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

import {Proxy} from "@axelar-network/axelar-gmp-sdk-solidity/contracts/upgradables/Proxy.sol";

contract SquidRouterProxy is Proxy {
    function contractId() internal pure override returns (bytes32 id) {
        id = keccak256("squid-router");
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

import './IUpgradable.sol';

// This should be owned by the microservice that is paying for gas.
interface IAxelarGasService is IUpgradable {
    error NothingReceived();
    error TransferFailed();
    error InvalidAddress();

    event GasPaidForContractCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasPaidForContractCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForContractCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForContractCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasAdded(bytes32 indexed txHash, uint256 indexed logIndex, address gasToken, uint256 gasFeeAmount, address refundAddress);

    event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress);

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payGasForContractCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payGasForContractCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payNativeGasForContractCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address refundAddress
    ) external payable;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payNativeGasForContractCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address refundAddress
    ) external payable;

    function addGas(
        bytes32 txHash,
        uint256 txIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    function addNativeGas(
        bytes32 txHash,
        uint256 logIndex,
        address refundAddress
    ) external payable;

    function collectFees(address payable receiver, address[] calldata tokens) external;

    function refund(
        address payable receiver,
        address token,
        uint256 amount
    ) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

// General interface for upgradable contracts
interface IUpgradable {
    error NotOwner();
    error InvalidOwner();
    error InvalidCodeHash();
    error InvalidImplementation();
    error SetupFailed();
    error NotProxy();

    event Upgraded(address indexed newImplementation);
    event OwnershipTransferred(address indexed newOwner);

    // Get current owner
    function owner() external view returns (address);

    function contractId() external pure returns (bytes32);

    function implementation() external view returns (address);

    function upgrade(
        address newImplementation,
        bytes32 newImplementationCodeHash,
        bytes calldata params
    ) external;

    function setup(bytes calldata data) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol';
import { IERC20 } from '../interfaces/IERC20.sol';
import { IAxelarForecallable } from '../interfaces/IAxelarForecallable.sol';

contract AxelarForecallable is IAxelarForecallable {
    IAxelarGateway public immutable gateway;

    //keccak256('forecallers');
    uint256 public constant FORECALLERS_SALT = 0xdb79ee324babd8834c3c1a1a2739c004fce73b812ac9f637241ff47b19e4b71f;

    constructor(address gateway_) {
        if (gateway_ == address(0)) revert InvalidAddress();

        gateway = IAxelarGateway(gateway_);
    }

    function getForecaller(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) public view override returns (address forecaller) {
        bytes32 pos = keccak256(abi.encode(sourceChain, sourceAddress, payload, FORECALLERS_SALT));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            forecaller := sload(pos)
        }
    }

    function _setForecaller(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        address forecaller
    ) internal {
        bytes32 pos = keccak256(abi.encode(sourceChain, sourceAddress, payload, FORECALLERS_SALT));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(pos, forecaller)
        }
    }

    function forecall(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external {
        _checkForecall(sourceChain, sourceAddress, payload, msg.sender);
        if (getForecaller(sourceChain, sourceAddress, payload) != address(0)) revert AlreadyForecalled();
        _setForecaller(sourceChain, sourceAddress, payload, msg.sender);
        _execute(sourceChain, sourceAddress, payload);
    }

    function execute(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external override {
        bytes32 payloadHash = keccak256(payload);
        if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash))
            revert NotApprovedByGateway();
        address forecaller = getForecaller(sourceChain, sourceAddress, payload);
        if (forecaller != address(0)) {
            _setForecaller(sourceChain, sourceAddress, payload, address(0));
        } else {
            _execute(sourceChain, sourceAddress, payload);
        }
    }

    function getForecallerWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount
    ) public view override returns (address forecaller) {
        bytes32 pos = keccak256(abi.encode(sourceChain, sourceAddress, payload, symbol, amount, FORECALLERS_SALT));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            forecaller := sload(pos)
        }
    }

    function _setForecallerWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address forecaller
    ) internal {
        bytes32 pos = keccak256(abi.encode(sourceChain, sourceAddress, payload, symbol, amount, FORECALLERS_SALT));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(pos, forecaller)
        }
    }

    function forecallWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external override {
        address token = gateway.tokenAddresses(tokenSymbol);
        uint256 amountPost = amountPostFee(amount, payload);
        _safeTransferFrom(token, msg.sender, amountPost);
        _checkForecallWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount, msg.sender);
        if (getForecallerWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount) != address(0))
            revert AlreadyForecalled();
        _setForecallerWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount, msg.sender);
        _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amountPost);
    }

    function executeWithToken(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external override {
        bytes32 payloadHash = keccak256(payload);
        if (
            !gateway.validateContractCallAndMint(
                commandId,
                sourceChain,
                sourceAddress,
                payloadHash,
                tokenSymbol,
                amount
            )
        ) revert NotApprovedByGateway();
        address forecaller = getForecallerWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount);
        if (forecaller != address(0)) {
            _setForecallerWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount, address(0));
            address token = gateway.tokenAddresses(tokenSymbol);
            _safeTransfer(token, forecaller, amount);
        } else {
            _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount);
        }
    }

    function _execute(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) internal virtual {}

    function _executeWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) internal virtual {}

