使用 Firebase 功能进行购买验证后无法更新 Firestore 的文档

Question

我一直在开发一个在服务器端验证购买的功能。一切正常。 只有一个问题，当购买有效时（response.status === 200）控制台显示（成功）但文档尚未更新。 这是我的代码。我错过了什么吗？

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const {google} = require('googleapis');
const publisher = google.androidpublisher('v2');
const authClient = new google.auth.JWT({
   email: 'my_email',
   key: 'my_key',
   scopes: ['https://www.googleapis.com/auth/androidpublisher']
});

admin.initializeApp();
admin.firestore().settings({timestampsInSnapshots: true});

exports.validatePurchases = functions.firestore
.document('purchases/{channel}')
.onCreate((docSnapshot, context) => {
    const purchase = docSnapshot.data();
    const order_id = purchase.orderId;
    const package_name = purchase.packageName;
    const sku = purchase.sku;
    const purchase_token = purchase.purchaseToken;
    const user_id = purchase.userId;

    authClient.authorize((err, result) => {
        if (err) {
            console.log(err);
        }
        publisher.purchases.subscriptions.get({
            auth: authClient,
            packageName: package_name,
            subscriptionId: sku,
            token: purchase_token
        }, (err, response) => {
            if (err) {
                console.log(err);
            }
            // Result Status must be equals to 200 so that the purchase is valid
            if (response.status === 200) {
                console.log('success');
                return admin.firestore().collection('users').doc(user_id).update({
                    purchaseToken: purchase_token,
                    isPremiumS: 'true'
                });                    
            } else {
                console.log('fail');
                return admin.firestore().collection('users').doc(user_id).update({
                    purchaseToken: purchase_token,
                    isPremiumS: 'false'
                });                    
            }
        });
    });
    return null;
});    

Answer 1

您的函数应该从您的 Firestore update() 调用中返回 Promise，而不是返回 null。

在两个地方添加return：

  return authClient.authorize((err, result) => {...

  return publisher.purchases.subscriptions.get({...

在函数末尾删除return null;