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Latest 25 from a total of 61 transactions
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Mass Redeem | 21876975 | 4 hrs ago | IN | 0 ETH | 0.00046137 | ||||
Mass Redeem | 21832437 | 6 days ago | IN | 0 ETH | 0.00126321 | ||||
Mass Redeem | 21828060 | 7 days ago | IN | 0 ETH | 0.00060452 | ||||
Mass Redeem | 21778071 | 14 days ago | IN | 0 ETH | 0.00075857 | ||||
Mass Redeem | 21751314 | 17 days ago | IN | 0 ETH | 0.002381 | ||||
Mass Redeem | 21727808 | 21 days ago | IN | 0 ETH | 0.00113026 | ||||
Mass Redeem | 21677651 | 28 days ago | IN | 0 ETH | 0.00474067 | ||||
Mass Redeem | 21634305 | 34 days ago | IN | 0 ETH | 0.00191923 | ||||
Mass Redeem | 21627114 | 35 days ago | IN | 0 ETH | 0.00211114 | ||||
Mass Redeem | 21577378 | 42 days ago | IN | 0 ETH | 0.00358958 | ||||
Mass Redeem | 21527239 | 49 days ago | IN | 0 ETH | 0.00232824 | ||||
Mass Redeem | 21477112 | 56 days ago | IN | 0 ETH | 0.00325306 | ||||
Mass Redeem | 21448147 | 60 days ago | IN | 0 ETH | 0.00429069 | ||||
Mass Redeem | 21427043 | 63 days ago | IN | 0 ETH | 0.00937097 | ||||
Mass Redeem | 21376895 | 70 days ago | IN | 0 ETH | 0.00946726 | ||||
Mass Redeem | 21326761 | 77 days ago | IN | 0 ETH | 0.01278263 | ||||
Mass Redeem | 21276712 | 84 days ago | IN | 0 ETH | 0.00567469 | ||||
Mass Redeem | 21269202 | 85 days ago | IN | 0 ETH | 0.0040533 | ||||
Mass Redeem | 21226574 | 91 days ago | IN | 0 ETH | 0.00630734 | ||||
Mass Redeem | 21176392 | 98 days ago | IN | 0 ETH | 0.02088135 | ||||
Mass Redeem | 21076087 | 112 days ago | IN | 0 ETH | 0.00561951 | ||||
Mass Redeem | 21051829 | 115 days ago | IN | 0 ETH | 0.00391698 | ||||
Mass Redeem | 21025905 | 119 days ago | IN | 0 ETH | 0.00599563 | ||||
Mass Redeem | 20975747 | 126 days ago | IN | 0 ETH | 0.00844086 | ||||
Mass Redeem | 20925654 | 133 days ago | IN | 0 ETH | 0.00781562 |
Latest 25 internal transactions (View All)
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21876975 | 4 hrs ago | 0.00103537 ETH | ||||
21876975 | 4 hrs ago | 0.08772937 ETH | ||||
21876975 | 4 hrs ago | 0.08876474 ETH | ||||
21876975 | 4 hrs ago | 0.08772937 ETH | ||||
21876975 | 4 hrs ago | 0.08772937 ETH | ||||
21832437 | 6 days ago | 0.00075249 ETH | ||||
21832437 | 6 days ago | 0.10495214 ETH | ||||
21832437 | 6 days ago | 0.10570464 ETH | ||||
21832437 | 6 days ago | 0.10495214 ETH | ||||
21832437 | 6 days ago | 0.10495214 ETH | ||||
21828060 | 7 days ago | 0.00047269 ETH | ||||
21828060 | 7 days ago | 0.09260115 ETH | ||||
21828060 | 7 days ago | 0.09307385 ETH | ||||
21828060 | 7 days ago | 0.09260115 ETH | ||||
21828060 | 7 days ago | 0.09260115 ETH | ||||
21778071 | 14 days ago | 0.00018252 ETH | ||||
21778071 | 14 days ago | 0.05578816 ETH | ||||
21778071 | 14 days ago | 0.05597069 ETH | ||||
21778071 | 14 days ago | 0.05578816 ETH | ||||
21778071 | 14 days ago | 0.05578816 ETH | ||||
21751314 | 17 days ago | 0.00098745 ETH | ||||
21751314 | 17 days ago | 0.15438816 ETH | ||||
21751314 | 17 days ago | 0.15537562 ETH | ||||
21751314 | 17 days ago | 0.15438816 ETH | ||||
21751314 | 17 days ago | 0.15438816 ETH |
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Contract Source Code Verified (Exact Match)
Contract Name:
DYFIRedeemer
Compiler Version
v0.8.18+commit.87f61d96
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.18; import { IFlashLoanProvider } from "src/interfaces/deps/balancer/IFlashLoanProvider.sol"; import { IRedemption } from "src/interfaces/deps/yearn/veYFI/IRedemption.sol"; import { AccessControlEnumerable } from "@openzeppelin/contracts/access/AccessControlEnumerable.sol"; import { AggregatorV3Interface } from "src/interfaces/deps/chainlink/AggregatorV3Interface.sol"; import { Errors } from "src/libraries/Errors.sol"; import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { ICurveTwoAssetPool } from "src/interfaces/deps/curve/ICurveTwoAssetPool.sol"; import { IWETH } from "src/interfaces/deps/IWETH.sol"; import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import { IDYFIRedeemer } from "src/interfaces/IDYFIRedeemer.sol"; import { Pausable } from "@openzeppelin/contracts/security/Pausable.sol"; import { Math } from "@openzeppelin/contracts/utils/math/Math.sol"; /** * @title DYFIRedeemer * @notice This contract can be used to redeem dYFI for YFI for multiple dYFI holders in a single transaction. * Any address that holds dYFI can approve this contract to spend their dYFI. Then the caller of massRedeem * will provide a list of dYFI holders and their dYFI amounts. By utilizing low-fee flash loans from Balancer, * this contract can redeem all dYFI for YFI, and sell the excess YFI for ETH to pay back the flash loan and * to reward the caller. * The users who approve this contract to spend their dYFI must acknowledge that they will not receive more than * the minimum amount of YFI that should be redeemed for their dYFI. The minimum amount of YFI at a given time can be * calculated using the `minYfiRedeem(uint256 dYfiAmount)` function. */ contract DYFIRedeemer is IDYFIRedeemer, AccessControlEnumerable, ReentrancyGuard, Pausable { using SafeERC20 for IERC20; /// @dev Address of the redemption contract for dYFI tokens. address private constant _REDEMPTION = 0x7dC3A74F0684fc026f9163C6D5c3C99fda2cf60a; /// @dev Address of the Chainlink YFI/ETH price feed contract. address private constant _YFI_ETH_PRICE_FEED = 0x3EbEACa272Ce4f60E800f6C5EE678f50D2882fd4; /// @dev Address of the Balancer flash loan provider contract. address private constant _FLASH_LOAN_PROVIDER = 0xBA12222222228d8Ba445958a75a0704d566BF2C8; /// @dev Address of the dYFI token contract. address private constant _DYFI = 0x41252E8691e964f7DE35156B68493bAb6797a275; /// @dev Address of the YFI token contract. address private constant _YFI = 0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e; /// @dev Address of the WETH token contract. address private constant _WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; /// @dev Address of the Curve ETH/YFI liquidity pool contract. address private constant _ETH_YFI_CURVE_POOL = 0xC26b89A667578ec7b3f11b2F98d6Fd15C07C54ba; /// @dev Maximum slippage allowed during redemption, represented as a fraction of 1e18. uint256 private constant _MAX_SLIPPAGE = 0.05e18; /// @dev Default slippage used during redemption if no specific slippage is set, represented as a fraction of 1e18. uint256 private constant _DEFAULT_SLIPPAGE = 0.01e18; /// @notice The slippage that should be applied to the redemption process uint256 private _slippage; /** * @notice Emitted when the slippage is set. * @param slippage The new slippage value set for the redemption process. */ event SlippageSet(uint256 slippage); /** * @notice Emitted when dYFI is redeemed for YFI. * @param dYfiHolder The address of the dYFI holder whose tokens were redeemed. * @param dYfiAmount The amount of dYFI that was redeemed. * @param yfiAmount The amount of YFI received from redeeming the dYFI. */ event DYfiRedeemed(address indexed dYfiHolder, uint256 dYfiAmount, uint256 yfiAmount); /** * @notice Emitted when a reward is given to the caller of the massRedeem function. * @param caller The address of the caller who received the reward. * @param amount The amount of the reward received. */ event CallerReward(address indexed caller, uint256 amount); // slither-disable-next-line locked-ether constructor(address admin) payable { // Effects _grantRole(DEFAULT_ADMIN_ROLE, admin); _slippage = _DEFAULT_SLIPPAGE; // Interactions IERC20(_YFI).forceApprove(_ETH_YFI_CURVE_POOL, type(uint256).max); IERC20(_DYFI).forceApprove(_REDEMPTION, type(uint256).max); } /// @dev Allows this contract to receive ETH receive() external payable { } /** * @notice Redeems dYFI for YFI for multiple dYFI holders in a single transaction. Any extra ETH will be sent to the * caller. * @dev This function utilizes flash loans from Balancer to acquire ETH needed to redeem dYFI for YFI. * The amount of YFI to distribute is calculated as follows: * YFI to distribute = dYFI amount - ETH required for redemption * YFI/ETH price * (1 + slippage) * The extra YFI is swapped for ETH and sent to the caller as an extra reward. * @param dYfiHolders list of addresses that hold dYFI and have approved this contract to spend their dYFI * @param dYfiAmounts list of dYFI amounts that should be redeemed for YFI from the corresponding dYFI holder */ function massRedeem( address[] calldata dYfiHolders, uint256[] calldata dYfiAmounts ) external nonReentrant whenNotPaused { if (dYfiHolders.length != dYfiAmounts.length) { revert Errors.InvalidArrayLength(); } // Transfer all dYfi to this contract from dYfi holders who have approved this contract // List of dYfi holders and their dYfi amounts must be provided off-chain uint256 totalDYfiAmount; for (uint256 i = 0; i < dYfiHolders.length;) { totalDYfiAmount += dYfiAmounts[i]; // slither-disable-next-line arbitrary-send-erc20 IERC20(_DYFI).safeTransferFrom(dYfiHolders[i], address(this), dYfiAmounts[i]); /// @dev