Fintech Super App refresh — React Native micro-frontends showcase#170
Draft
Fintech Super App refresh — React Native micro-frontends showcase#170
Conversation
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add react-native.config.js to trading and wallet so react-native start uses Re.Pack/Rspack instead of falling back to Metro (root cause of servers never starting) - Add resolve.modules to trading/wallet rspack configs so rspack finds native peer deps (reanimated, skia, victory-native, etc.) in host's node_modules at build time - Add @swc/helpers and react as devDependencies in sdk so SWC-injected helper imports resolve when rspack processes sdk TypeScript source - Declare native libs and super-app-showcase-sdk as MF shared singletons so host provides one JS instance per native module bridge and one PriceContext/KrakenWebSocketService across all mini apps - Add GestureHandlerRootView to host App.tsx root (trading exposes MainNavigator directly, not App, so the standalone wrapper never ran) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Required for Reanimated 4 worklet transpilation in host, trading, and wallet. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add babel-plugin-react-compiler to host, trading, and wallet for automatic memoization with React 19 - Add ConnectionStatus type and onStatusChange() to KrakenWebSocketService with connecting / connected / reconnecting / disconnected states - Add useConnectionStatus() hook exported from sdk - Show "Connecting to market…" / "Reconnecting…" banner in AssetListScreen and WalletScreen until first BTC price tick arrives (not just until WS connects — ensures banner is visible on every cold open of the tab) - Rewrite README for Fintech Super App: ASCII architecture diagram, stack table, package roles, setup instructions, port reference Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Trading tab: chart.line.uptrend.xyaxis Wallet tab: creditcard Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add react-native-bottom-tabs and @bottom-tabs/react-navigation as MF shared singletons so trading mini app reads the same BottomTabBarHeightContext provided by host's tab navigator. Use useBottomTabBarHeight() in AssetDetailsScreen to compute the exact native tab bar height (including home indicator) instead of guessing with safe area insets. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Plain React refs are not readable inside Reanimated worklets (UI thread), causing the flash to always use the initial value (green). Replacing with useSharedValue makes the direction correctly accessible on the UI thread. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Hoist @types/* packages to root node_modules via public-hoist-pattern in .npmrc so TypeScript can find them across all workspace packages - Add getSharedDependencies as a TypeScript implementation in sdk/src so it is accessible via the react-native exports condition (customConditions in @react-native/typescript-config) - Add missing peer deps as devDependencies in trading (reanimated, gesture-handler, bottom-sheet, victory-native) and wallet (reanimated) so pnpm symlinks them for IDE resolution - Add resolveJsonModule to sdk tsconfig and index.d.ts for the CJS entry point Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
public-hoist-pattern[]=@types/* in .npmrc was hoisting @types/react to root node_modules, which pnpm picked up as an optional peer when resolving react-native. Packages with and without typescript in scope then produced two distinct peer-resolution hashes, creating separate physical instances of react-native, react-native-reanimated, and react-native-worklets. Rspack resolved each from a different path, causing both initialisation routines to run in the same binary and triggering "RCTText registered twice". Fixes: - Remove public-hoist-pattern for @types/* from .npmrc - Add @types/react and typescript devDeps to sdk so its react-native peer hash matches host/trading/wallet (single instance across all packages) - Replace native devDeps in trading/wallet with tsconfig paths pointing to ../host/node_modules so the IDE can resolve types without pnpm creating duplicate instances - Regenerate pnpm-lock.yaml; now a single instance of react-native, react-native-reanimated, and react-native-worklets Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add TypeScript-source exports consumed by mini apps via the react-native package-exports condition (customConditions: ["react-native"]): - sharedDeps.ts: TS implementation of getSharedDependencies, fixing TS2305 in rspack.config.ts files that import it from the SDK - theme.ts: shared colors constant (was duplicated in trading and wallet) - utils/formatPrice.ts: shared formatPrice/formatValue helpers - components/ConnectionBanner.tsx: single source-of-truth for the live WS connection status banner (was duplicated in trading and wallet) - constants.ts: add ASSET_MAP for O(1) symbol lookup - index.ts: re-export all new symbols plus ConnectionStatus type Delete index.d.ts which was shadowing the react-native source entry and breaking host typecheck under moduleResolution: node. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
trading: - Delete ConnectionBanner (now from SDK) - AssetRow: extract flash-animation logic into useFlashAnimation hook, replace inline price formatter with formatPrice from SDK - AssetDetailsScreen: merge split reanimated imports, use formatPrice from SDK - AssetListScreen: import ConnectionBanner from SDK wallet: - Delete ConnectionBanner (now from SDK) - HoldingRow: remove ASSETS.find lookup (caller now passes asset prop), extract flash-animation into useFlashAnimation hook, use formatPrice/ formatValue from SDK - WalletScreen: fix TotalBalance calculation (was returning hardcoded 0 for assets not in a static map), use ASSET_MAP for O(1) lookup, pass asset prop to HoldingRow Flash animation is kept as a local hook in each mini app rather than exported from SDK to avoid pulling react-native-reanimated into the SDK peer graph. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
AuthProvider:
- Replace loose {type, token} action shape with a discriminated union so
each action carries only the fields it needs and the reducer is exhaustive
- signIn/signUp: dispatch only after SecureStore.setItem resolves, not after
the catch block, so a storage failure never puts the app in a signed-in state
- signOut: dispatch unconditionally (storage failure is best-effort; the user
is still considered signed out in JS)
AuthService:
- Mark TOKEN_KEY as private readonly
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…tubs
React Navigation v7 removed the independent prop from NavigationContainer.
