Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

import {EthReceiver} from "./utils/EthReceiver.sol";
import {Interaction} from "./base/RouterStructs.sol";
import {IExecutor} from "./interfaces/IExecutor.sol";
import {IERC20} from "./interfaces/IERC20.sol";
import {SafeERC20} from "./lib/SafeERC20.sol";

/**
 * @title GluexRouter
 * @notice A versatile router contract that enables the execution of on-chain interactions using the `IExecutor` interface.
 * @dev This contract provides functionality for routing tokens through various interactions, collecting routing fees,
 *      and enforcing strict slippage and routing rules for optimal security and usability.
 */
contract GluexRouter is EthReceiver {
    using SafeERC20 for IERC20;

    // Errors
    error InsufficientBalance();
    error NativeTransferFailed();
    error OnlyGlueTreasury();
    error ZeroAddress();

    // Events
    /**
     * @notice Emitted when a routing operation is completed.
     * @param unique_pid The unique identifier for the partner.
     * @param inputToken The ERC20 token used as input.
     * @param inputAmount The amount of input token used for routing.
     * @param outputToken The ERC20 token received as output.
     * @param outputAmount The expected output amount from the route.
     * @param partnerFee The fee charged for the partner.
     * @param routingFee The fee charged for the routing operation.
     * @param finalOutputAmount The actual output amount received after routing.
     */
    event Routed(
        bytes indexed unique_pid,
        IERC20 inputToken,
        uint256 inputAmount,
        IERC20 outputToken,
        uint256 outputAmount,
        uint256 partnerFee,
        uint256 routingFee,
        uint256 finalOutputAmount
    );

    // DataTypes
    /**
     * @dev A generic structure defining the parameters for a route.
     */
    struct RouteDescription {
        IERC20 inputToken; // Token used as input for the route
        IERC20 outputToken; // Token received as output from the route
        address payable inputReceiver; // Address to receive the input token
        address payable outputReceiver; // Address to receive the output token
        uint256 inputAmount; // Amount of input token
        uint256 outputAmount; // Original output amount
        uint256 partnerFee; // Fee for the partner
        uint256 routingFee; // Fee for the routing operation
        uint256 effectiveOutputAmount; // Effective output after deducting the routing fee
        uint256 minOutputAmount; // Minimum acceptable output amount
        bool isPermit2; // Whether to use Permit2 for token transfers
        bytes unique_pid; // Unique identifier for the partner
    }

    // Constants
    uint256 public _RAW_CALL_GAS_LIMIT = 5000;
    uint256 public _MAX_FEE = 5; // 5bps (0.05%)
    uint256 public _MIN_FEE = 1; // 1bps (0.01%)
    uint256 public _TOLERANCE = 100;

    // State Variables
    address public immutable _nativeToken; // Address of the native token (e.g., Ether on Ethereum)
    address internal immutable _glueTreasury; // Address of the Glue treasury contract

    /**
     * @dev Initializes the contract with the treasury address and native token address.
     * @param glueTreasury The address of the Glue treasury contract.
     * @param nativeToken The address of the native token.
     */
    constructor(address glueTreasury, address nativeToken) {
        // Ensure the addresses are not zero
        checkZeroAddress(glueTreasury);
        checkZeroAddress(nativeToken);

        _glueTreasury = glueTreasury;
        _nativeToken = nativeToken;
    }

    /**
     * @dev Modifier to restrict access to treasury-only functions.
     */
    modifier onlyTreasury() {
        checkTreasury();
        _;
    }

    /**
     * @notice Verifies the caller is the Glue treasury.
     * @dev Reverts with `OnlyGlueTreasury` if the caller is not the treasury.
     */
    function checkTreasury() internal view {
        if (msg.sender != _glueTreasury) revert OnlyGlueTreasury();
    }

    /**
     * @notice Verifies the given address is not zero.
     * @param addr The address to verify.
     * @dev Reverts with `ZeroAddress` if the address is zero.
     */
    function checkZeroAddress(address addr) internal pure {
        if (addr == address(0)) revert ZeroAddress();
    }

