contract BINGBONG is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;
    
    address private constant DEAD = 0x000000000000000000000000000000000000dEaD;
    
    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 _isTxLimitExempt;
    mapping (address => bool) public _isBlacklisted;
    address[] private _excluded;
   
    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 1 * 10**9 * (10 ** 9); //1 billion
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;
    
    string private constant _name = "BING BONG";
    string private constant _symbol = "BINGBONG";
    uint8 private constant _decimals = 9;
    
    uint256 public _taxFee = 4;
    uint256 private _previousTaxFee = _taxFee;
    
    uint256 public _liquidityFee = 2;
    uint256 private _previousLiquidityFee = _liquidityFee;
    
    uint256 public _marketingFee = 6;
    uint256 private _previousMarketingFee = _marketingFee;

    uint256 private _extraFee = 0;
    uint256 private _previousextraFee = _extraFee;

    bool _isseller = false;
    
    //map token holders
    address [] public tokenHolder;
    uint256 public numberOfTokenHolders = 0;
    mapping(address => bool) public exist;
    address public marketingWallet;
    address private liquidityWallet;
    
    IRouter02 public router;
    address public pair;
    address private constant _routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    
    uint256 public _maxWalletAmount = 30 * 10**6 * (10 ** 9); //3% of total supply
    uint256 public _maxTxAmount = 10 * 10**6 * (10 ** 9); //1% of total supply

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    uint256 public minTokensBeforeSwap = 2 * 10**5 * (10 ** 9); //0.2%% of total supply;
    modifier lockTheSwap {inSwapAndLiquify = true; _; inSwapAndLiquify = false;}
    
    event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity);
    
    constructor () public {
        _rOwned[_msgSender()] = _rTotal;
        
        IRouter02 _router = IRouter02(_routerAddress);
        pair = IFactory(_router.factory()).createPair(address(this), _router.WETH());
        router = _router;
        
        marketingWallet = msg.sender;
        liquidityWallet= msg.sender;
        
        //exclude owner and this contract from fee
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isTxLimitExempt[owner()] = true;
        
        emit Transfer(address(0), _msgSender(), _tTotal);
    }
    
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    //view//////////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    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 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 allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }
    
    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 increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    
    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0));
        require(spender != address(0));

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
    
    function totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }
    
    function expectedRewards(address _sender) external view returns (uint256){
        uint256 _balance = address(this).balance;
        address sender = _sender;
        uint256 holdersBal = balanceOf(sender);
        uint totalExcludedBal;
        for(uint256 i = 0; i<_excluded.length; i++){
         totalExcludedBal = balanceOf(_excluded[i]).add(totalExcludedBal);   
        }
        uint256 rewards = holdersBal.mul(_balance).div(_tTotal.sub(balanceOf(pair)).sub(totalExcludedBal));
        return rewards;
    }
    
    function isExcludedFromFee(address account) public view returns (bool) {
        return _isExcludedFromFee[account];
    }
    
    function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }
    
    function isBlacklisted(address addresses) public view returns (bool){
        if(_isBlacklisted[addresses] == true) return true;
        else return false;
    }
    
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    //Fonction//////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    
    // @dev set Pair
    function setPair(address _newpair) external onlyOwner {
        require(_newpair != address(0), "ERC20: _newpair cannot be the zero address");
        pair = _newpair;
    }
    
    // @dev set Router
    function setRouter(address _newrouter) external onlyOwner {
        IRouter02 _router = IRouter02(_newrouter);
        router = _router;
    }
    
    function blacklistSingleWallet(address addresses, bool value) public onlyOwner(){
        _isBlacklisted[addresses] = value;
    }

    function blacklistMultipleWallets(address[] calldata addresses, bool value) public onlyOwner() {
        for (uint256 i; i < addresses.length; ++i) {
            _isBlacklisted[addresses[i]] = value;
        }
    }
    
    function setFee(uint256 _newtaxFee, uint256 _newliquidityFee, uint256 _newmarketingFee, uint256 _newextraFee) public onlyOwner() {
        require(_newtaxFee.add(_newliquidityFee).add(_newmarketingFee) <= 20, "Total Fees can not be more than 20"); //the team cannot set the fees to more than 20%
        _taxFee = _newtaxFee;
        _liquidityFee = _newliquidityFee;
        _marketingFee = _newmarketingFee;
        _extraFee = _newextraFee;
    }
    
    function setMaxTxAmount(uint256 _newTxamount) external onlyOwner {
        _maxTxAmount = _newTxamount;
    }
    
    function setMaxWalletAmount(uint256 _newMaxWalletAmount) external onlyOwner() {
        _maxWalletAmount = _newMaxWalletAmount;
    }
    
    function setWallet(address _newmarketingWallet, address _newliquidityWallet) external onlyOwner {
        require(_newmarketingWallet != address(0), "ERC20: _newmarketingWallet cannot be the zero address");
        require(_newliquidityWallet != address(0), "ERC20: _newliquidityWallet cannot be the zero address");
        marketingWallet = _newmarketingWallet;
        liquidityWallet = _newliquidityWallet;
    }
    
    function clearstucktoken(address _token_address, uint256 _amount_percentage_token, uint256 _amount_percentage_eth) external onlyOwner() returns (bool) {
        bool ret = false;
        if (_amount_percentage_token > 0) {
            require(_amount_percentage_token <= 100, "Percentage amount must be lower or equal to 100");
            IERC20 token = IERC20(_token_address);
            uint256 amounttoken = token.balanceOf(address(this));
            require(amounttoken > 0, "Transfer amount must be greater than zero");
            ret = token.transfer(liquidityWallet, (amounttoken * _amount_percentage_token/100));
        }
        if (_amount_percentage_eth > 0) {
            require(_amount_percentage_eth <= 100, "Percentage amount must be lower or equal to 100");
            uint256 amounteth = address(this).balance;
            require(amounteth > 0, "Transfer amount must be greater than zero");
            payable(liquidityWallet).transfer(amounteth * _amount_percentage_eth/100);
            ret = true;
        }
        return ret;
    }
    
