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// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2025 - all rights reserved
pragma solidity ^0.8.20;

import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { AccessControlEnumerable } from "@openzeppelin/contracts/access/AccessControlEnumerable.sol";
import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import { IGateKeeper } from "../interfaces/IGateKeeper.sol";
import { IBridge } from "../interfaces/IBridge.sol";
import { IExecutorFeeManager } from "../interfaces/IExecutorFeeManager.sol";
import { IValidatedDataReceiver } from "../interfaces/IValidatedDataReceiver.sol";
import { INativeTreasuryFactory } from '../interfaces/INativeTreasuryFactory.sol';
import { INativeTreasury } from  "../interfaces/INativeTreasury.sol";
import { NativeTreasury } from './NativeTreasury.sol';
import { Typecast } from "../utils/Typecast.sol";
import { RequestIdLib } from "../utils/RequestIdLib.sol";


contract GateKeeper is IGateKeeper, AccessControlEnumerable, Typecast, ReentrancyGuard {

    struct BaseFee {
        /// @dev chainId The ID of the chain for which the base fee is being set
        uint64 chainId;
        /// @dev bridge 
        address bridge;
        /// @dev fee The amount of the base fee being set
        uint256 fee;
    }

    struct Rate {
        /// @dev chainId The ID of the chain for which the base fee is being set
        uint64 chainId;
        /// @dev bridge 
        address bridge;
        /// @dev rate The rate being set
        uint256 rate;
    }

    /// @dev operator role id
    bytes32 public constant OPERATOR_ROLE = keccak256("OPERATOR_ROLE");
    /// @dev treasury admin role
    bytes32 public constant TREASURY_ADMIN_ROLE = keccak256("TREASURY_ADMIN_ROLE");
    /// @dev max discount for additional fee
    uint256 public constant MAX_DISCOUNT = 10000;

    /// @dev receiver contract
    address public receiver;
    /// @dev bridge Eywa contract
    address public bridgeEywa;
    /// @dev treasury address
    address public treasury;
    /// @dev bridge => is registered
    mapping(address => bool) public registeredBridges;  
    /// @dev chainId => bridge => base fees
    mapping(uint64 => mapping(address => uint256)) public baseFees;
    /// @dev chainId => pay token => rate (per byte)
    mapping(uint64 => mapping(address => uint256)) public rates;
    /// @dev protocol => treasury
    mapping(address => address) public treasuries; 
    /// @dev protocol -> threshold
    mapping(bytes32 => uint8) public threshold;
    /// @dev array of sorted by priorities bridges. Bytes32 = protocol address + chainIdTo
    mapping(bytes32 => address[]) public bridgesByPriority;
    /// @dev protocol => discounts, [0, 10000]
    mapping(address => uint256) public discounts;
    /// @dev msg.sender -> executor
    mapping(address => address) public executors;
    /// @dev requestId -> hash of data
    mapping(bytes32 => bytes32) public sentDataHash;

    event ReceiverSet(address receiver);
    event BridgeEywaSet(address bridgeEywa);
    event TreasurySet(address treasury);
    event BridgeRegistered(address bridge, bool status);
    event BaseFeeSet(uint64 chainId, address bridge, uint256 fee);
    event RateSet(uint64 chainId, address bridge, uint256 rate);
    event ThresholdSet(address sender, uint64[] chainIds, uint8[] threshold);
    event BridgesPriorityUpdated(address protocol, uint64[] chainIds, address[][] bridges);
    event DiscountSet(address protocol, uint256 discount);
    event ExecutorSet(address protocol, address executor);
    event FeesWithdrawn(address token, uint256 amount, address to);
    event DataSent(
        address[] selectedBridges, 
        bytes32 requestId, 
        bytes collectedData, 
        bytes32 to, 
        uint64 chainIdTo, 
        uint256 nonce, 
        address sender
    );
    event RetrySent(
        address bridge, 
        IBridge.SendParams params,
        uint256 nonce, 
        address sender
    );
    event ExecutionPaid(
        bytes32 requestId, 
        uint64 chainIdTo, 
        bytes options, 
        uint256 executeGasFee,
        address sender,
        address treasury,
        address executor
    );

