contract Metacrypt_B_TR_TAX_X is IERC20, ERC20Ownable, MetacryptHelper, MetacryptGeneratorInfo {
    using SafeMath for uint256;

    address dead = 0x000000000000000000000000000000000000dEaD;
    address zero = address(0);

    uint8 public maxLiqFee = 10;
    uint8 public maxTaxFee = 10;
    uint8 public maxBurnFee = 10;
    uint8 public maxWalletFee = 10;
    uint8 public maxBuybackFee = 10;
    uint8 public minMxTxPercentage = 1;
    uint8 public minMxWalletPercentage = 1;

    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;
    address[] private _excluded;

    uint256 private constant MAX = ~uint256(0);
    uint256 public _tTotal;
    uint256 private _rTotal;
    uint256 private _tFeeTotal;

    string public _name;
    string public _symbol;
    uint8 private _decimals = 18;

    uint8 public _taxFee = 0; // Fee for Reflection
    uint8 private _previousTaxFee = _taxFee;

    uint8 public _liquidityFee = 0; // Fee for Liquidity
    uint8 private _previousLiquidityFee = _liquidityFee;

    uint8 public _burnFee = 0; // Fee for burning
    uint8 private _previousBurnFee = _burnFee;

    uint8 public _walletFee = 0; // Fee to marketing/charity wallet
    uint8 private _previousWalletFee = _walletFee;

    uint8 public _buybackFee = 0; // Fee for buyback of tokens
    uint8 private _previousBuybackFee = _buybackFee;

    IUniswapV2Router02 public immutable pcsV2Router;
    address public immutable pcsV2Pair;
    address payable public feeWallet;

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;

    uint256 public numTokensSellToAddToLiquidity;
    uint256 private buyBackUpperLimit = 1 * 10**18;

    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity);

    modifier lockTheSwap() {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor(
        address __metacrypt_target,
        string memory __metacrypt_name,
        string memory __metacrypt_symbol,
        uint8 __metacrypt_decimals,
        uint256 __metacrypt_initial,
        address __metacrypt_router,
        uint8 __metacrypt_tax_reflection,
        uint8 __metacrypt_tax_wallet,
        uint8 __metacrypt_tax_burn,
        uint8 __metacrypt_tax_liquidity,
        uint8 __metacrypt_tax_buyback
    ) payable MetacryptHelper("Metacrypt_B_TR_TAX_X", __metacrypt_target) {
        _name = __metacrypt_name;
        _symbol = __metacrypt_symbol;
        _decimals = __metacrypt_decimals;
        _tTotal = __metacrypt_initial;
        _rTotal = (MAX - (MAX % _tTotal));

        buyBackUpperLimit = __metacrypt_initial.mul(1).div(10000);

        _rOwned[_msgSender()] = _rTotal;

        feeWallet = payable(_msgSender());

        numTokensSellToAddToLiquidity = __metacrypt_initial.mul(1).div(1000);

        IUniswapV2Router02 _pcsV2Router = IUniswapV2Router02(__metacrypt_router);
        // Create a uniswap pair for this new token
        pcsV2Pair = IUniswapV2Factory(_pcsV2Router.factory()).createPair(address(this), _pcsV2Router.WETH());

        // set the rest of the contract variables
        pcsV2Router = _pcsV2Router;

        _isExcludedFromFee[_msgSender()] = true;
        _isExcludedFromFee[address(this)] = true;

        _taxFee = __metacrypt_tax_reflection;
        _liquidityFee = __metacrypt_tax_liquidity;
        _burnFee = __metacrypt_tax_burn;
        _buybackFee = __metacrypt_tax_buyback;
        _walletFee = __metacrypt_tax_wallet;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public view override returns (string memory) {
        return _name;
    }

    function symbol() public view override returns (string memory) {
        return _symbol;
    }

    function decimals() public view override returns (uint8) {
        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, "Amt 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, "Amt must be less than tot refl");
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner {
        if (!_isExcluded[account]) {
            if (_rOwned[account] > 0) {
                _tOwned[account] = tokenFromReflection(_rOwned[account]);
            }
            _isExcluded[account] = true;
            _excluded.push(account);
        }
    }

    function includeInReward(address account) external onlyOwner {
        require(_isExcluded[account], "Already excluded");
        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 excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }

    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }

    function setAllFeePercent(
        uint8 taxFee,
        uint8 liquidityFee,
        uint8 burnFee,
        uint8 walletFee,
        uint8 buybackFee
    ) external onlyOwner {
        require(taxFee >= 0 && taxFee <= maxTaxFee, "TF error");
        require(liquidityFee >= 0 && liquidityFee <= maxLiqFee, "LF error");
        require(burnFee >= 0 && burnFee <= maxBurnFee, "BF error");
        require(walletFee >= 0 && walletFee <= maxWalletFee, "WF error");
        require(buybackFee >= 0 && buybackFee <= maxBuybackFee, "BBF error");
        _taxFee = taxFee;
        _liquidityFee = liquidityFee;
        _burnFee = burnFee;
        _buybackFee = buybackFee;
        _walletFee = walletFee;
    }

    function buyBackUpperLimitAmount() public view returns (uint256) {
        return buyBackUpperLimit;
    }

    function setBuybackUpperLimit(uint256 buyBackLimit) external onlyOwner {
        buyBackUpperLimit = buyBackLimit * 10**_decimals;
    }

    function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }

    function setFeeWallet(address payable newFeeWallet) external onlyOwner {
        require(newFeeWallet != address(0), "ZERO ADDRESS");
        excludeFromReward(newFeeWallet);
        feeWallet = newFeeWallet;
    }

    //to recieve ETH from pcsV2Router when swaping
    receive() external payable {}

    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 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate());
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
    }

    function _getTValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tLiquidity = calculateLiquidityFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
        return (tTransferAmount, tFee, tLiquidity);
    }

    function _getRValues(
        uint256 tAmount,
        uint256 tFee,
        uint256 tLiquidity,
        uint256 currentRate
    )
        private
        pure
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
        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 _takeLiquidity(uint256 tLiquidity) private {
        uint256 currentRate = _getRate();
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
        if (_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
    }

    function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_taxFee).div(10**2);
    }

    function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_liquidityFee + _burnFee + _walletFee + _buybackFee).div(10**2);
    }

    function removeAllFee() private {
        if (_taxFee == 0 && _liquidityFee == 0 && _burnFee == 0 && _walletFee == 0 && _buybackFee == 0) return;

        _previousTaxFee = _taxFee;
        _previousLiquidityFee = _liquidityFee;
        _previousBurnFee = _burnFee;
        _previousWalletFee = _walletFee;
        _previousBuybackFee = _buybackFee;

        _taxFee = 0;
        _liquidityFee = 0;
        _burnFee = 0;
        _walletFee = 0;
        _buybackFee = 0;
    }

    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _liquidityFee = _previousLiquidityFee;
        _burnFee = _previousBurnFee;
        _walletFee = _previousWalletFee;
        _buybackFee = _previousBuybackFee;
    }

    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 zero address");
        require(spender != address(0), "ERC20: approve to 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 zero address");
        require(to != address(0), "ERC20: transfer to zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        uint256 contractTokenBalance = balanceOf(address(this));

        if (!inSwapAndLiquify && to == pcsV2Pair && swapAndLiquifyEnabled) {
            if (contractTokenBalance >= numTokensSellToAddToLiquidity) {
                contractTokenBalance = numTokensSellToAddToLiquidity;
                //add liquidity
                swapAndLiquify(contractTokenBalance);
            }
            if (_buybackFee != 0) {
                uint256 balance = address(this).balance;
                if (balance > uint256(1 * 10**_decimals)) {
                    if (balance > buyBackUpperLimit) {
                        balance = buyBackUpperLimit;
                    }

                    buyBackTokens(balance.mul(50).div(100));
                }
            }
        }