    /**
     * @notice Collects routing fees from specified tokens and transfers them to the given receiver.
     * @param feeTokens An array of ERC20 tokens from which fees will be collected.
     * @param receiver The address where collected fees will be transferred.
     */
    function collectFees(IERC20[] memory feeTokens, address payable receiver)
        external
        onlyTreasury
    {
        // Ensure the receiver address is valid
        checkZeroAddress(receiver);

        // Collect fees for each token
        uint256 len = feeTokens.length;
        for (uint256 i = 0; i < len; ) {
            uint256 feeBalance = uniBalanceOf(feeTokens[i], address(this));
            uniTransfer(feeTokens[i], receiver, feeBalance);

            unchecked {
                ++i;
            }
        }
    }

    /**
     * @notice Executes a route using the specified executor and interactions.
     * @param executor The executor contract that performs the interactions.
     * @param desc The route description containing input, output, and fee details.
     * @param interactions The interactions encoded for execution by the executor.
     * @return finalOutputAmount The final amount of output token received.
     * @dev Ensures strict validation of slippage, routing fees, and input/output parameters.
     */
    function swap(
        IExecutor executor,
        RouteDescription calldata desc,
        Interaction[] calldata interactions,
        uint256 deadline
    ) external payable returns (uint256 finalOutputAmount) {
        // Deadline check
        if (block.timestamp > deadline) revert("Deadline passed");

        // Validate routing fee
        if (desc.routingFee > (desc.outputAmount * _MAX_FEE) / 10000) revert("Routing fee too high");
        if (desc.routingFee < (desc.outputAmount * _MIN_FEE) / 10000) revert("Routing fee too low");

        // Validate non-zero addresses
        checkZeroAddress(desc.inputReceiver);
        checkZeroAddress(desc.outputReceiver);

        // Validate route parameters
        if (desc.minOutputAmount <= 0) revert("Negative slippage limit");
        if (desc.minOutputAmount > desc.outputAmount) revert("Slippage limit too large");
        if (desc.inputToken == desc.outputToken) revert("Arbitrage not supported");
        if (desc.routingFee <= 0) revert("Negative routing fee");
        if (desc.partnerFee < 0) revert("Negative partner fee");
        if (
            desc.outputAmount <
            desc.effectiveOutputAmount +
                desc.partnerFee +
                desc.routingFee -
                _TOLERANCE ||
            desc.outputAmount >
            desc.effectiveOutputAmount +
                desc.partnerFee +
                desc.routingFee +
                _TOLERANCE
        ) revert("Invalid amounts");

        // Handle native token input validation
        if (address(desc.inputToken) == _nativeToken) {
            if (msg.value != desc.inputAmount) revert("Invalid native token input amount");
        } else {
            if (msg.value != 0) revert("Invalid native token input amount");
            desc.inputToken.safeTransferFromUniversal(
                msg.sender,
                desc.inputReceiver,
                desc.inputAmount,
                desc.isPermit2
            );
        }

        // Execute interactions through the executor
        IERC20 outputToken = desc.outputToken;
        uint256 outputBalanceBefore = uniBalanceOf(outputToken, address(this));
        IExecutor(executor).executeRoute{value: msg.value}(
            interactions,
            desc.outputToken
        );
        uint256 outputBalanceAfter = uniBalanceOf(outputToken, address(this));

        // Calculate final output amount
        uint256 routeOutputAmount = outputBalanceAfter - outputBalanceBefore;
        uint256 routingFee = 0;
        if (routeOutputAmount > desc.effectiveOutputAmount + desc.routingFee) {
            finalOutputAmount = routeOutputAmount - desc.routingFee;
            routingFee = desc.routingFee;
        } else if (routeOutputAmount > desc.effectiveOutputAmount) {
            finalOutputAmount = desc.effectiveOutputAmount;
            routingFee = routeOutputAmount - desc.effectiveOutputAmount;
        } else {
            finalOutputAmount = routeOutputAmount;
        }

