Contract

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "../SwapTokenBase.sol";

contract SwapTokenETH is SwapTokenBase {
    constructor(uint256 _fee, address _addr) SwapTokenBase(_fee, _addr) {}

    function UNISWAP_V2_ROUTER() internal pure override returns (IUniswapV2Router02) {
        return IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    }

    function UNISWAP_FACTORY() internal pure override returns (IUniswapV2Factory) {
        return IUniswapV2Factory(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "./interfaces/IWETH.sol";
import "./interfaces/IBeneficiaryBase.sol";

abstract contract SwapTokenBase is AccessControl {
    using SafeERC20 for IERC20;
    bytes32 public constant DEVELOPER = keccak256("DEVELOPER");
    bytes32 public constant ADMIN = keccak256("ADMIN");
    address internal constant deadAddress = 0x000000000000000000000000000000000000dEaD;
    address internal immutable WETH;
    address public immutable wallet;
    uint256 public immutable fee;

    struct limitOrder {
        address _from;
        address _tokenIn;
        uint256 _amountIn;
        address _tokenOut;
        uint256 _amountOut;
        uint256 _expires;
    }

    limitOrder[] public limitOrders;
    event limitOrderCreated(
        address _from,
        address _tokenIn,
        uint256 _amountIn,
        address _tokenOut,
        uint256 _amountOut,
        uint256 _arrayIndex,
        uint256 _expires
    );

    event limitOrderExecuted(uint256 _orderIndex);
    event limitOrderExpired(uint256 _orderIndex);

    modifier validate(address[] memory path) {
        require(path.length >= 2, "INVALID_PATH");
        _;
    }

    constructor(uint256 _fee, address _addr) {
        WETH = UNISWAP_V2_ROUTER().WETH();
        fee = _fee;
        wallet = _addr;
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _grantRole(ADMIN, msg.sender);
        _grantRole(DEVELOPER, msg.sender);
    }

    function VOLT() public pure virtual returns (address) {
        return 0x7db5af2B9624e1b3B4Bb69D6DeBd9aD1016A58Ac;
    }

    function UNISWAP_V2_ROUTER() internal pure virtual returns (IUniswapV2Router02);

    function UNISWAP_FACTORY() internal pure virtual returns (IUniswapV2Factory);

    function burn(uint256 _feeAmount, address[] memory _path) internal {
        address tokenIn = _path[0];
        address tokenOut = _path[_path.length - 1];
        if (tokenIn == WETH) {
            _safeTransfer(wallet, _feeAmount);
        } else if (tokenOut == WETH) {
            if (tokenIn == VOLT()) {
                IERC20(tokenIn).safeTransfer(deadAddress, _feeAmount);
            } else {
                uint256 _firstFeeAmount = _feeAmount / 2;
                UNISWAP_V2_ROUTER().swapExactTokensForETHSupportingFeeOnTransferTokens(
                    _firstFeeAmount,
                    0,
                    _path,
                    wallet,
                    block.timestamp
                );

                uint256 _secondFeeAmount = _feeAmount - _firstFeeAmount;
                if (!IBeneficiaryBase(wallet).tokenWhitelist(tokenIn)) {
                    IERC20(tokenIn).safeTransfer(deadAddress, _secondFeeAmount);
                } else {
                    UNISWAP_V2_ROUTER().swapExactTokensForETHSupportingFeeOnTransferTokens(
                        _secondFeeAmount,
                        0,
                        _path,
                        wallet,
                        block.timestamp
                    );
                }
            }
        } else {
            if (tokenIn == VOLT()) {
                IERC20(tokenIn).safeTransfer(deadAddress, _feeAmount);
            } else {
                uint256 _firstFeeAmount = _feeAmount / 2;
                uint256 _secondFeeAmount = _feeAmount - _firstFeeAmount;

                address[] memory wethPath = _getWETHPath(_path);

