Use anext() in kucoin stream_quotes

piker/brokers/kucoin.py

@@ -38,6 +38,7 @@ from uuid import uuid4
 import asks
 import tractor
 import trio
+from trio_util import trio_async_generator
 from trio_typing import TaskStatus
 from fuzzywuzzy import process as fuzzy
 import pendulum
@@ -454,7 +455,6 @@ async def stream_quotes(
                     'fqsn': sym,
                 },
             }
-
             @acm
             async def subscribe(ws: wsproto.WSConnection):
                 @acm
@@ -505,16 +505,19 @@ async def stream_quotes(
                             }
                         )
 
-            async with open_autorecon_ws(
+            async with (
+                open_autorecon_ws(
                     f'wss://ws-api-spot.kucoin.com/?token={token}&[connectId={connect_id}]',
                     fixture=subscribe,
-            ) as ws:
-                msg_gen = stream_messages(ws, sym)
-                typ, quote = await msg_gen.__anext__()
+                ) as ws,
+                stream_messages(ws, sym) as msg_gen,
+            ):
+                typ, quote = await anext(msg_gen)
 
                 while typ != 'trade':
                     # TODO: use ``anext()`` when it lands in 3.10!
-                    typ, quote = await msg_gen.__anext__()
+                    typ, quote = await anext(msg_gen)
+
 
                 task_status.started((init_msgs, quote))
                 feed_is_live.set()
@@ -543,7 +546,7 @@ def make_sub(sym, connect_id, level='l1') -> dict[str, str | bool] | None:
                 'response': True,
             }
 
-
+@trio_async_generator
 async def stream_messages(ws: NoBsWs, sym: str) -> AsyncGenerator[NoBsWs, dict]:
     timeouts = 0
     last_trade_ts = 0