        // Ensure final output amount meets the minimum required
        if (finalOutputAmount < desc.minOutputAmount) revert("Negative slippage too large");

        // Transfer the final output amount to the receiver
        uniTransfer(outputToken, desc.outputReceiver, finalOutputAmount);

        emit Routed(
            desc.unique_pid,
            desc.inputToken,
            desc.inputAmount,
            desc.outputToken,
            desc.outputAmount,
            desc.partnerFee,
            routingFee,
            finalOutputAmount
        );
    }

    /**
     * @notice Retrieves the balance of a specified token for a given account.
     * @param token The ERC20 token to check.
     * @param account The account address to query the balance for.
     * @return The balance of the token for the account.
     */
    function uniBalanceOf(IERC20 token, address account)
        internal
        view
        returns (uint256)
    {
        if (address(token) == _nativeToken) {
            uint256 contractBalance;
            assembly {
                contractBalance := balance(account)
            }
            return contractBalance;
        } else {
            return token.balanceOf(account);
        }
    }

    /**
     * @notice Transfers a specified amount of a token to a given address.
     * @param token The ERC20 token to transfer.
     * @param to The address to transfer the token to.
     * @param amount The amount of the token to transfer.
     * @dev Handles both native token and ERC20 transfers.
     */
    function uniTransfer(
        IERC20 token,
        address payable to,
        uint256 amount
    ) internal {
        if (amount > 0) {
            if (address(token) == _nativeToken) {
                uint256 contractBalance;
                assembly {
                    contractBalance := selfbalance()
                }
                if (contractBalance < amount) revert InsufficientBalance();
                (bool success, ) = to.call{
                    value: amount,
                    gas: _RAW_CALL_GAS_LIMIT
                }("");
                if (!success) revert NativeTransferFailed();
            } else {
                token.safeTransfer(to, amount);
            }
        } else {
            revert InsufficientBalance();
        }
    }

    /**
     * @notice Updates the gas limit for raw calls made by the contract.
     * @param gasLimit The new gas limit to be set.
     * @dev This function is restricted to the treasury.
     */
    function setGasLimit(uint256 gasLimit) external onlyTreasury {
        _RAW_CALL_GAS_LIMIT = gasLimit;
    }

    /**
     * @notice Updates the maximum fee that can be charged by the contract.
     * @param maxFee The new maximum fee to be set.
     * @dev This function is restricted to the treasury.
     */
    function setMaxFee(uint256 maxFee) external onlyTreasury {
        _MAX_FEE = maxFee;
    }

    /**
     * @notice Updates the minimum fee that can be charged by the contract.
     * @param minFee The new minimum fee to be set.
     * @dev This function is restricted to the treasury.
     */
    function setMinFee(uint256 minFee) external onlyTreasury {
        _MIN_FEE = minFee;
    }

    /**
     * @notice Updates the tolerance.
     * @param tolerance The new tolerance to be set.
     * @dev This function is restricted to the treasury.
     */
    function setTolerance(uint256 tolerance) external onlyTreasury {
        _TOLERANCE = tolerance;
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

/// @dev generic smart contract interaction
struct Interaction {
    address target;
    uint256 value;
    bytes callData;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

// File @1inch/solidity-utils/contracts/interfaces/[email protected]

interface IDaiLikePermit {
    function permit(
        address holder,
        address spender,
        uint256 nonce,
        uint256 expiry,
        bool allowed,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value
    ) external returns (bool);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

// File @openzeppelin/contracts/token/ERC20/extensions/[email protected]

// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

import {Interaction} from "../base/RouterStructs.sol";
import {IERC20} from "./IERC20.sol";

/// @title Interface for making arbitrary calls
interface IExecutor {
    /// @notice propagates information about original msg.sender and executes arbitrary data
    function executeRoute(
        Interaction[] calldata interactions,
        IERC20 outputToken
    ) external payable;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

