// SPDX-License-Identifier: MIT                                                                               
                                                    
pragma solidity 0.8.15;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);
    }

    function _createInitialSupply(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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);
    }
}

contract Ownable is Context {
    address private _owner;

    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) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

interface IDexRouter {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function swapExactTokensForETHSupportingFeeOnTransferTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable;
    function addLiquidityETH(address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline) external payable returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function removeLiquidityETH(address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline) external returns (uint amountToken, uint amountETH);
}

interface IDexFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IPriceFeed {
    function latestAnswer() external returns (int256);
}

contract Oof is ERC20, Ownable {

    uint256 public maxBuyAmount;
    uint256 public maxSellAmount;
    uint256 public maxWallet;

    IDexRouter public dexRouter;
    address public lpPair;

    IPriceFeed internal immutable priceFeed;

    bool private swapping;
    uint256 public swapTokensAtAmount;

    address public operationsAddress;
    address public devAddress;
    address public futureOwner;

    uint256 public tradingActiveBlock = 0; // 0 means trading is not active
    uint256 public blockForPenaltyEnd;
    mapping (address => bool) public boughtEarly;
    address[] public earlyBuyers;
    uint256 public botsCaught;

    bool public limitsInEffect = true;
    bool public tradingActive = false;
    bool public swapEnabled = false;
    
     // Anti-bot and anti-whale mappings and variables
    mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
    bool public transferDelayEnabled = true;

    uint256 public buyTotalFees;
    uint256 public buyOperationsFee;
    uint256 public buyLiquidityFee;
    uint256 public buyDevFee;

    uint256 public sellTotalFees;
    uint256 public sellOperationsFee;
    uint256 public sellLiquidityFee;
    uint256 public sellDevFee;

    uint256 public constant FEE_DIVISOR = 10000;

    uint256 public tokensForOperations;
    uint256 public tokensForLiquidity;
    uint256 public tokensForDev;

    uint256 public percentForLPBurn = 25; // 25 = .25%
    bool public lpBurnEnabled = false;
    uint256 public lpBurnFrequency = 3600 seconds;
    uint256 public lastLpBurnTime;
    
    uint256 public manualBurnFrequency = 30 minutes;
    uint256 public lastManualLpBurnTime;

    // floating liquidity settings
    bool public customLiquidityActive = true;
    uint256 public latestEthPrice = 0;
    uint256 public minimumBuyLiqPerc = 50;
    uint256 public minimumSellLiqPerc = 33;
    uint256 public maximumBuyLiqPerc = 80;
    uint256 public maximumSellLiqPerc = 50;
    uint256 public mcapComparisonValue = 10 * 1e6;

    
    /******************/

    // exlcude from fees and max transaction amount
    mapping (address => bool) private _isExcludedFromFees;
    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;

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    event EnabledTrading();

    event RemovedLimits();

    event ExcludeFromFees(address indexed account, bool isExcluded);

    event UpdatedMaxBuyAmount(uint256 newAmount);

    event UpdatedMaxSellAmount(uint256 newAmount);

    event UpdatedMaxWalletAmount(uint256 newAmount);

    event UpdatedOperationsAddress(address indexed newWallet);

    event UpdatedDevAddress(address indexed newWallet);

    event MaxTransactionExclusion(address _address, bool excluded);

    event OwnerForcedSwapBack(uint256 timestamp);

    event CaughtEarlyBuyer(address sniper);

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );

    event AutoBurnLP(uint256 indexed tokensBurned);

    event ManualBurnLP(uint256 indexed tokensBurned);

    event TransferForeignToken(address token, uint256 amount);

    constructor() ERC20("OOF", "OOF") payable {
        
        address newOwner = msg.sender; // can leave alone if owner is deployer.
        address _dexRouter;
        address _priceFeed;

        if(block.chainid == 1){
            _dexRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // ETH: Uniswap V2
            _priceFeed = 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419;
        } else if(block.chainid == 4){
            _dexRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // Rinkeby ETH: Uniswap V2
            _priceFeed = 0x8A753747A1Fa494EC906cE90E9f37563A8AF630e;
        } else if(block.chainid == 56){
            _dexRouter = 0x10ED43C718714eb63d5aA57B78B54704E256024E; // BNB Chain: PCS V2
            _priceFeed = 0x0567F2323251f0Aab15c8dFb1967E4e8A7D42aeE;
        } else if(block.chainid == 97){
            _dexRouter = 0xD99D1c33F9fC3444f8101754aBC46c52416550D1; // BNB Chain Testnet: PCS V2
            _priceFeed = 0x2514895c72f50D8bd4B4F9b1110F0D6bD2c97526;
        } else if(block.chainid == 42161){
            _dexRouter = 0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506; // Arbitrum: SushiSwap
            _priceFeed = 0x639Fe6ab55C921f74e7fac1ee960C0B6293ba612;
        } else {
            revert("Chain not configured");
        }

        priceFeed = IPriceFeed(_priceFeed);
        require(priceFeed.latestAnswer() > 0, "wrong price feed");

