId,
uint256 delRisky,
uint256 delStable,
uint256 delLiquidity
);
/// @notice Adds liquidity of risky and stable tokens to a specified `poolId`
/// @param from Method caller `msg.sender`
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @param delRisky Amount of risky tokens deposited
/// @param delStable Amount of stable tokens deposited
/// @param delLiquidity Amount of liquidity decreased from `from`
event Remove(
address indexed from,
bytes32 indexed poolId,
uint256 delRisky,
uint256 delStable,
uint256 delLiquidity
);
// ===== Swaps =====
/// @notice Swaps between `risky` and `stable` assets
/// @param from Method caller `msg.sender`
/// @param recipient Address that receives `deltaOut` amount of tokens
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @param riskyForStable If true, swaps risky to stable, else swaps stable to risky
/// @param deltaIn Amount of tokens added to reserves
/// @param deltaOut Amount of tokens removed from reserves
event Swap(
address indexed from,
address indexed recipient,
bytes32 indexed poolId,
bool riskyForStable,
uint256 deltaIn,
uint256 deltaOut
);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
/// @title View functions of the Primitive Engine contract
/// @author Primitive
interface IPrimitiveEngineView {
// ===== View =====
/// @notice Fetches the current invariant, notation is usually `k`, based on risky and stable token reserves of pool with `poolId`
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @return invariant Signed fixed point 64.64 number, invariant of `poolId`
function invariantOf(bytes32 poolId) external view returns (int128 invariant);
// ===== Constants =====
/// @return Precision units to scale to when doing token related calculations
function PRECISION() external view returns (uint256);
/// @return Amount of seconds after pool expiry which allows swaps, no swaps after buffer
function BUFFER() external view returns (uint256);
// ===== Immutables =====
/// @return Amount of liquidity burned on `create()` calls
function MIN_LIQUIDITY() external view returns (uint256);
//// @return Factory address which deployed this engine contract
function factory() external view returns (address);
//// @return Risky token address, a more accurate name is the underlying token
function risky() external view returns (address);
/// @return Stable token address, a more accurate name is the quote token
function stable() external view returns (address);
/// @return Multiplier to scale amounts to/from, equal to 10^(18 - riskyDecimals)
function scaleFactorRisky() external view returns (uint256);
/// @return Multiplier to scale amounts to/from, equal to 10^(18 - stableDecimals)
function scaleFactorStable() external view returns (uint256);
// ===== Pool State =====
/// @notice Fetches the global reserve state for a pool with `poolId`
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @return reserveRisky Risky token balance in the reserve
/// @return reserveStable Stable token balance in the reserve
/// @return liquidity Total supply of liquidity for the curve
/// @return blockTimestamp Timestamp when the cumulative reserve values were last updated
/// @return cumulativeRisky Cumulative sum of risky token reserves of the previous update
/// @return cumulativeStable Cumulative sum of stable token reserves of the previous update
/// @return cumulativeLiquidity Cumulative sum of total supply of liquidity of the previous update
function reserves(bytes32 poolId)
external
view
returns (
uint128 reserveRisky,
uint128 reserveStable,
uint128 liquidity,
uint32 blockTimestamp,
uint256 cumulativeRisky,
uint256 cumulativeStable,
uint256 cumulativeLiquidity
);
/// @notice Fetches `Calibration` pool parameters
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @return strike Marginal price of the pool's risky token at maturity, with the same decimals as the stable token, valid [0, 2^128-1]
/// @return sigma AKA Implied Volatility in basis points, determines the price impact of swaps, valid for (1, 10_000_000)
/// @return maturity Timestamp which starts the BUFFER countdown until swaps will cease, in seconds, valid for (block.timestamp, 2^32-1]
/// @return lastTimestamp Last timestamp used to calculate time until expiry, aka "tau"
/// @return gamma Multiplied against swap in amounts to apply fee, equal to 1 - fee % but units are in basis points, valid for (9_000, 10_000)
function calibrations(bytes32 poolId)
external
view
returns (
uint128 strike,
uint32 sigma,
uint32 maturity,
uint32 lastTimestamp,
uint32 gamma
);
/// @notice Fetches position liquidity an account address and poolId
/// @param poolId Keccak256 hash of the engine address, strike, sigma, maturity, and gamma
/// @return liquidity Liquidity owned by `account` in `poolId`
function liquidity(address account, bytes32 poolId) external view returns (uint256 liquidity);
/// @notice Fetches the margin balances of `account`
/// @param account Margin account to fetch
/// @return balanceRisky Balance of the risky token
/// @return balanceStable Balance of the stable token
function margins(address account) external view returns (uint128 balanceRisky, uint128 balanceStable);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.4;
/// @title Errors for the Primitive Engine contract
/// @author Primitive
/// @notice Custom errors are encoded with their selector and arguments
/// @dev Peripheral smart contracts should try catch and check if data matches another custom error
interface IPrimitiveEngineErrors {
/// @notice Thrown on attempted re-entrancy on a function with a re-entrancy guard
error LockedError();
/// @notice Thrown when the balanceOf function is not successful and does not return data
error BalanceError();
/// @notice Thrown in create when a pool with computed poolId already exists
error PoolDuplicateError();
/// @notice Thrown when calling an expired pool, where block.timestamp > maturity, + BUFFER if swap
error PoolExpiredError();
/// @notice Thrown when liquidity is lower than or equal to the minimum amount of liquidity
error MinLiquidityError(uint256 value);
/// @notice Thrown when riskyPerLp is outside the range of acceptable values, 0 < riskyPerLp <= 1eRiskyDecimals
error RiskyPerLpError(uint256 value);
/// @notice Thrown when sigma is outside the range of acceptable values, 1 <= sigma <= 1e7 with 4 precision
error SigmaError(uint256 value);
/// @notice Thrown when strike is not valid, i.e. equal to 0 or greater than 2^128
error StrikeError(uint256 value);
/// @notice Thrown when gamma, equal to 1 - fee %, is outside its bounds: 9_000 <= gamma <= 10_000; 1_000 = 10% fee
error GammaError(uint256 value);
/// @notice Thrown when the parameters of a new pool are invalid, causing initial reserves to be 0
error CalibrationError(uint256 delRisky, uint256 delStable);
/// @notice Thrown when the expected risky balance is less than the actual balance
/// @param expected Expected risky balance
/// @param actual Actual risky balance
error RiskyBalanceError(uint256 expected, uint256 actual);
/// @notice Thrown when the expected stable balance is less than the actual balance
/// @param expected Expected stable balance
/// @param actual Actual stable balance
error StableBalanceError(uint256 expected, uint256 actual);
/// @notice Thrown when the pool with poolId has not been created
error UninitializedError();
/// @notice Thrown when the risky or stable amount is 0
error ZeroDeltasError();
/// @notice Thrown when the liquidity parameter is 0
error ZeroLiquidityError();
/// @notice Thrown when the deltaIn parameter is 0
error DeltaInError();
/// @notice Thrown when the deltaOut parameter is 0
error DeltaOutError();
/// @notice Thrown when the invariant check fails
/// @dev Most important check as it verifies the validity of a desired swap
/// @param invariant Pre-swap invariant updated with new tau
/// @param nextInvariant Post-swap invariant after the swap amounts are applied to reserves
error InvariantError(int128 invariant, int128 nextInvariant);
}
|
@inheritdoc IPrimitiveEngineView
|
uint256 public immutable override scaleFactorRisky;
| 14,610,506
|
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pragma solidity ^0.4.20;
/*
ETC Version:
https://etherhub.io/addr/0xc2dc5e825faeb9bd274b61a2993f4f8949af4a21
*/
contract BlackPearlETH {
/*=================================
= MODIFIERS =
=================================*/
// only people with tokens
modifier onlyBagholders() {
require(myTokens() > 0);
_;
}
// only people with profits
modifier onlyStronghands() {
require(myDividends(true) > 0);
_;
}
// administrators can:
// -> change the name of the contract
// -> change the name of the token
// -> change the PoS difficulty (How many tokens it costs to hold a masternode, in case it gets crazy high later)
// they CANNOT:
// -> take funds
// -> disable withdrawals
// -> kill the contract
// -> change the price of tokens
modifier onlyAdministrator(){
address _customerAddress = msg.sender;
require(administrators[_customerAddress]);
_;
}
// ensures that the first tokens in the contract will be equally distributed
// meaning, no divine dump will be ever possible
// result: healthy longevity.
modifier antiEarlyWhale(uint256 _amountOfEthereum){
address _customerAddress = msg.sender;
// are we still in the vulnerable phase?
// if so, enact anti early whale protocol
if( onlyAmbassadors && ((totalEthereumBalance() - _amountOfEthereum) <= ambassadorQuota_ )){
require(
// is the customer in the ambassador list?
ambassadors_[_customerAddress] == true &&
// does the customer purchase exceed the max ambassador quota?
(ambassadorAccumulatedQuota_[_customerAddress] + _amountOfEthereum) <= ambassadorMaxPurchase_
);
// updated the accumulated quota
ambassadorAccumulatedQuota_[_customerAddress] = SafeMath.add(ambassadorAccumulatedQuota_[_customerAddress], _amountOfEthereum);
// execute
_;
} else {
// in case the ether count drops low, the ambassador phase won't reinitiate
onlyAmbassadors = false;
_;
}
}
/*==============================
= EVENTS =
==============================*/
event onTokenPurchase(
address indexed customerAddress,
uint256 incomingEthereum,
uint256 tokensMinted,
address indexed referredBy
);
event onTokenSell(
address indexed customerAddress,
uint256 tokensBurned,
uint256 ethereumEarned
);
event onReinvestment(
address indexed customerAddress,
uint256 ethereumReinvested,
uint256 tokensMinted
);
event onWithdraw(
address indexed customerAddress,
uint256 ethereumWithdrawn
);
// ERC20
event Transfer(
address indexed from,
address indexed to,
uint256 tokens
);
/*=====================================
= CONFIGURABLES =
=====================================*/
string public name = "Black Pearl ETH";
string public symbol = "MEDA";
uint8 constant public decimals = 18;
uint8 constant internal entryFee_ = 20; // 20% Entry fee
uint8 constant internal refferalFee_ = 15; // 15% Referral
uint8 constant internal exitFee_ = 10; // 10% exit fee
uint256 constant internal tokenPriceInitial_ = 0.0000001 ether;
uint256 constant internal tokenPriceIncremental_ = 0.00000001 ether;
uint256 constant internal magnitude = 2**64;
// 250 Medaillions required for activation masternode
uint256 public stakingRequirement = 250e18;
// ambassador program
mapping(address => bool) internal ambassadors_;
uint256 constant internal ambassadorMaxPurchase_ = 50 ether;
uint256 constant internal ambassadorQuota_ = 300 ether;
// referral program
mapping(address => uint256) internal referrals;
mapping(address => bool) internal isUser;
address[] public usersAddresses;
/*================================
= DATASETS =
================================*/
// amount of shares for each address (scaled number)
mapping(address => uint256) internal tokenBalanceLedger_;
mapping(address => uint256) internal referralBalance_;
mapping(address => int256) internal payoutsTo_;
mapping(address => uint256) internal ambassadorAccumulatedQuota_;
uint256 internal tokenSupply_ = 0;
uint256 internal profitPerShare_;
// administrator list (see above on what they can do)
mapping(address => bool) public administrators;
// when this is set to true, only ambassadors can purchase tokens (this prevents a whale premine, it ensures a fairly distributed upper pyramid)
bool public onlyAmbassadors = true;
/*=======================================
= PUBLIC FUNCTIONS =
=======================================*/
/*
* -- APPLICATION ENTRY POINTS --
*/
function BlackPearlETH()
public
{
// N.O.T
ambassadors_[0x9d71d8743f41987597e2ae3663cca36ca71024f4] = true;
// T.T.U
ambassadors_[0xC6D4a4A0bf0507749D4a23C9550A826207b5D94b] = true;
// C.A
ambassadors_[0x008ca4f1ba79d1a265617c6206d7884ee8108a78] = true;
// R.A
ambassadors_[0x41a21b264F9ebF6cF571D4543a5b3AB1c6bEd98C] = true;
// J.K
ambassadors_[0xc7F15d0238d207e19cce6bd6C0B85f343896F046] = true;
// C.G
ambassadors_[0xee54d208f62368b4effe176cb548a317dcae963f] = true;
// P.X
ambassadors_[0x074f21a36217d7615d0202faa926aefebb5a9999] = true;
// S.Z
ambassadors_[0x8c8F39b851ABF4455CFE5832a09B5E5ccEBD320f] = true;
// Deployer
administrators[msg.sender] = true;
ambassadors_[msg.sender] = true;
}
/**
* Converts all incoming ethereum to tokens for the caller, and passes down the referral addy (if any)
*/
function buy(address _referredBy)
public
payable
returns(uint256)
{
purchaseTokens(msg.value, _referredBy);
}
/**
* Fallback function to handle ethereum that was send straight to the contract
* Unfortunately we cannot use a referral address this way.
*/
function()
payable
public
{
purchaseTokens(msg.value, 0x0);
}
/* Converts all of caller's dividends to tokens. */
function reinvest() onlyStronghands() public {
// fetch dividends
uint256 _dividends = myDividends(false); // retrieve ref. bonus later in the code
// pay out the dividends virtually
address _customerAddress = msg.sender;
payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
// retrieve ref. bonus
_dividends += referralBalance_[_customerAddress];
referralBalance_[_customerAddress] = 0;
// dispatch a buy order with the virtualized "withdrawn dividends"
uint256 _tokens = purchaseTokens(_dividends, 0x0);
// fire event
onReinvestment(_customerAddress, _dividends, _tokens);
}
/* Alias of sell() and withdraw(). */
function exit() public {
// get token count for caller & sell them all
address _customerAddress = msg.sender;
uint256 _tokens = tokenBalanceLedger_[_customerAddress];
if(_tokens > 0) sell(_tokens);
// lambo delivery service
withdraw();
}
/* Withdraws all of the callers earnings. */
function withdraw() onlyStronghands() public {
// setup data
address _customerAddress = msg.sender;
uint256 _dividends = myDividends(false); // get ref. bonus later in the code
// update dividend tracker
payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
// add ref. bonus
_dividends += referralBalance_[_customerAddress];
referralBalance_[_customerAddress] = 0;
// lambo delivery service
_customerAddress.transfer(_dividends);
// fire event
onWithdraw(_customerAddress, _dividends);
}
/* Liquifies tokens to ethereum. */
function sell(uint256 _amountOfTokens) onlyBagholders() public {
// setup data
address _customerAddress = msg.sender;
// russian hackers BTFO
require(_amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
uint256 _tokens = _amountOfTokens;
uint256 _ethereum = tokensToEthereum_(_tokens);
uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
// burn the sold tokens
tokenSupply_ = SafeMath.sub(tokenSupply_, _tokens);
tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _tokens);
// update dividends tracker
int256 _updatedPayouts = (int256) (profitPerShare_ * _tokens + (_taxedEthereum * magnitude));
payoutsTo_[_customerAddress] -= _updatedPayouts;
// dividing by zero is a bad idea
if (tokenSupply_ > 0) {
// update the amount of dividends per token
profitPerShare_ = SafeMath.add(profitPerShare_, (_dividends * magnitude) / tokenSupply_);
}
// fire event
onTokenSell(_customerAddress, _tokens, _taxedEthereum);
}
/* Transfer tokens from the caller to a new holder. * No fee! */
function transfer(address _toAddress, uint256 _amountOfTokens) onlyBagholders() public returns(bool) {
// setup
address _customerAddress = msg.sender;
// make sure we have the requested tokens
// also disables transfers until ambassador phase is over
// ( we dont want whale premines )
require(!onlyAmbassadors && _amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
// withdraw all outstanding dividends first
if(myDividends(true) > 0) withdraw();
// exchange tokens
tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
tokenBalanceLedger_[_toAddress] = SafeMath.add(tokenBalanceLedger_[_toAddress], _amountOfTokens);
// update dividend trackers
payoutsTo_[_customerAddress] -= (int256) (profitPerShare_ * _amountOfTokens);
payoutsTo_[_toAddress] += (int256) (profitPerShare_ * _amountOfTokens);
// fire event
Transfer(_customerAddress, _toAddress, _amountOfTokens);
// ERC20
return true;
}
/*---------- ADMINISTRATOR ONLY FUNCTIONS ----------*/
/**
* In case the amassador quota is not met, the administrator can manually disable the ambassador phase.
*/
function disableInitialStage()
onlyAdministrator()
public
{
onlyAmbassadors = false;
}
/**
* In case one of us dies, we need to replace ourselves.
*/
function setAdministrator(address _identifier, bool _status)
onlyAdministrator()
public
{
administrators[_identifier] = _status;
}
/**
* Precautionary measures in case we need to adjust the masternode rate.
*/
function setStakingRequirement(uint256 _amountOfTokens)
onlyAdministrator()
public
{
stakingRequirement = _amountOfTokens;
}
/**
* If we want to rebrand, we can.
*/
function setName(string _name)
onlyAdministrator()
public
{
name = _name;
}
/**
* If we want to rebrand, we can.
*/
function setSymbol(string _symbol)
onlyAdministrator()
public
{
symbol = _symbol;
}
/*---------- HELPERS AND CALCULATORS ----------*/
/**
* Method to view the current Ethereum stored in the contract
* Example: totalEthereumBalance()
*/
function totalEthereumBalance()
public
view
returns(uint)
{
return this.balance;
}
/**
* Retrieve the total token supply.
*/
function totalSupply()
public
view
returns(uint256)
{
return tokenSupply_;
}
/**
* Retrieve the tokens owned by the caller.
*/
function myTokens()
public
view
returns(uint256)
{
address _customerAddress = msg.sender;
return balanceOf(_customerAddress);
}
function referralsOf(address _customerAddress)
public
view
returns(uint256)
{
return referrals[_customerAddress];
}
function totalUsers()
public
view
returns(uint256)
{
return usersAddresses.length;
}
/**
* Retrieve the dividends owned by the caller.
* If `_includeReferralBonus` is to to 1/true, the referral bonus will be included in the calculations.
* The reason for this, is that in the frontend, we will want to get the total divs (global + ref)
* But in the internal calculations, we want them separate.
*/
function myDividends(bool _includeReferralBonus)
public
view
returns(uint256)
{
address _customerAddress = msg.sender;
return _includeReferralBonus ? dividendsOf(_customerAddress) + referralBalance_[_customerAddress] : dividendsOf(_customerAddress) ;
}
/**
* Retrieve the token balance of any single address.
*/
function balanceOf(address _customerAddress)
view
public
returns(uint256)
{
return tokenBalanceLedger_[_customerAddress];
}
/**
* Retrieve the dividend balance of any single address.
*/
function dividendsOf(address _customerAddress)
view
public
returns(uint256)
{
return (uint256) ((int256)(profitPerShare_ * tokenBalanceLedger_[_customerAddress]) - payoutsTo_[_customerAddress]) / magnitude;
}
/**
* Return the buy price of 1 individual token.
*/
function sellPrice()
public
view
returns(uint256)
{
// our calculation relies on the token supply, so we need supply. Doh.
if(tokenSupply_ == 0){
return tokenPriceInitial_ - tokenPriceIncremental_;
} else {
uint256 _ethereum = tokensToEthereum_(1e18);
uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
return _taxedEthereum;
}
}
/**
* Return the sell price of 1 individual token.
*/
function buyPrice()
public
view
returns(uint256)
{
// our calculation relies on the token supply, so we need supply. Doh.
if(tokenSupply_ == 0){
return tokenPriceInitial_ + tokenPriceIncremental_;
} else {
uint256 _ethereum = tokensToEthereum_(1e18);
uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, entryFee_), 100);
uint256 _taxedEthereum = SafeMath.add(_ethereum, _dividends);
return _taxedEthereum;
}
}
/**
* Function for the frontend to dynamically retrieve the price scaling of buy orders.
*/
function calculateTokensReceived(uint256 _ethereumToSpend)
public
view
returns(uint256)
{
uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereumToSpend, entryFee_), 100);
uint256 _taxedEthereum = SafeMath.sub(_ethereumToSpend, _dividends);
uint256 _amountOfTokens = ethereumToTokens_(_taxedEthereum);
return _amountOfTokens;
}
/**
* Function for the frontend to dynamically retrieve the price scaling of sell orders.
*/
function calculateEthereumReceived(uint256 _tokensToSell)
public
view
returns(uint256)
{
require(_tokensToSell <= tokenSupply_);
uint256 _ethereum = tokensToEthereum_(_tokensToSell);
uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
return _taxedEthereum;
}
/*==========================================
= INTERNAL FUNCTIONS =
==========================================*/
function purchaseTokens(uint256 _incomingEthereum, address _referredBy)
antiEarlyWhale(_incomingEthereum)
internal
returns(uint256)
{
// data setup
address _customerAddress = msg.sender;
uint256 _undividedDividends = SafeMath.div(SafeMath.mul(_incomingEthereum, entryFee_), 100);
uint256 _referralBonus = SafeMath.div(SafeMath.mul(_undividedDividends, refferalFee_), 100);
uint256 _dividends = SafeMath.sub(_undividedDividends, _referralBonus);
uint256 _taxedEthereum = SafeMath.sub(_incomingEthereum, _undividedDividends);
uint256 _amountOfTokens = ethereumToTokens_(_taxedEthereum);
uint256 _fee = _dividends * magnitude;
// no point in continuing execution if OP is a poorfag russian hacker
// prevents overflow in the case that the pyramid somehow magically starts being used by everyone in the world
// (or hackers)
// and yes we know that the safemath function automatically rules out the "greater then" equasion.
require(_amountOfTokens > 0 && (SafeMath.add(_amountOfTokens,tokenSupply_) > tokenSupply_));
// is the user referred by a masternode?
if(
// is this a referred purchase?
_referredBy != 0x0000000000000000000000000000000000000000 &&
// no cheating!
_referredBy != _customerAddress &&
// does the referrer have at least X whole tokens?
// i.e is the referrer a Kekly chad masternode
tokenBalanceLedger_[_referredBy] >= stakingRequirement
){
// wealth redistribution
referralBalance_[_referredBy] = SafeMath.add(referralBalance_[_referredBy], _referralBonus);
if (isUser[_customerAddress] == false) {
referrals[_referredBy]++;
}
} else {
// no ref purchase
// add the referral bonus back to the global dividends cake
_dividends = SafeMath.add(_dividends, _referralBonus);
_fee = _dividends * magnitude;
}
if (isUser[_customerAddress] == false ) {
isUser[_customerAddress] = true;
usersAddresses.push(_customerAddress);
}
// we can't give people infinite ethereum
if(tokenSupply_ > 0){
// add tokens to the pool
tokenSupply_ = SafeMath.add(tokenSupply_, _amountOfTokens);
// take the amount of dividends gained through this transaction, and allocates them evenly to each shareholder
profitPerShare_ += (_dividends * magnitude / (tokenSupply_));
// calculate the amount of tokens the customer receives over his purchase
_fee = _fee - (_fee-(_amountOfTokens * (_dividends * magnitude / (tokenSupply_))));
} else {
// add tokens to the pool
tokenSupply_ = _amountOfTokens;
}
// update circulating supply & the ledger address for the customer
tokenBalanceLedger_[_customerAddress] = SafeMath.add(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
// Tells the contract that the buyer doesn't deserve dividends for the tokens before they owned them;
//really i know you think you do but you don't
int256 _updatedPayouts = (int256) ((profitPerShare_ * _amountOfTokens) - _fee);
payoutsTo_[_customerAddress] += _updatedPayouts;
// fire event
onTokenPurchase(_customerAddress, _incomingEthereum, _amountOfTokens, _referredBy);
return _amountOfTokens;
}
/**
* Calculate Token price based on an amount of incoming ethereum
* It's an algorithm, hopefully we gave you the whitepaper with it in scientific notation;
* Some conversions occurred to prevent decimal errors or underflows / overflows in solidity code.
*/
function ethereumToTokens_(uint256 _ethereum)
internal
view
returns(uint256)
{
uint256 _tokenPriceInitial = tokenPriceInitial_ * 1e18;
uint256 _tokensReceived =
(
(
// underflow attempts BTFO
SafeMath.sub(
(sqrt
(
(_tokenPriceInitial**2)
+
(2*(tokenPriceIncremental_ * 1e18)*(_ethereum * 1e18))
+
(((tokenPriceIncremental_)**2)*(tokenSupply_**2))
+
(2*(tokenPriceIncremental_)*_tokenPriceInitial*tokenSupply_)
)
), _tokenPriceInitial
)
)/(tokenPriceIncremental_)
)-(tokenSupply_)
;
return _tokensReceived;
}
/**
* Calculate token sell value.
* It's an algorithm, hopefully we gave you the whitepaper with it in scientific notation;
* Some conversions occurred to prevent decimal errors or underflows / overflows in solidity code.
*/
function tokensToEthereum_(uint256 _tokens)
internal
view
returns(uint256)
{
uint256 tokens_ = (_tokens + 1e18);
uint256 _tokenSupply = (tokenSupply_ + 1e18);
uint256 _etherReceived =
(
// underflow attempts BTFO
SafeMath.sub(
(
(
(
tokenPriceInitial_ +(tokenPriceIncremental_ * (_tokenSupply/1e18))
)-tokenPriceIncremental_
)*(tokens_ - 1e18)
),(tokenPriceIncremental_*((tokens_**2-tokens_)/1e18))/2
)
/1e18);
return _etherReceived;
}
//This is where all your gas goes, sorry
//Not sorry, you probably only paid 1 gwei
function sqrt(uint x) internal pure returns (uint y) {
uint z = (x + 1) / 2;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
|
* Function for the frontend to dynamically retrieve the price scaling of sell orders./
|
function calculateEthereumReceived(uint256 _tokensToSell)
public
view
returns(uint256)
{
require(_tokensToSell <= tokenSupply_);
uint256 _ethereum = tokensToEthereum_(_tokensToSell);
uint256 _dividends = SafeMath.div(SafeMath.mul(_ethereum, exitFee_), 100);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
return _taxedEthereum;
}
==========================================*/
| 565,036
|
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//Address: 0x1ffdbcecea31ea4f8a659f6ba0dc314983db872d
//Contract name: ClientsHandler
//Balance: 0 Ether
//Verification Date: 4/30/2018
//Transacion Count: 1
// CODE STARTS HERE
pragma solidity ^0.4.21;
/**
* @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);
function Ownable() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract ManageableContract is Ownable {
mapping (address => bool) internal pf_manager; // SP maganer, Artificial Intelligence AI in the fuature
uint256[] internal pf_m_count; // clients tasks counter
mapping (address => bool) internal performers;
uint256[] internal pf_count; // clients tasks counter
mapping (address => bool) internal cr_manager; // client relations manager CR-Manager
uint256[] internal cr_count; // clients tasks counter
mapping (address => bool) internal clients;
uint256[] internal cli_count; // clients tasks counter
// MODIFIERS
modifier is_cli() {
require(clients[msg.sender] == true);
_;
}
modifier is_no_cli() {
require(clients[msg.sender] == true);
_;
}
modifier is_cr_mng() {
require(cr_manager[msg.sender] == true);
_;
}
modifier is_pfm() {
require(performers[msg.sender] == true);
_;
}
modifier is_pf_mng() {
require(pf_manager[msg.sender] == true);
_;
}
modifier is_cli_trust() {
require(
owner == msg.sender ||
cr_manager[msg.sender] == true
);
_;
}
modifier is_cli_or_trust() {
require(
clients[msg.sender] == true ||
owner == msg.sender ||
cr_manager[msg.sender] == true ||
performers[msg.sender] == true ||
pf_manager[msg.sender] == true
);
_;
}
modifier is_trust() {
require(
owner == msg.sender ||
cr_manager[msg.sender] == true ||
performers[msg.sender] == true ||
pf_manager[msg.sender] == true
);
_;
}
function setPFManager(address _manager) public onlyOwner
returns (bool, address)
{
pf_manager[_manager] = true;
pf_m_count.push(1);
return (true, _manager);
}
function setPerformer(address _to) public onlyOwner
returns (bool, address)
{
performers[_to] = true;
pf_count.push(1);
return (true, _to);
}
function setCRManager(address _manager) public onlyOwner
returns (bool, address)
{
cr_manager[_manager] = true;
cr_count.push(1);
return (true, _manager);
}
/** get client task length */
function countPerformers() public view returns (uint256) {
return pf_m_count.length;
}
/** get client task length */
function countPerfManagers() public view returns (uint256) {
return pf_count.length;
}
/** get client task length */
function countCliManagers() public view returns (uint256) {
return cr_count.length;
}
/** get client task length */
function countCliTasks() public view returns (uint256) {
return cli_count.length;
}
}
contract Converter {
function bytes32ToBytes(bytes32 data) internal pure returns (bytes) {
uint i = 0;
while (i < 32 && uint(data[i]) != 0) {
++i;
}
bytes memory result = new bytes(i);
i = 0;
while (i < 32 && data[i] != 0) {
result[i] = data[i];
++i;
}
return result;
}
/** @dev concat bytes array */
function bytes32ArrayToString(bytes32[] data) internal pure returns (string) {
bytes memory bytesString = new bytes(data.length * 32);
uint urlLength;
for (uint i=0; i<data.length; i++) {
for (uint j=0; j<32; j++) {
byte char = byte(bytes32(uint(data[i]) * 2 ** (8 * j)));
if (char != 0) {
bytesString[urlLength] = char;
urlLength += 1;
}
}
}
bytes memory bytesStringTrimmed = new bytes(urlLength);
for (i=0; i<urlLength; i++) {
bytesStringTrimmed[i] = bytesString[i];
}
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 addressToBytes(address a) internal pure returns (bytes32 b){
assembly {
let m := mload(0x40)
mstore(add(m, 20), xor(0x140000000000000000000000000000000000000000, a))
mstore(0x40, add(m, 52))
b := m
}
}
function bytesToBytes32(bytes b, uint offset) internal pure returns (bytes32) {
bytes32 out;
for (uint i = 0; i < 32; i++) {
out |= bytes32(b[offset + i] & 0xFF) >> (i * 8);
}
return out;
}
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);
}
}
//Только чтобы с сайта мечты/задачи и статус исполнителя писался в смарт контракт
/** warning add divide rule beatween accepted tasks and wiev rules for */
contract ClientsHandler is ManageableContract, Converter {
function ClientsHandler() public {
setPFManager(owner);
setCRManager(owner);
}
string name = "Clients Handler";
string descibe = "Clients data storage, contain methods for their obtaining and auditing";
string version = "0.28";
// @dev defaul validtor values
uint256 dml = 3;
uint256 dmxl = 100;
uint256 tml = 3;
uint256 tmxl = 1000;
struct DreamStructData {
string hashId;
string dream;
string target;
bool isDream;
bool hasPerformer;
address performer;
}
struct DreamStruct {
bool isClient;
uint256[] key;
}
mapping(address => mapping(uint256 => DreamStructData)) internal DSData;
mapping(address => DreamStruct) internal DStructs;
address[] public clientsList; //count users
struct DreamStructDataP {
bool isValid;
address client;
uint256 client_id;
}
struct DreamStructP {
bool isPerformer;
uint256[] key;
}
mapping(address => mapping(uint256 => DreamStructDataP)) internal DSDataP;
mapping(address => DreamStructP) internal DStructsP;
address[] public performerList; //count users
function watchPreferersTasks(address entityAddress, uint256 _id) public view {
DSDataP[entityAddress][_id];
}
/** @dev return data of client's dream by id */
function getDStructData(address _who, uint256 _dream_id)
public
view
is_cli_or_trust
returns(string, string)
{
require(DSData[_who][_dream_id].isDream == true);
return (
DSData[_who][_dream_id].dream,
DSData[_who][_dream_id].target
);
}
function isClient(address entityAddress) public constant returns(bool isIndeed) {
return DStructs[entityAddress].isClient;
}
function countClients() public constant returns(uint256 cCount) {
return clientsList.length;
}
function countAllCliDrm() public constant returns(uint256 acdCount) {
uint256 l = countClients();
uint256 r = 0;
for(uint256 i=0; i<l; i++) {
r += countCliDreams(clientsList[i]);
}
return r;
}
function countCliDreams(address _addr) public view returns(uint256 cdCount) {
return DStructs[_addr].key.length;
}
function countPerfClients(address _addr) public view returns(uint256 cdpCount) {
return DStructsP[_addr].key.length;
}
function findAllCliWithPendingTask(address _addr) public returns(address[] noPerform) {
uint256 l = countClients();
address[] storage r;
for(uint256 i=0; i<l; i++) {
uint256 ll = countCliDreams(clientsList[i]);
for(uint256 ii=0; ii<ll; ii++) {
uint256 li = ii + 1;
if(DSData[_addr][li].hasPerformer == false) {
r.push(_addr);
}
}
}
return r;
}
/** @dev by the address of client set performer for pending task */
function findCliPendTAndSetPrfm(address _addr, address _performer) public returns(uint256) {
uint256 l = countCliDreams(_addr);
for(uint256 i=0; i<l; i++) {
uint256 li = i + 1;
if(DSData[_addr][li].hasPerformer == false) {
DSData[_addr][li].hasPerformer = true;
DSData[_addr][li].performer = _performer;
uint256 pLen = countPerfClients(_performer);
uint256 iLen = pLen + 1;
DSDataP[_performer][iLen].client = _addr;
DSDataP[_performer][iLen].client_id = li;
DSDataP[_performer][iLen].isValid = true;
return performerList.push(_addr);
}
}
}
/** @dev change perferfer for uncomplited task if he is fail */
function changePrefererForTask(address _addr, uint256 _id, address _performer) public is_pf_mng returns(bool) {
require(performers[_performer] == true);
if(DSData[_addr][_id].isDream == true) {
DSData[_addr][_id].hasPerformer = true;
DSData[_addr][_id].performer = _performer;
return true;
}
}
function setValidatorForND(
uint256 dream_min_len,
uint256 target_min_len,
uint256 dream_max_len,
uint256 target_max_len
)
public
onlyOwner
returns (bool)
{
dml = dream_min_len;
dmxl = dream_max_len;
tml = target_min_len;
tmxl = target_max_len;
return true;
}
modifier validatorD(string dream, string target) {
require(
(bytes(dream).length > dml) &&
(bytes(dream).length <= dmxl) &&
(bytes(target).length > tml) &&
(bytes(target).length <= tmxl)
);
_;
}
/** @dev allow for all who want stand client */
function newDream(address entityAddress, string dream, string target)
public
validatorD(dream, target)
returns (uint256 rowNumber)
{
clients[entityAddress] = true;
DStructs[entityAddress].key.push(1);
DStructs[entityAddress].isClient = true;
uint256 cliLen = countCliDreams(entityAddress);
uint256 incLen = cliLen + 1;
DSData[entityAddress][incLen].dream = dream;
DSData[entityAddress][incLen].target = target;
DSData[entityAddress][incLen].isDream = true;
return clientsList.push(entityAddress);
}
/** @dev allow for all who want stand client */
function updateDream(address entityAddress, string dream, string target)
public
is_cli_trust
validatorD(dream, target)
returns (bool success)
{
//DStructs[entityAddress].key.push(1);
uint256 cliLen = countCliDreams(entityAddress);
uint256 incLen = cliLen + 1;
DSData[entityAddress][incLen].dream = dream;
DSData[entityAddress][incLen].target = target;
DSData[entityAddress][incLen].isDream = true;
return true;
}
/* function makeUnicTaskHashId(address who) internal view returns (bytes32) {
string memory d = bytes32ToString(uintToBytes(block.difficulty));
string memory bh = bytes32ToString(block.blockhash(block.number));
string memory t = bytes32ToString(uintToBytes(block.timestamp));
string memory w = bytes32ToString(addressToBytes(who));
string memory s1 = " ".toSlice().concat(d.toSlice());
string memory sb1 = string(bh.toSlice().concat(s1.toSlice()));
string memory s2 = " ".toSlice().concat(sb1.toSlice());
string memory sb2 = string(t.toSlice().concat(s2.toSlice()));
string memory s3 = " ".toSlice().concat(sb2.toSlice());
string memory sb3 = string(w.toSlice().concat(s3.toSlice()));
return keccak256(sb3);
}*/
}
|
clients tasks counter
|
uint256[] internal pf_m_count;
| 898,062
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// SPDX-License-Identifier: MIT
// Special Thanks to @BoringCrypto for his ideas and patience
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/math/SignedSafeMath.sol
library SignedSafeMath {
int256 constant private _INT256_MIN = -2**255;
/**
* @dev Returns the multiplication of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
int256 c = a * b;
require(c / a == b, "SignedSafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two signed integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0, "SignedSafeMath: division by zero");
require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
int256 c = a / b;
return c;
}
/**
* @dev Returns the subtraction of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");
return c;
}
/**
* @dev Returns the addition of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");
return c;
}
function toUInt256(int256 a) internal pure returns (uint256) {
require(a >= 0, "Integer < 0");
return uint256(a);
}
}
/// @notice A library for performing overflow-/underflow-safe math,
/// updated with awesomeness from of DappHub (https://github.com/dapphub/ds-math).
library BoringMath {
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
require((c = a + b) >= b, "BoringMath: Add Overflow");
}
function sub(uint256 a, uint256 b) internal pure returns (uint256 c) {
require((c = a - b) <= a, "BoringMath: Underflow");
}
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
require(b == 0 || (c = a * b) / b == a, "BoringMath: Mul Overflow");
}
function to128(uint256 a) internal pure returns (uint128 c) {
require(a <= uint128(-1), "BoringMath: uint128 Overflow");
c = uint128(a);
}
function to64(uint256 a) internal pure returns (uint64 c) {
require(a <= uint64(-1), "BoringMath: uint64 Overflow");
c = uint64(a);
}
function to32(uint256 a) internal pure returns (uint32 c) {
require(a <= uint32(-1), "BoringMath: uint32 Overflow");
c = uint32(a);
}
}
/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint128.
library BoringMath128 {
function add(uint128 a, uint128 b) internal pure returns (uint128 c) {
require((c = a + b) >= b, "BoringMath: Add Overflow");
}
function sub(uint128 a, uint128 b) internal pure returns (uint128 c) {
require((c = a - b) <= a, "BoringMath: Underflow");
}
}
contract BoringOwnableData {
address public owner;
address public pendingOwner;
}
contract BoringOwnable is BoringOwnableData {
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/// @notice `owner` defaults to msg.sender on construction.
constructor() public {
owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
/// @notice Transfers ownership to `newOwner`. Either directly or claimable by the new pending owner.
/// Can only be invoked by the current `owner`.
/// @param newOwner Address of the new owner.
/// @param direct True if `newOwner` should be set immediately. False if `newOwner` needs to use `claimOwnership`.
/// @param renounce Allows the `newOwner` to be `address(0)` if `direct` and `renounce` is True. Has no effect otherwise.
function transferOwnership(
address newOwner,
bool direct,
bool renounce
) public onlyOwner {
if (direct) {
// Checks
require(newOwner != address(0) || renounce, "Ownable: zero address");
// Effects
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
pendingOwner = address(0);
} else {
// Effects
pendingOwner = newOwner;
}
}
/// @notice Needs to be called by `pendingOwner` to claim ownership.
function claimOwnership() public {
address _pendingOwner = pendingOwner;
// Checks
require(msg.sender == _pendingOwner, "Ownable: caller != pending owner");
// Effects
emit OwnershipTransferred(owner, _pendingOwner);
owner = _pendingOwner;
pendingOwner = address(0);
}
/// @notice Only allows the `owner` to execute the function.
modifier onlyOwner() {
require(msg.sender == owner, "Ownable: caller is not the owner");
_;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, 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);
/// @notice EIP 2612
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
library BoringERC20 {
bytes4 private constant SIG_SYMBOL = 0x95d89b41; // symbol()
bytes4 private constant SIG_NAME = 0x06fdde03; // name()
bytes4 private constant SIG_DECIMALS = 0x313ce567; // decimals()
bytes4 private constant SIG_TRANSFER = 0xa9059cbb; // transfer(address,uint256)
bytes4 private constant SIG_TRANSFER_FROM = 0x23b872dd; // transferFrom(address,address,uint256)
function returnDataToString(bytes memory data) internal pure returns (string memory) {
if (data.length >= 64) {
return abi.decode(data, (string));
} else if (data.length == 32) {
uint8 i = 0;
while(i < 32 && data[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && data[i] != 0; i++) {
bytesArray[i] = data[i];
}
return string(bytesArray);
} else {
return "???";
}
}
/// @notice Provides a safe ERC20.symbol version which returns '???' as fallback string.
/// @param token The address of the ERC-20 token contract.
/// @return (string) Token symbol.
function safeSymbol(IERC20 token) internal view returns (string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_SYMBOL));
return success ? returnDataToString(data) : "???";
}
/// @notice Provides a safe ERC20.name version which returns '???' as fallback string.
/// @param token The address of the ERC-20 token contract.
/// @return (string) Token name.
function safeName(IERC20 token) internal view returns (string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_NAME));
return success ? returnDataToString(data) : "???";
}
/// @notice Provides a safe ERC20.decimals version which returns '18' as fallback value.
/// @param token The address of the ERC-20 token contract.
/// @return (uint8) Token decimals.
function safeDecimals(IERC20 token) internal view returns (uint8) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_DECIMALS));
return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
}
/// @notice Provides a safe ERC20.transfer version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransfer(
IERC20 token,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: Transfer failed");
}
/// @notice Provides a safe ERC20.transferFrom version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param from Transfer tokens from.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER_FROM, from, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: TransferFrom failed");
}
}
contract BaseBoringBatchable {
/// @dev Helper function to extract a useful revert message from a failed call.
/// If the returned data is malformed or not correctly abi encoded then this call can fail itself.
function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
// If the _res length is less than 68, then the transaction failed silently (without a revert message)
if (_returnData.length < 68) return "Transaction reverted silently";
assembly {
// Slice the sighash.
_returnData := add(_returnData, 0x04)
}
return abi.decode(_returnData, (string)); // All that remains is the revert string
}
/// @notice Allows batched call to self (this contract).
/// @param calls An array of inputs for each call.
/// @param revertOnFail If True then reverts after a failed call and stops doing further calls.
/// @return successes An array indicating the success of a call, mapped one-to-one to `calls`.
/// @return results An array with the returned data of each function call, mapped one-to-one to `calls`.
// F1: External is ok here because this is the batch function, adding it to a batch makes no sense
// F2: Calls in the batch may be payable, delegatecall operates in the same context, so each call in the batch has access to msg.value
// C3: The length of the loop is fully under user control, so can't be exploited
// C7: Delegatecall is only used on the same contract, so it's safe
function batch(bytes[] calldata calls, bool revertOnFail) external payable returns (bool[] memory successes, bytes[] memory results) {
successes = new bool[](calls.length);
results = new bytes[](calls.length);
for (uint256 i = 0; i < calls.length; i++) {
(bool success, bytes memory result) = address(this).delegatecall(calls[i]);
require(success || !revertOnFail, _getRevertMsg(result));
successes[i] = success;
results[i] = result;
}
}
}
contract BoringBatchable is BaseBoringBatchable {
/// @notice Call wrapper that performs `ERC20.permit` on `token`.
/// Lookup `IERC20.permit`.
// F6: Parameters can be used front-run the permit and the user's permit will fail (due to nonce or other revert)
// if part of a batch this could be used to grief once as the second call would not need the permit
function permitToken(
IERC20 token,
address from,
address to,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public {
token.permit(from, to, amount, deadline, v, r, s);
}
}
interface IRewarder {
using BoringERC20 for IERC20;
function onSushiReward(uint256 pid, address user, address recipient, uint256 sushiAmount, uint256 newLpAmount) external;
function pendingTokens(uint256 pid, address user, uint256 sushiAmount) external view returns (IERC20[] memory, uint256[] memory);
}
interface IMigratorChef {
// Take the current LP token address and return the new LP token address.
// Migrator should have full access to the caller's LP token.
function migrate(IERC20 token) external returns (IERC20);
}
interface IMasterChef {
using BoringERC20 for IERC20;
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
}
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. SUSHI to distribute per block.
uint256 lastRewardBlock; // Last block number that SUSHI distribution occurs.
uint256 accSushiPerShare; // Accumulated SUSHI per share, times 1e12. See below.
}
function poolInfo(uint256 pid) external view returns (IMasterChef.PoolInfo memory);
function totalAllocPoint() external view returns (uint256);
function deposit(uint256 _pid, uint256 _amount) external;
}
/// @notice The (older) MasterChef contract gives out a constant number of SUSHI tokens per block.
/// It is the only address with minting rights for SUSHI.
/// The idea for this MasterChef V2 (MCV2) contract is therefore to be the owner of a dummy token
/// that is deposited into the MasterChef V1 (MCV1) contract.
/// The allocation point for this pool on MCV1 is the total allocation point for all pools that receive double incentives.
contract MasterChefV2 is BoringOwnable, BoringBatchable {
using BoringMath for uint256;
using BoringMath128 for uint128;
using BoringERC20 for IERC20;
using SignedSafeMath for int256;
/// @notice Info of each MCV2 user.
/// `amount` LP token amount the user has provided.
/// `rewardDebt` The amount of SUSHI entitled to the user.
struct UserInfo {
uint256 amount;
int256 rewardDebt;
}
/// @notice Info of each MCV2 pool.
/// `allocPoint` The amount of allocation points assigned to the pool.
/// Also known as the amount of SUSHI to distribute per block.
struct PoolInfo {
uint128 accSushiPerShare;
uint64 lastRewardBlock;
uint64 allocPoint;
}
/// @notice Address of MCV1 contract.
IMasterChef public immutable MASTER_CHEF;
/// @notice Address of SUSHI contract.
IERC20 public immutable SUSHI;
/// @notice The index of MCV2 master pool in MCV1.
uint256 public immutable MASTER_PID;
// @notice The migrator contract. It has a lot of power. Can only be set through governance (owner).
IMigratorChef public migrator;
/// @notice Info of each MCV2 pool.
PoolInfo[] public poolInfo;
/// @notice Address of the LP token for each MCV2 pool.
IERC20[] public lpToken;
/// @notice Address of each `IRewarder` contract in MCV2.
IRewarder[] public rewarder;
/// @notice Info of each user that stakes LP tokens.
mapping (uint256 => mapping (address => UserInfo)) public userInfo;
/// @dev Total allocation points. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint;
uint256 private constant MASTERCHEF_SUSHI_PER_BLOCK = 1e20;
uint256 private constant ACC_SUSHI_PRECISION = 1e12;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
event LogPoolAddition(uint256 indexed pid, uint256 allocPoint, IERC20 indexed lpToken, IRewarder indexed rewarder);
event LogSetPool(uint256 indexed pid, uint256 allocPoint, IRewarder indexed rewarder, bool overwrite);
event LogUpdatePool(uint256 indexed pid, uint64 lastRewardBlock, uint256 lpSupply, uint256 accSushiPerShare);
event LogInit();
/// @param _MASTER_CHEF The SushiSwap MCV1 contract address.
/// @param _sushi The SUSHI token contract address.
/// @param _MASTER_PID The pool ID of the dummy token on the base MCV1 contract.
constructor(IMasterChef _MASTER_CHEF, IERC20 _sushi, uint256 _MASTER_PID) public {
MASTER_CHEF = _MASTER_CHEF;
SUSHI = _sushi;
MASTER_PID = _MASTER_PID;
}
/// @notice Deposits a dummy token to `MASTER_CHEF` MCV1. This is required because MCV1 holds the minting rights for SUSHI.
/// Any balance of transaction sender in `dummyToken` is transferred.
/// The allocation point for the pool on MCV1 is the total allocation point for all pools that receive double incentives.
/// @param dummyToken The address of the ERC-20 token to deposit into MCV1.
function init(IERC20 dummyToken) external {
uint256 balance = dummyToken.balanceOf(msg.sender);
require(balance != 0, "MasterChefV2: Balance must exceed 0");
dummyToken.safeTransferFrom(msg.sender, address(this), balance);
dummyToken.approve(address(MASTER_CHEF), balance);
MASTER_CHEF.deposit(MASTER_PID, balance);
emit LogInit();
}
/// @notice Returns the number of MCV2 pools.
function poolLength() public view returns (uint256 pools) {
pools = poolInfo.length;
}
/// @notice Add a new LP to the pool. Can only be called by the owner.
/// DO NOT add the same LP token more than once. Rewards will be messed up if you do.
/// @param allocPoint AP of the new pool.
/// @param _lpToken Address of the LP ERC-20 token.
/// @param _rewarder Address of the rewarder delegate.
function add(uint256 allocPoint, IERC20 _lpToken, IRewarder _rewarder) public onlyOwner {
uint256 lastRewardBlock = block.number;
totalAllocPoint = totalAllocPoint.add(allocPoint);
lpToken.push(_lpToken);
rewarder.push(_rewarder);
poolInfo.push(PoolInfo({
allocPoint: allocPoint.to64(),
lastRewardBlock: lastRewardBlock.to64(),
accSushiPerShare: 0
}));
emit LogPoolAddition(lpToken.length.sub(1), allocPoint, _lpToken, _rewarder);
}
/// @notice Update the given pool's SUSHI allocation point and `IRewarder` contract. Can only be called by the owner.
/// @param _pid The index of the pool. See `poolInfo`.
/// @param _allocPoint New AP of the pool.
/// @param _rewarder Address of the rewarder delegate.
/// @param overwrite True if _rewarder should be `set`. Otherwise `_rewarder` is ignored.
function set(uint256 _pid, uint256 _allocPoint, IRewarder _rewarder, bool overwrite) public onlyOwner {
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
poolInfo[_pid].allocPoint = _allocPoint.to64();
if (overwrite) { rewarder[_pid] = _rewarder; }
emit LogSetPool(_pid, _allocPoint, overwrite ? _rewarder : rewarder[_pid], overwrite);
}
/// @notice Set the `migrator` contract. Can only be called by the owner.
/// @param _migrator The contract address to set.
function setMigrator(IMigratorChef _migrator) public onlyOwner {
migrator = _migrator;
}
/// @notice Migrate LP token to another LP contract through the `migrator` contract.
/// @param _pid The index of the pool. See `poolInfo`.
function migrate(uint256 _pid) public {
require(address(migrator) != address(0), "MasterChefV2: no migrator set");
IERC20 _lpToken = lpToken[_pid];
uint256 bal = _lpToken.balanceOf(address(this));
_lpToken.approve(address(migrator), bal);
IERC20 newLpToken = migrator.migrate(_lpToken);
require(bal == newLpToken.balanceOf(address(this)), "MasterChefV2: migrated balance must match");
lpToken[_pid] = newLpToken;
}
/// @notice View function to see pending SUSHI on frontend.
/// @param _pid The index of the pool. See `poolInfo`.
/// @param _user Address of user.
/// @return pending SUSHI reward for a given user.
function pendingSushi(uint256 _pid, address _user) external view returns (uint256 pending) {
PoolInfo memory pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accSushiPerShare = pool.accSushiPerShare;
uint256 lpSupply = lpToken[_pid].balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 blocks = block.number.sub(pool.lastRewardBlock);
uint256 sushiReward = blocks.mul(sushiPerBlock()).mul(pool.allocPoint) / totalAllocPoint;
accSushiPerShare = accSushiPerShare.add(sushiReward.mul(ACC_SUSHI_PRECISION) / lpSupply);
}
pending = int256(user.amount.mul(accSushiPerShare) / ACC_SUSHI_PRECISION).sub(user.rewardDebt).toUInt256();
}
/// @notice Update reward variables for all pools. Be careful of gas spending!
/// @param pids Pool IDs of all to be updated. Make sure to update all active pools.
function massUpdatePools(uint256[] calldata pids) external {
uint256 len = pids.length;
for (uint256 i = 0; i < len; ++i) {
updatePool(pids[i]);
}
}
/// @notice Calculates and returns the `amount` of SUSHI per block.
function sushiPerBlock() public view returns (uint256 amount) {
amount = uint256(MASTERCHEF_SUSHI_PER_BLOCK)
.mul(MASTER_CHEF.poolInfo(MASTER_PID).allocPoint) / MASTER_CHEF.totalAllocPoint();
}
/// @notice Update reward variables of the given pool.
/// @param pid The index of the pool. See `poolInfo`.
/// @return pool Returns the pool that was updated.
function updatePool(uint256 pid) public returns (PoolInfo memory pool) {
pool = poolInfo[pid];
if (block.number > pool.lastRewardBlock) {
uint256 lpSupply = lpToken[pid].balanceOf(address(this));
if (lpSupply > 0) {
uint256 blocks = block.number.sub(pool.lastRewardBlock);
uint256 sushiReward = blocks.mul(sushiPerBlock()).mul(pool.allocPoint) / totalAllocPoint;
pool.accSushiPerShare = pool.accSushiPerShare.add((sushiReward.mul(ACC_SUSHI_PRECISION) / lpSupply).to128());
}
pool.lastRewardBlock = block.number.to64();
poolInfo[pid] = pool;
emit LogUpdatePool(pid, pool.lastRewardBlock, lpSupply, pool.accSushiPerShare);
}
}
/// @notice Deposit LP tokens to MCV2 for SUSHI allocation.
/// @param pid The index of the pool. See `poolInfo`.
/// @param amount LP token amount to deposit.
/// @param to The receiver of `amount` deposit benefit.
function deposit(uint256 pid, uint256 amount, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][to];
// Effects
user.amount = user.amount.add(amount);
user.rewardDebt = user.rewardDebt.add(int256(amount.mul(pool.accSushiPerShare) / ACC_SUSHI_PRECISION));
// Interactions
IRewarder _rewarder = rewarder[pid];
if (address(_rewarder) != address(0)) {
_rewarder.onSushiReward(pid, to, to, 0, user.amount);
}
lpToken[pid].safeTransferFrom(msg.sender, address(this), amount);
emit Deposit(msg.sender, pid, amount, to);
}
/// @notice Withdraw LP tokens from MCV2.
/// @param pid The index of the pool. See `poolInfo`.
/// @param amount LP token amount to withdraw.
/// @param to Receiver of the LP tokens.
function withdraw(uint256 pid, uint256 amount, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][msg.sender];
// Effects
user.rewardDebt = user.rewardDebt.sub(int256(amount.mul(pool.accSushiPerShare) / ACC_SUSHI_PRECISION));
user.amount = user.amount.sub(amount);
// Interactions
IRewarder _rewarder = rewarder[pid];
if (address(_rewarder) != address(0)) {
_rewarder.onSushiReward(pid, msg.sender, to, 0, user.amount);
}
lpToken[pid].safeTransfer(to, amount);
emit Withdraw(msg.sender, pid, amount, to);
}
/// @notice Harvest proceeds for transaction sender to `to`.
/// @param pid The index of the pool. See `poolInfo`.
/// @param to Receiver of SUSHI rewards.
function harvest(uint256 pid, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][msg.sender];
int256 accumulatedSushi = int256(user.amount.mul(pool.accSushiPerShare) / ACC_SUSHI_PRECISION);
uint256 _pendingSushi = accumulatedSushi.sub(user.rewardDebt).toUInt256();
// Effects
user.rewardDebt = accumulatedSushi;
// Interactions
if (_pendingSushi != 0) {
SUSHI.safeTransfer(to, _pendingSushi);
}
IRewarder _rewarder = rewarder[pid];
if (address(_rewarder) != address(0)) {
_rewarder.onSushiReward( pid, msg.sender, to, _pendingSushi, user.amount);
}
emit Harvest(msg.sender, pid, _pendingSushi);
}
/// @notice Withdraw LP tokens from MCV2 and harvest proceeds for transaction sender to `to`.
/// @param pid The index of the pool. See `poolInfo`.
/// @param amount LP token amount to withdraw.
/// @param to Receiver of the LP tokens and SUSHI rewards.
function withdrawAndHarvest(uint256 pid, uint256 amount, address to) public {
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][msg.sender];
int256 accumulatedSushi = int256(user.amount.mul(pool.accSushiPerShare) / ACC_SUSHI_PRECISION);
uint256 _pendingSushi = accumulatedSushi.sub(user.rewardDebt).toUInt256();
// Effects
user.rewardDebt = accumulatedSushi.sub(int256(amount.mul(pool.accSushiPerShare) / ACC_SUSHI_PRECISION));
user.amount = user.amount.sub(amount);
// Interactions
SUSHI.safeTransfer(to, _pendingSushi);
IRewarder _rewarder = rewarder[pid];
if (address(_rewarder) != address(0)) {
_rewarder.onSushiReward(pid, msg.sender, to, _pendingSushi, user.amount);
}
lpToken[pid].safeTransfer(to, amount);
emit Withdraw(msg.sender, pid, amount, to);
emit Harvest(msg.sender, pid, _pendingSushi);
}
/// @notice Harvests SUSHI from `MASTER_CHEF` MCV1 and pool `MASTER_PID` to this MCV2 contract.
function harvestFromMasterChef() public {
MASTER_CHEF.deposit(MASTER_PID, 0);
}
/// @notice Withdraw without caring about rewards. EMERGENCY ONLY.
/// @param pid The index of the pool. See `poolInfo`.
/// @param to Receiver of the LP tokens.
function emergencyWithdraw(uint256 pid, address to) public {
UserInfo storage user = userInfo[pid][msg.sender];
uint256 amount = user.amount;
user.amount = 0;
user.rewardDebt = 0;
IRewarder _rewarder = rewarder[pid];
if (address(_rewarder) != address(0)) {
_rewarder.onSushiReward(pid, msg.sender, to, 0, 0);
}
// Note: transfer can fail or succeed if `amount` is zero.
lpToken[pid].safeTransfer(to, amount);
emit EmergencyWithdraw(msg.sender, pid, amount, to);
}
}
|
@notice Add a new LP to the pool. Can only be called by the owner. DO NOT add the same LP token more than once. Rewards will be messed up if you do. @param allocPoint AP of the new pool. @param _lpToken Address of the LP ERC-20 token. @param _rewarder Address of the rewarder delegate.
|
function add(uint256 allocPoint, IERC20 _lpToken, IRewarder _rewarder) public onlyOwner {
uint256 lastRewardBlock = block.number;
totalAllocPoint = totalAllocPoint.add(allocPoint);
lpToken.push(_lpToken);
rewarder.push(_rewarder);
poolInfo.push(PoolInfo({
allocPoint: allocPoint.to64(),
lastRewardBlock: lastRewardBlock.to64(),
accSushiPerShare: 0
}));
emit LogPoolAddition(lpToken.length.sub(1), allocPoint, _lpToken, _rewarder);
}
| 1,099,146
|
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./full_match/1/0xD9F65f0d2135BeE238db9c49558632Eb6030CAa7/sources/contracts/party/PartyGovernanceNFT.sol
|
@notice Burn governance NFTs and remove their voting power. Can only be called by an authority before the party has started. @param tokenIds The IDs of the governance NFTs to burn. Authority needs to be able to burn cards during the initial crowdfund to process refunds but not after the party has started. Used to update voting power state of party at the end.
|
function burn(uint256[] memory tokenIds) public onlyAuthority {
if (_governanceValues.totalVotingPower != 0) revert UnauthorizedToBurnError();
_burnAndUpdateVotingPower(tokenIds, false);
}
| 2,943,997
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@chainlink/contracts/src/v0.8/VRFConsumerBase.sol";
contract FacaNFT is Ownable, ERC721, ERC721Enumerable, VRFConsumerBase, ReentrancyGuard {
using SafeMath for uint256;
event FacaNFTRandomnessRequest(uint timestamp);
event FacaNFTRandomnessFulfil(uint timestamp, bytes32 requestId, uint256 seed);
event FacaNFTChainlinkError(uint timestamp, bytes32 requestId);
event FacaNFTReveal(uint timestamp);
event FacaManualSetSeed(uint timestamp);
event FacaWhitelist(address adress);
event PermanentURI(string _value, uint256 indexed _id);
bool _revealed = false;
bool _requestedVRF = false;
bytes32 _keyHash;
uint private _mode = 0;
uint private _limitPrivateSaleTx = 2;
uint private _limitPublicSaleTx = 20;
uint public maxAirdrop;
uint public maxPrivateSale;
uint public totalAirdrop;
uint public totalPrivateSale;
uint public maxSupply;
uint256 public seed = 0;
uint256 private _privateSalePrice = 77000000000000000; //0.077ETH
uint256 private _publicSalePrice = 88000000000000000; //0.088ETH
string _tokenBaseURI;
string _defaultURI;
mapping(address => uint) private _originalOwns;
mapping(address => uint) private _presaleMinted;
mapping(address => bool) private _originalOwner;
mapping(address => bool) private _presaleAllowed;
/**
* @param vrfCoordinator address of Chainlink VRF coordinator to use
* @param linkToken address of LINK token
* @param keyHash Chainlink VRF keyhash for the coordinator
* @param tokenName Token name
* @param tokenSymbol Token symbol
* @param baseURI token base URI
* @param defaultURI token default URI aka loot box
* @param maximumAirdrop max amount for airdrop
* @param maximumPrivateSale max amount to sale in private sale
* @param maximumSupply max supply of token
*/
constructor(
address vrfCoordinator,
address linkToken,
bytes32 keyHash,
string memory tokenName,
string memory tokenSymbol,
string memory baseURI,
string memory defaultURI,
uint maximumAirdrop,
uint maximumPrivateSale,
uint maximumSupply
) ERC721(tokenName, tokenSymbol)
VRFConsumerBase(vrfCoordinator, linkToken) {
maxAirdrop = maximumAirdrop;
maxPrivateSale = maximumPrivateSale;
maxSupply = maximumSupply;
_keyHash = keyHash;
_tokenBaseURI = baseURI;
_defaultURI = defaultURI;
}
/**
* @dev ensure collector pays for mint token and message sender is directly interact (and not a contract)
* @param amount number of token to mint
*/
modifier mintable(uint amount) {
require( msg.sender == tx.origin , "Apes don't like bots");
if(_mode == 1) {
require(amount <= _limitPrivateSaleTx, "Number Token invalid.");
require(msg.value >= amount.mul(_privateSalePrice), "Payment error.");
}
if(_mode == 3) {
require(amount <= _limitPublicSaleTx, "Number Token invalid.");
require(msg.value >= amount.mul(_publicSalePrice), "Payment error.");
}
_;
}
/**
* @dev add collector to private sale allowlist
*/
function addAllowlist(address[] memory allowlist) public onlyOwner {
for(uint i = 0; i < allowlist.length; i+=1) {
_presaleAllowed[allowlist[i]] = true;
emit FacaWhitelist(allowlist[i]);
}
}
/**
* @dev airdrop token for marketing and influencer campaign
*/
function airdrop(address[] memory _to, uint256 amount) public onlyOwner {
require(totalAirdrop + (_to.length * amount) <= maxAirdrop, "Exceed airdop allowance limit.");
for (uint i = 0; i < _to.length; i+=1) {
mintFaca(_to[i], amount, true); // mint for marketing & influencer
}
}
/**
* @dev return token base URI to construct metadata URL
*/
function tokenBaseURI() public view returns (string memory) {
return _tokenBaseURI;
}
/**
* @dev get sale mode
* 0 - offline
* 1 - presale
* 2 - before public sale
* 3 - public sale
* 4 - close public sale
* 5 - sold out
*/
function getSaleMode() public view returns(uint) {
if (_mode == 1 && totalPrivateSale == maxPrivateSale - maxAirdrop) {
return 2;
}
if (totalSupply() - totalAirdrop == maxSupply - maxAirdrop) {
return 5;
}
return _mode;
}
/**
* @dev get sale price base on sale mode
*/
function getPrice() public view returns(uint256) {
return (_mode == 1) ? _privateSalePrice : _publicSalePrice; // return public sale price as default
}
/**
* @dev get current amount of minted token by sale mode
*/
function getMintedBySaleMode() public view returns(uint256) {
if (_mode == 1) return totalPrivateSale;
if (_mode == 3) return totalPublicSale();
return 0;
}
/**
* @dev get current token amount available for sale (by sale mode)
*/
function getMaxSupplyBySaleMode() public view returns(uint256) {
if (_mode == 1) return maxPrivateSale - maxAirdrop;
if (_mode == 3) return maxSupply - totalPrivateSale - maxAirdrop;
return 0;
}
/**
* @dev emit event for OpenSea to freeze metadata.
*/
function freezeMetadata() public onlyOwner {
for (uint256 i = 1; i <= totalSupply(); i+=1) {
emit PermanentURI(tokenURI(i), i);
}
}
/**
* @dev ensure collector is under allowlist
*/
function inAllowlist(address collector) public view returns(bool) {
return _presaleAllowed[collector];
}
/**
* @dev check if collector is an original minter
*/
function isOriginalOwner(address collector) public view returns(bool) {
return _originalOwns[collector] > 0;
}
function isRequestedVrf() public view returns(bool) {
return _requestedVRF;
}
function isRevealed() public view returns(bool) {
return _requestedVRF && _revealed;
}
/**
* @dev shuffle metadata with seed provided by VRF
*/
function metadataOf(uint256 tokenId) public view returns (string memory) {
if(_msgSender() != owner()) {
require(tokenId <= totalSupply(), "Token id invalid");
}
if(!_revealed) return "default";
uint256[] memory metaIds = new uint256[](maxSupply+1);
uint256 ss = seed;
for (uint256 i = 1; i <= maxSupply; i+=1) {
metaIds[i] = i;
}
// shuffle meta id
for (uint256 i = 1; i <= maxSupply; i+=1) {
uint256 j = (uint256(keccak256(abi.encode(ss, i))) % (maxSupply));
(metaIds[i], metaIds[j]) = (metaIds[j], metaIds[i]);
}
return Strings.toString(metaIds[tokenId]);
}
/**
* @dev Mint NFT
*/
function mintNFT(uint256 amount) public payable nonReentrant mintable(amount) returns (bool) {
require(_mode == 1 || _mode == 3, "Sale is not available");
return mintFaca(_msgSender(), amount, false);
}
/**
* @dev get amount of original minted amount.
*/
function originalMintedBalanceOf(address collector) public view returns(uint){
return _originalOwns[collector];
}
function publicSalePrice() public view returns(uint256) {
return _publicSalePrice;
}
function privateSalePrice() public view returns(uint256) {
return _privateSalePrice;
}
/**
* @dev request Chainlink VRF for a random seed
*/
function requestChainlinkVRF() public onlyOwner {
require(!_requestedVRF, "You have already generated a random seed");
require(LINK.balanceOf(address(this)) >= 2000000000000000000);
requestRandomness(_keyHash, 2000000000000000000);
_requestedVRF = true;
emit FacaNFTRandomnessRequest(block.timestamp);
}
/**
* @dev set token base URI
*/
function setBaseURI(string memory baseURI) public onlyOwner {
_tokenBaseURI = baseURI;
}
/**
* @dev reveal all lootbox
*/
function reveal() public onlyOwner {
require(!_revealed, "You can only reveal once.");
_revealed = true;
}
/**
* @dev set public sale price in case we have last minutes change on sale price/promotion
*/
function setPublicSalePrice(uint256 price) public onlyOwner {
_publicSalePrice = price;
}
/**
* @dev set seed number (only used for automate testing and emergency reveal)
*/
function setSeed(uint randomNumber) public onlyOwner {
_requestedVRF = true;
seed = randomNumber;
emit FacaManualSetSeed(block.timestamp);
}
/**
* @dev start private sale
*/
function startPrivateSale() public onlyOwner {
_mode = 1;
}
/**
* @dev change mode to before public sale
*/
function startBeforePublicSale() public onlyOwner {
_mode = 2;
}
/**
* @dev change mode to public sale
*/
function startPublicSale() public onlyOwner {
_mode = 3;
}
/**
* @dev close public sale
*/
function closePublicSale() public onlyOwner {
_mode = 4;
}
function stopAllSale() public onlyOwner {
_mode = 0;
}
function supportsInterface(
bytes4 interfaceId
) public view virtual override(ERC721, ERC721Enumerable) returns (bool) {
return super.supportsInterface(interfaceId);
}
/**
* @dev return token metadata based on reveal status
*/
function tokenURI(uint256 tokenId) public view override (ERC721) returns (string memory) {
require(tokenId <= totalSupply(), "Token not exist.");
// before we reveal, everyone will get default URI
return isRevealed() ? string(abi.encodePacked(_tokenBaseURI, metadataOf(tokenId), ".json")) :_defaultURI;
}
/**
* @dev total public sale amount
*/
function totalPublicSale() public view returns(uint) {
return totalSupply() - totalPrivateSale - totalAirdrop;
}
/**
* @dev withdraw ether to owner/admin wallet
* @notice only owner can call this method
*/
function withdraw() public onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId
) internal virtual override(ERC721, ERC721Enumerable){
super._beforeTokenTransfer(from, to, tokenId);
}
/**
* @dev ensure original minter is logged and favor for future use.
*/
function addOriginalOwns(address collector) internal {
_originalOwns[collector] += 1;
}
/**
* @dev ensure private sale amount will not exceed quota per collector
*/
function isValidPrivateSaleAmount(address collector,uint amount) internal view returns(bool) {
return _presaleMinted[collector] + amount <= _limitPrivateSaleTx;
}
/**
* @dev ensure private sale amount will not oversell
*/
function isOversell(uint amount) internal view returns(bool) {
return getMintedBySaleMode().add(amount) <= getMaxSupplyBySaleMode();
}
/**
* @dev Mints amount `amount` of token to collector
* @param collector The collector to receive the token
* @param amount The amount of token to be minted
* @param isAirdrop Flag for use in airdrop (internally)
*/
function mintFaca( address collector, uint256 amount, bool isAirdrop) internal returns (bool) {
// private sale
if(getSaleMode() == 1) {
require(inAllowlist(collector), "Only whitelist addresses allowed.");
require(isValidPrivateSaleAmount(collector, amount), "Max presale amount exceeded.");
}
if (getSaleMode() > 0 && !isAirdrop) {
require(isOversell(amount), "Cannot oversell");
}
for (uint256 i = 0; i < amount; i+=1) {
uint256 tokenIndex = totalSupply();
if (tokenIndex < maxSupply) {
_safeMint(collector, tokenIndex+1);
addOriginalOwns(collector);
}
}
logTrade(collector, amount, isAirdrop);
return true;
}
/**
* @dev receive random number from chainlink
* @notice random number will greater than zero
*/
function fulfillRandomness(bytes32 requestId, uint256 randomNumber) internal override {
if (randomNumber > 0) {
seed = randomNumber;
emit FacaNFTRandomnessFulfil(block.timestamp, requestId, seed);
}
else {
seed = 1;
emit FacaNFTChainlinkError(block.timestamp, requestId);
}
}
/**
* @dev log trade amount for controlling the capacity of tx
* @param collector collector address
* @param amount amount of sale
* @param isAirdrop flag for log airdrop transaction
*/
function logTrade(address collector,uint amount, bool isAirdrop) internal {
if (isAirdrop) {
totalAirdrop += amount;
return;
}
if (_mode == 1) {
totalPrivateSale += amount;
_presaleMinted[collector] += amount;
}
}
}
// 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 "./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 "../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;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// SPDX-License-Identifier: MIT
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;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./interfaces/LinkTokenInterface.sol";
import "./VRFRequestIDBase.sol";
/** ****************************************************************************
* @notice Interface for contracts using VRF randomness
* *****************************************************************************
* @dev PURPOSE
*
* @dev Reggie the Random Oracle (not his real job) wants to provide randomness
* @dev to Vera the verifier in such a way that Vera can be sure he's not
* @dev making his output up to suit himself. Reggie provides Vera a public key
* @dev to which he knows the secret key. Each time Vera provides a seed to
* @dev Reggie, he gives back a value which is computed completely
* @dev deterministically from the seed and the secret key.
*
* @dev Reggie provides a proof by which Vera can verify that the output was
* @dev correctly computed once Reggie tells it to her, but without that proof,
* @dev the output is indistinguishable to her from a uniform random sample
* @dev from the output space.
*
* @dev The purpose of this contract is to make it easy for unrelated contracts
* @dev to talk to Vera the verifier about the work Reggie is doing, to provide
* @dev simple access to a verifiable source of randomness.
* *****************************************************************************
* @dev USAGE
*
* @dev Calling contracts must inherit from VRFConsumerBase, and can
* @dev initialize VRFConsumerBase's attributes in their constructor as
* @dev shown:
*
* @dev contract VRFConsumer {
* @dev constuctor(<other arguments>, address _vrfCoordinator, address _link)
* @dev VRFConsumerBase(_vrfCoordinator, _link) public {
* @dev <initialization with other arguments goes here>
* @dev }
* @dev }
*
* @dev The oracle will have given you an ID for the VRF keypair they have
* @dev committed to (let's call it keyHash), and have told you the minimum LINK
* @dev price for VRF service. Make sure your contract has sufficient LINK, and
* @dev call requestRandomness(keyHash, fee, seed), where seed is the input you
* @dev want to generate randomness from.
*
* @dev Once the VRFCoordinator has received and validated the oracle's response
* @dev to your request, it will call your contract's fulfillRandomness method.
*
* @dev The randomness argument to fulfillRandomness is the actual random value
* @dev generated from your seed.
*
* @dev The requestId argument is generated from the keyHash and the seed by
* @dev makeRequestId(keyHash, seed). If your contract could have concurrent
* @dev requests open, you can use the requestId to track which seed is
* @dev associated with which randomness. See VRFRequestIDBase.sol for more
* @dev details. (See "SECURITY CONSIDERATIONS" for principles to keep in mind,
* @dev if your contract could have multiple requests in flight simultaneously.)
*
* @dev Colliding `requestId`s are cryptographically impossible as long as seeds
* @dev differ. (Which is critical to making unpredictable randomness! See the
* @dev next section.)
*
* *****************************************************************************
* @dev SECURITY CONSIDERATIONS
*
* @dev A method with the ability to call your fulfillRandomness method directly
* @dev could spoof a VRF response with any random value, so it's critical that
* @dev it cannot be directly called by anything other than this base contract
* @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method).
*
* @dev For your users to trust that your contract's random behavior is free
* @dev from malicious interference, it's best if you can write it so that all
* @dev behaviors implied by a VRF response are executed *during* your
* @dev fulfillRandomness method. If your contract must store the response (or
* @dev anything derived from it) and use it later, you must ensure that any
* @dev user-significant behavior which depends on that stored value cannot be
* @dev manipulated by a subsequent VRF request.
*
* @dev Similarly, both miners and the VRF oracle itself have some influence
* @dev over the order in which VRF responses appear on the blockchain, so if
* @dev your contract could have multiple VRF requests in flight simultaneously,
* @dev you must ensure that the order in which the VRF responses arrive cannot
* @dev be used to manipulate your contract's user-significant behavior.
*
* @dev Since the ultimate input to the VRF is mixed with the block hash of the
* @dev block in which the request is made, user-provided seeds have no impact
* @dev on its economic security properties. They are only included for API
* @dev compatability with previous versions of this contract.
*
* @dev Since the block hash of the block which contains the requestRandomness
* @dev call is mixed into the input to the VRF *last*, a sufficiently powerful
* @dev miner could, in principle, fork the blockchain to evict the block
* @dev containing the request, forcing the request to be included in a
* @dev different block with a different hash, and therefore a different input
* @dev to the VRF. However, such an attack would incur a substantial economic
* @dev cost. This cost scales with the number of blocks the VRF oracle waits
* @dev until it calls responds to a request.
*/
abstract contract VRFConsumerBase is VRFRequestIDBase {
/**
* @notice fulfillRandomness handles the VRF response. Your contract must
* @notice implement it. See "SECURITY CONSIDERATIONS" above for important
* @notice principles to keep in mind when implementing your fulfillRandomness
* @notice method.
*
* @dev VRFConsumerBase expects its subcontracts to have a method with this
* @dev signature, and will call it once it has verified the proof
* @dev associated with the randomness. (It is triggered via a call to
* @dev rawFulfillRandomness, below.)
*
* @param requestId The Id initially returned by requestRandomness
* @param randomness the VRF output
*/
function fulfillRandomness(
bytes32 requestId,
uint256 randomness
)
internal
virtual;
/**
* @dev In order to keep backwards compatibility we have kept the user
* seed field around. We remove the use of it because given that the blockhash
* enters later, it overrides whatever randomness the used seed provides.
* Given that it adds no security, and can easily lead to misunderstandings,
* we have removed it from usage and can now provide a simpler API.
*/
uint256 constant private USER_SEED_PLACEHOLDER = 0;
/**
* @notice requestRandomness initiates a request for VRF output given _seed
*
* @dev The fulfillRandomness method receives the output, once it's provided
* @dev by the Oracle, and verified by the vrfCoordinator.
*
* @dev The _keyHash must already be registered with the VRFCoordinator, and
* @dev the _fee must exceed the fee specified during registration of the
* @dev _keyHash.
*
* @dev The _seed parameter is vestigial, and is kept only for API
* @dev compatibility with older versions. It can't *hurt* to mix in some of
* @dev your own randomness, here, but it's not necessary because the VRF
* @dev oracle will mix the hash of the block containing your request into the
* @dev VRF seed it ultimately uses.
*
* @param _keyHash ID of public key against which randomness is generated
* @param _fee The amount of LINK to send with the request
*
* @return requestId unique ID for this request
*
* @dev The returned requestId can be used to distinguish responses to
* @dev concurrent requests. It is passed as the first argument to
* @dev fulfillRandomness.
*/
function requestRandomness(
bytes32 _keyHash,
uint256 _fee
)
internal
returns (
bytes32 requestId
)
{
LINK.transferAndCall(vrfCoordinator, _fee, abi.encode(_keyHash, USER_SEED_PLACEHOLDER));
// This is the seed passed to VRFCoordinator. The oracle will mix this with
// the hash of the block containing this request to obtain the seed/input
// which is finally passed to the VRF cryptographic machinery.
uint256 vRFSeed = makeVRFInputSeed(_keyHash, USER_SEED_PLACEHOLDER, address(this), nonces[_keyHash]);
// nonces[_keyHash] must stay in sync with
// VRFCoordinator.nonces[_keyHash][this], which was incremented by the above
// successful LINK.transferAndCall (in VRFCoordinator.randomnessRequest).
// This provides protection against the user repeating their input seed,
// which would result in a predictable/duplicate output, if multiple such
// requests appeared in the same block.
nonces[_keyHash] = nonces[_keyHash] + 1;
return makeRequestId(_keyHash, vRFSeed);
}
LinkTokenInterface immutable internal LINK;
address immutable private vrfCoordinator;
// Nonces for each VRF key from which randomness has been requested.
//
// Must stay in sync with VRFCoordinator[_keyHash][this]
mapping(bytes32 /* keyHash */ => uint256 /* nonce */) private nonces;
/**
* @param _vrfCoordinator address of VRFCoordinator contract
* @param _link address of LINK token contract
*
* @dev https://docs.chain.link/docs/link-token-contracts
*/
constructor(
address _vrfCoordinator,
address _link
) {
vrfCoordinator = _vrfCoordinator;
LINK = LinkTokenInterface(_link);
}
// rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF
// proof. rawFulfillRandomness then calls fulfillRandomness, after validating
// the origin of the call
function rawFulfillRandomness(
bytes32 requestId,
uint256 randomness
)
external
{
require(msg.sender == vrfCoordinator, "Only VRFCoordinator can fulfill");
fulfillRandomness(requestId, randomness);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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;
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;
/**
* @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;
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 "../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;
interface LinkTokenInterface {
function allowance(
address owner,
address spender
)
external
view
returns (
uint256 remaining
);
function approve(
address spender,
uint256 value
)
external
returns (
bool success
);
function balanceOf(
address owner
)
external
view
returns (
uint256 balance
);
function decimals()
external
view
returns (
uint8 decimalPlaces
);
function decreaseApproval(
address spender,
uint256 addedValue
)
external
returns (
bool success
);
function increaseApproval(
address spender,
uint256 subtractedValue
) external;
function name()
external
view
returns (
string memory tokenName
);
function symbol()
external
view
returns (
string memory tokenSymbol
);
function totalSupply()
external
view
returns (
uint256 totalTokensIssued
);
function transfer(
address to,
uint256 value
)
external
returns (
bool success
);
function transferAndCall(
address to,
uint256 value,
bytes calldata data
)
external
returns (
bool success
);
function transferFrom(
address from,
address to,
uint256 value
)
external
returns (
bool success
);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract VRFRequestIDBase {
/**
* @notice returns the seed which is actually input to the VRF coordinator
*
* @dev To prevent repetition of VRF output due to repetition of the
* @dev user-supplied seed, that seed is combined in a hash with the
* @dev user-specific nonce, and the address of the consuming contract. The
* @dev risk of repetition is mostly mitigated by inclusion of a blockhash in
* @dev the final seed, but the nonce does protect against repetition in
* @dev requests which are included in a single block.
*
* @param _userSeed VRF seed input provided by user
* @param _requester Address of the requesting contract
* @param _nonce User-specific nonce at the time of the request
*/
function makeVRFInputSeed(
bytes32 _keyHash,
uint256 _userSeed,
address _requester,
uint256 _nonce
)
internal
pure
returns (
uint256
)
{
return uint256(keccak256(abi.encode(_keyHash, _userSeed, _requester, _nonce)));
}
/**
* @notice Returns the id for this request
* @param _keyHash The serviceAgreement ID to be used for this request
* @param _vRFInputSeed The seed to be passed directly to the VRF
* @return The id for this request
*
* @dev Note that _vRFInputSeed is not the seed passed by the consuming
* @dev contract, but the one generated by makeVRFInputSeed
*/
function makeRequestId(
bytes32 _keyHash,
uint256 _vRFInputSeed
)
internal
pure
returns (
bytes32
)
{
return keccak256(abi.encodePacked(_keyHash, _vRFInputSeed));
}
}
|
* @dev change mode to before public sale/
|
function startBeforePublicSale() public onlyOwner {
_mode = 2;
}
| 1,530,471
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
// Author: Khashkhuu 'Xass1on' Gankhuyag
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/TokenTimelock.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
contract MCCToken is ERC20, Ownable {
using SafeMath for uint256;
TokenTimelock public teamTimelock;
TokenTimelock public wcPlatformTimelock;
TokenTimelock public liquidityTimelock;
TokenTimelock public investorReserveTimelock1;
TokenTimelock public investorReserveTimelock2;
TokenTimelock public investorReserveTimelock3;
TokenTimelock public investorReserveTimelock4;
uint256 constant _totalSupply = 5 * 10**11;
uint256 constant _tokenToOffer = 7.5 * 10**10;
uint256 constant _tokenTeamReserve = 2.5 * 10**10;
uint256 constant _tokenWCPlatform = 1.5 * 10**11;
uint256 constant _tokenAirdrop = 5 * 10**10;
uint256 constant _tokenStrategicReserve = 5 * 10**10;
uint256 constant _tokenLiquidity = 5 * 10**10;
uint256 constant _tokenMarketing = 2.5 * 10**10;
uint256 constant _tokenStaking = 5 * 10**10;
uint256 constant _tokenInvestorReserve1 = 6.25 * 10**9;
uint256 constant _tokenInvestorReserve2 = 6.25 * 10**9;
uint256 constant _tokenInvestorReserve3 = 6.25 * 10**9;
uint256 constant _tokenInvestorReserve4 = 6.25 * 10**9;
string constant _tokenName = "Mongolia Cashmere Coin";
string constant _tokenSymbol = "MCC";
address constant _tokenOfferAddress =
0xf715Fdce9e74D5FA4638Fc57d0DDdb43d7D78C69;
address constant _tokenTeamReserveAddress =
0x4c57BaA020291DB0a49255EaAa029863f6913eeF;
address constant _tokenWCPlatformAddress =
0x89FAB2d3F22D602B8f4Ec11373413201471a5ED2;
address constant _tokenAirdropAddress =
0xd03B501b29D31de01567fC6058cc8988f25D104E;
address constant _tokenStrategicReserveAddress =
0x4562eDa025754FC56c1c6Cd1b3dd946b36B8f5ed;
address constant _tokenLiquidityAddress =
0x4616F3b5eb6DA9134AA31422F2Ab1E1de35c5d21;
address constant _tokenMarketingAddress =
0x1A2FBCd56e9225137577DEA5fB1A651154540581;
address constant _tokenStakingAddress =
0xa0A49813dB0B278D3a56be7712DF44177b8BD8dd;
address constant _tokenInvestorReserveAddress1 =
0xd14Be6f9e08F3a9334f2B55c03C3AA1e702e642F;
address constant _tokenInvestorReserveAddress2 =
0x930BEcAD57Ca2d0395b4097Ba3ad98Ed2c354996;
address constant _tokenInvestorReserveAddress3 =
0x963148e2512679049085789151d7B5d26CE0bcAD;
address constant _tokenInvestorReserveAddress4 =
0x9c5FDe77fD0280b51C4100E3316D9C96AcB6E66E;
constructor() ERC20(_tokenName, _tokenSymbol) {
// ICO
_mint(_tokenOfferAddress, _tokenToOffer * 10**18);
// Founders, team and advisors
teamTimelock = new TokenTimelock(
this,
_tokenTeamReserveAddress,
block.timestamp + 60 * 60 * 24 * 365 * 1
);
_mint(address(teamTimelock), _tokenTeamReserve * 10**18);
// World Cashmere Platform
wcPlatformTimelock = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 365 * 5
);
_mint(address(wcPlatformTimelock), _tokenWCPlatform * 10**18);
// Airdrop
_mint(_tokenAirdropAddress, _tokenAirdrop * 10**18);
// Strategic resource
_mint(_tokenStrategicReserveAddress, _tokenStrategicReserve * 10**18);
// Liquidity
liquidityTimelock = new TokenTimelock(
this,
_tokenLiquidityAddress,
block.timestamp + 60 * 60 * 24 * 365 * 10
);
_mint(address(liquidityTimelock), _tokenLiquidity * 10**18);
// Marketing
_mint(_tokenMarketingAddress, _tokenMarketing * 10**18);
// Strategic Investor Reserve
_mint(_tokenStakingAddress, _tokenStaking * 10**18);
// Marketing
investorReserveTimelock1 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 91
);
_mint(address(investorReserveTimelock1), _tokenWCPlatform * 10**18);
investorReserveTimelock2 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 182
);
_mint(address(investorReserveTimelock2), _tokenWCPlatform * 10**18);
investorReserveTimelock3 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 273
);
_mint(address(investorReserveTimelock3), _tokenWCPlatform * 10**18);
investorReserveTimelock4 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 365
);
_mint(address(investorReserveTimelock4), _tokenWCPlatform * 10**18);
}
fallback() external payable {
revert();
}
receive() external payable {
revert();
}
function burn() public pure {
revert();
}
function operatorBurn() public pure {
revert();
}
}
|
ICO Founders, team and advisors World Cashmere Platform Airdrop Strategic resource Liquidity Marketing Strategic Investor Reserve Marketing
|
constructor() ERC20(_tokenName, _tokenSymbol) {
_mint(_tokenOfferAddress, _tokenToOffer * 10**18);
teamTimelock = new TokenTimelock(
this,
_tokenTeamReserveAddress,
block.timestamp + 60 * 60 * 24 * 365 * 1
);
_mint(address(teamTimelock), _tokenTeamReserve * 10**18);
wcPlatformTimelock = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 365 * 5
);
_mint(address(wcPlatformTimelock), _tokenWCPlatform * 10**18);
_mint(_tokenAirdropAddress, _tokenAirdrop * 10**18);
_mint(_tokenStrategicReserveAddress, _tokenStrategicReserve * 10**18);
liquidityTimelock = new TokenTimelock(
this,
_tokenLiquidityAddress,
block.timestamp + 60 * 60 * 24 * 365 * 10
);
_mint(address(liquidityTimelock), _tokenLiquidity * 10**18);
_mint(_tokenMarketingAddress, _tokenMarketing * 10**18);
_mint(_tokenStakingAddress, _tokenStaking * 10**18);
investorReserveTimelock1 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 91
);
_mint(address(investorReserveTimelock1), _tokenWCPlatform * 10**18);
investorReserveTimelock2 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 182
);
_mint(address(investorReserveTimelock2), _tokenWCPlatform * 10**18);
investorReserveTimelock3 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 273
);
_mint(address(investorReserveTimelock3), _tokenWCPlatform * 10**18);
investorReserveTimelock4 = new TokenTimelock(
this,
_tokenWCPlatformAddress,
block.timestamp + 60 * 60 * 24 * 365
);
_mint(address(investorReserveTimelock4), _tokenWCPlatform * 10**18);
}
| 15,789,605
|
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./full_match/42/0x720a59AC0dD62bD9c87D5b051BF026Ce8DC0EA99/sources/browser/test_presale_staking.sol
|
listed as tokens for an entire Ether (10^18 wei). assumes sold tokens have 18 decimals in calculations.
|
tokensPerEth[0] = (5500000 * 1e18);
| 16,253,582
|
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./partial_match/137/0xfecE55912861a401738604c52998604ba45115a1/sources/FuncAuthorizer.sol
|
@dev Default success.
|
function _postExecCheck(
TransactionData calldata transaction,
TransactionResult calldata callResult,
AuthorizerReturnData calldata preData
) internal view override returns (AuthorizerReturnData memory authData) {
authData.result = AuthResult.SUCCESS;
}
| 3,513,953
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/**
*Submitted for verification at Etherscan.io on 2021-07-08
*/
// Sources flattened with hardhat v2.4.0 https://hardhat.org
// File contracts/external/polygon/lib/RLPReader.sol
// Copied mostly from Polygon demo FxTunnel repo: https://github.com/jdkanani/fx-portal.
