creation_sourcecode: /**
  */
  
  // Sources flattened with hardhat v2.19.1 https://hardhat.org
  
  // SPDX-License-Identifier: MIT
  
  // File @openzeppelin/contracts/utils/Context.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
  
  // http://www.fractalcoin.finance/
  
  // https://t.me/fractalfinanceeth
  
  // https://twitter.com/fractalerc20
  
  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;
      }
  }
  
  // File @openzeppelin/contracts/access/Ownable.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
  
  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);
      }
  }
  
  // File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
  
  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://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);
  }
  
  // File @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
  
  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);
  }
  
  // File @openzeppelin/contracts/token/ERC20/ERC20.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)
  
  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://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
   * 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;
              // 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 {}
  }
  
  // File @openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)
  
  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);
      }
  }
  
  // File @openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)
  
  pragma solidity ^0.8.0;
  
  /**
   * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
   * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
   *
   * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
   * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
   * need to send a transaction, and thus is not required to hold Ether at all.
   */
  interface IERC20Permit {
      /**
       * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
       * given ``owner``'s signed approval.
       *
       * IMPORTANT: The same issues {IERC20-approve} has related to transaction
       * ordering also apply here.
       *
       * Emits an {Approval} event.
       *
       * Requirements:
       *
       * - `spender` cannot be the zero address.
       * - `deadline` must be a timestamp in the future.
       * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
       * over the EIP712-formatted function arguments.
       * - the signature must use ``owner``'s current nonce (see {nonces}).
       *
       * For more information on the signature format, see the
       * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
       * section].
       */
      function permit(
          address owner,
          address spender,
          uint256 value,
          uint256 deadline,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external;
  
      /**
       * @dev Returns the current nonce for `owner`. This value must be
       * included whenever a signature is generated for {permit}.
       *
       * Every successful call to {permit} increases ``owner``'s nonce by one. This
       * prevents a signature from being used multiple times.
       */
      function nonces(address owner) external view returns (uint256);
  
      /**
       * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
       */
      // solhint-disable-next-line func-name-mixedcase
      function DOMAIN_SEPARATOR() external view returns (bytes32);
  }
  
  // File @openzeppelin/contracts/utils/Address.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
  
  pragma solidity ^0.8.1;
  
  /**
   * @dev Collection of functions related to the address type
   */
  library Address {
      /**
       * @dev Returns true if `account` is a contract.
       *
       * [IMPORTANT]
       * ====
       * It is unsafe to assume that an address for which this function returns
       * false is an externally-owned account (EOA) and not a contract.
       *
       * Among others, `isContract` will return false for the following
       * types of addresses:
       *
       *  - an externally-owned account
       *  - a contract in construction
       *  - an address where a contract will be created
       *  - an address where a contract lived, but was destroyed
       *
       * Furthermore, `isContract` will also return true if the target contract within
       * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
       * which only has an effect at the end of a transaction.
       * ====
       *
       * [IMPORTANT]
       * ====
       * You shouldn't rely on `isContract` to protect against flash loan attacks!
       *
       * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
       * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
       * constructor.
       * ====
       */
      function isContract(address account) internal view returns (bool) {
          // This method relies on extcodesize/address.code.length, which returns 0
          // for contracts in construction, since the code is only stored at the end
          // of the constructor execution.
  
          return account.code.length > 0;
      }
  
      /**
       * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
       * `recipient`, forwarding all available gas and reverting on errors.
       *
       * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
       * of certain opcodes, possibly making contracts go over the 2300 gas limit
       * imposed by `transfer`, making them unable to receive funds via
       * `transfer`. {sendValue} removes this limitation.
       *
       * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
       *
       * IMPORTANT: because control is transferred to `recipient`, care must be
       * taken to not create reentrancy vulnerabilities. Consider using
       * {ReentrancyGuard} or the
       * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
       */
      function sendValue(address payable recipient, uint256 amount) internal {
          require(
              address(this).balance >= amount,
              "Address: insufficient balance"
          );
  
          (bool success, ) = recipient.call{value: amount}("");
          require(
              success,
              "Address: unable to send value, recipient may have reverted"
          );
      }
  
      /**
       * @dev Performs a Solidity function call using a low level `call`. A
       * plain `call` is an unsafe replacement for a function call: use this
       * function instead.
       *
       * If `target` reverts with a revert reason, it is bubbled up by this
       * function (like regular Solidity function calls).
       *
       * Returns the raw returned data. To convert to the expected return value,
       * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
       *
       * Requirements:
       *
       * - `target` must be a contract.
       * - calling `target` with `data` must not revert.
       *
       * _Available since v3.1._
       */
      function functionCall(
          address target,
          bytes memory data
      ) internal returns (bytes memory) {
          return
              functionCallWithValue(
                  target,
                  data,
                  0,
                  "Address: low-level call failed"
              );
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
       * `errorMessage` as a fallback revert reason when `target` reverts.
       *
       * _Available since v3.1._
       */
      function functionCall(
          address target,
          bytes memory data,
          string memory errorMessage
      ) internal returns (bytes memory) {
          return functionCallWithValue(target, data, 0, errorMessage);
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but also transferring `value` wei to `target`.
       *
       * Requirements:
       *
       * - the calling contract must have an ETH balance of at least `value`.
       * - the called Solidity function must be `payable`.
       *
       * _Available since v3.1._
       */
      function functionCallWithValue(
          address target,
          bytes memory data,
          uint256 value
      ) internal returns (bytes memory) {
          return
              functionCallWithValue(
                  target,
                  data,
                  value,
                  "Address: low-level call with value failed"
              );
      }
  
