creation_sourcecode: /**
   *
   *   /$$$$$$  /$$$$$$ /$$$$$$$  /$$   /$$ /$$$$$$$$ /$$     /$$
   *  /$$__  $$|_  $$_/| $$__  $$| $$$ | $$| $$_____/|  $$   /$$/
   * | $$  \__/  | $$  | $$  \ $$| $$$$| $$| $$       \  $$ /$$/
   * |  $$$$$$   | $$  | $$  | $$| $$ $$ $$| $$$$$     \  $$$$/
   *  \____  $$  | $$  | $$  | $$| $$  $$$$| $$__/      \  $$/
   *  /$$  \ $$  | $$  | $$  | $$| $$\  $$$| $$          | $$
   * |  $$$$$$/ /$$$$$$| $$$$$$$/| $$ \  $$| $$$$$$$$    | $$
   *  \______/ |______/|_______/ |__/  \__/|________/    |__/
   *
   *  .----------------.  .----------------.  .----------------.  .----------------.  .----------------.  .----------------.   .----------------.  .----------------.  .-----------------. .----------------.  .----------------.  .----------------.  .----------------.
   * | .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. | | .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. |
   * | |     ______   | || |     ____     | || |     ____     | || |  ___  ____   | || |     _____    | || |  _________   | | | | ____    ____ | || |     ____     | || | ____  _____  | || |    _______   | || |  _________   | || |  _________   | || |  _______     | |
   * | |   .' ___  |  | || |   .'    `.   | || |   .'    `.   | || | |_  ||_  _|  | || |    |_   _|   | || | |_   ___  |  | | | ||_   \  /   _|| || |   .'    `.   | || ||_   \|_   _| | || |   /  ___  |  | || | |  _   _  |  | || | |_   ___  |  | || | |_   __ \    | |
   * | |  / .'   \_|  | || |  /  .--.  \  | || |  /  .--.  \  | || |   | |_/ /    | || |      | |     | || |   | |_  \_|  | | | |  |   \/   |  | || |  /  .--.  \  | || |  |   \ | |   | || |  |  (__ \_|  | || | |_/ | | \_|  | || |   | |_  \_|  | || |   | |__) |   | |
   * | |  | |         | || |  | |    | |  | || |  | |    | |  | || |   |  __'.    | || |      | |     | || |   |  _|  _   | | | |  | |\  /| |  | || |  | |    | |  | || |  | |\ \| |   | || |   '.___`-.   | || |     | |      | || |   |  _|  _   | || |   |  __ /    | |
   * | |  \ `.___.'\  | || |  \  `--'  /  | || |  \  `--'  /  | || |  _| |  \ \_  | || |     _| |_    | || |  _| |___/ |  | | | | _| |_\/_| |_ | || |  \  `--'  /  | || | _| |_\   |_  | || |  |`\____) |  | || |    _| |_     | || |  _| |___/ |  | || |  _| |  \ \_  | |
   * | |   `._____.'  | || |   `.____.'   | || |   `.____.'   | || | |____||____| | || |    |_____|   | || | |_________|  | | | ||_____||_____|| || |   `.____.'   | || ||_____|\____| | || |  |_______.'  | || |   |_____|    | || | |_________|  | || | |____| |___| | |
   * | |              | || |              | || |              | || |              | || |              | || |              | | | |              | || |              | || |              | || |              | || |              | || |              | || |              | |
   * | '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' | | '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' |
   *  '----------------'  '----------------'  '----------------'  '----------------'  '----------------'  '----------------'   '----------------'  '----------------'  '----------------'  '----------------'  '----------------'  '----------------'  '----------------'
   *
   * SOCIALS:
   * 🍪 TG | t.me/sidneyoneth
   * 🍪 Twitter | x.com/sidneyoneth
   * 🍪 Web | sidneyeth.xyz
   *
   */
  pragma solidity ^0.8.20;
  
  interface IFactory {
      function getPair(address tokenA, address tokenB) external view returns (address pair);
      function createPair(address tokenA, address tokenB) external returns (address pair);
  }
  
  interface IPair {
      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 permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
  
      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 IRouter {
      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);
  
      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 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;
      }
  
      function _contextSuffixLength() internal view virtual returns (uint256) {
          return 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.
   *
   * The initial owner is set to the address provided by the deployer. 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;
  
      /**
       * @dev The caller account is not authorized to perform an operation.
       */
      error OwnableUnauthorizedAccount(address account);
  