The unchecked block is used here because overflow is not possible as the loop index `i` /// is simply incremented in each iteration. The loop is bounded by `dYfiHolders.length`, ensuring /// that `i` will not exceed the length of the array and overflow. Underflow is not a concern as `i` /// is initialized to 0 and only incremented. unchecked { ++i; } } if (totalDYfiAmount == 0) { revert Errors.NoDYfiToRedeem(); } // Determine ETH required for redemption uint256 ethRequired = _getEthRequired(totalDYfiAmount); // Calculate amount of YFI to swap based on the slippage and ETH required for redemption uint256 yfiToSwap = ethRequired * (1e18 + _slippage) / _getLatestPrice(); // Calculate total YFI that should be sent to dYFI holders uint256 yfiToDistribute = totalDYfiAmount - yfiToSwap; // Construct flash loan parameters IERC20[] memory tokens = new IERC20[](1); tokens[0] = IERC20(_WETH); uint256[] memory amounts = new uint256[](1); amounts[0] = ethRequired; // Flashloan ETH required for redemption. After the flash loan, this contract will have // YFI to distribute to dYFI holders and some ETH to reward the caller. IFlashLoanProvider(_FLASH_LOAN_PROVIDER).flashLoan( this, tokens, amounts, abi.encode(totalDYfiAmount, yfiToSwap) ); // Distribute YFI to dYFI holders proportionally to their dYFI amounts // If for any reason, the flashLoan call resulted in less YFI than yfiToDistribute, the following // distribution would revert on a transfer call. for (uint256 i = 0; i < dYfiHolders.length;) { uint256 yfiAmount = yfiToDistribute * dYfiAmounts[i] / totalDYfiAmount; emit DYfiRedeemed(dYfiHolders[i], dYfiAmounts[i], yfiAmount); IERC20(_YFI).safeTransfer(dYfiHolders[i], yfiAmount); /// @dev The unchecked block is used here because overflow is not possible as the loop index `i` /// is simply incremented in each iteration. The loop is bounded by `dYfiHolders.length`, ensuring /// that `i` will not exceed the length of the array and overflow. Underflow is not a concern as `i` /// is initialized to 0 and only incremented. unchecked { ++i; } } // Send the remaining ETH to the caller uint256 callerReward = address(this).balance; emit CallerReward(msg.sender, callerReward); // slither-disable-next-line arbitrary-send-eth,low-level-calls (bool sent,) = msg.sender.call{ value: callerReward }(""); if (!sent) { revert Errors.CallerRewardEthTransferFailed(); } } /** * @notice Called by the flash loan provider to execute a flash loan of WETH. * @param tokens list of token addresses flash loaned. * @param amounts list of amounts flash loaned. * @param feeAmounts list of fee amounts that must be paid back. * @param userData additional data with no specified format. */ function receiveFlashLoan( IERC20[] calldata tokens, uint256[] calldata amounts, uint256[] calldata feeAmounts, bytes calldata userData ) external { if (msg.sender != _FLASH_LOAN_PROVIDER) { revert Errors.NotAuthorized(); } if (tokens.length != 1 || amounts.length != 1 || feeAmounts.length != 1 || tokens[0] != IERC20(_WETH)) { revert Errors.InvalidTokensReceived(); } // Acquire ETH from flash loan IWETH(_WETH).withdraw(amounts[0]); // Calculate ETH payment to the flash loan provider uint256 flashLoanPayment = amounts[0] + feeAmounts[0]; // Decode userData (uint256 totalDYfiAmount, uint256 yfiToSwap) = abi.decode(userData, (uint256, uint256)); // Redeem all dYFI for YFI // Assume that the redemption contract will return the correct amount of YFI // slither-disable-next-line unused-return IRedemption(_REDEMPTION).redeem{ value: amounts[0] }(totalDYfiAmount); // Calculate amount of YFI to swap for ETH for the flash loan payment and the caller reward // Swap YFI for ETH. Require at least flashLoanPayment ETH to be received from the swap. // Any surplus ETH will be reserved for the caller of massRedeem. // slither-disable-next-line unused-return ICurveTwoAssetPool(_ETH_YFI_CURVE_POOL).exchange(1, 0, yfiToSwap, flashLoanPayment, true); // On correct behavior of the curve pool, the swap should result in at least flashLoanPayment ETH // If the swap behaved incorrectly and returned less than flashLoanPayment ETH, then the WETH deposit // call would fail with out of funds error. IWETH(_WETH).deposit{ value: flashLoanPayment }(); // Pay back the flash loan IERC20(_WETH).safeTransfer(msg.sender, flashLoanPayment); } /** * @notice Sets the slippage that should be applied to DYFI -> YFI redeems. * @dev The slippage is applied to the YFI/ETH