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Latest 25 internal transactions (View All)
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Contract Name:
RelayFacet
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 1000000 runs
Other Settings:
london EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.17; import { ILiFi } from "../Interfaces/ILiFi.sol"; import { LibAsset } from "../Libraries/LibAsset.sol"; import { LibSwap } from "../Libraries/LibSwap.sol"; import { LibUtil } from "../Libraries/LibUtil.sol"; import { ReentrancyGuard } from "../Helpers/ReentrancyGuard.sol"; import { SwapperV2 } from "../Helpers/SwapperV2.sol"; import { Validatable } from "../Helpers/Validatable.sol"; import { ECDSA } from "solady/utils/ECDSA.sol"; /// @title Relay Facet /// @author LI.FI (https://li.fi) /// @notice Provides functionality for bridging through Relay Protocol /// @custom:version 1.0.0 contract RelayFacet is ILiFi, ReentrancyGuard, SwapperV2, Validatable { // Receiver for native transfers address public immutable relayReceiver; // Relayer wallet for ERC20 transfers address public immutable relaySolver; /// Storage /// mapping(bytes32 => bool) public consumedIds; /// Types /// /// @dev Relay specific parameters /// @param requestId Relay API request ID /// @param nonEVMReceiver set only if bridging to non-EVM chain /// @params receivingAssetId address of receiving asset /// @params signature attestation signature provided by the Relay solver struct RelayData { bytes32 requestId; bytes32 nonEVMReceiver; bytes32 receivingAssetId; bytes signature; } /// Events /// event BridgeToNonEVMChain( bytes32 indexed transactionId, uint256 indexed destinationChainId, bytes32 receiver ); /// Errors /// error InvalidQuote(); /// Modifiers /// /// @param _bridgeData The core information needed for bridging /// @param _relayData Data specific to Relay modifier onlyValidQuote( ILiFi.BridgeData memory _bridgeData, RelayData calldata _relayData ) { // Ensure that the id isn't already consumed if (consumedIds[_relayData.requestId]) { revert InvalidQuote(); } // Ensure nonEVMAddress is not empty if ( _bridgeData.receiver == LibAsset.NON_EVM_ADDRESS && _relayData.nonEVMReceiver == bytes32(0) ) { revert InvalidQuote(); } // Verify that the bridging quote has been signed by the Relay solver // as attested using the attestation API // API URL: https://api.relay.link/requests/{requestId}/signature/v2 bytes32 message = ECDSA.toEthSignedMessageHash( keccak256( abi.encodePacked( _relayData.requestId, block.chainid, bytes32(uint256(uint160(address(this)))), bytes32(uint256(uint160(_bridgeData.sendingAssetId))), _getMappedChainId(_bridgeData.destinationChainId), _bridgeData.receiver == LibAsset.NON_EVM_ADDRESS ? _relayData.nonEVMReceiver : bytes32(uint256(uint160(_bridgeData.receiver))), _relayData.receivingAssetId ) ) ); address signer = ECDSA.recover(message, _relayData.signature); if (signer != relaySolver) { revert InvalidQuote(); } _; } /// Constructor /// /// @param _relayReceiver The receiver for native transfers /// @param _relaySolver The relayer wallet for ERC20 transfers constructor(address _relayReceiver, address _relaySolver) { relayReceiver = _relayReceiver; relaySolver = _relaySolver; } /// External Methods /// /// @notice Bridges tokens via Relay /// @param _bridgeData The core information needed for bridging /// @param _relayData Data specific to Relay function startBridgeTokensViaRelay( ILiFi.BridgeData calldata _bridgeData, RelayData calldata _relayData ) external payable nonReentrant onlyValidQuote(_bridgeData, _relayData) refundExcessNative(payable(msg.sender)) validateBridgeData(_bridgeData) doesNotContainSourceSwaps(_bridgeData) doesNotContainDestinationCalls(_bridgeData) { LibAsset.depositAsset( _bridgeData.sendingAssetId, _bridgeData.minAmount ); _startBridge(_bridgeData, _relayData); } /// @notice Performs a swap before bridging via Relay /// @param _bridgeData The core information needed for bridging /// @param _swapData An array of swap related data for performing swaps before bridging /// @param _relayData Data specific to Relay function swapAndStartBridgeTokensViaRelay( ILiFi.BridgeData memory _bridgeData, LibSwap.SwapData[] calldata _swapData, RelayData calldata _relayData ) external payable nonReentrant onlyValidQuote(_bridgeData, _relayData) refundExcessNative(payable(msg.sender)) containsSourceSwaps(_bridgeData) doesNotContainDestinationCalls(_bridgeData) validateBridgeData(_bridgeData) { _bridgeData.minAmount = _depositAndSwap( _bridgeData.transactionId, _bridgeData.minAmount, _swapData, payable(msg.sender) ); _startBridge(_bridgeData, _relayData); } /// Internal Methods /// /// @dev Contains the business logic for the bridge via Relay /// @param _bridgeData The core information needed for bridging /// @param _relayData Data specific to Relay function _startBridge( ILiFi.BridgeData memory _bridgeData, RelayData calldata _relayData ) internal { // check if sendingAsset is native or ERC20 if (LibAsset.isNativeAsset(_bridgeData.sendingAssetId)) { // Native // Send Native to relayReceiver along with requestId as extra data (bool success, bytes memory reason) = relayReceiver.call{ value: _bridgeData.minAmount }(abi.encode(_relayData.requestId)); if (!success) { revert(LibUtil.getRevertMsg(reason)); } } else { // ERC20 // We build the calldata from scratch to ensure that we can only // send to the solver address bytes memory transferCallData = bytes.concat( abi.encodeWithSignature( "transfer(address,uint256)", relaySolver, _bridgeData.minAmount ), abi.encode(_relayData.requestId) ); (bool success, bytes memory reason) = address( _bridgeData.sendingAssetId ).call(transferCallData); if (!success) { revert(LibUtil.getRevertMsg(reason)); } } consumedIds[_relayData.requestId] = true; // Emit special event if bridging to non-EVM chain if (_bridgeData.receiver == LibAsset.NON_EVM_ADDRESS) { emit BridgeToNonEVMChain( _bridgeData.transactionId, _getMappedChainId(_bridgeData.destinationChainId), _relayData.nonEVMReceiver ); } emit LiFiTransferStarted(_bridgeData); } /// @notice get Relay specific chain id for non-EVM chains /// IDs found here https://li.quest/v1/chains?chainTypes=UTXO,SVM /// @param chainId LIFI specific chain id function _getMappedChainId( uint256 chainId ) internal pure returns (uint256) { // Bitcoin if (chainId == 20000000000001) { return 8253038; } // Solana if (chainId == 1151111081099710) { return 792703809; } return chainId; } }