    constructor(address receiver_) {
        require(receiver_ != address(0), "GateKeeper: zero address");
        receiver = receiver_;
        _grantRole(DEFAULT_ADMIN_ROLE, _msgSender());
    }

    receive() external payable { }

    /**
     * @notice Sets the address of the Receiver contract.
     *
     * @dev Only the contract admin is allowed to call this function.
     *
     * @param receiver_ the address of the new Receiver contract to be set.
     */
    function setReceiver(address receiver_) external onlyRole(DEFAULT_ADMIN_ROLE) {
        require(receiver_ != address(0), "GateKeeper: zero address");
        receiver = receiver_;
        emit ReceiverSet(receiver_);
    }

    /**
     * @notice Sets the address of the Eywa BridgeV3 contract.
     *
     * @dev Only the contract admin is allowed to call this function.
     *
     * @param bridgeEywa_ the address of the new Eywa BridgeV3 contract to be set.
     */
    function setBridgeEywa(address bridgeEywa_) external onlyRole(DEFAULT_ADMIN_ROLE) {
        require(bridgeEywa_ != address(0), "GateKeeper: zero address");
        bridgeEywa = bridgeEywa_;
        emit BridgeEywaSet(bridgeEywa_);
    }

    /**
     * @notice Sets the address of the treasury contract.
     *
     * @dev Only the contract owner is allowed to call this function.
     *
     * @param treasury_ the address of the new BridgeV2 contract to be set.
     */
    function setTreasury(address treasury_) external onlyRole(DEFAULT_ADMIN_ROLE) {
        require(treasury_ != address(0), "GateKeeper: zero address");
        treasury = treasury_;
        emit TreasurySet(treasury_);
    }

    /**
     * @dev Set bridge registration
     * 
     * @param bridge  bridge address
     * @param status  new status
     */
    function updateBridgeRegistration(address bridge, bool status) external onlyRole(OPERATOR_ROLE) {
        require(bridge != address(0), "GateKeeper: zero address");
        registeredBridges[bridge] = status;
        emit BridgeRegistered(bridge, status);
    }

    /**
     * @dev Sets the base fee for a given chain ID and token address.
     * The base fee represents the minimum amount of pay {TOKEN} required as transaction fee.
     *
     * @param baseFees_ The array of the BaseFee structs.
     */
    function setBaseFee(BaseFee[] memory baseFees_) external onlyRole(OPERATOR_ROLE) {
        for (uint256 i = 0; i < baseFees_.length; ++i) {
            BaseFee memory baseFee = baseFees_[i];
            baseFees[baseFee.chainId][baseFee.bridge] = baseFee.fee;
            emit BaseFeeSet(baseFee.chainId, baseFee.bridge, baseFee.fee);
        }
    }

    /**
     * @dev Sets the rate for a given chain ID and token address.
     * The rate will be applied based on the length of the data being transmitted between the chains.
     *
     * @param rates_ The array of the Rate structs.
     */
    function setRate(Rate[] memory rates_) external onlyRole(OPERATOR_ROLE) {
        for (uint256 i = 0; i < rates_.length; ++i) {
            Rate memory rate = rates_[i];
            rates[rate.chainId][rate.bridge] = rate.rate;
            emit RateSet(rate.chainId, rate.bridge, rate.rate);
        }
    }

    /**
     * @dev Register protocol, deploy trasury for it
     * 
     * @param treasuryAdmin_ admin of treasury, which can withdraw
     * @param protocol_ Protocol address who will use treasury
     */
    function registerProtocol(address treasuryAdmin_, address protocol_) external onlyRole(TREASURY_ADMIN_ROLE) {
        require(treasuries[protocol_] == address(0), "GateKeeper: protocol registered");
        treasuries[protocol_] = address(new NativeTreasury(treasuryAdmin_));
    }