      /**
       * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
       * with `errorMessage` as a fallback revert reason when `target` reverts.
       *
       * _Available since v3.1._
       */
      function functionCallWithValue(
          address target,
          bytes memory data,
          uint256 value,
          string memory errorMessage
      ) internal returns (bytes memory) {
          require(
              address(this).balance >= value,
              "Address: insufficient balance for call"
          );
          (bool success, bytes memory returndata) = target.call{value: value}(
              data
          );
          return
              verifyCallResultFromTarget(
                  target,
                  success,
                  returndata,
                  errorMessage
              );
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but performing a static call.
       *
       * _Available since v3.3._
       */
      function functionStaticCall(
          address target,
          bytes memory data
      ) internal view returns (bytes memory) {
          return
              functionStaticCall(
                  target,
                  data,
                  "Address: low-level static call failed"
              );
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
       * but performing a static call.
       *
       * _Available since v3.3._
       */
      function functionStaticCall(
          address target,
          bytes memory data,
          string memory errorMessage
      ) internal view returns (bytes memory) {
          (bool success, bytes memory returndata) = target.staticcall(data);
          return
              verifyCallResultFromTarget(
                  target,
                  success,
                  returndata,
                  errorMessage
              );
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but performing a delegate call.
       *
       * _Available since v3.4._
       */
      function functionDelegateCall(
          address target,
          bytes memory data
      ) internal returns (bytes memory) {
          return
              functionDelegateCall(
                  target,
                  data,
                  "Address: low-level delegate call failed"
              );
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
       * but performing a delegate call.
       *
       * _Available since v3.4._
       */
      function functionDelegateCall(
          address target,
          bytes memory data,
          string memory errorMessage
      ) internal returns (bytes memory) {
          (bool success, bytes memory returndata) = target.delegatecall(data);
          return
              verifyCallResultFromTarget(
                  target,
                  success,
                  returndata,
                  errorMessage
              );
      }
  
      /**
       * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
       * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
       *
       * _Available since v4.8._
       */
      function verifyCallResultFromTarget(
          address target,
          bool success,
          bytes memory returndata,
          string memory errorMessage
      ) internal view returns (bytes memory) {
          if (success) {
              if (returndata.length == 0) {
                  // only check isContract if the call was successful and the return data is empty
                  // otherwise we already know that it was a contract
                  require(isContract(target), "Address: call to non-contract");
              }
              return returndata;
          } else {
              _revert(returndata, errorMessage);
          }
      }
  
      /**
       * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
       * revert reason or using the provided one.
       *
       * _Available since v4.3._
       */
      function verifyCallResult(
          bool success,
          bytes memory returndata,
          string memory errorMessage
      ) internal pure returns (bytes memory) {
          if (success) {
              return returndata;
          } else {
              _revert(returndata, errorMessage);
          }
      }
  
      function _revert(
          bytes memory returndata,
          string memory errorMessage
      ) private pure {
          // Look for revert reason and bubble it up if present
          if (returndata.length > 0) {
              // The easiest way to bubble the revert reason is using memory via assembly
              /// @solidity memory-safe-assembly
              assembly {
                  let returndata_size := mload(returndata)
                  revert(add(32, returndata), returndata_size)
              }
          } else {
              revert(errorMessage);
          }
      }
  }
  
  // File @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol@v4.9.3
  
  // Original license: SPDX_License_Identifier: MIT
  // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)
  
  pragma solidity ^0.8.0;
  
  /**
   * @title SafeERC20
   * @dev Wrappers around ERC20 operations that throw on failure (when the token
   * contract returns false). Tokens that return no value (and instead revert or
   * throw on failure) are also supported, non-reverting calls are assumed to be
   * successful.
   * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
   * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
   */
  library SafeERC20 {
      using Address for address;
  
      /**
       * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
       * non-reverting calls are assumed to be successful.
       */
      function safeTransfer(IERC20 token, address to, uint256 value) internal {
          _callOptionalReturn(
              token,
              abi.encodeWithSelector(token.transfer.selector, to, value)
          );
      }
  
      /**
       * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
       * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
       */
      function safeTransferFrom(
          IERC20 token,
          address from,
          address to,
          uint256 value
      ) internal {
          _callOptionalReturn(
              token,
              abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
          );
      }
  