// SPDX-License-Identifier: MIT /// @custom:version 1.0.0 pragma solidity ^0.8.17; interface ILiFi { /// Structs /// struct BridgeData { bytes32 transactionId; string bridge; string integrator; address referrer; address sendingAssetId; address receiver; uint256 minAmount; uint256 destinationChainId; bool hasSourceSwaps; bool hasDestinationCall; } /// Events /// event LiFiTransferStarted(ILiFi.BridgeData bridgeData); event LiFiTransferCompleted( bytes32 indexed transactionId, address receivingAssetId, address receiver, uint256 amount, uint256 timestamp ); event LiFiTransferRecovered( bytes32 indexed transactionId, address receivingAssetId, address receiver, uint256 amount, uint256 timestamp ); event LiFiGenericSwapCompleted( bytes32 indexed transactionId, string integrator, string referrer, address receiver, address fromAssetId, address toAssetId, uint256 fromAmount, uint256 toAmount ); // Deprecated but kept here to include in ABI to parse historic events event LiFiSwappedGeneric( bytes32 indexed transactionId, string integrator, string referrer, address fromAssetId, address toAssetId, uint256 fromAmount, uint256 toAmount ); }
// SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.17; import { InsufficientBalance, NullAddrIsNotAnERC20Token, NullAddrIsNotAValidSpender, NoTransferToNullAddress, InvalidAmount, NativeAssetTransferFailed } from "../Errors/GenericErrors.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import { LibSwap } from "./LibSwap.sol"; /// @title LibAsset /// @custom:version 1.0.1 /// @notice This library contains helpers for dealing with onchain transfers /// of assets, including accounting for the native asset `assetId` /// conventions and any noncompliant ERC20 transfers library LibAsset { uint256 private constant MAX_UINT = type(uint256).max; address internal constant NULL_ADDRESS = address(0); address internal constant NON_EVM_ADDRESS = 0x11f111f111f111F111f111f111F111f111f111F1; /// @dev All native assets use the empty address for their asset id /// by convention address internal constant NATIVE_ASSETID = NULL_ADDRESS; //address(0) /// @notice Gets the balance of the inheriting contract for the given asset /// @param assetId The asset identifier to get the balance of /// @return Balance held by contracts using this library function getOwnBalance(address assetId) internal view returns (uint256) { return isNativeAsset(assetId) ? address(this).balance : IERC20(assetId).balanceOf(address(this)); } /// @notice Transfers ether from the inheriting contract to a given /// recipient /// @param recipient Address to send ether to /// @param amount Amount to send to given recipient function transferNativeAsset( address payable recipient, uint256 amount ) private { if (recipient == NULL_ADDRESS) revert NoTransferToNullAddress(); if (amount > address(this).balance) revert InsufficientBalance(amount, address(this).balance); // solhint-disable-next-line avoid-low-level-calls (bool success, ) = recipient.call{ value: amount }(""); if (!success) revert NativeAssetTransferFailed(); } /// @notice If the current allowance is insufficient, the allowance for a given spender /// is set to MAX_UINT. /// @param assetId Token address to transfer /// @param spender Address to give spend approval to /// @param amount Amount to approve for spending function maxApproveERC20( IERC20 assetId, address spender, uint256 amount ) internal { if (isNativeAsset(address(assetId))) { return; } if (spender == NULL_ADDRESS) { revert NullAddrIsNotAValidSpender(); } if (assetId.allowance(address(this), spender) < amount) { SafeERC20.safeApprove(IERC20(assetId), spender, 0); SafeERC20.safeApprove(IERC20(assetId), spender, MAX_UINT); } } /// @notice Transfers tokens from the inheriting contract to a given /// recipient /// @param assetId Token address to transfer /// @param recipient Address to send token to /// @param amount Amount to send to given recipient function transferERC20( address assetId, address recipient, uint256 amount ) private { if (isNativeAsset(assetId)) { revert NullAddrIsNotAnERC20Token(); } if (recipient == NULL_ADDRESS) { revert NoTransferToNullAddress(); } uint256 assetBalance = IERC20(assetId).balanceOf(address(this)); if (amount > assetBalance) { revert InsufficientBalance(amount, assetBalance); } SafeERC20.safeTransfer(IERC20(assetId), recipient, amount); } /// @notice Transfers tokens from a sender to a given recipient /// @param assetId Token address to transfer /// @param from Address of sender/owner /// @param to Address of recipient/spender /// @param amount Amount to transfer from owner to spender function transferFromERC20( address assetId, address from, address to, uint256 amount ) internal { if (isNativeAsset(assetId)) { revert NullAddrIsNotAnERC20Token(); } if (to == NULL_ADDRESS) { revert NoTransferToNullAddress(); } IERC20 asset = IERC20(assetId); uint256 prevBalance = asset.balanceOf(to); SafeERC20.safeTransferFrom(asset, from, to, amount); if (asset.balanceOf(to) - prevBalance != amount) { revert InvalidAmount(); } } function depositAsset(address assetId, uint256 amount) internal { if (amount == 0) revert InvalidAmount(); if (isNativeAsset(assetId)) { if (msg.value < amount) revert InvalidAmount(); } else { uint256 balance = IERC20(assetId).balanceOf(msg.sender); if (balance < amount) revert