// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value    );
}

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

library Address {
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            codehash := extcodehash(account)
        }
        return (codehash != accountHash && codehash != 0x0);
    }

    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    function functionCall(address target, bytes memory data,string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target,data,value, "Address: low-level call with value failed");
    }

    function functionCallWithValue(address target, bytes memory data, uint256 value,string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue,string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: weiValue}(data);
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) {
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    uint256 private _lockTime;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() external virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function transferOwnership(address newOwner) external virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    function getUnlockTime() public view returns (uint256) {
        return _lockTime;
    }

    function getTime() public view returns (uint256) {
        return block.timestamp;
    }
}


interface IUniswapV2Factory {
    event PairCreated( address indexed token0, address indexed token1, address pair, uint256);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);
    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint256) external view returns (address pair);
    function allPairsLength() external view returns (uint256);
    function createPair(address tokenA, address tokenB) external returns (address pair);
    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}


interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint256);
    function balanceOf(address owner) external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function transfer(address to, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint256);
    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Burn(address indexed sender, uint256 amount0, uint256 amount1, address indexed to);
    event Swap(address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, address indexed to);
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint256);
    function price1CumulativeLast() external view returns (uint256);
    function kLast() external view returns (uint256);

    function burn(address to) external returns (uint256 amount0, uint256 amount1);
    function swap(uint256 amount0Out, uint256 amount1Out, address to, bytes calldata data) external;

    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline) 
    external returns (uint256 amountA, uint256 amountB, uint256 liquidity);

    function addLiquidityETH(address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline) 
    external payable returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);

    function removeLiquidity(address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline) 
    external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETH(address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline) 
    external returns (uint256 amountToken, uint256 amountETH);

    function removeLiquidityWithPermit(address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s) 
    external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETHWithPermit(address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s) 
    external returns (uint256 amountToken, uint256 amountETH);

    function swapExactTokensForTokens(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) 
    external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline) 
    external returns (uint256[] memory amounts);

    function swapExactETHForTokens(uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) 
    external payable returns (uint256[] memory amounts);

    function swapTokensForExactETH(uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline) 
    external returns (uint256[] memory amounts);

    function swapExactTokensForETH(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) 
    external returns (uint256[] memory amounts);

    function swapETHForExactTokens(uint256 amountOut, address[] calldata path, address to, uint256 deadline) 
    external payable returns (uint256[] memory amounts);

    function quote(uint256 amountA, uint256 reserveA, uint256 reserveB) 
    external pure returns (uint256 amountB);

    function getAmountOut(uint256 amountIn, uint256 reserveIn, uint256 reserveOut)
    external pure returns (uint256 amountOut);

    function getAmountIn(uint256 amountOut, uint256 reserveIn, uint256 reserveOut) 
    external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);
    function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline) external returns (uint256 amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s) external returns (uint256 amountETH);
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external;
}

contract TheProfessor is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    address payable public marketingAddress = payable(0x7275454b86923A1794F3Fcf38AB71DF446FB8fef);    
    address payable public teamAddress = payable(0x7275454b86923A1794F3Fcf38AB71DF446FB8fef);   
    address payable private ownerAddress = payable(0x7275454b86923A1794F3Fcf38AB71DF446FB8fef);    
    address payable liquidityAddress = payable(msg.sender);         
    address public immutable deadAddress = 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;
    address[] private _excluded;
    
    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 1 * 1e9 * 1e18;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    bool public limitsInEffect = false;
    
    string private constant _name = "The Professor";
    string private constant _symbol = "TheProfessor";
    
    uint8 private constant _decimals = 18;
    
    uint256 private constant BUY = 1;
    uint256 private constant SELL = 2;
    uint256 private constant TRANSFER = 3;
    uint256 private buyOrSellSwitch;

    // these values are pretty much arbitrary since they get overwritten for every txn, but the placeholders make it easier to work with current contract.
    uint256 private _taxFee;
    uint256 private _previousTaxFee = _taxFee;

    uint256 private _liquidityFee;
    uint256 private _previousLiquidityFee = _liquidityFee;

    uint256 public _buyMarketingFee = 4;
    uint256 public _buyTaxFee = 6;
    uint256 public _buyLiquidityFee = 2;
    uint256 public _buyTeamFee = 2;

