// SPDX-License-Identifier: Unlicensed

//t.me/fkfrens


pragma solidity ^0.8.16;

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) {
        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 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;
        }
    }

}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; 
        return msg.data;
    }
}

abstract contract Ownable is Context {
    address internal _owner;
    address private _previousOwner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    constructor() {
        _owner = _msgSender();
        emit OwnershipTransferred(address(0), _owner);
    }

    function owner() public view virtual 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 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);
}

interface IUniswapV2Router02 is IuniswapV2Router01 {
}

contract Fkfrens is Context, IERC20, Ownable {

    using SafeMath for uint256;
    mapping(address => uint256) private _rOwned;
    mapping(address => uint256) private _tOwned;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;
    mapping(address => bool) private _isExcluded;
    mapping(address => bool) private _isExcludedFromMaxWallet;

    address[] private _excluded;
    address public _marketingWalletAddress;
    address constant _burnAddress = 0x000000000000000000000000000000000000dEaD;
    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal;
    uint256 private _rTotal;
    uint256 private _tFeeTotal;
    string private _name;
    string private _symbol;
    uint256 private _decimals;

    uint256 private _buyTaxFee = 0;
    uint256 private _buyMarketingFee = 3000;
    uint256 private _buyBurnFee = 0;

    uint256 private _sellTaxFee = 0;
    uint256 private _sellMarketingFee = 3000;
    uint256 private _sellBurnFee = 0;

    uint256 public _taxFee = _buyTaxFee;
    uint256 public _marketingFee = _buyMarketingFee;
    uint256 public _burnFee = _buyBurnFee;

    uint256 private _previousTaxFee = _taxFee;
    uint256 private _previousMarketingFee = _marketingFee;
    uint256 private _previousBurnFee = _burnFee;

    IUniswapV2Router02  public uniswapV2Router ;
    address public uniswapV2Pair;
    uint256 public maxWalletBalance;
    bool public tradingEnabled = true;

    constructor() {
        _name = "Fk onlyfrens"; //  
        _symbol = "Fkfrens"; // 
        _decimals = 18; // 
        _tTotal = 100000000 * 10**_decimals; //  
        maxWalletBalance = 100000000  * 10**_decimals; //   
        _rTotal = (MAX - (MAX % _tTotal));
        _marketingWalletAddress =  0x68CE510de1882c97D22346F6515Ddc3664E2268b;  // 
        _rOwned[_msgSender()] = _rTotal;

        IUniswapV2Router02  _uniswapV2Router = IUniswapV2Router02 (
             0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        uniswapV2Pair  = IUniswapV2Factory (_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router  = _uniswapV2Router;
        _owner = _msgSender();

        _isExcludedFromFee[_msgSender()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_marketingWalletAddress] = true;

        _isExcludedFromMaxWallet[owner()] = true;
        _isExcludedFromMaxWallet[address(this)] = true;
        _isExcludedFromMaxWallet[_burnAddress] = true;
        _isExcludedFromMaxWallet[_marketingWalletAddress]= true;

        _isExcluded[_burnAddress] = true;
        _isExcluded[uniswapV2Pair ] = true;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint256) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function transfer(address recipient, uint256 amount)
        public
        override
        returns (bool)
    {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender)
        public
        view
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount)
        public
        override
        returns (bool)
    {
        _approve(_msgSender(), spender, 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 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 isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }

    function totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }

    function deliver(uint256 tAmount) public {
        address sender = _msgSender();
        require(
            !_isExcluded[sender],
            "Excluded addresses cannot call this function"
        );
        (uint256 rAmount, , , , , , ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rTotal = _rTotal.sub(rAmount);
        _tFeeTotal = _tFeeTotal.add(tAmount);
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee)
        public
        view
        returns (uint256)
    {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount, , , , , , ) = _getValues(tAmount);
            return rAmount;
        } else {
            (, uint256 rTransferAmount, , , , , ) = _getValues(tAmount);
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount)
        public
        view
        returns (uint256)
    {
        require(
            rAmount <= _rTotal,
            "Amount must be less than total reflections"
        );
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner {
        require(!_isExcluded[account], "Account is already excluded");
        if (_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function includeInReward(address account) external onlyOwner {
        require(_isExcluded[account], "Account is already included");
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    function _transferBothExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tBurn,
            uint256 tMarket
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }

     function enableTrading() external onlyOwner {
        tradingEnabled = true;
    }

    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }

    function includeAndExcludedFromMaxWallet(address account, bool value) public onlyOwner {
            _isExcludedFromMaxWallet[account] = value;
    }

    function isExcludedFromMaxWallet(address account) public view returns(bool){
            return _isExcludedFromMaxWallet[account];
    }

    function setSellFeePercent(
        uint256 tFee,
        uint256 mFee,
        uint256 cFee
    ) external onlyOwner {
        _sellTaxFee = tFee;
        _taxFee = _sellTaxFee;
        _sellMarketingFee = mFee;
        _marketingFee = _sellMarketingFee;
        _sellBurnFee = cFee;
        _burnFee = _sellBurnFee;
    }

    function setBuyFeePercent(
        uint256 tFee,
        uint256 mFee,
        uint256 cFee
    ) external onlyOwner {
        _buyTaxFee = tFee;
        _taxFee = _buyTaxFee;
        _buyMarketingFee = mFee;
        _marketingFee = _buyMarketingFee;
        _buyBurnFee = cFee;
        _burnFee = _buyBurnFee;
    }

    function setMarketingWalletAddress(address _addr) external onlyOwner {
        _marketingWalletAddress = _addr;
    }