// File @1inch/solidity-utils/contracts/interfaces/[email protected]

interface IPermit2 {
    struct PermitDetails {
        // ERC20 token address
        address token;
        // the maximum amount allowed to spend
        uint160 amount;
        // timestamp at which a spender's token allowances become invalid
        uint48 expiration;
        // an incrementing value indexed per owner,token,and spender for each signature
        uint48 nonce;
    }
    /// @notice The permit message signed for a single token allownce
    struct PermitSingle {
        // the permit data for a single token alownce
        PermitDetails details;
        // address permissioned on the allowed tokens
        address spender;
        // deadline on the permit signature
        uint256 sigDeadline;
    }
    /// @notice Packed allowance
    struct PackedAllowance {
        // amount allowed
        uint160 amount;
        // permission expiry
        uint48 expiration;
        // an incrementing value indexed per owner,token,and spender for each signature
        uint48 nonce;
    }

    function transferFrom(
        address user,
        address spender,
        uint160 amount,
        address token
    ) external;

    function permit(
        address owner,
        PermitSingle memory permitSingle,
        bytes calldata signature
    ) external;

    function allowance(
        address user,
        address token,
        address spender
    ) external view returns (PackedAllowance memory);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

// File @1inch/solidity-utils/contracts/libraries/[email protected]

/// @title Revert reason forwarder.
library RevertReasonForwarder {
    /// @dev Forwards latest externall call revert.
    function reRevert() internal pure {
        // bubble up revert reason from latest external call
        assembly ("memory-safe") {
            // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)
            returndatacopy(ptr, 0, returndatasize())
            revert(ptr, returndatasize())
        }
    }

    /// @dev Returns latest external call revert reason.
    function reReason() internal pure returns (bytes memory reason) {
        assembly ("memory-safe") {
            // solhint-disable-line no-inline-assembly
            reason := mload(0x40)
            let length := returndatasize()
            mstore(reason, length)
            returndatacopy(add(reason, 0x20), 0, length)
            mstore(0x40, add(reason, add(0x20, length)))
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

import {IERC20} from "../interfaces/IERC20.sol";
import {IPermit2} from "../interfaces/IPermit2.sol";
import {IERC20Permit} from "../interfaces/IERC20Permit.sol";
import {IDaiLikePermit} from "../interfaces/IDaiLikePermit.sol";
import {RevertReasonForwarder} from "../lib/RevertReasonForwarder.sol";

// File @1inch/solidity-utils/contracts/libraries/[email protected]

/**
 * @title Implements efficient safe methods for ERC20 interface.
 * @notice Compared to the standard ERC20, this implementation offers several enhancements:
 * 1. more gas-efficient, providing significant savings in transaction costs.
 * 2. support for different permit implementations
 * 3. forceApprove functionality
 * 4. support for WETH deposit and withdraw
 */
library SafeERC20 {
    error SafeTransferFailed();
    error SafeTransferFromFailed();
    error ForceApproveFailed();
    error SafeIncreaseAllowanceFailed();
    error SafeDecreaseAllowanceFailed();
    error SafePermitBadLength();
    error Permit2TransferAmountTooHigh();

    // Uniswap Permit2 address
    address private constant _PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3;
    bytes4 private constant _PERMIT_LENGTH_ERROR = 0x68275857; // SafePermitBadLength.selector
    uint256 private constant _RAW_CALL_GAS_LIMIT = 5000;

    /**
     * @notice Fetches the balance of a specific ERC20 token held by an account.
     * Consumes less gas then regular `ERC20.balanceOf`.
     * @dev Note that the implementation does not perform dirty bits cleaning, so it is the
     * responsibility of the caller to make sure that the higher 96 bits of the `account` parameter are clean.
     * @param token The IERC20 token contract for which the balance will be fetched.
     * @param account The address of the account whose token balance will be fetched.
     * @return tokenBalance The balance of the specified ERC20 token held by the account.
     */
    function safeBalanceOf(
        IERC20 token,
        address account
    ) internal view returns (uint256 tokenBalance) {
        bytes4 selector = IERC20.balanceOf.selector;
        assembly ("memory-safe") {
            // solhint-disable-line no-inline-assembly
            mstore(0x00, selector)
            mstore(0x04, account)
            let success := staticcall(gas(), token, 0x00, 0x24, 0x00, 0x20)
            tokenBalance := mload(0)

            if or(iszero(success), lt(returndatasize(), 0x20)) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
        }
    }

