i linked twilio with LK , so how can i get the callSid

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import ParticipantKind from where

Hey there! To import

ParticipantKind

in LiveKit, here’s a quick guide depending on the programming language you’re using: • JavaScript/TypeScript:

import { ParticipantKind } from '@livekit/client-sdk-js';

• Python:

from livekit.rtc import participant_pb2 as participant

(then you can access it as

participant.ParticipantKind

) • Swift:

import LiveKit

• Dart/Flutter:

import 'package:livekit_client/livekit_client.dart';

• Rust:

use livekit::proto::ParticipantKind;

If you have any questions or need a hand with anything else, just let me know—I’m here to help! Sources: src/index.ts | livekit-protocol/livekit/protocol/models.pyi | Sources/LiveKit/Participant/Participant+Kind.swift | lib/src/ui/builder/participant/participant_kind.dart | livekit/src/room/participant/mod.rs

import asyncio import os from dotenv import load_dotenv import json import re from livekit.rtc.participant_pb2 import ParticipantKind from livekit import agents from livekit.agents import AgentSession, Agent, RoomInputOptions, cli from livekit.plugins import ( noise_cancellation, google ) from livekit.agents import ( Agent, AgentSession, JobContext, WorkerOptions, cli, function_tool ) from prompt_services import prompts from tool_services import tools from resources.constants import get_constant load_dotenv() import time from db_implementations.mongo_implementation import MongoDBClient from prompt_services.prompt_services import get_bot_system_prompt # Global variables to store context and session for call termination _ctx = None _session = None _call_sid = None # Store the extracted Call SID client = MongoDBClient("teliphoney_bot_v1_db") def extract_call_sid_from_participant(participant, room_name): """ Extract Call SID from various sources in order of preference: 1. Participant metadata (JSON format) 2. Participant metadata (raw string) 3. Participant identity 4. Room name pattern 5. SIP headers (if available) """ call_sid = None print(f"🔍 Attempting to extract Call SID for participant: {participant.identity}") # Method 1: Try parsing metadata as JSON if participant.metadata: print(f"📋 Raw metadata: '{participant.metadata}'") try: metadata = json.loads(participant.metadata) print(f"📋 Parsed metadata: {metadata}") # Check various possible key names for Call SID possible_keys = ['callSid', 'call_sid', 'CallSid', 'CALL_SID', 'twilio_call_sid', 'sid'] for key in possible_keys: if key in metadata: call_sid = metadata[key] print(f"🔥 CALL SID found in metadata['{key}']: {call_sid}") return call_sid except json.JSONDecodeError: print("⚠️ Metadata is not valid JSON, trying as raw string") # Method 2: Search for Call SID pattern in raw metadata string # Twilio Call SIDs typically start with 'CA' followed by 32 hex characters call_sid_pattern = r'CA[a-f0-9]{32}' match = re.search(call_sid_pattern, participant.metadata, re.IGNORECASE) if match: call_sid = match.group(0) print(f"🔥 CALL SID found in raw metadata: {call_sid}") return call_sid # Method 3: Check participant identity for Call SID if participant.identity: print(f"🆔 Checking participant identity: {participant.identity}") call_sid_pattern = r'CA[a-f0-9]{32}' match = re.search(call_sid_pattern, participant.identity, re.IGNORECASE) if match: call_sid = match.group(0) print(f"🔥 CALL SID found in participant identity: {call_sid}") return call_sid # Method 4: Extract from room name pattern # Assuming room name might contain Call SID print(f"🏠 Checking room name: {room_name}") call_sid_pattern = r'CA[a-f0-9]{32}' match = re.search(call_sid_pattern, room_name, re.IGNORECASE) if match: call_sid = match.group(0) print(f"🔥 CALL SID found in room name: {call_sid}") return call_sid # Method 5: Check for any other patterns that might be Call SID # Sometimes the last part of room name could be Call SID room_parts = room_name.split('_') for part in room_parts: if len(part) >= 30: # Call SIDs are typically 34 characters print(f"🔍 Potential Call SID candidate: {part}") # You can add more validation here if part.startswith('CA') or len(part) == 34: call_sid = part print(f"🔥 POTENTIAL CALL SID from room parts: {call_sid}") return call_sid print("❌ No Call SID found in any source") return None async def entrypoint(ctx: agents.JobContext): global _ctx, _session, _call_sid _ctx = ctx # Store context globally for end_call function system_prompt = """ you are a helpful assistant your name is Summer instructions:- before ending the call say it was nice talking to you and then use the end_call function when the conversation is complete or the caller wants to hang up, always call the end_call function """ print("room_name", ctx.room) print("building prompt") parts = str(ctx.room.name).split("_") service_id = parts[1] if len(parts) > 1 else "unknown" caller_number = parts[2] if len(parts) > 2 else "unknown" await ctx.connect() # Enhanced participant event listener def on_participant_connected(participant): global _call_sid print(f"👤 Participant connected: {participant.identity}") print(f"📞 Participant kind: {participant.kind}") print(f"📋 Participant metadata: '{participant.metadata}'") # Check if it's a SIP participant if participant.kind == 3: # SIP participant type print("🔌 SIP Participant detected!") # Extract Call SID using our comprehensive method _call_sid = extract_call_sid_from_participant(participant, ctx.room.name) if _call_sid: print(f"✅ SUCCESSFULLY EXTRACTED CALL SID: {_call_sid}") # Store Call SID for later use (e.g., in tools for ending call) # You can save this to database or pass to your tools else: print("❌ Could not extract Call SID from any source") print("🔧 Debug info:") print(f" - Room name: {ctx.room.name}") print(f" - Participant identity: {participant.identity}") # print(f" - ParticipantKind.SIP: {participant.attributes['sip.twilio.callSid']}") print(f" - Participant metadata: '{participant.metadata}'") print(f" - Participant kind: {participant.kind}") else: print(f"👤 Non-SIP participant (kind: {participant.kind})") # Method to get current Call SID def get_current_call_sid(): return _call_sid # Register the event listener ctx.room.on("participant_connected", on_participant_connected) session_ctx = tools.SessionContext(ctx) # You can also pass the Call SID getter to your tools session_ctx.get_call_sid = get_current_call_sid class AssistantWithNotes(Agent): def __init__(self, prompt="you are a helpful assistant") -> None: super().__init__( instructions=prompt, tools=[ # session_ctx.end_call ] ) # Create session and store globally _session = AgentSession( llm=google.beta.realtime.RealtimeModel( model="gemini-2.0-flash-exp", voice="Aoede", temperature=0.8, instructions="start with a greeting", ), ) print("session created") await _session.start( room=ctx.room, agent=AssistantWithNotes(prompt=system_prompt), room_input_options=RoomInputOptions( noise_cancellation=noise_cancellation.BVC(), ), ) print("Room created:", ctx.room) await _session.generate_reply( instructions="start with a greeting and say that you have reached <org name>", ) import logging if name == "__main__": # Configure logging for better debugging logging.basicConfig( level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s' ) # Run the agent with the name that matches your dispatch rule cli.run_app(WorkerOptions( entrypoint_fnc=entrypoint, agent_name="telephony_agent", num_idle_processes=3 )) i just want to print the partecipant callSid so i can use it to terminate call from twilio itself