    // Override this to keep a fee.
    function amountPostFee(
        uint256 amount,
        bytes calldata /*payload*/
    ) public virtual override returns (uint256) {
        return amount;
    }

    // Override this and revert if you want to only allow certain people/calls to be able to forecall.
    function _checkForecall(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        address forecaller
    ) internal virtual {}

    // Override this and revert if you want to only allow certain people/calls to be able to forecall.
    function _checkForecallWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount,
        address forecaller
    ) internal virtual {}

    function _safeTransfer(
        address tokenAddress,
        address receiver,
        uint256 amount
    ) internal {
        (bool success, bytes memory returnData) = tokenAddress.call(
            abi.encodeWithSelector(IERC20.transfer.selector, receiver, amount)
        );
        bool transferred = success && (returnData.length == uint256(0) || abi.decode(returnData, (bool)));

        if (!transferred || tokenAddress.code.length == 0) revert TransferFailed();
    }

    function _safeTransferFrom(
        address tokenAddress,
        address from,
        uint256 amount
    ) internal {
        (bool success, bytes memory returnData) = tokenAddress.call(
            abi.encodeWithSelector(IERC20.transferFrom.selector, from, address(this), amount)
        );
        bool transferred = success && (returnData.length == uint256(0) || abi.decode(returnData, (bool)));

        if (!transferred || tokenAddress.code.length == 0) revert TransferFailed();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol';

interface IAxelarExecutable {
    error InvalidAddress();
    error NotApprovedByGateway();

    function gateway() external view returns (IAxelarGateway);

    function execute(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external;

    function executeWithToken(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol';

interface IAxelarForecallable is IAxelarExecutable {
    error AlreadyForecalled();
    error TransferFailed();

    function forecall(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external;

    function forecallWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external;

    function getForecaller(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external returns (address forecaller);

    function getForecallerWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount
    ) external returns (address forecaller);

    function amountPostFee(uint256 amount, bytes calldata payload) external returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IAxelarGateway {
    /**********\
    |* Errors *|
    \**********/

    error NotSelf();
    error NotProxy();
    error InvalidCodeHash();
    error SetupFailed();
    error InvalidAuthModule();
    error InvalidTokenDeployer();
    error InvalidAmount();
    error InvalidChainId();
    error InvalidCommands();
    error TokenDoesNotExist(string symbol);
    error TokenAlreadyExists(string symbol);
    error TokenDeployFailed(string symbol);
    error TokenContractDoesNotExist(address token);
    error BurnFailed(string symbol);
    error MintFailed(string symbol);
    error InvalidSetMintLimitsParams();
    error ExceedMintLimit(string symbol);

    /**********\
    |* Events *|
    \**********/

    event TokenSent(
        address indexed sender,
        string destinationChain,
        string destinationAddress,
        string symbol,
        uint256 amount
    );

    event ContractCall(
        address indexed sender,
        string destinationChain,
        string destinationContractAddress,
        bytes32 indexed payloadHash,
        bytes payload
    );

    event ContractCallWithToken(
        address indexed sender,
        string destinationChain,
        string destinationContractAddress,
        bytes32 indexed payloadHash,
        bytes payload,
        string symbol,
        uint256 amount
    );

    event Executed(bytes32 indexed commandId);

    event TokenDeployed(string symbol, address tokenAddresses);

    event ContractCallApproved(
        bytes32 indexed commandId,
        string sourceChain,
        string sourceAddress,
        address indexed contractAddress,
        bytes32 indexed payloadHash,
        bytes32 sourceTxHash,
        uint256 sourceEventIndex
    );

    event ContractCallApprovedWithMint(
        bytes32 indexed commandId,
        string sourceChain,
        string sourceAddress,
        address indexed contractAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        bytes32 sourceTxHash,
        uint256 sourceEventIndex
    );

    event TokenMintLimitUpdated(string symbol, uint256 limit);

    event OperatorshipTransferred(bytes newOperatorsData);

    event Upgraded(address indexed implementation);

