Files
buzz/mobile/test/features/age_gate
Wes b6aa5539e3 feat(mobile): account onboarding, key recovery and hosted reconnect (#8375)
## Behavior

Adds optional mobile Builderlab sign-in, identity backup/recovery,
community discovery/creation, and account-aware reconnect. **Builderlab
features are disabled by default:** when `BUZZ_AUTH_DOMAINS` is unset or
empty, account login, creation, backup/recovery, reconnect prompts, and
background account restoration are hidden/disabled. QR/code pairing,
links, and invites retain Nostr-only entry. Saved account state is
retained for later opt-in.


`--dart-define=BUZZ_AUTH_DOMAINS=communities.buzz.xyz,communities.public.builderlabstaging.xyz`
opts those DNS domains and their subdomains into required account setup.
The same policy gates pairing, deep links, durable community admission,
and reconnect. A nonempty list enables Builderlab features;
`BUZZ_BUILDERLAB_URL` alone does not. Enabled flows still require their
backend services. Existing Nostr relay authentication remains mandatory.

`BUZZ_HOSTED_RELAY_AUTH=true` enables scoped relay assertions and
reconnect prompts only for configured authentication domains. Configure
assertion issuance and each community's issuer binding before enabling
assertions; enable relay enforcement last. Account credentials stay at
Builderlab. Wrong-account recovery preserves keys; failed writes are not
replayed; authentication is bounded by request deadlines.

Hosted flows preserve keys across cancellation/restart, reconcile
interrupted creation/invitation acceptance, and support manual nsec file
import/export. Account identities are scoped to backend and
authenticated subject; reusing an existing local key for an unbound
account requires an explicit selection. Recovery reconciles the
advertised and recovered inventories before automatic selection.
Successful self-hosted admission retires its pending key, and iOS
startup removes interrupted export files. Adds authenticated relay `GET
/operator/communities/joined` for the companion Builderlab membership
endpoint.

## Validation

- Follow-up review repair at `66a12ac92`: self-hosted entry presents
readable choices and import despite incomplete enumeration, while
generation still requires a complete empty inventory; explicit selection
uses exact-key lookup. Consuming a value-equal duplicate now advances
dispatch. Reconnect requires an existing account binding or a
subject-scoped backup receipt before signing an assertion, and pins the
subject inside the serialized account request. An empty different
account is refused without sending key proof. Focused checks: configured
domains 58 passed; default 49 passed, 9 hosted-only skips. Separate
isolated mutations fail the incomplete-inventory sheet, exact-key reuse,
duplicate dispatch and reconnect journeys (including an
empty-account-only bypass); restored controls pass. Evidence uses
synthetic storage/network boundaries, not physical Android or live
backend association. All mandatory commit/push hooks passed; fresh
GitHub CI is pending.

- Bounded review repair at `d3cc0003f`: incomplete secure-storage
enumeration now blocks automatic identity generation while explicit
known-key reads retain their fallback; declined/failed onboarding links
release the queue; HTTP 429/5xx keeps Retry regardless of response
encoding. Default app-gate coverage exercises a bind link followed by
ordinary community entry. Focused checks: configured domains 47 passed;
default 38 passed, 9 hosted-only skips. Removing the three production
fixes in an isolated source/Git/build copy fails the
identity-resolution, declined/failed queue, and Retry journey
assertions; clean and restored controls pass. Storage and HTTP failures
are synthetic; physical Android and live outage behavior were not
exercised. Published after all mandatory commit/push hooks passed
(mobile analysis/tests, branch-skew and file-size gates); fresh GitHub
CI remains pending.

- Existing whole-PR source review cleared the reconnect defects at
`fb15d5b82`.
- Domain-policy increment: focused environment, entry, app-gate, pairing
and onboarding journeys pass with empty and configured domains. Existing
pairing provider/page tests pass. Changed Dart files analyze cleanly.
- Isolated source/Git/build mutation: forcing paired credentials through
hosted login fails the default-build journey; clean and restored
controls pass. CI now runs configured-domain journeys in addition to the
default-build suite.
- Integrated main through `5b433d929` at `0067c069c`, including its
pinned Flutter upgrade. Preserved the PR welcome UI with the updated
transition API and added Material surfaces around onboarding
selection/consent rows. Focused post-merge runs pass in both
configurations; all mandatory local push gates passed (mobile
analysis/tests, Rust tests, desktop-native checks, branch-skew and
file-size checks).

