小程序接入微信支付

// 这里的数据是后端返回的订单数据
const wechatOrder = {
    orderInfo: {
        appid: "wx1e**********689f",
        noncestr: "2rxK********Gv3A",
        package: "Sign=WXPay",
        partnerid: "16****039",
        prepayid: "wx13************c615acf50000",
        timestamp: "1663061271",
        sign: "3513ECA3B3AC1AD6F7D8BA748970D51D2236589734518F086AB99673AAE844FE",
    },
}

npm i crypto-js

import crypto from "crypto-js/crypto-js"

const timeStamp = Math.floor(new Date().getTime() / 1000)
const key = "53E12F838************5A43C5DC3"
// 二次签名
const sign = `appId=${appid}&nonceStr=${wechatOrder.orderInfo.nonce_str}&package=prepay_id=${wechatOrder.orderInfo.prepay_id}&signType=HMAC-SHA256&timeStamp=${timeStamp}&key=${key}`

wx.requestPayment({
    timeStamp: timeStamp + "", // 时间戳（单位：秒）
    nonceStr: wechatOrder.orderInfo.nonce_str, // 随机字符串
    package: `prepay_id=${wechatOrder.orderInfo.prepay_id}`, // 固定值
    signType: "HMAC-SHA256", // 固定值
    paySign: crypto.enc.Hex.stringify(crypto.HmacSHA256(sign, key)).toUpperCase(),
    success(res) {
        console.log("success:" + JSON.stringify(res))
        console.log("支付成功")
        showToast({
            title: "支付成功",
        })
    },
    fail(err) {
        console.log("fail:" + JSON.stringify(err))
        console.log("支付失败")
        showErrorMsgModal({
            content: err,
        })
    },
})

const partnerid = "160*****39"
const key = "53E12F838************5A43C5DC3"
// 报错支付场景不合法
const appid = wechatOrder.orderInfo.appid
const timeStamp = Math.floor(new Date().getTime() / 1000) + ""
const sign = `appid=${appid}&noncestr=${wechatOrder.orderInfo.nonce_str}&package=Sign=WXPay&partnerid=${partnerid}&prepayid=${wechatOrder.orderInfo.prepay_id}&timestamp=${timeStamp}&key=${key}`

const orderInfo = {
    appid, // 微信开放平台 - 应用 - AppId，注意和微信小程序、公众号 AppId 可能不一致
    noncestr: wechatOrder.orderInfo.nonce_str, // 随机字符串
    package: "Sign=WXPay", // 固定值
    partnerid, // 微信支付商户号
    prepayid: wechatOrder.orderInfo.prepay_id, // 统一下单订单号
    timestamp: timeStamp, // 时间戳（单位：秒）
    sign: crypto.enc.Hex.stringify(crypto.HmacSHA256(sign, key)), // 签名，这里用的 MD5/RSA 签名
}
uni.requestPayment({
    provider: "wxpay",
    orderInfo,
    success: (res) => {
        console.log("调用微信支付", res)
    },
    fail: (err) => {
        console.log("调用支付失败", err)
    },
    complete(complete) {
        console.log("complete", complete)
    },
})