contract Extraterrestrial is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    address public immutable deadAddress = 0x000000000000000000000000000000000000dEaD;
    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => User) private cooldown;

    mapping (address => bool) private _isSniper;
    address[] private _confirmedSnipers;

    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _isExcluded;
    address[] private _excluded;

    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal = 1000000000000 * 10**9;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    string private _name = "Extraterrestrial";
    string private _symbol = "ET";
    uint8 private _decimals = 9;
    
    address payable private teamDevAddress;

    uint256 public launchTime;
    uint256 private buyLimitEnd;
    
    
    uint256 public _taxFee = 0;
    uint256 private _previousTaxFee = _taxFee;
    uint256 public _liquidityFee=0;
    uint256 private _previousLiquidityFee = _liquidityFee;
    uint256 public _baseLiqFee;
    
    bool private _useImpactFeeSetter = true;
    uint256 private _feeMultiplier = 1000;
    
    
    uint256 public _minTrigger = 0;
    uint256 public k = 10;
    uint256 public _baseAmount = 1*10**15;

    uint private _maxBuyAmount;
    bool private _cooldownEnabled=true;

    bool public tradingOpen = false; //once switched on, can never be switched off.
    


    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = false;
    bool public buyBackEnabled = false;
    
    struct User {
        uint256 buy;
        uint256 sell;
        bool exists;
    }
    
    event BuyBackEnabledUpdated(bool enabled);
  

    event SwapETHForTokens(
        uint256 amountIn,
        address[] path
    );

    event SwapTokensForETH(
        uint256 amountIn,
        address[] path
    );

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

    constructor () {
        _rOwned[_msgSender()] = _rTotal;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function enableTrading() external onlyOwner() {
        _maxBuyAmount = 2000000000 * 10**9;
        _baseLiqFee=20;
        _liquidityFee=_baseLiqFee;
        _taxFee=0;
        swapAndLiquifyEnabled = true;
        tradingOpen = true;
        launchTime = block.timestamp;
        buyLimitEnd = block.timestamp + (240 seconds);
    }

    function initContract() external onlyOwner() {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
        .createPair(address(this), _uniswapV2Router.WETH());

        uniswapV2Router = _uniswapV2Router;

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

        
        _isSniper[address(0x7589319ED0fD750017159fb4E4d96C63966173C1)] = true;
        _confirmedSnipers.push(address(0x7589319ED0fD750017159fb4E4d96C63966173C1));

        _isSniper[address(0x65A67DF75CCbF57828185c7C050e34De64d859d0)] = true;
        _confirmedSnipers.push(address(0x65A67DF75CCbF57828185c7C050e34De64d859d0));

        _isSniper[address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce)] = true;
        _confirmedSnipers.push(address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce));

        _isSniper[address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce)] = true;
        _confirmedSnipers.push(address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce));

        _isSniper[address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345)] = true;
        _confirmedSnipers.push(address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345));

        _isSniper[address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b)] = true;
        _confirmedSnipers.push(address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b));

        _isSniper[address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95)] = true;
        _confirmedSnipers.push(address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95));

        _isSniper[address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964)] = true;
        _confirmedSnipers.push(address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964));

        _isSniper[address(0xDC81a3450817A58D00f45C86d0368290088db848)] = true;
        _confirmedSnipers.push(address(0xDC81a3450817A58D00f45C86d0368290088db848));

        _isSniper[address(0x45fD07C63e5c316540F14b2002B085aEE78E3881)] = true;
        _confirmedSnipers.push(address(0x45fD07C63e5c316540F14b2002B085aEE78E3881));

        _isSniper[address(0x27F9Adb26D532a41D97e00206114e429ad58c679)] = true;
        _confirmedSnipers.push(address(0x27F9Adb26D532a41D97e00206114e429ad58c679));

        _isSniper[address(0x9282dc5c422FA91Ff2F6fF3a0b45B7BF97CF78E7)] = true;
        _confirmedSnipers.push(address(0x9282dc5c422FA91Ff2F6fF3a0b45B7BF97CF78E7));

        _isSniper[address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533)] = true;
        _confirmedSnipers.push(address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533));

        _isSniper[address(0x1d6E8BAC6EA3730825bde4B005ed7B2B39A2932d)] = true;
        _confirmedSnipers.push(address(0x1d6E8BAC6EA3730825bde4B005ed7B2B39A2932d));

