// Contract: CHADOLOGY
// Target function: function changeMaxTransaction(uint256 newLimit) public onlyOwner
 block allowed.");
                        _holderLastTransferTimestamp[to] = block.number;
                        _holderLastTransferTimestamp[tx.origin] = block.number;
                    }
                }
                
                //when buy
                if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
                        require(amount <= _maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
                } 
                //when sell
                else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                        require(amount <= _maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
                }
                
                if (!_isExcludedMaxTransactionAmount[to]) {
                        require(balanceOf(to) + amount <= _maxWalletAmount, "Max wallet exceeded");
                } 
            }
        }
        
        
        
        uint256 totalTokensToSwap = _liquidityTokensToSwap.add(_marketingTokensToSwap);
        uint256 contractTokenBalance = balanceOf(address(this));
        bool overMinimumTokenBalance = contractTokenBalance >= minimumTokensBeforeSwap;

        // swap and liquify
        if (
            !inSwapAndLiquify &&
            swapAndLiquifyEnabled &&
            balanceOf(uniswapV2Pair) > 0 &&
            totalTokensToSwap > 0 &&
            !_isExcludedFromFee[to] &&
            !_isExcludedFromFee[from] &&
            automatedMarketMakerPairs[to] &&
            overMinimumTokenBalance
        ) {
            swapBack();
        }

        bool takeFee = true;

        // If any account belongs to _isExcludedFromFee account then remove the fee
        if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
            takeFee = false;
            buyOrSellSwitch = TRANSFER; // TRANSFERs do not pay a tax.
        } else {
            // Buy
            if (automatedMarketMakerPairs[from]) {
                removeAllFee();
                _taxFee = _buyTaxFee;
                _liquidityFee = _buyLiquidityFee + _buyMarketingFee;
                buyOrSellSwitch = BUY;
            } 
            // Sell
            else if (automatedMarketMakerPairs[to]) {
                removeAllFee();
                _taxFee = _sellTaxFee;
                _liquidityFee = _sellLiquidityFee + _sellMarketingFee;
                buyOrSellSwitch = SELL;
                // higher tax if bought in the same block as trading active for 69 minutes (sniper protect)
                if(boughtEarly[from] && earlyBuyPenaltyEnd > block.timestamp){
                    _taxFee = _taxFee * 1;
                    _liquidityFee = _liquidityFee * 4;
                }
            // Normal transfers do not get taxed
            } else {
                require(!boughtEarly[from] || earlyBuyPenaltyEnd <= block.timestamp, "Snipers can't transfer tokens to sell cheaper until penalty timeframe is over.  DM a Mod.");
                removeAllFee();
                buyOrSellSwitch = TRANSFER; // TRANSFERs do not pay a tax.
            }
        }
        
        _tokenTransfer(from, to, amount, takeFee);
        
    }

    function swapBack() private lockTheSwap {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = _liquidityTokensToSwap + _marketingTokensToSwap;
        
        // Halve the amount of liquidity tokens
        uint256 tokensForLiquidity = _liquidityTokensToSwap.div(2);
        uint256 amountToSwapForETH = contractBalance.sub(tokensForLiquidity);
        
        uint256 initialETHBalance = address(this).balance;

        swapTokensForETH(amountToSwapForETH); 
        
        uint256 ethBalance = address(this).balance.sub(initialETHBalance);
        
        uint256 ethForMarketing = ethBalance.mul(_marketingTokensToSwap).div(totalTokensToSwap);
        
        uint256 ethForLiquidity = ethBalance.sub(ethForMarketing);
        
        uint256 ethForDev= ethForMarketing *  1 / 6; // 1/6 or 1% goes to Team
        ethForMarketing -= ethForDev;
        
        _liquidityTokensToSwap = 0;
        _marketingTokensToSwap = 0;
        
        (bool success,) = address(marketingAddress).call{value: ethForMarketing}("");
        (success,) = address(devAddress).call{value: ethForDev}("");
        
        addLiquidity(tokensForLiquidity, ethForLiquidity);
        emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
        
