feat: Add outbound example (#237)

Author: MatthiasGruba

examples/package.json

@@ -20,6 +20,7 @@
     "@livekit/agents-plugin-elevenlabs": "workspace:*",
     "@livekit/agents-plugin-openai": "workspace:*",
     "@livekit/agents-plugin-silero": "workspace:*",
+    "livekit-server-sdk": "^2.9.2",
     "@livekit/rtc-node": "^0.12.1",
     "zod": "^3.23.8"
   },

examples/src/outbound.ts

@@ -0,0 +1,71 @@
+// SPDX-FileCopyrightText: 2024 LiveKit, Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+import {
+  type JobContext,
+  type JobProcess,
+  WorkerOptions,
+  cli,
+  defineAgent,
+  llm,
+  pipeline,
+} from '@livekit/agents';
+import * as deepgram from '@livekit/agents-plugin-deepgram';
+import * as elevenlabs from '@livekit/agents-plugin-elevenlabs';
+import * as openai from '@livekit/agents-plugin-openai';
+import * as silero from '@livekit/agents-plugin-silero';
+import { SipClient } from 'livekit-server-sdk';
+import { fileURLToPath } from 'node:url';
+
+export default defineAgent({
+  prewarm: async (proc: JobProcess) => {
+    proc.userData.vad = await silero.VAD.load();
+  },
+  entry: async (ctx: JobContext) => {
+    const vad = ctx.proc.userData.vad! as silero.VAD;
+
+    await ctx.connect();
+
+    const sipClient = new SipClient(
+      process.env.LIVEKIT_URL ?? '',
+      process.env.LIVEKIT_API_KEY,
+      process.env.LIVEKIT_API_SECRET,
+    );
+
+    const trunkId = '...'; // create this with the CLI: https://docs.livekit.io/agents/quickstarts/outbound-calls/
+    const phoneNumber = '...'; // read this from the metadata or hardcode it - e.g.: 'tel:+43.....'
+    const roomName = ctx.room.name ?? '';
+    const participantIdentity = 'Example participant identity';
+
+    const sipParticipantOptions = {
+      participantIdentity,
+      participantName: 'Example participant name',
+    };
+
+    console.log('came here');
+    await sipClient.createSipParticipant(trunkId, phoneNumber, roomName, sipParticipantOptions);
+
+    const participant = await ctx.waitForParticipant(participantIdentity);
+
+    const initialContext = new llm.ChatContext().append({
+      role: llm.ChatRole.SYSTEM,
+      text: 'You are a helpful assistant.',
+    });
+
+    const agent = new pipeline.VoicePipelineAgent(
+      vad,
+      new deepgram.STT(),
+      new openai.LLM(),
+      new elevenlabs.TTS(),
+      {
+        chatCtx: initialContext,
+      },
+    );
+
+    agent.start(ctx.room, participant);
+
+    await agent.say('Hello - how can I help?', true);
+  },
+});
+
+cli.runApp(new WorkerOptions({ agent: fileURLToPath(import.meta.url) }));