        _isSniper[address(0x000000000000084e91743124a982076C59f10084)] = true;
        _confirmedSnipers.push(address(0x000000000000084e91743124a982076C59f10084));

        _isSniper[address(0x6dA4bEa09C3aA0761b09b19837D9105a52254303)] = true;
        _confirmedSnipers.push(address(0x6dA4bEa09C3aA0761b09b19837D9105a52254303));

        _isSniper[address(0x323b7F37d382A68B0195b873aF17CeA5B67cd595)] = true;
        _confirmedSnipers.push(address(0x323b7F37d382A68B0195b873aF17CeA5B67cd595));

        _isSniper[address(0x000000005804B22091aa9830E50459A15E7C9241)] = true;
        _confirmedSnipers.push(address(0x000000005804B22091aa9830E50459A15E7C9241));

        _isSniper[address(0xA3b0e79935815730d942A444A84d4Bd14A339553)] = true;
        _confirmedSnipers.push(address(0xA3b0e79935815730d942A444A84d4Bd14A339553));

        _isSniper[address(0xf6da21E95D74767009acCB145b96897aC3630BaD)] = true;
        _confirmedSnipers.push(address(0xf6da21E95D74767009acCB145b96897aC3630BaD));

        _isSniper[address(0x0000000000007673393729D5618DC555FD13f9aA)] = true;
        _confirmedSnipers.push(address(0x0000000000007673393729D5618DC555FD13f9aA));

        _isSniper[address(0x00000000000003441d59DdE9A90BFfb1CD3fABf1)] = true;
        _confirmedSnipers.push(address(0x00000000000003441d59DdE9A90BFfb1CD3fABf1));

        _isSniper[address(0x59903993Ae67Bf48F10832E9BE28935FEE04d6F6)] = true;
        _confirmedSnipers.push(address(0x59903993Ae67Bf48F10832E9BE28935FEE04d6F6));

        _isSniper[address(0x000000917de6037d52b1F0a306eeCD208405f7cd)] = true;
        _confirmedSnipers.push(address(0x000000917de6037d52b1F0a306eeCD208405f7cd));

        _isSniper[address(0x7100e690554B1c2FD01E8648db88bE235C1E6514)] = true;
        _confirmedSnipers.push(address(0x7100e690554B1c2FD01E8648db88bE235C1E6514));

        _isSniper[address(0x72b30cDc1583224381132D379A052A6B10725415)] = true;
        _confirmedSnipers.push(address(0x72b30cDc1583224381132D379A052A6B10725415));

        _isSniper[address(0x9eDD647D7d6Eceae6bB61D7785Ef66c5055A9bEE)] = true;
        _confirmedSnipers.push(address(0x9eDD647D7d6Eceae6bB61D7785Ef66c5055A9bEE));

        _isSniper[address(0xfe9d99ef02E905127239E85A611c29ad32c31c2F)] = true;
        _confirmedSnipers.push(address(0xfe9d99ef02E905127239E85A611c29ad32c31c2F));

        _isSniper[address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b)] = true;
        _confirmedSnipers.push(address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b));

        _isSniper[address(0xc496D84215d5018f6F53E7F6f12E45c9b5e8e8A9)] = true;
        _confirmedSnipers.push(address(0xc496D84215d5018f6F53E7F6f12E45c9b5e8e8A9));

        _isSniper[address(0x59341Bc6b4f3Ace878574b05914f43309dd678c7)] = true;
        _confirmedSnipers.push(address(0x59341Bc6b4f3Ace878574b05914f43309dd678c7));

        _isSniper[address(0xe986d48EfeE9ec1B8F66CD0b0aE8e3D18F091bDF)] = true;
        _confirmedSnipers.push(address(0xe986d48EfeE9ec1B8F66CD0b0aE8e3D18F091bDF));

        _isSniper[address(0x4aEB32e16DcaC00B092596ADc6CD4955EfdEE290)] = true;
        _confirmedSnipers.push(address(0x4aEB32e16DcaC00B092596ADc6CD4955EfdEE290));

        _isSniper[address(0x136F4B5b6A306091b280E3F251fa0E21b1280Cd5)] = true;
        _confirmedSnipers.push(address(0x136F4B5b6A306091b280E3F251fa0E21b1280Cd5));

        _isSniper[address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b)] = true;
        _confirmedSnipers.push(address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b));

