// File: contracts\interface\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: contracts\interface\Ownable.sol

pragma solidity ^0.8.0;


abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "ERC20Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "ERC20Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: contracts\interface\IUniswapAMM.sol

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;
}

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);
}

pragma solidity >=0.6.2;

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;
}

// File: contracts\library\Address.sol

pragma solidity ^0.8.0;

/**
 * @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);
            }
        }
    }
}

// File: contracts\library\SafeMath.sol

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
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) {
        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) {
        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) {
        // 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) {
        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) {
        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) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @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) {
        require(b <= a, "SafeMath: subtraction overflow");
        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) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @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. 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) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        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) {
        require(b > 0, "SafeMath: modulo by zero");
        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) {
        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.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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) {
        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) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

// File: contracts\interface\IERC20.sol

pragma solidity ^0.8.0;

/**
 * @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);
}

// File: contracts\library\SafeERC20.sol

pragma solidity ^0.8.0;




/**
 * @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 SafeMath for uint256;
    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).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _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: contracts\interface\IAntiBotBlacklist.sol

pragma solidity ^0.8.0;

interface IAntiBotBlacklist {
    function blacklistCheck(address suspect) external view returns (bool);

    function blacklistCheckExpirationTime(address suspect)
        external
        view
        returns (uint256);

    function addSuspect(address suspect, uint256 _expirationTime) external;

    function removeSuspect(address suspect) external;

    function addSuspectBatch(
        address[] memory _addresses,
        uint256 _expirationTime
    ) external;

    function removeSuspectBatch(address[] memory _addresses) external;

    event AddSuspect(address indexed suspect);
    event RemoveSuspect(address indexed suspect);
}

// File: contracts\util\AntiBotBlacklist.sol

pragma solidity ^0.8.0;




abstract contract AntiBotBlacklist is Ownable, IAntiBotBlacklist {
    using SafeMath for uint256;

    uint256 public blacklistLength;

    /**
     * @dev mapping store blacklist. address=>ExpirationTime
     */
    mapping(address => uint256) blacklist;

    modifier antiBot(address _user) {
        require(blacklistCheck(_user), "user is in decentralized blacklist");
        _;
    }
    modifier antiBots(address _user0, address _user1) {
        require(blacklistCheck(_user0), "user0 is in decentralized blacklist");
        require(blacklistCheck(_user1), "user1 is in decentralized blacklist");
        _;
    }

    /**
     * @dev check if the address is in the blacklist or not or expired
     */
    function blacklistCheck(address suspect)
        public
        view
        override
        returns (bool)
    {
        return blacklist[suspect] < block.timestamp;
    }

    /**
     * @dev check if the address is in the blacklist or not
     */
    function blacklistCheckExpirationTime(address suspect)
        external
        view
        override
        returns (uint256)
    {
        return blacklist[suspect];
    }

    /**
     * @dev Add an address to the blacklist. Only the owner can add. Owner is the address of the Governance contract.
     */
    function addSuspect(address _suspect, uint256 _expirationTime)
        external
        override
        onlyOwner
    {
        _addSuspectToBlackList(_suspect, _expirationTime);
    }

    /**
     * @dev Remove an address from the blacklist. Only the owner can remove. Owner is the address of the Governance contract.
     */
    function removeSuspect(address suspect) external override onlyOwner {
        _removeSuspectToBlackList(suspect);
    }

    /**
     * @dev Add multi address to the blacklist. Only the owner can add. Owner is the address of the Governance contract.
     */
    function addSuspectBatch(
        address[] memory _addresses,
        uint256 _expirationTime
    ) external override onlyOwner {
        require(_addresses.length > 0, "addresses is empty");
        for (uint256 i = 0; i < _addresses.length; i++) {
            _addSuspectToBlackList(_addresses[i], _expirationTime);
        }
    }

    /**
     * @dev Remove multi address from the blacklist. Only the owner can remove. Owner is the address of the Governance contract.
     */
    function removeSuspectBatch(address[] memory _addresses)
        external
        override
        onlyOwner
    {
        require(_addresses.length > 0, "addresses is empty");
        for (uint256 i = 0; i < _addresses.length; i++) {
            _removeSuspectToBlackList(_addresses[i]);
        }
    }

    /**
     * @dev internal function to add address to blacklist.
     */
    function _addSuspectToBlackList(address _suspect, uint256 _expirationTime)
        internal
    {
        require(_suspect != owner(), "the suspect cannot be owner");
        require(blacklist[_suspect] == 0, "the suspect already exist");
        blacklist[_suspect] = _expirationTime;
        blacklistLength = blacklistLength.add(1);
        emit AddSuspect(_suspect);
    }

