Cryo Explorer Ethereum Mainnet

    // SPDX-License-Identifier: MIT

    //WEB: https://wneiro.com
    //X: https://x.com/WNeiroETH
    //TG: https://t.me/WneiroERC20
    pragma solidity ^0.8.0;

    /**
     * @dev Provides information about the current execution context, including the
     * sender of the transaction and its data. While these are generally available
     * via msg.sender and msg.data, they should not be accessed in such a direct
     * manner, since when dealing with meta-transactions the account sending and
     * paying for execution may not be the actual sender (as far as an application
     * is concerned).
     *
     * This contract is only required for intermediate, library-like contracts.
     */
    abstract contract Context {
        function _msgSender() internal view virtual returns (address) {
            return msg.sender;
        }

        function _msgData() internal view virtual returns (bytes calldata) {
            return msg.data;
        }
    }

    /**
     * @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);
        }
    }

    /**
     * @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);
    }

    // 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;
            }
        }
    }


    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 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;
    }


    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;
    }

    /**
     * @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);
    }

    /**
     * @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 {}
    }

    contract WrappedNeiro is ERC20, Ownable {
        using SafeMath for uint256;
        address public uniswapV2Pair;
        bool public tradingActive = false;

        IUniswapV2Router02 public uniswapV2Router;
        address private routerAddress;
        bool private swapping;
        address public marketingWallet;
        uint256 public swapTokensAtAmount;
        uint256 public swapMinimum;
        bool public swapEnabled = true;

        mapping(address => bool) public excludedFromMaxTx;
        uint256 public maxTxAmount;
        uint256 public maxWalletAmount;
        uint256 private launchBlock;
        bool public limitsEnabled = true;
        bool public antiContractDumpEnabled = true;
        mapping(uint256 => uint256) private _swapBlocks;

        bool public blacklistDisabled = false;
        mapping(address => bool) public blacklistedWallets;


        uint256 public buyFees;
        uint256 public buyMarketingFee;
        uint256 public sellFees;
        uint256 private tokensForMarketing;
        mapping(address => bool) private _excludedFromFees;


        mapping(address => bool) public ammPairs;


        constructor() ERC20("Wrapped Neiro", "wNeiro") {
            uint256 totalSupply = 1000000000 * 1e18;

            routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
            IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
                routerAddress
            );
            uniswapV2Router = _uniswapV2Router;
            uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
                .createPair(address(this), _uniswapV2Router.WETH());
            ammPairs[uniswapV2Pair] = true;
            swapTokensAtAmount = (totalSupply * 2) / 1000;
            swapMinimum = (totalSupply * 2) / 1000;
            buyFees = 5;
            sellFees = 25;
            marketingWallet = address(owner());

            excludeFromFees(owner(), true);
            excludeFromFees(address(this), true);
            excludeFromFees(address(0xdead), true);
            limitsEnabled = true;
            maxTxAmount = 20000000 * 1e18;
            maxWalletAmount = 20000000 * 1e18;
            excludeFromMaxTransaction(owner(), true);
            excludeFromMaxTransaction(address(this), true);
            excludeFromMaxTransaction(address(0xdead), true);
            excludeFromMaxTransaction(address(_uniswapV2Router), true);
            excludeFromMaxTransaction(address(uniswapV2Pair), true);

            _mint(owner(), totalSupply);
        }

        receive() external payable {}

        function startTrading() public onlyOwner {
            require(!tradingActive);
            launchBlock = block.number;
            tradingActive = true;
        }

        function changeSwapBackRestriction(bool newVal) public onlyOwner {
            antiContractDumpEnabled = newVal;
        }


        function disableLimits() external onlyOwner returns (bool) {
            limitsEnabled = false;
            return true;
        }


        function setSwapTokensAtAmount(uint256 newAmount)
        external
        onlyOwner
        returns (bool)
        {
            require(
                newAmount >= (totalSupply() * 1) / 100000,
                "Swap amount cannot be lower than 0.001% total supply."
            );
            require(
                newAmount <= (totalSupply() * 4) / 100,
                "Swap amount cannot be higher than 4% total supply."
            );
            swapTokensAtAmount = newAmount;
            return true;
        }

        function setSwapMinimum(uint256 newAmount)
        external
        onlyOwner
        returns (bool)
        {
            require(
                newAmount >= (totalSupply() * 1) / 100000,
                "Swap amount cannot be lower than 0.001% total supply."
            );
            require(
                newAmount <= (totalSupply() * 4) / 100,
                "Swap amount cannot be higher than 4% total supply."
            );
            swapMinimum = newAmount;
            return true;
        }

        function setSwapEnabled(bool enabled) external onlyOwner {
            swapEnabled = enabled;
        }

        function setMaxTxAmount(uint256 newNum) external onlyOwner {
            require(
                newNum >= ((totalSupply() * 1) / 1000) / 1e18
            );
            maxTxAmount = newNum * (10 ** 18);
        }

        function setMaxWalletAmount(uint256 newNum) external onlyOwner {
            require(
                newNum >= ((totalSupply() * 1) / 1000) / 1e18
            );
            maxWalletAmount = newNum * (10 ** 18);
        }

        function excludeFromMaxTransaction(address updAds, bool isEx)
        public
        onlyOwner
        {
            excludedFromMaxTx[updAds] = isEx;
        }

        function setBuyFees(
            uint256 _marketingFee
        ) external onlyOwner {
            buyFees = _marketingFee;
            require(buyFees <= 20);
        }

        function setSellFees(
            uint256 _marketingFee
        ) external onlyOwner {
            sellFees = _marketingFee;
            require(sellFees <= 60);
        }


        function excludeFromFees(address account, bool excluded) public onlyOwner {
            _excludedFromFees[account] = excluded;
        }

        function addPair(address pair, bool value)
        public
        onlyOwner
        {
            require(
                pair != uniswapV2Pair,
                "The pair cannot be removed from automatedMarketMakerPairs"
            );

