// SPDX-License-Identifier: MIT

pragma solidity =0.8.17;

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions 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 {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

// 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 generally not needed starting with Solidity 0.8, since 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 subtraction 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. 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;
        }
    }
}

// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

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;
}

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);
}

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;
}

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;
}

contract Torty is Context, ERC20, Ownable {
    using SafeMath for uint256;

    IUniswapV2Router02 private _uniswapV2Router;
    
    IERC20 private WrappedETH;

    mapping (address => uint) private _cooldown;
    mapping (address => uint) private _vestingCooldown;

    mapping (address => bool) private _isExcludedFromFees;
    mapping (address => bool) private _isExcludedMaxTransactionAmount;
    mapping (address => bool) private _isBlacklisted;

    bool public tradingOpen;
    bool private _swapping;
    bool public swapEnabled = false;
    bool public cooldownEnabled = false;
    bool public vestingCooldownEnabled = false;
    bool public feesEnabled = true;
    bool public transferFeesEnabled = true;
    bool public piPenaltyEnabled = true;

    uint256 private constant _tSupply = 1_000_000_000 ether;

    uint256 public maxBuyAmount = _tSupply;
    uint256 public maxSellAmount = _tSupply;
    uint256 public maxWalletAmount = _tSupply;

    uint256 public maxSellPercentage = 25;

    uint256 public tradingOpenBlock = 0;
    uint256 private _blocksToBlacklist = 0;
    uint256 private _cooldownBlocks = 1;
    uint256 private _vestingCooldownBlocks = 2390;

    uint256 public constant FEE_DIVISOR = 1000;
    uint256 public constant PENALTY_DIVISOR = 10;

    uint256 private _totalFees;
    uint256 private _mktgFee;
    uint256 private _devFee;
    uint256 private _buybackFee;

    uint256 public buyMktgFee = 20;
    uint256 private _previousBuyMktgFee = buyMktgFee;
    uint256 public buyDevFee = 20;
    uint256 private _previousBuyDevFee = buyDevFee;
    uint256 public buyBuybackFee = 10;
    uint256 private _previousBuyBuybackFee = buyBuybackFee;

    uint256 public sellMktgFee = 50;
    uint256 private _previousSellMktgFee = sellMktgFee;
    uint256 public sellDevFee = 50;
    uint256 private _previousSellDevFee = sellDevFee;
    uint256 public sellBuybackFee = 50;
    uint256 private _previousSellBuybackFee = sellBuybackFee;

    uint256 public transferMktgFee = 333;
    uint256 private _previousTransferMktgFee = transferMktgFee;
    uint256 public transferDevFee = 333;
    uint256 private _previousTransferDevFee = transferDevFee;
    uint256 public transferBuybackFee = 333;
    uint256 private _previousTransferBuybackFee = transferBuybackFee;

    uint256 public piPenaltyMultiplier24 = 15;
    uint256 public piPenaltyMultiplier46 = 20;
    uint256 public piPenaltyMultiplier68 = 25;
    uint256 public piPenaltyMultiplier810 = 30;
    uint256 public piPenaltyMultiplier10more = 35;

    uint256 private _tokensForMktg;
    uint256 private _tokensForDev;
    uint256 private _tokensForBuyback;
    uint256 private _swapTokensAtAmount = 0;

    address payable private _mktgWallet;
    address payable private _devWallet;
    address payable private _buybackWallet;

    address private _uniswapV2Pair;
    address constant private DEAD = 0x000000000000000000000000000000000000dEaD;
    address constant private ZERO = 0x0000000000000000000000000000000000000000;

    enum TransactionType {
        BUY,
        SELL,
        TRANSFER
    }

    event OpenTrading(uint256 tradingOpenBlock, uint256 _blocksToBlacklist);
    event SetMaxBuyAmount(uint256 newMaxBuyAmount);
    event SetMaxSellAmount(uint256 newMaxSellAmount);
    event SetMaxWalletAmount(uint256 newMaxWalletAmount);
    event SetMaxSellPercentage(uint256 newMaxSellPercentage);
    event SetSwapTokensAtAmount(uint256 newSwapTokensAtAmount);
    event SetBuyFee(uint256 buyMktgFee, uint256 buyDevFee, uint256 buyBuybackFee);
	event SetSellFee(uint256 sellMktgFee, uint256 sellDevFee, uint256 sellBuybackFee);
    event SetTransferFee(uint256 transferMktgFee, uint256 transferDevFee, uint256 transferBuybackFee);
    event SetPenaltyMultiplier(uint256 piPenaltyMultiplier24, uint256 piPenaltyMultiplier46, uint256 piPenaltyMultiplier68, uint256 piPenaltyMultiplier810, uint256 piPenaltyMultiplier10more);
    