      /**
       * @dev Deprecated. This function has issues similar to the ones found in
       * {IERC20-approve}, and its usage is discouraged.
       *
       * Whenever possible, use {safeIncreaseAllowance} and
       * {safeDecreaseAllowance} instead.
       */
      function safeApprove(
          IERC20 token,
          address spender,
          uint256 value
      ) internal {
          // safeApprove should only be called when setting an initial allowance,
          // or when resetting it to zero. To increase and decrease it, use
          // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
          require(
              (value == 0) || (token.allowance(address(this), spender) == 0),
              "SafeERC20: approve from non-zero to non-zero allowance"
          );
          _callOptionalReturn(
              token,
              abi.encodeWithSelector(token.approve.selector, spender, value)
          );
      }
  
      /**
       * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
       * non-reverting calls are assumed to be successful.
       */
      function safeIncreaseAllowance(
          IERC20 token,
          address spender,
          uint256 value
      ) internal {
          uint256 oldAllowance = token.allowance(address(this), spender);
          _callOptionalReturn(
              token,
              abi.encodeWithSelector(
                  token.approve.selector,
                  spender,
                  oldAllowance + value
              )
          );
      }
  
      /**
       * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
       * non-reverting calls are assumed to be successful.
       */
      function safeDecreaseAllowance(
          IERC20 token,
          address spender,
          uint256 value
      ) internal {
          unchecked {
              uint256 oldAllowance = token.allowance(address(this), spender);
              require(
                  oldAllowance >= value,
                  "SafeERC20: decreased allowance below zero"
              );
              _callOptionalReturn(
                  token,
                  abi.encodeWithSelector(
                      token.approve.selector,
                      spender,
                      oldAllowance - value
                  )
              );
          }
      }
  
      /**
       * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
       * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
       * to be set to zero before setting it to a non-zero value, such as USDT.
       */
      function forceApprove(
          IERC20 token,
          address spender,
          uint256 value
      ) internal {
          bytes memory approvalCall = abi.encodeWithSelector(
              token.approve.selector,
              spender,
              value
          );
  
          if (!_callOptionalReturnBool(token, approvalCall)) {
              _callOptionalReturn(
                  token,
                  abi.encodeWithSelector(token.approve.selector, spender, 0)
              );
              _callOptionalReturn(token, approvalCall);
          }
      }
  
      /**
       * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
       * Revert on invalid signature.
       */
      function safePermit(
          IERC20Permit token,
          address owner,
          address spender,
          uint256 value,
          uint256 deadline,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) internal {
          uint256 nonceBefore = token.nonces(owner);
          token.permit(owner, spender, value, deadline, v, r, s);
          uint256 nonceAfter = token.nonces(owner);
          require(
              nonceAfter == nonceBefore + 1,
              "SafeERC20: permit did not succeed"
          );
      }
  
      /**
       * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
       * on the return value: the return value is optional (but if data is returned, it must not be false).
       * @param token The token targeted by the call.
       * @param data The call data (encoded using abi.encode or one of its variants).
       */
      function _callOptionalReturn(IERC20 token, bytes memory data) private {
          // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
          // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
          // the target address contains contract code and also asserts for success in the low-level call.
  
          bytes memory returndata = address(token).functionCall(
              data,
              "SafeERC20: low-level call failed"
          );
          require(
              returndata.length == 0 || abi.decode(returndata, (bool)),
              "SafeERC20: ERC20 operation did not succeed"
          );
      }
  
      /**
       * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
       * on the return value: the return value is optional (but if data is returned, it must not be false).
       * @param token The token targeted by the call.
       * @param data The call data (encoded using abi.encode or one of its variants).
       *
       * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
       */
      function _callOptionalReturnBool(
          IERC20 token,
          bytes memory data
      ) private returns (bool) {
          // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
          // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
          // and not revert is the subcall reverts.
  
          (bool success, bytes memory returndata) = address(token).call(data);
          return
              success &&
              (returndata.length == 0 || abi.decode(returndata, (bool))) &&
              Address.isContract(address(token));
      }
  }
  
  // File contracts/token/AntiBotHelper.sol
  
  // Original license: SPDX_License_Identifier: MIT
  
  pragma solidity ^0.8.0;
  
  /**
   * @notice Anti-Bot Helper
   * Max TX Amount feature
   * Max Wallet Amount feature
   */
  abstract contract AntiBotHelper is Ownable {
      /// @dev Minimum value that can be set for the max transaction limit - 0.25%
      uint16 private constant MIN__MAX_TX_LIMIT = 25;
      /// @dev Maximum value that can be set for the max transaction limit - 100%
      uint16 private constant MAX__MAX_TX_LIMIT = 10000;
      /// @dev Minimum value that can be set for the max hold limit - 0.25%
      uint16 private constant MIN__MAX_HOLD_LIMIT = 25;
      /// @dev Maximum value that can be set for the max hold limit - 100%
      uint16 private constant MAX__MAX_HOLD_LIMIT = 10000;
  
      uint16 internal _maxTxLimit = 200; // default 2%
      uint16 internal _maxHoldLimit = 200; // default 2%
  
