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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

import { ILiFi } from "../Interfaces/ILiFi.sol";
import { LibUtil } from "../Libraries/LibUtil.sol";
import { LibSwap } from "../Libraries/LibSwap.sol";
import { LibAllowList } from "../Libraries/LibAllowList.sol";
import { LibAsset } from "../Libraries/LibAsset.sol";
import { ContractCallNotAllowed, CumulativeSlippageTooHigh, NativeAssetTransferFailed } from "../Errors/GenericErrors.sol";
import { ERC20, SafeTransferLib } from "solmate/utils/SafeTransferLib.sol";

/// @title GenericSwapFacetV3
/// @author LI.FI (https://li.fi)
/// @notice Provides gas-optimized functionality for fee collection and for swapping through any APPROVED DEX
/// @dev Can only execute calldata for APPROVED function selectors
/// @custom:version 1.0.1
contract GenericSwapFacetV3 is ILiFi {
    using SafeTransferLib for ERC20;

    /// Storage
    address public immutable NATIVE_ADDRESS;

    /// Constructor
    /// @param _nativeAddress the address of the native token for this network
    constructor(address _nativeAddress) {
        NATIVE_ADDRESS = _nativeAddress;
    }

    /// External Methods ///

    // SINGLE SWAPS

    /// @notice Performs a single swap from an ERC20 token to another ERC20 token
    /// @param _transactionId the transaction id associated with the operation
    /// @param _integrator the name of the integrator
    /// @param _referrer the address of the referrer
    /// @param _receiver the address to receive the swapped tokens into (also excess tokens)
    /// @param _minAmountOut the minimum amount of the final asset to receive
    /// @param _swapData an object containing swap related data to perform swaps before bridging
    function swapTokensSingleV3ERC20ToERC20(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData calldata _swapData
    ) external {
        _depositAndSwapERC20Single(_swapData, _receiver);

        address receivingAssetId = _swapData.receivingAssetId;
        address sendingAssetId = _swapData.sendingAssetId;

        // get contract's balance (which will be sent in full to user)
        uint256 amountReceived = ERC20(receivingAssetId).balanceOf(
            address(this)
        );

        // ensure that minAmountOut was received
        if (amountReceived < _minAmountOut)
            revert CumulativeSlippageTooHigh(_minAmountOut, amountReceived);

        // transfer funds to receiver
        ERC20(receivingAssetId).safeTransfer(_receiver, amountReceived);

        // emit events (both required for tracking)
        uint256 fromAmount = _swapData.fromAmount;
        emit LibSwap.AssetSwapped(
            _transactionId,
            _swapData.callTo,
            sendingAssetId,
            receivingAssetId,
            fromAmount,
            amountReceived,
            block.timestamp
        );

        emit ILiFi.LiFiGenericSwapCompleted(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            sendingAssetId,
            receivingAssetId,
            fromAmount,
            amountReceived
        );
    }

    /// @notice Performs a single swap from an ERC20 token to the network's native token
    /// @param _transactionId the transaction id associated with the operation
    /// @param _integrator the name of the integrator
    /// @param _referrer the address of the referrer
    /// @param _receiver the address to receive the swapped tokens into (also excess tokens)
    /// @param _minAmountOut the minimum amount of the final asset to receive
    /// @param _swapData an object containing swap related data to perform swaps before bridging
    function swapTokensSingleV3ERC20ToNative(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData calldata _swapData
    ) external {
        _depositAndSwapERC20Single(_swapData, _receiver);

        // get contract's balance (which will be sent in full to user)
        uint256 amountReceived = address(this).balance;

        // ensure that minAmountOut was received
        if (amountReceived < _minAmountOut)
            revert CumulativeSlippageTooHigh(_minAmountOut, amountReceived);

        // transfer funds to receiver
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = _receiver.call{ value: amountReceived }("");
        if (!success) revert NativeAssetTransferFailed();

