@etherspot/contracts/deployments/arbitrumNitro/solcInputs/893c7c8579088197a1acbd2718e7b759.json

Etherspot Solidity contracts

{
  "language": "Solidity",
  "sources": {
    "src/bridges/facets/StargateFacet.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\npragma solidity 0.8.4;\r\n\r\nimport {IStargateRouter} from \"../interfaces/IStargateRouter.sol\";\r\nimport {IStargateReceiver} from \"../interfaces/IStargateReceiver.sol\";\r\nimport {IERC20} from \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\r\nimport {SafeERC20} from \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\r\nimport {ReentrancyGuard} from \"../../common/helpers/DiamondReentrancyGuard.sol\";\r\nimport {CannotBridgeToSameNetwork, InvalidAmount, InvalidConfig} from \"../errors/GenericErrors.sol\";\r\nimport {SenderNotStargateRouter, NoMsgValueForCrossChainMessage, StargateRouterAddressZero, InvalidSourcePoolId, InvalidDestinationPoolId} from \"../errors/StargateErrors.sol\";\r\nimport {LibDiamond} from \"../libs/LibDiamond.sol\";\r\n\r\n/// @title StargateFacet\r\n/// @author Luke Wickens <luke@pillarproject.io>\r\n/// @notice Stargate/LayerZero intergration for bridging tokens\r\n\r\ncontract StargateFacet is IStargateReceiver, ReentrancyGuard {\r\n    using SafeERC20 for IERC20;\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    /////////////////////////// Events ///////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n    event SGInitialized(address stargate, uint16 chainId);\r\n    event SGTransferStarted(\r\n        string bridgeUsed,\r\n        address fromToken,\r\n        address toToken,\r\n        address from,\r\n        address to,\r\n        uint256 amount,\r\n        uint16 chainIdTo\r\n    );\r\n    event SGReceivedOnDestination(address token, uint256 amount);\r\n    event SGUpdatedRouter(address newAddress);\r\n    event SGUpdatedSlippageTolerance(uint256 newSlippage);\r\n    event SGAddedPool(uint16 chainId, address token, uint16 poolId);\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ////////////////////////// Storage ///////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    bytes32 internal constant NAMESPACE =\r\n        keccak256(\"io.etherspot.facets.stargate\");\r\n    struct Storage {\r\n        address stargateRouter;\r\n        uint16 chainId;\r\n        uint256 dstGas;\r\n        uint256 slippage;\r\n        mapping(uint16 => mapping(address => uint16)) poolIds;\r\n    }\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ////////////////////////// Structs ///////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    struct StargateData {\r\n        uint256 qty;\r\n        address fromToken;\r\n        address toToken;\r\n        uint16 dstChainId;\r\n        address to;\r\n        address destStargateComposed;\r\n    }\r\n\r\n    /// @notice initializes state variables for the Stargate facet\r\n    /// @param _stargateRouter - address of the Stargate router contract\r\n    /// @param _chainId - current chain id\r\n    function sgInitialize(address _stargateRouter, uint16 _chainId) external {\r\n        if (_stargateRouter == address(0)) revert InvalidConfig();\r\n        LibDiamond.enforceIsContractOwner();\r\n        Storage storage s = getStorage();\r\n        s.stargateRouter = address(_stargateRouter);\r\n        s.chainId = _chainId;\r\n        s.slippage = 50; // equates to 0.5%\r\n        // Adding pre-existing pools => USDC: 1, USDT: 2, BUSD: 5\r\n        sgAddPool(1, 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48, 1);\r\n        sgAddPool(1, 0xdAC17F958D2ee523a2206206994597C13D831ec7, 2);\r\n        sgAddPool(2, 0x55d398326f99059fF775485246999027B3197955, 2);\r\n        sgAddPool(2, 0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56, 5);\r\n        sgAddPool(6, 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E, 1);\r\n        sgAddPool(6, 0x9702230A8Ea53601f5cD2dc00fDBc13d4dF4A8c7, 2);\r\n        sgAddPool(9, 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174, 1);\r\n        sgAddPool(9, 0xc2132D05D31c914a87C6611C10748AEb04B58e8F, 2);\r\n        sgAddPool(10, 0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8, 1);\r\n        sgAddPool(10, 0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9, 2);\r\n        sgAddPool(11, 0x7F5c764cBc14f9669B88837ca1490cCa17c31607, 1);\r\n        sgAddPool(12, 0x04068DA6C83AFCFA0e13ba15A6696662335D5B75, 1);\r\n        emit SGInitialized(_stargateRouter, _chainId);\r\n    }\r\n\r\n    /// @notice initializes