    // This will be adjust to avoid dump in the first few minutes
    uint256 public _sellMarketingFee = 6;
    uint256 public _sellTaxFee = 12;
    uint256 public _sellLiquidityFee = 2;
    uint256 public _sellTeamFee = 2;
    
    uint256 public tradingActiveBlock = 0; // 0 means trading is not active
    mapping(address => bool) public boughtEarly;
    uint256 public earlyBuyPenaltyEnd; // determines when snipers/bots can sell without extra penalty
    
    uint256 private _liquidityTokensToSwap;
    uint256 private _marketingTokensToSwap;
    uint256 private _teamTokensToSwap;
    
    bool private gasLimitActive = false;
    uint256 private gasPriceLimit = 100 * 1 gwei; 
    uint256 private gasMaxLimit = 50000000; // gasLeft limit
    
    uint256 public maxTransactionAmount;
    mapping (address => bool) public _isExcludedMaxTransactionAmount;
    
    // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
    // could be subject to a maximum transfer amount
    mapping (address => bool) public automatedMarketMakerPairs;

    uint256 private minimumTokensBeforeSwap = _tTotal * 5 / 10000; // 0.05%

    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = false;
    bool public tradingActive = false;

    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiquidity);
    event SwapETHForTokens(uint256 amountIn, address[] path);
    event SwapTokensForETH(uint256 amountIn, address[] path);    
    event SetAutomatedMarketMakerPair(address pair, bool value);    
    event ExcludeFromReward(address excludedAddress);    
    event IncludeInReward(address includedAddress);    
    event ExcludeFromFee(address excludedAddress);    
    event IncludeInFee(address includedAddress);    
    event SetBuyFee(uint256 marketingFee, uint256 liquidityFee, uint256 reflectFee, uint256 buybackFee);    
    event SetSellFee(uint256 marketingFee, uint256 liquidityFee, uint256 reflectFee, uint256 buybackFee);    
    event TransferForeignToken(address token, uint256 amount);    
    event UpdatedMarketingAddress(address marketing);    
    event UpdatedLiquidityAddress(address liquidity);    
    event UpdatedTeamAddress(address buyback);    
    event OwnerForcedSwapBack(uint256 timestamp);    
    event BoughtEarly(address indexed sniper);    
    event RemovedSniper(address indexed notsnipersupposedly);
    event UpdatedRouter(address indexed newrouter);

    modifier lockTheSwap() {
        inSwapAndLiquify = true; _; inSwapAndLiquify = false;
    }

    constructor() {
        _rOwned[_msgSender()] = _rTotal;        
        
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH()); 
        
        _setAutomatedMarketMakerPair(uniswapV2Pair, true);
        
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[marketingAddress] = true;
        _isExcludedFromFee[liquidityAddress] = true;
        
        excludeFromMaxTransaction(owner(), true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(address(0xdead), true);
 
        tradingActive = true;
        swapAndLiquifyEnabled = true;
        
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() external pure returns (string memory) {
        return _name;
    }

    function symbol() external pure returns (string memory) {
        return _symbol;
    }

    function decimals() external pure returns (uint8) {
        return _decimals;
    }

    function totalSupply() external pure 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) external override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) external view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) external override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) external 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) external virtual returns (bool) {
        _approve(_msgSender(),spender,_allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

     function clearStuckBalance(uint256 amountPercentage) external onlyOwner {
        uint256 amount = address(this).balance;
        payable(msg.sender).transfer(amount * amountPercentage / 100);
    }
    
    function decreaseAllowance(address spender, uint256 subtractedValue) external virtual returns (bool) {
        _approve(_msgSender(),spender,_allowances[_msgSender()][spender].sub(subtractedValue,"ERC20: decreased allowance below zero"));
        return true;
    }

    function isExcludedFromReward(address account) external view returns (bool) {
        return _isExcluded[account];
    }

    function totalFees() external view returns (uint256) {
        return _tFeeTotal;
    } 
    
    function minimumTokensBeforeSwapAmount() external view returns (uint256) {
        return minimumTokensBeforeSwap;
    }
    
    function setminimumTokensBeforeSwapAmount(uint256 ratio) external onlyOwner() {
        minimumTokensBeforeSwap = _tTotal * ratio / 10000;
    }
    
    function setAutomatedMarketMakerPair(address pair, bool value) external onlyOwner {
        require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;
        excludeFromMaxTransaction(pair, value);
        if(value){excludeFromReward(pair);}
        if(!value){includeInReward(pair);}
        emit SetAutomatedMarketMakerPair(pair, value);
    }
    
    function setProtectionSettings(bool antiGas) external onlyOwner() {
        gasLimitActive = antiGas;
    }
    
    function setGasPriceLimit(uint256 gas) external onlyOwner {
        require(gas >= 75);
        gasPriceLimit = gas * 1 gwei;
    }
    
    function setGasMaxLimit(uint256 gas) external onlyOwner {
        require(gas >= 750000);
        gasMaxLimit = gas * gasPriceLimit;
    }
    