    constructor () ERC20("Torty", "TORTY") {
        _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(_uniswapV2Router), _tSupply);
        _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        IERC20(_uniswapV2Pair).approve(address(_uniswapV2Router), type(uint).max);

        WrappedETH = IERC20(_uniswapV2Router.WETH());

        _mktgWallet = payable(owner());
        _devWallet = payable(owner());
        _buybackWallet = payable(owner());

        _isExcludedFromFees[owner()] = true;
        _isExcludedFromFees[address(this)] = true;
        _isExcludedFromFees[DEAD] = true;

        _isExcludedMaxTransactionAmount[owner()] = true;
        _isExcludedMaxTransactionAmount[address(this)] = true;
        _isExcludedMaxTransactionAmount[DEAD] = true;

        _mint(owner(), _tSupply);
    }

    function _transfer(address from, address to, uint256 amount) internal override {
        require(from != ZERO, "ERC20: transfer from the zero address");
        require(to != ZERO, "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        bool takeFee = true;
        TransactionType txType = (from == _uniswapV2Pair) ? TransactionType.BUY : (to == _uniswapV2Pair) ? TransactionType.SELL : TransactionType.TRANSFER;
        if (from != owner() && to != owner() && to != ZERO && to != DEAD && !_swapping) {
            require(!_isBlacklisted[from] && !_isBlacklisted[to], "Blacklisted.");

            if(!tradingOpen) require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not allowed yet.");

            if (cooldownEnabled) {
                if (to != address(_uniswapV2Router) && to != address(_uniswapV2Pair)) {
                    require(_cooldown[tx.origin] < block.number - _cooldownBlocks && _cooldown[to] < block.number - _cooldownBlocks, "Transfer delay enabled. Try again later.");
                    _cooldown[tx.origin] = block.number;
                    _cooldown[to] = block.number;
                }
            }

            if (txType == TransactionType.BUY && to != address(_uniswapV2Router) && !_isExcludedMaxTransactionAmount[to]) {
                require(amount <= maxBuyAmount, "Transfer amount exceeds the maxBuyAmount.");
                require(balanceOf(to) + amount <= maxWalletAmount, "Exceeds maximum wallet token amount.");
            }
            
            if (txType == TransactionType.SELL && from != address(_uniswapV2Router) && !_isExcludedMaxTransactionAmount[from]) {
                require(amount <= maxSellAmount, "Transfer amount exceeds the maxSellAmount.");
                require(amount <= balanceOf(from).mul(maxSellPercentage).div(100), "Transfer amount exceeds the maxSellPercentage.");

                if (vestingCooldownEnabled) {
                    if (from != address(_uniswapV2Router) && from != address(_uniswapV2Pair)) {
                        require(_vestingCooldown[tx.origin] < block.number - _vestingCooldownBlocks && _vestingCooldown[from] < block.number - _vestingCooldownBlocks, "You're vested. Try again later.");
                        _vestingCooldown[tx.origin] = block.number;
                        _vestingCooldown[from] = block.number;
                    }
                }

            }
        }

        if(_isExcludedFromFees[from] || _isExcludedFromFees[to] || !feesEnabled || (!transferFeesEnabled && txType == TransactionType.TRANSFER)) takeFee = false;

        uint256 contractBalance = balanceOf(address(this));
        bool canSwap = (contractBalance > _swapTokensAtAmount) && (txType == TransactionType.SELL);

        if (canSwap && swapEnabled && !_swapping && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
            _swapping = true;
            _swapBack(contractBalance);
            _swapping = false;
        }

        _tokenTransfer(from, to, amount, takeFee, txType);
    }

    function _swapBack(uint256 contractBalance) internal {
        uint256 totalTokensToSwap =  _tokensForMktg.add(_tokensForDev).add(_tokensForBuyback);
        bool success;
        
        if (contractBalance == 0 || totalTokensToSwap == 0) return;

        if (contractBalance > _swapTokensAtAmount.mul(5)) contractBalance = _swapTokensAtAmount.mul(5);