state variables for the stargate facet\r\n    /// @param _sgData - struct containing information required to execute bridge\r\n    function sgBridgeTokens(StargateData memory _sgData)\r\n        external\r\n        payable\r\n        nonReentrant\r\n    {\r\n        // if (msg.value <= 0) revert NoMsgValueForCrossChainMessage();\r\n        if (_sgData.qty <= 0) revert InvalidAmount();\r\n        if (\r\n            _sgData.fromToken == address(0) ||\r\n            _sgData.toToken == address(0) ||\r\n            _sgData.to == address(0) ||\r\n            _sgData.destStargateComposed == address(0)\r\n        ) revert InvalidConfig();\r\n\r\n        // access storage\r\n        Storage storage s = getStorage();\r\n\r\n        // check pool ids are valid\r\n        uint16 srcPoolId = sgRetrievePoolId(s.chainId, _sgData.fromToken);\r\n        if (srcPoolId == 0) revert InvalidSourcePoolId();\r\n        uint16 dstPoolId = sgRetrievePoolId(\r\n            _sgData.dstChainId,\r\n            _sgData.toToken\r\n        );\r\n\r\n        // calculate cross chain fees\r\n        uint256 fees = sgCalculateFees(\r\n            _sgData.dstChainId,\r\n            _sgData.to,\r\n            s.stargateRouter\r\n        );\r\n\r\n        // calculate slippage\r\n        uint256 minAmountOut = sgMinAmountOut(_sgData.qty);\r\n\r\n        // encode sgReceive implemented\r\n        bytes memory destination = abi.encodePacked(\r\n            _sgData.destStargateComposed\r\n        );\r\n\r\n        // encode payload data to send to destination contract, which it will handle with sgReceive()\r\n        bytes memory payload = abi.encode(_sgData.to);\r\n\r\n        // this contract calls stargate swap()\r\n        IERC20(_sgData.fromToken).safeTransferFrom(\r\n            msg.sender,\r\n            address(this),\r\n            _sgData.qty\r\n        );\r\n\r\n        IERC20(_sgData.fromToken).safeApprove(\r\n            address(s.stargateRouter),\r\n            _sgData.qty\r\n        );\r\n\r\n        // Stargate's Router.swap() function sends the tokens to the destination chain.\r\n        IStargateRouter(s.stargateRouter).swap{value: fees}(\r\n            _sgData.dstChainId, // the destination chain id\r\n            srcPoolId, // the source Stargate poolId\r\n            dstPoolId, // the destination Stargate poolId\r\n            payable(msg.sender), // refund adddress. if msg.sender pays too much gas, return extra eth\r\n            _sgData.qty, // total tokens to send to destination chain\r\n            minAmountOut, // min amount allowed out\r\n            IStargateRouter.lzTxObj(200000, 0, \"0x\"), // default lzTxObj\r\n            destination, // destination address, the sgReceive() implementer\r\n            payload // bytes payload\r\n        );\r\n\r\n        emit SGTransferStarted(\r\n            \"stargate\",\r\n            _sgData.fromToken,\r\n            _sgData.toToken,\r\n            msg.sender,\r\n            _sgData.to,\r\n            _sgData.qty,\r\n            _sgData.dstChainId\r\n        );\r\n    }\r\n\r\n    /// @notice required to receive tokens on destination chain\r\n    /// @param _chainId The remote chainId sending the tokens\r\n    /// @param _srcAddress The remote Bridge address\r\n    /// @param _nonce The message ordering nonce\r\n    /// @param _token The token contract on the local chain\r\n    /// @param amountLD The qty of local _token contract tokens\r\n    /// @param _payload The bytes containing the toAddress\r\n    function sgReceive(\r\n        uint16 _chainId,\r\n        bytes memory _srcAddress,\r\n        uint256 _nonce,\r\n        address _token,\r\n        uint256 amountLD,\r\n        bytes memory _payload\r\n    ) external override {\r\n        Storage storage s = getStorage();\r\n        if (msg.sender != address(s.stargateRouter))\r\n            revert SenderNotStargateRouter();\r\n\r\n        address _toAddr = abi.decode(_payload, (address));\r\n        IERC20(_token).transfer(_toAddr, amountLD);\r\n        emit SGReceivedOnDestination(_token, amountLD);\r\n    }\r\n\r\n    /// @notice Calculates cross chain fee\r\n    /// @param _destChain Destination chain id\r\n    /// @param _receiver Receiver on destination chain\r\n    /// @param _router Address of stargate router\r\n    function sgCalculateFees(\r\n        uint16 _destChain,\r\n        address _receiver,\r\n        address _router\r\n    ) public view returns (uint256) {\r\n        (uint256 nativeFee, ) = IStargateRouter(_router).quoteLayerZeroFee(\r\n            _destChain, // destination chain id\r\n            1, // 1 = swap\r\n            abi.encodePacked(_receiver), // receiver on destination chain\r\n            \"0x\", // payload, using abi.encode()\r\n            IStargateRouter.lzTxObj(200000, 0, \"0x\")\r\n        );\r\n        return nativeFee;\r\n    }\r\n\r\n    /// @notice Calculates the minimum amount out using slippage tolerance\r\n    /// @param _amount Transfer amount\r\n    function sgMinAmountOut(uint256 _amount) public view returns (uint256) {\r\n        Storage storage s = getStorage();\r\n        // equates to 0.5% slippage\r\n        return (_amount * (10000 - s.slippage)) / (10000);\r\n    }\r\n\r\n    /// @notice Updates stargate router address for deployed chain\r\n    /// @param _newAddress Address of the new router\r\n    function sgUpdateRouter(address _newAddress) external {\r\n        LibDiamond.enforceIsContractOwner();\r\n        if (_newAddress == address(0)) revert StargateRouterAddressZero();\r\n        Storage storage s = getStorage();\r\n        s.stargateRouter = address(_newAddress);\r\n        emit SGUpdatedRouter(_newAddress);\r\n    }\r\n\r\n    /// @notice Updates slippage tolerance amount\r\n    /// @param _newSlippage New slippage amount\r\n    function sgUpdateSlippageTolerance(uint256 _newSlippage) external {\r\n        LibDiamond.enforceIsContractOwner();\r\n        Storage storage s = getStorage();\r\n        s.slippage = _newSlippage;\r\n        emit SGUpdatedSlippageTolerance(_newSlippage);\r\n    }\r\n\r\n    /// @notice Adds a new pool for a specific token and chain\r\n    /// @param _chainId Chain id of new pool (NOT actual chain id - check stargate pool ids docs)\r\n    /// @param _token Address of token\r\n    /// @param _poolId Pool id (check stargate pool ids docs)\r\n    function sgAddPool(\r\n        uint16 _chainId,\r\n        address _token,\r\n        uint16 _poolId\r\n    ) public {\r\n        LibDiamond.enforceIsContractOwner();\r\n        Storage storage s = getStorage();\r\n        s.poolIds[_chainId][_token] = _poolId;\r\n        emit SGAddedPool(_chainId, _token, _poolId);\r\n    }\r\n\r\n    /// @notice Checks for a valid token pool on specific chain\r\n    /// @param _chainId Chain id of new pool (NOT actual chain id - check stargate pool ids docs)\r\n    /// @param _token Address of token\r\n    /// @param _poolId Pool id (check stargate pool ids docs)\r\n    function sgCheckPoolId(\r\n        uint16 _chainId,\r\n        address _token,\r\n        uint16 _poolId\r\n    ) external view returns (bool) {\r\n        Storage storage s = getStorage();\r\n        return s.poolIds[_chainId][_token] == _poolId ? true : false;\r\n    }\r\n\r\n    /// @notice Retrieves pool id for a token on a specified chain\r\n    /// @param _chainId Chain id of new pool (NOT actual chain id - check stargate pool ids docs)\r\n    /// @param _token Address of token\r\n    function sgRetrievePoolId(uint16 _chainId, address _token)\r\n        public\r\n        view\r\n        returns (uint16)\r\n    {\r\n        Storage storage s = getStorage();\r\n        return s.poolIds[_chainId][_token];\r\n    }\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ////////////////////// Private Functions /////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    /// @dev fetch local storage\r\n    function getStorage() private pure returns (Storage storage s) {\r\n        bytes32 namespace = NAMESPACE;\r\n        // solhint-disable-next-line no-inline-assembly\r\n        assembly {\r\n            s.slot := namespace\r\n        }\r\n    }\r\n}\r\n"
    },
    "src/bridges/interfaces/IStargateRouter.sol": {
      "content": "// SPDX-License-Identifier:MIT\r\n\r\npragma solidity 0.8.4;\r\npragma abicoder v2;\r\n\r\ninterface IStargateRouter {\r\n    struct lzTxObj {\r\n        uint256 dstGasForCall;\r\n        uint256 dstNativeAmount;\r\n        bytes dstNativeAddr;\r\n    }\r\n\r\n    function addLiquidity(\r\n        uint256 _poolId,\r\n        uint256 _amountLD,\r\n        address _to\r\n    ) external;\r\n\r\n    function swap(\r\n        uint16 _dstChainId,\r\n        uint256 _srcPoolId,\r\n        uint256 _dstPoolId,\r\n        address payable _refundAddress,\r\n        uint256 _amountLD,\r\n        uint256 _minAmountLD,\r\n        lzTxObj memory _lzTxParams,\r\n        bytes calldata _to,\r\n        bytes calldata _payload\r\n    ) external payable;\r\n\r\n    function redeemRemote(\r\n        