Sterister
96c20cb4b2
aliasSession knew that two labels name the same peer, then threw that knowledge away. The binding lived only in the caller's memory, so a restart lost it — and the peer could not repair it from its side. First contact forces the receiver to label a session by the only sender hint a relay surfaces, an 8-byte signing-key fingerprint (`fp:<hex>`). Once the peer announces its canonical address, aliasSession moves the session there. But the peer keeps sending under `fp:<hex>`, because its transport derives the same label from the same hint every time. After a restart the session sat under the canonical address, inbound frames resolved to `fp:<hex>`, and nothing matched. The peer held a valid session so it never re-ran X3DH: the failure was permanent, and only a manual re-link cleared it. Observed in Prism as `No session for address: fp:579c3b335d66e2c0` on every receive for three days, with a phone whose every RPC timed out. StorageProvider gains saveSessionAlias / getSessionAlias / removeSessionAliasesFor, optional so third-party implementations keep compiling, and implemented across all seven backends. Lookups resolve through resolveLabel(), which runs BEFORE the peer mutex — locking the alias while mutating the canonical session would let an aliased and a canonical caller ratchet the same state concurrently. A live session under a label always wins over an alias, and prekey envelopes never resolve: both keep a re-link establishing a fresh session instead of being redirected into the stale one. Aliases are dropped in resetSession and acceptIdentityChange, and memoized so the hot path costs no extra read. The sdk.test.ts case that asserted a dead fp-label encoded the old behaviour; it now pins the new contract. Verified: 1166 tests pass (from 1160). With alias persistence disabled as a negative control, 5 of the 6 new tests fail, including both restart cases. Also drops `baseUrl` from the consumer-strict tsconfig — removed in TS 6.0, and it was failing the typecheck that gates publishing. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
@shade/observer
Live observability backend for Shade — exposes a snapshot endpoint, an SSE event stream, and serves the bundled dashboard SPA.
Install
bun add @shade/observer @shade/server @shade/core
Usage
import { createObserver } from '@shade/observer';
import { ShadeEventEmitter, ShadeSessionManager } from '@shade/core';
import { PrekeyServerEvents, createPrekeyServer } from '@shade/server';
// 1. Create event emitters
const clientEvents = new ShadeEventEmitter();
const serverEvents = new PrekeyServerEvents();
// 2. Wire them into your session manager and prekey server
const manager = new ShadeSessionManager(crypto, storage, { events: clientEvents });
const prekeyServer = createPrekeyServer({ crypto, events: serverEvents });
// 3. Create the observer
const observer = createObserver({
token: process.env.SHADE_OBSERVER_TOKEN!,
clientEvents,
serverEvents,
});
// 4. Mount or serve standalone
import { Hono } from 'hono';
const app = new Hono();
app.route('/shade-observer', observer);
Bun.serve({ port: 3900, fetch: app.fetch });
After this, visit http://localhost:3900/shade-observer/dashboard/ and enter your bearer token to see the dashboard.
Endpoints
| Method | Path | Auth | Description |
|---|---|---|---|
| GET | /api/state |
Bearer | Current snapshot (identity, sessions, prekeys, server stats) |
| GET | /api/events |
Bearer (or ?token=) |
SSE stream of live events |
| GET | /dashboard/ |
None | Bundled web UI |
| GET | /health |
None | Liveness check |
Configuration
| Env var | Required | Description |
|---|---|---|
SHADE_OBSERVER_TOKEN |
Yes | Bearer token (min 16 chars). Refuses to start if shorter. |
The token is checked with constant-time comparison.
Security notes
- Event payloads contain NO key material, plaintext, or signatures — only structural facts (counters, addresses, short hashes for display).
- The observer is intended for internal/debugging use. Put it behind a reverse proxy and authenticate access.
- The dashboard stores the bearer token in
localStoragefor convenience. Don't load the dashboard on shared computers.