// There are two modifications such that this contract compiles with Solidity v8:
// - Line 86: cannot convert directly from uint256 --> address
// - Line 226: cannot rely on wrapping arithmetic, must explicitly catch underflow/overflow with an unchecked{...}
// statement
// More details on Solidity v0.8.0 breaking changes here:
// https://docs.soliditylang.org/en/v0.8.4/080-breaking-changes.html#new-restrictions
pragma solidity ^0.8.0;
library RLPReader {
uint8 constant STRING_SHORT_START = 0x80;
uint8 constant STRING_LONG_START = 0xb8;
uint8 constant LIST_SHORT_START = 0xc0;
uint8 constant LIST_LONG_START = 0xf8;
uint8 constant WORD_SIZE = 32;
struct RLPItem {
uint256 len;
uint256 memPtr;
}
/*
* @param item RLP encoded bytes
*/
function toRlpItem(bytes memory item) internal pure returns (RLPItem memory) {
require(item.length > 0, "RLPReader: INVALID_BYTES_LENGTH");
uint256 memPtr;
assembly {
memPtr := add(item, 0x20)
}
return RLPItem(item.length, memPtr);
}
/*
* @param item RLP encoded list in bytes
*/
function toList(RLPItem memory item) internal pure returns (RLPItem[] memory) {
require(isList(item), "RLPReader: ITEM_NOT_LIST");
uint256 items = numItems(item);
RLPItem[] memory result = new RLPItem[](items);
uint256 listLength = _itemLength(item.memPtr);
require(listLength == item.len, "RLPReader: LIST_DECODED_LENGTH_MISMATCH");
uint256 memPtr = item.memPtr + _payloadOffset(item.memPtr);
uint256 dataLen;
for (uint256 i = 0; i < items; i++) {
dataLen = _itemLength(memPtr);
result[i] = RLPItem(dataLen, memPtr);
memPtr = memPtr + dataLen;
}
return result;
}
// @return indicator whether encoded payload is a list. negate this function call for isData.
function isList(RLPItem memory item) internal pure returns (bool) {
uint8 byte0;
uint256 memPtr = item.memPtr;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < LIST_SHORT_START) return false;
return true;
}
/** RLPItem conversions into data types **/
// @returns raw rlp encoding in bytes
function toRlpBytes(RLPItem memory item) internal pure returns (bytes memory) {
bytes memory result = new bytes(item.len);
uint256 ptr;
assembly {
ptr := add(0x20, result)
}
copy(item.memPtr, ptr, item.len);
return result;
}
function toAddress(RLPItem memory item) internal pure returns (address) {
require(!isList(item), "RLPReader: DECODING_LIST_AS_ADDRESS");
// 1 byte for the length prefix
require(item.len == 21, "RLPReader: INVALID_ADDRESS_LENGTH");
return address(uint160(toUint(item)));
}
function toUint(RLPItem memory item) internal pure returns (uint256) {
require(!isList(item), "RLPReader: DECODING_LIST_AS_UINT");
require(item.len <= 33, "RLPReader: INVALID_UINT_LENGTH");
uint256 itemLength = _itemLength(item.memPtr);
require(itemLength == item.len, "RLPReader: UINT_DECODED_LENGTH_MISMATCH");
uint256 offset = _payloadOffset(item.memPtr);
uint256 len = item.len - offset;
uint256 result;
uint256 memPtr = item.memPtr + offset;
assembly {
result := mload(memPtr)
// shfit to the correct location if neccesary
if lt(len, 32) {
result := div(result, exp(256, sub(32, len)))
}
}
return result;
}
// enforces 32 byte length
function toUintStrict(RLPItem memory item) internal pure returns (uint256) {
uint256 itemLength = _itemLength(item.memPtr);
require(itemLength == item.len, "RLPReader: UINT_STRICT_DECODED_LENGTH_MISMATCH");
// one byte prefix
require(item.len == 33, "RLPReader: INVALID_UINT_STRICT_LENGTH");
uint256 result;
uint256 memPtr = item.memPtr + 1;
assembly {
result := mload(memPtr)
}
return result;
}
function toBytes(RLPItem memory item) internal pure returns (bytes memory) {
uint256 listLength = _itemLength(item.memPtr);
require(listLength == item.len, "RLPReader: BYTES_DECODED_LENGTH_MISMATCH");
uint256 offset = _payloadOffset(item.memPtr);
uint256 len = item.len - offset; // data length
bytes memory result = new bytes(len);
uint256 destPtr;
assembly {
destPtr := add(0x20, result)
}
copy(item.memPtr + offset, destPtr, len);
return result;
}
/*
* Private Helpers
*/
// @return number of payload items inside an encoded list.
function numItems(RLPItem memory item) private pure returns (uint256) {
// add `isList` check if `item` is expected to be passsed without a check from calling function
// require(isList(item), "RLPReader: NUM_ITEMS_NOT_LIST");
uint256 count = 0;
uint256 currPtr = item.memPtr + _payloadOffset(item.memPtr);
uint256 endPtr = item.memPtr + item.len;
while (currPtr < endPtr) {
currPtr = currPtr + _itemLength(currPtr); // skip over an item
require(currPtr <= endPtr, "RLPReader: NUM_ITEMS_DECODED_LENGTH_MISMATCH");
count++;
}
return count;
}
// @return entire rlp item byte length
function _itemLength(uint256 memPtr) private pure returns (uint256) {
uint256 itemLen;
uint256 byte0;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < STRING_SHORT_START) itemLen = 1;
else if (byte0 < STRING_LONG_START) itemLen = byte0 - STRING_SHORT_START + 1;
else if (byte0 < LIST_SHORT_START) {
assembly {
let byteLen := sub(byte0, 0xb7) // # of bytes the actual length is
memPtr := add(memPtr, 1) // skip over the first byte
/* 32 byte word size */
let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to get the len
itemLen := add(dataLen, add(byteLen, 1))
}
} else if (byte0 < LIST_LONG_START) {
itemLen = byte0 - LIST_SHORT_START + 1;
} else {
assembly {
let byteLen := sub(byte0, 0xf7)
memPtr := add(memPtr, 1)
let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to the correct length
itemLen := add(dataLen, add(byteLen, 1))
}
}
return itemLen;
}
// @return number of bytes until the data
function _payloadOffset(uint256 memPtr) private pure returns (uint256) {
uint256 byte0;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < STRING_SHORT_START) return 0;
else if (byte0 < STRING_LONG_START || (byte0 >= LIST_SHORT_START && byte0 < LIST_LONG_START)) return 1;
else if (byte0 < LIST_SHORT_START)
// being explicit
return byte0 - (STRING_LONG_START - 1) + 1;
else return byte0 - (LIST_LONG_START - 1) + 1;
}
/*
* @param src Pointer to source
* @param dest Pointer to destination
* @param len Amount of memory to copy from the source
*/
function copy(
uint256 src,
uint256 dest,
uint256 len
) private pure {
if (len == 0) return;
// copy as many word sizes as possible
for (; len >= WORD_SIZE; len -= WORD_SIZE) {
assembly {
mstore(dest, mload(src))
}
src += WORD_SIZE;
dest += WORD_SIZE;
}
unchecked {
// left over bytes. Mask is used to remove unwanted bytes from the word
uint256 mask = 256**(WORD_SIZE - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask)) // zero out src
let destpart := and(mload(dest), mask) // retrieve the bytes
mstore(dest, or(destpart, srcpart))
}
}
}
}
// File contracts/external/polygon/lib/MerklePatriciaProof.sol
// Copied with no modifications from Polygon demo FxTunnel repo: https://github.com/jdkanani/fx-portal
// except bumping version from 0.7.3 --> 0.8
pragma solidity ^0.8.0;
library MerklePatriciaProof {
/*
* @dev Verifies a merkle patricia proof.
* @param value The terminating value in the trie.
* @param encodedPath The path in the trie leading to value.
* @param rlpParentNodes The rlp encoded stack of nodes.
* @param root The root hash of the trie.
* @return The boolean validity of the proof.
*/
function verify(
bytes memory value,
bytes memory encodedPath,
bytes memory rlpParentNodes,
bytes32 root
) internal pure returns (bool) {
RLPReader.RLPItem memory item = RLPReader.toRlpItem(rlpParentNodes);
RLPReader.RLPItem[] memory parentNodes = RLPReader.toList(item);
bytes memory currentNode;
RLPReader.RLPItem[] memory currentNodeList;
bytes32 nodeKey = root;
uint256 pathPtr = 0;
bytes memory path = _getNibbleArray(encodedPath);
if (path.length == 0) {
return false;
}
for (uint256 i = 0; i < parentNodes.length; i++) {
if (pathPtr > path.length) {
return false;
}
currentNode = RLPReader.toRlpBytes(parentNodes[i]);
if (nodeKey != keccak256(currentNode)) {
return false;
}
currentNodeList = RLPReader.toList(parentNodes[i]);
if (currentNodeList.length == 17) {
if (pathPtr == path.length) {
if (keccak256(RLPReader.toBytes(currentNodeList[16])) == keccak256(value)) {
return true;
} else {
return false;
}
}
uint8 nextPathNibble = uint8(path[pathPtr]);
if (nextPathNibble > 16) {
return false;
}
nodeKey = bytes32(RLPReader.toUintStrict(currentNodeList[nextPathNibble]));
pathPtr += 1;
} else if (currentNodeList.length == 2) {
uint256 traversed = _nibblesToTraverse(RLPReader.toBytes(currentNodeList[0]), path, pathPtr);
if (pathPtr + traversed == path.length) {
//leaf node
if (keccak256(RLPReader.toBytes(currentNodeList[1])) == keccak256(value)) {
return true;
} else {
return false;
}
}
//extension node
if (traversed == 0) {
return false;
}
pathPtr += traversed;
nodeKey = bytes32(RLPReader.toUintStrict(currentNodeList[1]));
} else {
return false;
}
}
}
function _nibblesToTraverse(
bytes memory encodedPartialPath,
bytes memory path,
uint256 pathPtr
) private pure returns (uint256) {
uint256 len = 0;
// encodedPartialPath has elements that are each two hex characters (1 byte), but partialPath
// and slicedPath have elements that are each one hex character (1 nibble)
bytes memory partialPath = _getNibbleArray(encodedPartialPath);
bytes memory slicedPath = new bytes(partialPath.length);
// pathPtr counts nibbles in path
// partialPath.length is a number of nibbles
for (uint256 i = pathPtr; i < pathPtr + partialPath.length; i++) {
bytes1 pathNibble = path[i];
slicedPath[i - pathPtr] = pathNibble;
}
if (keccak256(partialPath) == keccak256(slicedPath)) {
len = partialPath.length;
} else {
len = 0;
}
return len;
}
// bytes b must be hp encoded
function _getNibbleArray(bytes memory b) internal pure returns (bytes memory) {
bytes memory nibbles = "";
if (b.length > 0) {
uint8 offset;
uint8 hpNibble = uint8(_getNthNibbleOfBytes(0, b));
if (hpNibble == 1 || hpNibble == 3) {
nibbles = new bytes(b.length * 2 - 1);
bytes1 oddNibble = _getNthNibbleOfBytes(1, b);
nibbles[0] = oddNibble;
offset = 1;
} else {
nibbles = new bytes(b.length * 2 - 2);
offset = 0;
}
for (uint256 i = offset; i < nibbles.length; i++) {
nibbles[i] = _getNthNibbleOfBytes(i - offset + 2, b);
}
}
return nibbles;
}
function _getNthNibbleOfBytes(uint256 n, bytes memory str) private pure returns (bytes1) {
return bytes1(n % 2 == 0 ? uint8(str[n / 2]) / 0x10 : uint8(str[n / 2]) % 0x10);
}
}
// File contracts/external/polygon/lib/Merkle.sol
// Copied with no modifications from Polygon demo FxTunnel repo: https://github.com/jdkanani/fx-portal
// except bumping version from 0.7.3 --> 0.8
pragma solidity ^0.8.0;
library Merkle {
function checkMembership(
bytes32 leaf,
uint256 index,
bytes32 rootHash,
bytes memory proof
) internal pure returns (bool) {
require(proof.length % 32 == 0, "Invalid proof length");
uint256 proofHeight = proof.length / 32;
// Proof of size n means, height of the tree is n+1.
// In a tree of height n+1, max #leafs possible is 2 ^ n
require(index < 2**proofHeight, "Leaf index is too big");
bytes32 proofElement;
bytes32 computedHash = leaf;
for (uint256 i = 32; i <= proof.length; i += 32) {
assembly {
proofElement := mload(add(proof, i))
}
if (index % 2 == 0) {
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
index = index / 2;
}
return computedHash == rootHash;
}
}
// File contracts/external/polygon/tunnel/FxBaseRootTunnel.sol
// Copied with no modifications from Polygon demo FxTunnel repo: https://github.com/jdkanani/fx-portal
// except bumping version from 0.7.3 --> 0.8
pragma solidity ^0.8.0;
interface IFxStateSender {
function sendMessageToChild(address _receiver, bytes calldata _data) external;
}
contract ICheckpointManager {
struct HeaderBlock {
bytes32 root;
uint256 start;
uint256 end;
uint256 createdAt;
address proposer;
}
/**
* @notice mapping of checkpoint header numbers to block details
* @dev These checkpoints are submited by plasma contracts
*/
mapping(uint256 => HeaderBlock) public headerBlocks;
}
abstract contract FxBaseRootTunnel {
using RLPReader for bytes;
using RLPReader for RLPReader.RLPItem;
using Merkle for bytes32;
// keccak256(MessageSent(bytes))
bytes32 public constant SEND_MESSAGE_EVENT_SIG = 0x8c5261668696ce22758910d05bab8f186d6eb247ceac2af2e82c7dc17669b036;
// state sender contract
IFxStateSender public fxRoot;
// root chain manager
ICheckpointManager public checkpointManager;
// child tunnel contract which receives and sends messages
address public fxChildTunnel;
// storage to avoid duplicate exits
mapping(bytes32 => bool) public processedExits;
constructor(address _checkpointManager, address _fxRoot) {
checkpointManager = ICheckpointManager(_checkpointManager);
fxRoot = IFxStateSender(_fxRoot);
}
// set fxChildTunnel if not set already
function setFxChildTunnel(address _fxChildTunnel) public {
require(fxChildTunnel == address(0x0), "FxBaseRootTunnel: CHILD_TUNNEL_ALREADY_SET");
fxChildTunnel = _fxChildTunnel;
}
/**
* @notice Send bytes message to Child Tunnel
* @param message bytes message that will be sent to Child Tunnel
* some message examples -
* abi.encode(tokenId);
* abi.encode(tokenId, tokenMetadata);
* abi.encode(messageType, messageData);
*/
function _sendMessageToChild(bytes memory message) internal {
fxRoot.sendMessageToChild(fxChildTunnel, message);
}
function _validateAndExtractMessage(bytes memory inputData) internal returns (bytes memory) {
RLPReader.RLPItem[] memory inputDataRLPList = inputData.toRlpItem().toList();
// checking if exit has already been processed
// unique exit is identified using hash of (blockNumber, branchMask, receiptLogIndex)
bytes32 exitHash =
keccak256(
abi.encodePacked(
inputDataRLPList[2].toUint(), // blockNumber
// first 2 nibbles are dropped while generating nibble array
// this allows branch masks that are valid but bypass exitHash check (changing first 2 nibbles only)
// so converting to nibble array and then hashing it
MerklePatriciaProof._getNibbleArray(inputDataRLPList[8].toBytes()), // branchMask
inputDataRLPList[9].toUint() // receiptLogIndex
)
);
require(processedExits[exitHash] == false, "FxRootTunnel: EXIT_ALREADY_PROCESSED");
processedExits[exitHash] = true;
RLPReader.RLPItem[] memory receiptRLPList = inputDataRLPList[6].toBytes().toRlpItem().toList();
RLPReader.RLPItem memory logRLP =
receiptRLPList[3].toList()[
inputDataRLPList[9].toUint() // receiptLogIndex
];
RLPReader.RLPItem[] memory logRLPList = logRLP.toList();
// check child tunnel
require(fxChildTunnel == RLPReader.toAddress(logRLPList[0]), "FxRootTunnel: INVALID_FX_CHILD_TUNNEL");
// verify receipt inclusion
require(
MerklePatriciaProof.verify(
inputDataRLPList[6].toBytes(), // receipt
inputDataRLPList[8].toBytes(), // branchMask
inputDataRLPList[7].toBytes(), // receiptProof
bytes32(inputDataRLPList[5].toUint()) // receiptRoot
),
"FxRootTunnel: INVALID_RECEIPT_PROOF"
);
// verify checkpoint inclusion
_checkBlockMembershipInCheckpoint(
inputDataRLPList[2].toUint(), // blockNumber
inputDataRLPList[3].toUint(), // blockTime
bytes32(inputDataRLPList[4].toUint()), // txRoot
bytes32(inputDataRLPList[5].toUint()), // receiptRoot
inputDataRLPList[0].toUint(), // headerNumber
inputDataRLPList[1].toBytes() // blockProof
);
RLPReader.RLPItem[] memory logTopicRLPList = logRLPList[1].toList(); // topics
require(
bytes32(logTopicRLPList[0].toUint()) == SEND_MESSAGE_EVENT_SIG, // topic0 is event sig
"FxRootTunnel: INVALID_SIGNATURE"
);
// received message data
bytes memory receivedData = logRLPList[2].toBytes();
bytes memory message = abi.decode(receivedData, (bytes)); // event decodes params again, so decoding bytes to get message
return message;
}
function _checkBlockMembershipInCheckpoint(
uint256 blockNumber,
uint256 blockTime,
bytes32 txRoot,
bytes32 receiptRoot,
uint256 headerNumber,
bytes memory blockProof
) private view returns (uint256) {
(bytes32 headerRoot, uint256 startBlock, , uint256 createdAt, ) = checkpointManager.headerBlocks(headerNumber);
require(
keccak256(abi.encodePacked(blockNumber, blockTime, txRoot, receiptRoot)).checkMembership(
blockNumber - startBlock,
headerRoot,
blockProof
),
"FxRootTunnel: INVALID_HEADER"
);
return createdAt;
}
/**
* @notice receive message from L2 to L1, validated by proof
* @dev This function verifies if the transaction actually happened on child chain
*
* @param inputData RLP encoded data of the reference tx containing following list of fields
* 0 - headerNumber - Checkpoint header block number containing the reference tx
* 1 - blockProof - Proof that the block header (in the child chain) is a leaf in the submitted merkle root
* 2 - blockNumber - Block number containing the reference tx on child chain
* 3 - blockTime - Reference tx block time
* 4 - txRoot - Transactions root of block
* 5 - receiptRoot - Receipts root of block
* 6 - receipt - Receipt of the reference transaction
* 7 - receiptProof - Merkle proof of the reference receipt
* 8 - branchMask - 32 bits denoting the path of receipt in merkle tree
* 9 - receiptLogIndex - Log Index to read from the receipt
*/
function receiveMessage(bytes memory inputData) public virtual {
bytes memory message = _validateAndExtractMessage(inputData);
_processMessageFromChild(message);
}
/**
* @notice Process message received from Child Tunnel
* @dev function needs to be implemented to handle message as per requirement
* This is called by onStateReceive function.
* Since it is called via a system call, any event will not be emitted during its execution.
* @param message bytes message that was sent from Child Tunnel
*/
function _processMessageFromChild(bytes memory message) internal virtual;
}
// File contracts/oracle/interfaces/FinderInterface.sol
pragma solidity ^0.8.0;
/**
* @title Provides addresses of the live contracts implementing certain interfaces.
* @dev Examples are the Oracle or Store interfaces.
*/
interface FinderInterface {
/**
* @notice Updates the address of the contract that implements `interfaceName`.
* @param interfaceName bytes32 encoding of the interface name that is either changed or registered.
* @param implementationAddress address of the deployed contract that implements the interface.
*/
function changeImplementationAddress(bytes32 interfaceName, address implementationAddress) external;
/**
* @notice Gets the address of the contract that implements the given `interfaceName`.
* @param interfaceName queried interface.
* @return implementationAddress address of the deployed contract that implements the interface.
*/
function getImplementationAddress(bytes32 interfaceName) external view returns (address);
}
// File contracts/oracle/implementation/Constants.sol
pragma solidity ^0.8.0;
/**
* @title Stores common interface names used throughout the DVM by registration in the Finder.
*/
library OracleInterfaces {
bytes32 public constant Oracle = "Oracle";
bytes32 public constant IdentifierWhitelist = "IdentifierWhitelist";
bytes32 public constant Store = "Store";
bytes32 public constant FinancialContractsAdmin = "FinancialContractsAdmin";
bytes32 public constant Registry = "Registry";
bytes32 public constant CollateralWhitelist = "CollateralWhitelist";
bytes32 public constant OptimisticOracle = "OptimisticOracle";
bytes32 public constant Bridge = "Bridge";
bytes32 public constant GenericHandler = "GenericHandler";
}
// File contracts/polygon/OracleBaseTunnel.sol
pragma solidity ^0.8.0;
/**
* @notice Enforces lifecycle of price requests for deriving contract.
*/
abstract contract OracleBaseTunnel {
enum RequestState { NeverRequested, Requested, Resolved }
struct Price {
RequestState state;
int256 price;
}
// This value must be <= the Voting contract's `ancillaryBytesLimit` value otherwise it is possible
// that a price can be requested to this contract successfully, but cannot be resolved by the DVM which refuses
// to accept a price request made with ancillary data length over a certain size.
uint256 public constant ancillaryBytesLimit = 8192;
// Mapping of encoded price requests {identifier, time, ancillaryData} to Price objects.
mapping(bytes32 => Price) internal prices;
// Finder to provide addresses for DVM system contracts.
FinderInterface public finder;
event PriceRequestAdded(bytes32 indexed identifier, uint256 time, bytes ancillaryData, bytes32 indexed requestHash);
event PushedPrice(
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
int256 price,
bytes32 indexed requestHash
);
/**
* @notice Constructor.
* @param _finderAddress finder to use to get addresses of DVM contracts.
*/
constructor(address _finderAddress) {
finder = FinderInterface(_finderAddress);
}
/**
* @notice Enqueues a request (if a request isn't already present) for the given (identifier, time,
* ancillary data) combination. Will only emit an event if the request has never been requested.
*/
function _requestPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) internal {
require(ancillaryData.length <= ancillaryBytesLimit, "Invalid ancillary data");
bytes32 priceRequestId = _encodePriceRequest(identifier, time, ancillaryData);
Price storage lookup = prices[priceRequestId];
if (lookup.state == RequestState.NeverRequested) {
lookup.state = RequestState.Requested;
emit PriceRequestAdded(identifier, time, ancillaryData, priceRequestId);
}
}
/**
* @notice Publishes price for a requested query. Will only emit an event if the request has never been resolved.
*/
function _publishPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
int256 price
) internal {
bytes32 priceRequestId = _encodePriceRequest(identifier, time, ancillaryData);
Price storage lookup = prices[priceRequestId];
if (lookup.state == RequestState.Requested) {
lookup.price = price;
lookup.state = RequestState.Resolved;
emit PushedPrice(identifier, time, ancillaryData, lookup.price, priceRequestId);
}
}
/**
* @notice Returns the convenient way to store price requests, uniquely identified by {identifier, time,
* ancillaryData }.
*/
function _encodePriceRequest(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) internal pure returns (bytes32) {
return keccak256(abi.encode(identifier, time, ancillaryData));
}
}
// File contracts/oracle/interfaces/OracleAncillaryInterface.sol
pragma solidity ^0.8.0;
/**
* @title Financial contract facing Oracle interface.
* @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
*/
abstract contract OracleAncillaryInterface {
/**
* @notice Enqueues a request (if a request isn't already present) for the given `identifier`, `time` pair.
* @dev Time must be in the past and the identifier must be supported.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @param time unix timestamp for the price request.
*/
function requestPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public virtual;
/**
* @notice Whether the price for `identifier` and `time` is available.
* @dev Time must be in the past and the identifier must be supported.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @return bool if the DVM has resolved to a price for the given identifier and timestamp.
*/
function hasPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view virtual returns (bool);
/**
* @notice Gets the price for `identifier` and `time` if it has already been requested and resolved.
* @dev If the price is not available, the method reverts.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @return int256 representing the resolved price for the given identifier and timestamp.
*/
function getPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view virtual returns (int256);
}
// File contracts/common/implementation/Lockable.sol
pragma solidity ^0.8.0;
/**
* @title A contract that provides modifiers to prevent reentrancy to state-changing and view-only methods. This contract
* is inspired by https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol
* and https://github.com/balancer-labs/balancer-core/blob/master/contracts/BPool.sol.
*/
contract Lockable {
bool private _notEntered;
constructor() {
// Storing an initial non-zero value makes deployment a bit more expensive, but in exchange the refund on every
// call to nonReentrant will be lower in amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to increase the likelihood of the full
// refund coming into effect.
_notEntered = true;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant` function is not supported. It is possible to
* prevent this from happening by making the `nonReentrant` function external, and making it call a `private`
* function that does the actual state modification.
*/
modifier nonReentrant() {
_preEntranceCheck();
_preEntranceSet();
_;
_postEntranceReset();
}
/**
* @dev Designed to prevent a view-only method from being re-entered during a call to a `nonReentrant()` state-changing method.
*/
modifier nonReentrantView() {
_preEntranceCheck();
_;
}
// Internal methods are used to avoid copying the require statement's bytecode to every `nonReentrant()` method.
// On entry into a function, `_preEntranceCheck()` should always be called to check if the function is being
// re-entered. Then, if the function modifies state, it should call `_postEntranceSet()`, perform its logic, and
// then call `_postEntranceReset()`.
// View-only methods can simply call `_preEntranceCheck()` to make sure that it is not being re-entered.
function _preEntranceCheck() internal view {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
}
function _preEntranceSet() internal {
// Any calls to nonReentrant after this point will fail
_notEntered = false;
}
function _postEntranceReset() internal {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
}
// File contracts/polygon/OracleRootTunnel.sol
pragma solidity ^0.8.0;
/**
* @title Adapter deployed on mainnet that validates and sends price requests from sidechain to the DVM on mainnet.
* @dev This contract must be a registered financial contract in order to make DVM price requests.
*/
contract OracleRootTunnel is OracleBaseTunnel, FxBaseRootTunnel, Lockable {
constructor(
address _checkpointManager,
address _fxRoot,
address _finderAddress
) OracleBaseTunnel(_finderAddress) FxBaseRootTunnel(_checkpointManager, _fxRoot) {}
/**
* @notice This is the first method that should be called in order to publish a price request to the sidechain.
* @dev Publishes the DVM resolved price for the price request, or reverts if not resolved yet. This contract must
* be registered with the DVM to query price requests.
* @param identifier Identifier of price request to resolve.
* @param time Timestamp of price request to resolve.
* @param ancillaryData extra data of price request to resolve.
*/
function publishPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public nonReentrant() {
// `getPrice` will revert if there is no price.
int256 price = _getOracle().getPrice(identifier, time, ancillaryData);
// This implementation allows duplicate MessageSent events via _sendMessageToRoot. The child tunnel on the
// sidechain will not have a problem handling duplicate price resolutions (it will just ignore them). This is
// potentially a fallback in case the automatic state sync to the sidechain is missing the `publishPrice`
// transaction for some reason. There is little risk in duplicating MessageSent emissions because the sidechain
// bridge does not impose any rate-limiting.
_publishPrice(identifier, time, ancillaryData, price);
_sendMessageToChild(abi.encode(identifier, time, ancillaryData, price));
}
/**
* @notice Submits a price request.
* @dev This internal method will be called inside `receiveMessage(bytes memory inputData)`. The `inputData` is a
* proof of transaction that is derived from the transaction hash of the transaction on the child chain that
* originated the cross-chain price request via _sendMessageToRoot. This contract must be registered with the DVM
* to submit price requests.
* @param data ABI encoded params with which to call `requestPrice`.
*/
function _processMessageFromChild(bytes memory data) internal override {
(bytes32 identifier, uint256 time, bytes memory ancillaryData) = abi.decode(data, (bytes32, uint256, bytes));
_requestPrice(identifier, time, ancillaryData);
_getOracle().requestPrice(identifier, time, ancillaryData);
}
/**
* @notice Return DVM for this network.
*/
function _getOracle() internal view returns (OracleAncillaryInterface) {
return OracleAncillaryInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
}
|
* @title Adapter deployed on mainnet that validates and sends price requests from sidechain to the DVM on mainnet. @dev This contract must be a registered financial contract in order to make DVM price requests./
|
contract OracleRootTunnel is OracleBaseTunnel, FxBaseRootTunnel, Lockable {
constructor(
address _checkpointManager,
address _fxRoot,
address _finderAddress
function publishPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) OracleBaseTunnel(_finderAddress) FxBaseRootTunnel(_checkpointManager, _fxRoot) {}
) public nonReentrant() {
int256 price = _getOracle().getPrice(identifier, time, ancillaryData);
_publishPrice(identifier, time, ancillaryData, price);
_sendMessageToChild(abi.encode(identifier, time, ancillaryData, price));
}
function _processMessageFromChild(bytes memory data) internal override {
(bytes32 identifier, uint256 time, bytes memory ancillaryData) = abi.decode(data, (bytes32, uint256, bytes));
_requestPrice(identifier, time, ancillaryData);
_getOracle().requestPrice(identifier, time, ancillaryData);
}
function _getOracle() internal view returns (OracleAncillaryInterface) {
return OracleAncillaryInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
}
| 2,026,088
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./partial_match/1/0xBCF85224fc0756B9Fa45aA7892530B47e10b6433/sources/src/v0.8/dev/OptimismSequencerUptimeFeed.sol
|
* @notice Helper function to update when a round was last updated @param roundId The round ID to update @param status Sequencer status/
|
function updateRound(uint80 roundId, bool status) private {
uint64 updatedAt = uint64(block.timestamp);
s_rounds[roundId].updatedAt = updatedAt;
s_feedState.updatedAt = updatedAt;
emit RoundUpdated(getStatusAnswer(status), updatedAt);
}
| 4,175,997
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./full_match/80001/0xCF65E807111c2CC4FCA69818107E3f8DCD570F70/sources/lib/contracts/contracts/smart-wallet/utils/BaseAccountFactory.sol
|
//*/ @notice Returns the address of an Account that would be deployed with the given admin signer.
|
View functions
function getAddress(address _adminSigner) public view returns (address) {
bytes32 salt = keccak256(abi.encode(_adminSigner));
return Clones.predictDeterministicAddress(accountImplementation, salt);
}
| 847,494
|
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./full_match/5/0x61b3E0fcEF001A8bcBd216c72bd78902ef8EA325/sources/project_/contracts/lib/env/Structs.sol
|
Check {Reward} type
|
Reward reward;
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./full_match/42161/0x26EFF6c28EB96330BE02d1C2CA1fF68Ae3b4bC08/sources/project_/contracts/Darwin1155.sol
|
* @return The Address of the implementation./
|
function implementation() public override virtual view returns (address){
return _implementation;
}
| 16,305,661
|
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// File: @openzeppelin/contracts/math/Math.sol
//
pragma solidity ^0.6.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
//
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
//
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/utils/Address.sol
//
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
//
pragma solidity ^0.6.0;
/**
* @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: @openzeppelin/contracts/GSN/Context.sol
//
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
//
pragma solidity ^0.6.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/interfaces/IRewardDistributionRecipient.sol
pragma solidity ^0.6.0;
abstract contract IRewardDistributionRecipient is Ownable {
address public rewardDistribution;
function notifyRewardAmount(uint256 reward) external virtual;
modifier onlyRewardDistribution() {
require(
_msgSender() == rewardDistribution,
'Caller is not reward distribution'
);
_;
}
function setRewardDistribution(address _rewardDistribution)
external
virtual
onlyOwner
{
rewardDistribution = _rewardDistribution;
}
}
// File: contracts/distribution/BACUSDTPool.sol
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* 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
*/
// File: @openzeppelin/contracts/math/Math.sol
// File: @openzeppelin/contracts/math/SafeMath.sol
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// File: @openzeppelin/contracts/utils/Address.sol
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
// File: contracts/IRewardDistributionRecipient.sol
contract USDTWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public usdt;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
usdt.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
usdt.safeTransfer(msg.sender, amount);
}
}
contract BACUSDTPool is USDTWrapper, IRewardDistributionRecipient {
IERC20 public basisCash;
uint256 public DURATION = 5 days;
uint256 public starttime;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => uint256) public deposits;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisCash_,
address usdt_,
uint256 starttime_
) public {
basisCash = IERC20(basisCash_);
usdt = IERC20(usdt_);
starttime = starttime_;
}
modifier checkStart() {
require(block.timestamp >= starttime, 'BACUSDTPool: not start');
_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACUSDTPool: Cannot stake 0');
uint256 newDeposit = deposits[msg.sender].add(amount);
require(
newDeposit <= 20000e6,
'BACUSDTPool: deposit amount exceeds maximum 20000'
);
deposits[msg.sender] = newDeposit;
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACUSDTPool: Cannot withdraw 0');
deposits[msg.sender] = deposits[msg.sender].sub(amount);
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisCash.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = reward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
|
stake visibility is public as overriding LPTokenWrapper's stake() function
|
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACUSDTPool: Cannot stake 0');
uint256 newDeposit = deposits[msg.sender].add(amount);
require(
newDeposit <= 20000e6,
'BACUSDTPool: deposit amount exceeds maximum 20000'
);
deposits[msg.sender] = newDeposit;
super.stake(amount);
emit Staked(msg.sender, amount);
}
| 5,976,903
|
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EnumerableSet.AddressSet private _blacklist;
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// SPDX-License-Identifier: GPL-3.0
/// @title The Nouns NFT descriptor
/*********************************
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░██░░░████░░██░░░████░░░ *
* ░░██████░░░████████░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
*********************************/
pragma solidity ^0.8.6;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";
import {ILilNounsDescriptor} from "./interfaces/ILilNounsDescriptor.sol";
import {INounsSeeder} from "./interfaces/INounsSeeder.sol";
import {NFTDescriptor} from "./libs/NFTDescriptor.sol";
import {MultiPartRLEToSVG} from "./libs/MultiPartRLEToSVG.sol";
contract LilNounsDescriptor is ILilNounsDescriptor, Ownable {
using Strings for uint256;
// prettier-ignore
// https://creativecommons.org/publicdomain/zero/1.0/legalcode.txt
// bytes32 constant COPYRIGHT_CC0_1_0_UNIVERSAL_LICENSE = 0xa2010f343487d3f7618affe54f789f5487602331c0a8d03f49e9a7c547cf0499;
// Whether or not new Noun parts can be added
bool public override arePartsLocked;
// Whether or not `tokenURI` should be returned as a data URI (Default: true)
bool public override isDataURIEnabled = true;
// Base URI
string public override baseURI;
// Noun Color Palettes (Index => Hex Colors)
mapping(uint8 => string[]) public override palettes;
// Noun Backgrounds (Hex Colors)
string[] public override backgrounds;
// Noun Bodies (Custom RLE)
bytes[] public override bodies;
// Noun Accessories (Custom RLE)
bytes[] public override accessories;
// Noun Heads (Custom RLE)
bytes[] public override heads;
// Noun Glasses (Custom RLE)
bytes[] public override glasses;
/**
* @notice Require that the parts have not been locked.
*/
modifier whenPartsNotLocked() {
require(!arePartsLocked, "Parts are locked");
_;
}
/**
* @notice Get the number of available Noun `backgrounds`.
*/
function backgroundCount() external view override returns (uint256) {
return backgrounds.length;
}
/**
* @notice Get the number of available Noun `bodies`.
*/
function bodyCount() external view override returns (uint256) {
return bodies.length;
}
/**
* @notice Get the number of available Noun `accessories`.
*/
function accessoryCount() external view override returns (uint256) {
return accessories.length;
}
/**
* @notice Get the number of available Noun `heads`.
*/
function headCount() external view override returns (uint256) {
return heads.length;
}
/**
* @notice Get the number of available Noun `glasses`.
*/
function glassesCount() external view override returns (uint256) {
return glasses.length;
}
/**
* @notice Add colors to a color palette.
* @dev This function can only be called by the owner.
*/
function addManyColorsToPalette(
uint8 paletteIndex,
string[] calldata newColors
) external override onlyOwner {
require(
palettes[paletteIndex].length + newColors.length <= 288,
"Palettes can only hold 288 colors"
);
for (uint256 i = 0; i < newColors.length; i++) {
_addColorToPalette(paletteIndex, newColors[i]);
}
}
/**
* @notice Batch add Noun backgrounds.
* @dev This function can only be called by the owner when not locked.
*/
function addManyBackgrounds(string[] calldata _backgrounds)
external
override
onlyOwner
whenPartsNotLocked
{
for (uint256 i = 0; i < _backgrounds.length; i++) {
_addBackground(_backgrounds[i]);
}
}
/**
* @notice Batch add Noun bodies.
* @dev This function can only be called by the owner when not locked.
*/
function addManyBodies(bytes[] calldata _bodies)
external
override
onlyOwner
whenPartsNotLocked
{
for (uint256 i = 0; i < _bodies.length; i++) {
_addBody(_bodies[i]);
}
}
/**
* @notice Batch add Noun accessories.
* @dev This function can only be called by the owner when not locked.
*/
function addManyAccessories(bytes[] calldata _accessories)
external
override
onlyOwner
whenPartsNotLocked
{
for (uint256 i = 0; i < _accessories.length; i++) {
_addAccessory(_accessories[i]);
}
}
/**
* @notice Batch add Noun heads.
* @dev This function can only be called by the owner when not locked.
*/
function addManyHeads(bytes[] calldata _heads)
external
override
onlyOwner
whenPartsNotLocked
{
for (uint256 i = 0; i < _heads.length; i++) {
_addHead(_heads[i]);
}
}
/**
* @notice Batch add Noun glasses.
* @dev This function can only be called by the owner when not locked.
*/
function addManyGlasses(bytes[] calldata _glasses)
external
override
onlyOwner
whenPartsNotLocked
{
for (uint256 i = 0; i < _glasses.length; i++) {
_addGlasses(_glasses[i]);
}
}
/**
* @notice Add a single color to a color palette.
* @dev This function can only be called by the owner.
*/
function addColorToPalette(uint8 _paletteIndex, string calldata _color)
external
override
onlyOwner
{
require(
palettes[_paletteIndex].length <= 287,
"Palettes can only hold 288 colors"
);
_addColorToPalette(_paletteIndex, _color);
}
/**
* @notice Add a Noun background.
* @dev This function can only be called by the owner when not locked.
*/
function addBackground(string calldata _background)
external
override
onlyOwner
whenPartsNotLocked
{
_addBackground(_background);
}
/**
* @notice Add a Noun body.
* @dev This function can only be called by the owner when not locked.
*/
function addBody(bytes calldata _body)
external
override
onlyOwner
whenPartsNotLocked
{
_addBody(_body);
}
/**
* @notice Add a Noun accessory.
* @dev This function can only be called by the owner when not locked.
*/
function addAccessory(bytes calldata _accessory)
external
override
onlyOwner
whenPartsNotLocked
{
_addAccessory(_accessory);
}
/**
* @notice Add a Noun head.
* @dev This function can only be called by the owner when not locked.
*/
function addHead(bytes calldata _head)
external
override
onlyOwner
whenPartsNotLocked
{
_addHead(_head);
}
/**
* @notice Add Noun glasses.
* @dev This function can only be called by the owner when not locked.
*/
function addGlasses(bytes calldata _glasses)
external
override
onlyOwner
whenPartsNotLocked
{
_addGlasses(_glasses);
}
/**
* @notice Lock all Noun parts.
* @dev This cannot be reversed and can only be called by the owner when not locked.
*/
function lockParts() external override onlyOwner whenPartsNotLocked {
arePartsLocked = true;
emit PartsLocked();
}
/**
* @notice Toggle a boolean value which determines if `tokenURI` returns a data URI
* or an HTTP URL.
* @dev This can only be called by the owner.
*/
function toggleDataURIEnabled() external override onlyOwner {
bool enabled = !isDataURIEnabled;
isDataURIEnabled = enabled;
emit DataURIToggled(enabled);
}
/**
* @notice 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.
* @dev This can only be called by the owner.
*/
function setBaseURI(string calldata _baseURI) external override onlyOwner {
baseURI = _baseURI;
emit BaseURIUpdated(_baseURI);
}
/**
* @notice Given a token ID and seed, construct a token URI for an official Nouns DAO noun.
* @dev The returned value may be a base64 encoded data URI or an API URL.
*/
function tokenURI(uint256 tokenId, INounsSeeder.Seed memory seed)
external
view
override
returns (string memory)
{
if (isDataURIEnabled) {
return dataURI(tokenId, seed);
}
return string(abi.encodePacked(baseURI, tokenId.toString()));
}
/**
* @notice Given a token ID and seed, construct a base64 encoded data URI for an official Nouns DAO noun.
*/
function dataURI(uint256 tokenId, INounsSeeder.Seed memory seed)
public
view
override
returns (string memory)
{
string memory nounId = tokenId.toString();
string memory name = string(abi.encodePacked("Noun ", nounId));
string memory description = string(
abi.encodePacked("Noun ", nounId, " is a member of the Nouns DAO")
);
return genericDataURI(name, description, seed);
}
/**
* @notice Given a name, description, and seed, construct a base64 encoded data URI.
*/
function genericDataURI(
string memory name,
string memory description,
INounsSeeder.Seed memory seed
) public view override returns (string memory) {
NFTDescriptor.TokenURIParams memory params = NFTDescriptor
.TokenURIParams({
name: name,
description: description,
parts: _getPartsForSeed(seed),
background: backgrounds[seed.background]
});
return NFTDescriptor.constructTokenURI(params, palettes);
}
/**
* @notice Given a seed, construct a base64 encoded SVG image.
*/
function generateSVGImage(INounsSeeder.Seed memory seed)
external
view
override
returns (string memory)
{
MultiPartRLEToSVG.SVGParams memory params = MultiPartRLEToSVG
.SVGParams({
parts: _getPartsForSeed(seed),
background: backgrounds[seed.background]
});
return NFTDescriptor.generateSVGImage(params, palettes);
}
/**
* @notice Add a single color to a color palette.
*/
function _addColorToPalette(uint8 _paletteIndex, string calldata _color)
internal
{
palettes[_paletteIndex].push(_color);
}
/**
* @notice Add a Noun background.
*/
function _addBackground(string calldata _background) internal {
backgrounds.push(_background);
}
/**
* @notice Add a Noun body.
*/
function _addBody(bytes calldata _body) internal {
bodies.push(_body);
}
/**
* @notice Add a Noun accessory.
*/
function _addAccessory(bytes calldata _accessory) internal {
accessories.push(_accessory);
}
/**
* @notice Add a Noun head.
*/
function _addHead(bytes calldata _head) internal {
heads.push(_head);
}
/**
* @notice Add Noun glasses.
*/
function _addGlasses(bytes calldata _glasses) internal {
glasses.push(_glasses);
}
/**
* @notice Get all Noun parts for the passed `seed`.
*/
function _getPartsForSeed(INounsSeeder.Seed memory seed)
internal
view
returns (bytes[] memory)
{
bytes[] memory _parts = new bytes[](4);
_parts[0] = bodies[seed.body];
_parts[1] = accessories[seed.accessory];
_parts[2] = heads[seed.head];
_parts[3] = glasses[seed.glasses];
return _parts;
}
}
// 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 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: GPL-3.0
/// @title Interface for NounsDescriptor
/*********************************
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░██░░░████░░██░░░████░░░ *
* ░░██████░░░████████░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
*********************************/
pragma solidity ^0.8.6;
import { INounsSeeder } from "./INounsSeeder.sol";
interface ILilNounsDescriptor {
event PartsLocked();
event DataURIToggled(bool enabled);
event BaseURIUpdated(string baseURI);
function arePartsLocked() external returns (bool);
function isDataURIEnabled() external returns (bool);
function baseURI() external returns (string memory);
function palettes(uint8 paletteIndex, uint256 colorIndex) external view returns (string memory);
function backgrounds(uint256 index) external view returns (string memory);
function bodies(uint256 index) external view returns (bytes memory);
function accessories(uint256 index) external view returns (bytes memory);
function heads(uint256 index) external view returns (bytes memory);
function glasses(uint256 index) external view returns (bytes memory);
function backgroundCount() external view returns (uint256);
function bodyCount() external view returns (uint256);
function accessoryCount() external view returns (uint256);
function headCount() external view returns (uint256);
function glassesCount() external view returns (uint256);
function addManyColorsToPalette(uint8 paletteIndex, string[] calldata newColors) external;
function addManyBackgrounds(string[] calldata backgrounds) external;
function addManyBodies(bytes[] calldata bodies) external;
function addManyAccessories(bytes[] calldata accessories) external;
function addManyHeads(bytes[] calldata heads) external;
function addManyGlasses(bytes[] calldata glasses) external;
function addColorToPalette(uint8 paletteIndex, string calldata color) external;
function addBackground(string calldata background) external;
function addBody(bytes calldata body) external;
function addAccessory(bytes calldata accessory) external;
function addHead(bytes calldata head) external;
function addGlasses(bytes calldata glasses) external;
function lockParts() external;
function toggleDataURIEnabled() external;
function setBaseURI(string calldata baseURI) external;
function tokenURI(uint256 tokenId, INounsSeeder.Seed memory seed) external view returns (string memory);
function dataURI(uint256 tokenId, INounsSeeder.Seed memory seed) external view returns (string memory);
function genericDataURI(
string calldata name,
string calldata description,
INounsSeeder.Seed memory seed
) external view returns (string memory);
function generateSVGImage(INounsSeeder.Seed memory seed) external view returns (string memory);
}
//SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.6;
import {ILilNounsDescriptor} from "./ILilNounsDescriptor.sol";
interface INounsSeeder {
struct Seed {
uint48 background;
uint48 body;
uint48 accessory;
uint48 head;
uint48 glasses;
}
function generateSeed(uint256 nounId, ILilNounsDescriptor descriptor)
external
view
returns (Seed memory);
}
// SPDX-License-Identifier: GPL-3.0
/// @title A library used to construct ERC721 token URIs and SVG images
/// Copy pasta from Noun contract (thx nounders!)
/*********************************
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░██░░░████░░██░░░████░░░ *
* ░░██████░░░████████░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
*********************************/
pragma solidity ^0.8.6;
import { Base64 } from "base64-sol/base64.sol";
import { MultiPartRLEToSVG } from "./MultiPartRLEToSVG.sol";
library NFTDescriptor {
struct TokenURIParams {
string name;
string description;
bytes[] parts;
string background;
}
/**
* @notice Construct an ERC721 token URI.
*/
function constructTokenURI(TokenURIParams memory params, mapping(uint8 => string[]) storage palettes)
public
view
returns (string memory)
{
string memory image = generateSVGImage(
MultiPartRLEToSVG.SVGParams({ parts: params.parts, background: params.background }),
palettes
);
// prettier-ignore
return string(
abi.encodePacked(
'data:application/json;base64,',
Base64.encode(
bytes(
abi.encodePacked('{"name":"', params.name, '", "description":"', params.description, '", "image": "', 'data:image/svg+xml;base64,', image, '"}')
)
)
)
);
}
/**
* @notice Generate an SVG image for use in the ERC721 token URI.
*/
function generateSVGImage(MultiPartRLEToSVG.SVGParams memory params, mapping(uint8 => string[]) storage palettes)
public
view
returns (string memory svg)
{
return Base64.encode(bytes(MultiPartRLEToSVG.generateSVG(params, palettes)));
}
}
// SPDX-License-Identifier: GPL-3.0
/// @title A library used to convert multi-part RLE compressed images to SVG
/// Copy pasta from Noun contract (thx nounders!)
/*********************************
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░██░░░████░░██░░░████░░░ *
* ░░██████░░░████████░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
*********************************/
pragma solidity ^0.8.6;
library MultiPartRLEToSVG {
struct SVGParams {
bytes[] parts;
string background;
}
struct ContentBounds {
uint8 top;
uint8 right;
uint8 bottom;
uint8 left;
}
struct Rect {
uint8 length;
uint8 colorIndex;
}
struct DecodedImage {
uint8 paletteIndex;
ContentBounds bounds;
Rect[] rects;
}
/**
* @notice Given RLE image parts and color palettes, merge to generate a single SVG image.
*/
function generateSVG(SVGParams memory params, mapping(uint8 => string[]) storage palettes)
internal
view
returns (string memory svg)
{
// prettier-ignore
return string(
abi.encodePacked(
'<svg width="320" height="320" viewBox="0 0 320 320" xmlns="http://www.w3.org/2000/svg" shape-rendering="crispEdges">',
'<rect width="100%" height="100%" fill="#', params.background, '" />',
_generateSVGRects(params, palettes),
'</svg>'
)
);
}
/**
* @notice Given RLE image parts and color palettes, generate SVG rects.
*/
// prettier-ignore
function _generateSVGRects(SVGParams memory params, mapping(uint8 => string[]) storage palettes)
private
view
returns (string memory svg)
{
string[33] memory lookup = [
'0', '10', '20', '30', '40', '50', '60', '70',
'80', '90', '100', '110', '120', '130', '140', '150',
'160', '170', '180', '190', '200', '210', '220', '230',
'240', '250', '260', '270', '280', '290', '300', '310',
'320'
];
string memory rects;
for (uint8 p = 0; p < params.parts.length; p++) {
DecodedImage memory image = _decodeRLEImage(params.parts[p]);
string[] storage palette = palettes[image.paletteIndex];
uint256 currentX = image.bounds.left;
uint256 currentY = image.bounds.top;
uint256 cursor;
string[16] memory buffer;
string memory part;
for (uint256 i = 0; i < image.rects.length; i++) {
Rect memory rect = image.rects[i];
if (rect.colorIndex != 0) {
buffer[cursor] = lookup[rect.length]; // width
buffer[cursor + 1] = lookup[currentX]; // x
buffer[cursor + 2] = lookup[currentY]; // y
buffer[cursor + 3] = palette[rect.colorIndex]; // color
cursor += 4;
if (cursor >= 16) {
part = string(abi.encodePacked(part, _getChunk(cursor, buffer)));
cursor = 0;
}
}
currentX += rect.length;
if (currentX == image.bounds.right) {
currentX = image.bounds.left;
currentY++;
}
}
if (cursor != 0) {
part = string(abi.encodePacked(part, _getChunk(cursor, buffer)));
}
rects = string(abi.encodePacked(rects, part));
}
return rects;
}
/**
* @notice Return a string that consists of all rects in the provided `buffer`.
*/
// prettier-ignore
function _getChunk(uint256 cursor, string[16] memory buffer) private pure returns (string memory) {
string memory chunk;
for (uint256 i = 0; i < cursor; i += 4) {
chunk = string(
abi.encodePacked(
chunk,
'<rect width="', buffer[i], '" height="10" x="', buffer[i + 1], '" y="', buffer[i + 2], '" fill="#', buffer[i + 3], '" />'
)
);
}
return chunk;
}
/**
* @notice Decode a single RLE compressed image into a `DecodedImage`.
*/
function _decodeRLEImage(bytes memory image) private pure returns (DecodedImage memory) {
uint8 paletteIndex = uint8(image[0]);
ContentBounds memory bounds = ContentBounds({
top: uint8(image[1]),
right: uint8(image[2]),
bottom: uint8(image[3]),
left: uint8(image[4])
});
uint256 cursor;
Rect[] memory rects = new Rect[]((image.length - 5) / 2);
for (uint256 i = 5; i < image.length; i += 2) {
rects[cursor] = Rect({ length: uint8(image[i]), colorIndex: uint8(image[i + 1]) });
cursor++;
}
return DecodedImage({ paletteIndex: paletteIndex, bounds: bounds, rects: rects });
}
}
// 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
/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
string internal constant TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {} lt(dataPtr, endPtr) {}
{
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
}
return result;
}
}
|
* @notice Add a single color to a color palette. @dev This function can only be called by the owner./
|
function addColorToPalette(uint8 _paletteIndex, string calldata _color)
external
override
onlyOwner
{
require(
palettes[_paletteIndex].length <= 287,
"Palettes can only hold 288 colors"
);
_addColorToPalette(_paletteIndex, _color);
}
| 10,042,698
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/token/ERC1155/extensions/ERC1155Burnable.sol";
import "@openzeppelin/contracts/token/ERC1155/extensions/ERC1155Pausable.sol";
import "@openzeppelin/contracts/token/ERC1155/extensions/ERC1155Supply.sol";
import "@openzeppelin/contracts/finance/PaymentSplitter.sol";
error InvalidMint();
error InvalidApproval();
error NoMaxSupply();
contract LegacyOfPolMedinaJr is
Ownable,
ReentrancyGuard,
ERC1155Burnable,
ERC1155Pausable,
ERC1155Supply
{
using Strings for uint256;
// ============ Constants ============
//royalty percent
uint256 public constant ROYALTY_PERCENT = 1000;
//royalty recipient
PaymentSplitter public immutable ROYALTY_RECIPIENT;
//bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a
bytes4 private constant _INTERFACE_ID_ERC2981 = 0x2a55205a;
// ============ Structs ============
struct Token {
uint256 maxSupply;
uint256 mintPrice;
bool active;
}
// ============ Storage ============
//mapping of token id to token info (max, price)
mapping(uint256 => Token) private _tokens;
//the contract metadata
string private _contractURI;
//a flag that allows NFTs to be listed on marketplaces
//this helps to prevent people from listing at a lower
//price during the whitelist
bool approvable = false;
// ============ Modifier ============
modifier canApprove {
if (!approvable) revert InvalidApproval();
_;
}
// ============ Deploy ============
/**
* @dev Sets the base token uri
*/
constructor(
string memory contract_uri,
string memory token_uri,
address[] memory payees,
uint256[] memory shares
) ERC1155(token_uri) {
ROYALTY_RECIPIENT = new PaymentSplitter(payees, shares);
_contractURI = contract_uri;
}
// ============ Read Methods ============
/**
* @dev Returns the contract URI
*/
function contractURI() external view returns(string memory) {
return _contractURI;
}
/**
* @dev Returns true if the token exists
*/
function exists(uint256 id) public view override returns(bool) {
return _tokens[id].active;
}
/**
* @dev Get the maximum supply for a token
*/
function maxSupply(uint256 id) public view returns(uint256) {
return _tokens[id].maxSupply;
}
/**
* @dev Get the mint supply for a token
*/
function mintPrice(uint256 id) public view returns(uint256) {
return _tokens[id].mintPrice;
}
/**
* @dev Returns the name
*/
function name() external pure returns(string memory) {
return "The Legacy of Pol Medina Jr.";
}
/**
* @dev Get the remaining supply for a token
*/
function remainingSupply(uint256 id) public view returns(uint256) {
uint256 max = maxSupply(id);
if (max == 0) revert NoMaxSupply();
return max - totalSupply(id);
}
/**
* @dev implements ERC2981 `royaltyInfo()`
*/
function royaltyInfo(uint256, uint256 salePrice)
external
view
returns(address receiver, uint256 royaltyAmount)
{
return (
payable(address(ROYALTY_RECIPIENT)),
(salePrice * ROYALTY_PERCENT) / 10000
);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns(bool)
{
//support ERC2981
if (interfaceId == _INTERFACE_ID_ERC2981) {
return true;
}
return super.supportsInterface(interfaceId);
}
/**
* @dev Returns the symbol
*/
function symbol() external pure returns(string memory) {
return "PMJR";
}
/**
* @dev Returns the max and price for a token
*/
function tokenInfo(uint256 id)
external view returns(uint256 max, uint256 price, uint256 remaining)
{
return (
_tokens[id].maxSupply,
_tokens[id].mintPrice,
remainingSupply(id)
);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256 id) public view virtual override returns(string memory) {
if (exists(id)) {
return string(abi.encodePacked(super.uri(id), "/", id.toString(), ".json"));
}
return string(abi.encodePacked(super.uri(id), "/{id}.json"));
}
// ============ Write Methods ============
/**
* @dev Allows anyone to mint by purchasing
*/
function buy(address to, uint256 id, uint256 quantity, bytes memory proof)
external payable nonReentrant
{
//make sure the minter signed this off
if (ECDSA.recover(
ECDSA.toEthSignedMessageHash(
keccak256(abi.encodePacked("authorized", to))
),
proof
) != owner()) revert InvalidMint();
//get price
uint256 price = mintPrice(id) * quantity;
//if there is a price and the amount sent is less than
if(price == 0 || msg.value < price) revert InvalidMint();
//we are okay to mint
_mintSupply(to, id, quantity);
}
/**
* @dev Check if can approve before approving
*/
function setApprovalForAll(address operator, bool approved)
public virtual override canApprove
{
super.setApprovalForAll(operator, approved);
}
// ============ Admin Methods ============
/**
* @dev Adds a token that can be minted
*/
function addToken(uint256 id, uint256 max, uint256 price, uint8 prizes)
public onlyOwner
{
_tokens[id] = Token(max, price, true);
if (prizes > 0) {
_mintSupply(_msgSender(), id, prizes);
}
}
/**
* @dev Allows admin to mint
*/
function mint(address to, uint256 id, uint256 quantity) public onlyOwner {
_mintSupply(to, id, quantity);
}
/**
* @dev Allows admin to update URI
*/
function updateURI(string memory newuri) public onlyOwner {
_setURI(newuri);
}
/**
* @dev Sends the entire contract balance to a `recipient`.
* This also enables NFTs to be listable on marketplaces.
*/
function withdraw(address recipient)
external virtual nonReentrant onlyOwner
{
//now make approvable, it's only here we will
//set this so it's kind of immutable (a one time deal)
if (!approvable) {
approvable = true;
}
Address.sendValue(payable(recipient), address(this).balance);
}
/**
* @dev This contract should not hold any tokens in the first place.
* This method exists to transfer out tokens funds.
*/
function withdraw(IERC20 erc20, address recipient, uint256 amount)
external virtual nonReentrant onlyOwner
{
SafeERC20.safeTransfer(erc20, recipient, amount);
}
// ============ Internal Methods ============
/**
* @dev Mint token considering max supply
*/
function _mintSupply(address to, uint256 id, uint256 quantity) internal {
//if the id does not exists
if (!exists(id)) revert InvalidMint();
//get max and calculated supply
uint256 max = maxSupply(id);
uint256 supply = totalSupply(id) + quantity;
//if there is a max supply and it was exceeded
if(max > 0 && supply > max) revert InvalidMint();
//we are okay to mint
_mint(to, id, quantity, "");
}
// ============ Overrides ============
/**
* @dev Describes linear override for `_beforeTokenTransfer` used in
* both `ERC721` and `ERC721Pausable`
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual override(ERC1155, ERC1155Pausable, ERC1155Supply) {
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/math/SafeMath.sol)
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC1155/extensions/ERC1155Burnable.sol)
pragma solidity ^0.8.0;
import "../ERC1155.sol";
/**
* @dev Extension of {ERC1155} that allows token holders to destroy both their
* own tokens and those that they have been approved to use.
*
* _Available since v3.1._
*/
abstract contract ERC1155Burnable is ERC1155 {
function burn(
address account,
uint256 id,
uint256 value
) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burn(account, id, value);
}
function burnBatch(
address account,
uint256[] memory ids,
uint256[] memory values
) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burnBatch(account, ids, values);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC1155/extensions/ERC1155Pausable.sol)
pragma solidity ^0.8.0;
import "../ERC1155.sol";
import "../../../security/Pausable.sol";
/**
* @dev ERC1155 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*
* _Available since v3.1._
*/
abstract contract ERC1155Pausable is ERC1155, Pausable {
/**
* @dev See {ERC1155-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual override {
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
require(!paused(), "ERC1155Pausable: token transfer while paused");
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC1155/extensions/ERC1155Supply.sol)
pragma solidity ^0.8.0;
import "../ERC1155.sol";
/**
* @dev Extension of ERC1155 that adds tracking of total supply per id.
*
* Useful for scenarios where Fungible and Non-fungible tokens have to be
* clearly identified. Note: While a totalSupply of 1 might mean the
* corresponding is an NFT, there is no guarantees that no other token with the
* same id are not going to be minted.
*/
abstract contract ERC1155Supply is ERC1155 {
mapping(uint256 => uint256) private _totalSupply;
/**
* @dev Total amount of tokens in with a given id.
*/
function totalSupply(uint256 id) public view virtual returns (uint256) {
return _totalSupply[id];
}
/**
* @dev Indicates whether any token exist with a given id, or not.
*/
function exists(uint256 id) public view virtual returns (bool) {
return ERC1155Supply.totalSupply(id) > 0;
}
/**
* @dev See {ERC1155-_beforeTokenTransfer}.
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual override {
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
if (from == address(0)) {
for (uint256 i = 0; i < ids.length; ++i) {
_totalSupply[ids[i]] += amounts[i];
}
}
if (to == address(0)) {
for (uint256 i = 0; i < ids.length; ++i) {
_totalSupply[ids[i]] -= amounts[i];
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (finance/PaymentSplitter.sol)
pragma solidity ^0.8.0;
import "../token/ERC20/utils/SafeERC20.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";
/**
* @title PaymentSplitter
* @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
* that the Ether will be split in this way, since it is handled transparently by the contract.
*
* The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
* account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
* an amount proportional to the percentage of total shares they were assigned.
*
* `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
* accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
* function.
*
* NOTE: This contract assumes that ERC20 tokens will behave similarly to native tokens (Ether). Rebasing tokens, and
* tokens that apply fees during transfers, are likely to not be supported as expected. If in doubt, we encourage you
* to run tests before sending real value to this contract.
*/
contract PaymentSplitter is Context {
event PayeeAdded(address account, uint256 shares);
event PaymentReleased(address to, uint256 amount);
event ERC20PaymentReleased(IERC20 indexed token, address to, uint256 amount);
event PaymentReceived(address from, uint256 amount);
uint256 private _totalShares;
uint256 private _totalReleased;
mapping(address => uint256) private _shares;
mapping(address => uint256) private _released;
address[] private _payees;
mapping(IERC20 => uint256) private _erc20TotalReleased;
mapping(IERC20 => mapping(address => uint256)) private _erc20Released;
/**
* @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
* the matching position in the `shares` array.
*
* All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
* duplicates in `payees`.
*/
constructor(address[] memory payees, uint256[] memory shares_) payable {
require(payees.length == shares_.length, "PaymentSplitter: payees and shares length mismatch");
require(payees.length > 0, "PaymentSplitter: no payees");
for (uint256 i = 0; i < payees.length; i++) {
_addPayee(payees[i], shares_[i]);
}
}
/**
* @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
* reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
* reliability of the events, and not the actual splitting of Ether.
*
* To learn more about this see the Solidity documentation for
* https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
* functions].
*/
receive() external payable virtual {
emit PaymentReceived(_msgSender(), msg.value);
}
/**
* @dev Getter for the total shares held by payees.
*/
function totalShares() public view returns (uint256) {
return _totalShares;
}
/**
* @dev Getter for the total amount of Ether already released.
*/
function totalReleased() public view returns (uint256) {
return _totalReleased;
}
/**
* @dev Getter for the total amount of `token` already released. `token` should be the address of an IERC20
* contract.
*/
function totalReleased(IERC20 token) public view returns (uint256) {
return _erc20TotalReleased[token];
}
/**
* @dev Getter for the amount of shares held by an account.
*/
function shares(address account) public view returns (uint256) {
return _shares[account];
}
/**
* @dev Getter for the amount of Ether already released to a payee.
*/
function released(address account) public view returns (uint256) {
return _released[account];
}
/**
* @dev Getter for the amount of `token` tokens already released to a payee. `token` should be the address of an
* IERC20 contract.
*/
function released(IERC20 token, address account) public view returns (uint256) {
return _erc20Released[token][account];
}
/**
* @dev Getter for the address of the payee number `index`.
*/
function payee(uint256 index) public view returns (address) {
return _payees[index];
}
/**
* @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
* total shares and their previous withdrawals.
*/
function release(address payable account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = address(this).balance + totalReleased();
uint256 payment = _pendingPayment(account, totalReceived, released(account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_released[account] += payment;
_totalReleased += payment;
Address.sendValue(account, payment);
emit PaymentReleased(account, payment);
}
/**
* @dev Triggers a transfer to `account` of the amount of `token` tokens they are owed, according to their
* percentage of the total shares and their previous withdrawals. `token` must be the address of an IERC20
* contract.
*/
function release(IERC20 token, address account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = token.balanceOf(address(this)) + totalReleased(token);
uint256 payment = _pendingPayment(account, totalReceived, released(token, account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_erc20Released[token][account] += payment;
_erc20TotalReleased[token] += payment;
SafeERC20.safeTransfer(token, account, payment);
emit ERC20PaymentReleased(token, account, payment);
}
/**
* @dev internal logic for computing the pending payment of an `account` given the token historical balances and
* already released amounts.
*/
function _pendingPayment(
address account,
uint256 totalReceived,
uint256 alreadyReleased
) private view returns (uint256) {
return (totalReceived * _shares[account]) / _totalShares - alreadyReleased;
}
/**
* @dev Add a new payee to the contract.
* @param account The address of the payee to add.
* @param shares_ The number of shares owned by the payee.
*/
function _addPayee(address account, uint256 shares_) private {
require(account != address(0), "PaymentSplitter: account is the zero address");
require(shares_ > 0, "PaymentSplitter: shares are 0");
require(_shares[account] == 0, "PaymentSplitter: account already has shares");
_payees.push(account);
_shares[account] = shares_;
_totalShares = _totalShares + shares_;
emit PayeeAdded(account, shares_);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (token/ERC1155/ERC1155.sol)
pragma solidity ^0.8.0;
import "./IERC1155.sol";
import "./IERC1155Receiver.sol";
import "./extensions/IERC1155MetadataURI.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using Address for address;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) public view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][to] += amount;
emit TransferSingle(operator, address(0), to, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `from`
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `from` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
emit TransferSingle(operator, from, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(
address from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
}
emit TransferBatch(operator, from, address(0), ids, amounts);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC1155: setting approval status for self");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver.onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
bytes4 response
) {
if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
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
// OpenZeppelin Contracts v4.4.0 (token/ERC1155/extensions/IERC1155MetadataURI.sol)
pragma solidity ^0.8.0;
import "../IERC1155.sol";
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 v4.4.0 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/utils/SafeERC20.sol)
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
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `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 Allows anyone to mint by purchasing/make sure the minter signed this offget priceif there is a price and the amount sent is less thanwe are okay to mint
|
function buy(address to, uint256 id, uint256 quantity, bytes memory proof)
external payable nonReentrant
{
if (ECDSA.recover(
ECDSA.toEthSignedMessageHash(
keccak256(abi.encodePacked("authorized", to))
),
proof
) != owner()) revert InvalidMint();
uint256 price = mintPrice(id) * quantity;
if(price == 0 || msg.value < price) revert InvalidMint();
_mintSupply(to, id, quantity);
}
| 14,365,843
|
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pragma solidity 0.5.8;
contract MessageReceiver {
// Each receiver manages messages for only one topic
string public topicName;
// Message key to message mapping for look-up
mapping(bytes32 => Message) public messages;
// Message key stored in an array for ordering/indexing
bytes32[] public messageList;
// Event to notify listening/interested parties
event MessageReceived(string topicName, address msgFrom, bytes32 msgKey);
struct Message {
address sender;
string message;
}
/**
* @notice Create a new MessageReceiver for a specific topic
*
* @param topic string The topic name for the messages
*/
constructor(string memory topic) public {
topicName = topic;
}
/**
* @notice Send a new message to the "bus". Emits a MessageReceived event.
*
* @param key bytes32 The key for your message, should be unique
* @param newMessage string The message contents
*/
function sendMessage(bytes32 key, string memory newMessage) public {
messageList.push(key);
messages[key].sender = msg.sender;
messages[key].message = newMessage;
emit MessageReceived(topicName, msg.sender, key);
}
/**
* @notice Gets the count of the messages sent to this topic
*
* @return uint256 Count of messages
*/
function getMessageCount() public view returns (uint256) {
return messageList.length;
}
/**
* @notice Gets a message given a key
*
* @return address, string Returns the sender address and message contents
*/
function getMessage(bytes32 key)
public
view
returns (address, string memory)
{
return (messages[key].sender, messages[key].message);
}
}
|
* @notice Send a new message to the "bus". Emits a MessageReceived event. @param key bytes32 The key for your message, should be unique @param newMessage string The message contents/
|
function sendMessage(bytes32 key, string memory newMessage) public {
messageList.push(key);
messages[key].sender = msg.sender;
messages[key].message = newMessage;
emit MessageReceived(topicName, msg.sender, key);
}
| 14,065,407
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contract Token {
/// @return total amount of tokens
function totalSupply() constant returns (uint256 supply) {}
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) constant returns (uint256 balance) {}
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) returns (bool success) {}
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) returns (bool success) {}
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
//Default assumes totalSupply can't be over max (2^256 - 1).
//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
//Replace the if with this one instead.
//if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else { return false; }
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
//same as above. Replace this line with the following if you want to protect against wrapping uints.
//if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else { return false; }
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply;
}
//name this contract whatever you'd like
contract LademiA is StandardToken {
function () {
//if ether is sent to this address, send it back.
throw;
}
/* 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.
*/
string public name; //fancy name: eg Simon Bucks
uint8 public decimals; //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; //An identifier: eg SBX
string public version = 'H1.0'; //human 0.1 standard. Just an arbitrary versioning scheme.
//
// CHANGE THESE VALUES FOR YOUR TOKEN
//
//make sure this function name matches the contract name above. So if you're token is called TutorialToken, make sure the //contract name above is also TutorialToken instead of ERC20Token
function LademiA(
) {
balances[msg.sender] = 1000000000; // Give the creator all initial tokens (100000 for example)
totalSupply = 1000000000; // Update total supply (100000 for example)
name = "LADEMIA"; // Set the name for display purposes
decimals = 5; // Amount of decimals for display purposes
symbol = "LADEA"; // Set the symbol for display purposes
}
/* Approves and then calls the receiving contract */
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
return true;
}
}
|
Set the name for display purposes
|
name = "LADEMIA";
| 4,814,541
|
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./full_match/1/0x9837Ce9825D52672Ca02533B5A160212bf901963/sources/contracts/plugins/assets/FiatCollateral.sol
|
set defaultThreshold to zero to create SelfReferentialCollateral
|
struct CollateralConfig {
pragma solidity 0.8.17;
}
| 16,407,557
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/**
*Submitted for verification at Etherscan.io on 2021-06-21
*/
//SPDX-License-Identifier: UNLICENSED
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
interface IWETH is IERC20 {
function deposit() external payable;
function withdraw(uint) external;
}
// This contract simply calls multiple targets sequentially, ensuring WETH balance before and after
contract FlashBotsMultiCall {
address private immutable owner;
address private immutable executor;
IWETH private constant WETH = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
modifier onlyExecutor() {
require(msg.sender == executor);
_;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
constructor(address _executor) public payable {
owner = msg.sender;
executor = _executor;
if (msg.value > 0) {
WETH.deposit{value: msg.value}();
}
}
receive() external payable {
}
function uniswapWeth(uint256 _wethAmountToFirstMarket, uint256 _ethAmountToCoinbase, address[] memory _targets, bytes[] memory _payloads) external onlyExecutor payable {
// eg: sanity check (make sure things match up)
require (_targets.length == _payloads.length);
uint256 _wethBalanceBefore = WETH.balanceOf(address(this));
// eg: transfer eth to first market
WETH.transfer(_targets[0], _wethAmountToFirstMarket);
// eg: loop through targets
for (uint256 i = 0; i < _targets.length; i++) {
// eg: this is where swaps happen, after all off chain stuff
(bool _success, bytes memory _response) = _targets[i].call(_payloads[i]);
require(_success); _response;
}
// eg: check if profitable, to pay minor
// (only pay minor if profitable)
uint256 _wethBalanceAfter = WETH.balanceOf(address(this));
require(_wethBalanceAfter > _wethBalanceBefore + _ethAmountToCoinbase);
if (_ethAmountToCoinbase == 0) return;
// eg: pay minor (if you don't, you can't do anything).. 'flashbots' minor?
uint256 _ethBalance = address(this).balance;
if (_ethBalance < _ethAmountToCoinbase) {
WETH.withdraw(_ethAmountToCoinbase - _ethBalance);
}
block.coinbase.transfer(_ethAmountToCoinbase);
}
function call(address payable _to, uint256 _value, bytes calldata _data) external onlyOwner payable returns (bytes memory) {
require(_to != address(0));
(bool _success, bytes memory _result) = _to.call{value: _value}(_data);
require(_success);
return _result;
}
}
|
eg: pay minor (if you don't, you can't do anything).. 'flashbots' minor?
|
uint256 _ethBalance = address(this).balance;
| 15,390,473
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./partial_match/1/0xBaBbfEEE65AB0c84337dc223169B2b8c91094f1B/sources/FXCMStake.sol
|
* @dev Library for managing an enumerable variant of Solidity's 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 { using EnumerableMap for EnumerableMap.UintToAddressMap; EnumerableMap.UintToAddressMap private myMap; } ``` As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are supported./ 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.
|
library EnumerableMap {
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
MapEntry[] _entries;
mapping(bytes32 => uint256) _indexes;
}
function _set(
Map storage map,
bytes32 key,
bytes32 value
) private returns (bool) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) {
map._indexes[key] = map._entries.length;
return true;
map._entries[keyIndex - 1]._value = value;
return false;
}
}
function _set(
Map storage map,
bytes32 key,
bytes32 value
) private returns (bool) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) {
map._indexes[key] = map._entries.length;
return true;
map._entries[keyIndex - 1]._value = value;
return false;
}
}
map._entries.push(MapEntry({_key : key, _value : value}));
} else {
function _remove(Map storage map, bytes32 key) private returns (bool) {
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) {
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
MapEntry storage lastEntry = map._entries[lastIndex];
map._entries[toDeleteIndex] = lastEntry;
map._indexes[lastEntry._key] = toDeleteIndex + 1;
map._entries.pop();
delete map._indexes[key];
return true;
return false;
}
}
function _remove(Map storage map, bytes32 key) private returns (bool) {
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) {
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
MapEntry storage lastEntry = map._entries[lastIndex];
map._entries[toDeleteIndex] = lastEntry;
map._indexes[lastEntry._key] = toDeleteIndex + 1;
map._entries.pop();
delete map._indexes[key];
return true;
return false;
}
}
} else {
function _contains(Map storage map, bytes32 key)
private
view
returns (bool)
{
return map._indexes[key] != 0;
}
function _length(Map storage map) private view returns (uint256) {
return map._entries.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);
}
function _tryGet(Map storage map, bytes32 key)
private
view
returns (bool, bytes32)
{
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) return (false, 0);
return (true, map._entries[keyIndex - 1]._value);
}
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, "EnumerableMap: nonexistent key");
return map._entries[keyIndex - 1]._value;
}
function _get(
Map storage map,
bytes32 key,
string memory errorMessage
) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage);
return map._entries[keyIndex - 1]._value;
}
struct UintToAddressMap {
Map _inner;
}
function set(
UintToAddressMap storage map,
uint256 key,
address value
) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
function remove(UintToAddressMap storage map, uint256 key)
internal
returns (bool)
{
return _remove(map._inner, bytes32(key));
}
function contains(UintToAddressMap storage map, uint256 key)
internal
view
returns (bool)
{
return _contains(map._inner, bytes32(key));
}
function length(UintToAddressMap storage map)
internal
view
returns (uint256)
{
return _length(map._inner);
}
function at(UintToAddressMap storage map, uint256 index)
internal
view
returns (uint256, address)
{
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
function tryGet(UintToAddressMap storage map, uint256 key)
internal
view
returns (bool, address)
{
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
function get(UintToAddressMap storage map, uint256 key)
internal
view
returns (address)
{
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
function get(
UintToAddressMap storage map,
uint256 key,
string memory errorMessage
) internal view returns (address) {
return
address(
uint160(uint256(_get(map._inner, bytes32(key), errorMessage)))
);
}
}
| 2,893,911
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./partial_match/97/0x25e059fBe7d81b6ad6Ed8E325DcAC65F45E6eE8F/sources/GET_NFT_V3.sol
|
Mappings for the ticketIsuer data storage Mappings for the event data storage
|
contract metadataLogic {
mapping(address => TicketIssuerStruct) public allTicketIssuerStructs;
address[] public ticketIssuerAddresses;
mapping(address => EventStruct) public allEventStructs;
address[] public eventAddresses;
event newEventRegistered(address indexed eventAddress, string indexed eventName, uint256 indexed _timestamp);
event newTicketIssuerMetaData(address indexed ticketIssuerAddress, string indexed ticketIssuerName, uint256 indexed _timestamp);
event primaryMarketNFTSold(address indexed eventAddress, uint256 indexed nftIndex, uint256 indexed pricePaidP);
event secondaryMarketNFTSold(address indexed eventAddress, uint256 indexed nftIndex, uint256 indexed pricePaidS);
struct OrdersPrimary {
uint256 _nftIndex;
uint256 _pricePaidP;
uint256 _orderTimeP;
}
struct OrdersSecondary {
uint256 _nftIndex;
uint256 _pricePaidS;
uint256 _orderTimeS;
}
struct TicketIssuerStruct {
address ticketissuer_address;
string ticketissuer_name;
uint256 listPointerT;
}
struct EventStruct {
address event_address;
string event_name;
string shop_url;
string latitude;
string longitude;
string currency;
uint256 start_time;
uint256 grossRevenuePrimary;
uint256 grossRevenueSecondary;
string ticketeer_name;
string ticketeer_id;
mapping (uint256 => OrdersPrimary) ordersprimary;
mapping (uint256 => OrdersSecondary) orderssecondary;
uint256 listPointerE;
}
function addNftMetaPrimary(address eventAddress, uint256 nftIndex, uint256 orderTimeP, uint256 pricePaidP) public virtual returns(bool success){
EventStruct storage c = allEventStructs[eventAddress];
c.grossRevenuePrimary += pricePaidP;
emit primaryMarketNFTSold(eventAddress, nftIndex, pricePaidP);
return true;
}
c.ordersprimary[nftIndex] = OrdersPrimary({_nftIndex: nftIndex, _pricePaidP: pricePaidP, _orderTimeP: orderTimeP});
function addNftMetaSecondary(address eventAddress, uint256 nftIndex, uint256 orderTimeS, uint256 pricePaidS) public virtual returns(bool success) {
EventStruct storage c = allEventStructs[eventAddress];
c.grossRevenueSecondary += pricePaidS;
emit secondaryMarketNFTSold(eventAddress, nftIndex, pricePaidS);
return true;
}
c.orderssecondary[nftIndex] = OrdersSecondary({_nftIndex: nftIndex, _pricePaidS: pricePaidS, _orderTimeS: orderTimeS});
function newTicketIssuer(address ticketIssuerAddress, string memory ticketIssuerName) public virtual returns(bool success) {
allTicketIssuerStructs[ticketIssuerAddress].ticketissuer_address = ticketIssuerAddress;
allTicketIssuerStructs[ticketIssuerAddress].ticketissuer_name = ticketIssuerName;
emit newTicketIssuerMetaData(ticketIssuerAddress, ticketIssuerName, block.timestamp);
ticketIssuerAddresses.push(ticketIssuerAddress);
allTicketIssuerStructs[ticketIssuerAddress].listPointerT = ticketIssuerAddresses.length - 1;
return true;
}
function registerEvent(address eventAddress, string memory eventName, string memory shopUrl, string memory latitude, string memory longitude, string memory currency, uint256 startingTime, address ticketIssuer, string memory ticketeerId, string memory ticketeerName) public virtual returns(bool success) {
allEventStructs[eventAddress].event_address = eventAddress;
allEventStructs[eventAddress].event_name = eventName;
allEventStructs[eventAddress].shop_url = shopUrl;
allEventStructs[eventAddress].currency = currency;
allEventStructs[eventAddress].latitude = latitude;
allEventStructs[eventAddress].longitude = longitude;
allEventStructs[eventAddress].start_time = startingTime;
allEventStructs[eventAddress].ticketeer_id = ticketeerId;
allEventStructs[eventAddress].ticketeer_name = ticketeerName;
eventAddresses.push(eventAddress);
allEventStructs[eventAddress].listPointerE = eventAddresses.length -1;
emit newEventRegistered(eventAddress, eventName, block.timestamp);
return true;
}
function getTicketIssuer(address ticketIssuerAddress) public virtual view returns(address, string memory ticketIssuerName) {
return(
allTicketIssuerStructs[ticketIssuerAddress].ticketissuer_address,
allTicketIssuerStructs[ticketIssuerAddress].ticketissuer_name);
}
function getEventDataAll(address eventAddress) public virtual view returns(string memory eventName, string memory shopUrl, uint256 startTime, uint256 grossRevenuePrimary) {
return(
allEventStructs[eventAddress].event_name,
allEventStructs[eventAddress].shop_url,
allEventStructs[eventAddress].start_time,
allEventStructs[eventAddress].grossRevenuePrimary);
}
function fetchPrimaryOrderNFT(address eventAddress, uint256 nftIndex) public view returns(uint256 _nftIndex, uint256 _pricePaidP) {
return(
allEventStructs[eventAddress].ordersprimary[nftIndex]._nftIndex,
allEventStructs[eventAddress].ordersprimary[nftIndex]._pricePaidP
);
}
function fetchSecondaryOrderNFT(address eventAddress, uint256 nftIndex) public view returns(uint256 _nftIndex, uint256 _pricePaidS) {
return(
allEventStructs[eventAddress].orderssecondary[nftIndex]._nftIndex,
allEventStructs[eventAddress].orderssecondary[nftIndex]._pricePaidS
);
}
function isEvent(address eventAddress) public view returns(bool isIndeed) {
if(eventAddresses.length == 0) return false;
return (eventAddresses[allEventStructs[eventAddress].listPointerE] == eventAddress);
}
function getEventCount() public view returns(uint256 eventCount) {
return eventAddresses.length;
}
function isTicketIssuer(address ticketIssuerAddress) public view returns(bool isIndeed) {
if(ticketIssuerAddresses.length == 0) return false;
return (ticketIssuerAddresses[allTicketIssuerStructs[ticketIssuerAddress].listPointerT] == ticketIssuerAddress);
}
function getTicketIssuerCount() public view returns(uint256 ticketIssuerCount) {
return ticketIssuerAddresses.length;
}
}
| 11,423,061
|
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//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/utils/cryptography/ECDSAUpgradeable.sol';
import './ERC721Upgradeable.sol';
interface IHonorToken {
function updateBalance(
address wallet,
uint256 debit,
uint256 credit
) external;
function balanceOf(address wallet) external view returns (uint256);
}
/***
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*
*
*
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* 888 888 888 8 888oooo8 `"Y8888o. 888
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* `Y8bood8P'Ybd' `YbodP' o888ooooood8 8""88888P' o888o
*
*
*
*/
contract ShadowQuest is OwnableUpgradeable, ERC721Upgradeable {
event Move(
address indexed owner,
uint256 indexed tokenId,
uint256 indexed direction
);
event LocationChanged(
uint8 indexed locationIdFrom,
uint8 indexed locationIdTo,
uint256 amount
);
uint256 public constant MAX_GEN0_SUPPLY = 9996;
uint256 public constant MAX_GEN1_SUPPLY = 18000;
uint256 public constant SALE_PRIVATE_PRICE = 0.075 ether;
uint256 public constant SALE_PUBLIC_PRICE = 0.08 ether;
uint256 public SALE_PUBLIC_STARTED_AT;
uint256 public SALE_PRIVATE_STARTED_AT;
uint256 public SALE_PRIVATE_MAX_SUPPLY;
uint256 public gen0Supply;
uint256 public gen1Supply;
string public provenanceHash;
IHonorToken public honorContract;
address private _proxyRegistryAddress;
address private _verifier;
string private _baseTokenURI;
struct TokenMeta {
address owner;
uint32 movedAt;
uint8 location;
uint56 meta;
}
mapping(uint256 => TokenMeta) public tokenState;
uint256[] internal _tokenStateKeys;
mapping(address => uint16) public _tokenOwnerState;
mapping(address => int16) private _balances;
uint256 public locationsBalance;
uint256[] public samsarIds;
function initialize(address verifier_, address proxyRegistryAddress_)
public
initializer
{
__ERC721_init('ShadowQuest', 'SQ');
__Ownable_init();
_verifier = verifier_;
_proxyRegistryAddress = proxyRegistryAddress_;
SALE_PRIVATE_MAX_SUPPLY = 3000;
}
/**
* This is used instead of msg.sender as transactions won't be sent by the original token owner, but by OpenSea.