    /********************\
    |* Public Functions *|
    \********************/

    function sendToken(
        string calldata destinationChain,
        string calldata destinationAddress,
        string calldata symbol,
        uint256 amount
    ) external;

    function callContract(
        string calldata destinationChain,
        string calldata contractAddress,
        bytes calldata payload
    ) external;

    function callContractWithToken(
        string calldata destinationChain,
        string calldata contractAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount
    ) external;

    function isContractCallApproved(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        address contractAddress,
        bytes32 payloadHash
    ) external view returns (bool);

    function isContractCallAndMintApproved(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        address contractAddress,
        bytes32 payloadHash,
        string calldata symbol,
        uint256 amount
    ) external view returns (bool);

    function validateContractCall(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes32 payloadHash
    ) external returns (bool);

    function validateContractCallAndMint(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes32 payloadHash,
        string calldata symbol,
        uint256 amount
    ) external returns (bool);

    /***********\
    |* Getters *|
    \***********/

    function authModule() external view returns (address);

    function tokenDeployer() external view returns (address);

    function tokenMintLimit(string memory symbol) external view returns (uint256);

    function tokenMintAmount(string memory symbol) external view returns (uint256);

    function allTokensFrozen() external view returns (bool);

    function implementation() external view returns (address);

    function tokenAddresses(string memory symbol) external view returns (address);

    function tokenFrozen(string memory symbol) external view returns (bool);

    function isCommandExecuted(bytes32 commandId) external view returns (bool);

    function adminEpoch() external view returns (uint256);

    function adminThreshold(uint256 epoch) external view returns (uint256);

    function admins(uint256 epoch) external view returns (address[] memory);

    /*******************\
    |* Admin Functions *|
    \*******************/

    function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external;

    function upgrade(
        address newImplementation,
        bytes32 newImplementationCodeHash,
        bytes calldata setupParams
    ) external;

    /**********************\
    |* External Functions *|
    \**********************/

    function setup(bytes calldata params) external;

    function execute(bytes calldata input) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    error InvalidAccount();

    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// General interface for upgradable contracts
interface IUpgradable {
    error NotOwner();
    error InvalidOwner();
    error InvalidCodeHash();
    error InvalidImplementation();
    error SetupFailed();
    error NotProxy();

    event Upgraded(address indexed newImplementation);
    event OwnershipTransferred(address indexed newOwner);

    // Get current owner
    function owner() external view returns (address);

    function contractId() external pure returns (bytes32);

    function upgrade(
        address newImplementation,
        bytes32 newImplementationCodeHash,
        bytes calldata params
    ) external;

    function setup(bytes calldata data) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

library StringToAddress {
    function toAddress(string memory _a) internal pure returns (address) {
        bytes memory tmp = bytes(_a);
        if (tmp.length != 42) return address(0);
        uint160 iaddr = 0;
        uint8 b;
        for (uint256 i = 2; i < 42; i++) {
            b = uint8(tmp[i]);
            if ((b >= 97) && (b <= 102)) b -= 87;
            else if ((b >= 65) && (b <= 70)) b -= 55;
            else if ((b >= 48) && (b <= 57)) b -= 48;
            else return address(0);
            iaddr |= uint160(uint256(b) << ((41 - i) << 2));
        }
        return address(iaddr);
    }
}

library AddressToString {
    function toString(address a) internal pure returns (string memory) {
        bytes memory data = abi.encodePacked(a);
        bytes memory characters = '0123456789abcdef';
        bytes memory byteString = new bytes(2 + data.length * 2);

        byteString[0] = '0';
        byteString[1] = 'x';

        for (uint256 i; i < data.length; ++i) {
            byteString[2 + i * 2] = characters[uint256(uint8(data[i] >> 4))];
            byteString[3 + i * 2] = characters[uint256(uint8(data[i] & 0x0f))];
        }
        return string(byteString);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IUpgradable } from '../interfaces/IUpgradable.sol';

contract Proxy {
    error InvalidImplementation();
    error SetupFailed();
    error EtherNotAccepted();
    error NotOwner();
    error AlreadyInitialized();

    // bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    // keccak256('owner')
    bytes32 internal constant _OWNER_SLOT = 0x02016836a56b71f0d02689e69e326f4f4c1b9057164ef592671cf0d37c8040c0;

    constructor() {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(_OWNER_SLOT, caller())
        }
    }

    function init(
        address implementationAddress,
        address newOwner,
        bytes memory params
    ) external {
        address owner;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            owner := sload(_OWNER_SLOT)
        }
        if (msg.sender != owner) revert NotOwner();
        if (implementation() != address(0)) revert AlreadyInitialized();
        if (IUpgradable(implementationAddress).contractId() != contractId()) revert InvalidImplementation();