- Merge-review repair at `a315bce11`: focused identity/storage/admission
and widget journeys pass, including account switching with an empty or
already-bound second account, explicit reuse, and self-hosted
removal/rejoin with another key. Default-domain journeys pass too
(hosted-only cases intentionally skip there).
- Isolated source/Git/build mutation checks: bypassing account scoping,
reuse consent, pending-key retirement, or recovery inventory
reconciliation fails the relevant journey/invariant assertions; clean
and restored controls pass.
- Native `RunnerTests/IdentityFilePluginTests`: both tests pass on the
iPhone 18 Pro iOS 27 simulator with an isolated app identifier. At
`24a0dcaac`, the picker journey seeds residue in Library/Caches,
matching path_provider_foundation, and verifies plugin startup removes
it while preserving an unrelated file. The earlier tmp-only fixture did
not exercise the actual export location. This is synthetic native
cleanup/picker evidence, not a real terminated-share or live account
round trip.

- Follow-up: Caches and tmp cleanup; fallback to individually known
identity slots when Android bulk enumeration fails; explicit replacement
of a refused self-hosted key preserves its original before swapping the
retry slot. Configured-domain journeys/invariants: 34 passed; default:
31 passed, 3 hosted-only skips. Isolated enumeration/retry mutations
fail with passing controls. Bulk-read fallback preserves but cannot
enumerate arbitrary other-account slots until bulk reads recover.

- Configured-domain CI exposed a stale pairing-status assertion after
account scoping. The repaired test checks the admission mismatch,
preserved account/transfer keys, and no admitted community. The
configured-domain CI selection passes locally (56 tests); removing the
production mismatch guard fails the updated test, with clean/restored
controls passing. This is synthetic coordinator evidence, not physical
QR acceptance.

- Final review repair (`40e1e6101`): native iOS export creation uses
atomic complete file protection; normal and restart cleanup remain.
Account/policy/claim HTTP uses one 30-second total deadline with request
abort and body cancellation. Removed the unrelated NIP-FA spec edit.
- Focused account/admission/export tests: 25 pass; configured-domain
account/admission/onboarding journeys: 33 pass. Isolated deadline and
native-dispatch mutations fail, with passing clean/restored controls.
Native export/picker tests: 2 pass on iOS 27 simulator. The real
file-protection attribute assertion is physical-device-only because
simulator provides no Data Protection attribute; locked-device
protection and interrupted real sharing have not been observed.

- Opt-in UI: configured-domain CI selection passes (57 tests); default
selection passes (7 tests, 10 hosted-only skips); URL-only plus
whitespace/empty domains passes (6 tests, 9 hosted-only skips). Changed
Dart files analyze cleanly. Independent mutations that unconditionally
initialize the coordinator in the app gate, welcome entry, or link form
fail the default journey; clean/restored controls pass.
- Native welcome screens exercised on iPhone 18 Pro / iOS 27 simulator
in default and configured builds: default exposes community link / QR /
pairing code only; configured build additionally exposes Builderlab
connection and community creation. No live hosted login was exercised in
this check.

- Delivery at `e48fe73a9`: all mandatory push hooks passed (full mobile
analysis/tests, Rust tests, desktop-native checks, branch and file-size
checks). GitHub checks had not yet populated at the immediate post-push
snapshot.

## Review disposition

| Feedback | Disposition |
| --- | --- |
| Explicit self-hosted entry under unreadable inventory, duplicate
invite dispatch, reconnect cross-account binding
([entry](https://github.com/block/buzz/pull/8375#discussion_r4318421622),
[queue](https://github.com/block/buzz/pull/8375#discussion_r4318421640),
[reconnect](https://github.com/block/buzz/pull/8375#discussion_r4318455512))
| Repaired at `66a12ac92`; evidence above. Reconnect refuses unproven
ownership rather than silently establishing a binding. |
| Incomplete Android identity inventory, stranded deep-link queue,
transient HTTP retry classification
([review](https://github.com/block/buzz/pull/8375#pullrequestreview-5576864143))
| All three repaired in `d3cc0003f`; focused journeys and isolated
mutation evidence above. |
| Account cross-link, incomplete recovery inventory, committed invite
checkpoint, pending local key retirement/replacement | Repaired in the
preceding commits; journey and mutation evidence above. |
| iOS interrupted key export
([review](https://github.com/block/buzz/pull/8375#pullrequestreview-5575253252))
| Native cleanup plus complete protection at creation implemented.
Physical-device lock and real interrupted sharing acceptance remains
pending. |
| Trickle responses bypass idle timeout; unrelated NIP-FA edit
([review](https://github.com/block/buzz/pull/8375#pullrequestreview-5575764556))
| Total request deadline/abort implemented; spec edit removed. |
| Production domains rejected | Ordinary entry now needs no Builderlab
configuration. Opt-in account-required domains must still use supported
community mappings. |
| Lost Android Keystore recovery | Backup exclusions prevent the
reviewed stale-restore scenario; genuine key loss still has no in-app
recovery/reset and remains deferred. |
| Native secp256k1 dependency question | Obsolete against the current
base: upstream C integration landed in #8398; no package diff remains
here. |
| Operator membership endpoint contract | Documentation now states the
operator chooses the pubkey; no end-user session binding is implied.
Additional handler-level coverage is optional follow-up. |
| Optional Android partial document cleanup/activity retention; local
work after backup cancellation | Follow-up hardening, not claimed
implemented. Cancellation prevents remote backup upload. |
| Semgrep crypto inventory notices | Informational inventory, not
demonstrated defects. |

