// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
pragma experimental ABIEncoderV2;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {return msg.sender;}
    function _msgData() internal view virtual returns (bytes calldata) {return msg.data;}
}

abstract contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    constructor() {_transferOwnership(_msgSender());}
    function owner() public view virtual returns (address) {return _owner;}
    modifier onlyOwner() {require(owner() == _msgSender(), "Ownable: caller is not the owner");_;}
    function transferOwnership(address newOwner) public virtual onlyOwner {require(newOwner != address(0), "Ownable: new owner is the zero address");_transferOwnership(newOwner);}
    function _transferOwnership(address newOwner) internal virtual {address oldOwner = _owner;_owner = newOwner;emit OwnershipTransferred(oldOwner, newOwner);}
}

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);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    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");_beforeTokenTransfer(sender, recipient, amount);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);_afterTokenTransfer(sender, recipient, amount);}
    function _mint(address account, uint256 amount) internal virtual {require(account != address(0), "ERC20: mint to the zero address");_beforeTokenTransfer(address(0), account, amount);_totalSupply += amount;_balances[account] += amount;emit Transfer(address(0), account, amount);_afterTokenTransfer(address(0), account, amount);}
    function _burn(address account, uint256 amount) internal virtual {require(account != address(0), "ERC20: burn from the zero address");_beforeTokenTransfer(account, address(0), amount);uint256 accountBalance = _balances[account];require(accountBalance >= amount, "ERC20: burn amount exceeds balance");unchecked {_balances[account] = accountBalance - amount;}_totalSupply -= amount;emit Transfer(account, address(0), amount);_afterTokenTransfer(account, address(0), 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);}
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

library SafeMath {
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {unchecked {uint256 c = a + b;if (c < a) return (false, 0);return (true, c);}}
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {unchecked {if (b > a) return (false, 0);return (true, a - b);}}
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {unchecked {if (a == 0) return (true, 0);uint256 c = a * b;if (c / a != b) return (false, 0);return (true, c);}}
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {unchecked {if (b == 0) return (false, 0);return (true, a / b);}}
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {unchecked {if (b == 0) return (false, 0);return (true, a % b);}}
    function add(uint256 a, uint256 b) internal pure returns (uint256) {return a + b;}
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {return a - b;}
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {return a * b;}
    function div(uint256 a, uint256 b) internal pure returns (uint256) {return a / b;}
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {return a % b;}
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {unchecked {require(b <= a, errorMessage);return a - b;}}
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {unchecked {require(b > 0, errorMessage);return a / b;}}
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {unchecked {require(b > 0, errorMessage);return a % b;}}
}

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 Mint(address indexed sender, uint256 amount0, uint256 amount1);
    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 mint(address to) external returns (uint256 liquidity);
    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 IUniswapV2Router02 {
    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 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 OnlyFansLight is ERC20, Ownable {
    using SafeMath for uint256;
    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public constant deadAddress = address(0xdead);
    mapping (address => bool) private _blacklist;
    bool private swapping;
    address public marketingWallet;
    address public devWallet;
    uint256 public swapTokensAtAmount;
    bool public limitsInEffect = true;
    bool public tradingActive = false;
    bool public swapEnabled = false;
    mapping(address => uint256) private _holderLastTransferTimestamp;
    bool public transferDelayEnabled = true;
    uint256 public buyTotalFees;
    uint256 public buyLiquidityFee;
    uint256 public buyMarketingFee;
    uint256 public buyDevFee;
    uint256 public sellTotalFees;
    uint256 public sellLiquidityFee;
    uint256 public sellMarketingFee;
    uint256 public sellDevFee;
    uint256 public tokensForLiquidity;
    uint256 public tokensForMarketing;
    uint256 public tokensForDev;
    /***************************/
    mapping(address => bool) private _isExcludedFromFees;
    mapping(address => bool) public automatedMarketMakerPairs;

    event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
    event ExcludeFromFees(address indexed account, bool isExcluded);
    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
    event marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
    event devWalletUpdated(address indexed newWallet, address indexed oldWallet);
    event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiquidity);
    event AutoNukeLP();
    event ManualNukeLP();

    constructor() ERC20("OnlyFansLight.com", "OFL") {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Router = _uniswapV2Router;
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);

        uint256 _buyLiquidityFee = 0;
        uint256 _buyMarketingFee = 1;
        uint256 _buyDevFee = 1;

        uint256 _sellLiquidityFee = 0;
        uint256 _sellMarketingFee = 25;
        uint256 _sellDevFee = 25;

        uint256 totalSupply = 10_000_000 * 1e18;

        swapTokensAtAmount = (totalSupply * 1) / 500; // 0.2% swap wallet

        buyLiquidityFee = _buyLiquidityFee;
        buyMarketingFee = _buyMarketingFee;
        buyDevFee = _buyDevFee;
        buyTotalFees = buyLiquidityFee + buyMarketingFee + buyDevFee;

        sellLiquidityFee = _sellLiquidityFee;
        sellMarketingFee = _sellMarketingFee;
        sellDevFee = _sellDevFee;
        sellTotalFees = sellLiquidityFee + sellMarketingFee + sellDevFee;

        marketingWallet = address(0x84dDb8930415Dbba4c52Ed88eb666608c5ED7c2E); // set as marketing wallet
        devWallet = address(0x2A05b2b73e4E2B874B232D3F03CAe1111A209B71); // set as dev wallet

        // exclude from paying fees or having max transaction amount
        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(marketingWallet, true);
        excludeFromFees(devWallet, true);
        excludeFromFees(address(0xdead), true);