      /// @dev trading enabled flag. default false
      bool internal _tradingEnabled;
  
      mapping(address => bool) internal _isExcludedFromTxLimit;
      mapping(address => bool) internal _isExcludedFromHoldLimit;
  
      event ExcludedFromHoldLimit(address account, bool flag);
      event ExcludedFromTxLimit(address account, bool flag);
      event MaxLimitUpdated(uint16 maxHoldLimit, uint16 maxTxLimit);
      event TradingEnabled();
  
      /// @notice Exclude / Include the multiple accounts from max tx limit
      /// @dev Only callable by owner
      function batchExcludeFromTxLimit(
          address[] calldata accounts,
          bool flag
      ) external onlyOwner {
          uint256 len = accounts.length;
          for (uint256 i; i < len; ) {
              address account = accounts[i];
              _isExcludedFromTxLimit[account] = flag;
  
              unchecked {
                  ++i;
              }
  
              emit ExcludedFromTxLimit(account, flag);
          }
      }
  
      /// @notice Exclude / Include the multiple accounts from max wallet limit
      /// @dev Only callable by owner
      function batchExcludeFromHoldLimit(
          address[] calldata accounts,
          bool flag
      ) external onlyOwner {
          uint256 len = accounts.length;
          for (uint256 i; i < len; ) {
              address account = accounts[i];
              _isExcludedFromHoldLimit[account] = flag;
  
              unchecked {
                  ++i;
              }
  
              emit ExcludedFromHoldLimit(account, flag);
          }
      }
  
      /// @notice Check if the account is excluded from max hold & wallet limit
      /// @return bool excluded from max hold limit
      /// @return bool excluded from max tx limit
      function isExcludedFromLimit(
          address account
      ) external view returns (bool, bool) {
          return (
              _isExcludedFromHoldLimit[account],
              _isExcludedFromTxLimit[account]
          );
      }
  
      /// @notice Update max hold limit & max tx limit
      /// @param holdLimit new max hold limit
      /// @param txLimit new max tx limit
      function updateMaxLimit(
          uint16 holdLimit,
          uint16 txLimit
      ) external onlyOwner {
          require(holdLimit >= txLimit, "tx limit exceeds hold limit");
          require(
              _maxHoldLimit <= holdLimit && _maxTxLimit <= txLimit,
              "increase only"
          );
          require(txLimit <= MAX__MAX_TX_LIMIT, "tx limit out of range");
          require(holdLimit <= MAX__MAX_HOLD_LIMIT, "hold limit out of range");
  
          _maxHoldLimit = holdLimit;
          _maxTxLimit = txLimit;
  
          emit MaxLimitUpdated(holdLimit, txLimit);
      }
  
      /// @notice View max hold limit & max tx limit
      /// @return uint16 max hold limit percent
      /// @return uint16 max tx limit percent
      function maxLimit() external view returns (uint16, uint16) {
          return (_maxHoldLimit, _maxTxLimit);
      }
  
      /// @notice Enable trading
      function enableTrading() external onlyOwner {
          require(!_tradingEnabled, "already enabled");
          _tradingEnabled = true;
  
          emit TradingEnabled();
      }
  
      /// @notice Check if the trading is enabled now
      function isTradingEnabled() external view returns (bool) {
          return _tradingEnabled;
      }
  }
  
  // File contracts/interfaces/IUniswapAmm.sol
  
  // Original license: SPDX_License_Identifier: MIT
  
  // File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol
  
  pragma solidity ^0.8.4;
  
  interface IUniswapV2Factory {
      event PairCreated(
          address indexed token0,
          address indexed token1,
          address pair,
          uint256
      );
  
      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(uint256) external view returns (address pair);
  
      function allPairsLength() external view returns (uint256);
  
      function createPair(
          address tokenA,
          address tokenB
      ) external returns (address pair);
  
      function setFeeTo(address) external;
  
      function setFeeToSetter(address) external;
  }
  
  // File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol
  
  interface IUniswapV2Pair {
      event Approval(
          address indexed owner,
          address indexed spender,
          uint256 value
      );
      event Transfer(address indexed from, address indexed to, uint256 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 (uint256);
  
      function balanceOf(address owner) external view returns (uint256);
  
      function allowance(
          address owner,
          address spender
      ) external view returns (uint256);
  
      function approve(address spender, uint256 value) external returns (bool);
  
      function transfer(address to, uint256 value) external returns (bool);
  
      function transferFrom(
          address from,
          address to,
          uint256 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 (uint256);
  
      function permit(
          address owner,
          address spender,
          uint256 value,
          uint256 deadline,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external;
  
      event Mint(address indexed sender, uint256 amount0, uint256 amount1);
      event Burn(
          address indexed sender,
          uint256 amount0,
          uint256 amount1,
          address indexed to
      );
      event Swap(
          address indexed sender,
          uint256 amount0In,
          uint256 amount1In,
          uint256 amount0Out,
          uint256 amount1Out,
          address indexed to
      );
      event Sync(uint112 reserve0, uint112 reserve1);
  
      function MINIMUM_LIQUIDITY() external pure returns (uint256);
  
