Zapper.sol

// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

// Part: IHyperswapRouter01

interface IHyperswapRouter01 {
    function factory() external pure returns (address);
    function WFTM() 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 addLiquidityFTM(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountFTMMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountFTM, 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 removeLiquidityFTM(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountFTMMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountFTM);
    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 removeLiquidityFTMWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountFTMMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountFTM);
    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 swapExactFTMForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactFTM(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForFTM(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapFTMForExactTokens(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);
}

// Part: IUniswapV2Pair

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

// Part: IUniswapV2Router01

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

// Part: OpenZeppelin/openzeppelin-contracts@4.1.0/IERC20

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}


// Part: IVault

interface IVault is IERC20 {
    function deposit(uint256 amount) external;
    function withdraw(uint256 shares) external;
    function want() external pure returns (address);
}

// Part: OpenZeppelin/openzeppelin-contracts@4.1.0/Address

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// Part: OpenZeppelin/openzeppelin-contracts@4.1.0/SafeMath

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// Part: TransferHelper

// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    function safeApprove(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
    }

    function safeTransfer(address token, address to, uint value) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
    }

    function safeTransferFrom(address token, address from, address to, uint value) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
    }

    function safeTransferETH(address to, uint value) internal {
        (bool success,) = to.call{value:value}(new bytes(0));
        require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
    }
}

// Part: OpenZeppelin/openzeppelin-contracts@4.1.0/SafeERC20

/**
 * @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'
        // 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));
    }

    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));
        }
    }

    /**
     * @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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: 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) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


// File: Ownable.sol

pragma solidity ^0.8.0;

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

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

// File: IZap.sol

interface IZap {
    function estimateZapInToken(address _from, address _to, address _router, uint _amt) external view returns (uint256, uint256);
    function swapToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external;
    function swapToNative(address _from, uint amount, address routerAddr, address _recipient) external;
    function zapIn(address _to, address routerAddr, address _recipient) external payable;
    function zapInToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external;
    function zapAcross(address _from, uint amount, address _toRouter, address _recipient) external;
    function zapOut(address _from, uint amount, address routerAddr, address _recipient) external;
    function zapOutToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external;
}


// File: Zap.sol

contract Zap is Ownable, IZap {
    using SafeMath for uint;
    using SafeERC20 for IERC20;

    /* ========== STATE VARIABLES ========== */

    address private WNATIVE;
    mapping(address => mapping(address => address)) private tokenBridgeForRouter;
    mapping(address => bool) public isFeeOnTransfer;

    mapping (address => bool) public useNativeRouter;

    constructor(address _WNATIVE) Ownable() {
       WNATIVE = _WNATIVE;
    }

    /* ========== External Functions ========== */

    receive() external payable {}

    function zapInToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external override {
        _approveTokenIfNeeded(_from, routerAddr);

        if (isFeeOnTransfer[_from]) {
            IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
            _swapTokenToLP(_from, IERC20(_from).balanceOf(address(this)), _to, _recipient, routerAddr);
            return;
        } else {
            // From an ERC20 to an LP token, through specified router, going through base asset if necessary
            IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
            // we'll need this approval to add liquidity
            _approveTokenIfNeeded(_from, routerAddr);
            _swapTokenToLP(_from, amount, _to, _recipient, routerAddr);
            return;
        }
    }