    /**
     * @dev internal function to remove address from blacklist.
     */
    function _removeSuspectToBlackList(address _suspect) internal {
        require(blacklist[_suspect] > 0, "suspect is not in blacklist");
        delete blacklist[_suspect];
        blacklistLength = blacklistLength.sub(1);
        emit RemoveSuspect(_suspect);
    }
}

// File: contracts\BTFAToken.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;







/**
 * @title TokenGeneratorMetadata
 * @author Create My Token (https://t.me/LemonCryptoDev)
 * @dev Implementation of the TokenGeneratorMetadata
 */
contract TokenGeneratorMetadata {
    string public constant _GENERATOR = "https://t.me/LemonCryptoDev";
    string public constant _VERSION = "v1.0.0";

    function generator() public pure returns (string memory) {
        return _GENERATOR;
    }

    function version() public pure returns (string memory) {
        return _VERSION;
    }
}

pragma solidity ^0.8.0;

/**
 * @title BTFA_Token
 * @author Create My Token (https://t.me/LemonCryptoDev)
 * @dev Implementation of the BTFA_Token
 */
contract BTFA_Token is IERC20, AntiBotBlacklist, TokenGeneratorMetadata {
    using SafeMath for uint256;
    using Address for address;
    using SafeERC20 for IERC20;

    address dead = 0x000000000000000000000000000000000000dEaD;
    address zero = address(0);

    uint8 public constant _maxLiqFee = 10;
    uint8 public constant _maxTaxFee = 10;
    uint8 public constant _maxWalletFee = 10;
    uint256 public constant _minMxTxAmount = 1000 * 10**9;
    uint256 public constant _minMxSnipeAmount = 1000 * 10**9;
    uint256 public constant _minMxWalletAmount = 1000 * 10**9;

    mapping(address => uint256) private _rOwned;
    mapping(address => uint256) private _tOwned;
    mapping(address => mapping(address => uint256)) private _allowances;

    mapping(address => bool) private _isExcludedFromFee;
    mapping(address => bool) private _isExcludedFromAntiSnipe;

    mapping(address => bool) private _isExcluded;
    address[] private _excluded;

    uint256 private constant MAX = ~uint256(0);
    uint256 public _tTotal;
    uint256 private _rTotal;
    uint256 private _tFeeTotal;

    string public _name = "Banana Task Force Ape";
    string public _symbol = "BTFA";
    uint8 private _decimals = 9;

    uint8 public _buyTaxFee = 0; // Fee for Reflection in Buying
    uint8 public _sellTaxFee = 0; // Fee for Reflection in Selling
    uint8 public _taxFee = 0; // Fee for Reflection
    uint8 private _previousTaxFee = _taxFee;

    uint8 public _buyLiquidityFee = 0; // Fee for Liquidity in Buying
    uint8 public _sellLiquidityFee = 0; // Fee for Liquidity in Selling
    uint8 public _liquidityFee = 0; // Fee for Liquidity
    uint8 private _previousLiquidityFee = _liquidityFee;

    uint8 public _buyWalletFee = 0; // Fee to marketing/charity wallet in Buying
    uint8 public _sellWalletFee = 0; // Fee to marketing/charity wallet in Selling
    uint8 public _walletFee = 0; // Fee to marketing/charity wallet
    uint8 private _previousWalletFee = _walletFee;

    IUniswapV2Router02 public immutable _uniV2Router;
    address public immutable _uniV2Pair;
    address payable public _marketingWallet;

    bool _inSwapAndLiquify;
    bool public _swapAndLiquifyEnabled = true;

    uint256 public _maxTxAmount;
    uint256 public _maxWalletAmount;
    uint256 public _maxSnipeAmount;
    uint256 public _numTokensSellToAddToLiquidity;

    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    modifier lockTheSwap() {
        _inSwapAndLiquify = true;
        _;
        _inSwapAndLiquify = false;
    }

    modifier antiSnipe(
        address from,
        address to,
        uint256 amount
    ) {
        if (!_isExcludedFromAntiSnipe[from] && to == _uniV2Pair) {
            require(
                amount <= _maxSnipeAmount,
                "Exceeds the limited sell amount"
            );
        }
        _;
    }

    constructor(
        uint256 maxSupply,
        address routerAddress,
        address marketingWallet,
        uint8 buyReflectionFee,
        uint8 buyWalletFee,
        uint8 buyLiquidityFee,
        uint8 sellReflectionFee,
        uint8 sellWalletFee,
        uint8 sellLiquidityFee
    ) payable {
        _tTotal = maxSupply;
        _rTotal = (MAX - (MAX % _tTotal));

