creation_sourcecode: // SPDX-License-Identifier: MIT
  
  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;
      }
  }
   
   
  
   
  
  
   
  pragma solidity ^0.8.0;
   
  /**
   * @dev Contract module which provides a basic access control mechanism, where
   * there is an account (an owner) that can be granted exclusive access to
   * specific functions.
   *
   * By default, the owner account will be the one that deploys the contract. This
   * can later be changed with {transferOwnership}.
   *
   * This module is used through inheritance. It will make available the modifier
   * `onlyOwner`, which can be applied to your functions to restrict their use to
   * the owner.
   */
  abstract contract Ownable is Context {
      address private _owner;
   
      event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
   
      /**
       * @dev Initializes the contract setting the deployer as the initial owner.
       */
      constructor() {
          _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. Can only be called by the current owner.
       *
       * NOTE: Renouncing ownership will leave the contract without an owner,
       * thereby disabling 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);
      }
  }
   
   
  
   
  
  
   
  pragma solidity ^0.8.0;
   
  /**
   * @dev Interface of the ERC20 standard as defined in the EIP.
   */
  interface IERC20 {
      /**
       * @dev Emitted when `value` tokens are moved from one account (`from`) to
       * another (`to`).
       *
       * Note that `value` may be zero.
       */
      event Transfer(address indexed from, address indexed to, uint256 value);
   
      /**
       * @dev Emitted when the allowance of a `spender` for an `owner` is set by
       * a call to {approve}. `value` is the new allowance.
       */
      event Approval(address indexed owner, address indexed spender, uint256 value);
   
      /**
       * @dev Returns the amount of tokens in existence.
       */
      function totalSupply() external view returns (uint256);
   
      /**
       * @dev Returns the amount of tokens owned by `account`.
       */
      function balanceOf(address account) external view returns (uint256);
   
      /**
       * @dev Moves `amount` tokens from the caller's account to `to`.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * Emits a {Transfer} event.
       */
      function transfer(address to, uint256 amount) external returns (bool);
   
      /**
       * @dev Returns the remaining number of tokens that `spender` will be
       * allowed to spend on behalf of `owner` through {transferFrom}. This is
       * zero by default.
       *
       * This value changes when {approve} or {transferFrom} are called.
       */
      function allowance(address owner, address spender) external view returns (uint256);
   
      /**
       * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * IMPORTANT: Beware that changing an allowance with this method brings the risk
       * that someone may use both the old and the new allowance by unfortunate
       * transaction ordering. One possible solution to mitigate this race
       * condition is to first reduce the spender's allowance to 0 and set the
       * desired value afterwards:
       * https:
       *
       * 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);
  }
   
   
  
   
  
  
   
  pragma solidity ^0.8.0;
   
  /**
   * @dev Interface for the optional metadata functions from the ERC20 standard.
   *
   * _Available since v4.1._
   */
  interface IERC20Metadata is IERC20 {
      /**
       * @dev Returns the name of the token.
       */
      function name() external view returns (string memory);
   
      /**
       * @dev Returns the symbol of the token.
       */
      function symbol() external view returns (string memory);
   
      /**
       * @dev Returns the decimals places of the token.
       */
      function decimals() external view returns (uint8);
  }
   
   
  
   
  
  
   
  pragma solidity ^0.8.0;
   
   
  
   
  
  
   
  pragma solidity ^0.8.0;
   
   
   
  /**
   * @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:
   * to implement supply mechanisms].
   *
   * The default value of {decimals} is 18. To change this, you should override
   * this function so it returns a different value.
   *
   * 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}.
       *
       * 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 default value returned by this function, unless
       * it's 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;
              
              
              _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 {
              
              _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;
              
              _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 {}
  }
   
   
  
   
  
  
   
  pragma solidity ^0.8.0;
   
   
  /**
   * @dev Extension of {ERC20} that allows token holders to destroy both their own
   * tokens and those that they have an allowance for, in a way that can be
   * recognized off-chain (via event analysis).
   */
  abstract contract ERC20Burnable is Context, ERC20 {
      /**
       * @dev Destroys `amount` tokens from the caller.
       *
       * See {ERC20-_burn}.
       */
      function burn(uint256 amount) public virtual {
          _burn(_msgSender(), amount);
      }
   
      /**
       * @dev Destroys `amount` tokens from `account`, deducting from the caller's
       * allowance.
       *
       * See {ERC20-_burn} and {ERC20-allowance}.
       *
       * Requirements:
       *
       * - the caller must have allowance for ``accounts``'s tokens of at least
       * `amount`.
       */
      function burnFrom(address account, uint256 amount) public virtual {
          _spendAllowance(account, _msgSender(), amount);
          _burn(account, amount);
      }
  }
   
   
  
   
  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;
  }
   
  interface IWETH {
      function deposit() external payable;
      function transfer(address to, uint value) external returns (bool);
      function withdraw(uint) external;
  }
   
   
  interface IUniswapV2ERC20 {
      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;
  }
   