    /**
     * @dev Sets protocol's threshold. Must be the same on the receiver's side.
     *
     * @param protocol The protocol protocol contract address;
     * @param threshold_ The threshold for the given contract address.
     */
    function setThreshold(address protocol, uint64[] memory chainIdTo, uint8[] memory threshold_) external onlyRole(OPERATOR_ROLE) {
        uint256 length = chainIdTo.length;
        require(length == threshold_.length, "GateKeeper: wrong lengths");
        for (uint256 i; i < length; ++i) {
            require(threshold_[i] >= 1, "GateKeeper: wrong threshold");
            threshold[_packKey(protocol, chainIdTo[i])] = threshold_[i];
        }
        emit ThresholdSet(protocol, chainIdTo, threshold_);
    }

    /**
     * @dev Updates bridge priority. 
     * 
     * @param protocol_ protocol address
     * @param chainIds_ List of chainIds for each pair protocol + chainId may be different bridge priority
     * @param bridges_ sorted by priority array for each chainId. First elem higher priority, then last
     */
    function updateBridgesPriority(address protocol_, uint64[] memory chainIds_, address[][] memory bridges_) external onlyRole(OPERATOR_ROLE) {
        uint256 length = chainIds_.length;
        require(length == bridges_.length, "GateKeeper: wrong lengths");
        for (uint256 i; i < length; ++i) {
            bridgesByPriority[_packKey(protocol_, chainIds_[i])] = bridges_[i];
        }
        emit BridgesPriorityUpdated(protocol_, chainIds_, bridges_);
    }

    /**
     * @dev Sets the discount for a given protocol. Have to be in [0, 10000], where 10000 is 100%.
     *
     * @param protocol The address of the protocol for which the discount is being set;
     * @param discount The discount being set.
     */
    function setDiscount(address protocol, uint256 discount) external onlyRole(OPERATOR_ROLE) {
        require(discount <= MAX_DISCOUNT, "GateKeeper: wrong discount");
        discounts[protocol] = discount;
        emit DiscountSet(protocol, discount);
    }

    /**
     * @notice Sets the address of the ExecutorFeeManager contract.
     *
     * @dev Only the contract operator is allowed to call this function.
     *
     * @param protocol The address of the protocol
     * @param executor The address of the executor for protocol
     */
    function setExecutor(address protocol, address executor) external onlyRole(OPERATOR_ROLE) {
        require(protocol != address(0), "GateKeeper: zero address");
        require(executor != address(0), "GateKeeper: zero address");
        executors[protocol] = executor;
        emit ExecutorSet(protocol, executor);
    }

    /**
     * @dev Sends data to a destination contract
     *
     * @param data The data (encoded with selector) which would be send to the destination contract;
     * @param to The address of the destination contract;
     * @param chainIdTo The ID of the chain where the destination contract resides;
     * @param currentOptions Additional options for bridges and executors. 
     *  Params must be sorted by priority
     *  bridge_1 - bridge with priority 1, bridge_2 - bridge with priority 2
     *  [bridge_1_options, bridge_2_options, bridge_3_options, executor_options, external nonce\salt]
     */
    function sendData(
        bytes calldata data,
        bytes32 to,
        uint64 chainIdTo,
        bytes[] memory currentOptions
    ) external nonReentrant returns(uint256 fee) {
        uint256 executeFee;
        (uint256 sendFee, bytes32 requestId) = _sendData(data, to, chainIdTo, currentOptions);
        if (threshold[_packKey(msg.sender, chainIdTo)] > 1) {
            executeFee = _payForExecute(requestId, chainIdTo, currentOptions[currentOptions.length - 2]);
        }
        return sendFee + executeFee;
    }        