InsufficientBalance(amount, balance); transferFromERC20(assetId, msg.sender, address(this), amount); } } function depositAssets(LibSwap.SwapData[] calldata swaps) internal { for (uint256 i = 0; i < swaps.length; ) { LibSwap.SwapData calldata swap = swaps[i]; if (swap.requiresDeposit) { depositAsset(swap.sendingAssetId, swap.fromAmount); } unchecked { i++; } } } /// @notice Determines whether the given assetId is the native asset /// @param assetId The asset identifier to evaluate /// @return Boolean indicating if the asset is the native asset function isNativeAsset(address assetId) internal pure returns (bool) { return assetId == NATIVE_ASSETID; } /// @notice Wrapper function to transfer a given asset (native or erc20) to /// some recipient. Should handle all non-compliant return value /// tokens as well by using the SafeERC20 contract by open zeppelin. /// @param assetId Asset id for transfer (address(0) for native asset, /// token address for erc20s) /// @param recipient Address to send asset to /// @param amount Amount to send to given recipient function transferAsset( address assetId, address payable recipient, uint256 amount ) internal { isNativeAsset(assetId) ? transferNativeAsset(recipient, amount) : transferERC20(assetId, recipient, amount); } /// @dev Checks whether the given address is a contract and contains code function isContract(address _contractAddr) internal view returns (bool) { uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(_contractAddr) } return size > 0; } }
// SPDX-License-Identifier: MIT /// @custom:version 1.0.0 pragma solidity ^0.8.17; import { LibAsset } from "./LibAsset.sol"; import { LibUtil } from "./LibUtil.sol"; import { InvalidContract, NoSwapFromZeroBalance, InsufficientBalance } from "../Errors/GenericErrors.sol"; import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; library LibSwap { struct SwapData { address callTo; address approveTo; address sendingAssetId; address receivingAssetId; uint256 fromAmount; bytes callData; bool requiresDeposit; } event AssetSwapped( bytes32 transactionId, address dex, address fromAssetId, address toAssetId, uint256 fromAmount, uint256 toAmount, uint256 timestamp ); function swap(bytes32 transactionId, SwapData calldata _swap) internal { if (!LibAsset.isContract(_swap.callTo)) revert InvalidContract(); uint256 fromAmount = _swap.fromAmount; if (fromAmount == 0) revert NoSwapFromZeroBalance(); uint256 nativeValue = LibAsset.isNativeAsset(_swap.sendingAssetId) ? _swap.fromAmount : 0; uint256 initialSendingAssetBalance = LibAsset.getOwnBalance( _swap.sendingAssetId ); uint256 initialReceivingAssetBalance = LibAsset.getOwnBalance( _swap.receivingAssetId ); if (nativeValue == 0) { LibAsset.maxApproveERC20( IERC20(_swap.sendingAssetId), _swap.approveTo, _swap.fromAmount ); } if (initialSendingAssetBalance < _swap.fromAmount) { revert InsufficientBalance( _swap.fromAmount, initialSendingAssetBalance ); } // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory res) = _swap.callTo.call{ value: nativeValue }(_swap.callData); if (!success) { LibUtil.revertWith(res); } uint256 newBalance = LibAsset.getOwnBalance(_swap.receivingAssetId); emit AssetSwapped( transactionId, _swap.callTo, _swap.sendingAssetId, _swap.receivingAssetId, _swap.fromAmount, newBalance > initialReceivingAssetBalance ? newBalance - initialReceivingAssetBalance : newBalance, block.timestamp ); } }
// SPDX-License-Identifier: MIT /// @custom:version 1.0.0 pragma solidity ^0.8.17; import "./LibBytes.sol"; library LibUtil { using LibBytes for bytes; function getRevertMsg( bytes memory _res ) internal pure returns (string memory) { // If the _res length is less than 68, then the transaction failed silently (without a revert message) if (_res.length < 68) return "Transaction reverted silently"; bytes memory revertData = _res.slice(4, _res.length - 4); // Remove the selector which is the first 4 bytes return abi.decode(revertData, (string)); // All that remains is the revert string } /// @notice Determines whether the given address is the zero address /// @param addr The address to verify /// @return Boolean indicating if the address is the zero address function isZeroAddress(address addr) internal pure returns (bool) { return addr == address(0); } function revertWith(bytes memory data) internal pure { assembly { let dataSize := mload(data) // Load the size of the data let dataPtr := add(data, 0x20) // Advance data pointer to the next word revert(dataPtr, dataSize) // Revert with the given data } } }
// SPDX-License-Identifier: UNLICENSED /// @custom:version 1.0.0 pragma solidity ^0.8.17; /// @title Reentrancy Guard /// @author LI.FI (https://li.fi) /// @notice Abstract contract to provide protection against reentrancy abstract contract ReentrancyGuard { /// Storage /// bytes32 private constant NAMESPACE = keccak256("com.lifi.reentrancyguard"); /// Types /// struct ReentrancyStorage { uint256 status; } /// Errors /// error ReentrancyError(); /// Constants /// uint256 private constant _NOT_ENTERED = 0; uint256 private constant _ENTERED = 1; /// Modifiers /// modifier nonReentrant() { ReentrancyStorage storage s = reentrancyStorage(); if (s.status == _ENTERED) revert ReentrancyError(); s.status = _ENTERED; _; s.status = _NOT_ENTERED; } /// Private Methods /// /// @dev fetch local storage function reentrancyStorage() private pure returns (ReentrancyStorage storage data) { bytes32 position = NAMESPACE; // solhint-disable-next-line no-inline-assembly assembly { data.slot := position } } }