    // remove limits after token is stable - 30-60 minutes
    function removeLimits() external onlyOwner returns (bool){
        limitsInEffect = false;
        gasLimitActive = false;
        return true;
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee) external view returns (uint256) {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount, , , , , ) = _getValues(tAmount);
            return rAmount;
        } else {
            (, uint256 rTransferAmount, , , , ) = _getValues(tAmount);
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount) public view returns (uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner {
        require(!_isExcluded[account], "Account is already excluded");
        require(_excluded.length + 1 <= 50, "Cannot exclude more than 50 accounts.  Include a previously excluded address.");
        if (_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function includeInReward(address account) public onlyOwner {
        require(_isExcluded[account], "Account is not 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 excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
        _isExcludedMaxTransactionAmount[updAds] = isEx;
    }
 
    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        
        if(!tradingActive){
            require(_isExcludedFromFee[from] || _isExcludedFromFee[to], "Trading is not active yet.");
        }
        
        if(limitsInEffect){
            if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !inSwapAndLiquify) {
                
                if(from != owner() && to != uniswapV2Pair && block.number == tradingActiveBlock) {
                    boughtEarly[to] = true;
                    emit BoughtEarly(to);
                }
                
                if (gasLimitActive && automatedMarketMakerPairs[from]) {
                    require(tx.gasprice <= gasPriceLimit, "Gas price exceeds limit.");
                }

                //only on buys
                if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
                    require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
                }
            }
        }
        
        uint256 totalTokensToSwap = _liquidityTokensToSwap + _marketingTokensToSwap + _teamTokensToSwap;
        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;
        } else {
            // Buy
            if (automatedMarketMakerPairs[from]) {
                removeAllFee();
                _taxFee = _buyTaxFee;
                _liquidityFee = _buyLiquidityFee + _buyMarketingFee + _buyTeamFee;
                buyOrSellSwitch = BUY;
            } 
            // Sell
            else if (automatedMarketMakerPairs[to]) {
                removeAllFee();
                _taxFee = _sellTaxFee;
                _liquidityFee = _sellLiquidityFee + _sellMarketingFee + _sellTeamFee;
                buyOrSellSwitch = SELL;
                // Tax if bought in the same block as trading active for 1 hours
                if(boughtEarly[from]  && earlyBuyPenaltyEnd <= block.number){
                    _taxFee = _taxFee * 2;
                    _liquidityFee = _liquidityFee * 2;
                }
            // Normal transfers do not get taxed
            } else {
                removeAllFee();
                buyOrSellSwitch = TRANSFER;
            }
        }

        _tokenTransfer(from, to, amount, takeFee);        
    }

    function swapBack() private lockTheSwap {
        uint256 contractBalance = balanceOf(address(this));        
        uint256 totalTokensToSwap = _liquidityTokensToSwap.add(_teamTokensToSwap).add(_marketingTokensToSwap);
        
        // Halve the amount of liquidity tokens
        uint256 tokensForLiquidity = _liquidityTokensToSwap.div(2);
        uint256 amountToSwapForCrypto = contractBalance.sub(tokensForLiquidity);
        
        uint256 initialCryptoBalance = address(this).balance;

        swapTokensForCrypto(amountToSwapForCrypto); 
        
        uint256 cryptoBalance = address(this).balance.sub(initialCryptoBalance);
        
        uint256 cryptoForMarketing = cryptoBalance.mul(3*_marketingTokensToSwap/4).div(totalTokensToSwap);
        uint256 cryptoForCharity = cryptoBalance.mul(_marketingTokensToSwap/4).div(totalTokensToSwap);
        uint256 cryptoForTeam1 = cryptoBalance.mul(_teamTokensToSwap/2).div(totalTokensToSwap);
        uint256 cryptoForTeam2 = cryptoBalance.mul(_teamTokensToSwap/2).div(totalTokensToSwap);
        
        uint256 cryptoForLiquidity = cryptoBalance.sub(cryptoForMarketing).sub(cryptoForTeam1).sub(cryptoForTeam2).sub(cryptoForCharity);

        _liquidityTokensToSwap = 0;
        _marketingTokensToSwap = 0;
        _teamTokensToSwap = 0;
        