uint16 _dstChainId,\r\n        uint256 _srcPoolId,\r\n        uint256 _dstPoolId,\r\n        address payable _refundAddress,\r\n        uint256 _amountLP,\r\n        uint256 _minAmountLD,\r\n        bytes calldata _to,\r\n        lzTxObj memory _lzTxParams\r\n    ) external payable;\r\n\r\n    function instantRedeemLocal(\r\n        uint16 _srcPoolId,\r\n        uint256 _amountLP,\r\n        address _to\r\n    ) external returns (uint256);\r\n\r\n    function redeemLocal(\r\n        uint16 _dstChainId,\r\n        uint256 _srcPoolId,\r\n        uint256 _dstPoolId,\r\n        address payable _refundAddress,\r\n        uint256 _amountLP,\r\n        bytes calldata _to,\r\n        lzTxObj memory _lzTxParams\r\n    ) external payable;\r\n\r\n    function sendCredits(\r\n        uint16 _dstChainId,\r\n        uint256 _srcPoolId,\r\n        uint256 _dstPoolId,\r\n        address payable _refundAddress\r\n    ) external payable;\r\n\r\n    function quoteLayerZeroFee(\r\n        uint16 _dstChainId,\r\n        uint8 _functionType,\r\n        bytes calldata _toAddress,\r\n        bytes calldata _transferAndCallPayload,\r\n        lzTxObj memory _lzTxParams\r\n    ) external view returns (uint256, uint256);\r\n}\r\n"
    },
    "src/bridges/interfaces/IStargateReceiver.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\n\r\npragma solidity 0.8.4;\r\n\r\ninterface IStargateReceiver {\r\n    function sgReceive(\r\n        uint16 _srcChainId, // the remote chainId sending the tokens\r\n        bytes memory _srcAddress, // the remote Bridge address\r\n        uint256 _nonce,\r\n        address _token, // the token contract on the local chain\r\n        uint256 amountLD, // the qty of local _token contract tokens\r\n        bytes memory payload\r\n    ) external;\r\n}\r\n"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `from` to `to` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 amount\n    ) external returns (bool);\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n    using Address for address;\n\n    function safeTransfer(\n        IERC20 token,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    function safeTransferFrom(\n        IERC20 token,\n        address from,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    /**\n     * @dev Deprecated. This function has issues similar to the ones found in\n     * {IERC20-approve}, and its usage is discouraged.\n     *\n     * Whenever possible, use {safeIncreaseAllowance} and\n     * {safeDecreaseAllowance} instead.\n     */\n    function safeApprove(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        // safeApprove should only be called when setting an initial allowance,\n        // or when resetting it to zero. To increase and decrease it, use\n        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n        require(\n            (value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    function safeIncreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        uint256 newAllowance = token.allowance(address(this), spender) + value;\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n    }\n\n    function safeDecreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n            uint256 newAllowance = oldAllowance - value;\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n        }\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     */\n    function _callOptionalReturn(IERC20 token, bytes memory data) private {\n        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n        // the target address contains contract code and also asserts for success in the low-level call.\n\n        bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n        if (returndata.length > 0) {\n            // Return data is optional\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n        }\n    }\n}\n"
    },
