feat(supabase_flutter): Android Restore Credentials on top of passkeys - #1824
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Priority: ⬆️ High Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature · Severity of issue fixed: High Sequence Diagram(s)sequenceDiagram
participant App
participant AuthClient
participant PasskeyAuthenticator
participant GoTrue
App->>AuthClient: createRestoreKey(authenticator)
AuthClient->>GoTrue: Request registration options
AuthClient->>PasskeyAuthenticator: Create restore credential
AuthClient->>GoTrue: Verify registration and update passkey
App->>AuthClient: signInWithRestoreKey(authenticator)
AuthClient->>GoTrue: Request authentication options
AuthClient->>PasskeyAuthenticator: Get restore credential
AuthClient->>GoTrue: Verify authentication
Suggested reviewers: Merge Risk: ⚪ Minimal · up to Restore-key authentication retains the normal session and sign-in behavior, and sign-out guidance covers cleanup of the device credential. No unresolved merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Tr00d
approved these changes
Sep 10, 2026
Adds RestoreCredentialInterface and the createRestoreKey and signInWithRestoreKey helpers so an app can meet Google Play's Restore Credentials requirement with a Supabase passkey as the restore key. Closes #1791
…alInterface passkeys_platform_interface 2.10.0 ships RestoreCredentialInterface and the passkeys plugin's PasskeyAuthenticator implements it, so the restore key helpers take that type instead of a bespoke string-based interface.
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Inline comments:
In `@packages/supabase_flutter/lib/src/supabase_restore_credential.dart`:
- Around line 43-45: Update the sign-out guidance near AuthPasskeyApi.delete to
separately require Android platform cleanup via
CredentialManager.clearCredentialState using TYPE_CLEAR_RESTORE_CREDENTIAL, in
addition to deleting the server passkey; do not reference
RestoreCredentialInterface.clearRestoreCredential() unless that wrapper is
explicitly exposed.
- Around line 70-77: Update createRestoreCredential around verifyRegistration
and passkey.update: clear the stored restore credential and rethrow when
verification fails, but preserve the platform credential and registered passkey
when the friendly-name update fails by returning registered instead of
propagating that error. Add tests covering both verification-failure cleanup and
non-fatal rename failure.
In `@packages/supabase_flutter/README.md`:
- Line 324: Update the restore-credentials documentation around createRestoreKey
to explicitly require a signed-in, non-anonymous user, replacing the ambiguous
“after sign in” wording while preserving the existing first-launch
signInWithRestoreKey guidance.
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Remove the device restore key again when the server rejects the created credential, keep the registered passkey when only the rename fails, and document the sign-out cleanup on both sides and the non-anonymous precondition.
Replace the hand-rolled BaseClient mock and JWT with MockSupabaseHttpClient stubs, signInTestUser and the session fixtures.
The 2.23.0 release never published its platform packages, so 2.23.1 is the first installable version with RestoreCredentialInterface support.
The release that ships RestoreCredentialInterface support in PasskeyAuthenticator.
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What kind of change does this PR introduce?
Feature. Closes #1791.
What is the current behavior?
Google Play requires apps with sign-in to restore the signed in state on a new Android device through Credential Manager's Restore Credentials API from April 2027. The issue asks for a server-issued single-use restore token because storing the rotating refresh token is unsafe: a stale copy replayed from a backup trips refresh token reuse detection and revokes the whole session family.
The requested token already exists in a different shape. A restore key is a WebAuthn credential; Android documents that the server side is identical to passkeys. Supabase Auth ships passkey endpoints (
/passkeys/registration/*,/passkeys/authentication/*) withuserVerification: preferred, so a silently created and silently asserted restore key is accepted, and signing in with it opens a fresh session that is independent of the old device's refresh token chain.supabase_authalready exposes those endpoints throughauth.passkey, but nothing connects them to Android'sCreateRestoreCredentialRequest/GetRestoreCredentialOptioncontract, and the README says nothing about the requirement.What is the new behavior?
supabase_fluttergains a thin layer next to the existing passkey helpers:RestoreCredentialInterfacefrompasskeys_platform_interface2.10.0, which thepasskeysplugin'sPasskeyAuthenticatorimplements since 2.23.0. The same authenticator object therefore serves the passkey helpers and the restore key helpers, andsupabase_flutterkeeps taking no dependency on a specific plugin.AuthClient.createRestoreKey(restoreCredential, {friendlyName, isCloudBackupEnabled})runs the registration ceremony for the signed in user and then names the passkey (Android restore keyby default) so restore keys can be told apart from user-created passkeys and hidden from a management screen, which Android's guidance asks for.AuthClient.signInWithRestoreKey(restoreCredential, {captchaToken})runs the authentication ceremony on the new device, persists the session and firessignedIn.sdk-compliance.yamlunder the existingauth.passkey.register_passkeyandauth.passkey.sign_in_with_passkeycapabilities. No new canonical IDs.Both helpers are
@experimentalbecause they build on the BETA passkey feature.Additional context
Server-side limitations that a GoTrue change would remove, none of them blocking:
listfilter them out.max_passkeys_per_user(default 10). There is no TTL.Not included: a native Android plugin inside
supabase_flutter, for the same reason the passkey helpers do not bundle one. The Android implementation lives in thepasskeysplugin (corbado/flutter-passkeys#305). Thepasskeysexample stays web-only, so it does not exercise the new helpers.Testing: unit tests drive both helpers against a fake
RestoreCredentialInterfaceand a mocked passkey server, checking the request sequence, the typed request handed to the platform including the cloud backup flag, the credential posted back, the rename, error propagation and the session/event on sign in. The ceremony against a real device was not run.Summary by CodeRabbit
New Features
Documentation
Tests