        // initialize router
        dexRouter = IDexRouter(_dexRouter);

        uint256 totalSupply = 100 * 1e6 * (10 ** decimals());
        
        maxBuyAmount = totalSupply * 5 / 10000;
        maxSellAmount = totalSupply * 5 / 10000;
        maxWallet = totalSupply * 1 / 1000;
        swapTokensAtAmount = totalSupply * 25 / 100000;

        buyOperationsFee = 0;
        buyLiquidityFee = 100;
        buyDevFee = 200;
        buyTotalFees = buyOperationsFee + buyLiquidityFee + buyDevFee;

        sellOperationsFee = 3333;
        sellLiquidityFee = 3333;
        sellDevFee = 3333;
        sellTotalFees = sellOperationsFee + sellLiquidityFee + sellDevFee;

        if(block.chainid == 1){
            operationsAddress = address(0x1DE548Cf3b40c8D29d141ce63be49982E733B41A);
            devAddress = address(0x1DE548Cf3b40c8D29d141ce63be49982E733B41A);
            futureOwner = address(0x1DE548Cf3b40c8D29d141ce63be49982E733B41A);
        } else {
            operationsAddress = address(msg.sender);
            devAddress = address(msg.sender);
            futureOwner = address(msg.sender);
        }

        _excludeFromMaxTransaction(newOwner, true);
        _excludeFromMaxTransaction(address(this), true);
        _excludeFromMaxTransaction(address(0xdead), true);
        _excludeFromMaxTransaction(address(operationsAddress), true);
        _excludeFromMaxTransaction(address(dexRouter), true);
        _excludeFromMaxTransaction(address(futureOwner), true);

        excludeFromFees(newOwner, true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(0xdead), true);
        excludeFromFees(address(operationsAddress), true);
        excludeFromFees(address(dexRouter), true);
        excludeFromFees(address(futureOwner), true);

        
        _createInitialSupply(address(this), totalSupply * 66 / 100);  // update with % for LP
        _createInitialSupply(futureOwner, totalSupply - balanceOf(address(this)));
        transferOwnership(newOwner);
    }

    receive() external payable {}

    function setCustomLiquidityActive(bool active) external onlyOwner {
        customLiquidityActive = active;
    }
    
    function enableTrading(uint256 blocksForPenalty, address _lpPair) external onlyOwner {
        require(!tradingActive, "Cannot reenable trading");
        require(blocksForPenalty <= 10, "Cannot make penalty blocks more than 10");
        tradingActive = true;
        swapEnabled = true;
        tradingActiveBlock = block.number;
        blockForPenaltyEnd = tradingActiveBlock + blocksForPenalty;
        
        // set pair
        lpPair = _lpPair;
        _excludeFromMaxTransaction(address(lpPair), true);
        _setAutomatedMarketMakerPair(address(lpPair), true);

        emit EnabledTrading();
    }
    
    // remove limits after token is stable
    function removeLimits() external onlyOwner {

        limitsInEffect = false;
        transferDelayEnabled = false;
        maxBuyAmount = totalSupply();
        maxSellAmount = totalSupply();

        emit RemovedLimits();
    }

    function getEarlyBuyers() external view returns (address[] memory){
        return earlyBuyers;
    }

    function massManageRestrictedWallets(address[] calldata accounts, bool restricted) external onlyOwner {
        for(uint256 i = 0; i < accounts.length; i++){
            boughtEarly[accounts[i]] = restricted;
        }
    }

