Skip to content

User Login with Firebase

In this guide, you will learn how a Vue app integrated with the Arcana Auth SDK and Firebase SDK can easily onboard users via custom login UI and Firebase as the authentication provider.


  • Make sure you can access the Arcana Developer Dashboard:

  • Use the Arcana Developer Dashboard to register the app and obtain a unique Client ID required for integrating the app with the Arcana Auth SDK.

  • Carefully follow the instructions to configure Firebase as the authentication provider.

  • Install the Firebase SDK and integrate the app as explained in the Firebase documentation for iOS apps, Android apps and web apps. Use Firebase authentication as per the Web3 app type, mobile or web app. Once a user is authenticated by Firebase, the developer must obtain the token and user identifier and provide it as input to the loginWithBearer function of the Arcana Auth SDK for onboarding users to Web3.

  • Install the Arcana Auth SDK and integrate the app with the Arcana Auth SDK by using the appropriate integration method as per the app type. After that follow the steps listed below and add code to onboard users to Web3 and enable them to sign blockchain transactions.


Using Firebase to onboard users in a Web3 app that is integrated with the Arcana Auth SDK is simple!

Just a single line of code!

Step 1: Call loginWithBearer function

Make sure that all the prerequisites listed above are met. The app should be successfully registered, configured, and integrated with both the Firebase SDK as well as the Arcana Auth SDK, before adding code to onboard users via Firebase.

import { initializeApp } from 'firebase/app'
import { getAuth, createUserWithEmailAndPassword, signInWithEmailAndPassword } from 'firebase/auth'
import { AuthProvider, BearerAuthentication } from '@arcana/auth'

const config = {
  apiKey: "AIzaSyBddysLWM9CcpNEVLbUz52YwyQL_uytQX0", // Obtain this after registering app at Firebase console
  authDomain: "", // Project ID Domain setting in the Firebase console
  projectId: "some-projectid-example-arc4n4-docx",
  storageBucket: "",
  messagingSenderId: "2xxxx318486297382",
  appId: "4:3184ddddddd7382:web:8b639axxxxxxxx39f85fe7",
  measurementId: "G-EGccccccLDR"

const firebaseApp = initializeApp(config)
const firebaseAuth = getAuth(firebaseApp)

//Create Arcana Auth Provider
// Get client ID 'xar_live_xxxxxx' from Arcana Developer Dashboard

const auth = new AuthProvider("xar_live_123940ytyoxxxxxxx343o404",{
  network: "mainnet", //change it to testnet or mainnet
export default {
  name: 'App',
  data: () => ({
    email: '',
    password: ''
  mounted () {
    AP.init().then((k) => console.log(k)).catch(e => console.error(e)) //Initialize the Auth Provider
  methods: {
    async ultimate (upm) {
        if (await AP.isLoggedIn()) {
          window.alert('Already logged in')
        await auth.loginWithBearer(BearerAuthentication.firebase, {
        uid: upm.user.uid,
        token: upm.user.accessToken
    async login () { //Sign in existing Firebase users
        const data = await signInWithEmailAndPassword(firebaseAuth,, this.password)
        console.log('Data:', data)
        return this.ultimate(data)
    async register () {  //Sign up new users with Firebase Auth
        const data = await createUserWithEmailAndPassword(firebaseAuth,, this.password)
        console.log('Data:', data)
        return this.ultimate(data)


Refer to the Sample Firebase Vue app integration example to see how the loginWithBearer function is used.

After onboarding users, developers can add code to access the other Arcana Auth SDK functions in the app. See Arcana Auth SDK Usage Guide for details.

That is all!

Your app is all set for authenticating users via Firebase. Authenticated users can instantly access the Arcana wallet to sign blockchain transactions.

No Aggregate Login with Firebase

The aggregate login feature does not work for the custom IAM providers such as Firebase.

If a user has the same email ID registered with say a social provider and with Firebase, logging into an app using Firebase will create a new unique user account even if the user uses the same email as the one used with a social provider or via the passwordless option. What this means is that the wallet address for the same user will be different when Firebase is used to log in and subsequently a social provider or passwordless login is used by the same user having the same email ID.

Arcana JWT Token

Upon successful authentication, Arcana Auth SDK returns a unique JWT token to the app called the Arcana JWT Token. App developers can use this token to verify user login and subsequently generate another token for app use. Learn more about how to verify the Arcana JWT Token for apps deployed on Testnet and Mainnet.

What's Next?

To know more about how to use Web3 wallet operations programmatically in your app, see Arcana wallet Developer's Guide. Refer to the Arcana wallet User's Guide for more information on how authenticated app users can access the wallet UI.

See also

Last update: June 21, 2023 by shaloo