    "src/common/helpers/DiamondReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: UNLICENSED\r\npragma solidity 0.8.4;\r\n\r\n/// @title Reentrancy Guard\r\n/// @notice Abstract contract to provide protection against reentrancy\r\nabstract contract ReentrancyGuard {\r\n    //////////////////////////////////////////////////////////////\r\n    ////////////////////////// Storage ///////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    bytes32 private constant NAMESPACE =\r\n        keccak256(\"io.etherspot.helpers.reentrancyguard\");\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ////////////////////////// Structs ///////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    struct ReentrancyStorage {\r\n        uint256 status;\r\n    }\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ////////////////////////// Errors ////////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    error ReentrancyError();\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ///////////////////////// Constants //////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    uint256 private constant _NOT_ENTERED = 0;\r\n    uint256 private constant _ENTERED = 1;\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ///////////////////////// Modifiers ///////////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    modifier nonReentrant() {\r\n        ReentrancyStorage storage s = reentrancyStorage();\r\n        if (s.status == _ENTERED) revert ReentrancyError();\r\n        s.status = _ENTERED;\r\n        _;\r\n        s.status = _NOT_ENTERED;\r\n    }\r\n\r\n    //////////////////////////////////////////////////////////////\r\n    ////////////////////// Private Functions /////////////////////\r\n    //////////////////////////////////////////////////////////////\r\n\r\n    /// @dev fetch local storage\r\n    function reentrancyStorage()\r\n        private\r\n        pure\r\n        returns (ReentrancyStorage storage data)\r\n    {\r\n        bytes32 position = NAMESPACE;\r\n        // solhint-disable-next-line no-inline-assembly\r\n        assembly {\r\n            data.slot := position\r\n        }\r\n    }\r\n}\r\n"
    },
    "src/bridges/errors/GenericErrors.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\n// solhint-disable-next-line\r\npragma solidity 0.8.4;\r\n\r\nerror InvalidAmount();\r\nerror TokenAddressIsZero();\r\nerror CannotBridgeToSameNetwork();\r\nerror ZeroPostSwapBalance();\r\nerror InvalidBridgeConfigLength();\r\nerror NoSwapDataProvided();\r\nerror NativeValueWithERC();\r\nerror ContractCallNotAllowed();\r\nerror NullAddrIsNotAValidSpender();\r\nerror NullAddrIsNotAnERC20Token();\r\nerror NoTransferToNullAddress();\r\nerror NativeAssetTransferFailed();\r\nerror InvalidContract();\r\nerror InvalidConfig();\r\nerror ZeroAddressProvided();\r\n"
    },
    "src/bridges/errors/StargateErrors.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\n// solhint-disable-next-line\r\npragma solidity 0.8.4;\r\n\r\nerror SenderNotStargateRouter();\r\nerror NoMsgValueForCrossChainMessage();\r\nerror StargateRouterAddressZero();\r\nerror InvalidSourcePoolId();\r\nerror InvalidDestinationPoolId();\r\n"
    },
    "src/bridges/libs/LibDiamond.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\npragma solidity >=0.8.4 <0.9.0;\r\n\r\nimport {IDiamondCut} from \"../interfaces/IDiamondCut.sol\";\r\n\r\nlibrary LibDiamond {\r\n    bytes32 internal constant DIAMOND_STORAGE_POSITION =\r\n        keccak256(\"diamond.standard.diamond.storage\");\r\n\r\n    struct FacetAddressAndPosition {\r\n        address facetAddress;\r\n        uint96 functionSelectorPosition; // position in facetFunctionSelectors.functionSelectors array\r\n    }\r\n\r\n    struct FacetFunctionSelectors {\r\n        bytes4[] functionSelectors;\r\n        uint256 facetAddressPosition; // position of facetAddress in facetAddresses array\r\n    }\r\n\r\n    struct DiamondStorage {\r\n        // maps function selector to the facet address and\r\n        // the position of the selector in the facetFunctionSelectors.selectors array\r\n        mapping(bytes4 => FacetAddressAndPosition) selectorToFacetAndPosition;\r\n        // maps facet addresses to function selectors\r\n        mapping(address => FacetFunctionSelectors) facetFunctionSelectors;\r\n        // facet addresses\r\n        address[] facetAddresses;\r\n        // Used to query if a contract implements an interface.\r\n        // Used to implement ERC-165.