*/
function _msgSender() internal view override returns (address sender) {
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
// Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
} else {
sender = msg.sender;
}
return sender;
}
function isOnArena(uint256 tokenId) internal view returns (bool) {
return tokenState[tokenId].location > 0;
}
function actualOwnerOf(uint256 tokenId) public view returns (address) {
if (tokenState[tokenId].owner != address(0)) {
return tokenState[tokenId].owner;
}
address tokenIdOwner = address(uint160(tokenId));
uint16 tokenIndex = uint16(tokenId >> 160);
require(_tokenOwnerState[tokenIdOwner] != 0, 'SQ: not minted');
require(
tokenIndex < _tokenOwnerState[tokenIdOwner],
'SQ: invalid index'
);
return tokenIdOwner;
}
/**
* @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'
);
if (owner_ == address(this)) {
return locationsBalance;
}
return uint16(int16(_tokenOwnerState[owner_]) + _balances[owner_]);
}
function ownerOf(uint256 tokenId)
public
view
virtual
override
returns (address)
{
if (isOnArena(tokenId)) {
return address(this);
}
return actualOwnerOf(tokenId);
}
/**
* @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
override
returns (bool)
{
if (tokenState[tokenId].owner != address(0)) {
return true;
}
address tokenIdOwner = address(uint160(tokenId));
uint16 tokenIndex = uint16(tokenId >> 160);
return
(_tokenOwnerState[tokenIdOwner] != 0) &&
(tokenIndex < _tokenOwnerState[tokenIdOwner]);
}
/**
* @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 override {
require(
ownerOf(tokenId) == from,
'ERC721: transfer from incorrect owner'
);
require(to != address(0), 'ERC721: transfer to the zero address');
require(to != from, "ERC721: can't transfer themself");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
if (tokenState[tokenId].owner == address(0)) {
_tokenStateKeys.push(tokenId);
}
_balances[from] -= 1;
_balances[to] += 1;
tokenState[tokenId].owner = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
function _recoverSigner(bytes32 hash, bytes memory signature)
internal
pure
returns (address)
{
return
ECDSAUpgradeable.recover(
ECDSAUpgradeable.toEthSignedMessageHash(hash),
signature
);
}
function random(uint256 nonce, uint256 number)
internal
view
returns (uint256)
{
return
uint256(
keccak256(
abi.encodePacked(
block.timestamp,
block.difficulty,
nonce,
msg.sender
)
)
) % number;
}
function mintGen1(
uint16 expectedAmount,
uint256[] calldata samsarIds_,
uint256 timestamp,
bytes memory sig
) external {
address sender = _msgSender();
uint16 tokenAmount = _tokenOwnerState[sender];
uint16 amount = expectedAmount - tokenAmount;
require(
amount > 0 && amount <= 10 && samsarIds_.length == amount,
'SQ: invalid amount'
);
require(
gen1Supply + amount < MAX_GEN1_SUPPLY,
'SQ: gen1 supply exceeded'
);
require(block.timestamp < timestamp, 'SQ: outdated transaction');
bytes32 hash = keccak256(
abi.encodePacked(sender, expectedAmount, samsarIds_, timestamp)
);
require(
_verifier == _recoverSigner(hash, sig),
'SQ: invalid signature'
);
uint256 ownerBase = uint256(uint160(sender));
bool stolen = false;
for (uint16 index; index < amount; index++) {
uint256 samsarId = samsarIds_[index];
uint256 rand = stolen ? 100 : random(samsarId + index, 100);
if (rand < 10 && isOnArena(samsarId)) {
address samsarOwner = actualOwnerOf(samsarId);
emit Transfer(
address(0),
sender,
uint256(uint160(samsarOwner)) |
(_tokenOwnerState[samsarOwner] << 160)
);
_tokenOwnerState[samsarOwner] += 1;
stolen = true;
} else {
emit Transfer(
address(0),
sender,
ownerBase | (tokenAmount << 160)
);
tokenAmount += 1;
}
}
_tokenOwnerState[sender] = tokenAmount;
gen1Supply += amount;
}
function move(
uint8 locationIdFrom,
uint8 locationIdTo,
uint256[] calldata tokenIds,
/**
* nation, notIterable, samsarNotIterable
*/
uint256[] calldata tokenMeta,
uint256 timestamp,
bytes memory sig
) external {
require(block.timestamp < timestamp, 'SQ: outdated transaction');
address sender = _msgSender();
bytes32 hash = keccak256(
abi.encodePacked(
sender,
locationIdFrom,
locationIdTo,
tokenIds,
tokenMeta,
timestamp
)
);
require(
_verifier == _recoverSigner(hash, sig),
'SQ: invalid signature'
);
for (uint256 index; index < tokenIds.length; index++) {
uint256 tokenId = tokenIds[index];
require(
actualOwnerOf(tokenId) == sender,
'SQ: not owner of the token'
);
TokenMeta storage _tokenMeta = tokenState[tokenId];
require(
_tokenMeta.location == locationIdFrom,
'SQ: incorrect location'
);
if (uint8(tokenMeta[index] >> 8) == 1) {
_tokenStateKeys.push(tokenId);
}
if (uint8(tokenMeta[index] >> 16) == 1) {
samsarIds.push(tokenId);
}
tokenState[tokenId] = TokenMeta({
owner: sender,
movedAt: uint32(block.timestamp),
location: locationIdTo,
meta: uint8(tokenMeta[index])
});
if (locationIdTo == 0) {
emit Transfer(address(this), sender, tokenId);
} else if (locationIdFrom == 0) {
emit Transfer(sender, address(this), tokenId);
}
}
uint256 tokensAmount = tokenIds.length;
if (locationIdFrom == 0) {
locationsBalance += tokensAmount;
} else if (locationIdTo == 0) {
locationsBalance -= tokensAmount;
}
emit LocationChanged(locationIdFrom, locationIdTo, tokensAmount);
}
function claim(
uint256 debit,
uint256 credit,
uint256 timestamp,
bytes memory sig
) external {
address sender = _msgSender();
bytes32 hash = keccak256(
abi.encodePacked(sender, debit, credit, timestamp)
);
require(
_verifier == _recoverSigner(hash, sig),
'SQ: invalid signature'
);
honorContract.updateBalance(sender, debit, credit);
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
/**
* Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
*/
function isApprovedForAll(address owner_, address operator_)
public
view
override
returns (bool)
{
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(_proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner_)) == operator_) {
return true;
}
return super.isApprovedForAll(owner_, operator_);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual returns (uint256) {
return gen0Supply + gen1Supply - locationsBalance;
}
struct TokenData {
address owner;
uint8 location;
uint32 movedAt;
uint56 meta;
uint256 tokenId;
}
function sliceTokenStateArray(
TokenData[] memory arr,
uint256 start,
uint256 length
) internal pure returns (TokenData[] memory) {
TokenData[] memory result = new TokenData[](length);
for (uint256 index; index < length; index++) {
result[index] = arr[start + index];
}
return result;
}
/**
* @dev location_ == -1 – any location
*/
function getSamsarTokensPool(int8 location_)
public
view
returns (TokenData[] memory)
{
TokenData[] memory samsarPool = new TokenData[](samsarIds.length);
uint256 samsarPoolIndex;
for (uint16 index; index < samsarIds.length; index++) {
uint256 tokenId = samsarIds[index];
TokenMeta storage tokenMeta = tokenState[tokenId];
if (
tokenMeta.meta == 1 &&
(location_ == -1 || uint8(location_) == tokenMeta.location)
) {
samsarPool[samsarPoolIndex++] = TokenData({
owner: tokenMeta.owner,
location: tokenMeta.location,
movedAt: tokenMeta.movedAt,
meta: tokenState[tokenId].meta,
tokenId: tokenId
});
}
}
return sliceTokenStateArray(samsarPool, 0, samsarPoolIndex);
}
function getSamsarTokens() external view returns (uint256[] memory) {
return samsarIds;
}
function getTokenStateKeys() external view returns (uint256[] memory) {
return _tokenStateKeys;
}
/**
* @dev location_ == -1 – any location
*/
function getOwnerTokens(address owner_, int8 location_)
public
view
returns (TokenData[] memory)
{
require(
owner_ != address(0),
'ERC721: balance query for the zero address'
);
uint256 balance = balanceOf(owner_);
TokenData[] memory ownedTokens = new TokenData[](balance);
uint256 ownerBase = uint256(uint160(owner_));
uint256 mintedAmount = _tokenOwnerState[owner_];
uint256 resultIndex;
for (uint256 index; index < mintedAmount; index++) {
uint256 tokenId = ownerBase | (index << 160);
TokenMeta storage currentTokenState = tokenState[tokenId];
if (
currentTokenState.owner == address(0) &&
(location_ == -1 || location_ == 0)
) {
ownedTokens[resultIndex++] = TokenData({
owner: currentTokenState.owner,
location: currentTokenState.location,
movedAt: currentTokenState.movedAt,
meta: currentTokenState.meta,
tokenId: tokenId
});
} else if (currentTokenState.owner == owner_) {
if (
location_ == -1 ||
uint8(location_) == currentTokenState.location
) {
ownedTokens[resultIndex++] = TokenData({
owner: currentTokenState.owner,
location: currentTokenState.location,
movedAt: currentTokenState.movedAt,
meta: currentTokenState.meta,
tokenId: tokenId
});
}
}
}
for (uint256 index = 0; index < _tokenStateKeys.length; index++) {
if (resultIndex == balance) {
break;
}
uint256 tokenId = _tokenStateKeys[index];
if (tokenState[tokenId].owner != owner_) {
continue;
}
address tokenIdOwner = address(uint160(tokenId));
if (tokenIdOwner == owner_) {
continue;
}
if (
location_ == -1 ||
tokenState[tokenId].location == uint8(location_)
) {
TokenMeta storage currentTokenState = tokenState[tokenId];
ownedTokens[resultIndex++] = TokenData({
owner: currentTokenState.owner,
location: currentTokenState.location,
movedAt: currentTokenState.movedAt,
meta: currentTokenState.meta,
tokenId: tokenId
});
}
}
return sliceTokenStateArray(ownedTokens, 0, resultIndex);
}
function getLocationTime(
TokenData memory tokenData,
uint256 timestampFrom_,
uint256 timestampTo_
) public pure returns (uint256) {
uint32 movedAt = tokenData.movedAt;
if (movedAt == 0) {
return 0;
}
uint256 timeFrom = timestampFrom_ > movedAt ? timestampFrom_ : movedAt;
return timestampTo_ - timeFrom;
}
function getTGHonrByTokens(
address owner_,
TokenData[] memory tokens_,
uint256 timestampFrom_,
uint256 timestampTo_
) public pure returns (uint256) {
uint256 honr = 0;
for (uint256 index = 0; index < tokens_.length; index++) {
TokenData memory tokenData = tokens_[index];
require(
tokenData.owner == owner_ && tokenData.location == 1,
'SQ: incorrect token'
);
uint256 locationTime = getLocationTime(
tokenData,
timestampFrom_,
timestampTo_
);
honr += (locationTime / 29 seconds);
}
return honr;
}
function getTGHonr(
address owner_,
uint256 timestampFrom_,
uint256 timestampTo_
) public view returns (uint256) {
return
getTGHonrByTokens(
owner_,
getOwnerTokens(owner_, 1),
timestampFrom_,
timestampTo_
);
}
/* OwnerOnly */
function setVerifier(address verifier_) external onlyOwner {
_verifier = verifier_;
}
function setBaseURI(string memory baseURI_) external onlyOwner {
_baseTokenURI = baseURI_;
}
function setState(
bool publicSaleState_,
bool privateSaleState_,
uint256 maxPresaleSupply_
) external onlyOwner {
SALE_PUBLIC_STARTED_AT = publicSaleState_ ? block.timestamp : 0;
SALE_PRIVATE_STARTED_AT = privateSaleState_ ? block.timestamp : 0;
SALE_PRIVATE_MAX_SUPPLY = maxPresaleSupply_;
}
function withdraw(uint256 amount) public onlyOwner {
(bool success, ) = _msgSender().call{value: amount}('');
require(success, 'Withdraw failed');
}
function withdrawAll() external onlyOwner {
withdraw(address(this).balance);
}
function setHonorContract(IHonorToken honorContract_) external onlyOwner {
honorContract = honorContract_;
}
function setLocationsBalance(uint256 amount) external onlyOwner {
locationsBalance = amount;
}
function pushTokenStateKeys(uint256[] calldata tokenIds)
external
onlyOwner
{
uint256 tokensAmount = tokenIds.length;
for (uint256 index; index < tokensAmount; index++) {
_tokenStateKeys.push(tokenIds[index]);
}
}
function _mintGen0(address sender, uint16 amount) internal {
require(
gen0Supply + amount <= MAX_GEN0_SUPPLY,
'SQ: gen0 supply overflow'
);
uint16 tokensAmount = _tokenOwnerState[sender] + amount;
uint256 ownerBase = uint256(uint160(sender));
for (
uint256 index = _tokenOwnerState[sender];
index < tokensAmount;
index++
) {
emit Transfer(address(0), sender, ownerBase | (index << 160));
}
_tokenOwnerState[sender] = tokensAmount;
gen0Supply += amount;
}
function mintReserved(address wallet, uint16 amount) external onlyOwner {
address receiver = wallet == address(0) ? _msgSender() : wallet;
_mintGen0(receiver, amount);
}
}
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of 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 !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../StringsUpgradeable.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSAUpgradeable {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", StringsUpgradeable.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import '@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC721/IERC721ReceiverUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721MetadataUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol';
import '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721Upgradeable is
Initializable,
ContextUpgradeable,
ERC165Upgradeable,
IERC721Upgradeable,
IERC721MetadataUpgradeable
{
using AddressUpgradeable for address;
using StringsUpgradeable for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
function __ERC721_init(string memory name_, string memory symbol_)
internal
onlyInitializing
{
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name_, symbol_);
}
function __ERC721_init_unchained(string memory name_, string memory symbol_)
internal
onlyInitializing
{
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC165Upgradeable, IERC165Upgradeable)
returns (bool)
{
return
interfaceId == type(IERC721Upgradeable).interfaceId ||
interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner)
public
view
virtual
override
returns (uint256)
{
require(false, 'Implementation required');
return 0;
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId)
public
view
virtual
override
returns (address)
{
require(false, 'Implementation required');
return address(0);
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
'ERC721Metadata: URI query for nonexistent token'
);
string memory baseURI = _baseURI();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = 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) {
require(false, 'Implementation required');
return false;
}
/**
* @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 = 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 {}
/**
* @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 {}
/**
* @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 {}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(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
IERC721ReceiverUpgradeable(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
)
returns (bytes4 retval) {
return
retval ==
IERC721ReceiverUpgradeable.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert(
'ERC721: transfer to non ERC721Receiver implementer'
);
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
uint256[44] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165Upgradeable.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// 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 IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721Upgradeable.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal onlyInitializing {
}
function __ERC165_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// 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 IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
|
* @dev location_ == -1 – any location/
|
function getSamsarTokensPool(int8 location_)
public
view
returns (TokenData[] memory)
{
TokenData[] memory samsarPool = new TokenData[](samsarIds.length);
uint256 samsarPoolIndex;
for (uint16 index; index < samsarIds.length; index++) {
uint256 tokenId = samsarIds[index];
TokenMeta storage tokenMeta = tokenState[tokenId];
if (
tokenMeta.meta == 1 &&
(location_ == -1 || uint8(location_) == tokenMeta.location)
) {
samsarPool[samsarPoolIndex++] = TokenData({
owner: tokenMeta.owner,
location: tokenMeta.location,
movedAt: tokenMeta.movedAt,
meta: tokenState[tokenId].meta,
tokenId: tokenId
});
}
}
return sliceTokenStateArray(samsarPool, 0, samsarPoolIndex);
}
| 10,339,184
|
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./partial_match/1/0xAd100C81305244a32372Bc307AB247864ce6c68a/sources/BKRW.sol
|
* @dev Sets individual's transferFeeNumerator and transferFeeDenominator. Its precedence is higher than global transfer fee./
|
function setIndividualTransferFee(
address addr,
uint256 numerator,
uint256 denominator
) public onlyOwner {
require(
numerator < denominator,
"numerator is equal to or greater than denominator"
);
_individualTransferFee[addr].numerator = numerator;
_individualTransferFee[addr].denominator = denominator;
emit SetIndividualTransferFee(addr, numerator, denominator);
}
| 3,982,375
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./full_match/80001/0x318bb19Ffe50bbbd30d750dD5a8474a5856e8d81/sources/_thirdweb-dev/contracts/base/ERC1155LazyMint.sol
|
//*/* @notice Returns the total supply of NFTs of a given tokenId @dev Mapping from tokenId => total circulating supply of NFTs of that tokenId.///*/
|
) internal onlyInitializing {
__ERC1155_init(_name, _symbol);
_setupOwner(_msgSender());
_setupPlatformFeeInfo(_royaltyRecipient, _royaltyBps);
_setupDefaultRoyaltyInfo(_royaltyRecipient, _royaltyBps);
_setupPrimarySaleRecipient(_royaltyRecipient);
__DefaultOperatorFilterer_init();
_setOperatorRestriction(true);
}
Overriden metadata logic
| 5,674,121
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pragma solidity ^0.5.4;
/**
* ERC20 contract interface.
*/
contract ERC20 {
function totalSupply() public view returns (uint);
function decimals() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view 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);
}
/**
* @title Module
* @dev Interface for a module.
* A module MUST implement the addModule() method to ensure that a wallet with at least one module
* can never end up in a "frozen" state.
* @author Julien Niset - <julien@argent.xyz>
*/
interface Module {
function init(BaseWallet _wallet) external;
function addModule(BaseWallet _wallet, Module _module) external;
function recoverToken(address _token) external;
}
/**
* @title BaseWallet
* @dev Simple modular wallet that authorises modules to call its invoke() method.
* Based on https://gist.github.com/Arachnid/a619d31f6d32757a4328a428286da186 by
* @author Julien Niset - <julien@argent.xyz>
*/
contract BaseWallet {
address public implementation;
address public owner;
mapping (address => bool) public authorised;
mapping (bytes4 => address) public enabled;
uint public modules;
function init(address _owner, address[] calldata _modules) external;
function authoriseModule(address _module, bool _value) external;
function enableStaticCall(address _module, bytes4 _method) external;
function setOwner(address _newOwner) external;
function invoke(address _target, uint _value, bytes calldata _data) external returns (bytes memory _result);
}
/**
* @title ModuleRegistry
* @dev Registry of authorised modules.
* Modules must be registered before they can be authorised on a wallet.
* @author Julien Niset - <julien@argent.xyz>
*/
contract ModuleRegistry {
function registerModule(address _module, bytes32 _name) external;
function deregisterModule(address _module) external;
function registerUpgrader(address _upgrader, bytes32 _name) external;
function deregisterUpgrader(address _upgrader) external;
function recoverToken(address _token) external;
function moduleInfo(address _module) external view returns (bytes32);
function upgraderInfo(address _upgrader) external view returns (bytes32);
function isRegisteredModule(address _module) external view returns (bool);
function isRegisteredModule(address[] calldata _modules) external view returns (bool);
function isRegisteredUpgrader(address _upgrader) external view returns (bool);
}
contract TokenPriceProvider {
mapping(address => uint256) public cachedPrices;
function setPrice(ERC20 _token, uint256 _price) public;
function setPriceForTokenList(ERC20[] calldata _tokens, uint256[] calldata _prices) external;
function getEtherValue(uint256 _amount, address _token) external view returns (uint256);
}
/**
* @title GuardianStorage
* @dev Contract storing the state of wallets related to guardians and lock.
* The contract only defines basic setters and getters with no logic. Only modules authorised
* for a wallet can modify its state.
* @author Julien Niset - <julien@argent.xyz>
* @author Olivier Van Den Biggelaar - <olivier@argent.xyz>
*/
contract GuardianStorage {
function addGuardian(BaseWallet _wallet, address _guardian) external;
function revokeGuardian(BaseWallet _wallet, address _guardian) external;
function guardianCount(BaseWallet _wallet) external view returns (uint256);
function getGuardians(BaseWallet _wallet) external view returns (address[] memory);
function isGuardian(BaseWallet _wallet, address _guardian) external view returns (bool);
function setLock(BaseWallet _wallet, uint256 _releaseAfter) external;
function isLocked(BaseWallet _wallet) external view returns (bool);
function getLock(BaseWallet _wallet) external view returns (uint256);
function getLocker(BaseWallet _wallet) external view returns (address);
}
/**
* @title TransferStorage
* @dev Contract storing the state of wallets related to transfers (limit and whitelist).
* The contract only defines basic setters and getters with no logic. Only modules authorised
* for a wallet can modify its state.
* @author Julien Niset - <julien@argent.xyz>
*/
contract TransferStorage {
function setWhitelist(BaseWallet _wallet, address _target, uint256 _value) external;
function getWhitelist(BaseWallet _wallet, address _target) external view returns (uint256);
}
/**
* @title Interface for a contract that can invest tokens in order to earn an interest.
* @author Julien Niset - <julien@argent.xyz>
*/
interface Invest {
event InvestmentAdded(address indexed _wallet, address _token, uint256 _invested, uint256 _period);
event InvestmentRemoved(address indexed _wallet, address _token, uint256 _fraction);
function addInvestment(
BaseWallet _wallet,
address _token,
uint256 _amount,
uint256 _period
)
external
returns (uint256 _invested);
function removeInvestment(
BaseWallet _wallet,
address _token,
uint256 _fraction
)
external;
function getInvestment(
BaseWallet _wallet,
address _token
)
external
view
returns (uint256 _tokenValue, uint256 _periodEnd);
}
contract VatLike {
function can(address, address) public view returns (uint);
function dai(address) public view returns (uint);
function hope(address) public;
}
contract JoinLike {
function gem() public returns (GemLike);
function dai() public returns (GemLike);
function join(address, uint) public;
function exit(address, uint) public;
VatLike public vat;
}
contract PotLike {
function chi() public view returns (uint);
function pie(address) public view returns (uint);
function drip() public;
}
contract ScdMcdMigration {
function swapSaiToDai(uint wad) external;
function swapDaiToSai(uint wad) external;
JoinLike public saiJoin;
JoinLike public wethJoin;
JoinLike public daiJoin;
}
contract GemLike {
function balanceOf(address) public view returns (uint);
function transferFrom(address, address, uint) public returns (bool);
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw 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;
}
/**
* @dev Returns ceil(a / b).
*/
function ceil(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
if(a % b == 0) {
return c;
}
else {
return c + 1;
}
}
}
/**
* @title BaseModule
* @dev Basic module that contains some methods common to all modules.
* @author Julien Niset - <julien@argent.im>
*/
contract BaseModule is Module {
// Empty calldata
bytes constant internal EMPTY_BYTES = "";
// The adddress of the module registry.
ModuleRegistry internal registry;
// The address of the Guardian storage
GuardianStorage internal guardianStorage;
/**
* @dev Throws if the wallet is locked.
*/
modifier onlyWhenUnlocked(BaseWallet _wallet) {
// solium-disable-next-line security/no-block-members
require(!guardianStorage.isLocked(_wallet), "BM: wallet must be unlocked");
_;
}
event ModuleCreated(bytes32 name);
event ModuleInitialised(address wallet);
constructor(ModuleRegistry _registry, GuardianStorage _guardianStorage, bytes32 _name) public {
registry = _registry;
guardianStorage = _guardianStorage;
emit ModuleCreated(_name);
}
/**
* @dev Throws if the sender is not the target wallet of the call.
*/
modifier onlyWallet(BaseWallet _wallet) {
require(msg.sender == address(_wallet), "BM: caller must be wallet");
_;
}
/**
* @dev Throws if the sender is not the owner of the target wallet or the module itself.
*/
modifier onlyWalletOwner(BaseWallet _wallet) {
require(msg.sender == address(this) || isOwner(_wallet, msg.sender), "BM: must be an owner for the wallet");
_;
}
/**
* @dev Throws if the sender is not the owner of the target wallet.
*/
modifier strictOnlyWalletOwner(BaseWallet _wallet) {
require(isOwner(_wallet, msg.sender), "BM: msg.sender must be an owner for the wallet");
_;
}
/**
* @dev Inits the module for a wallet by logging an event.
* The method can only be called by the wallet itself.
* @param _wallet The wallet.
*/
function init(BaseWallet _wallet) public onlyWallet(_wallet) {
emit ModuleInitialised(address(_wallet));
}
/**
* @dev Adds a module to a wallet. First checks that the module is registered.
* @param _wallet The target wallet.
* @param _module The modules to authorise.
*/
function addModule(BaseWallet _wallet, Module _module) external strictOnlyWalletOwner(_wallet) {
require(registry.isRegisteredModule(address(_module)), "BM: module is not registered");
_wallet.authoriseModule(address(_module), true);
}
/**
* @dev Utility method enbaling anyone to recover ERC20 token sent to the
* module by mistake and transfer them to the Module Registry.
* @param _token The token to recover.
*/
function recoverToken(address _token) external {
uint total = ERC20(_token).balanceOf(address(this));
ERC20(_token).transfer(address(registry), total);
}
/**
* @dev Helper method to check if an address is the owner of a target wallet.
* @param _wallet The target wallet.
* @param _addr The address.
*/
function isOwner(BaseWallet _wallet, address _addr) internal view returns (bool) {
return _wallet.owner() == _addr;
}
/**
* @dev Helper method to invoke a wallet.
* @param _wallet The target wallet.
* @param _to The target address for the transaction.
* @param _value The value of the transaction.
* @param _data The data of the transaction.
*/
function invokeWallet(address _wallet, address _to, uint256 _value, bytes memory _data) internal returns (bytes memory _res) {
bool success;
// solium-disable-next-line security/no-call-value
(success, _res) = _wallet.call(abi.encodeWithSignature("invoke(address,uint256,bytes)", _to, _value, _data));
if(success && _res.length > 0) { //_res is empty if _wallet is an "old" BaseWallet that can't return output values
(_res) = abi.decode(_res, (bytes));
} else if (_res.length > 0) {
// solium-disable-next-line security/no-inline-assembly
assembly {
returndatacopy(0, 0, returndatasize)
revert(0, returndatasize)
}
} else if(!success) {
revert("BM: wallet invoke reverted");
}
}
}
/**
* @title RelayerModule
* @dev Base module containing logic to execute transactions signed by eth-less accounts and sent by a relayer.
* @author Julien Niset - <julien@argent.im>
*/
contract RelayerModule is BaseModule {
uint256 constant internal BLOCKBOUND = 10000;
mapping (address => RelayerConfig) public relayer;
struct RelayerConfig {
uint256 nonce;
mapping (bytes32 => bool) executedTx;
}
event TransactionExecuted(address indexed wallet, bool indexed success, bytes32 signedHash);
/**
* @dev Throws if the call did not go through the execute() method.
*/
modifier onlyExecute {
require(msg.sender == address(this), "RM: must be called via execute()");
_;
}
/* ***************** Abstract method ************************* */
/**
* @dev Gets the number of valid signatures that must be provided to execute a
* specific relayed transaction.
* @param _wallet The target wallet.
* @param _data The data of the relayed transaction.
* @return The number of required signatures.
*/
function getRequiredSignatures(BaseWallet _wallet, bytes memory _data) internal view returns (uint256);
/**
* @dev Validates the signatures provided with a relayed transaction.
* The method MUST throw if one or more signatures are not valid.
* @param _wallet The target wallet.
* @param _data The data of the relayed transaction.
* @param _signHash The signed hash representing the relayed transaction.
* @param _signatures The signatures as a concatenated byte array.
*/
function validateSignatures(BaseWallet _wallet, bytes memory _data, bytes32 _signHash, bytes memory _signatures) internal view returns (bool);
/* ************************************************************ */
/**
* @dev Executes a relayed transaction.
* @param _wallet The target wallet.
* @param _data The data for the relayed transaction
* @param _nonce The nonce used to prevent replay attacks.
* @param _signatures The signatures as a concatenated byte array.
* @param _gasPrice The gas price to use for the gas refund.
* @param _gasLimit The gas limit to use for the gas refund.
*/
function execute(
BaseWallet _wallet,
bytes calldata _data,
uint256 _nonce,
bytes calldata _signatures,
uint256 _gasPrice,
uint256 _gasLimit
)
external
returns (bool success)
{
uint startGas = gasleft();
bytes32 signHash = getSignHash(address(this), address(_wallet), 0, _data, _nonce, _gasPrice, _gasLimit);
require(checkAndUpdateUniqueness(_wallet, _nonce, signHash), "RM: Duplicate request");
require(verifyData(address(_wallet), _data), "RM: the wallet authorized is different then the target of the relayed data");
uint256 requiredSignatures = getRequiredSignatures(_wallet, _data);
if((requiredSignatures * 65) == _signatures.length) {
if(verifyRefund(_wallet, _gasLimit, _gasPrice, requiredSignatures)) {
if(requiredSignatures == 0 || validateSignatures(_wallet, _data, signHash, _signatures)) {
// solium-disable-next-line security/no-call-value
(success,) = address(this).call(_data);
refund(_wallet, startGas - gasleft(), _gasPrice, _gasLimit, requiredSignatures, msg.sender);
}
}
}
emit TransactionExecuted(address(_wallet), success, signHash);
}
/**
* @dev Gets the current nonce for a wallet.
* @param _wallet The target wallet.
*/
function getNonce(BaseWallet _wallet) external view returns (uint256 nonce) {
return relayer[address(_wallet)].nonce;
}
/**
* @dev Generates the signed hash of a relayed transaction according to ERC 1077.
* @param _from The starting address for the relayed transaction (should be the module)
* @param _to The destination address for the relayed transaction (should be the wallet)
* @param _value The value for the relayed transaction
* @param _data The data for the relayed transaction
* @param _nonce The nonce used to prevent replay attacks.
* @param _gasPrice The gas price to use for the gas refund.
* @param _gasLimit The gas limit to use for the gas refund.
*/
function getSignHash(
address _from,
address _to,
uint256 _value,
bytes memory _data,
uint256 _nonce,
uint256 _gasPrice,
uint256 _gasLimit
)
internal
pure
returns (bytes32)
{
return keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n32",
keccak256(abi.encodePacked(byte(0x19), byte(0), _from, _to, _value, _data, _nonce, _gasPrice, _gasLimit))
));
}
/**
* @dev Checks if the relayed transaction is unique.
* @param _wallet The target wallet.
* @param _nonce The nonce
* @param _signHash The signed hash of the transaction
*/
function checkAndUpdateUniqueness(BaseWallet _wallet, uint256 _nonce, bytes32 _signHash) internal returns (bool) {
if(relayer[address(_wallet)].executedTx[_signHash] == true) {
return false;
}
relayer[address(_wallet)].executedTx[_signHash] = true;
return true;
}
/**
* @dev Checks that a nonce has the correct format and is valid.
* It must be constructed as nonce = {block number}{timestamp} where each component is 16 bytes.
* @param _wallet The target wallet.
* @param _nonce The nonce
*/
function checkAndUpdateNonce(BaseWallet _wallet, uint256 _nonce) internal returns (bool) {
if(_nonce <= relayer[address(_wallet)].nonce) {
return false;
}
uint256 nonceBlock = (_nonce & 0xffffffffffffffffffffffffffffffff00000000000000000000000000000000) >> 128;
if(nonceBlock > block.number + BLOCKBOUND) {
return false;
}
relayer[address(_wallet)].nonce = _nonce;
return true;
}
/**
* @dev Recovers the signer at a given position from a list of concatenated signatures.
* @param _signedHash The signed hash
* @param _signatures The concatenated signatures.
* @param _index The index of the signature to recover.
*/
function recoverSigner(bytes32 _signedHash, bytes memory _signatures, uint _index) internal pure returns (address) {
uint8 v;
bytes32 r;
bytes32 s;
// we jump 32 (0x20) as the first slot of bytes contains the length
// we jump 65 (0x41) per signature
// for v we load 32 bytes ending with v (the first 31 come from s) then apply a mask
// solium-disable-next-line security/no-inline-assembly
assembly {
r := mload(add(_signatures, add(0x20,mul(0x41,_index))))
s := mload(add(_signatures, add(0x40,mul(0x41,_index))))
v := and(mload(add(_signatures, add(0x41,mul(0x41,_index)))), 0xff)
}
require(v == 27 || v == 28);
return ecrecover(_signedHash, v, r, s);
}
/**
* @dev Refunds the gas used to the Relayer.
* For security reasons the default behavior is to not refund calls with 0 or 1 signatures.
* @param _wallet The target wallet.
* @param _gasUsed The gas used.
* @param _gasPrice The gas price for the refund.
* @param _gasLimit The gas limit for the refund.
* @param _signatures The number of signatures used in the call.
* @param _relayer The address of the Relayer.
*/
function refund(BaseWallet _wallet, uint _gasUsed, uint _gasPrice, uint _gasLimit, uint _signatures, address _relayer) internal {
uint256 amount = 29292 + _gasUsed; // 21000 (transaction) + 7620 (execution of refund) + 672 to log the event + _gasUsed
// only refund if gas price not null, more than 1 signatures, gas less than gasLimit
if(_gasPrice > 0 && _signatures > 1 && amount <= _gasLimit) {
if(_gasPrice > tx.gasprice) {
amount = amount * tx.gasprice;
}
else {
amount = amount * _gasPrice;
}
invokeWallet(address(_wallet), _relayer, amount, EMPTY_BYTES);
}
}
/**
* @dev Returns false if the refund is expected to fail.
* @param _wallet The target wallet.
* @param _gasUsed The expected gas used.
* @param _gasPrice The expected gas price for the refund.
*/
function verifyRefund(BaseWallet _wallet, uint _gasUsed, uint _gasPrice, uint _signatures) internal view returns (bool) {
if(_gasPrice > 0
&& _signatures > 1
&& (address(_wallet).balance < _gasUsed * _gasPrice || _wallet.authorised(address(this)) == false)) {
return false;
}
return true;
}
/**
* @dev Checks that the wallet address provided as the first parameter of the relayed data is the same
* as the wallet passed as the input of the execute() method.
@return false if the addresses are different.
*/
function verifyData(address _wallet, bytes memory _data) private pure returns (bool) {
require(_data.length >= 36, "RM: Invalid dataWallet");
address dataWallet;
// solium-disable-next-line security/no-inline-assembly
assembly {
//_data = {length:32}{sig:4}{_wallet:32}{...}
dataWallet := mload(add(_data, 0x24))
}
return dataWallet == _wallet;
}
/**
* @dev Parses the data to extract the method signature.
*/
function functionPrefix(bytes memory _data) internal pure returns (bytes4 prefix) {
require(_data.length >= 4, "RM: Invalid functionPrefix");
// solium-disable-next-line security/no-inline-assembly
assembly {
prefix := mload(add(_data, 0x20))
}
}
}
/**
* @title OnlyOwnerModule
* @dev Module that extends BaseModule and RelayerModule for modules where the execute() method
* must be called with one signature frm the owner.
* @author Julien Niset - <julien@argent.im>
*/
contract OnlyOwnerModule is BaseModule, RelayerModule {
// bytes4 private constant IS_ONLY_OWNER_MODULE = bytes4(keccak256("isOnlyOwnerModule()"));
/**
* @dev Returns a constant that indicates that the module is an OnlyOwnerModule.
* @return The constant bytes4(keccak256("isOnlyOwnerModule()"))
*/
function isOnlyOwnerModule() external pure returns (bytes4) {
// return IS_ONLY_OWNER_MODULE;
return this.isOnlyOwnerModule.selector;
}
/**
* @dev Adds a module to a wallet. First checks that the module is registered.
* Unlike its overrided parent, this method can be called via the RelayerModule's execute()
* @param _wallet The target wallet.
* @param _module The modules to authorise.
*/
function addModule(BaseWallet _wallet, Module _module) external onlyWalletOwner(_wallet) {
require(registry.isRegisteredModule(address(_module)), "BM: module is not registered");
_wallet.authoriseModule(address(_module), true);
}
// *************** Implementation of RelayerModule methods ********************* //
// Overrides to use the incremental nonce and save some gas
function checkAndUpdateUniqueness(BaseWallet _wallet, uint256 _nonce, bytes32 /* _signHash */) internal returns (bool) {
return checkAndUpdateNonce(_wallet, _nonce);
}
function validateSignatures(
BaseWallet _wallet,
bytes memory /* _data */,
bytes32 _signHash,
bytes memory _signatures
)
internal
view
returns (bool)
{
address signer = recoverSigner(_signHash, _signatures, 0);
return isOwner(_wallet, signer); // "OOM: signer must be owner"
}
function getRequiredSignatures(BaseWallet /* _wallet */, bytes memory /* _data */) internal view returns (uint256) {
return 1;
}
}
/**
* @title LimitManager
* @dev Module to manage a daily spending limit
* @author Julien Niset - <julien@argent.im>
*/
contract LimitManager is BaseModule {
// large limit when the limit can be considered disabled
uint128 constant private LIMIT_DISABLED = uint128(-1); // 3.40282366920938463463374607431768211455e+38
using SafeMath for uint256;
struct LimitManagerConfig {
// The daily limit
Limit limit;
// The current usage
DailySpent dailySpent;
}
struct Limit {
// the current limit
uint128 current;
// the pending limit if any
uint128 pending;
// when the pending limit becomes the current limit
uint64 changeAfter;
}
struct DailySpent {
// The amount already spent during the current period
uint128 alreadySpent;
// The end of the current period
uint64 periodEnd;
}
// wallet specific storage
mapping (address => LimitManagerConfig) internal limits;
// The default limit
uint256 public defaultLimit;
// *************** Events *************************** //
event LimitChanged(address indexed wallet, uint indexed newLimit, uint64 indexed startAfter);
// *************** Constructor ********************** //
constructor(uint256 _defaultLimit) public {
defaultLimit = _defaultLimit;
}
// *************** External/Public Functions ********************* //
/**
* @dev Inits the module for a wallet by setting the limit to the default value.
* @param _wallet The target wallet.
*/
function init(BaseWallet _wallet) public onlyWallet(_wallet) {
Limit storage limit = limits[address(_wallet)].limit;
if(limit.current == 0 && limit.changeAfter == 0) {
limit.current = uint128(defaultLimit);
}
}
// *************** Internal Functions ********************* //
/**
* @dev Changes the daily limit.
* The limit is expressed in ETH and the change is pending for the security period.
* @param _wallet The target wallet.
* @param _newLimit The new limit.
* @param _securityPeriod The security period.
*/
function changeLimit(BaseWallet _wallet, uint256 _newLimit, uint256 _securityPeriod) internal {
Limit storage limit = limits[address(_wallet)].limit;
// solium-disable-next-line security/no-block-members
uint128 current = (limit.changeAfter > 0 && limit.changeAfter < now) ? limit.pending : limit.current;
limit.current = current;
limit.pending = uint128(_newLimit);
// solium-disable-next-line security/no-block-members
limit.changeAfter = uint64(now.add(_securityPeriod));
// solium-disable-next-line security/no-block-members
emit LimitChanged(address(_wallet), _newLimit, uint64(now.add(_securityPeriod)));
}
/**
* @dev Disable the daily limit.
* The change is pending for the security period.
* @param _wallet The target wallet.
* @param _securityPeriod The security period.
*/
function disableLimit(BaseWallet _wallet, uint256 _securityPeriod) internal {
changeLimit(_wallet, LIMIT_DISABLED, _securityPeriod);
}
/**
* @dev Gets the current daily limit for a wallet.
* @param _wallet The target wallet.
* @return the current limit expressed in ETH.
*/
function getCurrentLimit(BaseWallet _wallet) public view returns (uint256 _currentLimit) {
Limit storage limit = limits[address(_wallet)].limit;
_currentLimit = uint256(currentLimit(limit.current, limit.pending, limit.changeAfter));
}
/**
* @dev Returns whether the daily limit is disabled for a wallet.
* @param _wallet The target wallet.
* @return true if the daily limit is disabled, false otherwise.
*/
function isLimitDisabled(BaseWallet _wallet) public view returns (bool _limitDisabled) {
uint256 currentLimit = getCurrentLimit(_wallet);
_limitDisabled = currentLimit == LIMIT_DISABLED;
}
/**
* @dev Gets a pending limit for a wallet if any.
* @param _wallet The target wallet.
* @return the pending limit (in ETH) and the time at chich it will become effective.
*/
function getPendingLimit(BaseWallet _wallet) external view returns (uint256 _pendingLimit, uint64 _changeAfter) {
Limit storage limit = limits[address(_wallet)].limit;
// solium-disable-next-line security/no-block-members
return ((now < limit.changeAfter)? (uint256(limit.pending), limit.changeAfter) : (0,0));
}
/**
* @dev Gets the amount of tokens that has not yet been spent during the current period.
* @param _wallet The target wallet.
* @return the amount of tokens (in ETH) that has not been spent yet and the end of the period.
*/
function getDailyUnspent(BaseWallet _wallet) external view returns (uint256 _unspent, uint64 _periodEnd) {
uint256 limit = getCurrentLimit(_wallet);
DailySpent storage expense = limits[address(_wallet)].dailySpent;
// solium-disable-next-line security/no-block-members
if(now > expense.periodEnd) {
_unspent = limit;
// solium-disable-next-line security/no-block-members
_periodEnd = uint64(now + 24 hours);
}
else {
_periodEnd = expense.periodEnd;
if(expense.alreadySpent < limit) {
_unspent = limit - expense.alreadySpent;
}
}
}
/**
* @dev Helper method to check if a transfer is within the limit.
* If yes the daily unspent for the current period is updated.
* @param _wallet The target wallet.
* @param _amount The amount for the transfer
*/
function checkAndUpdateDailySpent(BaseWallet _wallet, uint _amount) internal returns (bool) {
if(_amount == 0) return true;
Limit storage limit = limits[address(_wallet)].limit;
uint128 current = currentLimit(limit.current, limit.pending, limit.changeAfter);
if(isWithinDailyLimit(_wallet, current, _amount)) {
updateDailySpent(_wallet, current, _amount);
return true;
}
return false;
}
/**
* @dev Helper method to update the daily spent for the current period.
* @param _wallet The target wallet.
* @param _limit The current limit for the wallet.
* @param _amount The amount to add to the daily spent.
*/
function updateDailySpent(BaseWallet _wallet, uint128 _limit, uint _amount) internal {
if(_limit != LIMIT_DISABLED) {
DailySpent storage expense = limits[address(_wallet)].dailySpent;
// solium-disable-next-line security/no-block-members
if (expense.periodEnd < now) {
// solium-disable-next-line security/no-block-members
expense.periodEnd = uint64(now + 24 hours);
expense.alreadySpent = uint128(_amount);
}
else {
expense.alreadySpent += uint128(_amount);
}
}
}
/**
* @dev Checks if a transfer amount is withing the daily limit for a wallet.
* @param _wallet The target wallet.
* @param _limit The current limit for the wallet.
* @param _amount The transfer amount.
* @return true if the transfer amount is withing the daily limit.
*/
function isWithinDailyLimit(BaseWallet _wallet, uint _limit, uint _amount) internal view returns (bool) {
if(_limit == LIMIT_DISABLED) {
return true;
}
DailySpent storage expense = limits[address(_wallet)].dailySpent;
// solium-disable-next-line security/no-block-members
if (expense.periodEnd < now) {
return (_amount <= _limit);
} else {
return (expense.alreadySpent + _amount <= _limit && expense.alreadySpent + _amount >= expense.alreadySpent);
}
}
/**
* @dev Helper method to get the current limit from a Limit struct.
* @param _current The value of the current parameter
* @param _pending The value of the pending parameter
* @param _changeAfter The value of the changeAfter parameter
*/
function currentLimit(uint128 _current, uint128 _pending, uint64 _changeAfter) internal view returns (uint128) {
// solium-disable-next-line security/no-block-members
if(_changeAfter > 0 && _changeAfter < now) {
return _pending;
}
return _current;
}
}
/**
* @title BaseTransfer
* @dev Module containing internal methods to execute or approve transfers
* @author Olivier VDB - <olivier@argent.xyz>
*/
contract BaseTransfer is BaseModule {
// Mock token address for ETH
address constant internal ETH_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
// *************** Events *************************** //
event Transfer(address indexed wallet, address indexed token, uint256 indexed amount, address to, bytes data);
event Approved(address indexed wallet, address indexed token, uint256 amount, address spender);
event CalledContract(address indexed wallet, address indexed to, uint256 amount, bytes data);
// *************** Internal Functions ********************* //
/**
* @dev Helper method to transfer ETH or ERC20 for a wallet.
* @param _wallet The target wallet.
* @param _token The ERC20 address.
* @param _to The recipient.
* @param _value The amount of ETH to transfer
* @param _data The data to *log* with the transfer.
*/
function doTransfer(BaseWallet _wallet, address _token, address _to, uint256 _value, bytes memory _data) internal {
if(_token == ETH_TOKEN) {
invokeWallet(address(_wallet), _to, _value, EMPTY_BYTES);
}
else {
bytes memory methodData = abi.encodeWithSignature("transfer(address,uint256)", _to, _value);
invokeWallet(address(_wallet), _token, 0, methodData);
}
emit Transfer(address(_wallet), _token, _value, _to, _data);
}
/**
* @dev Helper method to approve spending the ERC20 of a wallet.
* @param _wallet The target wallet.
* @param _token The ERC20 address.
* @param _spender The spender address.
* @param _value The amount of token to transfer.
*/
function doApproveToken(BaseWallet _wallet, address _token, address _spender, uint256 _value) internal {
bytes memory methodData = abi.encodeWithSignature("approve(address,uint256)", _spender, _value);
invokeWallet(address(_wallet), _token, 0, methodData);
emit Approved(address(_wallet), _token, _value, _spender);
}
/**
* @dev Helper method to call an external contract.
* @param _wallet The target wallet.
* @param _contract The contract address.
* @param _value The ETH value to transfer.
* @param _data The method data.
*/
function doCallContract(BaseWallet _wallet, address _contract, uint256 _value, bytes memory _data) internal {
invokeWallet(address(_wallet), _contract, _value, _data);
emit CalledContract(address(_wallet), _contract, _value, _data);
}
}
/**
* @title MakerV2Manager
* @dev Module to convert SAI <-> DAI and lock/unlock MCD DAI into/from Maker's Pot,
* @author Olivier VDB - <olivier@argent.xyz>
*/
contract MakerV2Manager is Invest, BaseModule, RelayerModule, OnlyOwnerModule {
bytes32 constant NAME = "MakerV2Manager";
// The address of the SAI token
GemLike public saiToken;
// The address of the (MCD) DAI token
GemLike public daiToken;
// The address of the SAI <-> DAI migration contract
address public scdMcdMigration;
// The address of the Pot
PotLike public pot;
// The address of the Dai Adapter
JoinLike public daiJoin;
// The address of the Vat
VatLike public vat;
// Method signatures to reduce gas cost at depoyment
bytes4 constant internal ERC20_APPROVE = bytes4(keccak256("approve(address,uint256)"));
bytes4 constant internal SWAP_SAI_DAI = bytes4(keccak256("swapSaiToDai(uint256)"));
bytes4 constant internal SWAP_DAI_SAI = bytes4(keccak256("swapDaiToSai(uint256)"));
bytes4 constant internal ADAPTER_JOIN = bytes4(keccak256("join(address,uint256)"));
bytes4 constant internal ADAPTER_EXIT = bytes4(keccak256("exit(address,uint256)"));
bytes4 constant internal VAT_HOPE = bytes4(keccak256("hope(address)"));
bytes4 constant internal POT_JOIN = bytes4(keccak256("join(uint256)"));
bytes4 constant internal POT_EXIT = bytes4(keccak256("exit(uint256)"));
uint256 constant internal RAY = 10 ** 27;
using SafeMath for uint256;
// ****************** Events *************************** //
event TokenConverted(address indexed _wallet, address _srcToken, uint _srcAmount, address _destToken, uint _destAmount);
// *************** Constructor ********************** //
constructor(
ModuleRegistry _registry,
GuardianStorage _guardianStorage,
ScdMcdMigration _scdMcdMigration,
PotLike _pot
)
BaseModule(_registry, _guardianStorage, NAME)
public
{
scdMcdMigration = address(_scdMcdMigration);
saiToken = _scdMcdMigration.saiJoin().gem();
daiJoin = _scdMcdMigration.daiJoin();
vat = daiJoin.vat();
daiToken = daiJoin.dai();
pot = _pot;
}
// *************** External/Public Functions ********************* //
/* ********************************** Implementation of Invest ************************************* */
/**
* @dev Invest tokens for a given period.
* @param _wallet The target wallet.
* @param _token The token address.
* @param _amount The amount of tokens to invest.
* @param _period The period over which the tokens may be locked in the investment (optional).
* @return The exact amount of tokens that have been invested.
*/
function addInvestment(
BaseWallet _wallet,
address _token,
uint256 _amount,
uint256 _period
)
external
returns (uint256 _invested)
{
require(_token == address(daiToken), "DM: token should be DAI");
joinDsr(_wallet, _amount);
_invested = _amount;
emit InvestmentAdded(address(_wallet), address(daiToken), _amount, _period);
}
/**
* @dev Exit invested postions.
* @param _wallet The target wallet.
* @param _token The token address.
* @param _fraction The fraction of invested tokens to exit in per 10000.
*/
function removeInvestment(
BaseWallet _wallet,
address _token,
uint256 _fraction
)
external
{
require(_token == address(daiToken), "DM: token should be DAI");
require(_fraction <= 10000, "DM: invalid fraction value");
exitDsr(_wallet, dsrBalance(_wallet).mul(_fraction) / 10000);
emit InvestmentRemoved(address(_wallet), _token, _fraction);
}
/**
* @dev Get the amount of investment in a given token.
* @param _wallet The target wallet.
* @param _token The token address.
* @return The value in tokens of the investment (including interests) and the time at which the investment can be removed.
*/
function getInvestment(
BaseWallet _wallet,
address _token
)
external
view
returns (uint256 _tokenValue, uint256 _periodEnd)
{
_tokenValue = _token == address(daiToken) ? dsrBalance(_wallet) : 0;
_periodEnd = 0;
}
/* ****************************************** DSR wrappers ******************************************* */
function dsrBalance(BaseWallet _wallet) public view returns (uint256) {
return pot.chi().mul(pot.pie(address(_wallet))) / RAY;
}
/**
* @dev lets the owner deposit MCD DAI into the DSR Pot.
* @param _wallet The target wallet.
* @param _amount The amount of DAI to deposit
*/
function joinDsr(
BaseWallet _wallet,
uint256 _amount
)
public
onlyWalletOwner(_wallet)
onlyWhenUnlocked(_wallet)
{
if (daiToken.balanceOf(address(_wallet)) < _amount) {
swapSaiToDai(_wallet, _amount - daiToken.balanceOf(address(_wallet)));
}
// Execute drip to get the chi rate updated to rho == now, otherwise join will fail
pot.drip();
// Approve DAI adapter to take the DAI amount
invokeWallet(address(_wallet), address(daiToken), 0, abi.encodeWithSelector(ERC20_APPROVE, address(daiJoin), _amount));
// Join DAI into the vat (_amount of external DAI is burned and the vat transfers _amount of internal DAI from the adapter to the _wallet)
invokeWallet(address(_wallet), address(daiJoin), 0, abi.encodeWithSelector(ADAPTER_JOIN, address(_wallet), _amount));
// Approve the pot to take out (internal) DAI from the wallet's balance in the vat
if (vat.can(address(_wallet), address(pot)) == 0) {
invokeWallet(address(_wallet), address(vat), 0, abi.encodeWithSelector(VAT_HOPE, address(pot)));
}
// Compute the pie value in the pot
uint256 pie = _amount.mul(RAY) / pot.chi();
// Join the pie value to the pot
invokeWallet(address(_wallet), address(pot), 0, abi.encodeWithSelector(POT_JOIN, pie));
}
/**
* @dev lets the owner withdraw MCD DAI from the DSR Pot.
* @param _wallet The target wallet.
* @param _amount The amount of DAI to withdraw
*/
function exitDsr(
BaseWallet _wallet,
uint256 _amount
)
public
onlyWalletOwner(_wallet)
onlyWhenUnlocked(_wallet)
{
// Execute drip to count the savings accumulated until this moment
pot.drip();
// Calculates the pie value in the pot equivalent to the DAI wad amount
uint256 pie = _amount.mul(RAY) / pot.chi();
// Exit DAI from the pot
invokeWallet(address(_wallet), address(pot), 0, abi.encodeWithSelector(POT_EXIT, pie));
// Allow adapter to access the _wallet's DAI balance in the vat
if (vat.can(address(_wallet), address(daiJoin)) == 0) {
invokeWallet(address(_wallet), address(vat), 0, abi.encodeWithSelector(VAT_HOPE, address(daiJoin)));
}
// Check the actual balance of DAI in the vat after the pot exit
uint bal = vat.dai(address(_wallet));
// It is necessary to check if due to rounding the exact _amount can be exited by the adapter.
// Otherwise it will do the maximum DAI balance in the vat
uint256 withdrawn = bal >= _amount.mul(RAY) ? _amount : bal / RAY;
invokeWallet(address(_wallet), address(daiJoin), 0, abi.encodeWithSelector(ADAPTER_EXIT, address(_wallet), withdrawn));
}
function exitAllDsr(
BaseWallet _wallet
)
external
onlyWalletOwner(_wallet)
onlyWhenUnlocked(_wallet)
{
// Execute drip to count the savings accumulated until this moment
pot.drip();
// Gets the total pie belonging to the _wallet
uint256 pie = pot.pie(address(_wallet));
// Exit DAI from the pot
invokeWallet(address(_wallet), address(pot), 0, abi.encodeWithSelector(POT_EXIT, pie));
// Allow adapter to access the _wallet's DAI balance in the vat
if (vat.can(address(_wallet), address(daiJoin)) == 0) {
invokeWallet(address(_wallet), address(vat), 0, abi.encodeWithSelector(VAT_HOPE, address(daiJoin)));
}
// Exits the DAI amount corresponding to the value of pie
uint256 withdrawn = pot.chi().mul(pie) / RAY;
invokeWallet(address(_wallet), address(daiJoin), 0, abi.encodeWithSelector(ADAPTER_EXIT, address(_wallet), withdrawn));
}
/**
* @dev lets the owner convert SCD SAI into MCD DAI.
* @param _wallet The target wallet.
* @param _amount The amount of SAI to convert
*/
function swapSaiToDai(
BaseWallet _wallet,
uint256 _amount
)
public
onlyWalletOwner(_wallet)
onlyWhenUnlocked(_wallet)
{
require(saiToken.balanceOf(address(_wallet)) >= _amount, "DM: insufficient SAI");
invokeWallet(address(_wallet), address(saiToken), 0, abi.encodeWithSelector(ERC20_APPROVE, scdMcdMigration, _amount));
invokeWallet(address(_wallet), scdMcdMigration, 0, abi.encodeWithSelector(SWAP_SAI_DAI, _amount));
emit TokenConverted(address(_wallet), address(saiToken), _amount, address(daiToken), _amount);
}
/**
* @dev lets the owner convert MCD DAI into SCD SAI.
* @param _wallet The target wallet.
* @param _amount The amount of DAI to convert
*/
function swapDaiToSai(
BaseWallet _wallet,
uint256 _amount
)
external
onlyWalletOwner(_wallet)
onlyWhenUnlocked(_wallet)
{
require(daiToken.balanceOf(address(_wallet)) >= _amount, "DM: insufficient DAI");
invokeWallet(address(_wallet), address(daiToken), 0, abi.encodeWithSelector(ERC20_APPROVE, scdMcdMigration, _amount));
invokeWallet(address(_wallet), scdMcdMigration, 0, abi.encodeWithSelector(SWAP_DAI_SAI, _amount));
emit TokenConverted(address(_wallet), address(daiToken), _amount, address(saiToken), _amount);
}
}
|
* @dev Get the amount of investment in a given token. @param _wallet The target wallet. @param _token The token address. @return The value in tokens of the investment (including interests) and the time at which the investment can be removed./
|
function getInvestment(
BaseWallet _wallet,
address _token
)
external
view
returns (uint256 _tokenValue, uint256 _periodEnd)
{
_tokenValue = _token == address(daiToken) ? dsrBalance(_wallet) : 0;
_periodEnd = 0;
}
| 2,472,132
|
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// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Connector
* @author Primitive
* @notice Low-level abstract contract for Primitive Connectors to inherit from.
* @dev @primitivefi/[email protected]
*/
// Open Zeppelin
import {Context} from "@openzeppelin/contracts/GSN/Context.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
// Primitive
import {CoreLib, IOption} from "../libraries/CoreLib.sol";
import {
IPrimitiveConnector,
IPrimitiveRouter,
IWETH
} from "../interfaces/IPrimitiveConnector.sol";
abstract contract PrimitiveConnector is IPrimitiveConnector, Context {
using SafeERC20 for IERC20; // Reverts when `transfer` or `transferFrom` erc20 calls don't return proper data
IWETH internal _weth; // Canonical WETH9
IPrimitiveRouter internal _primitiveRouter; // The PrimitiveRouter contract which executes calls.
mapping(address => mapping(address => bool)) internal _approved; // Stores approvals for future checks.
// ===== Constructor =====
constructor(address weth_, address primitiveRouter_) public {
_weth = IWETH(weth_);
_primitiveRouter = IPrimitiveRouter(primitiveRouter_);
checkApproval(weth_, primitiveRouter_); // Approves this contract's weth to be spent by router.
}
/**
* @notice Reverts if the `option` is not registered in the PrimitiveRouter contract.
* @dev Any `option` which is deployed from the Primitive Registry can be registered with the Router.
* @param option The Primitive Option to check if registered.
*/
modifier onlyRegistered(IOption option) {
require(
_primitiveRouter.getRegisteredOption(address(option)),
"PrimitiveSwaps: EVIL_OPTION"
);
_;
}
// ===== External =====
/**
* @notice Approves the `spender` to pull `token` from this contract.
* @dev This contract does not hold funds, infinite approvals cannot be exploited for profit.
* @param token The token to approve spending for.
* @param spender The address to allow to spend `token`.
*/
function checkApproval(address token, address spender)
public
override
returns (bool)
{
if (!_approved[token][spender]) {
IERC20(token).safeApprove(spender, uint256(-1));
_approved[token][spender] = true;
}
return true;
}
// ===== Internal =====
/**
* @notice Deposits `msg.value` into the Weth contract for Weth tokens.
* @return Whether or not ether was deposited into Weth.
*/
function _depositETH() internal returns (bool) {
if (msg.value > 0) {
_weth.deposit.value(msg.value)();
return true;
}
return false;
}
/**
* @notice Uses this contract's balance of Weth to withdraw Ether and send it to `getCaller()`.
*/
function _withdrawETH() internal returns (bool) {
uint256 quantity = IERC20(address(_weth)).balanceOf(address(this));
if (quantity > 0) {
// Withdraw ethers with weth.
_weth.withdraw(quantity);
// Send ether.
(bool success, ) = getCaller().call.value(quantity)("");
// Revert is call is unsuccessful.
require(success, "Connector: ERR_SENDING_ETHER");
return success;
}
return true;
}
/**
* @notice Calls the Router to pull `token` from the getCaller() and send them to this contract.
* @dev This eliminates the need for users to approve the Router and each connector.
* @param token The token to pull from `getCaller()` into this contract.
* @param quantity The amount of `token` to pull into this contract.
* @return Whether or not the `token` was transferred into this contract.
*/
function _transferFromCaller(address token, uint256 quantity)
internal
returns (bool)
{
if (quantity > 0) {
_primitiveRouter.transferFromCaller(token, quantity);
return true;
}
return false;
}
/**
* @notice Pushes this contract's balance of `token` to `getCaller()`.
* @dev getCaller() is the original `msg.sender` of the Router's `execute` fn.
* @param token The token to transfer to `getCaller()`.
* @return Whether or not the `token` was transferred to `getCaller()`.
*/
function _transferToCaller(address token) internal returns (bool) {
uint256 quantity = IERC20(token).balanceOf(address(this));
if (quantity > 0) {
IERC20(token).safeTransfer(getCaller(), quantity);
return true;
}
return false;
}
/**
* @notice Calls the Router to pull `token` from the getCaller() and send them to this contract.
* @dev This eliminates the need for users to approve the Router and each connector.
* @param token The token to pull from `getCaller()`.
* @param quantity The amount of `token` to pull.
* @param receiver The `to` address to send `quantity` of `token` to.
* @return Whether or not `token` was transferred to `receiver`.
*/
function _transferFromCallerToReceiver(
address token,
uint256 quantity,
address receiver
) internal returns (bool) {
if (quantity > 0) {
_primitiveRouter.transferFromCallerToReceiver(token, quantity, receiver);
return true;
}
return false;
}
/**
* @notice Uses this contract's balance of underlyingTokens to mint optionTokens to this contract.
* @param optionToken The Primitive Option to mint.
* @return (uint, uint) (longOptions, shortOptions)
*/
function _mintOptions(IOption optionToken) internal returns (uint256, uint256) {
address underlying = optionToken.getUnderlyingTokenAddress();
_transferBalanceToReceiver(underlying, address(optionToken)); // Sends to option contract
return optionToken.mintOptions(address(this));
}
/**
* @notice Uses this contract's balance of underlyingTokens to mint optionTokens to `receiver`.
* @param optionToken The Primitive Option to mint.
* @param receiver The address that will received the minted long and short optionTokens.
* @return (uint, uint) Returns the (long, short) option tokens minted
*/
function _mintOptionsToReceiver(IOption optionToken, address receiver)
internal
returns (uint256, uint256)
{
address underlying = optionToken.getUnderlyingTokenAddress();
_transferBalanceToReceiver(underlying, address(optionToken)); // Sends to option contract
return optionToken.mintOptions(receiver);
}
/**
* @notice Pulls underlying tokens from `getCaller()` to option contract, then invokes mintOptions().
* @param optionToken The option token to mint.
* @param quantity The amount of option tokens to mint.
* @return (uint, uint) Returns the (long, short) option tokens minted
*/
function _mintOptionsFromCaller(IOption optionToken, uint256 quantity)
internal
returns (uint256, uint256)
{
require(quantity > 0, "ERR_ZERO");
_transferFromCallerToReceiver(
optionToken.getUnderlyingTokenAddress(),
quantity,
address(optionToken)
);
return optionToken.mintOptions(address(this));
}
/**
* @notice Multi-step operation to close options.
* 1. Transfer balanceOf `redeem` option token to the option contract.
* 2. If NOT expired, pull `option` tokens from `getCaller()` and send to option contract.
* 3. Invoke `closeOptions()` to burn the options and release underlyings to this contract.
* @return The amount of underlyingTokens released to this contract.
*/
function _closeOptions(IOption optionToken) internal returns (uint256) {
address redeem = optionToken.redeemToken();
uint256 short = IERC20(redeem).balanceOf(address(this));
uint256 long = IERC20(address(optionToken)).balanceOf(getCaller());
uint256 proportional = CoreLib.getProportionalShortOptions(optionToken, long);
// IF user has more longs than proportional shorts, close the `short` amount.
if (proportional > short) {
proportional = short;
}
// If option is expired, transfer the amt of proportional thats larger.
if (optionToken.getExpiryTime() >= now) {
// Transfers the max proportional amount of short options to option contract.
IERC20(redeem).safeTransfer(address(optionToken), proportional);
// Pulls the max amount of long options and sends to option contract.
_transferFromCallerToReceiver(
address(optionToken),
CoreLib.getProportionalLongOptions(optionToken, proportional),
address(optionToken)
);
} else {
// If not expired, transfer all redeem in balance.
IERC20(redeem).safeTransfer(address(optionToken), short);
}
uint outputUnderlyings;
if(proportional > 0) {
(, , outputUnderlyings) = optionToken.closeOptions(address(this));
}
return outputUnderlyings;
}
/**
* @notice Multi-step operation to exercise options.
* 1. Transfer balanceOf `strike` token to option contract.
* 2. Transfer `amount` of options to exercise to option contract.
* 3. Invoke `exerciseOptions()` and specify `getCaller()` as the receiver.
* @dev If the balanceOf `strike` and `amount` of options are not in correct proportions, call will fail.
* @param optionToken The option to exercise.
* @param amount The quantity of options to exercise.
*/
function _exerciseOptions(IOption optionToken, uint256 amount)
internal
returns (uint256, uint256)
{
address strike = optionToken.getStrikeTokenAddress();
_transferBalanceToReceiver(strike, address(optionToken));
IERC20(address(optionToken)).safeTransfer(address(optionToken), amount);
return optionToken.exerciseOptions(getCaller(), amount, new bytes(0));
}
/**
* @notice Transfers this contract's balance of Redeem tokens and invokes the redemption function.
* @param optionToken The optionToken to redeem, not the redeem token itself.
*/
function _redeemOptions(IOption optionToken) internal returns (uint256) {
address redeem = optionToken.redeemToken();
_transferBalanceToReceiver(redeem, address(optionToken));
return optionToken.redeemStrikeTokens(getCaller());
}
/**
* @notice Utility function to transfer this contract's balance of `token` to `receiver`.
* @param token The token to transfer.
* @param receiver The address that receives the token.
* @return Returns the quantity of `token` transferred.
*/
function _transferBalanceToReceiver(address token, address receiver)
internal
returns (uint256)
{
uint256 quantity = IERC20(token).balanceOf(address(this));
IERC20(token).safeTransfer(receiver, quantity);
return quantity;
}
// ===== Fallback =====
receive() external payable {
assert(_msgSender() == address(_weth)); // only accept ETH via fallback from the WETH contract
}
// ===== View =====
/**
* @notice Returns the Weth contract address.
*/
function getWeth() public view override returns (IWETH) {
return _weth;
}
/**
* @notice Returns the state variable `_CALLER` in the Primitive Router.
*/
function getCaller() public view override returns (address) {
return _primitiveRouter.getCaller();
}
/**
* @notice Returns the Primitive Router contract address.
*/
function getPrimitiveRouter() public view override returns (IPrimitiveRouter) {
return _primitiveRouter;
}
/**
* @notice Returns whether or not `spender` is approved to spend `token`, from this contract.
*/
function isApproved(address token, address spender)
public
view
override
returns (bool)
{
return _approved[token][spender];
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Swaps Lib
* @author Primitive
* @notice Library for calculating different proportions of long and short option tokens.
* @dev @primitivefi/[email protected]
*/
import {IOption} from "@primitivefi/contracts/contracts/option/interfaces/ITrader.sol";
import {SafeMath} from "@openzeppelin/contracts/math/SafeMath.sol";
library CoreLib {
using SafeMath for uint256; // Reverts on math underflows/overflows
/**
* @dev Calculates the proportional quantity of long option tokens per short option token.
* @notice For each long option token, there is quoteValue / baseValue quantity of short option tokens.
* @param optionToken The Option to use to calculate proportional amounts. Each option has different proportions.
* @param short The amount of short options used to calculate the proportional amount of long option tokens.
* @return The proportional amount of long option tokens based on `short`.
*/
function getProportionalLongOptions(IOption optionToken, uint256 short)
internal
view
returns (uint256)
{
return short.mul(optionToken.getBaseValue()).div(optionToken.getQuoteValue());
}
/**
* @dev Calculates the proportional quantity of short option tokens per long option token.
* @notice For each short option token, there is baseValue / quoteValue quantity of long option tokens.
* @param optionToken The Option to use to calculate proportional amounts. Each option has different proportions.
* @param long The amount of long options used to calculate the proportional amount of short option tokens.
* @return The proportional amount of short option tokens based on `long`.
*/
function getProportionalShortOptions(IOption optionToken, uint256 long)
internal
view
returns (uint256)
{
return long.mul(optionToken.getQuoteValue()).div(optionToken.getBaseValue());
}
// 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");
}
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
import {IPrimitiveRouter} from "../interfaces/IPrimitiveRouter.sol";
import {IWETH} from "../interfaces/IWETH.sol";
interface IPrimitiveConnector {
// ===== External =====
function checkApproval(address token, address spender) external returns (bool);
// ===== View =====
function getWeth() external view returns (IWETH);
function getCaller() external view returns (address);
function getPrimitiveRouter() external view returns (IPrimitiveRouter);
function isApproved(address token, address spender) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @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);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.2;
import { IOption } from "./IOption.sol";
interface ITrader {
function safeMint(
IOption optionToken,
uint256 mintQuantity,
address receiver
) external returns (uint256, uint256);
function safeExercise(
IOption optionToken,
uint256 exerciseQuantity,
address receiver
) external returns (uint256, uint256);
function safeRedeem(
IOption optionToken,
uint256 redeemQuantity,
address receiver
) external returns (uint256);
function safeClose(
IOption optionToken,
uint256 closeQuantity,
address receiver
)
external
returns (
uint256,
uint256,
uint256
);
function safeUnwind(
IOption optionToken,
uint256 unwindQuantity,
address receiver
)
external
returns (
uint256,
uint256,
uint256
);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.2;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
interface IOption is IERC20 {
function mintOptions(address receiver) external returns (uint256, uint256);
function exerciseOptions(
address receiver,
uint256 outUnderlyings,
bytes calldata data
) external returns (uint256, uint256);
function redeemStrikeTokens(address receiver) external returns (uint256);
function closeOptions(address receiver)
external
returns (
uint256,
uint256,
uint256
);
function redeemToken() external view returns (address);
function getStrikeTokenAddress() external view returns (address);
function getUnderlyingTokenAddress() external view returns (address);
function getBaseValue() external view returns (uint256);
function getQuoteValue() external view returns (uint256);
function getExpiryTime() external view returns (uint256);
function underlyingCache() external view returns (uint256);
function strikeCache() external view returns (uint256);
function factory() external view returns (address);
function getCacheBalances() external view returns (uint256, uint256);
function getAssetAddresses()
external
view
returns (
address,
address,
address
);
function getParameters()
external
view
returns (
address _underlyingToken,
address _strikeToken,
address _redeemToken,
uint256 _base,
uint256 _quote,
uint256 _expiry
);
function initRedeemToken(address _redeemToken) external;
function updateCacheBalances() external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
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 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 { }
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
import {
IOption,
IERC20
} from "@primitivefi/contracts/contracts/option/interfaces/IOption.sol";
import {
IRegistry
} from "@primitivefi/contracts/contracts/option/interfaces/IRegistry.sol";
import {IWETH} from "./IWETH.sol";
interface IPrimitiveRouter {
// ===== Admin =====
function halt() external;
// ===== Registration =====
function setRegisteredOptions(address[] calldata optionAddresses)
external
returns (bool);
function setRegisteredConnectors(
address[] calldata connectors,
bool[] calldata isValid
) external returns (bool);
// ===== Operations =====
function transferFromCaller(address token, uint256 amount) external returns (bool);
function transferFromCallerToReceiver(
address token,
uint256 amount,
address receiver
) external returns (bool);
// ===== Execution =====
function executeCall(address connector, bytes calldata params) external payable;
// ==== View ====
function getWeth() external view returns (IWETH);
function getRoute() external view returns (address);
function getCaller() external view returns (address);
function getRegistry() external view returns (IRegistry);
function getRegisteredOption(address option) external view returns (bool);
function getRegisteredConnector(address connector) external view returns (bool);
function apiVersion() external pure returns (string memory);
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity >=0.5.0;
interface IWETH {
function deposit() external payable;
function transfer(address to, uint256 value) external returns (bool);
function withdraw(uint256) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.2;
interface IRegistry {
function pauseDeployments() external;
function unpauseDeployments() external;
function deployOption(
address underlyingToken,
address strikeToken,
uint256 base,
uint256 quote,
uint256 expiry
) external returns (address);
function setOptionFactory(address optionFactory_) external;
function setRedeemFactory(address redeemFactory_) external;
function optionFactory() external returns (address);
function redeemFactory() external returns (address);
function verifyToken(address tokenAddress) external;
function verifyExpiry(uint256 expiry) external;
function unverifyToken(address tokenAddress) external;
function unverifyExpiry(uint256 expiry) external;
function calculateOptionAddress(
address underlyingToken,
address strikeToken,
uint256 base,
uint256 quote,
uint256 expiry
) external view returns (address);
function getOptionAddress(
address underlyingToken,
address strikeToken,
uint256 base,
uint256 quote,
uint256 expiry
) external view returns (address);
function isVerifiedOption(address optionAddress)
external
view
returns (bool);
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Connector TEST
* @author Primitive
* @notice Low-level abstract contract for Primitive Connectors to inherit from.
* @dev @primitivefi/[email protected]
*/
import {PrimitiveConnector, IOption} from "../connectors/PrimitiveConnector.sol";
contract ConnectorTest is PrimitiveConnector {
event Log(address indexed caller);
constructor(address weth_, address primitiveRouter_)
public
PrimitiveConnector(weth_, primitiveRouter_)
{}
function depositETH() external payable returns (bool) {
emit Log(getCaller());
return _depositETH();
}
function withdrawETH() external returns (bool) {
emit Log(getCaller());
return _withdrawETH();
}
function transferFromCaller(address token, uint256 quantity) external returns (bool) {
emit Log(getCaller());
return _transferFromCaller(token, quantity);
}
function transferToCaller(address token) external returns (bool) {
emit Log(getCaller());
return _transferToCaller(token);
}
function transferFromCallerToReceiver(
address token,
uint256 quantity,
address receiver
) external returns (bool) {
emit Log(getCaller());
return _transferFromCallerToReceiver(token, quantity, receiver);
}
function mintOptions(IOption optionToken, uint256 quantity)
external
returns (uint256, uint256)
{
emit Log(getCaller());
_transferFromCaller(optionToken.getUnderlyingTokenAddress(), quantity);
return _mintOptions(optionToken);
}
function mintOptionsToReceiver(
IOption optionToken,
uint256 quantity,
address receiver
) external returns (uint256, uint256) {
emit Log(getCaller());
_transferFromCaller(optionToken.getUnderlyingTokenAddress(), quantity);
return _mintOptionsToReceiver(optionToken, receiver);
}
function mintOptionsFromCaller(IOption optionToken, uint256 quantity)
external
returns (uint256, uint256)
{
emit Log(getCaller());
return _mintOptionsFromCaller(optionToken, quantity);
}
function closeOptions(IOption optionToken, uint256 short) external returns (uint256) {
emit Log(getCaller());
_transferFromCaller(optionToken.redeemToken(), short);
return _closeOptions(optionToken);
}
function exerciseOptions(
IOption optionToken,
uint256 amount,
uint256 strikeAmount
) external returns (uint256, uint256) {
_transferFromCaller(optionToken.getStrikeTokenAddress(), strikeAmount);
_transferFromCaller(address(optionToken), amount);
emit Log(getCaller());
return _exerciseOptions(optionToken, amount);
}
function redeemOptions(IOption optionToken, uint256 short)
external
returns (uint256)
{
_transferFromCaller(optionToken.redeemToken(), short);
emit Log(getCaller());
return _redeemOptions(optionToken);
}
function transferBalanceToReceiver(address token, address receiver)
external
returns (uint256)
{
emit Log(getCaller());
return _transferBalanceToReceiver(token, receiver);
}
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Router
* @author Primitive
* @notice Swap option tokens on Uniswap & Sushiswap venues.
* @dev @primitivefi/[email protected]
*/
// Open Zeppelin
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
// Uniswap
import {
IUniswapV2Callee
} from "@uniswap/v2-core/contracts/interfaces/IUniswapV2Callee.sol";
// Primitive
import {
IPrimitiveSwaps,
IUniswapV2Router02,
IUniswapV2Factory,
IUniswapV2Pair,
IOption,
IERC20Permit
} from "../interfaces/IPrimitiveSwaps.sol";
import {PrimitiveConnector} from "./PrimitiveConnector.sol";
import {SwapsLib, SafeMath} from "../libraries/SwapsLib.sol";
interface DaiPermit {
function permit(
address holder,
address spender,
uint256 nonce,
uint256 expiry,
bool allowed,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
contract PrimitiveSwaps is
PrimitiveConnector,
IPrimitiveSwaps,
IUniswapV2Callee,
ReentrancyGuard
{
using SafeERC20 for IERC20; // Reverts when `transfer` or `transferFrom` erc20 calls don't return proper data
using SafeMath for uint256; // Reverts on math underflows/overflows
event Initialized(address indexed from); // Emitted on deployment.
event Buy(
address indexed from,
address indexed option,
uint256 quantity,
uint256 premium
);
event Sell(
address indexed from,
address indexed option,
uint256 quantity,
uint256 payout
);
IUniswapV2Factory private _factory; // The Uniswap V2 _factory contract to get pair addresses from
IUniswapV2Router02 private _router; // The Uniswap contract used to interact with the protocol
modifier onlySelf() {
require(_msgSender() == address(this), "PrimitiveSwaps: NOT_SELF");
_;
}
// ===== Constructor =====
constructor(
address weth_,
address primitiveRouter_,
address factory_,
address router_
) public PrimitiveConnector(weth_, primitiveRouter_) {
_factory = IUniswapV2Factory(factory_);
_router = IUniswapV2Router02(router_);
emit Initialized(_msgSender());
}
// ===== Swap Operations =====
/**
* @notice IMPORTANT: amountOutMin parameter is the price to swap shortOptionTokens to underlyingTokens.
* IMPORTANT: If the ratio between shortOptionTokens and underlyingTokens is 1:1, then only the swap fee (0.30%) has to be paid.
* @dev Opens a longOptionToken position by minting long + short tokens, then selling the short tokens.
* @param optionToken The option address.
* @param amountOptions The quantity of longOptionTokens to purchase.
* @param maxPremium The maximum quantity of underlyingTokens to pay for the optionTokens.
* @return Whether or not the call succeeded.
*/
function openFlashLong(
IOption optionToken,
uint256 amountOptions,
uint256 maxPremium
) public override nonReentrant onlyRegistered(optionToken) returns (bool) {
// Calls pair.swap(), and executes `flashMintShortOptionsThenSwap` in the `uniswapV2Callee` callback.
(IUniswapV2Pair pair, address underlying, ) = getOptionPair(optionToken);
SwapsLib._flashSwap(
pair, // Pair to flash swap from.
underlying, // Token to swap to, i.e. receive optimistically.
amountOptions, // Amount of underlying to optimistically receive to mint options with.
abi.encodeWithSelector( // Start: Function to call in the callback.
bytes4(
keccak256(
bytes("flashMintShortOptionsThenSwap(address,uint256,uint256)")
)
),
optionToken, // Option token to mint with flash loaned tokens.
amountOptions, // Quantity of underlyingTokens from flash loan to use to mint options.
maxPremium // Total price paid (in underlyingTokens) for selling shortOptionTokens.
) // End: Function to call in the callback.
);
return true;
}
/**
* @notice Executes the same as `openFlashLong`, but calls `permit` to pull underlying tokens.
*/
function openFlashLongWithPermit(
IOption optionToken,
uint256 amountOptions,
uint256 maxPremium,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public override nonReentrant onlyRegistered(optionToken) returns (bool) {
// Calls pair.swap(), and executes `flashMintShortOptionsThenSwap` in the `uniswapV2Callee` callback.
(IUniswapV2Pair pair, address underlying, ) = getOptionPair(optionToken);
IERC20Permit(underlying).permit(
getCaller(),
address(_primitiveRouter),
maxPremium,
deadline,
v,
r,
s
);
SwapsLib._flashSwap(
pair, // Pair to flash swap from.
underlying, // Token to swap to, i.e. receive optimistically.
amountOptions, // Amount of underlying to optimistically receive to mint options with.
abi.encodeWithSelector( // Start: Function to call in the callback.
bytes4(
keccak256(
bytes("flashMintShortOptionsThenSwap(address,uint256,uint256)")
)
),
optionToken, // Option token to mint with flash loaned tokens.
amountOptions, // Quantity of underlyingTokens from flash loan to use to mint options.
maxPremium // Total price paid (in underlyingTokens) for selling shortOptionTokens.
) // End: Function to call in the callback.
);
return true;
}
/**
* @notice Executes the same as `openFlashLongWithPermit`, but for DAI.
*/
function openFlashLongWithDAIPermit(
IOption optionToken,
uint256 amountOptions,
uint256 maxPremium,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public override nonReentrant onlyRegistered(optionToken) returns (bool) {
// Calls pair.swap(), and executes `flashMintShortOptionsThenSwap` in the `uniswapV2Callee` callback.
(IUniswapV2Pair pair, address underlying, ) = getOptionPair(optionToken);
DaiPermit(underlying).permit(
getCaller(),
address(_primitiveRouter),
IERC20Permit(underlying).nonces(getCaller()),
deadline,
true,
v,
r,
s
);
SwapsLib._flashSwap(
pair, // Pair to flash swap from.
underlying, // Token to swap to, i.e. receive optimistically.
amountOptions, // Amount of underlying to optimistically receive to mint options with.
abi.encodeWithSelector( // Start: Function to call in the callback.
bytes4(
keccak256(
bytes("flashMintShortOptionsThenSwap(address,uint256,uint256)")
)
),
optionToken, // Option token to mint with flash loaned tokens.
amountOptions, // Quantity of underlyingTokens from flash loan to use to mint options.
maxPremium // Total price paid (in underlyingTokens) for selling shortOptionTokens.
) // End: Function to call in the callback.
);
return true;
}
/**
* @notice Uses Ether to pay to purchase the option tokens.
* IMPORTANT: amountOutMin parameter is the price to swap shortOptionTokens to underlyingTokens.
* IMPORTANT: If the ratio between shortOptionTokens and underlyingTokens is 1:1, then only the swap fee (0.30%) has to be paid.
* @dev Opens a longOptionToken position by minting long + short tokens, then selling the short tokens.
* @param optionToken The option address.
* @param amountOptions The quantity of longOptionTokens to purchase.
*/
function openFlashLongWithETH(IOption optionToken, uint256 amountOptions)
external
payable
override
nonReentrant
onlyRegistered(optionToken)
returns (bool)
{
require(msg.value > 0, "PrimitiveSwaps: ZERO"); // Fail early if no Ether was sent.
// Calls pair.swap(), and executes `flashMintShortOptionsThenSwap` in the `uniswapV2Callee` callback.
(IUniswapV2Pair pair, address underlying, ) = getOptionPair(optionToken);
SwapsLib._flashSwap(
pair, // Pair to flash swap from.
underlying, // Token to swap to, i.e. receive optimistically.
amountOptions, // Amount of underlying to optimistically receive to mint options with.
abi.encodeWithSelector( // Start: Function to call in the callback.
bytes4(
keccak256(
bytes(
"flashMintShortOptionsThenSwapWithETH(address,uint256,uint256)"
)
)
),
optionToken, // Option token to mint with flash loaned tokens
amountOptions, // Quantity of underlyingTokens from flash loan to use to mint options.
msg.value // total price paid (in underlyingTokens) for selling shortOptionTokens.
) // End: Function to call in the callback.
);
return true;
}
/**
* @dev Closes a longOptionToken position by flash swapping in redeemTokens,
* closing the option, and paying back in underlyingTokens.
* @notice IMPORTANT: If minPayout is 0, this function will cost the caller to close the option, for no gain.
* @param optionToken The address of the longOptionTokens to close.
* @param amountRedeems The quantity of redeemTokens to borrow to close the options.
* @param minPayout The minimum payout of underlyingTokens sent out to the user.
*/
function closeFlashLong(
IOption optionToken,
uint256 amountRedeems,
uint256 minPayout
) external override nonReentrant onlyRegistered(optionToken) returns (bool) {
// Calls pair.swap(), and executes `flashCloseLongOptionsThenSwap` in the `uniswapV2Callee` callback.
(IUniswapV2Pair pair, , address redeem) = getOptionPair(optionToken);
SwapsLib._flashSwap(
pair, // Pair to flash swap from.
redeem, // Token to swap to, i.e. receive optimistically.
amountRedeems, // Amount of underlying to optimistically receive to close options with.
abi.encodeWithSelector( // Start: Function to call in the callback.
bytes4(
keccak256(
bytes("flashCloseLongOptionsThenSwap(address,uint256,uint256)")
)
),
optionToken, // Option token to close with flash loaned redeemTokens.
amountRedeems, // Quantity of redeemTokens from flash loan to use to close options.
minPayout // Total remaining underlyingTokens after flash loan is paid.
) // End: Function to call in the callback.
);
return true;
}
/**
* @dev Closes a longOptionToken position by flash swapping in redeemTokens,
* closing the option, and paying back in underlyingTokens.
* @notice IMPORTANT: If minPayout is 0, this function will cost the caller to close the option, for no gain.
* @param optionToken The address of the longOptionTokens to close.
* @param amountRedeems The quantity of redeemTokens to borrow to close the options.
* @param minPayout The minimum payout of underlyingTokens sent out to the user.
*/
function closeFlashLongForETH(
IOption optionToken,
uint256 amountRedeems,
uint256 minPayout
) external override nonReentrant onlyRegistered(optionToken) returns (bool) {
// Calls pair.swap(), and executes `flashCloseLongOptionsThenSwapForETH` in the `uniswapV2Callee` callback.
(IUniswapV2Pair pair, , address redeem) = getOptionPair(optionToken);
SwapsLib._flashSwap(
pair, // Pair to flash swap from.
redeem, // Token to swap to, i.e. receive optimistically.
amountRedeems, // Amount of underlying to optimistically receive to close options with.
abi.encodeWithSelector( // Start: Function to call in the callback.
bytes4(
keccak256(
bytes(
"flashCloseLongOptionsThenSwapForETH(address,uint256,uint256)"
)
)
),
optionToken, // Option token to close with flash loaned redeemTokens.
amountRedeems, // Quantity of redeemTokens from flash loan to use to close options.
minPayout // Total remaining underlyingTokens after flash loan is paid.
) // End: Function to call in the callback.
);
return true;
}
// ===== Flash Callback Functions =====
/**
* @notice Callback function executed in a UniswapV2Pair.swap() call for `openFlashLong`.
* @dev Pays underlying token `premium` for `quantity` of `optionAddress` tokens.
* @param optionAddress The address of the Option contract.
* @param quantity The quantity of options to mint using borrowed underlyingTokens.
* @param maxPremium The maximum quantity of underlyingTokens to pay for the optionTokens.
* @return Returns (amount, premium) of options purchased for total premium price.
*/
function flashMintShortOptionsThenSwap(
address optionAddress,
uint256 quantity,
uint256 maxPremium
) public onlySelf onlyRegistered(IOption(optionAddress)) returns (uint256, uint256) {
IOption optionToken = IOption(optionAddress);
(IUniswapV2Pair pair, address underlying, address redeem) =
getOptionPair(optionToken);
// Mint option and redeem tokens to this contract.
_mintOptions(optionToken);
// Get the repayment amounts.
(uint256 premium, uint256 redeemPremium) =
SwapsLib.repayOpen(_router, optionToken, quantity);
// If premium is non-zero and non-negative (most cases), send underlyingTokens to the pair as payment (premium).
if (premium > 0) {
// Check for users to not pay over their max desired value.
require(maxPremium >= premium, "PrimitiveSwaps: MAX_PREMIUM");
// Pull underlyingTokens from the `getCaller()` to pay the remainder of the flash swap.
// Push underlying tokens back to the pair as repayment.
_transferFromCallerToReceiver(underlying, premium, address(pair));
}
// Pay pair in redeem tokens.
if (redeemPremium > 0) {
IERC20(redeem).safeTransfer(address(pair), redeemPremium);
}
// Return tokens to `getCaller()`.
_transferToCaller(redeem);
_transferToCaller(optionAddress);
emit Buy(getCaller(), optionAddress, quantity, premium);
return (quantity, premium);
}
/**
* @notice Callback function executed in a UniswapV2Pair.swap() call for `openFlashLongWithETH`.
* @dev Pays `premium` in ether for `quantity` of `optionAddress` tokens.
* @param optionAddress The address of the Option contract.
* @param quantity The quantity of options to mint using borrowed underlyingTokens.
* @param maxPremium The maximum quantity of underlyingTokens to pay for the optionTokens.
* @return Returns (amount, premium) of options purchased for total premium price.
*/
function flashMintShortOptionsThenSwapWithETH(
address optionAddress,
uint256 quantity,
uint256 maxPremium
) public onlySelf onlyRegistered(IOption(optionAddress)) returns (uint256, uint256) {
IOption optionToken = IOption(optionAddress);
(IUniswapV2Pair pair, address underlying, address redeem) =
getOptionPair(optionToken);
require(underlying == address(_weth), "PrimitiveSwaps: NOT_WETH"); // Ensure Weth Call.
// Mint option and redeem tokens to this contract.
_mintOptions(optionToken);
// Get the repayment amounts.
(uint256 premium, uint256 redeemPremium) =
SwapsLib.repayOpen(_router, optionToken, quantity);
// If premium is non-zero and non-negative (most cases), send underlyingTokens to the pair as payment (premium).
if (premium > 0) {
// Check for users to not pay over their max desired value.
require(maxPremium >= premium, "PrimitiveSwaps: MAX_PREMIUM");
// Wrap exact Ether amount of `premium`.
_weth.deposit.value(premium)();
// Transfer Weth to pair to pay for premium.
IERC20(address(_weth)).safeTransfer(address(pair), premium);
// Return remaining Ether to caller.
_withdrawETH();
}
// Pay pair in redeem.
if (redeemPremium > 0) {
IERC20(redeem).safeTransfer(address(pair), redeemPremium);
}
// Return tokens to `getCaller()`.
_transferToCaller(redeem);
_transferToCaller(optionAddress);
emit Buy(getCaller(), optionAddress, quantity, premium);
return (quantity, premium);
}
/**
* @dev Sends shortOptionTokens to _msgSender(), and pays back the UniswapV2Pair in underlyingTokens.
* @notice IMPORTANT: If minPayout is 0, the `to` address is liable for negative payouts *if* that occurs.
* @param optionAddress The address of the longOptionTokes to close.
* @param flashLoanQuantity The quantity of shortOptionTokens borrowed to use to close longOptionTokens.
* @param minPayout The minimum payout of underlyingTokens sent to the `to` address.
*/
function flashCloseLongOptionsThenSwap(
address optionAddress,
uint256 flashLoanQuantity,
uint256 minPayout
) public onlySelf onlyRegistered(IOption(optionAddress)) returns (uint256, uint256) {
IOption optionToken = IOption(optionAddress);
(IUniswapV2Pair pair, address underlying, address redeem) =
getOptionPair(optionToken);
// Close the options, releasing underlying tokens to this contract.
uint256 outputUnderlyings = _closeOptions(optionToken);
// Get repay amounts.
(uint256 payout, uint256 cost, uint256 outstanding) =
SwapsLib.repayClose(_router, optionToken, flashLoanQuantity);
if (payout > 0) {
cost = outputUnderlyings.sub(payout);
}
// Pay back the pair in underlyingTokens.
if (cost > 0) {
IERC20(underlying).safeTransfer(address(pair), cost);
}
if (outstanding > 0) {
// Pull underlyingTokens from the `getCaller()` to pay the remainder of the flash swap.
// Revert if the minPayout is less than or equal to the underlyingPayment of 0.
// There is 0 underlyingPayment in the case that outstanding > 0.
// This code branch can be successful by setting `minPayout` to 0.
// This means the user is willing to pay to close the position.
require(minPayout <= payout, "PrimitiveSwaps: NEGATIVE_PAYOUT");
_transferFromCallerToReceiver(underlying, outstanding, address(pair));
}
// If payout is non-zero and non-negative, send it to the `getCaller()` address.
if (payout > 0) {
// Revert if minPayout is greater than the actual payout.
require(payout >= minPayout, "PrimitiveSwaps: MIN_PREMIUM");
_transferToCaller(underlying);
}
emit Sell(getCaller(), optionAddress, flashLoanQuantity, payout);
return (payout, cost);
}
/**
* @dev Sends shortOptionTokens to _msgSender(), and pays back the UniswapV2Pair in underlyingTokens.
* @notice IMPORTANT: If minPayout is 0, the `getCaller()` address is liable for negative payouts *if* that occurs.
* @param optionAddress The address of the longOptionTokes to close.
* @param flashLoanQuantity The quantity of shortOptionTokens borrowed to use to close longOptionTokens.
* @param minPayout The minimum payout of underlyingTokens sent to the `to` address.
*/
function flashCloseLongOptionsThenSwapForETH(
address optionAddress,
uint256 flashLoanQuantity,
uint256 minPayout
) public onlySelf onlyRegistered(IOption(optionAddress)) returns (uint256, uint256) {
IOption optionToken = IOption(optionAddress);
(IUniswapV2Pair pair, address underlying, address redeem) =
getOptionPair(optionToken);
require(underlying == address(_weth), "PrimitiveSwaps: NOT_WETH");
// Close the options, releasing underlying tokens to this contract.
_closeOptions(optionToken);
// Get repay amounts.
(uint256 payout, uint256 cost, uint256 outstanding) =
SwapsLib.repayClose(_router, optionToken, flashLoanQuantity);
// Pay back the pair in underlyingTokens.
if (cost > 0) {
IERC20(underlying).safeTransfer(address(pair), cost);
}
if (outstanding > 0) {
// Pull underlyingTokens from the `getCaller()` to pay the remainder of the flash swap.
// Revert if the minPayout is less than or equal to the underlyingPayment of 0.
// There is 0 underlyingPayment in the case that outstanding > 0.
// This code branch can be successful by setting `minPayout` to 0.
// This means the user is willing to pay to close the position.
require(minPayout <= payout, "PrimitiveSwaps: NEGATIVE_PAYOUT");
_transferFromCallerToReceiver(underlying, outstanding, address(pair));
}
// If payout is non-zero and non-negative, send it to the `getCaller()` address.
if (payout > 0) {
// Revert if minPayout is greater than the actual payout.
require(payout >= minPayout, "PrimitiveSwaps: MIN_PREMIUM");
_withdrawETH(); // Unwrap's this contract's balance of Weth and sends Ether to `getCaller()`.
}
emit Sell(getCaller(), optionAddress, flashLoanQuantity, payout);
return (payout, cost);
}
// ===== Flash Loans =====
/**
* @dev The callback function triggered in a UniswapV2Pair.swap() call when the `data` parameter has data.
* @param sender The original _msgSender() of the UniswapV2Pair.swap() call.
* @param amount0 The quantity of token0 received to the `to` address in the swap() call.
* @param amount1 The quantity of token1 received to the `to` address in the swap() call.
* @param data The payload passed in the `data` parameter of the swap() call.
*/
function uniswapV2Call(
address sender,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external override(IPrimitiveSwaps, IUniswapV2Callee) {
assert(
_msgSender() ==
_factory.getPair(
IUniswapV2Pair(_msgSender()).token0(),
IUniswapV2Pair(_msgSender()).token1()
)
); // Ensure that _msgSender() is actually a V2 pair.
require(sender == address(this), "PrimitiveSwaps: NOT_SENDER"); // Ensure called by this contract.
(bool success, bytes memory returnData) = address(this).call(data); // Execute the callback.
(uint256 amountA, uint256 amountB) = abi.decode(returnData, (uint256, uint256));
require(
success && (returnData.length == 0 || amountA > 0 || amountB > 0),
"PrimitiveSwaps: CALLBACK"
);
}
// ===== View =====
/**
* @notice Gets the UniswapV2Router02 contract address.
