// 云函数代名称pay
const res = await cloud.cloudPay.unifiedOrder({
  "body": goodsInfo,
  "outTradeNo": (Math.random() * 10000000000 + new Date().getTime()).toFixed(0),
  "spbillCreateIp": "127.0.0.1",
  "subMchId": "*****",
  "totalFee": totalPrice,
  "envId": "*******",
  "functionName": "payCallback"
})

// 小程序端调用支付接口
pay(orderId, totalPrice) {
  wx.cloud.callFunction({
    name: "pay",
    data: {
      goodsInfo: "微信支付测试",
      totalPrice: 1
    }
  }).then(res => {
    const payment = res.result.payment
    wx.requestPayment({
      ...payment,
    }).then(res => {
      
    })
  }).catch(err => {
    console.log(err)
  })
},

payCallback回调函数没有被触发，基础库2.14.1