                if (wethPath.length > 0) {
                    UNISWAP_V2_ROUTER().swapExactTokensForETHSupportingFeeOnTransferTokens(
                        _firstFeeAmount,
                        0,
                        wethPath,
                        wallet,
                        block.timestamp
                    );
                } else {
                    IERC20(tokenIn).safeTransfer(wallet, _firstFeeAmount);
                }
                bool whitelistIn = IBeneficiaryBase(wallet).tokenWhitelist(tokenIn);
                bool whitelistOut = IBeneficiaryBase(wallet).tokenWhitelist(tokenOut);
                if (!whitelistIn && whitelistOut) {
                    IERC20(tokenIn).safeTransfer(deadAddress, _secondFeeAmount);
                } else if (!whitelistOut) {
                    UNISWAP_V2_ROUTER().swapExactTokensForTokensSupportingFeeOnTransferTokens(
                        _secondFeeAmount,
                        0,
                        _path,
                        deadAddress,
                        block.timestamp
                    );
                }
            }
        }
    }

    function swapTokenForToken(
        uint256 _amountIn,
        uint256 _amountOutMin,
        bool _isLimitOrder,
        address _dest,
        address[] memory _path
    ) public validate(_path) {
        address tokenIn = _path[0];
        uint256 _realAmountIn;
        if (_isLimitOrder) {
            _realAmountIn = _amountIn;
        } else {
            uint256 prev_balance_tokenIn = IERC20(tokenIn).balanceOf(address(this));
            IERC20(tokenIn).safeTransferFrom(_dest, address(this), _amountIn);
            uint256 curr_balance_tokenIn = IERC20(tokenIn).balanceOf(address(this));
            _realAmountIn = curr_balance_tokenIn - prev_balance_tokenIn; // handle fee on transfer tokens
        }
        IERC20(tokenIn).safeIncreaseAllowance(address(UNISWAP_V2_ROUTER()), _realAmountIn);

        uint256 feeAmount = (_realAmountIn * fee) / 10000;
        uint256 amountInSub = _realAmountIn - feeAmount;
        UNISWAP_V2_ROUTER().swapExactTokensForTokensSupportingFeeOnTransferTokens(
            amountInSub,
            _amountOutMin,
            _path,
            _dest,
            block.timestamp
        );
        burn(feeAmount, _path);
    }

    function swapTokenForExactToken(
        uint256 _amountOut,
        uint256 _amountInMax,
        address[] memory _path
    ) public validate(_path) {
        address tokenIn = _path[0];

        IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), _amountInMax);
        uint256 adjustedAmountIn = IERC20(tokenIn).balanceOf(address(this)); // handle fee on transfer tokens
        IERC20(tokenIn).safeIncreaseAllowance(address(UNISWAP_V2_ROUTER()), adjustedAmountIn);
        uint256 adjustedFee = (adjustedAmountIn * fee) / 10000;
        uint256[] memory amounts = UNISWAP_V2_ROUTER().swapTokensForExactTokens(
            _amountOut,
            adjustedAmountIn - adjustedFee,
            _path,
            msg.sender,
            block.timestamp
        );

        uint256 realAmountIn = amounts[0];
        uint256 feeAmount = (realAmountIn * fee) / 10000;
        uint256 refundAmount = adjustedAmountIn - realAmountIn - feeAmount;
        if (refundAmount > 0) {
            IERC20(tokenIn).safeTransfer(msg.sender, refundAmount);
        }
        burn(feeAmount, _path);
    }

    function swapTokenForETH(
        uint256 _amountIn,
        uint256 _amountOutMin,
        bool _isLimitOrder,
        address _dest,
        address[] memory _path
    ) public validate(_path) {
        address tokenIn = _path[0];
        uint256 adjustedAmountIn;
        if (_isLimitOrder) {
            adjustedAmountIn = _amountIn;
        } else {
            uint256 prev_balance_tokenIn = IERC20(tokenIn).balanceOf(address(this));
            IERC20(tokenIn).safeTransferFrom(_dest, address(this), _amountIn);
            uint256 curr_balance_tokenIn = IERC20(tokenIn).balanceOf(address(this));
            adjustedAmountIn = curr_balance_tokenIn - prev_balance_tokenIn; // handle fee on transfer tokens
        }

