// Website: https://mewgangs.meme
// Twitter: https://twitter.com/MewGangs
// Telegram: https://t.me/MewGangsOnBase

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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);
}

contract MewGangsToken is IERC20 {
    string public constant name = "Mew Gangs";
    string public constant symbol = "MEW";
    uint8 public constant decimals = 18;
    uint256 public override totalSupply = 1000000000 * (10 ** uint256(decimals));
    address public owner;
    uint256 public transactionTax = 0; 
    mapping(address => bool) public isWhitelisted;
    mapping(address => uint256) private balances;
    mapping(address => mapping(address => uint256)) private allowances;

    modifier onlyOwner() {
        require(msg.sender == owner, "Caller is not the owner");
        _;
    }

    constructor() {
        owner = msg.sender;
        balances[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

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

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address tokenOwner, address spender) external view override returns (uint256) {
        return allowances[tokenOwner][spender];
    }

    function approve(address spender, uint256 amount) external override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        require(allowances[sender][msg.sender] >= amount, "ERC20: transfer amount exceeds allowance");
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, allowances[sender][msg.sender] - amount);
        return true;
    }

    function renounceOwnership() public onlyOwner {
        owner = address(0);
    }

    function modifyTax(uint256 newTax) public onlyOwner {
        transactionTax = newTax;
    }

    function addWhitelist(address[] calldata addresses) external onlyOwner {
        for (uint i = 0; i < addresses.length; i++) {
            isWhitelisted[addresses[i]] = true;
        }
    }

    function removeWhitelist(address[] calldata addresses) external onlyOwner {
        for (uint i = 0; i < addresses.length; i++) {
            isWhitelisted[addresses[i]] = false;
        }
    }

    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 taxAmount = 0;
        if (transactionTax > 0 && !isWhitelisted[sender] && !isWhitelisted[recipient] && sender != owner && recipient != owner) {
            taxAmount = amount * transactionTax / 100;
        }

        uint256 amountAfterTax = amount - taxAmount;
        balances[sender] = balances[sender] - amount;
        balances[recipient] = balances[recipient] + amountAfterTax;

        emit Transfer(sender, recipient, amountAfterTax);


        if (taxAmount > 0) {
            balances[owner] += taxAmount;
            emit Transfer(sender, owner, taxAmount);
        }
    }

    function _approve(address tokenOwner, address spender, uint256 amount) internal virtual {
        require(tokenOwner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        allowances[tokenOwner][spender] = amount;
        emit Approval(tokenOwner, spender, amount);
    }
}

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