        _rOwned[_msgSender()] = _rTotal;

        require(marketingWallet != address(0), "INVALID MARKETING WALLET");
        _marketingWallet = payable(marketingWallet);

        _maxTxAmount = _tTotal.mul(1).div(10**6);
        _maxSnipeAmount = _tTotal.mul(1).div(10**6);
        _maxWalletAmount = _tTotal.mul(1).div(10**4);

        _numTokensSellToAddToLiquidity = maxSupply.mul(1).div(10000);

        IUniswapV2Router02 uniV2Router = IUniswapV2Router02(routerAddress);
        // Create a uniswap pair for this new token
        _uniV2Pair = IUniswapV2Factory(uniV2Router.factory()).createPair(
            address(this),
            uniV2Router.WETH()
        );

        // set the rest of the contract variables
        _uniV2Router = uniV2Router;

        _isExcludedFromFee[_msgSender()] = true;
        _isExcludedFromFee[dead] = true;
        _isExcludedFromFee[zero] = true;
        _isExcludedFromFee[address(this)] = true;

        _isExcludedFromAntiSnipe[_msgSender()] = true;
        _isExcludedFromAntiSnipe[address(this)] = true;

        require(buyReflectionFee <= _maxTaxFee, "Buy TF Error");
        require(buyLiquidityFee <= _maxLiqFee, "Buy LF Error");
        require(buyWalletFee <= _maxWalletFee, "Buy WF Error");
        _buyTaxFee = buyReflectionFee;
        _buyLiquidityFee = buyLiquidityFee;
        _buyWalletFee = buyWalletFee;

        require(sellReflectionFee <= _maxTaxFee, "Buy TF Error");
        require(sellLiquidityFee <= _maxLiqFee, "Buy LF Error");
        require(sellWalletFee <= _maxWalletFee, "Buy WF Error");
        _sellTaxFee = sellReflectionFee;
        _sellLiquidityFee = sellLiquidityFee;
        _sellWalletFee = sellWalletFee;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function transfer(address recipient, uint256 amount)
        public
        override
        returns (bool)
    {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender)
        public
        view
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount)
        public
        override
        returns (bool)
    {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }

    function totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }

    function deliver(uint256 tAmount) public {
        address sender = _msgSender();
        require(
            !_isExcluded[sender],
            "Excluded addresses cannot call this function"
        );
        (uint256 rAmount, , , , , ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rTotal = _rTotal.sub(rAmount);
        _tFeeTotal = _tFeeTotal.add(tAmount);
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee)
        public
        view
        returns (uint256)
    {
        require(tAmount <= _tTotal, "Amt must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount, , , , , ) = _getValues(tAmount);
            return rAmount;
        } else {
            (, uint256 rTransferAmount, , , , ) = _getValues(tAmount);
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount)
        public
        view
        returns (uint256)
    {
        require(rAmount <= _rTotal, "Amt must be less than tot refl");
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner {
        require(
            !_isExcluded[account],
            "Account is already excluded from reward"
        );
        if (_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function includeInReward(address account) external onlyOwner {
        require(_isExcluded[account], "Already excluded");
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    function excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }

    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }

    function excludeFromAntiSnipe(address account) public onlyOwner {
        _isExcludedFromAntiSnipe[account] = true;
    }

    function includeInAntiSnipe(address account) public onlyOwner {
        _isExcludedFromAntiSnipe[account] = false;
    }

    function isExcludedFromAntiSnipe(address account)
        public
        view
        returns (bool)
    {
        return _isExcludedFromAntiSnipe[account];
    }

    function setAllBuyFeePercent(
        uint8 taxFee,
        uint8 liquidityFee,
        uint8 walletFee
    ) external onlyOwner {
        require(taxFee >= 0 && taxFee <= _maxTaxFee, "TF error");
        require(liquidityFee >= 0 && liquidityFee <= _maxLiqFee, "LF error");
        require(walletFee >= 0 && walletFee <= _maxWalletFee, "WF error");

