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//
//            __               ___ ___    __            _
//           (_  | | |\/| |\/|  |   |    (_ \    / /\  |_)
//           __) |_| |  | |  | _|_  |    __) \/\/ /--\ |
//

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import { Query, Offer, FormattedOffer, Trade, ISummitRouter } from "./interface/ISummitRouter.sol";
import { IAdapterV2 } from "./interface/IAdapterV2.sol";
import { IBlast } from "./interface/IBlast.sol";
import { IERC20, IERC20Permit, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IWETHV2 } from "./interface/IWETHV2.sol";
import { Maintainable } from "./lib/Maintainable.sol";
import { OfferUtils, FormattedOfferUtils } from "./lib/SummitViewUtils.sol";
import { Recoverable } from "./lib/Recoverable.sol";
import { ISummitVolumeAdapter } from "./interface/ISummitVolumeAdapter.sol";

contract SummitRouterV2 is Maintainable, Recoverable, ISummitRouter {
    using SafeERC20 for IERC20;
    using SafeERC20 for IERC20Permit;
    using OfferUtils for Offer;

    address public immutable WNATIVE;
    address public constant NATIVE = address(0);
    string public constant NAME = "SummitRouterV2";
    uint256 public constant FEE_DENOMINATOR = 1e4;
    uint256 public MIN_FEE = 0;
    address public FEE_CLAIMER;
    address[] public TRUSTED_TOKENS;
    mapping(address => uint256) public TOKEN_VOLUME_MULTIPLIERS; // (token amount * tokenVolumeMultiplier[token]) / 1e12
    mapping(address => uint256) public TOKEN_VOLUME_BONUS;
    address[] public ADAPTERS;
    address public VOLUME_ADAPTER;

    error AlreadyInitialized();
    error InvalidTradePath();

    constructor(
        address[] memory _adapters,
        address[] memory _trustedTokens,
        address _feeClaimer,
        address _wrapped_native
    ) {
        setAllowanceForWrapping(_wrapped_native);
        setTrustedTokens(_trustedTokens);
        setFeeClaimer(_feeClaimer);
        setAdapters(_adapters);
        WNATIVE = _wrapped_native;
    }

    bool public initialized = false;
    address public governor;
    function initialize(address _governor) public onlyMaintainer {
        if (initialized) revert AlreadyInitialized();
        initialized = true;

        IBlast blast = IBlast(0x4300000000000000000000000000000000000002);
        blast.configureClaimableGas();
        blast.configureGovernor(_governor);

        governor = _governor;
    }

    // -- SETTERS --

    function setAllowanceForWrapping(address _wnative) public onlyMaintainer {
        IERC20(_wnative).safeApprove(_wnative, type(uint256).max);
    }

    function setTrustedTokens(address[] memory _trustedTokens) public override onlyMaintainer {
        emit UpdatedTrustedTokens(_trustedTokens);
        TRUSTED_TOKENS = _trustedTokens;
    }

    function setTokenVolumeMultipliers(
        address[] memory _tokens,
        uint256[] memory _volumeMultipliers
    ) public onlyMaintainer {
        require(_tokens.length == _volumeMultipliers.length, "SummitRouter: Array length mismatch");
        emit UpdatedTokenVolumeMultipliers(_tokens, _volumeMultipliers);
        for (uint256 i = 0; i < _tokens.length; i++) {
            TOKEN_VOLUME_MULTIPLIERS[_tokens[i]] = _volumeMultipliers[i];
        }
    }

    function setTokenBonusMultipliers(address[] memory _tokens, uint256[] memory _multipliers) public onlyMaintainer {
        require(_tokens.length == _multipliers.length, "SummitRouter: Array length mismatch");
        emit UpdatedTokenBonusMultipliers(_tokens, _multipliers);
        for (uint256 i = 0; i < _tokens.length; i++) {
            TOKEN_VOLUME_BONUS[_tokens[i]] = _multipliers[i];
        }
    }

    function setAdapters(address[] memory _adapters) public override onlyMaintainer {
        emit UpdatedAdapters(_adapters);
        ADAPTERS = _adapters;
    }

    function setVolumeAdapter(address _volumeAdapter) public override onlyMaintainer {
        emit UpdatedVolumeAdapter(_volumeAdapter);
        VOLUME_ADAPTER = _volumeAdapter;
    }

    function setMinFee(uint256 _fee) external override onlyMaintainer {
        emit UpdatedMinFee(MIN_FEE, _fee);
        MIN_FEE = _fee;
    }

    function setFeeClaimer(address _claimer) public override onlyMaintainer {
        emit UpdatedFeeClaimer(FEE_CLAIMER, _claimer);
        FEE_CLAIMER = _claimer;
    }

