// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract RoboVanToken {
    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;

    mapping(address => uint256) private balancesToken;
    mapping(address => mapping(address => uint256)) private allowancesToken;

    // ERC20 Events
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(
        address indexed tokenOwner,
        address indexed spender,
        uint256 value
    );

    constructor() {
        name = "ROBOVAN";
        symbol = "ROBOVAN";
        decimals = 18;
        totalSupply = 2123456789 * 10 ** 18;
        balancesToken[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

    // Function to transfer tokens
    function transfer(
        address recipient,
        uint256 amount
    ) external returns (bool) {
        require(balancesToken[msg.sender] >= amount, "can't transfer");
        require(recipient != address(0), "0x0");

        balancesToken[msg.sender] -= amount;
        balancesToken[recipient] += amount;

        emit Transfer(msg.sender, recipient, amount);
        return true;
    }

    // Function to approve spending on behalf of the owner
    function approve(address spender, uint256 amount) external returns (bool) {
        require(spender != address(0), "0x0");

        allowancesToken[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    // Function to transfer tokens using allowance
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool) {
        require(sender != address(0), "0x0");
        require(recipient != address(0), "0x0");
        require(balancesToken[sender] >= amount, "can't transfer");
        require(allowancesToken[sender][msg.sender] >= amount, "exceeded");

        balancesToken[sender] -= amount;
        balancesToken[recipient] += amount;
        allowancesToken[sender][msg.sender] -= amount;

        emit Transfer(sender, recipient, amount);
        return true;
    }

    // View function to get balance of an account
    function balanceOf(address addr) external view returns (uint256) {
        return balancesToken[addr];
    }

    // View function to get allowance between owner and spender
    function allowance(
        address addr,
        address user
    ) external view returns (uint256) {
        return allowancesToken[addr][user];
    }
}

{
  "compilationTarget": {
    "contracts/newToken/Token.sol": "RoboVanToken"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 300
  },
  "remappings": []
}