From 474296747355a7a721925bfe31507bd2ca2c0a8b Mon Sep 17 00:00:00 2001
From: Bernard Gawor <gaworbernard@gmail.com>
Date: Thu, 10 Sep 2026 11:50:32 +0200
Subject: [PATCH 1/2] Regenerate the composition client against the current
 spec

The register-input response now reports publish_url in place of port.
---
 .../src/generated/models/RegisterInputResponse.ts        | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/packages/composition-openapi/src/generated/models/RegisterInputResponse.ts b/packages/composition-openapi/src/generated/models/RegisterInputResponse.ts
index febbebac..92cf5e69 100644
--- a/packages/composition-openapi/src/generated/models/RegisterInputResponse.ts
+++ b/packages/composition-openapi/src/generated/models/RegisterInputResponse.ts
@@ -45,10 +45,10 @@ export interface RegisterInputResponse {
   audioDurationMs?: number | null;
   /**
    *
-   * @type {number}
+   * @type {string}
    * @memberof RegisterInputResponse
    */
-  port?: number | null;
+  publishUrl?: string | null;
 }
 
 /**
@@ -87,7 +87,8 @@ export function RegisterInputResponseFromJSONTyped(json: any, ignoreDiscriminato
         : json['audio_duration_ms'] === null
           ? null
           : json['audio_duration_ms'],
-    port: json['port'] === undefined ? undefined : json['port'] === null ? null : json['port'],
+    publishUrl:
+      json['publish_url'] === undefined ? undefined : json['publish_url'] === null ? null : json['publish_url'],
   };
 }
 
@@ -108,6 +109,6 @@ export function RegisterInputResponseToJSONTyped(
     endpoint_route: value['endpointRoute'],
     video_duration_ms: value['videoDurationMs'],
     audio_duration_ms: value['audioDurationMs'],
-    port: value['port'],
+    publish_url: value['publishUrl'],
   };
 }

From da514cc69d4eaecc0e9057fe1c6e35662ee40055 Mon Sep 17 00:00:00 2001
From: Bernard Gawor <gaworbernard@gmail.com>
Date: Thu, 10 Sep 2026 11:54:56 +0200
Subject: [PATCH 2/2] Return the RTMP publishing address from registerRtmpInput

The server now reports a complete publish URL, so the caller no longer has
to build one from the composition origin and a port.
---
 packages/js-server-sdk/src/composition.ts     | 15 ++++++++++---
 .../js-server-sdk/tests/composition.test.ts   | 22 ++++++++++++++++---
 2 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/packages/js-server-sdk/src/composition.ts b/packages/js-server-sdk/src/composition.ts
index 874e676a..1606474b 100644
--- a/packages/js-server-sdk/src/composition.ts
+++ b/packages/js-server-sdk/src/composition.ts
@@ -209,14 +209,23 @@ export class CompositionClient {
 
   /**
    * Register an input that an RTMP publisher pushes media into. The stream key identifies the
-   * input; the address to publish to belongs to the composition, not to this call.
+   * input and is carried in the returned address.
+   * @returns the address to publish the RTMP stream to
    */
   async registerRtmpInput(
     compositionId: CompositionId,
     inputId: InputId,
     options: Omit<RtmpInput, 'type'>
-  ): Promise<void> {
-    await this.registerInput(compositionId, inputId, { ...options, type: 'rtmp_server' });
+  ): Promise<string> {
+    const { publishUrl } = await this.registerInput(compositionId, inputId, { ...options, type: 'rtmp_server' });
+
+    if (!publishUrl) {
+      throw new UnknownException({
+        message: `Could not obtain a publishing address for input "${inputId}", retry or report it`,
+      });
+    }
+
+    return publishUrl;
   }
 
   /**
diff --git a/packages/js-server-sdk/tests/composition.test.ts b/packages/js-server-sdk/tests/composition.test.ts
index 9ff3e7ea..9697ecd0 100644
--- a/packages/js-server-sdk/tests/composition.test.ts
+++ b/packages/js-server-sdk/tests/composition.test.ts
@@ -67,13 +67,13 @@ describe('request serialisation', () => {
   });
 
   it('reads a response back into camelCase', async () => {
-    stubFetch({ port: 5004 });
+    stubFetch({ publish_url: 'rtmps://rtmp.example.com:443/key' });
     const response = await client().registerInput(COMPOSITION_ID, INPUT_ID, {
       type: 'rtmp_server',
       streamKey: 'key',
     });
 
-    expect(response).toEqual({ port: 5004 });
+    expect(response).toEqual({ publishUrl: 'rtmps://rtmp.example.com:443/key' });
   });
 });
 
@@ -108,6 +108,22 @@ describe('input variants', () => {
     await expect(client().registerWhipInput(COMPOSITION_ID, INPUT_ID)).rejects.toThrow(UnknownException);
   });
 
+  it('returns the RTMP publishing address the server chose', async () => {
+    stubFetch({ publish_url: 'rtmps://rtmp.example.com:443/k' });
+
+    await expect(client().registerRtmpInput(COMPOSITION_ID, INPUT_ID, { streamKey: 'k' })).resolves.toBe(
+      'rtmps://rtmp.example.com:443/k'
+    );
+  });
+
+  it('throws when the server returns no RTMP publishing address', async () => {
+    stubFetch({});
+
+    await expect(client().registerRtmpInput(COMPOSITION_ID, INPUT_ID, { streamKey: 'k' })).rejects.toThrow(
+      UnknownException
+    );
+  });
+
   it('sends the discriminant for each variant', async () => {
     const cases = [
       [(c: CompositionClient) => c.registerWhipInput(COMPOSITION_ID, INPUT_ID), 'whip_server'],
@@ -120,7 +136,7 @@ describe('input variants', () => {
     ] as const;
 
     for (const [register, type] of cases) {
-      const fetch = stubFetch({ bearer_token: 'tok' });
+      const fetch = stubFetch({ bearer_token: 'tok', publish_url: 'rtmps://rtmp.example.com:443/k' });
       await register(client());
       expect(requestBody(fetch).type).toBe(type);
       vi.unstubAllGlobals();