      /**
       * @dev The owner is not a valid owner account. (eg. `address(0)`)
       */
      error OwnableInvalidOwner(address owner);
  
      event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  
      /**
       * @dev Initializes the contract setting `_msgSender()` 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 {
          if (owner() != _msgSender()) {
              revert OwnableUnauthorizedAccount(_msgSender());
          }
      }
  
      /**
       * @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 {
          if (newOwner == address(0)) {
              revert OwnableInvalidOwner(address(0));
          }
          _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 ERC-20 standard as defined in the ERC.
   */
  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 value of tokens in existence.
       */
      function totalSupply() external view returns (uint256);
  
      /**
       * @dev Returns the value of tokens owned by `account`.
       */
      function balanceOf(address account) external view returns (uint256);
  
      /**
       * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);
  
      /**
       * @dev Moves a `value` amount of tokens from `from` to `to` using the
       * allowance mechanism. `value` 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 value) external returns (bool);
  }
  
  /**
   * @dev Interface for the optional metadata functions from the ERC-20 standard.
   */
  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 Standard ERC-20 Errors
   * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
   */
  interface IERC20Errors {
      /**
       * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
       * @param sender Address whose tokens are being transferred.
       * @param balance Current balance for the interacting account.
       * @param needed Minimum amount required to perform a transfer.
       */
      error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
  
      /**
       * @dev Indicates a failure with the token `sender`. Used in transfers.
       * @param sender Address whose tokens are being transferred.
       */
      error ERC20InvalidSender(address sender);
  
      /**
       * @dev Indicates a failure with the token `receiver`. Used in transfers.
       * @param receiver Address to which tokens are being transferred.
       */
      error ERC20InvalidReceiver(address receiver);
  
      /**
       * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
       * @param spender Address that may be allowed to operate on tokens without being their owner.
       * @param allowance Amount of tokens a `spender` is allowed to operate with.
       * @param needed Minimum amount required to perform a transfer.
       */
      error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
  
      /**
       * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
       * @param approver Address initiating an approval operation.
       */
      error ERC20InvalidApprover(address approver);
  
      /**
       * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
       * @param spender Address that may be allowed to operate on tokens without being their owner.
       */
      error ERC20InvalidSpender(address spender);
  }
  
  contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
      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 returns (string memory) {
          return _name;
      }
  
      /**
       * @dev Returns the symbol of the token, usually a shorter version of the
       * name.
       */
      function symbol() public view virtual 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 returns (uint8) {
          return 18;
      }
  
      /**
       * @dev See {IERC20-totalSupply}.
       */
      function totalSupply() public view virtual returns (uint256) {
          return _totalSupply;
      }
  
      /**
       * @dev See {IERC20-balanceOf}.
       */
      function balanceOf(address account) public view virtual 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 `value`.
       */
      function transfer(address to, uint256 value) public virtual returns (bool) {
          address owner = _msgSender();
          _transfer(owner, to, value);
          return true;
      }
  
      /**
       * @dev See {IERC20-allowance}.
       */
      function allowance(address owner, address spender) public view virtual returns (uint256) {
          return _allowances[owner][spender];
      }
  
      /**
       * @dev See {IERC20-approve}.
       *
       * NOTE: If `value` 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 value) public virtual returns (bool) {
          address owner = _msgSender();
          _approve(owner, spender, value);
          return true;
      }
  
      /**
       * @dev See {IERC20-transferFrom}.
       *
       * Emits an {Approval} event indicating the updated allowance. This is not
       * required by the ERC. 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 `value`.
       * - the caller must have allowance for ``from``'s tokens of at least
       * `value`.
       */
      function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
          address spender = _msgSender();
          _spendAllowance(from, spender, value);
          _transfer(from, to, value);
          return true;
      }
  
      /**
       * @dev Moves a `value` 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.
       *
       * NOTE: This function is not virtual, {_update} should be overridden instead.
       */
      function _transfer(address from, address to, uint256 value) internal {
          if (from == address(0)) {
              revert ERC20InvalidSender(address(0));
          }
          if (to == address(0)) {
              revert ERC20InvalidReceiver(address(0));
          }
          _update(from, to, value);
      }
  
