Google setup

End-to-end walkthrough: get the credentials from Google Cloud + Play Console, install them in Attesto, verify a real test purchase. Google's flow has more moving parts than Apple's — both Cloud Console and Play Console are involved.

What you need

1. A Google Cloud service account with the Play Android Developer role on the Play Console account that owns your app
2. The service-account JSON key file
3. The app's package name (com.example.app)
4. A test purchase token (optional until smoke-test time)

Step 1 — Create the service account in Google Cloud

In the Google Cloud Console:

1. IAM & Admin → Service Accounts → choose the right project (or create one if you haven't yet — it's free)
2. Create Service Account
   • Service account name: e.g. attesto-prod
   • Description: Verifies in-app purchases via Attesto
   • Click Create and continue
3. Grant access — leave this empty. The role you need is granted in Play Console (next step), not in Cloud Console.
4. Done → the service account is created with an email like attesto-prod@your-project-12345.iam.gserviceaccount.com. Copy it.

Generate the JSON key

5. Click the new service account → Keys tab → Add Key → Create new key → JSON

Download the JSON once

The private key inside this JSON is shown only at download time. If you lose it, you can reissue (creating a new key file) but cannot re-download the original. Save the file to a password manager.

The downloaded file looks like:

{
  "type": "service_account",
  "project_id": "your-project-12345",
  "private_key_id": "abc123…",
  "private_key": "-----BEGIN PRIVATE KEY-----\nMIIEvQIBADANBgkqh…\n-----END PRIVATE KEY-----\n",
  "client_email": "attesto-prod@your-project-12345.iam.gserviceaccount.com",
  "client_id": "…",
  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
  "token_uri": "https://oauth2.googleapis.com/token",
  …
}

Step 2 — Grant Play Console access

In Google Play Console:

1. Users and permissions (in the left sidebar; you may need to scroll)
2. Invite new user → paste the service account email from above
3. Permissions tab → grant app permissions for the apps you want Attesto to verify
   • At minimum: View app information and download bulk reports and View financial data, orders, and cancellation survey responses
   • These cover both subscription and one-shot product verification
4. Send invitation

You don't accept the invitation

Service accounts don't have a UI; the invitation is auto-applied based on their email. Just sending it is enough.

The OAuth scope Attesto requests on your behalf is https://www.googleapis.com/auth/androidpublisher. You don't configure this anywhere — it's baked into every OAuth token exchange.

Step 3 — Note your package name

Your app's package name is the unique reverse-DNS string you registered. Find it in:

• Play Console → All apps → click your app → Settings → App details → Package name (top of the page)
• Or in the AndroidManifest.xml: <manifest package="com.example.app">

Step 4 — Install the credentials

mise run cli -- google:set-credentials tenant_01HXY... \
  --package-name com.example.app \
  --service-account-path ~/Downloads/service-account-12345.json \
  --pubsub-audience https://attesto.yourdomain.com/v1/webhooks/google/tenant_01HXY...

For self-hosted Docker:

docker compose exec attesto attesto google:set-credentials tenant_01HXY... \
  --package-name com.example.app \
  --service-account-path /tmp/service-account.json

(You'll need docker cp first to get the JSON into the container.)

Options

Flag	Meaning
--package-name	Must exactly match the app's package
--service-account-path	Filesystem path to the downloaded JSON
--pubsub-audience	Strongly recommended if you'll use Google webhooks. The full callback URL Attesto exposes for this tenant.

Why --pubsub-audience matters

When set, Attesto rejects any inbound Pub/Sub JWT whose aud claim doesn't match. Without it, Attesto accepts any valid Google-signed JWT — meaning any Google service account anywhere could in principle POST to your tenant's webhook endpoint with valid-looking authentication. Set it unless you've restricted your webhook endpoint via network-layer controls.

The audience is typically the full webhook URL:

https://attesto.yourdomain.com/v1/webhooks/google/tenant_01HXY...

(Set the same value on the Google Pub/Sub push subscription — Webhooks covers this.)

What gets stored

The CLI validates the JSON is a real Google service-account file (checks type=service_account + required fields like client_email and private_key) before encrypting. The full JSON content is encrypted with AES-256-GCM under an HKDF-derived subkey scoped to google_credentials.service_account — distinct from the Apple .p8 subkey, so compromise of one plaintext does not weaken the other.

