# wx.requestPayment(Object object)

with Promise style call: Supported

Mini Program plugin: Not supported

Initiate WeChat Pay. Before calling,Mini Program WeChat Official Platform -Function - Apply for access to WeChat Pay. For more information, you can refer to WeChat Pay Development Document：

Development Guidelines
Single interface
Payment interface
Old version (v2)
- Development Guidelines
- Payment interface

If usedCloud DevelopmentThen wx.requestPayment The required parameters can be obtained through cloud development WeChat payment unified single interface from authentication, and can be certificate free, signature free security call WeChat payment server interface, and receive asynchronous payment results callback, seeCloud Development WeChat Pay。

# parameter

# Object object

attribute	type	Default values	Required	Introductions
timeStamp	string		yes	Timestamp, from 1970 year 1 Moon 1 day 00:00:00 Number of seconds to date, the current time
nonceStr	string		yes	A random string of 32 characters or less in length
package	string		yes	Unified single interface returns prepay_id Parameter values in the format of prepay_id=***
signType	string	MD5	no	Signature algorithm, should be consistent with the value of the background order
paySign	string		yes	Signature, see WeChat payment documents
success	function		no	Interface calls the successful callback function
fail	function		no	Interface calls failed callback functions
complete	function		no	Callback function at the end of an interface call (both successful and unsuccessful calls are executed)

object.signType Legal value

value	Introductions	Minimum version
MD5	Only in v2 Version Interface
HMAC-SHA256	Only in v2 Version Interface
RSA	Only in v3 Version Interface

# sample code

wx.requestPayment({
  timeStamp: '',
  nonceStr: '',
  package: '',
  signType: 'MD5',
  paySign: '',
  success (res) { },
  fail (res) { }
})

Note: If the server has the use of cloud development, you can use cloud development WeChat paymentUnified ordersInterface to get all required parameters above without authentication. Example:

// Cloud function code
const cloud = require('wx-server-sdk')
cloud.init({
  The following are the following: cloud.DYNAMIC_CURRENT_ENV
})

exports.main = async (event, context) => {
  const res = await cloud.cloudPay.unifiedOrder({
    "body" : "Xiaoqiu TIT shop - supermarket,"
    "outTradeNo" : "1217752501201407033233368018",
    "spbillCreateIp" : "127.0.0.1",
    "subMchId" : "1900009231",
    "totalFee" : 1,
    "envId": "test-f0b102",
    "functionName": "pay_cb"
  })
  return res
}

// Mini Program code
wx.cloud.callFunction({
  name: 'function name'
  data: {
    // ...
  },
  success: res => {
    const payment = res.result.payment
    wx.requestPayment({
      ...payment,
      success (res) {
        console.log('pay success', res)
      },
      fail (err) {
        console.error('pay fail', err)
      }
    })
  },
  fail: console.error,
})