        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(_IMPLEMENTATION_SLOT, implementationAddress)
            sstore(_OWNER_SLOT, newOwner)
        }
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = implementationAddress.delegatecall(
            //0x9ded06df is the setup selector.
            abi.encodeWithSelector(0x9ded06df, params)
        );
        if (!success) revert SetupFailed();
    }

    // solhint-disable-next-line no-empty-blocks
    function contractId() internal pure virtual returns (bytes32) {}

    function implementation() public view returns (address implementation_) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            implementation_ := sload(_IMPLEMENTATION_SLOT)
        }
    }

    // solhint-disable-next-line no-empty-blocks
    function setup(bytes calldata data) public {}

    // solhint-disable-next-line no-complex-fallback
    fallback() external payable {
        address implementaion_ = implementation();
        // solhint-disable-next-line no-inline-assembly
        assembly {
            calldatacopy(0, 0, calldatasize())

            let result := delegatecall(gas(), implementaion_, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())

            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    receive() external payable virtual {
        revert EtherNotAccepted();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import '../interfaces/IUpgradable.sol';

abstract contract Upgradable is IUpgradable {
    // bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    // keccak256('owner')
    bytes32 internal constant _OWNER_SLOT = 0x02016836a56b71f0d02689e69e326f4f4c1b9057164ef592671cf0d37c8040c0;

    modifier onlyOwner() {
        if (owner() != msg.sender) revert NotOwner();
        _;
    }

    function owner() public view returns (address owner_) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            owner_ := sload(_OWNER_SLOT)
        }
    }

    function transferOwnership(address newOwner) external virtual onlyOwner {
        if (newOwner == address(0)) revert InvalidOwner();

        emit OwnershipTransferred(newOwner);
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(_OWNER_SLOT, newOwner)
        }
    }

    function implementation() public view returns (address implementation_) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            implementation_ := sload(_IMPLEMENTATION_SLOT)
        }
    }

    function upgrade(
        address newImplementation,
        bytes32 newImplementationCodeHash,
        bytes calldata params
    ) external override onlyOwner {
        if (IUpgradable(newImplementation).contractId() != IUpgradable(this).contractId())
            revert InvalidImplementation();
        if (newImplementationCodeHash != newImplementation.codehash) revert InvalidCodeHash();

        if (params.length > 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool success, ) = newImplementation.delegatecall(abi.encodeWithSelector(this.setup.selector, params));

            if (!success) revert SetupFailed();
        }

        emit Upgraded(newImplementation);
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(_IMPLEMENTATION_SLOT, newImplementation)
        }
    }

    function setup(bytes calldata data) external override {
        // Prevent setup from being called on the implementation
        if (implementation() == address(0)) revert NotProxy();

        _setup(data);
    }

    // solhint-disable-next-line no-empty-blocks
    function _setup(bytes calldata data) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

pragma solidity >=0.6.2;

interface IPangolinRouter {
    function factory() external pure returns (address);
    function WAVAX() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityAVAX(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountAVAXMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountAVAX, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityAVAX(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountAVAXMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountAVAX);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityAVAXWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountAVAXMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountAVAX);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactAVAXForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactAVAX(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForAVAX(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapAVAXForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);

    function removeLiquidityAVAXSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountAVAXMin,
        address to,
        uint deadline
    ) external returns (uint amountAVAX);
    function removeLiquidityAVAXWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountAVAXMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountAVAX);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactAVAXForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForAVAXSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >0.0.0;
import '@pangolindex/exchange-contracts/contracts/pangolin-periphery/interfaces/IPangolinRouter.sol';

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

interface IRoledPausable {
    event PauserProposed(address indexed currentPauser, address indexed pendingPauser);
    event PauserUpdated(address indexed pendingPauser);
    event Paused();
    event Unpaused();

    error ContractIsPaused();
    error NotPauser();
    error NotPendingPauser();

    function updatePauser(address _newPauser) external;

    function acceptPauser() external;

    function pause() external;

    function unpause() external;

    function paused() external view returns (bool value);

    function pauser() external view returns (address value);

    function pendingPauser() external view returns (address value);
}

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

interface ISquidFeeCollector {
    event FeeCollected(address token, address integrator, uint256 squidFee, uint256 integratorFee);
    event FeeWithdrawn(address token, address account, uint256 amount);

    error TransferFailed();
    error ExcessiveIntegratorFee();

    function collectFee(
        address token,
        uint256 amountToTax,
        address integratorAddress,
        uint256 integratorFee
    ) external;

    function withdrawFee(address token) external;

    function getBalance(address token, address account) external view returns (uint256 accountBalance);
}

