// File: rocketart.sol



/******************************************************

   RocketArt

   $RKT
      
      rocketart.org

      t.me/rocketart


                     *    .--.
                        / /  `
            +            | |
                 '       \ \__,
              *        +   '--'  *
                 +   /\
       +           .'  '.   *
            *     /======\     +
                 ;:.  _   ; R
                 |:. (_)  | K
                 |:.  _   | T
         +       |:. (_)  |        *
                 ;:.     ;
               .' \:.   / `.
               / .-'':._.'`-. \
               |/   /||\   \|
           W3 _..--"""````"""--.._
         _.-'``               ``'-._
       -'                        '-
         
******************************************************/

//  SPDX-License-Identifier: MIT

pragma solidity 0.8.17; 

abstract contract Context {  
   function _msgSender() internal view virtual returns (address) {  
      return msg.sender; 
   }             

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

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 Returns the address of the current owner.
    */
   function owner() public view virtual returns (address) {  
      return _owner; 
   }            

   /**
    * @dev Throws if called by any account other than the owner.
    */
   modifier onlyOwner() {  
      require(owner() == _msgSender(), "Ownable: caller is not the owner"); 
      _; 
   }            

   /**
    * @dev Leaves the contract without owner. It will not be possible to call
    * `onlyOwner` functions anymore. Can only be called by the current owner.
    *
    * NOTE: Renouncing ownership will leave the contract without an owner,
    * thereby removing any functionality that is only available to the owner.
    */
   function renounceOwnership() public virtual onlyOwner {  
      _transferOwnership(address(0)); 
   }            

   /**
    * @dev Transfers ownership of the contract to a new account (`newOwner`).
    * Can only be called by the current owner.
    */
   function transferOwnership(address newOwner) public virtual onlyOwner {  
      require(newOwner != address(0), "Ownable: new owner is the zero address"); 
      _transferOwnership(newOwner); 
   }            

   /**
    * @dev Transfers ownership of the contract to a new account (`newOwner`).
    * Internal function without access restriction.
    */
   function _transferOwnership(address newOwner) internal virtual {  
      address oldOwner = _owner; 
      _owner = newOwner; 
      emit OwnershipTransferred(oldOwner, newOwner); 
   }            
}            

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {  
   /**
    * @dev 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 `recipient`.
    *
    * Returns a boolean value indicating whether the operation succeeded.
    *
    * Emits a {  Transfer}            event.
    */
   function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
      address recipient,
      uint256 amount
   ) external returns (bool); 

   /**
    * @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); 
}            

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); 
}            


contract ERC20 is Context, IERC20, IERC20Metadata {  
   mapping(address => uint256) private _balances; 

   mapping(address => mapping(address => uint256)) private _allowances; 

   uint256 private _totalSupply; 

   string private _name; 
   string private _symbol; 

   /**
    * @dev Sets the values for {  name}            and {  symbol}            .
    *
    * The default value of {  decimals}            is 18. To select a different value for
    * {  decimals}            you should overload it.
    *
    * All two of these values are immutable: they can only be set once during
    * construction.
    */
   constructor(string memory name_, string memory symbol_) {  
      _name = name_; 
      _symbol = symbol_; 
   }            

   /**
    * @dev Returns the name of the token.
    */
   function name() public view virtual override returns (string memory) {  
      return _name; 
   }            

   /**
    * @dev Returns the symbol of the token, usually a shorter version of the
    * name.
    */
   function symbol() public view virtual override returns (string memory) {  
      return _symbol; 
   }            

   /**
    * @dev Returns the number of decimals used to get its user representation.
    * For example, if `decimals` equals `2`, a balance of `505` tokens should
    * be displayed to a user as `5.05` (`505 / 10 ** 2`).
    *
    * Tokens usually opt for a value of 18, imitating the relationship between
    * Ether and Wei. This is the value {  ERC20}            uses, unless this function is
    * overridden; 
    *
    * NOTE: This information is only used for _display_ purposes: it in
    * no way affects any of the arithmetic of the contract, including
    * {  IERC20-balanceOf}            and {  IERC20-transfer}            .
    */
   function decimals() public view virtual override returns (uint8) {  
      return 18; 
   }            