        _isSniper[address(0x5B83A351500B631cc2a20a665ee17f0dC66e3dB7)] = true;
        _confirmedSnipers.push(address(0x5B83A351500B631cc2a20a665ee17f0dC66e3dB7));

        _isSniper[address(0xbCb05a3F85d34f0194C70d5914d5C4E28f11Cc02)] = true;
        _confirmedSnipers.push(address(0xbCb05a3F85d34f0194C70d5914d5C4E28f11Cc02));

        _isSniper[address(0x22246F9BCa9921Bfa9A3f8df5baBc5Bc8ee73850)] = true;
        _confirmedSnipers.push(address(0x22246F9BCa9921Bfa9A3f8df5baBc5Bc8ee73850));

        _isSniper[address(0x42d4C197036BD9984cA652303e07dD29fA6bdB37)] = true;
        _confirmedSnipers.push(address(0x42d4C197036BD9984cA652303e07dD29fA6bdB37));

        _isSniper[address(0x00000000003b3cc22aF3aE1EAc0440BcEe416B40)] = true;
        _confirmedSnipers.push(address(0x00000000003b3cc22aF3aE1EAc0440BcEe416B40));

        _isSniper[address(0x231DC6af3C66741f6Cf618884B953DF0e83C1A2A)] = true;
        _confirmedSnipers.push(address(0x231DC6af3C66741f6Cf618884B953DF0e83C1A2A));

        _isSniper[address(0xC6bF34596f74eb22e066a878848DfB9fC1CF4C65)] = true;
        _confirmedSnipers.push(address(0xC6bF34596f74eb22e066a878848DfB9fC1CF4C65));

        _isSniper[address(0x20f6fCd6B8813c4f98c0fFbD88C87c0255040Aa3)] = true;
        _confirmedSnipers.push(address(0x20f6fCd6B8813c4f98c0fFbD88C87c0255040Aa3));

        _isSniper[address(0xD334C5392eD4863C81576422B968C6FB90EE9f79)] = true;
        _confirmedSnipers.push(address(0xD334C5392eD4863C81576422B968C6FB90EE9f79));

        _isSniper[address(0xFFFFF6E70842330948Ca47254F2bE673B1cb0dB7)] = true;
        _confirmedSnipers.push(address(0xFFFFF6E70842330948Ca47254F2bE673B1cb0dB7));

        _isSniper[address(0xA39C50bf86e15391180240938F469a7bF4fDAe9a)] = true;
        _confirmedSnipers.push(address(0xA39C50bf86e15391180240938F469a7bF4fDAe9a));

        _isSniper[address(0xA39C50bf86e15391180240938F469a7bF4fDAe9a)] = true;
        _confirmedSnipers.push(address(0xA39C50bf86e15391180240938F469a7bF4fDAe9a));

        teamDevAddress = payable(0x30aCE2D90Fa3C4A34761f3641D150F177daC9CDA);
    }

    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 _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 isRemovedSniper(address account) public view returns (bool) {
        return _isSniper[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 sender,
        address recipient,
        uint256 amount
    ) private {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        require(!_isSniper[recipient], "You have no power here!");
        require(!_isSniper[msg.sender], "You have no power here!");


        if(sender != owner() && recipient != owner()) {
            
            if (!tradingOpen) {
                if (!(sender == address(this) || recipient == address(this)
                || sender == address(owner()) || recipient == address(owner()))) {
                    require(tradingOpen, "Trading is not enabled");
                }
            }

            if(_cooldownEnabled) {
                if(!cooldown[msg.sender].exists) {
                    cooldown[msg.sender] = User(0,0,true);
                }
            }
        }
        
        //buy
        
        if(sender == uniswapV2Pair && recipient != address(uniswapV2Router) && !_isExcludedFromFee[recipient]) {
                require(tradingOpen, "Trading not yet enabled.");
                
                _liquidityFee=_baseLiqFee;
                
                if(_cooldownEnabled) {
                    if(buyLimitEnd > block.timestamp) {
                        require(amount <= _maxBuyAmount);
                        require(cooldown[recipient].buy < block.timestamp, "Your buy cooldown has not expired.");
                        cooldown[recipient].buy = block.timestamp + (45 seconds);
                    }
                }
                if(_cooldownEnabled) {
                    cooldown[recipient].sell = block.timestamp + (15 seconds);
                }
        }