price. For example, if the slippage is 0.01e18, * then the YFI/ETH price will be multiplied by 1.01. * @param slippage_ The new slippage to use for YFI swaps. */ function setSlippage(uint256 slippage_) external onlyRole(DEFAULT_ADMIN_ROLE) { if (slippage_ > _MAX_SLIPPAGE) { revert Errors.SlippageTooHigh(); } _setSlippage(slippage_); } /** * @notice Kills the contract. Only the admin can call this function. */ function kill() external onlyRole(DEFAULT_ADMIN_ROLE) { _pause(); } /** * @notice Returns the minimum amount of YFI that should be redeemed for a given amount of dYFI * @param dYfiAmount The amount of dYFI to redeem * @return The minimum amount of YFI that should be redeemed for a given amount of dYFI */ function minYfiRedeem(uint256 dYfiAmount) external view returns (uint256) { return dYfiAmount - _getEthRequired(dYfiAmount) * (1e18 + _MAX_SLIPPAGE) / _getLatestPrice(); } /** * @notice Returns the expected amount of YFI that should be redeemed for a given amount of dYFI * @param dYfiAmount The amount of dYFI to redeem * @return The expected amount of YFI that should be redeemed for a given amount of dYFI */ function currentYfiRedeem(uint256 dYfiAmount) external view returns (uint256) { return dYfiAmount - _getEthRequired(dYfiAmount) * (1e18 + _slippage) / _getLatestPrice(); } /** * @notice Calculates the expected amount of ETH the caller will receive for redeeming dYFI for YFI for the given * users and amounts. * @dev This assumes flash loan fee of 0. * @param dYfiAmount total dYFI amount that should be redeemed for YFI. * @return The expected amount of ETH the caller will receive for redeeming dYFI for YFI. */ function expectedMassRedeemReward(uint256 dYfiAmount) external view returns (uint256) { if (dYfiAmount == 0) { return 0; } // The ETH required for redemption will be flash loaned from Balancer uint256 ethRequired = _getEthRequired(dYfiAmount); uint256 yfiToSwap = ethRequired * (1e18 + _slippage) / _getLatestPrice(); uint256 minDy = ICurveTwoAssetPool(_ETH_YFI_CURVE_POOL).get_dy(1, 0, yfiToSwap); // Return surplus ETH return minDy - ethRequired; } /** * @notice Returns the latest YFI/ETH from the Chainlink price feed. * @return The latest ETH per 1 YFI from the Chainlink price feed. */ function getLatestPrice() external view returns (uint256) { return _getLatestPrice(); } /** * @notice Get the slippage that should be applied to DYFI -> YFI redeems. * @return The slippage in 1e18 precision. */ function slippage() external view returns (uint256) { return _slippage; } /** * @dev Internal function to set the slippage that should be applied to DYFI -> YFI redeems. * @param slippage_ The new slippage to use for YFI swaps. */ function _setSlippage(uint256 slippage_) internal { _slippage = slippage_; emit SlippageSet(slippage_); } /// @dev Returns ETH per 1 YFI in 1e18 precision function _getLatestPrice() internal view returns (uint256) { // slither-disable-next-line unused-return (uint80 roundID, int256 price,, uint256 timeStamp, uint80 answeredInRound) = AggregatorV3Interface(_YFI_ETH_PRICE_FEED).latestRoundData(); // revert if the returned price is 0 if (price == 0) { revert Errors.PriceFeedReturnedZeroPrice(); } // revert if answer was found in a previous round if (roundID > answeredInRound) { revert Errors.PriceFeedIncorrectRound(); } // slither-disable-next-line timestamp if (timeStamp + 3600 < block.timestamp) { revert Errors.PriceFeedOutdated(); } return uint256(price); } /// @dev Returns the minimum ETH required for redemption in 1e18 precision function _getEthRequired(uint256 dYfiAmount) internal view returns (uint256) { // Redemption contract returns the ETH required for redemption in 1e18 precision. // The redeem functions allows for a 0.3% slippage so we find the minimum ETH required for redemption // https://github.com/yearn/veYFI/blob/master/contracts/Redemption.vy#L112-L131 return Math.mulDiv(IRedemption(_REDEMPTION).eth_required(dYfiAmount), 997, 1000, Math.Rounding.Up); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.18; import { IERC20 } from "@openzeppelin/contracts/interfaces/IERC20.sol"; import { IFlashLoanRecipient } from "./IFlashLoanRecipient.sol"; interface IFlashLoanProvider { /** * @dev Performs a 'flash loan', sending tokens to `recipient`, executing the `receiveFlashLoan` hook on it, * and then reverting unless the tokens plus a proportional protocol fee have been returned. * * The `tokens` and `amounts` arrays must have the same length, and each entry in these