        // emit events (both required for tracking)
        address sendingAssetId = _swapData.sendingAssetId;
        uint256 fromAmount = _swapData.fromAmount;
        emit LibSwap.AssetSwapped(
            _transactionId,
            _swapData.callTo,
            sendingAssetId,
            NATIVE_ADDRESS,
            fromAmount,
            amountReceived,
            block.timestamp
        );

        emit ILiFi.LiFiGenericSwapCompleted(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            sendingAssetId,
            NATIVE_ADDRESS,
            fromAmount,
            amountReceived
        );
    }

    /// @notice Performs a single swap from the network's native token to ERC20 token
    /// @param _transactionId the transaction id associated with the operation
    /// @param _integrator the name of the integrator
    /// @param _referrer the address of the referrer
    /// @param _receiver the address to receive the swapped tokens into (also excess tokens)
    /// @param _minAmountOut the minimum amount of the final asset to receive
    /// @param _swapData an object containing swap related data to perform swaps before bridging
    function swapTokensSingleV3NativeToERC20(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData calldata _swapData
    ) external payable {
        address callTo = _swapData.callTo;
        // ensure that contract (callTo) and function selector are whitelisted
        if (
            !(LibAllowList.contractIsAllowed(callTo) &&
                LibAllowList.selectorIsAllowed(bytes4(_swapData.callData[:4])))
        ) revert ContractCallNotAllowed();

        // execute swap
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory res) = callTo.call{ value: msg.value }(
            _swapData.callData
        );
        if (!success) {
            LibUtil.revertWith(res);
        }

        _returnPositiveSlippageNative(_receiver);

        // get contract's balance (which will be sent in full to user)
        address receivingAssetId = _swapData.receivingAssetId;
        uint256 amountReceived = ERC20(receivingAssetId).balanceOf(
            address(this)
        );

        // ensure that minAmountOut was received
        if (amountReceived < _minAmountOut)
            revert CumulativeSlippageTooHigh(_minAmountOut, amountReceived);

        // transfer funds to receiver
        ERC20(receivingAssetId).safeTransfer(_receiver, amountReceived);

        // emit events (both required for tracking)
        uint256 fromAmount = _swapData.fromAmount;
        emit LibSwap.AssetSwapped(
            _transactionId,
            callTo,
            NATIVE_ADDRESS,
            receivingAssetId,
            fromAmount,
            amountReceived,
            block.timestamp
        );

        emit ILiFi.LiFiGenericSwapCompleted(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            NATIVE_ADDRESS,
            receivingAssetId,
            fromAmount,
            amountReceived
        );
    }

    // MULTIPLE SWAPS

    /// @notice Performs multiple swaps in one transaction, starting with ERC20 and ending with native
    /// @param _transactionId the transaction id associated with the operation
    /// @param _integrator the name of the integrator
    /// @param _referrer the address of the referrer
    /// @param _receiver the address to receive the swapped tokens into (also excess tokens)
    /// @param _minAmountOut the minimum amount of the final asset to receive
    /// @param _swapData an object containing swap related data to perform swaps before bridging
    function swapTokensMultipleV3ERC20ToNative(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData[] calldata _swapData
    ) external {
        _depositMultipleERC20Tokens(_swapData);
        _executeSwaps(_swapData, _transactionId, _receiver);
        _transferNativeTokensAndEmitEvent(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            _minAmountOut,
            _swapData
        );
    }

    /// @notice Performs multiple swaps in one transaction, starting with ERC20 and ending with ERC20
    /// @param _transactionId the transaction id associated with the operation
    /// @param _integrator the name of the integrator
    /// @param _referrer the address of the referrer
    /// @param _receiver the address to receive the swapped tokens into (also excess tokens)
    /// @param _minAmountOut the minimum amount of the final asset to receive
    /// @param _swapData an object containing swap related data to perform swaps before bridging
    function swapTokensMultipleV3ERC20ToERC20(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData[] calldata _swapData
    ) external {
        _depositMultipleERC20Tokens(_swapData);
        _executeSwaps(_swapData, _transactionId, _receiver);
        _transferERC20TokensAndEmitEvent(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            _minAmountOut,
            _swapData
        );
    }

