云函数

安装 tenpay模块

/cloud/pay/index.js

//云开发实现支付 
const cloud = require("wx-server-sdk")
cloud.init()

//1.引入支付的三方依赖
const tenpay = require('tenpay')
//2. 配置支付信息
const config = {
    appid: '你的小程序appid',
    mchid: '你的微信商户号',
    partnerKey: '微信支付安全密钥',
    notify_url: '支付回调网址,这里可以先随意填一个网址',
    spbill_create_ip: '127.0.0.1'
}

exports.main = async(event,context) => {
    const wxContext = cloud.getWXContext()
    let {
        orderid,
        money
    } = event;
    // 3. 初始化支付 
    const api = tenpay.init(config);

    let result = await api.getPayParams({
        out_trade_no: orderid,
        body: '商品简单描述',
        total_fee: money, //订单金额(分),
        openid: wxContext.OPENID //付款用户的openid
    })
    return result;
}

小程序端

wxml

<form bindsubmit="formSubmit">
  <view class="section">
    <input name="orderid" placeholder="please input here" value="111111111112"/>
  </view>
  <view class="section">
    <input name="money" placeholder="please input here" value="12"/>
  </view>
  <view class="btn-area">
    <button formType="submit">Submit</button>
  </view>
</form>

js

Page({
  formSubmit: function (e) {
    let formData = e.detail.value
    console.log('form发生了submit事件，携带数据为：', formData)
    wx.cloud.callFunction({
      name: 'pay',
      data: {
        orderid: "" + formData.orderid,
        money: formData.money
      },
      success: res => {
        console.log('提交成功', res.result);
        this.pay(res.result)
      },
      fail: res => {
        console.log('提交失败', res);
      }
    })
  },
  //实现小程序支付 
  pay(payData) {
    //官方标准的支付方法
    wx.requestPayment({
      timeStamp: payData.timeStamp,
      nonceStr: payData.nonceStr,
      package: payData.package, //统一下单接口返回的prepay_id 格式如：prepay_id= ***
      signType: 'MD5',
      paySign: payData.paySign, //签名
      success(res) {
        console.log('支付成功', res);
      },
      fail(res) {
        console.log('支付失败', res);
      },
      complete(res) {
        console.log('支付完成', res);
      },
    })
  }
})