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

interface ISquidMulticall {
    enum CallType {
        Default,
        FullTokenBalance,
        FullNativeBalance,
        CollectTokenBalance
    }

    struct Call {
        CallType callType;
        address target;
        uint256 value;
        bytes callData;
        bytes payload;
    }

    error AlreadyRunning();
    error CallFailed(uint256 callPosition, bytes reason);

    function run(Call[] calldata calls) external payable;
}

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

import {ISquidMulticall} from "./ISquidMulticall.sol";

interface ISquidRouter {
    event CrossMulticallExecuted(bytes32 indexed payloadHash);
    event CrossMulticallFailed(bytes32 indexed payloadHash, bytes reason, address indexed refundRecipient);

    function bridgeCall(
        string calldata destinationChain,
        string calldata bridgedTokenSymbol,
        uint256 amount,
        ISquidMulticall.Call[] calldata calls,
        address refundRecipient,
        bool forecallEnabled
    ) external payable;

    function callBridge(
        address token,
        uint256 amount,
        string calldata destinationChain,
        string calldata destinationAddress,
        string calldata bridgedTokenSymbol,
        ISquidMulticall.Call[] calldata calls
    ) external payable;

    function callBridgeCall(
        address token,
        uint256 amount,
        string calldata destinationChain,
        string calldata bridgedTokenSymbol,
        ISquidMulticall.Call[] calldata sourceCalls,
        ISquidMulticall.Call[] calldata destinationCalls,
        address refundRecipient,
        bool forecallEnabled
    ) external payable;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

library StorageSlot {
    function setUint256(bytes32 slot, uint256 value) internal {
        assembly {
            sstore(slot, value)
        }
    }

    function getUint256(bytes32 slot) internal view returns (uint256 value) {
        assembly {
            value := sload(slot)
        }
    }

    function setAddress(bytes32 slot, address value) internal {
        assembly {
            sstore(slot, value)
        }
    }

    function getAddress(bytes32 slot) internal view returns (address value) {
        assembly {
            value := sload(slot)
        }
    }

    function setBool(bytes32 slot, bool value) internal {
        assembly {
            sstore(slot, value)
        }
    }

    function getBool(bytes32 slot) internal view returns (bool value) {
        assembly {
            value := sload(slot)
        }
    }
}

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

import {IRoledPausable} from "./interfaces/IRoledPausable.sol";
import {StorageSlot} from "./libraries/StorageSlot.sol";

abstract contract RoledPausable is IRoledPausable {
    using StorageSlot for bytes32;

    bytes32 internal constant PAUSED_SLOT = keccak256("RoledPausable.paused");
    bytes32 internal constant PAUSER_SLOT = keccak256("RoledPausable.pauser");
    bytes32 internal constant PENDING_PAUSER_SLOT = keccak256("RoledPausable.pendingPauser");

    modifier whenNotPaused() {
        if (paused()) revert ContractIsPaused();
        _;
    }

    modifier onlyPauser() {
        if (msg.sender != pauser()) revert NotPauser();
        _;
    }

    constructor() {
        _setPauser(msg.sender);
    }

    function updatePauser(address newPauser) external onlyPauser {
        PENDING_PAUSER_SLOT.setAddress(newPauser);
        emit PauserProposed(msg.sender, newPauser);
    }

    function acceptPauser() external {
        if (msg.sender != pendingPauser()) revert NotPendingPauser();
        _setPauser(msg.sender);
        PENDING_PAUSER_SLOT.setAddress(address(0));
    }

    function pause() external virtual onlyPauser {
        PAUSED_SLOT.setBool(true);
        emit Paused();
    }

    function unpause() external virtual onlyPauser {
        PAUSED_SLOT.setBool(false);
        emit Unpaused();
    }

    function pauser() public view returns (address value) {
        value = PAUSER_SLOT.getAddress();
    }

    function paused() public view returns (bool value) {
        value = PAUSED_SLOT.getBool();
    }

    function pendingPauser() public view returns (address value) {
        value = PENDING_PAUSER_SLOT.getAddress();
    }

    function _setPauser(address _pauser) internal {
        PAUSER_SLOT.setAddress(_pauser);
        emit PauserUpdated(_pauser);
    }
}