    function estimateZapInToken(address _from, address _to, address _router, uint _amt) public view override returns (uint256, uint256) {
        // get pairs for desired lp
        if (_from == IUniswapV2Pair(_to).token0() || _from == IUniswapV2Pair(_to).token1()) { // check if we already have one of the assets
            // if so, we're going to sell half of _from for the other token we need
            // figure out which token we need, and approve
            address other = _from == IUniswapV2Pair(_to).token0() ? IUniswapV2Pair(_to).token1() : IUniswapV2Pair(_to).token0();
            // calculate amount of _from to sell
            uint sellAmount = _amt.div(2);
            // execute swap
            uint otherAmount = _estimateSwap(_from, sellAmount, other, _router);
            if (_from == IUniswapV2Pair(_to).token0()) {
                return (sellAmount, otherAmount);
            } else {
                return (otherAmount, sellAmount);
            }
        } else {
            // go through native token for highest liquidity
            uint nativeAmount = _from == WNATIVE ? _amt : _estimateSwap(_from, _amt, WNATIVE, _router);
            if (WNATIVE == IUniswapV2Pair(_to).token0()) {
                return (nativeAmount.div(2), _estimateSwap(WNATIVE, nativeAmount.div(2), IUniswapV2Pair(_to).token1(), _router ));
            }
            if (WNATIVE == IUniswapV2Pair(_to).token1()) {
                return (_estimateSwap(WNATIVE, nativeAmount.div(2), IUniswapV2Pair(_to).token0(), _router ), nativeAmount.div(2));
            }
                return (_estimateSwap(WNATIVE, nativeAmount.div(2), IUniswapV2Pair(_to).token0(), _router ), _estimateSwap(WNATIVE, nativeAmount.div(2), IUniswapV2Pair(_to).token1(), _router));
        }
    }

    function zapIn(address _to, address routerAddr, address _recipient) external payable override {
        // from Native to an LP token through the specified router
        _swapNativeToLP(_to, msg.value, _recipient, routerAddr);
    }

    function zapAcross(address _from, uint amount, address _toRouter, address _recipient) external override {
        IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);

        IUniswapV2Pair pair = IUniswapV2Pair(_from);
        _approveTokenIfNeeded(pair.token0(), _toRouter);
        _approveTokenIfNeeded(pair.token1(), _toRouter);

        IERC20(_from).safeTransfer(_from, amount);
        uint amt0;
        uint amt1;
        (amt0, amt1) = pair.burn(address(this));
        IUniswapV2Router01(_toRouter).addLiquidity(pair.token0(), pair.token1(), amt0, amt1, 0, 0, _recipient, block.timestamp);
        
        //check for any left-over tokens when creating LP, and if there are any, send back to user instead of retaining the difference
        uint bal0 = IERC20(pair.token0()).balanceOf(address(this));
        if(bal0>0){
            IERC20(pair.token0()).safeTransfer(msg.sender, bal0);
        }
        uint bal1 = IERC20(pair.token1()).balanceOf(address(this));
        if(bal1>0){
            IERC20(pair.token1()).safeTransfer(msg.sender, bal1);
        }
    }

    function zapOut(address _from, uint amount, address routerAddr, address _recipient) external override {
        // from an LP token to Native through specified router
        // take the LP token
        IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
        _approveTokenIfNeeded(_from, routerAddr);

        // get pairs for LP
        address token0 = IUniswapV2Pair(_from).token0();
        address token1 = IUniswapV2Pair(_from).token1();
        _approveTokenIfNeeded(token0, routerAddr);
        _approveTokenIfNeeded(token1, routerAddr);
        // check if either is already native token
        if (token0 == WNATIVE || token1 == WNATIVE) {
            // if so, we only need to swap one, figure out which and how much
            address token = token0 != WNATIVE ? token0 : token1;
            uint amtToken;
            uint amtETH;
            (amtToken, amtETH) = IUniswapV2Router01(routerAddr).removeLiquidityETH(token, amount, 0, 0, address(this), block.timestamp);
            // swap with msg.sender as recipient, so they already get the Native
            _swapTokenForNative(token, amtToken, _recipient, routerAddr);
            // send other half of Native
            TransferHelper.safeTransferETH(_recipient, amtETH);
        } else {
            // convert both for Native with msg.sender as recipient
            uint amt0;
            uint amt1;
            (amt0, amt1) = IUniswapV2Router01(routerAddr).removeLiquidity(token0, token1, amount, 0, 0, address(this), block.timestamp);
            _swapTokenForNative(token0, amt0, _recipient, routerAddr);
            _swapTokenForNative(token1, amt1, _recipient, routerAddr);
        }
    }