        _buyTaxFee = taxFee;
        _buyLiquidityFee = liquidityFee;
        _buyWalletFee = walletFee;
    }

    function setAllSellFeePercent(
        uint8 taxFee,
        uint8 liquidityFee,
        uint8 walletFee
    ) external onlyOwner {
        require(taxFee >= 0 && taxFee <= _maxTaxFee, "TF error");
        require(liquidityFee >= 0 && liquidityFee <= _maxLiqFee, "LF error");
        require(walletFee >= 0 && walletFee <= _maxWalletFee, "WF error");

        _sellTaxFee = taxFee;
        _sellLiquidityFee = liquidityFee;
        _sellWalletFee = walletFee;
    }

    function setMaxTxAmount(uint256 maxTxAmount) external onlyOwner {
        require(maxTxAmount >= _minMxTxAmount, "The value is too small");
        _maxTxAmount = maxTxAmount;
    }

    function setMaxSnipeAmount(uint256 maxSnipeAmount) external onlyOwner {
        require(maxSnipeAmount >= _minMxSnipeAmount, "The value is too small");
        _maxSnipeAmount = maxSnipeAmount;
    }

    function setMaxWalletAmount(uint256 maxWalletAmount) external onlyOwner {
        require(
            maxWalletAmount >= _minMxWalletAmount,
            "The value is too small"
        );
        _maxWalletAmount = maxWalletAmount;
    }

    function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        _swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }

    function setNumTokensSellToAddToLiquidity(uint256 amount) public onlyOwner {
        require(amount > 0, "The amount should be greater than zero");
        require(amount < totalSupply(), "The amount should be less than total supply");
        _numTokensSellToAddToLiquidity = amount;
    }

    function setMarketingWallet(address payable newMarketingWallet)
        external
        onlyOwner
    {
        require(newMarketingWallet != address(0), "ZERO ADDRESS");
        _marketingWallet = newMarketingWallet;
    }

    //to recieve ETH from uniV2Router when swaping
    receive() external payable {}

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function _getValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        (
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(
            tAmount,
            tFee,
            tLiquidity,
            _getRate()
        );
        return (
            rAmount,
            rTransferAmount,
            rFee,
            tTransferAmount,
            tFee,
            tLiquidity
        );
    }

    function _getTValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tLiquidity = calculateLiquidityFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
        return (tTransferAmount, tFee, tLiquidity);
    }

    function _getRValues(
        uint256 tAmount,
        uint256 tFee,
        uint256 tLiquidity,
        uint256 currentRate
    )
        private
        pure
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
        return (rAmount, rTransferAmount, rFee);
    }

    function _getRate() private view returns (uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns (uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (
                _rOwned[_excluded[i]] > rSupply ||
                _tOwned[_excluded[i]] > tSupply
            ) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function _takeLiquidity(uint256 tLiquidity) private {
        uint256 currentRate = _getRate();
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
        if (_isExcluded[address(this)])
            _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
    }

    function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_taxFee).div(10**2);
    }

    function calculateLiquidityFee(uint256 _amount)
        private
        view
        returns (uint256)
    {
        return _amount.mul(_liquidityFee + _walletFee).div(10**2);
    }

    function removeAllFee() private {
        if (_taxFee == 0 && _liquidityFee == 0 && _walletFee == 0) return;

        _previousTaxFee = _taxFee;
        _previousLiquidityFee = _liquidityFee;
        _previousWalletFee = _walletFee;

        _taxFee = 0;
        _liquidityFee = 0;
        _walletFee = 0;
    }

    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _liquidityFee = _previousLiquidityFee;
        _walletFee = _previousWalletFee;
    }

    function isExcludedFromFee(address account) public view returns (bool) {
        return _isExcludedFromFee[account];
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) private {
        require(owner != address(0), "ERC20: approve from zero address");
        require(spender != address(0), "ERC20: approve to zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) private antiBots(from, to) antiSnipe(from, to, amount) {
        require(from != address(0), "ERC20: transfer from zero address");
        require(to != address(0), "ERC20: transfer to zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        if (from != owner() && to != owner())
            require(
                amount <= _maxTxAmount,
                "Transfer amount exceeds the maxTxAmount."
            );

        if (
            from != owner() &&
            to != owner() &&
            to != address(0) &&
            to != dead &&
            to != _uniV2Pair
        ) {
            uint256 contractBalanceRecepient = balanceOf(to);
            require(
                contractBalanceRecepient + amount <= _maxWalletAmount,
                "Exceeds maximum wallet amount"
            );
        }