        _swapTokensForETH(contractBalance);
        
        uint256 ethBalance = address(this).balance;
        uint256 ethForDev = ethBalance.mul(_tokensForDev).div(totalTokensToSwap);
        uint256 ethForBuyback = ethBalance.mul(_tokensForBuyback).div(totalTokensToSwap);
        
        _tokensForMktg = 0;
        _tokensForDev = 0;
        _tokensForBuyback = 0;

        (success,) = address(_devWallet).call{value: ethForDev}("");
        (success,) = address(_buybackWallet).call{value: ethForBuyback}("");
        (success,) = address(_mktgWallet).call{value: address(this).balance}("");
    }

    function _swapTokensForETH(uint256 tokenAmount) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = _uniswapV2Router.WETH();
        _approve(address(this), address(_uniswapV2Router), tokenAmount);
        _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }
        
    function _sendETHToFee(uint256 amount) internal {
        _mktgWallet.transfer(amount.div(2));
        _devWallet.transfer(amount.div(2));
    }

    function isBlacklisted(address wallet) external view returns (bool) {
        return _isBlacklisted[wallet];
    }

    function openTrading(uint256 blocks) public onlyOwner {
        require(!tradingOpen, "Trading is already open");
        require(blocks <= 10, "Invalid blocks count.");
        maxBuyAmount = _tSupply.mul(2).div(1000);
        maxSellAmount = _tSupply.mul(1).div(1000);
        maxWalletAmount = _tSupply.mul(6).div(1000);
        maxSellPercentage = 25;
        _swapTokensAtAmount = _tSupply.mul(1).div(10000);
        swapEnabled = true;
        cooldownEnabled = true;
        vestingCooldownEnabled = true;
        tradingOpen = true;
        tradingOpenBlock = block.number;
        _blocksToBlacklist = blocks;
        emit OpenTrading(tradingOpenBlock, _blocksToBlacklist);
    }

    function setCooldownEnabled(bool onoff) public onlyOwner {
        cooldownEnabled = onoff;
    }

    function setVestingCooldownEnabled(bool onoff) public onlyOwner {
        vestingCooldownEnabled = onoff;
    }

    function setSwapEnabled(bool onoff) public onlyOwner {
        swapEnabled = onoff;
    }

    function setFeesEnabled(bool onoff) public onlyOwner {
        feesEnabled = onoff;
    }

    function setTransferFeesEnabled(bool onoff) public onlyOwner {
        transferFeesEnabled = onoff;
    }

    function setPIPenaltyEnabled(bool onoff) public onlyOwner {
        piPenaltyEnabled = onoff;
    }

    function setMaxBuyAmount(uint256 _maxBuyAmount) public onlyOwner {
        require(_maxBuyAmount >= (totalSupply().mul(1).div(1000)), "Max buy amount cannot be lower than 0.1% total supply.");
        maxBuyAmount = _maxBuyAmount;
        emit SetMaxBuyAmount(maxBuyAmount);
    }

    function setMaxSellAmount(uint256 _maxSellAmount) public onlyOwner {
        require(_maxSellAmount >= (totalSupply().mul(1).div(1000)), "Max sell amount cannot be lower than 0.1% total supply.");
        maxSellAmount = _maxSellAmount;
        emit SetMaxSellAmount(maxSellAmount);
    }
    
    function setMaxWalletAmount(uint256 _maxWalletAmount) public onlyOwner {
        require(_maxWalletAmount >= (totalSupply().mul(1).div(1000)), "Max wallet amount cannot be lower than 0.1% total supply.");
        maxWalletAmount = _maxWalletAmount;
        emit SetMaxWalletAmount(maxWalletAmount);
    }

    function setMaxSellPercentage(uint256 _maxSellPercentage) public onlyOwner {
        require(_maxSellPercentage >= 1, "Max sell percentage cannot be lower than 1%.");
        maxSellPercentage = _maxSellPercentage;
        emit SetMaxSellPercentage(maxSellPercentage);
    }
    