    function zapOutToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external override {
        // from an LP token to an ERC20 through specified router
        IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
        _approveTokenIfNeeded(_from, routerAddr);

        address token0 = IUniswapV2Pair(_from).token0();
        address token1 = IUniswapV2Pair(_from).token1();
        _approveTokenIfNeeded(token0, routerAddr);
        _approveTokenIfNeeded(token1, routerAddr);
        uint amt0;
        uint amt1;
        (amt0, amt1) = IUniswapV2Router01(routerAddr).removeLiquidity(token0, token1, amount, 0, 0, address(this), block.timestamp);
        if (token0 != _to) {
            amt0 = _swap(token0, amt0, _to, address(this), routerAddr);
        }
        if (token1 != _to) {
            amt1 = _swap(token1, amt1, _to, address(this), routerAddr);
        }
        IERC20(_to).safeTransfer(_recipient, amt0.add(amt1));
    }

    function swapToken(address _from, uint amount, address _to, address routerAddr, address _recipient) external override {
        IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
        _approveTokenIfNeeded(_from, routerAddr);
        _swap(_from, amount, _to, _recipient, routerAddr);
    }

    function swapToNative(address _from, uint amount, address routerAddr, address _recipient) external override {
        IERC20(_from).safeTransferFrom(msg.sender, address(this), amount);
        _approveTokenIfNeeded(_from, routerAddr);
        _swapTokenForNative(_from, amount, _recipient, routerAddr);
    }


    /* ========== Private Functions ========== */

    function _approveTokenIfNeeded(address token, address router) private {
        if (IERC20(token).allowance(address(this), router) == 0) {
            IERC20(token).safeApprove(router, type(uint).max);
        }
    }

    function _swapTokenToLP(address _from, uint amount, address _to, address recipient, address routerAddr) private returns (uint) {
                // get pairs for desired lp
        if (_from == IUniswapV2Pair(_to).token0() || _from == IUniswapV2Pair(_to).token1()) { // check if we already have one of the assets
            // if so, we're going to sell half of _from for the other token we need
            // figure out which token we need, and approve
            address other = _from == IUniswapV2Pair(_to).token0() ? IUniswapV2Pair(_to).token1() : IUniswapV2Pair(_to).token0();
            _approveTokenIfNeeded(other, routerAddr);
            // calculate amount of _from to sell
            uint sellAmount = amount.div(2);
            // execute swap
            uint otherAmount = _swap(_from, sellAmount, other, address(this), routerAddr);
            uint liquidity;
            ( , , liquidity) = IUniswapV2Router01(routerAddr).addLiquidity(_from, other, amount.sub(sellAmount), otherAmount, 0, 0, recipient, block.timestamp);
            return liquidity;
        } else {
            // go through native token for highest liquidity
            uint nativeAmount = _swapTokenForNative(_from, amount, address(this), routerAddr);
            return _swapNativeToLP(_to, nativeAmount, recipient, routerAddr);
        }
    }

    function _swapNativeToLP(address _LP, uint amount, address recipient, address routerAddress) private returns (uint) {
            // LP
            IUniswapV2Pair pair = IUniswapV2Pair(_LP);
            address token0 = pair.token0();
            address token1 = pair.token1();
            uint liquidity;
            if (token0 == WNATIVE || token1 == WNATIVE) {
                address token = token0 == WNATIVE ? token1 : token0;
                ( , , liquidity) = _swapHalfNativeAndProvide(token, amount, routerAddress, recipient);
            } else {
                ( , , liquidity) = _swapNativeToEqualTokensAndProvide(token0, token1, amount, routerAddress, recipient);
            }
            return liquidity;
    }