   /**
    * @dev See {  IERC20-totalSupply}            .
    */
   function totalSupply() public view virtual override returns (uint256) {  
      return _totalSupply; 
   }            

   /**
    * @dev See {  IERC20-balanceOf}            .
    */
   function balanceOf(address account) public view virtual override returns (uint256) {  
      return _balances[account]; 
   }            

   /**
    * @dev See {  IERC20-transfer}            .
    *
    * Requirements:
    *
    * - `recipient` cannot be the zero address.
    * - the caller must have a balance of at least `amount`.
    */
   function transfer(address recipient, uint256 amount) public virtual override returns (bool) {  
      _transfer(_msgSender(), recipient, 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}            .
    *
    * Requirements:
    *
    * - `spender` cannot be the zero address.
    */
   function approve(address spender, uint256 amount) public virtual override returns (bool) {  
      _approve(_msgSender(), 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}            .
    *
    * Requirements:
    *
    * - `sender` and `recipient` cannot be the zero address.
    * - `sender` must have a balance of at least `amount`.
    * - the caller must have allowance for ``sender``'s tokens of at least
    * `amount`.
    */
   function transferFrom(
      address sender,
      address recipient,
      uint256 amount
   ) public virtual override returns (bool) {  
      _transfer(sender, recipient, amount); 

      uint256 currentAllowance = _allowances[sender][_msgSender()]; 
      require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); 
      unchecked {  
         _approve(sender, _msgSender(), currentAllowance - 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) {  
      _approve(_msgSender(), spender, _allowances[_msgSender()][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) {  
      uint256 currentAllowance = _allowances[_msgSender()][spender]; 
      require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); 
      unchecked {  
         _approve(_msgSender(), spender, currentAllowance - subtractedValue); 
      }            

      return true; 
   }            

   /**
    * @dev Moves `amount` of tokens from `sender` to `recipient`.
    *
    * 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:
    *
    * - `sender` cannot be the zero address.
    * - `recipient` cannot be the zero address.
    * - `sender` must have a balance of at least `amount`.
    */
   function _transfer(
      address sender,
      address recipient,
      uint256 amount
   ) internal virtual {  
      require(sender != address(0), "ERC20: transfer from the zero address"); 
      require(recipient != address(0), "ERC20: transfer to the zero address"); 

      _beforeTokenTransfer(sender, recipient, amount); 

      uint256 senderBalance = _balances[sender]; 
      require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); 
      unchecked {  
         _balances[sender] = senderBalance - amount; 
      }            
      _balances[recipient] += amount; 

      emit Transfer(sender, recipient, amount); 

      _afterTokenTransfer(sender, recipient, 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; 
      _balances[account] += amount; 
      emit Transfer(address(0), account, amount); 

      _afterTokenTransfer(address(0), account, amount); 
   }            

   /**
    * @dev Destroys `amount` tokens from `account`, reducing the
    * total supply.
    *
    * Emits a {  Transfer}            event with `to` set to the zero address.
    *
    * Requirements:
    *
    * - `account` cannot be the zero address.
    * - `account` must have at least `amount` tokens.
    */
   function _burn(address account, uint256 amount) internal virtual {  
      require(account != address(0), "ERC20: burn from the zero address"); 

      _beforeTokenTransfer(account, address(0), amount); 

      uint256 accountBalance = _balances[account]; 
      require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); 
      unchecked {  
         _balances[account] = accountBalance - amount; 
      }            
      _totalSupply -= amount; 

      emit Transfer(account, address(0), amount); 