    /// @notice Performs multiple swaps in one transaction, starting with native and ending with ERC20
    /// @param _transactionId the transaction id associated with the operation
    /// @param _integrator the name of the integrator
    /// @param _referrer the address of the referrer
    /// @param _receiver the address to receive the swapped tokens into (also excess tokens)
    /// @param _minAmountOut the minimum amount of the final asset to receive
    /// @param _swapData an object containing swap related data to perform swaps before bridging
    function swapTokensMultipleV3NativeToERC20(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData[] calldata _swapData
    ) external payable {
        _executeSwaps(_swapData, _transactionId, _receiver);
        _transferERC20TokensAndEmitEvent(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            _minAmountOut,
            _swapData
        );
    }

    /// Private helper methods ///
    function _depositMultipleERC20Tokens(
        LibSwap.SwapData[] calldata _swapData
    ) private {
        // initialize variables before loop to save gas
        uint256 numOfSwaps = _swapData.length;
        LibSwap.SwapData calldata currentSwap;

        // go through all swaps and deposit tokens, where required
        for (uint256 i = 0; i < numOfSwaps; ) {
            currentSwap = _swapData[i];
            if (currentSwap.requiresDeposit) {
                // we will not check msg.value as tx will fail anyway if not enough value available
                // thus we only deposit ERC20 tokens here
                ERC20(currentSwap.sendingAssetId).safeTransferFrom(
                    msg.sender,
                    address(this),
                    currentSwap.fromAmount
                );
            }
            unchecked {
                ++i;
            }
        }
    }

    function _depositAndSwapERC20Single(
        LibSwap.SwapData calldata _swapData,
        address _receiver
    ) private {
        ERC20 sendingAsset = ERC20(_swapData.sendingAssetId);
        uint256 fromAmount = _swapData.fromAmount;
        // deposit funds
        sendingAsset.safeTransferFrom(msg.sender, address(this), fromAmount);

        // ensure that contract (callTo) and function selector are whitelisted
        address callTo = _swapData.callTo;
        address approveTo = _swapData.approveTo;
        bytes calldata callData = _swapData.callData;
        if (
            !(LibAllowList.contractIsAllowed(callTo) &&
                LibAllowList.selectorIsAllowed(bytes4(callData[:4])))
        ) revert ContractCallNotAllowed();

        // ensure that approveTo address is also whitelisted if it differs from callTo
        if (approveTo != callTo && !LibAllowList.contractIsAllowed(approveTo))
            revert ContractCallNotAllowed();

        // check if the current allowance is sufficient
        uint256 currentAllowance = sendingAsset.allowance(
            address(this),
            approveTo
        );

        // check if existing allowance is sufficient
        if (currentAllowance < fromAmount) {
            // check if is non-zero, set to 0 if not
            if (currentAllowance != 0) sendingAsset.safeApprove(approveTo, 0);
            // set allowance to uint max to avoid future approvals
            sendingAsset.safeApprove(approveTo, type(uint256).max);
        }

        // execute swap
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory res) = callTo.call(callData);
        if (!success) {
            LibUtil.revertWith(res);
        }

        _returnPositiveSlippageERC20(sendingAsset, _receiver);
    }

    // @dev: this function will not work with swapData that has multiple swaps with the same sendingAssetId
    //       as the _returnPositiveSlippage... functionality will refund all remaining tokens after the first swap
    //       We accept this fact since the use case is not common yet. As an alternative you can always use the
    //       "swapTokensGeneric" function of the original GenericSwapFacet
    function _executeSwaps(
        LibSwap.SwapData[] calldata _swapData,
        bytes32 _transactionId,
        address _receiver
    ) private {
        // initialize variables before loop to save gas
        uint256 numOfSwaps = _swapData.length;
        ERC20 sendingAsset;
        address sendingAssetId;
        address receivingAssetId;
        LibSwap.SwapData calldata currentSwap;
        bool success;
        bytes memory returnData;
        uint256 currentAllowance;

