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0x52db830374e25b1ba4ff2b97071c32be24c46721299bd9a6b7588a505b53aa0d | Request Withdraw | (pending) | 29 hrs ago | IN | 0 ETH | (Pending) | |||
0x1e788515f61a1e0a03a4cd42862782f59c6d17c258b2e3dd6a4537db5ad2d005 | Request Withdraw | (pending) | 29 hrs ago | IN | 0 ETH | (Pending) | |||
0xc23982c6e6171129915f1c15e24765d20d45dac0b32cc7305b5024a89afaa22c | Request Withdraw | (pending) | 30 hrs ago | IN | 0 ETH | (Pending) | |||
Complete Withdra... | 21464130 | 1 min ago | IN | 0 ETH | 0.00055476 | ||||
Complete Withdra... | 21464100 | 7 mins ago | IN | 0 ETH | 0.00076793 | ||||
Request Withdraw | 21464047 | 18 mins ago | IN | 0 ETH | 0.00104425 | ||||
Request Withdraw | 21463963 | 35 mins ago | IN | 0 ETH | 0.001045 | ||||
Request Withdraw | 21463960 | 35 mins ago | IN | 0 ETH | 0.00102988 | ||||
Request Withdraw | 21463924 | 42 mins ago | IN | 0 ETH | 0.00106183 | ||||
Request Withdraw | 21463805 | 1 hr ago | IN | 0 ETH | 0.00095572 | ||||
Complete Withdra... | 21463754 | 1 hr ago | IN | 0 ETH | 0.00096328 | ||||
Request Withdraw | 21463728 | 1 hr ago | IN | 0 ETH | 0.00097983 | ||||
Request Withdraw | 21463684 | 1 hr ago | IN | 0 ETH | 0.00077222 | ||||
Complete Withdra... | 21463672 | 1 hr ago | IN | 0 ETH | 0.00074392 | ||||
Request Withdraw | 21463532 | 2 hrs ago | IN | 0 ETH | 0.00063895 | ||||
Complete Withdra... | 21463435 | 2 hrs ago | IN | 0 ETH | 0.0007622 | ||||
Complete Withdra... | 21463377 | 2 hrs ago | IN | 0 ETH | 0.00052112 | ||||
Request Withdraw | 21463188 | 3 hrs ago | IN | 0 ETH | 0.00080738 | ||||
Complete Withdra... | 21463162 | 3 hrs ago | IN | 0 ETH | 0.00067217 | ||||
Request Withdraw | 21463063 | 3 hrs ago | IN | 0 ETH | 0.00108036 | ||||
Request Withdraw | 21462997 | 3 hrs ago | IN | 0 ETH | 0.00093616 | ||||
Complete Withdra... | 21462955 | 3 hrs ago | IN | 0 ETH | 0.00075412 | ||||
Complete Withdra... | 21462939 | 4 hrs ago | IN | 0 ETH | 0.00068313 | ||||
Complete Withdra... | 21462865 | 4 hrs ago | IN | 0 ETH | 0.00066489 | ||||
Request Withdraw | 21462859 | 4 hrs ago | IN | 0 ETH | 0.00090436 |
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Contract Source Code Verified (Exact Match)
Contract Name:
DelayedWithdraw
Compiler Version
v0.8.25+commit.b61c2a91
Optimization Enabled:
Yes with 10000 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity >=0.8.18; import { IVault } from "./interfaces/IVault.sol"; import { FixedPointMathLib } from "@solmate/utils/FixedPointMathLib.sol"; import { Auth, Authority } from "@solmate/auth/Auth.sol"; import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/math/Math.sol"; contract DelayedWithdraw is Auth, ReentrancyGuard { using SafeERC20 for IERC20Metadata; using SafeERC20 for ERC20; using FixedPointMathLib for uint256; // ========================================= STRUCTS ========================================= /** * @param allowWithdraws Whether or not withdrawals are allowed for this asset. * @param withdrawDelay The delay in seconds before a requested withdrawal can be completed. * @param outstandingShares The total number of shares that are currently outstanding for an asset. * @param withdrawFee The fee that is charged when a withdrawal is completed. * @param maxLoss The maximum loss that can be incurred when completing a withdrawal, evaluating the * exchange rate at time of withdraw, compared to time of completion. * @param maxWithdrawPerUser maximum withdraw per user */ struct WithdrawAsset { bool allowWithdraws; uint32 withdrawDelay; uint128 outstandingShares; uint16 withdrawFee; uint16 maxLoss; uint256 maxWithdrawPerUser; } /** * @param allowThirdPartyToComplete Whether or not a 3rd party can complete a withdraw on behalf of a user. * @param maturity The time at which the withdrawal can be completed. * @param shares The number of shares that are requested to be withdrawn. * @param assetsAtTimeOfRequest The exchange rate at the time of the request. */ struct WithdrawRequest { bool allowThirdPartyToComplete; uint40 maturity; uint96 shares; uint256 assetsAtTimeOfRequest; } struct WithdrawUserRequests { mapping(uint256 => WithdrawRequest) requests; uint256[] keys; uint256 lastIdx; } // ========================================= CONSTANTS ========================================= /** * @notice The largest withdraw fee that can be set. */ uint16 internal constant MAX_WITHDRAW_FEE = 0.2e4; /** * @notice The largest max loss that can be set. */ uint16 internal constant MAX_LOSS = 10_000; // ========================================= STATE ========================================= /** * @notice The address that receives the fee when a withdrawal is completed. */ address public feeAddress; /** * @notice The mapping of assets to their respective withdrawal settings. */ mapping(ERC20 => WithdrawAsset) public withdrawAssets; /** * @notice The mapping of users to withdraw asset to their withdrawal requests. */ mapping(address => mapping(ERC20 => WithdrawUserRequests)) internal withdrawRequests; /** * @notice Used to pause calls to `requestWithdraw`, and `completeWithdraw`. */ bool public isPaused; //============================== ERRORS =============================== error DelayedWithdraw__WithdrawFeeTooHigh(); error DelayedWithdraw__MaxLossTooLarge(); error DelayedWithdraw__AlreadySetup(); error DelayedWithdraw__WithdrawsNotAllowed(); error DelayedWithdraw__WithdrawNotMatured(); error DelayedWithdraw__NoSharesToWithdraw(); error DelayedWithdraw__MaxLossExceeded(); error DelayedWithdraw__transferNotAllowed(); error DelayedWithdraw__WrongVaultStrategy(); error DelayedWithdraw__BadAddress(); error DelayedWithdraw__ThirdPartyCompletionNotAllowed(); error DelayedWithdraw__WrongAsset(); error DelayedWithdraw__Paused(); error DelayedWithdraw__SharesIs0(); error DelayedWithdraw__ExceedsMaxWithdrawPerUser(); //============================== EVENTS =============================== event WithdrawRequested( address indexed account, ERC20 indexed asset, uint96 shares, uint40 maturity, bool allowThirdPartyToComplete, uint256 indexed withdrawalIdx ); event WithdrawCancelled(address indexed account, ERC20 indexed asset, uint96 shares, uint256 indexed withdrawalIdx); event WithdrawCompleted( address indexed