\r\n        mapping(bytes4 => bool) supportedInterfaces;\r\n        // owner of the contract\r\n        address contractOwner;\r\n    }\r\n\r\n    function diamondStorage()\r\n        internal\r\n        pure\r\n        returns (DiamondStorage storage ds)\r\n    {\r\n        bytes32 position = DIAMOND_STORAGE_POSITION;\r\n        // solhint-disable-next-line no-inline-assembly\r\n        assembly {\r\n            ds.slot := position\r\n        }\r\n    }\r\n\r\n    event OwnershipTransferred(\r\n        address indexed previousOwner,\r\n        address indexed newOwner\r\n    );\r\n\r\n    function setContractOwner(address _newOwner) internal {\r\n        DiamondStorage storage ds = diamondStorage();\r\n        address previousOwner = ds.contractOwner;\r\n        ds.contractOwner = _newOwner;\r\n        emit OwnershipTransferred(previousOwner, _newOwner);\r\n    }\r\n\r\n    function contractOwner() internal view returns (address contractOwner_) {\r\n        contractOwner_ = diamondStorage().contractOwner;\r\n    }\r\n\r\n    function enforceIsContractOwner() internal view {\r\n        require(\r\n            msg.sender == diamondStorage().contractOwner,\r\n            \"LibDiamond: Must be contract owner\"\r\n        );\r\n    }\r\n\r\n    event DiamondCut(\r\n        IDiamondCut.FacetCut[] _diamondCut,\r\n        address _init,\r\n        bytes _calldata\r\n    );\r\n\r\n    // Internal function version of diamondCut\r\n    function diamondCut(\r\n        IDiamondCut.FacetCut[] memory _diamondCut,\r\n        address _init,\r\n        bytes memory _calldata\r\n    ) internal {\r\n        for (\r\n            uint256 facetIndex;\r\n            facetIndex < _diamondCut.length;\r\n            facetIndex++\r\n        ) {\r\n            IDiamondCut.FacetCutAction action = _diamondCut[facetIndex].action;\r\n            if (action == IDiamondCut.FacetCutAction.Add) {\r\n                addFunctions(\r\n                    _diamondCut[facetIndex].facetAddress,\r\n                    _diamondCut[facetIndex].functionSelectors\r\n                );\r\n            } else if (action == IDiamondCut.FacetCutAction.Replace) {\r\n                replaceFunctions(\r\n                    _diamondCut[facetIndex].facetAddress,\r\n                    _diamondCut[facetIndex].functionSelectors\r\n                );\r\n            } else if (action == IDiamondCut.FacetCutAction.Remove) {\r\n                removeFunctions(\r\n                    _diamondCut[facetIndex].facetAddress,\r\n                    _diamondCut[facetIndex].functionSelectors\r\n                );\r\n            } else {\r\n                revert(\"LibDiamondCut: Incorrect FacetCutAction\");\r\n            }\r\n        }\r\n        emit DiamondCut(_diamondCut, _init, _calldata);\r\n        initializeDiamondCut(_init, _calldata);\r\n    }\r\n\r\n    function addFunctions(\r\n        address _facetAddress,\r\n        bytes4[] memory _functionSelectors\r\n    ) internal {\r\n        require(\r\n            _functionSelectors.length > 0,\r\n            \"LibDiamondCut: No selectors in facet to cut\"\r\n        );\r\n        DiamondStorage storage ds = diamondStorage();\r\n        require(\r\n            _facetAddress != address(0),\r\n            \"LibDiamondCut: Add facet can't be address(0)\"\r\n        );\r\n        uint96 selectorPosition = uint96(\r\n            ds.facetFunctionSelectors[_facetAddress].functionSelectors.length\r\n        );\r\n        // add new facet address if it does not exist\r\n        if (selectorPosition == 0) {\r\n            addFacet(ds, _facetAddress);\r\n        }\r\n        for (\r\n            uint256 selectorIndex;\r\n            selectorIndex < _functionSelectors.length;\r\n            selectorIndex++\r\n        ) {\r\n            bytes4 selector = _functionSelectors[selectorIndex];\r\n            address oldFacetAddress = ds\r\n                .selectorToFacetAndPosition[selector]\r\n                .facetAddress;\r\n            require(\r\n                oldFacetAddress == address(0),\r\n                \"LibDiamondCut: Can't add function that already exists\"\r\n            );\r\n            addFunction(ds, selector, selectorPosition, _facetAddress);\r\n            selectorPosition++;\r\n        }\r\n    }\r\n\r\n    function replaceFunctions(\r\n        address _facetAddress,\r\n        bytes4[] memory _functionSelectors\r\n    ) internal {\r\n        require(\r\n            _functionSelectors.length > 0,\r\n            \"LibDiamondCut: No selectors in facet to cut\"\r\n        );\r\n        DiamondStorage storage ds = diamondStorage();\r\n        require(\r\n            _facetAddress != address(0),\r\n            \"LibDiamondCut: Add facet can't be address(0)\"\r\n        );\r\n        uint96 selectorPosition = uint96(\r\n            ds.facetFunctionSelectors[_facetAddress].functionSelectors.length\r\n        );\r\n        // add new facet address if it does not exist\r\n        if (selectorPosition == 0) {\r\n            addFacet(ds, _facetAddress);\r\n        }\r\n        for (\r\n            uint256 selectorIndex;\r\n            selectorIndex < _functionSelectors.length;\r\n            