    function _swapHalfNativeAndProvide(address token, uint amount, address routerAddress, address recipient) private returns (uint, uint, uint) {
            uint swapValue = amount.div(2);
            uint tokenAmount = _swapNativeForToken(token, swapValue, address(this), routerAddress);
            _approveTokenIfNeeded(token, routerAddress);
            if (useNativeRouter[routerAddress]) {
                IHyperswapRouter01 router = IHyperswapRouter01(routerAddress);
                return router.addLiquidityFTM{value : amount.sub(swapValue)}(token, tokenAmount, 0, 0, recipient, block.timestamp);
            }
            else {
                IUniswapV2Router01 router = IUniswapV2Router01(routerAddress);
                return router.addLiquidityETH{value : amount.sub(swapValue)}(token, tokenAmount, 0, 0, recipient, block.timestamp);
            }
    }

    function _swapNativeToEqualTokensAndProvide(address token0, address token1, uint amount, address routerAddress, address recipient) private returns (uint, uint, uint) {
            uint swapValue = amount.div(2);
            uint token0Amount = _swapNativeForToken(token0, swapValue, address(this), routerAddress);
            uint token1Amount = _swapNativeForToken(token1, amount.sub(swapValue), address(this), routerAddress);
            _approveTokenIfNeeded(token0, routerAddress);
            _approveTokenIfNeeded(token1, routerAddress);
            IUniswapV2Router01 router = IUniswapV2Router01(routerAddress);
            return router.addLiquidity(token0, token1, token0Amount, token1Amount, 0, 0, recipient, block.timestamp);
    }

    function _swapNativeForToken(address token, uint value, address recipient, address routerAddr) private returns (uint) {
        address[] memory path;
        IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);

        if (tokenBridgeForRouter[token][routerAddr] != address(0)) {
            path = new address[](3);
            path[0] = WNATIVE;
            path[1] = tokenBridgeForRouter[token][routerAddr];
            path[2] = token;
        } else {
            path = new address[](2);
            path[0] = WNATIVE;
            path[1] = token;
        }

        uint[] memory amounts = router.swapExactETHForTokens{value : value}(0, path, recipient, block.timestamp);
        return amounts[amounts.length - 1];
    }

    function _swapTokenForNative(address token, uint amount, address recipient, address routerAddr) private returns (uint) {
        address[] memory path;
        IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);

        if (tokenBridgeForRouter[token][routerAddr] != address(0)) {
            path = new address[](3);
            path[0] = token;
            path[1] = tokenBridgeForRouter[token][routerAddr];
            path[2] = router.WETH();
        } else {
            path = new address[](2);
            path[0] = token;
            path[1] = router.WETH();
        }

        // p3.7
        if (isFeeOnTransfer[token]) {
            router.swapExactTokensForETHSupportingFeeOnTransferTokens(amount, 0, path, address(this), block.timestamp);
            uint amountOut = IERC20(router.WETH()).balanceOf(address(this));
            IERC20(router.WETH()).safeTransfer(recipient, amountOut);
            return amountOut;
        } else {
            uint[] memory amounts = router.swapExactTokensForETH(amount, 0, path, recipient, block.timestamp);
            return amounts[amounts.length - 1];
        }
    }

    function _swap(address _from, uint amount, address _to, address recipient, address routerAddr) private returns (uint) {
        IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);

        address fromBridge = tokenBridgeForRouter[_from][routerAddr];
        address toBridge = tokenBridgeForRouter[_to][routerAddr];

        address[] memory path;

