Technical Architecture

Frontend (dApp)

• Framework: Next.js + Tailwind + shadcn/ui.

• Wallet Integration: wagmi + WalletConnect v2.

• Tracking Engine:

  • GPS: Browser Geolocation API with high-accuracy mode.

  • Motion: DeviceMotion & DeviceOrientation APIs.

  • Smoothing: Kalman filter to reduce GPS jitter.

Backend

• Language: Node.js (NestJS)

• Database: PostgreSQL + TimescaleDB (for GPS time series).

• APIs: REST + WebSocket for live session updates.

• Anti-Cheat Service: Python-based analytics with anomaly detection.

Security

• Data Encryption: AES-256 for storage, TLS for transmission.

• Privacy Controls: Optional private session mode.

• Authentication: Wallet signature (EIP-4361, “Sign-In with Ethereum”).