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

import {Upgradable} from "@axelar-network/axelar-gmp-sdk-solidity/contracts/upgradables/Upgradable.sol";
import {ISquidFeeCollector} from "./interfaces/ISquidFeeCollector.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract SquidFeeCollector is ISquidFeeCollector, Upgradable {
    bytes32 private constant BALANCES_PREFIX = keccak256("SquidFeeCollector.balances");
    bytes32 private constant SPECIFIC_FEES_PREFIX = keccak256("SquidFeeCollector.specificFees");
    address public immutable squidTeam;
    // Value expected with 2 decimals
    /// eg. 825 is 8.25%
    uint256 public immutable squidDefaultFee;

    error ZeroAddressProvided();

    constructor(address _squidTeam, uint256 _squidDefaultFee) {
        if (_squidTeam == address(0)) revert ZeroAddressProvided();

        squidTeam = _squidTeam;
        squidDefaultFee = _squidDefaultFee;
    }

    /// @param integratorFee Value expected with 2 decimals
    /// eg. 825 is 8.25%
    function collectFee(
        address token,
        uint256 amountToTax,
        address integratorAddress,
        uint256 integratorFee
    ) external {
        if (integratorFee > 1000) revert ExcessiveIntegratorFee();

        uint256 specificFee = getSpecificFee(integratorAddress);
        uint256 squidFee = specificFee == 0 ? squidDefaultFee : specificFee;

        uint256 baseFeeAmount = (amountToTax * integratorFee) / 10000;
        uint256 squidFeeAmount = (baseFeeAmount * squidFee) / 10000;
        uint256 integratorFeeAmount = baseFeeAmount - squidFeeAmount;

        _safeTransferFrom(token, msg.sender, baseFeeAmount);
        _setBalance(token, squidTeam, getBalance(token, squidTeam) + squidFeeAmount);
        _setBalance(token, integratorAddress, getBalance(token, integratorAddress) + integratorFeeAmount);

        emit FeeCollected(token, integratorAddress, squidFeeAmount, integratorFeeAmount);
    }

    function withdrawFee(address token) external {
        uint256 balance = getBalance(token, msg.sender);
        _setBalance(token, msg.sender, 0);
        _safeTransfer(token, msg.sender, balance);

        emit FeeWithdrawn(token, msg.sender, balance);
    }

    function setSpecificFee(address integrator, uint256 fee) external onlyOwner {
        bytes32 slot = _computeSpecificFeeSlot(integrator);
        assembly {
            sstore(slot, fee)
        }
    }

    function getBalance(address token, address account) public view returns (uint256 value) {
        bytes32 slot = _computeBalanceSlot(token, account);
        assembly {
            value := sload(slot)
        }
    }

    function getSpecificFee(address integrator) public view returns (uint256 value) {
        bytes32 slot = _computeSpecificFeeSlot(integrator);
        assembly {
            value := sload(slot)
        }
    }

    function contractId() external pure returns (bytes32 id) {
        id = keccak256("squid-fee-collector");
    }

    function _setBalance(
        address token,
        address account,
        uint256 amount
    ) private {
        bytes32 slot = _computeBalanceSlot(token, account);
        assembly {
            sstore(slot, amount)
        }
    }

    function _computeBalanceSlot(address token, address account) private pure returns (bytes32 slot) {
        slot = keccak256(abi.encodePacked(BALANCES_PREFIX, token, account));
    }

    function _computeSpecificFeeSlot(address integrator) private pure returns (bytes32 slot) {
        slot = keccak256(abi.encodePacked(SPECIFIC_FEES_PREFIX, integrator));
    }

    function _safeTransferFrom(
        address token,
        address from,
        uint256 amount
    ) internal {
        (bool success, bytes memory returnData) = token.call(
            abi.encodeWithSelector(IERC20.transferFrom.selector, from, address(this), amount)
        );
        bool transferred = success && (returnData.length == uint256(0) || abi.decode(returnData, (bool)));
        if (!transferred || token.code.length == 0) revert TransferFailed();
    }

    function _safeTransfer(
        address token,
        address to,
        uint256 amount
    ) internal {
        (bool success, bytes memory returnData) = token.call(
            abi.encodeWithSelector(IERC20.transfer.selector, to, amount)
        );
        bool transferred = success && (returnData.length == uint256(0) || abi.decode(returnData, (bool)));
        if (!transferred || token.code.length == 0) revert TransferFailed();
    }
}

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

import {Proxy} from "@axelar-network/axelar-gmp-sdk-solidity/contracts/upgradables/Proxy.sol";

contract SquidFeeCollectorProxy is Proxy {
    function contractId() internal pure override returns (bytes32 id) {
        id = keccak256("squid-fee-collector");
    }
}