        // go through all swaps
        for (uint256 i = 0; i < numOfSwaps; ) {
            currentSwap = _swapData[i];
            sendingAssetId = currentSwap.sendingAssetId;
            sendingAsset = ERC20(currentSwap.sendingAssetId);
            receivingAssetId = currentSwap.receivingAssetId;

            // check if callTo address is whitelisted
            if (
                !LibAllowList.contractIsAllowed(currentSwap.callTo) ||
                !LibAllowList.selectorIsAllowed(
                    bytes4(currentSwap.callData[:4])
                )
            ) {
                revert ContractCallNotAllowed();
            }

            // if approveTo address is different to callTo, check if it's whitelisted, too
            if (
                currentSwap.approveTo != currentSwap.callTo &&
                !LibAllowList.contractIsAllowed(currentSwap.approveTo)
            ) {
                revert ContractCallNotAllowed();
            }

            if (LibAsset.isNativeAsset(sendingAssetId)) {
                // Native
                // execute the swap
                (success, returnData) = currentSwap.callTo.call{
                    value: currentSwap.fromAmount
                }(currentSwap.callData);
                if (!success) {
                    LibUtil.revertWith(returnData);
                }

                // return any potential leftover sendingAsset tokens
                // but only for swaps, not for fee collections (otherwise the whole amount would be returned before the actual swap)
                if (sendingAssetId != receivingAssetId)
                    _returnPositiveSlippageNative(_receiver);
            } else {
                // ERC20
                // check if the current allowance is sufficient
                currentAllowance = sendingAsset.allowance(
                    address(this),
                    currentSwap.approveTo
                );
                if (currentAllowance < currentSwap.fromAmount) {
                    sendingAsset.safeApprove(currentSwap.approveTo, 0);
                    sendingAsset.safeApprove(
                        currentSwap.approveTo,
                        type(uint256).max
                    );
                }

                // execute the swap
                (success, returnData) = currentSwap.callTo.call(
                    currentSwap.callData
                );
                if (!success) {
                    LibUtil.revertWith(returnData);
                }

                // return any potential leftover sendingAsset tokens
                // but only for swaps, not for fee collections (otherwise the whole amount would be returned before the actual swap)
                if (sendingAssetId != receivingAssetId)
                    _returnPositiveSlippageERC20(sendingAsset, _receiver);
            }

            // emit AssetSwapped event
            // @dev: this event might in some cases emit inaccurate information. e.g. if a token is swapped and this contract already held a balance of the receivingAsset
            //       then the event will show swapOutputAmount + existingBalance as toAmount. We accept this potential inaccuracy in return for gas savings and may update this
            //       at a later stage when the described use case becomes more common
            emit LibSwap.AssetSwapped(
                _transactionId,
                currentSwap.callTo,
                sendingAssetId,
                receivingAssetId,
                currentSwap.fromAmount,
                LibAsset.isNativeAsset(receivingAssetId)
                    ? address(this).balance
                    : ERC20(receivingAssetId).balanceOf(address(this)),
                block.timestamp
            );

            unchecked {
                ++i;
            }
        }
    }

    function _transferERC20TokensAndEmitEvent(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData[] calldata _swapData
    ) private {
        // determine the end result of the swap
        address finalAssetId = _swapData[_swapData.length - 1]
            .receivingAssetId;
        uint256 amountReceived = ERC20(finalAssetId).balanceOf(address(this));

        // make sure minAmountOut was received
        if (amountReceived < _minAmountOut)
            revert CumulativeSlippageTooHigh(_minAmountOut, amountReceived);

        // transfer to receiver
        ERC20(finalAssetId).safeTransfer(_receiver, amountReceived);

        // emit event
        emit ILiFi.LiFiGenericSwapCompleted(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            _swapData[0].sendingAssetId,
            finalAssetId,
            _swapData[0].fromAmount,
            amountReceived
        );
    }

    function _transferNativeTokensAndEmitEvent(
        bytes32 _transactionId,
        string calldata _integrator,
        string calldata _referrer,
        address payable _receiver,
        uint256 _minAmountOut,
        LibSwap.SwapData[] calldata _swapData
    ) private {
        uint256 amountReceived = address(this).balance;