Output (deliberately omits the raw JSON and the client_email to reduce accidental paste-into-chat risk):

{
  "tenantId": "tenant_01HXY...",
  "packageName": "com.example.app",
  "updatedAt": "2026-04-25T..."
}

Step 5 — Verify a purchase

To get a test purchase token:

1. Set up a licensed tester account in Play Console → Settings → License testing → add the Google account you'll test with
2. Create an internal-track or closed-track release of your app (the tester account needs to be in that track's testers list)
3. Make a purchase with the tester account in the released app. The client receives a purchaseToken — it's a long opaque string.

Then verify:

curl -X POST http://localhost:8080/v1/google/verify \
  -H "Authorization: Bearer $ATTESTO_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "packageName": "com.example.app",
    "productId": "premium_monthly",
    "purchaseToken": "<long-opaque-string-from-the-client>",
    "type": "subscription"
  }'

Body fields (all required)

Field	Meaning
packageName	Must match the tenant's configured package
productId	The product / base plan the user bought
purchaseToken	The opaque token your mobile client received from Google Play Billing Library
type	"subscription" for auto-renewing subs, "product" for one-shot purchases

Subscription response

{
  "valid": true,
  "purchase": {
    "kind": "androidpublisher#subscriptionPurchaseV2",
    "packageName": "com.example.app",
    "productId": "premium_monthly",
    "purchaseToken": "...",
    "startTime": "2026-04-10T14:22:10.000Z",
    "expiryTime": "2026-05-10T14:22:10.000Z",
    "autoRenewing": true,
    "priceCurrencyCode": "USD",
    "priceAmountMicros": "9990000",
    "countryCode": "US",
    "paymentState": null,
    "acknowledgementState": 1,
    "orderId": "GPA.1234-5678-9012-34567",
    "rawResponse": {/* full SubscriptionPurchaseV2 from Google */}
  }
}

Multi-line-item subscriptions

The envelope fields (expiryTime, autoRenewing, priceAmountMicros) reflect only the first line item. Subscriptions with multiple line items (base plan + add-ons) need to consume rawResponse.lineItems directly for full fidelity.

Product (one-shot) response

{
  "valid": true,
  "purchase": {
    "kind": "androidpublisher#productPurchase",
    "packageName": "com.example.app",
    "productId": "gems_100",
    "purchaseToken": "...",
    "purchaseTimeMillis": "1744464130000",
    "purchaseState": 0,
    "consumptionState": 1,
    "acknowledgementState": 1,
    "orderId": "GPA.5678",
    "rawResponse": {/* full ProductPurchase from Google */}
  }
}

Negative outcomes (still 200 OK)

error	Cause
PURCHASE_NOT_FOUND	Google returned 404 (never existed) or 410 (consumed + gone). The message field distinguishes them.
PACKAGE_NAME_MISMATCH	Request's packageName doesn't match the tenant's configured package

Transport errors

Status	error	Cause
400	INVALID_REQUEST	Missing required field, type not subscription/product, body >16KB
400	CREDENTIALS_MISSING	Tenant hasn't configured Google credentials
401	UNAUTHENTICATED	Missing, malformed, or revoked API key
429	RATE_LIMITED	Google Play quota exceeded. details.retryAfterSeconds if Google sent Retry-After.
502	GOOGLE_API_ERROR	Upstream Google returned an unexpected status (500/503/etc.)

Common errors

GOOGLE_API_ERROR with details.status: 401

The service account isn't granted on the Play Console app. Revisit Play Console → Users and permissions and ensure the service-account email has app permissions for your app.

GOOGLE_API_ERROR with details.status: 403

The service account has Play Console access but is missing the androidpublisher IAM role in Google Cloud, or the API itself isn't enabled for your project. In Google Cloud Console:

1. APIs & Services → Library → search "Google Play Android Developer API" → Enable
2. IAM & Admin → IAM → confirm the service account has at least Editor or roles/androidpublisher.user

PURCHASE_NOT_FOUND for a purchase you know exists

Propagation delay. Google can take up to ~30s post-purchase to make the token queryable via the Developer API. Wait 30s and retry. If it persists, double-check the package name and that the purchase was made in a track the service account has visibility on.

RATE_LIMITED consistently

The free quota is ~200,000 queries/day per package. You're almost certainly not hitting it from verification calls — check Google Cloud Console quotas if you see this consistently. Most often this is misconfiguration causing retries to spike.

Service account validation fails

google:set-credentials requires type=service_account plus client_email, private_key, and token_uri all present. If you see "not a Google service-account JSON", you may have downloaded an OAuth client JSON by mistake — those are superficially similar but missing the required fields. Re-download the service account JSON (not OAuth client JSON).

What's next

• Webhooks — set up Real-Time Developer Notifications via Pub/Sub
• Tenants — multi-app / multi-environment management
• Maintenance — service-account key rotation