// SPDX-License-Identifier: Unlicensed
/**
 *
 * Superman | $HOPE
 *
 * Is it a bird? Is it a plane? No, it's Superman!
 * Here comes the Man of Steel: A Symbol of Hope!
 *
 * Twitter: https://twitter.com/Superman_erc
 * Telegram: https://twitter.com/Superman_erc
 **/

pragma solidity 0.8.18;

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;}
}

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);
}

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 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);
}

contract Superman 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;
    mapping (address => bool) private bots;
    mapping(address => uint256) private _holderLastTransferTimestamp;
    address payable public taxWallet;

    uint256 private _initialBuyTax = 20;
    uint256 private _initialSellTax = 25;
    uint256 private _finalBuyTax = 0;
    uint256 private _finalSellTax = 0;
    uint256 private _reduceBuyCountLimit = 20;
    uint256 private _reduceSellCountLimit = 30;
    uint256 private _preventSwapBefore = 30;
    uint256 private _buyCount = 0;

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 100 * 10**6 * 10**_decimals;
    string private constant _name = "Superman";
    string private constant _symbol = "HOPE";
    uint256 public _maxAmount = 3 * 10**6 * 10**_decimals;
    uint256 public _taxSwapThreshold= 2 * 10**6 * 10**_decimals;
    uint256 public _maxTaxSwap= 1 * 10**6 * 10**_decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;

    event MaxTxAmountUpdated(uint _maxAmount);
    modifier lockTheSwap {inSwap = true; _; inSwap = false;}

    constructor () {
        taxWallet = payable(_msgSender());
        _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[taxWallet] = true;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    receive() external payable {}
    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, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    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");
        uint256 taxAmount = 0;
        if (from != owner() && to != owner()) {
            require(!bots[from] && !bots[to]);
            taxAmount = amount.mul((_buyCount> _reduceBuyCountLimit)?_finalBuyTax:_initialBuyTax).div(100);

            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                require(amount <= _maxAmount, "Exceeds the _maxAmount.");
                require(balanceOf(to) + amount <= _maxAmount, "Exceeds the maxWalletSize.");
                _buyCount++;
            }

            if(to == uniswapV2Pair && from!= address(this) ){
                taxAmount = amount.mul((_buyCount>_reduceSellCountLimit)?_finalSellTax:_initialSellTax).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance >_taxSwapThreshold && _buyCount > _preventSwapBefore) {
                swapTokensForEth(_min(amount, _min(contractTokenBalance, _maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        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 _min(uint256 a, uint256 b) private pure returns (uint256){
      return (a > b) ? b : a;
    }

    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 sendETHToFee(uint256 amount) private {
        taxWallet.transfer(amount);
    }

    function openTrading() external onlyOwner() {
        require(!tradingOpen, "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);
        swapEnabled = true;
        tradingOpen = true;
    }
}