Update app.py

app.py

@@ -1,14 +1,18 @@
 import os
-
-from fastrtc import (ReplyOnPause, Stream, get_stt_model, get_tts_model)
+import httpx  # This was missing
+from fastrtc import ReplyOnPause, Stream, get_stt_model, get_tts_model
 from openai import OpenAI
 
+# Initialize Sambanova Client
 sambanova_client = OpenAI(
     api_key=os.getenv("key"), base_url="https://api.deepinfra.com/v1"
 )
+
+# Load STT and TTS models
 stt_model = get_stt_model()
 tts_model = get_tts_model()
 
+# Echo function to convert speech to text, then back to speech
 def echo(audio):
     prompt = stt_model.stt(audio)
     response = sambanova_client.chat.completions.create(
@@ -16,11 +20,12 @@ def echo(audio):
         messages=[{"role": "user", "content": prompt}],
         max_tokens=200,
     )
-    prompt = response.choices[0].message.content
-    for audio_chunk in tts_model.stream_tts_sync(prompt):
+    reply = response.choices[0].message.content
+    for audio_chunk in tts_model.stream_tts_sync(reply):
         yield audio_chunk
 
-
+# Dummy implementation of get_cloudflare_turn_credentials
+# You’ll need to replace this with real logic if it's not a stub
 def get_cloudflare_turn_credentials(
     turn_key_id=None,
     turn_key_api_token=None,
@@ -28,13 +33,20 @@ def get_cloudflare_turn_credentials(
     ttl=600,
     client: httpx.AsyncClient | None = None,
 ):
-
-
-Stream(
-    handler=...,
+    return {
+        "iceServers": [
+            {
+                "urls": ["stun:stun.l.google.com:19302"]
+            }
+        ]
+    }
+
+# Create and start the stream
+stream = Stream(
+    handler=echo,  # You had handler=... which is invalid
     rtc_configuration=get_cloudflare_turn_credentials,
     modality="audio",
     mode="send-receive"
 )
 
-stream.fastphone()
+stream.fastphone()