    function setSwapTokensAtAmount(uint256 swapTokensAtAmount) public onlyOwner {
        require(swapTokensAtAmount >= (totalSupply().mul(1).div(100000)), "Swap amount cannot be lower than 0.001% total supply.");
        require(swapTokensAtAmount <= (totalSupply().mul(5).div(1000)), "Swap amount cannot be higher than 0.5% total supply.");
        _swapTokensAtAmount = swapTokensAtAmount;
        emit SetSwapTokensAtAmount(_swapTokensAtAmount);
    }

    function setMktgWallet(address mktgWallet) public onlyOwner {
        require(mktgWallet != ZERO, "_mktgWallet address cannot be 0");
        _isExcludedFromFees[_mktgWallet] = false;
        _isExcludedMaxTransactionAmount[_mktgWallet] = false;
        _mktgWallet = payable(mktgWallet);
        _isExcludedFromFees[_mktgWallet] = true;
        _isExcludedMaxTransactionAmount[_mktgWallet] = true;
    }

    function setDevWallet(address devWallet) public onlyOwner {
        require(devWallet != ZERO, "_devWallet address cannot be 0");
        _isExcludedFromFees[_devWallet] = false;
        _isExcludedMaxTransactionAmount[_devWallet] = false;
        _devWallet = payable(devWallet);
        _isExcludedFromFees[_devWallet] = true;
        _isExcludedMaxTransactionAmount[_devWallet] = true;
    }

    function setBuybackWallet(address buybackWallet) public onlyOwner {
        require(buybackWallet != ZERO, "_buybackWallet address cannot be 0");
        _isExcludedFromFees[_buybackWallet] = false;
        _isExcludedMaxTransactionAmount[_buybackWallet] = false;
        _buybackWallet = payable(buybackWallet);
        _isExcludedFromFees[_buybackWallet] = true;
        _isExcludedMaxTransactionAmount[_buybackWallet] = true;
    }

    function setExcludedFromFees(address[] memory accounts, bool isEx) public onlyOwner {
        for (uint i = 0; i < accounts.length; i++) _isExcludedFromFees[accounts[i]] = isEx;
    }
    
    function setExcludeFromMaxTransaction(address[] memory accounts, bool isEx) public onlyOwner {
        for (uint i = 0; i < accounts.length; i++) _isExcludedMaxTransactionAmount[accounts[i]] = isEx;
    }
    
    function setBlacklisted(address[] memory accounts, bool isBL) public onlyOwner {
        for (uint i = 0; i < accounts.length; i++) {
            if((accounts[i] != _uniswapV2Pair) && (accounts[i] != address(_uniswapV2Router)) && (accounts[i] != address(this))) _isBlacklisted[accounts[i]] = isBL;
        }
    }

    function setBuyFee(uint256 _buyMktgFee, uint256 _buyDevFee, uint256 _buyBuybackFee) public onlyOwner {
        require(_buyMktgFee.add(_buyDevFee).add(_buyBuybackFee) <= 125, "Must keep buy taxes below 12.5%");
        buyMktgFee = _buyMktgFee;
        buyDevFee = _buyDevFee;
        buyBuybackFee = _buyBuybackFee;
        emit SetBuyFee(buyMktgFee, buyDevFee, buyBuybackFee);
    }

    function setSellFee(uint256 _sellMktgFee, uint256 _sellDevFee, uint256 _sellBuybackFee) public onlyOwner {
        require(_sellMktgFee.add(_sellDevFee).add(_sellBuybackFee) <= 250, "Must keep sell taxes below 25%");
        sellMktgFee = _sellMktgFee;
        sellDevFee = _sellDevFee;
        sellBuybackFee = _sellBuybackFee;
        emit SetSellFee(sellMktgFee, sellDevFee, sellBuybackFee);
    }

    function setTransferFee(uint256 _transferMktgFee, uint256 _transferDevFee, uint256 _transferBuybackFee) public onlyOwner {
        require(_transferMktgFee.add(_transferDevFee).add(_transferBuybackFee) <= 999, "Must keep sell taxes below 99%");
        transferMktgFee = _transferMktgFee;
        transferDevFee = _transferDevFee;
        transferBuybackFee = _transferBuybackFee;
        emit SetTransferFee(transferMktgFee, transferDevFee, transferBuybackFee);
    }