    /**
     * @notice Attempts to safely transfer tokens from one address to another.
     * @dev If permit2 is true, uses the Permit2 standard; otherwise uses the standard ERC20 transferFrom.
     * Either requires `true` in return data, or requires target to be smart-contract and empty return data.
     * Note that the implementation does not perform dirty bits cleaning, so it is the responsibility of
     * the caller to make sure that the higher 96 bits of the `from` and `to` parameters are clean.
     * @param token The IERC20 token contract from which the tokens will be transferred.
     * @param from The address from which the tokens will be transferred.
     * @param to The address to which the tokens will be transferred.
     * @param amount The amount of tokens to transfer.
     * @param permit2 If true, uses the Permit2 standard for the transfer; otherwise uses the standard ERC20 transferFrom.
     */
    function safeTransferFromUniversal(
        IERC20 token,
        address from,
        address to,
        uint256 amount,
        bool permit2
    ) internal {
        if (permit2) {
            safeTransferFromPermit2(token, from, to, amount);
        } else {
            safeTransferFrom(token, from, to, amount);
        }
    }

    /**
     * @notice Attempts to safely transfer tokens from one address to another using the ERC20 standard.
     * @dev Either requires `true` in return data, or requires target to be smart-contract and empty return data.
     * Note that the implementation does not perform dirty bits cleaning, so it is the responsibility of
     * the caller to make sure that the higher 96 bits of the `from` and `to` parameters are clean.
     * @param token The IERC20 token contract from which the tokens will be transferred.
     * @param from The address from which the tokens will be transferred.
     * @param to The address to which the tokens will be transferred.
     * @param amount The amount of tokens to transfer.
     */
    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bytes4 selector = token.transferFrom.selector;
        bool success;
        assembly ("memory-safe") {
            // solhint-disable-line no-inline-assembly
            let data := mload(0x40)

            mstore(data, selector)
            mstore(add(data, 0x04), from)
            mstore(add(data, 0x24), to)
            mstore(add(data, 0x44), amount)
            success := call(gas(), token, 0, data, 100, 0x0, 0x20)
            if success {
                switch returndatasize()
                case 0 {
                    success := gt(extcodesize(token), 0)
                }
                default {
                    success := and(gt(returndatasize(), 31), eq(mload(0), 1))
                }
            }
        }
        if (!success) revert SafeTransferFromFailed();
    }

    /**
     * @notice Attempts to safely transfer tokens from one address to another using the Permit2 standard.
     * @dev Either requires `true` in return data, or requires target to be smart-contract and empty return data.
     * Note that the implementation does not perform dirty bits cleaning, so it is the responsibility of
     * the caller to make sure that the higher 96 bits of the `from` and `to` parameters are clean.
     * @param token The IERC20 token contract from which the tokens will be transferred.
     * @param from The address from which the tokens will be transferred.
     * @param to The address to which the tokens will be transferred.
     * @param amount The amount of tokens to transfer.
     */
    function safeTransferFromPermit2(
        IERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        if (amount > type(uint160).max) revert Permit2TransferAmountTooHigh();
        bytes4 selector = IPermit2.transferFrom.selector;
        bool success;
        assembly ("memory-safe") {
            // solhint-disable-line no-inline-assembly
            let data := mload(0x40)

            mstore(data, selector)
            mstore(add(data, 0x04), from)
            mstore(add(data, 0x24), to)
            mstore(add(data, 0x44), amount)
            mstore(add(data, 0x64), token)
            success := call(gas(), _PERMIT2, 0, data, 0x84, 0x0, 0x0)
            if success {
                success := gt(extcodesize(_PERMIT2), 0)
            }
        }
        if (!success) revert SafeTransferFromFailed();
    }