      _afterTokenTransfer(account, address(0), amount); 
   }            

   /**
    * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
    *
    * This internal function is equivalent to `approve`, and can be used to
    * e.g. set automatic allowances for certain subsystems, etc.
    *
    * Emits an {  Approval}            event.
    *
    * Requirements:
    *
    * - `owner` cannot be the zero address.
    * - `spender` cannot be the zero address.
    */
   function _approve(
      address owner,
      address spender,
      uint256 amount
   ) internal virtual {  
      require(owner != address(0), "ERC20: approve from the zero address"); 
      require(spender != address(0), "ERC20: approve to the zero address"); 

      _allowances[owner][spender] = amount; 
      emit Approval(owner, spender, amount); 
   }            

   /**
    * @dev 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 {  }            
}            


library SafeMath {  
   /**
    * @dev Returns the addition of two unsigned integers, with an overflow flag.
    *
    * _Available since v3.4._
    */
   function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {  
      unchecked {  
         uint256 c = a + b; 
         if (c < a) return (false, 0); 
         return (true, c); 
      }            
   }            

   /**
    * @dev Returns the substraction of two unsigned integers, with an overflow flag.
    *
    * _Available since v3.4._
    */
   function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {  
      unchecked {  
         if (b > a) return (false, 0); 
         return (true, a - b); 
      }            
   }            

   /**
    * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
    *
    * _Available since v3.4._
    */
   function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {  
      unchecked {  
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https:// github.com/OpenZeppelin/openzeppelin-contracts/pull/522
         if (a == 0) return (true, 0); 
         uint256 c = a * b; 
         if (c / a != b) return (false, 0); 
         return (true, c); 
      }            
   }            

   /**
    * @dev Returns the division of two unsigned integers, with a division by zero flag.
    *
    * _Available since v3.4._
    */
   function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {  
      unchecked {  
         if (b == 0) return (false, 0); 
         return (true, a / b); 
      }            
   }            

   /**
    * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
    *
    * _Available since v3.4._
    */
   function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {  
      unchecked {  
         if (b == 0) return (false, 0); 
         return (true, a % b); 
      }            
   }            

   /**
    * @dev Returns the addition of two unsigned integers, reverting on
    * overflow.
    *
    * Counterpart to Solidity's `+` operator.
    *
    * Requirements:
    *
    * - Addition cannot overflow.
    */
   function add(uint256 a, uint256 b) internal pure returns (uint256) {  
      return a + b; 
   }            

   /**
    * @dev Returns the subtraction of two unsigned integers, reverting on
    * overflow (when the result is negative).
    *
    * Counterpart to Solidity's `-` operator.
    *
    * Requirements:
    *
    * - Subtraction cannot overflow.
    */
   function sub(uint256 a, uint256 b) internal pure returns (uint256) {  
      return a - b; 
   }            

   /**
    * @dev Returns the multiplication of two unsigned integers, reverting on
    * overflow.
    *
    * Counterpart to Solidity's `*` operator.
    *
    * Requirements:
    *
    * - Multiplication cannot overflow.
    */
   function mul(uint256 a, uint256 b) internal pure returns (uint256) {  
      return a * b; 
   }            

   /**
    * @dev Returns the integer division of two unsigned integers, reverting on
    * division by zero. The result is rounded towards zero.
    *
    * Counterpart to Solidity's `/` operator.
    *
    * Requirements:
    *
    * - The divisor cannot be zero.
    */
   function div(uint256 a, uint256 b) internal pure returns (uint256) {  
      return a / b; 
   }            

   /**
    * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
    * reverting when dividing by zero.
    *
    * Counterpart to Solidity's `%` operator. This function uses a `revert`
    * opcode (which leaves remaining gas untouched) while Solidity uses an
    * invalid opcode to revert (consuming all remaining gas).
    *
    * Requirements:
    *
    * - The divisor cannot be zero.
    */
   function mod(uint256 a, uint256 b) internal pure returns (uint256) {  
      return a % b; 
   }            

   /**
    * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
    * overflow (when the result is negative).
    *
    * CAUTION: This function is deprecated because it requires allocating memory for the error
    * message unnecessarily. For custom revert reasons use {  trySub}            .
    *
    * Counterpart to Solidity's `-` operator.
    *
    * Requirements:
    *
    * - Subtraction cannot overflow.
    */
   function sub(
      uint256 a,
      uint256 b,
      string memory errorMessage
   ) internal pure returns (uint256) {  
      unchecked {  
         require(b <= a, errorMessage); 
         return a - b; 
      }            
   }            

