ERC-20
Overview
Max Total Supply
24,681,390.044274613796590799 fFRAX(sfrxETH)-16
Holders
28
Total Transfers
-
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
FraxlendPair
Compiler Version
v0.8.18+commit.87f61d96
Optimization Enabled:
Yes with 1660 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; // ==================================================================== // | ______ _______ | // | / _____________ __ __ / ____(_____ ____ _____ ________ | // | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ | // | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ | // | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ | // | | // ==================================================================== // ========================== FraxlendPair ============================ // ==================================================================== // Frax Finance: https://github.com/FraxFinance // Primary Author // Drake Evans: https://github.com/DrakeEvans // Reviewers // Dennis: https://github.com/denett // Sam Kazemian: https://github.com/samkazemian // Travis Moore: https://github.com/FortisFortuna // Jack Corddry: https://github.com/corddry // Rich Gee: https://github.com/zer0blockchain // ==================================================================== import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "./FraxlendPairConstants.sol"; import "./FraxlendPairCore.sol"; import "./libraries/VaultAccount.sol"; import "./interfaces/ISwapper.sol"; /// @title FraxlendPair /// @author Drake Evans (Frax Finance) https://github.com/drakeevans /// @notice The FraxlendPair is a lending pair that allows users to engage in lending and borrowing activities contract FraxlendPair is IERC20Metadata, FraxlendPairCore { using VaultAccountingLibrary for VaultAccount; using SafeERC20 for IERC20; using SafeCast for uint256; /// @param _configData abi.encode(address _asset, address _collateral, address _oracle, uint32 _maxOracleDeviation, address _rateContract, uint64 _fullUtilizationRate, uint256 _maxLTV, uint256 _cleanLiquidationFee, uint256 _dirtyLiquidationFee, uint256 _protocolLiquidationFee) /// @param _immutables abi.encode(address _circuitBreakerAddress, address _comptrollerAddress, address _timelockAddress) /// @param _customConfigData abi.encode(string memory _nameOfContract, string memory _symbolOfContract, uint8 _decimalsOfContract) constructor( bytes memory _configData, bytes memory _immutables, bytes memory _customConfigData ) FraxlendPairCore(_configData, _immutables, _customConfigData) {} // ============================================================================================ // ERC20 Metadata // ============================================================================================ function name() public view override(ERC20, IERC20Metadata) returns (string memory) { return nameOfContract; } function symbol() public view override(ERC20, IERC20Metadata) returns (string memory) { return symbolOfContract; } function decimals() public view override(ERC20, IERC20Metadata) returns (uint8) { return decimalsOfContract; } // totalSupply for fToken ERC20 compatibility function totalSupply() public view override(ERC20, IERC20) returns (uint256) { return totalAsset.shares; } // ============================================================================================ // Functions: Helpers // ============================================================================================ function asset() external view returns (address) { return address(assetContract); } function getConstants() external pure returns ( uint256 _LTV_PRECISION, uint256 _LIQ_PRECISION, uint256 _UTIL_PREC, uint256 _FEE_PRECISION, uint256 _EXCHANGE_PRECISION, uint256 _DEVIATION_PRECISION, uint256 _RATE_PRECISION, uint256 _MAX_PROTOCOL_FEE ) { _LTV_PRECISION = LTV_PRECISION; _LIQ_PRECISION = LIQ_PRECISION; _UTIL_PREC = UTIL_PREC; _FEE_PRECISION = FEE_PRECISION; _EXCHANGE_PRECISION = EXCHANGE_PRECISION; _DEVIATION_PRECISION = DEVIATION_PRECISION; _RATE_PRECISION = RATE_PRECISION; _MAX_PROTOCOL_FEE = MAX_PROTOCOL_FEE; } /// @notice The ```getUserSnapshot``` function gets user level accounting data /// @param _address The user address /// @return _userAssetShares The user fToken balance /// @return _userBorrowShares The user borrow shares /// @return _userCollateralBalance The user collateral balance function getUserSnapshot( address _address ) external view returns (uint256 _userAssetShares, uint256 _userBorrowShares, uint256 _userCollateralBalance) { _userAssetShares = balanceOf(_address); _userBorrowShares = userBorrowShares[_address]; _userCollateralBalance = userCollateralBalance[_address]; } /// @notice The ```getPairAccounting``` function gets all pair level accounting numbers /// @return _totalAssetAmount Total assets deposited and interest accrued, total claims /// @return _totalAssetShares Total fTokens /// @return _totalBorrowAmount Total borrows /// @return _totalBorrowShares Total borrow shares /// @return _totalCollateral Total collateral function getPairAccounting() external view returns ( uint128 _totalAssetAmount, uint128 _totalAssetShares, uint128 _totalBorrowAmount, uint128 _totalBorrowShares, uint256 _totalCollateral ) { (, , , , VaultAccount memory _totalAsset, VaultAccount memory _totalBorrow) = previewAddInterest(); _totalAssetAmount = _totalAsset.amount; _totalAssetShares = _totalAsset.shares; _totalBorrowAmount = _totalBorrow.amount; _totalBorrowShares = _totalBorrow.shares; _totalCollateral = totalCollateral; } /// @notice The ```toBorrowShares``` function converts a given amount of borrow debt into the number of shares /// @param _amount Amount of borrow /// @param _roundUp Whether to roundup during division /// @param _previewInterest Whether to simulate interest accrual /// @return _shares The number of shares function toBorrowShares( uint256 _amount, bool _roundUp, bool _previewInterest ) external view returns (uint256 _shares) { if (_previewInterest) { (, , , , , VaultAccount memory _totalBorrow) = previewAddInterest(); _shares = _totalBorrow.toShares(_amount, _roundUp); } else { _shares = totalBorrow.toShares(_amount, _roundUp); } } /// @notice The ```toBorrowAmount``` function converts a given amount of borrow debt into the number of shares /// @param _shares Shares of borrow /// @param _roundUp Whether to roundup during division /// @param _previewInterest Whether to simulate interest accrual /// @return _amount The amount of asset function toBorrowAmount( uint256 _shares, bool _roundUp, bool _previewInterest ) external view returns (uint256 _amount) { if (_previewInterest) { (, , , , , VaultAccount memory _totalBorrow) = previewAddInterest(); _amount = _totalBorrow.toAmount(_shares, _roundUp); } else { _amount = totalBorrow.toAmount(_shares, _roundUp); } } /// @notice The ```toAssetAmount``` function converts a given number of shares to an asset amount /// @param _shares Shares of asset (fToken) /// @param _roundUp Whether to round up after division /// @param _previewInterest Whether to preview interest accrual before calculation /// @return _amount The amount of asset function toAssetAmount( uint256 _shares, bool _roundUp, bool _previewInterest ) public view returns (uint256 _amount) { if (_previewInterest) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); _amount = _totalAsset.toAmount(_shares, _roundUp); } else { _amount = totalAsset.toAmount(_shares, _roundUp); } } /// @notice The ```toAssetShares``` function converts a given asset amount to a number of asset shares (fTokens) /// @param _amount The amount of asset /// @param _roundUp Whether to round up after division /// @param _previewInterest Whether to preview interest accrual before calculation /// @return _shares The number of shares (fTokens) function toAssetShares( uint256 _amount, bool _roundUp, bool _previewInterest ) public view returns (uint256 _shares) { if (_previewInterest) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); _shares = _totalAsset.toShares(_amount, _roundUp); } else { _shares = totalAsset.toShares(_amount, _roundUp); } } function convertToAssets(uint256 _shares) external view returns (uint256 _assets) { _assets = toAssetAmount(_shares, false, true); } function convertToShares(uint256 _assets) external view returns (uint256 _shares) { _shares = toAssetShares(_assets, false, true); } function pricePerShare() external view returns (uint256 _amount) { _amount = toAssetAmount(1e18, false, true); } function totalAssets() external view returns (uint256) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); return _totalAsset.amount; } function maxDeposit(address _receiver) public view returns (uint256 _maxAssets) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); _maxAssets = _totalAsset.amount >= depositLimit ? 0 : depositLimit - _totalAsset.amount; } function maxMint(address _receiver) external view returns (uint256 _maxShares) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); uint256 _maxDeposit = _totalAsset.amount >= depositLimit ? 0 : depositLimit - _totalAsset.amount; _maxShares = _totalAsset.toShares(_maxDeposit, false); } function maxWithdraw(address _owner) external view returns (uint256 _maxAssets) { if (isWithdrawPaused) return 0; ( , , uint256 _feesShare, , VaultAccount memory _totalAsset, VaultAccount memory _totalBorrow ) = previewAddInterest(); // Get the owner balance and include the fees share if owner is this contract uint256 _ownerBalance = _owner == address(this) ? balanceOf(_owner) + _feesShare : balanceOf(_owner); // Return the lower of total assets in contract or total assets available to _owner uint256 _totalAssetsAvailable = _totalAssetAvailable(_totalAsset, _totalBorrow); uint256 _totalUserWithdraw = _totalAsset.toAmount(_ownerBalance, false); _maxAssets = _totalAssetsAvailable < _totalUserWithdraw ? _totalAssetsAvailable : _totalUserWithdraw; } function maxRedeem(address _owner) external view returns (uint256 _maxShares) { if (isWithdrawPaused) return 0; ( , , uint256 _feesShare, , VaultAccount memory _totalAsset, VaultAccount memory _totalBorrow ) = previewAddInterest(); // Calculate the total shares available uint256 _totalAssetsAvailable = _totalAssetAvailable(_totalAsset, _totalBorrow); uint256 _totalSharesAvailable = _totalAsset.toShares(_totalAssetsAvailable, false); // Get the owner balance and include the fees share if owner is this contract uint256 _ownerBalance = _owner == address(this) ? balanceOf(_owner) + _feesShare : balanceOf(_owner); _maxShares = _totalSharesAvailable < _ownerBalance ? _totalSharesAvailable : _ownerBalance; } // ============================================================================================ // Functions: Configuration // ============================================================================================ bool public isOracleSetterRevoked; /// @notice The ```RevokeOracleSetter``` event is emitted when the oracle setter is revoked event RevokeOracleInfoSetter(); /// @notice The ```revokeOracleSetter``` function revokes the oracle setter function revokeOracleInfoSetter() external { _requireTimelock(); isOracleSetterRevoked = true; emit RevokeOracleInfoSetter(); } /// @notice The ```SetOracleInfo``` event is emitted when the oracle info (address and max deviation) is set /// @param oldOracle The old oracle address /// @param oldMaxOracleDeviation The old max oracle deviation /// @param newOracle The new oracle address /// @param newMaxOracleDeviation The new max oracle deviation event SetOracleInfo( address oldOracle, uint32 oldMaxOracleDeviation, address newOracle, uint32 newMaxOracleDeviation ); /// @notice The ```setOracleInfo``` function sets the oracle data /// @param _newOracle The new oracle address /// @param _newMaxOracleDeviation The new max oracle deviation function setOracle(address _newOracle, uint32 _newMaxOracleDeviation) external { _requireTimelock(); if (isOracleSetterRevoked) revert SetterRevoked(); ExchangeRateInfo memory _exchangeRateInfo = exchangeRateInfo; emit SetOracleInfo( _exchangeRateInfo.oracle, _exchangeRateInfo.maxOracleDeviation, _newOracle, _newMaxOracleDeviation ); _exchangeRateInfo.oracle = _newOracle; _exchangeRateInfo.maxOracleDeviation = _newMaxOracleDeviation; exchangeRateInfo = _exchangeRateInfo; } bool public isMaxLTVSetterRevoked; /// @notice The ```RevokeMaxLTVSetter``` event is emitted when the max LTV setter is revoked event RevokeMaxLTVSetter(); /// @notice The ```revokeMaxLTVSetter``` function revokes the max LTV setter function revokeMaxLTVSetter() external { _requireTimelock(); isMaxLTVSetterRevoked = true; emit RevokeMaxLTVSetter(); } /// @notice The ```SetMaxLTV``` event is emitted when the max LTV is set /// @param oldMaxLTV The old max LTV /// @param newMaxLTV The new max LTV event SetMaxLTV(uint256 oldMaxLTV, uint256 newMaxLTV); /// @notice The ```setMaxLTV``` function sets the max LTV /// @param _newMaxLTV The new max LTV function setMaxLTV(uint256 _newMaxLTV) external { _requireTimelock(); if (isMaxLTVSetterRevoked) revert SetterRevoked(); emit SetMaxLTV(maxLTV, _newMaxLTV); maxLTV = _newMaxLTV; } bool public isRateContractSetterRevoked; /// @notice The ```RevokeRateContractSetter``` event is emitted when the rate contract setter is revoked event RevokeRateContractSetter(); /// @notice The ```revokeRateContractSetter``` function revokes the rate contract setter function revokeRateContractSetter() external { _requireTimelock(); isRateContractSetterRevoked = true; emit RevokeRateContractSetter(); } /// @notice The ```SetRateContract``` event is emitted when the rate contract is set /// @param oldRateContract The old rate contract /// @param newRateContract The new rate contract event SetRateContract(address oldRateContract, address newRateContract); /// @notice The ```setRateContract``` function sets the rate contract address /// @param _newRateContract The new rate contract address function setRateContract(address _newRateContract) external { _requireTimelock(); if (isRateContractSetterRevoked) revert SetterRevoked(); emit SetRateContract(address(rateContract), _newRateContract); rateContract = IRateCalculatorV2(_newRateContract); } bool public isLiquidationFeeSetterRevoked; /// @notice The ```RevokeLiquidationFeeSetter``` event is emitted when the liquidation fee setter is revoked event RevokeLiquidationFeeSetter(); /// @notice The ```revokeLiquidationFeeSetter``` function revokes the liquidation fee setter function revokeLiquidationFeeSetter() external { _requireTimelock(); isLiquidationFeeSetterRevoked = true; emit RevokeLiquidationFeeSetter(); } /// @notice The ```SetLiquidationFees``` event is emitted when the liquidation fees are set /// @param oldCleanLiquidationFee The old clean liquidation fee /// @param oldDirtyLiquidationFee The old dirty liquidation fee /// @param oldProtocolLiquidationFee The old protocol liquidation fee /// @param newCleanLiquidationFee The new clean liquidation fee /// @param newDirtyLiquidationFee The new dirty liquidation fee /// @param newProtocolLiquidationFee The new protocol liquidation fee event SetLiquidationFees( uint256 oldCleanLiquidationFee, uint256 oldDirtyLiquidationFee, uint256 oldProtocolLiquidationFee, uint256 newCleanLiquidationFee, uint256 newDirtyLiquidationFee, uint256 newProtocolLiquidationFee ); /// @notice The ```setLiquidationFees``` function sets the liquidation fees /// @param _newCleanLiquidationFee The new clean liquidation fee /// @param _newDirtyLiquidationFee The new dirty liquidation fee function setLiquidationFees( uint256 _newCleanLiquidationFee, uint256 _newDirtyLiquidationFee, uint256 _newProtocolLiquidationFee ) external { _requireTimelock(); if (isLiquidationFeeSetterRevoked) revert SetterRevoked(); emit SetLiquidationFees( cleanLiquidationFee, dirtyLiquidationFee, protocolLiquidationFee, _newCleanLiquidationFee, _newDirtyLiquidationFee, _newProtocolLiquidationFee ); cleanLiquidationFee = _newCleanLiquidationFee; dirtyLiquidationFee = _newDirtyLiquidationFee; protocolLiquidationFee = _newProtocolLiquidationFee; } /// @notice The ```ChangeFee``` event first when the fee is changed /// @param newFee The new fee event ChangeFee(uint32 newFee); /// @notice The ```changeFee``` function changes the protocol fee, max 50% /// @param _newFee The new fee function changeFee(uint32 _newFee) external { _requireTimelock(); if (isInterestPaused) revert InterestPaused(); if (_newFee > MAX_PROTOCOL_FEE) { revert BadProtocolFee(); } _addInterest(); currentRateInfo.feeToProtocolRate = _newFee; emit ChangeFee(_newFee); } /// @notice The ```WithdrawFees``` event fires when the fees are withdrawn /// @param shares Number of shares (fTokens) redeemed /// @param recipient To whom the assets were sent /// @param amountToTransfer The amount of fees redeemed event WithdrawFees(uint128 shares, address recipient, uint256 amountToTransfer, uint256 collateralAmount); /// @notice The ```withdrawFees``` function withdraws fees accumulated /// @param _shares Number of fTokens to redeem /// @param _recipient Address to send the assets /// @return _amountToTransfer Amount of assets sent to recipient function withdrawFees(uint128 _shares, address _recipient) external onlyOwner returns (uint256 _amountToTransfer) { if (_recipient == address(0)) revert InvalidReceiver(); // Grab some data from state to save gas VaultAccount memory _totalAsset = totalAsset; // Take all available if 0 value passed if (_shares == 0) _shares = uint128(balanceOf(address(this))); // We must calculate this before we subtract from _totalAsset or invoke _burn _amountToTransfer = _totalAsset.toAmount(_shares, true); _approve(address(this), msg.sender, _shares); _redeem(_totalAsset, _amountToTransfer.toUint128(), _shares, _recipient, address(this)); uint256 _collateralAmount = userCollateralBalance[address(this)]; _removeCollateral(_collateralAmount, _recipient, address(this)); emit WithdrawFees(_shares, _recipient, _amountToTransfer, _collateralAmount); } /// @notice The ```SetSwapper``` event fires whenever a swapper is black or whitelisted /// @param swapper The swapper address /// @param approval The approval event SetSwapper(address swapper, bool approval); /// @notice The ```setSwapper``` function is called to black or whitelist a given swapper address /// @dev /// @param _swapper The swapper address /// @param _approval The approval function setSwapper(address _swapper, bool _approval) external onlyOwner { swappers[_swapper] = _approval; emit SetSwapper(_swapper, _approval); } // ============================================================================================ // Functions: Access Control // ============================================================================================ /// @notice The ```pause``` function is called to pause all contract functionality function pause() external { _requireProtocolOrOwner(); if (!isBorrowAccessControlRevoked) _setBorrowLimit(0); if (!isDepositAccessControlRevoked) _setDepositLimit(0); if (!isRepayAccessControlRevoked) _pauseRepay(true); if (!isWithdrawAccessControlRevoked) _pauseWithdraw(true); if (!isLiquidateAccessControlRevoked) _pauseLiquidate(true); if (!isInterestAccessControlRevoked) { _addInterest(); _pauseInterest(true); } } /// @notice The ```unpause``` function is called to unpause all contract functionality function unpause() external { _requireTimelockOrOwner(); if (!isBorrowAccessControlRevoked) _setBorrowLimit(type(uint256).max); if (!isDepositAccessControlRevoked) _setDepositLimit(type(uint256).max); if (!isRepayAccessControlRevoked) _pauseRepay(false); if (!isWithdrawAccessControlRevoked) _pauseWithdraw(false); if (!isLiquidateAccessControlRevoked) _pauseLiquidate(false); if (!isInterestAccessControlRevoked) { _addInterest(); _pauseInterest(false); } } /// @notice The ```pauseBorrow``` function sets borrow limit to 0 function pauseBorrow() external { _requireProtocolOrOwner(); if (isBorrowAccessControlRevoked) revert AccessControlRevoked(); _setBorrowLimit(0); } /// @notice The ```setBorrowLimit``` function sets the borrow limit /// @param _limit The new borrow limit function setBorrowLimit(uint256 _limit) external { _requireTimelockOrOwner(); if (isBorrowAccessControlRevoked) revert AccessControlRevoked(); _setBorrowLimit(_limit); } /// @notice The ```revokeBorrowLimitAccessControl``` function revokes borrow limit access control /// @param _borrowLimit The new borrow limit function revokeBorrowLimitAccessControl(uint256 _borrowLimit) external { _requireTimelock(); _revokeBorrowAccessControl(_borrowLimit); } /// @notice The ```pauseDeposit``` function pauses deposit functionality function pauseDeposit() external { _requireProtocolOrOwner(); if (isDepositAccessControlRevoked) revert AccessControlRevoked(); _setDepositLimit(0); } /// @notice The ```setDepositLimit``` function sets the deposit limit /// @param _limit The new deposit limit function setDepositLimit(uint256 _limit) external { _requireTimelockOrOwner(); if (isDepositAccessControlRevoked) revert AccessControlRevoked(); _setDepositLimit(_limit); } /// @notice The ```revokeDepositLimitAccessControl``` function revokes deposit limit access control /// @param _depositLimit The new deposit limit function revokeDepositLimitAccessControl(uint256 _depositLimit) external { _requireTimelock(); _revokeDepositAccessControl(_depositLimit); } /// @notice The ```pauseRepay``` function pauses repay functionality /// @param _isPaused The new pause state function pauseRepay(bool _isPaused) external { if (_isPaused) { _requireProtocolOrOwner(); } else { _requireTimelockOrOwner(); } if (isRepayAccessControlRevoked) revert AccessControlRevoked(); _pauseRepay(_isPaused); } /// @notice The ```revokeRepayAccessControl``` function revokes repay access control function revokeRepayAccessControl() external { _requireTimelock(); _revokeRepayAccessControl(); } /// @notice The ```pauseWithdraw``` function pauses withdraw functionality /// @param _isPaused The new pause state function pauseWithdraw(bool _isPaused) external { if (_isPaused) { _requireProtocolOrOwner(); } else { _requireTimelockOrOwner(); } if (isWithdrawAccessControlRevoked) revert AccessControlRevoked(); _pauseWithdraw(_isPaused); } /// @notice The ```revokeWithdrawAccessControl``` function revokes withdraw access control function revokeWithdrawAccessControl() external { _requireTimelock(); _revokeWithdrawAccessControl(); } /// @notice The ```pauseLiquidate``` function pauses liquidate functionality /// @param _isPaused The new pause state function pauseLiquidate(bool _isPaused) external { if (_isPaused) { _requireProtocolOrOwner(); } else { _requireTimelockOrOwner(); } if (isLiquidateAccessControlRevoked) revert AccessControlRevoked(); _pauseLiquidate(_isPaused); } /// @notice The ```revokeLiquidateAccessControl``` function revokes liquidate access control function revokeLiquidateAccessControl() external { _requireTimelock(); _revokeLiquidateAccessControl(); } /// @notice The ```pauseInterest``` function pauses interest functionality /// @param _isPaused The new pause state function pauseInterest(bool _isPaused) external { if (_isPaused) { _requireProtocolOrOwner(); } else { _requireTimelockOrOwner(); } if (isInterestAccessControlRevoked) revert AccessControlRevoked(); // Resets the lastTimestamp which has the effect of no interest accruing over the pause period _addInterest(); _pauseInterest(_isPaused); } /// @notice The ```revokeInterestAccessControl``` function revokes interest access control function revokeInterestAccessControl() external { _requireTimelock(); _revokeInterestAccessControl(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (access/Ownable2Step.sol) pragma solidity ^0.8.0; import "./Ownable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2Step is Ownable { address private _pendingOwner; event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { return _pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { _pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { delete _pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() external { address sender = _msgSender(); require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner"); _transferOwnership(sender); } }
// 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 // OpenZeppelin Contracts (last updated v4.8.0) (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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-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. */ 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]. */ 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 v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (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 v4.8.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/draft-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; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } 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"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return 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 v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol) // This file was procedurally generated from scripts/generate/templates/SafeCast.js. pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. * * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing * all math on `uint256` and `int256` and then downcasting. */ library SafeCast { /** * @dev Returns the downcasted uint248 from uint256, reverting on * overflow (when the input is greater than largest uint248). * * Counterpart to Solidity's `uint248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toUint248(uint256 value) internal pure returns (uint248) { require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits"); return uint248(value); } /** * @dev Returns the downcasted uint240 from uint256, reverting on * overflow (when the input is greater than largest uint240). * * Counterpart to Solidity's `uint240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toUint240(uint256 value) internal pure returns (uint240) { require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits"); return uint240(value); } /** * @dev Returns the downcasted uint232 from uint256, reverting on * overflow (when the input is greater than largest uint232). * * Counterpart to Solidity's `uint232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toUint232(uint256 value) internal pure returns (uint232) { require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits"); return uint232(value); } /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.2._ */ function toUint224(uint256 value) internal pure returns (uint224) { require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits"); return uint224(value); } /** * @dev Returns the downcasted uint216 from uint256, reverting on * overflow (when the input is greater than largest uint216). * * Counterpart to Solidity's `uint216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toUint216(uint256 value) internal pure returns (uint216) { require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits"); return uint216(value); } /** * @dev Returns the downcasted uint208 from uint256, reverting on * overflow (when the input is greater than largest uint208). * * Counterpart to Solidity's `uint208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toUint208(uint256 value) internal pure returns (uint208) { require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits"); return uint208(value); } /** * @dev Returns the downcasted uint200 from uint256, reverting on * overflow (when the input is greater than largest uint200). * * Counterpart to Solidity's `uint200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toUint200(uint256 value) internal pure returns (uint200) { require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits"); return uint200(value); } /** * @dev Returns the downcasted uint192 from uint256, reverting on * overflow (when the input is greater than largest uint192). * * Counterpart to Solidity's `uint192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toUint192(uint256 value) internal pure returns (uint192) { require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits"); return uint192(value); } /** * @dev Returns the downcasted uint184 from uint256, reverting on * overflow (when the input is greater than largest uint184). * * Counterpart to Solidity's `uint184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toUint184(uint256 value) internal pure returns (uint184) { require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits"); return uint184(value); } /** * @dev Returns the downcasted uint176 from uint256, reverting on * overflow (when the input is greater than largest uint176). * * Counterpart to Solidity's `uint176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toUint176(uint256 value) internal pure returns (uint176) { require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits"); return uint176(value); } /** * @dev Returns the downcasted uint168 from uint256, reverting on * overflow (when the input is greater than largest uint168). * * Counterpart to Solidity's `uint168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toUint168(uint256 value) internal pure returns (uint168) { require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits"); return uint168(value); } /** * @dev Returns the downcasted uint160 from uint256, reverting on * overflow (when the input is greater than largest uint160). * * Counterpart to Solidity's `uint160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toUint160(uint256 value) internal pure returns (uint160) { require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits"); return uint160(value); } /** * @dev Returns the downcasted uint152 from uint256, reverting on * overflow (when the input is greater than largest uint152). * * Counterpart to Solidity's `uint152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toUint152(uint256 value) internal pure returns (uint152) { require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits"); return uint152(value); } /** * @dev Returns the downcasted uint144 from uint256, reverting on * overflow (when the input is greater than largest uint144). * * Counterpart to Solidity's `uint144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toUint144(uint256 value) internal pure returns (uint144) { require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits"); return uint144(value); } /** * @dev Returns the downcasted uint136 from uint256, reverting on * overflow (when the input is greater than largest uint136). * * Counterpart to Solidity's `uint136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toUint136(uint256 value) internal pure returns (uint136) { require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits"); return uint136(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v2.5._ */ function toUint128(uint256 value) internal pure returns (uint128) { require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint120 from uint256, reverting on * overflow (when the input is greater than largest uint120). * * Counterpart to Solidity's `uint120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toUint120(uint256 value) internal pure returns (uint120) { require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits"); return uint120(value); } /** * @dev Returns the downcasted uint112 from uint256, reverting on * overflow (when the input is greater than largest uint112). * * Counterpart to Solidity's `uint112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toUint112(uint256 value) internal pure returns (uint112) { require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits"); return uint112(value); } /** * @dev Returns the downcasted uint104 from uint256, reverting on * overflow (when the input is greater than largest uint104). * * Counterpart to Solidity's `uint104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toUint104(uint256 value) internal pure returns (uint104) { require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits"); return uint104(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.2._ */ function toUint96(uint256 value) internal pure returns (uint96) { require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits"); return uint96(value); } /** * @dev Returns the downcasted uint88 from uint256, reverting on * overflow (when the input is greater than largest uint88). * * Counterpart to Solidity's `uint88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toUint88(uint256 value) internal pure returns (uint88) { require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits"); return