// SPDX-License-Identifier: MIT /// @custom:version 1.0.0 pragma solidity ^0.8.17; import { ILiFi } from "../Interfaces/ILiFi.sol"; import { LibSwap } from "../Libraries/LibSwap.sol"; import { LibAsset } from "../Libraries/LibAsset.sol"; import { LibAllowList } from "../Libraries/LibAllowList.sol"; import { ContractCallNotAllowed, NoSwapDataProvided, CumulativeSlippageTooHigh } from "../Errors/GenericErrors.sol"; /// @title Swapper /// @author LI.FI (https://li.fi) /// @notice Abstract contract to provide swap functionality contract SwapperV2 is ILiFi { /// Types /// /// @dev only used to get around "Stack Too Deep" errors struct ReserveData { bytes32 transactionId; address payable leftoverReceiver; uint256 nativeReserve; } /// Modifiers /// /// @dev Sends any leftover balances back to the user /// @notice Sends any leftover balances to the user /// @param _swaps Swap data array /// @param _leftoverReceiver Address to send leftover tokens to /// @param _initialBalances Array of initial token balances modifier noLeftovers( LibSwap.SwapData[] calldata _swaps, address payable _leftoverReceiver, uint256[] memory _initialBalances ) { uint256 numSwaps = _swaps.length; if (numSwaps != 1) { address finalAsset = _swaps[numSwaps - 1].receivingAssetId; uint256 curBalance; _; for (uint256 i = 0; i < numSwaps - 1; ) { address curAsset = _swaps[i].receivingAssetId; // Handle multi-to-one swaps if (curAsset != finalAsset) { curBalance = LibAsset.getOwnBalance(curAsset) - _initialBalances[i]; if (curBalance > 0) { LibAsset.transferAsset( curAsset, _leftoverReceiver, curBalance ); } } unchecked { ++i; } } } else { _; } } /// @dev Sends any leftover balances back to the user reserving native tokens /// @notice Sends any leftover balances to the user /// @param _swaps Swap data array /// @param _leftoverReceiver Address to send leftover tokens to /// @param _initialBalances Array of initial token balances modifier noLeftoversReserve( LibSwap.SwapData[] calldata _swaps, address payable _leftoverReceiver, uint256[] memory _initialBalances, uint256 _nativeReserve ) { uint256 numSwaps = _swaps.length; if (numSwaps != 1) { address finalAsset = _swaps[numSwaps - 1].receivingAssetId; uint256 curBalance; _; for (uint256 i = 0; i < numSwaps - 1; ) { address curAsset = _swaps[i].receivingAssetId; // Handle multi-to-one swaps if (curAsset != finalAsset) { curBalance = LibAsset.getOwnBalance(curAsset) - _initialBalances[i]; uint256 reserve = LibAsset.isNativeAsset(curAsset) ? _nativeReserve : 0; if (curBalance > 0) { LibAsset.transferAsset( curAsset, _leftoverReceiver, curBalance - reserve ); } } unchecked { ++i; } } } else { _; } } /// @dev Refunds any excess native asset sent to the contract after the main function /// @notice Refunds any excess native asset sent to the contract after the main function /// @param _refundReceiver Address to send refunds to modifier refundExcessNative(address payable _refundReceiver) { uint256 initialBalance = address(this).balance - msg.value; _; uint256 finalBalance = address(this).balance; if (finalBalance > initialBalance) { LibAsset.transferAsset( LibAsset.NATIVE_ASSETID, _refundReceiver, finalBalance - initialBalance ); } } /// Internal Methods /// /// @dev Deposits value, executes swaps, and performs minimum amount check /// @param _transactionId the transaction id associated with the operation /// @param _minAmount the minimum amount of the final asset to receive /// @param _swaps Array of data used to execute swaps /// @param _leftoverReceiver The address to send leftover funds to /// @return uint256 result of the swap function _depositAndSwap( bytes32 _transactionId, uint256 _minAmount, LibSwap.SwapData[] calldata _swaps, address payable _leftoverReceiver ) internal returns (uint256) { uint256 numSwaps = _swaps.length; if (numSwaps == 0) { revert NoSwapDataProvided(); } address finalTokenId = _swaps[numSwaps - 1].receivingAssetId; uint256 initialBalance = LibAsset.getOwnBalance(finalTokenId); if (LibAsset.isNativeAsset(finalTokenId)) { initialBalance -= msg.value; } uint256[] memory initialBalances = _fetchBalances(_swaps); LibAsset.depositAssets(_swaps); _executeSwaps( _transactionId, _swaps, _leftoverReceiver, initialBalances ); uint256 newBalance = LibAsset.getOwnBalance(finalTokenId) - initialBalance; if (newBalance < _minAmount) { revert CumulativeSlippageTooHigh(_minAmount, newBalance); } return newBalance; } /// @dev Deposits value, executes swaps, and performs minimum amount check and reserves native token for fees /// @param _transactionId the transaction id associated with the operation /// @param _minAmount the minimum amount of the final asset to receive /// @param _swaps Array of data used to execute swaps /// @param _leftoverReceiver The address to send leftover funds to /// @param _nativeReserve Amount of native token to prevent from being swept back to the caller function _depositAndSwap( bytes32 _transactionId, uint256 _minAmount, LibSwap.SwapData[] calldata _swaps, address payable _leftoverReceiver, uint256 _nativeReserve ) internal returns (uint256) { uint256 numSwaps = _swaps.length; if (numSwaps == 0) { revert NoSwapDataProvided(); } address finalTokenId = _swaps[numSwaps - 1].receivingAssetId; uint256 initialBalance = LibAsset.getOwnBalance(finalTokenId); if (LibAsset.isNativeAsset(finalTokenId)) { initialBalance -= msg.value; } uint256[] memory initialBalances = _fetchBalances(_swaps); LibAsset.depositAssets(_swaps); ReserveData memory rd = ReserveData( _transactionId, _leftoverReceiver, _nativeReserve ); _executeSwaps(rd, _swaps, initialBalances); uint256 newBalance = LibAsset.getOwnBalance(finalTokenId) - initialBalance; if (LibAsset.isNativeAsset(finalTokenId)) { newBalance -= _nativeReserve; } if (newBalance < _minAmount) { revert CumulativeSlippageTooHigh(_minAmount, newBalance); } return newBalance; } /// Private Methods /// /// @dev Executes swaps and checks that DEXs used are in the allowList /// @param _transactionId the transaction id associated with the operation /// @param _swaps Array of data used to execute swaps /// @param _leftoverReceiver Address to send leftover tokens to /// @param _initialBalances Array of initial balances function _executeSwaps( bytes32 _transactionId, LibSwap.SwapData[] calldata _swaps, address payable _leftoverReceiver, uint256[] memory _initialBalances ) internal noLeftovers(_swaps, _leftoverReceiver, _initialBalances) { uint256 numSwaps = _swaps.length; for (uint256 i = 0; i < numSwaps; ) { LibSwap.SwapData calldata currentSwap = _swaps[i]; if ( !