    // disable Transfer delay - cannot be reenabled
    function disableTransferDelay() external onlyOwner {
        transferDelayEnabled = false;
    }
    
    function updateMaxBuyAmount(uint256 newNum) external onlyOwner {
        require(newNum >= (totalSupply() * 1 / 1000) / (10 ** decimals()), "Cannot set max buy amount lower than 0.1%");
        maxBuyAmount = newNum * (10 ** decimals());
        emit UpdatedMaxBuyAmount(maxBuyAmount);
    }
    
    function updateMaxSellAmount(uint256 newNum) external onlyOwner {
        require(newNum >= (totalSupply() * 1 / 1000) / (10 ** decimals()), "Cannot set max sell amount lower than 0.1%");
        maxSellAmount = newNum * (10 ** decimals());
        emit UpdatedMaxSellAmount(maxSellAmount);
    }

    function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
        require(newNum >= (totalSupply() * 1 / 100) / (10 ** decimals()), "Cannot set max sell amount lower than 1%");
        maxWallet = newNum * (10 ** decimals());
        emit UpdatedMaxWalletAmount(maxWallet);
    }

    // change the minimum amount of tokens to sell from fees
    function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner {
  	    require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
  	    require(newAmount <= totalSupply() * 1 / 1000, "Swap amount cannot be higher than 0.1% total supply.");
  	    swapTokensAtAmount = newAmount;
  	}
    
    function _excludeFromMaxTransaction(address updAds, bool isExcluded) private {
        _isExcludedMaxTransactionAmount[updAds] = isExcluded;
        emit MaxTransactionExclusion(updAds, isExcluded);
    }

    function airdropToWallets(address[] memory wallets, uint256[] memory amountsInTokens) external onlyOwner {
        require(wallets.length == amountsInTokens.length, "arrays must be the same length");
        require(wallets.length < 300, "Can only airdrop 300 wallets per txn due to gas limits"); // allows for airdrop + launch at the same exact time, reducing delays and reducing sniper input.
        for(uint256 i = 0; i < wallets.length; i++){
            address wallet = wallets[i];
            uint256 amount = amountsInTokens[i];
            super._transfer(msg.sender, wallet, amount);
        }
    }
    
    function excludeFromMaxTransaction(address updAds, bool isEx) external onlyOwner {
        if(!isEx){
            require(updAds != lpPair, "Cannot remove uniswap pair from max txn");
        }
        _isExcludedMaxTransactionAmount[updAds] = isEx;
    }

    function setAutomatedMarketMakerPair(address pair, bool value) external onlyOwner {
        require(pair != lpPair, "The pair cannot be removed from automatedMarketMakerPairs");
        _setAutomatedMarketMakerPair(pair, value);
        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;
        _excludeFromMaxTransaction(pair, value);
        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function updateBuyFees(uint256 _operationsFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
        buyOperationsFee = _operationsFee;
        buyLiquidityFee = _liquidityFee;
        buyDevFee = _devFee;
        buyTotalFees = buyOperationsFee + buyLiquidityFee + buyDevFee;
        require(buyTotalFees <= 15 * FEE_DIVISOR / 100, "Must keep fees at 15% or less");
    }

    function updateSellFees(uint256 _operationsFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
        sellOperationsFee = _operationsFee;
        sellLiquidityFee = _liquidityFee;
        sellDevFee = _devFee;
        sellTotalFees = sellOperationsFee + sellLiquidityFee + sellDevFee;
        require(sellTotalFees <= 20 * FEE_DIVISOR / 100, "Must keep fees at 20% or less");
    }

    function massExcludeFromFees(address[] calldata accounts, bool excluded) external onlyOwner {
        for(uint256 i = 0; i < accounts.length; i++){
            _isExcludedFromFees[accounts[i]] = excluded;
            emit ExcludeFromFees(accounts[i], excluded);
        }
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function _transfer(address from, address to, uint256 amount) internal override {

        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "amount must be greater than 0");
        
        if(!tradingActive){
            require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
        }

        if(tradingActive){
            require((!boughtEarly[from] && !boughtEarly[to]) || to == owner() || to == address(0xdead), "Bots cannot transfer tokens in or out except to owner or dead address.");
        }
        
        if(limitsInEffect){
            if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]){
                
                // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.  
                if (transferDelayEnabled){
                    if (to != address(dexRouter) && to != address(lpPair)){
                        require(_holderLastTransferTimestamp[tx.origin] < block.number - 2 && _holderLastTransferTimestamp[to] < block.number - 2, "_transfer:: Transfer Delay enabled.  Try again later.");
                        _holderLastTransferTimestamp[tx.origin] = block.number;
                        _holderLastTransferTimestamp[to] = block.number;
                    }
                }
                 
