/**

Hey guys, boomer here. Looking to get back into the ol "crypto". 
Back in my day, bitcoin was worth pennies! Crazy to think where it is now.. 
Anyways, what's some good coin to buy into?.. 
Been hearing a lot about "alt- coin".. What's that?
Thanks

Website: https://www.boomergang.vip/
Telegram: https://t.me/boomergangcoin

**/

// SPDX-License-Identifier: MIT

pragma solidity 0.8.20;
abstract contract Context 
{
    function _msgSender() internal view virtual returns (address) 
    {
        return msg.sender;
    }
}

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
     function allowance(address owner, address spender) external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
     function transfer(address recipient, uint256 amount) external returns (bool);
    function totalSupply() external view returns (uint256);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Approval (address indexed owner, address indexed spender, uint256 value);
   
}

library SafeMath {
    
    

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

  
     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 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 div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) 
    {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;
    }




}

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 BoomerGang is Context, IERC20, Ownable 
{
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private bots;
    mapping (address => mapping (address => uint256)) private _allowances;
    address payable private _taxWallet;
    uint256 private _initialBuyTax=15;
    uint256 private _initialSellTax=15;
    uint256 private _finalBuyTax=0;
    uint256 private _finalSellTax=0;
    uint256 private _reduceBuyTaxAt=20;
    uint256 private _reduceSellTaxAt=20;
    uint256 private _preventSwapBefore=20;
    uint256 firstBlock;
    uint256 private _buyCount=0;
    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 100000000 * 10**_decimals;
    string private constant _name = unicode"Boomer Gang";
    string private constant _symbol = unicode"BOOMER";
    uint256 public _maxTxAmount =   2000000 * 10**_decimals;
    uint256 public _maxWalletSize = 2000000 * 10**_decimals;
    uint256 public _taxSwapThreshold= 1000000 * 10**_decimals;
    uint256 public _maxTaxSwap= 1000000 * 10**_decimals;
      bool private tradingOpen;
    bool private inSwap = false;
     bool private swapEnabled = false;
    event MaxTxAmountUpdated(uint _maxTxAmount);
    address private uniswapV2Pair;
    IUniswapV2Router02 private uniswapV2Router;
  
   
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _taxWallet = payable(_msgSender());
         _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[address(this)] = true;
         _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[_taxWallet] = true;
       
       

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

     function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function totalSupply() public pure override returns (uint256) {
        return _tTotal;
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

    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 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 _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 recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    
  

   

    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>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);

            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) 
            {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");

                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");

                if (firstBlock + 3  > block.number) {
                    require(!isContract(to));
                }
                _buyCount++;
            }

            if (to != uniswapV2Pair && ! _isExcludedFromFee[to]) 
            {
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
            }

            if(to == uniswapV2Pair && from!= address(this) )
            {
                taxAmount = amount.mul((_buyCount>_reduceSellTaxAt)?_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 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 addBot(address[] memory bots_) public onlyOwner {
        for (uint i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }

       function delBot(address[] memory notbot) public onlyOwner 
    {
      for (uint i = 0; i < notbot.length; i++) 
      {
          bots[notbot[i]] = false;
      }
    }

    function isContract(address account) private view returns (bool) 
    {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function removeMax() external onlyOwner{
        _maxTxAmount = _tTotal;
        _maxWalletSize=_tTotal;

        emit MaxTxAmountUpdated(_tTotal);
    }

    function isBot(address a) public view returns (bool){
      return bots[a];
    }

     
    function min(uint256 a, uint256 b) private pure returns (uint256){
      return (a>b)?b:a;
    }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }


    function enableTrade() 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;
        firstBlock = block.number;
    }

    
    receive() external payable {}

   

}

{
  "compilationTarget": {
    "BoomerGang.sol": "BoomerGang"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}