Reading "who is signed in" on a page required mounting the whole widget
(bitlogin.js + crypto worker + wasm, ~1.6MB) because that was the only
thing that restored the per-origin session. Multi-page sites paid the
full load on every page just to render a "Signed in as …" header.
Write a cleartext, public-only record ({ pubkey, npub, name? } — never
key material) beside the encrypted session in IndexedDB, in lockstep with
it: the worker writes it at the single persistSession() choke point,
self-heals it on restoreSession (so sessions cached before this feature
upgrade with no re-login), and clears it on logout, so a reported session
can never outlive the real one.
Add @bitlogin/widget/session -> bitlogin-session.js: a self-contained
~1KB gzip reader (zero imports, no worker/wasm) exposing
readCachedSession(): Promise<{ pubkey, npub, name? } | null>. Mirror the
same call on window.bitlogin.readCachedSession() for pages that already
load the full widget.
The private key stays in the AES-GCM record in sessionCache.ts, exactly
as protected as before. Reader falls through to null for every failure
mode (DB/store absent, IndexedDB blocked), which reads as "not signed in".
Addresses the top item of the Tessera integration feedback (docs/TODO.md).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01BXQCvJPA6sVSQ5j8uBd9bB
