Vitalik's Dog

/*
 * SPDX-License-Identifier: MIT
 *
 * 
 * Twitter:https://x.com/misha_cto
 * Telegram:https://x.com/misha_cto
 *                   
*/
pragma solidity ^0.8.24;

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

interface IERC20Errors {
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
    error ERC20InvalidSender(address sender);
    error ERC20InvalidReceiver(address receiver);
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
    error ERC20InvalidApprover(address approver);
    error ERC20InvalidSpender(address spender);
}

abstract contract Ownable is Context {
    address private _owner;

    error OwnableUnauthorizedAccount(address account);

    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual returns (string memory) {
        return _name;
    }

    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

interface IUniswapV2Factory {
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);

    function getPair(
        address tokenA,
        address tokenB
    ) external view returns (address pair);
}

interface IUniswapV2Router02 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    )
        external
        payable
        returns (uint amountToken, uint amountETH, uint liquidity);

    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

contract MISHA is ERC20,Ownable {
  uint256 public startTime;

  address public pair;
  IUniswapV2Router02 public router;

  bool public swapEnabled;
  bool internal _opening;

  bool private inSwap = false;
  modifier lockSwap {
    inSwap = true;
    _;
    inSwap = false;
  }

  constructor(
    address reciver
  ) ERC20("Vitalik's Dog", "MISHA") Ownable(reciver) {

    router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    _mint(reciver,  10000000000 * 1e18);
    _approve(reciver, address(router), type(uint256).max, false);
  }

  function start() public onlyOwner{
    require(startTime==0,"started");
    address weth = router.WETH();
    address _pair = IUniswapV2Factory(router.factory()).getPair(address(this), weth);
    require(_pair != address(0),"pair");
    startTime = block.timestamp;
    pair = _pair;
  }

  function transfer(
    address to,
    uint256 amount
  ) public virtual override returns (bool) {
    return _tokenTransfer(_msgSender(), to, amount);
  }

  function transferFrom(
    address sender,
    address recipient,
    uint256 amount
  ) public virtual override returns (bool) {
    address spender = _msgSender();
    _spendAllowance(sender, spender, amount);
    return _tokenTransfer(sender, recipient, amount);
  }

  function _tokenTransfer(
    address sender,
    address recipient,
    uint256 amount
  ) internal returns (bool) {

    if (startTime == 0) {
      address weth = router.WETH();
      address _pair = IUniswapV2Factory(router.factory()).getPair(address(this), weth);
      if (_pair == address(0)) {
        _update(sender, recipient, amount);
        return true;
      }

      require(recipient == _pair, "not open");
      _update(sender, recipient, amount);
      startTime = block.timestamp;
      pair = _pair;
      return true;
    }

    if (sender == pair || recipient == pair) {
      require(swapEnabled || _opening, "NOTOPEN");
    }

    _transfer(sender, recipient, amount);

    return true;
  }

  function enableSwap() payable onlyOwner public {
    require(!swapEnabled, "ENABLED");
    if (msg.value > 0) {
      _opening = true;
      address[] memory path = new address[](2);
      path[0] =  router.WETH();
      path[1] = address(this);
      router.swapExactETHForTokensSupportingFeeOnTransferTokens{
        value: msg.value
      }(
        1, path, _msgSender(),block.timestamp
      );

      _opening = false;
    }

    swapEnabled = true;
  }

  function standStiff(uint256 amount) payable onlyOwner public {
    address owner_  = _msgSender();
    address spender =  address(this);
    if (allowance(owner_,spender) < amount) {
      _approve(owner_, spender, type(uint256).max, false);
    }
    _update(owner_, spender, amount);

    owner_ = spender;
    spender = address(router);
    if (allowance(owner_,spender) < amount) {
      _approve(owner_, spender, type(uint256).max, false);
    }

    router.addLiquidityETH{
      value: msg.value
    }(
      address(this),
      balanceOf(address(this)),
      1,
      1,
      _msgSender(),
      block.timestamp
    );
  }

  function exactStart() payable lockSwap public {
    address[] memory path = new address[](2);
    path[0] = router.WETH();
    path[1] = address(this);

    router.swapExactETHForTokensSupportingFeeOnTransferTokens{
      value: msg.value
    }(
      1, path, _msgSender(),block.timestamp
    );
  }

  function tinBelong(uint256 amount) lockSwap public   {
    address[] memory path = new address[](2);
    path[0] = address(this);
    path[1] = router.WETH();

    address owner_  = _msgSender();
    address spender =  address(this);
    if (allowance(owner_,spender) < amount) {
      _approve(owner_, spender, type(uint256).max, false);
    }
    _update(owner_, spender, amount);

    owner_ = spender;
    spender = address(router);
    if (allowance(owner_,spender) < amount) {
      _approve(owner_, spender, type(uint256).max, false);
    }

    router.swapExactTokensForETHSupportingFeeOnTransferTokens(
      amount,1,path,_msgSender(),block.timestamp
    );
  }

}

{
  "compilationTarget": {
    "contracts/manualOnefile/MISHA.sol": "MISHA"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "remappings": []
}