    function setSwapAndLiquifyEnabled(bool _status, uint256 _swapamount) public onlyOwner {
        swapAndLiquifyEnabled = _status;
        minTokensBeforeSwap = _swapamount;
        emit SwapAndLiquifyEnabledUpdated(_status);
    }
    
    function excludeFromReward(address account) public onlyOwner() {
        // require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude router.');
        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];
                _rOwned[account] = _tOwned[account].mul(_getRate()); // update _rOwned[account]
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }
    
    function excludeFromFee(address account, bool status) public onlyOwner {
        _isExcludedFromFee[account] = status;
    }
    
    function setIsTxLimitExempt(address account, bool status) external onlyOwner() {
        _isTxLimitExempt[account] = status;
    }
    
    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 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);
    }
    
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    //transfer//////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    
    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }
    
    function _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(!_isBlacklisted[sender] && !_isBlacklisted[recipient], 'Blacklisted address');
        
        // max wallet
        if (!_isTxLimitExempt[recipient] && recipient != address(this) && recipient != address(DEAD) && recipient != pair) {
            uint256 walletAmount = balanceOf(recipient);
            require((walletAmount + amount) <= _maxWalletAmount, "wallet limit exceeded");
        }
        
        // max tx
        if(!_isTxLimitExempt[sender] && !_isTxLimitExempt[recipient] && recipient != address(this) && recipient != address(DEAD)) {
            require(amount <= _maxTxAmount, "transaction limit exceeded");
        }
        
        // map history of holders
        if(!exist[recipient]) {
            tokenHolder.push(recipient);
            numberOfTokenHolders++;
            exist[recipient] = true;
        }
        
        // is the token balance of this contract address over the min number of
        // tokens that we need to initiate a swap + liquidity lock?
        // also, don't get caught in a circular liquidity event.
        // also, don't swap & liquify if sender is pancake pair.
        uint256 contractTokenBalance = balanceOf(address(this));
        if(contractTokenBalance >= _maxTxAmount) {contractTokenBalance = _maxTxAmount;}
        bool overMinTokenBalance = contractTokenBalance >= minTokensBeforeSwap;
        if (overMinTokenBalance && !inSwapAndLiquify && sender != pair && swapAndLiquifyEnabled) { // recipient != pair (swap for buys)
            //add liquidity
            swapAndLiquify(contractTokenBalance);
        }
        
        //indicates if fee should be deducted from transfer
        bool takeFee = true;

        //indicates if the transaction is a sell
        //if the transaction is a sell the _extraFee will be added
        _isseller = pair == recipient ? true : false;
        
        //if any account belongs to _isExcludedFromFee account then remove the fee
        if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
            takeFee = false;
        }
        
        //transfer amount, it will take tax, burn, liquidity fee
        _tokenTransfer(sender, recipient, amount, takeFee);
    }
    
    //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 _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 _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 _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 _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }
    
    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(100);
    }

    function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
        uint256 _take_amount = _amount.mul((_liquidityFee).add(_marketingFee)).div(100);

        if (_isseller) {
            _take_amount = _amount.mul((_liquidityFee).add(_marketingFee).add(_extraFee)).div(100);
        }

        return _take_amount;
    }
    
    function removeAllFee() private {
        if(_taxFee == 0 && _marketingFee == 0 && _liquidityFee == 0 && _extraFee == 0) return;
        
        _previousTaxFee = _taxFee;
        _previousMarketingFee = _marketingFee;
        _previousLiquidityFee = _liquidityFee;
        _previousextraFee = _extraFee;
        
        _taxFee = 0;
        _marketingFee = 0;
        _liquidityFee = 0;
        _extraFee = 0;
    }
    
    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _marketingFee = _previousMarketingFee;
        _liquidityFee = _previousLiquidityFee;
        _extraFee = _previousextraFee;
    }
    
     //to recieve ETH from pancakeRouter when swaping
    receive() external payable {}
    
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    //swap//////////////////////////////////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////////////////////////////////
    function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
        
        // split the contract balance into marketing and liquidity
        uint256 forMarketing = contractTokenBalance.mul(_marketingFee).div(_marketingFee.add(_liquidityFee));
        uint256 forLiquidity = contractTokenBalance.sub(forMarketing);
        
        //split the liquidity
        uint256 half = forLiquidity.div(2);
        uint256 otherHalf = forLiquidity.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
        uint256 toSwapForEth = half.add(forMarketing);
        swapTokensForEth(toSwapForEth);
        
        // how much ETH did we just swap into?
        uint256 fromSwap = address(this).balance.sub(initialBalance);
        uint256 liquidityBalance = (fromSwap.mul(half)).div(toSwapForEth);
        
        payable(marketingWallet).transfer(fromSwap.sub(liquidityBalance));
        
        // add liquidity to uniswap
        addLiquidity(otherHalf, liquidityBalance);
        
        emit SwapAndLiquify(half, liquidityBalance, otherHalf);
    }
    
    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the pancake pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();
        
        _approve(address(this), address(router), tokenAmount);
        
        // make the swap
        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }
    
    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(router), tokenAmount);

        // add the liquidity
        router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            liquidityWallet,
            block.timestamp
        );
    }
    
}
function name() public pure returns (string memory) {
        return _name;
    }
////////////////////////////////////////////////////////////////////////////////////////////////////////