    //  -- GENERAL --

    function trustedTokensCount() external view override returns (uint256) {
        return TRUSTED_TOKENS.length;
    }

    function adaptersCount() external view override returns (uint256) {
        return ADAPTERS.length;
    }

    // Fallback
    receive() external payable {}

    // -- HELPERS --

    function _applyFee(uint256 _amountIn, uint256 _fee) internal view returns (uint256) {
        require(_fee >= MIN_FEE, "SummitRouter: Insufficient fee");
        return (_amountIn * (FEE_DENOMINATOR - _fee)) / FEE_DENOMINATOR;
    }

    function _wrap(uint256 _amount) internal {
        IWETHV2(WNATIVE).deposit{ value: _amount }();
    }

    function _unwrap(uint256 _amount) internal {
        IWETHV2(WNATIVE).withdraw(_amount);
    }

    /**
     * @notice Return tokens to user
     * @dev Pass address(0) for NATIVE
     * @param _token address
     * @param _amount tokens to return
     * @param _to address where funds should be sent to
     */
    function _returnTokensTo(address _token, uint256 _amount, address _to) internal {
        if (address(this) != _to) {
            if (_token == NATIVE) {
                payable(_to).transfer(_amount);
            } else {
                IERC20(_token).safeTransfer(_to, _amount);
            }
        }
    }

    function _transferFrom(address token, address _from, address _to, uint _amount) internal {
        if (_from != address(this)) IERC20(token).safeTransferFrom(_from, _to, _amount);
        else IERC20(token).safeTransfer(_to, _amount);
    }

    // -- QUERIES --

    /**
     * Query single adapter
     */
    function queryAdapter(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint8 _index
    ) external view override returns (uint256) {
        IAdapterV2 _adapter = IAdapterV2(ADAPTERS[_index]);
        uint256 amountOut = _adapter.query(_amountIn, _tokenIn, _tokenOut);
        return amountOut;
    }

    /**
     * Query specified adapters
     */
    function queryNoSplit(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint8[] calldata _options
    ) public view override returns (Query memory) {
        Query memory bestQuery;
        for (uint8 i; i < _options.length; i++) {
            address _adapter = ADAPTERS[_options[i]];
            uint256 amountOut = IAdapterV2(_adapter).query(_amountIn, _tokenIn, _tokenOut);
            if (i == 0 || amountOut > bestQuery.amountOut) {
                bestQuery = Query(_adapter, _tokenIn, _tokenOut, amountOut);
            }
        }
        return bestQuery;
    }

    /**
     * Query all adapters
     */
    function queryNoSplit(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut
    ) public view override returns (Query memory) {
        Query memory bestQuery;
        for (uint8 i; i < ADAPTERS.length; i++) {
            address _adapter = ADAPTERS[i];
            uint256 amountOut = IAdapterV2(_adapter).query(_amountIn, _tokenIn, _tokenOut);
            if (i == 0 || amountOut > bestQuery.amountOut) {
                bestQuery = Query(_adapter, _tokenIn, _tokenOut, amountOut);
            }
        }
        return bestQuery;
    }

    /**
     * Return path with best returns between two tokens
     * Takes gas-cost into account
     */
    function findBestPathWithGas(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint256 _maxSteps,
        uint256 _gasPrice
    ) external view override returns (FormattedOffer memory) {
        require(_maxSteps > 0 && _maxSteps < 5, "SummitRouter: Invalid max-steps");
        Offer memory queries = OfferUtils.newOffer(_amountIn, _tokenIn);
        uint256 gasPriceInExitTkn = _gasPrice > 0 ? getGasPriceInExitTkn(_gasPrice, _tokenOut) : 0;
        queries = _findBestPath(_amountIn, _tokenIn, _tokenOut, _maxSteps, queries, gasPriceInExitTkn);
        if (queries.adapters.length == 0) {
            queries.amounts = "";
            queries.path = "";
        }
        return queries.format();
    }