*/
function getRouter() public view override returns (IUniswapV2Router02) {
return _router;
}
/**
* @notice Gets the UniswapV2Factory contract address.
*/
function getFactory() public view override returns (IUniswapV2Factory) {
return _factory;
}
/**
* @notice Fetchs the Uniswap Pair for an option's redeemToken and underlyingToken params.
* @param option The option token to get the corresponding UniswapV2Pair market.
* @return The pair address, as well as the tokens of the pair.
*/
function getOptionPair(IOption option)
public
view
override
returns (
IUniswapV2Pair,
address,
address
)
{
address redeem = option.redeemToken();
address underlying = option.getUnderlyingTokenAddress();
IUniswapV2Pair pair = IUniswapV2Pair(_factory.getPair(redeem, underlying));
return (pair, underlying, redeem);
}
/**
* @dev Calculates the effective premium, denominated in underlyingTokens, to buy `quantity` of `optionToken`s.
* @notice UniswapV2 adds a 0.3009027% fee which is applied to the premium as 0.301%.
* IMPORTANT: If the pair's reserve ratio is incorrect, there could be a 'negative' premium.
* Buying negative premium options will pay out redeemTokens.
* An 'incorrect' ratio occurs when the (reserves of redeemTokens / strike ratio) >= reserves of underlyingTokens.
* Implicitly uses the `optionToken`'s underlying and redeem tokens for the pair.
* @param optionToken The optionToken to get the premium cost of purchasing.
* @param quantity The quantity of long option tokens that will be purchased.
* @return (uint, uint) Returns the `premium` to buy `quantity` of `optionToken` and the `negativePremium`.
*/
function getOpenPremium(IOption optionToken, uint256 quantity)
public
view
override
returns (uint256, uint256)
{
return SwapsLib.getOpenPremium(_router, optionToken, quantity);
}
/**
* @dev Calculates the effective premium, denominated in underlyingTokens, to sell `optionToken`s.
* @param optionToken The optionToken to get the premium cost of purchasing.
* @param quantity The quantity of short option tokens that will be closed.
* @return (uint, uint) Returns the `premium` to sell `quantity` of `optionToken` and the `negativePremium`.
*/
function getClosePremium(IOption optionToken, uint256 quantity)
public
view
override
returns (uint256, uint256)
{
return SwapsLib.getClosePremium(_router, optionToken, quantity);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
pragma solidity >=0.5.0;
interface IUniswapV2Callee {
function uniswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
import {
IUniswapV2Router02
} from "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import {
IUniswapV2Factory
} from "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import {IUniswapV2Pair} from "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
import {IOption} from "@primitivefi/contracts/contracts/option/interfaces/IOption.sol";
import {IERC20Permit} from "./IERC20Permit.sol";
interface IPrimitiveSwaps {
// ==== External Functions ====
function openFlashLong(
IOption optionToken,
uint256 amountOptions,
uint256 maxPremium
) external returns (bool);
function openFlashLongWithPermit(
IOption optionToken,
uint256 amountOptions,
uint256 maxPremium,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external returns (bool);
function openFlashLongWithDAIPermit(
IOption optionToken,
uint256 amountOptions,
uint256 maxPremium,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external returns (bool);
function openFlashLongWithETH(IOption optionToken, uint256 amountOptions)
external
payable
returns (bool);
function closeFlashLong(
IOption optionToken,
uint256 amountRedeems,
uint256 minPayout
) external returns (bool);
function closeFlashLongForETH(
IOption optionToken,
uint256 amountRedeems,
uint256 minPayout
) external returns (bool);
// ===== Callback =====
function uniswapV2Call(
address sender,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external;
// ==== View ====
function getRouter() external view returns (IUniswapV2Router02);
function getFactory() external view returns (IUniswapV2Factory);
function getOptionPair(IOption option)
external
view
returns (
IUniswapV2Pair,
address,
address
);
function getOpenPremium(IOption optionToken, uint256 quantity)
external
view
returns (uint256, uint256);
function getClosePremium(IOption optionToken, uint256 quantity)
external
view
returns (uint256, uint256);
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Swaps Lib
* @author Primitive
* @notice Library for Swap Logic for Uniswap AMM.
* @dev @primitivefi/[email protected]
*/
import {
IUniswapV2Router02
} from "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import {IUniswapV2Pair} from "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
import {CoreLib, IOption, SafeMath} from "./CoreLib.sol";
library SwapsLib {
using SafeMath for uint256; // Reverts on math underflows/overflows
/**
* @notice Passes in `params` to the UniswapV2Pair.swap() function to trigger the callback.
* @param pair The Uniswap Pair to call.
* @param token The token in the Pair to swap to, and thus optimistically receive.
* @param amount The quantity of `token`s to optimistically receive first.
* @param params The data to call from this contract, using the `uniswapV2Callee` callback.
* @return Whether or not the swap() call suceeded.
*/
function _flashSwap(
IUniswapV2Pair pair,
address token,
uint256 amount,
bytes memory params
) internal returns (bool) {
// Receives `amount` of `token` to this contract address.
uint256 amount0Out = pair.token0() == token ? amount : 0;
uint256 amount1Out = pair.token0() == token ? 0 : amount;
// Execute the callback function in params.
pair.swap(amount0Out, amount1Out, address(this), params);
return true;
}
/**
* @notice Gets the amounts to pay out, pay back, and outstanding cost.
* @param router The UniswapV2Router02 to use for calculating `amountsOut`.
* @param optionToken The option token to use for fetching its corresponding Uniswap Pair.
* @param redeemAmount The quantity of REDEEM tokens, with `quoteValue` units, needed to close the options.
*/
function repayClose(
IUniswapV2Router02 router,
IOption optionToken,
uint256 redeemAmount
)
internal
view
returns (
uint256,
uint256,
uint256
)
{
// Outstanding is the cost remaining, should be 0 in most cases.
// Payout is the `premium` that the original caller receives in underlyingTokens.
(uint256 payout, uint256 outstanding) =
getClosePremium(router, optionToken, redeemAmount);
// In most cases there will be an underlying payout, which is subtracted from the redeemAmount.
uint256 cost = CoreLib.getProportionalLongOptions(optionToken, redeemAmount);
if (payout > 0) {
cost = cost.sub(payout);
}
return (payout, cost, outstanding);
}
/**
* @notice Returns the swap amounts required to return to repay the flash loan used to open a long position.
* @param router The UniswapV2Router02 to use for calculating `amountsOut`.
* @param optionToken The option token to use for fetching its corresponding Uniswap Pair.
* @param underlyingAmount The quantity of UNDERLYING tokens, with `baseValue` units, needed to open the options.
*/
function repayOpen(
IUniswapV2Router02 router,
IOption optionToken,
uint256 underlyingAmount
) internal view returns (uint256, uint256) {
// Premium is the `underlyingTokens` required to buy the `optionToken`.
// ExtraRedeems is the `redeemTokens` that are remaining.
// If `premium` is not 0, `extraRedeems` should be 0, else `extraRedeems` is the payout (a negative premium).
(uint256 premium, uint256 extraRedeems) =
getOpenPremium(router, optionToken, underlyingAmount);
uint256 redeemPremium =
CoreLib.getProportionalShortOptions(optionToken, underlyingAmount);
if (extraRedeems > 0) {
redeemPremium = redeemPremium.sub(extraRedeems);
}
return (premium, redeemPremium);
}
/**
* @dev Calculates the effective premium, denominated in underlyingTokens, to buy `quantity` of `optionToken`s.
* @notice UniswapV2 adds a 0.3009027% fee which is applied to the premium as 0.301%.
* IMPORTANT: If the pair's reserve ratio is incorrect, there could be a 'negative' premium.
* Buying negative premium options will pay out redeemTokens.
* An 'incorrect' ratio occurs when the (reserves of redeemTokens / strike ratio) >= reserves of underlyingTokens.
* Implicitly uses the `optionToken`'s underlying and redeem tokens for the pair.
* @param router The UniswapV2Router02 contract.
* @param optionToken The optionToken to get the premium cost of purchasing.
* @param quantity The quantity of long option tokens that will be purchased.
*/
function getOpenPremium(
IUniswapV2Router02 router,
IOption optionToken,
uint256 quantity
)
internal
view
returns (
/* override */
uint256,
uint256
)
{
// longOptionTokens are opened by doing a swap from redeemTokens to underlyingTokens effectively.
address[] memory path = new address[](2);
path[0] = optionToken.redeemToken();
path[1] = optionToken.getUnderlyingTokenAddress();
// `quantity` of underlyingTokens are output from the swap.
// They are used to mint options, which will mint `quantity` * quoteValue / baseValue amount of redeemTokens.
uint256 redeemsMinted =
CoreLib.getProportionalShortOptions(optionToken, quantity);
// The loanRemainderInUnderlyings will be the amount of underlyingTokens that are needed from the original
// transaction caller in order to pay the flash swap.
// IMPORTANT: THIS IS EFFECTIVELY THE PREMIUM PAID IN UNDERLYINGTOKENS TO PURCHASE THE OPTIONTOKEN.
uint256 loanRemainderInUnderlyings;
// Economically, negativePremiumPaymentInRedeems value should always be 0.
// In the case that we minted more redeemTokens than are needed to pay back the flash swap,
// (short -> underlying is a positive trade), there is an effective negative premium.
// In that case, this function will send out `negativePremiumAmount` of redeemTokens to the original caller.
// This means the user gets to keep the extra redeemTokens for free.
// Negative premium amount is the opposite difference of the loan remainder: (paid - flash loan amount)
uint256 negativePremiumPaymentInRedeems;
// Since the borrowed amount is underlyingTokens, and we are paying back in redeemTokens,
// we need to see how much redeemTokens must be returned for the borrowed amount.
// We can find that value by doing the normal swap math, getAmountsIn will give us the amount
// of redeemTokens are needed for the output amount of the flash loan.
// IMPORTANT: amountsIn[0] is how many short tokens we need to pay back.
// This value is most likely greater than the amount of redeemTokens minted.
uint256[] memory amountsIn = router.getAmountsIn(quantity, path);
uint256 redeemsRequired = amountsIn[0]; // the amountIn of redeemTokens based on the amountOut of `quantity`.
// If redeemsMinted is greater than redeems required, there is a cost of 0, implying a negative premium.
uint256 redeemCostRemaining =
redeemsRequired > redeemsMinted ? redeemsRequired.sub(redeemsMinted) : 0;
// If there is a negative premium, calculate the quantity of remaining redeemTokens after the `redeemsMinted` is spent.
negativePremiumPaymentInRedeems = redeemsMinted > redeemsRequired
? redeemsMinted.sub(redeemsRequired)
: 0;
// In most cases, there will be an outstanding cost (assuming we minted less redeemTokens than the
// required amountIn of redeemTokens for the swap).
if (redeemCostRemaining > 0) {
// The user won't want to pay back the remaining cost in redeemTokens,
// because they borrowed underlyingTokens to mint them in the first place.
// So instead, we get the quantity of underlyingTokens that could be paid instead.
// We can calculate this using normal swap math.
// getAmountsOut will return the quantity of underlyingTokens that are output,
// based on some input of redeemTokens.
// The input redeemTokens is the remaining redeemToken cost, and the output
// underlyingTokens is the proportional amount of underlyingTokens.
// amountsOut[1] is then the outstanding flash loan value denominated in underlyingTokens.
uint256[] memory amountsOut = router.getAmountsOut(redeemCostRemaining, path);
// Returning withdrawn tokens to the pair has a fee of .003 / .997 = 0.3009027% which must be applied.
loanRemainderInUnderlyings = (
amountsOut[1].mul(100000).add(amountsOut[1].mul(301))
)
.div(100000);
}
return (loanRemainderInUnderlyings, negativePremiumPaymentInRedeems);
}
/**
* @dev Calculates the effective premium, denominated in underlyingTokens, to sell `optionToken`s.
* @param router The UniswapV2Router02 contract.
* @param optionToken The optionToken to get the premium cost of purchasing.
* @param quantity The quantity of short option tokens that will be closed.
*/
function getClosePremium(
IUniswapV2Router02 router,
IOption optionToken,
uint256 quantity
)
internal
view
returns (
/* override */
uint256,
uint256
)
{
// longOptionTokens are closed by doing a swap from underlyingTokens to redeemTokens.
address[] memory path = new address[](2);
path[0] = optionToken.getUnderlyingTokenAddress();
path[1] = optionToken.redeemToken();
uint256 outputUnderlyings =
CoreLib.getProportionalLongOptions(optionToken, quantity);
// The loanRemainder will be the amount of underlyingTokens that are needed from the original
// transaction caller in order to pay the flash swap.
uint256 loanRemainder;
// Economically, underlyingPayout value should always be greater than 0, or this trade shouldn't be made.
// If an underlyingPayout is greater than 0, it means that the redeemTokens borrowed are worth less than the
// underlyingTokens received from closing the redeemToken<>optionTokens.
// If the redeemTokens are worth more than the underlyingTokens they are entitled to,
// then closing the redeemTokens will cost additional underlyingTokens. In this case,
// the transaction should be reverted. Or else, the user is paying extra at the expense of
// rebalancing the pool.
uint256 underlyingPayout;
// Since the borrowed amount is redeemTokens, and we are paying back in underlyingTokens,
// we need to see how much underlyingTokens must be returned for the borrowed amount.
// We can find that value by doing the normal swap math, getAmountsIn will give us the amount
// of underlyingTokens are needed for the output amount of the flash loan.
// IMPORTANT: amountsIn 0 is how many underlyingTokens we need to pay back.
// This value is most likely greater than the amount of underlyingTokens received from closing.
uint256[] memory amountsIn = router.getAmountsIn(quantity, path);
uint256 underlyingsRequired = amountsIn[0]; // the amountIn required of underlyingTokens based on the amountOut of flashloanQuantity
// If outputUnderlyings (received from closing) is greater than underlyings required,
// there is a positive payout.
underlyingPayout = outputUnderlyings > underlyingsRequired
? outputUnderlyings.sub(underlyingsRequired)
: 0;
// If there is a negative payout, calculate the remaining cost of underlyingTokens.
uint256 underlyingCostRemaining =
underlyingsRequired > outputUnderlyings
? underlyingsRequired.sub(outputUnderlyings)
: 0;
// In the case that there is a negative payout (additional underlyingTokens are required),
// get the remaining cost into the `loanRemainder` variable and also check to see
// if a user is willing to pay the negative cost. There is no rational economic incentive for this.
if (underlyingCostRemaining > 0) {
loanRemainder = underlyingCostRemaining;
}
return (underlyingPayout, loanRemainder);
}
}
pragma solidity >=0.6.2;
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;
}
pragma solidity >=0.5.0;
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 getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
pragma solidity >=0.5.0;
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 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;
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity >=0.5.0;
interface IERC20Permit {
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
function nonces(address owner) external view returns (uint256);
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Liquidity
* @author Primitive
* @notice Manage liquidity on Uniswap & Sushiswap Venues.
* @dev @primitivefi/[email protected]
*/
// Open Zeppelin
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
// Interfaces
import {
IPrimitiveLiquidity,
IUniswapV2Router02,
IUniswapV2Factory,
IUniswapV2Pair,
IERC20Permit,
IOption
} from "../interfaces/IPrimitiveLiquidity.sol";
// Primitive
import {PrimitiveConnector} from "./PrimitiveConnector.sol";
import {CoreLib, SafeMath} from "../libraries/CoreLib.sol";
interface DaiPermit {
function permit(
address holder,
address spender,
uint256 nonce,
uint256 expiry,
bool allowed,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
contract PrimitiveLiquidity is PrimitiveConnector, IPrimitiveLiquidity, ReentrancyGuard {
using SafeERC20 for IERC20; // Reverts when `transfer` or `transferFrom` erc20 calls don't return proper data
using SafeMath for uint256; // Reverts on math underflows/overflows
event Initialized(address indexed from); // Emitted on deployment.
event AddLiquidity(address indexed from, address indexed option, uint256 sum);
event RemoveLiquidity(address indexed from, address indexed option, uint256 sum);
IUniswapV2Factory private _factory; // The Uniswap V2 factory contract to get pair addresses from.
IUniswapV2Router02 private _router; // The Uniswap Router contract used to interact with the protocol.
// ===== Constructor =====
constructor(
address weth_,
address primitiveRouter_,
address factory_,
address router_
) public PrimitiveConnector(weth_, primitiveRouter_) {
_factory = IUniswapV2Factory(factory_);
_router = IUniswapV2Router02(router_);
emit Initialized(_msgSender());
}
// ===== Liquidity Operations =====
/**
* @dev Adds redeemToken liquidity to a redeem<>underlyingToken pair by minting redeemTokens with underlyingTokens.
* @notice Pulls underlying tokens from `getCaller()` and pushes UNI-V2 liquidity tokens to the "getCaller()" address.
* underlyingToken -> redeemToken -> UNI-V2.
* @param optionAddress The address of the optionToken to get the redeemToken to mint then provide liquidity for.
* @param quantityOptions The quantity of underlyingTokens to use to mint option + redeem tokens.
* @param amountBMax The quantity of underlyingTokens to add with redeemTokens to the Uniswap V2 Pair.
* @param amountBMin The minimum quantity of underlyingTokens expected to provide liquidity with.
* @param deadline The timestamp to expire a pending transaction.
* @return Returns (amountA, amountB, liquidity) amounts.
*/
function addShortLiquidityWithUnderlying(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline
)
public
override
nonReentrant
onlyRegistered(IOption(optionAddress))
returns (
uint256,
uint256,
uint256
)
{
uint256 amountA;
uint256 amountB;
uint256 liquidity;
address underlying = IOption(optionAddress).getUnderlyingTokenAddress();
// Pulls total = (quantityOptions + amountBMax) of underlyingTokens from `getCaller()` to this contract.
{
uint256 sum = quantityOptions.add(amountBMax);
_transferFromCaller(underlying, sum);
}
// Pushes underlyingTokens to option contract and mints option + redeem tokens to this contract.
IERC20(underlying).safeTransfer(optionAddress, quantityOptions);
(, uint256 outputRedeems) = IOption(optionAddress).mintOptions(address(this));
{
// scope for adding exact liquidity, avoids stack too deep errors
IOption optionToken = IOption(optionAddress);
address redeem = optionToken.redeemToken();
AddAmounts memory params;
params.amountAMax = outputRedeems;
params.amountBMax = amountBMax;
params.amountAMin = outputRedeems;
params.amountBMin = amountBMin;
params.deadline = deadline;
// Approves Uniswap V2 Pair pull tokens from this contract.
checkApproval(redeem, address(_router));
checkApproval(underlying, address(_router));
// Adds liquidity to Uniswap V2 Pair and returns liquidity shares to the "getCaller()" address.
(amountA, amountB, liquidity) = _addLiquidity(redeem, underlying, params);
// Check for exact liquidity provided.
assert(amountA == outputRedeems);
// Return remaining tokens
_transferToCaller(underlying);
_transferToCaller(redeem);
_transferToCaller(address(optionToken));
}
{
// scope for event, avoids stack too deep errors
address a0 = optionAddress;
uint256 q0 = quantityOptions;
uint256 q1 = amountBMax;
emit AddLiquidity(getCaller(), a0, q0.add(q1));
}
return (amountA, amountB, liquidity);
}
/**
* @dev Adds redeemToken liquidity to a redeem<>underlyingToken pair by minting shortOptionTokens with underlyingTokens.
* Doesn't check for registered optionAddress because the returned function does.
* @notice Pulls underlying tokens from `getCaller()` and pushes UNI-V2 liquidity tokens to the "getCaller()" address.
* underlyingToken -> redeemToken -> UNI-V2. Uses permit so user does not need to `approve()` our contracts.
* @param optionAddress The address of the optionToken to get the redeemToken to mint then provide liquidity for.
* @param quantityOptions The quantity of underlyingTokens to use to mint option + redeem tokens.
* @param amountBMax The quantity of underlyingTokens to add with shortOptionTokens to the Uniswap V2 Pair.
* @param amountBMin The minimum quantity of underlyingTokens expected to provide liquidity with.
* @param deadline The timestamp to expire a pending transaction.
* @return Returns (amountA, amountB, liquidity) amounts.
*/
function addShortLiquidityWithUnderlyingWithPermit(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
)
external
override
returns (
uint256,
uint256,
uint256
)
{
IERC20Permit underlying =
IERC20Permit(IOption(optionAddress).getUnderlyingTokenAddress());
uint256 sum = quantityOptions.add(amountBMax);
underlying.permit(getCaller(), address(_primitiveRouter), sum, deadline, v, r, s);
return
addShortLiquidityWithUnderlying(
optionAddress,
quantityOptions,
amountBMax,
amountBMin,
deadline
);
}
/**
* @dev Doesn't check for registered optionAddress because the returned function does.
* @notice Specialized function for `permit` calling on Put options (DAI).
*/
function addShortLiquidityDAIWithPermit(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
)
external
override
returns (
uint256,
uint256,
uint256
)
{
DaiPermit dai = DaiPermit(IOption(optionAddress).getUnderlyingTokenAddress());
address caller = getCaller();
dai.permit(
caller,
address(_primitiveRouter),
IERC20Permit(address(dai)).nonces(caller),
deadline,
true,
v,
r,
s
);
return
addShortLiquidityWithUnderlying(
optionAddress,
quantityOptions,
amountBMax,
amountBMin,
deadline
);
}
/**
* @dev Adds redeemToken liquidity to a redeem<>underlyingToken pair by minting shortOptionTokens with underlyingTokens.
* @notice Pulls underlying tokens from `getCaller()` and pushes UNI-V2 liquidity tokens to the `getCaller()` address.
* underlyingToken -> redeemToken -> UNI-V2.
* @param optionAddress The address of the optionToken to get the redeemToken to mint then provide liquidity for.
* @param quantityOptions The quantity of underlyingTokens to use to mint option + redeem tokens.
* @param amountBMax The quantity of underlyingTokens to add with shortOptionTokens to the Uniswap V2 Pair.
* @param amountBMin The minimum quantity of underlyingTokens expected to provide liquidity with.
* @param deadline The timestamp to expire a pending transaction.
* @return Returns (amountA, amountB, liquidity) amounts.
*/
function addShortLiquidityWithETH(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline
)
external
payable
override
nonReentrant
onlyRegistered(IOption(optionAddress))
returns (
uint256,
uint256,
uint256
)
{
require(
msg.value >= quantityOptions.add(amountBMax),
"PrimitiveLiquidity: INSUFFICIENT"
);
uint256 amountA;
uint256 amountB;
uint256 liquidity;
address underlying = IOption(optionAddress).getUnderlyingTokenAddress();
require(underlying == address(_weth), "PrimitiveLiquidity: NOT_WETH");
_depositETH(); // Wraps `msg.value` to Weth.
// Pushes Weth to option contract and mints option + redeem tokens to this contract.
IERC20(underlying).safeTransfer(optionAddress, quantityOptions);
(, uint256 outputRedeems) = IOption(optionAddress).mintOptions(address(this));
{
// scope for adding exact liquidity, avoids stack too deep errors
IOption optionToken = IOption(optionAddress);
address redeem = optionToken.redeemToken();
AddAmounts memory params;
params.amountAMax = outputRedeems;
params.amountBMax = amountBMax;
params.amountAMin = outputRedeems;
params.amountBMin = amountBMin;
params.deadline = deadline;
// Approves Uniswap V2 Pair pull tokens from this contract.
checkApproval(redeem, address(_router));
checkApproval(underlying, address(_router));
// Adds liquidity to Uniswap V2 Pair.
(amountA, amountB, liquidity) = _addLiquidity(redeem, underlying, params);
assert(amountA == outputRedeems); // Check for exact liquidity provided.
// Return remaining tokens and ether.
_withdrawETH();
_transferToCaller(redeem);
_transferToCaller(address(optionToken));
}
{
// scope for event, avoids stack too deep errors
address a0 = optionAddress;
uint256 q0 = quantityOptions;
uint256 q1 = amountBMax;
emit AddLiquidity(getCaller(), a0, q0.add(q1));
}
return (amountA, amountB, liquidity);
}
struct AddAmounts {
uint256 amountAMax;
uint256 amountBMax;
uint256 amountAMin;
uint256 amountBMin;
uint256 deadline;
}
/**
* @notice Calls UniswapV2Router02.addLiquidity() function using this contract's tokens.
* @param tokenA The first token of the Uniswap Pair to add as liquidity.
* @param tokenB The second token of the Uniswap Pair to add as liquidity.
* @param params The amounts specified to be added as liquidity. Adds exact short options.
* @return Returns (amountTokenA, amountTokenB, liquidity) amounts.
*/
function _addLiquidity(
address tokenA,
address tokenB,
AddAmounts memory params
)
internal
returns (
uint256,
uint256,
uint256
)
{
return
_router.addLiquidity(
tokenA,
tokenB,
params.amountAMax,
params.amountBMax,
params.amountAMin,
params.amountBMin,
getCaller(),
params.deadline
);
}
/**
* @dev Combines Uniswap V2 Router "removeLiquidity" function with Primitive "closeOptions" function.
* @notice Pulls UNI-V2 liquidity shares with shortOption<>underlying token, and optionTokens from `getCaller()`.
* Then closes the longOptionTokens and withdraws underlyingTokens to the `getCaller()` address.
* Sends underlyingTokens from the burned UNI-V2 liquidity shares to the `getCaller()` address.
* UNI-V2 -> optionToken -> underlyingToken.
* @param optionAddress The address of the option that will be closed from burned UNI-V2 liquidity shares.
* @param liquidity The quantity of liquidity tokens to pull from `getCaller()` and burn.
* @param amountAMin The minimum quantity of shortOptionTokens to receive from removing liquidity.
* @param amountBMin The minimum quantity of underlyingTokens to receive from removing liquidity.
* @return Returns the sum of the removed underlying tokens.
*/
function removeShortLiquidityThenCloseOptions(
address optionAddress,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin
)
public
override
nonReentrant
onlyRegistered(IOption(optionAddress))
returns (uint256)
{
IOption optionToken = IOption(optionAddress);
(IUniswapV2Pair pair, address underlying, address redeem) =
getOptionPair(optionToken);
// Gets amounts struct.
RemoveAmounts memory params;
params.liquidity = liquidity;
params.amountAMin = amountAMin;
params.amountBMin = amountBMin;
// Pulls lp tokens from `getCaller()` and pushes them to the pair in preparation to invoke `burn()`.
_transferFromCallerToReceiver(address(pair), liquidity, address(pair));
// Calls `burn` on the `pair`, returning amounts to this contract.
(, uint256 underlyingAmount) = _removeLiquidity(pair, redeem, underlying, params);
uint256 underlyingProceeds = _closeOptions(optionToken); // Returns amount of underlying tokens released.
// Return remaining tokens/ether.
_withdrawETH(); // Unwraps Weth and sends ether to `getCaller()`.
_transferToCaller(redeem); // Push any remaining redeemTokens from removing liquidity (dust).
_transferToCaller(underlying); // Pushes underlying token to `getCaller()`.
uint256 sum = underlyingProceeds.add(underlyingAmount); // Total underlyings sent to `getCaller()`.
emit RemoveLiquidity(getCaller(), address(optionToken), sum);
return sum;
}
/**
* @notice Pulls LP tokens, burns them, removes liquidity, pull option token, burns then, pushes all underlying tokens.
* @dev Uses permit to pull LP tokens.
* @param optionAddress The address of the option that will be closed from burned UNI-V2 liquidity shares.
* @param liquidity The quantity of liquidity tokens to pull from _msgSender() and burn.
* @param amountAMin The minimum quantity of shortOptionTokens to receive from removing liquidity.
* @param amountBMin The minimum quantity of underlyingTokens to receive from removing liquidity.
* @param deadline The timestamp to expire a pending transaction and `permit` call.
* @return Returns the sum of the removed underlying tokens.
*/
function removeShortLiquidityThenCloseOptionsWithPermit(
address optionAddress,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external override returns (uint256) {
IOption optionToken = IOption(optionAddress);
(IUniswapV2Pair pair, , ) = getOptionPair(optionToken);
pair.permit(getCaller(), address(_primitiveRouter), liquidity, deadline, v, r, s);
return
removeShortLiquidityThenCloseOptions(
address(optionToken),
liquidity,
amountAMin,
amountBMin
);
}
struct RemoveAmounts {
uint256 liquidity;
uint256 amountAMin;
uint256 amountBMin;
}
/**
* @notice Calls `UniswapV2Pair.burn(address(this))` to burn LP tokens for pair tokens.
* @param pair The UniswapV2Pair contract to burn LP tokens of.
* @param tokenA The first token of the pair.
* @param tokenB The second token of the pair.
* @param params The amounts to specify the amount to remove and minAmounts to withdraw.
* @return Returns (amountTokenA, amountTokenB) which is (redeem, underlying) amounts.
*/
function _removeLiquidity(
IUniswapV2Pair pair,
address tokenA,
address tokenB,
RemoveAmounts memory params
) internal returns (uint256, uint256) {
(uint256 amount0, uint256 amount1) = pair.burn(address(this));
(address token0, ) = CoreLib.sortTokens(tokenA, tokenB);
(uint256 amountA, uint256 amountB) =
tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= params.amountAMin, "PrimitiveLiquidity: INSUFFICIENT_A");
require(amountB >= params.amountBMin, "PrimitiveLiquidity: INSUFFICIENT_B");
return (amountA, amountB);
}
// ===== View =====
/**
* @notice Gets the UniswapV2Router02 contract address.
*/
function getRouter() public view override returns (IUniswapV2Router02) {
return _router;
}
/**
* @notice Gets the UniswapV2Factory contract address.
*/
function getFactory() public view override returns (IUniswapV2Factory) {
return _factory;
}
/**
* @notice Fetchs the Uniswap Pair for an option's redeemToken and underlyingToken params.
* @param option The option token to get the corresponding UniswapV2Pair market.
* @return The pair address, as well as the tokens of the pair.
*/
function getOptionPair(IOption option)
public
view
override
returns (
IUniswapV2Pair,
address,
address
)
{
address redeem = option.redeemToken();
address underlying = option.getUnderlyingTokenAddress();
IUniswapV2Pair pair = IUniswapV2Pair(_factory.getPair(redeem, underlying));
return (pair, underlying, redeem);
}
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
import {
IUniswapV2Router02
} from "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import {
IUniswapV2Factory
} from "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import {IUniswapV2Pair} from "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
import {IOption} from "@primitivefi/contracts/contracts/option/interfaces/IOption.sol";
import {IERC20Permit} from "./IERC20Permit.sol";
interface IPrimitiveLiquidity {
// ==== External ====
function addShortLiquidityWithUnderlying(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline
)
external
returns (
uint256,
uint256,
uint256
);
function addShortLiquidityWithETH(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline
)
external
payable
returns (
uint256,
uint256,
uint256
);
function addShortLiquidityWithUnderlyingWithPermit(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
)
external
returns (
uint256,
uint256,
uint256
);
function addShortLiquidityDAIWithPermit(
address optionAddress,
uint256 quantityOptions,
uint256 amountBMax,
uint256 amountBMin,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
)
external
returns (
uint256,
uint256,
uint256
);
function removeShortLiquidityThenCloseOptions(
address optionAddress,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin
) external returns (uint256);
function removeShortLiquidityThenCloseOptionsWithPermit(
address optionAddress,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256);
// ==== View ====
function getRouter() external view returns (IUniswapV2Router02);
function getFactory() external view returns (IUniswapV2Factory);
function getOptionPair(IOption option)
external
view
returns (
IUniswapV2Pair,
address,
address
);
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title TestERC20
* @author Primitive
* @notice An opinionated ERC20 with `permit` to use ONLY for testing.
* @dev @primitivefi/[email protected]
*/
import {IERC20Permit} from "../interfaces/IERC20Permit.sol";
import {SafeMath} from "@openzeppelin/contracts/math/SafeMath.sol";
contract TestERC20 {
using SafeMath for uint256;
string public name = "Test Token";
string public symbol;
uint8 public constant decimals = 18;
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
mapping(address => uint256) public nonces;
bytes32 public DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH =
0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
constructor(
string memory name_,
string memory symbol_,
uint256 initialSupply
) public {
name = name_;
symbol = symbol_;
_mint(msg.sender, initialSupply);
uint256 chainId;
assembly {
chainId := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
),
keccak256(bytes(name_)),
keccak256(bytes("1")),
chainId,
address(this)
)
);
}
/**
* @dev Function to mint tokens
* @param to The address that will receive the minted tokens.
* @param value The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address to, uint256 value) public returns (bool) {
_mint(to, value);
return true;
}
function _mint(address to, uint256 value) internal {
totalSupply = totalSupply.add(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(address(0), to, value);
}
function _burn(address from, uint256 value) internal {
balanceOf[from] = balanceOf[from].sub(value);
totalSupply = totalSupply.sub(value);
emit Transfer(from, address(0), value);
}
function _approve(
address owner,
address spender,
uint256 value
) private {
allowance[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _transfer(
address from,
address to,
uint256 value
) private {
balanceOf[from] = balanceOf[from].sub(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(from, to, value);
}
function approve(address spender, uint256 value) external returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transfer(address to, uint256 value) external returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool) {
if (allowance[from][msg.sender] != uint256(-1)) {
allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
}
_transfer(from, to, value);
return true;
}
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external {
require(deadline >= block.timestamp, "Primitive: EXPIRED");
bytes32 digest =
keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
owner,
spender,
value,
nonces[owner]++,
deadline
)
)
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(
recoveredAddress != address(0) && recoveredAddress == owner,
"Primitive: INVALID_SIGNATURE"
);
_approve(owner, spender, value);
}
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Router
* @author Primitive
* @notice Contract to execute Primitive Connector functions.
* @dev @primitivefi/[email protected]
*/
// Open Zeppelin
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Pausable} from "@openzeppelin/contracts/utils/Pausable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {SafeMath} from "@openzeppelin/contracts/math/SafeMath.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import {
IPrimitiveRouter,
IRegistry,
IOption,
IERC20,
IWETH
} from "./interfaces/IPrimitiveRouter.sol";
/**
* @notice Used to execute calls on behalf of the Router contract.
* @dev Changes `msg.sender` context so the Router is not `msg.sender`.
*/
contract Route {
function executeCall(address target, bytes calldata params) external payable {
(bool success, bytes memory returnData) = target.call.value(msg.value)(params);
require(success, "Route: EXECUTION_FAIL");
}
}
contract PrimitiveRouter is IPrimitiveRouter, Ownable, Pausable, ReentrancyGuard {
using SafeERC20 for IERC20; // Reverts when `transfer` or `transferFrom` erc20 calls don't return proper data.
using SafeMath for uint256; // Reverts on math underflows/overflows.
// Constants
address private constant _NO_CALLER = address(0x0); // Default state for `_CALLER`.
// Events
event Initialized(address indexed from); // Emmitted on deployment
event Executed(address indexed from, address indexed to, bytes params);
event RegisteredOptions(address[] indexed options);
event RegisteredConnectors(address[] indexed connectors, bool[] registered);
// State variables
IRegistry private _registry; // The Primitive Registry which deploys Option clones.
IWETH private _weth; // Canonical WETH9
Route private _route; // Intermediary to do connector.call() from.
address private _CONNECTOR = _NO_CALLER; // If _EXECUTING, the `connector` of the execute call param.
address private _CALLER = _NO_CALLER; // If _EXECUTING, the orginal `_msgSender()` of the execute call.
bool private _EXECUTING; // True if the `executeCall` function was called.
// Whitelisted mappings
mapping(address => bool) private _registeredConnectors;
mapping(address => bool) private _registeredOptions;
/**
* @notice A mutex to use during an `execute` call.
* @dev Checks to make sure the `_CONNECTOR` in state is the `msg.sender`.
* Checks to make sure a `_CALLER` was set.
* Fails if this modifier is triggered by an external call.
* Fails if this modifier is triggered by calling a function without going through `executeCall`.
*/
modifier isExec() {
require(_CONNECTOR == _msgSender(), "Router: NOT_CONNECTOR");
require(_CALLER != _NO_CALLER, "Router: NO_CALLER");
require(!_EXECUTING, "Router: IN_EXECUTION");
_EXECUTING = true;
_;
_EXECUTING = false;
}
// ===== Constructor =====
constructor(address weth_, address registry_) public {
require(address(_weth) == address(0x0), "Router: INITIALIZED");
_route = new Route();
_weth = IWETH(weth_);
_registry = IRegistry(registry_);
emit Initialized(_msgSender());
}
// ===== Pausability =====
/**
* @notice Halts use of `executeCall`, and other functions that change state.
*/
function halt() external override onlyOwner {
if (paused()) {
_unpause();
} else {
_pause();
}
}
// ===== Registration =====
/**
* @notice Checks option against Primitive Registry. If from Registry, registers as true.
* NOTE: Purposefully does not have `onlyOwner` modifier.
* @dev Sets `optionAddresses` to true in the whitelisted options mapping, if from Registry.
* @param optionAddresses The array of option addresses to update.
*/
function setRegisteredOptions(address[] calldata optionAddresses)
external
override
returns (bool)
{
uint256 len = optionAddresses.length;
for (uint256 i = 0; i < len; i++) {
address option = optionAddresses[i];
require(isFromPrimitiveRegistry(IOption(option)), "Router: EVIL_OPTION");
_registeredOptions[option] = true;
}
emit RegisteredOptions(optionAddresses);
return true;
}
/**
* @notice Allows the `owner` to set whitelisted connector contracts.
* @dev Sets `connectors` to `isValid` in the whitelisted connectors mapping.
* @param connectors The array of option addresses to update.
* @param isValid Whether or not the optionAddress is registered.
*/
function setRegisteredConnectors(address[] memory connectors, bool[] memory isValid)
public
override
onlyOwner
returns (bool)
{
uint256 len = connectors.length;
require(len == isValid.length, "Router: LENGTHS");
for (uint256 i = 0; i < len; i++) {
address connector = connectors[i];
bool status = isValid[i];
_registeredConnectors[connector] = status;
}
emit RegisteredConnectors(connectors, isValid);
return true;
}
/**
* @notice Checks an option against the Primitive Registry.
* @param option The IOption token to check.
* @return Whether or not the option was deployed from the Primitive Registry.
*/
function isFromPrimitiveRegistry(IOption option) internal view returns (bool) {
return (address(option) ==
_registry.getOptionAddress(
option.getUnderlyingTokenAddress(),
option.getStrikeTokenAddress(),
option.getBaseValue(),
option.getQuoteValue(),
option.getExpiryTime()
) &&
address(option) != address(0));
}
// ===== Operations =====
/**
* @notice Transfers ERC20 tokens from the executing `_CALLER` to the executing `_CONNECTOR`.
* @param token The address of the ERC20.
* @param amount The amount of ERC20 to transfer.
* @return Whether or not the transfer succeeded.
*/
function transferFromCaller(address token, uint256 amount)
public
override
isExec
whenNotPaused
returns (bool)
{
IERC20(token).safeTransferFrom(
getCaller(), // Account to pull from
_msgSender(), // The connector
amount
);
return true;
}
/**
* @notice Transfers ERC20 tokens from the executing `_CALLER` to an arbitrary address.
* @param token The address of the ERC20.
* @param amount The amount of ERC20 to transfer.
* @return Whether or not the transfer succeeded.
*/
function transferFromCallerToReceiver(
address token,
uint256 amount,
address receiver
) public override isExec whenNotPaused returns (bool) {
IERC20(token).safeTransferFrom(
getCaller(), // Account to pull from
receiver,
amount
);
return true;
}
// ===== Execute =====
/**
* @notice Executes a call with `params` to the target `connector` contract from `_route`.
* @param connector The Primitive Connector module to call.
* @param params The encoded function data to use.
*/
function executeCall(address connector, bytes calldata params)
external
payable
override
whenNotPaused
{
require(_registeredConnectors[connector], "Router: INVALID_CONNECTOR");
_CALLER = _msgSender();
_CONNECTOR = connector;
_route.executeCall.value(msg.value)(connector, params);
_CALLER = _NO_CALLER;
_CONNECTOR = _NO_CALLER;
emit Executed(_msgSender(), connector, params);
}
// ===== Fallback =====
receive() external payable whenNotPaused {
assert(_msgSender() == address(_weth)); // only accept ETH via fallback from the WETH contract
}
// ===== View =====
/**
* @notice Returns the IWETH contract address.
*/
function getWeth() public view override returns (IWETH) {
return _weth;
}
/**
* @notice Returns the Route contract which executes functions on behalf of this contract.
*/
function getRoute() public view override returns (address) {
return address(_route);
}
/**
* @notice Returns the `_CALLER` which is set to `_msgSender()` during an `executeCall` invocation.
*/
function getCaller() public view override returns (address) {
return _CALLER;
}
/**
* @notice Returns the Primitive Registry contract address.
*/
function getRegistry() public view override returns (IRegistry) {
return _registry;
}
/**
* @notice Returns a bool if `option` is registered or not.
* @param option The address of the Option to check if registered.
*/
function getRegisteredOption(address option) external view override returns (bool) {
return _registeredOptions[option];
}
/**
* @notice Returns a bool if `connector` is registered or not.
* @param connector The address of the Connector contract to check if registered.
*/
function getRegisteredConnector(address connector)
external
view
override
returns (bool)
{
return _registeredConnectors[connector];
}
/**
* @notice Returns the NPM package version and github version of this contract.
* @dev For the npm package: @primitivefi/v1-connectors
* For the repository: github.com/primitivefinance/primitive-v1-connectors
* @return The apiVersion string.
*/
function apiVersion() public pure override returns (string memory) {
return "2.0.0";
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../GSN/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.
*/
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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../GSN/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () internal {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
import {IOption} from "@primitivefi/contracts/contracts/option/interfaces/IOption.sol";
import {IERC20Permit} from "./IERC20Permit.sol";
interface IPrimitiveCore {
// ===== External =====
function safeMintWithETH(IOption optionToken)
external
payable
returns (uint256, uint256);
function safeMintWithPermit(
IOption optionToken,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256, uint256);
function safeExerciseWithETH(IOption optionToken)
external
payable
returns (uint256, uint256);
function safeExerciseForETH(IOption optionToken, uint256 exerciseQuantity)
external
returns (uint256, uint256);
function safeRedeemForETH(IOption optionToken, uint256 redeemQuantity)
external
returns (uint256);
function safeCloseForETH(IOption optionToken, uint256 closeQuantity)
external
returns (
uint256,
uint256,
uint256
);
}
// SPDX-License-Identifier: MIT
// Copyright 2021 Primitive Finance
//
// 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.
pragma solidity 0.6.2;
/**
* @title Primitive Core
* @author Primitive
* @notice A Connector with Ether abstractions for Primitive Option tokens.
* @dev @primitivefi/[email protected]
*/
// Open Zeppelin
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
// Primitive
import {CoreLib, SafeMath} from "../libraries/CoreLib.sol";
import {IPrimitiveCore, IERC20Permit, IOption} from "../interfaces/IPrimitiveCore.sol";
import {PrimitiveConnector} from "./PrimitiveConnector.sol";
contract PrimitiveCore is PrimitiveConnector, IPrimitiveCore, ReentrancyGuard {
using SafeERC20 for IERC20; // Reverts when `transfer` or `transferFrom` erc20 calls don't return proper data
using SafeMath for uint256; // Reverts on math underflows/overflows
event Initialized(address indexed from); // Emmitted on deployment
event Minted(
address indexed from,
address indexed option,
uint256 longQuantity,
uint256 shortQuantity
);
event Exercised(address indexed from, address indexed option, uint256 quantity);
event Redeemed(address indexed from, address indexed option, uint256 quantity);
event Closed(address indexed from, address indexed option, uint256 quantity);
// ===== Constructor =====
constructor(address weth_, address primitiveRouter_)
public
PrimitiveConnector(weth_, primitiveRouter_)
{
emit Initialized(_msgSender());
}
// ===== Weth Abstraction =====
/**
* @dev Mints msg.value quantity of options and "quote" (option parameter) quantity of redeem tokens.
* @notice This function is for options that have WETH as the underlying asset.
* @param optionToken The address of the option token to mint.
* @return (uint, uint) Returns the (long, short) option tokens minted
*/
function safeMintWithETH(IOption optionToken)
external
payable
override
nonReentrant
onlyRegistered(optionToken)
returns (uint256, uint256)
{
require(msg.value > 0, "PrimitiveCore: ERR_ZERO");
address caller = getCaller();
_depositETH(); // Deposits `msg.value` to Weth contract.
(uint256 long, uint256 short) = _mintOptionsToReceiver(optionToken, caller);
emit Minted(caller, address(optionToken), long, short);
return (long, short);
}
/**
* @dev Mints "amount" quantity of options and "quote" (option parameter) quantity of redeem tokens.
* @notice This function is for options that have an EIP2612 (permit) enabled token as the underlying asset.
* @param optionToken The address of the option token to mint.
* @param amount The quantity of options to mint.
* @param deadline The timestamp which expires the `permit` call.
* @return (uint, uint) Returns the (long, short) option tokens minted
*/
function safeMintWithPermit(
IOption optionToken,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
)
external
override
nonReentrant
onlyRegistered(optionToken)
returns (uint256, uint256)
{
// Permit minting using the caller's underlying tokens.
IERC20Permit(optionToken.getUnderlyingTokenAddress()).permit(
getCaller(),
address(_primitiveRouter),
amount,
deadline,
v,
r,
s
);
(uint256 long, uint256 short) = _mintOptionsFromCaller(optionToken, amount);
emit Minted(getCaller(), address(optionToken), long, short);
return (long, short);
}
/**
* @dev Swaps msg.value of strikeTokens (ethers) to underlyingTokens.
* Uses the strike ratio as the exchange rate. Strike ratio = base / quote.
* Msg.value (quote units) * base / quote = base units (underlyingTokens) to withdraw.
* @notice This function is for options with WETH as the strike asset.
* Burns option tokens, accepts ethers, and pushes out underlyingTokens.
* @param optionToken The address of the option contract.
*/
function safeExerciseWithETH(IOption optionToken)
public
payable
override
nonReentrant
onlyRegistered(optionToken)
returns (uint256, uint256)
{
require(msg.value > 0, "PrimitiveCore: ZERO");
_depositETH(); // Deposits `msg.value` to Weth contract.
uint256 long = CoreLib.getProportionalLongOptions(optionToken, msg.value);
_transferFromCaller(address(optionToken), long); // Pull option tokens.
// Pushes option tokens and weth (strike asset), receives underlying tokens.
emit Exercised(getCaller(), address(optionToken), long);
return _exerciseOptions(optionToken, long);
}
/**
* @dev Swaps strikeTokens to underlyingTokens, WETH, which is converted to ethers before withdrawn.
* Uses the strike ratio as the exchange rate. Strike ratio = base / quote.
* @notice This function is for options with WETH as the underlying asset.
* Burns option tokens, pulls strikeTokens, and pushes out ethers.
* @param optionToken The address of the option contract.
* @param exerciseQuantity Quantity of optionTokens to exercise.
*/
function safeExerciseForETH(IOption optionToken, uint256 exerciseQuantity)
public
override
nonReentrant
onlyRegistered(optionToken)
returns (uint256, uint256)
{
address underlying = optionToken.getUnderlyingTokenAddress();
address strike = optionToken.getStrikeTokenAddress();
uint256 strikeQuantity =
CoreLib.getProportionalShortOptions(optionToken, exerciseQuantity);
// Pull options and strike assets from `getCaller()` and send to option contract.
_transferFromCallerToReceiver(
address(optionToken),
exerciseQuantity,
address(optionToken)
);
_transferFromCallerToReceiver(strike, strikeQuantity, address(optionToken));
// Release underlying tokens by invoking `exerciseOptions()`
(uint256 strikesPaid, uint256 options) =
optionToken.exerciseOptions(address(this), exerciseQuantity, new bytes(0));
_withdrawETH(); // Unwraps this contract's balance of Weth and sends to `getCaller()`.
emit Exercised(getCaller(), address(optionToken), exerciseQuantity);
return (strikesPaid, options);
}
/**
* @dev Burns redeem tokens to withdraw strike tokens (ethers) at a 1:1 ratio.
* @notice This function is for options that have WETH as the strike asset.
* Converts WETH to ethers, and withdraws ethers to the receiver address.
* @param optionToken The address of the option contract.
* @param redeemQuantity The quantity of redeemTokens to burn.
*/
function safeRedeemForETH(IOption optionToken, uint256 redeemQuantity)
public
override
nonReentrant
onlyRegistered(optionToken)
returns (uint256)
{
// Require the strike token to be Weth.
address redeem = optionToken.redeemToken();
// Pull redeem tokens from `getCaller()` and send to option contract.
_transferFromCallerToReceiver(redeem, redeemQuantity, address(optionToken));
uint256 short = optionToken.redeemStrikeTokens(address(this));
_withdrawETH(); // Unwraps this contract's balance of Weth and sends to `getCaller()`.
emit Redeemed(getCaller(), address(optionToken), redeemQuantity);
return short;
}
/**
* @dev Burn optionTokens and redeemTokens to withdraw underlyingTokens (ethers).
* @notice This function is for options with WETH as the underlying asset.
* WETH underlyingTokens are converted to ethers before being sent to receiver.
* The redeemTokens to burn is equal to the optionTokens * strike ratio.
* inputOptions = inputRedeems / strike ratio = outUnderlyings
* @param optionToken The address of the option contract.
* @param closeQuantity Quantity of optionTokens to burn and an input to calculate how many redeems to burn.
*/
function safeCloseForETH(IOption optionToken, uint256 closeQuantity)
public
override
nonReentrant
onlyRegistered(optionToken)
returns (
uint256,
uint256,
uint256
)
{
address redeem = optionToken.redeemToken();
uint256 short = CoreLib.getProportionalShortOptions(optionToken, closeQuantity);
// Pull redeem tokens from `getCaller()` and send to option contract.
_transferFromCallerToReceiver(redeem, short, address(optionToken));
// Pull options if not expired, and send to option contract.
if (optionToken.getExpiryTime() >= now) {
_transferFromCallerToReceiver(
address(optionToken),
closeQuantity,
address(optionToken)
);
}
// Release underlyingTokens by invoking `closeOptions()`
(uint256 inputRedeems, uint256 inputOptions, uint256 outUnderlyings) =
optionToken.closeOptions(address(this));
_withdrawETH(); // Unwraps this contract's balance of Weth and sends to `getCaller()`.
emit Closed(getCaller(), address(optionToken), closeQuantity);
return (inputRedeems, inputOptions, outUnderlyings);
}
}
|
* @notice Uses this contract's balance of underlyingTokens to mint optionTokens to `receiver`. @param optionToken The Primitive Option to mint. @param receiver The address that will received the minted long and short optionTokens. @return (uint, uint) Returns the (long, short) option tokens minted/
|
function _mintOptionsToReceiver(IOption optionToken, address receiver)
internal
returns (uint256, uint256)
{
address underlying = optionToken.getUnderlyingTokenAddress();
return optionToken.mintOptions(receiver);
}
| 11,694,694
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pragma solidity 0.7.0;
import "./Modules/Administration.sol";
import "./Math/SafeMath.sol";
import "./Interfaces/ERC20Interface.sol";
contract PaymentChannels is Administration {
using SafeMath for uint256;
string constant public VERSION = "0.4.3alpha";
bytes private prefix = "\x19Ethereum Signed Message:\n32";
// prevent any possible accidental triggering of developer only conditions
bool public dev = true;
enum ChannelStates { opened, expired, finalized, closed }
ChannelStates public defaultState = ChannelStates.opened;
struct EthChannelStruct {
address source;
address destination;
uint256 value;
uint256 closingDate;
uint256 openDate;
bytes32 channelId;
bool sourceProofSubmitted;
bool destinationProofSubmitted;
ChannelStates state;
}
struct ErcChannelStruct {
address source;
address destination;
address tokenAddress;
uint256 value;
uint256 closingDate;
uint256 openDate;
bytes32 channelId;
bool sourceProofSubmitted;
bool destinationProofSubmitted;
ChannelStates state;
}
mapping (bytes32 => EthChannelStruct) public ethChannels;
mapping (bytes32 => ErcChannelStruct) public ercChannels;
mapping (uint256 => bytes32) private channelNumber;
mapping (bytes32 => bool) private channelIds;
/* prevent resubmission of the same signed messages by a particular address within a channel
key 1 (bytes32) = channel id
key 2 (bytes32) = messageHash
key 3 (address) = address of the submitter
val (bool) = whether or not the message has already been submitted
*/
mapping (bytes32 => mapping (bytes32 => mapping(address => bool))) private signedMessages;
/*
keeps track of micro payment proofs and prevent them from being reused.
key 1 (bytes32) = channel ID
key 2 (bytes32) = message hash
val 1 (bool) = boolean, true (message hash used), false (message hash not used)
*/
mapping (bytes32 => mapping (bytes32 => bool)) private microPaymentHashes;
/* Micropayment proof
bytes32, uint256, uint256
hash: keccak256(channelId, paymentId, withdrawalAmount)
*/
event EthChannelOpened(bytes32 indexed _channelId);
event ErcChannelOpened(bytes32 indexed _channelId);
event ChannelClosed(bytes32 indexed _channelId);
event ChannelExpired(bytes32 indexed _channelId);
event DestinationProofSubmitted(bytes32 indexed _channelId, address indexed _recoveredAddress);
event SourceProofSubmitted(bytes32 indexed _channelId, address indexed _recoveredAddress);
event MicroPaymentWithdrawn(bytes32 indexed _channelId, uint256 _amount, uint256 _remainingChannelValue);
event EthWithdrawn();
event TokensWithdrawn(address indexed _tokenAddress);
fallback() external payable {}
receive() external payable {}
/** start of eth channel functions */
function openEthChannel(
address _destination,
uint256 _channelValueInWei,
uint256 _durationInDays)
public
payable
returns (bool)
{
require(msg.value == _channelValueInWei);
uint256 currentDate = block.timestamp;
// channel hash = keccak256(purchaser, vendor, channel value, date of open)
bytes32 channelId = keccak256(abi.encodePacked(msg.sender, _destination, _channelValueInWei, currentDate));
// make sure the channel id doens't already exist
require(!channelIds[channelId]);
channelIds[channelId] = true;
ethChannels[channelId].source = msg.sender;
ethChannels[channelId].destination = _destination;
ethChannels[channelId].value = _channelValueInWei;
ethChannels[channelId].closingDate = (block.timestamp + (_durationInDays * 1 days));
ethChannels[channelId].openDate = currentDate;
ethChannels[channelId].channelId = channelId;
ethChannels[channelId].state = defaultState;
emit EthChannelOpened(channelId);
return true;
}
function submitEthSourceProof(
bytes32 _h,
uint8 _v,
bytes32 _r,
bytes32 _s,
bytes32 _channelId)
public
returns (bool)
{
require(channelIds[_channelId]);
require(ethChannels[_channelId].state == ChannelStates.opened);
require(!ethChannels[_channelId].sourceProofSubmitted);
require(!signedMessages[_channelId][_h][msg.sender]);
address signer = ecrecover(_h, _v, _r, _s);
assert(signer == ethChannels[_channelId].source);
ethChannels[_channelId].sourceProofSubmitted = true;
signedMessages[_channelId][_h][msg.sender];
emit SourceProofSubmitted(_channelId, signer);
if (verifyDoubleProof(_channelId, false)) {
ethChannels[_channelId].state = ChannelStates.finalized;
}
return true;
}
function submitEthDestinationProof(
bytes32 _h,
uint8 _v,
bytes32 _r,
bytes32 _s,
bytes32 _channelId)
public
returns (bool)
{
require(channelIds[_channelId]);
require(ethChannels[_channelId].state == ChannelStates.opened);
require(!ethChannels[_channelId].destinationProofSubmitted);
require(!signedMessages[_channelId][_h][msg.sender]);
address signer = ecrecover(_h, _v, _r, _s);
assert(signer == ethChannels[_channelId].destination);
ethChannels[_channelId].destinationProofSubmitted = true;
signedMessages[_channelId][_h][msg.sender];
emit DestinationProofSubmitted(_channelId, signer);
if (verifyDoubleProof(_channelId, false)) {
ethChannels[_channelId].state = ChannelStates.finalized;
}
return true;
}
/** end of eth channel functions */
/** start of ERC20 channel functions */
function openErcChannel(
address _tokenAddress,
address _destination,
uint256 _channelValueInWei,
uint256 _durationInDays)
public
returns (bool)
{
bytes32 channelId = keccak256(abi.encodePacked(msg.sender, _destination, _tokenAddress, block.timestamp));
// make sure the chanel ID doesn't already exist
require(!channelIds[channelId]);
channelIds[channelId] = true;
ercChannels[channelId].source = msg.sender;
ercChannels[channelId].destination = _destination;
ercChannels[channelId].tokenAddress = _tokenAddress;
ercChannels[channelId].value = _channelValueInWei;
ercChannels[channelId].closingDate = (block.timestamp + (_durationInDays * 1 days));
ercChannels[channelId].openDate = block.timestamp;
ercChannels[channelId].channelId = channelId;
ERC20Interface e = ERC20Interface(_tokenAddress);
emit ErcChannelOpened(channelId);
require(e.transferFrom(msg.sender, address(this), _channelValueInWei));
return true;
}
/**
Need to add a require function to ensure the signed message hash hasn't already been submitted
*/
function submitErcSourceProof(
bytes32 _h,
uint8 _v,
bytes32 _r,
bytes32 _s,
bytes32 _channelId)
public
returns (bool)
{
// verify correct channel id
require(channelIds[_channelId]);
// ensure channel state is opened
require(ercChannels[_channelId].state == ChannelStates.opened);
// make sure source proof hasn't already been submitted
require(!ercChannels[_channelId].sourceProofSubmitted);
// recover address of signer
address signer = ecrecover(_h, _v, _r, _s);
// ensure that the signer is the source of the channel
assert (signer == ercChannels[_channelId].source);
// mark source proof as submitted
ercChannels[_channelId].sourceProofSubmitted = true;
// ensure this proof can't be reused by the same sender
signedMessages[_channelId][_h][msg.sender] = true;
// notify blockchain
emit SourceProofSubmitted(_channelId, signer);
if (verifyDoubleProof(_channelId, true)) {
ercChannels[_channelId].state = ChannelStates.finalized;
}
return true;
}
/**
Need to add a require function to check for sign messaged hash use
*/
function submitErcDestinationProof(
bytes32 _h,
uint8 _v,
bytes32 _r,
bytes32 _s,
bytes32 _channelId)
public
returns (bool)
{
// verify correct channel id
require(channelIds[_channelId]);
// ensure channel state is opened
require(ercChannels[_channelId].state == ChannelStates.opened);
// make sure destination proof hasn't already been submitted
require(!ercChannels[_channelId].destinationProofSubmitted);
// recover address of signer
address signer = ecrecover(_h, _v, _r, _s);
// ensure that the signer is the destionation of the channel
assert (signer == ercChannels[_channelId].destination);
// mark destination proof as submitted
ercChannels[_channelId].destinationProofSubmitted = true;
// ensure this proof can't be reused by the same sender
signedMessages[_channelId][_h][msg.sender] = true;
// notify blockchain
emit DestinationProofSubmitted(_channelId, signer);
if (verifyDoubleProof(_channelId, true)) {
ercChannels[_channelId].state = ChannelStates.finalized;
}
return true;
}
function submitErcMicroPaymentProof(
bytes32 _h,
uint8 _v,
bytes32 _r,
bytes32 _s,
bytes32 _channelId,
uint256 _paymentId,
uint256 _amount)
public
returns (bool)
{
require(channelIds[_channelId]);
require(ercChannels[_channelId].state == ChannelStates.opened);
require(ercChannels[_channelId].value > 0);
require(msg.sender == ercChannels[_channelId].destination);
bytes32 proof = keccak256(abi.encodePacked(_channelId, _paymentId, _amount));
bytes32 prefixedProof = keccak256(abi.encodePacked(prefix, proof));
assert(prefixedProof == _h);
address signer = ecrecover(_h, _v, _r, _s);
assert(signer == ercChannels[_channelId].source);
uint256 remainingChannelValue = ercChannels[_channelId].value.sub(_amount);
ercChannels[_channelId].value = remainingChannelValue;
ERC20Interface e = ERC20Interface(ercChannels[_channelId].tokenAddress);
emit TokensWithdrawn(ercChannels[_channelId].tokenAddress);
require(e.transfer(msg.sender, _amount));
return true;
}
function closeErcChannel(
bytes32 _channelId,
address _tokenAddress)
public
returns (bool)
{
require(channelIds[_channelId]);
require(ercChannels[_channelId].state == ChannelStates.finalized);
// make sure that once the channel is finalized *ONLY* the destination can withdraw funds
require(msg.sender == ercChannels[_channelId].destination);
require(_tokenAddress == ercChannels[_channelId].tokenAddress);
uint256 deposit = ercChannels[_channelId].value;
ercChannels[_channelId].value = 0;
// lets close the channel
ercChannels[_channelId].state = ChannelStates.closed;
ERC20Interface e = ERC20Interface(_tokenAddress);
emit ChannelClosed(_channelId);
emit TokensWithdrawn(_tokenAddress);
require(e.transfer(msg.sender, deposit));
return true;
}
/**
Used to withdraw whatever funds are remaining in the channel, so long as the channel is opened
*/
function expireErcChannel(
bytes32 _channelId,
address _tokenAddress)
public
returns (bool)
{
require(channelIds[_channelId]);
require(ercChannels[_channelId].state == ChannelStates.opened);
// make sure that only the source is allowed to invoke this function
require(msg.sender == ercChannels[_channelId].source);
require(_tokenAddress == ercChannels[_channelId].tokenAddress);
uint256 deposit = ercChannels[_channelId].value;
ercChannels[_channelId].value = 0;
ercChannels[_channelId].state = ChannelStates.expired;
ERC20Interface e = ERC20Interface(_tokenAddress);
emit ChannelExpired(_channelId);
emit TokensWithdrawn(_tokenAddress);
require(e.transfer(msg.sender, deposit));
return true;
}
/** end of erc20 channel functions */
/** start of internal functions */
/**
Set _ercChannel to true if you are attempting to verify the submission status of both proofs for an ERC channel
Set _ercChannel to false if you are attempting to verify the submission status of both proofs for an ETH channel
*/
function verifyDoubleProof(
bytes32 _channelId,
bool _ercChannel)
internal
view
returns (bool)
{
if (_ercChannel) {
require(ercChannels[_channelId].state == ChannelStates.opened);
if (ercChannels[_channelId].sourceProofSubmitted == true && ercChannels[_channelId].destinationProofSubmitted) {
return true;
}
} else {
require(ethChannels[_channelId].state == ChannelStates.opened);
if (ethChannels[_channelId].sourceProofSubmitted == true && ethChannels[_channelId].destinationProofSubmitted) {
return true;
}
}
return false;
}
/**
withdraw any ether in the contract, only when in developer mode
*/
function withdrawEth()
public
onlyAdmin
returns (bool)
{
require(dev);
emit EthWithdrawn();
msg.sender.transfer(address(this).balance);
return true;
}
function withdrawTokens(
address _tokenAddress)
public
onlyAdmin
returns (bool)
{
require(dev);
ERC20Interface e = ERC20Interface(_tokenAddress);
uint256 balance = e.balanceOf(address(this));
emit TokensWithdrawn(_tokenAddress);
require(e.transfer(msg.sender, balance));
return true;
}
}
|
/ make sure that only the source is allowed to invoke this function
|
function expireErcChannel(
bytes32 _channelId,
address _tokenAddress)
public
returns (bool)
{
require(channelIds[_channelId]);
require(ercChannels[_channelId].state == ChannelStates.opened);
require(msg.sender == ercChannels[_channelId].source);
require(_tokenAddress == ercChannels[_channelId].tokenAddress);
uint256 deposit = ercChannels[_channelId].value;
ercChannels[_channelId].value = 0;
ercChannels[_channelId].state = ChannelStates.expired;
ERC20Interface e = ERC20Interface(_tokenAddress);
emit ChannelExpired(_channelId);
emit TokensWithdrawn(_tokenAddress);
require(e.transfer(msg.sender, deposit));
return true;
}
Set _ercChannel to false if you are attempting to verify the submission status of both proofs for an ETH channel
| 1,779,692
|
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/**
*Submitted for verification at Etherscan.io on 2021-04-01
*/
// SPDX-License-Identifier: Unlicense
pragma solidity 0.6.12;
// Part: AddressUpgradeable
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Part: AggregatorV3Interface
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
// getRoundData and latestRoundData should both raise "No data present"
// if they do not have data to report, instead of returning unset values
// which could be misinterpreted as actual reported values.
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
// Part: IERC20Upgradeable
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @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);
}
}
}
}
// Part: OpenZeppelin/[email protected]/Clones
/**
* @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
* deploying minimal proxy contracts, also known as "clones".
*
* > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
* > a minimal bytecode implementation that delegates all calls to a known, fixed address.
*
* The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
* (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
* deterministic method.
*
* _Available since v3.4._
*/
library Clones {
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
*
* This function uses the create opcode, which should never revert.
*/
function clone(address master) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, master))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create(0, ptr, 0x37)
}
require(instance != address(0), "ERC1167: create failed");
}
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
*
* This function uses the create2 opcode and a `salt` to deterministically deploy
* the clone. Using the same `master` and `salt` multiple time will revert, since
* the clones cannot be deployed twice at the same address.
*/
function cloneDeterministic(address master, bytes32 salt) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, master))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create2(0, ptr, 0x37, salt)
}
require(instance != address(0), "ERC1167: create2 failed");
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address master, bytes32 salt, address deployer) internal pure returns (address predicted) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, master))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
mstore(add(ptr, 0x38), shl(0x60, deployer))
mstore(add(ptr, 0x4c), salt)
mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
predicted := keccak256(add(ptr, 0x37), 0x55)
}
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address master, bytes32 salt) internal view returns (address predicted) {
return predictDeterministicAddress(master, salt, address(this));
}
}
// Part: OpenZeppelin/[email protected]/Context
/*
* @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;
}
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @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);
}
// Part: OpenZeppelin/[email protected]/ReentrancyGuard
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @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;
}
}
// Part: SafeMathUpgradeable
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// Part: Initializable
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// Part: OpenZeppelin/[email protected]/Ownable
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @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");
}
}
}
// Part: ChainlinkFeedsRegistry
/**
* @title Chainlink Feeds Registry
* @notice Stores Chainlink feed addresses and provides getPrice() method to
* get the current price of a given token in USD
* @dev If a feed in USD exists, just use that. Otherwise multiply ETH/USD
* price with the price in ETH. For the price of USD, just return 1.
*/
contract ChainlinkFeedsRegistry is Ownable {
using Address for address;
using SafeERC20 for IERC20;
using SafeMath for uint256;
event AddFeed(bytes32 indexed currencyKey, string baseSymbol, string quoteSymbol, address feed);
// stringToBytes32("ETH")
bytes32 public constant ETH = 0x4554480000000000000000000000000000000000000000000000000000000000;
// stringToBytes32("USD")
bytes32 public constant USD = 0x5553440000000000000000000000000000000000000000000000000000000000;
mapping(bytes32 => address) public usdFeeds;
mapping(bytes32 => address) public ethFeeds;
/**
* @notice Get price in USD multiplied by 1e8. Returns 0 if no feed found.
* @param currencyKey Token symbol converted to bytes32
*/
function getPrice(bytes32 currencyKey) public view returns (uint256) {
address usdFeed = usdFeeds[currencyKey];
if (usdFeed != address(0)) {
// USD feeds are already scaled by 1e8 so don't need to scale again
return _latestPrice(usdFeed);
}
address ethFeed = ethFeeds[currencyKey];
address ethUsdFeed = usdFeeds[ETH];
if (ethFeed != address(0) && ethUsdFeed != address(0)) {
uint256 price1 = _latestPrice(ethFeed);
uint256 price2 = _latestPrice(ethUsdFeed);
// USD feeds are scaled by 1e8 and ETH feeds by 1e18 so need to
// divide by 1e18
return price1.mul(price2).div(1e18);
} else if (currencyKey == USD) {
// For USD just return a price of 1
return 1e8;
}
}
function _latestPrice(address feed) internal view returns (uint256) {
if (feed == address(0)) {
return 0;
}
(, int256 price, , , ) = AggregatorV3Interface(feed).latestRoundData();
return uint256(price);
}
/**
* @notice Add `symbol`/USD Chainlink feed to registry. Use a value of 0x0
* for `feed` to remove it from registry.
*/
function addUsdFeed(string memory symbol, address feed) external onlyOwner {
require(_latestPrice(feed) > 0, "Price should be > 0");
bytes32 currencyKey = stringToBytes32(symbol);
usdFeeds[currencyKey] = feed;
emit AddFeed(currencyKey, symbol, "USD", feed);
}
/**
* @notice Add `symbol`/ETH Chainlink feed to registry. Use a value of 0x0
* for `feed` to remove it from registry.
*/
function addEthFeed(string memory symbol, address feed) external onlyOwner {
require(_latestPrice(feed) > 0, "Price should be > 0");
bytes32 currencyKey = stringToBytes32(symbol);
ethFeeds[currencyKey] = feed;
emit AddFeed(currencyKey, symbol, "ETH", feed);
}
function getPriceFromSymbol(string memory symbol) external view returns (uint256) {
return getPrice(stringToBytes32(symbol));
}
function stringToBytes32(string memory s) public pure returns (bytes32 result) {
bytes memory b = bytes(s);
if (b.length == 0) {
return 0x0;
}
assembly {
result := mload(add(s, 32))
}
}
}
// Part: ContextUpgradeable
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// Part: ERC20Upgradeable
/**
* @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 ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable {
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;
/**
* @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.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
uint256[44] private __gap;
}
// Part: CubeToken
/**
* @title Cube Token
* @notice ERC20 token representing share of a cube token pool.
* @dev The logic for pricing and trading these tokens is in CubePool.
* This contract extends OpenZeppelin's ERC20 token contract with two
* modifications. Firstly it derives its name and symbol from the
* constructor parameters. Secondly it allows the parent pool to mint
* and burn tokens.
*/
contract CubeToken is ERC20Upgradeable {
address public cubePool;
string public spotSymbol;
bool public inverse;
/**
* @dev Initialize the contract. Should be called exactly once immediately
* after deployment. `_spotSymbol` and `_inverse` are stored for so that
* they can be read conveniently.
* @param _cubePool Address of CubePool contract which can mint and burn
* cube tokens.
* @param _spotSymbol Symbol of underying ERC20 token.
* @param _inverse True means 3x short token. False means 3x long token.
*/
function initialize(
address _cubePool,
string memory _spotSymbol,
bool _inverse
) external initializer {
// Example name: 3X Long BTC
// Example symbol: cubeBTC
string memory name = string(abi.encodePacked("3X ", _inverse ? "Short " : "Long ", _spotSymbol));
string memory symbol = string(abi.encodePacked(_inverse ? "inv" : "cube", _spotSymbol));
__ERC20_init(name, symbol);
cubePool = _cubePool;
spotSymbol = _spotSymbol;
inverse = _inverse;
}
function mint(address account, uint256 amount) external {
require(msg.sender == cubePool, "!cubePool");
_mint(account, amount);
}
function burn(address account, uint256 amount) external {
require(msg.sender == cubePool, "!cubePool");
_burn(account, amount);
}
}
// Part: CubePool
/**
* @title Cube Pool
* @notice Parimutuel pool where users can deposit ETH to mint cube tokens
* and burn them to withdraw ETH. Cube tokens represents a share of
* the pool and the pool share is adjusted continuously as the price
* of the underlying asset changes. Cube tokens such as cubeBTC
* approximately track BTC price ^ 3, while inverse cube tokens such
* as invBTC approximately track 1 / BTC price ^ 3.
*/
contract CubePool is ReentrancyGuard {
using Address for address;
using SafeERC20 for IERC20;
using SafeMath for uint256;
event DepositOrWithdraw(
CubeToken indexed cubeToken,
address indexed sender,
address indexed recipient,
bool isDeposit,
uint256 cubeTokenQuantity,
uint256 ethAmount,
uint256 protocolFees
);
event Update(CubeToken cubeToken, uint256 price);
event AddCubeToken(
CubeToken cubeToken,
string spotSymbol,
bool inverse,
bytes32 currencyKey,
uint256 initialSpotPrice
);
struct CubeTokenParams {
bytes32 currencyKey;
bool inverse;
bool depositPaused;
bool withdrawPaused;
bool updatePaused;
bool added; // always true
uint256 depositWithdrawFee;
uint256 maxPoolShare;
uint256 initialSpotPrice;
uint256 lastPrice;
uint256 lastUpdated;
}
uint256 public constant MIN_TOTAL_EQUITY = 1000;
ChainlinkFeedsRegistry public immutable feedsRegistry;
CubeToken public immutable cubeTokenImpl;
mapping(CubeToken => CubeTokenParams) public params;
mapping(string => mapping(bool => CubeToken)) public cubeTokensMap;
CubeToken[] public cubeTokens;
address public governance;
address public pendingGovernance;
address public guardian;
uint256 public protocolFee;
uint256 public maxPoolBalance;
bool public finalized;
uint256 public totalEquity;
uint256 public accruedProtocolFees;
/**
* @param _feedsRegistry The feed registry contract for fetching spot
* prices from Chainlink oracles
* @param _cubeTokenImpl Cube token template to be cloned when new cube
* tokens are added
*/
constructor(address _feedsRegistry, address _cubeTokenImpl) public {
feedsRegistry = ChainlinkFeedsRegistry(_feedsRegistry);
cubeTokenImpl = CubeToken(_cubeTokenImpl);
governance = msg.sender;
}
/**
* @notice Deposit ETH to mint cube tokens
* @dev Quantity of cube tokens minted is calculated from the amount of ETH
* attached with transaction
* @param cubeToken Which cube token to mint
* @param recipient Address that receives the cube tokens
* @return cubeTokensOut Quantity of cube tokens that were minted
*/
function deposit(CubeToken cubeToken, address recipient)
external
payable
nonReentrant
returns (uint256 cubeTokensOut)
{
CubeTokenParams storage _params = params[cubeToken];
require(_params.added, "Not added");
require(!_params.depositPaused, "Paused");
require(msg.value > 0, "msg.value should be > 0");
require(recipient != address(0), "Zero address");
(uint256 price, uint256 _totalEquity) = _priceAndTotalEquity(cubeToken);
_updatePrice(cubeToken, price);
uint256 fees = _mulFee(msg.value, _params.depositWithdrawFee);
uint256 ethIn = msg.value.sub(fees);
uint256 _poolBalance = poolBalance();
cubeTokensOut = _divPrice(ethIn, price, _totalEquity, _poolBalance.sub(msg.value));
totalEquity = _totalEquity.add(cubeTokensOut.mul(price));
uint256 protocolFees = _mulFee(fees, protocolFee);
accruedProtocolFees = accruedProtocolFees.add(protocolFees);
cubeToken.mint(recipient, cubeTokensOut);
if (_params.maxPoolShare > 0) {
uint256 equity = cubeToken.totalSupply().mul(price);
require(equity.mul(1e4) <= _params.maxPoolShare.mul(totalEquity), "Max pool share exceeded");
}
if (maxPoolBalance > 0) {
require(_poolBalance <= maxPoolBalance, "Max pool balance exceeded");
}
emit DepositOrWithdraw(cubeToken, msg.sender, recipient, true, cubeTokensOut, msg.value, protocolFees);
}
/**
* @notice Burn cube tokens to withdraw ETH
* @param cubeToken Which cube token to burn
* @param cubeTokensIn Quantity of cube tokens to burn
* @param recipient Address that receives the withdrawn ETH
* @return ethOut Amount of ETH withdrawn
*/
function withdraw(
CubeToken cubeToken,
uint256 cubeTokensIn,
address recipient
) external nonReentrant returns (uint256 ethOut) {
CubeTokenParams storage _params = params[cubeToken];
require(_params.added, "Not added");
require(!_params.withdrawPaused, "Paused");
require(cubeTokensIn > 0, "cubeTokensIn should be > 0");
require(recipient != address(0), "Zero address");
(uint256 price, uint256 _totalEquity) = _priceAndTotalEquity(cubeToken);
_updatePrice(cubeToken, price);
ethOut = _mulPrice(cubeTokensIn, price, _totalEquity, poolBalance());
uint256 fees = _mulFee(ethOut, _params.depositWithdrawFee);
ethOut = ethOut.sub(fees);
// Make sure pool size isn't too small, otherwise there could be
// rounding issues. Check total equity instead of pool balance since
// pool balance is increased again by fees going back into pool.
_totalEquity = _totalEquity.sub(cubeTokensIn.mul(price));
require(_totalEquity >= MIN_TOTAL_EQUITY, "Min total equity exceeded");
totalEquity = _totalEquity;
uint256 protocolFees = _mulFee(fees, protocolFee);
accruedProtocolFees = accruedProtocolFees.add(protocolFees);
cubeToken.burn(msg.sender, cubeTokensIn);
payable(recipient).transfer(ethOut);
emit DepositOrWithdraw(cubeToken, msg.sender, recipient, false, cubeTokensIn, ethOut, protocolFees);
}
/**
* @notice Update the stored cube token price and total equity. This is
* automatically called whenever there's a deposit or withdrawal for this
* cube token. However if this hasn't happened for a while, this method
* should be called by an external keeper so that the total equity doesn't
* get too far out of sync.
*/
function update(CubeToken cubeToken) public {
CubeTokenParams storage _params = params[cubeToken];
require(_params.added, "Not added");
if (!_params.updatePaused) {
(uint256 price, uint256 _totalEquity) = _priceAndTotalEquity(cubeToken);
_updatePrice(cubeToken, price);
totalEquity = _totalEquity;
}
}
/**
* @dev Update `lastPrice` and `lastUpdated` in params. Should be called
* whenever a new price is fetched from the oracle. Doesn't update if price
* updates are paused or if price hasn't changed.
*/
function _updatePrice(CubeToken cubeToken, uint256 price) internal {
CubeTokenParams storage _params = params[cubeToken];
if (!_params.updatePaused && price != _params.lastPrice) {
_params.lastPrice = price;
_params.lastUpdated = block.timestamp;
emit Update(cubeToken, price);
}
}
/**
* @notice Update all cube tokens which haven't been updated in the last
* `maxStaleTime` seconds. Should be called periodically by an external
* keeper so that the total equity doesn't get too far out of sync.
*/
function updateAll(uint256 maxStaleTime) external {
for (uint256 i = 0; i < cubeTokens.length; i = i.add(1)) {
CubeToken cubeToken = cubeTokens[i];
if (params[cubeToken].lastUpdated.add(maxStaleTime) <= block.timestamp) {
update(cubeToken);
}
}
}
/**
* @notice Add a new cube token. Can only be called by governance.
* @param spotSymbol Symbol of underlying token. Used to fetch oracle price
* @param inverse True means 3x short token. False means 3x long token.
* @param depositWithdrawFee Fee on deposits and withdrawals in basis points
* @param maxPoolShare Limit on share of the pool in basis points
* @return address Address of cube token that was added
*/
function addCubeToken(
string memory spotSymbol,
bool inverse,
uint256 depositWithdrawFee,
uint256 maxPoolShare
) external onlyGovernance returns (address) {
require(address(cubeTokensMap[spotSymbol][inverse]) == address(0), "Already added");
bytes32 salt = keccak256(abi.encodePacked(spotSymbol, inverse));
CubeToken cubeToken = CubeToken(Clones.cloneDeterministic(address(cubeTokenImpl), salt));
cubeToken.initialize(address(this), spotSymbol, inverse);
bytes32 currencyKey = feedsRegistry.stringToBytes32(spotSymbol);
uint256 spot = feedsRegistry.getPrice(currencyKey);
require(spot > 0, "Spot price should be > 0");
params[cubeToken] = CubeTokenParams({
currencyKey: currencyKey,
inverse: inverse,
depositPaused: false,
withdrawPaused: false,
updatePaused: false,
added: true,
depositWithdrawFee: depositWithdrawFee,
maxPoolShare: maxPoolShare,
initialSpotPrice: spot,
lastPrice: 0,
lastUpdated: 0
});
cubeTokensMap[spotSymbol][inverse] = cubeToken;
cubeTokens.push(cubeToken);
// Set `lastPrice` and `lastUpdated`
update(cubeToken);
assert(params[cubeToken].lastPrice > 0);
assert(params[cubeToken].lastUpdated > 0);
emit AddCubeToken(cubeToken, spotSymbol, inverse, currencyKey, spot);
return address(cubeToken);
}
/**
* @notice Balance of ETH in this contract that belongs to cube token
* holders. The remaining ETH are the accrued protocol fees that can be
* collected by governance.
*/
function poolBalance() public view returns (uint256) {
return address(this).balance.sub(accruedProtocolFees);
}
/**
* @notice Calculate price of a cube token in ETH multiplied by 1e18,
* excluding fees. This price applies to both depositing and withdrawing.
*/
function quote(CubeToken cubeToken) external view returns (uint256) {
(uint256 price, uint256 _totalEquity) = _priceAndTotalEquity(cubeToken);
return _mulPrice(1e18, price, _totalEquity, poolBalance());
}
/**
* @notice Calculate amount of cube tokens received by depositing `ethIn`
* ETH.
*/
function quoteDeposit(CubeToken cubeToken, uint256 ethIn) external view returns (uint256) {
(uint256 price, uint256 _totalEquity) = _priceAndTotalEquity(cubeToken);
uint256 fees = _mulFee(ethIn, params[cubeToken].depositWithdrawFee);
return _divPrice(ethIn.sub(fees), price, _totalEquity, poolBalance());
}
/**
* @notice Calculate ETH withdrawn when burning `cubeTokensIn` cube tokens.
*/
function quoteWithdraw(CubeToken cubeToken, uint256 cubeTokensIn) external view returns (uint256) {
(uint256 price, uint256 _totalEquity) = _priceAndTotalEquity(cubeToken);
uint256 ethOut = _mulPrice(cubeTokensIn, price, _totalEquity, poolBalance());
uint256 fees = _mulFee(ethOut, params[cubeToken].depositWithdrawFee);
return ethOut.sub(fees);
}
function numCubeTokens() external view returns (uint256) {
return cubeTokens.length;
}
/// @dev Calculate price and total equity from latest oracle price
function _priceAndTotalEquity(CubeToken cubeToken) internal view returns (uint256 price, uint256 _totalEquity) {
CubeTokenParams storage _params = params[cubeToken];
if (_params.updatePaused) {
return (_params.lastPrice, totalEquity);
}
uint256 spot = feedsRegistry.getPrice(_params.currencyKey);
// Divide by the spot price at the time the cube token was added.
// This helps the price not be too large or small which could cause
// overflow or rounding issues.
spot = spot.mul(1e6).div(_params.initialSpotPrice);
// Price is spot^3 or 1/spot^3. Its value is multiplied by 1e18.
if (_params.inverse) {
price = uint256(1e36).div(spot).div(spot).div(spot);
} else {
price = spot.mul(spot).mul(spot);
}
// Update total equity to reflect new price. Total equity is the sum of
// total supply * price over all cube tokens. Therefore, when the price
// of a cube token with total supply T changes from P1 to P2, the total
// equity needs to be increased by T * P2 - T * P1.
_totalEquity = totalEquity;
if (price != _params.lastPrice) {
uint256 _totalSupply = cubeToken.totalSupply();
uint256 equityBefore = _params.lastPrice.mul(_totalSupply);
uint256 equityAfter = price.mul(_totalSupply);
_totalEquity = _totalEquity.add(equityAfter).sub(equityBefore);
}
}
/// @dev Multiply cube token quantity by price and normalize to get ETH cost
function _mulPrice(
uint256 quantity,
uint256 price,
uint256 _totalEquity,
uint256 _poolBalance
) internal pure returns (uint256) {
return _totalEquity > 0 ? price.mul(quantity).mul(_poolBalance).div(_totalEquity) : quantity;
}
/// @dev Divide ETH amount by price and normalize to get cube token quantity
function _divPrice(
uint256 amount,
uint256 price,
uint256 _totalEquity,
uint256 _poolBalance
) internal pure returns (uint256) {
return _poolBalance > 0 ? amount.mul(_totalEquity).div(price).div(_poolBalance) : amount;
}
/// @dev Multiply an amount by a fee rate in basis points
function _mulFee(uint256 amount, uint256 fee) internal pure returns (uint256) {
return amount.mul(fee).div(1e4);
}
/**
* @notice Collect protocol fees accrued so far.
*/
function collectProtocolFees() external onlyGovernance {
payable(governance).transfer(accruedProtocolFees);
accruedProtocolFees = 0;
}
/**
* @notice Set protocol fee in basis points. This is the cut of fees that
* go to the protocol. For example a value of 2000 means 20% of fees go to
* the protocol and 80% go back into the pool.
*/
function setProtocolFee(uint256 _protocolFee) external onlyGovernance {
require(_protocolFee <= 1e4, "Protocol fee should be <= 100%");
protocolFee = _protocolFee;
}
/**
* @notice Set fee in basis points charged on each deposit and withdrawal.
* For example a value of 150 means a 1.5% fee. Some of this fee goes to
* the protocol while the rest goes back into the pool.
* @dev Theoretically this fee should be at least 3x the max deviation in
* the underlying Chainlink feed to avoid technical frontrunning.
*/
function setDepositWithdrawFee(CubeToken cubeToken, uint256 depositWithdrawFee) external onlyGovernance {
require(params[cubeToken].added, "Not added");
require(depositWithdrawFee < 1e4, "Fee should be < 100%");
params[cubeToken].depositWithdrawFee = depositWithdrawFee;
}
/**
* @notice Set max pool share for a cube token. Expressed in basis points.
* A value of 0 means no limit. This protects users from buying cube tokens
* with limited upside, as well as protecting the whole pool from the
* volatility of a single asset.
*/
function setMaxPoolShare(CubeToken cubeToken, uint256 maxPoolShare) external onlyGovernance {
require(params[cubeToken].added, "Not added");
require(maxPoolShare < 1e4, "Max pool share should be < 100%");
params[cubeToken].maxPoolShare = maxPoolShare;
}
/**
* @notice Set max pool balance for a guarded launch. This is a limit for
* the ETH balance deposited in the pool excluding accrued protocol fees.
* A value of 0 means no limit.
*/
function setMaxPoolBalance(uint256 _maxPoolBalance) external onlyGovernance {
maxPoolBalance = _maxPoolBalance;
}
/**
* @notice Governance address is not update until the new governance
* address has called acceptGovernance() to accept this responsibility.
*/
function setGovernance(address _governance) external onlyGovernance {
pendingGovernance = _governance;
}
/**
* @notice setGovernance() should be called by the existing governance
* address prior to calling this function.
*/
function acceptGovernance() external {
require(msg.sender == pendingGovernance, "!pendingGovernance");
governance = msg.sender;
}
/**
* @notice Set guardian. This is a trusted account with the powers to pause
* and unpause trading and to emergency withdraw. These protections are
* needed for example to protect funds if there is an oracle mispricing.
