From b1905a21fc8c286ac6ec63084acc73f6689e719d Mon Sep 17 00:00:00 2001
From: thanipro <thanisheun@gmail.com>
Date: Sat, 2 May 2026 10:48:07 +0200
Subject: [PATCH 1/2] partytracks: pass fetchImpl on /generate-ice-servers
 fetch
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

`makePeerConnectionSessionCombo`'s `iceServers` arm of the forkJoin
wasn't passing `fetchImpl: options.fetch`, so even when a consumer
configured a custom `fetch` on `PartyTracksConfig` (e.g. to inject
an Authorization header), the GET fell back to the global `fetch`
with no consumer headers.

The matching `sessionId` arm two lines above already passed
`fetchImpl: options.fetch`. This brings the iceServers arm in line.

No behavior change for consumers without a custom fetch —
`fetchImpl` defaults to global fetch via fromFetch.ts:35.

Caught when `tranqbay/call` ran with an authenticated
`/partytracks/*` proxy: POST /sessions/new succeeded, GET
/generate-ice-servers 401'd. Symmetric NAT clients then fell back
to STUN-only ICE.
---
 packages/partytracks/src/client/PartyTracks.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/partytracks/src/client/PartyTracks.ts b/packages/partytracks/src/client/PartyTracks.ts
index 3546f621..fcb00c81 100644
--- a/packages/partytracks/src/client/PartyTracks.ts
+++ b/packages/partytracks/src/client/PartyTracks.ts
@@ -761,6 +761,7 @@ function makePeerConnectionSessionCombo(options: {
     iceServers: options.iceServers
       ? of(options.iceServers)
       : fromFetch(`${options.prefix}/generate-ice-servers`, {
+          fetchImpl: options.fetch,
           selector: (res) =>
             res
               .json()

From c962b1a2623c98fcfee7a0ebe6c98d625d052d85 Mon Sep 17 00:00:00 2001
From: thanipro <thanisheun@gmail.com>
Date: Sat, 2 May 2026 11:07:35 +0200
Subject: [PATCH 2/2] add changeset for /generate-ice-servers fetchImpl fix

---
 .changeset/sleek-otters-pass-fetch.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/sleek-otters-pass-fetch.md

diff --git a/.changeset/sleek-otters-pass-fetch.md b/.changeset/sleek-otters-pass-fetch.md
new file mode 100644
index 00000000..98cce839
--- /dev/null
+++ b/.changeset/sleek-otters-pass-fetch.md
@@ -0,0 +1,5 @@
+---
+"partytracks": patch
+---
+
+Pass `options.fetch` to `fromFetch` when fetching `/generate-ice-servers`. The matching `sessions/new` request already uses it, so a consumer that wires up a custom `fetch` via `PartyTracksConfig.fetch` (for auth headers, tracing, retries, request signing, etc.) now gets it applied uniformly across both calls instead of just one. No behavior change for consumers that don't pass a custom fetch — `fetchImpl` defaults to the global `fetch` in `fromFetch.ts`.