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

import {ISquidMulticall} from "./interfaces/ISquidMulticall.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract SquidMulticall is ISquidMulticall {
    bool private isRunning;

    error TransferFailed();

    function run(Call[] calldata calls) external payable {
        // Prevents reentrancy
        if (isRunning) revert AlreadyRunning();
        isRunning = true;

        for (uint256 i = 0; i < calls.length; i++) {
            Call memory call = calls[i];

            if (call.callType == CallType.FullTokenBalance) {
                (address token, uint256 amountParameterPosition) = abi.decode(call.payload, (address, uint256));
                uint256 amount = IERC20(token).balanceOf(address(this));
                _setCallDataParameter(call.callData, amountParameterPosition, amount);
            } else if (call.callType == CallType.FullNativeBalance) {
                call.value = address(this).balance;
            } else if (call.callType == CallType.CollectTokenBalance) {
                address token = abi.decode(call.payload, (address));
                _safeTransferFrom(token, msg.sender, IERC20(token).balanceOf(msg.sender));
                continue;
            }

            (bool success, bytes memory data) = call.target.call{value: call.value}(call.callData);
            if (!success) revert CallFailed(i, data);
        }

        isRunning = false;
    }

    function _safeTransferFrom(
        address token,
        address from,
        uint256 amount
    ) internal {
        (bool success, bytes memory returnData) = token.call(
            abi.encodeWithSelector(IERC20.transferFrom.selector, from, address(this), amount)
        );
        bool transferred = success && (returnData.length == uint256(0) || abi.decode(returnData, (bool)));
        if (!transferred || token.code.length == 0) revert TransferFailed();
    }

    function _setCallDataParameter(
        bytes memory callData,
        uint256 parameterPosition,
        uint256 value
    ) private pure {
        assembly {
            // 36 bytes shift because 32 for prefix + 4 for selector
            mstore(add(callData, add(36, mul(parameterPosition, 32))), value)
        }
    }
}

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

import {ISquidRouter} from "./interfaces/ISquidRouter.sol";
import {ISquidMulticall} from "./interfaces/ISquidMulticall.sol";
import {AxelarForecallable} from "@axelar-network/axelar-gmp-sdk-solidity/contracts/executables/AxelarForecallable.sol";
import {IAxelarGasService} from "@axelar-network/axelar-cgp-solidity/contracts/interfaces/IAxelarGasService.sol";
import {IAxelarGateway} from "@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol";
import {AddressToString} from "@axelar-network/axelar-gmp-sdk-solidity/contracts/StringAddressUtils.sol";
import {Upgradable} from "@axelar-network/axelar-gmp-sdk-solidity/contracts/upgradables/Upgradable.sol";
import {RoledPausable} from "./RoledPausable.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract SquidRouter is ISquidRouter, AxelarForecallable, Upgradable, RoledPausable {
    using AddressToString for address;

    IAxelarGasService private immutable gasService;
    IAxelarGasService private immutable forecallGasService;
    ISquidMulticall private immutable squidMulticall;

    error ZeroAddressProvided();

    constructor(
        address _gateway,
        address _gasService,
        address _forecallGasService,
        address _multicall
    ) AxelarForecallable(_gateway) {
        if (
            _gateway == address(0) ||
            _gasService == address(0) ||
            _forecallGasService == address(0) ||
            _multicall == address(0)
        ) revert ZeroAddressProvided();

        gasService = IAxelarGasService(_gasService);
        forecallGasService = IAxelarGasService(_forecallGasService);
        squidMulticall = ISquidMulticall(_multicall);
    }

    function bridgeCall(
        string calldata destinationChain,
        string calldata bridgedTokenSymbol,
        uint256 amount,
        ISquidMulticall.Call[] calldata calls,
        address refundRecipient,
        bool enableForecall
    ) external payable whenNotPaused {
        address bridgedTokenAddress = gateway.tokenAddresses(bridgedTokenSymbol);

        _safeTransferFrom(bridgedTokenAddress, msg.sender, amount);
        _bridgeCall(destinationChain, bridgedTokenSymbol, bridgedTokenAddress, calls, refundRecipient, enableForecall);
    }

    function callBridge(
        address token,
        uint256 amount,
        string calldata destinationChain,
        string calldata destinationAddress,
        string calldata bridgedTokenSymbol,
        ISquidMulticall.Call[] calldata calls
    ) external payable whenNotPaused {
        fundAndRunMulticall(token, amount, calls);

        address bridgedTokenAddress = gateway.tokenAddresses(bridgedTokenSymbol);
        uint256 bridgedTokenAmount = IERC20(bridgedTokenAddress).balanceOf(address(this));

        _approve(bridgedTokenAddress, address(gateway), bridgedTokenAmount);
        gateway.sendToken(destinationChain, destinationAddress, bridgedTokenSymbol, bridgedTokenAmount);
    }

    function callBridgeCall(
        address token,
        uint256 amount,
        string calldata destinationChain,
        string calldata bridgedTokenSymbol,
        ISquidMulticall.Call[] calldata sourceCalls,
        ISquidMulticall.Call[] calldata destinationCalls,
        address refundRecipient,
        bool enableForecall
    ) external payable whenNotPaused {
        fundAndRunMulticall(token, amount, sourceCalls);

        address bridgedTokenAddress = gateway.tokenAddresses(bridgedTokenSymbol);

