BTTC 通过新智能合约促进民主投票

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BTTC 通过新智能合约促进民主投票 - Blockchain.News

BitTorrent Inc. 在 BitTorrent Chain (BTTC) 上推出了一种新的投票智能合约，旨在通过确保透明和防篡改的投票来去中心化民主进程。根据 BitTorrent Inc.，该合约涵盖了候选人注册、投票和胜选者确定。

投票合约：数字民主的蓝图

投票合约经过精心设计，用于管理整个投票过程。关键组件包括：

结构体和状态变量

合约定义了结构和状态变量来存储投票数据：

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

contract Voting {
struct Voter {
string uid;
uint candidateIDVote;
}
struct Candidate {
string name;
string party;
bool doesExist;
}
uint numCandidates;
uint numVoters;
uint256 voteDeadline;
mapping(uint => Candidate) candidates;
mapping(uint => Voter) voters;
}

事件

在投票过程的关键节点上会触发事件：

event candidateRegistered(uint candidateID);
event voteRegistered(uint voterID, uint candidateID);

功能

设定和获取投票截止时间

function setVoteDeadline(uint256 _voteDeadline) public {
    voteDeadline = _voteDeadline;
}
function getVoteDeadline() public view returns (uint256) {
    return voteDeadline;
}

添加候选人

function addCandidate(string calldata name, string calldata party) public {
    numCandidates++;
    candidates[numCandidates] = Candidate(name, party, true);
    emit candidateRegistered(numCandidates);
}

投票

function vote(string calldata uid, uint candidateID) public {
    require(block.timestamp <= voteDeadline, "投票期已结束。");
    require(candidates[candidateID].doesExist, "候选人不存在。");
    numVoters++;
    voters[numVoters] = Voter(uid, candidateID);
    emit voteRegistered(numVoters, candidateID);
}

获得胜者

function getWinner() public view returns (string memory winnerName) {
    uint[] memory voteCounts = new uint[](numCandidates + 1);
    for (uint i = 1; i <= numVoters; i++) {
        voteCounts[voters[i].candidateIDVote]++;
    }
    uint winningVoteCount = 0;
    uint winningCandidateID = 0;
    for (uint i = 1; i <= numCandidates; i++) {
        if (voteCounts[i] > winningVoteCount) {
            winningVoteCount = voteCounts[i];
            winningCandidateID = i;
        }
    }
    return candidates[winningCandidateID].name;
}

获取候选人的总票数

function totalVotes(uint candidateID) public view returns (uint) {
    uint voteCount = 0;
    for (uint i = 1; i <= numVoters; i++) {
        if (voters[i].candidateIDVote == candidateID) {
            voteCount++;
        }
    }
    return voteCount;
}