Pull-mode httpClient + drainer + parallel RPCs against the same peer deteriorated after ~10s with `DecryptionError`. Two bugs combined: - `OutboundQueue.enqueue` woke `drain` waiters with a `since=0` snapshot, replaying already-processed events into `Shade.acceptTransferEnvelope` → `manager.decrypt` twice. The duplicate consumed an already-used skipped key and corrupted the Double Ratchet receive chain. - `ratchetDecrypt` then propagated the corruption: a same-DH message behind the chain with no cached skipped key fell through to `kdfChainKey` on the ahead state and rewound `chain.counter`, permanently desyncing the chain. Fix `OutboundQueue` to honor each waiter's `since`, and harden `ratchetDecrypt` so any future duplicate fails cleanly without mutating state. Adds regression coverage at all three layers. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
@shade/transport-webrtc
V3.11 — direct peer-to-peer chunk transport for Shade transfers via
RTCDataChannel. Plugs into @shade/transfer's ITransferTransport
contract and wires automatically into @shade/sdk via
shade.configureWebRTC().
import { createShade } from '@shade/sdk';
import { nativeRtcFactory } from '@shade/transport-webrtc';
const shade = await createShade({ prekeyServer });
shade.configureWebRTC({ factory: nativeRtcFactory() });
shade.configureTransfers({ resolveBaseUrl });
await shade.upload({ to: 'bob', input: file }); // → P2P when NAT allows,
// HTTP otherwise.
See docs/webrtc.md for the full guide: NAT-traversal realities, TURN config, glare resolution, wire format, diagnostics, and end-to-end test recipes.
What's inside
WebRtcConnection— one peer connection between two Shade endpoints, driving offer/answer/ICE through Shade's own ratchet.WebRtcConnectionManager— per-peer pool with deterministic glare resolution.WebRtcSignalingChannel— JSON signaling messages multiplexed overShade.send/Shade.onMessage.WebRtcTransferTransport— implementsITransferTransportover the managed DataChannel; ack-correlated by 16-byte requestId tokens.MemoryRtcFactory— in-process WebRTC simulator for tests.nativeRtcFactory()— adapter overglobalThis.RTCPeerConnection(browsers / Deno / Cloudflare Workers).
Adapters
@shade/transport-webrtc ships only the standard-API adapter
(nativeRtcFactory). For Bun / Node, wrap your library of choice
behind the IRtcFactory interface — only createPeerConnection,
createDataChannel, and standard addEventListener are required.
Recommended adapters: