Monopoly Coin

// SPDX-License-Identifier: MIT
// Monopoly Coin (MONO) is owned by Metanopoly, the core token of the Metanopoly ecosystem. 

pragma solidity ^0.8.0;

contract MonopolyCoin {

    // Token Information
    string public name = "Monopoly Coin";
    string public symbol = "MONO";
    uint8 public decimals = 18;
    uint256 private _totalSupply = 1_000_000_000 * (10 ** uint256(decimals)); // 1 Billion tokens

    // Mapping for balances and allowances
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    // Event declarations for Transfer, Approval, and Burn
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Burn(address indexed burner, uint256 value);

    // Contract owner address
    address public owner;

    // Modifier to restrict functions to only the contract owner
    modifier onlyOwner() {
        require(msg.sender == owner, "MonopolyCoin: caller is not the owner");
        _;
    }

    // Constructor to initialize the contract and assign total supply to the deployer's address
    constructor() {
        owner = msg.sender;  // The address that deploys the contract becomes the owner
        _balances[owner] = _totalSupply;  // Assign all tokens to the owner's address
        emit Transfer(address(0), owner, _totalSupply);  // Emit Transfer event for token allocation
    }

    // Public function to get the total supply of tokens
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    // Public function to check the balance of a specific address
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    // Public function to transfer tokens to another address
    function transfer(address recipient, uint256 amount) public returns (bool) {
        require(_balances[msg.sender] >= amount, "MonopolyCoin: insufficient balance for transfer");
        _balances[msg.sender] -= amount;
        _balances[recipient] += amount;
        emit Transfer(msg.sender, recipient, amount);  // Emit Transfer event
        return true;
    }

    // Public function to check the allowance for a spender
    function allowance(address owner_, address spender) public view returns (uint256) {
        return _allowances[owner_][spender];
    }

    // Public function to approve a spender to transfer tokens on behalf of the owner
    function approve(address spender, uint256 amount) public returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);  // Emit Approval event
        return true;
    }

    // Public function to transfer tokens from an address to another address via allowance
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        require(_balances[sender] >= amount, "MonopolyCoin: insufficient balance for transfer");
        require(_allowances[sender][msg.sender] >= amount, "MonopolyCoin: allowance exceeded");

        _balances[sender] -= amount;
        _balances[recipient] += amount;
        _allowances[sender][msg.sender] -= amount;
        emit Transfer(sender, recipient, amount);  // Emit Transfer event
        return true;
    }

    // Owner-only function to burn a specified amount of tokens
    function burn(uint256 amount) public onlyOwner {
        require(_balances[owner] >= amount, "MonopolyCoin: burn amount exceeds owner's balance");
        
        _balances[owner] -= amount;
        _totalSupply -= amount;  // Reduce total supply by the burned amount
        emit Burn(owner, amount);  // Emit Burn event
        emit Transfer(owner, address(0), amount);  // Transfer tokens to the zero address (burn)
    }

    // Function to check the contract owner's address
    function getOwner() public view returns (address) {
        return owner;
    }
}

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