# apps/mobile/lib

App-local helpers that depend on Expo / React Native APIs and therefore cannot live in `packages/shared`.

Expected contents:

- `secureStorage.ts` — thin adapter over `expo-secure-store`, exposes get/set/delete that `@chat-app/shared/auth` consumes.
- `sqlite.ts` — opens the encrypted local message DB via `expo-sqlite`, exposes a migration runner.
- `push.ts` — wires `expo-notifications` + registers FCM/APNs token with Supabase.
- `sodium.ts` — binds `react-native-libsodium` to the backend interface expected by `@chat-app/shared/crypto`.