    // Find the market price between gas-asset(native) and token-out and express gas price in token-out
    function getGasPriceInExitTkn(uint256 _gasPrice, address _tokenOut) internal view returns (uint256 price) {
        // Avoid low-liquidity price appreciation (https://github.com/yieldsummit/summit-aggregator/issues/20)
        FormattedOffer memory gasQuery = findBestPath(1e18, WNATIVE, _tokenOut, 2);
        if (gasQuery.path.length != 0) {
            // Leave result in nWei to preserve precision for assets with low decimal places
            price = (gasQuery.amounts[gasQuery.amounts.length - 1] * _gasPrice) / 1e9;
        }
    }

    /**
     * Return path with best returns between two tokens
     */
    function findBestPath(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint256 _maxSteps
    ) public view override returns (FormattedOffer memory) {
        require(_maxSteps > 0 && _maxSteps < 5, "SummitRouter: Invalid max-steps");
        Offer memory queries = OfferUtils.newOffer(_amountIn, _tokenIn);
        queries = _findBestPath(_amountIn, _tokenIn, _tokenOut, _maxSteps, queries, 0);
        // If no paths are found return empty struct
        if (queries.adapters.length == 0) {
            queries.amounts = "";
            queries.path = "";
        }
        return queries.format();
    }

    function _findBestPath(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint256 _maxSteps,
        Offer memory _queries,
        uint256 _tknOutPriceNwei
    ) internal view returns (Offer memory) {
        Offer memory bestOption = _queries.clone();
        uint256 bestAmountOut;
        uint256 gasEstimate;
        bool withGas = _tknOutPriceNwei != 0;

        // First check if there is a path directly from tokenIn to tokenOut
        Query memory queryDirect = queryNoSplit(_amountIn, _tokenIn, _tokenOut);

        if (queryDirect.amountOut != 0) {
            if (withGas) {
                gasEstimate = IAdapterV2(queryDirect.adapter).swapGasEstimate();
            }
            bestOption.addToTail(queryDirect.amountOut, queryDirect.adapter, queryDirect.tokenOut, gasEstimate);
            bestAmountOut = queryDirect.amountOut;
        }
        // Only check the rest if they would go beyond step limit (Need at least 2 more steps)
        if (_maxSteps > 1 && _queries.adapters.length / 32 <= _maxSteps - 2) {
            // Check for paths that pass through trusted tokens
            for (uint256 i = 0; i < TRUSTED_TOKENS.length; i++) {
                if (_tokenIn == TRUSTED_TOKENS[i]) {
                    continue;
                }
                // Loop through all adapters to find the best one for swapping tokenIn for one of the trusted tokens
                Query memory bestSwap = queryNoSplit(_amountIn, _tokenIn, TRUSTED_TOKENS[i]);
                if (bestSwap.amountOut == 0) {
                    continue;
                }
                // Explore options that connect the current path to the tokenOut
                Offer memory newOffer = _queries.clone();
                if (withGas) {
                    gasEstimate = IAdapterV2(bestSwap.adapter).swapGasEstimate();
                }
                newOffer.addToTail(bestSwap.amountOut, bestSwap.adapter, bestSwap.tokenOut, gasEstimate);
                newOffer = _findBestPath(
                    bestSwap.amountOut,
                    TRUSTED_TOKENS[i],
                    _tokenOut,
                    _maxSteps,
                    newOffer,
                    _tknOutPriceNwei
                ); // Recursive step
                address tokenOut = newOffer.getTokenOut();
                uint256 amountOut = newOffer.getAmountOut();
                // Check that the last token in the path is the tokenOut and update the new best option if neccesary
                if (_tokenOut == tokenOut && amountOut > bestAmountOut) {
                    if (newOffer.gasEstimate > bestOption.gasEstimate) {
                        uint256 gasCostDiff = (_tknOutPriceNwei * (newOffer.gasEstimate - bestOption.gasEstimate)) /
                            1e9;
                        uint256 priceDiff = amountOut - bestAmountOut;
                        if (gasCostDiff > priceDiff) {
                            continue;
                        }
                    }
                    bestAmountOut = amountOut;
                    bestOption = newOffer;
                }
            }
        }
        return bestOption;
    }

