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

import "./interfaces/IFeeManager.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

contract FulfillHelper {

	using SafeERC20 for IERC20;

	address public guardian;
	address public nextGuardian;
	mapping(address => bool) public swapProtocols;
	mapping(address => bool) public mayanProtocols;

	error UnsupportedProtocol();

	struct PermitParams {
		uint256 value;
		uint256 deadline;
		uint8 v;
		bytes32 r;
		bytes32 s;
	}

	constructor(address _guardian, address[] memory _swapProtocols, address[] memory _mayanProtocols) {
		guardian = _guardian;
		for (uint256 i = 0; i < _swapProtocols.length; i++) {
			swapProtocols[_swapProtocols[i]] = true;
		}
		for (uint256 i = 0; i < _mayanProtocols.length; i++) {
			mayanProtocols[_mayanProtocols[i]] = true;
		}
	}

	function directFulfill(
		address tokenIn,
		uint256 amountIn,
		address mayanProtocol,
		bytes calldata mayanData,
		PermitParams calldata permitParams
	) external payable {
		if (!mayanProtocols[mayanProtocol]) {
			revert UnsupportedProtocol();
		}
		pullTokenIn(tokenIn, amountIn, permitParams);
		maxApproveIfNeeded(tokenIn, mayanProtocol, amountIn);

		(bool success, bytes memory returnedData) = mayanProtocol.call{value: msg.value}(mayanData);
		if (!success) {
			if (returnedData.length > 0) {
				assembly {
					let returndata_size := mload(returnedData)
					revert(add(32, returnedData), returndata_size)
				}
			} else {
				revert('Mayan protocol call failed');
			}
		}
	}

	function fulfillWithEth(
		uint256 amountIn,
		address fulfillToken,
		address swapProtocol,
		bytes calldata swapData,
		address mayanProtocol,
		bytes calldata mayanData
	) external payable {
		if (!swapProtocols[swapProtocol] || !mayanProtocols[mayanProtocol]) {
			revert UnsupportedProtocol();
		}
		require(fulfillToken != address(0), 'Invalid fulfill token');
		require(msg.value >= amountIn, 'Insufficient input value');
		uint256 fulfillAmount = IERC20(fulfillToken).balanceOf(address(this));
		(bool success, bytes memory returnedData) = swapProtocol.call{value: amountIn}(swapData);
		if (!success) {
			if (returnedData.length > 0) {
				assembly {
					let returndata_size := mload(returnedData)
					revert(add(32, returnedData), returndata_size)
				}
			} else {
				revert('Swap protocol call failed');
			}
		}

		fulfillAmount = IERC20(fulfillToken).balanceOf(address(this)) - fulfillAmount;

		bytes memory modifiedData = replaceFulfillAmount(mayanData, fulfillAmount);
		maxApproveIfNeeded(fulfillToken, mayanProtocol, fulfillAmount);
		(success, returnedData) = mayanProtocol.call{value: msg.value - amountIn}(modifiedData);
		if (!success) {
			if (returnedData.length > 0) {
				assembly {
					let returndata_size := mload(returnedData)
					revert(add(32, returnedData), returndata_size)
				}
			} else {
				revert('Mayan protocol call failed');
			}
		}
	} 

	function fulfillWithERC20(
		address tokenIn,
		uint256 amountIn,
		address fulfillToken,
		address swapProtocol,
		bytes calldata swapData,
		address mayanProtocol,
		bytes calldata mayanData,
		PermitParams calldata permitParams
	) external payable {
		if (!swapProtocols[swapProtocol] || !mayanProtocols[mayanProtocol]) {
			revert UnsupportedProtocol();
		}
		pullTokenIn(tokenIn, amountIn, permitParams);
		maxApproveIfNeeded(tokenIn, swapProtocol, amountIn);

		uint256 fulfillAmount;
		if (fulfillToken == address(0)) {
			fulfillAmount = address(this).balance;
		} else {
			fulfillAmount = IERC20(fulfillToken).balanceOf(address(this));
		}

