TruthRelay

Cellular networks and internet infrastructure fail first during crises, cut off exactly when citizens need reliable, life-saving information most. In the resulting blackout, unverified rumors spread rapidly, and critical help requests—such as blood or missing person reports—fail to reach responders due to flaky or non-existent connectivity.

TruthRelay provides an offline-first mesh network that delivers cryptographically verified crisis bulletins and emergency help requests during cellular and internet blackouts. 1. Source-Signed Trust Model: Authorized moderators sign updates locally using Ed25519 cryptography over byte-identical Canonical JSON. This ensures news and debunks remain tamper-proof and verifiable even when transmitted through untrusted intermediate devices. 2. Multi-Transport P2P Mesh: Devices automatically discover each other via Bluetooth Low Energy (BLE) beacons and exchange stored outboxes over high-bandwidth Wi-Fi Direct links or local hotspots—operating 100% off-grid without requiring global internet connectivity. 3. Store-and-Forward Sync: Unsent posts remain queued in local Hive storage. The moment any phone comes into range of an edge relay (an Axum + SQLite edge server running on a local laptop) or a connected peer, it automatically flushes its outbox and forwards carried peer data. The relay deduplicates packets by SHA-256 and re-verifies all signatures before broadcasting them across the network.

Tech Stack & Tools Used in TruthRelay: 1. Backend (Relay Server) - Language: Rust - Framework: Axum - Database: SQLite - Cryptography: ed25519-dalek (Ed25519 signature verification) - CLI: clap 2. Web Admin Dashboard / PWA - Framework: Vue 3 - UI Library: Naive UI - Build Tool & Runtime: Vite, Bun - Cryptography: @noble/ed25519 - Testing: Vitest 3. Mobile Application (Android) - Framework: Flutter - State Management: Riverpod - Local Database / Outbox: Hive - Router: go_router - Cryptography: package:cryptography (Ed25519 signing) - HTTP Client: Dio - Network / Mesh Plugins: connectivity_plus, flutter_p2p_connection, workmanager (background sync) 4. Protocols & Transports - Bluetooth Low Energy (BLE): Custom 16-byte TR1 beacon discovery - Peer-to-Peer Transport: Wi-Fi Direct & local-only Soft-AP hotspots - Data Specification: Custom byte-identical Canonical JSON specification 5. DevOps & Containerization - Orchestration: Docker & Docker Compose - Web Server / Reverse Proxy: Nginx (Alpine) - Automation: Top-level and subproject Makefiles

Claude 4.8 opus