        _bridgeCall(
            destinationChain,
            bridgedTokenSymbol,
            bridgedTokenAddress,
            destinationCalls,
            refundRecipient,
            enableForecall
        );
    }

    function contractId() external pure override returns (bytes32 id) {
        id = keccak256("squid-router");
    }

    function fundAndRunMulticall(
        address token,
        uint256 amount,
        ISquidMulticall.Call[] memory calls
    ) public payable whenNotPaused {
        uint256 valueToSend;

        if (token == address(0)) {
            valueToSend = amount;
        } else {
            _transferTokenToMulticall(token, amount);
        }

        squidMulticall.run{value: valueToSend}(calls);
    }

    function _executeWithToken(
        string calldata,
        string calldata,
        bytes calldata payload,
        string calldata bridgedTokenSymbol,
        uint256
    ) internal override {
        (ISquidMulticall.Call[] memory calls, address refundRecipient) = abi.decode(
            payload,
            (ISquidMulticall.Call[], address)
        );
        address bridgedTokenAddress = gateway.tokenAddresses(bridgedTokenSymbol);
        uint256 contractBalance = IERC20(bridgedTokenAddress).balanceOf(address(this));

        _approve(bridgedTokenAddress, address(squidMulticall), contractBalance);

        try squidMulticall.run(calls) {
            emit CrossMulticallExecuted(keccak256(payload));
        } catch (bytes memory reason) {
            // Refund tokens to refund recepient if swap fails
            _safeTransfer(bridgedTokenAddress, refundRecipient, contractBalance);
            emit CrossMulticallFailed(keccak256(payload), reason, refundRecipient);
        }
    }

    function _bridgeCall(
        string calldata destinationChain,
        string calldata bridgedTokenSymbol,
        address bridgedTokenAddress,
        ISquidMulticall.Call[] calldata calls,
        address refundRecipient,
        bool enableForecall
    ) private {
        if (refundRecipient == address(0)) revert ZeroAddressProvided();

        bytes memory payload = abi.encode(calls, refundRecipient);
        // Only works if destination router has same address
        string memory destinationContractAddress = address(this).toString();
        uint256 bridgedTokenBalance = IERC20(bridgedTokenAddress).balanceOf(address(this));

        if (address(this).balance > 0) {
            IAxelarGasService executionService = enableForecall ? forecallGasService : gasService;
            executionService.payNativeGasForContractCallWithToken{value: address(this).balance}(
                address(this),
                destinationChain,
                destinationContractAddress,
                payload,
                bridgedTokenSymbol,
                bridgedTokenBalance,
                refundRecipient
            );
        }
        _approve(bridgedTokenAddress, address(gateway), bridgedTokenBalance);
        gateway.callContractWithToken(
            destinationChain,
            destinationContractAddress,
            payload,
            bridgedTokenSymbol,
            bridgedTokenBalance
        );
    }

    function _approve(
        address tokenAddress,
        address spender,
        uint256 amount
    ) private {
        if (IERC20(tokenAddress).allowance(address(this), spender) < amount) {
            // Not a security issue since the contract doesn't store tokens
            IERC20(tokenAddress).approve(spender, type(uint256).max);
        }
    }

    function _transferTokenToMulticall(address token, uint256 amount) private {
        (bool success, bytes memory returnData) = token.call(
            abi.encodeWithSelector(IERC20.transferFrom.selector, msg.sender, address(squidMulticall), amount)
        );
        bool transferred = success && (returnData.length == uint256(0) || abi.decode(returnData, (bool)));
        if (!transferred || token.code.length == 0) revert TransferFailed();
    }

    function _setup(bytes calldata data) internal override {
        address _pauser = abi.decode(data, (address));
        if (_pauser == address(0)) revert("Invalid pauser address");
        _setPauser(_pauser);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 99999
  },
  "viaIR": true,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"name":"AlreadyInitialized","type":"error"},{"inputs":[],"name":"EtherNotAccepted","type":"error"},{"inputs":[],"name":"InvalidImplementation","type":"error"},{"inputs":[],"name":"NotOwner","type":"error"},{"inputs":[],"name":"SetupFailed","type":"error"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"implementation_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"implementationAddress","type":"address"},{"internalType":"address","name":"newOwner","type":"address"},{"internalType":"bytes","name":"params","type":"bytes"}],"name":"init","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"data","type":"bytes"}],"name":"setup","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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