selectorIndex++\r\n        ) {\r\n            bytes4 selector = _functionSelectors[selectorIndex];\r\n            address oldFacetAddress = ds\r\n                .selectorToFacetAndPosition[selector]\r\n                .facetAddress;\r\n            require(\r\n                oldFacetAddress != _facetAddress,\r\n                \"LibDiamondCut: Can't replace function with same function\"\r\n            );\r\n            removeFunction(ds, oldFacetAddress, selector);\r\n            addFunction(ds, selector, selectorPosition, _facetAddress);\r\n            selectorPosition++;\r\n        }\r\n    }\r\n\r\n    function removeFunctions(\r\n        address _facetAddress,\r\n        bytes4[] memory _functionSelectors\r\n    ) internal {\r\n        require(\r\n            _functionSelectors.length > 0,\r\n            \"LibDiamondCut: No selectors in facet to cut\"\r\n        );\r\n        DiamondStorage storage ds = diamondStorage();\r\n        // if function does not exist then do nothing and return\r\n        require(\r\n            _facetAddress == address(0),\r\n            \"LibDiamondCut: Remove facet address must be address(0)\"\r\n        );\r\n        for (\r\n            uint256 selectorIndex;\r\n            selectorIndex < _functionSelectors.length;\r\n            selectorIndex++\r\n        ) {\r\n            bytes4 selector = _functionSelectors[selectorIndex];\r\n            address oldFacetAddress = ds\r\n                .selectorToFacetAndPosition[selector]\r\n                .facetAddress;\r\n            removeFunction(ds, oldFacetAddress, selector);\r\n        }\r\n    }\r\n\r\n    function addFacet(DiamondStorage storage ds, address _facetAddress)\r\n        internal\r\n    {\r\n        enforceHasContractCode(\r\n            _facetAddress,\r\n            \"LibDiamondCut: New facet has no code\"\r\n        );\r\n        ds.facetFunctionSelectors[_facetAddress].facetAddressPosition = ds\r\n            .facetAddresses\r\n            .length;\r\n        ds.facetAddresses.push(_facetAddress);\r\n    }\r\n\r\n    function addFunction(\r\n        DiamondStorage storage ds,\r\n        bytes4 _selector,\r\n        uint96 _selectorPosition,\r\n        address _facetAddress\r\n    ) internal {\r\n        ds\r\n            .selectorToFacetAndPosition[_selector]\r\n            .functionSelectorPosition = _selectorPosition;\r\n        ds.facetFunctionSelectors[_facetAddress].functionSelectors.push(\r\n            _selector\r\n        );\r\n        ds.selectorToFacetAndPosition[_selector].facetAddress = _facetAddress;\r\n    }\r\n\r\n    function removeFunction(\r\n        DiamondStorage storage ds,\r\n        address _facetAddress,\r\n        bytes4 _selector\r\n    ) internal {\r\n        require(\r\n            _facetAddress != address(0),\r\n            \"LibDiamondCut: Can't remove function that doesn't exist\"\r\n        );\r\n        // an immutable function is a function defined directly in a diamond\r\n        require(\r\n            _facetAddress != address(this),\r\n            \"LibDiamondCut: Can't remove immutable function\"\r\n        );\r\n        // replace selector with last selector, then delete last selector\r\n        uint256 selectorPosition = ds\r\n            .selectorToFacetAndPosition[_selector]\r\n            .functionSelectorPosition;\r\n        uint256 lastSelectorPosition = ds\r\n            .facetFunctionSelectors[_facetAddress]\r\n            .functionSelectors\r\n            .length - 1;\r\n        // if not the same then replace _selector with lastSelector\r\n        if (selectorPosition != lastSelectorPosition) {\r\n            bytes4 lastSelector = ds\r\n                .facetFunctionSelectors[_facetAddress]\r\n                .functionSelectors[lastSelectorPosition];\r\n            ds.facetFunctionSelectors[_facetAddress].functionSelectors[\r\n                    selectorPosition\r\n                ] = lastSelector;\r\n            ds\r\n                .selectorToFacetAndPosition[lastSelector]\r\n                .functionSelectorPosition = uint96(selectorPosition);\r\n        }\r\n        // delete the last selector\r\n        ds.facetFunctionSelectors[_facetAddress].functionSelectors.pop();\r\n        delete ds.selectorToFacetAndPosition[_selector];\r\n\r\n        // if no more selectors for facet address then delete the facet address\r\n        if (lastSelectorPosition == 0) {\r\n            // replace facet address with last facet address and delete last facet address\r\n            