i'm using agent with twilio sip and when the caller hangs up the agent is still continuing

Thanks for reaching out, Weilan. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

I already have this and it works when the agent hangs up but what if the caller hangs up

Hey there! Let me walk you through a super helpful way to handle what happens when a caller decides to hang up. It's actually pretty straightforward - you'll want to keep an eye on the call status of your SIP participant, specifically watching for when it changes to

hangup

. Think of it like listening for a signal that says, "Hey, I'm done with this call!" Here's a friendly example that shows exactly how to do this:

async def entrypoint(ctx: JobContext):
    await ctx.connect()
    session = AgentSession()
    agent = YourAgent(job_context=ctx)
    await session.start(agent=agent, room=ctx.room)

    async def async_on_participant_attributes_changed(changed_attributes: dict, participant: rtc.Participant):
        if participant.kind == rtc.ParticipantKind.PARTICIPANT_KIND_SIP:
            if 'sip.callStatus' in changed_attributes:
                call_status = changed_attributes['sip.callStatus']
                if call_status == 'hangup':
                    await cleanup_call(ctx)

    def on_participant_attributes_changed_handler(changed_attributes: dict, participant: rtc.Participant):
        asyncio.create_task(async_on_participant_attributes_changed(changed_attributes, participant))

    ctx.room.on("participant_attributes_changed", on_participant_attributes_changed_handler)

async def cleanup_call(ctx: JobContext):
    await ctx.api.room.delete_room(
        api.DeleteRoomRequest(
            room=ctx.room.name,
        )
    )

What this does is pretty cool - when the SIP caller hangs up, it'll automatically wrap things up by deleting the room and ending the agent session. No loose ends, no fuss! Sources: Agents telephony integration | LiveKit Docs | telephony/sip_lifecycle.py

why does it need asyncio.create_task

Hey there! Let me break down why we use

asyncio.create_task

in the

participant_attributes_changed

event handler. Think of it like a helpful workaround for LiveKit's event system. Basically, LiveKit's event handlers are synchronous (like a quick chat), but sometimes you need to do some async tasks (like cleaning up a room) that take a bit more time. By using

asyncio.create_task

, you're basically saying, "Hey, go do this task in the background while I keep things moving!" • Your event system stays smooth and responsive - no waiting around! • Your async tasks (like room deletion) get handled without interrupting the flow It's a super common approach when you're working with LiveKit and need to juggle sync and async tasks. Pretty neat, right? Sources: telephony/sip_lifecycle.py | agent/main.py | examples/participant_attributes.py

can I move the on_participant_attributes_changed_handler and async_on_participant_attributes_changed to outside of the entrypoint fxn?

Hey there! Let me break down how you can define

on_participant_attributes_changed_handler

and

async_on_participant_attributes_changed

outside the

entrypoint

function. I totally get that you might want more flexibility with your code placement. • Just keep in mind that when you define handlers inside

entrypoint

, they naturally have access to cool local variables like

ctx

(your JobContext) and other resources. • If you decide to move these functions outside, no worries! You'll just need to pass along any dependencies like

ctx

or agent instances as parameters to your handler functions. • Pro tip: Make sure you still register your event handler (

ctx.room.on("participant_attributes_changed", handler)

) within

entrypoint

after connecting to the room. This is actually the approach used in all the official examples – it helps ensure your handlers have everything they need. Just manage those dependencies thoughtfully, and you'll be golden! 😊 Sources: telephony/sip_lifecycle.py | agent/main.py | server/main.py