        if (tokenIn == WETH) {
            IWETH(WETH).withdraw(adjustedAmountIn);
            _safeTransfer(_dest, adjustedAmountIn);
        } else {
            IERC20(tokenIn).safeIncreaseAllowance(address(UNISWAP_V2_ROUTER()), adjustedAmountIn);
            uint256 feeAmount = (adjustedAmountIn * fee) / 10000;
            uint256 amountInSub = adjustedAmountIn - feeAmount;
            UNISWAP_V2_ROUTER().swapExactTokensForETHSupportingFeeOnTransferTokens(
                amountInSub,
                _amountOutMin,
                _path,
                _dest,
                block.timestamp
            );
            burn(feeAmount, _path);
        }
    }

    function swapTokenForExactETH(
        uint256 _amountOut,
        uint256 _amountInMax,
        address[] memory _path
    ) public validate(_path) {
        address tokenIn = _path[0];
        IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), _amountInMax);
        uint256 adjustedAmountIn = IERC20(tokenIn).balanceOf(address(this)); // handle fee on transfer tokens
        IERC20(tokenIn).safeIncreaseAllowance(address(UNISWAP_V2_ROUTER()), adjustedAmountIn);

        if (tokenIn == WETH) {
            IWETH(WETH).withdraw(adjustedAmountIn);
            _safeTransfer(msg.sender, adjustedAmountIn);
        } else {
            IERC20(tokenIn).safeIncreaseAllowance(address(UNISWAP_V2_ROUTER()), adjustedAmountIn);
            uint256 adjustedFee = (adjustedAmountIn * fee) / 10000;
            uint256[] memory amounts = UNISWAP_V2_ROUTER().swapTokensForExactETH(
                _amountOut,
                adjustedAmountIn - adjustedFee,
                _path,
                msg.sender,
                block.timestamp
            );
            uint256 realAmountIn = amounts[0];
            uint256 feeAmount = (realAmountIn * fee) / 10000;
            uint256 refundAmount = adjustedAmountIn - realAmountIn - feeAmount;
            if (refundAmount > 0) {
                IERC20(tokenIn).safeTransfer(msg.sender, refundAmount);
            }
            burn(feeAmount, _path);
        }
    }

    function swapETHforToken(
        uint256 _amountOutMin,
        address _dest,
        address[] memory _path
    ) public payable validate(_path) {
        address tokenOut = _path[_path.length - 1];
        uint256 amountIn = msg.value;

        if (tokenOut == WETH) {
            IWETH(WETH).deposit{value: amountIn}();
            IERC20(WETH).transfer(_dest, amountIn);
        } else {
            uint256 feeAmount = (amountIn * fee) / 10000;
            uint256 amountInSub = amountIn - feeAmount;
            UNISWAP_V2_ROUTER().swapExactETHForTokensSupportingFeeOnTransferTokens{value: amountInSub}(
                _amountOutMin,
                _path,
                _dest,
                block.timestamp
            );
            burn(feeAmount, _path);
        }
    }

    function swapETHforExactToken(uint256 _amountOut, address[] memory _path) public payable validate(_path) {
        address tokenOut = _path[_path.length - 1];
        uint256 amountIn = msg.value;

        if (tokenOut == WETH) {
            IWETH(WETH).deposit{value: amountIn}();
            IERC20(WETH).transfer(msg.sender, amountIn);
        } else {
            uint256 feeAmount = (amountIn * fee) / 10000;
            uint256 amountInSub = amountIn - feeAmount;
            uint256[] memory amounts = UNISWAP_V2_ROUTER().swapETHForExactTokens{value: amountInSub}(
                _amountOut,
                _path,
                msg.sender,
                block.timestamp
            );
            uint256 refund = amountInSub - amounts[0];
            if (refund > 0) {
                _safeTransfer(msg.sender, refund);
            }
            burn(feeAmount, _path);
        }
    }

    function getPair(address _tokenIn, address _tokenOut) external view returns (address) {
        return UNISWAP_FACTORY().getPair(_tokenIn, _tokenOut);
    }

    function getAmountIn(uint256 _amountOut, address[] memory _path) public view returns (uint256) {
        uint256[] memory amountsIn = UNISWAP_V2_ROUTER().getAmountsIn(_amountOut, _path);
        return amountsIn[0];
    }

