aptrade_mobile

Mobile and web front end for AptoTrade, a derivatives exchange on the Aptos blockchain. One Expo codebase runs on Android, iOS and the browser.

Why

Most DEX front ends are web only and feel nothing like the exchange apps people already use. AptoTrade wants a CEX-style experience (spot, futures, wallet) on a decentralized backend. This repo is the client half of that: a tabbed trading UI built with Expo Router and Tailwind classes (NativeWind), so one TypeScript codebase ships to phone and browser. The Move contracts live in the sibling repo linked above.

Current state: the screens are a working UI prototype. All prices, order book rows and balances are hardcoded in the screen files. Nothing talks to Aptos yet (see Limitations).

Demo

Bundled app assets (wired in app.json):

File	Used as
assets/icon.png	App icon
assets/adaptive-icon.png	Android adaptive icon foreground
assets/splash.png	Splash screen (resizeMode: contain, white background)
assets/favicon.png	Web favicon

Quickstart

Needs Node.js with npm (the project was scaffolded with npm 10.8.2, see cesconfig.json). For a phone, install Expo Go, or have an Android emulator / iOS simulator running.

git clone https://github.com/DeepakSilaych/aptrade_mobile.git
cd aptrade_mobile
npm install

Run on one target (each is a script in package.json):

npm run web       # expo start --web
npm run android   # expo start --android
npm run ios       # expo start --ios

Or start the dev server once and pick a target from the Expo menu:

npm start         # expo start

Verify: the app opens on a dark tab bar with five tabs (Home, Markets, Trades, Futures, Wallet). Tap Trades, change the amount, and the USDT total updates.

How it works

package.json "main": expo-router/entry
        |
        v
app/_layout.tsx                 root <Stack>: "(tabs)" + "modal"
        |
        v
app/(tabs)/_layout.tsx          <Tabs>, Ionicons, dark theme (#1E293B, gold active)
   |        |         |           |           |
 index    market    trade      futures     wallet
 Home     Markets   Trades     Futures     Wallet
 (stub)   (stub)    buy/sell   long/short  balances +
                    form +     form +      favorites +
                    order book chart stub  refresh
                       |          |            |
                       v          v            v
              hardcoded arrays inside each screen file
              (no network calls, no chain calls)

Styling: global.css -> metro.config.js (withNativeWind) -> babel nativewind preset
         -> Tailwind classes on React Native components via className

1. Expo Router maps files under app/ to routes. app/_layout.tsx is a native stack with the tab group and a modal route.
2. app/(tabs)/_layout.tsx declares the five tabs and their icons.
3. app/(tabs)/trade.tsx is the spot screen: a Buy/Sell toggle animated with Reanimated, price and amount inputs, a computed USDT total, a static bid/ask list, and a react-native-modalize bottom sheet to switch between BTC, ETH, SOL and BNB. Pressing Buy/Sell only writes to console.log.
4. app/(tabs)/futures.tsx mirrors that with a Long/Short toggle and a Show Chart button that reveals a grey placeholder box. Its order book is commented out.
5. app/(tabs)/wallet.tsx lists six tokens with logos from cryptologos.cc, an All/Favorites filter, and a refresh button that fills balances with random numbers.
6. app/+html.tsx is the web-only HTML shell (viewport scaling disabled, body scroll reset, dark-mode background).
7. components/ holds small shared pieces (Button, Container, HeaderButton, TabBarIcon, ScreenContent) from the create-expo-stack template.

Chain and wallet

There is no on-chain code in this repo yet. @web3auth/react-native-sdk is listed in package.json but is not imported anywhere, and no Aptos SDK is a dependency. Contract interfaces, order matching and settlement are defined in DeepakSilaych/AptoTrade (Move). This client will need an Aptos client and a wallet/auth layer wired into the Trade, Futures and Wallet screens to go live.

Features

Screen	What works today	Source
Trades	Buy/Sell toggle, price and amount inputs, live USDT total, token picker sheet, static order book	app/(tabs)/trade.tsx
Futures	Long/Short toggle, same inputs and total, chart placeholder toggle	app/(tabs)/futures.tsx
Wallet	Token list with logos, favorite star per token, All/Favorites filter, mock refresh	app/(tabs)/wallet.tsx
Home, Markets	Template placeholder text only	app/(tabs)/index.tsx, market.tsx
Not found	Fallback route with a link home	app/+not-found.tsx

Configuration

No environment variables. Behaviour is set in app.json and tsconfig.json:

Key	Value	Purpose
expo.scheme	aptrade	Deep link scheme (aptrade://)
expo.web.output	static	Web export is static HTML per route
expo.experiments.typedRoutes	true	Type-checked href values for Expo Router
expo.experiments.tsconfigPaths	true	Enables the ~/* import alias from tsconfig.json
expo.userInterfaceStyle	light	Native UI style; screens still paint their own dark backgrounds
expo.orientation	portrait	Locks orientation

Design decisions and trade-offs

• File-based routing over a hand-written navigator. Expo Router with typed routes means adding a tab is one file plus one Tabs.Screen entry.
• Tailwind classes (NativeWind v4) over StyleSheet. Screens style with className; the Babel preset sets jsxImportSource: "nativewind". A few template files still use StyleSheet, so both styles coexist.
• Mock data inline in screens. Fast for prototyping the UI, but every screen owns its own copy of the token list. Move this to a shared module when the chain client lands.
• Three icon libraries. Tabs use react-native-vector-icons/Ionicons, shared components use @expo/vector-icons, and the Wallet screen uses react-icons/fa, which renders SVG for the DOM and is not a React Native component. Expect the Wallet icons to work on web only until they are swapped.
• Two lockfiles are committed (package-lock.json, pnpm-lock.yaml). The scaffold config says npm; use npm to match the README.
• react-native-safe-area-context is pinned at 4.10.1 and excluded from expo install version checks in package.json.

Project layout

app/                Expo Router routes
  _layout.tsx       root stack
  (tabs)/           five tab screens + tab bar layout
  +html.tsx         web HTML shell
  +not-found.tsx    404 route
  modal.tsx         registered modal route (currently empty)
components/         shared UI pieces
assets/             icon, adaptive icon, splash, favicon
app.json            Expo app config
babel.config.js     Expo + NativeWind presets
metro.config.js     Metro with NativeWind and global.css
tailwind.config.js  Tailwind content paths + NativeWind preset
cesconfig.json      create-expo-stack scaffold record

Development

npm run lint      # eslint (universe/native) + prettier --check
npm run format    # eslint --fix + prettier --write
npm run prebuild  # expo prebuild: generates ios/ and android/ (gitignored)

There are no tests and no CI workflow yet.

Roadmap / limitations

• No Aptos or wallet integration; trade and futures actions only log to the console.
• Home and Markets tabs still show the create-expo-stack placeholder.
• app/modal.tsx is registered in the root stack but the file is empty.
• The Futures chart is a placeholder View; there is no charting dependency.
• Wallet icons come from react-icons, which does not render on native.

Contributing

Open an issue or PR on GitHub. Run npm run lint before pushing.

License

No license file yet.