        // make sure minAmountOut was received
        if (amountReceived < _minAmountOut)
            revert CumulativeSlippageTooHigh(_minAmountOut, amountReceived);

        // transfer funds to receiver
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = _receiver.call{ value: amountReceived }("");
        if (!success) {
            revert NativeAssetTransferFailed();
        }

        // emit event
        emit ILiFi.LiFiGenericSwapCompleted(
            _transactionId,
            _integrator,
            _referrer,
            _receiver,
            _swapData[0].sendingAssetId,
            NATIVE_ADDRESS,
            _swapData[0].fromAmount,
            amountReceived
        );
    }

    // returns any unused 'sendingAsset' tokens (=> positive slippage) to the receiver address
    function _returnPositiveSlippageERC20(
        ERC20 sendingAsset,
        address receiver
    ) private {
        // if a balance exists in sendingAsset, it must be positive slippage
        if (address(sendingAsset) != NATIVE_ADDRESS) {
            uint256 sendingAssetBalance = sendingAsset.balanceOf(
                address(this)
            );

            if (sendingAssetBalance > 0) {
                sendingAsset.safeTransfer(receiver, sendingAssetBalance);
            }
        }
    }

    // returns any unused native tokens (=> positive slippage) to the receiver address
    function _returnPositiveSlippageNative(address receiver) private {
        // if a native balance exists in sendingAsset, it must be positive slippage
        uint256 nativeBalance = address(this).balance;

        if (nativeBalance > 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool success, ) = receiver.call{ value: nativeBalance }("");
            if (!success) revert NativeAssetTransferFailed();
        }
    }
}

// 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: 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: 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 { 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: 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 1.0.2
/// @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.forceApprove(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;

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: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
            mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

// 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
// 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/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: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// 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);
        }
    }
}

{
  "remappings": [
    "@eth-optimism/=node_modules/@hop-protocol/sdk/node_modules/@eth-optimism/",
    "@uniswap/=node_modules/@uniswap/",
    "eth-gas-reporter/=node_modules/eth-gas-reporter/",
    "hardhat/=node_modules/hardhat/",
    "hardhat-deploy/=node_modules/hardhat-deploy/",
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "celer-network/=lib/sgn-v2-contracts/",
    "create3-factory/=lib/create3-factory/src/",
    "solmate/=lib/solmate/src/",
    "solady/=lib/solady/src/",
    "permit2/=lib/Permit2/src/",
    "ds-test/=lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "lifi/=src/",
    "test/=test/",
    "Permit2/=lib/Permit2/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-gas-snapshot/=lib/Permit2/lib/forge-gas-snapshot/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "openzeppelin/=lib/openzeppelin-contracts/contracts/",
    "sgn-v2-contracts/=lib/sgn-v2-contracts/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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payable","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_minAmountOut","type":"uint256"},{"components":[{"internalType":"address","name":"callTo","type":"address"},{"internalType":"address","name":"approveTo","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"bool","name":"requiresDeposit","type":"bool"}],"internalType":"struct LibSwap.SwapData","name":"_swapData","type":"tuple"}],"name":"swapTokensSingleV3ERC20ToNative","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_transactionId","type":"bytes32"},{"internalType":"string","name":"_integrator","type":"string"},{"internalType":"string","name":"_referrer","type":"string"},{"internalType":"address payable","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_minAmountOut","type":"uint256"},{"components":[{"internalType":"address","name":"callTo","type":"address"},{"internalType":"address","name":"approveTo","type":"address"},{"internalType":"address","name":"sendingAssetId","type":"address"},{"internalType":"address","name":"receivingAssetId","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"bool","name":"requiresDeposit","type":"bool"}],"internalType":"struct LibSwap.SwapData","name":"_swapData","type":"tuple"}],"name":"swapTokensSingleV3NativeToERC20","outputs":[],"stateMutability":"payable","type":"function"}]

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0000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _nativeAddress (address): 0x0000000000000000000000000000000000000000

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000000