// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;

abstract contract Context 
{
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


contract Ownable is Context 
{
    address private _owner;
    address private _previousOwner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor () 
    {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }



    function owner() public view returns (address) 
    {
        return _owner;
    }   
    
    modifier onlyOwner() 
    {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
    
    function renounceOwnership() public virtual onlyOwner 
    {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }


    function transferOwnership(address newOwner) public virtual onlyOwner 
    {
        require(newOwner != address(0), "Ownable: New owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}


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);
}


library SafeMath {


    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }


    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }


    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        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) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }


    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }


    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }


    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }


    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }


    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }


    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }


    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }


    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}


contract LockToken is Ownable {

    bool public isOpen = false;
    mapping(address => bool) private _whiteList;
    modifier open(address from, address to) {
        require(isOpen || _whiteList[from] || _whiteList[to], "Not Open");
        _;
    }

    constructor() {
        _whiteList[msg.sender] = true;
        _whiteList[address(this)] = true;
    }

    function openTrade() external onlyOwner {
        isOpen = true;
    }


    function includeToWhiteList(address[] memory _users) external onlyOwner {
        for(uint8 i = 0; i < _users.length; i++) {
            _whiteList[_users[i]] = true;
        }
    }
}


contract DRAGONTYRANT is Context, IERC20, LockToken 
{
      using SafeMath for uint256;
      mapping (address => uint256) private _balances;
      mapping (address => mapping (address => uint256)) private _allowances;

      uint256 private _totalSupply;
      string private _name;
      string private _symbol;
      uint8 private _decimals;
      address public marketingAddress; 
      uint256 public _maxTxAmount;

    constructor() 
    { 
      _name = "DRAGON TYRANT";
      _symbol = "D TYRANT";
      _decimals = 18;

      _mint(_msgSender(), 66_666_666 * 10**18);
      _maxTxAmount = 2_666_666 * 10**18;

    }



    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 _decimals;
    }

 
    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) 
    {
        _transferTokens(_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) 
    {
        _transferTokens(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }



    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) 
    {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }



    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) 
    {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }



    function _transferTokens(address from, address to, uint256 amount) internal virtual 
    {
        require(amount <= _maxTxAmount, "Exceeds Max Tx Amount");
         _transfer(from, to, amount);
    }



    function _transfer(address sender, address recipient, uint256 amount) internal virtual open(sender, recipient) 
    {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }



    function _mint(address account, uint256 amount) internal virtual 
    {
        require(account != address(0), "ERC20: mint to the zero address");
        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(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 setMaxTxnLimit(uint256 newLimit) external onlyOwner
    {
        require(newLimit>666666 * 10**18, "Limit is very less.");
        _maxTxAmount =  newLimit;
    }


}