S256 Wallet

Mobile wallet for SHA256coin (S256)
Built with Flutter for Android & iOS

Website • Explorer

Features

• Create new wallet or recover from private key (WIF)
• Send and receive S256
• QR code scanning (supports BIP21 URI format)
• Transaction history with confirmation tracking
• Biometric authentication (fingerprint/face)
• Secure private key storage

Quick Start

# Install dependencies
flutter pub get

# Run in development (uses public RPC)
flutter run

# Build APK
flutter build apk

# Build with custom RPC
flutter build apk --dart-define-from-file=dart_defines.json

Configuration

The wallet connects to the public RPC proxy at https://sha256coin.eu/rpc by default (no authentication required).

For custom RPC node, create dart_defines.json:

{
  "RPC_URL": "http://your-rpc:port",
  "RPC_USER": "your_user",
  "RPC_PASSWORD": "your_password"
}

Build for Production

# Android APK
flutter build apk --release --dart-define-from-file=dart_defines.json

# Android App Bundle (Play Store)
flutter build appbundle --release --obfuscate \
  --split-debug-info=build/app/outputs/symbols \
  --dart-define-from-file=dart_defines.json

# iOS
flutter build ios --release --dart-define-from-file=dart_defines.json

Output locations:

• APK: build/app/outputs/flutter-apk/app-release.apk
• AAB: build/app/outputs/bundle/release/app-release.aab

Security

• Private keys stored in encrypted secure storage (Keychain/KeyStore)
• Optional biometric authentication
• RPC credentials injected at build time, never hardcoded
• No personal data collected

Never commit dart_defines.json or .env to version control.

Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/my-feature)
3. Commit your changes (git commit -m 'Add my feature')
4. Push to the branch (git push origin feature/my-feature)
5. Open a Pull Request

For bugs or feature requests, please open an issue.

License

MIT