		(bool success, bytes memory returnedData) = swapProtocol.call(swapData);
		if (!success) {
			if (returnedData.length > 0) {
				assembly {
					let returndata_size := mload(returnedData)
					revert(add(32, returnedData), returndata_size)
				}
			} else {
				revert('Swap protocol call failed');
			}
		}

		transferBackRemaining(tokenIn, amountIn);

		if (fulfillToken == address(0)) {
			fulfillAmount = address(this).balance - fulfillAmount;
		} else {
			fulfillAmount = IERC20(fulfillToken).balanceOf(address(this)) - fulfillAmount;
		}

		bytes memory modifiedData = replaceFulfillAmount(mayanData, fulfillAmount);
		if (fulfillToken == address(0)) {
			(success, returnedData) = mayanProtocol.call{value: msg.value + fulfillAmount}(modifiedData);
		} else {
			maxApproveIfNeeded(fulfillToken, mayanProtocol, fulfillAmount);
			(success, returnedData) = mayanProtocol.call{value: msg.value}(modifiedData);
		}
		if (!success) {
			if (returnedData.length > 0) {
				assembly {
					let returndata_size := mload(returnedData)
					revert(add(32, returnedData), returndata_size)
				}
			} else {
				revert('Mayan protocol call failed');
			}
		}		
	}

	function replaceFulfillAmount(bytes calldata mayanData, uint256 fulfillAmount) internal pure returns(bytes memory) {
		require(mayanData.length >= 36, "Mayan data too short");
		bytes memory modifiedData = new bytes(mayanData.length);

		// Copy the function selector
		for (uint i = 0; i < 4; i++) {
			modifiedData[i] = mayanData[i];
		}

		// Encode the amount and place it into the modified call data
		// Starting from byte 4 to byte 35 (32 bytes for uint256)
		bytes memory encodedAmount = abi.encode(fulfillAmount);
		for (uint i = 0; i < 32; i++) {
			modifiedData[i + 4] = encodedAmount[i];
		}

		// Copy the rest of the original data after the first argument
		for (uint i = 36; i < mayanData.length; i++) {
			modifiedData[i] = mayanData[i];
		}

		return modifiedData;
	}	

	function transferBackRemaining(address token, uint256 maxAmount) internal {
		uint256 remaining = IERC20(token).balanceOf(address(this));
		if (remaining > 0 && remaining <= maxAmount) {
			IERC20(token).safeTransfer(msg.sender, remaining);
		}
	}

	function maxApproveIfNeeded(address tokenAddr, address spender, uint256 amount) internal {
		IERC20 token = IERC20(tokenAddr);
		uint256 currentAllowance = token.allowance(address(this), spender);

		if (currentAllowance < amount) {
			token.safeApprove(spender, 0);
			token.safeApprove(spender, type(uint256).max);
		}
	}

  	function pullTokenIn(
		address tokenIn,
		uint256 amountIn,
		PermitParams calldata permitParams
	) internal {
		uint256 allowance = IERC20(tokenIn).allowance(msg.sender, address(this));
		if (allowance < amountIn) {
			execPermit(tokenIn, msg.sender, permitParams);
		}
		IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), amountIn);
	}    

	function execPermit(
		address token,
		address owner,
		PermitParams calldata permitParams
	) internal {
		IERC20Permit(token).permit(
			owner,
			address(this),
			permitParams.value,
			permitParams.deadline,
			permitParams.v,
			permitParams.r,
			permitParams.s
		);
	}

	function rescueToken(address token, uint256 amount, address to) public {
		require(msg.sender == guardian, 'only guardian');
		IERC20(token).safeTransfer(to, amount);
	}

	function rescueEth(uint256 amount, address payable to) public {
		require(msg.sender == guardian, 'only guardian');
		require(to != address(0), 'transfer to the zero address');
		to.transfer(amount);
	}