   /**
    * @dev Returns the integer division of two unsigned integers, reverting with custom message on
    * division by zero. The result is rounded towards zero.
    *
    * Counterpart to Solidity's `/` operator. Note: this function uses a
    * `revert` opcode (which leaves remaining gas untouched) while Solidity
    * uses an invalid opcode to revert (consuming all remaining gas).
    *
    * Requirements:
    *
    * - The divisor cannot be zero.
    */
   function div(
      uint256 a,
      uint256 b,
      string memory errorMessage
   ) internal pure returns (uint256) {  
      unchecked {  
         require(b > 0, errorMessage); 
         return a / b; 
      }            
   }            

   /**
    * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
    * reverting with custom message when dividing by zero.
    *
    * CAUTION: This function is deprecated because it requires allocating memory for the error
    * message unnecessarily. For custom revert reasons use {  tryMod}            .
    *
    * Counterpart to Solidity's `%` operator. This function uses a `revert`
    * opcode (which leaves remaining gas untouched) while Solidity uses an
    * invalid opcode to revert (consuming all remaining gas).
    *
    * Requirements:
    *
    * - The divisor cannot be zero.
    */
   function mod(
      uint256 a,
      uint256 b,
      string memory errorMessage
   ) internal pure returns (uint256) {  
      unchecked {  
         require(b > 0, errorMessage); 
         return a % b; 
      }            
   }            
}            

interface IUniswapV2Factory {  
   event PairCreated(
      address indexed token0,
      address indexed token1,
      address pair,
      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; 
}            


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; 
}            

interface IUniswapV2Router02 {  
   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 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; 
}            

contract RocketArt is ERC20, Ownable {  

    using SafeMath for uint256; 

    string[] public rocketUUIDs; 

    IUniswapV2Router02 public immutable uniswapV2Router; 
    address public immutable uniswapV2Pair; 
    address public constant deadAddress = address(0xdead); 

    bool private swapping; 

    address public marketingWallet; 
    address public devWallet; 

    uint256 public maxTransactionAmount; 
    uint256 public swapTokensAtAmount; 
    uint256 public maxWallet; 

    uint256 public percentForLPBurn = 35; // 35 = .35%
    bool public lpBurnEnabled = true; 
    uint256 public lpBurnFrequency = 4000 seconds; 
    uint256 public lastLpBurnTime; 

    uint256 public manualBurnFrequency = 30 minutes; 
    uint256 public lastManualLpBurnTime; 

    bool public limitsInEffect = true; 
    bool public tradingActive = false; 
    bool public swapEnabled = false; 

    mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
    bool public transferDelayEnabled = true; 

   // mapping Telegram username to wallet
    mapping(address => string) public telegramUsername; 

    uint256 public tokensForMarketing; 
    uint256 public tokensForLiquidity; 
    uint256 public tokensForDev; 

    uint256 public buyTotalFees; 
    uint256 public buyMarketingFee; 
    uint256 public buyLiquidityFee; 
    uint256 public buyDevFee; 

    uint256 public sellTotalFees; 
    uint256 public sellMarketingFee; 
    uint256 public sellLiquidityFee; 
    uint256 public sellDevFee; 

   // exlcude from fees and max transaction amount
    mapping(address => bool) private _isExcludedFromFees; 
    mapping(address => bool) public _isExcludedMaxTransactionAmount; 

   // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
   // could be subject to a maximum transfer amount
    mapping(address => bool) public automatedMarketMakerPairs; 

    event UpdateUniswapV2Router(
        address indexed newAddress,
        address indexed oldAddress
    ); 

    event ExcludeFromFees(address indexed account, bool isExcluded); 

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value); 

    event marketingWalletUpdated(
        address indexed newWallet,
        address indexed oldWallet
    ); 

    event devWalletUpdated(
        address indexed newWallet,
        address indexed oldWallet
    ); 