    /**
     * @dev Retry transaction, that was send. Send it only with same params
     * 
     * @param params send params. params.data must be collectedData
     * @param nonce nonce
     * @param protocol protocol address
     * @param bridge bridge to retry send
     * @param currentOptions options of current call. Can be differ from first call
     * @param isHash flag for choose send data or hash
     */
    function retry(
        IBridge.SendParams memory params,
        uint256 nonce,
        address protocol,
        address bridge,
        bytes memory currentOptions,
        bool isHash
    ) external payable {
        require(registeredBridges[bridge], "GateKeeper: bridge not registered");
        require(sentDataHash[params.requestId] == keccak256(abi.encode(
            params,
            nonce,
            protocol
        )), "GateKeeper: wrong data");
        bool isBridgeFound;
        address[] memory protocolBridges = bridgesByPriority[_packKey(protocol, uint64(params.chainIdTo))];
        for (uint256 i; i < protocolBridges.length; ++i) {
            if (protocolBridges[i] == bridge) {
                isBridgeFound = true;
            }
        }
        require (isBridgeFound, "GateKeeper: wrong bridge");
        bytes32 requestId = RequestIdLib.prepareRequestId(
            params.to,
            params.chainIdTo,
            castToBytes32(protocol),
            block.chainid,
            nonce
        );
        if (isHash) {
            params.data = _encodeOut(params.data, protocol, requestId, true);

        } else {
            params.data = _encodeOut(params.data, protocol, requestId, false);
        }

        (, uint256 gasFee) = _sendCustomBridge(
            bridge,
            params,
            nonce,
            protocol,
            currentOptions,
            discounts[address(0)]
        );
        
        require(msg.value >= gasFee, "GateKeeper: not enough value");
        (bool success, ) = treasuries[protocol].call{value: gasFee}("");
        require(success, "GateKeeper: failed to send Ether");
        if (msg.value > gasFee) {
            (success, ) = msg.sender.call{value: msg.value - gasFee}("");
            require(success, "GateKeeper: failed to send Ether");
        }
        emit RetrySent(bridge, params, nonce, msg.sender);
    }

    /**
     * @dev Allows the owner to withdraw collected fees from the contract. Use address(0) to
     * withdraw native asset.
     *
     * @param token The token address from which the fees need to be withdrawn;
     * @param amount The amount of fees to be withdrawn;
     */
    function withdrawFees(address token, uint256 amount) external nonReentrant {
        require(treasury != address(0), "GateKeeper: treasury not set");
        if (token == address(0)) {
            (bool sent,) = treasury.call{value: amount}("");
            require(sent, "GateKeeper: failed to send Ether");
        } else {
            SafeERC20.safeTransfer(IERC20(token), treasury, amount);
        }
        emit FeesWithdrawn(token, amount, treasury);
    }

    /**
     * @dev Returns the address of the part of the bridge that delivers to the destination chain.
     * In this case this is receiver contract
     * NOTE: to support legacy
     */
    function bridge() external view returns(address) {
        return receiver;
    }

    /**
     * @dev Select bridge by priority and by threshold
     * 
     * @param protocol protocol, which uses bridge
     * @param chainIdTo chain id to send
     */
    function selectBridgesByPriority(address protocol, uint64 chainIdTo) public view returns(address[] memory) {
        bytes32 key = _packKey(protocol, chainIdTo);
        uint8 threshold_ = threshold[key];
        require(threshold_ > 0, "GateKeeper: zero threshold");
        require(threshold_ <= bridgesByPriority[key].length, "GateKeeper: not enough bridges");
        address[] memory selectedBridges = new address[](threshold_);
        for (uint8 i; i < threshold_; ++i) {
            address currentBridge = bridgesByPriority[key][i];
            require(registeredBridges[currentBridge], "GateKeeper: bridge not registered");
            selectedBridges[i] = currentBridge;
        }
        return selectedBridges;
    }