((LibAsset.isNativeAsset(currentSwap.sendingAssetId) || LibAllowList.contractIsAllowed(currentSwap.approveTo)) && LibAllowList.contractIsAllowed(currentSwap.callTo) && LibAllowList.selectorIsAllowed( bytes4(currentSwap.callData[:4]) )) ) revert ContractCallNotAllowed(); LibSwap.swap(_transactionId, currentSwap); unchecked { ++i; } } } /// @dev Executes swaps and checks that DEXs used are in the allowList /// @param _reserveData Data passed used to reserve native tokens /// @param _swaps Array of data used to execute swaps function _executeSwaps( ReserveData memory _reserveData, LibSwap.SwapData[] calldata _swaps, uint256[] memory _initialBalances ) internal noLeftoversReserve( _swaps, _reserveData.leftoverReceiver, _initialBalances, _reserveData.nativeReserve ) { uint256 numSwaps = _swaps.length; for (uint256 i = 0; i < numSwaps; ) { LibSwap.SwapData calldata currentSwap = _swaps[i]; if ( !((LibAsset.isNativeAsset(currentSwap.sendingAssetId) || LibAllowList.contractIsAllowed(currentSwap.approveTo)) && LibAllowList.contractIsAllowed(currentSwap.callTo) && LibAllowList.selectorIsAllowed( bytes4(currentSwap.callData[:4]) )) ) revert ContractCallNotAllowed(); LibSwap.swap(_reserveData.transactionId, currentSwap); unchecked { ++i; } } } /// @dev Fetches balances of tokens to be swapped before swapping. /// @param _swaps Array of data used to execute swaps /// @return uint256[] Array of token balances. function _fetchBalances( LibSwap.SwapData[] calldata _swaps ) private view returns (uint256[] memory) { uint256 numSwaps = _swaps.length; uint256[] memory balances = new uint256[](numSwaps); address asset; for (uint256 i = 0; i < numSwaps; ) { asset = _swaps[i].receivingAssetId; balances[i] = LibAsset.getOwnBalance(asset); if (LibAsset.isNativeAsset(asset)) { balances[i] -= msg.value; } unchecked { ++i; } } return balances; } }
// SPDX-License-Identifier: UNLICENSED /// @custom:version 1.0.0 pragma solidity ^0.8.17; import { LibAsset } from "../Libraries/LibAsset.sol"; import { LibUtil } from "../Libraries/LibUtil.sol"; import { InvalidReceiver, InformationMismatch, InvalidSendingToken, InvalidAmount, NativeAssetNotSupported, InvalidDestinationChain, CannotBridgeToSameNetwork } from "../Errors/GenericErrors.sol"; import { ILiFi } from "../Interfaces/ILiFi.sol"; import { LibSwap } from "../Libraries/LibSwap.sol"; contract Validatable { modifier validateBridgeData(ILiFi.BridgeData memory _bridgeData) { if (LibUtil.isZeroAddress(_bridgeData.receiver)) { revert InvalidReceiver(); } if (_bridgeData.minAmount == 0) { revert InvalidAmount(); } if (_bridgeData.destinationChainId == block.chainid) { revert CannotBridgeToSameNetwork(); } _; } modifier noNativeAsset(ILiFi.BridgeData memory _bridgeData) { if (LibAsset.isNativeAsset(_bridgeData.sendingAssetId)) { revert NativeAssetNotSupported(); } _; } modifier onlyAllowSourceToken( ILiFi.BridgeData memory _bridgeData, address _token ) { if (_bridgeData.sendingAssetId != _token) { revert InvalidSendingToken(); } _; } modifier onlyAllowDestinationChain( ILiFi.BridgeData memory _bridgeData, uint256 _chainId ) { if (_bridgeData.destinationChainId != _chainId) { revert InvalidDestinationChain(); } _; } modifier containsSourceSwaps(ILiFi.BridgeData memory _bridgeData) { if (!_bridgeData.hasSourceSwaps) { revert InformationMismatch(); } _; } modifier doesNotContainSourceSwaps(ILiFi.BridgeData memory _bridgeData) { if (_bridgeData.hasSourceSwaps) { revert InformationMismatch(); } _; } modifier doesNotContainDestinationCalls( ILiFi.BridgeData memory _bridgeData ) { if (_bridgeData.hasDestinationCall) { revert InformationMismatch(); } _; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice Gas optimized ECDSA wrapper. /// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/ECDSA.sol) /// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/ECDSA.sol) /// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/ECDSA.sol) /// /// @dev Note: /// - The recovery functions use the ecrecover precompile (0x1). /// - As of Solady version 0.0.68, the `recover` variants will revert upon recovery failure. /// This is for more safety by default. /// Use the `tryRecover` variants if you need to get the zero address back /// upon recovery failure instead. /// - As of Solady version 0.0.134, all `bytes signature` variants accept both /// regular 65-byte `(r, s, v)` and EIP-2098 `(r, vs)` short form signatures. /// See: https://eips.ethereum.org/EIPS/eip-2098 /// This is for calldata efficiency on smart accounts prevalent on L2s. /// /// WARNING! Do NOT use signatures as unique identifiers: /// - Use a nonce in the digest to prevent replay attacks on the same contract. /// - Use EIP-712 for the digest to prevent replay attacks across different chains and contracts. /// EIP-712 also enables readable signing of typed data for better user safety. /// This implementation does NOT check if a signature is non-malleable. library ECDSA { /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CUSTOM ERRORS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The signature is invalid. error InvalidSignature(); /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* RECOVERY OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`. function recover(bytes32 hash, bytes memory signature) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { result := 1 let m := mload(0x40) // Cache the free memory pointer. for {} 1 {} { mstore(0x00, hash) mstore(0x40, mload(add(signature, 0x20))) // `r`. if eq(mload(signature), 64) { let vs := mload(add(signature, 0x40)) mstore(0x20, add(shr(255, vs), 27)) // `v`. mstore(0x60, shr(1, shl(1, vs))) // `s`. break } if eq(mload(signature), 65) { mstore(0x20, byte(0, mload(add(signature, 0x60)))) // `v`. mstore(0x60, mload(add(signature, 0x40))) // `s`. break } result := 0 break } result := mload( staticcall( gas(), // Amount of gas left for the transaction. result, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x01, // Start of output. 