js抢红包代码

function generateRedPackets(totalAmount, numPackets) {
    let packets = [];
    let remainingAmount = totalAmount;
    let remainingPackets = numPackets;

    for (let i = 0; i < numPackets - 1; i++) {
        // 随机生成一个金额，确保剩余金额足够分配
        let amount = Math.random() * (remainingAmount / remainingPackets * 2);
        amount = parseFloat(amount.toFixed(2)); // 保留两位小数
        packets.push(amount);
        remainingAmount -= amount;
        remainingPackets--;
    }

    // 最后一个红包直接分配剩余金额
    packets.push(parseFloat(remainingAmount.toFixed(2)));

    return packets;
}

// 示例使用
let totalAmount = 100; // 总金额
let numPackets = 10; // 红包数量
let redPackets = generateRedPackets(totalAmount, numPackets);
console.log(redPackets);

const async = require('async');
const redis = require('redis');
const client = redis.createClient();

function grabRedPacket(userId, packetId) {
    return new Promise((resolve, reject) => {
        client.setnx(`lock:${packetId}`, userId, (err, reply) => {
            if (err) return reject(err);
            if (reply === 0) return resolve(false); // 已被锁定

            // 执行抢红包逻辑
            // ...

            client.del(`lock:${packetId}`); // 释放锁
            resolve(true);
        });
    });
}