        if (fromBridge != address(0) && toBridge != address(0)) { // both have bridge
            if (fromBridge != toBridge) {
                path = new address[](5);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = WNATIVE;
                path[3] = toBridge;
                path[4] = _to;
            } else {
                path = new address[](3);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = _to;
            }
        } else if (fromBridge != address(0)) { // from has bridge
            if (fromBridge == _to) {
                path = new address[](2);
                path[0] = _from;
                path[1] = _to;
            }
            else if (_to == WNATIVE) {
                path = new address[](3);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = WNATIVE;
            } else {
                path = new address[](4);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = WNATIVE;
                path[3] = _to;
            }
        } else if (toBridge != address(0)) { // only _to ha a bridge, not _from
            if (_from == toBridge) {
                path = new address[](2);
                path[0] = _from;
                path[1] = _to;
            } else if (_from == WNATIVE) {
                path = new address[](3);
                path[0] = WNATIVE;
                path[1] = toBridge;
                path[2] = _to;
            }
            else {
                path = new address[](4);
                path[0] = _from;
                path[1] = WNATIVE;
                path[2] = toBridge;
                path[3] = _to;
            }
        } else if (_from == WNATIVE || _to == WNATIVE) {
            path = new address[](2);
            path[0] = _from;
            path[1] = _to;
        } else {
            // Go through WNative
            path = new address[](3);
            path[0] = _from;
            path[1] = WNATIVE;
            path[2] = _to;
        }

        uint[] memory amounts;

        // p3.5
        if (isFeeOnTransfer[_from]) {
            router.swapExactTokensForTokensSupportingFeeOnTransferTokens(amount, 0, path, address(this), block.timestamp);
            uint amountOut = IERC20(_to).balanceOf(address(this));
            IERC20(_to).safeTransfer(recipient, amountOut);
            return amountOut;
        } else {
            amounts = router.swapExactTokensForTokens(amount, 0, path, recipient, block.timestamp);
        }

        return amounts[amounts.length - 1];
    }

    function _estimateSwap(address _from, uint amount, address _to, address routerAddr) private view returns (uint) {
        IUniswapV2Router01 router = IUniswapV2Router01(routerAddr);

        address fromBridge = tokenBridgeForRouter[_from][routerAddr];
        address toBridge = tokenBridgeForRouter[_to][routerAddr];

        address[] memory path;

        if (fromBridge != address(0) && toBridge != address(0)) {
            if (fromBridge != toBridge) {
                path = new address[](5);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = WNATIVE;
                path[3] = toBridge;
                path[4] = _to;
            } else {
                path = new address[](3);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = _to;
            }
        } else if (fromBridge != address(0)) {
            if (fromBridge == _to) {
                path = new address[](2);
                path[0] = _from;
                path[1] = _to;
            }
            else if (_to == WNATIVE) {
                path = new address[](3);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = WNATIVE;
            } else {
                path = new address[](4);
                path[0] = _from;
                path[1] = fromBridge;
                path[2] = WNATIVE;
                path[3] = _to;
            }
        } else if (toBridge != address(0)) {
            if (_from == toBridge) {
                path = new address[](2);
                path[0] = _from;
                path[1] = _to;
            } else if (_from == WNATIVE) {
                path = new address[](3);
                path[0] = WNATIVE;
                path[1] = toBridge;
                path[2] = _to;
            }
            else {
                path = new address[](4);
                path[0] = _from;
                path[1] = WNATIVE;
                path[2] = toBridge;
                path[3] = _to;
            }
        } else if (_from == WNATIVE || _to == WNATIVE) {
            path = new address[](2);
            path[0] = _from;
            path[1] = _to;
        } else {
            // Go through WNative
            path = new address[](3);
            path[0] = _from;
            path[1] = WNATIVE;
            path[2] = _to;
        }

        uint[] memory amounts = router.getAmountsOut(amount, path);
        return amounts[amounts.length - 1];
    }


    /* ========== RESTRICTED FUNCTIONS ========== */

    function setTokenBridgeForRouter(address token, address router, address bridgeToken) external onlyOwner {
       tokenBridgeForRouter[token][router] = bridgeToken;
    }

    function withdraw(address token) external onlyOwner {
        if (token == address(0)) {
            payable(owner()).safeTransfer(address(this), balance);
            return;
        }

        IERC20(token).safeTransfer(owner(), IERC20(token).balanceOf(address(this)));
    }

    function setUseNativeRouter(address router) external onlyOwner {
        useNativeRouter[router] = true;
    }

    function setIsFeeOnTransfer(address token) external onlyOwner {
        isFeeOnTransfer[token] = true;
    }
}