    /**
     * @notice Attempts to safely transfer tokens to another address.
     * @dev Either requires `true` in return data, or requires target to be smart-contract and empty return data.
     * Note that the implementation does not perform dirty bits cleaning, so it is the responsibility of
     * the caller to make sure that the higher 96 bits of the `to` parameter are clean.
     * @param token The IERC20 token contract from which the tokens will be transferred.
     * @param to The address to which the tokens will be transferred.
     * @param value The amount of tokens to transfer.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        if (!_makeCall(token, token.transfer.selector, to, value)) {
            revert SafeTransferFailed();
        }
    }

    /**
     * @notice Attempts to execute the `permit` function on the provided token with the sender and contract as parameters.
     * Permit type is determined automatically based on permit calldata (IERC20Permit, IDaiLikePermit, and IPermit2).
     * @dev Wraps `tryPermit` function and forwards revert reason if permit fails.
     * @param token The IERC20 token to execute the permit function on.
     * @param permit The permit data to be used in the function call.
     */
    function safePermit(IERC20 token, bytes calldata permit) internal {
        if (!tryPermit(token, msg.sender, address(this), permit))
            RevertReasonForwarder.reRevert();
    }

    /**
     * @notice Attempts to execute the `permit` function on the provided token with custom owner and spender parameters.
     * Permit type is determined automatically based on permit calldata (IERC20Permit, IDaiLikePermit, and IPermit2).
     * @dev Wraps `tryPermit` function and forwards revert reason if permit fails.
     * Note that the implementation does not perform dirty bits cleaning, so it is the responsibility of
     * the caller to make sure that the higher 96 bits of the `owner` and `spender` parameters are clean.
     * @param token The IERC20 token to execute the permit function on.
     * @param owner The owner of the tokens for which the permit is made.
     * @param spender The spender allowed to spend the tokens by the permit.
     * @param permit The permit data to be used in the function call.
     */
    function safePermit(
        IERC20 token,
        address owner,
        address spender,
        bytes calldata permit
    ) internal {
        if (!tryPermit(token, owner, spender, permit))
            RevertReasonForwarder.reRevert();
    }

    /**
     * @notice Attempts to execute the `permit` function on the provided token with the sender and contract as parameters.
     * @dev Invokes `tryPermit` with sender as owner and contract as spender.
     * @param token The IERC20 token to execute the permit function on.
     * @param permit The permit data to be used in the function call.
     * @return success Returns true if the permit function was successfully executed, false otherwise.
     */
    function tryPermit(
        IERC20 token,
        bytes calldata permit
    ) internal returns (bool success) {
        return tryPermit(token, msg.sender, address(this), permit);
    }

    /**
     * @notice The function attempts to call the permit function on a given ERC20 token.
     * @dev The function is designed to support a variety of permit functions, namely: IERC20Permit, IDaiLikePermit, and IPermit2.
     * It accommodates both Compact and Full formats of these permit types.
     * Please note, it is expected that the `expiration` parameter for the compact Permit2 and the `deadline` parameter
     * for the compact Permit are to be incremented by one before invoking this function. This approach is motivated by
     * gas efficiency considerations; as the unlimited expiration period is likely to be the most common scenario, and
     * zeros are cheaper to pass in terms of gas cost. Thus, callers should increment the expiration or deadline by one
     * before invocation for optimized performance.
     * Note that the implementation does not perform dirty bits cleaning, so it is the responsibility of
     * the caller to make sure that the higher 96 bits of the `owner` and `spender` parameters are clean.
     * @param token The address of the ERC20 token on which to call the permit function.
     * @param owner The owner of the tokens. This address should have signed the off-chain permit.
     * @param spender The address which will be approved for transfer of tokens.
     * @param permit The off-chain permit data, containing different fields depending on the type of permit function.
     * @return success A boolean indicating whether the permit call was successful.
     */
    function tryPermit(
        IERC20 token,
        address owner,
        address spender,
        bytes calldata permit
    ) internal returns (bool success) {
        // load function selectors for different permit standards
        bytes4 permitSelector = IERC20Permit.permit.selector;
        bytes4 daiPermitSelector = IDaiLikePermit.permit.selector;
        bytes4 permit2Selector = IPermit2.permit.selector;
        assembly ("memory-safe") {
            // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)