    /**
     * @dev Sends data to a destination contract
     *
     * @param data The data (encoded with selector) which would be send to the destination contract;
     * @param to The address of the destination contract;
     * @param chainIdTo The ID of the chain where the destination contract resides;
     * @param currentOptions Additional options for bridges. 
     *  Params must be sorted by priority
     *  bridge_1 - bridge with priority 1, bridge_2 - bridge with priority 2
     *  [bridge_1_options, bridge_2_options, bridge_3_options, executor_options, external nonce\salt]
     */
    function estimateGasFee(
        bytes calldata data,
        bytes32 to,
        uint64 chainIdTo,
        bytes[] memory currentOptions
    ) public view returns (uint256, uint256) {
        bytes32 requestId;
        uint256 nonce = abi.decode(currentOptions[currentOptions.length - 1], (uint256));
        bytes memory collectedData;
        (requestId, collectedData) = _buildData(to, chainIdTo, data, nonce);
        address[] memory selectedBridges = selectBridgesByPriority(msg.sender, uint64(chainIdTo));
        bytes memory out;
        uint256 sendFee;
        for (uint8 i; i < selectedBridges.length; ++i) {
            if (i == 0) {
                out = _encodeOut(collectedData, msg.sender, requestId, false);
            } else if (i == 1) {
                out = _encodeOut(collectedData, msg.sender, requestId, true);
            }
            sendFee += _quoteCustomBridge(
                selectedBridges[i], 
                IBridge.SendParams({
                        requestId: requestId,
                        data: out,
                        to: to,
                        chainIdTo: chainIdTo
                }), 
                msg.sender,
                currentOptions[i],
                discounts[msg.sender]
            );
        }
        uint256 executeFee = 0;
        if (threshold[_packKey(msg.sender, chainIdTo)] > 1) {
            address executor = executors[msg.sender];
            require(executor != address(0), "GateKeeper: no executor configured");
            executeFee = IExecutorFeeManager(executor).estimateExecutorGasFee(chainIdTo, currentOptions[currentOptions.length - 2]);
        }
        uint256 totalFee = sendFee + executeFee;
        return (totalFee, executeFee);
    }

    /**
     * @dev Calculates the cost for a cross-chain operation in the specified token.
     *
     * @param dataLength The length of the data being transmitted in the cross-chain operation;
     * @param chainIdTo The ID of the destination chain;
     * @param discountPersentage The discount for protocol;
     * @param bridge The use bridge;
     * @return additionalFee The fee amount to be paid for the cross-chain operation.
     */
    function calculateAdditionalFee(
        uint256 dataLength,
        uint64 chainIdTo,
        address bridge,
        uint256 discountPersentage
    ) public view returns (uint256 additionalFee) {
        if (bridge == bridgeEywa && discountPersentage < MAX_DISCOUNT) {
            uint256 baseFee = baseFees[chainIdTo][bridge];
            uint256 rate = rates[chainIdTo][bridge];
            require(baseFee != 0, "GateKeeper: base fee not set");
            require(rate != 0, "GateKeeper: rate not set");
            additionalFee = baseFee + (dataLength * rate);
            require(additionalFee >= 10, "GateKeeper: additionalFee is too small");
            additionalFee -= additionalFee * discountPersentage / MAX_DISCOUNT;
        }
    }

    /**
     * @dev Sends data to a destination contract
     */
    function _sendData(
        bytes calldata data,
        bytes32 to,
        uint64 chainIdTo,
        bytes[] memory currentOptions
    ) internal returns(uint256 sendFee, bytes32 requestId) {
        bytes memory out;
        uint256 nonce = abi.decode(currentOptions[currentOptions.length - 1], (uint256));
        bytes memory collectedData;
        {
            (requestId, collectedData) = _buildData(to, chainIdTo, data, nonce);
            require(sentDataHash[requestId] == 0, "GateKeeper: requestId already used");
            sentDataHash[requestId] = keccak256(abi.encode(
                IBridge.SendParams({
                        requestId: requestId,
                        data: collectedData,
                        to: to,
                        chainIdTo: chainIdTo
                }), 
                nonce,
                msg.sender
            ));
        }
        address[] memory selectedBridges = selectBridgesByPriority(msg.sender, chainIdTo);