*/
function setGuardian(address _guardian) external onlyGovernance {
guardian = _guardian;
}
/**
* @notice Pause or unpause deposits withdrawals and price updates
*/
function setPaused(
CubeToken cubeToken,
bool depositPaused,
bool withdrawPaused,
bool updatePaused
) public onlyGovernanceOrGuardian {
require(params[cubeToken].added, "Not added");
params[cubeToken].depositPaused = depositPaused;
params[cubeToken].withdrawPaused = withdrawPaused;
params[cubeToken].updatePaused = updatePaused;
}
/**
* @notice Pause or unpause for all cube tokens
*/
function setAllPaused(
bool depositPaused,
bool withdrawPaused,
bool updatePaused
) external onlyGovernanceOrGuardian {
for (uint256 i = 0; i < cubeTokens.length; i = i.add(1)) {
setPaused(cubeTokens[i], depositPaused, withdrawPaused, updatePaused);
}
}
/**
* @notice Renounce emergency withdraw powers
*/
function finalize() external onlyGovernance {
require(!finalized, "Already finalized");
finalized = true;
}
/**
* @notice Transfer all ETH to governance in case of emergency. Cannot be called
* if already finalized
*/
function emergencyWithdraw() external onlyGovernanceOrGuardian {
require(!finalized, "Finalized");
payable(governance).transfer(address(this).balance);
}
modifier onlyGovernance {
require(msg.sender == governance, "!governance");
_;
}
modifier onlyGovernanceOrGuardian {
require(msg.sender == governance || msg.sender == guardian, "!governance and !guardian");
_;
}
receive() external payable {}
}
// File: CubePoolMulticall.sol
/**
* @title Cube Pool Multicall
* @notice Used by frontend to fetch cube pool data more conveniently
*/
contract CubePoolMulticall is Ownable, ReentrancyGuard {
function allCubeTokens(CubePool pool) external view returns (CubeToken[] memory cubeTokens) {
uint256 n = pool.numCubeTokens();
cubeTokens = new CubeToken[](n);
for (uint256 i = 0; i < n; i++) {
cubeTokens[i] = pool.cubeTokens(i);
}
}
function getCubeToken(CubePool pool, CubeToken cubeToken, address account)
external
view
returns (
string memory name,
string memory symbol,
uint256 totalSupply,
uint256 balance,
uint256 price,
uint256 spotPrice,
uint256 depositWithdrawFee,
uint256 maxPoolShare,
bool depositPaused,
bool withdrawPaused,
bool updatePaused
)
{
name = cubeToken.name();
symbol = cubeToken.symbol();
totalSupply = cubeToken.totalSupply();
balance = cubeToken.balanceOf(account);
bytes32 currencyKey;
(
currencyKey,
,
depositPaused,
withdrawPaused,
updatePaused,
,
depositWithdrawFee,
maxPoolShare,
,
,
) = pool.params(cubeToken);
price = pool.quote(cubeToken);
spotPrice = pool.feedsRegistry().getPrice(currencyKey);
}
}
|
* @notice Get price in USD multiplied by 1e8. Returns 0 if no feed found. @param currencyKey Token symbol converted to bytes32/ USD feeds are already scaled by 1e8 so don't need to scale again USD feeds are scaled by 1e8 and ETH feeds by 1e18 so need to divide by 1e18 For USD just return a price of 1
|
function getPrice(bytes32 currencyKey) public view returns (uint256) {
address usdFeed = usdFeeds[currencyKey];
if (usdFeed != address(0)) {
return _latestPrice(usdFeed);
}
address ethFeed = ethFeeds[currencyKey];
address ethUsdFeed = usdFeeds[ETH];
if (ethFeed != address(0) && ethUsdFeed != address(0)) {
uint256 price1 = _latestPrice(ethFeed);
uint256 price2 = _latestPrice(ethUsdFeed);
return price1.mul(price2).div(1e18);
return 1e8;
}
}
| 7,646,888
|
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./full_match/1/0x9b036F89B2B52fc735719E71a6d31B6c3633F4B4/sources/contracts/OraclePoS.sol
|
@notice Functino to return the latest day on which the Oracle is updated
|
function getLastIndexedDay() external view override returns (uint32) {
return lastIndexedDay;
}
| 17,148,412
|
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./partial_match/1/0x9DAdbc52D12e24b7D7dE68477c8478Aed4468DA6/sources/contracts/libraries/CrossDomainEnabledFast.sol
|
* @title CrossDomainEnabledFast @dev Helper contract for contracts performing cross-domain communications Compiler used: defined by inheriting contract Runtime target: defined by inheriting contract/ Messenger contract used to send and receive messages from the other domain.
|
contract CrossDomainEnabledFast {
address public senderMessenger;
address public relayerMessenger;
constructor(
address _senderMessenger,
address _relayerMessenger
pragma solidity >0.7.5;
import { ICrossDomainMessenger } from "@eth-optimism/contracts/contracts/libraries/bridge/ICrossDomainMessenger.sol";
) {
senderMessenger = _senderMessenger;
relayerMessenger = _relayerMessenger;
}
address _sourceDomainAccount
modifier onlyFromCrossDomainAccount(
) {
require(
msg.sender == address(getCrossDomainRelayerMessenger()),
"XCHAIN: messenger contract unauthenticated"
);
require(
getCrossDomainRelayerMessenger().xDomainMessageSender() == _sourceDomainAccount,
"XCHAIN: wrong sender of cross-domain message"
);
_;
}
function getCrossDomainSenderMessenger()
internal
virtual
returns(
ICrossDomainMessenger
)
{
return ICrossDomainMessenger(senderMessenger);
}
function getCrossDomainRelayerMessenger()
internal
virtual
returns(
ICrossDomainMessenger
)
{
return ICrossDomainMessenger(relayerMessenger);
}
function sendCrossDomainMessage(
address _crossDomainTarget,
uint32 _gasLimit,
bytes memory _data
) internal {
getCrossDomainSenderMessenger().sendMessage(_crossDomainTarget, _data, _gasLimit);
}
}
| 3,712,459
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.7.2;
pragma experimental ABIEncoderV2;
/**
* @title An Ether or token balance scanner
* @author Maarten Zuidhoorn
* @author Luit Hollander
*/
contract BalanceScanner {
/**
* @notice Get the Ether balance for all addresses specified
* @param addresses The addresses to get the Ether balance for
* @return balances The Ether balance for all addresses in the same order as specified
*/
function etherBalances(address[] calldata addresses) external view returns (uint256[] memory balances) {
balances = new uint256[](addresses.length);
for (uint256 i = 0; i < addresses.length; i++) {
balances[i] = addresses[i].balance;
}
}
/**
* @notice Get the ERC-20 token balance of `token` for all addresses specified
* @dev This does not check if the `token` address specified is actually an ERC-20 token
* @param addresses The addresses to get the token balance for
* @param token The address of the ERC-20 token contract
* @return balances The token balance for all addresses in the same order as specified
*/
function tokenBalances(address[] calldata addresses, address token)
external
view
returns (uint256[] memory balances)
{
balances = new uint256[](addresses.length);
for (uint256 i = 0; i < addresses.length; i++) {
balances[i] = tokenBalance(addresses[i], token);
}
}
/**
* @notice Get the ERC-20 token balances for multiple contracts, for multiple addresses
* @dev This does not check if the `token` address specified is actually an ERC-20 token
* @param addresses The addresses to get the token balances for
* @param contracts The addresses of the ERC-20 token contracts
* @return balances The token balances in the same order as the addresses specified
*/
function tokensBalances(address[] calldata addresses, address[] calldata contracts)
external
view
returns (uint256[][] memory balances)
{
balances = new uint256[][](addresses.length);
for (uint256 i = 0; i < addresses.length; i++) {
balances[i] = tokensBalance(addresses[i], contracts);
}
}
/**
* @notice Get the ERC-20 token balance from multiple contracts for a single owner
* @param owner The address of the token owner
* @param contracts The addresses of the ERC-20 token contracts
* @return balances The token balances in the same order as the addresses specified
*/
function tokensBalance(address owner, address[] calldata contracts) public view returns (uint256[] memory balances) {
balances = new uint256[](contracts.length);
for (uint256 i = 0; i < contracts.length; i++) {
balances[i] = tokenBalance(owner, contracts[i]);
}
}
/**
* @notice Get the ERC-20 token balance for a single contract
* @param owner The address of the token owner
* @param token The address of the ERC-20 token contract
* @return balance The token balance, or zero if the address is not a contract, or does not implement the `balanceOf`
function
*/
function tokenBalance(address owner, address token) private view returns (uint256 balance) {
uint256 size = codeSize(token);
if (size > 0) {
(bool success, bytes memory data) = token.staticcall(abi.encodeWithSignature("balanceOf(address)", owner));
if (success) {
(balance) = abi.decode(data, (uint256));
}
}
}
/**
* @notice Get code size of address
* @param _address The address to get code size from
* @return size Unsigned 256-bits integer
*/
function codeSize(address _address) private view returns (uint256 size) {
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(_address)
}
}
}
|
* @notice Get the Ether balance for all addresses specified @param addresses The addresses to get the Ether balance for @return balances The Ether balance for all addresses in the same order as specified/
|
function etherBalances(address[] calldata addresses) external view returns (uint256[] memory balances) {
balances = new uint256[](addresses.length);
for (uint256 i = 0; i < addresses.length; i++) {
balances[i] = addresses[i].balance;
}
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
/**
* @title Abstract prize split contract for adding unique award distribution to static addresses.
* @author Kames Geraghty (PoolTogether Inc)
*/
abstract contract PrizeSplit is OwnableUpgradeable {
using SafeMathUpgradeable for uint256;
PrizeSplitConfig[] internal _prizeSplits;
/**
* @notice The prize split configuration struct.
* @dev The prize split configuration struct used to award prize splits during distribution.
* @param target Address of recipient receiving the prize split distribution
* @param percentage Percentage of prize split using a 0-1000 range for single decimal precision i.e. 125 = 12.5%
* @param token Position of controlled token in prizePool.tokens (i.e. ticket or sponsorship)
*/
struct PrizeSplitConfig {
address target;
uint16 percentage;
uint8 token;
}
/**
* @notice Emitted when a PrizeSplitConfig config is added or updated.
* @dev Emitted when aPrizeSplitConfig config is added or updated in setPrizeSplits or setPrizeSplit.
* @param target Address of prize split recipient
* @param percentage Percentage of prize split. Must be between 0 and 1000 for single decimal precision
* @param token Index (0 or 1) of token in the prizePool.tokens mapping
* @param index Index of prize split in the prizeSplts array
*/
event PrizeSplitSet(address indexed target, uint16 percentage, uint8 token, uint256 index);
/**
* @notice Emitted when a PrizeSplitConfig config is removed.
* @dev Emitted when a PrizeSplitConfig config is removed from the _prizeSplits array.
* @param target Index of a previously active prize split config
*/
event PrizeSplitRemoved(uint256 indexed target);
/**
* @notice Mints ticket or sponsorship tokens to prize split recipient.
* @dev Mints ticket or sponsorship tokens to prize split recipient via the linked PrizePool contract.
* @param target Recipient of minted tokens
* @param amount Amount of minted tokens
* @param tokenIndex Index (0 or 1) of a token in the prizePool.tokens mapping
*/
function _awardPrizeSplitAmount(address target, uint256 amount, uint8 tokenIndex) virtual internal;
/**
* @notice Read all prize splits configs.
* @dev Read all PrizeSplitConfig structs stored in _prizeSplits.
* @return _prizeSplits Array of PrizeSplitConfig structs
*/
function prizeSplits() external view returns (PrizeSplitConfig[] memory) {
return _prizeSplits;
}
/**
* @notice Read prize split config from active PrizeSplits.
* @dev Read PrizeSplitConfig struct from _prizeSplits array.
* @param prizeSplitIndex Index position of PrizeSplitConfig
* @return PrizeSplitConfig Single prize split config
*/
function prizeSplit(uint256 prizeSplitIndex) external view returns (PrizeSplitConfig memory) {
return _prizeSplits[prizeSplitIndex];
}
/**
* @notice Set and remove prize split(s) configs.
* @dev Set and remove prize split configs by passing a new PrizeSplitConfig structs array. Will remove existing PrizeSplitConfig(s) if passed array length is less than existing _prizeSplits length.
* @param newPrizeSplits Array of PrizeSplitConfig structs
*/
function setPrizeSplits(PrizeSplitConfig[] calldata newPrizeSplits) external onlyOwner {
uint256 newPrizeSplitsLength = newPrizeSplits.length;
// Add and/or update prize split configs using newPrizeSplits PrizeSplitConfig structs array.
for (uint256 index = 0; index < newPrizeSplitsLength; index++) {
PrizeSplitConfig memory split = newPrizeSplits[index];
require(split.token <= 1, "MultipleWinners/invalid-prizesplit-token");
require(split.target != address(0), "MultipleWinners/invalid-prizesplit-target");
if (_prizeSplits.length <= index) {
_prizeSplits.push(split);
} else {
PrizeSplitConfig memory currentSplit = _prizeSplits[index];
if (split.target != currentSplit.target || split.percentage != currentSplit.percentage || split.token != currentSplit.token) {
_prizeSplits[index] = split;
} else {
continue;
}
}
// Emit the added/updated prize split config.
emit PrizeSplitSet(split.target, split.percentage, split.token, index);
}
// Remove old prize splits configs. Match storage _prizesSplits.length with the passed newPrizeSplits.length
while (_prizeSplits.length > newPrizeSplitsLength) {
uint256 _index = _prizeSplits.length.sub(1);
_prizeSplits.pop();
emit PrizeSplitRemoved(_index);
}
// Total prize split do not exceed 100%
uint256 totalPercentage = _totalPrizeSplitPercentageAmount();
require(totalPercentage <= 1000, "MultipleWinners/invalid-prizesplit-percentage-total");
}
/**
* @notice Updates a previously set prize split config.
* @dev Updates a prize split config by passing a new PrizeSplitConfig struct and current index position. Limited to contract owner.
* @param prizeStrategySplit PrizeSplitConfig config struct
* @param prizeSplitIndex Index position of PrizeSplitConfig to update
*/
function setPrizeSplit(PrizeSplitConfig memory prizeStrategySplit, uint8 prizeSplitIndex) external onlyOwner {
require(prizeSplitIndex < _prizeSplits.length, "MultipleWinners/nonexistent-prizesplit");
require(prizeStrategySplit.token <= 1, "MultipleWinners/invalid-prizesplit-token");
require(prizeStrategySplit.target != address(0), "MultipleWinners/invalid-prizesplit-target");
// Update the prize split config
_prizeSplits[prizeSplitIndex] = prizeStrategySplit;
// Total prize split do not exceed 100%
uint256 totalPercentage = _totalPrizeSplitPercentageAmount();
require(totalPercentage <= 1000, "MultipleWinners/invalid-prizesplit-percentage-total");
// Emit updated prize split config
emit PrizeSplitSet(prizeStrategySplit.target, prizeStrategySplit.percentage, prizeStrategySplit.token, prizeSplitIndex);
}
/**
* @notice Calculate single prize split distribution amount.
* @dev Calculate single prize split distribution amount using the total prize amount and prize split percentage.
* @param amount Total prize award distribution amount
* @param percentage Percentage with single decimal precision using 0-1000 ranges
*/
function _getPrizeSplitAmount(uint256 amount, uint16 percentage) internal pure returns (uint256) {
return (amount * percentage).div(1000);
}
/**
* @notice Calculates total prize split percentage amount.
* @dev Calculates total PrizeSplitConfig percentage(s) amount. Used to check the total does not exceed 100% of award distribution.
* @return Total prize split(s) percentage amount
*/
function _totalPrizeSplitPercentageAmount() internal view returns (uint256) {
uint256 _tempTotalPercentage;
uint256 prizeSplitsLength = _prizeSplits.length;
for (uint8 index = 0; index < prizeSplitsLength; index++) {
PrizeSplitConfig memory split = _prizeSplits[index];
_tempTotalPercentage = _tempTotalPercentage.add(split.percentage);
}
return _tempTotalPercentage;
}
/**
* @notice Distributes prize split(s).
* @dev Distributes prize split(s) by awarding ticket or sponsorship tokens.
* @param prize Starting prize award amount
* @return Total prize award distribution amount exlcuding the awarded prize split(s)
*/
function _distributePrizeSplits(uint256 prize) internal returns (uint256) {
// Store temporary total prize amount for multiple calculations using initial prize amount.
uint256 _prizeTemp = prize;
uint256 prizeSplitsLength = _prizeSplits.length;
for (uint256 index = 0; index < prizeSplitsLength; index++) {
PrizeSplitConfig memory split = _prizeSplits[index];
uint256 _splitAmount = _getPrizeSplitAmount(_prizeTemp, split.percentage);
// Award the prize split distribution amount.
_awardPrizeSplitAmount(split.target, _splitAmount, split.token);
// Update the remaining prize amount after distributing the prize split percentage.
prize = prize.sub(_splitAmount);
}
return prize;
}
}
|
* @notice Updates a previously set prize split config. @dev Updates a prize split config by passing a new PrizeSplitConfig struct and current index position. Limited to contract owner. @param prizeStrategySplit PrizeSplitConfig config struct @param prizeSplitIndex Index position of PrizeSplitConfig to update/ Update the prize split config Total prize split do not exceed 100% Emit updated prize split config
|
function setPrizeSplit(PrizeSplitConfig memory prizeStrategySplit, uint8 prizeSplitIndex) external onlyOwner {
require(prizeSplitIndex < _prizeSplits.length, "MultipleWinners/nonexistent-prizesplit");
require(prizeStrategySplit.token <= 1, "MultipleWinners/invalid-prizesplit-token");
require(prizeStrategySplit.target != address(0), "MultipleWinners/invalid-prizesplit-target");
_prizeSplits[prizeSplitIndex] = prizeStrategySplit;
uint256 totalPercentage = _totalPrizeSplitPercentageAmount();
require(totalPercentage <= 1000, "MultipleWinners/invalid-prizesplit-percentage-total");
emit PrizeSplitSet(prizeStrategySplit.target, prizeStrategySplit.percentage, prizeStrategySplit.token, prizeSplitIndex);
}
| 7,325,416
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pragma solidity ^ 0.4 .25;
import "../node_modules/openzeppelin-solidity/contracts/math/SafeMath.sol";
contract FlightSuretyApp {
using SafeMath
for uint256;
//Data Variables
FlightSuretyData flightSuretyData;
// Flight status codes
uint8 private constant STATUS_CODE_UNKNOWN = 0;
uint8 private constant STATUS_CODE_ON_TIME = 10;
uint8 private constant STATUS_CODE_LATE_AIRLINE = 20;
uint8 private constant STATUS_CODE_LATE_WEATHER = 30;
uint8 private constant STATUS_CODE_LATE_TECHNICAL = 40;
uint8 private constant STATUS_CODE_LATE_OTHER = 50;
// Account used to deploy contract
address private contractOwner;
struct Flight {
bool isRegistered;
uint8 statusCode;
uint256 updatedTimestamp;
address airline;
address[] insuredAddresses;
mapping(bytes32 => PurchasedInsurance) insurance;
}
mapping(bytes32 => Flight) private flights;
struct PurchasedInsurance {
uint256 purchaseAmount;
address owner;
}
struct Accounts {
uint256 creditAmount;
}
mapping(address => Accounts) account;
bool isOperationalFlag;
//Function Modifiers
// // Modify to call data contract's status
modifier requireIsOperational() {
require(isOperationalFlag == true, "Contract is currently not operational");
_;
}
//Modifier to make sure flight is registered
modifier requireFlightRegistered(bytes32 flight) {
bool registered = isFlightRegistered(flight);
require(registered == true, "Flight must be registered in order to purchase insurance");
_;
}
//Modifier to make sure flight is not registered
modifier requireFlightNotRegistered(bytes32 flight) {
bool registered = isFlightRegistered(flight);
require(registered == false, "Flight must not already be registered");
_;
}
//Modifier that purchaser has not already purchased insurance
modifier requireNewPurchase(bytes32 flight) {
require(flights[flight].insurance[flight].owner == address(0), "Flight insurance has already been purchased by buyer");
_;
}
//Modifier that checks if a submitted ether value is greater than 0
modifier requireEtherMoreThanZero() {
require(msg.value > 0 ether, "Ether required must be greater than zero.");
_;
}
//Modifier that checks if a submitted ether value is less or equal to 1
modifier requireEtherNoMoreThanOneEther() {
require(msg.value <= 1 ether, "Ether required must be less or equal to 1.");
_;
}
//Modifier that checks if a submitted ether value is equal to 10 ether
modifier requireEtherEqualTo10() {
require(msg.value == 10 ether, "Ether required must be 10.");
_;
}
//Modifier that makes sure status code is unknown
modifier statusCodeIsUnknown(bytes32 flight) {
require(flights[flight].statusCode == STATUS_CODE_UNKNOWN, "Status code must be unknown");
_;
}
//Constructor
constructor(address dataContract) public {
contractOwner = msg.sender;
//airlinesRegistered = 0;
flightSuretyData = FlightSuretyData(dataContract);
flightSuretyData.registerInitialAirline();
isOperationalFlag = true;
}
//Utility Functions
function isOperational() public view returns(bool) {
return isOperationalFlag;
}
//Smart Contract Functions
//Add an airline to the registration queue
function registerAirline(address airline) public requireIsOperational {
flightSuretyData.registerAirline(airline);
}
function fundAirline() public payable requireEtherEqualTo10 {
flightSuretyData.fundAirline();
}
//Register a future flight for insuring.
function registerFlight(bytes32 flight, uint256 timeStamp, address airlineAddress) public requireIsOperational requireFlightNotRegistered(flight) {
//TODO: track airline with flight
Flight memory newFlight = Flight(true, 0, timeStamp, contractOwner, new address[](0));
flights[flight] = newFlight;
}
function isFlightRegistered(bytes32 flight) public view returns(bool) {
bool isRegistered = flights[flight].updatedTimestamp != 0;
return isRegistered;
}
function buy(bytes32 flight) public payable requireIsOperational requireFlightRegistered(flight) requireNewPurchase(flight) requireEtherMoreThanZero requireEtherNoMoreThanOneEther {
address buyerAddress = msg.sender;
PurchasedInsurance memory newInsurance = PurchasedInsurance(msg.value, buyerAddress);
flights[flight].insurance[flight] = newInsurance;
flights[flight].insuredAddresses.push(buyerAddress);
}
//function creditInsurees(bytes32 flight, address insuredAddress) payable returns(uint256) {
function creditInsurees(bytes32 flight, address insuredAddress) returns(uint256) {
//multiply the purchase amount by 1.5
uint256 returnAmount = flights[flight].insurance[flight].purchaseAmount.mul(3).div(2);
account[insuredAddress].creditAmount = returnAmount.add(account[insuredAddress].creditAmount);
return returnAmount;
}
function returnedPurchasedAmount(bytes32 flight) public view returns(uint256) {
return flights[flight].insurance[flight].purchaseAmount;
}
function returnCreditAmount() public view returns(uint256) {
return account[msg.sender].creditAmount;
}
function withdrawl() public requireIsOperational {
require(account[msg.sender].creditAmount > 0);
uint256 prev = account[msg.sender].creditAmount;
account[msg.sender].creditAmount = 0;
msg.sender.transfer(prev);
}
//Called after oracle has updated flight status
function processFlightStatus(address airline, bytes32 flight, uint256 timestamp, uint8 statusCode) internal statusCodeIsUnknown(flight) {
flights[flight].statusCode = statusCode;
if (statusCode == STATUS_CODE_LATE_AIRLINE) {
for (uint i = 0; i < flights[flight].insuredAddresses.length; i++) {
creditInsurees(flight, flights[flight].insuredAddresses[i]);
}
}
}
// Generate a request for oracles to fetch flight information
function fetchFlightStatus(address airline, string flight, uint256 timestamp) external {
uint8 index = getRandomIndex(msg.sender);
// Generate a unique key for storing the request
bytes32 key = keccak256(abi.encodePacked(index, airline, flight, timestamp));
oracleResponses[key] = ResponseInfo({
requester: msg.sender,
isOpen: true
});
emit OracleRequest(index, airline, flight, timestamp);
}
// region ORACLE MANAGEMENT
// Incremented to add pseudo-randomness at various points
uint8 private nonce = 0;
// Fee to be paid when registering oracle
uint256 public constant REGISTRATION_FEE = 1 ether;
// Number of oracles that must respond for valid status
uint256 private constant MIN_RESPONSES = 3;
struct Oracle {
bool isRegistered;
uint8[3] indexes;
}
// Track all registered oracles
mapping(address => Oracle) private oracles;
// Model for responses from oracles
struct ResponseInfo {
address requester; // Account that requested status
bool isOpen; // If open, oracle responses are accepted
mapping(uint8 => address[]) responses; // Mapping key is the status code reported
// This lets us group responses and identify
// the response that majority of the oracles
}
// Track all oracle responses
// Key = hash(index, flight, timestamp)
mapping(bytes32 => ResponseInfo) private oracleResponses;
// Event fired each time an oracle submits a response
event OracleRegistered();
event FlightStatusInfo(address airline, bytes32 flight, uint256 timestamp, uint8 status);
event OracleReport(address airline, bytes32 flight, uint256 timestamp, uint8 status);
// Event fired when flight status request is submitted
// Oracles track this and if they have a matching index
// they fetch data and submit a response
event OracleRequest(uint8 index, address airline, string flight, uint256 timestamp);
event CreditAccount(bytes32 flight, address insuredAddress);
// Register an oracle with the contract
function registerOracle() external payable {
// Require registration fee
require(msg.value >= REGISTRATION_FEE, "Registration fee is required");
uint8[3] memory indexes = generateIndexes(msg.sender);
oracles[msg.sender] = Oracle({
isRegistered: true,
indexes: indexes
});
emit OracleRegistered();
}
function getMyIndexes() view external returns(uint8[3]) {
require(oracles[msg.sender].isRegistered, "Not registered as an oracle");
return oracles[msg.sender].indexes;
}
// Called by oracle when a response is available to an outstanding request
// For the response to be accepted, there must be a pending request that is open
// and matches one of the three Indexes randomly assigned to the oracle at the
// time of registration (i.e. uninvited oracles are not welcome)
function submitOracleResponse(uint8 index, address airline, bytes32 flight, uint256 timestamp, uint8 statusCode) external {
require((oracles[msg.sender].indexes[0] == index) || (oracles[msg.sender].indexes[1] == index) || (oracles[msg.sender].indexes[2] == index), "Index does not match oracle request");
bytes32 key = keccak256(abi.encodePacked(index, airline, flight, timestamp));
//require(oracleResponses[key].isOpen, "Flight or timestamp do not match oracle request");
oracleResponses[key].responses[statusCode].push(msg.sender);
// Information isn't considered verified until at least MIN_RESPONSES
// oracles respond with the *** same *** information
emit OracleReport(airline, flight, timestamp, statusCode);
if (oracleResponses[key].responses[statusCode].length >= MIN_RESPONSES) {
emit FlightStatusInfo(airline, flight, timestamp, statusCode);
// Handle flight status as appropriate
processFlightStatus(airline, flight, timestamp, statusCode);
}
}
function getFlightKey(address airline, string flight, uint256 timestamp) pure internal returns(bytes32) {
return keccak256(abi.encodePacked(airline, flight, timestamp));
}
// Returns array of three non-duplicating integers from 0-9
function generateIndexes(address iaccount) internal returns(uint8[3]) {
uint8[3] memory indexes;
indexes[0] = getRandomIndex(iaccount);
indexes[1] = indexes[0];
while (indexes[1] == indexes[0]) {
indexes[1] = getRandomIndex(iaccount);
}
indexes[2] = indexes[1];
while ((indexes[2] == indexes[0]) || (indexes[2] == indexes[1])) {
indexes[2] = getRandomIndex(iaccount);
}
return indexes;
}
// Returns array of three non-duplicating integers from 0-9
function getRandomIndex(address iaccount) internal returns(uint8) {
uint8 maxValue = 10;
// Pseudo random number...the incrementing nonce adds variation
uint8 random = uint8(uint256(keccak256(abi.encodePacked(blockhash(block.number - nonce++), iaccount))) % maxValue);
if (nonce > 250) {
nonce = 0; // Can only fetch blockhashes for last 256 blocks so we adapt
}
return random;
}
// endregion
}
//Data Interface
contract FlightSuretyData {
function registerAirline(address airlineAddress) external;
function registerInitialAirline() external;
function returnInitialAirline() external returns(address);
function fundAirline() external payable;
}
|
Model for responses from oracles This lets us group responses and identify the response that majority of the oracles
|
struct ResponseInfo {
}
event FlightStatusInfo(address airline, bytes32 flight, uint256 timestamp, uint8 status);
event OracleReport(address airline, bytes32 flight, uint256 timestamp, uint8 status);
event CreditAccount(bytes32 flight, address insuredAddress);
| 12,783,981
|
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// SPDX-License-Identifier: MIT
/*
This is a smart contract to implement the functionality of Decentralised Domain Authentication on Ethereum blockchain.
Authors : Mohammed Sufiyan Aman, Riyanchhi Agrawal, Shakshi Pandey, Shehyaaz Khan Nayazi
*/
pragma solidity ^0.6.0;
import "./CheckAbstract.sol";
import "./DRPAbstract.sol";
contract DDA {
/* the log ID of the CT logs trusted by DDA are stored in ctLogsID array */
bytes32[] public ctLogIDs;
uint24 public constant maximum_merge_delay = 86400;
/* contract owner address */
address payable public contractOwner;
/* Parameters used to determine various payments in this contract.
The common denominator for all parameters is 10
*/
uint8 constant private escrow = 3; // escrow parameter(alpha) = 30% (NOTE: escrow parameter > 25 % given the below set of parameters)
uint8 constant private termination_parameter = 3; // termination parameter(delta) = 30%
uint8 constant private internal_misbehaviour = 9; // internal misbehaviour payment(mi) = 90%
uint8 constant private contract_fund_payment = 3; // contract fund payment(f) = 30%
uint8 constant private termination_payment = 4; // termination payment(t) = 40%
uint8 constant private total_funds = internal_misbehaviour + termination_payment + contract_fund_payment;
uint256 constant public client_registration_fee = 0.001 ether;
uint256 constant public domain_registration_fee = 0.01 ether;
uint256 constant public update_fee = 0.001 ether;
/* Client Check Policy definition */
struct CCP {
bytes32 clientName;
uint256 validFrom;
uint256 validTo;
address payable clientAddress;
address checkContract;
uint8 version;
}
/* Domain Reaction Policy definition */
struct DRP {
bytes32 domainName;
bytes32 issuerName;
uint256 validFrom;
uint256 validTo;
address payable domainAddress;
address payable reactContract;
uint8 version;
}
struct Client {
CCP ccp;
address[] purchasedDRP; // list of domain addresses whose DRP has been purchased
mapping(address => uint256) lastChecked;
}
struct Domain {
DRP drp;
uint256 drpPrice;
uint256 escrowedAmount;
}
/* an associative array of clients registered in the system */
mapping(address => Client) clients;
/* an array of domains registered in the system */
address[] public registeredDomains;
mapping(bytes32 => uint256) public registeredDomainNames;
mapping(address => Domain) domains;
/* events for various operations */
event Registered(address _addr);
event Updated(address _addr);
event DRPpurchased(address _clientAddr, bytes32 _domainName);
event CertChecked(address _clientAddr, bytes32 _domainName, bool _certValid);
event DRPExpired(bytes32 _domainName);
event DRPDeleted(address _domainAddr);
constructor(bytes32[] memory _ctLogIDs) public {
contractOwner = msg.sender;
for(uint16 i = 0; i < _ctLogIDs.length; i++){
ctLogIDs.push(_ctLogIDs[i]);
}
}
// this fallback function allows the contract to receive ether
receive() external payable{
}
function registerClient(
bytes32 _name,
uint256 _validFrom,
uint256 _validTo,
address _checkContract,
uint8 _version
) external payable{
require(clients[msg.sender].ccp.clientName == "" &&
_name != "" &&
_validTo > _validFrom &&
CheckAbstract(_checkContract).verifyCCP(msg.sender, _checkContract) &&
msg.value == client_registration_fee
);
clients[msg.sender].ccp = CCP(_name, _validFrom, _validTo, msg.sender, _checkContract, _version);
// pass CT logs to Check Contract
CheckAbstract(_checkContract).setCTLogs(ctLogIDs, maximum_merge_delay);
emit Registered(msg.sender);
}
function updateClient(
uint256 _validTo
) external payable{
require(clients[msg.sender].ccp.clientName != "" &&
_validTo > clients[msg.sender].ccp.validFrom &&
msg.value == update_fee
);
clients[msg.sender].ccp.validTo = _validTo;
emit Updated(msg.sender);
}
function registerDomain(
bytes32 _domainName,
bytes32 _issuerName,
uint256 _validFrom,
uint256 _validTo,
uint256 _drpPrice,
address payable _reactContract,
uint8 _version
) external payable{
require(registeredDomainNames[_domainName] == 0 &&
_domainName != "" &&
_issuerName != "" &&
_validTo > _validFrom &&
DRPAbstract(_reactContract).verifyDRP(msg.sender, _reactContract) &&
msg.value == (domain_registration_fee + (_drpPrice/10)*(internal_misbehaviour + contract_fund_payment))
);
domains[msg.sender].drp = DRP(_domainName, _issuerName, _validFrom, _validTo, msg.sender, _reactContract, _version);
domains[msg.sender].drpPrice = _drpPrice;
registeredDomains.push(msg.sender);
registeredDomainNames[_domainName] = registeredDomains.length; // add domain name to list of registered addresses
// tranfer (_drpPrice/10)*(internal_misbehaviour + contract_fund_payment ether to _reactContract, this is to ensure the _reactContract has sufficient balance
_reactContract.transfer((_drpPrice/10)*(internal_misbehaviour + contract_fund_payment));
emit Registered(msg.sender);
}
function updateDomain(
bytes32 _issuerName,
uint256 _validTo
) external payable{
require(domains[msg.sender].drp.domainName != "" &&
_issuerName != "" &&
_validTo > domains[msg.sender].drp.validFrom &&
msg.value == update_fee
);
domains[msg.sender].drp.issuerName = _issuerName;
domains[msg.sender].drp.validTo = _validTo;
emit Updated(msg.sender);
}
function purchaseDRP(address payable _domainAddr) external payable {
Domain memory domain = domains[_domainAddr];
require(clients[msg.sender].ccp.clientName != "" &&
domain.drp.reactContract != address(0) &&
msg.value == domain.drpPrice
);
// add DRP to client drp list
clients[msg.sender].purchasedDRP.push(_domainAddr);
clients[msg.sender].lastChecked[_domainAddr] = 1; // this indicates that the DRP was purchased, but is not checked
// transfer amount to domain address in DRP
uint256 escrowAmount = (domain.drpPrice/100) * escrow * total_funds;
domains[_domainAddr].escrowedAmount += escrowAmount;
_domainAddr.transfer(domain.drpPrice - escrowAmount);
emit DRPpurchased(msg.sender, domain.drp.domainName);
}
function checkCertificate(
uint256 _drpIndex,
bytes32[] calldata _sctLogID,
uint256[] calldata _sctTimestamp,
uint256 _certValidFrom,
uint256 _certValidTo,
bytes32 _ocspRes
) external {
CCP memory ccp = clients[msg.sender].ccp;
Domain memory domain = domains[clients[msg.sender].purchasedDRP[_drpIndex]];
DRPAbstract reactContract = DRPAbstract(domain.drp.reactContract);
require(ccp.validTo >= now &&
domain.drp.validTo >= now &&
domain.drp.reactContract != address(0)
);
bool status = CheckAbstract(ccp.checkContract).check(_sctLogID, _sctTimestamp, _certValidFrom, _certValidTo, _ocspRes);
if(!status){ // invalid certificate detected
reactContract.trigger(
domain.drpPrice,
internal_misbehaviour,
contract_fund_payment
);
uint256 misbehaviour_payment = (domain.drpPrice / 10)*internal_misbehaviour;
// delete drp from drpList
deleteDRPFromClientList(ccp.clientAddress, _drpIndex);
// terminate DRP
uint256 termination_payment_client = (domain.drpPrice/10)*(termination_parameter) +
((domain.drpPrice/10)*(domain.drp.validTo - now)/(domain.drp.validTo - domain.drp.validFrom))*(termination_payment - termination_parameter);
// set reaction contract to empty address
domains[domain.drp.domainAddress].drp.reactContract = address(0);
// reduce domain's escrowed amount
domains[domain.drp.domainAddress].escrowedAmount -= termination_payment_client;
// transfer ether to client
msg.sender.transfer(misbehaviour_payment + termination_payment_client);
emit CertChecked(msg.sender, domain.drp.domainName, status);
}
else{
clients[ccp.clientAddress].lastChecked[domain.drp.domainAddress] = now;
emit CertChecked(msg.sender, domain.drp.domainName, status);
}
}
/* delete DRP from client DRP list */
function deleteDRPFromClientList(address _clientAddr, uint256 _drpIndex) public{
require(clients[_clientAddr].ccp.clientName != "");
uint256 drpListLength = clients[_clientAddr].purchasedDRP.length;
address domainAddr = clients[_clientAddr].purchasedDRP[_drpIndex];
clients[_clientAddr].purchasedDRP[_drpIndex] = clients[_clientAddr].purchasedDRP[drpListLength - 1];
clients[_clientAddr].purchasedDRP.pop(); // pop last element of array
delete clients[_clientAddr].lastChecked[domainAddr];
emit DRPDeleted(domainAddr);
}
/* function to expire DRP and delete it */
function expireDRP() external{
require(now > domains[msg.sender].drp.validTo); // Domain can expire DRP only after DRP validity has ended
Domain memory domain = domains[msg.sender];
// transfer escrowed amount to domain
uint256 escrowAmount = domains[msg.sender].escrowedAmount;
if(domain.drp.reactContract != address(0)){
// domains DRP has not been triggered by client
DRPAbstract(domain.drp.reactContract).trigger(
domain.drpPrice,
internal_misbehaviour,
contract_fund_payment
);
escrowAmount = escrowAmount + (domain.drpPrice / 10)*(internal_misbehaviour + contract_fund_payment);
}
// delete DRP from domains
registeredDomains[registeredDomainNames[domain.drp.domainName] - 1] = registeredDomains[registeredDomains.length - 1];
delete domains[msg.sender];
delete registeredDomainNames[domain.drp.domainName];
registeredDomains.pop(); // pop last element of array
msg.sender.transfer(escrowAmount);
emit DRPExpired(domain.drp.domainName);
}
/* Getter functions */
function isClientRegistered() external view returns(bool){
return clients[msg.sender].ccp.clientName != "";
}
function isDomainRegistered() external view returns(bool){
return domains[msg.sender].drp.domainName != "";
}
/* get client details */
function getClientDetails() external view returns(bytes32, uint256, uint256, address, address){
CCP memory ccp = clients[msg.sender].ccp;
return (
ccp.clientName,
ccp.validFrom,
ccp.validTo,
ccp.clientAddress,
ccp.checkContract
);
}
/* get domain details */
function getDomainDetails() external view returns(bytes32, bytes32, uint256, uint256, uint256, address, address, uint256){
Domain memory domain = domains[msg.sender];
return (
domain.drp.domainName,
domain.drp.issuerName,
domain.drp.validFrom,
domain.drp.validTo,
domain.drpPrice,
domain.drp.domainAddress,
domain.drp.reactContract,
domain.escrowedAmount
);
}
/* get details needed to purchase a DRP */
function getDRPDetails(uint256 _drpIndex) external view returns(bytes32, uint256, address){
Domain memory domain = domains[registeredDomains[_drpIndex]];
if(domain.drp.validTo >= now && domain.drp.reactContract != address(0) && clients[msg.sender].lastChecked[domain.drp.domainAddress] == 0)
return (
domain.drp.domainName,
domain.drpPrice,
domain.drp.domainAddress
);
}
/* get client drp list length */
function getClientDRPListLength() external view returns(uint256){
return clients[msg.sender].purchasedDRP.length;
}
/* get number of registered domains */
function getNumDRP() external view returns(uint256){
return registeredDomains.length;
}
/* get client DRP list details */
function getClientDRPList(uint256 _drpIndex) external view returns(bytes32, uint256, uint256, uint256, uint256){
Domain memory domain = domains[clients[msg.sender].purchasedDRP[_drpIndex]];
if(domain.drp.validTo >= now) // return those DRPs that are still valid
return (
domain.drp.domainName,
domain.drp.validFrom,
domain.drp.validTo,
domain.drpPrice,
clients[msg.sender].lastChecked[domain.drp.domainAddress]
);
}
/* get CCP status */
function getCCPStatus() external view returns(bool, bool){
CCP memory ccp = clients[msg.sender].ccp;
return (ccp.validTo >= now, ccp.checkContract != address(0)) ;
}
/* get DRP status */
function getDRPStatus() external view returns(bool, bool){
DRP memory drp = domains[msg.sender].drp;
return (drp.validTo >= now, drp.reactContract != address(0));
}
}
|
internal misbehaviour payment(mi) = 90%
|
uint8 constant private internal_misbehaviour = 9;
| 5,369,834
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./full_match/335/0x0f187eF0E6AD1993bE507e3Bdc01e1FB86db9F31/sources/contracts/DarkMarketAuction.sol
|
Total incentives paid to bidders who are outbid
|
uint256 totalIncentives;
| 7,098,787
|
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./full_match/5/0x54FFCE9bE0C17840103e5b28408932A2C6cC7ED4/sources/contracts/FiveDollarRenewalController.sol
|
Convert the unit price from USD to Wei.
|
function rentPrice(bytes memory name, uint256 duration)
public
view
override (BaseRenewalController, IRenewalController)
returns (uint256)
{
return usdToWei(dollarsPerSecond * duration);
}
| 7,064,032
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./full_match/84531/0xc2AFA9372f6Aba05961Ba35C017f8a4b1790C466/sources/ERC20.sol
|
* @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");
require(_totalSupply+amount<=_maxTotalSupply, "ERC20: mint amount exceeds maxTotalSupply");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
| 14,313,647
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/**
░█████╗░██╗░░░░░██╗░░░░░ ░██████╗████████╗░█████╗░██████╗░░██████╗ ████████╗░█████╗░██╗░░██╗███████╗███╗░░██╗
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██╔══██║██║░░░░░██║░░░░░ ░╚═══██╗░░░██║░░░██╔══██║██╔══██╗░╚═══██╗ ░░░██║░░░██║░░██║██╔═██╗░██╔══╝░░██║╚████║
██║░░██║███████╗███████╗ ██████╔╝░░░██║░░░██║░░██║██║░░██║██████╔╝ ░░░██║░░░╚█████╔╝██║░╚██╗███████╗██║░╚███║
╚═╝░░╚═╝╚══════╝╚══════╝ ╚═════╝░░░░╚═╝░░░╚═╝░░╚═╝╚═╝░░╚═╝╚═════╝░ ░░░╚═╝░░░░╚════╝░╚═╝░░╚═╝╚══════╝╚═╝░░╚══╝
https://t.me/AllStarsCHAMPS
https://twitter.com/AllStarsToken
/**
/**
* @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;
}
}
////// lib/openzeppelin-contracts/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
/* pragma solidity ^0.8.0; */
/* import "../utils/Context.sol"; */
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)
/* pragma solidity ^0.8.0; */
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `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);
}
////// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol)
/* pragma solidity ^0.8.0; */
/* import "../IERC20.sol"; */
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
////// lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol)
/* 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 {}
}
////// lib/openzeppelin-contracts/contracts/utils/math/SafeMath.sol
// OpenZeppelin Contracts v4.4.0 (utils/math/SafeMath.sol)
/* pragma solidity ^0.8.0; */
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
////// src/IUniswapV2Factory.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
////// src/IUniswapV2Pair.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 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 (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 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 (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
////// src/IUniswapV2Router02.sol
/* pragma solidity 0.8.10; */
/* pragma experimental ABIEncoderV2; */
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
/* pragma solidity >=0.8.10; */
/* import {IUniswapV2Router02} from "./IUniswapV2Router02.sol"; */
/* import {IUniswapV2Factory} from "./IUniswapV2Factory.sol"; */
/* import {IUniswapV2Pair} from "./IUniswapV2Pair.sol"; */
/* import {IERC20} from "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol"; */
/* import {ERC20} from "lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol"; */
/* import {Ownable} from "lib/openzeppelin-contracts/contracts/access/Ownable.sol"; */
/* import {SafeMath} from "lib/openzeppelin-contracts/contracts/utils/math/SafeMath.sol"; */
contract CHAMPS is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public ecosystemWallet;
address public charityWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 25; // 25 = .25%
bool public lpBurnEnabled = true;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyEcosystemFee;
uint256 public buyLiquidityFee;
uint256 public buyCharityFee;
uint256 public sellTotalFees;
uint256 public sellEcosystemFee;
uint256 public sellLiquidityFee;
uint256 public sellCharityFee;
uint256 public tokensForEcosystem;
uint256 public tokensForLiquidity;
uint256 public tokensForCharity;
/******************/
// exlcude from fees and max transaction amount
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping(address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(
address indexed newAddress,
address indexed oldAddress
);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event ecosystemWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event charityWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("All Stars Token", "CHAMPS") {
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 _buyEcosystemFee = 7;
uint256 _buyLiquidityFee = 2;
uint256 _buyCharityFee = 1;
uint256 _sellEcosystemFee = 15;
uint256 _sellLiquidityFee = 4;
uint256 _sellCharityFee = 1;
uint256 totalSupply = 1_000_000_000 * 1e18;
maxTransactionAmount = 1_000_000 * 1e18; // 1% from total supply maxTransactionAmountTxn
maxWallet = 10_000_000 * 1e18; // 1% from total supply maxWallet
swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet
buyEcosystemFee = _buyEcosystemFee;
buyLiquidityFee = _buyLiquidityFee;
buyCharityFee = _buyCharityFee;
buyTotalFees = buyEcosystemFee + buyLiquidityFee + buyCharityFee;
sellEcosystemFee = _sellEcosystemFee;
sellLiquidityFee = _sellLiquidityFee;
sellCharityFee = _sellCharityFee;
sellTotalFees = sellEcosystemFee + sellLiquidityFee + sellCharityFee;
ecosystemWallet = address(0x07429986a06a7C54B79a11815A9276277B416ae9); // set as marketing wallet
charityWallet = address(0x63E32B69224ab92b00141a9862e7355a4AB4ccf1); // set as dev wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool) {
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool) {
transferDelayEnabled = false;
return true;
}
// change the minimum amount of tokens to sell from fees
function updateSwapTokensAtAmount(uint256 newAmount)
external
onlyOwner
returns (bool)
{
require(
newAmount >= (totalSupply() * 1) / 100000,
"Swap amount cannot be lower than 0.001% total supply."
);
require(
newAmount <= (totalSupply() * 5) / 1000,
"Swap amount cannot be higher than 0.5% total supply."
);
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000) / 1e18,
"Cannot set maxTransactionAmount lower than 0.1%"
);
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set maxWallet lower than 0.5%"
);
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx)
public
onlyOwner
{
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
}
function updateBuyFees(
uint256 _ecosystemFee,
uint256 _liquidityFee,
uint256 _charityFee
) external onlyOwner {
buyEcosystemFee = _ecosystemFee;
buyLiquidityFee = _liquidityFee;
buyCharityFee = _charityFee;
buyTotalFees = buyEcosystemFee + buyLiquidityFee + buyCharityFee;
require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(
uint256 _ecosystemFee,
uint256 _liquidityFee,
uint256 _charityFee
) external onlyOwner {
sellEcosystemFee = _ecosystemFee;
sellLiquidityFee = _liquidityFee;
sellCharityFee = _charityFee;
sellTotalFees = sellEcosystemFee + sellLiquidityFee + sellCharityFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value)
public
onlyOwner
{
require(
pair != uniswapV2Pair,
"The pair cannot be removed from automatedMarketMakerPairs"
);
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMWallet(address newEcosystemWallet)
external
onlyOwner
{
emit ecosystemWalletUpdated(newEcosystemWallet, ecosystemWallet);
ecosystemWallet = newEcosystemWallet;
}
function updateCharityWallet(address newWallet) external onlyOwner {
emit charityWalletUpdated(newWallet, charityWallet);
charityWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
//when buy
if (
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
//when sell
else if (
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
} else if (!_isExcludedMaxTransactionAmount[to]) {
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
// on buy
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
deadAddress,
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForEcosystem +
tokensForCharity;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForEcosystem = ethBalance.mul(tokensForEcosystem).div(
totalTokensToSwap
);
uint256 ethForCharity = ethBalance.mul(tokensForCharity).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForEcosystem - ethForCharity;
tokensForLiquidity = 0;
tokensForEcosystem = 0;
tokensForCharity = 0;
(success, ) = address(charityWallet).call{value: ethForCharity}("");
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(ecosystemWallet).call{
value: address(this).balance
}("");
}
function setAutoLPBurnSettings(
uint256 _frequencyInSeconds,
uint256 _percent,
bool _Enabled
) external onlyOwner {
require(
_frequencyInSeconds >= 600,
"cannot set buyback more often than every 10 minutes"
);
require(
_percent <= 1000 && _percent >= 0,
"Must set auto LP burn percent between 0% and 10%"
);
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool) {
lastLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent)
external
onlyOwner
returns (bool)
{
require(
block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
"Must wait for cooldown to finish"
);
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
}
|
Anti-bot and anti-whale mappings and variables exlcude from fees and max transaction amount store addresses that a automatic market maker pairs. Any transfer *to* these addresses could be subject to a maximum transfer amount
|
contract CHAMPS is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public ecosystemWallet;
address public charityWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
bool public lpBurnEnabled = true;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyEcosystemFee;
uint256 public buyLiquidityFee;
uint256 public buyCharityFee;
uint256 public sellTotalFees;
uint256 public sellEcosystemFee;
uint256 public sellLiquidityFee;
uint256 public sellCharityFee;
uint256 public tokensForEcosystem;
uint256 public tokensForLiquidity;
uint256 public tokensForCharity;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
mapping(address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(
address indexed newAddress,
address indexed oldAddress
);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event ecosystemWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event charityWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("All Stars Token", "CHAMPS") {
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 _buyEcosystemFee = 7;
uint256 _buyLiquidityFee = 2;
uint256 _buyCharityFee = 1;
uint256 _sellEcosystemFee = 15;
uint256 _sellLiquidityFee = 4;
uint256 _sellCharityFee = 1;
uint256 totalSupply = 1_000_000_000 * 1e18;
buyEcosystemFee = _buyEcosystemFee;
buyLiquidityFee = _buyLiquidityFee;
buyCharityFee = _buyCharityFee;
buyTotalFees = buyEcosystemFee + buyLiquidityFee + buyCharityFee;
sellEcosystemFee = _sellEcosystemFee;
sellLiquidityFee = _sellLiquidityFee;
sellCharityFee = _sellCharityFee;
sellTotalFees = sellEcosystemFee + sellLiquidityFee + sellCharityFee;
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);
}
receive() external payable {}
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
}
function removeLimits() external onlyOwner returns (bool) {
limitsInEffect = false;
return true;
}
function disableTransferDelay() external onlyOwner returns (bool) {
transferDelayEnabled = false;
return true;
}
function updateSwapTokensAtAmount(uint256 newAmount)
external
onlyOwner
returns (bool)
{
require(
newAmount >= (totalSupply() * 1) / 100000,
"Swap amount cannot be lower than 0.001% total supply."
);
require(
newAmount <= (totalSupply() * 5) / 1000,
"Swap amount cannot be higher than 0.5% total supply."
);
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000) / 1e18,
"Cannot set maxTransactionAmount lower than 0.1%"
);
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set maxWallet lower than 0.5%"
);
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx)
public
onlyOwner
{
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function updateSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
}
function updateBuyFees(
uint256 _ecosystemFee,
uint256 _liquidityFee,
uint256 _charityFee
) external onlyOwner {
buyEcosystemFee = _ecosystemFee;
buyLiquidityFee = _liquidityFee;
buyCharityFee = _charityFee;
buyTotalFees = buyEcosystemFee + buyLiquidityFee + buyCharityFee;
require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(
uint256 _ecosystemFee,
uint256 _liquidityFee,
uint256 _charityFee
) external onlyOwner {
sellEcosystemFee = _ecosystemFee;
sellLiquidityFee = _liquidityFee;
sellCharityFee = _charityFee;
sellTotalFees = sellEcosystemFee + sellLiquidityFee + sellCharityFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value)
public
onlyOwner
{
require(
pair != uniswapV2Pair,
"The pair cannot be removed from automatedMarketMakerPairs"
);
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMWallet(address newEcosystemWallet)
external
onlyOwner
{
emit ecosystemWalletUpdated(newEcosystemWallet, ecosystemWallet);
ecosystemWallet = newEcosystemWallet;
}
function updateCharityWallet(address newWallet) external onlyOwner {
emit charityWalletUpdated(newWallet, charityWallet);
charityWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
if (
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
else if (
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
} else if (!_isExcludedMaxTransactionAmount[to]) {
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForCharity += (fees * sellCharityFee) / sellTotalFees;
tokensForEcosystem += (fees * sellEcosystemFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForCharity += (fees * buyCharityFee) / buyTotalFees;
tokensForEcosystem += (fees * buyEcosystemFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
address(this),
tokenAmount,
deadAddress,
block.timestamp
);
}
uniswapV2Router.addLiquidityETH{value: ethAmount}(
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForEcosystem +
tokensForCharity;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForEcosystem = ethBalance.mul(tokensForEcosystem).div(
totalTokensToSwap
);
uint256 ethForCharity = ethBalance.mul(tokensForCharity).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForEcosystem - ethForCharity;
tokensForLiquidity = 0;
tokensForEcosystem = 0;
tokensForCharity = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(ecosystemWallet).call{
value: address(this).balance
}("");
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForEcosystem +
tokensForCharity;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForEcosystem = ethBalance.mul(tokensForEcosystem).div(
totalTokensToSwap
);
uint256 ethForCharity = ethBalance.mul(tokensForCharity).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForEcosystem - ethForCharity;
tokensForLiquidity = 0;
tokensForEcosystem = 0;
tokensForCharity = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(ecosystemWallet).call{
value: address(this).balance
}("");
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForEcosystem +
tokensForCharity;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForEcosystem = ethBalance.mul(tokensForEcosystem).div(
totalTokensToSwap
);
uint256 ethForCharity = ethBalance.mul(tokensForCharity).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForEcosystem - ethForCharity;
tokensForLiquidity = 0;
tokensForEcosystem = 0;
tokensForCharity = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(ecosystemWallet).call{
value: address(this).balance
}("");
}
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
(success, ) = address(charityWallet).call{value: ethForCharity}("");
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForEcosystem +
tokensForCharity;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForEcosystem = ethBalance.mul(tokensForEcosystem).div(
totalTokensToSwap
);
uint256 ethForCharity = ethBalance.mul(tokensForCharity).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForEcosystem - ethForCharity;
tokensForLiquidity = 0;
tokensForEcosystem = 0;
tokensForCharity = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(ecosystemWallet).call{
value: address(this).balance
}("");
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForEcosystem +
tokensForCharity;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForEcosystem = ethBalance.mul(tokensForEcosystem).div(
totalTokensToSwap
);
uint256 ethForCharity = ethBalance.mul(tokensForCharity).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForEcosystem - ethForCharity;
tokensForLiquidity = 0;
tokensForEcosystem = 0;
tokensForCharity = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(ecosystemWallet).call{
value: address(this).balance
}("");
}
function setAutoLPBurnSettings(
uint256 _frequencyInSeconds,
uint256 _percent,
bool _Enabled
) external onlyOwner {
require(
_frequencyInSeconds >= 600,
"cannot set buyback more often than every 10 minutes"
);
require(
_percent <= 1000 && _percent >= 0,
"Must set auto LP burn percent between 0% and 10%"
);
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool) {
lastLpBurnTime = block.timestamp;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
pair.sync();
emit AutoNukeLP();
return true;
}
function autoBurnLiquidityPairTokens() internal returns (bool) {
lastLpBurnTime = block.timestamp;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
pair.sync();
emit AutoNukeLP();
return true;
}
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
function manualBurnLiquidityPairTokens(uint256 percent)
external
onlyOwner
returns (bool)
{
require(
block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
"Must wait for cooldown to finish"
);
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
pair.sync();
emit ManualNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent)
external
onlyOwner
returns (bool)
{
require(
block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
"Must wait for cooldown to finish"
);
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
pair.sync();
emit ManualNukeLP();
return true;
}
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
}
| 1,336,178
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// 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);
}
// File @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File @openzeppelin/contracts/utils/Context.sol@v4.2.0
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/token/ERC20/ERC20.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, 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 {}
}
// File @openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
unchecked {
_approve(account, _msgSender(), currentAllowance - amount);
}
_burn(account, amount);
}
}
// File @openzeppelin/contracts/security/Pausable.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File @openzeppelin/contracts/token/ERC20/extensions/ERC20Pausable.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev ERC20 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC20Pausable is ERC20, Pausable {
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
require(!paused(), "ERC20Pausable: token transfer while paused");
}
}
// File @openzeppelin/contracts/utils/Strings.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File @openzeppelin/contracts/utils/introspection/IERC165.sol@v4.2.0
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@v4.2.0
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/access/AccessControl.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File @openzeppelin/contracts/utils/structs/EnumerableSet.sol@v4.2.0
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];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// File @openzeppelin/contracts/access/AccessControlEnumerable.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerable {
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
function getRoleMemberCount(bytes32 role) external view returns (uint256);
}
/**
* @dev Extension of {AccessControl} that allows enumerating the members of each role.
*/
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
using EnumerableSet for EnumerableSet.AddressSet;
mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view override returns (address) {
return _roleMembers[role].at(index);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view override returns (uint256) {
return _roleMembers[role].length();
}
/**
* @dev Overload {grantRole} to track enumerable memberships
*/
function grantRole(bytes32 role, address account) public virtual override {
super.grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {revokeRole} to track enumerable memberships
*/
function revokeRole(bytes32 role, address account) public virtual override {
super.revokeRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {renounceRole} to track enumerable memberships
*/
function renounceRole(bytes32 role, address account) public virtual override {
super.renounceRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {_setupRole} to track enumerable memberships
*/
function _setupRole(bytes32 role, address account) internal virtual override {
super._setupRole(role, account);
_roleMembers[role].add(account);
}
}
// File @openzeppelin/contracts/token/ERC20/presets/ERC20PresetMinterPauser.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev {ERC20} token, including:
*
* - ability for holders to burn (destroy) their tokens
* - a minter role that allows for token minting (creation)
* - a pauser role that allows to stop all token transfers
*
* This contract uses {AccessControl} to lock permissioned functions using the
* different roles - head to its documentation for details.
*
* The account that deploys the contract will be granted the minter and pauser
* roles, as well as the default admin role, which will let it grant both minter
* and pauser roles to other accounts.
*/
contract ERC20PresetMinterPauser is Context, AccessControlEnumerable, ERC20Burnable, ERC20Pausable {
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
/**
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the
* account that deploys the contract.
*
* See {ERC20-constructor}.
*/
constructor(string memory name, string memory symbol) ERC20(name, symbol) {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(PAUSER_ROLE, _msgSender());
}
/**
* @dev Creates `amount` new tokens for `to`.
*
* See {ERC20-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(address to, uint256 amount) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint");
_mint(to, amount);
}
/**
* @dev Pauses all token transfers.
*
* See {ERC20Pausable} and {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function pause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to pause");
_pause();
}
/**
* @dev Unpauses all token transfers.
*
* See {ERC20Pausable} and {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function unpause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to unpause");
_unpause();
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override(ERC20, ERC20Pausable) {
super._beforeTokenTransfer(from, to, amount);
}
}
// File @openzeppelin/contracts/access/Ownable.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File @openzeppelin/contracts/security/ReentrancyGuard.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File @openzeppelin/contracts/utils/math/SafeMath.sol@v4.2.0
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// File contracts/LPStaking.sol
// LP Pool - Chonker.Finance
pragma solidity ^0.8.4;
contract LPStaking is ReentrancyGuard, Pausable, Ownable {
using SafeMath for uint256;
uint256 constant public PERCENTS_DIVIDER = 1000;
struct PoolInfo {
/* LP Token */
address LPAddress;
/* Reward Token */
address rewardTokenAddress;
/* Staking Reward ratio ( every 1 week ) */
uint256 rewardPerWeek;
uint256 minStakingAmount;
uint256 maxStakingAmount;
/* Penelty Fee for unstaking (%) */
uint unstakingFee;
/* How many tokens we have successfully staked */
uint256 totalStaked;
}
struct UserInfo {
uint256 balance;
uint256 rewards;
uint256 lastUpdated;
}
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
mapping(address => bool) public poolExistence;
/* Address for collecting fee */
address public feeAddress;
event RewardAddressUpdated(uint256 pid, address token);
event RewardPerWeekUpdated(uint256 pid, uint256 reward);
event Staked(uint256 pid, address indexed account, uint256 amount);
event Withdrawn(uint256 pid, address indexed account, uint256 amount);
event Redeem(uint256 pid, address indexed account, uint256 amount);
modifier updateReward(uint256 pid, address account) {
if (account != address(0)) {
UserInfo storage uInfo = userInfo[pid][account];
uInfo.rewards = earned(pid, account);
uInfo.lastUpdated = block.timestamp;
}
_;
}
modifier nonDuplicated(address _lpToken) {
require(poolExistence[_lpToken] == false, "nonDuplicated: duplicated");
_;
}
constructor(address _feeAddress) {
feeAddress = _feeAddress;
}
function addPool(address _lpAddress,
address _reward,
uint256 _rewardPerWeek,
uint256 _unstakingFee,
uint256 _minStaking,
uint256 _maxStaking
) public onlyOwner nonDuplicated(_lpAddress) {
poolExistence[_lpAddress] = true;
poolInfo.push(PoolInfo({
LPAddress: _lpAddress,
rewardTokenAddress: _reward,
rewardPerWeek: _rewardPerWeek,
minStakingAmount: _minStaking,
maxStakingAmount: _maxStaking,
unstakingFee: _unstakingFee,
totalStaked: 0
}));
}
function setRewardTokenAddress(uint256 _pid, address _address) external onlyOwner {
require(_address != address(0x0), "invalid address");
poolInfo[_pid].rewardTokenAddress = _address;
emit RewardAddressUpdated(_pid, _address);
}
function setRewardPerWeek(uint256 _pid, uint256 _reward) external onlyOwner {
poolInfo[_pid].rewardPerWeek = _reward;
emit RewardPerWeekUpdated(_pid, _reward);
}
function setUnstakingFee(uint256 _pid, uint256 _fee) external onlyOwner {
require(_fee < PERCENTS_DIVIDER, "Unstaking fee is too big");
poolInfo[_pid].unstakingFee = _fee;
}
function setFeeAddress(address _addr) external onlyOwner {
feeAddress = _addr;
}
function setMinMaxAmount(uint256 _pid, uint256 _min, uint256 _max) external onlyOwner {
require(_max > 0 && _max >= _min, "Invalid Max amount");
poolInfo[_pid].minStakingAmount = _min;
poolInfo[_pid].maxStakingAmount = _max;
}
function balanceOf(uint256 _pid, address account) public view returns (uint256) {
return userInfo[_pid][account].balance;
}
function earned(uint256 _pid, address account) public view returns (uint256) {
uint256 blockTime = block.timestamp;
UserInfo memory uInfo = userInfo[_pid][account];
PoolInfo memory pInfo = poolInfo[_pid];
uint256 amount = blockTime.sub(uInfo.lastUpdated).mul(balanceOf(_pid, account)).mul(pInfo.rewardPerWeek).div(604800).div(PERCENTS_DIVIDER);
return uInfo.rewards.add(amount);
}
function stake(uint256 _pid, uint256 amount) public updateReward(_pid, _msgSender()) nonReentrant whenNotPaused {
UserInfo storage uInfo = userInfo[_pid][_msgSender()];
PoolInfo storage pInfo = poolInfo[_pid];
require(amount.add(uInfo.balance) >= pInfo.minStakingAmount , "Cannot stake less than Min Limitation");
require(amount.add(uInfo.balance) <= pInfo.maxStakingAmount, "Cannot stake more than Max Limitation");
require(IERC20(pInfo.LPAddress).transferFrom(_msgSender(), address(this), amount), "LP token was not successfully transferred to contract");
uInfo.balance = uInfo.balance.add(amount);
pInfo.totalStaked = pInfo.totalStaked.add(amount);
emit Staked(_pid, _msgSender(), amount);
}
function withdraw(uint256 _pid, uint256 amount) public updateReward(_pid, _msgSender()) nonReentrant {
require(amount > 0, "Cannot withdraw 0");
require(amount <= balanceOf(_pid, _msgSender()), "Cannot withdraw more than balance");
UserInfo storage uInfo = userInfo[_pid][_msgSender()];
PoolInfo storage pInfo = poolInfo[_pid];
uint256 fee = amount.mul(pInfo.unstakingFee).div(PERCENTS_DIVIDER);
if(fee > 0) {
require(IERC20(pInfo.LPAddress).transfer(feeAddress, fee), "Transfer unstaking fee failed");
}
require(IERC20(pInfo.LPAddress).transfer(_msgSender(), amount.sub(fee)), "Transfer failed");
uInfo.balance = uInfo.balance.sub(amount);
pInfo.totalStaked = pInfo.totalStaked.sub(amount);
emit Withdrawn(_pid, _msgSender(), amount);
}
function exit(uint256 _pid) external {
UserInfo memory uInfo = userInfo[_pid][_msgSender()];
withdraw(_pid, uInfo.balance);
redeem(_pid, uInfo.rewards);
}
function redeem(uint256 _pid, uint256 amount) public updateReward(_pid, _msgSender()) nonReentrant {
require(amount > 0, "Cannot redeem 0");
UserInfo storage uInfo = userInfo[_pid][_msgSender()];
PoolInfo storage pInfo = poolInfo[_pid];
require(amount <= uInfo.rewards, "Not enough rewards to redeem");
ERC20PresetMinterPauser(pInfo.rewardTokenAddress).mint(_msgSender(), amount);
uInfo.rewards = uInfo.rewards.sub(amount);
emit Redeem(_pid, _msgSender(), amount);
}
}
|
* @dev ERC20 token with pausable token transfers, minting and burning. Useful for scenarios such as preventing trades until the end of an evaluation period, or having an emergency switch for freezing all token transfers in the event of a large bug./
|
abstract contract ERC20Pausable is ERC20, Pausable {
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
require(!paused(), "ERC20Pausable: token transfer while paused");
}
}
| 250,772
|
[
1,
4625,
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./full_match/10/0x51058D7bdA2661E134cC40137fC04Cf3a9087e53/sources/contracts/core/connext/facets/StableSwapFacet.sol
|
* @notice Calculate the amount of underlying token available to withdraw when withdrawing via only single token @param key Hash of the canonical id + domain @param tokenAmount the amount of LP token to burn @param tokenIndex index of which token will be withdrawn @return availableTokenAmount calculated amount of underlying token available to withdraw/
|
function calculateRemoveSwapLiquidityOneToken(
bytes32 key,
uint256 tokenAmount,
uint8 tokenIndex
) external view returns (uint256 availableTokenAmount) {
return s.swapStorages[key].calculateWithdrawOneToken(tokenAmount, tokenIndex);
}
| 3,781,474
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pragma solidity 0.6.2;
//based on smartcheck
contract Crowdsale {
uint256 private rate;
uint256 private cap;
address public owner1;
address public owner2;
//There is little chance that both addresses will fail
constructor(address _user1, address _user2) public {
owner1 = _user1;
owner2 = _user2;
rate = 0;
cap = 0;
}
function setRate(uint256 _rate) public {
require(owner1 == msg.sender || owner2 == msg.sender);
rate = _rate;
}
function setCap(uint256 _cap) public {
require (msg.sender == owner1 || msg.sender == owner2);
cap = _cap;
}
}
|
There is little chance that both addresses will fail
|
contract Crowdsale {
uint256 private rate;
uint256 private cap;
address public owner1;
address public owner2;
constructor(address _user1, address _user2) public {
owner1 = _user1;
owner2 = _user2;
rate = 0;
cap = 0;
}
function setRate(uint256 _rate) public {
require(owner1 == msg.sender || owner2 == msg.sender);
rate = _rate;
}
function setCap(uint256 _cap) public {
require (msg.sender == owner1 || msg.sender == owner2);
cap = _cap;
}
}
| 6,470,615
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pragma solidity ^0.4.24;
/**
New808token ERC20 contract
Symbol : T808
Name : New808token
Decimals : 0
Owner Account : 0x9BDD969B35b0BA80014A9Ba771a3842883Eac1bA
(c) by Didar Metu 2021. MIT Licence.
*/
/** Lib: Safe Math */
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.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 Approval(address indexed tokenOwner, address indexed spender, uint tokens);
event Transfer(address indexed from, address indexed to, uint tokens);
event Mint(address indexed to, uint tokens);
event Burn(address indexed from, uint tokens);
}
/**
Contract function to receive approval and execute function in one call
*/
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
/**
ERC20 Token, with the addition of symbol, name and decimals and assisted token transfers
*/
contract New808token is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
address public contract_owner;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/** Constructor */
constructor() public {
symbol = "T808";
name = "New808token";
decimals = 0;
_totalSupply = 1000000; //1 million
contract_owner = 0x9BDD969B35b0BA80014A9Ba771a3842883Eac1bA; // didarmetu
balances[0x6c431c70ce1a5e06e171478824721c35925c6ab1] = 200000; // Lifenaked
balances[0xFd3066a5299299514E5C796D3B3fae8C744320F5] = 200000; //cunningstunt
balances[contract_owner] = 600000;
emit Transfer(address(0), contract_owner, 600000);
emit Transfer(address(0), 0x6c431c70ce1a5e06e171478824721c35925c6ab1, 200000);
emit Transfer(address(0), 0xFd3066a5299299514E5C796D3B3fae8C744320F5, 200000);
}
/** 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
*/
function transfer(address to, uint tokens) public returns (bool success) {
require(tokens <= balances[msg.sender]);
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
*/
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
*/
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;
}
/**
Mintable ERC20
Simple ERC20 Token example, with mintable token creation
Based on code by TokenMarketNet: https://github.com/TokenMarketNet/smart-contracts/blob/master/contracts/MintableToken.sol
*/
function CreateT808(address to, uint tokens) public returns (bool success) {
require(msg.sender == contract_owner);
_totalSupply = safeAdd(_totalSupply,tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(address(0), to, tokens);
emit Mint(to, tokens);
return true;
}
/** Burn Tokens */
function BurnT808(uint tokens) public returns (bool success) {
require(tokens <= balances[msg.sender]); // Check if the sender has enough
balances[msg.sender] = safeSub(balances[msg.sender],tokens); // Subtract from the sender
_totalSupply = safeSub(_totalSupply, tokens); // Updates totalSupply
emit Transfer(msg.sender, address(0), tokens);
emit Burn(msg.sender, tokens);
return true;
}
/** Don't accept ETH */
function () public payable {
revert();
}
}
|
Updates totalSupply
|
_totalSupply = safeSub(_totalSupply, tokens);
| 5,994,288
|
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// SPDX-License-Identifier: MIT
pragma solidity >=0.7.0 <0.9.0;
import "./reward.sol";
import "./tether.sol";
contract DecentralBank {
string public name = "Decentral Bank";
address public owner;
Tether public tether;
Reward public reward;
address[] public stakers;
mapping(address => uint256) public stakingBalance;
mapping(address => bool) public hasStaked;
mapping(address => bool) public isStaking;
constructor(Reward _reward, Tether _tether) {
reward = _reward;
tether = _tether;
owner = msg.sender;
}
function depositTokens(uint256 _amount) public {
tether.transferFrom(msg.sender, address(this), _amount);
stakingBalance[msg.sender] += _amount;
if (!hasStaked[msg.sender]) {
stakers.push(msg.sender);
hasStaked[msg.sender] = true;
}
isStaking[msg.sender] = true;
}
function issueTokens() public {
require(msg.sender == owner, "Caller must be the owner");
for(uint i=0; i<stakers.length; i++) {
address recipient = stakers[i];
uint balance = stakingBalance[recipient];
if(balance > 0) {
reward.transfer(recipient, balance/10); // 10% reward tokens from the total amount of staking will be issued
}
}
}
function unstakeTokens() public {
uint balance = stakingBalance[msg.sender];
require(balance > 0, "staking balance should be more than zero");
tether.transfer(msg.sender, balance);
stakingBalance[msg.sender] = 0;
isStaking[msg.sender] = false;
}
}
|
10% reward tokens from the total amount of staking will be issued
|
reward.transfer(recipient, balance/10);
| 12,757,735
|
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./full_match/80001/0x144e1C4a983f352f691a14A590B4a01faF8CCf09/sources/contracts/ERC20EscrowToPay.sol
|
* @notice Refunds to payer after twelve months and delete the escrow. @param _paymentRef Reference of the Invoice related. @dev requires that the request .isFrozen = true and .unlockDate to be lower or equal to block.timestamp./
|
function refundFrozenFunds(bytes memory _paymentRef)
external
IsInEscrow(_paymentRef)
IsNotInEmergencyState(_paymentRef)
{
require(requestMapping[_paymentRef].isFrozen, "Not frozen!");
require(requestMapping[_paymentRef].unlockDate <= block.timestamp, "Not Yet!");
requestMapping[_paymentRef].isFrozen = false;
require(_withdraw(_paymentRef, requestMapping[_paymentRef].payer), "Withdraw Failed!");
}
| 5,670,107
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pragma solidity ^0.5.0;
import "openzeppelin-solidity/contracts/math/SafeMath.sol";
import "openzeppelin-solidity/contracts/drafts/Counter.sol";
contract BountyApp {
using SafeMath for uint256;
using Counter for Counter.Counter;
address public owner;
bool public stopped = false;
/**
* @dev Bounty struct
* Holds all the infos about a job offer
*/
struct Bounty {
// If the offer is still opened
bool isOpened;
// If the offer exist
bool exist;
// The amount that will be payed for this offer
uint256 amount;
// Title of the offer
string title;
// The description of the offer
string description;
}
// Id of the bounties that increment by one for each new bounty
Counter.Counter private bountyId;
// Mapping between the bounty id and the bounty struct
mapping(uint256 => Bounty) public idToBounty;
// Mapping between a bountyId and its creator
mapping(uint256 => address) public bountyIdToCreator;
// Mapping from creator to number of bounty created
mapping(address => uint256) public createdBountyCount;
// Mapping between a creator and the list of bountyId he created
mapping(address => uint256[]) public creatorToBountyIds;
/**
* @dev Work struct
* It holds all the infos about a work that is submitted to
* fullfill a bounty
*/
struct Work {
string workFileHash;
string description;
// if the bounty creator refused it
bool denied;
bool exist;
// If the bounty creator approved this work
bool approved;
address doer;
}
// Id of the works that increment by one for each new work
Counter.Counter private workId;
// Mapping between a work id and the work struct
mapping(uint256 => Work) public idToWork;
// mapping between a bounty id and the ids of the works that have been submitted
mapping(uint256 => uint256[]) public bountyIdToWorkIds;
// Mapping between work and its doer
mapping(uint256 => address) public workIdToDoer;
// Mapping between a work and the bounty it aims
mapping(uint256 => uint256) public workIdToBountyId;
// Map between an address and the count of works proposed by this address
mapping(address => uint256) public worksProposedCount;
// Mapping between an address and the work ids that it has proposed
mapping(address => uint256[]) public doerToWorkIds;
// withdrawal pending for job posters
mapping(address => uint256) public pendingWithdrawals;
/// EVENTS
event NewBounty(uint256 bountyId, address indexed creator);
event NewWork(uint256 workId, uint256 indexed bountyId, address indexed hunter);
event WorkApproved(uint256 workId, uint256 indexed bountyId);
event WorkRejected(uint256 workId, uint256 indexed bountyId);
event BalanceWithdrawed(address indexed withdrawer);
/**
* @dev Constructor that set the owner of the contract
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Modifier that avoid a function to run when we are
* in an emergency situation (Circuit Breaker design pattern)
*/
modifier stopInEmergency { require(!stopped); _; }
/**
* @dev Modifier that make sure this function can run only when
* the smart contract is in emergency mode (Circuit Breaker design pattern)
*/
modifier onlyInEmergency { require(stopped); _; }
/**
* @dev Modifier that checks if the function caller is also the smart contract owner
*/
modifier onlyOwner { require(msg.sender == owner); _; }
/**
* @dev Modifier that check if a bounty exists
* @param id uint256 Bounty id
*/
modifier bountyExist(uint256 id) {
require(idToBounty[id].exist != false, "This bounty does not exist");
_;
}
/**
* @dev Modifier that check if a work exists
* @param id uint256 Work id
*/
modifier workExist(uint256 id) {
require(idToWork[id].exist != false, "This work does not exist");
_;
}
/**
* @dev Modifier that checks that an bounty is still open
* @param id uint256 Bounty id
*/
modifier bountyOpen(uint256 id) {
require(idToBounty[id].isOpened == true, "Bounty not opened for work");
_;
}
/**
* @dev Activate the emergency mode (Circuit Breaker design patter)
* Only the owner of the smart contract can do it
*/
function activateCircuitBreaker() onlyOwner public {
stopped = true;
}
/**
* @dev Returns the number of work that has been submitted for this bounty
* @param id uint256 Id of the job
* @return uint256
*/
function bountyCountWorks(uint256 id) public view bountyExist(id) returns (uint256) {
return bountyIdToWorkIds[id].length;
}
/**
* @dev Returns true if the bounty has not been filled yet
* @param _bountyId uint256 Id of the bounty
* @return bool
*/
function isBountyOpened(uint256 _bountyId) public view bountyExist(_bountyId) returns (bool) {
return idToBounty[_bountyId].isOpened;
}
/**
* @dev Create a new bounty as a creator the caller
* The user must provide at least the amount that he is willing to pay for this bounty
* @param amount uint256 Amount to be paid when the bounty is done
* @param title string Title of the bounty to create
* @param description string Description of the bounty
* @return bountyId uint256
*/
function createBounty(uint256 amount, string memory title, string memory description) stopInEmergency public payable returns (uint256) {
// Check that the user pays at leat the amount he is willing to pay for the bounty
require(msg.value >= amount, "Ether sent must be at least equal to the amount you're willing to pay for the bounty");
// Create a new bounty
Bounty memory newBounty = Bounty(true, true, amount, title, description);
// Increment the bountyId
uint256 newBountyId = bountyId.next();
// Associate the bounty id to the creator address
bountyIdToCreator[newBountyId] = msg.sender;
// Increment the number of bounty created by this user
createdBountyCount[msg.sender]++;
// Add the bounty id to the list of bounty ids this user has created
creatorToBountyIds[msg.sender].push(newBountyId);
// Add the bounty struct to the mapping of bountyId to job
idToBounty[newBountyId] = newBounty;
// Add to the user balance the extra he would have paid
// Here we implement the withdraw design pattern to avoid someone to block the contract
if(msg.value > amount) {
uint256 change = msg.value.sub(amount);
pendingWithdrawals[msg.sender] += change;
}
// Emit NewBounty event
emit NewBounty(newBountyId, msg.sender);
// Return the bounty id of the bounty we just created
return newBountyId;
}
/**
* @dev Get all the infos abount a bounty
* @param bountyId uint256 id of the bounty
* @return title string Title of the bounty
* @return description string Description of the bounty
* @return amount uint256 The amount that will be paid for this bounty
* @return id uint256 Bounty id
* @return creator Address of the bounty creator
* @return isOpened bool If the bounty is still opened for work submission
*/
function getBountyInfos(uint256 bountyId) public view bountyExist(bountyId) returns (
string memory title,
string memory description,
uint256 amount,
uint256 id,
address creator,
bool isOpened
)
{
Bounty memory bounty = idToBounty[bountyId];
return (bounty.title, bounty.description, bounty.amount, bountyId, bountyIdToCreator[bountyId], bounty.isOpened);
}
/**
* @dev Returns the last bounty id that was created
* @return bountyId uint256 The last bounty id
*/
function getLastBountyId() public view returns (uint256) {
return bountyId.current;
}
/**
* @dev Submit the work that has been done for approval
* @param description string Description of the work
* @param id uint256 Id of the bounty the work has been done for
* @notice Use IFPS to submit the work
* @return newWorkId uint256 The id of the new work
*/
function submitWork(string memory description, uint256 id, string memory workFileHash) public stopInEmergency bountyExist(id) bountyOpen(id) returns (uint256 newWorkId){
// Create the new work
Work memory work = Work(workFileHash, description, false, true, false, msg.sender);
// Increment the workId
newWorkId = workId.next();
// Add the work to the list of work that has been submitted for this bounty
bountyIdToWorkIds[id].push(newWorkId);
// Associate the work to its doer
doerToWorkIds[msg.sender].push(newWorkId);
// Associate the work with the job id it aims to fill
workIdToBountyId[newWorkId] = id;
// Map the work id to the work struct
idToWork[newWorkId] = work;
// Increment the number of works submitted
worksProposedCount[msg.sender]++;
// Emit NewWork event
emit NewWork(newWorkId, id, msg.sender);
}
/**
* @dev Bounty owner call it to approve a work submitted for this work
* @param _bountyId uint256 Id of the bounty the work is linked to
* @param _workId uint256 Id of the work that will be approved
*/
function approveWork(uint256 _bountyId, uint256 _workId) public stopInEmergency bountyExist(_bountyId) workExist(_workId) bountyOpen(_bountyId){
// Check the message sender is also the creator of the bounty
require(bountyIdToCreator[_bountyId] == msg.sender, "Must be the bounty creator");
// Check this work was for this bounty
require(workIdToBountyId[_workId] == _bountyId, "This work does not fill this bounty");
// Check that the work has not been rejected
require(!idToWork[_workId].denied, "This work has already been rejected");
// Set the bounty to close
idToBounty[_bountyId].isOpened = false;
// Set the work as approved
idToWork[_workId].approved = true;
address hunter = idToWork[_workId].doer;
// Add the amount of the bounty to the hunter balance (for later withdraw)
pendingWithdrawals[hunter] += idToBounty[_bountyId].amount;
// Emit event WorkApproved
emit WorkApproved(_workId, _bountyId);
}
/**
* @dev Bounty owner call it to reject a work submitted for this work
* @param _bountyId uint256 Id of the bounty the work is linked to
* @param _workId uint256 Id of the work that will be rejected
*/
function rejectWork(uint256 _bountyId, uint256 _workId) public stopInEmergency bountyExist(_bountyId) workExist(_workId) bountyOpen(_bountyId){
// Check the message sender is also the creator of the work
require(bountyIdToCreator[_bountyId] == msg.sender, "Must be the bounty creator");
// Check this work was for this bounty
require(workIdToBountyId[_workId] == _bountyId, "This work does not fill this bounty");
// Set the work as approved
idToWork[_workId].denied = true;
// Emit event WorkApproved
emit WorkRejected(_workId, _bountyId);
}
/**
* @dev Returns an array of uint256 that the ids of the work that have been submitted for this bounty
* @param _bountyId uint256
*/
function getWorkProposedIds(uint256 _bountyId) public view returns (uint256[] memory) {
return bountyIdToWorkIds[_bountyId];
}
/**
* @dev Return the infos of a work
* @param _workId uint256 Id of the work
* @return id uint256 Id of the work
* @return description string Description of the work
* @return isDenied bool If the work has been rejected or not
* @return doer address od the work doer
* @return approved book If the work has been approved
*/
function getWorkInfos(uint256 _workId) public view returns (
uint256 id,
string memory description,
string memory workFileHash,
bool isDenied,
address doer,
bool approved
)
{
Work memory work = idToWork[_workId];
return (_workId, work.description, work.workFileHash, work.denied, work.doer, work.approved);
}
/**
* @dev Allow to withdraw a pending balance of a user
*/
function withdrawPending() stopInEmergency public {
require(pendingWithdrawals[msg.sender] > 0, "You balance is nul, you can't withdraw anything");
uint256 amount = pendingWithdrawals[msg.sender];
pendingWithdrawals[msg.sender] = 0;
msg.sender.transfer(amount);
emit BalanceWithdrawed(msg.sender);
}
}
|
Mapping from creator to number of bounty created
|
mapping(address => uint256) public createdBountyCount;
| 12,945,424
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./full_match/1/0x07493F6d027De62A9A84D1F6359c85F66D55fF70/sources/Shikigami/IROIRORemix.sol
|
Setting up address of the IROIRO NFT contract instance
|
iroiroNftAddress = _iroiroNftAddress;
| 16,552,402
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pragma solidity ^0.6.6;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@chainlink/contracts/src/v0.6/ChainlinkClient.sol";
contract LinkFitToken is ERC20, Ownable, ChainlinkClient {
uint private constant TOTAL_SUPPLY = 10**27;
string private constant NAME = 'LinkFit Token';
string private constant SYMBOL = 'LFIT';
address private oracle;
bytes32 private jobId;
uint256 private fee;
string private apiUrl;
uint256 private stepRate; // step rate in wei/step
mapping (bytes32 => address) private requests;
mapping (address => uint256) private _steps;
constructor(address _oracle, string memory _jobId, uint256 _fee, address _link, string memory _apiUrl, uint256 _stepRate) public ERC20(NAME, SYMBOL) {
_mint(msg.sender, TOTAL_SUPPLY);
if (_link == address(0)) {
setPublicChainlinkToken();
} else {
setChainlinkToken(_link);
}
oracle = _oracle;
jobId = stringToBytes32(_jobId);
fee = _fee;
setApiUrl(_apiUrl);
setStepRate(_stepRate);
}
function setApiUrl(string memory _apiUrl) public onlyOwner {
apiUrl = _apiUrl;
}
// step rate in wei/step
function setStepRate(uint256 _stepRate) public onlyOwner {
stepRate = _stepRate;
}
// step rate in wei/step
function getStepRate() public view returns (uint256 rate) {
return stepRate;
}
function requestRedemption(address recipient) public onlyOwner returns (bytes32 requestId) {
Chainlink.Request memory request = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);
// Set the URL to perform the GET request on
request.add("get", buildUrl(recipient));
// value in response to use
request.add("path", "steps");
// Sends the request
bytes32 reqId = sendChainlinkRequestTo(oracle, request, fee);
// Save recipient address with this requestId
requests[reqId] = recipient;
return reqId;
}
// Receive the response in the form of uint256
function fulfill(bytes32 requestId, uint256 steps) public recordChainlinkFulfillment(requestId) {
// find recipient address for the request
address recipient = requests[requestId];
if (recipient != address(0)) {
// track steps to be redeemed
_steps[recipient] += steps;
}
// cleanup
delete requests[requestId];
}
function redeem(address recipient) public payable returns (bool result) {
if (_steps[recipient] != 0) {
transfer(recipient, _steps[recipient]*stepRate);
delete _steps[recipient];
return true;
}
return false;
}
function getSteps(address recipient) public view returns (uint256 result) {
return _steps[recipient];
}
function buildUrl(address recipient) public view returns (string memory result) {
string memory addr = string(addressToString(recipient));
return string(abi.encodePacked(apiUrl,"/steps?cryptoaddr=", addr));
}
function stringToBytes32(string memory source) public pure returns (bytes32 result) {
bytes memory tempEmptyStringTest = bytes(source);
if (tempEmptyStringTest.length == 0) {
return 0x0;
}
assembly {
result := mload(add(source, 32))
}
}
function bytes32ToString(bytes32 _bytes32) public pure returns (string memory) {
uint8 i = 0;
while(i < 32 && _bytes32[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && _bytes32[i] != 0; i++) {
bytesArray[i] = _bytes32[i];
}
return string(bytesArray);
}
function addressToString(address x) internal pure returns (string memory) {
bytes memory s = new bytes(40);
for (uint i = 0; i < 20; i++) {
bytes1 b = bytes1(uint8(uint(uint160(x)) / (2**(8*(19 - i)))));
bytes1 hi = bytes1(uint8(b) / 16);
bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
s[2*i] = ascchar(hi);
s[2*i+1] = ascchar(lo);
}
return string(s);
}
function ascchar(bytes1 b) internal pure returns (bytes1 c) {
if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);
else return bytes1(uint8(b) + 0x57);
}
}
|
step rate in wei/step
|
uint256 private stepRate;
| 910,523
|
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./full_match/5/0x8Ee90A3524229A47E4b6Cd601E6Db4FE6904F340/sources/contracts/ChaiLabsGovernance.sol
|
* @dev Check if the proposer is authorized to submit a proposal with the given description. If the proposal description ends with `#proposer=0x???`, where `0x???` is an address written as a hex string (case insensitive), then the submission of this proposal will only be authorized to said address. This is used for frontrunning protection. By adding this pattern at the end of their proposal, one can ensure that no other address can submit the same proposal. An attacker would have to either remove or change that part, which would result in a different proposal id. If the description does not match this pattern, it is unrestricted and anyone can submit it. This includes: - If the `0x???` part is not a valid hex string. - If the `0x???` part is a valid hex string, but does not contain exactly 40 hex digits. - If it ends with the expected suffix followed by newlines or other whitespace. - If it ends with some other similar suffix, e.g. `#other=abc`. - If it does not end with any such suffix./ Length is too short to contain a valid proposer suffix - Start of the string contents in memory = description + 32 - First character of the marker = len - 52 - Length of "#proposer=0x0000000000000000000000000000000000000000" = 52 - We read the memory word starting at the first character of the marker: - (description + 32) + (len - 52) = description + (len - 20) - Note: Solidity will ignore anything past the first 12 bytes If the marker is not found, there is no proposer suffix to check If any of the characters is not a hex digit, ignore the suffix entirely
|
function _isValidDescriptionForProposer(
address proposer,
string memory description
) public view virtual returns (bool) {
uint256 len = bytes(description).length;
if (len < 52) {
return true;
}
assembly {
marker := mload(add(description, sub(len, 20)))
}
if (marker != bytes12("#proposer=0x")) {
return true;
}
for (uint256 i = len - 40; i < len; ++i) {
(bool isHex, uint8 value) = _tryHexToUint(bytes(description)[i]);
if (!isHex) {
return true;
}
recovered = (recovered << 4) | value;
}
return recovered == uint160(proposer);
}
| 7,070,138
|
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./full_match/4/0x93AB4fbdE0ac5677bE146CEA96aA7b77A67Af6BF/sources/StakePool.sol
|
* @dev contract constructor @param _stakeContract the address of the staking contract/mechanism/ set owner to users[0] because unknown user will return 0 from userIndex this also allows owners to withdraw their own earnings using same functions as regular users
|
constructor(address payable _stakeContract) public {
owner = msg.sender;
require(_stakeContract != address(0));
stakeContract = _stakeContract;
sc = StakeContract(stakeContract);
users.push(owner);
}
| 12,518,139
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pragma solidity ^0.4.18;
import "./TUMOracle.sol";
contract Tipping {
// interface for the grade results
address tumOracle;
mapping(string => mapping(uint8 => TutorGroup)) tutorGroups;
constructor (address _tumOracle) public {
tumOracle = _tumOracle;
}
struct Contribution {
address addr; // address of funder/student
uint amount; // amount contributed
}
struct TutorGroup {
address tutor; // address to be paid out
uint8 gradeGoal; // grade threshold
uint amount; // total amount of funding
uint8 nContributions;
mapping(uint8 => Contribution) contributions;
bool resolved; // each tutor group can only be PAID/RESOLVED once.
