NDARQ (NDARQ)

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

contract NDARQ {
    string public name = "NDARQ";
    string public symbol = "NDARQ";
    uint8 public decimals = 18;
    uint256 public totalSupply;

    mapping(address => uint256) private balances;
    mapping(address => mapping(address => uint256)) private allowances;

    address public owner;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

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

    constructor() {
        owner = msg.sender;
        _mint(msg.sender, 100000000 * (10 ** uint256(decimals))); // 100,000,000 tokens
    }

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

    function transfer(address to, uint256 amount) public returns (bool) {
        require(to != address(0), "Invalid address");
        require(balances[msg.sender] >= amount, "Not enough balance");

        balances[msg.sender] -= amount;
        balances[to] += amount;
        emit Transfer(msg.sender, to, amount);
        return true;
    }

    function approve(address spender, uint256 amount) public returns (bool) {
        allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function allowance(address accountOwner, address spender) public view returns (uint256) {
        return allowances[accountOwner][spender];
    }

    function transferFrom(address from, address to, uint256 amount) public returns (bool) {
        require(to != address(0), "Invalid address");
        require(balances[from] >= amount, "Not enough balance");
        require(allowances[from][msg.sender] >= amount, "Allowance exceeded");

        balances[from] -= amount;
        balances[to] += amount;
        allowances[from][msg.sender] -= amount;
        emit Transfer(from, to, amount);
        return true;
    }

    // Owner can mint more tokens
    function mint(address to, uint256 amount) public onlyOwner {
        _mint(to, amount);
    }

    // Owner can burn tokens from any account
    function burn(address from, uint256 amount) public onlyOwner {
        require(balances[from] >= amount, "Not enough balance");
        balances[from] -= amount;
        totalSupply -= amount;
        emit Transfer(from, address(0), amount);
    }

    // Internal mint function
    function _mint(address to, uint256 amount) internal {
        require(to != address(0), "Invalid address");
        totalSupply += amount;
        balances[to] += amount;
        emit Transfer(address(0), to, amount);
    }
}