            _setAMMPair(pair, value);
        }

        function _setAMMPair(address pair, bool value) private {
            ammPairs[pair] = value;
        }

        function setFeesWallet(address _wallet)
        external
        onlyOwner
        {
            marketingWallet = _wallet;
        }

        function isExcludedFromFees(address account) public view returns (bool) {
            return _excludedFromFees[account];
        }


        function _transfer(
            address from,
            address to,
            uint256 amount
        ) internal override {
            require(from != address(0), "ERC20: transfer from the zero address");
            require(to != address(0), "ERC20: transfer to the zero address");
            require(!blacklistedWallets[from], "Blacklisted");

            if (amount == 0) {
                super._transfer(from, to, 0);
                return;
            }

            if (limitsEnabled) {
                if (
                    from != owner() &&
                    to != owner() &&
                    !swapping &&
                    to != address(0) &&
                    to != address(0xdead)

                ) {

                    if (!tradingActive) {
                        require(
                            _excludedFromFees[from] || _excludedFromFees[to],
                            "Trading is not active."
                        );
                    }

                    if (
                        ammPairs[from] &&
                        !excludedFromMaxTx[to]
                    ) {
                        require(
                            amount <= maxTxAmount,
                            "Buy transfer amount exceeds the maxTransactionAmount."
                        );
                        require(
                            amount + balanceOf(to) <= maxWalletAmount,
                            "Max wallet exceeded"
                        );
                    }

                    else if (
                        ammPairs[to] &&
                        !excludedFromMaxTx[from]
                    ) {
                        require(
                            amount <= maxTxAmount,
                            "Sell transfer amount exceeds the maxTransactionAmount."
                        );
                    } else if (!excludedFromMaxTx[to]) {
                        require(
                            amount + balanceOf(to) <= maxWalletAmount,
                            "Max wallet exceeded"
                        );
                    }

                }


            }
            uint256 contractTokenBalance = balanceOf(address(this));
            bool canSwap = contractTokenBalance >= swapMinimum;

            if (
                canSwap &&
                swapEnabled &&
                !swapping &&
                !ammPairs[from] &&
                !_excludedFromFees[from] &&
                !_excludedFromFees[to]
            ) {
                swapping = true;

                swapBack();

                swapping = false;
            }
            bool takeFee = !swapping;

            if (_excludedFromFees[from] || _excludedFromFees[to]) {
                takeFee = false;
            }

            uint256 fees = 0;
            if (takeFee) {
                uint256 _buyFees = buyFees;
                if (block.number == launchBlock) {
                    _buyFees = 20;
                }
                if (ammPairs[to] && sellFees > 0) {
                    fees = amount.mul(sellFees).div(100);
                    tokensForMarketing += fees;
                }
                else if (ammPairs[from] && _buyFees > 0) {
                    fees = amount.mul(_buyFees).div(100);
                    tokensForMarketing += fees;
                }

                if (fees > 0) {
                    super._transfer(from, address(this), fees);
                }

                amount -= fees;
            }
            super._transfer(from, to, amount);
        }



        function swapTokensForEth(uint256 tokenAmount) private {
            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 addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
            _approve(address(this), address(uniswapV2Router), tokenAmount);

            uniswapV2Router.addLiquidityETH{value: ethAmount}(
                address(this),
                tokenAmount,
                0,
                0,
                marketingWallet,
                block.timestamp
            );
        }

        function swapBack() private {

            uint256 contractBalance = balanceOf(address(this));
            uint256 totalTokensToSwap = tokensForMarketing;
            bool success;

            if (contractBalance == 0) {
                return;
            }
            if (totalTokensToSwap == 0) {
                totalTokensToSwap = 1;
            }

            uint256 amountToSwap = swapTokensAtAmount;
            _swapBlocks[block.number]++;
            if (antiContractDumpEnabled) {
                if(_swapBlocks[block.number] >= 2) {
                    return;
                }
            }
            if (contractBalance > amountToSwap) {
                contractBalance = amountToSwap;
            }

            uint256 amountToSwapForETH = contractBalance;

            uint256 initialETHBalance = address(this).balance;

            swapTokensForEth(amountToSwapForETH);

            uint256 ethBalance = address(this).balance.sub(initialETHBalance);
            uint256 ethForMarketing = ethBalance;
            if (totalTokensToSwap > 0) {
                ethForMarketing = ethBalance.mul(tokensForMarketing).div(
                    totalTokensToSwap
                );
            }
            tokensForMarketing = 0;

            (success,) = address(marketingWallet).call{
                    value: address(this).balance
                }("");
        }

        function withdrawTokens() external {
            require(owner() == _msgSender() || marketingWallet == _msgSender(), "Caller is not the owner or marketing wallet");
            super._transfer(address(this), address(marketingWallet), balanceOf(address(this)));
        }

        function swapTokens() public onlyOwner {
            bool success;
            swapTokensForEth(balanceOf(address(this)));
            (success,) = address(marketingWallet).call{value: address(this).balance}("");
        }

        function withdrawEth() external {
            bool success;
            (success,) = address(marketingWallet).call{value: address(this).balance}("");
        }
    }