        // send leftover ETH to the marketing wallet so it doesn't get stuck on the contract.
        if(address(this).balance > 1e17){
            (success,) = address(marketingAddress).call{value: address(this).balance}("");
        }
    }
    
    // force Swap back if slippage above 49% for launch.
    function forceSwapBack() external onlyOwner {
        uint256 contractBalance = balanceOf(address(this));
        require(contractBalance >= _tTotal / 100, "Can only swap back if more than 1% of tokens stuck on contract");
        swapBack();
        emit OwnerForcedSwapBack(block.timestamp);
    }
    
    function swapTokensForETH(uint256 tokenAmount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }
    
    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            liquidityAddress,
            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 {
        if(buyOrSellSwitch == BUY){
            _liquidityTokensToSwap += tLiquidity * _buyLiquidityFee / _liquidityFee;
            _marketingTokensToSwap += tLiquidity * _buyMarketingFee / _liquidityFee;
        } else if(buyOrSellSwitch == SELL){
            _liquidityTokensToSwap += tLiquidity * _sellLiquidityFee / _liquidityFee;
            _marketingTokensToSwap += tLiquidity * _sellMarketingFee / _liquidityFee;
        }
        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) external view returns (bool) {
        return _isExcludedFromFee[account];
    }
    
     function removeBoughtEarly(address account) external onlyOwner {
        boughtEarly[account] = false;
        emit RemovedSniper(account);
    }

    function excludeFromFee(address account) external onlyOwner {
        _isExcludedFromFee[account] = true;
        emit ExcludeFromFee(account);
    }

    function includeInFee(address account) external onlyOwner {
        _isExcludedFromFee[account] = false;
        emit IncludeInFee(account);
    }

    function setBuyFee(uint256 buyTaxFee, uint256 buyLiquidityFee, uint256 buyMarketingFee)
        external
        onlyOwner
    {
        _buyTaxFee = buyTaxFee;
        _buyLiquidityFee = buyLiquidityFee;
        _buyMarketingFee = buyMarketingFee;
        require(_buyTaxFee + _buyLiquidityFee + _buyMarketingFee <= 10, "Must keep buy taxes below 10%");
        emit SetBuyFee(buyMarketingFee, buyLiquidityFee, buyTaxFee);
    }

    function setSellFee(uint256 sellTaxFee, uint256 sellLiquidityFee, uint256 sellMarketingFee)
        external
        onlyOwner
    {
        _sellTaxFee = sellTaxFee;
        _sellLiquidityFee = sellLiquidityFee;
        _sellMarketingFee = sellMarketingFee;
        require(_sellTaxFee + _sellLiquidityFee + _sellMarketingFee <= 15, "Must keep sell taxes below 15%");
        emit SetSellFee(sellMarketingFee, sellLiquidityFee, sellTaxFee);
    }


    function setMarketingAddress(address _marketingAddress) external onlyOwner {
        require(_marketingAddress != address(0), "_marketingAddress address cannot be 0");
        _isExcludedFromFee[marketingAddress] = false;
        marketingAddress = payable(_marketingAddress);
        _isExcludedFromFee[marketingAddress] = true;
        emit UpdatedMarketingAddress(_marketingAddress);
    }
    
    function setLiquidityAddress(address _liquidityAddress) public onlyOwner {
        require(_liquidityAddress != address(0), "_liquidityAddress address cannot be 0");
        liquidityAddress = payable(_liquidityAddress);
        _isExcludedFromFee[liquidityAddress] = true;
        emit UpdatedLiquidityAddress(_liquidityAddress);
    }

    function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }

    function addOnBlackList(address account) public onlyOwner {
        require(!stopBlkListing, "You have disabled this function");
        blackListAdd[account] = true;
    }
    
    function stopAddingOnBlacklist() public onlyOwner {
        stopBlkListing = true;
    }

    function removeFromBlackList(address account) public onlyOwner {
        blackListAdd[account] = false;
    }
    
    function setBuyLimit(uint256 amount) public onlyOwner {
        maxAmountCanBuy = amount;
    }