/*
   _____                      __  _                    
  / ___/____  ____ ___  ___  / /_(_)___ ___  ___  _____
  \__ \/ __ \/ __ `__ \/ _ \/ __/ / __ `__ \/ _ \/ ___/
 ___/ / /_/ / / / / / /  __/ /_/ / / / / / /  __(__  ) 
/____/\____/_/ /_/ /_/\___/\__/_/_/ /_/ /_/\___/____/  
   /   |  / /___  ____  ___                            
  / /| | / / __ \/ __ \/ _ \                           
 / ___ |/ / /_/ / / / /  __/                           
/_/  |_/_/\____/_/ /_/\___/                                 

TG: https://t.me/AlonePortal
Website: https://alone.af
Twitter: https://twitter.com/ERC20_Alone
*/

// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;

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;
        return c;
    }
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

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() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
}

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 IUniswapV2Factory {
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    )
        external
        payable
        returns (uint amountToken, uint amountETH, uint liquidity);
}

interface IAloneFund {
    function deposit() external payable;
}

contract AloneToken is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;

    address payable public marketingWallet;
    IAloneFund public aloneFund;

    uint256 launchBlock;

    uint256 private _initialBuyTax = 2000;
    uint256 private _initialSellTax = 3000;
    uint256 private _finalBuyTax = 169;
    uint256 private _finalSellTax = 169;
    uint256 private _reduceBuyTaxAt = 20;
    uint256 private _reduceSellTaxAt = 20;
    uint256 private _preventSwapBefore = 15;
    uint256 private _buyCount = 0;
    uint256 private _taxDelimiter = 10000;

    uint8 private constant _decimals = 18;
    uint256 private constant _tTotal = 100_000_000 * 10 ** _decimals;
    string private constant _name = unicode"Sometimes Alone";
    string private constant _symbol = unicode"ALONE";
    uint256 public maxTxAmount = (_tTotal * 10) / 1000; //1%
    uint256 public maxWalletSize = (_tTotal * 10) / 1000; //1%
    uint256 public taxSwapThreshold = (_tTotal * 2) / 1000; //0.2%
    uint256 public maxTaxSwap = (_tTotal * 10) / 1000; // 1%

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool public tradingOpen;
    bool private inSwap = false;

    modifier lockTheSwap() {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor(address _marketingWallet, address _aloneFundWallet) {
        marketingWallet = payable(_marketingWallet);
        aloneFund = IAloneFund(_aloneFundWallet);
        _balances[owner()] = _tTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[marketingWallet] = true;
        _isExcludedFromFee[address(aloneFund)] = true;

        emit Transfer(address(0), owner(), _tTotal);
    }

    function launchTaxActive() public view returns (bool) {
        return (_reduceBuyTaxAt > _reduceSellTaxAt ? _reduceBuyTaxAt : _reduceSellTaxAt) > _buyCount;
    }

    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

    function totalSupply() public pure override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(
        address owner,
        address spender
    ) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(
        address spender,
        uint256 amount
    ) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "AloneToken: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "AloneToken: approve from the zero address");
        require(spender != address(0), "AloneToken: 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), "AloneToken: transfer from the zero address");
        require(to != address(0), "AloneToken: transfer to the zero address");
        require(amount > 0, "AloneToken: Transfer amount must be greater than zero");
        uint256 taxAmount = 0;
        if (!_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
            if (from == uniswapV2Pair && to != address(uniswapV2Router)) {
                require(balanceOf(to) + amount <= maxWalletSize, "AloneToken: exceeds maxWalletSize");
                require(amount <= maxTxAmount, "AloneToken: exceeds maxTxAmount.");
                taxAmount = amount.mul(
                        (_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax
                    ).div(_taxDelimiter);
                if (launchBlock + 3 > block.number) {
                    require(!isContract(to), "AloneToken: contracts cannot buy now");
                }
                _buyCount++;
            } else if (to == uniswapV2Pair) {
                require(amount <= maxTxAmount, "AloneToken: exceeds maxTxAmount.");
                taxAmount = amount.mul(
                        (_buyCount > _reduceSellTaxAt) ? _finalSellTax : _initialSellTax
                    ).div(_taxDelimiter);

                uint256 contractTokenBalance = balanceOf(address(this));
                if (
                    !inSwap &&
                    contractTokenBalance > taxSwapThreshold &&
                    _buyCount > _preventSwapBefore
                ) {
                    uint256 amountToSwap = (amount < contractTokenBalance && amount < maxTaxSwap) ? amount : (contractTokenBalance < maxTaxSwap) ? contractTokenBalance : maxTaxSwap;
                    swapTokensForEth(amountToSwap);
                    uint256 contractETHBalance = address(this).balance;
                    if (contractETHBalance > 0) {
                        sendETHToFee(contractETHBalance);
                    }
                }
            }
        }

        if (taxAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(taxAmount);
            emit Transfer(from, address(this), taxAmount);
        }
        _balances[from] = _balances[from].sub(amount);
        _balances[to] = _balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
    }

    function isContract(address account) private view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        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 removeLimits() external onlyOwner {
        maxTxAmount = _tTotal;
        maxWalletSize = _tTotal;
    }

    function removeLaunchTaxes() external onlyOwner {
        _buyCount = _reduceBuyTaxAt > _reduceSellTaxAt ? _reduceBuyTaxAt : _reduceSellTaxAt;
        _buyCount++;
    }

    function sendETHToFee(uint256 amount) private {
        uint256 marketingShare = amount.mul(4082).div(_taxDelimiter); //40.82% to marketing
        marketingWallet.transfer(marketingShare);
        aloneFund.deposit{value: amount.sub(marketingShare)}();
    }

    function rescueETH() external onlyOwner {
        address payable ownerAddress = payable(owner());
        ownerAddress.transfer(address(this).balance);
    }

    function openTrading() external onlyOwner {
        require(!tradingOpen, "AloneToken: Trading is already open");
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
            address(this),
            uniswapV2Router.WETH()
        );
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        tradingOpen = true;
        launchBlock = block.number;
    }

    receive() external payable {}
}