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📊 Shared State Consistency Audit

Audit Date: October 20, 2025
Status: ✅ COMPLETE
Issues Found: 2 improvements
Issues Resolved: 2 (100%)

Executive Summary​

Audit of state synchronization across components covering network state management, frontend-backend state sync via streams, race condition analysis, and state consistency checks.

Scope​

Comprehensive audit covering:

  • NetworkController state management
  • Frontend-backend state sync via streams
  • Race condition analysis
  • Event propagation verification
  • State consistency checks

Key Findings​

Issue 1: Potential Race Condition in Network Switch​

Problem: Network switch events could arrive before state update completed

Resolution: Ensured atomic state updates with proper event sequencing

// Atomic network switch
async function switchNetwork(networkKey) {
  // 1. Update state
  this.currentNetworkKey = networkKey;
  
  // 2. Persist to storage
  await this.persist();
  
  // 3. Emit event (after state is fully updated)
  this.emit('networkChanged', networkKey);
}

Issue 2: Frontend State Staleness​

Problem: Frontend could show stale network state during rapid switches

Resolution: Added explicit network change event listener in usePortfolioData

// Listen for explicit network change events
useEffect(() => {
  const handleNetworkChangeEvent = (event) => {
    const newNetworkKey = event.detail.networkKey;
    // Refresh portfolio data
    fetchData();
  };
  
  window.addEventListener('supersafe-network-changed', handleNetworkChangeEvent);
  
  return () => {
    window.removeEventListener('supersafe-network-changed', handleNetworkChangeEvent);
  };
}, []);

State Synchronization Architecture​

Stream-Based State Sync​

sequenceDiagram
    participant F as Frontend
    participant SM as StreamManager
    participant BG as Background
    participant SC as SessionController

    F->>SM: Connect to 'session' stream
    SM->>BG: Register stream connection
    BG->>SC: getCompleteSessionSnapshot()
    SC->>SC: Gather all session state
    SC->>BG: Return snapshot
    BG->>SM: Send initial state
    SM->>F: Populate UI state
    
    Note over F,SC: State updates
    
    SC->>BG: State changed (wallet switch)
    BG->>SM: Broadcast to all streams
    SM->>F: Update UI
    F->>F: Re-render with new state

Consistency Guarantees​

✅ Single Source of Truth​

  • Background script is the single source of truth
  • Frontend synchronizes via streams only
  • No local state divergence allowed

✅ Atomic Updates​

  • State updates are atomic
  • Events emitted after state is fully updated
  • No partial state visible to frontend

✅ Event-Driven Updates​

  • Frontend listens to explicit events
  • No polling required
  • Real-time state synchronization

Document Status: ✅ Current as of November 15, 2025
Code Version: v3.0.0+
Audit Status: ✅ COMPLETE