• Upgraded Realtime Database client to v0.2.0. With this upgrade developers can call the admin.database().ref() method with another Reference instance as the argument.
• Upgraded Cloud Firestore client to v0.13.0.

• The admin.initializeApp() method can now be invoked without a credential option. This prompts the SDK to use Google Application Default Credentials.
• Upgraded the Cloud Firestore client from 0.11.1 to 0.12.0.
• Upgraded the Cloud Storage client from 1.2.1 to 1.6.0.
• Upgraded the Firebase Database client from 0.1.3 to 0.1.11.

Firebase Cloud Messaging

• A new messaging.send() method for sending messaging messages.

• [changed] Exposed admin.firestore.DocumentReference and admin.firestore.DocumentSnapshot types from the Admin SDK typings.
• [changed] Upgraded Firestore dependency version to 0.11.2.

• This release upgrades the Cloud Firestore dependency version from 0.10.0 to 0.11.1, which includes several bug fixes in Cloud Firestore.

Initialization

• The admin.initializeApp() method can now be invoked without any arguments. This will initialize an app using Google Application Default Credentials, and other AppOptions loaded from the FIREBASE_CONFIG environment variable.

Authentication

• Upgraded the jsonwebtoken library to 8.1.0.

Authentication

• A new revokeRefreshTokens() method for revoking refresh tokens issued to a user.
• The verifyIdToken() method now accepts an optional checkRevoked argument, which can be used to check if a given ID token has been revoked.

• A new admin.instanceId() API that facilitates deleting instance IDs and associated user data from Firebase projects.
• Updated the TypeScript typings for admin.AppOptions to reflect the introduction of the projectId option.
• Removed some unused third party dependencies.
• Updated @google-cloud/firestore dependency to latest.

Cloud Firestore

• Upgraded the Cloud Firestore client to the latest available version, which adds input validation to several operations, and retry logic to handle network errors.

Realtime Database

• Fixed an issue in the TypeScript typings of the Realtime Database API.

Realtime Database

• app.database() method now optionally accepts a database URL. This feature can be used to access multiple Realtime Database instances from the same app.
• Upgraded the Realtime Database client to the latest available version.

Cloud Firestore

• Upgraded the Cloud Firestore client to the latest available version.