                //when buy
                if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
                    require(amount <= maxBuyAmount, "Buy transfer amount exceeds the max buy.");
                    require(amount + balanceOf(to) <= maxWallet, "Max Wallet Exceeded");
                } 
                //when sell
                else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                    require(amount <= maxSellAmount, "Sell transfer amount exceeds the max sell.");
                } else if (!_isExcludedMaxTransactionAmount[to]){
                    require(amount + balanceOf(to) <= maxWallet, "Max Wallet Exceeded");
                }
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));
        
        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if(canSwap && swapEnabled && !swapping && !automatedMarketMakerPairs[from] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
            swapping = true;
            swapBack();
            swapping = false;
        }

        if(!swapping && automatedMarketMakerPairs[to] && lpBurnEnabled && block.timestamp >= lastLpBurnTime + lpBurnFrequency && !_isExcludedFromFees[from]){
            autoBurnLiquidityPairTokens();
        }

        bool takeFee = true;
        // if any account belongs to _isExcludedFromFee account then remove the fee
        if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }
        
        uint256 fees = 0;

        if(customLiquidityActive && tradingActive && !swapping){
            latestEthPrice = uint256(priceFeed.latestAnswer());
            setCustomFees();
        }

        // only take fees on buys/sells, do not take on wallet transfers
        if(takeFee){
            // bot/sniper penalty.
            if(earlyBuyPenaltyInEffect() && automatedMarketMakerPairs[from] && !automatedMarketMakerPairs[to] && !_isExcludedFromFees[to] && buyTotalFees > 0){
                
                if(!earlyBuyPenaltyInEffect()){
                    // reduce by 1 wei per max buy over what Uniswap will allow to revert bots as best as possible to limit erroneously blacklisted wallets. First bot will get in and be blacklisted, rest will be reverted (*cross fingers*)
                    maxBuyAmount -= 1;
                }

                if(!boughtEarly[to]){
                    boughtEarly[to] = true;
                    botsCaught += 1;
                    earlyBuyers.push(to);
                    emit CaughtEarlyBuyer(to);
                }

                fees = amount * buyTotalFees / FEE_DIVISOR;
        	    tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
                tokensForOperations += fees * buyOperationsFee / buyTotalFees;
                tokensForDev += fees * buyDevFee / buyTotalFees;
            }

            // on sell
            else if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
                fees = amount * sellTotalFees / FEE_DIVISOR;
                tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
                tokensForOperations += fees * sellOperationsFee / sellTotalFees;
                tokensForDev += fees * sellDevFee / sellTotalFees;
            }

            // on buy
            else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
        	    fees = amount * buyTotalFees / FEE_DIVISOR;
        	    tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
                tokensForOperations += fees * buyOperationsFee / buyTotalFees;
                tokensForDev += fees * buyDevFee / buyTotalFees;
            }
            
            if(fees > 0){    
                super._transfer(from, address(this), fees);
            }
        	
        	amount -= fees;
        }

        super._transfer(from, to, amount);
    }

    function earlyBuyPenaltyInEffect() public view returns (bool){
        return block.number < blockForPenaltyEnd;
    }

    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] = dexRouter.WETH();

        _approve(address(this), address(dexRouter), tokenAmount);

        // make the swap
        dexRouter.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(dexRouter), tokenAmount);

        // add the liquidity
        dexRouter.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            address(this),
            block.timestamp
        );
    }

    function swapBack() private {

        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForLiquidity + tokensForOperations + tokensForDev;
        
        if(contractBalance == 0 || totalTokensToSwap == 0) {return;}

        if(contractBalance > swapTokensAtAmount * 20){
            contractBalance = swapTokensAtAmount * 20;
        }

        bool success;
        
        // Halve the amount of liquidity tokens
        uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
        
        swapTokensForEth(contractBalance - liquidityTokens); 
        
        uint256 ethBalance = address(this).balance;
        uint256 ethForLiquidity = ethBalance;

        uint256 ethForOperations = ethBalance * tokensForOperations / (totalTokensToSwap - (tokensForLiquidity/2));
        uint256 ethForDev = ethBalance * tokensForDev / (totalTokensToSwap - (tokensForLiquidity/2));

        ethForLiquidity -= ethForOperations + ethForDev;
            
        tokensForLiquidity = 0;
        tokensForOperations = 0;
        tokensForDev = 0;
        
        if(liquidityTokens > 0 && ethForLiquidity > 0){
            addLiquidity(liquidityTokens, ethForLiquidity);
        }