    // -- VOLUME --

    function getTokenBonus(address _token) public view override returns (uint256) {
        if (_token == address(0)) return 0;
        return TOKEN_VOLUME_BONUS[_token];
    }

    function _applyUserVolume(
        address _from,
        address[] memory _path,
        uint256[] memory _amounts
    ) internal returns (uint256) {
        if (VOLUME_ADAPTER == address(0)) return 0;

        uint256 volume = 0;
        uint256 bonus = 0;
        for (uint256 i = 0; i < _path.length; i++) {
            if (bonus == 0 && TOKEN_VOLUME_BONUS[_path[i]] != 0) {
                bonus = TOKEN_VOLUME_BONUS[_path[i]];
            }
            if (volume == 0 && TOKEN_VOLUME_MULTIPLIERS[_path[i]] != 0) {
                volume = (TOKEN_VOLUME_MULTIPLIERS[_path[i]] * _amounts[i]) / 1e12;
            }
        }

        if (volume > 0 && VOLUME_ADAPTER != address(0)) {
            ISummitVolumeAdapter(VOLUME_ADAPTER).addVolume(_from, (volume * (10000 + bonus)) / 10000);
        }

        return volume;
    }

    function _applyAdapterVolume(address _adapter, uint256 _volume) internal {
        if (_volume == 0 || VOLUME_ADAPTER == address(0)) return;
        ISummitVolumeAdapter(VOLUME_ADAPTER).addAdapterVolume(_adapter, _volume);
    }

    // -- SWAPPERS --

    function _swapNoSplit(Trade calldata _trade, address _from, address _to, uint256 _fee) internal returns (uint256) {
        uint256[] memory amounts = new uint256[](_trade.path.length);
        if (_fee > 0 || MIN_FEE > 0) {
            // Transfer fees to the claimer account and decrease initial amount
            amounts[0] = _applyFee(_trade.amountIn, _fee);
            _transferFrom(_trade.path[0], _from, address(this), _trade.amountIn - amounts[0]);
            _transferFrom(_trade.path[0], address(this), FEE_CLAIMER, _trade.amountIn - amounts[0]);
        } else {
            amounts[0] = _trade.amountIn;
        }

        if (_trade.path.length < 2) revert InvalidTradePath();

        // Transfer to target address fetched from adapter
        address targetAddress = IAdapterV2(_trade.adapters[0]).getTransferTarget(_trade.path[0], _trade.path[1]);
        _transferFrom(_trade.path[0], _from, targetAddress, amounts[0]);

        // Get amounts that will be swapped
        for (uint256 i = 0; i < _trade.adapters.length; i++) {
            amounts[i + 1] = IAdapterV2(_trade.adapters[i]).query(amounts[i], _trade.path[i], _trade.path[i + 1]);
        }

        // Add volume to user
        uint256 volume = _applyUserVolume(msg.sender, _trade.path, amounts);

        require(amounts[amounts.length - 1] >= _trade.amountOut, "SummitRouter: Insufficient output amount");
        for (uint256 i = 0; i < _trade.adapters.length; i++) {
            _applyAdapterVolume(_trade.adapters[i], volume);

            // All adapters should transfer output token to the following target
            // All targets are the next adapters target, expect for the last swap where tokens are sent out
            targetAddress = i < _trade.adapters.length - 1
                ? IAdapterV2(_trade.adapters[i + 1]).getTransferTarget(_trade.path[i], _trade.path[i + 1])
                : _to;
            IAdapterV2(_trade.adapters[i]).swap(
                amounts[i],
                amounts[i + 1],
                _trade.path[i],
                _trade.path[i + 1],
                targetAddress
            );
        }

        emit SummitSwap(
            _trade.path[0],
            _trade.path[_trade.path.length - 1],
            _trade.amountIn,
            amounts[amounts.length - 1]
        );
        return amounts[amounts.length - 1];
    }

    function swapNoSplit(Trade calldata _trade, address _to, uint256 _fee) public override {
        _swapNoSplit(_trade, msg.sender, _to, _fee);
    }

    function swapNoSplitFromNATIVE(Trade calldata _trade, address _to, uint256 _fee) external payable override {
        require(_trade.path[0] == WNATIVE, "SummitRouter: Path needs to begin with WNATIVE");
        _wrap(_trade.amountIn);
        _swapNoSplit(_trade, address(this), _to, _fee);
    }

    function swapNoSplitToNATIVE(Trade calldata _trade, address _to, uint256 _fee) public override {
        require(_trade.path[_trade.path.length - 1] == WNATIVE, "SummitRouter: Path needs to end with WNATIVE");
        uint256 returnAmount = _swapNoSplit(_trade, msg.sender, address(this), _fee);
        _unwrap(returnAmount);
        _returnTokensTo(NATIVE, returnAmount, _to);
    }