indicates the loan amount * for each token contract. `tokens` must be sorted in ascending order. * * The 'userData' field is ignored by the Vault, and forwarded as-is to `recipient` as part of the * `receiveFlashLoan` call. * * Emits `FlashLoan` events. */ function flashLoan( IFlashLoanRecipient recipient, IERC20[] memory tokens, uint256[] memory amounts, bytes memory userData ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.18; interface IRedemption { function redeem(uint256 dYfiAmount) external payable returns (uint256); function eth_required(uint256 dYfiAmount) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControlEnumerable.sol"; import "./AccessControl.sol"; import "../utils/structs/EnumerableSet.sol"; /** * @dev Extension of {AccessControl} that allows enumerating the members of each role. */ abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl { using EnumerableSet for EnumerableSet.AddressSet; mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) { return _roleMembers[role].at(index); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) { return _roleMembers[role].length(); } /** * @dev Overload {_grantRole} to track enumerable memberships */ function _grantRole(bytes32 role, address account) internal virtual override { super._grantRole(role, account); _roleMembers[role].add(account); } /** * @dev Overload {_revokeRole} to track enumerable memberships */ function _revokeRole(bytes32 role, address account) internal virtual override { super._revokeRole(role, account); _roleMembers[role].remove(account); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.18; interface AggregatorV3Interface { function latestRoundData() external view returns (uint80 roundID, int256 price, uint256 startedAt, uint256 timeStamp, uint80 answeredInRound); function decimals() external view returns (uint256); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.8.18; /// @title Errors /// @notice Library containing all custom errors the protocol may revert with. library Errors { //// MASTER REGISTRY //// /// @notice Thrown when the registry name given is empty. error NameEmpty(); /// @notice Thrown when the registry address given is empty. error AddressEmpty(); /// @notice Thrown when the registry name is found when calling addRegistry(). error RegistryNameFound(bytes32 name); /// @notice Thrown when the registry name is not found but is expected to be. error RegistryNameNotFound(bytes32 name); /// @notice Thrown when the registry address is not found but is expected to be. error RegistryAddressNotFound(address registryAddress); /// @notice Thrown when the registry name and version is not found but is expected to be. error RegistryNameVersionNotFound(bytes32 name, uint256 version); /// @notice Thrown when a duplicate registry address is found. error DuplicateRegistryAddress(address registryAddress); //// YEARN STAKING DELEGATE //// /// @notice Error for when an address is zero which is not allowed. error ZeroAddress(); /// @notice Error for when an amount is zero which is not allowed. error ZeroAmount(); /// @notice Error for when a reward split is invalid. error InvalidRewardSplit(); /// @notice Error for when the treasury percentage is too high. error TreasuryPctTooHigh(); /// @notice Error for when perpetual lock is enabled and an action cannot be taken. error PerpetualLockEnabled(); /// @notice Error for when perpetual lock is disabled and an action cannot be taken. error PerpetualLockDisabled(); /// @notice Error for when swap and lock settings are not set. error SwapAndLockNotSet(); /// @notice Error for when gauge rewards have already been added. error GaugeRewardsAlreadyAdded(); /// @notice Error for when gauge rewards have not yet been added. error GaugeRewardsNotYetAdded(); /// @notice Error for when execution of an action is not allowed. error ExecutionNotAllowed(); /// @notice Error for when execution of an action has failed. error ExecutionFailed(); /// @notice Error for when Cove YFI reward forwarder is not set. error CoveYfiRewardForwarderNotSet(); //// STAKING DELEGATE REWARDS //// /// @notice Error for when a rescue operation is not allowed. error RescueNotAllowed(); /// @notice Error for when the previous rewards period has not been completed. error PreviousRewardsPeriodNotCompleted(); /// @notice Error for when only the staking delegate can update a user's balance. error OnlyStakingDelegateCanUpdateUserBalance(); /// @notice Error for when only the staking delegate can add a staking