The realistic compromise for many of the people this app is built for is
not interception but a phone taken, and often unlocked under coercion.
Content encryption is in good shape; these are the gaps around it.
Hide notification previews, by default. Notification content is rendered
by the system on the lock screen, so it was readable without unlocking:
DM alerts carried the sender's nickname and the full message body, and
geohash alerts put the geohash in the title. Alerts now state that a DM,
mention, or location-channel activity arrived and withhold the rest until
the app is opened. userInfo still carries the routing peer ID and deep
link, neither of which the system displays, so taps land where they did.
A settings toggle restores full previews for anyone who wants them.
Default-on is the deliberate part: a phone face-up on a table should not
narrate conversations, and someone who wants previews can say so.
Cover the window on willResignActive, so the snapshot iOS stores for the
app switcher shows a placeholder rather than an open conversation. Opaque
rather than blurred, because blurred large text stays partly legible and
the snapshot goes to disk. Added synchronously from a UIKit notification
with queue: nil, since the capture follows shortly after and an
OperationQueue hop or a SwiftUI state change can lose that race. Panic
wipe already deleted snapshots already on disk; this stops new ones from
being worth deleting.
Bound media by age as well as size. The 100 MB quota only ever considered
incoming files, so outgoing media had no lifetime at all and a received
photo could outlive its conversation indefinitely. A launch-time sweep now
deletes managed media older than seven days, incoming and outgoing, with
the same exemptions quota eviction honors: in-flight live captures and
files reserved by a delivery or deletion in progress.
Make /clear tell the truth on the mesh timeline. It recorded an echo
watermark and left the gossip archive on disk for up to 6 hours, so
someone who cleared before a police stop had deleted nothing. Clearing now
erases the archive too. The watermark still matters: it suppresses
pre-clear messages this device hears again from peers. The cost is that
the device stops serving recent public backlog until it hears fresh
traffic, which is a fair reading of what clearing a timeline means.
Documented in PRIVACY_POLICY.md and the privacy assessment, including a
new section on what is deliberately NOT addressed: there is still no
duress mechanism of any kind (no decoy passphrase, no wipe-on-failed-auth,
no app lock), macOS gets no file-protection classes, and media is not
sealed at the app layer. The duress question is a product decision as much
as an engineering one, since in some jurisdictions destroying data on
demand is itself an offence and hiding may protect someone better than
destroying, so it is called out rather than guessed at.
Three findings from the audit that prompted this work turned out to be
already fixed on main and are not included: keychain accessibility is
AfterFirstUnlockThisDeviceOnly with a retrying migration, the panic media
wipe uses a two-location durable marker transaction, and panic already
discards staged share-extension content.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Periphery 3.7.4 audit of both schemes (macOS + iOS, intersected so
platform-specific code is never touched), with test targets indexed and
the share extension built. 277 dead declarations removed or demoted:
dead forwarding wrappers (ChatViewModel+Nostr/+PrivateChat), removed-
feature remnants (autocomplete command suggestions, back-swipe tuning,
MediaSendError, GeohashParticipantTracker), unused Tor dormancy
bindings, assign-only properties, unused parameters (renamed to _), and
redundant public accessibility. 13 orphaned localization keys deleted
across all 29 locales (old pre-#1392 location-notes UI, app_info
warnings).
Two real tests were flagged as unused because they never ran: Swift
Testing methods missing @Test (NostrProtocolTests.
testAckRoundTripNIP44V2_Delivered, NotificationStreamAssemblerTests.
testAssemblesCompressedLargeFrame). Re-armed both; they pass.
Deliberately kept, now recorded in .periphery.baseline.json: iOS-only
code invisible to the CI macOS scan, C FFI signatures, keep-alive
NWPathMonitor reference, InboundEventKey.eventID (dedup semantics),
wifiBulk capability bit (reserved for Wi-Fi bulk work, used by
BitFoundation package tests), and the String secureClear cluster
(exercised by package tests).
New: .periphery.yml config and an advisory Dead Code CI job (mirrors
the SwiftLint precedent from #1361) that fails on findings not in the
committed baseline.
Verified: full macOS app suite, BitFoundation (119) and BitLogger (13)
package tests green; periphery scan --strict exits clean.
Co-authored-by: jack <jackjackbits@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
* NIP-13 proof-of-work for geohash channels: mine on send, relax rate limits for PoW senders
Outgoing kind-20000 geohash messages mine a NIP-13 nonce tag (8 leading
zero bits, ~256 hashes, typically <1 ms) off the main actor before
signing. Mining is hard-capped at 2 s and cancellable (newer send or
channel switch): on cap/cancel the committed target steps down so the
message still ships promptly with an honest commitment - sending is
never blocked and nothing is dropped. The hot loop serializes the
canonical event once and rewrites only the fixed-width nonce bytes.
Inbound kind-20000 events are scored per NIP-13 commitment semantics
(committed target counts; the ID must actually meet it, extra work
earns nothing) and never hard-rejected: validated PoW >= 8 bits skips
the per-sender rate-limit bucket while the per-content flood bucket
still applies, so old non-mining clients keep working under today's
strict limits while bulk spam gets expensive.
Presence heartbeats (kind 20001), kind-1 notes, and DMs are unchanged;
no UI beyond a pow= field in an existing sampled debug log.
