Provider Guides

Firebase Project

Firebase provides push notifications and phone-OTP for all three apps. Create one project and register each app in it.

1. Create the project

console.firebase.google.com → Add project.
Name it and finish the wizard. (It links to a Google Cloud project of the same name.)

2. Register your apps

Add an Android (and iOS) app for each of the three apps — they have different package names:

Customer

your customer package, e.g. com.yourcompany.shop

Delivery

your delivery package, e.g. com.yourcompany.delivery

Seller

your seller package, e.g. com.yourcompany.seller

For each Android app, download google-services.json; for each iOS app, download GoogleService-Info.plist, and place them in that app's project (see each app's Firebase page).

3. Add SHA fingerprints (Android)

Google Sign-In and phone-OTP need your app's signing fingerprints. In each Android app's settings, add the SHA-1 and SHA-256:

# debug
keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android
# release — from your release keystore
keytool -list -v -keystore your-release.keystore -alias your-alias

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If you use Play App Signing, also add the SHA-1/256 that Google Play shows under App integrity — otherwise Google login breaks for store installs.

4. Enable Phone authentication

Build → Authentication → Sign-in method → enable Phone. (Used for Firebase OTP.)

5. Service-account key (for push)

⚙️ Project settings → Service accounts → Generate new private key. This JSON goes into the admin panel — see Push Notifications (FCM).

6. iOS APNs key

For iOS push, create an APNs Auth Key in the Apple Developer portal and upload it under Firebase → Project settings → Cloud Messaging.

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Related: FCM Push · Firebase OTP · each app's "Firebase" page.