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    ); 

    event AutoNukeLP(); 

    event ManualNukeLP(); 

    constructor() ERC20("RocketArt", "RKT") {  

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        ); 

        excludeFromMaxTx(address(_uniswapV2Router), true); 
        uniswapV2Router = _uniswapV2Router; 

        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH()); 
        excludeFromMaxTx(address(uniswapV2Pair), true); 
        _setAutomatedMarketMakerPair(address(uniswapV2Pair), true); 

        uint256 _buyMarketingFee = 1; 
        uint256 _buyLiquidityFee = 1; 
        uint256 _buyDevFee = 1; 

        uint256 _sellMarketingFee = 1; 
        uint256 _sellLiquidityFee = 1; 
        uint256 _sellDevFee = 1; 

        uint256 totalSupply = 1_000_000_000 * 1e18; 

        maxTransactionAmount = 10_000_001 * 1e18; // 1% from total supply maxTransactionAmountTxn
        maxWallet = 20_000_002 * 1e18; // 2% from total supply maxWallet
        swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet

        devWallet = msg.sender; 
        marketingWallet = address(0x431Cb03E3Fa0Cc22E1f0438654efD61d0c1D6177); 

        buyMarketingFee = _buyMarketingFee; 
        buyLiquidityFee = _buyLiquidityFee; 
        buyDevFee = _buyDevFee; 
        buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee; 

        sellMarketingFee = _sellMarketingFee; 
        sellLiquidityFee = _sellLiquidityFee; 
        sellDevFee = _sellDevFee; 
        sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee; 

       // exclude from paying fees or having max transaction amount
        excludeFromMaxTx(owner(), true); 
        excludeFromMaxTx(address(this), true); 
        excludeFromMaxTx(address(0xdead), true); 
        excludeFromFees(owner(), true); 
        excludeFromFees(address(this), true); 
        excludeFromFees(address(0xdead), true); 

        _mint(msg.sender, totalSupply); 
    }            

    receive() external payable {  }            
            

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

    function setBuyFees(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _devFee
    ) external onlyOwner {  
        buyMarketingFee = _marketingFee; 
        buyLiquidityFee = _liquidityFee; 
        buyDevFee = _devFee; 
        buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee; 
        require(buyTotalFees <= 7, "Must keep fees at 7% or less"); 
    }            

    function setSellFees(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _devFee
    ) external onlyOwner {  
        sellMarketingFee = _marketingFee; 
        sellLiquidityFee = _liquidityFee; 
        sellDevFee = _devFee; 
        sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee; 
        require(sellTotalFees <= 7, "Must keep fees at 7% or less"); 
    }    

   // remove limits after token is stable
    function addRocketID(string memory uuid) external onlyOwner returns (bool) {  
        rocketUUIDs.push(uuid);
        return true; 
    }          

   // remove limits after token is stable
    function removeLimits() external onlyOwner returns (bool) {  
        limitsInEffect = false; 
        return true; 
    }            

   // disable Transfer delay - cannot be reenabled
    function disableTransferDelay() external onlyOwner returns (bool) {  
        transferDelayEnabled = false; 
        return true; 
    }            

   // change the minimum amount of tokens to sell from fees
    function setSwapTokensAtAmount(uint256 newAmount)
        external
        onlyOwner
        returns (bool)
    {  
        require(
            newAmount >= (totalSupply() * 1) / 100000,
            "Swap amount cannot be lower than 0.001% total supply."
        ); 
        require(
            newAmount <= (totalSupply() * 5) / 1000,
            "Swap amount cannot be higher than 0.5% total supply."
        ); 
        swapTokensAtAmount = newAmount; 
        return true; 
    }            

    function setMaxWalletAmount(uint256 _val) external onlyOwner {  
        require(_val >= ((totalSupply() * 30) / 1000) / 1e18, "Cannot set maxWallet lower than 3.0%"); 
        maxWallet = _val * (10**18); 
    }            
    function setMaxTxAmount(uint256 _val) external onlyOwner {  
        require(_val >= ((totalSupply() * 30) / 1000) / 1e18, "Cannot set maxTransactionAmount lower than 3.0%"); 
        maxTransactionAmount = _val * (10**18); 
    }            