    /**
     * Swap token to token without the need to approve the first token
     */
    function swapNoSplitWithPermit(
        Trade calldata _trade,
        address _to,
        uint256 _fee,
        uint256 _deadline,
        uint8 _v,
        bytes32 _r,
        bytes32 _s
    ) external override {
        IERC20Permit(_trade.path[0]).safePermit(msg.sender, address(this), _trade.amountIn, _deadline, _v, _r, _s);
        swapNoSplit(_trade, _to, _fee);
    }

    /**
     * Swap token to NATIVE without the need to approve the first token
     */
    function swapNoSplitToNATIVEWithPermit(
        Trade calldata _trade,
        address _to,
        uint256 _fee,
        uint256 _deadline,
        uint8 _v,
        bytes32 _r,
        bytes32 _s
    ) external override {
        IERC20Permit(_trade.path[0]).safePermit(msg.sender, address(this), _trade.amountIn, _deadline, _v, _r, _s);
        swapNoSplitToNATIVE(_trade, _to, _fee);
    }
}

// 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 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 (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
pragma solidity ^0.8.0;

interface IAdapterV2 {
    function name() external view returns (string memory);

    function swapGasEstimate() external view returns (uint256);

    function swap(uint256, uint256, address, address, address) external;

    function getTransferTarget(address tokenIn, address tokenOut) external view returns (address);

    function query(uint256, address, address) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.16;

interface IBlast {
    enum GasMode {
        VOID,
        CLAIMABLE
    }

    function configureClaimableGas() external;
    function configureGovernor(address governor) external;

    function claimAllGas(
        address contractAddress,
        address recipientOfGas
    ) external returns (uint256);

    function claimGasAtMinClaimRate(
        address contractAddress,
        address recipientOfGas,
        uint256 minClaimRateBips
    ) external returns (uint256);

    function claimMaxGas(
        address contractAddress,
        address recipientOfGas
    ) external returns (uint256);

    function claimGas(
        address contractAddress,
        address recipientOfGas,
        uint256 gasToClaim,
        uint256 gasSecondsToConsume
    ) external returns (uint256);

    function readGasParams(
        address contractAddress
    )
        external
        view
        returns (
            uint256 etherSeconds,
            uint256 etherBalance,
            uint256 lastUpdated,
            GasMode
        );
}

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

interface IERC20 {
    event Approval(address, address, uint256);
    event Transfer(address, address, uint256);

    function name() external view returns (string memory);
    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);

    function transferFrom(
        address,
        address,
        uint256
    ) external returns (bool);

    function allowance(address, address) external view returns (uint256);

    function approve(address, uint256) external returns (bool);

    function transfer(address, uint256) external returns (bool);

    function balanceOf(address) external view returns (uint256);

    function nonces(address) external view returns (uint256); // Only tokens that support permit

    function permit(
        address,
        address,
        uint256,
        uint256,
        uint8,
        bytes32,
        bytes32
    ) external; // Only tokens that support permit

    function swap(address, uint256) external; // Only Avalanche bridge tokens

    function swapSupply(address) external view returns (uint256); // Only Avalanche bridge tokens

    function totalSupply() external view returns (uint256);
}

//
//            __               ___ ___    __            _  
//           (_  | | |\/| |\/|  |   |    (_ \    / /\  |_) 
//           __) |_| |  | |  | _|_  |    __) \/\/ /--\ |   
//

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


struct Query {
    address adapter;
    address tokenIn;
    address tokenOut;
    uint256 amountOut;
}
struct Offer {
    bytes amounts;
    bytes adapters;
    bytes path;
    uint256 gasEstimate;
}
struct FormattedOffer {
    uint256[] amounts;
    address[] adapters;
    address[] path;
    uint256 gasEstimate;
}
struct Trade {
    uint256 amountIn;
    uint256 amountOut;
    address[] path;
    address[] adapters;
}

interface ISummitRouter {

    event UpdatedTrustedTokens(address[] _newTrustedTokens);
    event UpdatedTokenVolumeMultipliers(address[] _tokens, uint256[] _pointMultipliers);
    event UpdatedTokenBonusMultipliers(address [] _tokens, uint256[] _multipliers);
    event UpdatedAdapters(address[] _newAdapters);
    event UpdatedVolumeAdapter(address _volumeAdapter);
    event UpdatedMinFee(uint256 _oldMinFee, uint256 _newMinFee);
    event UpdatedFeeClaimer(address _oldFeeClaimer, address _newFeeClaimer);
    event SummitSwap(address indexed _tokenIn, address indexed _tokenOut, uint256 _amountIn, uint256 _amountOut);