        require(selectedBridges.length > 0, "GateKeeper: zero selected bridges");
        require(selectedBridges.length == (currentOptions.length - 2), "GateKeeper: options incorrect");
        {
            for (uint8 i; i < selectedBridges.length; ++i) {
                if (i == 0) {
                    out = _encodeOut(collectedData, msg.sender, requestId, false);
                } else if (i == 1) {
                    out = _encodeOut(collectedData, msg.sender, requestId, true);
                }
                (uint256 totalFee,) = _sendCustomBridge(
                    selectedBridges[i], 
                    IBridge.SendParams({
                            requestId: requestId,
                            data: out,
                            to: to,
                            chainIdTo: chainIdTo
                    }), 
                    nonce,
                    msg.sender,
                    currentOptions[i],
                    discounts[msg.sender]
                );
                sendFee += totalFee;
            }
        }

        emit DataSent(selectedBridges, requestId, collectedData, to, chainIdTo, nonce, msg.sender);
        return (sendFee, requestId);
    }

    /**
     * @dev Send data by custom bridge
     * 
     * @param bridge_ bridge address
     * @param params params to send
     * @param nonce nonce 
     * @param protocol protocol address
     * @param options  additional options for bridge call
     */
    function _sendCustomBridge(
        address bridge_,
        IBridge.SendParams memory params,
        uint256 nonce,
        address protocol,
        bytes memory options,
        uint256 discountPersentage
    ) internal returns(uint256, uint256) {
        uint256 gasFee;
        uint256 totalFee;
        (totalFee, gasFee) = _calculateGasFee(
            bridge_,
            params,
            protocol,
            options,
            discountPersentage
        );
        INativeTreasury(treasuries[protocol]).getValue(totalFee);
        IBridge(bridge_).sendV3{value: bridge_ == bridgeEywa ? 0 : gasFee}(
            params,
            protocol,
            nonce,
            options
        );
        return (totalFee, gasFee);
    }

    function _payForExecute(bytes32 requestId, uint64 chainIdTo, bytes memory options) internal returns(uint256) {
        address executor = executors[msg.sender];
        address treasury = treasuries[msg.sender];
        uint256 executeGasFee = IExecutorFeeManager(executor).estimateExecutorGasFee(chainIdTo, options);
        INativeTreasury(treasury).getValue(executeGasFee);
        IExecutorFeeManager(executor).payExecutorGasFee{value: executeGasFee}(requestId, chainIdTo, options, treasury);
        emit ExecutionPaid(requestId, chainIdTo, options, executeGasFee, msg.sender, treasury, executor);
        return executeGasFee;
    }

    /**
     * @dev Build data, requestId and nonce
     * 
     * @param to  address to send
     * @param chainIdTo chain id to send
     * @param data data to send
     */
    function _buildData(bytes32 to, uint64 chainIdTo, bytes calldata data, uint256 nonce) internal view returns(bytes32, bytes memory) {
        bytes32 requestId;
        bytes memory collectedData;
        {
            requestId = RequestIdLib.prepareRequestId(
                to,
                chainIdTo,
                castToBytes32(msg.sender),
                block.chainid,
                nonce
            );
            bytes memory info = abi.encodeWithSelector(
                IValidatedDataReceiver.receiveValidatedData.selector,
                bytes4(data[:4]),
                castToBytes32(msg.sender),
                block.chainid
            );
            collectedData = abi.encode(
                data, 
                info, 
                nonce, 
                to
            );
        }
        return (requestId, collectedData);
    }

    /**
     * @dev Encode out data, add isHash bytes to end
     * 
     * @param collectedData  collected data
     * @param sender protocol address
     * @param requestId request id
     * @param isHash is hash flag
     */
    function _encodeOut(
        bytes memory collectedData, 
        address sender, 
        bytes32 requestId, 
        bool isHash
    ) internal view returns(bytes memory newOut) {
        bytes memory out;
        bytes1 isHashByte;
        if (isHash) {
            out = abi.encode(keccak256(collectedData), castToBytes32(sender), block.chainid, requestId);
            isHashByte = 0x01;
        } else {
            out = abi.encode(collectedData, castToBytes32(sender), block.chainid, requestId);
            isHashByte = 0x00;
        }
        uint256 length = out.length;
        newOut = new bytes(length + 1);
        for (uint j; j < length; ++j) {
            newOut[j] = out[j];
        }
        newOut[length] = isHashByte;
    }

