DragonByt

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

contract DragonByt {
    string public constant name = "DragonByt";
    string public constant symbol = "DRAGONBYT";
    uint256 public constant totalSupply = 1360000000 * 10**18; // 总发行量 13.6 亿，精度为 18
    uint8 public constant decimals = 18;
    address public owner;
    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;

    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[msg.sender] = totalSupply;
    }

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

    function transferOwnership(address newOwner) external onlyOwner {
        require(newOwner != address(0), "Invalid new owner address");
        owner = newOwner;
    }

    function renounceOwnership() external onlyOwner {
        owner = address(0);
    }

    function balanceOf(address _owner) external view returns (uint256 balance) {
        return balances[_owner];
    }

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

    function transferFrom(address _from, address _to, uint256 _value) external returns (bool success) {
        require(_to != address(0), "Invalid recipient address");
        require(balances[_from] >= _value, "Insufficient balance");
        require(allowed[_from][msg.sender] >= _value, "Not enough allowance");
        
        balances[_from] -= _value;
        balances[_to] += _value;
        allowed[_from][msg.sender] -= _value;
        
        emit Transfer(_from, _to, _value);
        return true;
    }

    function approve(address _spender, uint256 _value) external returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(address _owner, address _spender) external view returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }
}

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