    function getAmountOutMinWithFees(uint256 _amountIn, address[] memory _path) public view returns (uint256) {
        uint256 feeAmount = (_amountIn * fee) / 10000;
        uint256 amountInSub = _amountIn - feeAmount;

        uint256[] memory amountOutMins = UNISWAP_V2_ROUTER().getAmountsOut(amountInSub, _path);
        return amountOutMins[amountOutMins.length - 1];
    }

    function _getWETHPath(address[] memory _path) internal view returns (address[] memory wethPath) {
        uint256 index = 0;
        for (uint256 i = 0; i < _path.length; i++) {
            if (_path[i] == WETH) {
                index = i + 1;
                break;
            }
        }
        wethPath = new address[](index);
        for (uint256 i = 0; i < index; i++) {
            wethPath[i] = _path[i];
        }
    }

    function _safeTransfer(address _to, uint256 _amount) internal {
        (bool sent, ) = _to.call{value: _amount}("");
        require(sent, "Failed to send Ether");
    }

    /*
     *   start limit order functions
     */

    // requires that msg.sender approves this contract to move his tokens
    // amountIn and amountOut may be reduced if token has fees on transfer
    function sendLimitOrder(
        address tokenIn,
        uint256 amountIn,
        address tokenOut,
        uint256 amountOut,
        uint256 expires
    ) external payable {
        require(expires > block.timestamp, "expires");
        limitOrder memory order;
        if (msg.value > 0) {
            order = limitOrder(msg.sender, address(0), msg.value, tokenOut, amountOut, expires);
            limitOrders.push(order);
            emit limitOrderCreated(
                msg.sender,
                address(0),
                msg.value,
                tokenOut,
                amountOut,
                limitOrders.length > 0 ? limitOrders.length - 1 : 0,
                expires
            );
        } else {
            uint256 prev_balance = IERC20(tokenIn).balanceOf(address(this));

            IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), amountIn);
            uint256 curr_balance = IERC20(tokenIn).balanceOf(address(this));
            order = limitOrder(
                msg.sender,
                tokenIn,
                curr_balance - prev_balance, // I do this to take into consideration fees on transfers
                // which can make the amountIn less than the real amount exchanged
                tokenOut,
                amountOut,
                expires
            );
            limitOrders.push(order);
            emit limitOrderCreated(
                msg.sender,
                tokenIn,
                curr_balance - prev_balance,
                tokenOut,
                amountOut,
                limitOrders.length > 0 ? limitOrders.length - 1 : 0,
                expires
            );
        }
    }

    function isExecutableLimitOrder(uint256 orderIndex, address[] memory _path) public view returns (bool) {
        limitOrder memory order = limitOrders[orderIndex];
        uint256 amountOutMin = getAmountOutMinWithFees(
            order._amountIn,
            // order._tokenIn == address(0) ? UNISWAP_V2_ROUTER().WETH() : order._tokenIn,
            // order._tokenOut == address(0) ? UNISWAP_V2_ROUTER().WETH() : order._tokenOut
            _path
        );
        return amountOutMin >= order._amountOut;
    }

    function executeLimitOrder(uint256 _orderIndex, address[] memory _path) public {
        limitOrder memory order = limitOrders[_orderIndex];
        uint256 amountOutMin = getAmountOutMinWithFees(
            order._amountIn,
            // order._tokenIn == address(0) ? UNISWAP_V2_ROUTER().WETH() : order._tokenIn,
            // order._tokenOut == address(0) ? UNISWAP_V2_ROUTER().WETH() : order._tokenOut
            _path
        );
        if (amountOutMin >= order._amountOut && order._expires >= block.timestamp) {
            if (order._tokenIn == address(0)) {
                this.swapETHforToken{value: order._amountIn}(order._amountOut, order._from, _path);
            } else if (order._tokenOut == address(0)) {
                this.swapTokenForETH(order._amountIn, order._amountOut, true, order._from, _path);
            } else {
                this.swapTokenForToken(order._amountIn, order._amountOut, true, order._from, _path);
            }

            limitOrders[_orderIndex] = limitOrders[limitOrders.length - 1];
            limitOrders.pop();

            emit limitOrderExecuted(_orderIndex);
        } else if (order._expires < block.timestamp) {
            limitOrders[_orderIndex] = limitOrders[limitOrders.length - 1];
            limitOrders.pop();
            emit limitOrderExpired(_orderIndex);
        }
    }

    function getLimitOrdersCount() public view returns (uint256) {
        return limitOrders.length;
    }