Reimplemented from scratch rather than cherry-picking the stale
feature/pow-geohash-mining-ui branch (unbounded loop, hard receive
filtering, mining UI, XCTest, force unwraps).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* Geohash: serialize PoW sends so order matches send order
Two location-channel sends back-to-back only cancelled the previous
mining task and started a new one. Cancellation merely *expedites* NIP-13
mining (the target is polled and steps down; it never aborts the send),
so the cancelled task still appended + relayed once mining returned. Both
tasks ran concurrently and the second (shorter to mine) could finish
first, reordering messages in the timeline and on relays.
Chain the mining tasks: each geohash send captures the previous send's
task, cancels it (to expedite, so delays never stack), and awaits its
completion before it echoes and relays. Order is now always send order.
The >2s mining cap is preserved: cancellation expedites the awaited task,
so a send is never blocked beyond NostrPoW.miningTimeCap.
Test: two rapid sends where the first mines longer (larger content) still
land in send order for both the local echo and the relayed events.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---------
Co-authored-by: jack <jackjackbits@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Mesh and geohash timelines are now store conversations. All public
mutation sites flow through store intents; PublicMessagePipeline keeps
its 80ms UI batching but commits batches via store appends with each
buffered entry carrying its destination conversation (a mid-batch
channel switch now flushes instead of dropping the buffer).
ChatViewModel.messages becomes a cached get-only view of the active
conversation, invalidated through the change subject. The mesh
late-insert threshold is consciously removed: it only ever ordered the
non-rendered messages copy, so strict timestamp insertion makes the
working set agree with rendered order. PublicTimelineStore and the
per-message full-array legacy sync are deleted; the coalescing bridge
mirrors public conversations for the remaining legacy readers.
pipeline.publicIngest: 6.6k -> 9.5k msg/s (+45%); private steady;
store.append 237k/s.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
All private-message mutations now flow through store intents:
coordinators, PrivateChatManager (its @Published dicts deleted - now
read-only views over the store), outbound sends, delivery status, and
chat migration. The O(1) store dedup replaces the full-scan duplicate
check; insertion order is maintained by the store so sanitizeChat's
re-sort is a documented no-op. Both bootstrapper Combine bridges and
the Task.yield store synchronization are deleted.
ChatViewModel.privateChats/unreadPrivateMessages become get-only derived
views (measured: naive rebuild equals a change-invalidated cache within
noise, so the simpler form stays). Feature models still read the legacy
store, fed by a coalescing LegacyConversationStoreBridge (one mirror
per burst, marked for step-5 deletion).
pipeline.privateIngest: 9.6k -> 14.7k msg/s (+53%).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
NotificationService.shared and FavoritesPersistenceService.shared
accesses across nine coordinators/components consolidate into
ChatViewModel witnesses behind intent-named context members
(notifyPrivateMessage, notifyMention, favoriteRelationship(forNoiseKey:),
allFavoriteRelationships, postLocalNotification, ...). Singleton reach
from coordinators is now zero; nine new tests cover previously
untestable notification/favorites flows.
Also root-causes the long-flaky gift-wrap dedup test: parallel tests
share LocationChannelManager.shared, so channel-switch tests trigger
clearProcessedNostrEvents() on every live ChatViewModel, wiping the
dedup record mid-test. The invariant (forged-signature copies never
poison dedup) now lives as a deterministic NostrInboundPipeline
mock-context test; two Schnorr concurrency probes added along the way
stay as regression guards for the P256K shared-context assumptions.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
nostrKeyMapping, sentGeoDeliveryAcks/sentReadReceipts dedupe,
isBatchingPublic, geo subscription lifecycle, and private-chat selection
hand-off now mutate through single intent operations on ChatViewModel,
with backing storage locked down via private(set) so the single-writer
property is compiler-enforced. Context protocols downgrade to read-only
access where reads remain. 8 new contract tests.
Known remaining writers outside the protocols: sentReadReceipts is
passed inout to PrivateChatManager.syncReadReceiptsForSentMessages and
un-marked by ChatTransportEventCoordinator on disconnect.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
BLEService's per-packet-type orchestration moves into owned, tested
components (BLEAnnounceHandler, BLEPublicMessageHandler,
BLENoisePacketHandler, BLEFileTransferHandler, BLEFragmentHandler),
each taking an environment struct of closures so every queue hop stays
in BLEService and the handlers are synchronously testable. Behavior is
preserved verbatim, including Noise session recovery on decrypt failure
and single-block UI event ordering. handleLeave/handleRequestSync stay
in place as already-thin delegations. BLEService drops to 3393 lines.
Four coordinators (delivery, private conversation, Nostr, public
conversation) drop their unowned/weak ChatViewModel back-references for
narrow @MainActor context protocols, with ChatViewModel conformances as
single shared witnesses for overlapping members. Their true coupling is
now an explicit, reviewable surface, and each gains a mock-context test
suite covering flows previously testable only through the full view
model. Delivery/read acks now also clear the router's retained-send
outbox via the delivery context.
New LargeTopologyTests exercise production-shaped meshes with the
in-memory harness: an 8-peer relay chain with per-hop TTL decay, a
14-peer cyclic mesh with exactly-once delivery, partition/heal, and
topology churn.
App-layer runtime/model files updated alongside.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