}
event PayedIn(string course, uint8 group, uint newTotal);
function newTutorGroup(address _tutor, string _course, uint8 _group, uint8 _gradeGoal) public {
TutorGroup storage tg = tutorGroups[_course][_group];
// TODO check that not exist
tg.tutor = _tutor;
tg.gradeGoal = _gradeGoal;
tg.amount = 0;
tg.nContributions = 0;
tg.resolved = false;
}
function payIn(string _course, uint8 _group) public payable {
TutorGroup storage t = tutorGroups[_course][_group];
Contribution storage c = t.contributions[t.nContributions++];
c.addr = msg.sender;
c.amount = msg.value;
t.amount += c.amount;
emit PayedIn(_course, _group, t.amount);
}
function resolve(string _course, uint8 _group) public {
TutorGroup storage t = tutorGroups[_course][_group];
require (
t.resolved == false,
"Group already resolved"
);
TUMOracle oracle = TUMOracle(tumOracle);
uint8 grade = oracle.getGrade(_course, _group);
if (grade <= t.gradeGoal) {
t.tutor.transfer(t.amount); // send the money to tutor
} else {
for (uint8 i = 0; i < t.nContributions; i++) {
Contribution storage s = t.contributions[i];
s.addr.transfer(s.amount);
}
}
t.resolved = true; // paid
}
}
|
interface for the grade results
|
contract Tipping {
address tumOracle;
mapping(string => mapping(uint8 => TutorGroup)) tutorGroups;
constructor (address _tumOracle) public {
tumOracle = _tumOracle;
}
struct Contribution {
}
struct TutorGroup {
uint8 nContributions;
mapping(uint8 => Contribution) contributions;
}
event PayedIn(string course, uint8 group, uint newTotal);
function newTutorGroup(address _tutor, string _course, uint8 _group, uint8 _gradeGoal) public {
TutorGroup storage tg = tutorGroups[_course][_group];
tg.tutor = _tutor;
tg.gradeGoal = _gradeGoal;
tg.amount = 0;
tg.nContributions = 0;
tg.resolved = false;
}
function payIn(string _course, uint8 _group) public payable {
TutorGroup storage t = tutorGroups[_course][_group];
Contribution storage c = t.contributions[t.nContributions++];
c.addr = msg.sender;
c.amount = msg.value;
t.amount += c.amount;
emit PayedIn(_course, _group, t.amount);
}
function resolve(string _course, uint8 _group) public {
TutorGroup storage t = tutorGroups[_course][_group];
require (
t.resolved == false,
"Group already resolved"
);
TUMOracle oracle = TUMOracle(tumOracle);
uint8 grade = oracle.getGrade(_course, _group);
if (grade <= t.gradeGoal) {
for (uint8 i = 0; i < t.nContributions; i++) {
Contribution storage s = t.contributions[i];
s.addr.transfer(s.amount);
}
}
}
function resolve(string _course, uint8 _group) public {
TutorGroup storage t = tutorGroups[_course][_group];
require (
t.resolved == false,
"Group already resolved"
);
TUMOracle oracle = TUMOracle(tumOracle);
uint8 grade = oracle.getGrade(_course, _group);
if (grade <= t.gradeGoal) {
for (uint8 i = 0; i < t.nContributions; i++) {
Contribution storage s = t.contributions[i];
s.addr.transfer(s.amount);
}
}
}
} else {
function resolve(string _course, uint8 _group) public {
TutorGroup storage t = tutorGroups[_course][_group];
require (
t.resolved == false,
"Group already resolved"
);
TUMOracle oracle = TUMOracle(tumOracle);
uint8 grade = oracle.getGrade(_course, _group);
if (grade <= t.gradeGoal) {
for (uint8 i = 0; i < t.nContributions; i++) {
Contribution storage s = t.contributions[i];
s.addr.transfer(s.amount);
}
}
}
}
| 12,641,644
|
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pragma solidity ^0.5.0;
contract ResolverBase {
bytes4 private constant INTERFACE_META_ID = 0x01ffc9a7;
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == INTERFACE_META_ID;
}
function isAuthorised(bytes32 node) internal view returns(bool);
modifier authorised(bytes32 node) {
require(isAuthorised(node));
_;
}
function bytesToAddress(bytes memory b) internal pure returns(address payable a) {
require(b.length == 20);
assembly {
a := div(mload(add(b, 32)), exp(256, 12))
}
}
function addressToBytes(address a) internal pure returns(bytes memory b) {
b = new bytes(20);
assembly {
mstore(add(b, 32), mul(a, exp(256, 12)))
}
}
}
pragma solidity >=0.5.0;
interface ENS {
// Logged when the owner of a node assigns a new owner to a subnode.
event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);
// Logged when the owner of a node transfers ownership to a new account.
event Transfer(bytes32 indexed node, address owner);
// Logged when the resolver for a node changes.
event NewResolver(bytes32 indexed node, address resolver);
// Logged when the TTL of a node changes
event NewTTL(bytes32 indexed node, uint64 ttl);
// Logged when an operator is added or removed.
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external;
function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external;
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external returns(bytes32);
function setResolver(bytes32 node, address resolver) external;
function setOwner(bytes32 node, address owner) external;
function setTTL(bytes32 node, uint64 ttl) external;
function setApprovalForAll(address operator, bool approved) external;
function owner(bytes32 node) external view returns (address);
function resolver(bytes32 node) external view returns (address);
function ttl(bytes32 node) external view returns (uint64);
function recordExists(bytes32 node) external view returns (bool);
function isApprovedForAll(address owner, address operator) external view returns (bool);
}
/**
* The ENS registry contract.
*/
contract ENSRegistry is ENS {
struct Record {
address owner;
address resolver;
uint64 ttl;
}
mapping (bytes32 => Record) records;
mapping (address => mapping(address => bool)) operators;
// Permits modifications only by the owner of the specified node.
modifier authorised(bytes32 node) {
address owner = records[node].owner;
require(owner == msg.sender || operators[owner][msg.sender]);
_;
}
/**
* @dev Constructs a new ENS registrar.
*/
constructor() public {
records[0x0].owner = msg.sender;
}
/**
* @dev Sets the record for a node.
* @param node The node to update.
* @param owner The address of the new owner.
* @param resolver The address of the resolver.
* @param ttl The TTL in seconds.
*/
function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external {
setOwner(node, owner);
_setResolverAndTTL(node, resolver, ttl);
}
/**
* @dev Sets the record for a subnode.
* @param node The parent node.
* @param label The hash of the label specifying the subnode.
* @param owner The address of the new owner.
* @param resolver The address of the resolver.
* @param ttl The TTL in seconds.
*/
function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external {
bytes32 subnode = setSubnodeOwner(node, label, owner);
_setResolverAndTTL(subnode, resolver, ttl);
}
/**
* @dev Transfers ownership of a node to a new address. May only be called by the current owner of the node.
* @param node The node to transfer ownership of.
* @param owner The address of the new owner.
*/
function setOwner(bytes32 node, address owner) public authorised(node) {
_setOwner(node, owner);
emit Transfer(node, owner);
}
/**
* @dev Transfers ownership of a subnode keccak256(node, label) to a new address. May only be called by the owner of the parent node.
* @param node The parent node.
* @param label The hash of the label specifying the subnode.
* @param owner The address of the new owner.
*/
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) public authorised(node) returns(bytes32) {
bytes32 subnode = keccak256(abi.encodePacked(node, label));
_setOwner(subnode, owner);
emit NewOwner(node, label, owner);
return subnode;
}
/**
* @dev Sets the resolver address for the specified node.
* @param node The node to update.
* @param resolver The address of the resolver.
*/
function setResolver(bytes32 node, address resolver) public authorised(node) {
emit NewResolver(node, resolver);
records[node].resolver = resolver;
}
/**
* @dev Sets the TTL for the specified node.
* @param node The node to update.
* @param ttl The TTL in seconds.
*/
function setTTL(bytes32 node, uint64 ttl) public authorised(node) {
emit NewTTL(node, ttl);
records[node].ttl = ttl;
}
/**
* @dev Enable or disable approval for a third party ("operator") to manage
* all of `msg.sender`'s ENS records. Emits the ApprovalForAll event.
* @param operator Address to add to the set of authorized operators.
* @param approved True if the operator is approved, false to revoke approval.
*/
function setApprovalForAll(address operator, bool approved) external {
operators[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
/**
* @dev Returns the address that owns the specified node.
* @param node The specified node.
* @return address of the owner.
*/
function owner(bytes32 node) public view returns (address) {
address addr = records[node].owner;
if (addr == address(this)) {
return address(0x0);
}
return addr;
}
/**
* @dev Returns the address of the resolver for the specified node.
* @param node The specified node.
* @return address of the resolver.
*/
function resolver(bytes32 node) public view returns (address) {
return records[node].resolver;
}
/**
* @dev Returns the TTL of a node, and any records associated with it.
* @param node The specified node.
* @return ttl of the node.
*/
function ttl(bytes32 node) public view returns (uint64) {
return records[node].ttl;
}
/**
* @dev Returns whether a record has been imported to the registry.
* @param node The specified node.
* @return Bool if record exists
*/
function recordExists(bytes32 node) public view returns (bool) {
return records[node].owner != address(0x0);
}
/**
* @dev Query if an address is an authorized operator for another address.
* @param owner The address that owns the records.
* @param operator The address that acts on behalf of the owner.
* @return True if `operator` is an approved operator for `owner`, false otherwise.
*/
function isApprovedForAll(address owner, address operator) external view returns (bool) {
return operators[owner][operator];
}
function _setOwner(bytes32 node, address owner) internal {
records[node].owner = owner;
}
function _setResolverAndTTL(bytes32 node, address resolver, uint64 ttl) internal {
if(resolver != records[node].resolver) {
records[node].resolver = resolver;
emit NewResolver(node, resolver);
}
if(ttl != records[node].ttl) {
records[node].ttl = ttl;
emit NewTTL(node, ttl);
}
}
}
pragma solidity ^0.5.0;
contract ABIResolver is ResolverBase {
bytes4 constant private ABI_INTERFACE_ID = 0x2203ab56;
event ABIChanged(bytes32 indexed node, uint256 indexed contentType);
mapping(bytes32=>mapping(uint256=>bytes)) abis;
/**
* Sets the ABI associated with an ENS node.
* Nodes may have one ABI of each content type. To remove an ABI, set it to
* the empty string.
* @param node The node to update.
* @param contentType The content type of the ABI
* @param data The ABI data.
*/
function setABI(bytes32 node, uint256 contentType, bytes calldata data) external authorised(node) {
// Content types must be powers of 2
require(((contentType - 1) & contentType) == 0);
abis[node][contentType] = data;
emit ABIChanged(node, contentType);
}
/**
* Returns the ABI associated with an ENS node.
* Defined in EIP205.
* @param node The ENS node to query
* @param contentTypes A bitwise OR of the ABI formats accepted by the caller.
* @return contentType The content type of the return value
* @return data The ABI data
*/
function ABI(bytes32 node, uint256 contentTypes) external view returns (uint256, bytes memory) {
mapping(uint256=>bytes) storage abiset = abis[node];
for (uint256 contentType = 1; contentType <= contentTypes; contentType <<= 1) {
if ((contentType & contentTypes) != 0 && abiset[contentType].length > 0) {
return (contentType, abiset[contentType]);
}
}
return (0, bytes(""));
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == ABI_INTERFACE_ID || super.supportsInterface(interfaceID);
}
}
pragma solidity ^0.5.0;
contract AddrResolver is ResolverBase {
bytes4 constant private ADDR_INTERFACE_ID = 0x3b3b57de;
bytes4 constant private ADDRESS_INTERFACE_ID = 0xf1cb7e06;
uint constant private COIN_TYPE_ETH = 60;
event AddrChanged(bytes32 indexed node, address a);
event AddressChanged(bytes32 indexed node, uint coinType, bytes newAddress);
mapping(bytes32=>mapping(uint=>bytes)) _addresses;
/**
* Sets the address associated with an ENS node.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param a The address to set.
*/
function setAddr(bytes32 node, address a) external authorised(node) {
setAddr(node, COIN_TYPE_ETH, addressToBytes(a));
}
/**
* Returns the address associated with an ENS node.
* @param node The ENS node to query.
* @return The associated address.
*/
function addr(bytes32 node) public view returns (address payable) {
bytes memory a = addr(node, COIN_TYPE_ETH);
if(a.length == 0) {
return address(0);
}
return bytesToAddress(a);
}
function setAddr(bytes32 node, uint coinType, bytes memory a) public authorised(node) {
emit AddressChanged(node, coinType, a);
if(coinType == COIN_TYPE_ETH) {
emit AddrChanged(node, bytesToAddress(a));
}
_addresses[node][coinType] = a;
}
function addr(bytes32 node, uint coinType) public view returns(bytes memory) {
return _addresses[node][coinType];
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == ADDR_INTERFACE_ID || interfaceID == ADDRESS_INTERFACE_ID || super.supportsInterface(interfaceID);
}
}
pragma solidity ^0.5.0;
contract ContentHashResolver is ResolverBase {
bytes4 constant private CONTENT_HASH_INTERFACE_ID = 0xbc1c58d1;
event ContenthashChanged(bytes32 indexed node, bytes hash);
mapping(bytes32=>bytes) hashes;
/**
* Sets the contenthash associated with an ENS node.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param hash The contenthash to set
*/
function setContenthash(bytes32 node, bytes calldata hash) external authorised(node) {
hashes[node] = hash;
emit ContenthashChanged(node, hash);
}
/**
* Returns the contenthash associated with an ENS node.
* @param node The ENS node to query.
* @return The associated contenthash.
*/
function contenthash(bytes32 node) external view returns (bytes memory) {
return hashes[node];
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == CONTENT_HASH_INTERFACE_ID || super.supportsInterface(interfaceID);
}
}
pragma solidity >0.4.23;
library BytesUtils {
/*
* @dev Returns the keccak-256 hash of a byte range.
* @param self The byte string to hash.
* @param offset The position to start hashing at.
* @param len The number of bytes to hash.
* @return The hash of the byte range.
*/
function keccak(bytes memory self, uint offset, uint len) internal pure returns (bytes32 ret) {
require(offset + len <= self.length);
assembly {
ret := keccak256(add(add(self, 32), offset), len)
}
}
/*
* @dev Returns a positive number if `other` comes lexicographically after
* `self`, a negative number if it comes before, or zero if the
* contents of the two bytes are equal.
* @param self The first bytes to compare.
* @param other The second bytes to compare.
* @return The result of the comparison.
*/
function compare(bytes memory self, bytes memory other) internal pure returns (int) {
return compare(self, 0, self.length, other, 0, other.length);
}
/*
* @dev Returns a positive number if `other` comes lexicographically after
* `self`, a negative number if it comes before, or zero if the
* contents of the two bytes are equal. Comparison is done per-rune,
* on unicode codepoints.
* @param self The first bytes to compare.
* @param offset The offset of self.
* @param len The length of self.
* @param other The second bytes to compare.
* @param otheroffset The offset of the other string.
* @param otherlen The length of the other string.
* @return The result of the comparison.
*/
function compare(bytes memory self, uint offset, uint len, bytes memory other, uint otheroffset, uint otherlen) internal pure returns (int) {
uint shortest = len;
if (otherlen < len)
shortest = otherlen;
uint selfptr;
uint otherptr;
assembly {
selfptr := add(self, add(offset, 32))
otherptr := add(other, add(otheroffset, 32))
}
for (uint idx = 0; idx < shortest; idx += 32) {
uint a;
uint b;
assembly {
a := mload(selfptr)
b := mload(otherptr)
}
if (a != b) {
// Mask out irrelevant bytes and check again
uint mask;
if (shortest > 32) {
mask = uint256(- 1); // aka 0xffffff....
} else {
mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);
}
uint diff = (a & mask) - (b & mask);
if (diff != 0)
return int(diff);
}
selfptr += 32;
otherptr += 32;
}
return int(len) - int(otherlen);
}
/*
* @dev Returns true if the two byte ranges are equal.
* @param self The first byte range to compare.
* @param offset The offset into the first byte range.
* @param other The second byte range to compare.
* @param otherOffset The offset into the second byte range.
* @param len The number of bytes to compare
* @return True if the byte ranges are equal, false otherwise.
*/
function equals(bytes memory self, uint offset, bytes memory other, uint otherOffset, uint len) internal pure returns (bool) {
return keccak(self, offset, len) == keccak(other, otherOffset, len);
}
/*
* @dev Returns true if the two byte ranges are equal with offsets.
* @param self The first byte range to compare.
* @param offset The offset into the first byte range.
* @param other The second byte range to compare.
* @param otherOffset The offset into the second byte range.
* @return True if the byte ranges are equal, false otherwise.
*/
function equals(bytes memory self, uint offset, bytes memory other, uint otherOffset) internal pure returns (bool) {
return keccak(self, offset, self.length - offset) == keccak(other, otherOffset, other.length - otherOffset);
}
/*
* @dev Compares a range of 'self' to all of 'other' and returns True iff
* they are equal.
* @param self The first byte range to compare.
* @param offset The offset into the first byte range.
* @param other The second byte range to compare.
* @return True if the byte ranges are equal, false otherwise.
*/
function equals(bytes memory self, uint offset, bytes memory other) internal pure returns (bool) {
return self.length >= offset + other.length && equals(self, offset, other, 0, other.length);
}
/*
* @dev Returns true if the two byte ranges are equal.
* @param self The first byte range to compare.
* @param other The second byte range to compare.
* @return True if the byte ranges are equal, false otherwise.
*/
function equals(bytes memory self, bytes memory other) internal pure returns(bool) {
return self.length == other.length && equals(self, 0, other, 0, self.length);
}
/*
* @dev Returns the 8-bit number at the specified index of self.
* @param self The byte string.
* @param idx The index into the bytes
* @return The specified 8 bits of the string, interpreted as an integer.
*/
function readUint8(bytes memory self, uint idx) internal pure returns (uint8 ret) {
return uint8(self[idx]);
}
/*
* @dev Returns the 16-bit number at the specified index of self.
* @param self The byte string.
* @param idx The index into the bytes
* @return The specified 16 bits of the string, interpreted as an integer.
*/
function readUint16(bytes memory self, uint idx) internal pure returns (uint16 ret) {
require(idx + 2 <= self.length);
assembly {
ret := and(mload(add(add(self, 2), idx)), 0xFFFF)
}
}
/*
* @dev Returns the 32-bit number at the specified index of self.
* @param self The byte string.
* @param idx The index into the bytes
* @return The specified 32 bits of the string, interpreted as an integer.
*/
function readUint32(bytes memory self, uint idx) internal pure returns (uint32 ret) {
require(idx + 4 <= self.length);
assembly {
ret := and(mload(add(add(self, 4), idx)), 0xFFFFFFFF)
}
}
/*
* @dev Returns the 32 byte value at the specified index of self.
* @param self The byte string.
* @param idx The index into the bytes
* @return The specified 32 bytes of the string.
*/
function readBytes32(bytes memory self, uint idx) internal pure returns (bytes32 ret) {
require(idx + 32 <= self.length);
assembly {
ret := mload(add(add(self, 32), idx))
}
}
/*
* @dev Returns the 32 byte value at the specified index of self.
* @param self The byte string.
* @param idx The index into the bytes
* @return The specified 32 bytes of the string.
*/
function readBytes20(bytes memory self, uint idx) internal pure returns (bytes20 ret) {
require(idx + 20 <= self.length);
assembly {
ret := and(mload(add(add(self, 32), idx)), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000000)
}
}
/*
* @dev Returns the n byte value at the specified index of self.
* @param self The byte string.
* @param idx The index into the bytes.
* @param len The number of bytes.
* @return The specified 32 bytes of the string.
*/
function readBytesN(bytes memory self, uint idx, uint len) internal pure returns (bytes32 ret) {
require(len <= 32);
require(idx + len <= self.length);
assembly {
let mask := not(sub(exp(256, sub(32, len)), 1))
ret := and(mload(add(add(self, 32), idx)), mask)
}
}
function memcpy(uint dest, uint src, uint len) private pure {
// Copy word-length chunks while possible
for (; len >= 32; len -= 32) {
assembly {
mstore(dest, mload(src))
}
dest += 32;
src += 32;
}
// Copy remaining bytes
uint mask = 256 ** (32 - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask))
let destpart := and(mload(dest), mask)
mstore(dest, or(destpart, srcpart))
}
}
/*
* @dev Copies a substring into a new byte string.
* @param self The byte string to copy from.
* @param offset The offset to start copying at.
* @param len The number of bytes to copy.
*/
function substring(bytes memory self, uint offset, uint len) internal pure returns(bytes memory) {
require(offset + len <= self.length);
bytes memory ret = new bytes(len);
uint dest;
uint src;
assembly {
dest := add(ret, 32)
src := add(add(self, 32), offset)
}
memcpy(dest, src, len);
return ret;
}
// Maps characters from 0x30 to 0x7A to their base32 values.
// 0xFF represents invalid characters in that range.
bytes constant base32HexTable = hex'00010203040506070809FFFFFFFFFFFFFF0A0B0C0D0E0F101112131415161718191A1B1C1D1E1FFFFFFFFFFFFFFFFFFFFF0A0B0C0D0E0F101112131415161718191A1B1C1D1E1F';
/**
* @dev Decodes unpadded base32 data of up to one word in length.
* @param self The data to decode.
* @param off Offset into the string to start at.
* @param len Number of characters to decode.
* @return The decoded data, left aligned.
*/
function base32HexDecodeWord(bytes memory self, uint off, uint len) internal pure returns(bytes32) {
require(len <= 52);
uint ret = 0;
uint8 decoded;
for(uint i = 0; i < len; i++) {
bytes1 char = self[off + i];
require(char >= 0x30 && char <= 0x7A);
decoded = uint8(base32HexTable[uint(uint8(char)) - 0x30]);
require(decoded <= 0x20);
if(i == len - 1) {
break;
}
ret = (ret << 5) | decoded;
}
uint bitlen = len * 5;
if(len % 8 == 0) {
// Multiple of 8 characters, no padding
ret = (ret << 5) | decoded;
} else if(len % 8 == 2) {
// Two extra characters - 1 byte
ret = (ret << 3) | (decoded >> 2);
bitlen -= 2;
} else if(len % 8 == 4) {
// Four extra characters - 2 bytes
ret = (ret << 1) | (decoded >> 4);
bitlen -= 4;
} else if(len % 8 == 5) {
// Five extra characters - 3 bytes
ret = (ret << 4) | (decoded >> 1);
bitlen -= 1;
} else if(len % 8 == 7) {
// Seven extra characters - 4 bytes
ret = (ret << 2) | (decoded >> 3);
bitlen -= 3;
} else {
revert();
}
return bytes32(ret << (256 - bitlen));
}
}
pragma solidity >0.4.18;
/**
* @dev A library for working with mutable byte buffers in Solidity.
*
* Byte buffers are mutable and expandable, and provide a variety of primitives
* for writing to them. At any time you can fetch a bytes object containing the
* current contents of the buffer. The bytes object should not be stored between
* operations, as it may change due to resizing of the buffer.
*/
library Buffer {
/**
* @dev Represents a mutable buffer. Buffers have a current value (buf) and
* a capacity. The capacity may be longer than the current value, in
* which case it can be extended without the need to allocate more memory.
*/
struct buffer {
bytes buf;
uint capacity;
}
/**
* @dev Initializes a buffer with an initial capacity.
* @param buf The buffer to initialize.
* @param capacity The number of bytes of space to allocate the buffer.
* @return The buffer, for chaining.
*/
function init(buffer memory buf, uint capacity) internal pure returns(buffer memory) {
if (capacity % 32 != 0) {
capacity += 32 - (capacity % 32);
}
// Allocate space for the buffer data
buf.capacity = capacity;
assembly {
let ptr := mload(0x40)
mstore(buf, ptr)
mstore(ptr, 0)
mstore(0x40, add(32, add(ptr, capacity)))
}
return buf;
}
/**
* @dev Initializes a new buffer from an existing bytes object.
* Changes to the buffer may mutate the original value.
* @param b The bytes object to initialize the buffer with.
* @return A new buffer.
*/
function fromBytes(bytes memory b) internal pure returns(buffer memory) {
buffer memory buf;
buf.buf = b;
buf.capacity = b.length;
return buf;
}
function resize(buffer memory buf, uint capacity) private pure {
bytes memory oldbuf = buf.buf;
init(buf, capacity);
append(buf, oldbuf);
}
function max(uint a, uint b) private pure returns(uint) {
if (a > b) {
return a;
}
return b;
}
/**
* @dev Sets buffer length to 0.
* @param buf The buffer to truncate.
* @return The original buffer, for chaining..
*/
function truncate(buffer memory buf) internal pure returns (buffer memory) {
assembly {
let bufptr := mload(buf)
mstore(bufptr, 0)
}
return buf;
}
/**
* @dev Writes a byte string to a buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param off The start offset to write to.
* @param data The data to append.
* @param len The number of bytes to copy.
* @return The original buffer, for chaining.
*/
function write(buffer memory buf, uint off, bytes memory data, uint len) internal pure returns(buffer memory) {
require(len <= data.length);
if (off + len > buf.capacity) {
resize(buf, max(buf.capacity, len + off) * 2);
}
uint dest;
uint src;
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Length of existing buffer data
let buflen := mload(bufptr)
// Start address = buffer address + offset + sizeof(buffer length)
dest := add(add(bufptr, 32), off)
// Update buffer length if we're extending it
if gt(add(len, off), buflen) {
mstore(bufptr, add(len, off))
}
src := add(data, 32)
}
// Copy word-length chunks while possible
for (; len >= 32; len -= 32) {
assembly {
mstore(dest, mload(src))
}
dest += 32;
src += 32;
}
// Copy remaining bytes
uint mask = 256 ** (32 - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask))
let destpart := and(mload(dest), mask)
mstore(dest, or(destpart, srcpart))
}
return buf;
}
/**
* @dev Appends a byte string to a buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @param len The number of bytes to copy.
* @return The original buffer, for chaining.
*/
function append(buffer memory buf, bytes memory data, uint len) internal pure returns (buffer memory) {
return write(buf, buf.buf.length, data, len);
}
/**
* @dev Appends a byte string to a buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function append(buffer memory buf, bytes memory data) internal pure returns (buffer memory) {
return write(buf, buf.buf.length, data, data.length);
}
/**
* @dev Writes a byte to the buffer. Resizes if doing so would exceed the
* capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write the byte at.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function writeUint8(buffer memory buf, uint off, uint8 data) internal pure returns(buffer memory) {
if (off >= buf.capacity) {
resize(buf, buf.capacity * 2);
}
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Length of existing buffer data
let buflen := mload(bufptr)
// Address = buffer address + sizeof(buffer length) + off
let dest := add(add(bufptr, off), 32)
mstore8(dest, data)
// Update buffer length if we extended it
if eq(off, buflen) {
mstore(bufptr, add(buflen, 1))
}
}
return buf;
}
/**
* @dev Appends a byte to the buffer. Resizes if doing so would exceed the
* capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function appendUint8(buffer memory buf, uint8 data) internal pure returns(buffer memory) {
return writeUint8(buf, buf.buf.length, data);
}
/**
* @dev Writes up to 32 bytes to the buffer. Resizes if doing so would
* exceed the capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write at.
* @param data The data to append.
* @param len The number of bytes to write (left-aligned).
* @return The original buffer, for chaining.
*/
function write(buffer memory buf, uint off, bytes32 data, uint len) private pure returns(buffer memory) {
if (len + off > buf.capacity) {
resize(buf, (len + off) * 2);
}
uint mask = 256 ** len - 1;
// Right-align data
data = data >> (8 * (32 - len));
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Address = buffer address + sizeof(buffer length) + off + len
let dest := add(add(bufptr, off), len)
mstore(dest, or(and(mload(dest), not(mask)), data))
// Update buffer length if we extended it
if gt(add(off, len), mload(bufptr)) {
mstore(bufptr, add(off, len))
}
}
return buf;
}
/**
* @dev Writes a bytes20 to the buffer. Resizes if doing so would exceed the
* capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write at.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function writeBytes20(buffer memory buf, uint off, bytes20 data) internal pure returns (buffer memory) {
return write(buf, off, bytes32(data), 20);
}
/**
* @dev Appends a bytes20 to the buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chhaining.
*/
function appendBytes20(buffer memory buf, bytes20 data) internal pure returns (buffer memory) {
return write(buf, buf.buf.length, bytes32(data), 20);
}
/**
* @dev Appends a bytes32 to the buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function appendBytes32(buffer memory buf, bytes32 data) internal pure returns (buffer memory) {
return write(buf, buf.buf.length, data, 32);
}
/**
* @dev Writes an integer to the buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write at.
* @param data The data to append.
* @param len The number of bytes to write (right-aligned).
* @return The original buffer, for chaining.
*/
function writeInt(buffer memory buf, uint off, uint data, uint len) private pure returns(buffer memory) {
if (len + off > buf.capacity) {
resize(buf, (len + off) * 2);
}
uint mask = 256 ** len - 1;
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Address = buffer address + off + sizeof(buffer length) + len
let dest := add(add(bufptr, off), len)
mstore(dest, or(and(mload(dest), not(mask)), data))
// Update buffer length if we extended it
if gt(add(off, len), mload(bufptr)) {
mstore(bufptr, add(off, len))
}
}
return buf;
}
/**
* @dev Appends a byte to the end of the buffer. Resizes if doing so would
* exceed the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer.
*/
function appendInt(buffer memory buf, uint data, uint len) internal pure returns(buffer memory) {
return writeInt(buf, buf.buf.length, data, len);
}
}
pragma solidity >0.4.23;
/**
* @dev RRUtils is a library that provides utilities for parsing DNS resource records.
*/
library RRUtils {
using BytesUtils for *;
using Buffer for *;
/**
* @dev Returns the number of bytes in the DNS name at 'offset' in 'self'.
* @param self The byte array to read a name from.
* @param offset The offset to start reading at.
* @return The length of the DNS name at 'offset', in bytes.
*/
function nameLength(bytes memory self, uint offset) internal pure returns(uint) {
uint idx = offset;
while (true) {
assert(idx < self.length);
uint labelLen = self.readUint8(idx);
idx += labelLen + 1;
if (labelLen == 0) {
break;
}
}
return idx - offset;
}
/**
* @dev Returns a DNS format name at the specified offset of self.
* @param self The byte array to read a name from.
* @param offset The offset to start reading at.
* @return The name.
*/
function readName(bytes memory self, uint offset) internal pure returns(bytes memory ret) {
uint len = nameLength(self, offset);
return self.substring(offset, len);
}
/**
* @dev Returns the number of labels in the DNS name at 'offset' in 'self'.
* @param self The byte array to read a name from.
* @param offset The offset to start reading at.
* @return The number of labels in the DNS name at 'offset', in bytes.
*/
function labelCount(bytes memory self, uint offset) internal pure returns(uint) {
uint count = 0;
while (true) {
assert(offset < self.length);
uint labelLen = self.readUint8(offset);
offset += labelLen + 1;
if (labelLen == 0) {
break;
}
count += 1;
}
return count;
}
/**
* @dev An iterator over resource records.
*/
struct RRIterator {
bytes data;
uint offset;
uint16 dnstype;
uint16 class;
uint32 ttl;
uint rdataOffset;
uint nextOffset;
}
/**
* @dev Begins iterating over resource records.
* @param self The byte string to read from.
* @param offset The offset to start reading at.
* @return An iterator object.
*/
function iterateRRs(bytes memory self, uint offset) internal pure returns (RRIterator memory ret) {
ret.data = self;
ret.nextOffset = offset;
next(ret);
}
/**
* @dev Returns true iff there are more RRs to iterate.
* @param iter The iterator to check.
* @return True iff the iterator has finished.
*/
function done(RRIterator memory iter) internal pure returns(bool) {
return iter.offset >= iter.data.length;
}
/**
* @dev Moves the iterator to the next resource record.
* @param iter The iterator to advance.
*/
function next(RRIterator memory iter) internal pure {
iter.offset = iter.nextOffset;
if (iter.offset >= iter.data.length) {
return;
}
// Skip the name
uint off = iter.offset + nameLength(iter.data, iter.offset);
// Read type, class, and ttl
iter.dnstype = iter.data.readUint16(off);
off += 2;
iter.class = iter.data.readUint16(off);
off += 2;
iter.ttl = iter.data.readUint32(off);
off += 4;
// Read the rdata
uint rdataLength = iter.data.readUint16(off);
off += 2;
iter.rdataOffset = off;
iter.nextOffset = off + rdataLength;
}
/**
* @dev Returns the name of the current record.
* @param iter The iterator.
* @return A new bytes object containing the owner name from the RR.
*/
function name(RRIterator memory iter) internal pure returns(bytes memory) {
return iter.data.substring(iter.offset, nameLength(iter.data, iter.offset));
}
/**
* @dev Returns the rdata portion of the current record.
* @param iter The iterator.
* @return A new bytes object containing the RR's RDATA.
*/
function rdata(RRIterator memory iter) internal pure returns(bytes memory) {
return iter.data.substring(iter.rdataOffset, iter.nextOffset - iter.rdataOffset);
}
/**
* @dev Checks if a given RR type exists in a type bitmap.
* @param self The byte string to read the type bitmap from.
* @param offset The offset to start reading at.
* @param rrtype The RR type to check for.
* @return True if the type is found in the bitmap, false otherwise.
*/
function checkTypeBitmap(bytes memory self, uint offset, uint16 rrtype) internal pure returns (bool) {
uint8 typeWindow = uint8(rrtype >> 8);
uint8 windowByte = uint8((rrtype & 0xff) / 8);
uint8 windowBitmask = uint8(uint8(1) << (uint8(7) - uint8(rrtype & 0x7)));
for (uint off = offset; off < self.length;) {
uint8 window = self.readUint8(off);
uint8 len = self.readUint8(off + 1);
if (typeWindow < window) {
// We've gone past our window; it's not here.
return false;
} else if (typeWindow == window) {
// Check this type bitmap
if (len * 8 <= windowByte) {
// Our type is past the end of the bitmap
return false;
}
return (self.readUint8(off + windowByte + 2) & windowBitmask) != 0;
} else {
// Skip this type bitmap
off += len + 2;
}
}
return false;
}
function compareNames(bytes memory self, bytes memory other) internal pure returns (int) {
if (self.equals(other)) {
return 0;
}
uint off;
uint otheroff;
uint prevoff;
uint otherprevoff;
uint counts = labelCount(self, 0);
uint othercounts = labelCount(other, 0);
// Keep removing labels from the front of the name until both names are equal length
while (counts > othercounts) {
prevoff = off;
off = progress(self, off);
counts--;
}
while (othercounts > counts) {
otherprevoff = otheroff;
otheroff = progress(other, otheroff);
othercounts--;
}
// Compare the last nonequal labels to each other
while (counts > 0 && !self.equals(off, other, otheroff)) {
prevoff = off;
off = progress(self, off);
otherprevoff = otheroff;
otheroff = progress(other, otheroff);
counts -= 1;
}
if (off == 0) {
return -1;
}
if(otheroff == 0) {
return 1;
}
return self.compare(prevoff + 1, self.readUint8(prevoff), other, otherprevoff + 1, other.readUint8(otherprevoff));
}
function progress(bytes memory body, uint off) internal pure returns(uint) {
return off + 1 + body.readUint8(off);
}
}
pragma solidity ^0.5.0;
contract DNSResolver is ResolverBase {
using RRUtils for *;
using BytesUtils for bytes;
bytes4 constant private DNS_RECORD_INTERFACE_ID = 0xa8fa5682;
bytes4 constant private DNS_ZONE_INTERFACE_ID = 0x5c47637c;
// DNSRecordChanged is emitted whenever a given node/name/resource's RRSET is updated.
event DNSRecordChanged(bytes32 indexed node, bytes name, uint16 resource, bytes record);
// DNSRecordDeleted is emitted whenever a given node/name/resource's RRSET is deleted.
event DNSRecordDeleted(bytes32 indexed node, bytes name, uint16 resource);
// DNSZoneCleared is emitted whenever a given node's zone information is cleared.
event DNSZoneCleared(bytes32 indexed node);
// DNSZonehashChanged is emitted whenever a given node's zone hash is updated.
event DNSZonehashChanged(bytes32 indexed node, bytes lastzonehash, bytes zonehash);
// Zone hashes for the domains.
// A zone hash is an EIP-1577 content hash in binary format that should point to a
// resource containing a single zonefile.
// node => contenthash
mapping(bytes32=>bytes) private zonehashes;
// Version the mapping for each zone. This allows users who have lost
// track of their entries to effectively delete an entire zone by bumping
// the version number.
// node => version
mapping(bytes32=>uint256) private versions;
// The records themselves. Stored as binary RRSETs
// node => version => name => resource => data
mapping(bytes32=>mapping(uint256=>mapping(bytes32=>mapping(uint16=>bytes)))) private records;
// Count of number of entries for a given name. Required for DNS resolvers
// when resolving wildcards.
// node => version => name => number of records
mapping(bytes32=>mapping(uint256=>mapping(bytes32=>uint16))) private nameEntriesCount;
/**
* Set one or more DNS records. Records are supplied in wire-format.
* Records with the same node/name/resource must be supplied one after the
* other to ensure the data is updated correctly. For example, if the data
* was supplied:
* a.example.com IN A 1.2.3.4
* a.example.com IN A 5.6.7.8
* www.example.com IN CNAME a.example.com.
* then this would store the two A records for a.example.com correctly as a
* single RRSET, however if the data was supplied:
* a.example.com IN A 1.2.3.4
* www.example.com IN CNAME a.example.com.
* a.example.com IN A 5.6.7.8
* then this would store the first A record, the CNAME, then the second A
* record which would overwrite the first.
*
* @param node the namehash of the node for which to set the records
* @param data the DNS wire format records to set
*/
function setDNSRecords(bytes32 node, bytes calldata data) external authorised(node) {
uint16 resource = 0;
uint256 offset = 0;
bytes memory name;
bytes memory value;
bytes32 nameHash;
// Iterate over the data to add the resource records
for (RRUtils.RRIterator memory iter = data.iterateRRs(0); !iter.done(); iter.next()) {
if (resource == 0) {
resource = iter.dnstype;
name = iter.name();
nameHash = keccak256(abi.encodePacked(name));
value = bytes(iter.rdata());
} else {
bytes memory newName = iter.name();
if (resource != iter.dnstype || !name.equals(newName)) {
setDNSRRSet(node, name, resource, data, offset, iter.offset - offset, value.length == 0);
resource = iter.dnstype;
offset = iter.offset;
name = newName;
nameHash = keccak256(name);
value = bytes(iter.rdata());
}
}
}
if (name.length > 0) {
setDNSRRSet(node, name, resource, data, offset, data.length - offset, value.length == 0);
}
}
/**
* Obtain a DNS record.
* @param node the namehash of the node for which to fetch the record
* @param name the keccak-256 hash of the fully-qualified name for which to fetch the record
* @param resource the ID of the resource as per https://en.wikipedia.org/wiki/List_of_DNS_record_types
* @return the DNS record in wire format if present, otherwise empty
*/
function dnsRecord(bytes32 node, bytes32 name, uint16 resource) public view returns (bytes memory) {
return records[node][versions[node]][name][resource];
}
/**
* Check if a given node has records.
* @param node the namehash of the node for which to check the records
* @param name the namehash of the node for which to check the records
*/
function hasDNSRecords(bytes32 node, bytes32 name) public view returns (bool) {
return (nameEntriesCount[node][versions[node]][name] != 0);
}
/**
* Clear all information for a DNS zone.
* @param node the namehash of the node for which to clear the zone
*/
function clearDNSZone(bytes32 node) public authorised(node) {
versions[node]++;
emit DNSZoneCleared(node);
}
/**
* setZonehash sets the hash for the zone.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param hash The zonehash to set
*/
function setZonehash(bytes32 node, bytes calldata hash) external authorised(node) {
bytes memory oldhash = zonehashes[node];
zonehashes[node] = hash;
emit DNSZonehashChanged(node, oldhash, hash);
}
/**
* zonehash obtains the hash for the zone.
* @param node The ENS node to query.
* @return The associated contenthash.
*/
function zonehash(bytes32 node) external view returns (bytes memory) {
return zonehashes[node];
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == DNS_RECORD_INTERFACE_ID ||
interfaceID == DNS_ZONE_INTERFACE_ID ||
super.supportsInterface(interfaceID);
}
function setDNSRRSet(
bytes32 node,
bytes memory name,
uint16 resource,
bytes memory data,
uint256 offset,
uint256 size,
bool deleteRecord) private
{
uint256 version = versions[node];
bytes32 nameHash = keccak256(name);
bytes memory rrData = data.substring(offset, size);
if (deleteRecord) {
if (records[node][version][nameHash][resource].length != 0) {
nameEntriesCount[node][version][nameHash]--;
}
delete(records[node][version][nameHash][resource]);
emit DNSRecordDeleted(node, name, resource);
} else {
if (records[node][version][nameHash][resource].length == 0) {
nameEntriesCount[node][version][nameHash]++;
}
records[node][version][nameHash][resource] = rrData;
emit DNSRecordChanged(node, name, resource, rrData);
}
}
}
pragma solidity ^0.5.0;
contract InterfaceResolver is ResolverBase, AddrResolver {
bytes4 constant private INTERFACE_INTERFACE_ID = bytes4(keccak256("interfaceImplementer(bytes32,bytes4)"));
bytes4 private constant INTERFACE_META_ID = 0x01ffc9a7;
event InterfaceChanged(bytes32 indexed node, bytes4 indexed interfaceID, address implementer);
mapping(bytes32=>mapping(bytes4=>address)) interfaces;
/**
* Sets an interface associated with a name.
* Setting the address to 0 restores the default behaviour of querying the contract at `addr()` for interface support.
* @param node The node to update.
* @param interfaceID The EIP 165 interface ID.
* @param implementer The address of a contract that implements this interface for this node.
*/
function setInterface(bytes32 node, bytes4 interfaceID, address implementer) external authorised(node) {
interfaces[node][interfaceID] = implementer;
emit InterfaceChanged(node, interfaceID, implementer);
}
/**
* Returns the address of a contract that implements the specified interface for this name.
* If an implementer has not been set for this interfaceID and name, the resolver will query
* the contract at `addr()`. If `addr()` is set, a contract exists at that address, and that
* contract implements EIP165 and returns `true` for the specified interfaceID, its address
* will be returned.
* @param node The ENS node to query.
* @param interfaceID The EIP 165 interface ID to check for.
* @return The address that implements this interface, or 0 if the interface is unsupported.
*/
function interfaceImplementer(bytes32 node, bytes4 interfaceID) external view returns (address) {
address implementer = interfaces[node][interfaceID];
if(implementer != address(0)) {
return implementer;
}
address a = addr(node);
if(a == address(0)) {
return address(0);
}
(bool success, bytes memory returnData) = a.staticcall(abi.encodeWithSignature("supportsInterface(bytes4)", INTERFACE_META_ID));
if(!success || returnData.length < 32 || returnData[31] == 0) {
// EIP 165 not supported by target
return address(0);
}
(success, returnData) = a.staticcall(abi.encodeWithSignature("supportsInterface(bytes4)", interfaceID));
if(!success || returnData.length < 32 || returnData[31] == 0) {
// Specified interface not supported by target
return address(0);
}
return a;
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == INTERFACE_INTERFACE_ID || super.supportsInterface(interfaceID);
}
}
pragma solidity ^0.5.0;
contract NameResolver is ResolverBase {
bytes4 constant private NAME_INTERFACE_ID = 0x691f3431;
event NameChanged(bytes32 indexed node, string name);
mapping(bytes32=>string) names;
/**
* Sets the name associated with an ENS node, for reverse records.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param name The name to set.
*/
function setName(bytes32 node, string calldata name) external authorised(node) {
names[node] = name;
emit NameChanged(node, name);
}
/**
* Returns the name associated with an ENS node, for reverse records.
* Defined in EIP181.
* @param node The ENS node to query.
* @return The associated name.
*/
function name(bytes32 node) external view returns (string memory) {
return names[node];
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == NAME_INTERFACE_ID || super.supportsInterface(interfaceID);
}
}
pragma solidity ^0.5.0;
contract PubkeyResolver is ResolverBase {
bytes4 constant private PUBKEY_INTERFACE_ID = 0xc8690233;
event PubkeyChanged(bytes32 indexed node, bytes32 x, bytes32 y);
struct PublicKey {
bytes32 x;
bytes32 y;
}
mapping(bytes32=>PublicKey) pubkeys;
/**
* Sets the SECP256k1 public key associated with an ENS node.
* @param node The ENS node to query
* @param x the X coordinate of the curve point for the public key.
* @param y the Y coordinate of the curve point for the public key.
*/
function setPubkey(bytes32 node, bytes32 x, bytes32 y) external authorised(node) {
pubkeys[node] = PublicKey(x, y);
emit PubkeyChanged(node, x, y);
}
/**
* Returns the SECP256k1 public key associated with an ENS node.
* Defined in EIP 619.
* @param node The ENS node to query
* @return x, y the X and Y coordinates of the curve point for the public key.
*/
function pubkey(bytes32 node) external view returns (bytes32 x, bytes32 y) {
return (pubkeys[node].x, pubkeys[node].y);
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == PUBKEY_INTERFACE_ID || super.supportsInterface(interfaceID);
}
}
pragma solidity ^0.5.0;
contract TextResolver is ResolverBase {
bytes4 constant private TEXT_INTERFACE_ID = 0x59d1d43c;
event TextChanged(bytes32 indexed node, string indexed indexedKey, string key);
mapping(bytes32=>mapping(string=>string)) texts;
/**
* Sets the text data associated with an ENS node and key.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param key The key to set.
* @param value The text data value to set.
*/
function setText(bytes32 node, string calldata key, string calldata value) external authorised(node) {
texts[node][key] = value;
emit TextChanged(node, key, key);
}
/**
* Returns the text data associated with an ENS node and key.
* @param node The ENS node to query.
* @param key The text data key to query.
* @return The associated text data.
*/
function text(bytes32 node, string calldata key) external view returns (string memory) {
return texts[node][key];
}
function supportsInterface(bytes4 interfaceID) public pure returns(bool) {
return interfaceID == TEXT_INTERFACE_ID || super.supportsInterface(interfaceID);
}
}
pragma solidity ^0.5.0;
/**
* A simple resolver anyone can use; only allows the owner of a node to set its
* address.
*/
contract PublicResolver is ABIResolver, AddrResolver, ContentHashResolver, DNSResolver, InterfaceResolver, NameResolver, PubkeyResolver, TextResolver {
ENS ens;
/**
* A mapping of authorisations. An address that is authorised for a name
* may make any changes to the name that the owner could, but may not update
* the set of authorisations.
* (node, owner, caller) => isAuthorised
*/
mapping(bytes32=>mapping(address=>mapping(address=>bool))) public authorisations;
event AuthorisationChanged(bytes32 indexed node, address indexed owner, address indexed target, bool isAuthorised);
constructor(ENS _ens) public {
ens = _ens;
}
/**
* @dev Sets or clears an authorisation.
* Authorisations are specific to the caller. Any account can set an authorisation
* for any name, but the authorisation that is checked will be that of the
* current owner of a name. Thus, transferring a name effectively clears any
* existing authorisations, and new authorisations can be set in advance of
* an ownership transfer if desired.
*
* @param node The name to change the authorisation on.
* @param target The address that is to be authorised or deauthorised.
* @param isAuthorised True if the address should be authorised, or false if it should be deauthorised.
*/
function setAuthorisation(bytes32 node, address target, bool isAuthorised) external {
authorisations[node][msg.sender][target] = isAuthorised;
emit AuthorisationChanged(node, msg.sender, target, isAuthorised);
}
function isAuthorised(bytes32 node) internal view returns(bool) {
address owner = ens.owner(node);
return owner == msg.sender || authorisations[node][owner][msg.sender];
}
}
|
Copy word-length chunks while possible
|
function memcpy(uint dest, uint src, uint len) private pure {
for (; len >= 32; len -= 32) {
assembly {
mstore(dest, mload(src))
}
dest += 32;
src += 32;
}
assembly {
let srcpart := and(mload(src), not(mask))
let destpart := and(mload(dest), mask)
mstore(dest, or(destpart, srcpart))
}
}
| 15,497
|
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pragma solidity ^0.4.18;
// File: zeppelin-solidity/contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
// File: zeppelin-solidity/contracts/lifecycle/Destructible.sol
/**
* @title Destructible
* @dev Base contract that can be destroyed by owner. All funds in contract will be sent to the owner.
*/
contract Destructible is Ownable {
function Destructible() public payable { }
/**
* @dev Transfers the current balance to the owner and terminates the contract.
*/
function destroy() onlyOwner public {
selfdestruct(owner);
}
function destroyAndSend(address _recipient) onlyOwner public {
selfdestruct(_recipient);
}
}
// File: zeppelin-solidity/contracts/lifecycle/Pausable.sol
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
// File: zeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// File: zeppelin-solidity/contracts/payment/PullPayment.sol
/**
* @title PullPayment
* @dev Base contract supporting async send for pull payments. Inherit from this
* contract and use asyncSend instead of send.
*/
contract PullPayment {
using SafeMath for uint256;
mapping(address => uint256) public payments;
uint256 public totalPayments;
/**
* @dev withdraw accumulated balance, called by payee.
*/
function withdrawPayments() public {
address payee = msg.sender;
uint256 payment = payments[payee];
require(payment != 0);
require(this.balance >= payment);
totalPayments = totalPayments.sub(payment);
payments[payee] = 0;
assert(payee.send(payment));
}
/**
* @dev Called by the payer to store the sent amount as credit to be pulled.
* @param dest The destination address of the funds.
* @param amount The amount to transfer.
*/
function asyncSend(address dest, uint256 amount) internal {
payments[dest] = payments[dest].add(amount);
totalPayments = totalPayments.add(amount);
}
}
// File: contracts/GoGlobals.sol
/// @title The base contract for EthernalGo, contains the admin functions and the globals used throught the game
/// @author https://www.EthernalGo.com
/// @dev See the GoGameLogic and GoBoardMetaDetails contract documentation to understand the actual game mechanics.
contract GoGlobals is Ownable, PullPayment, Destructible, Pausable {
// Used for simplifying capture calculations
uint8 constant MAX_UINT8 = 255;
// Used to dermine player color and who is up next
enum PlayerColor {None, Black, White}
/// @dev Board status is a critical concept that determines which actions can be taken within each phase
/// WaitForOpponent - When the first player has registered and waiting for a second player
/// InProgress - The match is on! The acting player can choose between placing a stone or passing (or resigning)
/// WaitingToResolve - Both players chose to pass their turn and we are waiting for the winner to ask the contract for score count
/// BlackWin, WhiteWin, Draw - Pretty self explanatory
/// Canceled - The first player who joined the board is allowed to cancel a match if no opponent has joined yet
enum BoardStatus {WaitForOpponent, InProgress, WaitingToResolve, BlackWin, WhiteWin, Draw, Canceled}
// We staretd with a 9x9 rows
uint8 constant BOARD_ROW_SIZE = 9;
uint8 constant BOARD_SIZE = BOARD_ROW_SIZE ** 2;
// We use a shrinked board size to optimize gas costs
uint8 constant SHRINKED_BOARD_SIZE = 21;
// These are the shares each player and EthernalGo are getting for each game
uint public WINNER_SHARE;
uint public HOST_SHARE;
uint public HONORABLE_LOSS_BONUS;
// Each player gets PLAYER_TURN_SINGLE_PERIOD x PLAYER_START_PERIODS to act. These may change according to player feedback and network conjunction to optimize the playing experience
uint public PLAYER_TURN_SINGLE_PERIOD = 4 minutes;
uint8 public PLAYER_START_PERIODS = 5;
// We decided to restrict the table stakes to several options to allow for easier match-making
uint[] public tableStakesOptions;
// This is the main data field that contains access to all of the GoBoards that were created
GoBoard[] internal allBoards;
// The CFO is the only account that is allowed to withdraw funds
address public CFO;
// This is the main board structure and is instantiated for every new game
struct GoBoard {
// We use the last update to determine how long has it been since the player could act
uint lastUpdate;
// The table stakes marks how much ETH each participant needs to pay to register for the board
uint tableStakes;
// The board balance keeps track of how much ETH this board has in order to see if we already distributed the payments for this match
uint boardBalance;
// Black and white player addresses
address blackAddress;
address whiteAddress;
// Black and white time periods remaining (initially they will be PLAYER_START_PERIODS)
uint8 blackPeriodsRemaining;
uint8 whitePeriodsRemaining;
// Keep track of double pass to finish the game
bool didPassPrevTurn;
// Keep track of double pass to finish the game
bool isHonorableLoss;
// Who's next
PlayerColor nextTurnColor;
// Use a mapping to figure out which stone is set in which position. (Positions can be 0-BOARD_SIZE)
// @dev We decided not use an array to minimize the storage cost
mapping(uint8=>uint8) positionToColor;
// The board's current status
BoardStatus status;
}
/// @notice The constructor is called with our inital values, they will probably change but this is what had in mind when developing the game.
function GoGlobals() public Ownable() PullPayment() Destructible() {
// Add initial price tiers so from variouos ranges
addPriceTier(0.5 ether);
addPriceTier(1 ether);
addPriceTier(5 ether);
// These are the inital shares we've had in mind when developing the game
updateShares(950, 50, 5);
// The CFO will be the owner, but it will change soon after the contract is deployed
CFO = owner;
}
/// @notice In case we need extra price tiers (table stakes where people can play) we can add additional ones
/// @param price the price for the new price tier in WEI
function addPriceTier(uint price) public onlyOwner {
tableStakesOptions.push(price);
}
/// If we need to update price tiers
/// @param priceTier the tier index from the array
/// @param price the new price to set
function updatePriceTier(uint8 priceTier, uint price) public onlyOwner {
tableStakesOptions[priceTier] = price;
}
/// @notice If we need to adjust the amounts players or EthernalGo gets for each game
/// @param newWinnerShare the winner's share (out of 1000)
/// @param newHostShare EthernalGo's share (out of 1000)
/// @param newBonusShare Bonus that comes our of EthernalGo and goes to the loser in case of an honorable loss (out of 1000)
function updateShares(uint newWinnerShare, uint newHostShare, uint newBonusShare) public onlyOwner {
require(newWinnerShare + newHostShare == 1000);
WINNER_SHARE = newWinnerShare;
HOST_SHARE = newHostShare;
HONORABLE_LOSS_BONUS = newBonusShare;
}
/// @notice Separating the CFO and the CEO responsibilities requires the ability to set the CFO account
/// @param newCFO the new CFO
function setNewCFO(address newCFO) public onlyOwner {
require(newCFO != 0);
CFO = newCFO;
}
/// @notice Separating the CFO and the CEO responsibilities requires the ability to set the CFO account
/// @param secondsPerPeriod The number of seconds we would like each period to last
/// @param numberOfPeriods The number of of periods each player initially has
function updateGameTimes(uint secondsPerPeriod, uint8 numberOfPeriods) public onlyOwner {
PLAYER_TURN_SINGLE_PERIOD = secondsPerPeriod;
PLAYER_START_PERIODS = numberOfPeriods;
}
/// @dev Convinience function to access the shares
function getShares() public view returns(uint, uint, uint) {
return (WINNER_SHARE, HOST_SHARE, HONORABLE_LOSS_BONUS);
}
}
// File: contracts/GoBoardMetaDetails.sol
/// @title This contract manages the meta details of EthernalGo.
/// Registering to a board, splitting the revenues and other day-to-day actions that are unrelated to the actual game
/// @author https://www.EthernalGo.com
/// @dev See the GoGameLogic to understand the actual game mechanics and rules
contract GoBoardMetaDetails is GoGlobals {
/// @dev The player added to board event can be used to check upon registration success
event PlayerAddedToBoard(uint boardId, address playerAddress);
/// @dev The board updated status can be used to get the new board status
event BoardStatusUpdated(uint boardId, BoardStatus newStatus);
/// @dev The player withdrawn his accumulated balance
event PlayerWithdrawnBalance(address playerAddress);
/// @dev Simple wrapper to return the number of boards in total
function getTotalNumberOfBoards() public view returns(uint) {
return allBoards.length;
}
/// @notice We would like to easily and transparantly share the game's statistics with anyone and present on the web-app
function getCompletedGamesStatistics() public view returns(uint, uint) {
uint completed = 0;
uint ethPaid = 0;
// @dev Go through all the boards, we start with 1 as it's an unsigned int
for (uint i = 1; i <= allBoards.length; i++) {
// Get the current board
GoBoard storage board = allBoards[i - 1];
// Check if it was a victory, otherwise it's not interesting as the players just got their deposit back
if ((board.status == BoardStatus.BlackWin) || (board.status == BoardStatus.WhiteWin)) {
++completed;
// We need to query the table stakes as the board's balance will be zero once a game is finished
ethPaid += board.tableStakes.mul(2);
}
}
return (completed, ethPaid);
}
/// @dev At this point there is no support for returning dynamic arrays (it's supported for web3 calls but not for internal testing) so we will "only" present the recent 50 games per player.
uint8 constant PAGE_SIZE = 50;
/// @dev Make sure this board is in waiting for result status
modifier boardWaitingToResolve(uint boardId){
require(allBoards[boardId].status == BoardStatus.WaitingToResolve);
_;
}
/// @dev Make sure this board is in one of the end of game states
modifier boardGameEnded(GoBoard storage board){
require(isEndGameStatus(board.status));
_;
}
/// @dev Make sure this board still has balance
modifier boardNotPaid(GoBoard storage board){
require(board.boardBalance > 0);
_;
}
/// @dev Make sure this board still has a spot for at least one player to join
modifier boardWaitingForPlayers(uint boardId){
require(allBoards[boardId].status == BoardStatus.WaitForOpponent &&
(allBoards[boardId].blackAddress == 0 ||
allBoards[boardId].whiteAddress == 0));
_;
}
/// @dev Restricts games for the allowed table stakes
/// @param value the value we are looking for to register
modifier allowedValuesOnly(uint value){
bool didFindValue = false;
// The number of tableStakesOptions can change hence it has to be dynamic
for (uint8 i = 0; i < tableStakesOptions.length; ++ i) {
if (value == tableStakesOptions[i])
didFindValue = true;
}
require (didFindValue);
_;
}
/// @dev Checks a status if and returns if it's an end game
/// @param status the value we are checking
/// @return true if it's an end-game status
function isEndGameStatus(BoardStatus status) public pure returns(bool) {
return (status == BoardStatus.BlackWin) || (status == BoardStatus.WhiteWin) || (status == BoardStatus.Draw) || (status == BoardStatus.Canceled);
}
/// @dev Gets the update time for a board
/// @param boardId The id of the board to check
/// @return the update timestamp in seconds
function getBoardUpdateTime(uint boardId) public view returns(uint) {
GoBoard storage board = allBoards[boardId];
return (board.lastUpdate);
}
/// @dev Gets the current board status
/// @param boardId The id of the board to check
/// @return the current board status
function getBoardStatus(uint boardId) public view returns(BoardStatus) {
GoBoard storage board = allBoards[boardId];
return (board.status);
}
/// @dev Gets the current balance of the board
/// @param boardId The id of the board to check
/// @return the current board balance in WEI
function getBoardBalance(uint boardId) public view returns(uint) {
GoBoard storage board = allBoards[boardId];
return (board.boardBalance);
}
/// @dev Sets the current balance of the board, this is internal and is triggerred by functions run by external player actions
/// @param board The board to update
/// @param boardId The board's Id
/// @param newStatus The new status to set
function updateBoardStatus(GoBoard storage board, uint boardId, BoardStatus newStatus) internal {
// Save gas if we accidentally are trying to update to an existing update
if (newStatus != board.status) {
// Set the new board status
board.status = newStatus;
// Update the time (important for start and finish states)
board.lastUpdate = now;
// If this is an end game status
if (isEndGameStatus(newStatus)) {
// Credit the players accoriding to the board score
creditBoardGameRevenues(board);
}
// Notify status update
BoardStatusUpdated(boardId, newStatus);
}
}
/// @dev Overload to set the board status when we only have a boardId
/// @param boardId The boardId to update
/// @param newStatus The new status to set
function updateBoardStatus(uint boardId, BoardStatus newStatus) internal {
updateBoardStatus(allBoards[boardId], boardId, newStatus);
}
/// @dev Gets the player color given an address and board (overload for when we only have boardId)
/// @param boardId The boardId to check
/// @param searchAddress The player's address we are searching for
/// @return the player's color
function getPlayerColor(uint boardId, address searchAddress) internal view returns (PlayerColor) {
return (getPlayerColor(allBoards[boardId], searchAddress));
}
/// @dev Gets the player color given an address and board
/// @param board The board to check
/// @param searchAddress The player's address we are searching for
/// @return the player's color
function getPlayerColor(GoBoard storage board, address searchAddress) internal view returns (PlayerColor) {
// Check if this is the black player
if (board.blackAddress == searchAddress) {
return (PlayerColor.Black);
}
// Check if this is the white player
if (board.whiteAddress == searchAddress) {
return (PlayerColor.White);
}
// We aren't suppose to try and get the color of a player if they aren't on the board
revert();
}
/// @dev Gets the player address given a color on the board
/// @param boardId The board to check
/// @param color The color of the player we want
/// @return the player's address
function getPlayerAddress(uint boardId, PlayerColor color) public view returns(address) {
// If it's the black player
if (color == PlayerColor.Black) {
return allBoards[boardId].blackAddress;
}
// If it's the white player
if (color == PlayerColor.White) {
return allBoards[boardId].whiteAddress;
}
// We aren't suppose to try and get the color of a player if they aren't on the board
revert();
}
/// @dev Check if a player is on board (overload for boardId)
/// @param boardId The board to check
/// @param searchAddress the player's address we want to check
/// @return true if the player is playing in the board
function isPlayerOnBoard(uint boardId, address searchAddress) public view returns(bool) {
return (isPlayerOnBoard(allBoards[boardId], searchAddress));
}
/// @dev Check if a player is on board
/// @param board The board to check
/// @param searchAddress the player's address we want to check
/// @return true if the player is playing in the board
function isPlayerOnBoard(GoBoard storage board, address searchAddress) private view returns(bool) {
return (board.blackAddress == searchAddress || board.whiteAddress == searchAddress);
}
/// @dev Check which player acts next
/// @param boardId The board to check
/// @return The color of the current player to act
function getNextTurnColor(uint boardId) public view returns(PlayerColor) {
return allBoards[boardId].nextTurnColor;
}
/// @notice This is the first function a player will be using in order to start playing. This function allows
/// to register to an existing or a new board, depending on the current available boards.
/// Upon registeration the player will pay the board's stakes and will be the black or white player.
/// The black player also creates the board, and is the first player which gives a small advantage in the
/// game, therefore we decided that the black player will be the one paying for the additional gas
/// that is required to create the board.
/// @param tableStakes The tablestakes to use, although this appears in the "value" of the message, we preferred to
/// add it as an additional parameter for client use for clients that allow to customize the value parameter.
/// @return The boardId the player registered to (either a new board or an existing board)
function registerPlayerToBoard(uint tableStakes) external payable allowedValuesOnly(msg.value) whenNotPaused returns(uint) {
// Make sure the value and tableStakes are the same
require (msg.value == tableStakes);
GoBoard storage boardToJoin;
uint boardIDToJoin;
// Check which board to connect to
(boardIDToJoin, boardToJoin) = getOrCreateWaitingBoard(tableStakes);
// Add the player to the board (they already paid)
bool shouldStartGame = addPlayerToBoard(boardToJoin, tableStakes);
// Fire the event for anyone listening
PlayerAddedToBoard(boardIDToJoin, msg.sender);
// If we have both players, start the game
if (shouldStartGame) {
// Start the game
startBoardGame(boardToJoin, boardIDToJoin);
}
return boardIDToJoin;
}
/// @notice This function allows a player to cancel a match in the case they were waiting for an opponent for
/// a long time but didn't find anyone and would want to get their deposit of table stakes back.
/// That player may cancel the game as long as no opponent was found and the deposit will be returned in full (though gas fees still apply). The player will also need to withdraw funds from the contract after this action.
/// @param boardId The board to cancel
function cancelMatch(uint boardId) external {
// Get the player
GoBoard storage board = allBoards[boardId];
// Make sure this player is on board
require(isPlayerOnBoard(boardId, msg.sender));
// Make sure that the game hasn't started
require(board.status == BoardStatus.WaitForOpponent);
// Update the board status to cancel (which also triggers the revenue sharing function)
updateBoardStatus(board, boardId, BoardStatus.Canceled);
}
/// @dev Gets the current player boards to present to the player as needed
/// @param activeTurnsOnly We might want to highlight the boards where the player is expected to act
/// @return an array of PAGE_SIZE with the number of boards found and the actual IDs
function getPlayerBoardsIDs(bool activeTurnsOnly) public view returns (uint, uint[PAGE_SIZE]) {
uint[PAGE_SIZE] memory playerBoardIDsToReturn;
uint numberOfPlayerBoardsToReturn = 0;
// Look at the recent boards until you find a player board
for (uint currBoard = allBoards.length; currBoard > 0 && numberOfPlayerBoardsToReturn < PAGE_SIZE; currBoard--) {
uint boardID = currBoard - 1;
// We only care about boards the player is in
if (isPlayerOnBoard(boardID, msg.sender)) {
// Check if the player is the next to act, or just include it if it wasn't requested
if (!activeTurnsOnly || getNextTurnColor(boardID) == getPlayerColor(boardID, msg.sender)) {
playerBoardIDsToReturn[numberOfPlayerBoardsToReturn] = boardID;
++numberOfPlayerBoardsToReturn;
}
}
}
return (numberOfPlayerBoardsToReturn, playerBoardIDsToReturn);
}
/// @dev Creates a new board in case no board was found for a player to register
/// @param tableStakesToUse The value used to set the board
/// @return the id of new board (which is it's position in the allBoards array)
function createNewGoBoard(uint tableStakesToUse) private returns(uint, GoBoard storage) {
GoBoard memory newBoard = GoBoard({lastUpdate: now,
isHonorableLoss: false,
tableStakes: tableStakesToUse,
boardBalance: 0,
blackAddress: 0,
whiteAddress: 0,
blackPeriodsRemaining: PLAYER_START_PERIODS,
whitePeriodsRemaining: PLAYER_START_PERIODS,
nextTurnColor: PlayerColor.None,
status:BoardStatus.WaitForOpponent,
didPassPrevTurn:false});
uint boardId = allBoards.push(newBoard) - 1;
return (boardId, allBoards[boardId]);
}
/// @dev Creates a new board in case no board was found for a player to register
/// @param tableStakes The value used to set the board
/// @return the id of new board (which is it's position in the allBoards array)
function getOrCreateWaitingBoard(uint tableStakes) private returns(uint, GoBoard storage) {
bool wasFound = false;
uint selectedBoardId = 0;
GoBoard storage board;
// First, try to find a board that has an empty spot and the right table stakes
for (uint i = allBoards.length; i > 0 && !wasFound; --i) {
board = allBoards[i - 1];
// Make sure this board is already waiting and it's stakes are the same
if (board.tableStakes == tableStakes) {
// If this board is waiting for an opponent
if (board.status == BoardStatus.WaitForOpponent) {
// Awesome, we have the board and we are done
wasFound = true;
selectedBoardId = i - 1;
}
// If we found the rights stakes board but it isn't waiting for player we won't have another empty board.
// We need to create a new one
break;
}
}
// Create a new board if we couldn't find one
if (!wasFound) {
(selectedBoardId, board) = createNewGoBoard(tableStakes);
}
return (selectedBoardId, board);
}
/// @dev Starts the game and sets everything up for the match
/// @param board The board to update with the starting data
/// @param boardId The board's Id
function startBoardGame(GoBoard storage board, uint boardId) private {
// Make sure both players are present
require(board.blackAddress != 0 && board.whiteAddress != 0);
// The black is always the first player in GO
board.nextTurnColor = PlayerColor.Black;
// Save the game start time and set the game status to in progress
updateBoardStatus(board, boardId, BoardStatus.InProgress);
}
/// @dev Handles the registration of a player to a board
/// @param board The board to update with the starting data
/// @param paidAmount The amount the player paid to start playing (will be added to the board balance)
/// @return true if the game should be started
function addPlayerToBoard(GoBoard storage board, uint paidAmount) private returns(bool) {
// Make suew we are still waitinf for opponent (otherwise we can't add players)
bool shouldStartTheGame = false;
require(board.status == BoardStatus.WaitForOpponent);
// Check that the player isn't already on the board, otherwise they would pay twice for a single board... :(
require(!isPlayerOnBoard(board, msg.sender));
// We always add the black player first as they created the board
if (board.blackAddress == 0) {
board.blackAddress = msg.sender;
// If we have a black player, add the white player
} else if (board.whiteAddress == 0) {
board.whiteAddress = msg.sender;
// Once the white player has been added, we can start the match
shouldStartTheGame = true;
// If both addresses are occuipied and we got here, it's a problem
} else {
revert();
}
// Credit the board with what we know
board.boardBalance += paidAmount;
return shouldStartTheGame;
}
/// @dev Helper function to caclulate how much time a player used since now
/// @param lastUpdate the timestamp of last update of the board
/// @return the number of periods used for this time
function getTimePeriodsUsed(uint lastUpdate) private view returns(uint8) {
return uint8(now.sub(lastUpdate).div(PLAYER_TURN_SINGLE_PERIOD));
}
/// @notice Convinience function to help present how much time a player has.
/// @param boardId the board to check.
/// @param color the color of the player to check.
/// @return The number of time periods the player has, the number of seconds per each period and the total number of seconds for convinience.
function getPlayerRemainingTime(uint boardId, PlayerColor color) view external returns (uint, uint, uint) {
GoBoard storage board = allBoards[boardId];
// Always verify we can act
require(board.status == BoardStatus.InProgress);
// Get the total remaining time:
uint timePeriods = getPlayerTimePeriods(board, color);
uint totalTimeRemaining = timePeriods * PLAYER_TURN_SINGLE_PERIOD;
// If this is the acting player
if (color == board.nextTurnColor) {
// Calc time periods for player
uint timePeriodsUsed = getTimePeriodsUsed(board.lastUpdate);
if (timePeriods > timePeriodsUsed) {
timePeriods -= timePeriodsUsed;
} else {
timePeriods = 0;
}
// Calc total time remaining for player
uint timeUsed = (now - board.lastUpdate);
// Safely reduce the time used
if (totalTimeRemaining > timeUsed) {
totalTimeRemaining -= timeUsed;
// A player can't have less than zero time to act
} else {
totalTimeRemaining = 0;
}
}
return (timePeriods, PLAYER_TURN_SINGLE_PERIOD, totalTimeRemaining);
}
/// @dev After a player acted we might need to reduce the number of remaining time periods.
/// @param board The board the player acted upon.
/// @param color the color of the player that acted.
/// @param timePeriodsUsed the number of periods the player used.
function updatePlayerTimePeriods(GoBoard storage board, PlayerColor color, uint8 timePeriodsUsed) internal {
// Reduce from the black player
if (color == PlayerColor.Black) {
// The player can't have less than 0 periods remaining
board.blackPeriodsRemaining = board.blackPeriodsRemaining > timePeriodsUsed ? board.blackPeriodsRemaining - timePeriodsUsed : 0;
// Reduce from the white player
} else if (color == PlayerColor.White) {
// The player can't have less than 0 periods remaining
board.whitePeriodsRemaining = board.whitePeriodsRemaining > timePeriodsUsed ? board.whitePeriodsRemaining - timePeriodsUsed : 0;
// We are not supposed to get here
} else {
revert();
}
}
/// @dev Helper function to access the time periods of a player in a board.
/// @param board The board to check.
/// @param color the color of the player to check.
/// @return The number of time periods remaining for this player
function getPlayerTimePeriods(GoBoard storage board, PlayerColor color) internal view returns (uint8) {
// For the black player
if (color == PlayerColor.Black) {
return board.blackPeriodsRemaining;
// For the white player
} else if (color == PlayerColor.White) {
return board.whitePeriodsRemaining;
// We are not supposed to get here
} else {
revert();
}
}
/// @notice The main function to split game revenues, this is triggered only by changing the game's state
/// to one of the ending game states.
/// We make sure this board has a balance and that it's only running once a board game has ended
/// We used numbers for easier read through as this function is critical for the revenue sharing model
/// @param board The board the credit will come from.
function creditBoardGameRevenues(GoBoard storage board) private boardGameEnded(board) boardNotPaid(board) {
// Get the shares from the globals
uint updatedHostShare = HOST_SHARE;
uint updatedLoserShare = 0;
// Start accumulating funds for each participant and EthernalGo's CFO
uint amountBlack = 0;
uint amountWhite = 0;
uint amountCFO = 0;
uint fullAmount = 1000;
// Incentivize resigns and quick end-games for the loser
if (board.status == BoardStatus.BlackWin || board.status == BoardStatus.WhiteWin) {
// In case the game ended honorably (not by time out), the loser will get credit (from the CFO's share)
if (board.isHonorableLoss) {
// Reduce the credit from the CFO
updatedHostShare = HOST_SHARE - HONORABLE_LOSS_BONUS;
// Add to the loser share
updatedLoserShare = HONORABLE_LOSS_BONUS;
}
// If black won
if (board.status == BoardStatus.BlackWin) {
// Black should get the winner share
amountBlack = board.boardBalance.mul(WINNER_SHARE).div(fullAmount);
// White player should get the updated loser share (with or without the bonus)
amountWhite = board.boardBalance.mul(updatedLoserShare).div(fullAmount);
}
// If white won
if (board.status == BoardStatus.WhiteWin) {
// White should get the winner share
amountWhite = board.boardBalance.mul(WINNER_SHARE).div(fullAmount);
// Black should get the updated loser share (with or without the bonus)
amountBlack = board.boardBalance.mul(updatedLoserShare).div(fullAmount);
}
// The CFO should get the updates share if the game ended as expected
amountCFO = board.boardBalance.mul(updatedHostShare).div(fullAmount);
}
// If the match ended in a draw or it was cancelled
if (board.status == BoardStatus.Draw || board.status == BoardStatus.Canceled) {
// The CFO is not taking a share from draw or a cancelled match
amountCFO = 0;
// If the white player was on board, we should split the balance in half
if (board.whiteAddress != 0) {
// Each player gets half of the balance
amountBlack = board.boardBalance.div(2);
amountWhite = board.boardBalance.div(2);
// If there was only the black player, they should get the entire balance
} else {
amountBlack = board.boardBalance;
}
}
// Make sure we are going to split the entire amount and nothing gets left behind
assert(amountBlack + amountWhite + amountCFO == board.boardBalance);
// Reset the balance
board.boardBalance = 0;
// Async sends to the participants (this means each participant will be required to withdraw funds)
asyncSend(board.blackAddress, amountBlack);
asyncSend(board.whiteAddress, amountWhite);
asyncSend(CFO, amountCFO);
}
/// @dev withdraw accumulated balance, called by payee.
function withdrawPayments() public {
// Call Zeppelin's withdrawPayments
super.withdrawPayments();
// Send an event
PlayerWithdrawnBalance(msg.sender);
}
}
// File: contracts/GoGameLogic.sol
/// @title The actual game logic for EthernalGo - setting stones, capturing, etc.
/// @author https://www.EthernalGo.com
contract GoGameLogic is GoBoardMetaDetails {
/// @dev The StoneAddedToBoard event is fired when a new stone is added to the board,
/// and includes the board Id, stone color, row & column. This event will fire even if it was a suicide stone.
event StoneAddedToBoard(uint boardId, PlayerColor color, uint8 row, uint8 col);
/// @dev The PlayerPassedTurn event is fired when a player passes turn
/// and includes the board Id, color.
event PlayerPassedTurn(uint boardId, PlayerColor color);
/// @dev Updating the player's time periods left, according to the current time - board last update time.
/// If the player does not have enough time and chose to act, the game will end and the player will lose.
/// @param board is the relevant board.
/// @param boardId is the board's Id.
/// @param color is the color of the player we want to update.
/// @return true if the player can continue playing, otherwise false.
function updatePlayerTime(GoBoard storage board, uint boardId, PlayerColor color) private returns(bool) {
// Verify that the board is in progress and that it's the current player
require(board.status == BoardStatus.InProgress && board.nextTurnColor == color);
// Calculate time periods used by the player
uint timePeriodsUsed = uint(now.sub(board.lastUpdate).div(PLAYER_TURN_SINGLE_PERIOD));
// Subtract time periods if needed
if (timePeriodsUsed > 0) {
// Can't spend more than MAX_UINT8
updatePlayerTimePeriods(board, color, timePeriodsUsed > MAX_UINT8 ? MAX_UINT8 : uint8(timePeriodsUsed));
// The player losses when there aren't any time periods left
if (getPlayerTimePeriods(board, color) == 0) {
playerLost(board, boardId, color);
return false;
}
}
return true;
}
/// @notice Updates the board status according to the players score.
/// Can only be called when the board is in a 'waitingToResolve' status.
/// @param boardId is the board to check and update
function checkVictoryByScore(uint boardId) external boardWaitingToResolve(boardId) {
uint8 blackScore;
uint8 whiteScore;
// Get the players' score
(blackScore, whiteScore) = calculateBoardScore(boardId);
// Default to Draw
BoardStatus status = BoardStatus.Draw;
// If black's score is bigger than white's score, black is the winner
if (blackScore > whiteScore) {
status = BoardStatus.BlackWin;
// If white's score is bigger, white is the winner
} else if (whiteScore > blackScore) {
status = BoardStatus.WhiteWin;
}
// Update the board's status
updateBoardStatus(boardId, status);
}
/// @notice Performs a pass action on a psecific board, only by the current active color player.
/// @param boardId is the board to perform pass on.
function passTurn(uint boardId) external {
// Get the board & player
GoBoard storage board = allBoards[boardId];
PlayerColor activeColor = getPlayerColor(board, msg.sender);
// Verify the player can act
require(board.status == BoardStatus.InProgress && board.nextTurnColor == activeColor);
// Check if this player can act
if (updatePlayerTime(board, boardId, activeColor)) {
// If it's the second straight pass, the game is over
if (board.didPassPrevTurn) {
// Finishing the game like this is considered honorable
board.isHonorableLoss = true;
// On second pass, the board status changes to 'WaitingToResolve'
updateBoardStatus(board, boardId, BoardStatus.WaitingToResolve);
// If it's the first pass, we can simply continue
} else {
// Move to the next player, flag that it was a pass action
nextTurn(board);
board.didPassPrevTurn = true;
// Notify the player passed turn
PlayerPassedTurn(boardId, activeColor);
}
}
}
/// @notice Resigns a player from a specific board, can get called by either player on the board.
/// @param boardId is the board to resign from.
function resignFromMatch(uint boardId) external {
// Get the board, make sure it's in progress
GoBoard storage board = allBoards[boardId];
require(board.status == BoardStatus.InProgress);
// Get the sender's color
PlayerColor activeColor = getPlayerColor(board, msg.sender);
// Finishing the game like this is considered honorable
board.isHonorableLoss = true;
// Set that color as the losing player
playerLost(board, boardId, activeColor);
}
/// @notice Claiming the current acting player on the board is out of time, thus losses the game.
/// @param boardId is the board to claim it on.
function claimActingPlayerOutOfTime(uint boardId) external {
// Get the board, make sure it's in progress
GoBoard storage board = allBoards[boardId];
require(board.status == BoardStatus.InProgress);
// Get the acting player color
PlayerColor actingPlayerColor = getNextTurnColor(boardId);
// Calculate remaining allowed time for the acting player
uint playerTimeRemaining = PLAYER_TURN_SINGLE_PERIOD * getPlayerTimePeriods(board, actingPlayerColor);
// If the player doesn't have enough time left, the player losses
if (playerTimeRemaining < now - board.lastUpdate) {
playerLost(board, boardId, actingPlayerColor);
}
}
/// @dev Update a board status with a losing color
/// @param board is the board to update.
/// @param boardId is the board's Id.
/// @param color is the losing player's color.
function playerLost(GoBoard storage board, uint boardId, PlayerColor color) private {
// If black is the losing color, white wins
if (color == PlayerColor.Black) {
updateBoardStatus(board, boardId, BoardStatus.WhiteWin);
// If white is the losing color, black wins
} else if (color == PlayerColor.White) {
updateBoardStatus(board, boardId, BoardStatus.BlackWin);
// There's an error, revert
} else {
revert();
}
}
/// @dev Internally used to move to the next turn, by switching sides and updating the board last update time.
/// @param board is the board to update.
function nextTurn(GoBoard storage board) private {
// Switch sides
board.nextTurnColor = board.nextTurnColor == PlayerColor.Black ? PlayerColor.White : PlayerColor.Black;
// Last update time
board.lastUpdate = now;
}
/// @notice Adding a stone to a specific board and position (row & col).
/// Requires the board to be in progress, that the caller is the acting player,
/// and that the spot on the board is empty.
/// @param boardId is the board to add the stone to.
/// @param row is the row for the new stone.
/// @param col is the column for the new stone.
function addStoneToBoard(uint boardId, uint8 row, uint8 col) external {
// Get the board & sender's color
GoBoard storage board = allBoards[boardId];
PlayerColor activeColor = getPlayerColor(board, msg.sender);
// Verify the player can act
require(board.status == BoardStatus.InProgress && board.nextTurnColor == activeColor);
// Calculate the position
uint8 position = row * BOARD_ROW_SIZE + col;
// Check that it's an empty spot
require(board.positionToColor[position] == 0);
// Update the player timeout (if the player doesn't have time left, discontinue)
if (updatePlayerTime(board, boardId, activeColor)) {
// Set the stone on the board
board.positionToColor[position] = uint8(activeColor);
// Run capture / suidice logic
updateCaptures(board, position, uint8(activeColor));
// Next turn logic
nextTurn(board);
// Clear the pass flag
if (board.didPassPrevTurn) {
board.didPassPrevTurn = false;
}
// Fire the event
StoneAddedToBoard(boardId, activeColor, row, col);
}
}
/// @notice Returns a board's row details, specifies which color occupies which cell in that row.
/// @dev It returns a row and not the entire board because some nodes might fail to return arrays larger than ~50.
/// @param boardId is the board to inquire.
/// @param row is the row to get details on.
/// @return an array that contains the colors occupying each cell in that row.
function getBoardRowDetails(uint boardId, uint8 row) external view returns (uint8[BOARD_ROW_SIZE]) {
// The array to return
uint8[BOARD_ROW_SIZE] memory rowToReturn;
// For all columns, calculate the position and get the current status
for (uint8 col = 0; col < BOARD_ROW_SIZE; col++) {
uint8 position = row * BOARD_ROW_SIZE + col;
rowToReturn[col] = allBoards[boardId].positionToColor[position];
}
// Return the array
return (rowToReturn);
}
/// @notice Returns the current color of a specific position in a board.
/// @param boardId is the board to inquire.
/// @param row is part of the position to get details on.
/// @param col is part of the position to get details on.
/// @return the color occupying that position.
function getBoardSingleSpaceDetails(uint boardId, uint8 row, uint8 col) external view returns (uint8) {
uint8 position = row * BOARD_ROW_SIZE + col;
return allBoards[boardId].positionToColor[position];
}
/// @dev Calcultes whether a position captures an enemy group, or whether it's a suicide.
/// Updates the board accoridngly (clears captured groups, or the suiciding stone).
/// @param board the board to check and update
/// @param position the position of the new stone
/// @param positionColor the color of the new stone (this param is sent to spare another reading op)
function updateCaptures(GoBoard storage board, uint8 position, uint8 positionColor) private {
// Group positions, used later
uint8[BOARD_SIZE] memory group;
// Is group captured, or free
bool isGroupCaptured;
// In order to save gas, we check suicide only if the position is fully surrounded and doesn't capture enemy groups
bool shouldCheckSuicide = true;
// Get the position's adjacent cells
uint8[MAX_ADJACENT_CELLS] memory adjacentArray = getAdjacentCells(position);
// Run as long as there an adjacent cell, or until we reach the end of the array
for (uint8 currAdjacentIndex = 0; currAdjacentIndex < MAX_ADJACENT_CELLS && adjacentArray[currAdjacentIndex] < MAX_UINT8; currAdjacentIndex++) {
// Get the adjacent cell's color
uint8 currColor = board.positionToColor[adjacentArray[currAdjacentIndex]];
// If the enemy's color
if (currColor != 0 && currColor != positionColor) {
// Get the group's info
(group, isGroupCaptured) = getGroup(board, adjacentArray[currAdjacentIndex], currColor);
// Captured a group
if (isGroupCaptured) {
// Clear the group from the board
for (uint8 currGroupIndex = 0; currGroupIndex < BOARD_SIZE && group[currGroupIndex] < MAX_UINT8; currGroupIndex++) {
board.positionToColor[group[currGroupIndex]] = 0;
}
// Shouldn't check suicide
shouldCheckSuicide = false;
}
// There's an empty adjacent cell
} else if (currColor == 0) {
// Shouldn't check suicide
shouldCheckSuicide = false;
}
}
// Detect suicide if needed
if (shouldCheckSuicide) {
// Get the new stone's surrounding group
(group, isGroupCaptured) = getGroup(board, position, positionColor);
// If the group is captured, it's a suicide move, remove it
if (isGroupCaptured) {
// Clear added stone
board.positionToColor[position] = 0;
}
}
}
/// @dev Internally used to set a flag in a shrinked board array (used to save gas costs).
/// @param visited the array to update.
/// @param position the position on the board we want to flag.
/// @param flag the flag we want to set (either 1 or 2).
function setFlag(uint8[SHRINKED_BOARD_SIZE] visited, uint8 position, uint8 flag) private pure {
visited[position / 4] |= flag << ((position % 4) * 2);
}
/// @dev Internally used to check whether a flag in a shrinked board array is set.
/// @param visited the array to check.
/// @param position the position on the board we want to check.
/// @param flag the flag we want to check (either 1 or 2).
/// @return true if that flag is set, false otherwise.
function isFlagSet(uint8[SHRINKED_BOARD_SIZE] visited, uint8 position, uint8 flag) private pure returns (bool) {
return (visited[position / 4] & (flag << ((position % 4) * 2)) > 0);
}
// Get group visited flags
uint8 constant FLAG_POSITION_WAS_IN_STACK = 1;
uint8 constant FLAG_DID_VISIT_POSITION = 2;
/// @dev Gets a group starting from the position & color sent. In order for a stone to be part of the group,
/// it must match the original stone's color, and be connected to it - either directly, or through adjacent cells.
/// A group is captured if there aren't any empty cells around it.
/// The function supports both returning colored groups - white/black, and empty groups (for that case, isGroupCaptured isn't relevant).
/// @param board the board to check and update
/// @param position the position of the starting stone
/// @param positionColor the color of the starting stone (this param is sent to spare another reading op)
/// @return an array that contains the positions of the group,
/// a boolean that specifies whether the group is captured or not.
/// In order to save gas, if a group isn't captured, the array might not contain the enitre group.
function getGroup(GoBoard storage board, uint8 position, uint8 positionColor) private view returns (uint8[BOARD_SIZE], bool isGroupCaptured) {
// The return array, and its size
uint8[BOARD_SIZE] memory groupPositions;
uint8 groupSize = 0;
// Flagging visited locations
uint8[SHRINKED_BOARD_SIZE] memory visited;
// Stack of waiting positions, the first position to check is the sent position
uint8[BOARD_SIZE] memory stack;
stack[0] = position;
uint8 stackSize = 1;
// That position was added to the stack
setFlag(visited, position, FLAG_POSITION_WAS_IN_STACK);
// Run as long as there are positions in the stack
while (stackSize > 0) {
// Take the last position and clear it
position = stack[--stackSize];
stack[stackSize] = 0;
// Only if we didn't visit that stone before
if (!isFlagSet(visited, position, FLAG_DID_VISIT_POSITION)) {
// Set the flag so we won't visit it again
setFlag(visited, position, FLAG_DID_VISIT_POSITION);
// Add that position to the return value
groupPositions[groupSize++] = position;
// Get that position adjacent cells
uint8[MAX_ADJACENT_CELLS] memory adjacentArray = getAdjacentCells(position);
// Run over the adjacent cells
for (uint8 currAdjacentIndex = 0; currAdjacentIndex < MAX_ADJACENT_CELLS && adjacentArray[currAdjacentIndex] < MAX_UINT8; currAdjacentIndex++) {
// Get the current adjacent cell color
uint8 currColor = board.positionToColor[adjacentArray[currAdjacentIndex]];
// If it's the same color as the original position color
if (currColor == positionColor) {
// Add that position to the stack
if (!isFlagSet(visited, adjacentArray[currAdjacentIndex], FLAG_POSITION_WAS_IN_STACK)) {
stack[stackSize++] = adjacentArray[currAdjacentIndex];
setFlag(visited, adjacentArray[currAdjacentIndex], FLAG_POSITION_WAS_IN_STACK);
}
// If that position is empty, the group isn't captured, no need to continue running
} else if (currColor == 0) {
return (groupPositions, false);
}
}
}
}
// Flag the end of the group array only if needed
if (groupSize < BOARD_SIZE) {
groupPositions[groupSize] = MAX_UINT8;
}
// The group is captured, return it
return (groupPositions, true);
}
/// The max number of adjacent cells is 4
uint8 constant MAX_ADJACENT_CELLS = 4;
/// @dev returns the adjacent positions for a given position.
/// @param position to get its adjacents.
/// @return the adjacent positions array, filled with MAX_INT8 in case there aren't 4 adjacent positions.
function getAdjacentCells(uint8 position) private pure returns (uint8[MAX_ADJACENT_CELLS]) {
// Init the return array and current index
uint8[MAX_ADJACENT_CELLS] memory returnCells = [MAX_UINT8, MAX_UINT8, MAX_UINT8, MAX_UINT8];
uint8 adjacentCellsIndex = 0;
// Set the up position, if relevant
if (position / BOARD_ROW_SIZE > 0) {
returnCells[adjacentCellsIndex++] = position - BOARD_ROW_SIZE;
}
// Set the down position, if relevant
if (position / BOARD_ROW_SIZE < BOARD_ROW_SIZE - 1) {
returnCells[adjacentCellsIndex++] = position + BOARD_ROW_SIZE;
}
// Set the left position, if relevant
if (position % BOARD_ROW_SIZE > 0) {
returnCells[adjacentCellsIndex++] = position - 1;
}
// Set the right position, if relevant
if (position % BOARD_ROW_SIZE < BOARD_ROW_SIZE - 1) {
returnCells[adjacentCellsIndex++] = position + 1;
}
return returnCells;
}
/// @notice Calculates the board's score, using area scoring.