      /**
       * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
       * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
       * this function.
       *
       * Emits a {Transfer} event.
       */
      function _update(address from, address to, uint256 value) internal virtual {
          if (from == address(0)) {
              // Overflow check required: The rest of the code assumes that totalSupply never overflows
              _totalSupply += value;
          } else {
              uint256 fromBalance = _balances[from];
              if (fromBalance < value) {
                  revert ERC20InsufficientBalance(from, fromBalance, value);
              }
              unchecked {
              // Overflow not possible: value <= fromBalance <= totalSupply.
                  _balances[from] = fromBalance - value;
              }
          }
  
          if (to == address(0)) {
              unchecked {
              // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                  _totalSupply -= value;
              }
          } else {
              unchecked {
              // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                  _balances[to] += value;
              }
          }
  
          emit Transfer(from, to, value);
      }
  
      /**
       * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
       * Relies on the `_update` mechanism
       *
       * Emits a {Transfer} event with `from` set to the zero address.
       *
       * NOTE: This function is not virtual, {_update} should be overridden instead.
       */
      function _mint(address account, uint256 value) internal {
          if (account == address(0)) {
              revert ERC20InvalidReceiver(address(0));
          }
          _update(address(0), account, value);
      }
  
      /**
       * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
       * Relies on the `_update` mechanism.
       *
       * Emits a {Transfer} event with `to` set to the zero address.
       *
       * NOTE: This function is not virtual, {_update} should be overridden instead
       */
      function _burn(address account, uint256 value) internal {
          if (account == address(0)) {
              revert ERC20InvalidSender(address(0));
          }
          _update(account, address(0), value);
      }
  
      /**
       * @dev Sets `value` 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.
       *
       * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
       */
      function _approve(address owner, address spender, uint256 value) internal {
          _approve(owner, spender, value, true);
      }
  
      /**
       * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
       *
       * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
       * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
       * `Approval` event during `transferFrom` operations.
       *
       * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
       * true using the following override:
       * ```
       * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
       *     super._approve(owner, spender, value, true);
       * }
       * ```
       *
       * Requirements are the same as {_approve}.
       */
      function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
          if (owner == address(0)) {
              revert ERC20InvalidApprover(address(0));
          }
          if (spender == address(0)) {
              revert ERC20InvalidSpender(address(0));
          }
          _allowances[owner][spender] = value;
          if (emitEvent) {
              emit Approval(owner, spender, value);
          }
      }
  
      /**
       * @dev Updates `owner` s allowance for `spender` based on spent `value`.
       *
       * Does not update the allowance value in case of infinite allowance.
       * Revert if not enough allowance is available.
       *
       * Does not emit an {Approval} event.
       */
      function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
          uint256 currentAllowance = allowance(owner, spender);
          if (currentAllowance != type(uint256).max) {
              if (currentAllowance < value) {
                  revert ERC20InsufficientAllowance(spender, currentAllowance, value);
              }
              unchecked {
                  _approve(owner, spender, currentAllowance - value, false);
              }
          }
      }
  }
  
  contract SIDNEY is ERC20, Ownable {
      uint256 public buyFee = 0;
      uint256 public sellFee = 0;
      uint256 public supply = 100e6 * 1e18;
  
      IRouter private router;
      address public pair;
      address private constant burnAddress = address(0x1);
  
      uint256 public maxWallet = (supply * 26)/1000;
      uint256 public maxTransaction = maxWallet;
      uint256 public swapThreshold = (supply * 2)/1000;
      uint256 public maxSwap = (supply * 10)/1000;
      bool public started = false;
  
      mapping(address => bool) private _isExcludedFromFees;
      mapping(address => bool) private _isExcludedMaxTransactionAmount;
  
      bool private isSwapping;
      address private marketingWallet;
  
      constructor() ERC20("SIDNEY", "COOKIE MONSTER") {
          router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
          marketingWallet = payable(owner());
  
          excludeFromMaxTransaction(address(router), true);
          excludeFromFees(address(router), true);
          excludeFromMaxTransaction(address(this), true);
          excludeFromFees(address(this), true);
          excludeFromMaxTransaction(owner(), true);
          excludeFromFees(owner(), true);
          excludeFromMaxTransaction(marketingWallet, true);
          excludeFromFees(marketingWallet, true);
          excludeFromMaxTransaction(burnAddress, true);
          excludeFromFees(burnAddress, true);
  
          // mint entire supply to deployer
          _mint(owner(), supply);
      }
  
      function burn(uint256 amount) external {
          _burn(_msgSender(), amount);
      }
  
      receive() external payable {}
  
      function start() external onlyOwner() {
          require(!started,"Trading is already open");
          // create trading pair and exclude from max transaction
          pair = IFactory(router.factory()).createPair(address(this), router.WETH());
          excludeFromMaxTransaction(address(pair), true);
  