        // is the token balance of this contract address over the min number of
        // tokens that we need to initiate a swap + liquidity lock?
        // also, don't get caught in a circular liquidity event.
        // also, don't swap & liquify if sender is uniswap pair.
        uint256 contractTokenBalance = balanceOf(address(this));

        if (contractTokenBalance >= _maxTxAmount) {
            contractTokenBalance = _maxTxAmount;
        }

        if (!_inSwapAndLiquify && to == _uniV2Pair && _swapAndLiquifyEnabled) {
            if (contractTokenBalance >= _numTokensSellToAddToLiquidity) {
                contractTokenBalance = _numTokensSellToAddToLiquidity;
                //add liquidity
                swapAndLiquify(contractTokenBalance);
            }
        }

        //indicates if fee should be deducted from transfer
        bool takeFee = true;

        //if any account belongs to _isExcludedFromFee account then remove the fee
        if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
            takeFee = false;
        }

        if (takeFee) {
            if (from == _uniV2Pair) {
                _taxFee = _buyTaxFee;
                _liquidityFee = _buyLiquidityFee;
                _walletFee = _buyWalletFee;
            } else if (to == _uniV2Pair) {
                _taxFee = _sellTaxFee;
                _liquidityFee = _sellLiquidityFee;
                _walletFee = _sellWalletFee;
            } else {
                takeFee = false;
            }
        }

        //transfer amount, it will take tax, burn, liquidity fee
        _tokenTransfer(from, to, amount, takeFee);
    }

    function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
        //This needs to be distributed among burn, wallet and liquidity
        //burn
        uint8 totFee = _walletFee + _liquidityFee;
        uint256 spentAmount = 0;

        if (_walletFee != 0) {
            spentAmount = contractTokenBalance.div(totFee).mul(_walletFee);
            _tokenTransferNoFee(address(this), _marketingWallet, spentAmount);
        }

        if (_liquidityFee != 0) {
            contractTokenBalance = contractTokenBalance.sub(spentAmount);

            // split the contract balance into halves
            uint256 half = contractTokenBalance.div(2);
            uint256 otherHalf = contractTokenBalance.sub(half);

            // capture the contract's current ETH balance.
            // this is so that we can capture exactly the amount of ETH that the
            // swap creates, and not make the liquidity event include any ETH that
            // has been manually sent to the contract
            uint256 initialBalance = address(this).balance;

            // swap tokens for ETH
            swapTokensForETH(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered

            // how much ETH did we just swap into?
            uint256 newBalance = address(this).balance.sub(initialBalance);

            // add liquidity to uniswap
            addLiquidity(otherHalf, newBalance);

            emit SwapAndLiquify(half, newBalance, otherHalf);
        }
    }

    function buyBackTokens(uint256 amount) private lockTheSwap {
        if (amount > 0) {
            swapETHForTokens(amount);
        }
    }

    function swapTokensForETH(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = _uniV2Router.WETH();

        _approve(address(this), address(_uniV2Router), tokenAmount);

        // make the swap
        _uniV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp.add(300)
        );
    }

    function swapETHForTokens(uint256 amount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = _uniV2Router.WETH();
        path[1] = address(this);

        // make the swap
        _uniV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{
            value: amount
        }(
            0, // accept any amount of Tokens
            path,
            dead, // Burn address
            block.timestamp.add(300)
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(_uniV2Router), tokenAmount);

        // add the liquidity
        _uniV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            dead,
            block.timestamp.add(300)
        );
    }

    //this method is responsible for taking all fee, if takeFee is true
    function _tokenTransfer(
        address sender,
        address recipient,
        uint256 amount,
        bool takeFee
    ) private {
        if (!takeFee) removeAllFee();

        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, amount);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount);
        } else {
            _transferStandard(sender, recipient, amount);
        }

        if (!takeFee) restoreAllFee();
    }

    function _transferStandard(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferToExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferFromExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferBothExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _tokenTransferNoFee(
        address sender,
        address recipient,
        uint256 amount
    ) private {
        _rOwned[sender] = _rOwned[sender].sub(amount);
        _rOwned[recipient] = _rOwned[recipient].add(amount);

        if (_isExcluded[sender]) {
            _tOwned[sender] = _tOwned[sender].sub(amount);
        }
        if (_isExcluded[recipient]) {
            _tOwned[recipient] = _tOwned[recipient].add(amount);
        }
        emit Transfer(sender, recipient, amount);
    }

    function recoverToken(address tokenAddress, uint256 tokenAmount)
        public
        onlyOwner
    {
        // do not allow recovering self token
        require(tokenAddress != address(this), "Self withdraw");
        IERC20(tokenAddress).transfer(owner(), tokenAmount);
    }
}