    /*
     *   end limit order functions
     */

    function getTokenDecimals(address _addr) public view returns (uint8) {
        return IERC20Metadata(_addr).decimals();
    }

    receive() external payable {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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:
 *
 * ```
 * 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}:
 *
 * ```
 * 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.
 */
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(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

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

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

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

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

        _revokeRole(role, account);
    }

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-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;

    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));
    }

    /**
     * @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));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    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");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

pragma solidity >=0.6.2;

import './IUniswapV2Router01.sol';

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

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

pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

interface IWETH {
    function deposit() external payable;

    function withdraw(uint256) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

interface IBeneficiaryBase {
    function burn(uint256 _amountOutMin) external;

    function rescue(address _token) external;

    function tokenWhitelist(address _addr) external view returns (bool);
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_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) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @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] = _HEX_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);
    }
}

// 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 v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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
     * ====
     *
     * [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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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);
            }
        }
    }
}

pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

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

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"uint256","name":"_fee","type":"uint256"},{"internalType":"address","name":"_addr","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_from","type":"address"},{"indexed":false,"internalType":"address","name":"_tokenIn","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amountIn","type":"uint256"},{"indexed":false,"internalType":"address","name":"_tokenOut","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amountOut","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_arrayIndex","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_expires","type":"uint256"}],"name":"limitOrderCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_orderIndex","type":"uint256"}],"name":"limitOrderExecuted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_orderIndex","type":"uint256"}],"name":"limitOrderExpired","type":"event"},{"inputs":[],"name":"ADMIN","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DEVELOPER","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"VOLT","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"_orderIndex","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"executeLimitOrder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"fee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountOut","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"getAmountIn","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountIn","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"getAmountOutMinWithFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLimitOrdersCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_tokenIn","type":"address"},{"internalType":"address","name":"_tokenOut","type":"address"}],"name":"getPair","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"}],"name":"getTokenDecimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"orderIndex","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"isExecutableLimitOrder","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"limitOrders","outputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_tokenIn","type":"address"},{"internalType":"uint256","name":"_amountIn","type":"uint256"},{"internalType":"address","name":"_tokenOut","type":"address"},{"internalType":"uint256","name":"_amountOut","type":"uint256"},{"internalType":"uint256","name":"_expires","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"expires","type":"uint256"}],"name":"sendLimitOrder","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountOut","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"swapETHforExactToken","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountOutMin","type":"uint256"},{"internalType":"address","name":"_dest","type":"address"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"swapETHforToken","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountIn","type":"uint256"},{"internalType":"uint256","name":"_amountOutMin","type":"uint256"},{"internalType":"bool","name":"_isLimitOrder","type":"bool"},{"internalType":"address","name":"_dest","type":"address"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"swapTokenForETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountOut","type":"uint256"},{"internalType":"uint256","name":"_amountInMax","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"swapTokenForExactETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountOut","type":"uint256"},{"internalType":"uint256","name":"_amountInMax","type":"uint256"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"swapTokenForExactToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amountIn","type":"uint256"},{"internalType":"uint256","name":"_amountOutMin","type":"uint256"},{"internalType":"bool","name":"_isLimitOrder","type":"bool"},{"internalType":"address","name":"_dest","type":"address"},{"internalType":"address[]","name":"_path","type":"address[]"}],"name":"swapTokenForToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wallet","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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000000000000000000000000000000000000000000000000000000000000003200000000000000000000000033771df3ca1ca26d7eff1d0b927de09903046a5d

-----Decoded View---------------
Arg [0] : _fee (uint256): 50
Arg [1] : _addr (address): 0x33771dF3Ca1ca26D7eff1D0B927de09903046A5d

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000032
Arg [1] : 00000000000000000000000033771df3ca1ca26d7eff1d0b927de09903046a5d