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function _getValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        (
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tBurn,
            uint256 tMarket
        ) = _getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(
            tAmount,
            tFee,
            tBurn,
            tMarket,
            _getRate()
        );
        return (
            rAmount,
            rTransferAmount,
            rFee,
            tTransferAmount,
            tFee,
            tBurn,
            tMarket
        );
    }

    function _getTValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tBurn = calculateBurn(tAmount);
        uint256 tMarket = calculateMarketingFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tBurn).sub(
            tMarket
        );
        return (tTransferAmount, tFee, tBurn, tMarket);
    }

    function _getRValues(
        uint256 tAmount,
        uint256 tFee,
        uint256 tBurn,
        uint256 tMarket,
        uint256 currentRate
    )
        private
        pure
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rBurn = tBurn.mul(currentRate);
        uint256 rMarket= tMarket.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rBurn).sub(
            rMarket
        );
        return (rAmount, rTransferAmount, rFee);
    }

    function _getRate() private view returns (uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns (uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (
                _rOwned[_excluded[i]] > rSupply ||
                _tOwned[_excluded[i]] > tSupply
            ) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function _takeBurn(uint256 tBurn)
        private
    {
         uint256 currentRate = _getRate();
        uint256 rBurn = tBurn.mul(
            currentRate
        );
        _rOwned[_burnAddress] = _rOwned[_burnAddress].add(
            rBurn
        );
        if (_isExcluded[_burnAddress])
            _tOwned[_burnAddress] = _tOwned[_burnAddress].add(
                tBurn
            );
    }

    function _takeMarketing(uint256 tMarket) private {
        uint256 currentRate = _getRate();
        uint256 rMarket = tMarket.mul(currentRate);
        _rOwned[_marketingWalletAddress] = _rOwned[_marketingWalletAddress].add(
            rMarket
        );
        if (_isExcluded[_marketingWalletAddress])
            _tOwned[_marketingWalletAddress] = _tOwned[_marketingWalletAddress].add(
                tMarket
            );
    }

    function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_taxFee).div(10**4);
    }

    function calculateMarketingFee(uint256 _amount)
        private
        view
        returns (uint256)
    {
        return _amount.mul(_marketingFee).div(10**4);
    }

    function calculateBurn(uint256 _amount)
        private
        view
        returns (uint256)
    {
        return _amount.mul(_burnFee).div(10**4);
    }

    function removeAllFee() private {
        _previousTaxFee = _taxFee;
        _previousMarketingFee = _marketingFee;
        _previousBurnFee = _burnFee;

        _taxFee = 0;
        _marketingFee = 0;
        _burnFee = 0;
    }

    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _marketingFee = _previousMarketingFee;
        _burnFee = _previousBurnFee;
    }

    function isExcludedFromFee(address account) public view returns (bool) {
        return _isExcludedFromFee[account];
    }

    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 _transfer(
        address from,
        address to,
        uint256 amount
    ) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        if (from != owner() && !tradingEnabled) {
            require(tradingEnabled, "Trading is not enabled yet");
        }

         if (
                from != owner() &&
                to != address(this) &&
                to != _burnAddress &&
                to != uniswapV2Pair
            ) {
                uint256 currentBalance = balanceOf(to);
                require(
                    _isExcludedFromMaxWallet[to] ||
                        (currentBalance + amount <= maxWalletBalance),
                    "ERC20: Reached Max wallet holding"
                );
            }
        
        bool takeFee = true;
        if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
            takeFee = false;
        } else {
            if (from == uniswapV2Pair ) {
                _taxFee = _buyTaxFee;
                _marketingFee = _buyMarketingFee;
                _burnFee = _buyBurnFee;
            } else if (to == uniswapV2Pair ) {
                _taxFee = _sellTaxFee;
                _marketingFee = _sellMarketingFee;
                _burnFee = _sellBurnFee;
            } else {
                _taxFee = 0;
                _marketingFee = 0;
                _burnFee = 0;
            }
        }
       
        _tokenTransfer(from, to, amount, takeFee);

    }

    function _tokenTransfer(
        address sender,
        address recipient,
        uint256 amount,
        bool takeFee
    ) private {
        if (!takeFee) removeAllFee();

        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, amount);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount);
        } else {
            _transferStandard(sender, recipient, amount);
        }

        if (!takeFee) restoreAllFee();
    }

    function _transferStandard(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tBurn,
            uint256 tMarket
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferToExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tBurn,
            uint256 tMarket
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferFromExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tBurn,
            uint256 tMarket
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }
}