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
Send the purchase token and product ID to your backend, verify with Google Play Developer API, acknowledge or consume as required, then grant entitlement.

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