uint256 lastFacetAddressPosition = ds.facetAddresses.length - 1;\r\n            uint256 facetAddressPosition = ds\r\n                .facetFunctionSelectors[_facetAddress]\r\n                .facetAddressPosition;\r\n            if (facetAddressPosition != lastFacetAddressPosition) {\r\n                address lastFacetAddress = ds.facetAddresses[\r\n                    lastFacetAddressPosition\r\n                ];\r\n                ds.facetAddresses[facetAddressPosition] = lastFacetAddress;\r\n                ds\r\n                    .facetFunctionSelectors[lastFacetAddress]\r\n                    .facetAddressPosition = facetAddressPosition;\r\n            }\r\n            ds.facetAddresses.pop();\r\n            delete ds\r\n                .facetFunctionSelectors[_facetAddress]\r\n                .facetAddressPosition;\r\n        }\r\n    }\r\n\r\n    function initializeDiamondCut(address _init, bytes memory _calldata)\r\n        internal\r\n    {\r\n        if (_init == address(0)) {\r\n            require(\r\n                _calldata.length == 0,\r\n                \"LibDiamondCut: _init is address(0) but_calldata is not empty\"\r\n            );\r\n        } else {\r\n            require(\r\n                _calldata.length > 0,\r\n                \"LibDiamondCut: _calldata is empty but _init is not address(0)\"\r\n            );\r\n            if (_init != address(this)) {\r\n                enforceHasContractCode(\r\n                    _init,\r\n                    \"LibDiamondCut: _init address has no code\"\r\n                );\r\n            }\r\n            // solhint-disable-next-line avoid-low-level-calls\r\n            (bool success, bytes memory error) = _init.delegatecall(_calldata);\r\n            if (!success) {\r\n                if (error.length > 0) {\r\n                    // bubble up the error\r\n                    revert(string(error));\r\n                } else {\r\n                    revert(\"LibDiamondCut: _init function reverted\");\r\n                }\r\n            }\r\n        }\r\n    }\r\n\r\n    function enforceHasContractCode(\r\n        address _contract,\r\n        string memory _errorMessage\r\n    ) internal view {\r\n        uint256 contractSize;\r\n        // solhint-disable-next-line no-inline-assembly\r\n        assembly {\r\n            contractSize := extcodesize(_contract)\r\n        }\r\n        require(contractSize > 0, _errorMessage);\r\n    }\r\n}\r\n"
    },
    "@openzeppelin/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    },
    "src/bridges/interfaces/IDiamondCut.sol": {
      "content": "// SPDX-License-Identifier: MIT\r\npragma solidity >=0.8.4 <0.9.0;\r\n\r\ninterface IDiamondCut {\r\n    enum FacetCutAction {\r\n        Add,\r\n        Replace,\r\n        Remove\r\n    }\r\n    // Add=0, Replace=1, Remove=2\r\n\r\n    struct FacetCut {\r\n        address facetAddress;\r\n        FacetCutAction action;\r\n        bytes4[] functionSelectors;\r\n    }\r\n\r\n    /// @notice Add/replace/remove any number of functions and optionally execute\r\n    ///         a function with delegatecall\r\n    /// @param _diamondCut Contains the facet addresses and function selectors\r\n    /// @param _init The address of the contract or facet to execute _calldata\r\n    /// @param _calldata A function call, including function selector and arguments\r\n    ///                  _calldata is executed with delegatecall on _init\r\n    function diamondCut(\r\n        FacetCut[] calldata _diamondCut,\r\n        address _init,\r\n        bytes calldata _calldata\r\n    ) external;\r\n\r\n    event DiamondCut(FacetCut[] _diamondCut, address _init, bytes _calldata);\r\n}\r\n"
    },
    "src/bridges/libs/LibAsset.sol": {
      "content": "// SPDX-License-Identifier: UNLICENSED\r\n// solhint-disable-next-line\r\npragma solidity 0.8.4;\r\nimport {NullAddrIsNotAnERC20Token, NullAddrIsNotAValidSpender, NoTransferToNullAddress, InvalidAmount, NativeValueWithERC, NativeAssetTransferFailed} from \"../errors/GenericErrors.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\r\n\r\n/// @title LibAsset\r\n/// @author Connext <support@connext.network>\r\n/// @notice This library contains helpers for dealing with onchain transfers\r\n///         of assets, including accounting for the native asset `assetId`\r\n///         conventions and any noncompliant ERC20 transfers\r\nlibrary LibAsset {\r\n    uint256 private constant MAX_INT = type(uint256).max;\r\n\r\n    addre