account, ERC20 indexed asset, uint256 shares, uint256 assets, uint256 indexed withdrawalIdx ); event FeeAddressSet(address newFeeAddress); event SetupWithdrawalsInAsset( address indexed asset, uint64 withdrawDelay, uint16 withdrawFee, uint16 maxLoss, uint256 maxWithdrawPerUser ); event WithdrawDelayUpdated(address indexed asset, uint256 newWithdrawDelay); event WithdrawFeeUpdated(address indexed asset, uint16 newWithdrawFee); event MaxLossUpdated(address indexed asset, uint16 newMaxLoss); event WithdrawalsStopped(address indexed asset); event ThirdPartyCompletionChanged( address indexed account, ERC20 indexed asset, bool allowed, uint256 indexed withdrawalIdx ); event WithrawalCompleted(address indexed account, uint256 indexed withdrawalIdx); event Paused(); event Unpaused(); event MaxWithdrawPerUserUpdated(address indexed asset, uint256 newMaxWithdrawPerUser); //============================== IMMUTABLES =============================== /** * @notice The VaultV3 contract that users are withdrawing from. */ IVault internal immutable lrtVault; constructor(address _owner, address _lrtVault, address _feeAddress) Auth(_owner, Authority(address(0))) { lrtVault = IVault(payable(_lrtVault)); if (_feeAddress == address(0)) revert DelayedWithdraw__BadAddress(); feeAddress = _feeAddress; emit FeeAddressSet(_feeAddress); } // ========================================= ADMIN FUNCTIONS ========================================= /** * @notice Pause this contract. * @dev Callable by MULTISIG_ROLE. */ function pause() external requiresAuth { isPaused = true; emit Paused(); } /** * @notice Unpause this contract. * @dev Callable by MULTISIG_ROLE. */ function unpause() external requiresAuth { isPaused = false; emit Unpaused(); } /** * @notice Stops withdrawals for a specific asset. * @dev Callable by MULTISIG_ROLE. */ function stopWithdrawalsInAsset(ERC20 asset) external requiresAuth { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; if (!withdrawAsset.allowWithdraws) revert DelayedWithdraw__WithdrawsNotAllowed(); withdrawAsset.allowWithdraws = false; emit WithdrawalsStopped(address(asset)); } /** * @notice Sets up the withdrawal settings for a specific asset. * @dev Callable by OWNER_ROLE. */ function setupWithdrawAsset( ERC20 asset, uint32 withdrawDelay, uint16 withdrawFee, uint16 maxLoss, uint256 maxWithdrawPerUser ) external requiresAuth { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; if (withdrawFee > MAX_WITHDRAW_FEE) revert DelayedWithdraw__WithdrawFeeTooHigh(); if (maxLoss > MAX_LOSS) revert DelayedWithdraw__MaxLossTooLarge(); if (withdrawAsset.allowWithdraws) revert DelayedWithdraw__AlreadySetup(); if (address(asset) != lrtVault.asset()) revert DelayedWithdraw__WrongAsset(); withdrawAsset.allowWithdraws = true; withdrawAsset.withdrawDelay = withdrawDelay; withdrawAsset.withdrawFee = withdrawFee; withdrawAsset.maxLoss = maxLoss; withdrawAsset.maxWithdrawPerUser = maxWithdrawPerUser; emit SetupWithdrawalsInAsset(address(asset), withdrawDelay, withdrawFee, maxLoss, maxWithdrawPerUser); } /** * @notice Changes the withdraw delay for a specific asset. * @dev Callable by MULTISIG_ROLE. */ function changeWithdrawDelay(ERC20 asset, uint32 withdrawDelay) external requiresAuth { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; if (!withdrawAsset.allowWithdraws) revert DelayedWithdraw__WithdrawsNotAllowed(); withdrawAsset.withdrawDelay = withdrawDelay; emit WithdrawDelayUpdated(address(asset), withdrawDelay); } /** * @notice Changes the withdraw fee for a specific asset. * @dev Callable by OWNER_ROLE. */ function changeWithdrawFee(ERC20 asset, uint16 withdrawFee) external requiresAuth { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; if (!withdrawAsset.allowWithdraws) revert DelayedWithdraw__WithdrawsNotAllowed(); if (withdrawFee > MAX_WITHDRAW_FEE) revert DelayedWithdraw__WithdrawFeeTooHigh(); withdrawAsset.withdrawFee = withdrawFee; emit WithdrawFeeUpdated(address(asset), withdrawFee); } /** * @notice Changes the max loss for a specific asset. * @dev Callable by OWNER_ROLE. * @dev Since maxLoss is a global value based off some withdraw asset, it is possible that a user * creates a request, then the maxLoss is updated to some value the user is not comfortable with. * In this case the user should cancel their request. However this is not always possible, so a * better course of action would be if the maxLoss needs to be updated, the asset can be fully removed. * Then all exisitng requests for that asset can be cancelled, and finally the maxLoss can be updated. */ function changeMaxLoss(ERC20 asset, uint16 maxLoss) external requiresAuth { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; if (!withdrawAsset.allowWithdraws) revert DelayedWithdraw__WithdrawsNotAllowed(); if (maxLoss > MAX_LOSS) revert DelayedWithdraw__MaxLossTooLarge(); withdrawAsset.maxLoss = maxLoss; emit MaxLossUpdated(address(asset), maxLoss); } /** * @notice Changes the fee address. * @dev Callable by STRATEGIST_MULTISIG_ROLE. */ function setFeeAddress(address _feeAddress) external requiresAuth { if (_feeAddress == address(0)) revert DelayedWithdraw__BadAddress(); feeAddress = _feeAddress; emit FeeAddressSet(_feeAddress); } /** * @notice Sets the maximum withdrawal amount per user for a specific asset. * @dev Callable by OWNER_ROLE. * @param asset The ERC20 token address * @param maxWithdraw The maximum amount a user can withdraw */ function setMaxWithdrawPerUser(ERC20 asset, uint256 maxWithdraw) external requiresAuth { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; withdrawAsset.maxWithdrawPerUser = maxWithdraw; emit MaxWithdrawPerUserUpdated(address(asset), maxWithdraw); } /** * @notice Cancels a user's withdrawal request. * @dev Callable by MULTISIG_ROLE, and STRATEGIST_MULTISIG_ROLE. */ function cancelUserWithdraw(ERC20 asset, address user, uint256 withdrawalIdx) external requiresAuth { _cancelWithdraw(asset, user, withdrawalIdx); } /** * @notice Completes a user's withdrawal request. * @dev Admins can complete requests even if they are outside the completion window. * @dev Callable by MULTISIG_ROLE, and STRATEGIST_MULTISIG_ROLE. */ function completeUserWithdraw( ERC20 asset, address user, uint256 withdrawalIdx ) external