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Shade/docs/archive/V3.11.md
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release(v4.0.0): Shade GA — V3.x consolidation + audit prep 
V3.1 → V3.12 consolidated and tagged for the first GA release. Wire
format unchanged from 0.4.x — 4.0 peers interoperate with 0.4.x peers
byte-for-byte. The version bump is semantic: audit-cycle complete,
opt-in surface fully exposed, threat model refreshed for every new
surface.

Highlights:
- All 24 @shade/* packages bumped to 4.0.0 in lockstep.
- CHANGELOG 4.0.0 section is the canonical manifest of what landed.
- THREAT-MODEL extended (§10 fingerprint gates, §11 WebRTC P2P, §12
  Web-Worker boundary) + residual-risks table refreshed.
- OpenAPI now covers all 27 routes: prekey, transfer, KT, inbox,
  bridge, observer, /metrics, /healthz, /ready.
- MIGRATION 0.3.x → 4.0 documented + smoke-tested against
  shade migrate-storage on a real SQLite DB.
- docs/audit/REVIEW-BUNDLE.md + SCOPE.md ready for external reviewer.
- scripts/soak.ts harness for the GA-stable 2-week soak window.
- All V*.md plans archived under docs/archive/ with Status: Done.
- Voice/Video carved out into V5.0; 4.0 audit focuses on the frozen
  non-realtime stack.

Tests: TS 1000/1000 + Kotlin 11/11 cross-platform vectors green.
Docker: gt.zyon.no/stian/shade-prekey:4.0.0 builds and reports
  version 4.0.0 on /health.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-03 18:35:35 +02:00

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Shade V3.11 — WebRTC P2P Transport

Status: Done — landet med @shade/transport-webrtc 0.4.0, MultiTransportFallback i @shade/transfer, og shade.configureWebRTC() i @shade/sdk. Se docs/webrtc.md. Effort: XL (2–4 måneder) Forrige: V3.7 Adresserer: V2.1-tillegg "P2P WebRTC transport"

Mål

Direct peer-to-peer datakanal mellom Shade-klienter når NAT/firewall tillater. Primær gevinst: massiv throughput for @shade/transfer (filer, store payloads) og lav-latens for messaging når begge peere er online samtidig. E2EE bevart: WebRTC DTLS-SRTP er transport — payload er fortsatt Shade ratchet-krypto.

V3.11 lander i V4.0-vinduet og er foundation-only — sanntidsbruken (voice, video, broadcast) ligger i V5.0 som downstream konsumer av denne datakanalen.

Scope

Inn

  • Ny pakke @shade/transport-webrtc.
  • Signaling via Shade control plane (eksisterende kanal — Shade.send).
  • ICE/STUN: bruk offentlige STUN-servere som default.
  • TURN: konfigurerbar TURN-relay som fallback.
  • DataChannel for @shade/transfer-chunks.
  • Auto-fallback: P2P → HTTP (eksisterende stack).

Ut

  • SFU/MCU (mange-til-mange topologi) — broadcast/video er V5.0.
  • Voice/video media-tracks — V3.11 er ren datakanal (DataChannel); audio/video over RTP er V5.0.
  • DTLS-fingerprint-binding til Shade-fingerprint (vurderes som hardening, men ikke krav).

Design

Connection-flow

A initierer:
1. createOffer() → SDP
2. shade.send(B, { kind: "webrtc-offer", sdp })
3. B mottar over Shade-kanal, createAnswer()
4. shade.send(A, { kind: "webrtc-answer", sdp })
5. ICE-candidates exchange (samme kanal)
6. DataChannel åpen

Wrapping

DataChannel sender ferdige @shade/transfer-chunks (allerede E2EE). WebRTC's egen DTLS-SRTP fungerer som transport-secrecy lag.

Topologi

  • 1:1 P2P direkte når mulig.
  • TURN-relay når NAT'er er for strenge (transport-only, ser ikke plaintext).

Leveranser

Pakker

  • @shade/transport-webrtc — Connection, DataChannel-wrapper, ICE-config.
  • @shade/transfer utvides: WebRTCTransferTransport som drop-in.
  • FallbackTransferTransport får ny ledd: P2P → WS → HTTP.

Tester

  • Loopback unit: offer/answer/ICE i Bun via node-datachannel eller wrtc.
  • Integration: 100 MB transfer over P2P vs HTTP — P2P skal vinne på samme nettverk.
  • Failover: TURN-relay påtvinger relay-modus.
  • NAT-emulering (loopback med ulike NAT-typer hvis mulig).

Dokumentasjon

  • docs/webrtc.md — setup, STUN/TURN-config, NAT-traversal-håp og -realiteter.

Akseptansekriterier

  • To klienter på samme LAN: P2P direct uten TURN, throughput > 5x HTTP-baseline.
  • To klienter bak strenge NAT'er: TURN-relay aktiveres automatisk.
  • Failover P2P-død → HTTP innen 5 s uten meldingstap.

Avhengigheter

  • V3.7 — bridge-mønstre + fallback-arkitektur.

Risiko

  • NAT-traversal-helvete. Mange edge-cases. Mitiger med tidlige integration-tester på faktiske NAT-konfigurasjoner.
  • Browser-kompatibilitet. Safari har sine egne RTC-quirks.
  • TURN-koster. TURN-relay = ekte trafikk gjennom server. Operatør må vite det.

Migrasjon

Opt-in. Eksisterende HTTP/WS-transport fungerer uendret.

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