go-live reads the slot's WHIP address with the SDK's live.whip.forSlot (OpenRestream-ingested slots too) (#34)

ddiff --git a/examples/go-live/README.md b/examples/go-live/README.md
iindex f0949e6..87ed3ee 100644
---- a/examples/go-live/README.md
++++ b/examples/go-live/README.md
@@@ -42,7 +42,7 @@ OV_SOURCE=talk.mp4 OV_SECONDS=0 node --env-file=.env go-live.js     # a file, un
  
  | File | What |
  |---|---|
--| `go-live.js` | `loadConfig()`, `createLive()`, `ensureSlot()`, `whipUrl()`, `ffmpegArgs()`, `waitForSession()`, `goLive()`, CLI |
++| `go-live.js` | `loadConfig()`, `createLive()`, `ensureSlot()`, `whipUrl()` (the SDK's `live.whip.forSlot`), `ffmpegArgs()`, `waitForSession()`, `goLive()`, CLI |
  | `test/smoke.test.js` | the whole run against a stand-in for Live's routes and a fake FFmpeg |
  
  ## Run the smoke test
ddiff --git a/examples/go-live/go-live.js b/examples/go-live/go-live.js
iindex e2dcc07..e923687 100644
---- a/examples/go-live/go-live.js
++++ b/examples/go-live/go-live.js
@@@ -62,14 +62,17 @@ async function ensureSlot({ live }, config) {
      return { slot, created: true };
  }
  
--/** The slot's WHIP URL (docs: https://openvibe.live/docs/whip#getting-your-whip-url). */
--async function whipUrl({ client }, slotId) {
--    const profile = await client.json({ service: 'live', audience: 'openvibe.live', path: `/api/streams/managed/${Number(slotId)}/profile` });
--    if (!profile.stream_key || !profile.whip_url_base) {
--        // A slot OpenRestream ingests publishes there, not to Live's WHIP.
--        throw new Error(`slot ${slotId} has no Live WHIP URL${profile.ingest_authority ? ` (its ingest is ${profile.ingest_authority})` : ''}`);
++/**
++ * The slot's WHIP URL (docs: https://openvibe.live/docs/whip#getting-your-whip-url), from the SDK's live.whip.forSlot:
++ * Live's WHIP origin with the slot's key, or OpenRestream's own WHIP URL when OpenRestream ingests the slot.
++ */
++async function whipUrl({ live }, slotId) {
++    try {
++        return (await live.whip.forSlot(slotId)).url;
++    } catch (err) {
++        if (err instanceof TypeError) throw new Error(`slot ${slotId}: ${err.message.replace(/^live\.whip\.forSlot: /, '')}`);
++        throw err;
      }
--    return `${String(profile.whip_url_base).replace(/\/+$/, '')}/whip/${profile.stream_key}`;
  }
  
  /**
ddiff --git a/examples/go-live/test/smoke.test.js b/examples/go-live/test/smoke.test.js
iindex 8b0764a..d26fcdf 100644
---- a/examples/go-live/test/smoke.test.js
++++ b/examples/go-live/test/smoke.test.js
@@@ -35,6 +35,9 @@ async function fakeFetch(url, init = {}) {
      if (method === 'GET' && u.pathname === '/api/streams/managed/41/profile') {
          return json(200, { managed_stream: { id: 41, title: 'Robot cam' }, stream_key: KEY, whip_url_base: 'https://whip.openvibe.live', rtmp_url: 'rtmp://openvibe.live:1935/live' });
      }
++    if (method === 'GET' && u.pathname === '/api/streams/managed/43/profile') {
++        return json(200, { managed_stream: { id: 43 }, stream_key: null, whip_url: 'https://ingest.openre.stream/whip/orw_example', ingest_authority: 'openre' });
++    }
      if (method === 'GET' && u.pathname === '/api/streams/managed/42/profile') {
          return json(200, { managed_stream: { id: 42 }, stream_key: null, whip_url_base: null, ingest_authority: 'openre' });
      }
@@@ -80,8 +83,9 @@ function fakeFfmpeg(record) {
  
      const sdk = createLive(config, { fetch: fakeFetch });
  
--    // A slot from another ingest has no Live WHIP URL: said plainly.
--    await assert.rejects(whipUrl(sdk, 42), /slot 42 has no Live WHIP URL \(its ingest is openre\)/);
++    // A slot OpenRestream ingests publishes to OpenRestream's WHIP URL; one with no WHIP address at all says so plainly.
++    assert.equal(await whipUrl(sdk, 43), 'https://ingest.openre.stream/whip/orw_example');
++    await assert.rejects(whipUrl(sdk, 42), /^Error: slot 42: this slot has no WHIP address/);
  
      // The whole run: a new WHIP slot, its WHIP URL, FFmpeg, the session named, the stream ended.
      const runs = [];