requiresAuth returns (uint256 assetsOut) { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; WithdrawUserRequests storage userRequests = withdrawRequests[user][asset]; WithdrawRequest storage req = userRequests.requests[withdrawalIdx]; assetsOut = _completeWithdraw(asset, user, withdrawAsset, req, withdrawalIdx); _deleteWithdrawRequest(userRequests, withdrawalIdx); } // ========================================= PUBLIC FUNCTIONS ========================================= /** * @notice Allows a user to set whether or not a 3rd party can complete withdraws on behalf of them. */ function setAllowThirdPartyToComplete(ERC20 asset, bool allow, uint256 withdrawalIdx) external requiresAuth { withdrawRequests[msg.sender][asset].requests[withdrawalIdx].allowThirdPartyToComplete = allow; emit ThirdPartyCompletionChanged(msg.sender, asset, allow, withdrawalIdx); } /** * @notice Requests a withdrawal of shares for a specific asset. * @dev Publicly callable. */ function requestWithdraw( ERC20 asset, uint96 shares, bool allowThirdPartyToComplete ) external requiresAuth nonReentrant { if (isPaused) revert DelayedWithdraw__Paused(); WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; if (!withdrawAsset.allowWithdraws) revert DelayedWithdraw__WithdrawsNotAllowed(); if (shares == 0) revert DelayedWithdraw__SharesIs0(); WithdrawUserRequests storage userRequests = withdrawRequests[msg.sender][asset]; if (userRequests.keys.length >= withdrawAsset.maxWithdrawPerUser) { revert DelayedWithdraw__ExceedsMaxWithdrawPerUser(); } IERC20Metadata(lrtVault).safeTransferFrom(msg.sender, address(this), shares); withdrawAsset.outstandingShares += shares; uint256 lastIdx = userRequests.lastIdx + 1; userRequests.lastIdx = lastIdx; userRequests.keys.push(lastIdx); uint40 maturity = uint40(block.timestamp + withdrawAsset.withdrawDelay); userRequests.requests[lastIdx] = WithdrawRequest({ allowThirdPartyToComplete: allowThirdPartyToComplete, maturity: maturity, assetsAtTimeOfRequest: lrtVault.previewRedeem(shares), shares: shares }); emit WithdrawRequested(msg.sender, asset, shares, maturity, allowThirdPartyToComplete, lastIdx); } /** * @notice Cancels msg.sender's withdrawal request. * @dev not callable in a regular mode. */ function cancelWithdraw(ERC20 asset, uint256 withdrawalIdx) external requiresAuth nonReentrant { _cancelWithdraw(asset, msg.sender, withdrawalIdx); } /** * @notice Completes a user's withdrawal request. * @dev Publicly callable. */ function completeWithdraw( ERC20 asset, address account, uint256 withdrawalIdx ) external requiresAuth nonReentrant returns (uint256 assetsOut) { if (isPaused) revert DelayedWithdraw__Paused(); WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; WithdrawUserRequests storage userRequests = withdrawRequests[account][asset]; WithdrawRequest storage req = userRequests.requests[withdrawalIdx]; if (msg.sender != account && !req.allowThirdPartyToComplete) { revert DelayedWithdraw__ThirdPartyCompletionNotAllowed(); } assetsOut = _completeWithdraw(asset, account, withdrawAsset, req, withdrawalIdx); _deleteWithdrawRequest(userRequests, withdrawalIdx); emit WithrawalCompleted(account, withdrawalIdx); } /** * @notice Transfers any leftover balance (dust) of the specified ERC20 asset to the strategy vault. * @dev This function ensures that any remaining tokens in the contract are moved to the strategy. * Reverts if the asset is the same as the lrtVault. * Callable by MULTISIG_ROLE * @param asset The ERC20 asset from which dust is to be transferred. */ function transferDustToStrategy(ERC20 asset) external requiresAuth { if (address(asset) == address(lrtVault)) revert DelayedWithdraw__transferNotAllowed(); address[] memory default_queue = lrtVault.get_default_queue(); if (default_queue.length != 1) revert DelayedWithdraw__WrongVaultStrategy(); uint256 balance = asset.balanceOf(address(this)); if (balance > 0) { asset.safeTransfer(default_queue[0], balance); } } /** * @notice Transfers the specified number of locked shares to the given account. * @dev Uses the safeTransfer function of the IERC20Metadata interface to ensure the transfer is safe. * Callable by OWNER */ function safeLockedShares(address account, uint256 shares, ERC20 asset) external requiresAuth { if (address(asset) != address(lrtVault)) revert DelayedWithdraw__transferNotAllowed(); WithdrawAsset memory withdrawAsset = withdrawAssets[ERC20(lrtVault.asset())]; if (withdrawAsset.outstandingShares + shares > asset.balanceOf(address(this))) revert DelayedWithdraw__transferNotAllowed(); IERC20Metadata(asset).safeTransfer(account, shares); } // ========================================= VIEW FUNCTIONS ========================================= /** * @notice Helper function to view the outstanding withdraw debt for a specific asset. */ function viewOutstandingDebt(ERC20 asset) public view returns (uint256 debt) { debt = lrtVault.previewRedeem(withdrawAssets[asset].outstandingShares); } /** * @notice Helper function to view the outstanding withdraw debt for multiple assets. */ function viewOutstandingDebts(ERC20[] calldata assets) external view returns (uint256[] memory debts) { debts = new uint256[](assets.length); for (uint256 i = 0; i < assets.length; i++) { debts[i] = viewOutstandingDebt(assets[i]); } } /// @notice Retrieves all withdraw requests for a given user and asset /// @param user The address of the user /// @param asset The ERC20 token address /// @return requests An array of WithdrawRequest structures /// @return keys An array of keys corresponding to each WithdrawRequest /// @return lastIdx The last index used for withdraw requests function getAllWithdrawRequests( address user, ERC20 asset ) public view returns (WithdrawRequest[] memory requests, uint256[] memory keys, uint256 lastIdx) { WithdrawUserRequests storage userRequests = withdrawRequests[user][asset]; keys = userRequests.keys; uint256 keyCount = keys.length; requests = new WithdrawRequest[](keyCount); for (uint256 i = 0; i < keyCount; i++) { requests[i] = userRequests.requests[keys[i]]; } lastIdx = userRequests.lastIdx; return (requests, keys, lastIdx); } /// @notice Retrieves a single withdraw request for a given user, asset, and withdrawal index /// @param user The address of the