The mini-app standalone App.tsx files (used only for local dev without a host)
were passing independent={true}, causing a TS2322 type error. The prop is not
needed here since there is no outer navigation context when running standalone.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add useHistoricalPrices(krakenPair) hook to SDK that fetches the last 60 one-minute candles from Kraken's public OHLC REST endpoint on mount and returns the close prices as number[]. AssetDetailsScreen seeds its 60-tick buffer from this data so the chart renders immediately on open. A seededRef ensures the seed runs exactly once — it fires on the first non-empty response regardless of any live WebSocket ticks that may have already landed in the buffer. Subsequent ticks continue appending as before. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Use victory-native's yAxis prop to render 4 price tick labels on the right side of the chart. Labels are formatted as compact values ($95.2k for prices ≥ 1000, $150 for ≥ 1, $0.452 for sub-dollar assets). Font is resolved via Skia's matchFont using the system font, with a null fallback so the chart renders gracefully if font loading fails. Add @shopify/react-native-skia to trading's tsconfig paths so TypeScript resolves the import from host/node_modules without a devDep. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…ction - Delete duplicate theme.ts from trading and wallet; all files now import colors directly from super-app-showcase-sdk - Add getAssetIconUri(symbol) util to SDK; remove inline ICON_BASE_URL constant that was duplicated in AssetRow and HoldingRow - Fix ConnectionBanner: was hiding when btcPrice > 0 (fragile BTC proxy); now hides when status === 'connected' using useConnectionStatus directly - Restyle AccountScreen to match the app's dark Fintech theme; remove react-native-paper dependency and MD3Colors from this screen Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add Account tab to TabsNavigator with person.crop.circle SF Symbol - Wrap AccountScreenRemote in a NativeStackNavigator so the "Account" title renders in a native header matching the Wallet/Trading pattern - Restyle AccountScreen: ScrollView content area with 16px padding, Sign Out button pinned to the bottom above the tab bar using useBottomTabBarHeight, styled to match the Trade button (primary color) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Restore the original problem → solution → app → architecture sections updated for the Fintech Super App refresh. Covers the full stack, package structure, key design decisions (shared singletons, peer deps in host, useTransition for price updates), and setup/running instructions. Two TODO markers left for owner to fill in: app screenshot/GIF and updated architecture diagram image. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add 250–350ms random delay to each mini app lazy import so the Suspense fallback is visible during demos - Restyle Placeholder and SplashScreen to use the dark theme background with a primary-blue ActivityIndicator, replacing white SafeAreaView with MD3Colors that were inconsistent with the rest of the app Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…d bottom-tabs mocks Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…ries Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…ice ticks Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…e-renders Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
thiagobrez
approved these changes
May 7, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
A full rebuild of the Super App Showcase into a production-grade Fintech demo app demonstrating React Native micro-frontend architecture with Re.Pack and Module Federation V2.
Key patterns demonstrated
PriceCell,ValueCell) so only the price node re-renders on ticksuseTransition/startTransitionmarking price updates as non-priorityWhat's in this PR
docs/MODULE_FEDERATION_DEMO_GUIDE.mdStill to do (post-merge)
_TBD_bundle size and CI time tables inMODULE_FEDERATION_DEMO_GUIDE.mdwith real measured numbers🤖 Generated with Claude Code