To print the participant's

callSid

so you can use it to end a call from Twilio, here’s a simple way to do it: 1. First, make sure the participant is a SIP participant by checking

participant.kind == ParticipantKind.SIP

. 2. Then, grab the

callSid

from the participant’s attributes with

participant.attributes['sip.twilio.callSid']

. 3. Finally, print out the

callSid

to double-check you’ve got it. Here’s a quick example you can try:

if participant.kind == ParticipantKind.SIP:
    call_sid = participant.attributes.get('sip.twilio.callSid')
    if call_sid:
        print(f"Call SID: {call_sid}")
    else:
        print("Call SID not found in participant attributes.")

If you want me to walk you through anything else or have questions, just let me know—I’m here to help!

Traceback (most recent call last): File "/home/amansharma/projects/voice_agent/app/teliphoney_agent_v2.py", line 6, in <module> from livekit.rtc.participant_pb2 import ParticipantKind ModuleNotFoundError: No module named 'livekit.rtc.participant_pb2'

It looks like the

participant_pb2

module is missing, which is causing that error. No worries though—here’s a friendly step-by-step to help you fix it: 1. *Reinstall the LiveKit RTC package:*`pip uninstall livekit-rtc pip install livekit-rtc` 2. Check if protobuf files are generated: If you’re working from the source code, just run:`cd livekit-rtc ./generate_proto.sh` 3. Verify the package structure: Make sure the

participant_pb2.py

file is actually in

livekit/rtc/_proto/

. You can quickly check with this snippet:`import os import livekit.rtc package_dir = os.path.dirname(livekit.rtc.file) proto_dir = os.path.join(package_dir, '_proto') participant_pb2_path = os.path.join(proto_dir, 'participant_pb2.py') print(f"Proto directory exists: {os.path.exists(proto_dir)}") print(f"participant_pb2.py exists: {os.path.exists(participant_pb2_path)}")` 4. *Install protobuf dependencies:*`pip install protobuf>=4.21.0` 5. Try using a virtual environment: It’s a clean way to avoid conflicts—just create one and reinstall like this:`python -m venv livekit_env source livekit_env/bin/activate # On Windows: livekit_env\Scripts\activate pip install livekit-rtc` If you hit any bumps or want me to walk you through any of these steps, just give me a shout—I’m here to help! Sources: livekit-rtc/livekit/rtc/_proto/room_pb2.pyi

(.venv) amansharma@test-MS-7D70:~/projects/voice_agent$ pip install livekit-rtc ERROR: Could not find a version that satisfies the requirement livekit-rtc (from versions: none) ERROR: No matching distribution found for livekit-rtc

Hey! Just a quick heads-up—the right package to install is

livekit

, not

livekit-rtc

. Could you give this command a try?

pip install livekit

If you run into any more trouble, feel free to reach out—I’m here to help! Sources: livekit-protocol/livekit/protocol/models.py