user /// @param asset The ERC20 token address /// @param withdrawalIdx The index of the withdrawal request /// @return A WithdrawRequest structure function getWithdrawRequest( address user, ERC20 asset, uint256 withdrawalIdx ) external view returns (WithdrawRequest memory) { return withdrawRequests[user][asset].requests[withdrawalIdx]; } /// @notice Retrieves the array of keys for withdraw requests of a given user and asset /// @param user The address of the user /// @param asset The ERC20 token address /// @return An array of uint256 keys function getWithdrawRequestKeys(address user, ERC20 asset) external view returns (uint256[] memory) { return withdrawRequests[user][asset].keys; } /// @notice Retrieves the last index used for withdraw requests of a given user and asset /// @param user The address of the user /// @param asset The ERC20 token address /// @return The last index (uint256) used function getWithdrawRequestLastIdx(address user, ERC20 asset) external view returns (uint256) { return withdrawRequests[user][asset].lastIdx; } // ========================================= INTERNAL FUNCTIONS ========================================= /** * @notice Internal helper function that implements shared logic for cancelling a user's withdrawal request. */ function _cancelWithdraw(ERC20 asset, address account, uint256 withdrawalIdx) internal { WithdrawAsset storage withdrawAsset = withdrawAssets[asset]; // We do not check if `asset` is allowed, to handle edge cases where the asset is no longer allowed. WithdrawUserRequests storage userRequests = withdrawRequests[account][asset]; WithdrawRequest storage req = userRequests.requests[withdrawalIdx]; uint96 shares = req.shares; if (shares == 0) revert DelayedWithdraw__NoSharesToWithdraw(); withdrawAsset.outstandingShares -= shares; req.shares = 0; IERC20Metadata(lrtVault).safeTransfer(account, shares); _deleteWithdrawRequest(userRequests, withdrawalIdx); emit WithdrawCancelled(account, asset, shares, withdrawalIdx); } /** * @notice Internal helper function that implements shared logic for completing a user's withdrawal request. */ function _completeWithdraw( ERC20 asset, address account, WithdrawAsset storage withdrawAsset, WithdrawRequest storage req, uint256 withdrawalIdx ) internal returns (uint256 minAssetToWithdraw) { if (!withdrawAsset.allowWithdraws) revert DelayedWithdraw__WithdrawsNotAllowed(); if (block.timestamp < req.maturity) revert DelayedWithdraw__WithdrawNotMatured(); uint256 shares = req.shares; if (shares == 0) revert DelayedWithdraw__NoSharesToWithdraw(); uint256 currentAssetToWithdraw = lrtVault.previewRedeem(shares); minAssetToWithdraw = req.assetsAtTimeOfRequest < currentAssetToWithdraw ? req.assetsAtTimeOfRequest : currentAssetToWithdraw; // Safe to cast shares to a uint128 since req.shares is constrained to be less than 2^96. withdrawAsset.outstandingShares -= uint128(shares); if (withdrawAsset.withdrawFee > 0 && msg.sender != feeAddress) { // Handle withdraw fee. uint256 fee = uint256(shares).mulDivDown(withdrawAsset.withdrawFee, 1e4); shares -= fee; minAssetToWithdraw -= minAssetToWithdraw.mulDivDown(withdrawAsset.withdrawFee, 1e4); // Transfer fee to feeAddress. IERC20Metadata(lrtVault).safeTransfer(feeAddress, fee); } req.shares = 0; uint256 balanceBefore = asset.balanceOf(address(this)); lrtVault.redeem(shares, address(this), address(this), withdrawAsset.maxLoss); uint256 balanceAfter = asset.balanceOf(address(this)); minAssetToWithdraw = Math.min(balanceAfter - balanceBefore, minAssetToWithdraw); asset.safeTransfer(account, minAssetToWithdraw); emit WithdrawCompleted(account, asset, shares, minAssetToWithdraw, withdrawalIdx); } function _deleteWithdrawRequest(WithdrawUserRequests storage userRequests, uint256 withdrawalIdx) internal { // Delete the request from the mapping delete userRequests.requests[withdrawalIdx]; // Remove the withdrawalIdx from the keys array uint256 lastIndex = userRequests.keys.length - 1; for (uint256 i = 0; i <= lastIndex; i++) { if (userRequests.keys[i] == withdrawalIdx) { if (i != lastIndex) { userRequests.keys[i] = userRequests.keys[lastIndex]; } userRequests.keys.pop(); break; } } } }
// SPDX-License-Identifier: GPL-3.0 pragma solidity >=0.8.18; import { IERC4626 } from "@openzeppelin/contracts/interfaces/IERC4626.sol"; interface IVault is IERC4626 { // STRATEGY EVENTS event StrategyChanged(address indexed strategy, uint256 change_type); event StrategyReported( address indexed strategy, uint256 gain, uint256 loss, uint256 current_debt, uint256 protocol_fees, uint256 total_fees, uint256 total_refunds ); // DEBT MANAGEMENT EVENTS event DebtUpdated(address indexed strategy, uint256 current_debt, uint256 new_debt); // ROLE UPDATES event RoleSet(address indexed account, uint256 role); event UpdateRoleManager(address indexed role_manager); event UpdateAccountant(address indexed accountant); event UpdateDefaultQueue(address[] new_default_queue); event UpdateUseDefaultQueue(bool use_default_queue); event UpdatedMaxDebtForStrategy(address indexed sender, address indexed strategy, uint256 new_debt); event UpdateDepositLimit(uint256 deposit_limit); event UpdateMinimumTotalIdle(uint256 minimum_total_idle); event UpdateProfitMaxUnlockTime(uint256 profit_max_unlock_time); event DebtPurchased(address indexed strategy, uint256 amount); event Shutdown(); struct StrategyParams { uint256 activation; uint256 last_report; uint256 current_debt; uint256 max_debt; } function FACTORY() external view returns (uint256); function strategies(address) external view returns (StrategyParams memory); function default_queue(uint256) external view returns (address); function use_default_queue() external view returns (bool); function minimum_total_idle() external view returns (uint256); function deposit_limit() external view returns (uint256); function deposit_limit_module() external view returns (address); function withdraw_limit_module() external view returns (address); function accountant() external view returns (address); function roles(address) external view returns (uint256); function role_manager() external view returns (address); function future_role_manager() external view returns (address); function isShutdown() external view returns (bool); function nonces(address) external view returns (uint256); function initialize(address, string memory, string memory, address, uint256) external; function set_accountant(address new_accountant) external; function set_default_queue(address[] memory new_default_queue) external; function set_use_default_queue(bool) external; function set_deposit_limit(uint256 deposit_limit) external; function set_deposit_limit(uint256 deposit_limit, bool should_override) external; function set_deposit_limit_module(address new_deposit_limit_module) external; function set_deposit_limit_module(address new_deposit_limit_module, bool should_override) external; function set_withdraw_limit_module(address new_withdraw_limit_module) external; function set_minimum_total_idle(uint256 minimum_total_idle) external; function setProfitMaxUnlockTime(uint256 new_profit_max_unlock_time) external; function set_role(address account, uint256 role) external; function add_role(address account, uint256 role) external; function remove_role(address account, uint256 role) external; function transfer_role_manager(address role_manager) external; function accept_role_manager() external; function unlockedShares() external view returns (uint256); function pricePerShare() external view returns (uint256); function get_default_queue() external view returns (address[] memory); function process_report(address strategy) external returns (uint256, uint256); function buy_debt(address strategy, uint256 amount) external; function add_strategy(address new_strategy) external; function revoke_strategy(address strategy) external; function force_revoke_strategy(address strategy) external; function update_max_debt_for_strategy(address strategy, uint256 new_max_debt) external; function update_debt(address strategy, uint256 target_debt) external returns (uint256); function update_debt(address strategy, uint256 target_debt, uint256 max_loss) external returns (uint256); function shutdown_vault() external; function totalIdle() external view returns (uint256); function totalDebt() external view returns (uint256); function apiVersion() external view returns (string memory); function assess_share_of_unrealised_losses( address strategy, uint256 assets_needed ) external view returns (uint256); function profitMaxUnlockTime() external view returns (uint256); function fullProfitUnlockDate() external view returns (uint256); function profitUnlockingRate() external view returns (uint256); function lastProfitUpdate() external view returns (uint256); //// NON-STANDARD ERC-4626 FUNCTIONS \\\\ function withdraw(uint256 assets, address receiver, address owner, uint256 max_loss) external returns (uint256); function withdraw( uint256 assets, address receiver, address owner, uint256 max_loss, address[] memory strategies ) external returns (uint256); function redeem(uint256 shares, address receiver, address owner, uint256 max_loss) external returns (uint256); function redeem( uint256 shares, address receiver, address owner, uint256 max_loss, address[] memory strategies ) external returns (uint256); function maxWithdraw(address owner, uint256 max_loss) external view returns (uint256); function maxWithdraw( address owner, uint256 max_loss, address[] memory strategies ) external view returns (uint256); function maxRedeem(address owner, uint256 max_loss) external view returns (uint256); function maxRedeem(address owner, uint256 max_loss, address[] memory strategies) external view returns (uint256); //// NON-STANDARD ERC-20 FUNCTIONS \\\\ function DOMAIN_SEPARATOR() external view returns (bytes32); function permit( address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external returns (bool); function convertToAssets(uint256 shares) external view returns (uint256); function balanceOf(address) external view returns (uint256); }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; /// @notice Arithmetic library with operations for fixed-point numbers. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/FixedPointMathLib.sol) /// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol) library FixedPointMathLib { /*////////////////////////////////////////////////////////////// SIMPLIFIED FIXED POINT OPERATIONS //////////////////////////////////////////////////////////////*/ uint256 internal constant MAX_UINT256 = 2**256 - 1; uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s. function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down. } function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up. } function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down. } function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) { return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up. } /*////////////////////////////////////////////////////////////// LOW LEVEL FIXED POINT OPERATIONS //////////////////////////////////////////////////////////////*/ function mulDivDown( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y)) if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) { revert(0, 0) } // Divide x * y by the denominator. z := div(mul(x, y), denominator) } } function mulDivUp( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y)) if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) { revert(0, 0) } // If x * y modulo the denominator is strictly greater than 0, // 1 is added to round up the division of x * y by the denominator. z := add(gt(mod(mul(x, y), denominator), 0), div(mul(x, y), denominator)) } } function rpow( uint256 x, uint256 n, uint256 scalar ) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { switch x case 0 { switch n case 0 { // 0 ** 0 = 1 z := scalar } default { // 0 ** n = 0 z := 0 } } default { switch mod(n, 2) case 0 { // If n is even, store scalar in z for now. z := scalar } default { // If n is odd, store x in z for now. z := x } // Shifting right by 1 is like dividing by 2. let half := shr(1, scalar) for { // Shift n right by 1 before looping to halve it. n := shr(1, n) } n { // Shift n right by 1 each iteration to halve it. n := shr(1, n) } { // Revert immediately if x ** 2 would overflow. // Equivalent to iszero(eq(div(xx, x), x)) here. if shr(128, x) { revert(0, 0) } // Store x squared. let xx := mul(x, x) // Round to the nearest