      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 (uint256);
  
      function price1CumulativeLast() external view returns (uint256);
  
      function kLast() external view returns (uint256);
  
      function mint(address to) external returns (uint256 liquidity);
  
      function burn(
          address to
      ) external returns (uint256 amount0, uint256 amount1);
  
      function swap(
          uint256 amount0Out,
          uint256 amount1Out,
          address to,
          bytes calldata data
      ) external;
  
      function skim(address to) external;
  
      function sync() external;
  
      function initialize(address, address) external;
  }
  
  // File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol
  
  interface IUniswapV2Router01 {
      function factory() external pure returns (address);
  
      function WETH() external pure returns (address);
  
      function addLiquidity(
          address tokenA,
          address tokenB,
          uint256 amountADesired,
          uint256 amountBDesired,
          uint256 amountAMin,
          uint256 amountBMin,
          address to,
          uint256 deadline
      ) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);
  
      function addLiquidityETH(
          address token,
          uint256 amountTokenDesired,
          uint256 amountTokenMin,
          uint256 amountETHMin,
          address to,
          uint256 deadline
      )
          external
          payable
          returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
  
      function removeLiquidity(
          address tokenA,
          address tokenB,
          uint256 liquidity,
          uint256 amountAMin,
          uint256 amountBMin,
          address to,
          uint256 deadline
      ) external returns (uint256 amountA, uint256 amountB);
  
      function removeLiquidityETH(
          address token,
          uint256 liquidity,
          uint256 amountTokenMin,
          uint256 amountETHMin,
          address to,
          uint256 deadline
      ) external returns (uint256 amountToken, uint256 amountETH);
  
      function removeLiquidityWithPermit(
          address tokenA,
          address tokenB,
          uint256 liquidity,
          uint256 amountAMin,
          uint256 amountBMin,
          address to,
          uint256 deadline,
          bool approveMax,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external returns (uint256 amountA, uint256 amountB);
  
      function removeLiquidityETHWithPermit(
          address token,
          uint256 liquidity,
          uint256 amountTokenMin,
          uint256 amountETHMin,
          address to,
          uint256 deadline,
          bool approveMax,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external returns (uint256 amountToken, uint256 amountETH);
  
      function swapExactTokensForTokens(
          uint256 amountIn,
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external returns (uint256[] memory amounts);
  
      function swapTokensForExactTokens(
          uint256 amountOut,
          uint256 amountInMax,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external returns (uint256[] memory amounts);
  
      function swapExactETHForTokens(
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external payable returns (uint256[] memory amounts);
  
      function swapTokensForExactETH(
          uint256 amountOut,
          uint256 amountInMax,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external returns (uint256[] memory amounts);
  
      function swapExactTokensForETH(
          uint256 amountIn,
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external returns (uint256[] memory amounts);
  
      function swapETHForExactTokens(
          uint256 amountOut,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external payable returns (uint256[] memory amounts);
  
      function quote(
          uint256 amountA,
          uint256 reserveA,
          uint256 reserveB
      ) external pure returns (uint256 amountB);
  
      function getAmountOut(
          uint256 amountIn,
          uint256 reserveIn,
          uint256 reserveOut
      ) external pure returns (uint256 amountOut);
  
      function getAmountIn(
          uint256 amountOut,
          uint256 reserveIn,
          uint256 reserveOut
      ) external pure returns (uint256 amountIn);
  
      function getAmountsOut(
          uint256 amountIn,
          address[] calldata path
      ) external view returns (uint256[] memory amounts);
  
      function getAmountsIn(
          uint256 amountOut,
          address[] calldata path
      ) external view returns (uint256[] memory amounts);
  }
  
  // File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol
  
  interface IUniswapV2Router02 is IUniswapV2Router01 {
      function removeLiquidityETHSupportingFeeOnTransferTokens(
          address token,
          uint256 liquidity,
          uint256 amountTokenMin,
          uint256 amountETHMin,
          address to,
          uint256 deadline
      ) external returns (uint256 amountETH);
  
      function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
          address token,
          uint256 liquidity,
          uint256 amountTokenMin,
          uint256 amountETHMin,
          address to,
          uint256 deadline,
          bool approveMax,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external returns (uint256 amountETH);
  
      function swapExactTokensForTokensSupportingFeeOnTransferTokens(
          uint256 amountIn,
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external;
  
      function swapExactETHForTokensSupportingFeeOnTransferTokens(
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external payable;
  
      function swapExactTokensForETHSupportingFeeOnTransferTokens(
          uint256 amountIn,
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external;
  }
  