uint88(value); } /** * @dev Returns the downcasted uint80 from uint256, reverting on * overflow (when the input is greater than largest uint80). * * Counterpart to Solidity's `uint80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toUint80(uint256 value) internal pure returns (uint80) { require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits"); return uint80(value); } /** * @dev Returns the downcasted uint72 from uint256, reverting on * overflow (when the input is greater than largest uint72). * * Counterpart to Solidity's `uint72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toUint72(uint256 value) internal pure returns (uint72) { require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits"); return uint72(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v2.5._ */ function toUint64(uint256 value) internal pure returns (uint64) { require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint56 from uint256, reverting on * overflow (when the input is greater than largest uint56). * * Counterpart to Solidity's `uint56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toUint56(uint256 value) internal pure returns (uint56) { require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits"); return uint56(value); } /** * @dev Returns the downcasted uint48 from uint256, reverting on * overflow (when the input is greater than largest uint48). * * Counterpart to Solidity's `uint48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toUint48(uint256 value) internal pure returns (uint48) { require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits"); return uint48(value); } /** * @dev Returns the downcasted uint40 from uint256, reverting on * overflow (when the input is greater than largest uint40). * * Counterpart to Solidity's `uint40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toUint40(uint256 value) internal pure returns (uint40) { require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits"); return uint40(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v2.5._ */ function toUint32(uint256 value) internal pure returns (uint32) { require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint24 from uint256, reverting on * overflow (when the input is greater than largest uint24). * * Counterpart to Solidity's `uint24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toUint24(uint256 value) internal pure returns (uint24) { require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits"); return uint24(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v2.5._ */ function toUint16(uint256 value) internal pure returns (uint16) { require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v2.5._ */ function toUint8(uint256 value) internal pure returns (uint8) { require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. * * _Available since v3.0._ */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Returns the downcasted int248 from int256, reverting on * overflow (when the input is less than smallest int248 or * greater than largest int248). * * Counterpart to Solidity's `int248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toInt248(int256 value) internal pure returns (int248 downcasted) { downcasted = int248(value); require(downcasted == value, "SafeCast: value doesn't fit in 248 bits"); } /** * @dev Returns the downcasted int240 from int256, reverting on * overflow (when the input is less than smallest int240 or * greater than largest int240). * * Counterpart to Solidity's `int240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toInt240(int256 value) internal pure returns (int240 downcasted) { downcasted = int240(value); require(downcasted == value, "SafeCast: value doesn't fit in 240 bits"); } /** * @dev Returns the downcasted int232 from int256, reverting on * overflow (when the input is less than smallest int232 or * greater than largest int232). * * Counterpart to Solidity's `int232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toInt232(int256 value) internal pure returns (int232 downcasted) { downcasted = int232(value); require(downcasted == value, "SafeCast: value doesn't fit in 232 bits"); } /** * @dev Returns the downcasted int224 from int256, reverting on * overflow (when the input is less than smallest int224 or * greater than largest int224). * * Counterpart to Solidity's `int224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.7._ */ function toInt224(int256 value) internal pure returns (int224 downcasted) { downcasted = int224(value); require(downcasted == value, "SafeCast: value doesn't fit in 224 bits"); } /** * @dev Returns the downcasted int216 from int256, reverting on * overflow (when the input is less than smallest int216 or * greater than largest int216). * * Counterpart to Solidity's `int216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toInt216(int256 value) internal pure returns (int216 downcasted) { downcasted = int216(value); require(downcasted == value, "SafeCast: value doesn't fit in 216 bits"); } /** * @dev Returns the downcasted int208 from int256, reverting on * overflow (when the input is less than smallest int208 or * greater than largest int208). * * Counterpart to Solidity's `int208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toInt208(int256 value) internal pure returns (int208 downcasted) { downcasted = int208(value); require(downcasted == value, "SafeCast: value doesn't fit in 208 bits"); } /** * @dev Returns the downcasted int200 from int256, reverting on * overflow (when the input is less than smallest int200 or * greater than largest int200). * * Counterpart to Solidity's `int200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toInt200(int256 value) internal pure returns (int200 downcasted) { downcasted = int200(value); require(downcasted == value, "SafeCast: value doesn't fit in 200 bits"); } /** * @dev Returns the downcasted int192 from int256, reverting on * overflow (when the input is less than smallest int192 or * greater than largest int192). * * Counterpart to Solidity's `int192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toInt192(int256 value) internal pure returns (int192 downcasted) { downcasted = int192(value); require(downcasted == value, "SafeCast: value doesn't fit in 192 bits"); } /** * @dev Returns the downcasted int184 from int256, reverting on * overflow (when the input is less than smallest int184 or * greater than largest int184). * * Counterpart to Solidity's `int184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toInt184(int256 value) internal pure returns (int184 downcasted) { downcasted = int184(value); require(downcasted == value, "SafeCast: value doesn't fit in 184 bits"); } /** * @dev Returns the downcasted int176 from int256, reverting on * overflow (when the input is less than smallest int176 or * greater than largest int176). * * Counterpart to Solidity's `int176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toInt176(int256 value) internal pure returns (int176 downcasted) { downcasted = int176(value); require(downcasted == value, "SafeCast: value doesn't fit in 176 bits"); } /** * @dev Returns the downcasted int168 from int256, reverting on * overflow (when the input is less than smallest int168 or * greater than largest int168). * * Counterpart to Solidity's `int168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toInt168(int256 value) internal pure returns (int168 downcasted) { downcasted = int168(value); require(downcasted == value, "SafeCast: value doesn't fit in 168 bits"); } /** * @dev Returns the downcasted int160 from int256, reverting on * overflow (when the input is less than smallest int160 or * greater than largest int160). * * Counterpart to Solidity's `int160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toInt160(int256 value) internal pure returns (int160 downcasted) { downcasted = int160(value); require(downcasted == value, "SafeCast: value doesn't fit in 160 bits"); } /** * @dev Returns the downcasted int152 from int256, reverting on * overflow (when the input is less than smallest int152 or * greater than largest int152). * * Counterpart to Solidity's `int152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toInt152(int256 value) internal pure returns (int152 downcasted) { downcasted = int152(value); require(downcasted == value, "SafeCast: value doesn't fit in 152 bits"); } /** * @dev Returns the downcasted int144 from int256, reverting on * overflow (when the input is less than smallest int144 or * greater than largest int144). * * Counterpart to Solidity's `int144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toInt144(int256 value) internal pure returns (int144 downcasted) { downcasted = int144(value); require(downcasted == value, "SafeCast: value doesn't fit in 144 bits"); } /** * @dev Returns the downcasted int136 from int256, reverting on * overflow (when the input is less than smallest int136 or * greater than largest int136). * * Counterpart to Solidity's `int136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toInt136(int256 value) internal pure returns (int136 downcasted) { downcasted = int136(value); require(downcasted == value, "SafeCast: value doesn't fit in 136 bits"); } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v3.1._ */ function toInt128(int256 value) internal pure returns (int128 downcasted) { downcasted = int128(value); require(downcasted == value, "SafeCast: value doesn't fit in 128 bits"); } /** * @dev Returns the downcasted int120 from int256, reverting on * overflow (when the input is less than smallest int120 or * greater than largest int120). * * Counterpart to Solidity's `int120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toInt120(int256 value) internal pure returns (int120 downcasted) { downcasted = int120(value); require(downcasted == value, "SafeCast: value doesn't fit in 120 bits"); } /** * @dev Returns the downcasted int112 from int256, reverting on * overflow (when the input is less than smallest int112 or * greater than largest int112). * * Counterpart to Solidity's `int112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toInt112(int256 value) internal pure returns (int112 downcasted) { downcasted = int112(value); require(downcasted == value, "SafeCast: value doesn't fit in 112 bits"); } /** * @dev Returns the downcasted int104 from int256, reverting on * overflow (when the input is less than smallest int104 or * greater than largest int104). * * Counterpart to Solidity's `int104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toInt104(int256 value) internal pure returns (int104 downcasted) { downcasted = int104(value); require(downcasted == value, "SafeCast: value doesn't fit in 104 bits"); } /** * @dev Returns the downcasted int96 from int256, reverting on * overflow (when the input is less than smallest int96 or * greater than largest int96). * * Counterpart to Solidity's `int96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.7._ */ function toInt96(int256 value) internal pure returns (int96 downcasted) { downcasted = int96(value); require(downcasted == value, "SafeCast: value doesn't fit in 96 bits"); } /** * @dev Returns the downcasted int88 from int256, reverting on * overflow (when the input is less than smallest int88 or * greater than largest int88). * * Counterpart to Solidity's `int88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toInt88(int256 value) internal pure returns (int88 downcasted) { downcasted = int88(value); require(downcasted == value, "SafeCast: value doesn't fit in 88 bits"); } /** * @dev Returns the downcasted int80 from int256, reverting on * overflow (when the input is less than smallest int80 or * greater than largest int80). * * Counterpart to Solidity's `int80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toInt80(int256 value) internal pure returns (int80 downcasted) { downcasted = int80(value); require(downcasted == value, "SafeCast: value doesn't fit in 80 bits"); } /** * @dev Returns the downcasted int72 from int256, reverting on * overflow (when the input is less than smallest int72 or * greater than largest int72). * * Counterpart to Solidity's `int72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toInt72(int256 value) internal pure returns (int72 downcasted) { downcasted = int72(value); require(downcasted == value, "SafeCast: value doesn't fit in 72 bits"); } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v3.1._ */ function toInt64(int256 value) internal pure returns (int64 downcasted) { downcasted = int64(value); require(downcasted == value, "SafeCast: value doesn't fit in 64 bits"); } /** * @dev Returns the downcasted int56 from int256, reverting on * overflow (when the input is less than smallest int56 or * greater than largest int56). * * Counterpart to Solidity's `int56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toInt56(int256 value) internal pure returns (int56 downcasted) { downcasted = int56(value); require(downcasted == value, "SafeCast: value doesn't fit in 56 bits"); } /** * @dev Returns the downcasted int48 from int256, reverting on * overflow (when the input is less than smallest int48 or * greater than largest int48). * * Counterpart to Solidity's `int48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toInt48(int256 value) internal pure returns (int48 downcasted) { downcasted = int48(value); require(downcasted == value, "SafeCast: value doesn't fit in 48 bits"); } /** * @dev Returns the downcasted int40 from int256, reverting on * overflow (when the input is less than smallest int40 or * greater than largest int40). * * Counterpart to Solidity's `int40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toInt40(int256 value) internal pure returns (int40 downcasted) { downcasted = int40(value); require(downcasted == value, "SafeCast: value doesn't fit in 40 bits"); } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v3.1._ */ function toInt32(int256 value) internal pure returns (int32 downcasted) { downcasted = int32(value); require(downcasted == value, "SafeCast: value doesn't fit in 32 bits"); } /** * @dev Returns the downcasted int24 from int256, reverting on * overflow (when the input is less than smallest int24 or * greater than largest int24). * * Counterpart to Solidity's `int24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toInt24(int256 value) internal pure returns (int24 downcasted) { downcasted = int24(value); require(downcasted == value, "SafeCast: value doesn't fit in 24 bits"); } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v3.1._ */ function toInt16(int256 value) internal pure returns (int16 downcasted) { downcasted = int16(value); require(downcasted == value, "SafeCast: value doesn't fit in 16 bits"); } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v3.1._ */ function toInt8(int256 value) internal pure returns (int8 downcasted) { downcasted = int8(value); require(downcasted == value, "SafeCast: value doesn't fit in 8 bits"); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. * * _Available since v3.0._ */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256"); return int256(value); } }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; // ==================================================================== // | ______ _______ | // | / _____________ __ __ / ____(_____ ____ _____ ________ | // | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ | // | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ | // | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ | // | | // ==================================================================== // ==================== FraxlendPairAccessControl ===================== // ==================================================================== // Frax Finance: https://github.com/FraxFinance // Primary Author // Drake Evans: https://github.com/DrakeEvans // Reviewers // Dennis: https://github.com/denett // ==================================================================== import "@openzeppelin/contracts/access/Ownable2Step.sol"; import "./Timelock2Step.sol"; import "./FraxlendPairAccessControlErrors.sol"; /// @title FraxlendPairAccessControl /// @author Drake Evans (Frax Finance) https://github.com/drakeevans /// @notice An abstract contract which contains the access control logic for FraxlendPair abstract contract FraxlendPairAccessControl is