number. let xxRound := add(xx, half) // Revert if xx + half overflowed. if lt(xxRound, xx) { revert(0, 0) } // Set x to scaled xxRound. x := div(xxRound, scalar) // If n is even: if mod(n, 2) { // Compute z * x. let zx := mul(z, x) // If z * x overflowed: if iszero(eq(div(zx, x), z)) { // Revert if x is non-zero. if iszero(iszero(x)) { revert(0, 0) } } // Round to the nearest number. let zxRound := add(zx, half) // Revert if zx + half overflowed. if lt(zxRound, zx) { revert(0, 0) } // Return properly scaled zxRound. z := div(zxRound, scalar) } } } } } /*////////////////////////////////////////////////////////////// GENERAL NUMBER UTILITIES //////////////////////////////////////////////////////////////*/ function sqrt(uint256 x) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { let y := x // We start y at x, which will help us make our initial estimate. z := 181 // The "correct" value is 1, but this saves a multiplication later. // This segment is to get a reasonable initial estimate for the Babylonian method. With a bad // start, the correct # of bits increases ~linearly each iteration instead of ~quadratically. // We check y >= 2^(k + 8) but shift right by k bits // each branch to ensure that if x >= 256, then y >= 256. if iszero(lt(y, 0x10000000000000000000000000000000000)) { y := shr(128, y) z := shl(64, z) } if iszero(lt(y, 0x1000000000000000000)) { y := shr(64, y) z := shl(32, z) } if iszero(lt(y, 0x10000000000)) { y := shr(32, y) z := shl(16, z) } if iszero(lt(y, 0x1000000)) { y := shr(16, y) z := shl(8, z) } // Goal was to get z*z*y within a small factor of x. More iterations could // get y in a tighter range. Currently, we will have y in [256, 256*2^16). // We ensured y >= 256 so that the relative difference between y and y+1 is small. // That's not possible if x < 256 but we can just verify those cases exhaustively. // Now, z*z*y <= x < z*z*(y+1), and y <= 2^(16+8), and either y >= 256, or x < 256. // Correctness can be checked exhaustively for x < 256, so we assume y >= 256. // Then z*sqrt(y) is within sqrt(257)/sqrt(256) of sqrt(x), or about 20bps. // For s in the range [1/256, 256], the estimate f(s) = (181/1024) * (s+1) is in the range // (1/2.84 * sqrt(s), 2.84 * sqrt(s)), with largest error when s = 1 and when s = 256 or 1/256. // Since y is in [256, 256*2^16), let a = y/65536, so that a is in [1/256, 256). Then we can estimate // sqrt(y) using sqrt(65536) * 181/1024 * (a + 1) = 181/4 * (y + 65536)/65536 = 181 * (y + 65536)/2^18. // There is no overflow risk here since y < 2^136 after the first branch above. z := shr(18, mul(z, add(y, 65536))) // A mul() is saved from starting z at 181. // Given the worst case multiplicative error of 2.84 above, 7 iterations should be enough. z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) z := shr(1, add(z, div(x, z))) // If x+1 is a perfect square, the Babylonian method cycles between // floor(sqrt(x)) and ceil(sqrt(x)). This statement ensures we return floor. // See: https://en.wikipedia.org/wiki/Integer_square_root#Using_only_integer_division // Since the ceil is rare, we save gas on the assignment and repeat division in the rare case. // If you don't care whether the floor or ceil square root is returned, you can remove this statement. z := sub(z, lt(div(x, z), z)) } } function unsafeMod(uint256 x, uint256 y) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Mod x by y. Note this will return // 0 instead of reverting if y is zero. z := mod(x, y) } } function unsafeDiv(uint256 x, uint256 y) internal pure returns (uint256 r) { /// @solidity memory-safe-assembly assembly { // Divide x by y. Note this will return // 0 instead of reverting if y is zero. r := div(x, y) } } function unsafeDivUp(uint256 x, uint256 y) internal pure returns (uint256 z) { /// @solidity memory-safe-assembly assembly { // Add 1 to x * y if x % y > 0. Note this will // return 0 instead of reverting if y is zero. z := add(gt(mod(x, y), 0), div(x, y)) } } }
// SPDX-License-Identifier: AGPL-3.0-only pragma solidity >=0.8.0; /// @notice Provides a flexible and updatable auth pattern which is completely separate from application logic. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Auth.sol) /// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol) abstract contract Auth { event OwnershipTransferred(address indexed user, address indexed newOwner); event AuthorityUpdated(address indexed user, Authority indexed newAuthority); address public owner; Authority public authority; constructor(address _owner, Authority _authority) { owner = _owner; authority = _authority; emit OwnershipTransferred(msg.sender, _owner); emit AuthorityUpdated(msg.sender, _authority); } modifier requiresAuth() virtual { require(isAuthorized(msg.sender, msg.sig), "UNAUTHORIZED"); _; } function isAuthorized(address user, bytes4 functionSig) internal view virtual returns (bool) { Authority auth = authority; // Memoizing authority saves us a warm SLOAD, around 100 gas. // Checking if the caller is the owner only after calling the authority saves gas in most cases, but be // aware that this makes protected functions uncallable even to the owner if the authority is out of order. return (address(auth) != address(0) && auth.canCall(user, address(this), functionSig)) || user == owner; } function setAuthority(Authority newAuthority) public virtual { // We check if the caller is the owner first because we want to ensure they can // always swap out the authority even if it's reverting or using up a lot of gas. require(msg.sender == owner || authority.canCall(msg.sender, address(this), msg.sig)); authority = newAuthority; emit AuthorityUpdated(msg.sender, newAuthority); } function transferOwnership(address newOwner) public virtual requiresAuth { owner = newOwner; emit OwnershipTransferred(msg.sender, newOwner); } } /// @notice A generic interface for a contract which provides authorization data to an Auth instance. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Auth.sol) /// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol) interface Authority { function canCall( address user, address target, bytes4 functionSig ) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } }
// SPDX-License-Identifier: 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 v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * 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}. * * 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 default value returned by this function, unless * it's 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 (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC4626.sol) pragma solidity ^0.8.0; import "../token/ERC20/IERC20.sol"; import "../token/ERC20/extensions/IERC20Metadata.sol"; /** * @dev Interface of the ERC4626 "Tokenized Vault Standard", as defined in * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626]. * * _Available since v4.7._ */ interface IERC4626 is IERC20, IERC20Metadata { event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares); event Withdraw( address indexed sender, address indexed receiver, address indexed owner, uint256 assets, uint256 shares ); /** * @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing. * * - MUST be an ERC-20 token contract. * - MUST NOT revert. */ function asset() external view returns (address assetTokenAddress); /** * @dev Returns the total amount of the underlying asset that is “managed” by Vault. * * - SHOULD include any compounding that occurs from yield. * - MUST be inclusive of any fees that are charged against assets in the Vault. * - MUST NOT revert. */ function totalAssets() external view returns (uint256 totalManagedAssets); /** * @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal * scenario where all the conditions are met. * * - MUST NOT be inclusive of any fees that are charged against assets in the Vault. * - MUST NOT show any variations depending on the caller. * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange. * - MUST NOT revert. * * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and * from. */ function convertToShares(uint256 assets) external view returns (uint256 shares); /** * @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal * scenario where all the conditions are met. * * - MUST NOT be inclusive of any fees that are charged against assets in the Vault. * - MUST NOT show any variations depending on the caller. * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange. * - MUST NOT revert. * * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and * from. */ function convertToAssets(uint256 shares) external view returns (uint256 assets); /** * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver, * through a deposit call. * * - MUST return a limited value if receiver is subject to some deposit limit. * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited. * - MUST NOT revert. */ function maxDeposit(address receiver) external view returns (uint256 maxAssets); /** * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given * current on-chain conditions. * * - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit * call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called * in the same transaction. * - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the * deposit would be accepted, regardless if the user has enough tokens approved, etc. * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees. * - MUST NOT revert. * * NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in * share price or some other type of condition, meaning the depositor will lose assets by depositing. */ function previewDeposit(uint256 assets) external view returns (uint256 shares); /** * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens. * * - MUST emit the Deposit event. * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the * deposit execution, and are accounted for during deposit. * - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not * approving enough underlying tokens to the Vault contract, etc). * * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token. */ function deposit(uint256 assets, address receiver) external returns (uint256 shares); /** * @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call. * - MUST return a limited value if receiver is subject to some mint limit. * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted. * - MUST NOT revert. */ function maxMint(address receiver) external view returns (uint256 maxShares); /** * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given * current on-chain conditions. * * - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call * in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the * same transaction. * - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint * would be accepted, regardless if the user has enough tokens approved, etc. * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees. * - MUST NOT revert. * * NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in * share price or some other type of condition, meaning the depositor will lose assets by minting. */ function previewMint(uint256 shares) external view returns (uint256 assets); /** * @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens. * * - MUST emit the Deposit event. * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint * execution, and are accounted for during mint. * - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not * approving enough underlying tokens to the Vault contract, etc). * * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token. */ function mint(uint256 shares, address receiver) external returns (uint256 assets); /** * @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the * Vault, through a withdraw call. * * - MUST return a limited value if owner is subject to some withdrawal limit or timelock. * - MUST NOT revert. */ function maxWithdraw(address owner) external view returns (uint256 maxAssets); /** * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block, * given current on-chain conditions. * * - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw * call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if * called * in the same transaction. * - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though * the withdrawal would be accepted, regardless if the user has enough shares, etc. * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees. * - MUST NOT