  // File contracts/token/TaxHelper.sol
  
  // Original license: SPDX_License_Identifier: MIT
  
  pragma solidity ^0.8.0;
  
  /**
   * @notice Tax Helper
   * Marketing fee
   * Burn fee
   * Fee in buy/sell/transfer separately
   */
  abstract contract TaxHelper is Ownable {
      /// @dev Max buy tax after token launched. 10%
      uint16 private constant MAX_BUY_TAX_AFTER = 1000;
      /// @dev Max sell tax after token launched. 10%
      uint16 private constant MAX_SELL_TAX_AFTER = 1000;
      /// @dev Project tax is set on top buy / sell tax as a service fee. 15%
      uint16 internal constant PROJECT_TAX = 1500;
      /// @dev Project tax is removed after 30 days
      uint256 internal constant PROJECT_TAX_PERIOD = 30 days;
      /// @dev Project tax receive wallet
      address payable internal constant PROJECT_WALLET =
          payable(0xcd443a0950f1842c7BE8A6c31FCEBf2FF22EbEdc);
  
      bool internal _projectTaxApplied = true;
  
      /// @dev Buy tax default 25%
      uint16 internal _buyTax = 2500;
      /// @dev Sell tax default 25%
      uint16 internal _sellTax = 2500;
  
      address payable internal _marketingWallet;
  
      mapping(address => bool) internal _isExcludedFromTax;
      mapping(address => bool) internal _isAmmPair;
  
      event ExcludedFromTax(address account, bool flag);
      event MarketingWalletUpdated(address marketingWallet);
      event NewAmmPair(address pair, bool flag);
      event TaxesUpdated(uint16 buyTax, uint16 sellTax);
  
      /// @notice Update buy / sell / treasury tax
      /// @dev new tax values should not be greater than the `taxAfterLimit`
      /// @param buyTax new buy tax value
      /// @param sellTax new sell tax value
      function updateTaxes(uint16 buyTax, uint16 sellTax) external onlyOwner {
          // gas-saving code
          uint16 buyTax_ = _buyTax;
          uint16 sellTax_ = _sellTax;
  
          if (buyTax > buyTax_)
              require(buyTax <= MAX_BUY_TAX_AFTER, "invalid buyTax");
          if (sellTax > sellTax_)
              require(sellTax <= MAX_SELL_TAX_AFTER, "invalid sellTax");
  
          _buyTax = buyTax;
          _sellTax = sellTax;
  
          emit TaxesUpdated(buyTax, sellTax);
      }
  
      /// @notice View taxes applied to the token
      /// @return uint16 {_buyTax}
      /// @return uint16 {_sellTax}
      function taxes() external view returns (uint16, uint16) {
          return (_buyTax, _sellTax);
      }
  
      /// @notice Update marketing wallet
      function updateMarketingWallet(
          address payable newWallet
      ) external onlyOwner {
          require(_marketingWallet != newWallet, "nothing changed");
          require(newWallet != address(0), "invalid wallet");
  
          _marketingWallet = newWallet;
  
          emit MarketingWalletUpdated(newWallet);
      }
  
      /// @notice View current marketing wallet
      function marketingWallet() external view returns (address payable) {
          return _marketingWallet;
      }
  
      /// @notice Exclude / Include the multiple accounts from tax
      /// @dev Only callable by owner
      function batchExcludeFromTax(
          address[] calldata accounts,
          bool flag
      ) external onlyOwner {
          uint256 len = accounts.length;
          for (uint256 i; i < len; ) {
              address account = accounts[i];
              _isExcludedFromTax[account] = flag;
  
              unchecked {
                  ++i;
              }
  
              emit ExcludedFromTax(account, flag);
          }
      }
  
      /// @notice Check if the account is excluded from the fees
      /// @param account: the account to be checked
      function isExcludedFromTax(address account) external view returns (bool) {
          return _isExcludedFromTax[account];
      }
  
      /// @notice Check if the {pair} is AMM pair
      function isAmmPair(address pair) external view returns (bool) {
          return _isAmmPair[pair];
      }
  
      /**
       * @dev function {taxLimits}
       *
       * Return tax limits compared with current value and taxAfterLimits
       *
       * @return uint16 max buy tax limit
       * @return uint16 max sell tax limit
       */
      function taxLimits() external view returns (uint16, uint16) {
          uint16 maxBuyTax = _buyTax < MAX_BUY_TAX_AFTER
              ? MAX_BUY_TAX_AFTER
              : _buyTax;
          uint16 maxSellTax = _sellTax < MAX_SELL_TAX_AFTER
              ? MAX_SELL_TAX_AFTER
              : _sellTax;
          return (maxBuyTax, maxSellTax);
      }
  }
  
