MastraAuthFirebase class

The MastraAuthFirebase class provides authentication for Mastra using Firebase Authentication. It verifies incoming requests using Firebase ID tokens and integrates with the Mastra server using the auth option.

Usage examples

Basic usage with environment variables

src/mastra/index.ts

import { Mastra } from '@mastra/core'
import { MastraAuthFirebase } from '@mastra/auth-firebase'

// Automatically uses FIREBASE_SERVICE_ACCOUNT and FIRESTORE_DATABASE_ID env vars
export const mastra = new Mastra({
  server: {
    auth: new MastraAuthFirebase(),
  },
})

Custom configuration

src/mastra/index.ts

import { Mastra } from '@mastra/core'
import { MastraAuthFirebase } from '@mastra/auth-firebase'

export const mastra = new Mastra({
  server: {
    auth: new MastraAuthFirebase({
      serviceAccount: '/path/to/service-account-key.json',
      databaseId: 'your-database-id',
    }),
  },
})

Constructor parameters

serviceAccount?:

string

= process.env.FIREBASE_SERVICE_ACCOUNT

Path to the Firebase service account JSON file. This file contains the credentials needed to verify Firebase ID tokens on the server side.

databaseId?:

string

= process.env.FIRESTORE_DATABASE_ID || process.env.FIREBASE_DATABASE_ID

The Firestore database ID to use. Typically '(default)' for the default database.

name?:

string

= "firebase"

Custom name for the auth provider instance.

authorizeUser?:

(user: FirebaseUser) => Promise<boolean> | boolean

Custom authorization function to determine if a user should be granted access. Called after token verification. By default, checks for the presence of a document in the 'user_access' collection keyed by the user's UID.

Environment variables

The following environment variables are automatically used when constructor options aren't provided:

FIREBASE_SERVICE_ACCOUNT?:

string

Path to Firebase service account JSON file. Used if serviceAccount option is not provided.

FIRESTORE_DATABASE_ID?:

string

Firestore database ID. Primary environment variable for database configuration.

FIREBASE_DATABASE_ID?:

string

Alternative environment variable for Firestore database ID. Used if FIRESTORE_DATABASE_ID is not set.

Default authorization behavior

By default, MastraAuthFirebase uses Firestore to manage user access:

1. After successfully verifying a Firebase ID token, the authorizeUser method is called
2. It checks for the existence of a document in the user_access collection with the user's UID as the document ID
3. If the document exists, the user is authorized; otherwise, access is denied
4. The Firestore database used is determined by the databaseId parameter or environment variables

Firebase user type

The FirebaseUser type used in the authorizeUser function corresponds to Firebase's DecodedIdToken interface, which includes:

• uid: The user's unique identifier
• email: The user's email address (if available)
• email_verified: Whether the email is verified
• name: The user's display name (if available)
• picture: URL to the user's profile picture (if available)
• auth_time: When the user authenticated
• And other standard JWT claims

Related

MastraAuthFirebase Class