auth.getPaidUnionId

This interface should be called on the server side, as detailed in the Service Side API.

This interface supports cloud calls. Developer tool version required . . . 1.02.1904090 (latest stable download)
wx-server-sdk >= 0.4.0

After the user pays, obtain the user's UnionId without user authorization. This interface supports third-party platform proxy queries.

• Note: The user is required to complete the payment before the call and is valid for five minutes after payment.

How to call:

• HTTPS call
• Cloud calls

HTTPS call

The request address

GET https://api.weixin.qq.com/wxa/getpaidunionid?access_token=ACCESS_TOKEN&openid=OPENID

Request parameters

Returns a value

Object

The returned JSON packet

The legal value of errcode

Instructions for use

Choose between the following two options.

1. WeChat payment order number (transaction_id):

https://api.weixin.qq.com/wxa/getpaidunionid?access_token=ACCESS_TOKEN&openid=OPENID&transaction_id=TRANSACTION_ID

1. WeChat payment merchant order number and WeChat payment merchant (OUT_TRADE_NO and MCH_ID):

 https://api.weixin.qq.com/wxa/getpaidunionid?access_token=ACCESS_TOKEN&openid=OPENID&mch_id=MCH_ID&out_trade_no=OUT_TRADE_NO

Return an example of the data

{
  "unionid": "oTmHYjg-tElZ68xxxxxxxxhy1Rgk",
  "errcode": 0,
  "errmsg": "ok"
}

Cloud calls

Cloud calling is the ability provided by the small program Cloud Development to invoke WeChat's open interface in cloud functions and needs to be used in cloud functions via wx-server-sdk.

The interface method

openapi.auth.getPaidUnionId

Permissions for the auth.getPaidUnionId API need to be configured in config.json, details

Request parameters

Returns a value

Object

The returned JSON packet

The legal value of errCode

Abnormal

Object

The exception thrown

The legal value of errCode

An example of a request

const cloud = require('wx-server-sdk')
cloud.init()
exports.main = async (event, context) => {
  try {
    const result = await cloud.openapi.auth.getPaidUnionId({
        openid: '',
        transactionId: '',
        mchId: '',
        outTradeNo: ''
      })
    return result
  } catch (err) {
    return err
  }
}

Return an example of the data

{
  "unionid": "oTmHYjg-tElZ68xxxxxxxxhy1Rgk",
  "errCode": 0,
  "errMsg": "openapi.auth.getPaidUnionId:ok"
}