  // File contracts/token/TokenERC20Base.sol
  
  // Original license: SPDX_License_Identifier: MIT
  
  pragma solidity ^0.8.0;
  
  contract TokenERC20Base is AntiBotHelper, TaxHelper, ERC20Burnable {
      using Address for address payable;
  
      uint16 internal constant DENOMINATOR = 10000;
      // default threshold would be 0.25% of the total supply
      uint16 private constant DEFAULT_THRESHOLD = 25;
  
      address public immutable uniswapV2Router;
      address public immutable ethPair;
  
      bool internal _isTaxConvertEnabled = true;
  
      uint256 public firstBuyAt;
  
      /// @dev Threshold amount of accumlated tax until swap to pair token
      uint256 internal _thresholdAmount;
  
      constructor(
          string memory name_,
          string memory symbol_,
          uint256 supply_,
          address router_,
          address payable marketingWallet_
      ) ERC20(name_, symbol_) {
          // check if marketing account can receive ETH
          marketingWallet_.sendValue(0);
  
          // pair with ETH
          address lpPair = IUniswapV2Factory(
              IUniswapV2Router02(router_).factory()
          ).createPair(address(this), IUniswapV2Router02(router_).WETH());
  
          uniswapV2Router = router_;
          ethPair = lpPair;
          _marketingWallet = marketingWallet_;
  
          _isAmmPair[lpPair] = true;
          _isExcludedFromHoldLimit[lpPair] = true;
  
          // threshold amount is 0.05% of the total supply
          _thresholdAmount = (supply_ * DEFAULT_THRESHOLD) / DENOMINATOR;
  
          _isExcludedFromTxLimit[_msgSender()] = true;
          _isExcludedFromTxLimit[address(0)] = true;
          _isExcludedFromTxLimit[address(0xdead)] = true;
          _isExcludedFromTxLimit[address(this)] = true;
  
          _isExcludedFromHoldLimit[_msgSender()] = true;
          _isExcludedFromHoldLimit[address(0)] = true;
          _isExcludedFromHoldLimit[address(0xdead)] = true;
          _isExcludedFromHoldLimit[address(this)] = true;
  
          _isExcludedFromTax[_msgSender()] = true;
          _isExcludedFromTax[address(0)] = true;
          _isExcludedFromTax[address(0xdead)] = true;
          _isExcludedFromTax[address(this)] = true;
  
          // Mint the tokens to the token deployer
          _mint(_msgSender(), supply_);
      }
  
      /**
       * @notice function {batchSetAsAmmPair}
       *
       * Set / unset multiple pair addresses as AMM pair
       * LP addresses should be excluded from hold limit
       *
       * @param pairs lp addresses
       * @param flag true / false
       */
      function batchSetAsAmmPair(
          address[] calldata pairs,
          bool flag
      ) external onlyOwner {
          uint256 len = pairs.length;
  
          for (uint256 i; i < len; ) {
              address pair = pairs[i];
              require(pair != ethPair, "can not access base eth pair");
              _isAmmPair[pair] = flag;
              _isExcludedFromHoldLimit[pair] = flag;
  
              unchecked {
                  ++i;
              }
  
              emit NewAmmPair(pair, flag);
          }
      }
  
      /// @notice Enable conversion of token tax
      function enableTaxConvert(bool flag) external onlyOwner {
          _isTaxConvertEnabled = flag;
      }
  
      function isTaxConvertEnabled() external view returns (bool) {
          return _isTaxConvertEnabled;
      }
  
      /// @notice Update the threshold amount for the swapping to occur
      /// @dev Too small value will cause sell tx happens in every tx
      function updateThresholdAmount(uint256 amount) external onlyOwner {
          require(amount > 0, "invalid threshold");
          _thresholdAmount = amount;
      }
  
      function thresholdAmount() external view returns (uint256) {
          return _thresholdAmount;
      }
  }
  
  // File contracts/token/TokenERC20.sol
  
  // Original license: SPDX_License_Identifier: MIT
  
  pragma solidity ^0.8.0;
  
  contract Fractal is TokenERC20Base {
      using Address for address payable;
      using SafeERC20 for IERC20;
  
      bool private _inSwap;
  
      modifier lockTheSwap() {
          _inSwap = true;
          _;
          _inSwap = false;
      }
  
      constructor(
          address payable marketingWallet_
      )
          TokenERC20Base(
              "Fractal",
              "FTL",
              100_000_000_000 ether,
              0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D,
              marketingWallet_
          )
      {}
  
      /**
       * @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 override {
          uint256 totalSupply_ = totalSupply();
  
          // Check if trading is enabled
          address owner_ = owner();
          require(
              _tradingEnabled || owner_ == from || owner_ == to,
              "trading disabled"
          );
  
          // Check max tx limit
          require(
              _isExcludedFromTxLimit[from] ||
                  _isExcludedFromTxLimit[to] ||
                  amount <= (totalSupply_ * _maxTxLimit) / DENOMINATOR,
              "tx amount limited"
          );
  