        (bool success,) = address(ownerAddress).call{value: cryptoForTeam1}("");
        (success,) = address(marketingAddress).call{value: cryptoForCharity}("");
        (success,) = address(ownerAddress).call{value: cryptoForTeam2}("");
        (success,) = address(marketingAddress).call{value: cryptoForMarketing}("");
        
        
        addLiquidity(tokensForLiquidity, cryptoForLiquidity);
        emit SwapAndLiquify(amountToSwapForCrypto, cryptoForLiquidity, tokensForLiquidity);
        
        // Use leftover Crypto for buyback of token to burn
        if(address(this).balance > 0){
            swapETHForTokens(address(this).balance);
        }
    }
    
    function swapTokensForCrypto(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, path, address(this), block.timestamp);
    }
    
    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, path,deadAddress, block.timestamp.add(300));
        
        emit SwapETHForTokens(amount, path);
    }
    
    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.addLiquidityETH{ value: ethAmount }(address(this), tokenAmount, 0, 0, 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);
        }

        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;
            _teamTokensToSwap += tLiquidity * _buyTeamFee / _liquidityFee;
            _marketingTokensToSwap += tLiquidity * _buyMarketingFee / _liquidityFee;
        } else if(buyOrSellSwitch == SELL){
            _liquidityTokensToSwap += tLiquidity * _sellLiquidityFee / _liquidityFee;
            _teamTokensToSwap += tLiquidity * _sellTeamFee / _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 excludeFromFee(address account) external onlyOwner {
        _isExcludedFromFee[account] = true;
        emit ExcludeFromFee(account);
    }

    function includeInFee(address account) external onlyOwner {
        _isExcludedFromFee[account] = false;
        emit IncludeInFee(account);
    }
    
    function removeBoughtEarly(address account) external onlyOwner {
        boughtEarly[account] = false;
        emit RemovedSniper(account);
    }

    function setBuyFee(uint256 buyTaxFee, uint256 buyLiquidityFee, uint256 buyMarketingFee, uint256 buyTeamFee) external onlyOwner {
        _buyTaxFee = buyTaxFee;
        _buyLiquidityFee = buyLiquidityFee;
        _buyMarketingFee = buyMarketingFee;
        _buyTeamFee = buyTeamFee;
        emit SetBuyFee(buyMarketingFee, buyLiquidityFee, buyTaxFee, buyTeamFee);
    }

    function setSellFee(uint256 sellTaxFee, uint256 sellLiquidityFee, uint256 sellMarketingFee, uint256 sellTeamFee) external onlyOwner {
        _sellTaxFee = sellTaxFee;
        _sellLiquidityFee = sellLiquidityFee;
        _sellMarketingFee = sellMarketingFee;
        _sellTeamFee = sellTeamFee;
        emit SetSellFee(sellMarketingFee, sellLiquidityFee, sellTaxFee, sellTeamFee);
    }


    function setMarketingAddress(address _marketingAddress) external onlyOwner {
        require(_marketingAddress != address(0), "_marketingAddress address cannot be 0");
        marketingAddress = payable(_marketingAddress);
        _isExcludedFromFee[marketingAddress] = true;
        emit UpdatedMarketingAddress(_marketingAddress);
    }
    
    function setTeamAddress(address _teamAddress) external onlyOwner {
        require(_teamAddress != address(0), "_teamAddress address cannot be 0");
        teamAddress = payable(_teamAddress);
        _isExcludedFromFee[teamAddress] = true;
        emit UpdatedTeamAddress(teamAddress);
    }
    
    function setLiquidityAddress(address _liquidityAddress) external 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 getPairAddress() external view onlyOwner returns (address) {
        return uniswapV2Pair;
    }

    function changeRouterVersion(address _router) external onlyOwner returns (address _pair) {
        require(_router != address(0), "_router address cannot be 0");
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(_router);

        _pair = IUniswapV2Factory(_uniswapV2Router.factory()).getPair(
            address(this),
            _uniswapV2Router.WETH()
        );
        if (_pair == address(0)) {
            // Pair doesn't exist
            _pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(
                address(this),
                _uniswapV2Router.WETH()
            );
        }
        uniswapV2Pair = _pair;

        // Set the router of the contract variables
        uniswapV2Router = _uniswapV2Router;
        emit UpdatedRouter(_router);
    }

    // To receive ETH from uniswapV2Router when swapping
    receive() external payable {}

    function transferForeignToken(address _token, address _to) external onlyOwner returns (bool _sent) {
        require(_token != address(0), "_token address cannot be 0");
        uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
        _sent = IERC20(_token).transfer(_to, _contractBalance);
        emit TransferForeignToken(_token, _contractBalance);
    }    
}