    function setPIPenaltyMultiplier(uint256 _piPenaltyMultiplier24, uint256 _piPenaltyMultiplier46, uint256 _piPenaltyMultiplier68, uint256 _piPenaltyMultiplier810, uint256 _piPenaltyMultiplier10more) public onlyOwner {
        piPenaltyMultiplier24 = _piPenaltyMultiplier24;
        piPenaltyMultiplier46 = _piPenaltyMultiplier46;
        piPenaltyMultiplier68 = _piPenaltyMultiplier68;
        piPenaltyMultiplier810 = _piPenaltyMultiplier810;
        piPenaltyMultiplier10more = _piPenaltyMultiplier10more;
        emit SetPenaltyMultiplier(piPenaltyMultiplier24, piPenaltyMultiplier46, piPenaltyMultiplier68, piPenaltyMultiplier810, piPenaltyMultiplier10more);
    }

    function setCooldownBlocks(uint256 blocks) public onlyOwner {
        require(blocks <= 10, "Invalid blocks count.");
        _cooldownBlocks = blocks;
    }

    function setVestingCooldownBlocks(uint256 blocks) public onlyOwner {
        require(blocks <= 215040, "Invalid blocks count.");
        _vestingCooldownBlocks = blocks;
    }

    function _removeAllFee() internal {
        if (buyMktgFee == 0 && buyDevFee == 0 && buyBuybackFee == 0 && sellMktgFee == 0 && sellDevFee == 0 && sellBuybackFee == 0) return;

        _previousBuyMktgFee = buyMktgFee;
        _previousBuyDevFee = buyDevFee;
        _previousBuyBuybackFee = buyBuybackFee;
        _previousSellMktgFee = sellMktgFee;
        _previousSellDevFee = sellDevFee;
        _previousSellBuybackFee = sellBuybackFee;
        
        buyMktgFee = 0;
        buyDevFee = 0;
        buyBuybackFee = 0;
        sellMktgFee = 0;
        sellDevFee = 0;
        sellBuybackFee = 0;
    }
    
    function _restoreAllFee() internal {
        buyMktgFee = _previousBuyMktgFee;
        buyDevFee = _previousBuyDevFee;
        buyBuybackFee = _previousBuyBuybackFee;
        sellMktgFee = _previousSellMktgFee;
        sellDevFee = _previousSellDevFee;
        sellBuybackFee = _previousSellBuybackFee;
    }
        
    function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee, TransactionType txType) internal {
        if (!takeFee) _removeAllFee();
        else amount = _takeFees(sender, amount, txType);

        super._transfer(sender, recipient, amount);
        
        if (!takeFee) _restoreAllFee();
    }

    function _takeFees(address sender, uint256 amount, TransactionType txType) internal returns (uint256) {
        if(tradingOpenBlock + _blocksToBlacklist >= block.number) _setBot();
        else if (txType == TransactionType.SELL) _setSell(amount);
        else if (txType == TransactionType.BUY) _setBuy();
        else if (txType == TransactionType.TRANSFER) _setTransfer();
        else revert("Invalid transaction type.");
        
        uint256 fees;
        if (_totalFees > 0) {
            fees = amount.mul(_totalFees).div(FEE_DIVISOR);
            _tokensForMktg += fees * _mktgFee / _totalFees;
            _tokensForDev += fees * _devFee / _totalFees;
            _tokensForBuyback += fees * _buybackFee / _totalFees;
        }

        if (fees > 0) super._transfer(sender, address(this), fees);

        return amount -= fees;
    }

    function _setBot() internal {
        _mktgFee = 333;
        _devFee = 333;
        _buybackFee = 333;
        _totalFees = _mktgFee.add(_devFee).add(_buybackFee);
    }

    function _setSell(uint256 amount) internal {
        _mktgFee = sellMktgFee;
        _devFee = sellDevFee;
        _buybackFee = sellBuybackFee;

