ChainTorque Native

Premium 3D CAD NFT Marketplace - Android App

A native Android application for browsing, purchasing, and managing NFT-based CAD assets on the Ethereum Sepolia testnet.

Features

• NFT Marketplace - Browse and purchase premium 3D CAD assets
• MetaMask SDK Integration - Connect directly with MetaMask Android App
• User Profiles - View owned NFTs, purchase history, and sales
• Sepolia Testnet - Built for Ethereum Sepolia testnet transactions

Tech Stack

Layer	Technology
UI	Jetpack Compose, Material 3
Architecture	MVVM, Hilt DI
Networking	Retrofit, OkHttp
Wallet	MetaMask Android SDK (v0.5.1)
State	StateFlow, LiveData
Blockchain	Native eth_sendTransaction

Project Structure

app/src/main/java/com/example/chaintorquenative/
├── di/                    # Hilt dependency injection
├── mobile/
│   ├── data/
│   │   ├── api/           # API service & models
│   │   └── repository/    # Data repositories
│   └── ui/
│       └── viewmodel/     # ViewModels
├── ui/
│   ├── components/        # Reusable UI components
│   ├── screens/           # Compose screens
│   └── theme/             # App theming
├── wallet/                # MetaMask SDK integration
├── ChainTorqueApplication.kt
└── MainActivity.kt

Setup

Prerequisites

• Android Studio Ladybug or later
• JDK 17+
• Android SDK 33+

Configuration

1. No API keys needed for MetaMask SDK default integration
2. Uses standard io.metamask.androidsdk dependency

Build

./gradlew assembleDebug

API Endpoints

The app connects to a backend server for:

• GET /api/marketplace - List NFT assets
• GET /api/marketplace/:id - Asset details
• POST /api/user/register - Register wallet
• GET /api/user/:address/nfts - User's NFTs

Testing

1. Install MetaMask on your Android device/emulator
2. Create/Import a wallet and switch to Sepolia Testnet
3. Get test ETH from a Sepolia faucet
4. Open ChainTorque, go to Wallet tab, and tap "Connect with MetaMask"
5. Approve the connection in the MetaMask app
6. To buy: Select an item, tap "Buy Now", and sign the transaction in MetaMask

License

MIT License

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