revert. * * NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in * share price or some other type of condition, meaning the depositor will lose assets by depositing. */ function previewWithdraw(uint256 assets) external view returns (uint256 shares); /** * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver. * * - MUST emit the Withdraw event. * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the * withdraw execution, and are accounted for during withdraw. * - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner * not having enough shares, etc). * * Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed. * Those methods should be performed separately. */ function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares); /** * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault, * through a redeem call. * * - MUST return a limited value if owner is subject to some withdrawal limit or timelock. * - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock. * - MUST NOT revert. */ function maxRedeem(address owner) external view returns (uint256 maxShares); /** * @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block, * given current on-chain conditions. * * - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call * in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the * same transaction. * - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the * redemption would be accepted, regardless if the user has enough shares, etc. * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees. * - MUST NOT revert. * * NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in * share price or some other type of condition, meaning the depositor will lose assets by redeeming. */ function previewRedeem(uint256 shares) external view returns (uint256 assets); /** * @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver. * * - MUST emit the Withdraw event. * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the * redeem execution, and are accounted for during redeem. * - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner * not having enough shares, etc). * * NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed. * Those methods should be performed separately. */ function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. * * CAUTION: See Security Considerations above. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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ERC20","name":"asset","type":"address"},{"internalType":"uint16","name":"withdrawFee","type":"uint16"}],"name":"changeWithdrawFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"asset","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"withdrawalIdx","type":"uint256"}],"name":"completeUserWithdraw","outputs":[{"internalType":"uint256","name":"assetsOut","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract 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ERC20","name":"asset","type":"address"},{"internalType":"uint96","name":"shares","type":"uint96"},{"internalType":"bool","name":"allowThirdPartyToComplete","type":"bool"}],"name":"requestWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"shares","type":"uint256"},{"internalType":"contract ERC20","name":"asset","type":"address"}],"name":"safeLockedShares","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"asset","type":"address"},{"internalType":"bool","name":"allow","type":"bool"},{"internalType":"uint256","name":"withdrawalIdx","type":"uint256"}],"name":"setAllowThirdPartyToComplete","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract Authority","name":"newAuthority","type":"address"}],"name":"setAuthority","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_feeAddress","type":"address"}],"name":"setFeeAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"asset","type":"address"},{"internalType":"uint256","name":"maxWithdraw","type":"uint256"}],"name":"setMaxWithdrawPerUser","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"asset","type":"address"},{"internalType":"uint32","name":"withdrawDelay","type":"uint32"},{"internalType":"uint16","name":"withdrawFee","type":"uint16"},{"internalType":"uint16","name":"maxLoss","type":"uint16"},{"internalType":"uint256","name":"maxWithdrawPerUser","type":"uint256"}],"name":"setupWithdrawAsset","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"asset","type":"address"}],"name":"stopWithdrawalsInAsset","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"asset","type":"address"}],"name":"transferDustToStrategy","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"asset","type":"address"}],"name":"viewOutstandingDebt","outputs":[{"internalType":"uint256","name":"debt","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract ERC20[]","name":"assets","type":"address[]"}],"name":"viewOutstandingDebts","outputs":[{"internalType":"uint256[]","name":"debts","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract ERC20","name":"","type":"address"}],"name":"withdrawAssets","outputs":[{"internalType":"bool","name":"allowWithdraws","type":"bool"},{"internalType":"uint32","name":"withdrawDelay","type":"uint32"},{"internalType":"uint128","name":"outstandingShares","type":"uint128"},{"internalType":"uint16","name":"withdrawFee","type":"uint16"},{"internalType":"uint16","name":"maxLoss","type":"uint16"},{"internalType":"uint256","name":"maxWithdrawPerUser","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000af994551f4f940224825f54f810ed5439651e5f9000000000000000000000000358d94b5b2f147d741088803d932acb566acb7b600000000000000000000000020fdf47509c5efc0e1101e3ce443691781c17f90
-----Decoded View---------------
Arg [0] : _owner (address): 0xaf994551f4f940224825F54F810ed5439651E5f9
Arg [1] : _lrtVault (address): 0x358d94b5b2F147D741088803d932Acb566acB7B6
Arg [2] : _feeAddress (address): 0x20fDF47509C5eFC0e1101e3CE443691781C17F90
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000af994551f4f940224825f54f810ed5439651e5f9
Arg [1] : 000000000000000000000000358d94b5b2f147d741088803d932acb566acb7b6
Arg [2] : 00000000000000000000000020fdf47509c5efc0e1101e3ce443691781c17f90
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | 100.00% | $0.031335 | 13,978,532.2277 | $438,012.69 |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.