/// @param boardId the board to calculate the score for.
/// @return blackScore & whiteScore, the players' scores.
function calculateBoardScore(uint boardId) public view returns (uint8 blackScore, uint8 whiteScore) {
GoBoard storage board = allBoards[boardId];
uint8[BOARD_SIZE] memory boardEmptyGroups;
uint8 maxEmptyGroupId;
(boardEmptyGroups, maxEmptyGroupId) = getBoardEmptyGroups(board);
uint8[BOARD_SIZE] memory groupsSize;
uint8[BOARD_SIZE] memory groupsState;
blackScore = 0;
whiteScore = 0;
// Count stones and find empty territories
for (uint8 position = 0; position < BOARD_SIZE; position++) {
if (PlayerColor(board.positionToColor[position]) == PlayerColor.Black) {
blackScore++;
} else if (PlayerColor(board.positionToColor[position]) == PlayerColor.White) {
whiteScore++;
} else {
uint8 groupId = boardEmptyGroups[position];
groupsSize[groupId]++;
// Checking is needed only if we didn't find the group is adjacent to the two colors already
if ((groupsState[groupId] & uint8(PlayerColor.Black) == 0) || (groupsState[groupId] & uint8(PlayerColor.White) == 0)) {
uint8[MAX_ADJACENT_CELLS] memory adjacentArray = getAdjacentCells(position);
// Check adjacent cells to mark the group's bounderies
for (uint8 currAdjacentIndex = 0; currAdjacentIndex < MAX_ADJACENT_CELLS && adjacentArray[currAdjacentIndex] < MAX_UINT8; currAdjacentIndex++) {
// Check if the group has a black boundry
if ((PlayerColor(board.positionToColor[adjacentArray[currAdjacentIndex]]) == PlayerColor.Black) &&
(groupsState[groupId] & uint8(PlayerColor.Black) == 0)) {
groupsState[groupId] |= uint8(PlayerColor.Black);
// Check if the group has a white boundry
} else if ((PlayerColor(board.positionToColor[adjacentArray[currAdjacentIndex]]) == PlayerColor.White) &&
(groupsState[groupId] & uint8(PlayerColor.White) == 0)) {
groupsState[groupId] |= uint8(PlayerColor.White);
}
}
}
}
}
// Add territories size to the relevant player
for (uint8 currGroupId = 1; currGroupId < maxEmptyGroupId; currGroupId++) {
// Check if it's a black territory
if ((groupsState[currGroupId] & uint8(PlayerColor.Black) > 0) &&
(groupsState[currGroupId] & uint8(PlayerColor.White) == 0)) {
blackScore += groupsSize[currGroupId];
// Check if it's a white territory
} else if ((groupsState[currGroupId] & uint8(PlayerColor.White) > 0) &&
(groupsState[currGroupId] & uint8(PlayerColor.Black) == 0)) {
whiteScore += groupsSize[currGroupId];
}
}
return (blackScore, whiteScore);
}
/// @dev IDs empty groups on the board.
/// @param board the board to map.
/// @return an array that contains the mapped empty group ids, and the max empty group id
function getBoardEmptyGroups(GoBoard storage board) private view returns (uint8[BOARD_SIZE], uint8) {
uint8[BOARD_SIZE] memory boardEmptyGroups;
uint8 nextGroupId = 1;
for (uint8 position = 0; position < BOARD_SIZE; position++) {
PlayerColor currPositionColor = PlayerColor(board.positionToColor[position]);
if ((currPositionColor == PlayerColor.None) && (boardEmptyGroups[position] == 0)) {
uint8[BOARD_SIZE] memory emptyGroup;
bool isGroupCaptured;
(emptyGroup, isGroupCaptured) = getGroup(board, position, 0);
for (uint8 currGroupIndex = 0; currGroupIndex < BOARD_SIZE && emptyGroup[currGroupIndex] < MAX_UINT8; currGroupIndex++) {
boardEmptyGroups[emptyGroup[currGroupIndex]] = nextGroupId;
}
nextGroupId++;
}
}
return (boardEmptyGroups, nextGroupId);
}
}
|
@dev Calcultes whether a position captures an enemy group, or whether it's a suicide. Updates the board accoridngly (clears captured groups, or the suiciding stone). @param board the board to check and update @param position the position of the new stone @param positionColor the color of the new stone (this param is sent to spare another reading op) Group positions, used later Is group captured, or free In order to save gas, we check suicide only if the position is fully surrounded and doesn't capture enemy groups Get the position's adjacent cells Run as long as there an adjacent cell, or until we reach the end of the array Get the adjacent cell's color If the enemy's color Get the group's info Captured a group Clear the group from the board Detect suicide if needed Get the new stone's surrounding group If the group is captured, it's a suicide move, remove it Clear added stone
|
function updateCaptures(GoBoard storage board, uint8 position, uint8 positionColor) private {
uint8[BOARD_SIZE] memory group;
bool isGroupCaptured;
bool shouldCheckSuicide = true;
uint8[MAX_ADJACENT_CELLS] memory adjacentArray = getAdjacentCells(position);
for (uint8 currAdjacentIndex = 0; currAdjacentIndex < MAX_ADJACENT_CELLS && adjacentArray[currAdjacentIndex] < MAX_UINT8; currAdjacentIndex++) {
uint8 currColor = board.positionToColor[adjacentArray[currAdjacentIndex]];
if (currColor != 0 && currColor != positionColor) {
(group, isGroupCaptured) = getGroup(board, adjacentArray[currAdjacentIndex], currColor);
if (isGroupCaptured) {
for (uint8 currGroupIndex = 0; currGroupIndex < BOARD_SIZE && group[currGroupIndex] < MAX_UINT8; currGroupIndex++) {
board.positionToColor[group[currGroupIndex]] = 0;
}
}
}
}
if (shouldCheckSuicide) {
(group, isGroupCaptured) = getGroup(board, position, positionColor);
if (isGroupCaptured) {
board.positionToColor[position] = 0;
}
}
}
| 941,565
|
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./full_match/4/0x5B39bC9BbE7174718ca696BdE5AEB22B4Dd338B2/sources/browser/github/project/ChainlinkCNYUSDPriceConsumer.sol
|
(,int ethusdprice,,,) = priceFeed.latestRoundData();
|
function setPrice(uint256 _price,uint _cny2usd,uint256 _timestamp) public onlyOperator{
currRoundId++;
roundInfo[currRoundId].timestamp = _timestamp;
roundInfo[currRoundId].cny2usd = _cny2usd;
}
| 704,626
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'PhoneCoin' CROWDSALE token contract
//
// Deployed to : 0xf16cd2CF1d67713FfFDeF3AE395A18bef48332CF
// Symbol : PHONE
// Name : PhoneCoin
// Total supply: 100M
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto & Daniel Bar with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) internal 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 PhoneCoin is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
uint public startDate;
uint public bonusEnds;
uint public endDate;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function PhoneCoin() public {
symbol = "PHONE";
name = "PhoneCoin";
decimals = 18;
bonusEnds = now + 6 weeks;
endDate = now + 12 weeks;
_totalSupply = 100000000000000000000000000;
balances[0xf16cd2CF1d67713FfFDeF3AE395A18bef48332CF] = _totalSupply;
Transfer(address(0), 0xf16cd2CF1d67713FfFDeF3AE395A18bef48332CF, _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;
}
// ------------------------------------------------------------------------
// 10,000 PHONE Tokens per 1 ETH
// ------------------------------------------------------------------------
function () public payable {
require(now >= startDate && now <= endDate);
uint tokens;
if (now <= bonusEnds) {
tokens = msg.value * 12000;
} else {
tokens = msg.value * 10000;
}
balances[msg.sender] = safeAdd(balances[msg.sender], tokens);
_totalSupply = safeAdd(_totalSupply, tokens);
Transfer(address(0), msg.sender, tokens);
owner.transfer(msg.value);
}
function drain() external onlyOwner {
owner.transfer(this.balance);
}
// ------------------------------------------------------------------------
// 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 PhoneCoin is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
uint public startDate;
uint public bonusEnds;
uint public endDate;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
function PhoneCoin() public {
symbol = "PHONE";
name = "PhoneCoin";
decimals = 18;
bonusEnds = now + 6 weeks;
endDate = now + 12 weeks;
_totalSupply = 100000000000000000000000000;
balances[0xf16cd2CF1d67713FfFDeF3AE395A18bef48332CF] = _totalSupply;
Transfer(address(0), 0xf16cd2CF1d67713FfFDeF3AE395A18bef48332CF, _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 {
require(now >= startDate && now <= endDate);
uint tokens;
if (now <= bonusEnds) {
tokens = msg.value * 12000;
tokens = msg.value * 10000;
}
balances[msg.sender] = safeAdd(balances[msg.sender], tokens);
_totalSupply = safeAdd(_totalSupply, tokens);
Transfer(address(0), msg.sender, tokens);
owner.transfer(msg.value);
}
function () public payable {
require(now >= startDate && now <= endDate);
uint tokens;
if (now <= bonusEnds) {
tokens = msg.value * 12000;
tokens = msg.value * 10000;
}
balances[msg.sender] = safeAdd(balances[msg.sender], tokens);
_totalSupply = safeAdd(_totalSupply, tokens);
Transfer(address(0), msg.sender, tokens);
owner.transfer(msg.value);
}
} else {
function drain() external onlyOwner {
owner.transfer(this.balance);
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
| 14,428,092
|
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// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./interfaces/IVoteStaking.sol";
interface IStaking {
function userInfo(uint256 pid, address who) external view returns(uint256, uint256, uint256);
}
// VoteStaking is a small pool that provides extra staking reward, and should be called by Staking.
contract VoteStaking is Ownable, IVoteStaking {
using SafeMath for uint256;
uint256 constant PER_SHARE_SIZE = 1e12;
// Info of each user.
struct UserInfo {
uint256 amount; // How many tokens the user has provided.
uint256 rewardAmount;
uint256 rewardDebt; // Reward debt.
}
// Info of each user that stakes tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
// Info of the pool.
struct PoolInfo {
uint256 totalBalance;
uint256 rewardPerBlock;
uint256 startBlock;
uint256 endBlock;
uint256 lastRewardBlock;
uint256 accRewardPerShare; // Accumulated BLES per share, times PER_SHARE_SIZE.
}
// Info of the pool.
mapping(uint256 => PoolInfo) public poolInfo;
address public stakingAddress;
event Deposit(uint256 indexed pid, address indexed user, uint256 amount);
event Withdraw(uint256 indexed pid, address indexed user, uint256 amount);
event Claim(uint256 indexed pid, address indexed user, uint256 amount);
constructor(
address _stakingAddress
) public {
stakingAddress = _stakingAddress;
}
function changeStakingAddress(address _stakingAddress) external onlyOwner {
stakingAddress = _stakingAddress;
}
// Update the given pool's SUSHI allocation point. Can only be called by the owner.
function set(
uint256 _pid,
uint256 _rewardPerBlock,
uint256 _startBlock,
uint256 _endBlock,
bool _withUpdate
) external override {
require(msg.sender == stakingAddress, "Only staking address can call");
if (_withUpdate) {
updatePool(_pid);
}
poolInfo[_pid].rewardPerBlock = _rewardPerBlock;
poolInfo[_pid].startBlock = _startBlock;
poolInfo[_pid].endBlock = _endBlock;
}
// Return reward multiplier over the given _from to _to block.
function getReward(uint256 _pid, uint256 _from, uint256 _to)
public
view
returns (uint256)
{
if (_to <= _from || _from > poolInfo[_pid].endBlock || _to < poolInfo[_pid].startBlock) {
return 0;
}
uint256 startBlock = _from < poolInfo[_pid].startBlock ? poolInfo[_pid].startBlock : _from;
uint256 endBlock = _to < poolInfo[_pid].endBlock ? _to : poolInfo[_pid].endBlock;
return endBlock.sub(startBlock).mul(poolInfo[_pid].rewardPerBlock);
}
// View function to see pending BLES on frontend.
function pendingReward(uint256 _pid, address _user)
external
view
override
returns (uint256)
{
UserInfo storage user = userInfo[_pid][_user];
uint256 accRewardPerShare = poolInfo[_pid].accRewardPerShare;
if (block.number > poolInfo[_pid].lastRewardBlock && poolInfo[_pid].totalBalance > 0) {
uint256 reward = getReward(_pid, poolInfo[_pid].lastRewardBlock, block.number);
accRewardPerShare = accRewardPerShare.add(
reward.mul(PER_SHARE_SIZE).div(poolInfo[_pid].totalBalance)
);
}
return user.amount.mul(accRewardPerShare).div(
PER_SHARE_SIZE).sub(user.rewardDebt).add(user.rewardAmount);
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public override {
if (block.number <= poolInfo[_pid].lastRewardBlock) {
return;
}
if (poolInfo[_pid].totalBalance == 0) {
poolInfo[_pid].lastRewardBlock = block.number;
return;
}
uint256 reward = getReward(_pid, poolInfo[_pid].lastRewardBlock, block.number);
poolInfo[_pid].accRewardPerShare = poolInfo[_pid].accRewardPerShare.add(
reward.mul(PER_SHARE_SIZE).div(poolInfo[_pid].totalBalance)
);
poolInfo[_pid].lastRewardBlock = block.number;
}
// Deposit tokens for BLES allocation.
function deposit(uint256 _pid, address _who, uint256 _amount) external override {
require(msg.sender == stakingAddress, "Only staking address can call");
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_who];
(uint256 stakingAmount,,) = IStaking(stakingAddress).userInfo(_pid, _who);
require(stakingAmount >= user.amount.add(_amount), "Not enough staking amount");
updatePool(_pid);
if (user.amount > 0) {
uint256 pending =
user.amount.mul(pool.accRewardPerShare).div(PER_SHARE_SIZE).sub(
user.rewardDebt
);
user.rewardAmount = user.rewardAmount.add(pending);
}
pool.totalBalance = pool.totalBalance.add(_amount);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accRewardPerShare).div(PER_SHARE_SIZE);
emit Deposit(_pid, _who, _amount);
}
// Withdraw all tokens.
function withdraw(uint256 _pid, address _who) external override returns(uint256) {
require(msg.sender == stakingAddress, "Only staking address can call");
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_who];
uint256 userAmount = user.amount;
if (userAmount == 0) {
return 0;
}
updatePool(_pid);
uint256 pending = userAmount.mul(pool.accRewardPerShare).div(
PER_SHARE_SIZE).sub(user.rewardDebt);
user.rewardAmount = user.rewardAmount.add(pending);
user.amount = 0;
user.rewardDebt = 0;
pool.totalBalance = pool.totalBalance.sub(userAmount);
emit Withdraw(_pid, _who, userAmount);
return userAmount;
}
// claim all reward.
function claim(uint256 _pid, address _who) external override returns(uint256) {
require(msg.sender == stakingAddress, "Only staking address can call");
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_who];
updatePool(_pid);
uint256 pending = user.amount.mul(pool.accRewardPerShare).div(
PER_SHARE_SIZE).sub(user.rewardDebt);
uint256 rewardTotal = user.rewardAmount.add(pending);
user.rewardAmount = 0;
user.rewardDebt = user.amount.mul(pool.accRewardPerShare).div(PER_SHARE_SIZE);
emit Claim(_pid, _who, rewardTotal);
return rewardTotal;
}
function getUserStakedAmount(uint256 _pid, address _who) external override view returns(uint256) {
UserInfo storage user = userInfo[_pid][_who];
return user.amount;
}
}
|
View function to see pending BLES on frontend.
|
function pendingReward(uint256 _pid, address _user)
external
view
override
returns (uint256)
{
UserInfo storage user = userInfo[_pid][_user];
uint256 accRewardPerShare = poolInfo[_pid].accRewardPerShare;
if (block.number > poolInfo[_pid].lastRewardBlock && poolInfo[_pid].totalBalance > 0) {
uint256 reward = getReward(_pid, poolInfo[_pid].lastRewardBlock, block.number);
accRewardPerShare = accRewardPerShare.add(
reward.mul(PER_SHARE_SIZE).div(poolInfo[_pid].totalBalance)
);
}
return user.amount.mul(accRewardPerShare).div(
PER_SHARE_SIZE).sub(user.rewardDebt).add(user.rewardAmount);
}
| 5,425,480
|
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./full_match/80001/0x64Aa500f7aa45b20DfA59F41A50baDfd92316c08/sources/_thirdweb-dev/contracts/extension/plugin/PermissionsLogic.sol
|
* @notice Returns the admin role that controls the specified role. @dev See {grantRole} and {revokeRole}. To change a role's admin, use {_setRoleAdmin}. @param role keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")/
|
function getRoleAdmin(bytes32 role) external view override returns (bytes32) {
PermissionsStorage.Data storage data = PermissionsStorage.permissionsStorage();
return data._getRoleAdmin[role];
}
| 854,466
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pragma solidity ^0.4.17;
/**
* @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;
}
}
/**
* @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;
}
}
contract SimpleTGE is Ownable {
using SafeMath for uint256;
// start and end timestamps (both inclusive) when sale is open
uint256 public publicTGEStartBlockTimeStamp;
uint256 public publicTGEEndBlockTimeStamp;
// address where funds are collected
address public fundsWallet;
// amount of raised money in wei
uint256 public weiRaised;
// sale cap in wei
uint256 public totalCapInWei;
// individual cap in wei
uint256 public individualCapInWei;
// how long the TRS subscription is open after the TGE.
uint256 public TRSOffset = 5 days;
mapping (address => bool) public whitelist;
address[] public contributors;
struct Contribution {
bool hasVested;
uint256 weiContributed;
}
mapping (address => Contribution) public contributions;
modifier whilePublicTGEIsActive() {
require(block.timestamp >= publicTGEStartBlockTimeStamp && block.timestamp <= publicTGEEndBlockTimeStamp);
_;
}
modifier isWhitelisted() {
require(whitelist[msg.sender]);
_;
}
function blacklistAddresses(address[] addrs) external onlyOwner returns(bool) {
require(addrs.length <= 100);
for (uint i = 0; i < addrs.length; i++) {
require(addrs[i] != address(0));
whitelist[addrs[i]] = false;
}
return true;
}
function whitelistAddresses(address[] addrs) external onlyOwner returns(bool) {
require(addrs.length <= 100);
for (uint i = 0; i < addrs.length; i++) {
require(addrs[i] != address(0));
whitelist[addrs[i]] = true;
}
return true;
}
/**
* @dev Transfer all Ether held by the contract to the address specified by owner.
*/
function reclaimEther(address _beneficiary) external onlyOwner {
_beneficiary.transfer(this.balance);
}
function SimpleTGE (
address _fundsWallet,
uint256 _publicTGEStartBlockTimeStamp,
uint256 _publicTGEEndBlockTimeStamp,
uint256 _individualCapInWei,
uint256 _totalCapInWei
) public
{
require(_publicTGEStartBlockTimeStamp >= block.timestamp);
require(_publicTGEEndBlockTimeStamp > _publicTGEStartBlockTimeStamp);
require(_fundsWallet != address(0));
require(_individualCapInWei > 0);
require(_individualCapInWei <= _totalCapInWei);
require(_totalCapInWei > 0);
fundsWallet = _fundsWallet;
publicTGEStartBlockTimeStamp = _publicTGEStartBlockTimeStamp;
publicTGEEndBlockTimeStamp = _publicTGEEndBlockTimeStamp;
individualCapInWei = _individualCapInWei;
totalCapInWei = _totalCapInWei;
}
// allows changing the individual cap.
function changeIndividualCapInWei(uint256 _individualCapInWei) onlyOwner external returns(bool) {
require(_individualCapInWei > 0);
require(_individualCapInWei < totalCapInWei);
individualCapInWei = _individualCapInWei;
return true;
}
// low level token purchase function
function contribute(bool _vestingDecision) internal {
// validations
require(msg.sender != address(0));
require(msg.value != 0);
require(weiRaised.add(msg.value) <= totalCapInWei);
require(contributions[msg.sender].weiContributed.add(msg.value) <= individualCapInWei);
// if we have not received any WEI from this address until now, then we add this address to contributors list.
if (contributions[msg.sender].weiContributed == 0) {
contributors.push(msg.sender);
}
contributions[msg.sender].weiContributed = contributions[msg.sender].weiContributed.add(msg.value);
weiRaised = weiRaised.add(msg.value);
contributions[msg.sender].hasVested = _vestingDecision;
fundsWallet.transfer(msg.value);
}
function contributeAndVest() external whilePublicTGEIsActive isWhitelisted payable {
contribute(true);
}
function contributeWithoutVesting() public whilePublicTGEIsActive isWhitelisted payable {
contribute(false);
}
// fallback function can be used to buy tokens
function () external payable {
contributeWithoutVesting();
}
// Vesting logic
// The following cases are checked for _beneficiary's actions:
function vest(bool _vestingDecision) external isWhitelisted returns(bool) {
bool existingDecision = contributions[msg.sender].hasVested;
require(existingDecision != _vestingDecision);
require(block.timestamp >= publicTGEStartBlockTimeStamp);
require(contributions[msg.sender].weiContributed > 0);
// Ensure vesting cannot be done once TRS starts
if (block.timestamp > publicTGEEndBlockTimeStamp) {
require(block.timestamp.sub(publicTGEEndBlockTimeStamp) <= TRSOffset);
}
contributions[msg.sender].hasVested = _vestingDecision;
return true;
}
}
|
Vesting logic The following cases are checked for _beneficiary's actions: Ensure vesting cannot be done once TRS starts
|
function vest(bool _vestingDecision) external isWhitelisted returns(bool) {
bool existingDecision = contributions[msg.sender].hasVested;
require(existingDecision != _vestingDecision);
require(block.timestamp >= publicTGEStartBlockTimeStamp);
require(contributions[msg.sender].weiContributed > 0);
if (block.timestamp > publicTGEEndBlockTimeStamp) {
require(block.timestamp.sub(publicTGEEndBlockTimeStamp) <= TRSOffset);
}
contributions[msg.sender].hasVested = _vestingDecision;
return true;
}
| 972,714
|
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./full_match/80001/0xEA0671B9d3183dBb54F47B70a7004A77dd9b68a9/sources/project_/contracts/SwapFactory.sol
|
for sell token0 We are charging a fee of `1%` Input amount with fee = (input amount - (1*(input amount)/100)) = ((input amount)*99)/100
|
function getAmountOfTokens(
uint256 inputAmount,
uint256 inputReserve,
uint256 outputReserve
) public pure returns (uint256) {
uint256 inputAmountWithFee = inputAmount * 97;
uint256 numerator = inputAmountWithFee * outputReserve;
uint256 denominator = (inputReserve * 100) + inputAmountWithFee;
return numerator / denominator;
}
| 5,621,632
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pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
/**
* @title Cell
*/
contract Cell is ERC721Enumerable, Ownable {
string private _baseTokenURI;
// Mapping from token ID to 10x10 cell image
mapping (uint256 => bytes) private _image;
// Mapping from token ID to image url
mapping (uint256 => string) private _url;
// Cell token count
uint256 private _cellCount;
// The sale contract address
address private _minterContract;
/**
* Event for token change image logging
* @param tokenId uint256 ID of the token to be change image
* @param image byte code that represents the image of a 10 x 10 pixel
* @param url link of image
*/
event SetImage(uint256 tokenId, bytes image, string url);
constructor (string memory name, string memory symbol, uint256 cellCount) ERC721(name, symbol) {
_cellCount = cellCount;
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function setBaseURI(string calldata newBaseTokenURI) public onlyOwner{
_baseTokenURI = newBaseTokenURI;
}
function baseURI() public view returns (string memory) {
return _baseURI();
}
function exists(uint256 tokenId) public view returns (bool) {
return _exists(tokenId);
}
function setImage(uint256 tokenId, bytes memory image, string memory url) public {
require(_isApprovedOrOwner(_msgSender(), tokenId), "Cell: caller is not owner nor approved");
_image[tokenId] = image;
_url[tokenId] = url;
emit SetImage(tokenId, image, url);
}
function setBatchImage(uint256[] memory tokenIds, bytes[] memory images, string memory url) public {
require(tokenIds.length == images.length, "Cell: tokenIds and images must have the same length");
for (uint256 i = 0; i < tokenIds.length; ++i) {
setImage(tokenIds[i], images[i], url);
}
}
function getImage(uint256 tokenId) public view returns (bytes memory) {
require(tokenId < getCellCount(), "Cell: tokenId must be less than cell count");
return _image[tokenId];
}
function getUrl(uint256 tokenId) public view returns (string memory) {
require(tokenId < getCellCount(), "Cell: tokenId must be less than cell count");
return _url[tokenId];
}
function getMinterAddrass() public view returns (address) {
return _minterContract;
}
function setMinterAddrass(address minterContract) public onlyOwner {
_minterContract = minterContract;
}
function getCellCount() public view returns (uint256) {
return _cellCount;
}
function mint(address to, uint256 tokenId) public {
_mint(to, tokenId);
}
function safeMint(address to, uint256 tokenId) public {
_safeMint(to, tokenId);
}
function safeMint(address to, uint256 tokenId, bytes memory _data) public {
_safeMint(to, tokenId, _data);
}
function batchMint(address to,uint256[] memory tokenIds) public {
for (uint256 i = 0; i < tokenIds.length; ++i) {
_mint(to, tokenIds[i]);
}
}
function batchTransfer(address from, address to,uint256[] memory tokenIds) public {
for (uint256 i = 0; i < tokenIds.length; ++i) {
_transfer(from, to, tokenIds[i]);
}
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override{
require(tokenId < getCellCount(), "Cell: tokenId must be less than cell count");
require(from != address(0) || _msgSender() == _minterContract, "Cell: only the sale contract can be mint a new token");
super._beforeTokenTransfer(from, to, tokenId);
}
}
// 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/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "./extensions/IERC721Enumerable.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}. 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 || ERC721.isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _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 || ERC721.isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
d*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_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(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
// 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;
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;
/**
* @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;
/**
* @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);
}
|
* Event for token change image logging @param tokenId uint256 ID of the token to be change image @param image byte code that represents the image of a 10 x 10 pixel @param url link of image/
|
constructor (string memory name, string memory symbol, uint256 cellCount) ERC721(name, symbol) {
_cellCount = cellCount;
}
| 1,256,559
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/*
Copyright 2019 Set Labs 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.
*/
pragma solidity 0.5.7;
import { SafeMath } from "openzeppelin-solidity/contracts/math/SafeMath.sol";
/**
* @title SetMath
* @author Set Protocol
*/
library SetMath {
using SafeMath for uint256;
/**
* Converts SetToken quantity to component quantity
*/
function setToComponent(
uint256 _setQuantity,
uint256 _componentUnit,
uint256 _naturalUnit
)
internal
pure
returns(uint256)
{
return _setQuantity.mul(_componentUnit).div(_naturalUnit);
}
/**
* Converts component quantity to Set quantity
*/
function componentToSet(
uint256 _componentQuantity,
uint256 _componentUnit,
uint256 _naturalUnit
)
internal
pure
returns(uint256)
{
return _componentQuantity.mul(_naturalUnit).div(_componentUnit);
}
}
|
* Converts component quantity to Set quantity/
|
function componentToSet(
uint256 _componentQuantity,
uint256 _componentUnit,
uint256 _naturalUnit
)
internal
pure
returns(uint256)
{
return _componentQuantity.mul(_naturalUnit).div(_componentUnit);
}
| 7,319,335
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] |
pragma solidity ^0.4.21;
import "zeppelin-solidity/contracts/lifecycle/Pausable.sol";
import "zeppelin-solidity/contracts/math/SafeMath.sol";
import "zeppelin-solidity/contracts/token/ERC20/SafeERC20.sol";
import "./ArbiterStaking.sol";
import "./NectarToken.sol";
contract BountyRegistry is Pausable {
using SafeMath for uint256;
using SafeERC20 for NectarToken;
struct Bounty {
uint128 guid;
address author;
uint256 amount;
string artifactURI;
uint256 numArtifacts;
uint256 expirationBlock;
address assignedArbiter;
uint256[8] bloom;
address[] voters;
uint256[] verdicts;
bool[] bloomVotes;
}
struct Assertion {
address author;
uint256 bid;
uint256 mask;
uint256 commitment;
uint256 nonce;
uint256 verdicts;
string metadata;
}
event AddedArbiter(
address arbiter,
uint256 blockNumber
);
event RemovedArbiter(
address arbiter,
uint256 blockNumber
);
event NewBounty(
uint128 guid,
address author,
uint256 amount,
string artifactURI,
uint256 expirationBlock
);
event NewAssertion(
uint128 bountyGuid,
address author,
uint256 index,
uint256 bid,
uint256 mask,
uint256 commitment
);
event RevealedAssertion(
uint128 bountyGuid,
address author,
uint256 index,
uint256 nonce,
uint256 verdicts,
string metadata
);
event NewVerdict(
uint128 bountyGuid,
uint256 verdicts
);
ArbiterStaking public staking;
NectarToken internal token;
// 0.0625NCT (1/16)
uint256 public constant BOUNTY_FEE = 62500000000000000;
uint256 public constant ASSERTION_FEE = 62500000000000000;
uint256 public constant BOUNTY_AMOUNT_MINIMUM = 62500000000000000;
uint256 public constant ASSERTION_BID_MINIMUM = 62500000000000000;
uint256 public constant ARBITER_LOOKBACK_RANGE = 100;
uint256 public constant ARBITER_VOTE_WINDOW = 25; // BLOCKS
uint256 public constant ASSERTION_REVEAL_WINDOW = 25; // BLOCKS
// ~4 months in blocks
uint256 public constant STAKE_DURATION = 701333;
uint128[] public bountyGuids;
mapping (uint128 => Bounty) public bountiesByGuid;
mapping (uint128 => Assertion[]) public assertionsByGuid;
mapping (address => bool) public arbiters;
mapping (uint256 => mapping (uint256 => uint256)) public verdictCountByGuid;
mapping (uint256 => mapping (address => bool)) public arbiterVoteResgistryByGuid;
mapping (uint128 => mapping (address => bool)) public bountySettled;
/**
* Construct a new BountyRegistry
*
* @param _token address of NCT token to use
*/
constructor(address _token) Ownable() public {
owner = msg.sender;
staking = new ArbiterStaking(_token, STAKE_DURATION);
token = NectarToken(_token);
}
/**
* Function to check if an address is a valid arbiter
*
* @param addr The address to check
* @return true if addr is a valid arbiter else false
*/
function isArbiter(address addr) public view returns (bool) {
return arbiters[addr] && staking.isEligible(addr);
}
/** Function only callable by arbiter */
modifier onlyArbiter() {
require(isArbiter(msg.sender));
_;
}
/**
* Function called to add an arbiter, emits an evevnt with the added arbiter
* and block number used to calculate their arbiter status based on public
* arbiter selection algorithm.
*
* @param newArbiter the arbiter to add
* @param blockNumber the block number the determination to add was
* calculated from
*/
function addArbiter(address newArbiter, uint256 blockNumber) external whenNotPaused onlyOwner {
require(newArbiter != address(0));
require(!arbiters[newArbiter]);
arbiters[newArbiter] = true;
emit AddedArbiter(newArbiter, blockNumber);
}
/**
* Function called to remove an arbiter, emits an evevnt with the removed
* arbiter and block number used to calculate their arbiter status based on
* public arbiter selection algorithm.
*
* @param arbiter the arbiter to remove
* @param blockNumber the block number the determination to remove was
* calculated from
*/
function removeArbiter(address arbiter, uint256 blockNumber) external whenNotPaused onlyOwner {
arbiters[arbiter] = false;
emit RemovedArbiter(arbiter, blockNumber);
}
/**
* Function called by end users and ambassadors to post a bounty
*
* @param guid the guid of the bounty, must be unique
* @param amount the amount of NCT to post as a reward
* @param artifactURI uri of the artifacts comprising this bounty
* @param durationBlocks duration of this bounty in blocks
*/
function postBounty(
uint128 guid,
uint256 amount,
string artifactURI,
uint256 numArtifacts,
uint256 durationBlocks,
uint256[8] bloom
)
external
whenNotPaused
{
// Check if a bounty with this GUID has already been initialized
require(bountiesByGuid[guid].author == address(0));
// Check that our bounty amount is sufficient
require(amount >= BOUNTY_AMOUNT_MINIMUM);
// Check that our URI is non-empty
require(bytes(artifactURI).length > 0);
// Check that our number of artifacts is valid
require(numArtifacts <= 256);
// Check that our duration is non-zero
require(durationBlocks > 0);
// Assess fees and transfer bounty amount into escrow
token.safeTransferFrom(msg.sender, address(this), amount.add(BOUNTY_FEE));
bountiesByGuid[guid].guid = guid;
bountiesByGuid[guid].author = msg.sender;
bountiesByGuid[guid].amount = amount;
bountiesByGuid[guid].artifactURI = artifactURI;
// FIXME
bountiesByGuid[guid].numArtifacts = numArtifacts;
bountiesByGuid[guid].expirationBlock = durationBlocks.add(block.number);
bountiesByGuid[guid].bloom = bloom;
bountyGuids.push(guid);
emit NewBounty(
bountiesByGuid[guid].guid,
bountiesByGuid[guid].author,
bountiesByGuid[guid].amount,
bountiesByGuid[guid].artifactURI,
bountiesByGuid[guid].expirationBlock
);
}
/**
* Function called by security experts to post an assertion on a bounty
*
* @param bountyGuid the guid of the bounty to assert on
* @param bid the amount of NCT to stake
* @param mask the artifacts to assert on from the set in the bounty
* @param commitment a commitment hash of the verdicts being asserted, equal
* to keccak256(verdicts ^ keccak256(nonce)) where nonce != 0
*/
function postAssertion(
uint128 bountyGuid,
uint256 bid,
uint256 mask,
uint256 commitment
)
external
whenNotPaused
{
// Check if this bounty has been initialized
require(bountiesByGuid[bountyGuid].author != address(0));
// Check that our bid amount is sufficient
require(bid >= ASSERTION_BID_MINIMUM);
// Check if this bounty is active
require(bountiesByGuid[bountyGuid].expirationBlock > block.number);
// Assess fees and transfer bid amount into escrow
token.safeTransferFrom(msg.sender, address(this), bid.add(ASSERTION_FEE));
Assertion memory a = Assertion(
msg.sender,
bid,
mask,
commitment,
0,
0,
""
);
uint256 index = assertionsByGuid[bountyGuid].push(a) - 1;
emit NewAssertion(
bountyGuid,
a.author,
index,
a.bid,
a.mask,
a.commitment
);
}
/**
* Function called by arbiter after bounty expiration to settle with their
* ground truth determination and pay out assertion rewards
*
* @param bountyGuid the guid of the bounty to settle
* @param verdicts bitset of verdicts representing ground truth for the
* bounty's artifacts
*/
function voteOnBounty(
uint128 bountyGuid,
uint256 verdicts,
bool validBloom
)
external
onlyArbiter
whenNotPaused
{
Bounty storage bounty = bountiesByGuid[bountyGuid];
// Check if this bounty has been initialized
require(bounty.author != address(0));
// Check that the bounty has closed
require(bounty.expirationBlock <= block.number);
// Check if the voting window has closed
require(bounty.expirationBlock.add(ARBITER_VOTE_WINDOW) > block.number);
// Check to make sure arbiters can't double vote
require(arbiterVoteResgistryByGuid[bountyGuid][msg.sender] == false);
bounty.verdicts.push(verdicts);
bounty.voters.push(msg.sender);
bounty.bloomVotes.push(validBloom);
staking.recordBounty(msg.sender, bountyGuid, block.number);
arbiterVoteResgistryByGuid[bountyGuid][msg.sender] = true;
emit NewVerdict(bountyGuid, verdicts);
}
// https://ethereum.stackexchange.com/questions/4170/how-to-convert-a-uint-to-bytes-in-solidity
function uint256_to_bytes(uint256 x) internal pure returns (bytes b) {
b = new bytes(32);
assembly { mstore(add(b, 32), x) }
}
/**
* Function called by security experts to reveal an assertion after bounty
* expiration
*
* @param bountyGuid the guid of the bounty to assert on
* @param assertionId the id of the assertion to reveal
* @param nonce the nonce used to generate the commitment hash
* @param verdicts the verdicts making up this assertion
* @param metadata optional metadata to include in the assertion
*/
function revealAssertion(
uint128 bountyGuid,
uint256 assertionId,
uint256 nonce,
uint256 verdicts,
string metadata
)
external
whenNotPaused
{
// Check if this bounty has been initialized
require(bountiesByGuid[bountyGuid].author != address(0));
// Check that the voting round has closed
require(bountiesByGuid[bountyGuid].expirationBlock.add(ARBITER_VOTE_WINDOW) <= block.number);
// Check if the reveal round has closed
require(bountiesByGuid[bountyGuid].expirationBlock.add(ARBITER_VOTE_WINDOW).add(ASSERTION_REVEAL_WINDOW) > block.number);
// Zero is defined as an invalid nonce
require(nonce != 0);
// Check our id
require(assertionId < assertionsByGuid[bountyGuid].length);
Assertion storage a = assertionsByGuid[bountyGuid][assertionId];
require(a.author == msg.sender);
require(a.nonce == 0);
// Check our commitment hash
uint256 hashed_nonce = uint256(keccak256(uint256_to_bytes(nonce)));
uint256 commitment = uint256(keccak256(uint256_to_bytes(verdicts ^ hashed_nonce)));
require(commitment == a.commitment);
a.nonce = nonce;
a.verdicts = verdicts;
a.metadata = metadata;
emit RevealedAssertion(
bountyGuid,
a.author,
assertionId,
a.nonce,
a.verdicts,
a.metadata
);
}
// This struct exists to move state from settleBounty into memory from stack
// to avoid solidity limitations
struct ArtifactPot {
uint256 numWinners;
uint256 numLosers;
uint256 winnerPool;
uint256 loserPool;
}
/**
* Function to calculate the reward disbursment of a bounty
*
* @param bountyGuid the guid of the bounty to calculate
* @return Rewards distributed by the bounty
*/
function calculateBountyRewards(
uint128 bountyGuid
)
public
view
returns (uint256 bountyRefund, uint256 arbiterReward, uint256[] expertRewards)
{
Bounty memory bounty = bountiesByGuid[bountyGuid];
Assertion[] memory assertions = assertionsByGuid[bountyGuid];
// Check if this bountiesByGuid[bountyGuid] has been initialized
require(bounty.author != address(0));
// Check if this bounty has been previously resolved for the sender
require(!bountySettled[bountyGuid][msg.sender]);
// Check that the voting round has closed
require(bounty.expirationBlock.add(ARBITER_VOTE_WINDOW).add(ASSERTION_REVEAL_WINDOW) <= block.number);
expertRewards = new uint256[](assertions.length);
uint256 i = 0;
uint256 j = 0;
if (assertions.length == 0) {
// Refund the bounty amount and fees to ambassador
bountyRefund = bounty.amount.add(BOUNTY_FEE).mul(bounty.numArtifacts);
} else if (bounty.verdicts.length == 0) {
// Refund bids and distribute the bounty amount evenly to experts
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
expertRewards[j] = expertRewards[j].add(bounty.amount.div(assertions.length));
}
} else {
for (i = 0; i < bounty.numArtifacts; i++) {
uint256 vote = 0;
for (j = 0; j < bounty.verdicts.length; j++) {
if (bounty.verdicts[j] & (1 << i) != 0) {
vote = vote.add(1);
}
}
// Three cases: 0: 0 <= T < 1/3, 1: 1/3 <= T < 2/3, 2: 2/3 <= T <= 1
vote = vote.mul(3).div(bounty.verdicts.length);
if (vote == 1) {
// failed to reach supermajority, refund expert bids and split
// bounty
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
expertRewards[j] = expertRewards[j].add(bounty.amount.div(assertions.length));
}
} else {
// Otherwise, arbiters agree
ArtifactPot memory ap;
bool consensus = vote != 0;
for (j = 0; j < assertions.length; j++) {
// If we haven't revealed or didn't assert on this artifact
if (assertions[j].nonce == 0 || assertions[j].mask & (1 << i) == 0) {
continue;
}
bool malicious = (assertions[j].verdicts & assertions[j].mask) & (1 << i) != 0;
if (malicious == consensus) {
ap.numWinners = ap.numWinners.add(1);
ap.winnerPool = ap.winnerPool.add(assertions[j].bid);
} else {
ap.numLosers = ap.numLosers.add(1);
ap.loserPool = ap.loserPool.add(assertions[j].bid);
}
}
// If nobody asserted on this artifact, refund the ambassador
if (ap.numWinners == 0 && ap.numLosers == 0) {
bountyRefund = bountyRefund.add(bounty.amount).add(BOUNTY_FEE);
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
}
} else {
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
// If we haven't revealed or didn't assert on this artifact
if (assertions[j].nonce == 0 || assertions[j].mask & (1 << i) == 0) {
continue;
}
malicious = (assertions[j].verdicts & assertions[j].mask) & (1 << i) != 0;
if (malicious == consensus) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid.mul(ap.loserPool).div(ap.winnerPool));
expertRewards[j] = expertRewards[j].add(bounty.amount.mul(ap.loserPool).div(ap.winnerPool));
} else {
expertRewards[j] = expertRewards[j].sub(assertions[j].bid);
}
}
}
}
}
}
// Calculate rewards
uint256 pot = bounty.amount.add(BOUNTY_FEE.add(ASSERTION_FEE.mul(assertions.length)));
for (i = 0; i < assertions.length; i++) {
pot = pot.add(assertions[i].bid);
}
bountyRefund = bountyRefund.div(bounty.numArtifacts);
pot = pot.sub(bountyRefund);
for (i = 0; i < assertions.length; i++) {
expertRewards[i] = expertRewards[i].div(bounty.numArtifacts);
pot = pot.sub(expertRewards[i]);
}
arbiterReward = pot;
}
/**
* Function called after window has closed to handle reward disbursal
*
* This function will pay out rewards if the the bounty has a super majority
* @param bountyGuid the guid of the bounty to settle
*/
function settleBounty(uint128 bountyGuid) external whenNotPaused {
Bounty storage bounty = bountiesByGuid[bountyGuid];
Assertion[] storage assertions = assertionsByGuid[bountyGuid];
// Check if this bountiesByGuid[bountyGuid] has been initialized
require(bounty.author != address(0));
// Check if this bounty has been previously resolved for the sender
require(!bountySettled[bountyGuid][msg.sender]);
// Check that the voting round has closed
require(bounty.expirationBlock.add(ARBITER_VOTE_WINDOW).add(ASSERTION_REVEAL_WINDOW) <= block.number);
if (bounty.assignedArbiter == address(0)) {
bounty.assignedArbiter = getWeightedRandomArbiter(bountyGuid);
}
uint256 bountyRefund;
uint256 arbiterReward;
uint256[] memory expertRewards;
(bountyRefund, arbiterReward, expertRewards) = calculateBountyRewards(bountyGuid);
bountySettled[bountyGuid][msg.sender] = true;
// Disburse rewards
if (bountyRefund != 0 && bounty.author == msg.sender) {
token.safeTransfer(bounty.author, bountyRefund);
}
for (uint256 i = 0; i < assertions.length; i++) {
if (expertRewards[i] != 0 && assertions[i].author == msg.sender) {
token.safeTransfer(assertions[i].author, expertRewards[i]);
}
}
if (arbiterReward != 0 && bounty.assignedArbiter == msg.sender) {
token.safeTransfer(bounty.assignedArbiter, arbiterReward);
}
}
/**
* Generates a random number from 0 to range based on the last block hash
*
* @param seed random number for reprocucing
* @param range end range for random number
*/
function randomGen(uint seed, uint256 range) constant private returns (int256 randomNumber) {
return int256(uint256(keccak256(abi.encodePacked(blockhash(block.number-1), seed))) % range);
}
/**
* Gets a random Arbiter weighted by the amount of Nectar they have
*
* @param bountyGuid the guid of the bounty
*/
function getWeightedRandomArbiter(uint128 bountyGuid) public view returns (address voter) {
require(bountiesByGuid[bountyGuid].author != address(0));
Bounty memory bounty = bountiesByGuid[bountyGuid];
uint i;
uint256 sum;
int256 randomNum;
for (i = 0; i < bounty.voters.length; i++) {
sum = sum.add(staking.balanceOf(bounty.voters[i]));
}
randomNum = randomGen(block.number, sum);
for (i = 0; i < bounty.voters.length; i++) {
randomNum -= int256(staking.balanceOf(bounty.voters[i]));
if (randomNum <= 0) {
voter = bounty.voters[i];
break;
}
}
}
/**
* Get the total number of bounties tracked by the contract
* @return total number of bounties
*/
function getNumberOfBounties() external view returns (uint) {
return bountyGuids.length;
}
/**
* Gets the number of assertions for a bounty
*
* @param bountyGuid the guid of the bounty
* @return number of assertions for the given bounty
*/
function getNumberOfAssertions(uint128 bountyGuid) external view returns (uint) {
// Check if this bounty has been initialized
require(bountiesByGuid[bountyGuid].author != address(0));
return assertionsByGuid[bountyGuid].length;
}
/**
* Gets the vote count for a specific bounty
*
* @param bountyGuid the guid of the bounty
*/
function getVerdictCount(uint128 bountyGuid) external view returns (uint) {
require(bountiesByGuid[bountyGuid].author != address(0));
return bountiesByGuid[bountyGuid].verdicts.length;
}
/**
* Gets all the voters for a specific bounty
*
* @param bountyGuid the guid of the bounty
*/
function getVoters(uint128 bountyGuid) external view returns (address[]) {
require(bountiesByGuid[bountyGuid].author != address(0));
uint count = bountiesByGuid[bountyGuid].voters.length;
address[] memory voters = new address[](count);
for (uint i = 0; i < count; i++) {
voters[i] = bountiesByGuid[bountyGuid].voters[i];
}
return voters;
}
/** Candidate for future arbiter */
struct Candidate {
address addr;
uint256 count;
}
/**
* View function displays most active bounty posters over past
* ARBITER_LOOKBACK_RANGE bounties to select future arbiters
*
* @return sorted array of most active bounty posters
*/
function getArbiterCandidates() external view returns (address[]) {
require(bountyGuids.length > 0);
uint256 count = 0;
Candidate[] memory candidates = new Candidate[](ARBITER_LOOKBACK_RANGE);
uint256 lastBounty = 0;
if (bountyGuids.length > ARBITER_LOOKBACK_RANGE) {
lastBounty = bountyGuids.length.sub(ARBITER_LOOKBACK_RANGE);
}
for (uint256 i = bountyGuids.length; i > lastBounty; i--) {
address addr = bountiesByGuid[bountyGuids[i.sub(1)]].author;
bool found = false;
for (uint256 j = 0; j < count; j++) {
if (candidates[j].addr == addr) {
candidates[j].count = candidates[j].count.add(1);
found = true;
break;
}
}
if (!found) {
candidates[count] = Candidate(addr, 1);
count = count.add(1);
}
}
address[] memory ret = new address[](count);
for (i = 0; i < ret.length; i++) {
uint256 next = 0;
uint256 value = candidates[0].count;
for (j = 0; j < count; j++) {
if (candidates[j].count > value) {
next = j;
value = candidates[j].count;
}
}
ret[i] = candidates[next].addr;
candidates[next] = candidates[count.sub(1)];
count = count.sub(1);
}
return ret;
}
}
|
* Function to calculate the reward disbursment of a bounty @param bountyGuid the guid of the bounty to calculate @return Rewards distributed by the bounty/ Check if this bountiesByGuid[bountyGuid] has been initialized Check if this bounty has been previously resolved for the sender Check that the voting round has closed Refund the bounty amount and fees to ambassador Refund bids and distribute the bounty amount evenly to experts failed to reach supermajority, refund expert bids and split bounty If we haven't revealed or didn't assert on this artifact If nobody asserted on this artifact, refund the ambassador If we haven't revealed or didn't assert on this artifact
|
function calculateBountyRewards(
uint128 bountyGuid
)
public
view
returns (uint256 bountyRefund, uint256 arbiterReward, uint256[] expertRewards)
{
Bounty memory bounty = bountiesByGuid[bountyGuid];
Assertion[] memory assertions = assertionsByGuid[bountyGuid];
require(bounty.author != address(0));
require(!bountySettled[bountyGuid][msg.sender]);
require(bounty.expirationBlock.add(ARBITER_VOTE_WINDOW).add(ASSERTION_REVEAL_WINDOW) <= block.number);
expertRewards = new uint256[](assertions.length);
uint256 i = 0;
uint256 j = 0;
if (assertions.length == 0) {
bountyRefund = bounty.amount.add(BOUNTY_FEE).mul(bounty.numArtifacts);
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
expertRewards[j] = expertRewards[j].add(bounty.amount.div(assertions.length));
}
for (i = 0; i < bounty.numArtifacts; i++) {
uint256 vote = 0;
for (j = 0; j < bounty.verdicts.length; j++) {
if (bounty.verdicts[j] & (1 << i) != 0) {
vote = vote.add(1);
}
}
if (vote == 1) {
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
expertRewards[j] = expertRewards[j].add(bounty.amount.div(assertions.length));
}
bool consensus = vote != 0;
for (j = 0; j < assertions.length; j++) {
if (assertions[j].nonce == 0 || assertions[j].mask & (1 << i) == 0) {
continue;
}
bool malicious = (assertions[j].verdicts & assertions[j].mask) & (1 << i) != 0;
if (malicious == consensus) {
ap.numWinners = ap.numWinners.add(1);
ap.winnerPool = ap.winnerPool.add(assertions[j].bid);
ap.numLosers = ap.numLosers.add(1);
ap.loserPool = ap.loserPool.add(assertions[j].bid);
}
}
if (ap.numWinners == 0 && ap.numLosers == 0) {
bountyRefund = bountyRefund.add(bounty.amount).add(BOUNTY_FEE);
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
}
for (j = 0; j < assertions.length; j++) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid);
if (assertions[j].nonce == 0 || assertions[j].mask & (1 << i) == 0) {
continue;
}
malicious = (assertions[j].verdicts & assertions[j].mask) & (1 << i) != 0;
if (malicious == consensus) {
expertRewards[j] = expertRewards[j].add(assertions[j].bid.mul(ap.loserPool).div(ap.winnerPool));
expertRewards[j] = expertRewards[j].add(bounty.amount.mul(ap.loserPool).div(ap.winnerPool));
expertRewards[j] = expertRewards[j].sub(assertions[j].bid);
}
}
}
}
}
}
for (i = 0; i < assertions.length; i++) {
pot = pot.add(assertions[i].bid);
}
bountyRefund = bountyRefund.div(bounty.numArtifacts);
pot = pot.sub(bountyRefund);
for (i = 0; i < assertions.length; i++) {
expertRewards[i] = expertRewards[i].div(bounty.numArtifacts);
pot = pot.sub(expertRewards[i]);
}
arbiterReward = pot;
}
| 13,128,718
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] |
pragma solidity ^0.4.24;
// produced by the Solididy File Flattener (c) David Appleton 2018
// contact : dave@akomba.com
// released under Apache 2.0 licence
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
contract ERC20 {
function totalSupply() public view returns (uint256);
function balanceOf(address _who) public view returns (uint256);
function allowance(address _owner, address _spender)
public view returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
function approve(address _spender, uint256 _value)
public returns (bool);
function transferFrom(address _from, address _to, uint256 _value)
public returns (bool);
function burn(uint256 _value)
public returns (bool);
event Transfer(
address indexed from,
address indexed to,
uint256 value
);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Burn(
address indexed burner,
uint256 value
);
}
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;
}
}
contract LoligoToken is ERC20, Ownable {
using SafeMath for uint256;
string public constant name = "Loligo Token";
string public constant symbol = "LLG";
uint8 public constant decimals = 18;
uint256 private totalSupply_ = 16000000 * (10 ** uint256(decimals));
bool public locked = true;
mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private allowed;
modifier onlyWhenUnlocked() {
require(!locked || msg.sender == owner);
_;
}
constructor() public {
balances[msg.sender] = totalSupply_;
}
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
/**
* @dev Transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public onlyWhenUnlocked returns (bool) {
require(_value <= balances[msg.sender]);
require(_to != address(0));
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @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
onlyWhenUnlocked
returns (bool)
{
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(_to != address(0));
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 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,
uint256 _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,
uint256 _subtractedValue
)
public
returns (bool)
{
uint256 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;
}
function burn(uint256 _value) public returns (bool success){
require(_value > 0);
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(burner, _value);
return true;
}
function unlock() public onlyOwner {
locked = false;
}
}
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() public onlyOwner whenNotPaused {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner whenPaused {
paused = false;
emit Unpause();
}
}
contract Whitelist is Ownable{
// Whitelisted address
mapping(address => bool) public whitelist;
// evants
event LogAddedBeneficiary(address indexed _beneficiary);
event LogRemovedBeneficiary(address indexed _beneficiary);
/**
* @dev Adds list of addresses to whitelist. Not overloaded due to limitations with truffle testing.
* @param _beneficiaries Addresses to be added to the whitelist
*/
function addManyToWhitelist(address[] _beneficiaries) public onlyOwner {
for (uint256 i = 0; i < _beneficiaries.length; i++) {
whitelist[_beneficiaries[i]] = true;
emit LogAddedBeneficiary(_beneficiaries[i]);
}
}
/**
* @dev Removes single address from whitelist.
* @param _beneficiary Address to be removed to the whitelist
*/
function removeFromWhitelist(address _beneficiary) public onlyOwner {
whitelist[_beneficiary] = false;
emit LogRemovedBeneficiary(_beneficiary);
}
function isWhitelisted(address _beneficiary) public view returns (bool) {
return (whitelist[_beneficiary]);
}
}
contract TokenBonus is Ownable {
using SafeMath for uint256;
address public owner;
mapping (address => uint256) public bonusBalances; // visible to the public or not ???
address[] public bonusList;
uint256 public savedBonusToken;
constructor() public {
owner = msg.sender;
}
function distributeBonusToken(address _token, uint256 _percent) public onlyOwner {
for (uint256 i = 0; i < bonusList.length; i++) {
require(LoligoToken(_token).balanceOf(address(this)) >= savedBonusToken);
uint256 amountToTransfer = bonusBalances[bonusList[i]].mul(_percent).div(100);
bonusBalances[bonusList[i]] = bonusBalances[bonusList[i]].sub(amountToTransfer);
savedBonusToken = savedBonusToken.sub(amountToTransfer);
LoligoToken(_token).transfer(bonusList[i], amountToTransfer);
}
}
}
contract Presale is Pausable, Whitelist, TokenBonus {
using SafeMath for uint256;
// addresse for testing to change
address private wallet = 0xE2a5B96B6C1280cfd93b57bcd3fDeAf73691D3f3; // ETH wallet
// LLG token
LoligoToken public token;
// Presale period
uint256 public presaleRate; // Rate presale LLG token per ether
uint256 public totalTokensForPresale; // LLG tokens allocated for the Presale
bool public presale1; // Presale first period
bool public presale2; // Presale second period
// presale params
uint256 public savedBalance; // Total amount raised in ETH
uint256 public savedPresaleTokenBalance; // Total sold tokens for presale
mapping (address => uint256) balances; // Balances in incoming Ether
// Events
event Contribution(address indexed _contributor, uint256 indexed _value, uint256 indexed _tokens); // Event to record new contributions
event PayEther(address indexed _receiver, uint256 indexed _value, uint256 indexed _timestamp); // Event to record each time Ether is paid out
event BurnTokens(uint256 indexed _value, uint256 indexed _timestamp); // Event to record when tokens are burned.
// Initialization
constructor(address _token) public {
// add address of the specific contract
token = LoligoToken(_token);
}
// Fallbck function for contribution
function () external payable whenNotPaused {
_buyPresaleTokens(msg.sender);
}
// Contribute Function, accepts incoming payments and tracks balances for each contributors
function _buyPresaleTokens(address _beneficiary) public payable {
require(presale1 || presale2);
require(msg.value >= 0.25 ether);
require(isWhitelisted(_beneficiary));
require(savedPresaleTokenBalance.add(_getTokensAmount(msg.value)) <= totalTokensForPresale);
if (msg.value >= 10 ether) {
_deliverBlockedTokens(_beneficiary);
}else {
_deliverTokens(_beneficiary);
}
}
/***********************************
* Public functions for the *
* Presale period *
************************************/
// Function to set Rate & tokens to sell for presale (period1)
function startPresale(uint256 _rate, uint256 _totalTokensForPresale) public onlyOwner {
require(_rate != 0 && _totalTokensForPresale != 0);
presaleRate = _rate;
totalTokensForPresale = _totalTokensForPresale;
presale1 = true;
presale2 = false;
}
// Function to move to the second period for presale (period2)
function updatePresale() public onlyOwner {
require(presale1);
presale1 = false;
presale2 = true;
}
// Function to close the presale period2
function closePresale() public onlyOwner {
require(presale2 || presale1);
presale1 = false;
presale2 = false;
}
// Function to transferOwnership of the LLG token
function transferTokenOwnership(address _newOwner) public onlyOwner {
token.transferOwnership(_newOwner);
}
// Function to transfer the rest of tokens not sold
function transferToken(address _crowdsale) public onlyOwner {
require(!presale1 && !presale2);
require(token.balanceOf(address(this)) > savedBonusToken);
uint256 tokensToTransfer = token.balanceOf(address(this)).sub(savedBonusToken);
token.transfer(_crowdsale, tokensToTransfer);
}
/***************************************
* internal functions *
****************************************/
function _deliverBlockedTokens(address _beneficiary) internal {
uint256 tokensAmount = msg.value.mul(presaleRate);
uint256 bonus = tokensAmount.mul(_checkPresaleBonus(msg.value)).div(100);
savedPresaleTokenBalance = savedPresaleTokenBalance.add(tokensAmount.add(bonus));
token.transfer(_beneficiary, tokensAmount);
savedBonusToken = savedBonusToken.add(bonus);
bonusBalances[_beneficiary] = bonusBalances[_beneficiary].add(bonus);
bonusList.push(_beneficiary);
wallet.transfer(msg.value);
emit PayEther(wallet, msg.value, now);
}
function _deliverTokens(address _beneficiary) internal {
uint256 tokensAmount = msg.value.mul(presaleRate);
uint256 tokensToTransfer = tokensAmount.add((tokensAmount.mul(_checkPresaleBonus(msg.value))).div(100));
savedPresaleTokenBalance = savedPresaleTokenBalance.add(tokensToTransfer);
token.transfer(_beneficiary, tokensToTransfer);
wallet.transfer(msg.value);
emit PayEther(wallet, msg.value, now);
}
function _checkPresaleBonus(uint256 _value) internal view returns (uint256){
if(presale1 && _value >= 0.25 ether){
return 40;
}else if(presale2 && _value >= 0.25 ether){
return 30;
}else{
return 0;
}
}
function _getTokensAmount(uint256 _value) internal view returns (uint256){
uint256 tokensAmount = _value.mul(presaleRate);
uint256 tokensToTransfer = tokensAmount.add((tokensAmount.mul(_checkPresaleBonus(_value))).div(100));
return tokensToTransfer;
}
}
|
Total sold tokens for presale
|
uint256 public savedPresaleTokenBalance;
| 12,560,508
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// TODO: remove ERC165
import {IERC1155} from './IERC1155.sol';
import {IERC1155Receiver} from './IERC1155Receiver.sol';
import {ERC1155BaseStorage} from './ERC1155BaseStorage.sol';
import {ERC165} from '../../introspection/ERC165.sol';
import {AddressUtils} from '../../utils/AddressUtils.sol';
/**
* @title Base ERC1155 contract
* @dev derived from https://github.com/OpenZeppelin/openzeppelin-contracts/ (MIT license)
*/
abstract contract ERC1155Base is IERC1155, ERC165 {
using AddressUtils for address;
/**
* @notice query the balance of given token held by given address
* @param account address to query
* @param id token to query
* @return token balance
*/
function balanceOf (
address account,
uint id
) override public view returns (uint) {
require(account != address(0), 'ERC1155: balance query for the zero address');
return ERC1155BaseStorage.layout().balances[id][account];
}
/**
* @notice query the balances of given tokens held by given addresses
* @param accounts addresss to query
* @param ids tokens to query
* @return token balances
*/
function balanceOfBatch (
address[] memory accounts,
uint[] memory ids
) override public view returns (uint[] memory) {
require(accounts.length == ids.length, 'ERC1155: accounts and ids length mismatch');
mapping (uint => mapping (address => uint)) storage balances = ERC1155BaseStorage.layout().balances;
uint[] memory batchBalances = new uint[](accounts.length);
for (uint i; i < accounts.length; i++) {
require(accounts[i] != address(0), 'ERC1155: batch balance query for the zero address');
batchBalances[i] = balances[ids[i]][accounts[i]];
}
return batchBalances;
}
/**
* @notice query approval status of given operator with respect to given address
* @param account address to query for approval granted
* @param operator address to query for approval received
* @return whether operator is approved to spend tokens held by account
*/
function isApprovedForAll (
address account,
address operator
) override public view returns (bool) {
return ERC1155BaseStorage.layout().operatorApprovals[account][operator];
}
/**
* @notice grant approval to or revoke approval from given operator to spend held tokens
* @param operator address whose approval status to update
* @param status whether operator should be considered approved
*/
function setApprovalForAll (
address operator,
bool status
) override public {
require(msg.sender != operator, 'ERC1155: setting approval status for self');
ERC1155BaseStorage.layout().operatorApprovals[msg.sender][operator] = status;
emit ApprovalForAll(msg.sender, operator, status);
}
/**
* @notice transfer tokens between given addresses, checking for ERC1155Receiver implementation if applicable
* @param from sender of tokens
* @param to receiver of tokens
* @param id token ID
* @param amount quantity of tokens to transfer
* @param data data payload
*/
function safeTransferFrom (
address from,
address to,
uint id,
uint amount,
bytes memory data
) override public {
require(from == msg.sender || isApprovedForAll(from, msg.sender), 'ERC1155: caller is not owner nor approved');
_safeTransfer(msg.sender, from, to, id, amount, data);
}
/**
* @notice transfer batch of tokens between given addresses, checking for ERC1155Receiver implementation if applicable
* @param from sender of tokens
* @param to receiver of tokens
* @param ids list of token IDs
* @param amounts list of quantities of tokens to transfer
* @param data data payload
*/
function safeBatchTransferFrom (
address from,
address to,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) override public {
require(from == msg.sender || isApprovedForAll(from, msg.sender), 'ERC1155: caller is not owner nor approved');
_safeTransferBatch(msg.sender, from, to, ids, amounts, data);
}
/**
* @notice mint given quantity of tokens for given address
* @dev ERC1155Receiver implemenation is not checked
* @param account beneficiary of minting
* @param id token ID
* @param amount quantity of tokens to mint
* @param data data payload
*/
function _mint (
address account,
uint id,
uint amount,
bytes memory data
) virtual internal {
require(account != address(0), 'ERC1155: mint to the zero address');
_beforeTokenTransfer(msg.sender, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
mapping (address => uint) storage balances = ERC1155BaseStorage.layout().balances[id];
balances[account] += amount;
emit TransferSingle(msg.sender, address(0), account, id, amount);
}
/**
* @notice mint given quantity of tokens for given address
* @param account beneficiary of minting
* @param id token ID
* @param amount quantity of tokens to mint
* @param data data payload
*/
function _safeMint (
address account,
uint id,
uint amount,
bytes memory data
) virtual internal {
_doSafeTransferAcceptanceCheck(msg.sender, address(0), account, id, amount, data);
_mint(account, id, amount, data);
}
/**
* @notice mint batch of tokens for given address
* @dev ERC1155Receiver implemenation is not checked
* @param account beneficiary of minting
* @param ids list of token IDs
* @param amounts list of quantities of tokens to mint
* @param data data payload
*/
function _mintBatch (
address account,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) virtual internal {
require(account != address(0), 'ERC1155: mint to the zero address');
require(ids.length == amounts.length, 'ERC1155: ids and amounts length mismatch');
_beforeTokenTransfer(msg.sender, address(0), account, ids, amounts, data);
mapping (uint => mapping (address => uint)) storage balances = ERC1155BaseStorage.layout().balances;
for (uint i; i < ids.length; i++) {
uint id = ids[i];
balances[id][account] += amounts[i];
}
emit TransferBatch(msg.sender, address(0), account, ids, amounts);
}
/**
* @notice mint batch of tokens for given address
* @param account beneficiary of minting
* @param ids list of token IDs
* @param amounts list of quantities of tokens to mint
* @param data data payload
*/
function _safeMintBatch (
address account,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) virtual internal {
_doSafeBatchTransferAcceptanceCheck(msg.sender, address(0), account, ids, amounts, data);
_mintBatch(account, ids, amounts, data);
}
/**
* @notice burn given quantity of tokens held by given address
* @param account holder of tokens to burn
* @param id token ID
* @param amount quantity of tokens to burn
*/
function _burn (
address account,
uint id,
uint amount
) virtual internal {
require(account != address(0), 'ERC1155: burn from the zero address');
_beforeTokenTransfer(msg.sender, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), '');
mapping (address => uint) storage balances = ERC1155BaseStorage.layout().balances[id];
require(balances[account] >= amount, 'ERC1155: burn amount exceeds balances');
balances[account] -= amount;
emit TransferSingle(msg.sender, account, address(0), id, amount);
}
/**
* @notice burn given batch of tokens held by given address
* @param account holder of tokens to burn
* @param ids token IDs
* @param amounts quantities of tokens to burn
*/
function _burnBatch (
address account,
uint[] memory ids,
uint[] memory amounts
) virtual internal {
require(account != address(0), 'ERC1155: burn from the zero address');
require(ids.length == amounts.length, 'ERC1155: ids and amounts length mismatch');
_beforeTokenTransfer(msg.sender, account, address(0), ids, amounts, '');
mapping (uint => mapping (address => uint)) storage balances = ERC1155BaseStorage.layout().balances;
for (uint i; i < ids.length; i++) {
uint id = ids[i];
require(balances[id][account] >= amounts[i], 'ERC1155: burn amount exceeds balance');
balances[id][account] -= amounts[i];
}
emit TransferBatch(msg.sender, account, address(0), ids, amounts);
}
/**
* @notice transfer tokens between given addresses
* @dev ERC1155Receiver implemenation is not checked
* @param operator executor of transfer
* @param sender sender of tokens
* @param recipient receiver of tokens
* @param id token ID
* @param amount quantity of tokens to transfer
* @param data data payload
*/
function _transfer (
address operator,
address sender,
address recipient,
uint id,
uint amount,
bytes memory data
) virtual internal {
require(recipient != address(0), 'ERC1155: transfer to the zero address');
_beforeTokenTransfer(operator, sender, recipient, _asSingletonArray(id), _asSingletonArray(amount), data);
mapping (uint => mapping (address => uint)) storage balances = ERC1155BaseStorage.layout().balances;
uint256 senderBalance = balances[id][sender];
require(senderBalance >= amount, 'ERC1155: insufficient balances for transfer');
unchecked {
balances[id][sender] = senderBalance - amount;
}
balances[id][recipient] += amount;
emit TransferSingle(operator, sender, recipient, id, amount);
}
/**
* @notice transfer tokens between given addresses
* @param operator executor of transfer
* @param sender sender of tokens
* @param recipient receiver of tokens
* @param id token ID
* @param amount quantity of tokens to transfer
* @param data data payload
*/
function _safeTransfer (
address operator,
address sender,
address recipient,
uint id,
uint amount,
bytes memory data
) virtual internal {
_doSafeTransferAcceptanceCheck(operator, sender, recipient, id, amount, data);
_transfer(operator, sender, recipient, id, amount, data);
}
/**
* @notice transfer batch of tokens between given addresses
* @dev ERC1155Receiver implemenation is not checked
* @param operator executor of transfer
* @param sender sender of tokens
* @param recipient receiver of tokens
* @param ids token IDs
* @param amounts quantities of tokens to transfer
* @param data data payload
*/
function _transferBatch (
address operator,
address sender,
address recipient,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) virtual internal {
require(recipient != address(0), 'ERC1155: transfer to the zero address');
require(ids.length == amounts.length, 'ERC1155: ids and amounts length mismatch');
_beforeTokenTransfer(operator, sender, recipient, ids, amounts, data);
mapping (uint => mapping (address => uint)) storage balances = ERC1155BaseStorage.layout().balances;
for (uint i; i < ids.length; i++) {
uint token = ids[i];
uint amount = amounts[i];
uint256 senderBalance = balances[token][sender];
require(senderBalance >= amount, 'ERC1155: insufficient balances for transfer');
unchecked {
balances[token][sender] = senderBalance - amount;
}
balances[token][recipient] += amount;
}
emit TransferBatch(operator, sender, recipient, ids, amounts);
}
/**
* @notice transfer batch of tokens between given addresses
* @param operator executor of transfer
* @param sender sender of tokens
* @param recipient receiver of tokens
* @param ids token IDs
* @param amounts quantities of tokens to transfer
* @param data data payload
*/
function _safeTransferBatch (
address operator,
address sender,
address recipient,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) virtual internal {
_doSafeBatchTransferAcceptanceCheck(operator, sender, recipient, ids, amounts, data);
_transferBatch(operator, sender, recipient, ids, amounts, data);
}
/**
* @notice wrap given element in array of length 1
* @param element element to wrap
* @return singleton array
*/
function _asSingletonArray (
uint element
) private pure returns (uint[] memory) {
uint[] memory array = new uint[](1);
array[0] = element;
return array;
}
/**
* @notice revert if applicable transfer recipient is not valid ERC1155Receiver
* @param operator executor of transfer
* @param from sender of tokens
* @param to receiver of tokens
* @param id token ID
* @param amount quantity of tokens to transfer
* @param data data payload
*/
function _doSafeTransferAcceptanceCheck (
address operator,
address from,
address to,
uint id,
uint amount,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
require(
response == IERC1155Receiver.onERC1155Received.selector,
'ERC1155: ERC1155Receiver rejected tokens'
);
} catch Error(string memory reason) {
revert(reason);
} catch {
revert('ERC1155: transfer to non ERC1155Receiver implementer');
}
}
}
/**
* @notice revert if applicable transfer recipient is not valid ERC1155Receiver
* @param operator executor of transfer
* @param from sender of tokens
* @param to receiver of tokens
* @param ids token IDs
* @param amounts quantities of tokens to transfer
* @param data data payload
*/
function _doSafeBatchTransferAcceptanceCheck (
address operator,
address from,
address to,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (bytes4 response) {
require(
response == IERC1155Receiver.onERC1155BatchReceived.selector,
'ERC1155: ERC1155Receiver rejected tokens'
);
} catch Error(string memory reason) {
revert(reason);
} catch {
revert('ERC1155: transfer to non ERC1155Receiver implementer');
}
}
}
/**
* @notice ERC1155 hook, called before all transfers including mint and burn
* @dev function should be overridden and new implemenation must call super
* @dev called for both single and batch transfers
* @param operator executor of transfer
* @param from sender of tokens
* @param to receiver of tokens
* @param ids token IDs
* @param amounts quantities of tokens to transfer
* @param data data payload
*/
function _beforeTokenTransfer (
address operator,
address from,
address to,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) virtual internal {}
}
|
* @notice transfer batch of tokens between given addresses @param operator executor of transfer @param sender sender of tokens @param recipient receiver of tokens @param ids token IDs @param amounts quantities of tokens to transfer @param data data payload/
|
function _safeTransferBatch (
address operator,
address sender,
address recipient,
uint[] memory ids,
uint[] memory amounts,
bytes memory data
) virtual internal {
_doSafeBatchTransferAcceptanceCheck(operator, sender, recipient, ids, amounts, data);
_transferBatch(operator, sender, recipient, ids, amounts, data);
}
| 909,039
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// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./IERC1363.sol";
import "./IERC1363Receiver.sol";
import "./IERC1363Spender.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/introspection/ERC165Checker.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/introspection/ERC165.sol";
contract ERC1363 is ERC20, IERC1363, ERC165 {
using Address for address;
/*
* Note: the ERC-165 identifier for this interface is 0x4bbee2df.
* 0x4bbee2df ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)'))
*/
bytes4 internal constant _INTERFACE_ID_ERC1363_TRANSFER = 0x4bbee2df;
/*
* Note: the ERC-165 identifier for this interface is 0xfb9ec8ce.
* 0xfb9ec8ce ===
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
*/
bytes4 internal constant _INTERFACE_ID_ERC1363_APPROVE = 0xfb9ec8ce;
// Equals to `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC1363Receiver(0).onTransferReceived.selector`
bytes4 private constant _ERC1363_RECEIVED = 0x88a7ca5c;
// Equals to `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))`
// which can be also obtained as `IERC1363Spender(0).onApprovalReceived.selector`
bytes4 private constant _ERC1363_APPROVED = 0x7b04a2d0;
/**
* @param name Name of the token
* @param symbol A symbol to be used as ticker
*/
constructor (string memory name, string memory symbol) ERC20(name, symbol) {
// register the supported interfaces to conform to ERC1363 via ERC165
_registerInterface(_INTERFACE_ID_ERC1363_TRANSFER);
_registerInterface(_INTERFACE_ID_ERC1363_APPROVE);
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param recipient The address to transfer to.
* @param amount The amount to be transferred.
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCall(address recipient, uint256 amount) public virtual override returns (bool) {
return transferAndCall(recipient, amount, "");
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param recipient The address to transfer to
* @param amount The amount to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCall(address recipient, uint256 amount, bytes memory data) public virtual override returns (bool) {
transfer(recipient, amount);
require(_checkAndCallTransfer(_msgSender(), recipient, amount, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
/**
* @dev Transfer tokens from one address to another and then execute a callback on recipient.
* @param sender The address which you want to send tokens from
* @param recipient The address which you want to transfer to
* @param amount The amount of tokens to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function transferFromAndCall(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
return transferFromAndCall(sender, recipient, amount, "");
}
/**
* @dev Transfer tokens from one address to another and then execute a callback on recipient.
* @param sender The address which you want to send tokens from
* @param recipient The address which you want to transfer to
* @param amount The amount of tokens to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferFromAndCall(address sender, address recipient, uint256 amount, bytes memory data) public virtual override returns (bool) {
transferFrom(sender, recipient, amount);
require(_checkAndCallTransfer(sender, recipient, amount, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to
* @param amount The amount allowed to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCall(address spender, uint256 amount) public virtual override returns (bool) {
return approveAndCall(spender, amount, "");
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to.
* @param amount The amount allowed to be transferred.
* @param data Additional data with no specified format.
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCall(address spender, uint256 amount, bytes memory data) public virtual override returns (bool) {
approve(spender, amount);
require(_checkAndCallApprove(spender, amount, data), "ERC1363: _checkAndCallApprove reverts");
return true;
}
/**
* @dev Internal function to invoke `onTransferReceived` on a target address
* The call is not executed if the target address is not a contract
* @param sender address Representing the previous owner of the given token value
* @param recipient address Target address that will receive the tokens
* @param amount uint256 The amount mount of tokens 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 _checkAndCallTransfer(address sender, address recipient, uint256 amount, bytes memory data) internal virtual returns (bool) {
if (!recipient.isContract()) {
return false;
}
bytes4 retval = IERC1363Receiver(recipient).onTransferReceived(
_msgSender(), sender, amount, data
);
return (retval == _ERC1363_RECEIVED);
}
/**
* @dev Internal function to invoke `onApprovalReceived` on a target address
* The call is not executed if the target address is not a contract
* @param spender address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
* @param data bytes Optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function _checkAndCallApprove(address spender, uint256 amount, bytes memory data) internal virtual returns (bool) {
if (!spender.isContract()) {
return false;
}
bytes4 retval = IERC1363Spender(spender).onApprovalReceived(
_msgSender(), amount, data
);
return (retval == _ERC1363_APPROVED);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
/**
* @title ERC20Mintable
* @dev Implementation of the ERC20Mintable. Extension of {ERC20} that adds a minting behaviour.
*/
abstract contract ERC20Mintable is ERC20 {
// indicates if minting is finished
bool private _mintingFinished = false;
/**
* @dev Emitted during finish minting
*/
event MintFinished();
/**
* @dev Tokens can be minted only before minting finished.
*/
modifier canMint() {
require(!_mintingFinished, "ERC20Mintable: minting is finished");
_;
}
/**
* @return if minting is finished or not.
*/
function mintingFinished() public view returns (bool) {
return _mintingFinished;
}
/**
* @dev Function to mint tokens.
*
* WARNING: it allows everyone to mint new tokens. Access controls MUST be defined in derived contracts.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function mint(address account, uint256 amount) public canMint {
_mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* WARNING: it allows everyone to finish minting. Access controls MUST be defined in derived contracts.
*/
function finishMinting() public canMint {
_finishMinting();
}
/**
* @dev Function to stop minting new tokens.
*/
function _finishMinting() internal virtual {
_mintingFinished = true;
emit MintFinished();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/introspection/IERC165.sol";
interface IERC1363 is IERC20, IERC165 {
/*
* Note: the ERC-165 identifier for this interface is 0x4bbee2df.
* 0x4bbee2df ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)'))
*/
/*
* Note: the ERC-165 identifier for this interface is 0xfb9ec8ce.
* 0xfb9ec8ce ===
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
*/
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferAndCall(address recipient, uint256 amount) external returns (bool);
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `recipient`
* @return true unless throwing
*/
function transferAndCall(address recipient, uint256 amount, bytes calldata data) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @param sender address The address which you want to send tokens from
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferFromAndCall(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @param sender address The address which you want to send tokens from
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `recipient`
* @return true unless throwing
*/
function transferFromAndCall(address sender, address recipient, uint256 amount, bytes calldata data) external returns (bool);
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* 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 address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
*/
function approveAndCall(address spender, uint256 amount) external returns (bool);
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* 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 address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format, sent in call to `spender`
*/
function approveAndCall(address spender, uint256 amount, bytes calldata data) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface IERC1363Receiver {
/*
* Note: the ERC-165 identifier for this interface is 0x88a7ca5c.
* 0x88a7ca5c === bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))
*/
/**
* @notice Handle the receipt of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after a `transfer` or a `transferFrom`. This function MAY throw to revert and reject the
* transfer. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param operator address The address which called `transferAndCall` or `transferFromAndCall` function
* @param sender address The address which are token transferred from
* @param amount uint256 The amount of tokens transferred
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))` unless throwing
*/
function onTransferReceived(address operator, address sender, uint256 amount, bytes calldata data) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface IERC1363Spender {
/*
* Note: the ERC-165 identifier for this interface is 0x7b04a2d0.
* 0x7b04a2d0 === bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))
*/
/**
* @notice Handle the approval of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after an `approve`. This function MAY throw to revert and reject the
* approval. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param sender address The address which called `approveAndCall` function
* @param amount uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))` unless throwing
*/
function onApprovalReceived(address sender, uint256 amount, bytes calldata data) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Capped.sol";
import "./ERC1363.sol";
import "./ERC20Mintable.sol";
import "./Roles.sol";
import "./TokenRecover.sol";
/**
* @title ONECRO
* @dev Implementation of the ONECRO
*/
contract ONECRO is ERC20Capped, ERC20Mintable, ERC20Burnable, ERC1363, TokenRecover, Roles {
constructor (
string memory name,
string memory symbol,
uint8 decimals,
uint256 cap,
uint256 initialBalance
)
ERC1363(name, symbol)
ERC20Capped(cap)
{
_setupDecimals(decimals);
_mint(_msgSender(), initialBalance);
}
/**
* @dev Function to mint tokens.
*
* NOTE: restricting access to addresses with MINTER role. See {ERC20Mintable-mint}.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function _mint(address account, uint256 amount) internal override onlyMinter {
super._mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* NOTE: restricting access to owner only. See {ERC20Mintable-finishMinting}.
*/
function _finishMinting() internal override onlyOwner {
super._finishMinting();
}
/**
* @dev See {ERC20-_beforeTokenTransfer}. See {ERC20Capped-_beforeTokenTransfer}.
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Capped) {
super._beforeTokenTransfer(from, to, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "@openzeppelin/contracts/access/AccessControl.sol";
contract Roles is AccessControl {
bytes32 public constant MINTER_ROLE = keccak256("MINTER");
constructor () {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
}
modifier onlyMinter() {
require(hasRole(MINTER_ROLE, _msgSender()), "Roles: caller does not have the MINTER role");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract TokenRecover is Ownable {
/**
* @dev Remember that only owner can call so be careful when use on contracts generated from other contracts.
* @param tokenAddress The token contract address
* @param tokenAmount Number of tokens to be sent
*/
function recoverERC20(address tokenAddress, uint256 tokenAmount) public onlyOwner {
IERC20(tokenAddress).transfer(owner(), tokenAmount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/EnumerableSet.sol";
import "../utils/Address.sol";
import "../GSN/Context.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @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;
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @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, _INTERFACE_ID_ERC165) &&
!_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 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) {
// success determines whether the staticcall succeeded and result determines
// whether the contract at account indicates support of _interfaceId
(bool success, bool result) = _callERC165SupportsInterface(account, interfaceId);
return (success && result);
}
/**
* @notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw
* @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 success true if the STATICCALL succeeded, false otherwise
* @return result true if the STATICCALL succeeded and the contract at account
* indicates support of the interface with identifier interfaceId, false otherwise
*/
function _callERC165SupportsInterface(address account, bytes4 interfaceId)
private
view
returns (bool, bool)
{
bytes memory encodedParams = abi.encodeWithSelector(_INTERFACE_ID_ERC165, interfaceId);
(bool success, bytes memory result) = account.staticcall{ gas: 30000 }(encodedParams);
if (result.length < 32) return (false, false);
return (success, abi.decode(result, (bool)));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view 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 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 { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../GSN/Context.sol";
import "./ERC20.sol";
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
using SafeMath for uint256;
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./ERC20.sol";
/**
* @dev Extension of {ERC20} that adds a cap to the supply of tokens.
*/
abstract contract ERC20Capped is ERC20 {
using SafeMath for uint256;
uint256 private _cap;
/**
* @dev Sets the value of the `cap`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint256 cap_) internal {
require(cap_ > 0, "ERC20Capped: cap is 0");
_cap = cap_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view returns (uint256) {
return _cap;
}
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - minted tokens must not cause the total supply to go over the cap.
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
if (from == address(0)) { // When minting tokens
require(totalSupply().add(amount) <= _cap, "ERC20Capped: cap exceeded");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <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);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(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));
}
}
|
* @title ONECRO @dev Implementation of the ONECRO/
|
contract ONECRO is ERC20Capped, ERC20Mintable, ERC20Burnable, ERC1363, TokenRecover, Roles {
constructor (
string memory name,
string memory symbol,
uint8 decimals,
uint256 cap,
uint256 initialBalance
)
ERC1363(name, symbol)
ERC20Capped(cap)
}
{
_setupDecimals(decimals);
_mint(_msgSender(), initialBalance);
}
function _mint(address account, uint256 amount) internal override onlyMinter {
super._mint(account, amount);
}
function _finishMinting() internal override onlyOwner {
super._finishMinting();
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Capped) {
super._beforeTokenTransfer(from, to, amount);
}
}
| 11,937,216
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./full_match/8453/0x41515205f2F5208645b802a88458d45068758E8B/sources/contracts/Router.sol
|
4 rounds of iteration to perform up to 4 swaps
|
function getPrice(address[] calldata path, uint256[3][] calldata swapParams) external view returns (uint256 price) {
address inputToken = path[0];
if (inputToken == address(0)) inputToken = WETH_ADDRESS;
price = 10 ** 18;
for (uint256 i = 1; i < path.length / 2 + 1; ++i) {
address swap = path[i * 2 - 1];
if (swap == address(0)) {
break;
}
address outputToken = path[i * 2];
if (outputToken == address(0)) outputToken = WETH_ADDRESS;
_checkSwapParams(inputToken, outputToken, swap, params);
if (params[2] == 1) {
price = (price * IStableSwap(swap).getPrice(params[0], params[1])) / 10 ** 18;
price = (price * IMetaPool(swap).getPrice(params[0], params[1])) / 10 ** 18;
price = (price * ICryptoSwap2Pool(swap).getPrice(params[0], params[1])) / 10 ** 18;
revert("Bad swap type");
}
inputToken = outputToken;
}
}
| 11,554,272
|
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/**
PRINCE - PrincessAzula Protector
Every Princess needs her Prince to protect her,
To rise to the top, AZULA will need support.
I have been chosen to support and protect her to the top.
Together, we will reach the top, and rule everything, and everyone.
o .,<>., o
|\/\/\/\/|
'========'
(_ SSSSSSs
)a'`SSSSSs
/_ SSSSSS
.=## SSSSS
.#### SSSSs
###::::SSSSS
.;:::""""SSS
.:;:' . . \\
.::/ ' .'|
.::( . |
:::) \
/\( /
/) ( |
.' \ . ./ /
_-' |\ . |
_..--.. . /"---\ | ` | . |
-=====================,' _ \=(*#(7.#####() | `/_.. , (
_.-''``';'-''-) ,. \ ' '+/// | .'/ \ ``-.) \
,' _.- (( `-' `._\ `` \_/_.' ) /`-._ ) |
,'\ ,' _.'.`:-. \.-' / <_L )" |
_/ `._,' ,')`; `-'`' | L / /
/ `. ,' ,|_/ / \ ( <_-' \
\ / `./ ' / /,' \ /|` `. |
)\ /`._ ,'`._.-\ |) \'
/ `.' )-'.-,' )__) |\ `|
: /`. `.._(--.`':`':/ \ ) \ \
|::::\ ,'/::;-)) / ( )`. |
||::::: . .::': :`-( |/ . |
||::::| . :| |==[]=: . - \
|||:::| : || : | | /\ ` |
___ ___ '|;:::| | |' \=[]=| / \ \
| /_ ||``|||::::: | ; | | | \_.'\_ `-.
: \_``[]--[]|::::'\_;' )-'..`._ .-'\``:: ` . \
\___.>`''-.||:.__,' SSt |_______`> <_____:::. . . \ _/
`+a:f:......jrei'''
- 100% of Marketing Fees will be used to buy and BURN AZULA.
- 1% max transaction, 2% max wallet - lifted once coin is stable.
- LP Locked and Contract Renounced
- Track Burns through creator wallet transactions
AZULA's TG: https://t.me/princessazulaE
**/
// SPDX-License-Identifier: MIT
pragma solidity =0.8.10 >=0.8.10 >=0.8.0 <0.9.0;
pragma experimental ABIEncoderV2;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
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");
_;
}
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);
}
}
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);
/**
* @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 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);
}
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;
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;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
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);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_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");
unchecked {
_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");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(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);
_afterTokenTransfer(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");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(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 {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
library SafeMath {
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);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
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);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
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;
}
}
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 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 (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 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 (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
contract PRINCE is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public marketingWallet;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 25; // 25 = .25%
bool public lpBurnEnabled = true;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public sellDevFee;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
/******************/
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
mapping(address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(
address indexed newAddress,
address indexed oldAddress
);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event marketingWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event devWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("AZULA Protector", unicode"PRINCE") {
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 = 3;
uint256 _buyLiquidityFee = 1;
uint256 _buyDevFee = 6;
uint256 _sellMarketingFee = 3;
uint256 _sellLiquidityFee = 1;
uint256 _sellDevFee = 6;
uint256 totalSupply = 1_000_000_000 * 1e18;
maxTransactionAmount = 10_000_000 * 1e18;
maxWallet = 20_000_000 * 1e18;
swapTokensAtAmount = (totalSupply * 5) / 10000;
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
marketingWallet = address(0x04aEfE7b80d62d387CF97716492B595e104765e8); // set as marketing wallet
devWallet = address(0x04aEfE7b80d62d387CF97716492B595e104765e8); // set as dev wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {}
// once enabled, can never be turned off
function StartTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool) {
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool) {
transferDelayEnabled = false;
return true;
}
function updateSwapTokensAtAmount(uint256 newAmount)
external
onlyOwner
returns (bool)
{
require(
newAmount >= (totalSupply() * 1) / 100000,
"Swap amount cannot be lower than 0.001% total supply."
);
require(
newAmount <= (totalSupply() * 5) / 1000,
"Swap amount cannot be higher than 0.5% total supply."
);
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000 ) / 1e18,
"Cannot set maxTransactionAmount lower than 0.1%"
);
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set maxWallet lower than 0.5%"
);
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx)
public
onlyOwner
{
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function updateBuyFees(
uint256 _marketingFee,
uint256 _liquidityFee,
uint256 _devFee
) external onlyOwner {
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyDevFee = _devFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
require(buyTotalFees <= 10, "Must keep fees at 10% or less");
}
function updateSellFees(
uint256 _marketingFee,
uint256 _liquidityFee,
uint256 _devFee
) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellDevFee = _devFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
require(sellTotalFees <= 10, "Must keep fees at 10% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value)
public
onlyOwner
{
require(
pair != uniswapV2Pair,
"The pair cannot be removed from automatedMarketMakerPairs"
);
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet)
external
onlyOwner
{
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
//when buy
if (
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
//when sell
else if (
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
} else if (!_isExcludedMaxTransactionAmount[to]) {
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellDevFee) / sellTotalFees;
tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyDevFee) / buyTotalFees;
tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0,
0,
deadAddress,
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForMarketing +
tokensForDev;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(
totalTokensToSwap
);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
(success, ) = address(devWallet).call{value: ethForDev}("");
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(marketingWallet).call{
value: address(this).balance
}("");
}
function setAutoLPBurnSettings(
uint256 _frequencyInSeconds,
uint256 _percent,
bool _Enabled
) external onlyOwner {
require(
_frequencyInSeconds >= 600,
"cannot set buyback more often than every 10 minutes"
);
require(
_percent <= 1000 && _percent >= 0,
"Must set auto LP burn percent between 0% and 10%"
);
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool) {
lastLpBurnTime = block.timestamp;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent)
external
onlyOwner
returns (bool)
{
require(
block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
"Must wait for cooldown to finish"
);
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
}
|
/ | .'/ \ ``-.) \
|
_.-''``';'-''-) ,. \ ' '+
| 5,926,406
|
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pragma solidity ^0.4.13;
// potprotocol.com
// Decentralized Coffee Pot Control Protocol Contract
// move along, nothing to see here, only the copy-pasted stuff
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;
}
}
contract ERC20Basic {
uint256 public totalSupply;
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 BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) 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 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];
}
}
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);
}
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;
}
}
contract Pausable is Ownable {
using SafeMath for uint256;
event Pause();
event Unpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused || msg.sender == address(this));
_;
}
/**
* @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 {
require(msg.sender != address(0));
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
require(msg.sender != address(0));
paused = false;
Unpause();
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
event Burn(address indexed burner, uint256 value);
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* 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, uint256 _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, uint256 _subtractedValue) public returns (bool) {
uint256 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;
}
/**
* @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);
}
}
contract PausableToken is StandardToken, Pausable {
using SafeMath for uint256;
/**
* @dev StandardToken modified with pausable transfers.
