Binance Book

Personal Expo app for a Binance spot order book. Expo SDK 58 beta, React Native 0.88 RC, React 19.3.

Day-to-day testing uses Expo Go from the SDK 58 CLI (store builds of Expo Go still track the previous SDK until 58 is stable).

yarn start

Scan the QR code with Expo Go on Android, or press a if an emulator is running.

Libraries

• Reactive Data Client for the Binance REST snapshot (/api/v3/depth).
• @reactive/silk-native for UI. Silk is not on npm yet; packed tarballs live in vendor/. Refresh them from a sibling ../silk checkout with yarn vendor:silk.

End-to-end tests

yarn test and yarn web are the routine checks. Maestro (.maestro/book.yml) runs on demand against an Android APK when a native module, navigation, gesture, or React Native layout needs a device: eas workflow:run .eas/workflows/e2e-test-android.yml.