token. error OnlyStakingDelegateCanAddStakingToken(); /// @notice Error for when only the reward distributor can notify the reward amount. error OnlyRewardDistributorCanNotifyRewardAmount(); /// @notice Error for when a staking token has already been added. error StakingTokenAlreadyAdded(); /// @notice Error for when a staking token has not been added. error StakingTokenNotAdded(); /// @notice Error for when the reward rate is too low. error RewardRateTooLow(); /// @notice Error for when the reward duration cannot be zero. error RewardDurationCannotBeZero(); //// WRAPPED STRATEGY CURVE SWAPPER //// /// @notice Error for when slippage is too high. error SlippageTooHigh(); /// @notice Error for when invalid tokens are received. error InvalidTokensReceived(); /// CURVE ROUTER SWAPPER /// /* * @notice Error for when the from token is invalid. * @param intendedFromToken The intended from token address. * @param actualFromToken The actual from token address received. */ error InvalidFromToken(address intendedFromToken, address actualFromToken); /* * @notice Error for when the to token is invalid. * @param intendedToToken The intended to token address. * @param actualToToken The actual to token address received. */ error InvalidToToken(address intendedToToken, address actualToToken); /// @notice Error for when the expected amount is zero. error ExpectedAmountZero(); /// @notice Error for when swap parameters are invalid. error InvalidSwapParams(); /// SWAP AND LOCK /// /// @notice Error for when the same address is used in a context where it is not allowed. error SameAddress(); //// COVEYFI //// /// @notice Error for when only minting is enabled. error OnlyMintingEnabled(); /// RESCUABLE /// /// @notice Error for when an ETH transfer of zero is attempted. error ZeroEthTransfer(); /// @notice Error for when an ETH transfer fails. error EthTransferFailed(); /// @notice Error for when a token transfer of zero is attempted. error ZeroTokenTransfer(); /// GAUGE REWARD RECEIVER /// /// @notice Error for when an action is not authorized. error NotAuthorized(); /// @notice Error for when rescuing a reward token is not allowed. error CannotRescueRewardToken(); /// DYFI REDEEMER /// /// @notice Error for when an array length is invalid. error InvalidArrayLength(); /// @notice Error for when a price feed is outdated. error PriceFeedOutdated(); /// @notice Error for when a price feed round is incorrect. error PriceFeedIncorrectRound(); /// @notice Error for when a price feed returns a zero price. error PriceFeedReturnedZeroPrice(); /// @notice Error for when there is no DYFI to redeem. error NoDYfiToRedeem(); /// @notice Error for when an ETH transfer for caller reward fails. error CallerRewardEthTransferFailed(); /// COVE YEARN GAUGE FACTORY /// /// @notice Error for when a gauge has already been deployed. error GaugeAlreadyDeployed(); /// @notice Error for when a gauge has not been deployed. error GaugeNotDeployed(); /// MINICHEF V3 //// /// @notice Error for when an LP token is invalid. error InvalidLPToken(); /// @notice Error for when an LP token has not been added. error LPTokenNotAdded(); /// @notice Error for when an LP token does not match the pool ID. error LPTokenDoesNotMatchPoolId(); /// @notice Error for when there is an insufficient balance. error InsufficientBalance(); /// @notice Error for when an LP token has already been added. error LPTokenAlreadyAdded(); /// @notice Error for when the reward rate is too high. error RewardRateTooHigh(); /// Yearn4626RouterExt /// /// @notice Error for when there are insufficient shares. error InsufficientShares(); /// @notice Error for when the 'to' address is invalid. error InvalidTo(); /// @notice Error esure the has enough remaining gas. error InsufficientGas(); /// TESTING /// /// @notice Error for when there is not enough balance to take away. error TakeAwayNotEnoughBalance(); /// @notice Error for when a strategy has not been added to a vault. error StrategyNotAddedToVault(); /// COVE TOKEN /// /// @notice Error for when a transfer is attempted before it is allowed. error TransferNotAllowedYet(); /// @notice Error for when an address is being added as both a sender and a receiver. error CannotBeBothSenderAndReceiver(); /// @notice Error for when an unpause is attempted too early. error UnpauseTooEarly(); /// @notice Error for when the pause period is too long. error PausePeriodTooLong(); /// @notice Error for when minting is attempted too early. error