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smart_contract_vote's Introduction

案例

  • 我们创建一个简单的投票合约。
  • 投票合约允许选民对不同的候选人进行投票,并查看每个候选人的得票情况。
  • Solidity 实现的简化版本

技术解析:

  • 结构体和映射:使用结构体 Candidate 存储每个候选人的信息,使用映射 hasVoted 记录每个地址是否已经投票。

  • 数组和循环:使用数组 candidates 存储所有候选人,通过循环初始化候选人信息。

  • 合约构造函数:构造函数初始化合约的所有者、投票截止时间和候选人数组。

  • 时间戳和截止时间检查:使用 block.timestamp 获取当前时间戳,确保投票在截止时间之前进行。

  • 事件:使用事件 Voted 记录投票信息,方便外部监听。

  • 权限控制:确保只有未投票的地址才能进行投票,以及只有合约的所有者才能初始化合约。

这个例子涵盖了 Solidity 中的一些基本概念,包括结构体、映射、数组、循环、合约构造函数、时间戳和事件。在实际开发中,还需考虑更多方面的安全性和优化。

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