            // Switch case for different permit lengths, indicating different permit standards
            switch permit.length
            // Compact IERC20Permit
            case 100 {
                mstore(ptr, permitSelector) // store selector
                mstore(add(ptr, 0x04), owner) // store owner
                mstore(add(ptr, 0x24), spender) // store spender

                // Compact IERC20Permit.permit(uint256 value, uint32 deadline, uint256 r, uint256 vs)
                {
                    // stack too deep
                    let deadline := shr(
                        224,
                        calldataload(add(permit.offset, 0x20))
                    ) // loads permit.offset 0x20..0x23
                    let vs := calldataload(add(permit.offset, 0x44)) // loads permit.offset 0x44..0x63

                    calldatacopy(add(ptr, 0x44), permit.offset, 0x20) // store value     = copy permit.offset 0x00..0x19
                    mstore(add(ptr, 0x64), sub(deadline, 1)) // store deadline  = deadline - 1
                    mstore(add(ptr, 0x84), add(27, shr(255, vs))) // store v         = most significant bit of vs + 27 (27 or 28)
                    calldatacopy(add(ptr, 0xa4), add(permit.offset, 0x24), 0x20) // store r         = copy permit.offset 0x24..0x43
                    mstore(add(ptr, 0xc4), shr(1, shl(1, vs))) // store s         = vs without most significant bit
                }
                // IERC20Permit.permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s)
                success := call(gas(), token, 0, ptr, 0xe4, 0, 0)
            }
            // Compact IDaiLikePermit
            case 72 {
                mstore(ptr, daiPermitSelector) // store selector
                mstore(add(ptr, 0x04), owner) // store owner
                mstore(add(ptr, 0x24), spender) // store spender

                // Compact IDaiLikePermit.permit(uint32 nonce, uint32 expiry, uint256 r, uint256 vs)
                {
                    // stack too deep
                    let expiry := shr(
                        224,
                        calldataload(add(permit.offset, 0x04))
                    ) // loads permit.offset 0x04..0x07
                    let vs := calldataload(add(permit.offset, 0x28)) // loads permit.offset 0x28..0x47

                    mstore(
                        add(ptr, 0x44),
                        shr(224, calldataload(permit.offset))
                    ) // store nonce   = copy permit.offset 0x00..0x03
                    mstore(add(ptr, 0x64), sub(expiry, 1)) // store expiry  = expiry - 1
                    mstore(add(ptr, 0x84), true) // store allowed = true
                    mstore(add(ptr, 0xa4), add(27, shr(255, vs))) // store v       = most significant bit of vs + 27 (27 or 28)
                    calldatacopy(add(ptr, 0xc4), add(permit.offset, 0x08), 0x20) // store r       = copy permit.offset 0x08..0x27
                    mstore(add(ptr, 0xe4), shr(1, shl(1, vs))) // store s       = vs without most significant bit
                }
                // IDaiLikePermit.permit(address holder, address spender, uint256 nonce, uint256 expiry, bool allowed, uint8 v, bytes32 r, bytes32 s)
                success := call(gas(), token, 0, ptr, 0x104, 0, 0)
            }
            // IERC20Permit
            case 224 {
                mstore(ptr, permitSelector)
                calldatacopy(add(ptr, 0x04), permit.offset, permit.length) // copy permit calldata
                // IERC20Permit.permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s)
                success := call(gas(), token, 0, ptr, 0xe4, 0, 0)
            }
            // IDaiLikePermit
            case 256 {
                mstore(ptr, daiPermitSelector)
                calldatacopy(add(ptr, 0x04), permit.offset, permit.length) // copy permit calldata
                // IDaiLikePermit.permit(address holder, address spender, uint256 nonce, uint256 expiry, bool allowed, uint8 v, bytes32 r, bytes32 s)
                success := call(gas(), token, 0, ptr, 0x104, 0, 0)
            }
            // Compact IPermit2
            case 96 {
                // Compact IPermit2.permit(uint160 amount, uint32 expiration, uint32 nonce, uint32 sigDeadline, uint256 r, uint256 vs)
                mstore(ptr, permit2Selector) // store selector
                mstore(add(ptr, 0x04), owner) // store owner
                mstore(add(ptr, 0x24), token) // store token