          // Check max wallet amount limit
          require(
              _isExcludedFromHoldLimit[to] ||
                  balanceOf(to) <= (totalSupply_ * _maxHoldLimit) / DENOMINATOR,
              "receiver hold limited"
          );
      }
  
      function _transfer(
          address from,
          address to,
          uint256 amount
      ) internal override {
          uint256 blockTime = block.timestamp;
  
          // is the token balance of this contract address over the min number of
          // tokens that we need to initiate a swap + liquidity lock?
          // also, don't get caught in a circular liquidity event.
          // also, don't swap & liquify if sender is uniswap pair.
          uint256 contractTokenBalance = balanceOf(address(this));
  
          bool isWhitelisted = _isExcludedFromTax[from] || _isExcludedFromTax[to];
          bool isBuyTx = _isAmmPair[from];
          bool isSellTx = _isAmmPair[to];
  
          // swap accumlated tax into ETH or USDC
          if (
              !_inSwap &&
              !isWhitelisted &&
              !isBuyTx &&
              _isTaxConvertEnabled &&
              contractTokenBalance >= _thresholdAmount
          ) {
              // although the project tax period is finished, there may still be accumulated taxes thus far.
              // in this case, we will swap all those taxes into ETH.
              bool isProjectTaxOverTime = _projectTaxApplied &&
                  firstBuyAt > 0 &&
                  blockTime > firstBuyAt + PROJECT_TAX_PERIOD;
  
              // when the physicsico fee period is over, swap all accumlated taxes
              if (isProjectTaxOverTime) _swapToPairedToken(contractTokenBalance);
              else _swapToPairedToken(_thresholdAmount);
              if (isProjectTaxOverTime) _projectTaxApplied = false;
          }
  
          if (amount == 0) {
              super._transfer(from, to, 0);
              return;
          }
  
          uint256 fees;
          if (!isWhitelisted) {
              if (isBuyTx) {
                  // project tax is applied on top of buy tax for 30 days
                  // its 15% of buy tax
                  if (firstBuyAt == 0) firstBuyAt = block.timestamp;
                  if (
                      _projectTaxApplied &&
                      blockTime <= firstBuyAt + PROJECT_TAX_PERIOD
                  )
                      fees =
                          (amount * _buyTax * (DENOMINATOR + PROJECT_TAX)) /
                          DENOMINATOR /
                          DENOMINATOR;
                  else fees = (amount * _buyTax) / DENOMINATOR;
              } else if (isSellTx) {
                  // project tax is applied on top of sell tax for 30 days
                  // its 15% of buy tax
                  if (
                      _projectTaxApplied &&
                      (firstBuyAt == 0 ||
                          blockTime <= firstBuyAt + PROJECT_TAX_PERIOD)
                  )
                      fees =
                          (amount * _sellTax * (DENOMINATOR + PROJECT_TAX)) /
                          DENOMINATOR /
                          DENOMINATOR;
                  else fees = (amount * _sellTax) / DENOMINATOR;
              }
  
              if (fees > 0) super._transfer(from, address(this), fees);
              amount -= fees;
          }
  
          super._transfer(from, to, amount);
      }
  
      /**
       * @dev Swap token accumlated in this contract to the base paired token
       * 
       * According to the paired token
  
       * - when paired token is ETH, swapToETH function is called
       * - when paired token is another token, swapToToken is called
  
       */
      function _swapToPairedToken(uint256 amount) private lockTheSwap {
          uint256 swappedAmount = _swapToETH(amount);
          if (swappedAmount > 0) {
              // send project tax
              if (_projectTaxApplied) {
                  uint256 projectTaxAmount = (swappedAmount * PROJECT_TAX) /
                      (DENOMINATOR + PROJECT_TAX);
                  PROJECT_WALLET.sendValue(projectTaxAmount);
                  swappedAmount -= projectTaxAmount;
              }
              // send buy/sell tax
              _marketingWallet.sendValue(swappedAmount);
          }
      }
  
      function _swapToETH(uint256 amount) private returns (uint256) {
          IUniswapV2Router02 dexRouter = IUniswapV2Router02(uniswapV2Router);
          // generate the uniswap pair path of token -> eth
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = dexRouter.WETH();
  
          _approve(address(this), address(dexRouter), amount);
          uint256 balanceBefore = address(this).balance;
          // make the swap
          try
              dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
                  amount,
                  0, // accept any amount of ETH
                  path,
                  address(this),
                  block.timestamp + 300
              )
          {
              return address(this).balance - balanceBefore;
          } catch (bytes memory /* lowLevelData */) {}
          return 0;
      }
  
      receive() external payable {}
  
      /**
       * @dev It allows the admin to recover tokens sent to the contract
       * @param token_: the address of the token to withdraw
       * @param amount_: the number of tokens to withdraw
       *
       * This function is only callable by owner
       */
      function recoverToken(address token_, uint256 amount_) external onlyOwner {
          require(token_ != address(this), "Not allowed token");
          IERC20(token_).safeTransfer(_msgSender(), amount_);
      }
  }