// SPDX-License-Identifier: MIT pragma solidity ^0.8.0;

contract Avirao { string public name = "Avi"; string public symbol = "Avi"; uint8 public decimals = 18; uint256 public totalSupply = 1000000 * (10 ** uint256(decimals)); address public owner;

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

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

constructor() {
    owner = msg.sender;
    balances[owner] = totalSupply;
}

modifier onlyOwner() {
    require(msg.sender == owner, "Only the owner can call this function.");
    _;
}

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

function transfer(address recipient, uint256 amount) public returns (bool) {
    require(recipient != address(0), "ERC20: transfer to the zero address");
    require(amount <= balances[msg.sender], "ERC20: transfer amount exceeds balance");
   
    balances[msg.sender] -= amount;
    balances[recipient] += amount;
   
    emit Transfer(msg.sender, recipient, 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 transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
    require(recipient != address(0), "ERC20: transfer to the zero address");
    require(amount <= balances[sender], "ERC20: transfer amount exceeds balance");
    require(amount <= allowances[sender][msg.sender], "ERC20: transfer amount exceeds allowance");
   
    balances[sender] -= amount;
    balances[recipient] += amount;
    allowances[sender][msg.sender] -= amount;
   
    emit Transfer(sender, recipient, amount);
   
    return true;
}

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

function burn(uint256 amount) public returns (bool) {
    require(amount <= balances[msg.sender], "ERC20: burn amount exceeds balance");
   
    balances[msg.sender] -= amount;
    totalSupply -= amount;
   
    emit Transfer(msg.sender, address(0), amount);
   
    return true;
}

function mint(uint256 amount) public onlyOwner returns (bool) {
    require(totalSupply + amount <= 2**256 - 1, "ERC20: total supply exceeds uint256");
   
    balances[owner] += amount;
    totalSupply += amount;
   
    emit Transfer(address(0), owner, amount);
   
    return true;
}

}