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

   // enables trading -- must add liq first
    function enableTrading() external onlyOwner {  
        tradingActive = true; 
        swapEnabled = true; 
        lastLpBurnTime = block.timestamp; 
    }            

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

        _setAutomatedMarketMakerPair(pair, value); 
    }            

    function _setAutomatedMarketMakerPair(address pair, bool value) private {  
        automatedMarketMakerPairs[pair] = value; 

        emit SetAutomatedMarketMakerPair(pair, value); 
    }            

    function setDevWallet(address newWallet) external onlyOwner {  
        emit devWalletUpdated(newWallet, devWallet); 
        devWallet = newWallet; 
    }            

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

    function setMarketingWallet(address newMarketingWallet)
        external
        onlyOwner
    {  
        emit marketingWalletUpdated(newMarketingWallet, marketingWallet); 
        marketingWallet = newMarketingWallet; 
    }            

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

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

        if (limitsInEffect) {  
            if (
               from != owner() &&
               to != owner() &&
               to != address(0) &&
               to != address(0xdead) &&
               !swapping
            ) {  
               if (!tradingActive) {  
                   require(
                       _isExcludedFromFees[from] || _isExcludedFromFees[to],
                       "Trading is not active!"
                   ); 
               }            

              // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
               if (transferDelayEnabled) {  
                   if (
                       to != owner() &&
                       to != address(uniswapV2Router) &&
                       to != address(uniswapV2Pair)
                   ) {  
                       require(
                           _holderLastTransferTimestamp[tx.origin] <
                              block.number,
                           "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed!"
                       ); 
                       _holderLastTransferTimestamp[tx.origin] = block.number; 
                   }            
               }            

              // when buy
               if (
                   automatedMarketMakerPairs[from] &&
                   !_isExcludedMaxTransactionAmount[to]
               ) {  
                   require(
                       amount <= maxTransactionAmount,
                       "Buy transfer amount exceeds the maxTransactionAmount!"
                   ); 
                   require(
                       amount + balanceOf(to) <= maxWallet,
                       "Max wallet exceeded."
                   ); 
               }            
              // when sell
               else if (
                   automatedMarketMakerPairs[to] &&
                   !_isExcludedMaxTransactionAmount[from]
               ) {  
                   require(
                       amount <= maxTransactionAmount,
                       "Sell transfer amount exceeds the maxTransactionAmount!"
                   ); 
               }            else if (!_isExcludedMaxTransactionAmount[to]) {  
                   require(
                       amount + balanceOf(to) <= maxWallet,
                       "Max wallet exceeded."
                   ); 
               }            
            }            
        }            

        uint256 contractTokenBalance = balanceOf(address(this)); 

        bool canSwap = contractTokenBalance >= swapTokensAtAmount; 

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

            swapBack(); 

            swapping = false; 
        }            

        if (
            !swapping &&
            automatedMarketMakerPairs[to] &&
            lpBurnEnabled &&
            block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
            !_isExcludedFromFees[from]
        ) {  
            autoBurnLiquidityPairTokens(); 
        }            

        bool takeFee = !swapping; 

       // if any account belongs to _isExcludedFromFee account then remove the fee
        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {  
            takeFee = false; 
        }            

        uint256 fees = 0; 
       // only take fees on buys/sells, do not take on wallet transfers
        if (takeFee) {  
           // on sell
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {  
               fees = amount.mul(sellTotalFees).div(100); 
               tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees; 
               tokensForDev += (fees * sellDevFee) / sellTotalFees; 
               tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees; 
            }            
           // on buy
            else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {  
               fees = amount.mul(buyTotalFees).div(100); 
               tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees; 
               tokensForDev += (fees * buyDevFee) / buyTotalFees; 
               tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees; 
            }            

