// SPDX-License-Identifier: MIT
pragma solidity ^0.8.25;

contract IvorToken {
    string public name = "Ivor";
    string public symbol = "Ivor";
    uint8 public decimals = 18;
    uint256 public totalSupply = 985474830 * (10 ** uint256(decimals));
    address public owner;
    bool public ownershipRenounced = false;

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

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    event OwnershipRenounced(address indexed previousOwner);

    modifier onlyOwner() {
        require(msg.sender == owner, "Not the contract owner");
        require(!ownershipRenounced, "Ownership has been renounced");
        _;
    }

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

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

    function transfer(address to, uint256 value) public returns (bool) {
        require(to != address(0), "Invalid address");
        require(balances[msg.sender] >= value, "Insufficient balance");
        
        balances[msg.sender] -= value;
        balances[to] += value;
        emit Transfer(msg.sender, to, value);
        return true;
    }

    function approve(address spender, uint256 value) public returns (bool) {
        require(spender != address(0), "Invalid address");

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

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


    function transferFrom(address from, address to, uint256 value) public returns (bool) {
        require(to != address(0), "Invalid address");
        require(balances[from] >= value, "Insufficient balance");
        require(allowances[from][msg.sender] >= value, "Allowance exceeded");

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

    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0), "Invalid address");
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

    function renounceOwnership() public onlyOwner {
        emit OwnershipRenounced(owner);
        owner = address(0);
        ownershipRenounced = true;
    }

    // SafeMath for security to avoid overflows (internal functions)
    function _safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "Addition overflow");
        return c;
    }

    function _safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "Subtraction overflow");
        return a - b;
    }
}

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