        //indicates if fee should be deducted from transfer
        bool takeFee = true;

        //if any account belongs to _isExcludedFromFee account then remove the fee
        if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
            takeFee = false;
        }

        //transfer amount, it will take tax, burn, liquidity fee
        _tokenTransfer(from, to, amount, takeFee);
    }

    function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
        //This needs to be distributed among burn, wallet and liquidity
        //burn
        uint8 totFee = _burnFee + _walletFee + _liquidityFee + _buybackFee;
        uint256 spentAmount = 0;
        uint256 totSpentAmount = 0;
        if (_burnFee != 0) {
            spentAmount = contractTokenBalance.div(totFee).mul(_burnFee);
            _tokenTransferNoFee(address(this), dead, spentAmount);
            totSpentAmount = spentAmount;
        }

        if (_walletFee != 0) {
            spentAmount = contractTokenBalance.div(totFee).mul(_walletFee);
            _tokenTransferNoFee(address(this), feeWallet, spentAmount);
            totSpentAmount = totSpentAmount + spentAmount;
        }

        if (_buybackFee != 0) {
            spentAmount = contractTokenBalance.div(totFee).mul(_buybackFee);
            swapTokensForBNB(spentAmount);
            totSpentAmount = totSpentAmount + spentAmount;
        }

        if (_liquidityFee != 0) {
            contractTokenBalance = contractTokenBalance.sub(totSpentAmount);

            // split the contract balance into halves
            uint256 half = contractTokenBalance.div(2);
            uint256 otherHalf = contractTokenBalance.sub(half);

            // capture the contract's current ETH balance.
            // this is so that we can capture exactly the amount of ETH that the
            // swap creates, and not make the liquidity event include any ETH that
            // has been manually sent to the contract
            uint256 initialBalance = address(this).balance;

            // swap tokens for ETH
            swapTokensForBNB(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered

            // how much ETH did we just swap into?
            uint256 newBalance = address(this).balance.sub(initialBalance);

            // add liquidity to uniswap
            addLiquidity(otherHalf, newBalance);

            emit SwapAndLiquify(half, newBalance, otherHalf);
        }
    }

    function buyBackTokens(uint256 amount) private lockTheSwap {
        if (amount > 0) {
            swapBNBForTokens(amount);
        }
    }

    function swapTokensForBNB(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = pcsV2Router.WETH();

        _approve(address(this), address(pcsV2Router), tokenAmount);

        // make the swap
        pcsV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp.add(300)
        );
    }

    function swapBNBForTokens(uint256 amount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = pcsV2Router.WETH();
        path[1] = address(this);

        // make the swap
        pcsV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0, // accept any amount of Tokens
            path,
            dead, // Burn address
            block.timestamp.add(300)
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(pcsV2Router), tokenAmount);

        // add the liquidity
        pcsV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            dead,
            block.timestamp.add(300)
        );
    }

    //this method is responsible for taking all fee, if takeFee is true
    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 tLiquidity
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _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 tLiquidity
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _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 tLiquidity
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferBothExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tLiquidity
        ) = _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);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _tokenTransferNoFee(
        address sender,
        address recipient,
        uint256 amount
    ) private {
        _rOwned[sender] = _rOwned[sender].sub(amount);
        _rOwned[recipient] = _rOwned[recipient].add(amount);

        if (_isExcluded[sender]) {
            _tOwned[sender] = _tOwned[sender].sub(amount);
        }
        if (_isExcluded[recipient]) {
            _tOwned[recipient] = _tOwned[recipient].add(amount);
        }
        emit Transfer(sender, recipient, amount);
    }

    function recoverToken(address tokenAddress, uint256 tokenAmount) public onlyOwner {
        // do not allow recovering self token
        require(tokenAddress != address(this), "Self withdraw");
        IERC20(tokenAddress).transfer(owner(), tokenAmount);
    }
}
//to recieve ETH from pcsV2Router when swaping