Lattice

Lattice is a Rust-based P2P crypto network. It uses a BLE Mesh and mDNS for off-grid uptime. Local hubs track transactions to ensure ground truth without internet, so users gain total autonomy.

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Lattice- About The Project

Inspiration

The crypto space is plagued by information asymmetry. Retail investors often find themselves at a disadvantage, lacking the tools and insights that institutional players use to make informed decisions. We noticed three critical gaps:

  1. Wallet Management Complexity: Users struggle to understand their portfolio composition and often leave SOL locked in unused token accounts
  2. Offline Transaction Limitations: Traditional crypto requires constant internet connectivity, limiting adoption in areas with poor connectivity
  3. Privacy Concerns: On-chain transparency exposes transaction patterns, making users vulnerable to tracking and targeted attacks

We built Solana Whale Tracker to democratize access to professional-grade crypto tools while pioneering offline transaction capabilities and privacy-preserving payment methods.

What It Does

Core Features

1. Real-Time Portfolio Analytics (Helius API Integration)

  • Comprehensive wallet insights using Helius's enhanced Solana RPC APIs
  • Real-time portfolio tracking with SOL and SPL token balances
  • Automatic USD valuation using CoinMarketCap price feeds
  • Multi-wallet aggregation for complete portfolio overview
  • 60-second caching for optimal performance

2. BLE Mesh Network for Offline P2P

  • Bluetooth Low Energy mesh networking for device discovery
  • Peer-to-peer crypto transfers without internet connectivity
  • Store-and-forward routing for extended range
  • Perfect for conferences, remote areas, or network outages
  • Encrypted communication channels

3. Proximity-Based Transfers

  • Discover nearby users via BLE and mDNS
  • Secure authentication using cryptographic challenges
  • Real-time transfer status via WebSocket
  • Session management with automatic cleanup
  • Transfer history and receipt generation

4. Stealth Addresses for Privacy

  • Generate one-time payment addresses
  • ECDH-based key derivation (Curve25519)
  • Viewing tags for efficient payment scanning
  • Hybrid mode with post-quantum cryptography (Kyber)
  • On-chain metadata storage via SPL Memo

5. Whale Tracking & Analytics

  • Monitor large wallet movements in real-time
  • Track whale trading patterns and positions
  • Correlation analysis between whale activity and portfolio performance
  • Automated alerts for significant movements
  • Historical movement analysis

6. P2P Exchange Marketplace

  • Create and accept peer-to-peer trade offers
  • Escrow-based settlement system
  • Reputation and verification system
  • Encrypted chat for negotiation
  • Multi-asset support

8. Cross-Chain Conversions

  • Integrated SideShift and Jupiter aggregators
  • Transparent fee breakdown (network, platform, provider)
  • Quote comparison and best rate selection
  • Conversion history with PDF receipts
  • Multi-blockchain support (Solana, Ethereum, BSC, Polygon)

Tech Stack

Backend (Rust)

  • Framework: Axum (high-performance async web framework)
  • Database: PostgreSQL with Deadpool connection pooling
  • Caching: Redis for portfolio and price caching
  • Blockchain:
    • Solana SDK for native Solana integration
    • Custom circuit breaker and retry logic
  • APIs:
    • Helius RPC for enhanced Solana metrics
    • CoinMarketCap for real-time pricing
    • SideShift for cross-chain swaps
  • Cryptography:
    • Curve25519 for ECDH key exchange
    • Kyber for post-quantum encryption
    • AES-GCM for symmetric encryption
    • Argon2 for password hashing

Frontend

  • Vanilla JavaScript for lightweight, fast UI
  • WebSocket for real-time updates
  • Solana Web3.js for wallet integration
  • CSS for mobile-first design

Infrastructure

  • Modular Crate Architecture:
    • blockchain - Chain interactions
    • database - Data persistence
    • stealth - Privacy features
    • proximity - P2P discovery
    • ble-mesh - Mesh networking
    • api - HTTP/WebSocket server
  • Docker for containerization
  • Environment-based configuration
  • Comprehensive testing (unit, integration, property-based)

Key Dependencies

# Core toml
axum = "0.7"          
tokio = "1.0" 
solana-sdk = "1.18"
spl-token = "4.0"     

# Cryptography
curve25519-dalek = "4.1" 
pqc-kyber = "0.7"         # Post-quantum
aes-gcm = "0.10"          # Encryption

# Database
tokio-postgres = "0.7"   
redis = "0.24"           

# Networking
btleplug = "0.11"     
mdns-sd = "0.10"

Challenges We Faced

1. Offline Transaction Complexity

Challenge: Implementing reliable P2P transfers without internet connectivity required building a complete mesh network stack from scratch.