    // admin
    function setTrustedTokens(address[] memory _trustedTokens) external;
    function setAdapters(address[] memory _adapters) external;
    function setVolumeAdapter(address _volumeAdapter) external;
    function setFeeClaimer(address _claimer) external;
    function setMinFee(uint256 _fee) external;

    // misc
    function trustedTokensCount() external view returns (uint256);
    function adaptersCount() external view returns (uint256);
    function getTokenBonus(address _token) external view returns (uint256);

    // query

    function queryAdapter(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint8 _index
    ) external returns (uint256);

    function queryNoSplit(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint8[] calldata _options
    ) external view returns (Query memory);

    function queryNoSplit(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut
    ) external view returns (Query memory);

    function findBestPathWithGas(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint256 _maxSteps,
        uint256 _gasPrice
    ) external view returns (FormattedOffer memory);

    function findBestPath(
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut,
        uint256 _maxSteps
    ) external view returns (FormattedOffer memory);

    // swap

    function swapNoSplit(
        Trade calldata _trade,
        address _to,
        uint256 _fee
    ) external;

    function swapNoSplitFromNATIVE(
        Trade calldata _trade,
        address _to,
        uint256 _fee
    ) external payable;

    function swapNoSplitToNATIVE(
        Trade calldata _trade,
        address _to,
        uint256 _fee
    ) external; 

    function swapNoSplitWithPermit(
        Trade calldata _trade,
        address _to,
        uint256 _fee,
        uint256 _deadline,
        uint8 _v,
        bytes32 _r,
        bytes32 _s
    ) external;

    function swapNoSplitToNATIVEWithPermit(
        Trade calldata _trade,
        address _to,
        uint256 _fee,
        uint256 _deadline,
        uint8 _v,
        bytes32 _r,
        bytes32 _s
    ) external;

}

//
//            __               ___ ___    __            _  
//           (_  | | |\/| |\/|  |   |    (_ \    / /\  |_) 
//           __) |_| |  | |  | _|_  |    __) \/\/ /--\ |   
//

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

interface ISummitVolumeAdapter {

  event UpdatedRouter(address indexed _router);
  event UpdatedPointsContract(address indexed _pointsContract);

  function addVolume(address _add, uint256 _volume) external;
  function addAdapterVolume(address _adapter, uint256 _volume) external;
  function setRouter(address _router) external;
  function setPointsContract(address _pointsContract) external;
}

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

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

interface IWETHV2 is IERC20 {
    function withdraw(uint256 amount) external;
    function deposit() external payable;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/AccessControl.sol";

/**
 * @dev Contract module which extends the basic access control mechanism of Ownable
 * to include many maintainers, whom only the owner (DEFAULT_ADMIN_ROLE) may add and
 * remove.
 *
 * 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 this modifier:
 * `onlyMaintainer`, which can be applied to your functions to restrict their use to
 * the accounts with the role of maintainer.
 */

abstract contract Maintainable is AccessControl {
    bytes32 public constant MAINTAINER_ROLE = keccak256("MAINTAINER_ROLE");

    constructor() {
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _setupRole(MAINTAINER_ROLE, msg.sender);
    }

    function addMaintainer(address addedMaintainer) public virtual {
        grantRole(MAINTAINER_ROLE, addedMaintainer);
    }

    function removeMaintainer(address removedMaintainer) public virtual {
        revokeRole(MAINTAINER_ROLE, removedMaintainer);
    }

    function renounceRole(bytes32 role) public virtual {
        renounceRole(role, msg.sender);
    }

    function transferOwnership(address newOwner) public virtual {
        grantRole(DEFAULT_ADMIN_ROLE, newOwner);
        renounceRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }

    modifier onlyMaintainer() {
        require(hasRole(MAINTAINER_ROLE, msg.sender), "Maintainable: Caller is not a maintainer");
        _;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import "./SafeERC20.sol";
import "./Maintainable.sol";


abstract contract Recoverable is Maintainable {
    using SafeERC20 for IERC20;

    event Recovered(
        address indexed _asset, 
        uint amount
    );