0x20 // Size of output. ) ) // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. if iszero(returndatasize()) { mstore(0x00, 0x8baa579f) // `InvalidSignature()`. revert(0x1c, 0x04) } mstore(0x60, 0) // Restore the zero slot. mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`. function recoverCalldata(bytes32 hash, bytes calldata signature) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { result := 1 let m := mload(0x40) // Cache the free memory pointer. mstore(0x00, hash) for {} 1 {} { if eq(signature.length, 64) { let vs := calldataload(add(signature.offset, 0x20)) mstore(0x20, add(shr(255, vs), 27)) // `v`. mstore(0x40, calldataload(signature.offset)) // `r`. mstore(0x60, shr(1, shl(1, vs))) // `s`. break } if eq(signature.length, 65) { mstore(0x20, byte(0, calldataload(add(signature.offset, 0x40)))) // `v`. calldatacopy(0x40, signature.offset, 0x40) // Copy `r` and `s`. break } result := 0 break } result := mload( staticcall( gas(), // Amount of gas left for the transaction. result, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x01, // Start of output. 0x20 // Size of output. ) ) // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. if iszero(returndatasize()) { mstore(0x00, 0x8baa579f) // `InvalidSignature()`. revert(0x1c, 0x04) } mstore(0x60, 0) // Restore the zero slot. mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Recovers the signer's address from a message digest `hash`, /// and the EIP-2098 short form signature defined by `r` and `vs`. function recover(bytes32 hash, bytes32 r, bytes32 vs) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { let m := mload(0x40) // Cache the free memory pointer. mstore(0x00, hash) mstore(0x20, add(shr(255, vs), 27)) // `v`. mstore(0x40, r) mstore(0x60, shr(1, shl(1, vs))) // `s`. result := mload( staticcall( gas(), // Amount of gas left for the transaction. 1, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x01, // Start of output. 0x20 // Size of output. ) ) // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. if iszero(returndatasize()) { mstore(0x00, 0x8baa579f) // `InvalidSignature()`. revert(0x1c, 0x04) } mstore(0x60, 0) // Restore the zero slot. mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Recovers the signer's address from a message digest `hash`, /// and the signature defined by `v`, `r`, `s`. function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { let m := mload(0x40) // Cache the free memory pointer. mstore(0x00, hash) mstore(0x20, and(v, 0xff)) mstore(0x40, r) mstore(0x60, s) result := mload( staticcall( gas(), // Amount of gas left for the transaction. 1, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x01, // Start of output. 0x20 // Size of output. ) ) // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. if iszero(returndatasize()) { mstore(0x00, 0x8baa579f) // `InvalidSignature()`. revert(0x1c, 0x04) } mstore(0x60, 0) // Restore the zero slot. mstore(0x40, m) // Restore the free memory pointer. } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* TRY-RECOVER OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ // WARNING! // These functions will NOT revert upon recovery failure. // Instead, they will return the zero address upon recovery failure. // It is critical that the returned address is NEVER compared against // a zero address (e.g. an uninitialized address variable). /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`. function tryRecover(bytes32 hash, bytes memory signature) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { result := 1 let m := mload(0x40) // Cache the free memory pointer. for {} 1 {} { mstore(0x00, hash) mstore(0x40, mload(add(signature, 0x20))) // `r`. if eq(mload(signature), 64) { let vs := mload(add(signature, 0x40)) mstore(0x20, add(shr(255, vs), 27)) // `v`. mstore(0x60, shr(1, shl(1, vs))) // `s`. break } if eq(mload(signature), 65) { mstore(0x20, byte(0, mload(add(signature, 0x60)))) // `v`. mstore(0x60, mload(add(signature, 0x40))) // `s`. break } result := 0 break } pop( staticcall( gas(), // Amount of gas left for the transaction. result, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x40, // Start of output. 0x20 // Size of output. ) ) mstore(0x60, 0) // Restore the zero slot. // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. result := mload(xor(0x60, returndatasize())) mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Recovers the signer's address from a message digest `hash`, and the `signature`. function tryRecoverCalldata(bytes32 hash, bytes calldata signature) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { result := 1 let m := mload(0x40) // Cache the free memory pointer. mstore(0x00, hash) for {} 1 {} { if eq(signature.length, 64) { let vs := calldataload(add(signature.offset, 0x20)) mstore(0x20, add(shr(255, vs), 27)) // `v`. mstore(0x40, calldataload(signature.offset)) // `r`. mstore(0x60, shr(1, shl(1, vs))) // `s`. break } if eq(signature.length, 65) { mstore(0x20, byte(0, calldataload(add(signature.offset, 0x40)))) // `v`. calldatacopy(0x40, signature.offset, 0x40) // Copy `r` and `s`. break } result := 0 break } pop( staticcall( gas(), // Amount of gas left for the transaction. result, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x40, // Start of output. 