JavaScript Bridge

Google In-App Purchase Bridge

Start a Google Play Billing purchase and receive a purchase token for server verification.

Before you start

Choose the product
Use the exact Play Console product ID and specify inapp or subscription through the supported product_type values.
Start the purchase
Call webtoapp.googleIap(options) or send google_iap_init.
Receive the result
Handle webtoapp:google-iap or webtoapp.onmessage. Successful responses include purchase details and token data.
Verify server-side
The app acknowledges non-consumables and subscriptions or consumes consumables after Google Play confirms the purchase. Still send the purchase token and product ID to your backend, verify with the Google Play Developer API, and only then grant durable entitlement.

webtoapp.googleIap({
  product_id: "premium_monthly",
  product_type: "subscription",
  app_account_token: "550e8400-e29b-41d4-a716-446655440000"
});