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Contracts0xda5f162da142d744591b4c1c8a4d8141130442ba

Overview

GT Balance

0 GT($0)

Token Holdings

0 Tokens

More Info

Contract Creator

0x8d63bd...5b4e00cc

2 months ago

Contract Source Code Verified (Exact Match)

This contract was created by

0x8d63bd4b972794b67aa83cdaf09db5655b4e00cc

0x5395a3ef4452bb58a94430c6de35f47ceda677cb574e3ab26f6ce1f749c3eeaa

Contract Name

HelloWorld

Optimization

Yes, with

200

runs

Compiler

solidity

Compiler Version

v0.8.28+commit.7893614a.js

Other Settings

cancun

evmVersion

MIT

License

</> Contract source code

Show Bytecode

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title HelloWorld
 * @dev 一个简单的 HelloWorld 合约
 */
contract HelloWorld {
    string private message;
    address public owner;
    
    event MessageChanged(string oldMessage, string newMessage);
    
    constructor(string memory _message) {
        message = _message;
        owner = msg.sender;
    }
    
    /**
     * @dev 获取当前消息
     * @return 当前存储的消息
     */
    function getMessage() public view returns (string memory) {
        return message;
    }
    
    /**
     * @dev 设置新消息
     * @param _newMessage 新消息
     */
    function setMessage(string memory _newMessage) public {
        string memory oldMessage = message;
        message = _newMessage;
        emit MessageChanged(oldMessage, _newMessage);
    }
    
    /**
     * @dev 返回问候语
     * @return 格式化的问候语
     */
    function sayHello() public view returns (string memory) {
        return string.concat("Hello, ", message, "!");
    }
}

</> Contract Creation Bytecode

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</> Contract ABI

[{"inputs":[{"internalType":"string","name":"_message","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"oldMessage","type":"string"},{"indexed":false,"internalType":"string","name":"newMessage","type":"string"}],"name":"MessageChanged","type":"event"},{"inputs":[],"name":"getMessage","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sayHello","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_newMessage","type":"string"}],"name":"setMessage","outputs":[],"stateMutability":"nonpayable","type":"function"}]

</> Contract Deployment Bytecode

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</> Constructor arguments

0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000

Contract Source Code Verified (Exact Match)

</> Supports reading the following contract function information

1. getMessage (0xce6d41de)

2. owner (0x8da5cb5b)

3. sayHello (0xef5fb05b)