Firebase app initialization fails with invalid-credential (firebase function initiatlization)

Question

If you are using the Node.js Admin SDK in a Cloud Function, you can automatically initialize the SDK through the functions.config() variable:

admin.initializeApp(functions.config().firebase);

But when I try this very simple piece of code:

const functions = require('firebase-functions')
const admin = require('firebase-admin')

admin.initializeApp(functions.config().firebase)

exports.orhub = functions.https.onRequest((req, res) => {
    res.end()
})

I get the following error:

error: FIREBASE WARNING: {"code":"app/invalid-credential","message":"Credential implementation provided to initializeApp() via the \"credential\" property failed to fetch a valid Google OAuth2 access token with the following error: \"Error fetching access token: invalid_grant (Bad Request)\". There are two likely causes: (1) your server time is not properly synced or (2) your certificate key file has been revoked. To solve (1), re-sync the time on your server. To solve (2), make sure the key ID for your key file is still present at https://console.firebase.google.com/iam-admin/serviceaccounts/project. If not, generate a new key file at https://console.firebase.google.com/project/_/settings/serviceaccounts/adminsdk."}

My Ubuntu pc has date and timezone automatically synced, so that's not the problem. I created this project today, so I got the latest modules.

So, what's the problem? Isn't "Cloud Functions" mentioned in the docs the same as Firebase functions?

Are you running this deployed to Cloud Functions, or in the local emulator via the Firebase CLI? — Doug Stevenson
– Doug Stevenson, Commented Feb 6, 2018 at 3:36

JxDarkAngel · Accepted Answer · 2019-10-31 00:48:17Z

10

I had the same problem, and I solved it as follows:

Go to the firebase console / Settings / Service accounts
Click on the option of [ Generate new private key ]
Load the file to the project

Implementation code:

const admin = require('firebase-admin');

var serviceAccount = require('PATH/file_private_key.json');

admin.initializeApp({
    credential: admin.credential.cert(serviceAccount),
    databaseURL: "https://DATA_BASE_URL.firebaseio.com"
});

More info: https://firebase.google.com/docs/database/admin/start

edited Oct 31, 2019 at 0:48

answered Oct 31, 2019 at 0:41

JxDarkAngel

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2 Comments

Olivier Lourme Over a year ago

How do you perform Bullet #3 "Load the file to the project" with GCP console or Firebase Console ?

Wilson Feb 2 at 12:50

this has worked pretty well for me

Peter · Accepted Answer · 2018-05-22 07:16:35Z

4

Since version 5.9.1 of firebase-admin it's possible to call initializeApp without any arguments. See release notes here. I would suggest updating to the latest version.

answered May 22, 2018 at 7:16

Peter

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2 Comments

Djarid Over a year ago

Nor for me. But authenticating properly as per firebase.google.com/docs/admin/setup?hl=en-419 did

to-b Over a year ago

see my answer below

hamed hossani · Accepted Answer · 2019-02-06 12:27:41Z

2

Firebase SDK for Cloud Functions upgrade guide: beta to version 1.0 or higher https://firebase.google.com/docs/functions/beta-v1-diff

New initialization syntax for firebase-admin firebase-admin is now initialized without any parameters within the Cloud Functions runtime.

Before (<= v0.9.1)

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

Now (>= v1.0.0)

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();

answered Feb 6, 2019 at 12:27

hamed hossani

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1 Comment

NaturalDevCR Over a year ago

This is not working for me... i get the following error: Error updating user: { Error: Credential implementation provided to initializeApp() via the "credential" property failed to fetch a valid Google OAuth2 access token with the following error: "Error fetching access token any hints?

to-b · Accepted Answer · 2022-06-21 09:42:43Z

0

in my case, i use GOOGLE_APPLICATION_CREDENTIALS env variable to set the path to json settings file
and in my firebase service file i write:

var admin = require("firebase-admin");

admin.initializeApp({
  credential: admin.credential.applicationDefault(),
});

module.exports = admin

To slove this bug i need to add in app.js / server.js the line:

require('dotenv').config();

That way firebase will be able to recognize and use env variables.
all bs"d

answered Jun 21, 2022 at 9:42

to-b

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Comments

Matty Nowak · Accepted Answer · 2024-05-14 11:27:36Z

0

I had similar problem when I was configuring my project on new PC. I checked all settings and it was proper. Finaly restarting my system helped :)

answered May 14, 2024 at 11:27

Matty Nowak

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