**/
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, uint256 _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint256 _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
}
contract PotToken is PausableToken {
using SafeMath for uint256;
address owner = msg.sender;
bool public stop = false;
uint256 public totalContribution = 0;
uint256 public constant fundingStartTime = 1522587600; // crowdsale start time
uint256 public constant fundingEndTime = 5404107600; // crowdsale end time
uint256 public constant tokensPerEthPrice = 200; // token per eth
function name() public pure returns (string) { return "Decentralized Coffee Pot Control Protocol"; }
function symbol() public pure returns (string) { return "DCPCP"; }
function decimals() public pure returns (uint8) { return 18; }
function balanceOf(address _owner) public constant returns (uint256) { return balances[_owner]; }
function getStats() public constant returns (uint256, uint256) {
return (totalContribution, totalSupply);
}
function stopIt() public onlyOwner returns (bool) {
require(!stop);
stop = true;
return true;
}
function() external payable {
require(!(msg.value == 0)
&& (!stop)
&& (now >= fundingStartTime)
&& (now <= fundingEndTime));
uint256 rewardTransferAmount = 0;
totalContribution = (totalContribution.add(msg.value));
rewardTransferAmount = (msg.value.mul(tokensPerEthPrice));
totalSupply = (totalSupply.add(rewardTransferAmount));
balances[msg.sender] = (balances[msg.sender].add(rewardTransferAmount));
owner.transfer(msg.value);
Transfer(address(this), msg.sender, rewardTransferAmount);
}
}
|
crowdsale end time
|
uint256 public constant fundingEndTime = 5404107600;
| 13,438,301
|
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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.7;
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableMap.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../../utils/Utils.sol";
import "../../access/PermitControl.sol";
import "../../proxy/StubProxyRegistry.sol";
import "../../interfaces/ISuper721IMXLock.sol";
/**
@title An ERC-721 item creation contract.
@author Tim Clancy
@author 0xthrpw
@author Qazawat Zirak
This contract represents the NFTs within a single collection. It allows for a
designated collection owner address to manage the creation of NFTs within this
collection. The collection owner grants approval to or removes approval from
other addresses governing their ability to mint NFTs from this collection.
This contract is forked from the inherited OpenZeppelin dependency, and uses
ideas inherited from the Super721 reference implementation.
August 4th, 2021.
*/
contract Super721IMX is PermitControl, ERC165Storage, IERC721 {
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
/// The public identifier for the right to set this contract's metadata URI.
bytes32 public constant SET_URI = keccak256("SET_URI");
/// The public identifier for the right to set this contract's proxy registry.
bytes32 public constant SET_PROXY_REGISTRY = keccak256("SET_PROXY_REGISTRY");
/// The public identifier for the right to configure item groups.
bytes32 public constant CONFIGURE_GROUP = keccak256("CONFIGURE_GROUP");
/// The public identifier for the right to mint items.
bytes32 public constant MINT = keccak256("MINT");
/// The public identifier for the right to burn items.
bytes32 public constant BURN = keccak256("BURN");
/// The public identifier for the right to set item metadata.
bytes32 public constant SET_METADATA = keccak256("SET_METADATA");
/// The public identifier for the right to lock the metadata URI.
bytes32 public constant LOCK_URI = keccak256("LOCK_URI");
/// The public identifier for the right to lock an item's metadata.
bytes32 public constant LOCK_ITEM_URI = keccak256("LOCK_ITEM_URI");
/// The public identifier for the right to disable item creation.
bytes32 public constant LOCK_CREATION = keccak256("LOCK_CREATION");
/*
* 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 ^ 0xe985e9c ^ 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 Supply the magic number for the required ERC-721 interface.
/// @dev A mask for isolating an item's group ID.
uint256 private constant GROUP_MASK = uint256(type(uint128).max) << 128;
/// The public name of this contract.
string public name;
string public symbol;
/**
The ERC-721 URI for tracking item metadata, supporting {id} substitution.
For example: https://token-cdn-domain/{id}.json. See the ERC-721 spec for
more details: https://eips.ethereum.org/EIPS/eip-721#metadata.
*/
string public metadataUri;
/// The URI for the storefront-level metadata of contract
string public contractURI;
/// A proxy registry address for supporting automatic delegated approval.
address public proxyRegistryAddress;
/// The address of the IMX core contract for L2 minting.
address public imxCoreAddress;
/// The address of the global lock for all 721IMX instances.
address public super721IMXLock;
/// @dev A mapping from each token ID to per-address balances.
mapping (uint256 => mapping(address => uint256)) public balances;
/// A mapping from each group ID to per-address balances.
mapping (uint256 => mapping(address => uint256)) public groupBalances;
/// A mapping from each address to a collection-wide balance.
mapping(address => uint256) public totalBalances;
// 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;
/**
@dev This is a mapping from each address to per-address operator approvals.
Operators are those addresses that have been approved to transfer tokens on
behalf of the approver. Transferring tokens includes the right to burn
tokens.
*/
mapping (address => mapping(address => bool)) private operatorApprovals;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
/**
This enumeration lists the various supply types that each item group may
use. In general, the administrator of this collection or those permissioned
to do so may move from a more-permissive supply type to a less-permissive.
For example: an uncapped or flexible supply type may be converted to a
capped supply type. A capped supply type may not be uncapped later, however.
@param Capped There exists a fixed cap on the size of the item group. The
cap is set by `supplyData`.
@param Uncapped There is no cap on the size of the item group. The value of
`supplyData` cannot be set below the current circulating supply but is
otherwise ignored.
@param Flexible There is a cap which can be raised or lowered (down to
circulating supply) freely. The value of `supplyData` cannot be set below
the current circulating supply and determines the cap.
*/
enum SupplyType {
Capped,
Uncapped,
Flexible
}
/**
This enumeration lists the various burn types that each item group may use.
These are static once chosen.
@param None The items in this group may not be burnt. The value of
`burnData` is ignored.
@param Burnable The items in this group may be burnt. The value of
`burnData` is the maximum that may be burnt.
@param Replenishable The items in this group, once burnt, may be reminted by
the owner. The value of `burnData` is ignored.
*/
enum BurnType {
None,
Burnable,
Replenishable
}
/**
This struct is a source of mapping-free input to the `configureGroup`
function. It defines the settings for a particular item group.
@param name A name for the item group.
@param supplyType The supply type for this group of items.
@param supplyData An optional integer used by some `supplyType` values.
@param burnType The type of burning permitted by this item group.
@param burnData An optional integer used by some `burnType` values.
*/
struct ItemGroupInput {
string name;
SupplyType supplyType;
uint256 supplyData;
BurnType burnType;
uint256 burnData;
}
/**
This struct defines the settings for a particular item group and is tracked
in storage.
@param initialized Whether or not this `ItemGroup` has been initialized.
@param name A name for the item group.
@param supplyType The supply type for this group of items.
@param supplyData An optional integer used by some `supplyType` values.
@param burnType The type of burning permitted by this item group.
@param burnData An optional integer used by some `burnType` values.
@param circulatingSupply The number of individual items within this group in
circulation.
@param mintCount The number of times items in this group have been minted.
@param burnCount The number of times items in this group have been burnt.
*/
struct ItemGroup {
bool initialized;
string name;
SupplyType supplyType;
uint256 supplyData;
BurnType burnType;
uint256 burnData;
uint256 circulatingSupply;
uint256 mintCount;
uint256 burnCount;
}
/// A mapping of data for each item group.
mapping (uint256 => ItemGroup) public itemGroups;
/// A mapping of circulating supplies for each individual token.
mapping (uint256 => uint256) public circulatingSupply;
/// A mapping of the number of times each individual token has been minted.
mapping (uint256 => uint256) public mintCount;
/// A mapping of the number of times each individual token has been burnt.
mapping (uint256 => uint256) public burnCount;
/**
A mapping of token ID to a boolean representing whether the item's metadata
has been explicitly frozen via a call to `lockURI(string calldata _uri,
uint256 _id)`. Do note that it is possible for an item's mapping here to be
false while still having frozen metadata if the item collection as a whole
has had its `uriLocked` value set to true.
*/
mapping (uint256 => bool) public metadataFrozen;
/**
A public mapping of optional on-chain metadata for each token ID. A token's
on-chain metadata is unable to be changed if the item's metadata URI has
been permanently fixed or if the collection's metadata URI as a whole has
been frozen.
*/
mapping (uint256 => string) public blueprints;
/// Whether or not the metadata URI has been locked to future changes.
bool public uriLocked;
/// Whether or not the metadata URI has been locked to future changes.
bool public contractUriLocked;
/// Whether or not the item collection has been locked to all further minting.
bool public locked;
/**
An event that gets emitted when the metadata collection URI is changed.
@param oldURI The old metadata URI.
@param newURI The new metadata URI.
*/
event ChangeURI(string indexed oldURI, string indexed newURI);
/**
An event that gets emitted when the contract URI is changed.
@param oldURI The old metadata URI.
@param newURI The new metadata URI.
*/
event ChangeContractURI(string indexed oldURI, string indexed newURI);
/**
An event that gets emitted when the proxy registry address is changed.
@param oldRegistry The old proxy registry address.
@param newRegistry The new proxy registry address.
*/
event ChangeProxyRegistry(address indexed oldRegistry,
address indexed newRegistry);
/**
An event that gets emitted when an item group is configured.
@param manager The caller who configured the item group `_groupId`.
@param groupId The groupId being configured.
@param newGroup The new group configuration.
*/
event ItemGroupConfigured(address indexed manager, uint256 groupId,
ItemGroupInput indexed newGroup);
/**
An event that gets emitted when the item collection is locked to further
creation.
@param locker The caller who locked the collection.
*/
event CollectionLocked(address indexed locker);
/**
An event that gets emitted when a token ID has its on-chain metadata
changed.
@param changer The caller who triggered the metadata change.
@param id The ID of the token which had its metadata changed.
@param oldMetadata The old metadata of the token.
@param newMetadata The new metadata of the token.
*/
event MetadataChanged(address indexed changer, uint256 indexed id,
string oldMetadata, string indexed newMetadata);
/**
An event that indicates we have set a permanent metadata URI for a token.
@param _value The value of the permanent metadata URI.
@param _id The token ID associated with the permanent metadata value.
*/
event PermanentURI(string _value, uint256 indexed _id);
/**
An event that indicates we have set a permanent contract URI.
@param _value The value of the permanent contract URI.
@param _id The token ID associated with the permanent contract value.
*/
event PermanentContractURI(string _value, uint256 indexed _id);
/**
A modifier which allows only the super-administrative owner or addresses
with a specified valid right to perform a call on some specific item. Rights
can be applied to the universal circumstance, the item-group-level
circumstance, or to the circumstance of the item ID itself.
@param _id The item ID on which we check for the validity of the specified
`right`.
@param _right The right to validate for the calling address. It must be
non-expired and exist within the specified `_itemId`.
*/
modifier hasItemRight(uint256 _id, bytes32 _right) {
uint256 groupId = (_id & GROUP_MASK) >> 128;
if (_msgSender() == owner()) {
_;
} else if (hasRight(_msgSender(), UNIVERSAL, _right)) {
_;
} else if (hasRight(_msgSender(), bytes32(groupId), _right)) {
_;
} else if (hasRight(_msgSender(), bytes32(_id), _right)) {
_;
} else {
revert("Ix01");
}
}
/**
Construct a new ERC-721 item collection.
@param _owner The address of the administrator governing this collection.
@param _name The name to assign to this item collection contract.
@param _metadataURI The metadata URI to perform later token ID substitution with.
@param _contractURI The contract URI.
@param _proxyRegistryAddress The address of a proxy registry contract.
@param _imxCoreAddress The address of the IMX core contract for L2 minting.
*/
constructor(address _owner, string memory _name, string memory _symbol, string memory _metadataURI,
string memory _contractURI, address _proxyRegistryAddress, address _imxCoreAddress, address _super721IMXLock) {
// Do not perform a redundant ownership transfer if the deployer should
// remain as the owner of the collection.
if (_owner != owner()) {
transferOwnership(_owner);
}
// Register 721 interfaces
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
// Continue initialization.
name = _name;
symbol = _symbol;
metadataUri = _metadataURI;
contractURI = _contractURI;
proxyRegistryAddress = _proxyRegistryAddress;
imxCoreAddress = _imxCoreAddress;
super721IMXLock = _super721IMXLock;
}
/**
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _tokenOwners.get(tokenId, "Ix02");
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ownerOf(tokenId);
require(to != owner, "Ix03");
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"Ix04"
);
_tokenApprovals[tokenId] = to;
emit Approval(ownerOf(tokenId), to, tokenId);
}
/**
Return a version number for this contract's interface.
*/
function version() external virtual pure override returns (uint256) {
return 1;
}
/**
Return the item collection's metadata URI. This implementation returns the
same URI for all tokens within the collection and relies on client-side
ID substitution per https://eips.ethereum.org/EIPS/eip-721#metadata. Per
said specification, clients calling this function must replace the {id}
substring with the actual token ID in hex, not prefixed by 0x, and padded
to 64 characters in length.
@return The metadata URI string of the item with ID `_itemId`.
*/
function tokenURI(uint256 id) external view returns (string memory) {
if(bytes(metadataUri).length == 0){
return blueprints[id];
}
return Utils.interpolate(metadataUri, id);
}
/**
Allow the item collection owner or an approved manager to update the
metadata URI of this collection. This implementation relies on a single URI
for all items within the collection, and as such does not emit the standard
URI event. Instead, we emit our own event to reflect changes in the URI.
@param _uri The new URI to update to.
*/
function setURI(string calldata _uri) external virtual
hasValidPermit(UNIVERSAL, SET_URI) {
require(!uriLocked,
"Ix05");
string memory oldURI = metadataUri;
metadataUri = _uri;
emit ChangeURI(oldURI, _uri);
}
/**
Allow approved manager to update the contract URI. At the end of update, we
emit our own event to reflect changes in the URI.
@param _uri The new contract URI to update to.
*/
function setContractURI(string calldata _uri) external virtual
hasValidPermit(UNIVERSAL, SET_URI) {
require(!contractUriLocked,
"Ix06");
string memory oldContractUri = contractURI;
contractURI = _uri;
emit ChangeContractURI(oldContractUri, _uri);
}
/**
Allow the item collection owner or an approved manager to update the proxy
registry address handling delegated approval.
@param _proxyRegistryAddress The address of the new proxy registry to
update to.
*/
function setProxyRegistry(address _proxyRegistryAddress) external virtual
hasValidPermit(UNIVERSAL, SET_PROXY_REGISTRY) {
address oldRegistry = proxyRegistryAddress;
proxyRegistryAddress = _proxyRegistryAddress;
emit ChangeProxyRegistry(oldRegistry, _proxyRegistryAddress);
}
/**
Retrieve the balance of a particular token `_id` for a particular address
`_owner`.
@param _owner The owner to check for this token balance.
@param _id The ID of the token to check for a balance.
@return The amount of token `_id` owned by `_owner`.
*/
function balanceOfGroup(address _owner, uint256 _id) public view virtual
returns (uint256) {
require(_owner != address(0),
"Ix07");
return balances[_id][_owner];
}
function balanceOf(address _owner) public override view virtual
returns (uint256) {
require(_owner != address(0),
"Ix08");
return totalBalances[_owner];
}
/**
Retrieve in a single call the balances of some mulitple particular token
`_ids` held by corresponding `_owners`.
@param _owners The owners to check for token balances.
@param _ids The IDs of tokens to check for balances.
@return the amount of each token owned by each owner.
*/
function balanceOfBatch(address[] calldata _owners, uint256[] calldata _ids)
external view virtual returns (uint256[] memory) {
require(_owners.length == _ids.length, "");
// Populate and return an array of balances.
uint256[] memory batchBalances = new uint256[](_owners.length);
for (uint256 i = 0; i < _owners.length; ++i) {
batchBalances[i] = balanceOfGroup(_owners[i], _ids[i]);
}
return batchBalances;
}
/**
This function returns true if `_operator` is approved to transfer items
owned by `_owner`. This approval check features an override to explicitly
whitelist any addresses delegated in the proxy registry.
@param _owner The owner of items to check for transfer ability.
@param _operator The potential transferrer of `_owner`'s items.
@return Whether `_operator` may transfer items owned by `_owner`.
*/
function isApprovedForAll(address _owner, address _operator) public override
view virtual returns (bool) {
StubProxyRegistry proxyRegistry = StubProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(_owner)) == _operator) {
return true;
}
// We did not find an explicit whitelist in the proxy registry.
return operatorApprovals[_owner][_operator];
}
/**
Enable or disable approval for a third party `_operator` address to manage
(transfer or burn) all of the caller's tokens.
@param _operator The address to grant management rights over all of the
caller's tokens.
@param _approved The status of the `_operator`'s approval for the caller.
*/
function setApprovalForAll(address _operator, bool _approved) external
override virtual {
require(_msgSender() != _operator,
"Ix09");
operatorApprovals[_msgSender()][_operator] = _approved;
emit ApprovalForAll(_msgSender(), _operator, _approved);
}
/**
This private helper function converts a number into a single-element array.
@param _element The element to convert to an array.
@return The array containing the single `_element`.
*/
function _asSingletonArray(uint256 _element) private pure
returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = _element;
return array;
}
/**
An inheritable and configurable pre-transfer hook that can be overridden.
It fires before any token transfer, including mints and burns.
@param _operator The caller who triggers the token transfer.
@param _from The address to transfer tokens from.
@param _to The address to transfer tokens to.
@param _ids The specific token IDs to transfer.
@param _amounts The amounts of the specific `_ids` to transfer.
@param _data Additional call data to send with this transfer.
*/
function _beforeTokenTransfer(address _operator, address _from, address _to,
uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
internal virtual {
}
/**
ERC-721 dictates that any contract which wishes to receive ERC-721 tokens
must explicitly designate itself as such. This function checks for such
designation to prevent undesirable token transfers.
@param _operator The caller who triggers the token transfer.
@param _from The address to transfer tokens from.
@param _to The address to transfer tokens to.
@param _id The specific token ID to transfer.
@param _data Additional call data to send with this transfer.
*/
function _doSafeTransferAcceptanceCheck(address _operator, address _from,
address _to, uint256 _id, bytes memory _data) private {
if (_to.isContract()) {
try IERC721Receiver(_to).onERC721Received(_operator, _from, _id,
_data) returns (bytes4 response) {
if (response != IERC721Receiver(_to).onERC721Received.selector) {
revert("Ix09");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("Ix10");
}
}
}
/**
Transfer on behalf of a caller or one of their authorized token managers
items from one address to another.
@param _from The address to transfer tokens from.
@param _to The address to transfer tokens to.
@param _id The specific token ID to transfer.
@param _data Additional call data to send with this transfer.
*/
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
_safeTransferFrom(from, to, tokenId, bytes(""));
}
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data)
public virtual override {
_safeTransferFrom(from, to, tokenId, data);
}
function _safeTransferFrom(address _from, address _to, uint256 _id,
bytes memory _data) internal virtual {
require(_to != address(0),
"Ix11");
require(_from == _msgSender() || isApprovedForAll(_from, _msgSender()),
"Ix12");
// Validate transfer safety and send tokens away.
address operator = _msgSender();
_beforeTokenTransfer(operator, _from, _to, _asSingletonArray(_id),
_asSingletonArray(1), _data);
// Retrieve the item's group ID.
uint256 shiftedGroupId = (_id & GROUP_MASK);
uint256 groupId = shiftedGroupId >> 128;
// Update all specially-tracked group-specific balances.
require(balances[_id][_from] >= 1, "Ix13");
balances[_id][_from] = balances[_id][_from] - 1;
balances[_id][_to] = balances[_id][_to] + 1;
groupBalances[groupId][_from] = groupBalances[groupId][_from] - 1;
groupBalances[groupId][_to] = groupBalances[groupId][_to] + 1;
totalBalances[_from] = totalBalances[_from] - 1;
totalBalances[_to] = totalBalances[_to] + 1;
_holderTokens[_from].remove(_id);
_holderTokens[_to].add(_id);
_tokenOwners.set(_id, _to);
// Emit the transfer event and perform the safety check.
emit Transfer(_from, _to, _id);
_doSafeTransferAcceptanceCheck(operator, _from, _to, _id, _data);
}
/**
Transfer on behalf of a caller or one of their authorized token managers
items from one address to another.
@param _from The address to transfer tokens from.
@param _to The address to transfer tokens to.
@param _ids The specific token IDs to transfer.
@param _data Additional call data to send with this transfer.
*/
function safeBatchTransferFrom(address _from, address _to,
uint256[] memory _ids, bytes memory _data)
external virtual {
require(_to != address(0),
"Ix14");
require(_from == _msgSender() || isApprovedForAll(_from, _msgSender()),
"Ix15");
// Validate transfer and perform all batch token sends.
_beforeTokenTransfer(_msgSender(), _from, _to, _ids, _asSingletonArray(1), _data);
for (uint256 i = 0; i < _ids.length; ++i) {
// Retrieve the item's group ID.
uint256 groupId = (_ids[i] & GROUP_MASK) >> 128;
// Update all specially-tracked group-specific balances.
require(balances[_ids[i]][_from] >= 1, "Ix16");
balances[_ids[i]][_from] = balances[_ids[i]][_from] - 1;
balances[_ids[i]][_to] = balances[_ids[i]][_to] + 1;
groupBalances[groupId][_from] = groupBalances[groupId][_from] - 1;
groupBalances[groupId][_to] = groupBalances[groupId][_to] + 1;
totalBalances[_from] = totalBalances[_from] - 1;
totalBalances[_to] = totalBalances[_to] + 1;
// Emit the transfer event and perform the safety check.
emit Transfer(_from, _to, _ids[i]);
_doSafeTransferAcceptanceCheck(_msgSender(), _from, _to, _ids[i], _data);
}
}
/**
Create a new NFT item group or configure an existing one. NFTs within a
group share a group ID in the upper 128-bits of their full item ID.
Within a group NFTs can be distinguished for the purposes of serializing
issue numbers.
@param _groupId The ID of the item group to create or configure.
@param _data The `ItemGroup` data input.
*/
function configureGroup(uint256 _groupId, ItemGroupInput memory _data)
external virtual hasItemRight(_groupId, CONFIGURE_GROUP) {
require(_groupId != 0,
"Ix17");
// If the collection is not locked, we may add a new item group.
if (!itemGroups[_groupId].initialized) {
require(!locked,
"Ix18");
itemGroups[_groupId] = ItemGroup({
initialized: true,
name: _data.name,
supplyType: _data.supplyType,
supplyData: _data.supplyData,
burnType: _data.burnType,
burnData: _data.burnData,
circulatingSupply: 0,
mintCount: 0,
burnCount: 0
});
// Edit an existing item group. The name may always be updated.
} else {
itemGroups[_groupId].name = _data.name;
// A capped supply type may not change.
// It may also not have its cap increased.
if (itemGroups[_groupId].supplyType == SupplyType.Capped) {
require(_data.supplyType == SupplyType.Capped,
"Ix19");
require(_data.supplyData <= itemGroups[_groupId].supplyData,
"Ix20");
// The flexible and uncapped types may freely change.
} else {
itemGroups[_groupId].supplyType = _data.supplyType;
}
// Item supply data may not be reduced below the circulating supply.
require(_data.supplyData >= itemGroups[_groupId].circulatingSupply,
"Ix21");
itemGroups[_groupId].supplyData = _data.supplyData;
// do we want burnType to be updateable?
}
// Emit the configuration event.
emit ItemGroupConfigured(_msgSender(), _groupId, _data);
}
/**
This is a private helper function to replace the `hasItemRight` modifier
that we use on some functions in order to inline this check during batch
minting and burning.
@param _id The ID of the item to check for the given `_right` on.
@param _right The right that the caller is trying to exercise on `_id`.
@return Whether or not the caller has a valid right on this item.
*/
function _hasItemRight(uint256 _id, bytes32 _right) private view
returns (bool) {
uint256 groupId = (_id & GROUP_MASK) >> 128;
if (_msgSender() == owner()) {
return true;
} else if (hasRight(_msgSender(), UNIVERSAL, _right)) {
return true;
} else if (hasRight(_msgSender(), bytes32(groupId), _right)) {
return true;
} else if (hasRight(_msgSender(), bytes32(_id), _right)) {
return true;
} else {
return false;
}
}
/**
This is a private helper function to verify, according to all of our various
minting and burning rules, whether it would be valid to mint a particular
item `_id`.
@param _id The ID of the item to check for minting validity.
@return The ID of the item that should be minted.
*/
function _mintChecker(uint256 _id) private view returns (uint256) {
// Retrieve the item's group ID.
uint256 shiftedGroupId = (_id & GROUP_MASK);
uint256 groupId = shiftedGroupId >> 128;
// console.logUint(groupId);
require(itemGroups[groupId].initialized,
"Ix22");
// If false, owned by address (or NULL_ADDRESS i.e, was burnable)
// If true, never minted, (or was removed i.e, was replenishable)
require(!_tokenOwners.contains(_id),
"Ix23");
// If we can replenish burnt items, then only our currently-circulating
// supply matters. Otherwise, historic mints are what determine the cap.
uint256 currentGroupSupply = itemGroups[groupId].mintCount;
uint256 currentItemSupply = mintCount[_id];
if (itemGroups[groupId].burnType == BurnType.Replenishable) {
currentGroupSupply = itemGroups[groupId].circulatingSupply;
currentItemSupply = circulatingSupply[_id];
}
// If we are subject to a cap on group size, ensure we don't exceed it.
if (itemGroups[groupId].supplyType != SupplyType.Uncapped) {
require(currentGroupSupply + 1 <= itemGroups[groupId].supplyData,
"Ix24");
}
return _id;
}
/**
Mint a batch of tokens into existence and send them to the `_recipient`
address. In order to mint an item, its item group must first have been
created. Minting an item must obey both the fungibility and size cap of its
group.
@param _recipient The address to receive all NFTs within the newly-minted
group.
@param _ids The item IDs for the new items to create.
@param _data Any associated data to use on items minted in this transaction.
*/
function mintBatch(address _recipient, uint256[] memory _ids,
bytes memory _data)
public virtual {
require(_recipient != address(0), "Super721::mintBatch: mint to the zero address");
// Validate and perform the mint.
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), _recipient, _ids, _asSingletonArray(1),
_data);
// Loop through each of the batched IDs to update storage of special
// balances and circulation balances.
for (uint256 i = 0; i < _ids.length; i++) {
require(_hasItemRight(_ids[i], MINT),
"Ix25");
// Retrieve the group ID from the given item `_id` and check mint.
uint256 shiftedGroupId = (_ids[i] & GROUP_MASK);
uint256 groupId = shiftedGroupId >> 128;
uint256 mintedItemId = _mintChecker(_ids[i]);
// Update storage of special balances and circulating values.
balances[mintedItemId][_recipient] = balances[mintedItemId][_recipient] + 1;
groupBalances[groupId][_recipient] = groupBalances[groupId][_recipient] + 1;
totalBalances[_recipient] = totalBalances[_recipient] + 1;
mintCount[mintedItemId] = mintCount[mintedItemId] + 1;
circulatingSupply[mintedItemId] = circulatingSupply[mintedItemId] + 1;
itemGroups[groupId].mintCount = itemGroups[groupId].mintCount + 1;
itemGroups[groupId].circulatingSupply =
itemGroups[groupId].circulatingSupply + 1;
//_holderTokens[address(0)].remove(_ids[i]);
_holderTokens[_recipient].add(_ids[i]);
_tokenOwners.set(_ids[i], _recipient);
// Emit event and handle the safety check.
emit Transfer(address(0), _recipient, _ids[i]);
_doSafeTransferAcceptanceCheck(operator, address(0), _recipient, _ids[i], _data);
}
}
/**
The special, IMX-privileged minting function for centralized L2 support.
*/
function mintFor(address _to, uint256 quantity, bytes calldata _blueprint) external {
// check
require(_msgSender() == imxCoreAddress, "Ix26");
require(quantity == 1, "Ix27");
require(!ISuper721IMXLock(super721IMXLock).mintForLocked(), "Ix28");
// read data
(uint256 id, bytes memory metadata_) = Utils.split(_blueprint);
uint256[] memory ids = _asSingletonArray(id);
// effects
if(metadata_.length > 0){
blueprints[id] = string(metadata_);
}
mintBatch(_to, ids, _blueprint);
}
/**
This is a private helper function to verify, according to all of our various
minting and burning rules, whether it would be valid to burn some `_amount`
of a particular item `_id`.
@param _id The ID of the item to check for burning validity.
@return The ID of the item that should have `_amount` burnt for it.
*/
function _burnChecker(uint256 _id) private view
returns (uint256) {
// Retrieve the item's group ID.
uint256 shiftedGroupId = (_id & GROUP_MASK);
uint256 groupId = shiftedGroupId >> 128;
require(itemGroups[groupId].initialized,
"Ix29");
// If the item group is non-burnable, then revert.
if (itemGroups[groupId].burnType == BurnType.None) {
revert("Ix30");
}
// If we can burn items, then we must verify that we do not exceed the cap.
else if (itemGroups[groupId].burnType == BurnType.Burnable) {
require(itemGroups[groupId].burnCount + 1
<= itemGroups[groupId].burnData,
"Ix31");
}
// If the item is replenishable, then ignore checks
uint256 burntItemId = _id;
return burntItemId;
}
/**
This function allows an address to destroy some of its items.
@param _burner The address whose item is burning.
@param _id The item ID to burn.
@param _amount The amount of the corresponding item ID to burn.
*/
// function burn(address _burner, uint256 _id, uint256 _amount)
// external virtual hasItemRight(_id, BURN) {
// require(_burner != address(0),
// "Super721::burn: burn from the zero address");
//
// // Retrieve the group ID from the given item `_id` and check burn validity.
// uint256 shiftedGroupId = (_id & GROUP_MASK);
// uint256 groupId = shiftedGroupId >> 128;
// uint256 burntItemId = _burnChecker(_id, _amount);
//
// // Validate and perform the burn.
// address operator = _msgSender();
// _beforeTokenTransfer(operator, _burner, address(0),
// _asSingletonArray(burntItemId), _asSingletonArray(_amount), "");
//
// // Update storage of special balances and circulating values.
// balances[burntItemId][_burner] = balances[burntItemId][_burner]
// .sub(_amount,
// "Super721::burn: burn amount exceeds balance");
// groupBalances[groupId][_burner] = groupBalances[groupId][_burner]
// .sub(_amount);
// totalBalances[_burner] = totalBalances[_burner].sub(_amount);
// burnCount[burntItemId] = burnCount[burntItemId].add(_amount);
// circulatingSupply[burntItemId] = circulatingSupply[burntItemId]
// .sub(_amount);
// itemGroups[groupId].burnCount = itemGroups[groupId].burnCount.add(_amount);
// itemGroups[groupId].circulatingSupply =
// itemGroups[groupId].circulatingSupply.sub(_amount);
//
// // Emit the burn event.
// emit Transfer(operator, address(0), _id);
// }
/**
This function allows an address to destroy multiple different items in a
single call.
@param _burner The address whose items are burning.
@param _ids The item IDs to burn.
*/
function burnBatch(address _burner, uint256[] memory _ids) external virtual {
require(_burner != address(0), "Super721::burnBatch: burn from the zero address");
// Validate and perform the burn.
address operator = _msgSender();
_beforeTokenTransfer(operator, _burner, address(0), _ids, _asSingletonArray(1), "");
// Loop through each of the batched IDs to update storage of special
// balances and circulation balances.
for (uint i = 0; i < _ids.length; i++) {
require(_hasItemRight(_ids[i], BURN),
"Ix32");
// Retrieve the group ID from the given item `_id` and check burn.
uint256 shiftedGroupId = (_ids[i] & GROUP_MASK);
uint256 groupId = shiftedGroupId >> 128;
uint256 burntItemId = _burnChecker(_ids[i]);
// Update storage of special balances and circulating values.
require(balances[burntItemId][_burner] >= 1, "Ix33");
balances[burntItemId][_burner] = balances[burntItemId][_burner] - 1;
groupBalances[groupId][_burner] = groupBalances[groupId][_burner] - 1;
totalBalances[_burner] = totalBalances[_burner] - 1;
burnCount[burntItemId] = burnCount[burntItemId] + 1;
circulatingSupply[burntItemId] = circulatingSupply[burntItemId] - 1;
itemGroups[groupId].burnCount = itemGroups[groupId].burnCount + 1;
itemGroups[groupId].circulatingSupply =
itemGroups[groupId].circulatingSupply - 1;
_holderTokens[_burner].remove(_ids[i]);
_holderTokens[address(0)].add(_ids[i]);
// If burnType is None, burnChecker will revert that
if(itemGroups[groupId].burnType == BurnType.Burnable)
_tokenOwners.set(_ids[i], address(0));
else
_tokenOwners.remove(_ids[i]);
// Emit the burn event.
emit Transfer(operator, address(0), _ids[i]);
}
}
function metadata(uint256 id)
external view
returns(string memory)
{
return blueprints[id];
}
/**
Set the on-chain metadata attached to a specific token ID so long as the
collection as a whole or the token specifically has not had metadata
editing frozen.
@param _id The ID of the token to set the `_metadata` for.
@param _metadata The metadata string to store on-chain.
*/
function setMetadata(uint256 _id, string memory _metadata)
external hasItemRight(_id, SET_METADATA) {
uint groupId = _id >> 128;
require(!uriLocked && !metadataFrozen[_id] && !metadataFrozen[groupId]);
string memory oldMetadata = blueprints[_id];
blueprints[_id] = _metadata;
emit MetadataChanged(_msgSender(), _id, oldMetadata, _metadata);
}
/**
Allow the item collection owner or an associated manager to forever lock the
metadata URI on the entire collection to future changes.
*/
function lockURI() external
hasValidPermit(UNIVERSAL, LOCK_URI) {
uriLocked = true;
emit PermanentURI(metadataUri, 2 ** 256 - 1);
}
/**
Allow the associated manager to forever lock the contract URI to future
changes
*/
function lockContractUri() external
hasValidPermit(UNIVERSAL, LOCK_URI) {
contractUriLocked = true;
emit PermanentContractURI(contractURI, 2 ** 256 - 1);
}
/**
Allow the item collection owner or an associated manager to forever lock the
metadata URI on an item to future changes.
@param _uri The value of the URI to lock for `_id`.
@param _id The token ID to lock a metadata URI value into.
*/
function lockItemURI(string calldata _uri, uint256 _id) external
hasItemRight(_id, LOCK_ITEM_URI) {
metadataFrozen[_id] = true;
emit PermanentURI(_uri, _id);
}
/**
Allow the item collection owner or an associated manager to forever lock the
metadata URI on a group of items to future changes.
@param _uri The value of the URI to lock for `groupId`.
@param groupId The group ID to lock a metadata URI value into.
*/
function lockGroupURI(string calldata _uri, uint256 groupId) external
hasItemRight(groupId, LOCK_ITEM_URI) {
metadataFrozen[groupId] = true;
emit PermanentURI(_uri, groupId);
}
/**
Allow the item collection owner or an associated manager to forever lock
this contract to further item minting.
*/
function lock() external virtual hasValidPermit(UNIVERSAL, LOCK_CREATION) {
locked = true;
emit CollectionLocked(_msgSender());
}
function getApproved(uint256 tokenId) public view override returns (address) {
require(_tokenOwners.contains(tokenId), "Ix34");
return _tokenApprovals[tokenId];
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
require(_tokenOwners.contains(tokenId), "Ix35");
address owner = ownerOf(tokenId);
return (spender == owner || _tokenApprovals[tokenId] == spender || isApprovedForAll(owner, spender));
}
/**
* @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), "Ix36");
safeTransferFrom(from, to, tokenId);
//
// require(ownerOf(tokenId) == from, "Super721::transferForm: transfer of token that is not own");
// require(to != address(0), "Super721::transferForm: transfer to the zero address");
//
// _beforeTokenTransfer(_msgSender(), from, to, _asSingletonArray(tokenId), _asSingletonArray(1), "");
//
// // Clear approvals from the previous owner
// //_approve(address(0), tokenId);
// _tokenApprovals[tokenId] = address(0);
// emit Approval(ownerOf(tokenId), address(0), tokenId);
//
// _holderTokens[from].remove(tokenId);
// _holderTokens[to].add(tokenId);
//
// _tokenOwners.set(tokenId, to);
//
// emit Transfer(from, to, tokenId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view 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 returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
}
// 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 "../../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 "./ERC165.sol";
/**
* @dev Storage based implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165Storage is ERC165 {
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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;
import "./EnumerableSet.sol";
/**
* @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 {
using EnumerableSet for EnumerableSet.Bytes32Set;
// 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 Map {
// Storage of keys
EnumerableSet.Bytes32Set _keys;
mapping(bytes32 => bytes32) _values;
}
/**
* @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) {
map._values[key] = value;
return map._keys.add(key);
}
/**
* @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) {
delete map._values[key];
return map._keys.remove(key);
}
/**
* @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._keys.contains(key);
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._keys.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) {
bytes32 key = map._keys.at(index);
return (key, map._values[key]);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
bytes32 value = map._values[key];
if (value == bytes32(0)) {
return (_contains(map, key), bytes32(0));
} else {
return (true, 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) {
bytes32 value = map._values[key];
require(value != 0 || _contains(map, key), "EnumerableMap: nonexistent key");
return value;
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(
Map storage map,
bytes32 key,
string memory errorMessage
) private view returns (bytes32) {
bytes32 value = map._values[key];
require(value != 0 || _contains(map, key), errorMessage);
return value;
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(
UintToAddressMap storage map,
uint256 key,
address value
) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element stored at position `index` in the set. O(1).
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryGet}.
*/
function get(
UintToAddressMap storage map,
uint256 key,
string memory errorMessage
) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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 ^0.8.8;
library Utils {
// this is struct for aligning function memory
struct Slice {
uint length;
uint pointer;
}
function Concat(string memory _a, string memory _b, string memory _c, string memory _d, string memory _e)
internal pure
returns (string memory)
{
bytes memory _ba = bytes(_a);
bytes memory _bb = bytes(_b);
bytes memory _bc = bytes(_c);
bytes memory _bd = bytes(_d);
bytes memory _be = bytes(_e);
string memory abcde = new string(_ba.length + _bb.length + _bc.length + _bd.length + _be.length);
bytes memory babcde = bytes(abcde);
uint k = 0;
for (uint i = 0; i < _ba.length; i++) babcde[k++] = _ba[i];
for (uint i = 0; i < _bb.length; i++) babcde[k++] = _bb[i];
for (uint i = 0; i < _bc.length; i++) babcde[k++] = _bc[i];
for (uint i = 0; i < _bd.length; i++) babcde[k++] = _bd[i];
for (uint i = 0; i < _be.length; i++) babcde[k++] = _be[i];
return string(babcde);
}
function Concat(string memory _a, string memory _b, string memory _c, string memory _d)
internal pure
returns (string memory)
{
return Concat(_a, _b, _c, _d, "");
}
function Concat(string memory _a, string memory _b, string memory _c)
internal pure
returns (string memory)
{
return Concat(_a, _b, _c, "", "");
}
function Concat(string memory _a, string memory _b)
internal pure
returns (string memory)
{
return Concat(_a, _b, "", "", "");
}
function uint2str(uint _i)
internal pure
returns (string memory _uintAsString)
{
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint k = len;
j = _i;
while (j != 0) {
bstr[--k] = bytes1(uint8(48 + j % 10));
j /= 10;
}
return string(bstr);
}
function copyToMemory(uint _destination, uint _source, uint _length)
private pure
{
// Copy word-length chunks while possible
for(_length ; _length >= 32; _length -= 32) {
assembly {
mstore(_destination, mload(_source))
}
_destination += 32;
_source += 32;
}
// Copy remaining bytes
if(_length >0){
uint mask = 256 ** (32 - _length) - 1;
assembly {
let source := and(mload(_source), not(mask))
let destination := and(mload(_destination), mask)
mstore(_destination, or(destination, source))
}
}
}
// make struct slice out of string
function toSlice(string memory input)
internal pure
returns (Slice memory)
{
uint ptr;
assembly {
ptr := add(input, 0x20)
}
return Slice(bytes(input).length, ptr);
}
function findPointer(uint inputLength, uint inputPointer, uint toSearchLength, uint toSearchPointer)
private pure
returns (uint)
{
uint pointer = inputPointer;
if (toSearchLength <= inputLength) {
if (toSearchLength <= 32) {
bytes32 mask = bytes32(~(2 ** (8 * (32 - toSearchLength)) - 1));
bytes32 toSearchdata;
assembly { toSearchdata := and(mload(toSearchPointer), mask) }
uint end = inputPointer + inputLength - toSearchLength;
bytes32 data;
assembly { data := and(mload(pointer), mask) }
while (data != toSearchdata) {
if (pointer >= end)
return inputPointer + inputLength;
pointer++;
assembly { data := and(mload(pointer), mask) }
}
return pointer;
} else {
// For long toSearchs, use hashing
bytes32 hash;
assembly { hash := keccak256(toSearchPointer, toSearchLength) }
for (uint i = 0; i <= inputLength - toSearchLength; i++) {
bytes32 testHash;
assembly { testHash := keccak256(pointer, toSearchLength) }
if (hash == testHash)
return pointer;
pointer += 1;
}
}
}
return inputPointer + inputLength;
}
function afterMatch(Slice memory input, Slice memory toSearch)
internal pure
returns (Slice memory)
{
uint pointer = findPointer(input.length, input.pointer, toSearch.length, toSearch.pointer);
input.length -= pointer - input.pointer + 1; // escape void space
input.pointer = pointer +1; // escape token
return input;
}
function beforeMatch(Slice memory input, Slice memory toSearch)
internal pure
returns (Slice memory token)
{
beforeMatch(input, toSearch, token);
}
function beforeMatch(Slice memory input, Slice memory toSearch, Slice memory token)
internal pure
returns (Slice memory)
{
uint pointer = findPointer(input.length, input.pointer, toSearch.length, toSearch.pointer);
token.pointer = input.pointer;
token.length = pointer - input.pointer;
if (pointer == input.pointer + input.length) {
// Not found
input.length = 0;
} else {
input.length -= token.length + toSearch.length;
input.pointer = pointer + toSearch.length;
}
return token;
}
function toString(Slice memory input)
internal pure
returns (string memory)
{
string memory result = new string(input.length);
uint resultPointer;
assembly { resultPointer := add(result, 32) }
copyToMemory(resultPointer, input.pointer, input.length);
return result;
}
function split(bytes calldata blob)
internal
pure
returns (uint256, bytes memory)
{
int256 index = indexOf(blob, ":", 0);
require(index >= 0, "Separator must exist");
// Trim the { and } from the parameters
uint256 tokenID = toUint(blob[1:uint256(index) - 1]);
uint256 blueprintLength = blob.length - uint256(index) - 3;
if (blueprintLength == 0) {
return (tokenID, bytes(""));
}
bytes calldata blueprint = blob[uint256(index) + 2:blob.length - 1];
return (tokenID, blueprint);
}
/**
* Index Of
*
* Locates and returns the position of a character within a string starting
* from a defined offset
*
* @param _base When being used for a data type this is the extended object
* otherwise this is the string acting as the haystack to be
* searched
* @param _value The needle to search for, at present this is currently
* limited to one character
* @param _offset The starting point to start searching from which can start
* from 0, but must not exceed the length of the string
* @return int The position of the needle starting from 0 and returning -1
* in the case of no matches found
*/
function indexOf(
bytes memory _base,
string memory _value,
uint256 _offset
) internal pure returns (int256) {
bytes memory _valueBytes = bytes(_value);
assert(_valueBytes.length == 1);
for (uint256 i = _offset; i < _base.length; i++) {
if (_base[i] == _valueBytes[0]) {
return int256(i);
}
}
return -1;
}
function toUint(bytes memory b) internal pure returns (uint256) {
uint256 result = 0;
for (uint256 i = 0; i < b.length; i++) {
uint256 val = uint256(uint8(b[i]));
if (val >= 48 && val <= 57) {
result = result * 10 + (val - 48);
}
}
return result;
}
function interpolate(string memory source, uint value) internal pure returns (string memory result){
Slice memory slice1 = toSlice(source);
Slice memory slice2 = toSlice(source);
string memory tokenFirst = "{";
string memory tokenLast = "}";
Slice memory firstSlice = toSlice(tokenFirst);
Slice memory secondSlice = toSlice(tokenLast);
firstSlice = beforeMatch(slice1, firstSlice);
secondSlice = afterMatch(slice2, secondSlice);
string memory first = toString(firstSlice);
string memory second = toString(secondSlice);
result = Concat(first, uint2str(value), second);
return result;
}
}
/**
* @title ArrayUtils
* @author Project Wyvern Developers
*/
library ArrayUtils {
/**
* Replace bytes in an array with bytes in another array, guarded by a bitmask
* Efficiency of this function is a bit unpredictable because of the EVM's word-specific model (arrays under 32 bytes will be slower)
*
* @dev Mask must be the size of the byte array. A nonzero byte means the byte array can be changed.
* @param array The original array
* @param desired The target array
* @param mask The mask specifying which bits can be changed
*/
function guardedArrayReplace(bytes memory array, bytes memory desired, bytes memory mask)
internal pure
{
require(array.length == desired.length, "Ux02");
require(array.length == mask.length, "Ux03");
uint words = array.length / 0x20;
uint index = words * 0x20;
assert(index / 0x20 == words);
uint i;
for (i = 0; i < words; i++) {
/* Conceptually: array[i] = (!mask[i] && array[i]) || (mask[i] && desired[i]), bitwise in word chunks. */
assembly {
let commonIndex := mul(0x20, add(1, i))
let maskValue := mload(add(mask, commonIndex))
mstore(add(array, commonIndex), or(and(not(maskValue), mload(add(array, commonIndex))), and(maskValue, mload(add(desired, commonIndex)))))
}
}
/* Deal with the last section of the byte array. */
if (words > 0) {
/* This overlaps with bytes already set but is still more efficient than iterating through each of the remaining bytes individually. */
i = words;
assembly {
let commonIndex := mul(0x20, add(1, i))
let maskValue := mload(add(mask, commonIndex))
mstore(add(array, commonIndex), or(and(not(maskValue), mload(add(array, commonIndex))), and(maskValue, mload(add(desired, commonIndex)))))
}
} else {
/* If the byte array is shorter than a word, we must unfortunately do the whole thing bytewise.
(bounds checks could still probably be optimized away in assembly, but this is a rare case) */
for (i = index; i < array.length; i++) {
array[i] = ((mask[i] ^ 0xff) & array[i]) | (mask[i] & desired[i]);
}
}
}
/**
* Test if two arrays are equal
* Source: https://github.com/GNSPS/solidity-bytes-utils/blob/master/contracts/BytesLib.sol
*
* @dev Arrays must be of equal length, otherwise will return false
* @param a First array
* @param b Second array
* @return Whether or not all bytes in the arrays are equal
*/
function arrayEq(bytes memory a, bytes memory b)
internal pure
returns (bool)
{
bool success = true;
assembly {
let length := mload(a)
// if lengths don't match the arrays are not equal
switch eq(length, mload(b))
case 1 {
// cb is a circuit breaker in the for loop since there's
// no said feature for inline assembly loops
// cb = 1 - don't breaker
// cb = 0 - break
let cb := 1
let mc := add(a, 0x20)
let end := add(mc, length)
for {
let cc := add(b, 0x20)
// the next line is the loop condition:
// while(uint(mc < end) + cb == 2)
} eq(add(lt(mc, end), cb), 2) {
mc := add(mc, 0x20)
cc := add(cc, 0x20)
} {
// if any of these checks fails then arrays are not equal
if iszero(eq(mload(mc), mload(cc))) {
// unsuccess:
success := 0
cb := 0
}
}
}
default {
// unsuccess:
success := 0
}
}
return success;
}
/**
* Unsafe write byte array into a memory location
*
* @param index Memory location
* @param source Byte array to write
* @return End memory index
*/
function unsafeWriteBytes(uint index, bytes memory source)
internal pure
returns (uint)
{
if (source.length > 0) {
assembly {
let length := mload(source)
let end := add(source, add(0x20, length))
let arrIndex := add(source, 0x20)
let tempIndex := index
for { } eq(lt(arrIndex, end), 1) {
arrIndex := add(arrIndex, 0x20)
tempIndex := add(tempIndex, 0x20)
} {
mstore(tempIndex, mload(arrIndex))
}
index := add(index, length)
}
}
return index;
}
/**
* Unsafe write address array into a memory location
*
* @param index Memory location
* @param source Address array to write
* @return End memory index
*/
function unsafeWriteUintArray(uint index, uint[] memory source)
internal pure
returns (uint)
{
for (uint i = 0; i < source.length; i++){
uint conv = uint(uint160(source[i])) << 0x60;
assembly {
mstore(index, conv)
index := add(index, 0x14)
}
}
return index;
}
/**
* Unsafe write address nested array into a memory location
*
* @param index Memory location
* @param source Address nested array to write
* @return End memory index
*/
function unsafeWriteAddressMap(uint index, address[][] memory source)
internal pure
returns (uint)
{
for (uint i = 0; i < source.length; i++){
for (uint j = 0; j < source[i].length; j++){
uint conv = uint(uint160(source[i][j])) << 0x60;
assembly {
mstore(index, conv)
index := add(index, 0x14)
}
}
}
return index;
}
/**
* Unsafe write address into a memory location
*
* @param index Memory location
* @param source Address to write
* @return End memory index
*/
function unsafeWriteAddress(uint index, address source)
internal pure
returns (uint)
{
uint conv = uint(uint160(source)) << 0x60;
assembly {
mstore(index, conv)
index := add(index, 0x14)
}
return index;
}
/**
* Unsafe write uint into a memory location
*
* @param index Memory location
* @param source uint to write
* @return End memory index
*/
function unsafeWriteUint(uint index, uint source)
internal pure
returns (uint)
{
assembly {
mstore(index, source)
index := add(index, 0x20)
}
return index;
}
/**
* Unsafe write uint8 into a memory location
*
* @param index Memory location
* @param source uint8 to write
* @return End memory index
*/
function unsafeWriteUint8(uint index, uint8 source)
internal pure
returns (uint)
{
assembly {
mstore8(index, source)
index := add(index, 0x1)
}
return index;
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.7;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
/**
@title An advanced permission-management contract.
@author Tim Clancy
This contract allows for a contract owner to delegate specific rights to
external addresses. Additionally, these rights can be gated behind certain
sets of circumstances and granted expiration times. This is useful for some
more finely-grained access control in contracts.
The owner of this contract is always a fully-permissioned super-administrator.
August 23rd, 2021.
*/
abstract contract PermitControl is Ownable {
using Address for address;
/// A special reserved constant for representing no rights.
bytes32 public constant ZERO_RIGHT = hex"00000000000000000000000000000000";
/// A special constant specifying the unique, universal-rights circumstance.
bytes32 public constant UNIVERSAL = hex"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF";
/*
A special constant specifying the unique manager right. This right allows an
address to freely-manipulate the `managedRight` mapping.
**/
bytes32 public constant MANAGER = hex"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF";
/**
A mapping of per-address permissions to the circumstances, represented as
an additional layer of generic bytes32 data, under which the addresses have
various permits. A permit in this sense is represented by a per-circumstance
mapping which couples some right, represented as a generic bytes32, to an
expiration time wherein the right may no longer be exercised. An expiration
time of 0 indicates that there is in fact no permit for the specified
address to exercise the specified right under the specified circumstance.
@dev Universal rights MUST be stored under the 0xFFFFFFFFFFFFFFFFFFFFFFFF...
max-integer circumstance. Perpetual rights may be given an expiry time of
max-integer.
*/
mapping( address => mapping( bytes32 => mapping( bytes32 => uint256 )))
public permissions;
/**
An additional mapping of managed rights to manager rights. This mapping
represents the administrator relationship that various rights have with one
another. An address with a manager right may freely set permits for that
manager right's managed rights. Each right may be managed by only one other
right.
*/
mapping( bytes32 => bytes32 ) public managerRight;
/**
An event emitted when an address has a permit updated. This event captures,
through its various parameter combinations, the cases of granting a permit,
updating the expiration time of a permit, or revoking a permit.
@param updator The address which has updated the permit.
@param updatee The address whose permit was updated.
@param circumstance The circumstance wherein the permit was updated.
@param role The role which was updated.
@param expirationTime The time when the permit expires.
*/
event PermitUpdated(
address indexed updator,
address indexed updatee,
bytes32 circumstance,
bytes32 indexed role,
uint256 expirationTime
);
/**
An event emitted when a management relationship in `managerRight` is
updated. This event captures adding and revoking management permissions via
observing the update history of the `managerRight` value.
@param manager The address of the manager performing this update.
@param managedRight The right which had its manager updated.
@param managerRight The new manager right which was updated to.
*/
event ManagementUpdated(
address indexed manager,
bytes32 indexed managedRight,
bytes32 indexed managerRight
);
/**
A modifier which allows only the super-administrative owner or addresses
with a specified valid right to perform a call.
@param _circumstance The circumstance under which to check for the validity
of the specified `right`.
@param _right The right to validate for the calling address. It must be
non-expired and exist within the specified `_circumstance`.
*/
modifier hasValidPermit(
bytes32 _circumstance,
bytes32 _right
) {
require(_msgSender() == owner()
|| hasRight(_msgSender(), _circumstance, _right),
"P1");
_;
}
/**
Return a version number for this contract's interface.
*/
function version() external virtual pure returns (uint256) {
return 1;
}
/**
Determine whether or not an address has some rights under the given
circumstance, and if they do have the right, until when.
@param _address The address to check for the specified `_right`.
@param _circumstance The circumstance to check the specified `_right` for.
@param _right The right to check for validity.
@return The timestamp in seconds when the `_right` expires. If the timestamp
is zero, we can assume that the user never had the right.
*/
function hasRightUntil(
address _address,
bytes32 _circumstance,
bytes32 _right
) public view returns (uint256) {
return permissions[_address][_circumstance][_right];
}
/**
Determine whether or not an address has some rights under the given
circumstance,
@param _address The address to check for the specified `_right`.
@param _circumstance The circumstance to check the specified `_right` for.
@param _right The right to check for validity.
@return true or false, whether user has rights and time is valid.
*/
function hasRight(
address _address,
bytes32 _circumstance,
bytes32 _right
) public view returns (bool) {
return permissions[_address][_circumstance][_right] > block.timestamp;
}
/**
Set the permit to a specific address under some circumstances. A permit may
only be set by the super-administrative contract owner or an address holding
some delegated management permit.
@param _address The address to assign the specified `_right` to.
@param _circumstance The circumstance in which the `_right` is valid.
@param _right The specific right to assign.
@param _expirationTime The time when the `_right` expires for the provided
`_circumstance`.
*/
function setPermit(
address _address,
bytes32 _circumstance,
bytes32 _right,
uint256 _expirationTime
) public virtual hasValidPermit(UNIVERSAL, managerRight[_right]) {
require(_right != ZERO_RIGHT,
"P2");
permissions[_address][_circumstance][_right] = _expirationTime;
emit PermitUpdated(_msgSender(), _address, _circumstance, _right,
_expirationTime);
}
/**
Set the `_managerRight` whose `UNIVERSAL` holders may freely manage the
specified `_managedRight`.
@param _managedRight The right which is to have its manager set to
`_managerRight`.
@param _managerRight The right whose `UNIVERSAL` holders may manage
`_managedRight`.
*/
function setManagerRight(
bytes32 _managedRight,
bytes32 _managerRight
) external virtual hasValidPermit(UNIVERSAL, MANAGER) {
require(_managedRight != ZERO_RIGHT,
"P3");
managerRight[_managedRight] = _managerRight;
emit ManagementUpdated(_msgSender(), _managedRight, _managerRight);
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.7;
/**
@title A proxy registry contract.
@author Protinam, Project Wyvern
@author Tim Clancy
This contract was originally developed by Project Wyvern
(https://github.com/ProjectWyvern/) where it currently enjoys great success as
a component of the primary exchange contract for OpenSea. It has been modified
to support a more modern version of Solidity with associated best practices.
The documentation has also been improved to provide more clarity.
*/
abstract contract StubProxyRegistry {
/**
This mapping relates an addresses to its own personal `OwnableDelegateProxy`
which allow it to proxy functionality to the various callers contained in
`authorizedCallers`.
*/
mapping(address => address) public proxies;
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.8;
interface ISuper721IMXLock {
function mintForLocked() external view returns(bool);
function toggleMintFor() 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);
}
// 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 "../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 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;
}
}
|
*/ function burn(address _burner, uint256 _id, uint256 _amount) external virtual hasItemRight(_id, BURN) { require(_burner != address(0), "Super721::burn: burn from the zero address"); Retrieve the group ID from the given item `_id` and check burn validity. uint256 shiftedGroupId = (_id & GROUP_MASK); uint256 groupId = shiftedGroupId >> 128; uint256 burntItemId = _burnChecker(_id, _amount); Validate and perform the burn. address operator = _msgSender(); _beforeTokenTransfer(operator, _burner, address(0), _asSingletonArray(burntItemId), _asSingletonArray(_amount), ""); Update storage of special balances and circulating values. balances[burntItemId][_burner] = balances[burntItemId][_burner] .sub(_amount, "Super721::burn: burn amount exceeds balance"); groupBalances[groupId][_burner] = groupBalances[groupId][_burner] .sub(_amount); totalBalances[_burner] = totalBalances[_burner].sub(_amount); burnCount[burntItemId] = burnCount[burntItemId].add(_amount); circulatingSupply[burntItemId] = circulatingSupply[burntItemId] .sub(_amount); itemGroups[groupId].burnCount = itemGroups[groupId].burnCount.add(_amount); itemGroups[groupId].circulatingSupply = itemGroups[groupId].circulatingSupply.sub(_amount); Emit the burn event. emit Transfer(operator, address(0), _id); }*/ Validate and perform the burn. Loop through each of the batched IDs to update storage of special balances and circulation balances. Retrieve the group ID from the given item `_id` and check burn. Update storage of special balances and circulating values. If burnType is None, burnChecker will revert that Emit the burn event.
|
This function allows an address to destroy some of its items.
@param _burner The address whose item is burning.
@param _id The item ID to burn.
@param _amount The amount of the corresponding item ID to burn.
This function allows an address to destroy multiple different items in a
single call.
@param _burner The address whose items are burning.
@param _ids The item IDs to burn.
function burnBatch(address _burner, uint256[] memory _ids) external virtual {
require(_burner != address(0), "Super721::burnBatch: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, _burner, address(0), _ids, _asSingletonArray(1), "");
for (uint i = 0; i < _ids.length; i++) {
require(_hasItemRight(_ids[i], BURN),
"Ix32");
uint256 shiftedGroupId = (_ids[i] & GROUP_MASK);
uint256 groupId = shiftedGroupId >> 128;
uint256 burntItemId = _burnChecker(_ids[i]);
require(balances[burntItemId][_burner] >= 1, "Ix33");
balances[burntItemId][_burner] = balances[burntItemId][_burner] - 1;
groupBalances[groupId][_burner] = groupBalances[groupId][_burner] - 1;
totalBalances[_burner] = totalBalances[_burner] - 1;
burnCount[burntItemId] = burnCount[burntItemId] + 1;
circulatingSupply[burntItemId] = circulatingSupply[burntItemId] - 1;
itemGroups[groupId].burnCount = itemGroups[groupId].burnCount + 1;
itemGroups[groupId].circulatingSupply =
itemGroups[groupId].circulatingSupply - 1;
_holderTokens[_burner].remove(_ids[i]);
_holderTokens[address(0)].add(_ids[i]);
if(itemGroups[groupId].burnType == BurnType.Burnable)
_tokenOwners.set(_ids[i], address(0));
else
_tokenOwners.remove(_ids[i]);
emit Transfer(operator, address(0), _ids[i]);
}
}
| 13,775,934
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./full_match/43113/0x8A493188A5E8F885c7b4Cab0f8F8B6c686A443A9/sources/JoeHatBondingCurve.sol
|
* @notice Calculates the required amount of $HAT to buy a given amount of AVAX with fees taken into account. @param avaxAmount - The amount of AVAX to buy. @return hatAmount - The amount of $HAT required./
|
function getHatAmountInForExactAvaxAmountOutWithFees(uint256 avaxAmount) public view returns (uint256) {
uint256 hatAmountWithFees = _getHatAmountInForExactAvaxAmountOut(avaxAmount * _b / _a);
require(getReserveHat() + hatAmountWithFees <= maxSupply, 'getHatAmountInForExactAvaxAmountOutWithFees: Not enough $HAT');
return hatAmountWithFees;
}
| 7,157,648
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./full_match/5/0x6Da7F63172653eea0b99B04Ce3404f92597459C0/sources/contracts/ERC721IA.sol
|
@dev Checks a request to claim NFTs against the active claim condition's criteria. uint256 _tokenId, if(isQueued(_tokenId)){ revert("token has already been claimed"); }
|
function verifyClaims(
address _claimer,
uint256 _quantity,
address _currency,
uint256 _pricePerToken,
AllowlistProof calldata _allowlistProof
) public view returns (bool isOverride) {
ClaimCondition memory currentClaimPhase = claimCondition;
uint256 claimLimit = currentClaimPhase.quantityLimitPerWallet;
uint256 claimPrice = currentClaimPhase.pricePerToken;
address claimCurrency = currentClaimPhase.currency;
uint256 _supplyClaimedByWallet = supplyClaimedByWallet[conditionId][
_claimer
];
if (currentClaimPhase.merkleRoot != bytes32(0)) {
(isOverride, ) = MerkleProof.verify(
_allowlistProof.proof,
currentClaimPhase.merkleRoot,
keccak256(
abi.encodePacked(
_claimer,
_allowlistProof.quantityLimitPerWallet,
_allowlistProof.pricePerToken,
_allowlistProof.currency
)
)
);
}
numClaimedForFree[_claimer] <
_allowlistProof.quantityLimitPerWallet)
? true
: false;
if (isActiveOverride) {
claimLimit = _allowlistProof.quantityLimitPerWallet != 0
? _allowlistProof.quantityLimitPerWallet
: claimLimit;
claimPrice = _allowlistProof.pricePerToken != type(uint256).max
? _allowlistProof.pricePerToken
: claimPrice;
claimCurrency = _allowlistProof.pricePerToken !=
type(uint256).max &&
_allowlistProof.currency != address(0)
? _allowlistProof.currency
: claimCurrency;
}
if (
_currency != claimCurrency ||
(_pricePerToken != claimPrice && !isActiveOverride)
) {
revert("!PriceOrCurrency");
}
if (
_quantity == 0 || (_quantity + _supplyClaimedByWallet > claimLimit)
) {
revert("!Qty");
}
if (
currentClaimPhase.supplyClaimed + _quantity >
currentClaimPhase.maxClaimableSupply
) {
revert("!MaxSupply");
}
if (currentClaimPhase.startTimestamp > block.timestamp) {
revert("cant claim yet");
}
}
| 1,863,008
|
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./partial_match/1/0xc39b13960D0B1BBD09FAB90969960f7a56e89E92/sources/Exchange.sol
|
address of a taker, if applies.
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address specificTaker;
| 3,714,713
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./full_match/4/0x50D7cB8eE3e347E22cB6210C1Ca57458EF1B59ec/sources/Users/lugondev/DEV/truffle-sample/contracts/TokenCrowdsale.sol
|
* @dev Determines how ETH is stored/forwarded on purchases./
|
function _forwardFunds(address payable _ref) internal {
uint256 weiAmount = msg.value;
uint256 refAmount = weiAmount.mul(5).div(100);
getRefReceiver(_ref).transfer(refAmount);
_wallet.transfer(weiAmount.sub(refAmount));
}
| 690,663
|
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// File: contracts\interfaces\IERC165.sol
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: contracts\interfaces\IERC721.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;
}
// File: contracts\interfaces\IERC721Receiver.sol
/**
* @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: contracts\interfaces\IERC721Metadata.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);
}
// File: contracts\libs\Address.sol
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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);
}
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: contracts\utils\Context.sol
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: contracts\libs\Strings.sol
/**
* @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: contracts\ERC165.sol
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: contracts\ERC721.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(to).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\utils\Ownable.sol
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_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);
}
}
// File: contracts\interfaces\IERC721Enumerable.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);
}
// File: contracts\ERC721Enumerable.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();
}
}
// File: contracts\interfaces\IDemonzv1.sol
interface IDemonzv1 is IERC721 {
function burnToken(uint256 _token_id) external;
}
// File: contracts\Demonzv2.sol
contract Demonzv2 is ERC721Enumerable, Ownable {
using Strings for uint256;
uint256 public MAX_TOKENS = 2000;
uint256 public MAX_PER_WALLET = 50;
uint256 public CURRENT_TOKEN_ID = 0; // for testing
string public BEGINNING_URI = "https://api.cryptodemonz.com/";
string public ENDING_URI = ".json";
bool public ALLOW_SACRIFCE = true;
IDemonzv1 public demonzv1;
constructor(address _demonzv1) ERC721 ("CryptoDemonzV2", "DEMONZv2") {
demonzv1 = IDemonzv1(_demonzv1);
}
modifier safeSacrificing {
require(ALLOW_SACRIFCE, "Sacrificing has not begun yet");
_;
}
event tokenSacrificed(address _sender);
/// @notice standard minting function
/// @param _amount to be minted
function mintToken(uint256 _amount) public onlyOwner {
require(totalSupply() + _amount <= MAX_TOKENS, "Not enough NFTs left to mint");
_batchMint(_amount, msg.sender);
}
/// @notice will mint demonzv2 for burning demonzv1
/// @param _ids array of demonzv1 ids to be burned
function burnV1(uint256[] memory _ids) external safeSacrificing {
uint256 i = 0;
require(_ids.length % 3 == 0 && _ids.length <= 9, "Invalid list");
require(totalSupply() + _ids.length <= MAX_TOKENS, "Not enough NFTs left to mint");
require(balanceOf(msg.sender) + _ids.length <= MAX_PER_WALLET, "Exceeds wallet max allowed balance");
for (i=0; i<_ids.length; ++i) {
require(demonzv1.ownerOf(_ids[i]) == msg.sender, "Sender is not owner");
demonzv1.safeTransferFrom(msg.sender, address(this), _ids[i]);
demonzv1.burnToken(_ids[i]);
}
_batchMint(_ids.length / 3, msg.sender);
// no need to increment token id here
emit tokenSacrificed(msg.sender);
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
return string(abi.encodePacked(BEGINNING_URI, tokenId.toString(), ENDING_URI));
}
function withdraw() external onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
function setBeginningURI(string memory _new_uri) external onlyOwner {
BEGINNING_URI = _new_uri;
}
function setEndingURI(string memory _new_uri) external onlyOwner {
ENDING_URI = _new_uri;
}
function toggleSacrifice() external onlyOwner {
ALLOW_SACRIFCE = !ALLOW_SACRIFCE;
}
function changeMaxPerWalletAmount(uint256 _amount) external onlyOwner {
MAX_PER_WALLET = _amount;
}
/// @notice dummy function for unit testing
function _incrementTokenId() internal {
++CURRENT_TOKEN_ID;
}
function _batchMint(uint256 _amount, address _sender) internal {
for (uint256 i=0; i<_amount; ++i) {
_safeMint(_sender, totalSupply());
_incrementTokenId();
}
}
/// @notice dummy function for unit testing
function getCurrentTokenId() view external returns (uint256) {
return CURRENT_TOKEN_ID;
}
/// @dev DO NOT FORMAT THIS TO PURE, even tho compiler is asking
function onERC721Received(
address,
address,
uint256,
bytes calldata
) external returns (bytes4) {
return
bytes4(
keccak256("onERC721Received(address,address,uint256,bytes)")
);
}
}
|
@notice dummy function for unit testing
|
function getCurrentTokenId() view external returns (uint256) {
return CURRENT_TOKEN_ID;
}
| 4,808,704
|
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pragma solidity ^0.4.24;
import '@gnosis.pm/gnosis-core-contracts/contracts/Oracles/FutarchyOracleFactory.sol';
import '@gnosis.pm/gnosis-core-contracts/contracts/MarketMakers/LMSRMarketMaker.sol';
import '../Registry.sol';
import "./Oracles/ScalarPriceOracle.sol";
import "./ChallengeInterface.sol";
contract FutarchyChallenge is ChallengeInterface {
event _InitiatedFutarchy(address challenger, uint stakeAmount, address futarchyOracleAddress);
// ============
// STATE:
// ============
// GLOBAL VARIABLES
address public challenger; // the address of the challenger
address public listingOwner; // the address of the listingOwner
bool public marketsAreClosed; // true if futarchy markets are closed
uint public stakeAmount; // number of tokens to stake for either party during challenge
uint public tradingPeriod; // duration for open trading before futarchy decision resolution
int public upperBound;
int public lowerBound;
FutarchyOracle public futarchyOracle; // Futarchy Oracle to resolve challenge
FutarchyOracleFactory public futarchyOracleFactory; // Factory to create FutarchyOracle
ScalarPriceOracle public scalarPriceOracle; // Oracle to resolve scalar prediction markets
LMSRMarketMaker public lmsrMarketMaker; // MarketMaker for scalar prediction markets
Registry public registry; // Address of TCR
uint public winningMarketIndex; // Index of scalar prediction market with greatest average price for long token
uint public rewardBalance; // Amount of tokens to be rewarded to challenge winner contingent on leftover initial funding liquidity
// ------------
// CONSTRUCTOR:
// ------------
/// @dev Constructor Sets up majority of the FutarchyChallenge global state variables
/// @param _registry Address of the registry
/// @param _challenger Address of the challenger
/// @param _listingOwner Address of the listing owner
/// @param _stakeAmount Number of tokens to stake for either party during challenge
/// @param _tradingPeriod Duration for open trading on scalar prediction markets
/// @param _futarchyOracleFactory Factory to create futarchyOracle
/// @param _scalarPriceOracle Factory to create scalarPriceOracle for scalar prediction markets
/// @param _lmsrMarketMaker LMSR Market Maker for scalar prediction markets
function FutarchyChallenge(
Registry _registry,
address _challenger,
address _listingOwner,
uint _stakeAmount,
uint _tradingPeriod,
int _upperBound,
int _lowerBound,
FutarchyOracleFactory _futarchyOracleFactory,
ScalarPriceOracle _scalarPriceOracle,
LMSRMarketMaker _lmsrMarketMaker
) public {
require(_tradingPeriod > 0);
require(_upperBound > _lowerBound);
registry = _registry;
challenger = _challenger;
listingOwner = _listingOwner;
stakeAmount = _stakeAmount;
tradingPeriod = _tradingPeriod;
upperBound = _upperBound;
lowerBound = _lowerBound;
futarchyOracleFactory = _futarchyOracleFactory;
scalarPriceOracle = _scalarPriceOracle;
lmsrMarketMaker = _lmsrMarketMaker;
}
// ------------
// Challenge Interface:
// ------------
/// @dev initiateFutarchyOracle Creates and funds FutarchyOracle. Futarchy Oracle will spin up
/// corresponding prediction markets which will open for trade starting now
function initiateFutarchy() public {
require(futarchyOracle == address(0));
uint _startDate = now;
futarchyOracle = futarchyOracleFactory.createFutarchyOracle(
registry.token(),
scalarPriceOracle,
2,
lowerBound,
upperBound,
lmsrMarketMaker,
0,
tradingPeriod,
_startDate
);
require(registry.token().approve(futarchyOracle, stakeAmount));
futarchyOracle.fund(stakeAmount);
emit _InitiatedFutarchy(msg.sender, stakeAmount, address(futarchyOracle));
}
/// @dev ended returns whether Challenge has ended
function ended() public view returns (bool) {
return futarchyOracle.isOutcomeSet();
}
/// @dev passed returns whether Challenge has passed
function passed() public view returns (bool) {
require(ended());
// marketIndex 1 == deniedScalar
// if proposal is denied, the challenge has passed.
return futarchyOracle.getOutcome() == 1;
}
function winnerRewardAmount() public view returns (uint256) {
require(marketsAreClosed);
return rewardBalance;
}
function close() public {
require(!marketsAreClosed);
futarchyOracle.close(); // transfers remaining futarchyOracle liquidity back to this contract
marketsAreClosed = true;
rewardBalance = registry.token().balanceOf(this);
require(registry.token().approve(registry, rewardBalance));
}
}
|
Oracle to resolve scalar prediction markets
|
ScalarPriceOracle public scalarPriceOracle;
| 1,020,564
|
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/**
* This contract acts as a controller for front-end
* requests. The DB file is separate incase, solidity adds
* functionality to return structs. In that case, only
* this contract needs to be redeployed and data migration
* will not be needed as the data is stored in DB.sol
* contract.
*/
pragma solidity ^0.4.24;
pragma experimental ABIEncoderV2; // experimental
// imports
import "./Blockvitae.sol";
import "./DBGetter.sol";
import "./DB.sol";
contract BlockvitaeGetter is Blockvitae {
Blockvitae private blockvitae;
DBGetter private dbGetter;
DB private db;
// @Reference:
// http://solidity.readthedocs.io/en/latest/contracts.html#arguments-for-base-constructors
constructor(DB _db, DBInsert _dbInsert, DBGetter _dbGetter, DBDelete _dbDelete, Blockvitae _blockvitae)
Blockvitae(_db, _dbInsert, _dbGetter, _dbDelete)
public {
// set this contract as the owner of DB contract
// to avoid any external calls to DB contract
// All calls to DB contract should pass through this
// contract
_db.setOwner(address(this));
db = _db;
dbGetter = _dbGetter;
blockvitae = _blockvitae;
}
// check for the owner
modifier isOwner(address _sender) {
require(blockvitae.owner() == _sender);
_;
}
// @description
// gets count of total education added
//
// @param address _user
// address of the user who's data is to be searched
//
// @return uint
// count of the total education for the given user
function getEducationCount(address _user)
public
view
returns(uint) {
return dbGetter.findUserEducation(_user).length;
}
// @description
// gets the user education with the given index for the given user
//
// @param address _user
// address of the user who's education is to be searched
//
// @param uint _index
// index of the education to be searched
//
// @return (string, string, string, string, string, bool)
// organization, level, dateStart, dateEnd
// and description of the education with given index
function getUserEducation(address _user, uint _index)
public
view
returns(string, string, string, string, string, bool) {
User.UserEducation[] memory education = dbGetter.findUserEducation(_user);
return (education[_index].organization, education[_index].level,
education[_index].dateStart, education[_index].dateEnd,
education[_index].description, education[_index].isDeleted);
}
// @description
// gets count of total publications added
//
// @param address _user
// address of the user who's data is to be searched
//
// @return uint
// count of the total publication for the given user
function getPublicationCount(address _user)
public
view
returns(uint) {
return dbGetter.findUserPublication(_user).length;
}
// @description
// gets the user publication with the given index for the given user
//
// @param address _user
// address of the user who's publication is to be searched
//
// @param uint _index
// index of the publication to be searched
//
// @return (string, string, string, bool)
// title, url, description & isDeleted of the publication with given index
function getUserPublication(address _user, uint _index)
public
view
returns(string, string, string, bool) {
User.UserPublication[] memory publication = dbGetter.findUserPublication(_user);
return (publication[_index].title, publication[_index].url,
publication[_index].description, publication[_index].isDeleted);
}
// @description
// gets the array of skills of the user
//
// @param address _user
// address of the user who's data is to be searched
//
// @return bytes32[]
// array of skills of the user with given address
function getUserSkills(address _user) public view returns(bytes32[]) {
return dbGetter.findUserSkill(_user).skills;
}
// @description
// gets the string of introduction of the user
//
// @param address _user
// address of the user who's data is to be searched
//
// @return string
// introduction of the user with given address
function getUserIntroduction(address _user) public view returns(string) {
return dbGetter.findUserIntroduction(_user).introduction;
}
// @description
// Solidity doesn't allow to return array of strings
// Therefore, get count of projects first and
// then get each project one at a time from front end
//
// @param address _user
// address of the user who's data is to be searched
//
// @return uint
// count of the total projects for the given user
function getProjectCount(address _user)
public
view
returns(uint) {
return dbGetter.findUserProject(_user).length;
}
// @description
// gets the user project with the given index for the given user
//
// @param address _user
// address of the user who's projects are to be searched
//
// @param uint _index
// index of the project to be searched
//
// @return (string, string, string, string, bool)
// name, short description, description and url of the project with given index
function getUserProject(address _user, uint _index)
public
view
returns(string, string, string, string, bool) {
User.UserProject[] memory projects = dbGetter.findUserProject(_user);
return (projects[_index].name, projects[_index].shortDescription,
projects[_index].description, projects[_index].url,
projects[_index].isDeleted);
}
// @description
// gets count of total work experiences added
//
// @param address _user
// address of the user who's data is to be searched
//
// @return uint
// count of the total work exp for the given user
function getWorkExpCount(address _user)
public
view
returns(uint) {
return dbGetter.findUserWorkExp(_user).length;
}
// @description
// gets the user work exp with the given index for the given user
//
// @param address _user
// address of the user who's work exp are to be searched
//
// @param uint _index
// index of the work exp to be searched
//
// @return (string, string, string, string, string, bool, bool)
// company, position, dateStart, dateEnd
// and description of the work exp with given index
function getUserWorkExp(address _user, uint _index)
public
view
returns(string, string, string, string, string, bool, bool) {
User.UserWorkExp[] memory work = dbGetter.findUserWorkExp(_user);
return (work[_index].company, work[_index].position, work[_index].dateStart,
work[_index].dateEnd, work[_index].description,
work[_index].isWorking, work[_index].isDeleted);
}
// @description
// returns UserDetail struct values
// for the given address if user exists
//
// @param address _user
// address of the user for which UserDetail is
// to be searched
//
// @return (string, bytes32, string, string, string, string)
// array of strings containing values of
// UserDetail struct in the respective order
function getUserDetail(address _user)
public
view
returns(string, bytes32, string, string, string, string)
{
// find the user details
User.UserDetail memory personal = dbGetter.findUserDetail(_user);
// return
return (personal.fullName, personal.userName, personal.imgUrl,
personal.email, personal.location, personal.description);
}
// @description
// returns UserSocial struct values
// for the given address if user exists
//
// @param address _user
// address of the user for which UserSocial is
// to be searched
//
// @return (string, string, string, string, string, string, string, string)
// array of strings containing values of
// UserSocial struct in the respective order
function getUserSocial(address _user)
public
view
returns(string, string, string, string, string, string, string, string)
{
// find the user details
User.UserSocial memory social = dbGetter.findUserSocial(_user);
// return
return (social.websiteUrl, social.twitterUrl, social.fbUrl, social.githubUrl, social.dribbbleUrl,
social.linkedInUrl, social.behanceUrl, social.mediumUrl);
}
// @description
// finds the address the given userName
//
// @param string _userName
// userName of the user who's address is to be searched
//
// @return address
// address of the user with given userName
function getAddrForUserName(bytes32 _userName)
public
view
returns(address)
{
return dbGetter.findAddrForUserName(_userName);
}
// @description
// Checks if the given username is available or taken
//
// @param string _userName
// username to be checked
//
// @return bool
// true if username is available else false
function isUsernameAvailable(bytes32 _userName)
public
view
returns(bool)
{
return dbGetter.usernameExists(_userName);
}
// @description
// gets the total number of users registered so far
//
// @return uint
// count of users registered so far
function getTotalUsers() public view isOwner(msg.sender) returns(uint) {
return db.totalUsers();
}
}
|
@description gets the total number of users registered so far @return uint count of users registered so far
|
function getTotalUsers() public view isOwner(msg.sender) returns(uint) {
return db.totalUsers();
}
| 15,863,060
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./lib/ColorUtils.sol";
import "./DixelSVGGenerator.sol";
import "./DixelArt.sol";
/**
* @title Dixel
*
* Crowd-sourced pixel art community
*/
contract Dixel is Context, ReentrancyGuard, DixelSVGGenerator {
IERC20 public baseToken;
DixelArt public dixelArt;
uint200 internal constant GENESIS_PRICE = 1e15; // Initial price: 0.001 DIXEL (~$0.005)
uint256 internal constant PRICE_INCREASE_RATE = 10; // 0.1% price increase on over-writing
uint256 internal constant REWARD_RATE = 1000; // 10% goes to contributors & 90% goes to NFT contract for refund on burn
uint256 internal constant MAX_RATE = 10000;
uint256 public genesisBlock;
struct Pixel {
uint24 color; // 24bit integer (000000 - ffffff = 0 - 16777215)
uint32 owner; // GAS_SAVING: player.id, max 42B users
uint200 price; // GAS_SAVING
}
struct PixelParams {
uint8 x;
uint8 y;
uint24 color;
}
struct Player {
uint32 id;
uint32 contribution;
uint192 rewardClaimed;
uint256 rewardDebt;
}
uint256 public totalContribution;
uint256 internal accRewardPerContribution;
// Fancy math here:
// - player.rewardDebt: Reward amount that should be deducted (the amount accumulated before I joined)
// - accRewardPerContribution: Accumulated reward per share (contribution)
// (use `accRewardPerContribution * 1e21` because the value is normally less than 1 with many decimals)
// Example: accRewardPerContribution =
// 1. reward: 100 (+100) & total contribution: 100 -> 0 + 100 / 100 = 1.0
// 2. reward: 150 (+50) & total contribution: 200 (+100) -> 1 + 50 / 200 = 1.25
// 3. reward: 250 (+100) & total contribution: 230 (+30) -> 1.25 + 100 / 230 = 1.68478
//
// => claimableReward = (player.contribution * accRewardPerContribution) - player.rewardDebt
//
// Update `accRewardPerContribution` whenever a reward added (new NFT is minted)
// => accRewardPerContribution += reward generated / (new)totalContribution
//
// Update player's `rewardDebt` whenever the player claim reward or mint a new token (contribution changed)
// => player.rewardDebt = accRewardPerContribution * totalContribution
Pixel[CANVAS_SIZE][CANVAS_SIZE] public pixels;
// GAS_SAVING: Store player's wallet addresses
address[] public playerWallets;
mapping(address => Player) public players;
event ClaimReward(address indexed player, uint256 rewardAmount);
// solhint-disable-next-line func-visibility
constructor(address baseTokenAddress, address dixelArtAddress, uint256 _genesisBlock) {
baseToken = IERC20(baseTokenAddress);
dixelArt = DixelArt(dixelArtAddress);
genesisBlock = _genesisBlock;
// players[0].id = baseTokenAddress (= token burning)
playerWallets.push(baseTokenAddress);
players[baseTokenAddress].id = 0;
unchecked {
for (uint256 x = 0; x < CANVAS_SIZE; x++) {
for (uint256 y = 0; y < CANVAS_SIZE; y++) {
// omit initial owner because default value 0 is correct
pixels[x][y].price = GENESIS_PRICE;
}
}
}
}
function _getOrAddPlayer(address wallet) internal returns (Player storage) {
require(playerWallets.length < 0xffffffff, "MAX_USER_REACHED");
if (players[wallet].id == 0 && wallet != playerWallets[0]) {
playerWallets.push(wallet);
players[wallet].id = uint32(playerWallets.length - 1);
}
return players[wallet];
}
function updatePixels(PixelParams[] calldata params, uint256 nextTokenId) external nonReentrant {
require(block.number >= genesisBlock, "NOT_STARTED_YET");
require(params.length > 0 && params.length <= CANVAS_SIZE * CANVAS_SIZE, "INVALID_PIXEL_PARAMS");
require(nextTokenId == dixelArt.nextTokenId(), "NFT_EDITION_NUMBER_MISMATCHED");
address msgSender = _msgSender();
Player storage player = _getOrAddPlayer(msgSender);
uint256 totalPrice = 0;
uint8 prevX = 0;
uint8 prevY = 0;
unchecked {
for (uint256 i = 0; i < params.length; i++) {
if (i > 0) { // should not check for the first parameter
require(prevX * CANVAS_SIZE + prevY < params[i].x * CANVAS_SIZE + params[i].y, "PARAMS_NOT_SORTED");
}
prevX = params[i].x;
prevY = params[i].y;
Pixel storage pixel = pixels[params[i].x][params[i].y];
// compare old color with incoming color
require(pixel.color != params[i].color, "UNCHANGED_PIXEL_COLORS");
uint200 oldPrice = pixel.price;
pixel.color = params[i].color;
pixel.owner = player.id;
totalPrice += oldPrice;
pixel.price = uint200(oldPrice + oldPrice * PRICE_INCREASE_RATE / MAX_RATE);
assert(pixel.price > oldPrice);
}
}
uint16 updatedPixelCount = uint16(params.length);
// DIXEL total supply is 1M, so uint96 will be enough
uint96 reserveForRefund = _updatePlayerReward(player, totalPrice, updatedPixelCount);
// Mint NFT to the user
dixelArt.mint(msgSender, getPixelColors(), updatedPixelCount, reserveForRefund, uint96(totalPrice));
}
function _updatePlayerReward(Player storage player, uint256 totalPrice, uint256 updatedPixelCount) internal returns (uint96) {
address msgSender = playerWallets[player.id];
unchecked {
// 10% goes to the contributor reward pools
uint256 reward = (totalPrice * REWARD_RATE) / MAX_RATE;
require(baseToken.transferFrom(msgSender, address(this), reward), "REWARD_TRANSFER_FAILED");
// 90% goes to the NFT contract for refund on burn
require(baseToken.transferFrom(msgSender, address(dixelArt), totalPrice - reward), "RESERVE_TRANSFER_FAILED");
// Keep the pending reward, so it can be deducted from debt at the end (No auto claiming)
uint256 pendingReward = claimableReward(msgSender);
// Calculate how much reward earned from new reward
uint256 playerEarned;
// Update acc values before updating contributions so players don't get rewards for their own penalties
if (totalContribution != 0) { // The first reward will be permanently locked on the contract
accRewardPerContribution += (1e21 * reward) / totalContribution; // multiply 1e21 to preserve decimals on calculation
// If the same player already has some contribution, that should be added (= deducted from debt)
playerEarned = player.contribution * reward / totalContribution;
}
totalContribution += updatedPixelCount;
player.contribution += uint32(updatedPixelCount);
// Update debt so user can only claim reward from after this event
player.rewardDebt = _totalPlayerRewardSoFar(player.contribution) - pendingReward - playerEarned;
return uint96(totalPrice - reward);
}
}
function totalPlayerCount() external view returns (uint256) {
return playerWallets.length - 1; // -1 for wallet[0] = baseToken (burn)
}
// MARK: - Reward by contributions
function _totalPlayerRewardSoFar(uint32 playerContribution) private view returns (uint256) {
return (accRewardPerContribution * playerContribution) / 1e21;
}
function claimableReward(address wallet) public view returns (uint256) {
return _totalPlayerRewardSoFar(players[wallet].contribution) - players[wallet].rewardDebt;
}
function claimReward() external {
address msgSender = _msgSender();
uint256 amount = claimableReward(msgSender);
require(amount > 0, "NOTHING_TO_CLAIM");
Player storage player = players[msgSender];
unchecked {
player.rewardClaimed += uint192(amount);
}
player.rewardDebt = _totalPlayerRewardSoFar(player.contribution); // claimable becomes 0
require(baseToken.transfer(msgSender, amount), 'TOKEN_TRANSFER_FAILED');
emit ClaimReward(msgSender, amount);
}
// MARK: - Draw SVG
function getPixelColors() public view returns (uint24[CANVAS_SIZE][CANVAS_SIZE] memory pixelColors) {
for (uint256 x = 0; x < CANVAS_SIZE; x++) {
for (uint256 y = 0; y < CANVAS_SIZE; y++) {
pixelColors[x][y] = pixels[x][y].color;
}
}
}
function getPixelOwners() external view returns (address[CANVAS_SIZE][CANVAS_SIZE] memory pixelOwners) {
for (uint256 x = 0; x < CANVAS_SIZE; x++) {
for (uint256 y = 0; y < CANVAS_SIZE; y++) {
pixelOwners[x][y] = playerWallets[pixels[x][y].owner];
}
}
}
function getPixelPrices() external view returns (uint200[CANVAS_SIZE][CANVAS_SIZE] memory pixelPrices) {
for (uint256 x = 0; x < CANVAS_SIZE; x++) {
for (uint256 y = 0; y < CANVAS_SIZE; y++) {
pixelPrices[x][y] = pixels[x][y].price;
}
}
}
function generateSVG() external view returns (string memory) {
return _generateSVG(getPixelColors());
}
function generateBase64SVG() external view returns (string memory) {
return _generateBase64SVG(getPixelColors());
}
}
|
multiply 1e21 to preserve decimals on calculation
|
accRewardPerContribution += (1e21 * reward) / totalContribution;
| 5,448,801
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