Timelock2Step, Ownable2Step, FraxlendPairAccessControlErrors { // Deployer address public immutable DEPLOYER_ADDRESS; // Admin contracts address public circuitBreakerAddress; // access control uint256 public borrowLimit = type(uint256).max; bool public isBorrowAccessControlRevoked; uint256 public depositLimit = type(uint256).max; bool public isDepositAccessControlRevoked; bool public isRepayPaused; bool public isRepayAccessControlRevoked; bool public isWithdrawPaused; bool public isWithdrawAccessControlRevoked; bool public isLiquidatePaused; bool public isLiquidateAccessControlRevoked; bool public isInterestPaused; bool public isInterestAccessControlRevoked; /// @param _immutables abi.encode(address _circuitBreakerAddress, address _comptrollerAddress, address _timelockAddress) constructor(bytes memory _immutables) Timelock2Step() Ownable() { // Handle Immutables Configuration (address _circuitBreakerAddress, address _comptrollerAddress, address _timelockAddress) = abi.decode( _immutables, (address, address, address) ); _setTimelock(_timelockAddress); _transferOwnership(_comptrollerAddress); // Deployer contract DEPLOYER_ADDRESS = msg.sender; circuitBreakerAddress = _circuitBreakerAddress; } // ============================================================================================ // Functions: Access Control // ============================================================================================ function _requireProtocolOrOwner() internal view { if ( msg.sender != circuitBreakerAddress && msg.sender != owner() && msg.sender != DEPLOYER_ADDRESS && msg.sender != timelockAddress ) { revert OnlyProtocolOrOwner(); } } function _requireTimelockOrOwner() internal view { if (msg.sender != owner() && msg.sender != timelockAddress) { revert OnlyTimelockOrOwner(); } } /// @notice The ```RevokeBorrowAccessControl``` event is emitted when access to borrow limit is revoked /// @param borrowLimit The final permanent borrow limit event RevokeBorrowAccessControl(uint256 borrowLimit); function _revokeBorrowAccessControl(uint256 _borrowLimit) internal { isBorrowAccessControlRevoked = true; borrowLimit = _borrowLimit; emit RevokeBorrowAccessControl(_borrowLimit); } /// @notice The ```SetBorrowLimit``` event is emitted when the borrow limit is set /// @param limit The new borrow limit event SetBorrowLimit(uint256 limit); function _setBorrowLimit(uint256 _limit) internal { borrowLimit = _limit; emit SetBorrowLimit(_limit); } /// @notice The ```RevokeDepositAccessControl``` event is emitted when access to deposit limit is revoked /// @param depositLimit The final permanent deposit limit event RevokeDepositAccessControl(uint256 depositLimit); function _revokeDepositAccessControl(uint256 _depositLimit) internal { isDepositAccessControlRevoked = true; depositLimit = _depositLimit; emit RevokeDepositAccessControl(_depositLimit); } /// @notice The ```SetDepositLimit``` event is emitted when the deposit limit is set /// @param limit The new deposit limit event SetDepositLimit(uint256 limit); function _setDepositLimit(uint256 _limit) internal { depositLimit = _limit; emit SetDepositLimit(_limit); } /// @notice The ```RevokeRepayAccessControl``` event is emitted when repay access control is revoked event RevokeRepayAccessControl(); function _revokeRepayAccessControl() internal { isRepayAccessControlRevoked = true; emit RevokeRepayAccessControl(); } /// @notice The ```PauseRepay``` event is emitted when repay is paused or unpaused /// @param isPaused The new paused state event PauseRepay(bool isPaused); function _pauseRepay(bool _isPaused) internal { isRepayPaused = _isPaused; emit PauseRepay(_isPaused); } /// @notice The ```RevokeWithdrawAccessControl``` event is emitted when withdraw access control is revoked event RevokeWithdrawAccessControl(); function _revokeWithdrawAccessControl() internal { isWithdrawAccessControlRevoked = true; emit RevokeWithdrawAccessControl(); } /// @notice The ```PauseWithdraw``` event is emitted when withdraw is paused or unpaused /// @param isPaused The new paused state event PauseWithdraw(bool isPaused); function _pauseWithdraw(bool _isPaused) internal { isWithdrawPaused = _isPaused; emit PauseWithdraw(_isPaused); } /// @notice The ```RevokeLiquidateAccessControl``` event is emitted when liquidate access control is revoked event RevokeLiquidateAccessControl(); function _revokeLiquidateAccessControl() internal { isLiquidateAccessControlRevoked = true; emit RevokeLiquidateAccessControl(); } /// @notice The ```PauseLiquidate``` event is emitted when liquidate is paused or unpaused /// @param isPaused The new paused state event PauseLiquidate(bool isPaused); function _pauseLiquidate(bool _isPaused) internal { isLiquidatePaused = _isPaused; emit PauseLiquidate(_isPaused); } /// @notice The ```RevokeInterestAccessControl``` event is emitted when interest access control is revoked event RevokeInterestAccessControl(); function _revokeInterestAccessControl() internal { isInterestAccessControlRevoked = true; emit RevokeInterestAccessControl(); } /// @notice The ```PauseInterest``` event is emitted when interest is paused or unpaused /// @param isPaused The new paused state event PauseInterest(bool isPaused); function _pauseInterest(bool _isPaused) internal { isInterestPaused = _isPaused; emit PauseInterest(_isPaused); } /// @notice The ```SetCircuitBreaker``` event is emitted when the circuit breaker address is set /// @param oldCircuitBreaker The old circuit breaker address /// @param newCircuitBreaker The new circuit breaker address event SetCircuitBreaker(address oldCircuitBreaker, address newCircuitBreaker); /// @notice The ```_setCircuitBreaker``` function is called to set the circuit breaker address /// @param _newCircuitBreaker The new circuit breaker address function _setCircuitBreaker(address _newCircuitBreaker) internal { address oldCircuitBreaker = circuitBreakerAddress; circuitBreakerAddress = _newCircuitBreaker; emit SetCircuitBreaker(oldCircuitBreaker, _newCircuitBreaker); } /// @notice The ```setCircuitBreaker``` function is called to set the circuit breaker address /// @param _newCircuitBreaker The new circuit breaker address function setCircuitBreaker(address _newCircuitBreaker) external virtual { _requireTimelock(); _setCircuitBreaker(_newCircuitBreaker); } }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; // ==================================================================== // | ______ _______ | // | / _____________ __ __ / ____(_____ ____ _____ ________ | // | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ | // | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ | // | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ | // | | // ==================================================================== // ================ FraxlendPairAccessControlErrors =================== // ==================================================================== // Frax Finance: https://github.com/FraxFinance // Primary Author // Drake Evans: https://github.com/DrakeEvans // Reviewers // Dennis: https://github.com/denett // ==================================================================== /// @title FraxlendPairAccessControlErrors /// @author Drake Evans (Frax Finance) https://github.com/drakeevans /// @notice An abstract contract which contains the errors for the Access Control contract abstract contract FraxlendPairAccessControlErrors { error OnlyProtocolOrOwner(); error OnlyTimelockOrOwner(); error ExceedsBorrowLimit(); error AccessControlRevoked(); error RepayPaused(); error ExceedsDepositLimit(); error WithdrawPaused(); error LiquidatePaused(); error InterestPaused(); }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; // ==================================================================== // | ______ _______ | // | / _____________ __ __ / ____(_____ ____ _____ ________ | // | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ | // | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ | // | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ | // | | // ==================================================================== // ===================== FraxlendPairConstants ======================== // ==================================================================== // Frax Finance: https://github.com/FraxFinance // Primary Author // Drake Evans: https://github.com/DrakeEvans // Reviewers // Dennis: https://github.com/denett // Sam Kazemian: https://github.com/samkazemian // Travis Moore: https://github.com/FortisFortuna // Jack Corddry: https://github.com/corddry // Rich Gee: https://github.com/zer0blockchain // ==================================================================== /// @title FraxlendPairConstants /// @author Drake Evans (Frax Finance) https://github.com/drakeevans /// @notice An abstract contract which contains the errors and constants for the FraxlendPair contract abstract contract FraxlendPairConstants { // ============================================================================================ // Constants // ============================================================================================ // Precision settings uint256 public constant LTV_PRECISION = 1e5; // 5 decimals uint256 public constant LIQ_PRECISION = 1e5; uint256 public constant UTIL_PREC = 1e5; uint256 public constant FEE_PRECISION = 1e5; uint256 public constant EXCHANGE_PRECISION = 1e18; uint256 public constant DEVIATION_PRECISION = 1e5; uint256 public constant RATE_PRECISION = 1e18; // Protocol Fee uint256 public constant MAX_PROTOCOL_FEE = 5e4; // 50% 1e5 precision error Insolvent(uint256 _borrow, uint256 _collateral, uint256 _exchangeRate); error BorrowerSolvent(); error InsufficientAssetsInContract(uint256 _assets, uint256 _request); error SlippageTooHigh(uint256 _minOut, uint256 _actual); error BadSwapper(); error InvalidPath(address _expected, address _actual); error BadProtocolFee(); error PastDeadline(uint256 _blockTimestamp, uint256 _deadline); error SetterRevoked(); error ExceedsMaxOracleDeviation(); error InvalidReceiver(); }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; // ==================================================================== // | ______ _______ | // | / _____________ __ __ / ____(_____ ____ _____ ________ | // | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ | // | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ | // | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ | // | | // ==================================================================== // ========================= FraxlendPairCore ========================= // ==================================================================== // Frax Finance: https://github.com/FraxFinance // Primary Author // Drake Evans: https://github.com/DrakeEvans // Reviewers // Dennis: https://github.com/denett // Sam Kazemian: https://github.com/samkazemian // Travis Moore: https://github.com/FortisFortuna // Jack Corddry: https://github.com/corddry // Rich Gee: https://github.com/zer0blockchain // ==================================================================== import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/utils/math/SafeCast.sol"; import "./FraxlendPairAccessControl.sol"; import "./FraxlendPairConstants.sol"; import "./libraries/VaultAccount.sol"; import "./libraries/SafeERC20.sol"; import "./interfaces/IDualOracle.sol"; import "./interfaces/IRateCalculatorV2.sol"; import "./interfaces/ISwapper.sol"; /// @title FraxlendPairCore /// @author Drake Evans (Frax Finance) https://github.com/drakeevans /// @notice An abstract contract which contains the core logic and storage for the FraxlendPair abstract contract FraxlendPairCore is FraxlendPairAccessControl, FraxlendPairConstants, ERC20, ReentrancyGuard { using VaultAccountingLibrary for VaultAccount; using SafeERC20 for IERC20; using SafeCast for uint256; function version() external pure returns (uint256 _major, uint256 _minor, uint256 _patch) { _major = 3; _minor = 0; _patch = 0; } // ============================================================================================ // Settings set by constructor() // ============================================================================================ // Asset and collateral contracts IERC20 internal immutable assetContract; IERC20 public immutable collateralContract; // LTV Settings /// @notice The maximum LTV allowed for this pair /// @dev 1e5 precision uint256 public maxLTV; // Liquidation Fees /// @notice The liquidation fee, given as a % of repayment amount, when all collateral is consumed in liquidation /// @dev 1e5 precision uint256 public cleanLiquidationFee; /// @notice The liquidation fee, given as % of repayment amount, when some collateral remains for borrower /// @dev 1e5 precision uint256 public dirtyLiquidationFee; /// @notice The portion of the liquidation fee given to protocol /// @dev 1e5 precision uint256 public protocolLiquidationFee; // Interest Rate Calculator Contract IRateCalculatorV2 public rateContract; // For complex rate calculations // Swapper mapping(address => bool) public swappers; // approved swapper addresses // ERC20 Metadata string internal nameOfContract; string internal symbolOfContract; uint8 internal immutable decimalsOfContract; // ============================================================================================ // Storage // ============================================================================================ /// @notice Stores information about the current interest rate /// @dev struct is packed to reduce SLOADs. feeToProtocolRate is 1e5 precision, ratePerSec & fullUtilizationRate is 1e18 precision CurrentRateInfo public currentRateInfo; struct CurrentRateInfo { uint32 lastBlock; uint32 feeToProtocolRate; // Fee amount 1e5 precision uint64 lastTimestamp; uint64 ratePerSec; uint64 fullUtilizationRate; } /// @notice Stores information about the current exchange rate. Collateral:Asset ratio /// @dev Struct packed to save SLOADs. Amount of Collateral Token to buy 1e18 Asset Token ExchangeRateInfo public exchangeRateInfo; struct ExchangeRateInfo { address oracle; uint32 maxOracleDeviation; // % of larger number, 1e5 precision uint184 lastTimestamp; uint256 lowExchangeRate; uint256 highExchangeRate; } // Contract Level Accounting VaultAccount public totalAsset; // amount = total amount of assets, shares = total shares outstanding VaultAccount public totalBorrow; // amount = total borrow amount with interest accrued, shares = total shares outstanding uint256 public totalCollateral; // total amount of collateral in contract // User Level Accounting /// @notice Stores the balance of collateral for each user mapping(address => uint256) public userCollateralBalance; // amount of collateral each user is backed /// @notice Stores the balance of borrow shares for each user mapping(address => uint256) public userBorrowShares; // represents the shares held by individuals // NOTE: user shares of assets are represented as ERC-20 tokens and accessible via balanceOf() // ============================================================================================ // Constructor // ============================================================================================ /// @notice The ```constructor``` function is called on deployment /// @param _configData abi.encode(address _asset, address _collateral, address _oracle, uint32 _maxOracleDeviation, address _rateContract, uint64 _fullUtilizationRate, uint256 _maxLTV, uint256 _cleanLiquidationFee, uint256 _dirtyLiquidationFee, uint256 _protocolLiquidationFee) /// @param _immutables abi.encode(address _circuitBreakerAddress, address _comptrollerAddress, address _timelockAddress) /// @param _customConfigData abi.encode(string memory _nameOfContract, string memory _symbolOfContract, uint8 _decimalsOfContract) constructor( bytes memory _configData, bytes memory _immutables, bytes memory _customConfigData ) FraxlendPairAccessControl(_immutables) ERC20("", "") { { ( address _asset, address _collateral, address _oracle, uint32 _maxOracleDeviation, address _rateContract, uint64 _fullUtilizationRate, uint256 _maxLTV, uint256 _liquidationFee, uint256 _protocolLiquidationFee ) = abi.decode( _configData, (address, address, address, uint32, address, uint64, uint256, uint256, uint256) ); // Pair