MintingAllowedTooEarly(); /// @notice Error for when the mint amount exceeds the cap. error InflationTooLarge(); /* * @notice Error for when an unauthorized account attempts an action requiring a specific role. * @param account The account attempting the unauthorized action. * @param neededRole The role required for the action. */ error AccessControlEnumerableUnauthorizedAccount(address account, bytes32 neededRole); /// @notice Error for when an action is unauthorized. error Unauthorized(); /// @notice Error for when a pause is expected but not enacted. error ExpectedPause(); /// COVE YEARN GAUGE FACTORY /// /// @notice Error for when an address is not a contract. error AddressNotContract(); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.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; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ 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)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ 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"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @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"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @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). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // 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 cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.18; interface ICurveTwoAssetPool { function add_liquidity( uint256[2] calldata amounts, uint256 minMintAmount, bool useEth, address receiver ) external returns (uint256); function add_liquidity(uint256[2] calldata amounts, uint256 minMintAmount) external returns (uint256); function get_dy(uint256 i, uint256 j, uint256 dx) external view returns (uint256 dy); // solhint-disable func-param-name-mixedcase,var-name-mixedcase function exchange(uint256 i, uint256 j, uint256 dx, uint256 min_dy) external payable returns (uint256 dy); function exchange( uint256 i, uint256 j, uint256 dx, uint256 min_dy, bool useEth ) external payable returns (uint256 dy); function coins(uint256 arg0) external view returns (address); function price_oracle() external view returns (uint256); }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.18; interface IWETH { function deposit() external payable; function withdraw(uint256) external; function approve(address, uint256) external returns (bool); function transfer(address, uint256) external returns (bool); function transferFrom(address, address, uint256) external returns (bool); function balanceOf(address) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.18; import { IFlashLoanRecipient } from "src/interfaces/deps/balancer/IFlashLoanRecipient.sol"; import { IAccessControlEnumerable } from "@openzeppelin/contracts/access/AccessControlEnumerable.sol"; interface IDYFIRedeemer is IFlashLoanRecipient, IAccessControlEnumerable { function slippage() external view returns (uint256); function getLatestPrice() external view returns (uint256); function minYfiRedeem(uint256 dYfiAmount) external view returns (uint256); function currentYfiRedeem(uint256 dYfiAmount) external view returns (uint256); function expectedMassRedeemReward(uint256 dYfiAmount) external view returns (uint256); function massRedeem(address[] calldata accounts, uint256[] calldata dYfiAmounts) external; function setSlippage(uint256 slippage_) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (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 Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { 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 (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @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. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol) pragma solidity ^0.8.0; import "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT pragma solidity ^0.8.18; import { IERC20 } from "@openzeppelin/contracts/interfaces/IERC20.sol"; interface IFlashLoanRecipient { /** * @dev When `flashLoan` is called on the Vault, it invokes the `receiveFlashLoan` hook on the recipient. * * At the time of the call, the Vault will have transferred `amounts` for `tokens` to the recipient. Before this * call returns, the recipient must have transferred `amounts` plus `feeAmounts` for each token back to the * Vault, or else the entire flash loan will revert. * * `userData` is the same value passed in the `IVault.flashLoan` call. */ function receiveFlashLoan( IERC20[] memory tokens, uint256[] memory amounts, uint256[] memory feeAmounts, bytes memory userData ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; /** * @dev External interface of AccessControlEnumerable declared to support ERC165 detection. */ interface IAccessControlEnumerable is IAccessControl { /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) external view returns (address); /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ```solidity * 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}: * * ```solidity * 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. We recommend using {AccessControlDefaultAdminRules} * to enforce additional security measures for this role. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(account), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ 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. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. * * May emit a {RoleRevoked} event. */ 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. * * May emit a {RoleGranted} event. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. 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. * * ```solidity * 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. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ 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) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // 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; /// @solidity memory-safe-assembly 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 in 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; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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 Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. * * CAUTION: See Security Considerations above. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.4) (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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @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] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"admin","type":"address"}],"stateMutability":"payable","type":"constructor"},{"inputs":[],"name":"CallerRewardEthTransferFailed","type":"error"},{"inputs":[],"name":"InvalidArrayLength","type":"error"},{"inputs":[],"name":"InvalidTokensReceived","type":"error"},{"inputs":[],"name":"NoDYfiToRedeem","type":"error"},{"inputs":[],"name":"NotAuthorized","type":"error"},{"inputs":[],"name":"PriceFeedIncorrectRound","type":"error"},{"inputs":[],"name":"PriceFeedOutdated","type":"error"},{"inputs":[],"name":"PriceFeedReturnedZeroPrice","type":"error"},{"inputs":[],"name":"SlippageTooHigh","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"CallerReward","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"dYfiHolder","type":"address"},{"indexed":false,"internalType":"uint256","name":"dYfiAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"yfiAmount","type":"uint256"}],"name":"DYfiRedeemed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"slippage","type":"uint256"}],"name":"SlippageSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"dYfiAmount","type":"uint256"}],"name":"currentYfiRedeem","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"dYfiAmount","type":"uint256"}],"name":"expectedMassRedeemReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLatestPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"kill","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"dYfiHolders","type":"address[]"},{"internalType":"uint256[]","name":"dYfiAmounts","type":"uint256[]"}],"name":"massRedeem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"dYfiAmount","type":"uint256"}],"name":"minYfiRedeem","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"},{"internalType":"uint256[]","name":"feeAmounts","type":"uint256[]"},{"internalType":"bytes","name":"userData","type":"bytes"}],"name":"receiveFlashLoan","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"slippage_","type":"uint256"}],"name":"setSlippage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"slippage","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000007bd578354b0b2f02e656f1bdc0e41a80f860534b
-----Decoded View---------------
Arg [0] : admin (address): 0x7Bd578354b0B2f02E656f1bDC0e41a80f860534b
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000007bd578354b0b2f02e656f1bdc0e41a80f860534b
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Multichain Portfolio | 31 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.