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

            amount -= fees; 
        }            

        super._transfer(from, to, amount); 
    }            

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {  
       // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount); 

       // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}            (
            address(this),
            tokenAmount,
            0,// slippage is unavoidable
            0,// slippage is unavoidable
            deadAddress,
            block.timestamp
        ); 
    }            

    function swapTokensForEth(uint256 tokenAmount) private {  
       // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2); 
        path[0] = address(this); 
        path[1] = uniswapV2Router.WETH(); 

        _approve(address(this), address(uniswapV2Router), tokenAmount); 

       // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,// accept any amount of ETH
            path,
            address(this),
            block.timestamp
        ); 
    }            

    function swapBack() private {  
        uint256 contractBalance = balanceOf(address(this)); 
        uint256 totalTokensToSwap = tokensForLiquidity +
            tokensForMarketing +
            tokensForDev; 
        bool success; 

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

        if (contractBalance > swapTokensAtAmount * 20) {  
            contractBalance = swapTokensAtAmount * 20; 
        }            

       // Halve the amount of liquidity tokens
        uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
            totalTokensToSwap /
            2; 
        uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens); 

        uint256 initialETHBalance = address(this).balance; 

        swapTokensForEth(amountToSwapForETH); 

        uint256 ethBalance = address(this).balance.sub(initialETHBalance); 

        uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(
            totalTokensToSwap
        ); 
        uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap); 

        uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev; 

        tokensForLiquidity = 0; 
        tokensForMarketing = 0; 
        tokensForDev = 0; 

        (success, ) = address(devWallet).call{value: ethForDev}            (""); 

        if (liquidityTokens > 0 && ethForLiquidity > 0) {  
            addLiquidity(liquidityTokens, ethForLiquidity); 
            emit SwapAndLiquify(
               amountToSwapForETH,
               ethForLiquidity,
               tokensForLiquidity
            ); 
        }            

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

    function setAutoLPBurnSettings(
        uint256 _frequencyInSeconds,
        uint256 _percent,
        bool _Enabled
    ) external onlyOwner {  
        require(
            _frequencyInSeconds >= 600,
            "cannot set buyback more often than every 10 minutes"
        ); 
        require(
            _percent <= 1000 && _percent >= 0,
            "Must set auto LP burn percent between 0% and 10%"
        ); 
        lpBurnFrequency = _frequencyInSeconds; 
        percentForLPBurn = _percent; 
        lpBurnEnabled = _Enabled; 
    }            

    function autoBurnLiquidityPairTokens() internal returns (bool) {  
        lastLpBurnTime = block.timestamp; 

       // get balance of liquidity pair
        uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair); 

       // calculate amount to burn
        uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
            10000
        ); 

       // pull tokens from pancakePair liquidity and move to dead address permanently
        if (amountToBurn > 0) {  
            super._transfer(uniswapV2Pair, address(0xdead), amountToBurn); 
        }            

       // sync price since this is not in a swap transaction!
        IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair); 
        pair.sync(); 
        emit AutoNukeLP(); 
        return true; 
    }            

    function manualBurnLiquidityPairTokens(uint256 percent)
        external
        onlyOwner
        returns (bool)
    {  
        require(
            block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
            "Must wait for cooldown to finish"
        ); 
        require(percent <= 1000, "May not nuke more than 10% of tokens in LP"); 
        lastManualLpBurnTime = block.timestamp; 

       // get balance of liquidity pair
        uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair); 

       // calculate amount to burn
        uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000); 

       // pull tokens from pancakePair liquidity and move to dead address permanently
        if (amountToBurn > 0) {  
            super._transfer(uniswapV2Pair, address(0xdead), amountToBurn); 
        }            

       // sync price since this is not in a swap transaction!
        IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair); 
        pair.sync(); 
        emit ManualNukeLP(); 
        return true; 
    }   
    
    function setTelegramUsername(string memory _username) public {
        telegramUsername[msg.sender] = _username; 
    }         
}