Settings assetContract = IERC20(_asset); collateralContract = IERC20(_collateral); currentRateInfo.feeToProtocolRate = 0; currentRateInfo.fullUtilizationRate = _fullUtilizationRate; currentRateInfo.lastTimestamp = uint64(block.timestamp - 1); currentRateInfo.lastBlock = uint32(block.number - 1); exchangeRateInfo.oracle = _oracle; exchangeRateInfo.maxOracleDeviation = _maxOracleDeviation; rateContract = IRateCalculatorV2(_rateContract); //Liquidation Fee Settings cleanLiquidationFee = _liquidationFee; dirtyLiquidationFee = (_liquidationFee * 90_000) / LIQ_PRECISION; // 90% of clean fee protocolLiquidationFee = _protocolLiquidationFee; // set maxLTV maxLTV = _maxLTV; } { (string memory _nameOfContract, string memory _symbolOfContract, uint8 _decimalsOfContract) = abi.decode( _customConfigData, (string, string, uint8) ); // ERC20 Metadata nameOfContract = _nameOfContract; symbolOfContract = _symbolOfContract; decimalsOfContract = _decimalsOfContract; // Instantiate Interest _addInterest(); // Instantiate Exchange Rate _updateExchangeRate(); } } // ============================================================================================ // Internal Helpers // ============================================================================================ /// @notice The ```_totalAssetAvailable``` function returns the total balance of Asset Tokens in the contract /// @param _totalAsset VaultAccount struct which stores total amount and shares for assets /// @param _totalBorrow VaultAccount struct which stores total amount and shares for borrows /// @return The balance of Asset Tokens held by contract function _totalAssetAvailable( VaultAccount memory _totalAsset, VaultAccount memory _totalBorrow ) internal pure returns (uint256) { return _totalAsset.amount - _totalBorrow.amount; } /// @notice The ```_isSolvent``` function determines if a given borrower is solvent given an exchange rate /// @param _borrower The borrower address to check /// @param _exchangeRate The exchange rate, i.e. the amount of collateral to buy 1e18 asset /// @return Whether borrower is solvent function _isSolvent(address _borrower, uint256 _exchangeRate) internal view returns (bool) { if (maxLTV == 0) return true; uint256 _borrowerAmount = totalBorrow.toAmount(userBorrowShares[_borrower], true); if (_borrowerAmount == 0) return true; uint256 _collateralAmount = userCollateralBalance[_borrower]; if (_collateralAmount == 0) return false; uint256 _ltv = (((_borrowerAmount * _exchangeRate) / EXCHANGE_PRECISION) * LTV_PRECISION) / _collateralAmount; return _ltv <= maxLTV; } // ============================================================================================ // Modifiers // ============================================================================================ /// @notice Checks for solvency AFTER executing contract code /// @param _borrower The borrower whose solvency we will check modifier isSolvent(address _borrower) { _; ExchangeRateInfo memory _exchangeRateInfo = exchangeRateInfo; if (!_isSolvent(_borrower, exchangeRateInfo.highExchangeRate)) { revert Insolvent( totalBorrow.toAmount(userBorrowShares[_borrower], true), userCollateralBalance[_borrower], exchangeRateInfo.highExchangeRate ); } } // ============================================================================================ // Functions: Interest Accumulation and Adjustment // ============================================================================================ /// @notice The ```AddInterest``` event is emitted when interest is accrued by borrowers /// @param interestEarned The total interest accrued by all borrowers /// @param rate The interest rate used to calculate accrued interest /// @param feesAmount The amount of fees paid to protocol /// @param feesShare The amount of shares distributed to protocol event AddInterest(uint256 interestEarned, uint256 rate, uint256 feesAmount, uint256 feesShare); /// @notice The ```UpdateRate``` event is emitted when the interest rate is updated /// @param oldRatePerSec The old interest rate (per second) /// @param oldFullUtilizationRate The old full utilization rate /// @param newRatePerSec The new interest rate (per second) /// @param newFullUtilizationRate The new full utilization rate event UpdateRate( uint256 oldRatePerSec, uint256 oldFullUtilizationRate, uint256 newRatePerSec, uint256 newFullUtilizationRate ); /// @notice The ```addInterest``` function is a public implementation of _addInterest and allows 3rd parties to trigger interest accrual /// @return _interestEarned The amount of interest accrued by all borrowers /// @return _feesAmount The amount of fees paid to protocol /// @return _feesShare The amount of shares distributed to protocol /// @return _currentRateInfo The new rate info struct /// @return _totalAsset The new total asset struct /// @return _totalBorrow The new total borrow struct function addInterest( bool _returnAccounting ) external nonReentrant returns ( uint256 _interestEarned, uint256 _feesAmount, uint256 _feesShare, CurrentRateInfo memory _currentRateInfo, VaultAccount memory _totalAsset, VaultAccount memory _totalBorrow ) { (, _interestEarned, _feesAmount, _feesShare, _currentRateInfo) = _addInterest(); if (_returnAccounting) { _totalAsset = totalAsset; _totalBorrow = totalBorrow; } } /// @notice The ```previewAddInterest``` function /// @return _interestEarned The amount of interest accrued by all borrowers /// @return _feesAmount The amount of fees paid to protocol /// @return _feesShare The amount of shares distributed to protocol /// @return _newCurrentRateInfo The new rate info struct /// @return _totalAsset The new total asset struct /// @return _totalBorrow The new total borrow struct function previewAddInterest() public view returns ( uint256 _interestEarned, uint256 _feesAmount, uint256 _feesShare, CurrentRateInfo memory _newCurrentRateInfo, VaultAccount memory _totalAsset, VaultAccount memory _totalBorrow ) { _newCurrentRateInfo = currentRateInfo; // Write return values InterestCalculationResults memory _results = _calculateInterest(_newCurrentRateInfo); if (_results.isInterestUpdated) { _interestEarned = _results.interestEarned; _feesAmount = _results.feesAmount; _feesShare = _results.feesShare; _newCurrentRateInfo.ratePerSec = _results.newRate; _newCurrentRateInfo.fullUtilizationRate = _results.newFullUtilizationRate; _totalAsset = _results.totalAsset; _totalBorrow = _results.totalBorrow; } else { _totalAsset = totalAsset; _totalBorrow = totalBorrow; } } struct InterestCalculationResults { bool isInterestUpdated; uint64 newRate; uint64 newFullUtilizationRate; uint256 interestEarned; uint256 feesAmount; uint256 feesShare; VaultAccount totalAsset; VaultAccount totalBorrow; } /// @notice The ```_calculateInterest``` function calculates the interest to be accrued and the new interest rate info /// @param _currentRateInfo The current rate info /// @return _results The results of the interest calculation function _calculateInterest( CurrentRateInfo memory _currentRateInfo ) internal view returns (InterestCalculationResults memory _results) { // Short circuit if interest already calculated this block OR if interest is paused if (_currentRateInfo.lastTimestamp != block.timestamp && !isInterestPaused) { // Indicate that interest is updated and calculated _results.isInterestUpdated = true; // Write return values and use these to save gas _results.totalAsset = totalAsset; _results.totalBorrow = totalBorrow; // Time elapsed since last interest update uint256 _deltaTime = block.timestamp - _currentRateInfo.lastTimestamp; // Get the utilization rate uint256 _utilizationRate = _results.totalAsset.amount == 0 ? 0 : (UTIL_PREC * _results.totalBorrow.amount) / _results.totalAsset.amount; // Request new interest rate and full utilization rate from the rate calculator (_results.newRate, _results.newFullUtilizationRate) = IRateCalculatorV2(rateContract).getNewRate( _deltaTime, _utilizationRate, _currentRateInfo.fullUtilizationRate ); // Calculate interest accrued _results.interestEarned = (_deltaTime * _results.totalBorrow.amount * _results.newRate) / RATE_PRECISION; // Accrue interest (if any) and fees iff no overflow if ( _results.interestEarned > 0 && _results.interestEarned + _results.totalBorrow.amount <= type(uint128).max && _results.interestEarned + _results.totalAsset.amount <= type(uint128).max ) { // Increment totalBorrow and totalAsset by interestEarned _results.totalBorrow.amount += uint128(_results.interestEarned); _results.totalAsset.amount += uint128(_results.interestEarned); if (_currentRateInfo.feeToProtocolRate > 0) { _results.feesAmount = (_results.interestEarned * _currentRateInfo.feeToProtocolRate) / FEE_PRECISION; _results.feesShare = (_results.feesAmount * _results.totalAsset.shares) / (_results.totalAsset.amount - _results.feesAmount); // Effects: Give new shares to this contract, effectively diluting lenders an amount equal to the fees // We can safely cast because _feesShare < _feesAmount < interestEarned which is always less than uint128 _results.totalAsset.shares += uint128(_results.feesShare); } } } } /// @notice The ```_addInterest``` function is invoked prior to every external function and is used to accrue interest and update interest rate /// @dev Can only called once per block /// @return _isInterestUpdated True if interest was calculated /// @return _interestEarned The amount of interest accrued by all borrowers /// @return _feesAmount The amount of fees paid to protocol /// @return _feesShare The amount of shares distributed to protocol /// @return _currentRateInfo The new rate info struct function _addInterest() internal returns ( bool _isInterestUpdated, uint256 _interestEarned, uint256 _feesAmount, uint256 _feesShare, CurrentRateInfo memory _currentRateInfo ) { // Pull from storage and set default return values _currentRateInfo = currentRateInfo; // Calc interest InterestCalculationResults memory _results = _calculateInterest(_currentRateInfo); // Write return values only if interest was updated and calculated if (_results.isInterestUpdated) { _isInterestUpdated = _results.isInterestUpdated; _interestEarned = _results.interestEarned; _feesAmount = _results.feesAmount; _feesShare = _results.feesShare; // emit here so that we have access to the old values emit UpdateRate( _currentRateInfo.ratePerSec, _currentRateInfo.fullUtilizationRate, _results.newRate, _results.newFullUtilizationRate ); emit AddInterest(_interestEarned, _results.newRate, _feesAmount, _feesShare); // overwrite original values _currentRateInfo.ratePerSec = _results.newRate; _currentRateInfo.fullUtilizationRate = _results.newFullUtilizationRate; _currentRateInfo.lastTimestamp = uint64(block.timestamp); _currentRateInfo.lastBlock = uint32(block.number); // Effects: write to state currentRateInfo = _currentRateInfo; totalAsset = _results.totalAsset; totalBorrow = _results.totalBorrow; if (_feesShare > 0) _mint(address(this), _feesShare); } } // ============================================================================================ // Functions: ExchangeRate // ============================================================================================ /// @notice The ```UpdateExchangeRate``` event is emitted when the Collateral:Asset exchange rate is updated /// @param lowExchangeRate The low exchange rate /// @param highExchangeRate The high exchange rate event UpdateExchangeRate(uint256 lowExchangeRate, uint256 highExchangeRate); /// @notice The ```WarnOracleData``` event is emitted when one of the oracles has stale or otherwise problematic data /// @param oracle The oracle address event WarnOracleData(address oracle); /// @notice The ```updateExchangeRate``` function is the external implementation of _updateExchangeRate. /// @dev This function is invoked at most once per block as these queries can be expensive /// @return _isBorrowAllowed True if deviation is within bounds /// @return _lowExchangeRate The low exchange rate /// @return _highExchangeRate The high exchange rate function updateExchangeRate() external nonReentrant returns (bool _isBorrowAllowed, uint256 _lowExchangeRate, uint256 _highExchangeRate) { return _updateExchangeRate(); } /// @notice The ```_updateExchangeRate``` function retrieves the latest exchange rate. i.e how much collateral to buy 1e18 asset. /// @dev This function is invoked at most once per block as these queries can be expensive /// @return _isBorrowAllowed True if deviation is within bounds /// @return _lowExchangeRate The low exchange rate /// @return _highExchangeRate The high exchange rate function _updateExchangeRate() internal returns (bool _isBorrowAllowed, uint256 _lowExchangeRate, uint256 _highExchangeRate) { // Pull from storage to save gas and set default return values ExchangeRateInfo memory _exchangeRateInfo = exchangeRateInfo; // Short circuit if already updated this block if (_exchangeRateInfo.lastTimestamp != block.timestamp) { // Get the latest exchange rate from the dual oracle bool _oneOracleBad; (_oneOracleBad, _lowExchangeRate, _highExchangeRate) = IDualOracle(_exchangeRateInfo.oracle).getPrices(); // If one oracle is bad data, emit an event for off-chain monitoring if (_oneOracleBad) emit WarnOracleData(_exchangeRateInfo.oracle); // Effects: Bookkeeping and write to storage _exchangeRateInfo.lastTimestamp = uint184(block.timestamp); _exchangeRateInfo.lowExchangeRate = _lowExchangeRate; _exchangeRateInfo.highExchangeRate = _highExchangeRate; exchangeRateInfo = _exchangeRateInfo; emit UpdateExchangeRate(_lowExchangeRate, _highExchangeRate); } else { // Use default return values if already updated this block _lowExchangeRate = _exchangeRateInfo.lowExchangeRate; _highExchangeRate = _exchangeRateInfo.highExchangeRate; } uint256 _deviation = (DEVIATION_PRECISION * (_exchangeRateInfo.highExchangeRate - _exchangeRateInfo.lowExchangeRate)) / _exchangeRateInfo.highExchangeRate; if (_deviation <= _exchangeRateInfo.maxOracleDeviation) { _isBorrowAllowed = true; } } // ============================================================================================ // Functions: Lending // ============================================================================================ /// @notice The ```Deposit``` event fires when a user deposits assets to the pair /// @param caller the msg.sender /// @param owner the account the fTokens are sent to /// @param assets the amount of assets deposited /// @param shares the number of fTokens minted event Deposit(address indexed caller, address indexed owner, uint256 assets, uint256 shares); /// @notice The ```_deposit``` function is the internal implementation for lending assets /// @dev Caller must invoke ```ERC20.approve``` on the Asset Token contract prior to calling function /// @param _totalAsset An in memory VaultAccount struct representing the total amounts and shares for the Asset Token /// @param _amount The amount of Asset Token to be transferred /// @param _shares The amount of Asset Shares (fTokens) to be minted /// @param _receiver The address to receive the Asset Shares (fTokens) function _deposit(VaultAccount memory _totalAsset, uint128 _amount, uint128 _shares, address _receiver) internal { // Effects: bookkeeping _totalAsset.amount += _amount; _totalAsset.shares += _shares; // Effects: write back to storage _mint(_receiver, _shares); totalAsset = _totalAsset; // Interactions assetContract.safeTransferFrom(msg.sender, address(this), _amount); emit Deposit(msg.sender, _receiver, _amount, _shares); } function previewDeposit(uint256 _assets) external view returns (uint256 _sharesReceived) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); _sharesReceived = _totalAsset.toShares(_assets, false); } /// @notice The ```deposit``` function allows a user to Lend Assets by specifying the amount of Asset Tokens to lend /// @dev Caller must invoke ```ERC20.approve``` on the Asset Token contract prior to calling function /// @param _amount The amount of Asset Token to transfer to Pair /// @param _receiver The address to receive the Asset Shares (fTokens) /// @return _sharesReceived The number of fTokens received for the deposit function deposit(uint256 _amount, address _receiver) external nonReentrant returns (uint256 _sharesReceived) { if (_receiver == address(0)) revert