        /*
            _mint is an internal function in ERC20.sol that is only called here, and CANNOT be called ever again
        */
        _mint(msg.sender, totalSupply);
    }

    receive() external payable {}

    // once enabled, can never be turned off
    function enableTrading() external onlyOwner {
        tradingActive = true;
        swapEnabled = true;
    }

    // remove limits after token is stable
    function removeLimits() external onlyOwner returns (bool) {
        limitsInEffect = false;
        return true;
    }

    // disable Transfer delay - cannot be reenabled
    function disableTransferDelay() external onlyOwner returns (bool) {
        transferDelayEnabled = false;
        return true;
    }

    // change the minimum amount of tokens to sell from fees
    function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool)
    {
        require(
            newAmount >= (totalSupply() * 1) / 100000,
            "Swap amount cannot be lower than 0.001% total supply."
        );
        require(
            newAmount <= (totalSupply() * 5) / 1000,
            "Swap amount cannot be higher than 0.5% total supply."
        );
        swapTokensAtAmount = newAmount;
        return true;
    }


    // only use to disable contract sales if absolutely necessary (emergency use only)
    function updateSwapEnabled(bool enabled) external onlyOwner {
        swapEnabled = enabled;
    }

    function updateBuyFees(
        uint256 _liquidityFee,
        uint256 _marketingFee,
        uint256 _devFee
    ) external onlyOwner {
        buyLiquidityFee = _liquidityFee;
        buyMarketingFee = _marketingFee;
        buyDevFee = _devFee;
        buyTotalFees = buyLiquidityFee + buyMarketingFee + buyDevFee;
        require(buyTotalFees <= 20, "Must keep fees at 20% or less");
    }

    function updateSellFees(
        uint256 _liquidityFee,
        uint256 _marketingFee,
        uint256 _devFee
    ) external onlyOwner {
        sellLiquidityFee = _liquidityFee;
        sellMarketingFee = _marketingFee;
        sellDevFee = _devFee;
        sellTotalFees = sellLiquidityFee + sellMarketingFee + sellDevFee;
        require(sellTotalFees <= 20, "Must keep fees at 20% or less");
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
        require(
            pair != uniswapV2Pair,
            "The pair cannot be removed from automatedMarketMakerPairs"
        );
        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;
        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function updateMarketingWallet(address newMarketingWallet) external onlyOwner {
        emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
        marketingWallet = newMarketingWallet;
    }

    function updateDevWallet(address newWallet) external onlyOwner {
        emit devWalletUpdated(newWallet, devWallet);
        devWallet = newWallet;
    }

    function isExcludedFromFees(address account) public view returns (bool) {
        return _isExcludedFromFees[account];
    }

    event BoughtEarly(address indexed sniper);

    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(!_blacklist[from] && !_blacklist[to], "You are a bot");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (limitsInEffect) {
            if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping) {
                if (!tradingActive) {
                    require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
                }

                // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
                if (transferDelayEnabled) {
                    if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
                        require(_holderLastTransferTimestamp[tx.origin] < block.number, "Only one transfer per block allowed.");
                        _holderLastTransferTimestamp[tx.origin] = block.number;
                    }
                }
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if (canSwap && swapEnabled && !swapping && !automatedMarketMakerPairs[from] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
            swapping = true;
            swapBack();
            swapping = false;
        }

        bool takeFee = !swapping;

        // if any account belongs to _isExcludedFromFee account then remove the fee
        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;
        // only take fees on buys/sells, do not take on wallet transfers
        if (takeFee) {
            // on sell
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
                fees = amount.mul(sellTotalFees).div(100);
                tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
                tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
                tokensForDev += (fees * sellDevFee) / sellTotalFees;
            }
            // on buy
            else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                fees = amount.mul(buyTotalFees).div(100);
                tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
                tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
                tokensForDev += (fees * buyDevFee) / buyTotalFees;
            }

            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }
            amount -= fees;
        }

        super._transfer(from, to, amount);
    }

    function addBL(address account, bool isBlacklisted) public onlyOwner {
        _blacklist[account] = isBlacklisted;
    }

    function multiBL(address[] memory multiblacklist_) public onlyOwner {
        for (uint256 i = 0; i < multiblacklist_.length; i++) {
            _blacklist[multiblacklist_[i]] = true;
        }
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            deadAddress,
            block.timestamp
        );
    }

    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
        bool success;

        if (contractBalance == 0 || totalTokensToSwap == 0) {
            return;
        }

        if (contractBalance > swapTokensAtAmount * 20) {
            contractBalance = swapTokensAtAmount * 20;
        }

        // Halve the amount of liquidity tokens
        uint256 liquidityTokens = (contractBalance * tokensForLiquidity) / totalTokensToSwap / 2;
        uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
        uint256 initialETHBalance = address(this).balance;
        swapTokensForEth(amountToSwapForETH);
        uint256 ethBalance = address(this).balance.sub(initialETHBalance);
        uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
        uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
        uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
        tokensForLiquidity = 0;
        tokensForMarketing = 0;
        tokensForDev = 0;
        (success, ) = address(devWallet).call{value: ethForDev}("");

        if (liquidityTokens > 0 && ethForLiquidity > 0) {
            addLiquidity(liquidityTokens, ethForLiquidity);
            emit SwapAndLiquify(
                amountToSwapForETH,
                ethForLiquidity,
                tokensForLiquidity
            );
        }

        (success, ) = address(marketingWallet).call{
            value: address(this).balance
        }("");
    }
}