0x20 // Size of output. ) ) mstore(0x60, 0) // Restore the zero slot. // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. result := mload(xor(0x60, returndatasize())) mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Recovers the signer's address from a message digest `hash`, /// and the EIP-2098 short form signature defined by `r` and `vs`. function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { let m := mload(0x40) // Cache the free memory pointer. mstore(0x00, hash) mstore(0x20, add(shr(255, vs), 27)) // `v`. mstore(0x40, r) mstore(0x60, shr(1, shl(1, vs))) // `s`. pop( staticcall( gas(), // Amount of gas left for the transaction. 1, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x40, // Start of output. 0x20 // Size of output. ) ) mstore(0x60, 0) // Restore the zero slot. // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. result := mload(xor(0x60, returndatasize())) mstore(0x40, m) // Restore the free memory pointer. } } /// @dev Recovers the signer's address from a message digest `hash`, /// and the signature defined by `v`, `r`, `s`. function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal view returns (address result) { /// @solidity memory-safe-assembly assembly { let m := mload(0x40) // Cache the free memory pointer. mstore(0x00, hash) mstore(0x20, and(v, 0xff)) mstore(0x40, r) mstore(0x60, s) pop( staticcall( gas(), // Amount of gas left for the transaction. 1, // Address of `ecrecover`. 0x00, // Start of input. 0x80, // Size of input. 0x40, // Start of output. 0x20 // Size of output. ) ) mstore(0x60, 0) // Restore the zero slot. // `returndatasize()` will be `0x20` upon success, and `0x00` otherwise. result := mload(xor(0x60, returndatasize())) mstore(0x40, m) // Restore the free memory pointer. } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* HASHING OPERATIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns an Ethereum Signed Message, created from a `hash`. /// This produces a hash corresponding to the one signed with the /// [`eth_sign`](https://eth.wiki/json-rpc/API#eth_sign) /// JSON-RPC method as part of EIP-191. function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { mstore(0x20, hash) // Store into scratch space for keccak256. mstore(0x00, "\x00\x00\x00\x00\x19Ethereum Signed Message:\n32") // 28 bytes. result := keccak256(0x04, 0x3c) // `32 * 2 - (32 - 28) = 60 = 0x3c`. } } /// @dev Returns an Ethereum Signed Message, created from `s`. /// This produces a hash corresponding to the one signed with the /// [`eth_sign`](https://eth.wiki/json-rpc/API#eth_sign) /// JSON-RPC method as part of EIP-191. /// Note: Supports lengths of `s` up to 999999 bytes. function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { let sLength := mload(s) let o := 0x20 mstore(o, "\x19Ethereum Signed Message:\n") // 26 bytes, zero-right-padded. mstore(0x00, 0x00) // Convert the `s.length` to ASCII decimal representation: `base10(s.length)`. for { let temp := sLength } 1 {} { o := sub(o, 1) mstore8(o, add(48, mod(temp, 10))) temp := div(temp, 10) if iszero(temp) { break } } let n := sub(0x3a, o) // Header length: `26 + 32 - o`. // Throw an out-of-offset error (consumes all gas) if the header exceeds 32 bytes. returndatacopy(returndatasize(), returndatasize(), gt(n, 0x20)) mstore(s, or(mload(0x00), mload(n))) // Temporarily store the header. result := keccak256(add(s, sub(0x20, n)), add(n, sLength)) mstore(s, sLength) // Restore the length. } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* EMPTY CALLDATA HELPERS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns an empty calldata bytes. function emptySignature() internal pure returns (bytes calldata signature) { /// @solidity memory-safe-assembly assembly { signature.length := 0 } } }
// SPDX-License-Identifier: MIT /// @custom:version 1.0.0 pragma solidity ^0.8.17; error AlreadyInitialized(); error CannotAuthoriseSelf(); error CannotBridgeToSameNetwork(); error ContractCallNotAllowed(); error CumulativeSlippageTooHigh(uint256 minAmount, uint256 receivedAmount); error DiamondIsPaused(); error ExternalCallFailed(); error FunctionDoesNotExist(); error InformationMismatch(); error InsufficientBalance(uint256 required, uint256 balance); error InvalidAmount(); error InvalidCallData(); error InvalidConfig(); error InvalidContract(); error InvalidDestinationChain(); error InvalidFallbackAddress(); error InvalidReceiver(); error InvalidSendingToken(); error NativeAssetNotSupported(); error NativeAssetTransferFailed(); error NoSwapDataProvided(); error NoSwapFromZeroBalance(); error NotAContract(); error NotInitialized(); error NoTransferToNullAddress(); error NullAddrIsNotAnERC20Token(); error NullAddrIsNotAValidSpender(); error OnlyContractOwner(); error RecoveryAddressCannotBeZero(); error ReentrancyError(); error TokenNotSupported(); error UnAuthorized(); error UnsupportedChainId(uint256 chainId); error WithdrawFailed(); error ZeroAmount();
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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. Compatible with tokens that require the approval to be set to * 0 before setting it to a non-zero value. */ 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) (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 /// @custom:version 1.0.0 pragma solidity ^0.8.17; library LibBytes { // solhint-disable no-inline-assembly // LibBytes specific errors error SliceOverflow(); error SliceOutOfBounds(); error AddressOutOfBounds(); bytes16 private constant _SYMBOLS = "0123456789abcdef"; // ------------------------- function slice( bytes memory _bytes, uint256 _start, uint256 _length ) internal pure returns (bytes memory) { if (_length + 31 < _length) revert SliceOverflow(); if (_bytes.length < _start + _length) revert SliceOutOfBounds(); bytes memory tempBytes; assembly { switch iszero(_length) case 0 { // Get a location of some free memory and store it in tempBytes as // Solidity does for memory variables. tempBytes := mload(0x40) // The first word of the slice result is potentially a partial // word read from the original array. To read it, we calculate // the length of that partial word and start copying that many // bytes into