InvalidReceiver(); // Accrue interest if necessary _addInterest(); // Pull from storage to save gas VaultAccount memory _totalAsset = totalAsset; // Check if this deposit will violate the deposit limit if (depositLimit < _totalAsset.amount + _amount) revert ExceedsDepositLimit(); // Calculate the number of fTokens to mint _sharesReceived = _totalAsset.toShares(_amount, false); // Execute the deposit effects _deposit(_totalAsset, _amount.toUint128(), _sharesReceived.toUint128(), _receiver); } function previewMint(uint256 _shares) external view returns (uint256 _amount) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); _amount = _totalAsset.toAmount(_shares, false); } function mint(uint256 _shares, address _receiver) external nonReentrant returns (uint256 _amount) { if (_receiver == address(0)) revert InvalidReceiver(); // Accrue interest if necessary _addInterest(); // Pull from storage to save gas VaultAccount memory _totalAsset = totalAsset; // Calculate the number of assets to transfer based on the shares to mint _amount = _totalAsset.toAmount(_shares, false); // Check if this deposit will violate the deposit limit if (depositLimit < _totalAsset.amount + _amount) revert ExceedsDepositLimit(); // Execute the deposit effects _deposit(_totalAsset, _amount.toUint128(), _shares.toUint128(), _receiver); } /// @notice The ```Withdraw``` event fires when a user redeems their fTokens for the underlying asset /// @param caller the msg.sender /// @param receiver The address to which the underlying asset will be transferred to /// @param owner The owner of the fTokens /// @param assets The assets transferred /// @param shares The number of fTokens burned event Withdraw( address indexed caller, address indexed receiver, address indexed owner, uint256 assets, uint256 shares ); /// @notice The ```_redeem``` function is an internal implementation which allows a Lender to pull their Asset Tokens out of the Pair /// @dev Caller must invoke ```ERC20.approve``` on the Asset Token contract prior to calling function /// @param _totalAsset An in-memory VaultAccount struct which holds the total amount of Asset Tokens and the total number of Asset Shares (fTokens) /// @param _amountToReturn The number of Asset Tokens to return /// @param _shares The number of Asset Shares (fTokens) to burn /// @param _receiver The address to which the Asset Tokens will be transferred /// @param _owner The owner of the Asset Shares (fTokens) function _redeem( VaultAccount memory _totalAsset, uint128 _amountToReturn, uint128 _shares, address _receiver, address _owner ) internal { // Check for sufficient allowance/approval if necessary if (msg.sender != _owner) { uint256 allowed = allowance(_owner, msg.sender); // NOTE: This will revert on underflow ensuring that allowance > shares if (allowed != type(uint256).max) _approve(_owner, msg.sender, allowed - _shares); } // Check for sufficient withdraw liquidity (not strictly necessary because balance will underflow) uint256 _assetsAvailable = _totalAssetAvailable(_totalAsset, totalBorrow); if (_assetsAvailable < _amountToReturn) { revert InsufficientAssetsInContract(_assetsAvailable, _amountToReturn); } // Effects: bookkeeping _totalAsset.amount -= _amountToReturn; _totalAsset.shares -= _shares; // Effects: write to storage totalAsset = _totalAsset; _burn(_owner, _shares); // Interactions assetContract.safeTransfer(_receiver, _amountToReturn); emit Withdraw(msg.sender, _receiver, _owner, _amountToReturn, _shares); } function previewRedeem(uint256 _shares) external view returns (uint256 _assets) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); _assets = _totalAsset.toAmount(_shares, false); } /// @notice The ```redeem``` function allows the caller to redeem their Asset Shares for Asset Tokens /// @param _shares The number of Asset Shares (fTokens) to burn for Asset Tokens /// @param _receiver The address to which the Asset Tokens will be transferred /// @param _owner The owner of the Asset Shares (fTokens) /// @return _amountToReturn The amount of Asset Tokens to be transferred function redeem( uint256 _shares, address _receiver, address _owner ) external nonReentrant returns (uint256 _amountToReturn) { if (_receiver == address(0)) revert InvalidReceiver(); // Check if withdraw is paused and revert if necessary if (isWithdrawPaused) revert WithdrawPaused(); // Accrue interest if necessary _addInterest(); // Pull from storage to save gas VaultAccount memory _totalAsset = totalAsset; // Calculate the number of assets to transfer based on the shares to burn _amountToReturn = _totalAsset.toAmount(_shares, false); // Execute the withdraw effects _redeem(_totalAsset, _amountToReturn.toUint128(), _shares.toUint128(), _receiver, _owner); } /// @notice The ```previewWithdraw``` function returns the number of Asset Shares (fTokens) that would be burned for a given amount of Asset Tokens /// @param _amount The amount of Asset Tokens to be withdrawn /// @return _sharesToBurn The number of shares that would be burned function previewWithdraw(uint256 _amount) external view returns (uint256 _sharesToBurn) { (, , , , VaultAccount memory _totalAsset, ) = previewAddInterest(); _sharesToBurn = _totalAsset.toShares(_amount, true); } /// @notice The ```withdraw``` function allows the caller to withdraw their Asset Tokens for a given amount of fTokens /// @param _amount The amount to withdraw /// @param _receiver The address to which the Asset Tokens will be transferred /// @param _owner The owner of the Asset Shares (fTokens) /// @return _sharesToBurn The number of shares (fTokens) that were burned function withdraw( uint256 _amount, address _receiver, address _owner ) external nonReentrant returns (uint256 _sharesToBurn) { if (_receiver == address(0)) revert InvalidReceiver(); // Check if withdraw is paused and revert if necessary if (isWithdrawPaused) revert WithdrawPaused(); // Accrue interest if necessary _addInterest(); // Pull from storage to save gas VaultAccount memory _totalAsset = totalAsset; // Calculate the number of shares to burn based on the amount to withdraw _sharesToBurn = _totalAsset.toShares(_amount, true); // Execute the withdraw effects _redeem(_totalAsset, _amount.toUint128(), _sharesToBurn.toUint128(), _receiver, _owner); } // ============================================================================================ // Functions: Borrowing // ============================================================================================ /// @notice The ```BorrowAsset``` event is emitted when a borrower increases their position /// @param _borrower The borrower whose account was debited /// @param _receiver The address to which the Asset Tokens were transferred /// @param _borrowAmount The amount of Asset Tokens transferred /// @param _sharesAdded The number of Borrow Shares the borrower was debited event BorrowAsset( address indexed _borrower, address indexed _receiver, uint256 _borrowAmount, uint256 _sharesAdded ); /// @notice The ```_borrowAsset``` function is the internal implementation for borrowing assets /// @param _borrowAmount The amount of the Asset Token to borrow /// @param _receiver The address to receive the Asset Tokens /// @return _sharesAdded The amount of borrow shares the msg.sender will be debited function _borrowAsset(uint128 _borrowAmount, address _receiver) internal returns (uint256 _sharesAdded) { // Get borrow accounting from storage to save gas VaultAccount memory _totalBorrow = totalBorrow; // Check available capital (not strictly necessary because balance will underflow, but better revert message) uint256 _assetsAvailable = _totalAssetAvailable(totalAsset, _totalBorrow); if (_assetsAvailable < _borrowAmount) { revert InsufficientAssetsInContract(_assetsAvailable, _borrowAmount); } // Calculate the number of shares to add based on the amount to borrow _sharesAdded = _totalBorrow.toShares(_borrowAmount, true); // Effects: Bookkeeping to add shares & amounts to total Borrow accounting _totalBorrow.amount += _borrowAmount; _totalBorrow.shares += uint128(_sharesAdded); // NOTE: we can safely cast here because shares are always less than amount and _borrowAmount is uint128 // Effects: write back to storage totalBorrow = _totalBorrow; userBorrowShares[msg.sender] += _sharesAdded; // Interactions if (_receiver != address(this)) { assetContract.safeTransfer(_receiver, _borrowAmount); } emit BorrowAsset(msg.sender, _receiver, _borrowAmount, _sharesAdded); } /// @notice The ```borrowAsset``` function allows a user to open/increase a borrow position /// @dev Borrower must call ```ERC20.approve``` on the Collateral Token contract if applicable /// @param _borrowAmount The amount of Asset Token to borrow /// @param _collateralAmount The amount of Collateral Token to transfer to Pair /// @param _receiver The address which will receive the Asset Tokens /// @return _shares The number of borrow Shares the msg.sender will be debited function borrowAsset( uint256 _borrowAmount, uint256 _collateralAmount, address _receiver ) external nonReentrant isSolvent(msg.sender) returns (uint256 _shares) { if (_receiver == address(0)) revert InvalidReceiver(); // Accrue interest if necessary _addInterest(); // Check if borrow will violate the borrow limit and revert if necessary if (borrowLimit < totalBorrow.amount + _borrowAmount) revert ExceedsBorrowLimit(); // Update _exchangeRate and check if borrow is allowed based on deviation (bool _isBorrowAllowed, , ) = _updateExchangeRate(); if (!_isBorrowAllowed) revert ExceedsMaxOracleDeviation(); // Only add collateral if necessary if (_collateralAmount > 0) { _addCollateral(msg.sender, _collateralAmount, msg.sender); } // Effects: Call internal borrow function _shares = _borrowAsset(_borrowAmount.toUint128(), _receiver); } /// @notice The ```AddCollateral``` event is emitted when a borrower adds collateral to their position /// @param sender The source of funds for the new collateral /// @param borrower The borrower account for which the collateral should be credited /// @param collateralAmount The amount of Collateral Token to be transferred event AddCollateral(address indexed sender, address indexed borrower, uint256 collateralAmount); /// @notice The ```_addCollateral``` function is an internal implementation for adding collateral to a borrowers position /// @param _sender The source of funds for the new collateral /// @param _collateralAmount The amount of Collateral Token to be transferred /// @param _borrower The borrower account for which the collateral should be credited function _addCollateral(address _sender, uint256 _collateralAmount, address _borrower) internal { // Effects: write to state userCollateralBalance[_borrower] += _collateralAmount; totalCollateral += _collateralAmount; // Interactions if (_sender != address(this)) { collateralContract.safeTransferFrom(_sender, address(this), _collateralAmount); } emit AddCollateral(_sender, _borrower, _collateralAmount); } /// @notice The ```addCollateral``` function allows the caller to add Collateral Token to a borrowers position /// @dev msg.sender must call ERC20.approve() on the Collateral Token contract prior to invocation /// @param _collateralAmount The amount of Collateral Token to be added to borrower's position /// @param _borrower The account to be credited function addCollateral(uint256 _collateralAmount, address _borrower) external nonReentrant { if (_borrower == address(0)) revert InvalidReceiver(); _addInterest(); _addCollateral(msg.sender, _collateralAmount, _borrower); } /// @notice The ```RemoveCollateral``` event is emitted when collateral is removed from a borrower's position /// @param _sender The account from which funds are transferred /// @param _collateralAmount The amount of Collateral Token to be transferred /// @param _receiver The address to which Collateral Tokens will be transferred event RemoveCollateral( address indexed _sender, uint256 _collateralAmount, address indexed _receiver, address indexed _borrower ); /// @notice The ```_removeCollateral``` function is the internal implementation for removing collateral from a borrower's position /// @param _collateralAmount The amount of Collateral Token to remove from the borrower's position /// @param _receiver The address to receive the Collateral Token transferred /// @param _borrower The borrower whose account will be debited the Collateral amount function _removeCollateral(uint256 _collateralAmount, address _receiver, address _borrower) internal { // Effects: write to state // NOTE: Following line will revert on underflow if _collateralAmount > userCollateralBalance userCollateralBalance[_borrower] -= _collateralAmount; // NOTE: Following line will revert on underflow if totalCollateral < _collateralAmount totalCollateral -= _collateralAmount; // Interactions if (_receiver != address(this)) { collateralContract.safeTransfer(_receiver, _collateralAmount); } emit RemoveCollateral(msg.sender, _collateralAmount, _receiver, _borrower); } /// @notice The ```removeCollateral``` function is used to remove collateral from msg.sender's borrow position /// @dev msg.sender must be solvent after invocation or transaction will revert /// @param _collateralAmount The amount of Collateral Token to transfer /// @param _receiver The address to receive the transferred funds function removeCollateral( uint256 _collateralAmount, address _receiver ) external nonReentrant isSolvent(msg.sender) { if (_receiver == address(0)) revert InvalidReceiver(); _addInterest(); // Note: exchange rate is irrelevant when borrower has no debt shares if (userBorrowShares[msg.sender] > 0) { (bool _isBorrowAllowed, , ) = _updateExchangeRate(); if (!_isBorrowAllowed) revert ExceedsMaxOracleDeviation(); } _removeCollateral(_collateralAmount, _receiver, msg.sender); } /// @notice The ```RepayAsset``` event is emitted whenever a debt position is repaid /// @param payer The address paying for the repayment /// @param borrower The borrower whose account will be credited /// @param amountToRepay The amount of Asset token to be transferred /// @param shares The amount of Borrow Shares which will be debited from the borrower after repayment event RepayAsset(address indexed payer, address indexed borrower, uint256 amountToRepay, uint256 shares); /// @notice The ```_repayAsset``` function is the internal implementation for repaying a borrow position /// @dev The payer must have called ERC20.approve() on the Asset Token contract prior to invocation /// @param _totalBorrow An in memory copy of the totalBorrow VaultAccount struct /// @param _amountToRepay The amount of Asset Token to transfer /// @param _shares The number of Borrow Shares the sender is repaying /// @param _payer The address from which funds will be transferred /// @param _borrower The borrower account which will be credited function _repayAsset( VaultAccount memory _totalBorrow, uint128 _amountToRepay, uint128 _shares, address _payer, address _borrower ) internal { // Effects: Bookkeeping _totalBorrow.amount -= _amountToRepay; _totalBorrow.shares -= _shares; // Effects: write to state userBorrowShares[_borrower] -= _shares; totalBorrow = _totalBorrow; // Interactions if (_payer != address(this)) { assetContract.safeTransferFrom(_payer, address(this), _amountToRepay); } emit RepayAsset(_payer, _borrower, _amountToRepay, _shares); } /// @notice The ```repayAsset``` function allows the caller to pay down the debt for a given borrower. /// @dev Caller must first invoke ```ERC20.approve()``` for the Asset Token contract /// @param _shares The number of Borrow Shares which will be repaid by the call /// @param _borrower The account for which the debt will be reduced /// @return _amountToRepay The amount of Asset Tokens which were transferred in order to repay the Borrow Shares function repayAsset(uint256 _shares, address _borrower) external nonReentrant returns (uint256 _amountToRepay) { if (_borrower == address(0)) revert InvalidReceiver(); // Check if repay is paused revert if necessary if (isRepayPaused) revert RepayPaused(); // Accrue interest if necessary _addInterest(); // Calculate amount to repay based on shares VaultAccount memory _totalBorrow = totalBorrow; _amountToRepay = _totalBorrow.toAmount(_shares, true); // Execute repayment effects _repayAsset(_totalBorrow, _amountToRepay.toUint128(), _shares.toUint128(), msg.sender, _borrower); } // ============================================================================================ // Functions: Liquidations // ============================================================================================ /// @notice The ```Liquidate``` event is emitted when a liquidation occurs /// @param _borrower The borrower account for which the liquidation occurred /// @param _collateralForLiquidator The amount of Collateral Token transferred to the liquidator /// @param _sharesToLiquidate The number of Borrow Shares the liquidator repaid on behalf of the borrower /// @param _sharesToAdjust The number of Borrow Shares that were adjusted on liabilities and assets (a writeoff) event Liquidate( address indexed _borrower, uint256 _collateralForLiquidator, uint256 _sharesToLiquidate, uint256 _amountLiquidatorToRepay, uint256 _feesAmount, uint256 _sharesToAdjust, uint256 _amountToAdjust ); /// @notice The ```liquidate``` function allows a third party to repay a borrower's debt if they have become insolvent /// @dev Caller must invoke ```ERC20.approve``` on the Asset Token contract prior to calling ```Liquidate()``` /// @param _sharesToLiquidate The number of Borrow Shares repaid by the liquidator /// @param _deadline The timestamp after which tx will revert /// @param _borrower The account for which the repayment is credited and from whom collateral will be taken /// @return _collateralForLiquidator The amount of Collateral Token transferred to the liquidator function liquidate( uint128 _sharesToLiquidate, uint256 _deadline, address _borrower ) external nonReentrant returns (uint256 _collateralForLiquidator) { if (_borrower == address(0)) revert InvalidReceiver(); // Check if liquidate is paused revert if necessary if (isLiquidatePaused) revert LiquidatePaused(); // Ensure deadline has not passed if (block.timestamp > _deadline) revert PastDeadline(block.timestamp, _deadline); // accrue interest if necessary _addInterest(); // Update exchange rate and use the lower rate for liquidations (, uint256 _exchangeRate, ) = _updateExchangeRate(); // Check if borrower is solvent, revert if they are if (_isSolvent(_borrower, _exchangeRate)) { revert BorrowerSolvent(); } // Read from state VaultAccount memory _totalBorrow = totalBorrow; uint256 _userCollateralBalance = userCollateralBalance[_borrower]; uint128 _borrowerShares = userBorrowShares[_borrower].toUint128(); // Prevent stack-too-deep int256 _leftoverCollateral; uint256 _feesAmount; { // Checks & Calculations // Determine the liquidation amount in collateral units (i.e. how much debt liquidator is going to repay) uint256 _liquidationAmountInCollateralUnits = ((_totalBorrow.toAmount(_sharesToLiquidate, false) * _exchangeRate) / EXCHANGE_PRECISION); // We first optimistically calculate the amount of collateral to give the liquidator based on the higher clean liquidation fee // This fee only applies if the liquidator does a full liquidation uint256 _optimisticCollateralForLiquidator = (_liquidationAmountInCollateralUnits * (LIQ_PRECISION + cleanLiquidationFee)) / LIQ_PRECISION; // Because interest accrues every block, _liquidationAmountInCollateralUnits from a few lines up is an ever increasing value // This means that leftoverCollateral can occasionally go negative by a few hundred wei (cleanLiqFee premium covers this for liquidator) _leftoverCollateral = (_userCollateralBalance.toInt256() - _optimisticCollateralForLiquidator.toInt256()); // If cleanLiquidation fee results in no leftover collateral, give liquidator all the collateral // This will only be true when there liquidator is cleaning out the position _collateralForLiquidator = _leftoverCollateral <= 0 ? _userCollateralBalance : (_liquidationAmountInCollateralUnits * (LIQ_PRECISION + dirtyLiquidationFee)) / LIQ_PRECISION; if (protocolLiquidationFee > 0) { _feesAmount = (protocolLiquidationFee * _collateralForLiquidator) / LIQ_PRECISION; _collateralForLiquidator = _collateralForLiquidator - _feesAmount; } } // Calculated here for use during repayment, grouped with other calcs before effects start uint128 _amountLiquidatorToRepay = (_totalBorrow.toAmount(_sharesToLiquidate, true)).toUint128(); // Determine if and how much debt to adjust uint128 _sharesToAdjust = 0; { uint128 _amountToAdjust = 0; if (_leftoverCollateral <= 0) { // Determine if we need to adjust any shares _sharesToAdjust = _borrowerShares - _sharesToLiquidate; if (_sharesToAdjust > 0) { // Write off bad debt _amountToAdjust = (_totalBorrow.toAmount(_sharesToAdjust, false)).toUint128(); // Note: Ensure this memory struct will be passed to _repayAsset for write to state _totalBorrow.amount -= _amountToAdjust; // Effects: write to state totalAsset.amount -= _amountToAdjust; } } emit Liquidate( _borrower, _collateralForLiquidator, _sharesToLiquidate, _amountLiquidatorToRepay, _feesAmount, _sharesToAdjust, _amountToAdjust ); } // Effects & Interactions // NOTE: reverts if _shares > userBorrowShares _repayAsset( _totalBorrow, _amountLiquidatorToRepay, _sharesToLiquidate + _sharesToAdjust, msg.sender, _borrower ); // liquidator repays shares on behalf of borrower // NOTE: reverts if _collateralForLiquidator > userCollateralBalance // Collateral is removed on behalf of borrower and sent to liquidator // NOTE: reverts if _collateralForLiquidator > userCollateralBalance _removeCollateral(_collateralForLiquidator, msg.sender, _borrower); // Adjust bookkeeping only (decreases collateral held by borrower) _removeCollateral(_feesAmount, address(this), _borrower); // Adjusts bookkeeping only (increases collateral held by protocol) _addCollateral(address(this), _feesAmount, address(this)); } // ============================================================================================ // Functions: Leverage // ============================================================================================ /// @notice The ```LeveragedPosition``` event is emitted when a borrower takes out a new leveraged position /// @param _borrower The account for which the debt is debited /// @param _swapperAddress The address of the swapper which conforms the FraxSwap interface /// @param _borrowAmount The amount of Asset Token to be borrowed to be borrowed /// @param _borrowShares The number of Borrow Shares the borrower is credited /// @param _initialCollateralAmount The amount of initial Collateral Tokens supplied by the borrower /// @param _amountCollateralOut The amount of Collateral Token which was received for the Asset Tokens event LeveragedPosition( address indexed _borrower, address _swapperAddress, uint256 _borrowAmount, uint256 _borrowShares, uint256 _initialCollateralAmount, uint256 _amountCollateralOut ); /// @notice The ```leveragedPosition``` function allows a user to enter a leveraged borrow position with minimal upfront Collateral /// @dev Caller must invoke ```ERC20.approve()``` on the Collateral Token contract prior to calling function /// @param _swapperAddress The address of the whitelisted swapper to use to swap borrowed Asset Tokens for Collateral Tokens /// @param _borrowAmount The amount of Asset Tokens borrowed /// @param _initialCollateralAmount The initial amount of Collateral Tokens supplied by the borrower /// @param _amountCollateralOutMin The minimum amount of Collateral Tokens to be received in exchange for the borrowed Asset Tokens /// @param _path An array containing the addresses of ERC20 tokens to swap. Adheres to UniV2 style path params. /// @return _totalCollateralBalance The total amount of Collateral Tokens added to a users account (initial + swap) function leveragedPosition( address _swapperAddress, uint256 _borrowAmount, uint256 _initialCollateralAmount, uint256 _amountCollateralOutMin, address[] memory _path ) external nonReentrant isSolvent(msg.sender) returns (uint256 _totalCollateralBalance) { // Accrue interest if necessary _addInterest(); // Update exchange rate and check if borrow is allowed, revert if not { (bool _isBorrowAllowed, , ) = _updateExchangeRate(); if (!_isBorrowAllowed) revert ExceedsMaxOracleDeviation(); } IERC20 _assetContract = assetContract; IERC20 _collateralContract = collateralContract; if (!swappers[_swapperAddress]) { revert BadSwapper(); } if (_path[0] != address(_assetContract)) { revert InvalidPath(address(_assetContract), _path[0]); } if (_path[_path.length - 1] != address(_collateralContract)) { revert InvalidPath(address(_collateralContract), _path[_path.length - 1]); } // Add initial collateral if (_initialCollateralAmount > 0) { _addCollateral(msg.sender, _initialCollateralAmount, msg.sender); } // Debit borrowers account // setting recipient to address(this) means no transfer will happen uint256 _borrowShares = _borrowAsset(_borrowAmount.toUint128(), address(this)); // Interactions _assetContract.approve(_swapperAddress, _borrowAmount); // Even though swappers are trusted, we verify the balance before and after swap uint256 _initialCollateralBalance = _collateralContract.balanceOf(address(this)); ISwapper(_swapperAddress).swapExactTokensForTokens( _borrowAmount, _amountCollateralOutMin, _path, address(this), block.timestamp ); uint256 _finalCollateralBalance = _collateralContract.balanceOf(address(this)); // Note: VIOLATES CHECKS-EFFECTS-INTERACTION pattern, make sure function is NONREENTRANT // Effects: bookkeeping & write to state uint256 _amountCollateralOut = _finalCollateralBalance - _initialCollateralBalance; if (_amountCollateralOut < _amountCollateralOutMin) { revert SlippageTooHigh(_amountCollateralOutMin, _amountCollateralOut); } // address(this) as _sender means no transfer occurs as the pair has already received the collateral during swap _addCollateral(address(this), _amountCollateralOut, msg.sender); _totalCollateralBalance = _initialCollateralAmount + _amountCollateralOut; emit LeveragedPosition( msg.sender, _swapperAddress, _borrowAmount, _borrowShares, _initialCollateralAmount, _amountCollateralOut ); } /// @notice The ```RepayAssetWithCollateral``` event is emitted whenever ```repayAssetWithCollateral()``` is invoked /// @param _borrower The borrower account for which the repayment is taking place /// @param _swapperAddress The address of the whitelisted swapper to use for token swaps /// @param _collateralToSwap The amount of Collateral Token to swap and use for repayment /// @param _amountAssetOut The amount of Asset Token which was repaid /// @param _sharesRepaid The number of Borrow Shares which were repaid event RepayAssetWithCollateral( address indexed _borrower, address _swapperAddress, uint256 _collateralToSwap, uint256 _amountAssetOut, uint256 _sharesRepaid ); /// @notice The ```repayAssetWithCollateral``` function allows a borrower to repay their debt using existing collateral in contract /// @param _swapperAddress The address of the whitelisted swapper to use for token swaps /// @param _collateralToSwap The amount of Collateral Tokens to swap for Asset Tokens /// @param _amountAssetOutMin The minimum amount of Asset Tokens to receive during the swap /// @param _path An array containing the addresses of ERC20 tokens to swap. Adheres to UniV2 style path params. /// @return _amountAssetOut The amount of Asset Tokens received for the Collateral Tokens, the amount the borrowers account was credited function repayAssetWithCollateral( address _swapperAddress, uint256 _collateralToSwap, uint256 _amountAssetOutMin, address[] calldata _path ) external nonReentrant isSolvent(msg.sender) returns (uint256 _amountAssetOut) { // Accrue interest if necessary _addInterest(); // Update exchange rate and check if borrow is allowed, revert if not (bool _isBorrowAllowed, , ) = _updateExchangeRate(); if (!_isBorrowAllowed) revert ExceedsMaxOracleDeviation(); IERC20 _assetContract = assetContract; IERC20 _collateralContract = collateralContract; if (!swappers[_swapperAddress]) { revert BadSwapper(); } if (_path[0] != address(_collateralContract)) { revert InvalidPath(address(_collateralContract), _path[0]); } if (_path[_path.length - 1] != address(_assetContract)) { revert InvalidPath(address(_assetContract), _path[_path.length - 1]); } // Effects: bookkeeping & write to state // Debit users collateral balance in preparation for swap, setting _recipient to address(this) means no transfer occurs _removeCollateral(_collateralToSwap, address(this), msg.sender); // Interactions _collateralContract.approve(_swapperAddress, _collateralToSwap); // Even though swappers are trusted, we verify the balance before and after swap uint256 _initialAssetBalance = _assetContract.balanceOf(address(this)); ISwapper(_swapperAddress).swapExactTokensForTokens( _collateralToSwap, _amountAssetOutMin, _path, address(this), block.timestamp ); uint256 _finalAssetBalance = _assetContract.balanceOf(address(this)); // Note: VIOLATES CHECKS-EFFECTS-INTERACTION pattern, make sure function is NONREENTRANT // Effects: bookkeeping _amountAssetOut = _finalAssetBalance - _initialAssetBalance; if (_amountAssetOut < _amountAssetOutMin) { revert SlippageTooHigh(_amountAssetOutMin, _amountAssetOut); } VaultAccount memory _totalBorrow = totalBorrow; uint256 _sharesToRepay = _totalBorrow.toShares(_amountAssetOut, false); // Effects: write to state // Note: setting _payer to address(this) means no actual transfer will occur. Contract already has funds _repayAsset(_totalBorrow, _amountAssetOut.toUint128(), _sharesToRepay.toUint128(), address(this), msg.sender); emit RepayAssetWithCollateral(msg.sender, _swapperAddress, _collateralToSwap, _amountAssetOut, _sharesToRepay); } }
// SPDX-License-Identifier: ISC pragma solidity >=0.8.18; interface IDualOracle { function getPrices() external view returns (bool _isBadData, uint256 _priceLow, uint256 _priceHigh); function decimals() external view returns (uint8); function oracleType() external view returns (uint256); function name() external view returns (string memory); }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; interface IRateCalculatorV2 { function name() external view returns (string memory); function version() external view returns (uint256, uint256, uint256); function getNewRate( uint256 _deltaTime, uint256 _utilization, uint64 _maxInterest ) external view returns (uint64 _newRatePerSec, uint64 _newMaxInterest); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.18; interface ISwapper { function swapExactTokensForTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; import "@openzeppelin/contracts/interfaces/IERC20.sol"; import { SafeERC20 as OZSafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; // solhint-disable avoid-low-level-calls // solhint-disable max-line-length /// @title SafeERC20 provides helper functions for safe transfers as well as safe metadata access /// @author Library originally written by @Boring_Crypto github.com/boring_crypto, modified by Drake Evans (Frax Finance) github.com/drakeevans /// @dev original: https://github.com/boringcrypto/BoringSolidity/blob/fed25c5d43cb7ce20764cd0b838e21a02ea162e9/contracts/libraries/BoringERC20.sol library SafeERC20 { bytes4 private constant SIG_SYMBOL = 0x95d89b41; // symbol() bytes4 private constant SIG_NAME = 0x06fdde03; // name() bytes4 private constant SIG_DECIMALS = 0x313ce567; // decimals() function returnDataToString(bytes memory data) internal pure returns (string memory) { if (data.length >= 64) { return abi.decode(data, (string)); } else if (data.length == 32) { uint8 i = 0; while (i < 32 && data[i] != 0) { i++; } bytes memory bytesArray = new bytes(i); for (i = 0; i < 32 && data[i] != 0; i++) { bytesArray[i] = data[i]; } return string(bytesArray); } else { return "???"; } } /// @notice Provides a safe ERC20.symbol version which returns '???' as fallback string. /// @param token The address of the ERC-20 token contract. /// @return (string) Token symbol. function safeSymbol(IERC20 token) internal view returns (string memory) { (bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_SYMBOL)); return success ? returnDataToString(data) : "???"; } /// @notice Provides a safe ERC20.name version which returns '???' as fallback string. /// @param token The address of the ERC-20 token contract. /// @return (string) Token name. function safeName(IERC20 token) internal view returns (string memory) { (bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_NAME)); return success ? returnDataToString(data) : "???"; } /// @notice Provides a safe ERC20.decimals version which returns '18' as fallback value. /// @param token The address of the ERC-20 token contract. /// @return (uint8) Token decimals. function safeDecimals(IERC20 token) internal view returns (uint8) { (bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_DECIMALS)); return success && data.length == 32 ? abi.decode(data, (uint8)) : 18; } function safeTransfer(IERC20 token, address to, uint256 value) internal { OZSafeERC20.safeTransfer(token, to, value); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { OZSafeERC20.safeTransferFrom(token, from, to, value); } }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; struct VaultAccount { uint128 amount; // Total amount, analogous to market cap uint128 shares; // Total shares, analogous to shares outstanding } /// @title VaultAccount Library /// @author Drake Evans (Frax Finance) github.com/drakeevans, modified from work by @Boring_Crypto github.com/boring_crypto /// @notice Provides a library for use with the VaultAccount struct, provides convenient math implementations /// @dev Uses uint128 to save on storage library VaultAccountingLibrary { /// @notice Calculates the shares value in relationship to `amount` and `total` /// @dev Given an amount, return the appropriate number of shares function toShares(VaultAccount memory total, uint256 amount, bool roundUp) internal pure returns (uint256 shares) { if (total.amount == 0) { shares = amount; } else { shares = (amount * total.shares) / total.amount; if (roundUp && (shares * total.amount) / total.shares < amount) { shares = shares + 1; } } } /// @notice Calculates the amount value in relationship to `shares` and `total` /// @dev Given a number of shares, returns the appropriate amount function toAmount(VaultAccount memory total, uint256 shares, bool roundUp) internal pure returns (uint256 amount) { if (total.shares == 0) { amount = shares; } else { amount = (shares * total.amount) / total.shares; if (roundUp && (amount * total.shares) / total.amount < shares) { amount = amount + 1; } } } }