	function changeGuardian(address newGuardian) public {
		require(msg.sender == guardian, 'only guardian');
		nextGuardian = newGuardian;
	}

	function claimGuardian() public {
		require(msg.sender == nextGuardian, 'only next guardian');
		guardian = nextGuardian;
	}

	function setSwapProtocol(address swapProtocol, bool enabled) public {
		require(msg.sender == guardian, 'only guardian');
		swapProtocols[swapProtocol] = enabled;
	}

	function setMayanProtocol(address mayanProtocol, bool enabled) public {
		require(msg.sender == guardian, 'only guardian');
		mayanProtocols[mayanProtocol] = enabled;
	}	

	receive() external payable {}  
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

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

interface IFeeManager {
    event ProtocolFeeCalced(uint8 bps);
    event FeeDeposited(address relayer, address token, uint256 amount);
    event FeeWithdrawn(address token, uint256 amount);

    function calcProtocolBps(
        uint64 amountIn,
        address tokenIn,
        bytes32 tokenOut,
        uint16 destChain,
        uint8 referrerBps
    ) external returns (uint8);

	function feeCollector() external view returns (address);

    function depositRelayerFee(address relayer, address token, uint256 amount) payable external;
    function withdrawRelayerFee(address token, uint256 amount) external;
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_guardian","type":"address"},{"internalType":"address[]","name":"_swapProtocols","type":"address[]"},{"internalType":"address[]","name":"_mayanProtocols","type":"address[]"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"UnsupportedProtocol","type":"error"},{"inputs":[{"internalType":"address","name":"newGuardian","type":"address"}],"name":"changeGuardian","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimGuardian","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address","name":"mayanProtocol","type":"address"},{"internalType":"bytes","name":"mayanData","type":"bytes"},{"components":[{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct FulfillHelper.PermitParams","name":"permitParams","type":"tuple"}],"name":"directFulfill","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address","name":"fulfillToken","type":"address"},{"internalType":"address","name":"swapProtocol","type":"address"},{"internalType":"bytes","name":"swapData","type":"bytes"},{"internalType":"address","name":"mayanProtocol","type":"address"},{"internalType":"bytes","name":"mayanData","type":"bytes"},{"components":[{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct FulfillHelper.PermitParams","name":"permitParams","type":"tuple"}],"name":"fulfillWithERC20","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address","name":"fulfillToken","type":"address"},{"internalType":"address","name":"swapProtocol","type":"address"},{"internalType":"bytes","name":"swapData","type":"bytes"},{"internalType":"address","name":"mayanProtocol","type":"address"},{"internalType":"bytes","name":"mayanData","type":"bytes"}],"name":"fulfillWithEth","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"guardian","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"mayanProtocols","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nextGuardian","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address payable","name":"to","type":"address"}],"name":"rescueEth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"rescueToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"mayanProtocol","type":"address"},{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setMayanProtocol","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"swapProtocol","type":"address"},{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setSwapProtocol","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"swapProtocols","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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000000000000000000000000933e3922e04d47a466e60a20e486b372b64f1ea8000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000001000000000000000000000000111111125421ca6dc452d289314280a0f8842a650000000000000000000000000000000000000000000000000000000000000001000000000000000000000000c38e4e6a15593f908255214653d3d947ca1c2338

-----Decoded View---------------
Arg [0] : _guardian (address): 0x933E3922E04d47a466e60A20e486b372B64F1Ea8
Arg [1] : _swapProtocols (address[]): 0x111111125421cA6dc452d289314280a0f8842A65
Arg [2] : _mayanProtocols (address[]): 0xC38e4e6A15593f908255214653d3D947CA1c2338

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000933e3922e04d47a466e60a20e486b372b64f1ea8
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [4] : 000000000000000000000000111111125421ca6dc452d289314280a0f8842a65
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [6] : 000000000000000000000000c38e4e6a15593f908255214653d3d947ca1c2338