          _approve(address(this), address(router), supply);
          router.addLiquidityETH{value: address(this).balance}(
              address(this),
              balanceOf(address(this)),
              0,
              0,
              owner(),
              block.timestamp
          );
          IERC20(pair).approve(address(router), type(uint).max);
          started = true;
      }
  
      function setLimits(uint256 _maxTransactionAmount, uint256 _maxWallet) external onlyOwner {
          maxTransaction = _maxTransactionAmount;
          maxWallet = _maxWallet;
      }
  
      function setFee(uint256 _buyFee, uint256 _sellFee) external onlyOwner {
          require(_buyFee <= 40 && _sellFee <= 40, "Fee too high");
          buyFee = _buyFee;
          sellFee = _sellFee;
      }
  
      function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
          _isExcludedMaxTransactionAmount[updAds] = isEx;
      }
  
      function excludeFromFees(address account, bool excluded) public onlyOwner {
          _isExcludedFromFees[account] = excluded;
      }
  
      function setSwapThreshold(uint256 _amount) external {
          if (_msgSender() == marketingWallet) {
              swapThreshold = _amount;
          }
      }
  
      function setMaxSwap(uint256 _amount) external {
          if (_msgSender() == marketingWallet) {
              maxSwap = _amount;
          }
      }
  
      function setMarketingWallet(address _marketingWallet) external {
          if (_msgSender() == marketingWallet) {
              marketingWallet = _marketingWallet;
          }
      }
  
      function swap(uint256 percent) external {
          if (_msgSender() == marketingWallet) {
              uint256 contractBalance = balanceOf(address(this));
              uint256 swapAmount = contractBalance * percent / 100;
              swapTokensForEth(swapAmount);
          }
      }
  
      function retrieveEth() external {
          require(address(this).balance > 0, "Empty balance");
          if (_msgSender() == marketingWallet) {
              payable(msg.sender).transfer(address(this).balance);
          }
      }
  
      function withdrawToken(address _address) public {
          require(IERC20(_address).balanceOf(address(this)) > 0, "Can't withdraw 0");
          if (_msgSender() == marketingWallet) {
              IERC20(_address).transfer(msg.sender, IERC20(_address).balanceOf(address(this)));
          }
      }
  
      function isExcludedFromFees(address account) public view returns (bool) {
          return _isExcludedFromFees[account];
      }
  
      function _update(address from, address to, uint256 amount) internal override {
          if (amount == 0) {
              super._update(from, to, 0);
              return;
          }
  
          if (from != owner() && to != owner() && to != address(0) && to != address(0x1) && !isSwapping) {
              if (!started) {
                  require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading has not started.");
              }
              if (from == pair && !_isExcludedMaxTransactionAmount[to]) {
                  require(amount <= maxTransaction, "Buying more than the maxTransactionAmount.");
                  require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
              }
              else if (to == pair && !_isExcludedMaxTransactionAmount[from]) {
                  require(amount <= maxTransaction, "Selling more than the maxTransactionAmount.");
              }
              else if (!_isExcludedMaxTransactionAmount[to]) {
                  require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
              }
          }
  
          uint256 contractTokenBalance = balanceOf(address(this));
          bool canSwap = contractTokenBalance > swapThreshold;
          if (started && canSwap && !isSwapping && from != pair && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
              isSwapping = true;
              swapBack();
              isSwapping = false;
          }
  
          bool takeFee = !isSwapping && !_isExcludedFromFees[from] && !_isExcludedFromFees[to];
  
          uint256 fees = 0;
          if (takeFee) {
              if (to == pair) {
                  fees = amount * sellFee / 100;
              }
              else if(from == pair) {
                  fees = amount * buyFee / 100;
              }
              if (fees > 0) {
                  super._update(from, address(this), fees);
              }
              amount -= fees;
          }
          super._update(from, to, amount);
      }
  
      function swapTokensForEth(uint256 tokenAmount) private {
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = router.WETH();
          _approve(address(this), address(router), tokenAmount);
          router.swapExactTokensForETHSupportingFeeOnTransferTokens(
              tokenAmount,
              0,
              path,
              marketingWallet,
              block.timestamp
          );
      }
  
      function swapBack() private {
          uint256 contractBalance = balanceOf(address(this));
          if (contractBalance == 0) {
              return;
          }
  
          uint256 tokensToSwap = contractBalance;
          if (tokensToSwap > maxSwap) {
              tokensToSwap = maxSwap;
          }
          swapTokensForEth(tokensToSwap);
      }
  }