    /**
     * @dev Calculate fees for send
     * 
     * @param bridge_ bridge address
     * @param params params to send
     * @param protocol protocol address
     * @param options  additional options for bridge call
     * @param discountPersentage  discount persentage
     */
    function _calculateGasFee(
        address bridge_,
        IBridge.SendParams memory params,
        address protocol,
        bytes memory options,
        uint256 discountPersentage
    ) internal view returns(uint256, uint256) {
        uint256 gasFee = IBridge(bridge_).estimateGasFee(
            params,
            protocol,
            options
        );
        uint256 totalFee = gasFee;
        if (bridge_ == bridgeEywa) {
            totalFee += calculateAdditionalFee(params.data.length, uint64(params.chainIdTo), bridge_, discountPersentage);
        }
        return (totalFee, gasFee);
    }

    /**
     * @dev Quote fee for send
     * 
     * @param bridge_ bridge address
     * @param params params to send
     * @param protocol protocol address
     * @param options  additional options for bridge call
     * @param discountPersentage  discount persentage
     */
    function _quoteCustomBridge(
        address bridge_,
        IBridge.SendParams memory params,
        address protocol,
        bytes memory options,
        uint256 discountPersentage
    ) internal view returns (uint256) {
        (uint256 totalFee, ) = _calculateGasFee(
            bridge_,
            params,
            protocol,
            options,
            discountPersentage
        );
        return totalFee;
    }

    /**
     * @dev Pack address and uint64 to bytes32 as a key
     * 
     * @param addr  address
     * @param number number
     */
    function _packKey(address addr, uint64 number) internal pure returns(bytes32) {
        bytes32 packedKey = bytes32(uint256(uint160(addr)) << 64);
        packedKey |= bytes32(uint256(number));
        return packedKey;
    }
}

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol)

pragma solidity ^0.8.0;

import "./IAccessControlEnumerable.sol";
import "./AccessControl.sol";
import "../utils/structs/EnumerableSet.sol";

/**
 * @dev Extension of {AccessControl} that allows enumerating the members of each role.
 */
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
    using EnumerableSet for EnumerableSet.AddressSet;

    mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) {
        return _roleMembers[role].at(index);
    }

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) {
        return _roleMembers[role].length();
    }

    /**
     * @dev Overload {_grantRole} to track enumerable memberships
     */
    function _grantRole(bytes32 role, address account) internal virtual override {
        super._grantRole(role, account);
        _roleMembers[role].add(account);
    }

    /**
     * @dev Overload {_revokeRole} to track enumerable memberships
     */
    function _revokeRole(bytes32 role, address account) internal virtual override {
        super._revokeRole(role, account);
        _roleMembers[role].remove(account);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerable is IAccessControl {
    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

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

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: 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
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

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

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

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

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```solidity
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2025 - all rights reserved
pragma solidity ^0.8.20;

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import "../interfaces/INativeTreasury.sol";


contract NativeTreasury is INativeTreasury, Ownable {
    address public immutable gateKeeper;
    event ValueSent(uint256 value, address to);

    constructor(address admin_) {
        require(admin_ != address(0), "NativeTreasury: zero address");
        _transferOwnership(admin_);
        gateKeeper = msg.sender;
    }

    receive() external payable {}

    /**
     * @dev Get value for msg.sender
     *
     * @param value_ value to transfer
     */
    function getValue(uint256 value_) external {
        require(msg.sender == gateKeeper || msg.sender == owner(), "NativeTreasury: only admin or gatekeeper");
        (bool success, ) = msg.sender.call{value: value_}("");
        require(success, "NativeTreasury: failed to send Ether");
        emit ValueSent(value_, msg.sender);
    }
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2025 - all rights reserved
pragma solidity ^0.8.20;


interface IBridge {

    enum State { 
        Active, // data send and receive possible
        Inactive, // data send and receive impossible
        Limited // only data receive possible
    }