    /**
     * @notice Recover ERC20 from contract
     * @param _tokenAddress token address
     * @param _tokenAmount amount to recover
     */
    function recoverERC20(address _tokenAddress, uint _tokenAmount) external onlyMaintainer {
        require(_tokenAmount > 0, "Nothing to recover");
        IERC20(_tokenAddress).safeTransfer(msg.sender, _tokenAmount);
        emit Recovered(_tokenAddress, _tokenAmount);
    }

    /**
     * @notice Recover native asset from contract
     * @param _amount amount
     */
    function recoverNATIVE(uint _amount) external onlyMaintainer {
        require(_amount > 0, "Nothing to recover");
        payable(msg.sender).transfer(_amount);
        emit Recovered(address(0), _amount);
    }

}

// This is a simplified version of OpenZepplin's SafeERC20 library
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import "../interface/IERC20.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 ERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    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'
        // solhint-disable-next-line max-line-length
        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 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.

        // A Solidity high level call has three parts:
        //  1. The target address is checked to verify it contains contract code
        //  2. The call itself is made, and success asserted
        //  3. The return value is decoded, which in turn checks the size of the returned data.
        // solhint-disable-next-line max-line-length

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "SafeERC20: low-level call failed");

        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.8.4;

import { Offer, FormattedOffer } from "../interface/ISummitRouter.sol";
import "./TypeConversion.sol";


library OfferUtils {
    using TypeConversion for address;
    using TypeConversion for uint256;
    using TypeConversion for bytes;

    function newOffer(
        uint _amountIn,
        address _tokenIn
    ) internal pure returns (Offer memory offer) {
        offer.amounts = _amountIn.toBytes();
        offer.path = _tokenIn.toBytes();
    }

    /**
     * Makes a deep copy of Offer struct
     */
    function clone(Offer memory _queries) internal pure returns (Offer memory) {
        return Offer(_queries.amounts, _queries.adapters, _queries.path, _queries.gasEstimate);
    }

    /**
     * Appends new elements to the end of Offer struct
     */
    function addToTail(
        Offer memory _queries,
        uint256 _amount,
        address _adapter,
        address _tokenOut,
        uint256 _gasEstimate
    ) internal pure {
        _queries.path = bytes.concat(_queries.path, _tokenOut.toBytes());
        _queries.adapters = bytes.concat(_queries.adapters, _adapter.toBytes());
        _queries.amounts = bytes.concat(_queries.amounts, _amount.toBytes());
        _queries.gasEstimate += _gasEstimate;
    }

    /**
     * Formats elements in the Offer object from byte-arrays to integers and addresses
     */
    function format(Offer memory _queries) internal pure returns (FormattedOffer memory) {
        return
            FormattedOffer(
                _queries.amounts.toUints(),
                _queries.adapters.toAddresses(),
                _queries.path.toAddresses(),
                _queries.gasEstimate
            );
    }

    function getTokenOut(
        Offer memory _offer
    ) internal pure returns (address tokenOut) {
        tokenOut = _offer.path.toAddress(_offer.path.length);  // Last 32 bytes
    }

    function getAmountOut(
        Offer memory _offer
    ) internal pure returns (uint amountOut) {
        amountOut = _offer.amounts.toUint(_offer.path.length);  // Last 32 bytes
    }

}

library FormattedOfferUtils {
    using TypeConversion for address;
    using TypeConversion for uint256;
    using TypeConversion for bytes;

    /**
     * Appends new elements to the end of FormattedOffer
     */
    function addToTail(
        FormattedOffer memory offer, 
        uint256 amountOut, 
        address wrapper,
        address tokenOut,
        uint256 gasEstimate
    ) internal pure {
        offer.amounts = bytes.concat(abi.encodePacked(offer.amounts), amountOut.toBytes()).toUints();
        offer.adapters = bytes.concat(abi.encodePacked(offer.adapters), wrapper.toBytes()).toAddresses();
        offer.path = bytes.concat(abi.encodePacked(offer.path), tokenOut.toBytes()).toAddresses();
        offer.gasEstimate += gasEstimate;
    }

