Browser Storage as the Financial Vault

Sovereign Engineering · Part 5

Guest: localPortfolioStore.ts

const STORAGE_KEY_TRADES = 'pocket-portfolio-local-trades';

Trades JSON + metadata; quota estimated vs 5MB budget — fail closed when over threshold.

Auth: useTrades → TradeService.getTrades(uid, forceServerFetch)

Cloud is authoritative for signed-in users; UI still filters healed IDs from localStorage.

Prefs: portfolioStore persist + partialize

Only chart view, time range, sectors, benchmarks — not full positions blob.

Logout: useAuth → clearIndexedDbPersistence + terminate(db)

Clears Firestore client cache (IndexedDB), not “the vault” for guests.

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Read the Sovereign Intelligence book or try Pocket Portfolio.