vjrj
225880fc64
Wires the encrypted sync transport into a working replication between one identity's own devices, reusing the CRDT-ready model (HLC + tombstones + LWW) the data model was built for. - SocialSession gains a 5th interface, sync, over the shared connection, built with a per-install deviceId + the app's inventory namespace. - DeviceIdStore: a stable random per-install id in the keystore — distinct from the seed-derived CRDT node id, which is IDENTICAL across a user's devices (so it couldn't tell them apart / they'd clobber each other's replaceable record). - InventorySnapshotIO (implemented by ExportImportService): build/apply the inventory as the SAME interchange JSON as backups but UNSEALED — the sync transport does the encryption, so it must not double-seal. Apply = the existing idempotent LWW importInventory. - SyncService: on (re)connect publishes this device's snapshot + subscribes to the others'; a local edit (debounced, off tableUpdates) republishes; incoming snapshots merge idempotently; skips its own echo; a byte check skips re-publishing an unchanged snapshot so the ping-pong converges. Foreground only, like the inbox. - DI/Bootstrap/switchSocialAccount wire and lifecycle it per identity. Tests: DeviceIdStore, ExportImportService snapshot round-trip (unsealed + idempotent), SyncService.handleRemote (applies others', skips own). Follow-ups: deltas vs full-snapshot pushes; background sync; conflict UI.
34 lines
1.2 KiB
Dart
34 lines
1.2 KiB
Dart
import 'dart:math';
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import '../security/secret_store.dart';
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/// A stable per-INSTALL device id, kept in the keystore. Distinct from the
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/// seed-derived CRDT node id (`rootSeedHex.substring(0,16)`), which is IDENTICAL
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/// across a user's devices — so it can't tell them apart. Device-to-device sync
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/// needs each device to own a separate record, hence a random per-install id.
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class DeviceIdStore {
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DeviceIdStore(this._store, {Random? random}) : _random = random ?? Random.secure();
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final SecretStore _store;
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final Random _random;
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static const _key = 'tane.device.id';
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Future<String>? _cached;
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/// This install's device id, generated and persisted on first use.
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Future<String> deviceId() => _cached ??= _readOrCreate();
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Future<String> _readOrCreate() async {
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final existing = await _store.read(_key);
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if (existing != null && existing.isNotEmpty) return existing;
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final id = _randomHex(8); // 64 bits — plenty to avoid device collisions
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await _store.write(_key, id);
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return id;
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}
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String _randomHex(int bytes) => [
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for (var i = 0; i < bytes; i++)
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_random.nextInt(256).toRadixString(16).padLeft(2, '0'),
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].join();
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}
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