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Web3学习笔记:Day 3-智能合约进阶与 ERC-20 代币(实操部分A)

  • 2026-02-28 16:30:20
Web3学习笔记:Day 3-智能合约进阶与 ERC-20 代币(实操部分A)

昨天我分享了 ERC-20 代币代码代码实现的理论部分,今天将分享实操,具体包括:

  • • 使用 OpenZeppelin 库开发代币
  • • 实现一个完整的 ERC-20 代币合约
  • • 在Remix开发环境测试代币功能
  • • 部署代币到测试网并在钱包中查看
  • 所有的内容都是我亲自实操并测试通过,只要您按我的步骤来操作,一定会有成功体验。如果您遇到任何问题,欢迎在留言,我会尽力帮您解答,一起学习和进步。

步骤 1: 使用 OpenZeppelin 快速生成 ERC-20 (15分钟)

什么是 OpenZeppelin?

OpenZeppelin 是最流行的智能合约安全库,提供了经过审计的标准合约实现。

访问 OpenZeppelin Wizard

  1. 1. 打开 Wizard
    • • 访问:https://wizard.openzeppelin.com/
  2. 2. 配置代币
    • • 选择 "ERC20"
    • • 填写信息:
      • • Name: HorseToken (今年马年,搞一个马币,哈哈。)
      • • Symbol: HTK
      • • Premint: 1000000 (为deployer创建的初始额度)
    • • 勾选功能:
      • • ✅ Mintable(可铸造)
      • • ✅ Burnable(可销毁)
      • • ✅ Pausable(可暂停)
      • • ✅ Ownable(所有权控制)
  1. 1. 生成代码
    • • 点击 "Open in Remix"
    • • 代码会自动导入到 Remix

生成的代码

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.6.0
pragma solidity ^0.8.27;

import {Ownable} from "@openzeppelin/contracts@5.6.0/access/Ownable.sol";
import {ERC20} from "@openzeppelin/contracts@5.6.0/token/ERC20/ERC20.sol";
import {ERC20Burnable} from "@openzeppelin/contracts@5.6.0/token/ERC20/extensions/ERC20Burnable.sol";
import {ERC20Pausable} from "@openzeppelin/contracts@5.6.0/token/ERC20/extensions/ERC20Pausable.sol";

contract Horse is ERC20, ERC20Burnable, ERC20Pausable, Ownable {
    constructor(address recipient, address initialOwner)
        ERC20("Horse", "HTK")
        Ownable(initialOwner)
    {
        _mint(recipient, 1000000 * 10 ** decimals());
    }

    function pause() public onlyOwner {
        _pause();
    }

    function unpause() public onlyOwner {
        _unpause();
    }

    function mint(address to, uint256 amount) public onlyOwner {
        _mint(to, amount);
    }

    // The following functions are overrides required by Solidity.

    function _update(address from, address to, uint256 value)
        internal
        override(ERC20, ERC20Pausable)
    {
        super._update(from, to, value);
    }
}

理解代码结构:

  • • 阅读生成的代码,理解每个继承合约的作用
  • • 构造函数的作用:
    • • 初始化代币名称 "Horse" 和代码 "HTK"
    • • 设置合约所有者(initialOwner)
    • • 向 recipient 地址一次性铸造 1,000,000 个代币(考虑 decimal,通常 18 位小数)
  • • 注意 override 和 super 的使用

步骤 2: 测试代币功能 (15分钟)

编译合约

  1. 1. 点击左侧 "Solidity Compiler" 图标
  2. 2. 点击 "Compile contract......"

部署合约

  1. 1. 切换到 "Deploy & Run Transactions"
  2. 2. Environment 选择 "Remix VM (Cancun)"
  3. 3. 输入构造函数参数后点击 Deploy
  1. 4. 查看部署后的合约

快速验证

  • • 调用 name() 和 symbol() 验证基本信息
  • • 调用 balanceOf(你的地址) 查看初始余额

测试代币功能

1. 查询基本信息

# 点击 name()
# 预期输出: "Horse"

# 点击 symbol()
# 预期输出: "HTK"

# 点击 decimals()
# 预期输出: 18

# 点击 totalSupply()
# 预期输出: 1000000000000000000000000 (100万 * 10^18)


2. 查询余额

# 点击 balanceOf(你的地址)
# 预期输出: 1000000000000000000000000

3. 铸造测试

# 切换回 owner 账户

# 点击 mint(ower地址, 1024),注意,代码里面设定了只能给owner铸币
# 铸造 1024 个代币给另一个地址

# 查看总供应量增加


5. 暂停测试

# 点击 pause()
# 暂停所有转账

# 尝试转账
# 预期: 交易失败,显示 "Pausable: paused"

# 点击 unpause()
# 恢复转账


6. 销毁测试

# 点击 burn(91)
# 销毁 91 个代币

# 查看余额减少
# 查看总供应量减少

今天就分享到这儿,后续我将继续分享如何把合约部署到测试网。

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  1. CONNECT:[ UseTime:0.000981s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001910s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000720s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000723s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001503s ]
  6. SELECT * FROM `set` [ RunTime:0.000592s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001711s ]
  8. SELECT * FROM `article` WHERE `id` = 470766 LIMIT 1 [ RunTime:0.001135s ]
  9. UPDATE `article` SET `lasttime` = 1772297852 WHERE `id` = 470766 [ RunTime:0.001417s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000699s ]
  11. SELECT * FROM `article` WHERE `id` < 470766 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001138s ]
  12. SELECT * FROM `article` WHERE `id` > 470766 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001084s ]
  13. SELECT * FROM `article` WHERE `id` < 470766 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002082s ]
  14. SELECT * FROM `article` WHERE `id` < 470766 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002058s ]
  15. SELECT * FROM `article` WHERE `id` < 470766 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002421s ]
0.181267s