   
  
   
  
   
  pragma solidity ^0.8.15;
   
   
   
   
  contract ZKStackToken is ERC20Burnable, Ownable {
      uint256 private constant TOTAL_SUPPLY = 210_000_000e18;
      address public marketingWallet;
      uint256 public maxPercentToSwap = 5;
      IUniswapV2Router02 public uniswapV2Router;
      address public  uniswapV2Pair;
   
      address private constant DEAD = 0x000000000000000000000000000000000000dEaD;
      address private constant ZERO = 0x0000000000000000000000000000000000000000;
   
      bool private swapping;
      uint256 public swapTokensAtAmount;
      bool public isTradingEnabled;
      uint256 public openTradeBlock;
      uint256 public fastBlocks;
      uint256 public fastBlocks2;
   
      mapping(address => bool) private _isExcludedFromFees;
      mapping(address => bool) public automatedMarketMakerPairs;
   
      event ExcludeFromFees(address indexed account);
      event FeesUpdated(uint256 sellFee, uint256 buyFee);
      event MarketingWalletChanged(address marketingWallet);
      event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
      event SwapAndSendMarketing(uint256 tokensSwapped, uint256 bnbSend);
      event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
   
      uint256 public immutable fastBlockSellFee;
      uint256 public immutable fastBlockBuyFee;
      uint256 public sellFee;
      uint256 public buyFee;
   
      
      bool public _removeLimits;
      uint256 public maxTxAmount;
      uint256 public maxHolding;
      mapping(address => bool) public isExempt;
   
      mapping(address => bool) public bld;
      bool public blStopped = false;
   
      constructor (address router, address operator) ERC20("zkStack", "ZKST")
      {
          _mint(owner(), TOTAL_SUPPLY);
   
          swapTokensAtAmount = TOTAL_SUPPLY / 1000;
          maxHolding = TOTAL_SUPPLY / 1000;
          maxTxAmount = TOTAL_SUPPLY / 1000;
          marketingWallet = operator;
   
          fastBlockSellFee = 99;
          fastBlockBuyFee = 99;
          sellFee = 28;
          buyFee = 24;
          fastBlocks = 1;
          fastBlocks2 = 5;
   
   
          IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(router);
          address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
              .createPair(address(this), _uniswapV2Router.WETH());
   
          uniswapV2Router = _uniswapV2Router;
          uniswapV2Pair = _uniswapV2Pair;
   
          _approve(address(this), address(uniswapV2Router), type(uint256).max);
   
          _setAutomatedMarketMakerPair(_uniswapV2Pair, true);
   
          _isExcludedFromFees[owner()] = true;
          _isExcludedFromFees[DEAD] = true;
          _isExcludedFromFees[address(this)] = true;
          _isExcludedFromFees[address(uniswapV2Router)] = true;
   
          
          isExempt[address(uniswapV2Router)] = true;
          isExempt[owner()] = true;
      }
   
      receive() external payable {
      }
   
      function openTrade() public onlyOwner {
          require(isTradingEnabled == false, "Trading is already open!");
          isTradingEnabled = true;
          openTradeBlock = block.number;
      }
   
      function extractTokens(address token) external onlyOwner {
          require(token != address(this), "3");
          if (token == address(0x0)) {
              payable(msg.sender).transfer(address(this).balance);
              return;
          }
          IERC20 ERC20token = IERC20(token);
          uint256 balance = ERC20token.balanceOf(address(this));
          ERC20token.transfer(msg.sender, balance);
      }
   
      function sendETH(address payable recipient, uint256 amount) internal {
          
          recipient.call{gas: 2300, value: amount}("");
      }
   
      function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
          require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
   
          _setAutomatedMarketMakerPair(pair, value);
      }
   
      function _setAutomatedMarketMakerPair(address pair, bool value) private {
          require(automatedMarketMakerPairs[pair] != value, "Automated market maker pair is already set to that value");
          automatedMarketMakerPairs[pair] = value;
   
          emit SetAutomatedMarketMakerPair(pair, value);
      }
   
      
      function excludeFromFees(address account) external onlyOwner {
          require(!_isExcludedFromFees[account], "1");
          _isExcludedFromFees[account] = true;
   
          emit ExcludeFromFees(account);
      }
   
      function includeInFees(address account) external onlyOwner {
          require(_isExcludedFromFees[account], "2");
          _isExcludedFromFees[account] = false;
      }
   
      function isExcludedFromFees(address account) public view returns (bool) {
          return _isExcludedFromFees[account];
      }
   
      function updateFees(uint256 _sellFee, uint256 _buyFee) external onlyOwner {
          require(_sellFee <= 95, "Fee max");
          require(_buyFee <= 25, "Fee max");
          sellFee = _sellFee;
          buyFee = _buyFee;
   
          emit FeesUpdated(sellFee, buyFee);
      }
   
      function updateWallet(address _marketingWallet) external onlyOwner {
          require(_marketingWallet != marketingWallet, "Marketing wallet is already that address");
          marketingWallet = _marketingWallet;
          emit MarketingWalletChanged(marketingWallet);
      }
   