## Remaining draft gates

Native QR/browser-return acceptance remains unverified for this
revision. Optional Builderlab onboarding still needs backend
backup-status and joined-community routes, recovery
policy/configuration, and real backup/recovery/reconnect acceptance. The
empty-domain build removes these services as prerequisites for ordinary
pairing; it does not make the optional hosted flows backend-ready. Human
acceptance and current CI are still required before merge.



Review dispositions retained: production auth-domain configuration must
use supported community mappings; enabling `builderlab.xyz` does not add
support for `buzz.block.builderlab.xyz`. Recovery after genuinely losing
an Android Keystore key remains a follow-up, not a newly implemented
capability.


Human acceptance steps: build once without `BUZZ_AUTH_DOMAINS`
(including with a previously saved account) and confirm no Builderlab
controls/restoration while ordinary link and QR/code entry work. Build
with supported domains and confirm connection/creation appear; exercise
browser return and live backup/recovery/reconnect. On physical iOS,
exercise export and interrupted sharing/locked-device protection. Record
results before marking review complete.

---------

Signed-off-by: Wes <wesbillman@users.noreply.github.com>
Co-authored-by: Brain <1a02c72794dcd0f07058a353bc3a81f4028b8c77c92c87fce6d5c8b85970a20b@buzz.block.builderlab.xyz>
Co-authored-by: Brain <1a02c72794dcd0f07058a353bc3a81f4028b8c77c92c87fce6d5c8b85970a20b@wes.communities.public.builderlabstaging.xyz>
2026-10-19 15:46:58 -06:00
..

Age-check contract

Normal app, relay, and push startup do not depend on an age result. The only operation that can restrict access is a valid under-18 response from the current launch request. Errors, malformed responses, timeout, disposal, and late callbacks leave access allowed. There is one attempt per provider lifecycle, with no blocking retry or restart flow.

Production enforcement remains disabled. Dogfood builds can opt in with the Flutter define BUZZ_AGE_GATING_ENABLED=true. This enables the same notifier used by the native-channel and app tests. No real-device build is a PR prerequisite; actual OS prompts, signing, and account behavior will be checked in pre-release testing.

Automated evidence

  • age_signal_provider_test.dart: real method-channel codec, allowed/under-18 boundaries, malformed payloads, exceptions, missing plugin, timeout, late completion, concurrent callers, invalidation, disposal, and the build opt-in.
  • age_gate_app_test.dart: full app and push bootstrap remain mounted while the native response is pending or fails, and unmount only for a current under-18 response. Notification restoration failure does not gate app access.
  • Notification restriction leaves saved snapshots, signing keys, preferences, and remote leases intact. Only the confirming app process holds restriction authority; a later launch does not need storage restoration to allow access.
  • Swift and Kotlin adapter tests: platform-specific bounds are normalized conservatively, including contradictory ranges and extreme integers. Android SDK task tests exercise shared access, minor response delivery, both failure stages, and retired callbacks through the production request coordinator.
  • iOS simulator RunnerTests: the production method handlers deliver minor/error callbacks, allow notification restoration without app-group storage, and preserve snapshots through restriction, cleanup failure, and restoration.
  • Swift notification tests: real cross-process lock contention suppresses presentation. Process exit releases restriction without cleanup. Missing, stale, and inaccessible lock files cannot establish a restriction.

Run the Flutter age-gate suite both with and without the pre-release testing define. A test must fail if pending/error becomes restricted or an expired request can restrict. The implementation was mutation-tested for pending and error blocking.

An already-running platform consent dialog cannot be proven dismissible by Dart unit tests. That behavior remains part of pre-release testing validation before general re-enablement. Old releases that permanently saved push opt-out preferences did not record their cause; this change does not guess which opt-outs to reverse.