    /**
     * Appends new elements to the beginning of FormattedOffer
     */
    function addToHead(
        FormattedOffer memory offer, 
        uint256 amountOut, 
        address wrapper,
        address tokenOut,
        uint256 gasEstimate
    ) internal pure {
        offer.amounts = bytes.concat(amountOut.toBytes(), abi.encodePacked(offer.amounts)).toUints();
        offer.adapters = bytes.concat(wrapper.toBytes(), abi.encodePacked(offer.adapters)).toAddresses();
        offer.path = bytes.concat(tokenOut.toBytes(), abi.encodePacked(offer.path)).toAddresses();
        offer.gasEstimate += gasEstimate;
    }

    function getAmountOut(FormattedOffer memory offer) internal pure returns (uint256) {
        return offer.amounts[offer.amounts.length - 1];
    }

}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;


library TypeConversion {

    function toBytes12(address x) internal pure returns (bytes12 y) {
        assembly { y := x }
    }

    function toBytes32(address x) internal pure returns (bytes32 y) {
        assembly { y := x }
    }

    function toAddress(bytes32 x) internal pure returns (address y) {
        assembly { y := x }
    }

    function toBytes(address x) internal pure returns (bytes memory y) {
        y = new bytes(32);
        assembly { mstore(add(y, 32), x) }
    }

    function toBytes(bytes32 x) internal pure returns (bytes memory y) {
        y = new bytes(32);
        assembly { mstore(add(y, 32), x) }
    }

    function toBytes(uint x) internal pure returns (bytes memory y) {
        y = new bytes(32);
        assembly { mstore(add(y, 32), x) }
    }

    function toAddress(
        bytes memory x,
        uint offset
    ) internal pure returns (address y) {
        assembly { y := mload(add(x, offset)) }
    }

    function toUint(
        bytes memory x,
        uint offset
    ) internal pure returns (uint y) {
        assembly { y := mload(add(x, offset)) }
    }

    function toBytes12(
        bytes memory x,
        uint offset
    ) internal pure returns (bytes12 y) {
        assembly { y := mload(add(x, offset)) }
    }

    function toBytes32(
        bytes memory x,
        uint offset
    ) internal pure returns (bytes32 y) {
        assembly { y := mload(add(x, offset)) }
    }

    function toAddresses(
        bytes memory xs
    ) internal pure returns (address[] memory ys) {
        ys = new address[](xs.length/32);
        for (uint i=0; i < xs.length/32; i++) {
            ys[i] = toAddress(xs, i*32 + 32);
        }
    }

    function toUints(
        bytes memory xs
    ) internal pure returns (uint[] memory ys) {
        ys = new uint[](xs.length/32);
        for (uint i=0; i < xs.length/32; i++) {
            ys[i] = toUint(xs, i*32 + 32);
        }
    }

    function toBytes32s(
        bytes memory xs
    ) internal pure returns (bytes32[] memory ys) {
        ys = new bytes32[](xs.length/32);
        for (uint i=0; i < xs.length/32; i++) {
            ys[i] = toBytes32(xs, i*32 + 32);
        }
    }

}

{
  "optimizer": {
    "enabled": true,
    "runs": 999
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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Trade","name":"_trade","type":"tuple"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_fee","type":"uint256"},{"internalType":"uint256","name":"_deadline","type":"uint256"},{"internalType":"uint8","name":"_v","type":"uint8"},{"internalType":"bytes32","name":"_r","type":"bytes32"},{"internalType":"bytes32","name":"_s","type":"bytes32"}],"name":"swapNoSplitWithPermit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"trustedTokensCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

-----Decoded View---------------
Arg [0] : _adapters (address[]): 
Arg [1] : _trustedTokens (address[]): 0x4300000000000000000000000000000000000003,0x4300000000000000000000000000000000000004
Arg [2] : _feeClaimer (address): 0x3a7679E3662bC7c2EB2B1E71FA221dA430c6f64B
Arg [3] : _wrapped_native (address): 0x4300000000000000000000000000000000000004

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 0000000000000000000000003a7679e3662bc7c2eb2b1e71fa221da430c6f64b
Arg [3] : 0000000000000000000000004300000000000000000000000000000000000004
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [6] : 0000000000000000000000004300000000000000000000000000000000000003
Arg [7] : 0000000000000000000000004300000000000000000000000000000000000004