/firebase-mobile-payments

Firebase Cloud Functions to create payments in native Android and iOS applications.

Primary LanguageKotlinMIT LicenseMIT

This project is inactive and is no longer being maintained.

Firebase mobile payments: Android & iOS with Cloud Functions for Firebase

This example includes Firebase Cloud Functions to create payments in native Android and iOS (coming soon) applications.

Features:

  • Android client
  • iOS SwiftUI client
  • Functions
    • Create a customer object when a users signs up via Firebase Authentication and add a customer entry to Cloud Firestore: createStripeCustomer
    • Callable functions to create a short-lived ephemeral keys for the SDK's prebuilt UI components: createEphemeralKey
    • Function to create a PaymentIntent when a new payment doc is added to Cloud Firestore: createStripePayment
    • Webhook handler function to keep Cloud Firestore in sync with Stripe: handleWebhookEvents
    • When a user is deleted from Firebase Authentication, delete thir data in Cloud Firestore and their customer object in Stripe: cleanupUser
Video tutorial: Android Link to video tutorial

Recommended usage

Please note that when selling digital products or services within your app, (e.g. subscriptions, in-game currencies, game levels, access to premium content, or unlocking a full version), you must use the app store's in-app purchase APIs instead. See Apple's and Google's guidelines for more information.

Deploy and test

  • Create a Firebase Project using the Firebase Developer Console
  • Enable billing on your project by switching to the Blaze or Flame plan. See pricing for more details. This is required to be able to do requests to non-Google services.
  • Enable Google & Email sign-in in your authentication provider settings.
  • Install Firebase CLI Tools if you have not already and log in with firebase login.
  • Configure this sample to use your project using firebase use --add and select your project.
  • Install dependencies locally by running: cd functions; npm install; cd -
  • Add your Stripe API Secret Key to Firebase config: 
    firebase functions:config:set stripe.secret=<YOUR STRIPE SECRET KEY>
  • Deploy your project using cd functions; npm run deploy; cd -

Setting up webhooks

  • Run firebase open functions to open the Firebase console.
  • Copy the URL for the handleWebhookEvents functions (e.g. https://region-project-name.cloudfunctions.net/handleWebhookEvents)
  • Create a new webhook endpoint with the URL in the Stripe Dashboard
  • Copy the signing secret (whsec_xxx) and add it to Firebase config: 
    firebase functions:config:set stripe.webhooksecret=<YOUR WEBHOOK SECRET>
  • Redeploy the handleWebhookEvents function: firebase deploy --only functions:handleWebhookEvents

Accepting live payments

Once you’re ready to go live, you will need to exchange your test keys for your live keys. See the Stripe docs for further details.

  • Update your Stripe secret config: 
    firebase functions:config:set stripe.secret=<YOUR STRIPE LIVE SECRET KEY>
  • Set your live publishable key in your respective client integration.
  • Follow the Setting up webhooks from above for live mode.
  • Redeploy the functions for the changes to take effect cd functions; npm run deploy; cd -.

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