        //sell
        if (!inSwapAndLiquify && swapAndLiquifyEnabled && recipient == uniswapV2Pair) {
            
            //get dynamic fee
            if(_useImpactFeeSetter) {
                    uint256 feeBasis = amount.mul(_feeMultiplier);
                    feeBasis = feeBasis.div(balanceOf(uniswapV2Pair).add(amount));
                    setFee(feeBasis);
            }
            
            uint256 dynamicFee = _liquidityFee;
            
            //swap contract's tokens for ETH
            uint256 contractTokenBalance = balanceOf(address(this));
             if(contractTokenBalance > 0) {
                swapTokens(contractTokenBalance);
            }
            
            //buyback
            uint256 balance = address(this).balance;
            
            //buyback only if sell amount >= _minTrigger
            if (buyBackEnabled && amount >= _minTrigger) {
                
                uint256 ten = 10;
                
                uint256 buyBackAmount = _baseAmount.mul(ten.add(((dynamicFee.sub(_baseLiqFee)).mul(k)).div(_baseLiqFee))).div(10);                                                

                if (balance >= buyBackAmount)   buyBackTokens(buyBackAmount);
            }
            
            //restore dynamicFee after buyback
            _liquidityFee = dynamicFee;
        }

        bool takeFee = true;

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

        //execute transfer
        _tokenTransfer(sender, recipient,amount,takeFee);
    }

    function swapTokens(uint256 contractTokenBalance) private lockTheSwap {

        uint256 initialBalance = address(this).balance;
        swapTokensForEth(contractTokenBalance);
        uint256 transferredBalance = address(this).balance.sub(initialBalance);
 
        transferToAddressETH(teamDevAddress, transferredBalance.div(2));

    }


    function buyBackTokens(uint256 amount) private lockTheSwap {
        if (amount > 0) {
            swapETHForTokens(amount);
        }
    }
    
    function setFee(uint256 impactFee) private {
        uint256 _impactFee = _baseLiqFee;
        if(impactFee < _baseLiqFee) {
            _impactFee = _baseLiqFee;
        } else if(impactFee > 40) {
            _impactFee = 40;
        } else {
            _impactFee = impactFee;
        }
        if(_impactFee.mod(2) != 0) {
            _impactFee++;
        }
        
        _liquidityFee = _impactFee;
    }

    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 swapETHForTokens(uint256 amount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = uniswapV2Router.WETH();
        path[1] = address(this);

        // make the swap
        uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0, // accept any amount of Tokens
            path,
            deadAddress, // Burn address
            block.timestamp.add(300)
        );

        emit SwapETHForTokens(amount, path);
    }

    function addLiquidity(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
            owner(),
            block.timestamp
        );
    }

    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]) {
            _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 _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).div(
            10**2
        );
    }

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

        _previousTaxFee = _taxFee;
        _previousLiquidityFee = _liquidityFee;

        _taxFee = 0;
        _liquidityFee = 0;
    }

    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _liquidityFee = _previousLiquidityFee;
    }

    function isExcludedFromFee(address account) public view returns(bool) {
        return _isExcludedFromFee[account];
    }


    function setTeamDevAddress(address _teamDevAddress) external onlyOwner() {
        teamDevAddress = payable(_teamDevAddress);
    }

    

    function setBuyBackEnabled(bool _enabled) public onlyOwner {
        buyBackEnabled = _enabled;
        emit BuyBackEnabledUpdated(_enabled);
    }

    function transferToAddressETH(address payable recipient, uint256 amount) private {
        recipient.transfer(amount);
    }

    
    function setMinTrigger(uint256 newTrigger) external onlyOwner() {
        _minTrigger= newTrigger;
    }
    
    function setK (uint256 newK) external onlyOwner() {
        k = newK;
    }

    function setBaseAmount(uint256 baseAmount) external onlyOwner() {
            _baseAmount=baseAmount;
    }
    
    
     function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
        require((_baseLiqFee+taxFee)<=20); 
        _taxFee = taxFee;
        _previousTaxFee=taxFee;
    }
    
    function setBaseLiqFeePercent(uint256 baseLiqFee) external onlyOwner() {
        require((baseLiqFee+_taxFee)<=20); 
        _baseLiqFee = baseLiqFee;
    }

    //to recieve ETH from uniswapV2Router when swapping
    receive() external payable {}
}
receive() external payable {}
//to recieve ETH from uniswapV2Router when swapping