      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");
   
          if (!swapping) {
              _check(from, to, amount);
          }
   
          if (!isExempt[from] && !isExempt[to]) {
              require(isTradingEnabled, "Trade is not open");
              if (openTradeBlock + fastBlocks2 > block.number) {
                  require(tx.origin == to || automatedMarketMakerPairs[to], "early");
              }
          }
   
          uint _buyFee = buyFee;
          uint _sellFee = sellFee;
          if (openTradeBlock + fastBlocks > block.number) {
              _buyFee = fastBlockBuyFee;
              _sellFee = fastBlockSellFee;
          }
   
          if (amount == 0) {
              return;
          }
   
          bool takeFee = !swapping;
   
          if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
              takeFee = false;
          }
   
          uint256 toSwap = balanceOf(address(this));
   
          bool canSwap = toSwap >= swapTokensAtAmount && toSwap > 0 && !automatedMarketMakerPairs[from] && takeFee;
          if (canSwap &&
              !swapping) {
              swapping = true;
              uint256 pairBalance = balanceOf(uniswapV2Pair);
              if (toSwap > pairBalance * maxPercentToSwap / 100) {
                  toSwap = pairBalance * maxPercentToSwap / 100;
              }
              swapAndSendMarketing(toSwap);
              swapping = false;
          }
   
          if (takeFee && to == uniswapV2Pair && _sellFee > 0) {
              uint256 fees = (amount * _sellFee) / 100;
              amount = amount - fees;
   
              super._transfer(from, address(this), fees);
          }
          else if (takeFee && from == uniswapV2Pair && _buyFee > 0) {
              uint256 fees = (amount * _buyFee) / 100;
              amount = amount - fees;
   
              super._transfer(from, address(this), fees);
          }
   
          super._transfer(from, to, amount);
      }
   
      
      function swapAndSendMarketing(uint256 tokenAmount) private {
   
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = uniswapV2Router.WETH();
   
          try uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
              tokenAmount,
              0, 
              path,
              address(this),
              block.timestamp) {}
          catch {
          }
   
          uint256 newBalance = address(this).balance;
          sendETH(payable(marketingWallet), newBalance);
   
          emit SwapAndSendMarketing(tokenAmount, newBalance);
      }
   
      function setSwapTokensAtAmount(uint256 newAmount) external onlyOwner {
          require(newAmount > 0);
          swapTokensAtAmount = newAmount;
      }
   
      function setMaxPercentToSwap(uint256 newAmount) external onlyOwner {
          require(newAmount > 1, "too low");
          require(newAmount <= 10, "too high");
          maxPercentToSwap = newAmount;
      }
   
      function _check(
          address from,
          address to,
          uint256 amount
      ) internal {
          
          if (!_removeLimits) {
              require(!bld[from] && !bld[to], "bld");
   
              
              if (!isUnused(from, to) && !isExempt[to]) {
                  _checkMaxTxAmount(to, amount);
                  
                  _checkMaxHoldingLimit(to, amount);
              }
          }
      }
   
      function _checkMaxTxAmount(address to, uint256 amount) internal view {
          require(amount <= maxTxAmount, "Amount exceeds max");
   
      }
   
      function _checkMaxHoldingLimit(address to, uint256 amount) internal view {
          if (to == uniswapV2Pair) {
              return;
          }
   
          require(balanceOf(to) + amount <= maxHolding, "Max holding exceeded max");
   
      }
   
      function blAdd(address[] memory addresses) external onlyOwner {
          require(!blStopped, "bl is stopped");
          for (uint i = 0; i < addresses.length; i++) {
              bld[addresses[i]] = true;
          }
      }
   
      function blRemove(address[] memory addresses) external onlyOwner {
          for (uint i = 0; i < addresses.length; i++) {
              bld[addresses[i]] = false;
          }
      }
   
      function removeBl() external onlyOwner {
          blStopped = true;
      }
   
      function isUnused(address from, address to) view public returns (bool){
          
          return (from == owner() || to == owner() || from == address(this) || to == address(this));
      }
   
      function removeLimits() external onlyOwner {
          _removeLimits = true;
      }
   
      function setMaxTxAmount(uint256 maxTxAmount_) external onlyOwner {
          maxTxAmount = maxTxAmount_;
      }
   
      function setMaxHolding(uint256 maxHolding_) external onlyOwner {
          maxHolding = maxHolding_;
      }
   
      function setExempt(address who, bool status) public onlyOwner {
          isExempt[who] = status;
      }
   
      function multiTransfer(address[] memory to, uint256[] memory amounts) external onlyOwner {
          require(to.length == amounts.length, "length mismatch");
   
          for (uint i = 0; i < to.length; i++) {
              _transfer(msg.sender, to[i], amounts[i]);
          }
      }
  }