        (success,) = address(devAddress).call{value: ethForDev}("");

        (success,) = address(operationsAddress).call{value: address(this).balance}("");
    }

    function transferForeignToken(address _token, address _to) external onlyOwner returns (bool _sent) {
        require(_token != address(0), "_token address cannot be 0");
        require(_token != address(this) || !tradingActive, "Can't withdraw native tokens while trading is active");
        uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
        _sent = IERC20(_token).transfer(_to, _contractBalance);
        emit TransferForeignToken(_token, _contractBalance);
    }

    // withdraw ETH if stuck or someone sends to the address
    function withdrawStuckETH() external onlyOwner {
        bool success;
        (success,) = address(msg.sender).call{value: address(this).balance}("");
    }

    function setOperationsAddress(address _operationsAddress) external onlyOwner {
        require(_operationsAddress != address(0), "_operationsAddress address cannot be 0");
        operationsAddress = payable(_operationsAddress);
        emit UpdatedOperationsAddress(_operationsAddress);
    }
    
    function setDevAddress(address _devAddress) external onlyOwner {
        require(_devAddress != address(0), "_operationsAddress address cannot be 0");
        devAddress = payable(_devAddress);
        emit UpdatedDevAddress(_devAddress);
    }

    // force Swap back if slippage issues.
    function forceSwapBack() external onlyOwner {
        require(balanceOf(address(this)) >= swapTokensAtAmount, "Can only swap when token amount is at or higher than restriction");
        swapping = true;
        swapBack();
        swapping = false;
        emit OwnerForcedSwapBack(block.timestamp);
    }

    function launch(uint256 blocksForPenalty) external onlyOwner {
        require(!tradingActive, "Trading is already active, cannot relaunch.");

        // create pair
        lpPair = IDexFactory(dexRouter.factory()).createPair(address(this), dexRouter.WETH());
        _excludeFromMaxTransaction(address(lpPair), true);
        _setAutomatedMarketMakerPair(address(lpPair), true);
   
        // add the liquidity

        require(address(this).balance > 0, "Must have ETH on contract to launch");

        require(balanceOf(address(this)) > 0, "Must have Tokens on contract to launch");

        _approve(address(this), address(dexRouter), balanceOf(address(this)));
        dexRouter.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            address(futureOwner),
            block.timestamp
        );

        latestEthPrice = uint256(priceFeed.latestAnswer());

        //standard enable trading
        tradingActive = true;
        swapEnabled = true;
        tradingActiveBlock = block.number;
        blockForPenaltyEnd = tradingActiveBlock + blocksForPenalty;
        emit EnabledTrading();
    }

    function setAutoLPBurnSettings(uint256 _frequencyInSeconds, uint256 _percent, bool _Enabled) external onlyOwner {
        require(_frequencyInSeconds >= 600, "cannot set buyback more often than every 10 minutes");
        require(_percent <= 1000 && _percent >= 0, "Must set auto LP burn percent between 0% and 10%");
        lpBurnFrequency = _frequencyInSeconds;
        percentForLPBurn = _percent;
        lpBurnEnabled = _Enabled;
    }
    
    function autoBurnLiquidityPairTokens() internal {
        
        lastLpBurnTime = block.timestamp;
        
        lastManualLpBurnTime = block.timestamp;
        uint256 lpBalance = IERC20(lpPair).balanceOf(address(this));
        uint256 tokenBalance = balanceOf(address(this));
        uint256 lpAmount = lpBalance * percentForLPBurn / 10000;
        uint256 initialEthBalance = address(this).balance;

        // approve token transfer to cover all possible scenarios
        IERC20(lpPair).approve(address(dexRouter), lpAmount);