    struct SendParams {
        /// @param requestId unique request ID
        bytes32 requestId;
        /// @param data call data
        bytes data;
        /// @param to receiver contract address
        bytes32 to;
        /// @param chainIdTo destination chain ID
        uint64 chainIdTo;
    }

    function sendV3(
        SendParams calldata params,
        address sender,
        uint256 nonce,
        bytes memory options
    ) external payable;

    function estimateGasFee(
        SendParams memory  params,
        address sender,
        bytes memory options
    ) external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2025 - all rights reserved
pragma solidity ^0.8.20;


interface IExecutorFeeManager {

    function estimateExecutorGasFee(uint64 chainIdTo, bytes memory options) external view returns(uint256);

    function payExecutorGasFee(bytes32 sentHash, uint64 chainIdTo, bytes memory options, address refundTarget) external payable;

}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2025 - all rights reserved
pragma solidity ^0.8.20;

interface IGateKeeper {

    function sendData(
        bytes calldata data,
        bytes32 to,
        uint64 chainIdTo,
        bytes[] memory options
    ) external returns(uint256);

    function estimateGasFee(
        bytes calldata data,
        bytes32 to,
        uint64 chainIdTo,
        bytes[] memory options
    ) external view returns(uint256, uint256);

    function calculateAdditionalFee(
        uint256 dataLength,
        uint64 chainIdTo,
        address bridge,
        uint256 discountPersentage
    ) external view returns (uint256 amountToPay);

    function treasuries(address protocol) external view returns (address treasury);
    function bridge() external view returns(address);
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2023 - all rights reserved
pragma solidity ^0.8.17;

interface INativeTreasury {

    function getValue(uint256 value_) external;
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2024 - all rights reserved
pragma solidity ^0.8.20;


interface INativeTreasuryFactory {

    function createNativeTreasury(
        address admin
    ) external returns (address); 

}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2025 - all rights reserved
pragma solidity ^0.8.20;


interface IValidatedDataReceiver {

    /**
     * @notice Function which will be called by desination bridge.
     *
     * @dev Receiver contract must ensure that's from and chainIdFrom correct.
     *
     * @param selector selector which will be called;
     * @param from sender address in source chain;
     * @param chainIdFrom source chain id.
     */
    function receiveValidatedData(bytes4 selector, bytes32 from, uint64 chainIdFrom) external returns (bool);

}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2025 - all rights reserved
pragma solidity ^0.8.20;

library RequestIdLib {

    bytes32 private constant TYPEHASH = keccak256(
        "CrosschainRequest/v1(uint256 chainIdFrom,bytes32 from,uint256 chainIdTo,bytes32 to,bytes32 salt)"
    );

    function prepareRequestId(
        bytes32 to,
        uint256 chainIdTo,
        bytes32 from,
        uint256 chainIdFrom,
        uint256 salt
    ) internal pure returns (bytes32) {
        return keccak256(abi.encode(TYPEHASH, chainIdFrom, from, chainIdTo, to, salt));
    }
}

// SPDX-License-Identifier: UNLICENSED
// Copyright (c) Eywa.Fi, 2021-2023 - all rights reserved
pragma solidity ^0.8.20;

abstract contract Typecast {
    function castToAddress(bytes32 x) public pure returns (address) {
        return address(uint160(uint256(x)));
    }

    function castToBytes32(address a) public pure returns (bytes32) {
        return bytes32(uint256(uint160(a)));
    }
}

{
  "evmVersion": "shanghai",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/[email protected]/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/[email protected]/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/[email protected]/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/[email protected]/"
  ]
}

• No Contract Security Audit Submitted- Submit Audit Here

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0000000000000000000000000f00f1a6a32e644815c5686ad7dc305a54b11200

-----Decoded View---------------
Arg [0] : receiver_ (address): 0x0F00F1a6A32e644815C5686aD7dc305A54B11200

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000f00f1a6a32e644815c5686ad7dc305a54b11200