the array. The first word we copy will start with // data we don't care about, but the last `lengthmod` bytes will // land at the beginning of the contents of the new array. When // we're done copying, we overwrite the full first word with // the actual length of the slice. let lengthmod := and(_length, 31) // The multiplication in the next line is necessary // because when slicing multiples of 32 bytes (lengthmod == 0) // the following copy loop was copying the origin's length // and then ending prematurely not copying everything it should. let mc := add( add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)) ) let end := add(mc, _length) for { // The multiplication in the next line has the same exact purpose // as the one above. let cc := add( add( add(_bytes, lengthmod), mul(0x20, iszero(lengthmod)) ), _start ) } lt(mc, end) { mc := add(mc, 0x20) cc := add(cc, 0x20) } { mstore(mc, mload(cc)) } mstore(tempBytes, _length) //update free-memory pointer //allocating the array padded to 32 bytes like the compiler does now mstore(0x40, and(add(mc, 31), not(31))) } //if we want a zero-length slice let's just return a zero-length array default { tempBytes := mload(0x40) //zero out the 32 bytes slice we are about to return //we need to do it because Solidity does not garbage collect mstore(tempBytes, 0) mstore(0x40, add(tempBytes, 0x20)) } } return tempBytes; } function toAddress( bytes memory _bytes, uint256 _start ) internal pure returns (address) { if (_bytes.length < _start + 20) { revert AddressOutOfBounds(); } address tempAddress; assembly { tempAddress := div( mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000 ) } return tempAddress; } /// Copied from OpenZeppelin's `Strings.sol` utility library. /// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/8335676b0e99944eef6a742e16dcd9ff6e68e609/contracts/utils/Strings.sol function toHexString( uint256 value, uint256 length ) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT /// @custom:version 1.0.0 pragma solidity ^0.8.17; import { InvalidContract } from "../Errors/GenericErrors.sol"; /// @title Lib Allow List /// @author LI.FI (https://li.fi) /// @notice Library for managing and accessing the conract address allow list library LibAllowList { /// Storage /// bytes32 internal constant NAMESPACE = keccak256("com.lifi.library.allow.list"); struct AllowListStorage { mapping(address => bool) allowlist; mapping(bytes4 => bool) selectorAllowList; address[] contracts; } /// @dev Adds a contract address to the allow list /// @param _contract the contract address to add function addAllowedContract(address _contract) internal { _checkAddress(_contract); AllowListStorage storage als = _getStorage(); if (als.allowlist[_contract]) return; als.allowlist[_contract] = true; als.contracts.push(_contract); } /// @dev Checks whether a contract address has been added to the allow list /// @param _contract the contract address to check function contractIsAllowed( address _contract ) internal view returns (bool) { return _getStorage().allowlist[_contract]; } /// @dev Remove a contract address from the allow list /// @param _contract the contract address to remove function removeAllowedContract(address _contract) internal { AllowListStorage storage als = _getStorage(); if (!als.allowlist[_contract]) { return; } als.allowlist[_contract] = false; uint256 length = als.contracts.length; // Find the contract in the list for (uint256 i = 0; i < length; i++) { if (als.contracts[i] == _contract) { // Move the last element into the place to delete als.contracts[i] = als.contracts[length - 1]; // Remove the last element als.contracts.pop(); break; } } } /// @dev Fetch contract addresses from the allow list function getAllowedContracts() internal view returns (address[] memory) { return _getStorage().contracts; } /// @dev Add a selector to the allow list /// @param _selector the selector to add function addAllowedSelector(bytes4 _selector) internal { _getStorage().selectorAllowList[_selector] = true; } /// @dev Removes a selector from the allow list /// @param _selector the selector to remove function removeAllowedSelector(bytes4 _selector) internal { _getStorage().selectorAllowList[_selector] = false; } /// @dev Returns if selector has been added to the allow list /// @param _selector the selector to check function selectorIsAllowed(bytes4 _selector) internal view returns (bool) { return _getStorage().selectorAllowList[_selector]; } /// @dev Fetch local storage struct function _getStorage() internal pure returns (AllowListStorage storage als) { bytes32 position = NAMESPACE; // solhint-disable-next-line no-inline-assembly assembly { als.slot := position } } /// @dev Contains business logic for validating a contract address. /// @param _contract address of the dex to check function _checkAddress(address _contract) private view { if (_contract == address(0)) revert InvalidContract(); if (_contract.code.length == 0) revert InvalidContract(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (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
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RelayFacet.RelayData","name":"_relayData","type":"tuple"}],"name":"swapAndStartBridgeTokensViaRelay","outputs":[],"stateMutability":"payable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000aa467eba42a3d604b3d74d63b2b6c6cb000000000000000000000000f70da97812cb96acdf810712aa562db8dfa3dbef
-----Decoded View---------------
Arg [0] : _relayReceiver (address): 0x00000000AA467EbA42a3d604B3d74d63B2b6C6Cb
Arg [1] : _relaySolver (address): 0xf70da97812CB96acDF810712Aa562db8dfA3dbEF
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000aa467eba42a3d604b3d74d63b2b6c6cb
Arg [1] : 000000000000000000000000f70da97812cb96acdf810712aa562db8dfa3dbef
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Multichain Portfolio | 31 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.