firebase-ios-sdk/docs/FirebaseOptionsPerProduct.md

Firebase Options Usage By Product

Summarize which Firebase Options fields (and GoogleService-Info.plist attributes) are used by which Firebase products.

	An	ApC	ApD	Aut	Cor	Crs	DB	DL	Fst	Fn	IAM	Ins	Msg	MLM	Prf	RC	Str
apiKey		✅	✅	✅				✅			✅	✅			✅	✅
bundleID					✅										✅
clientID				✅
gcmSenderID											✅	✅	✅			✅
projectID		✅					✅		✅	✅		✅		✅	✅	✅
googleAppID	✅	✅		✅		✅	✅				✅	✅	✅		✅	✅	✅
databaseURL							✅
deepLinkURLScheme								✅
storageBucket																	✅

Rows (FirebaseOptions)

See FIROptions.m to see how the variables map to GoogleService-Info.plist attributes.

• apiKey: An API key used for authenticating requests from your Apple app
• bundleID: The bundle ID for the application (Not used by the SDK)
• clientID: The OAuth2 client ID for Apple applications used to authenticate Google users
• gcmSenderID: The Project Number from the Google Developer's console used to configure Google Cloud Messaging
• projectID: The Project ID from the Firebase console
• googleAppID: The Google App ID that is used to uniquely identify an instance of an app
• databaseURL: The realtime database root URL
• deepLinkURLScheme: The URL scheme used to set up Durable Deep Link service
• storageBucket: The Google Cloud Storage bucket name

Questions

• apiKey, projectID, gcmSenderID, projectID, and googleAppID seem to have overlapping functionality. Can they be consolidated?
• gcmSenderID is the second subfield of googleAppID. Can it be eliminated?
• bundleID seems to have three purposes: Performance SDK uses it. Messaging back end uses it. Core will generate an error message if it doesn't match the actual bundleID. Anything else?
• Why isn't deepLinkURLScheme set from the GoogleService-Info.plist field REVERSED_CLIENT_ID like other Firebase Options? The client code is required to explicitly set it.
• Is there a better way to manage the fields that are only used by one product? clientID, databaseURL, deepLinkURLScheme, and storageBucket.

Unused FirebaseOptions

Proposal: Deprecate these in the SDK and stop generating them for GoogleService-Info.plist.

• androidClientID
• trackingID

Unread GoogleService-Info.plist fields

Proposal: Stop generating these for GoogleService-Info.plist.

• PLIST_VERSION
  • Note: This is different from the <plist version="1.0"> declaration that is part of the Property List XML Schema.
• IS_ADS_ENABLED
• IS_ANALYTICS_ENABLED
• IS_APPINVITE_ENABLED
• IS_GCM_ENABLED
• IS_SIGNIN_ENABLED

Columns (Firebase Products)

• An - Analytics
• ApC - App Check
• ApD - App Distribution
• Aut - Auth
• Cor - Core
• Crs - Crashlytics
• DB - Real-time Database
• DL - Dynamic Links
• Fst - Firestore
• Fn - Functions
• IAM - In App Messaging
• Ins - Installations
• Msg - Messaging
• MLM - MLModel Downloader
• Prf - Performance
• RC - Remote Config
• Str - Storage