// SPDX-License-Identifier: ISC pragma solidity ^0.8.18; // ==================================================================== // | ______ _______ | // | / _____________ __ __ / ____(_____ ____ _____ ________ | // | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ | // | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ | // | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ | // | | // ==================================================================== // ========================== Timelock2Step =========================== // ==================================================================== // Frax Finance: https://github.com/FraxFinance // Primary Author // Drake Evans: https://github.com/DrakeEvans // Reviewers // Dennis: https://github.com/denett // ==================================================================== /// @title Timelock2Step /// @author Drake Evans (Frax Finance) https://github.com/drakeevans /// @dev Inspired by the OpenZeppelin's Ownable2Step contract /// @notice An abstract contract which contains 2-step transfer and renounce logic for a timelock address abstract contract Timelock2Step { /// @notice The pending timelock address address public pendingTimelockAddress; /// @notice The current timelock address address public timelockAddress; constructor() { timelockAddress = msg.sender; } /// @notice Emitted when timelock is transferred error OnlyTimelock(); /// @notice Emitted when pending timelock is transferred error OnlyPendingTimelock(); /// @notice The ```TimelockTransferStarted``` event is emitted when the timelock transfer is initiated /// @param previousTimelock The address of the previous timelock /// @param newTimelock The address of the new timelock event TimelockTransferStarted(address indexed previousTimelock, address indexed newTimelock); /// @notice The ```TimelockTransferred``` event is emitted when the timelock transfer is completed /// @param previousTimelock The address of the previous timelock /// @param newTimelock The address of the new timelock event TimelockTransferred(address indexed previousTimelock, address indexed newTimelock); /// @notice The ```_isSenderTimelock``` function checks if msg.sender is current timelock address /// @return Whether or not msg.sender is current timelock address function _isSenderTimelock() internal view returns (bool) { return msg.sender == timelockAddress; } /// @notice The ```_requireTimelock``` function reverts if msg.sender is not current timelock address function _requireTimelock() internal view { if (msg.sender != timelockAddress) revert OnlyTimelock(); } /// @notice The ```_isSenderPendingTimelock``` function checks if msg.sender is pending timelock address /// @return Whether or not msg.sender is pending timelock address function _isSenderPendingTimelock() internal view returns (bool) { return msg.sender == pendingTimelockAddress; } /// @notice The ```_requirePendingTimelock``` function reverts if msg.sender is not pending timelock address function _requirePendingTimelock() internal view { if (msg.sender != pendingTimelockAddress) revert OnlyPendingTimelock(); } /// @notice The ```_transferTimelock``` function initiates the timelock transfer /// @dev This function is to be implemented by a public function /// @param _newTimelock The address of the nominated (pending) timelock function _transferTimelock(address _newTimelock) internal { pendingTimelockAddress = _newTimelock; emit TimelockTransferStarted(timelockAddress, _newTimelock); } /// @notice The ```_acceptTransferTimelock``` function completes the timelock transfer /// @dev This function is to be implemented by a public function function _acceptTransferTimelock() internal { pendingTimelockAddress = address(0); _setTimelock(msg.sender); } /// @notice The ```_setTimelock``` function sets the timelock address /// @dev This function is to be implemented by a public function /// @param _newTimelock The address of the new timelock function _setTimelock(address _newTimelock) internal { emit TimelockTransferred(timelockAddress, _newTimelock); timelockAddress = _newTimelock; } /// @notice The ```transferTimelock``` function initiates the timelock transfer /// @dev Must be called by the current timelock /// @param _newTimelock The address of the nominated (pending) timelock function transferTimelock(address _newTimelock) external virtual { _requireTimelock(); _transferTimelock(_newTimelock); } /// @notice The ```acceptTransferTimelock``` function completes the timelock transfer /// @dev Must be called by the pending timelock function acceptTransferTimelock() external virtual { _requirePendingTimelock(); _acceptTransferTimelock(); } /// @notice The ```renounceTimelock``` function renounces the timelock after setting pending timelock to current timelock /// @dev Pending timelock must be set to current timelock before renouncing, creating a 2-step renounce process function renounceTimelock() external virtual { _requireTimelock(); _requirePendingTimelock(); _transferTimelock(address(0)); _setTimelock(address(0)); } }
{ "metadata": { "bytecodeHash": "none" }, "viaIR": true, "optimizer": { "enabled": true, "runs": 1660 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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VaultAccount","name":"_totalBorrow","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_assets","type":"uint256"}],"name":"previewDeposit","outputs":[{"internalType":"uint256","name":"_sharesReceived","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"}],"name":"previewMint","outputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"}],"name":"previewRedeem","outputs":[{"internalType":"uint256","name":"_assets","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"previewWithdraw","outputs":[{"internalType":"uint256","name":"_sharesToBurn","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pricePerShare","outputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"protocolLiquidationFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rateContract","outputs":[{"internalType":"contract IRateCalculatorV2","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"},{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"redeem","outputs":[{"internalType":"uint256","name":"_amountToReturn","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_collateralAmount","type":"uint256"},{"internalType":"address","name":"_receiver","type":"address"}],"name":"removeCollateral","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceTimelock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"},{"internalType":"address","name":"_borrower","type":"address"}],"name":"repayAsset","outputs":[{"internalType":"uint256","name":"_amountToRepay","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_swapperAddress","type":"address"},{"internalType":"uint256","name":"_collateralToSwap","type":"uint256"},{"internalType":"uint256","name":"_amountAssetOutMin","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"repayAssetWithCollateral","outputs":[{"internalType":"uint256","name":"_amountAssetOut","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_borrowLimit","type":"uint256"}],"name":"revokeBorrowLimitAccessControl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositLimit","type":"uint256"}],"name":"revokeDepositLimitAccessControl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeInterestAccessControl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeLiquidateAccessControl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeLiquidationFeeSetter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeMaxLTVSetter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeOracleInfoSetter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeRateContractSetter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeRepayAccessControl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revokeWithdrawAccessControl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_limit","type":"uint256"}],"name":"setBorrowLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newCircuitBreaker","type":"address"}],"name":"setCircuitBreaker","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_limit","type":"uint256"}],"name":"setDepositLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newCleanLiquidationFee","type":"uint256"},{"internalType":"uint256","name":"_newDirtyLiquidationFee","type":"uint256"},{"internalType":"uint256","name":"_newProtocolLiquidationFee","type":"uint256"}],"name":"setLiquidationFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newMaxLTV","type":"uint256"}],"name":"setMaxLTV","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newOracle","type":"address"},{"internalType":"uint32","name":"_newMaxOracleDeviation","type":"uint32"}],"name":"setOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newRateContract","type":"address"}],"name":"setRateContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_swapper","type":"address"},{"internalType":"bool","name":"_approval","type":"bool"}],"name":"setSwapper","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"swappers","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"timelockAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"},{"internalType":"bool","name":"_roundUp","type":"bool"},{"internalType":"bool","name":"_previewInterest","type":"bool"}],"name":"toAssetAmount","outputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bool","name":"_roundUp","type":"bool"},{"internalType":"bool","name":"_previewInterest","type":"bool"}],"name":"toAssetShares","outputs":[{"internalType":"uint256","name":"_shares","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"},{"internalType":"bool","name":"_roundUp","type":"bool"},{"internalType":"bool","name":"_previewInterest","type":"bool"}],"name":"toBorrowAmount","outputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bool","name":"_roundUp","type":"bool"},{"internalType":"bool","name":"_previewInterest","type":"bool"}],"name":"toBorrowShares","outputs":[{"internalType":"uint256","name":"_shares","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAsset","outputs":[{"internalType":"uint128","name":"amount","type":"uint128"},{"internalType":"uint128","name":"shares","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAssets","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalBorrow","outputs":[{"internalType":"uint128","name":"amount","type":"uint128"},{"internalType":"uint128","name":"shares","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalCollateral","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newTimelock","type":"address"}],"name":"transferTimelock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"updateExchangeRate","outputs":[{"internalType":"bool","name":"_isBorrowAllowed","type":"bool"},{"internalType":"uint256","name":"_lowExchangeRate","type":"uint256"},{"internalType":"uint256","name":"_highExchangeRate","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userBorrowShares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userCollateralBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"_major","type":"uint256"},{"internalType":"uint256","name":"_minor","type":"uint256"},{"internalType":"uint256","name":"_patch","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"_sharesToBurn","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint128","name":"_shares","type":"uint128"},{"internalType":"address","name":"_recipient","type":"address"}],"name":"withdrawFees","outputs":[{"internalType":"uint256","name":"_amountToTransfer","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _configData (bytes): 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
Arg [1] : _immutables (bytes): 0x000000000000000000000000fd3065c629ee890fd74f43b802c2fea4b7279b8c000000000000000000000000168200cf227d4543302686124ac28ae0eaf2ca0b0000000000000000000000008412ebf45bac1b340bbe8f318b928c466c4e39ca
Arg [2] : _customConfigData (bytes): 0x000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000037467261786c656e6420496e7465726573742042656172696e67204652415820285374616b6564204672617820457468657229202d203136000000000000000000000000000000000000000000000000000000000000000000000000000000001166465241582873667278455448292d3136000000000000000000000000000000
-----Encoded View---------------
26 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 00000000000000000000000000000000000000000000000000000000000001a0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000220
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [4] : 000000000000000000000000853d955acef822db058eb8505911ed77f175b99e
Arg [5] : 000000000000000000000000ac3e018457b222d93114458476f3e3416abbe38f
Arg [6] : 000000000000000000000000d2f0fa7f2e6a60eecf4b78c5b6d81002b9789f2c
Arg [7] : 0000000000000000000000000000000000000000000000000000000000001388
Arg [8] : 00000000000000000000000018500cb1f2fe7a40ebda393383a0b8548a31f261
Arg [9] : 0000000000000000000000000000000000000000000000000000000235ef7f68
Arg [10] : 00000000000000000000000000000000000000000000000000000000000124f8
Arg [11] : 0000000000000000000000000000000000000000000000000000000000002710
Arg [12] : 00000000000000000000000000000000000000000000000000000000000007d0
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [14] : 000000000000000000000000fd3065c629ee890fd74f43b802c2fea4b7279b8c
Arg [15] : 000000000000000000000000168200cf227d4543302686124ac28ae0eaf2ca0b
Arg [16] : 0000000000000000000000008412ebf45bac1b340bbe8f318b928c466c4e39ca
Arg [17] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [18] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [19] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [20] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [21] : 0000000000000000000000000000000000000000000000000000000000000037
Arg [22] : 467261786c656e6420496e7465726573742042656172696e6720465241582028
Arg [23] : 5374616b6564204672617820457468657229202d203136000000000000000000
Arg [24] : 0000000000000000000000000000000000000000000000000000000000000011
Arg [25] : 66465241582873667278455448292d3136000000000000000000000000000000
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