Solution:

  • Implemented BLE mesh with store-and-forward routing
  • Created custom gossip protocol for message propagation
  • Built fallback mechanisms (BLE → mDNS → WiFi Direct)
  • Designed queue system for delayed transaction submission

2. Privacy vs. Transparency Trade-off

Challenge: Solana's transparent blockchain makes all transactions publicly visible, conflicting with user privacy needs.

Solution:

  • Implemented stealth addresses using ECDH key derivation
  • Added viewing tags for efficient payment scanning
  • Integrated post-quantum cryptography for future-proofing
  • Created temporary wallet system for enhanced privacy

3. Real-Time Data at Scale

Challenge: Providing real-time portfolio updates for multiple users without overwhelming the RPC endpoints.

Solution:

  • Implemented multi-layer caching (Redis + in-memory)
  • Built circuit breaker pattern to prevent cascade failures
  • Created intelligent retry logic with exponential backoff
  • Used WebSocket for efficient real-time updates

4. Cross-Chain Complexity

Challenge: Supporting multiple blockchains with different transaction formats, gas models, and confirmation times.

Solution:

  • Abstracted blockchain interactions behind unified interface
  • Implemented chain-specific clients with common traits
  • Built provider failover system for reliability
  • Created comprehensive error handling for chain-specific issues

5. Account Rent Management

Challenge: Users accumulate empty token accounts that lock up SOL in rent, but closing them manually is tedious and error-prone.

Solution:

  • Automated detection of closeable accounts
  • Batch processing for efficiency (14 accounts per tx)
  • Smart blacklisting to prevent accidental closure
  • Clear UI showing reclaimable SOL before execution

6. Helius API Integration

Challenge: Migrating from Tantum API to Helius required understanding their DAS (Digital Asset Standard) format and handling edge cases.

Solution:

  • Studied Helius documentation and API responses
  • Implemented robust parsing for DAS format
  • Added fallback to direct blockchain queries
  • Created comprehensive error handling

Technical Insights

  1. Rust's Power for Blockchain: Rust's memory safety and performance make it ideal for blockchain applications. The type system caught countless bugs at compile time.

  2. Async Complexity: Managing async operations across WebSocket connections, database queries, and blockchain RPC calls required deep understanding of Tokio's runtime.

  3. Bluetooth LE Limitations: BLE has strict packet size limits and connection reliability issues that required creative solutions with very limited resources

  4. Circuit Breaker Importance: External API failures can cascade. Circuit breakers are essential for maintaining system stability.

  5. Caching Strategy: Multi-layer caching (Redis for shared state, in-memory for hot data) dramatically improved performance while reducing RPC costs.

Blockchain Insights

  1. Solana's Speed: Solana's 400ms block times enable near-instant confirmations, making it perfect for real-time applications.

  2. Account Model Complexity: Solana's account model is powerful but complex. Understanding rent, account ownership, and PDAs is crucial.

  3. RPC Reliability: Public RPC endpoints are unreliable. Production apps need dedicated nodes or premium RPC services like Helius.

  4. Transaction Size Limits: Solana's 1232-byte transaction limit requires careful instruction batching.

Product Insights

  1. Privacy Matters: Users care deeply about transaction privacy. Stealth addresses and temporary wallets are highly valued features.

  2. Offline Capability: The ability to transact without internet is a game-changer for adoption in developing regions.

  3. Account Cleanup: Many users don't realize they have SOL locked in empty accounts. Automated detection is a huge value-add.

What Makes This Project Stand Out

1. Offline-First Architecture

We're one of the few crypto applications that works without internet connectivity. Our BLE mesh network enables true peer-to-peer transactions anywhere.

2. Privacy by Design

Stealth addresses with post-quantum cryptography future-proof user privacy. We're preparing for the quantum computing era today.

3. Production Grade Rust Backend

Our modular crate architecture, comprehensive testing, and robust error handling demonstrate enterprise-level engineering.

4. Real-Time Everything

WebSocket connections provide instant updates for portfolio changes, whale movements, and P2P transfers.

5. Multi-Chain Support

Seamless integration with Solana, Ethereum, BSC, and Polygon through unified interfaces.

6. Intelligent Automation

Agentic trimming, auto-staking, and price benchmarks automate complex trading strategies.

Impact

  • Democratizes Access: Professional-grade tools for retail investors
  • Enhances Privacy: Protects users from on-chain surveillance
  • Enables Offline: Brings crypto to areas with poor connectivity
  • Saves Money: Free account cleanup saves users real SOL
  • Educates Users: Transparent analytics help users understand their holdings

Built with ❤️ for the Solana ecosystem

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