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

contract WETH {
    string public name = "Wrapped Ethereum";
    string public symbol = "WETH";
    uint8 public decimals = 18;
    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    address public owner;

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

    constructor() {
        owner = msg.sender;
    }

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

    // Mint tokens (only owner)
    function mint(address to, uint256 amount) external onlyOwner {
        require(to != address(0), "Cannot mint to zero address");
        totalSupply += amount;
        balanceOf[to] += amount;
        emit Transfer(address(0), to, amount);
    }

    // Burn tokens
    function burn(uint256 amount) external {
        require(balanceOf[msg.sender] >= amount, "Insufficient balance to burn");
        balanceOf[msg.sender] -= amount;
        totalSupply -= amount;
        emit Transfer(msg.sender, address(0), amount);
    }

    // Deposit tokens (example use case)
    function deposit() external payable {
        require(msg.value > 0, "Must send Ether");
        balanceOf[msg.sender] += msg.value;
        emit Transfer(address(0), msg.sender, msg.value);
    }

    // Withdraw tokens (example use case)
    function withdraw(uint256 amount) external {
        require(balanceOf[msg.sender] >= amount, "Insufficient balance to withdraw");
        balanceOf[msg.sender] -= amount;
        payable(msg.sender).transfer(amount);
        emit Transfer(msg.sender, address(0), amount);
    }

    // Transfer tokens
    function transfer(address to, uint256 amount) external returns (bool) {
        require(to != address(0), "Cannot transfer to zero address");
        require(balanceOf[msg.sender] >= amount, "Insufficient balance");

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

    // Approve tokens for spending by another address
    function approve(address spender, uint256 amount) external returns (bool) {
        require(spender != address(0), "Cannot approve zero address");

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

    // Transfer tokens from one address to another
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool) {
        require(to != address(0), "Cannot transfer to zero address");
        require(balanceOf[from] >= amount, "Insufficient balance");
        require(allowance[from][msg.sender] >= amount, "Allowance exceeded");

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

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