        // remove the liquidity
        dexRouter.removeLiquidityETH(
            address(this),
            lpAmount,
            1, // slippage is unavoidable
            1, // slippage is unavoidable
            address(this),
            block.timestamp
        );

        uint256 deltaTokenBalance = balanceOf(address(this)) - tokenBalance;
        if(deltaTokenBalance > 0){
            super._transfer(address(this), address(0xdead), deltaTokenBalance);
        }

        uint256 deltaEthBalance = address(this).balance - initialEthBalance;

        if(deltaEthBalance > 0){
            buyBackTokens(deltaEthBalance);
        }

        emit AutoBurnLP(lpAmount);
    }

    function manualBurnLiquidityPairTokens(uint256 percent) external onlyOwner {
        require(percent <= 5000, "May not burn more than 50% of contract's LP at a time");
        require(lastManualLpBurnTime <= block.timestamp - manualBurnFrequency, "Burn too soon");
        lastManualLpBurnTime = block.timestamp;
        uint256 lpBalance = IERC20(lpPair).balanceOf(address(this));
        uint256 tokenBalance = balanceOf(address(this));
        uint256 lpAmount = lpBalance * percent / 10000;
        uint256 initialEthBalance = address(this).balance;

        // approve token transfer to cover all possible scenarios
        IERC20(lpPair).approve(address(dexRouter), lpAmount);

        // remove the liquidity
        dexRouter.removeLiquidityETH(
            address(this),
            lpAmount,
            1, // slippage is unavoidable
            1, // slippage is unavoidable
            address(this),
            block.timestamp
        );

        uint256 deltaTokenBalance = balanceOf(address(this)) - tokenBalance;
        if(deltaTokenBalance > 0){
            super._transfer(address(this), address(0xdead), deltaTokenBalance);
        }

        uint256 deltaEthBalance = address(this).balance - initialEthBalance;

        if(deltaEthBalance > 0){
            buyBackTokens(deltaEthBalance);
        }

        emit ManualBurnLP(lpAmount);
    }

    function buyBackTokens(uint256 amountInWei) internal {
        address[] memory path = new address[](2);
        path[0] = dexRouter.WETH();
        path[1] = address(this);

        dexRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amountInWei}(
            0,
            path,
            address(0xdead),
            block.timestamp
        );
    }

    function getMcap() public view returns (uint256){
        return (IERC20(dexRouter.WETH()).balanceOf(address(lpPair)) * 1e18 * latestEthPrice / balanceOf(address(lpPair)) * (totalSupply()-balanceOf(address(0xdead))) / 1e18 / 1e8); 
    }

    function customLiquiditySettings(bool _customLiquidityActive, uint256 _minimumBuyLiqPerc, uint256 _maximumBuyLiqPerc, uint256 _minimumSellLiqPerc, uint256 _maximumSellLiqPerc, uint256 _mcapComparisonValue) external onlyOwner {
        require(_minimumBuyLiqPerc <= 100 && _maximumBuyLiqPerc <= 100 && _minimumBuyLiqPerc <= _maximumBuyLiqPerc, "Buy settings incorrect");
        require(_minimumSellLiqPerc <= 100 && _maximumSellLiqPerc <= 100 && _minimumSellLiqPerc <= _maximumSellLiqPerc, "Sell settings incorrect");
        customLiquidityActive = _customLiquidityActive;
        minimumBuyLiqPerc = _minimumBuyLiqPerc;
        maximumBuyLiqPerc = _maximumBuyLiqPerc;
        minimumSellLiqPerc = _minimumSellLiqPerc;
        maximumSellLiqPerc = _maximumSellLiqPerc;
        mcapComparisonValue = _mcapComparisonValue;
    }

    function setCustomFees() internal {
        uint256 mcap = getMcap();
        uint256 newLiquidityPercBuy = (mcap / mcapComparisonValue) * maximumBuyLiqPerc / 1e18 + minimumBuyLiqPerc;
        uint256 newLiquidityPercSell = (mcap / mcapComparisonValue) * maximumSellLiqPerc / 1e18 + minimumSellLiqPerc;
        if(newLiquidityPercBuy > maximumBuyLiqPerc){
            newLiquidityPercBuy = maximumBuyLiqPerc;
        }
        if(newLiquidityPercSell > maximumSellLiqPerc){
            newLiquidityPercSell = maximumSellLiqPerc;
        }
        buyLiquidityFee = buyTotalFees * newLiquidityPercBuy / 100;
        buyOperationsFee = (buyTotalFees - buyLiquidityFee) * 33 / 100;
        buyDevFee = buyTotalFees - buyOperationsFee - buyLiquidityFee;
            
        sellLiquidityFee = sellTotalFees * newLiquidityPercSell / 100;
        sellOperationsFee = (sellTotalFees - sellLiquidityFee) * 50 / 100;
        sellDevFee = sellTotalFees - sellOperationsFee - sellLiquidityFee;
    }
}