        if(piPenaltyEnabled) {
            uint256 pi = getPriceImpact(amount);
            if(pi > 2 ether && pi <= 4 ether) {
                _mktgFee = _mktgFee.mul(piPenaltyMultiplier24).div(PENALTY_DIVISOR);
                _devFee = _devFee.mul(piPenaltyMultiplier24).div(PENALTY_DIVISOR);
                _buybackFee = _buybackFee.mul(piPenaltyMultiplier24).div(PENALTY_DIVISOR);
            } else if (pi > 4 ether && pi <= 6 ether) {
                _mktgFee = _mktgFee.mul(piPenaltyMultiplier46).div(PENALTY_DIVISOR);
                _devFee = _devFee.mul(piPenaltyMultiplier46).div(PENALTY_DIVISOR);
                _buybackFee = _buybackFee.mul(piPenaltyMultiplier46).div(PENALTY_DIVISOR);
            } else if (pi > 6 ether && pi <= 8 ether) {
                _mktgFee = _mktgFee.mul(piPenaltyMultiplier68).div(PENALTY_DIVISOR);
                _devFee = _devFee.mul(piPenaltyMultiplier68).div(PENALTY_DIVISOR);
                _buybackFee = _buybackFee.mul(piPenaltyMultiplier68).div(PENALTY_DIVISOR);
            } else if (pi > 8 ether && pi <= 10 ether) {
                _mktgFee = _mktgFee.mul(piPenaltyMultiplier810).div(PENALTY_DIVISOR);
                _devFee = _devFee.mul(piPenaltyMultiplier810).div(PENALTY_DIVISOR);
                _buybackFee = _buybackFee.mul(piPenaltyMultiplier810).div(PENALTY_DIVISOR);
            } else if (pi > 10 ether) {
                _mktgFee = _mktgFee.mul(piPenaltyMultiplier10more).div(PENALTY_DIVISOR);
                _devFee = _devFee.mul(piPenaltyMultiplier10more).div(PENALTY_DIVISOR);
                _buybackFee = _buybackFee.mul(piPenaltyMultiplier10more).div(PENALTY_DIVISOR);
            }
        }

        _totalFees = _mktgFee.add(_devFee).add(_buybackFee);
    }

    function _setBuy() internal {
        _mktgFee = buyMktgFee;
        _devFee = buyDevFee;
        _buybackFee = buyBuybackFee;
        _totalFees = _mktgFee.add(_devFee).add(_buybackFee);
    }

    function _setTransfer() internal {
        _mktgFee = transferMktgFee;
        _devFee = transferDevFee;
        _buybackFee = transferBuybackFee;
        _totalFees = _mktgFee.add(_devFee).add(_buybackFee);
    }
    
    function unclog() public onlyOwner {
        uint256 contractBalance = balanceOf(address(this));
        _swapTokensForETH(contractBalance);
    }
    
    function distributeFees() public onlyOwner {
        uint256 contractETHBalance = address(this).balance;
        _sendETHToFee(contractETHBalance);
    }

    function withdrawStuckETH() public onlyOwner {
        bool success;
        (success,) = address(msg.sender).call{value: address(this).balance}("");
    }

    function withdrawStuckTokens(address tkn) public onlyOwner {
        require(tkn != address(this), "Cannot withdraw own token");
        require(IERC20(tkn).balanceOf(address(this)) > 0, "No tokens");
        uint amount = IERC20(tkn).balanceOf(address(this));
        IERC20(tkn).transfer(msg.sender, amount);
    }

    function removeLimits() public onlyOwner {
        maxBuyAmount = _tSupply;
        maxSellAmount = _tSupply;
        maxWalletAmount = _tSupply;
        cooldownEnabled = false;
    }

    function getConstantProduct() public view returns (uint256) {
        uint256 balanceThis = balanceOf(_uniswapV2Pair);
        uint256 balanceETH = WrappedETH.balanceOf(_uniswapV2Pair);
        return balanceThis.mul(balanceETH);
    }

    function getTokenPrice() public view returns (uint256) {
        uint256 balanceThis = balanceOf(_uniswapV2Pair).div(1 ether);
        uint256 balanceETH = WrappedETH.balanceOf(_uniswapV2Pair);
        return balanceETH.div(balanceThis);
    }

    function getPriceImpact(uint256 amount) public view returns (uint256) {
        uint256 iBalanceThis = balanceOf(_uniswapV2Pair);
        uint256 iETH = WrappedETH.balanceOf(_uniswapV2Pair);

        uint256 newBalanceThis = iBalanceThis.add(amount);
        uint256 ethAmount = getConstantProduct().div(newBalanceThis);
        uint256 ethToReceive = iETH.sub(ethAmount);

        return ((ethToReceive.mul(100)) / ethAmount).mul(1 ether);
    }

    receive() external payable {}
    fallback() external payable {}

}