                calldatacopy(add(ptr, 0x50), permit.offset, 0x14) // store amount = copy permit.offset 0x00..0x13
                // and(0xffffffffffff, ...) - conversion to uint48
                mstore(
                    add(ptr, 0x64),
                    and(
                        0xffffffffffff,
                        sub(shr(224, calldataload(add(permit.offset, 0x14))), 1)
                    )
                ) // store expiration = ((permit.offset 0x14..0x17 - 1) & 0xffffffffffff)
                mstore(
                    add(ptr, 0x84),
                    shr(224, calldataload(add(permit.offset, 0x18)))
                ) // store nonce = copy permit.offset 0x18..0x1b
                mstore(add(ptr, 0xa4), spender) // store spender
                // and(0xffffffffffff, ...) - conversion to uint48
                mstore(
                    add(ptr, 0xc4),
                    and(
                        0xffffffffffff,
                        sub(shr(224, calldataload(add(permit.offset, 0x1c))), 1)
                    )
                ) // store sigDeadline = ((permit.offset 0x1c..0x1f - 1) & 0xffffffffffff)
                mstore(add(ptr, 0xe4), 0x100) // store offset = 256
                mstore(add(ptr, 0x104), 0x40) // store length = 64
                calldatacopy(add(ptr, 0x124), add(permit.offset, 0x20), 0x20) // store r      = copy permit.offset 0x20..0x3f
                calldatacopy(add(ptr, 0x144), add(permit.offset, 0x40), 0x20) // store vs     = copy permit.offset 0x40..0x5f
                // IPermit2.permit(address owner, PermitSingle calldata permitSingle, bytes calldata signature)
                success := call(gas(), _PERMIT2, 0, ptr, 0x164, 0, 0)
            }
            // IPermit2
            case 352 {
                mstore(ptr, permit2Selector)
                calldatacopy(add(ptr, 0x04), permit.offset, permit.length) // copy permit calldata
                // IPermit2.permit(address owner, PermitSingle calldata permitSingle, bytes calldata signature)
                success := call(gas(), _PERMIT2, 0, ptr, 0x164, 0, 0)
            }
            // Unknown
            default {
                mstore(ptr, _PERMIT_LENGTH_ERROR)
                revert(ptr, 4)
            }
        }
    }

    /**
     * @dev Executes a low level call to a token contract, making it resistant to reversion and erroneous boolean returns.
     * @param token The IERC20 token contract on which the call will be made.
     * @param selector The function signature that is to be called on the token contract.
     * @param to The address to which the token amount will be transferred.
     * @param amount The token amount to be transferred.
     * @return success A boolean indicating if the call was successful. Returns 'true' on success and 'false' on failure.
     * In case of success but no returned data, validates that the contract code exists.
     * In case of returned data, ensures that it's a boolean `true`.
     */
    function _makeCall(
        IERC20 token,
        bytes4 selector,
        address to,
        uint256 amount
    ) private returns (bool success) {
        assembly ("memory-safe") {
            // solhint-disable-line no-inline-assembly
            let data := mload(0x40)

            mstore(data, selector)
            mstore(add(data, 0x04), to)
            mstore(add(data, 0x24), amount)
            success := call(gas(), token, 0, data, 0x44, 0x0, 0x20)
            if success {
                switch returndatasize()
                case 0 {
                    success := gt(extcodesize(token), 0)
                }
                default {
                    success := and(gt(returndatasize(), 31), eq(mload(0), 1))
                }
            }
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

abstract contract EthReceiver {
    error EthDepositRejected();

    receive() external payable {
        _receive();
    }

    function _receive() internal virtual {
        // solhint-disable-next-line avoid-tx-origin
        if (msg.sender == tx.origin) revert EthDepositRejected();
    }
}