Include symbol deats in feed init message from ib

Async spawn a deats getter task whenever we load a symbol data feed.
Pass these symbol details in the first message delivered by the feed at
open. Move stream loop into a new func.

piker/brokers/ib.py

@@ -426,12 +426,15 @@ class Client:
 
         """
         contract = await self.find_contract(symbol)
+
+        details_fute = self.ib.reqContractDetailsAsync(contract)
         ticker: Ticker = self.ib.reqMktData(
             contract,
             snapshot=True,
         )
         ticker = await ticker.updateEvent
-        return contract, ticker
+        details = (await details_fute)[0]
+        return contract, ticker, details
 
     # async to be consistent for the client proxy, and cuz why not.
     async def submit_limit(
@@ -440,7 +443,7 @@ class Client:
         symbol: str,
         price: float,
         action: str,
-        size: int = 100,
+        size: int,
     ) -> int:
         """Place an order and return integer request id provided by client.
 
@@ -870,6 +873,7 @@ async def stream_quotes(
     symbols: List[str],
     shm_token: Tuple[str, str, List[tuple]],
     loglevel: str = None,
+
     # compat for @tractor.msg.pub
     topics: Any = None,
     get_topics: Callable = None,
@@ -885,7 +889,8 @@ async def stream_quotes(
     # TODO: support multiple subscriptions
     sym = symbols[0]
 
-    contract, first_ticker = await _trio_run_client_method(
+    async with trio.open_nursery() as n:
+        contract, first_ticker, details = await _trio_run_client_method(
             method='get_quote',
             symbol=sym,
         )
@@ -896,8 +901,8 @@ async def stream_quotes(
         symbol=sym,
     )
 
-    async with aclosing(stream):
-
+    shm = None
+    async with trio.open_nursery() as ln:
         # check if a writer already is alive in a streaming task,
         # otherwise start one and mark it as now existing
 
@@ -908,7 +913,6 @@ async def stream_quotes(
         # maybe load historical ohlcv in to shared mem
         # check if shm has already been created by previous
         # feed initialization
-        async with trio.open_nursery() as ln:
         if not writer_already_exists:
             _local_buffer_writers[key] = True
 
@@ -945,9 +949,23 @@ async def stream_quotes(
             delay_s = times[-1] - times[times != times[-1]][-1]
             subscribe_ohlc_for_increment(shm, delay_s)
 
+        # pass back some symbol info like min_tick, trading_hours, etc.
+        # con = asdict(contract)
+        # syminfo = contract
+        symdeats = asdict(details)
+        symdeats.update(symdeats['contract'])
+
+        # TODO: for loop through all symbols passed in
+        init_msgs = {
             # pass back token, and bool, signalling if we're the writer
             # and that history has been written
-            await ctx.send_yield((shm_token, not writer_already_exists))
+            sym: {
+                'is_shm_writer': not writer_already_exists,
+                'shm_token': shm_token,
+                'symbol_info': symdeats,
+            }
+        }
+        await ctx.send_yield(init_msgs)
 
         # check for special contract types
         if type(first_ticker.contract) not in (ibis.Commodity, ibis.Forex):
@@ -988,6 +1006,7 @@ async def stream_quotes(
         # with trio.move_on_after(10) as cs:
         # wait for real volume on feed (trading might be closed)
 
+        async with aclosing(stream):
             async for ticker in stream:
 
                 # for a real volume contract we rait for the first
@@ -1009,9 +1028,34 @@ async def stream_quotes(
                     # ``aclosing()`` above?
                     break
 
-            # if cs.cancelled_caught:
-            #     await tractor.breakpoint()
+            # enter stream loop
+            try:
+                await stream_and_write(
+                    stream=stream,
+                    calc_price=calc_price,
+                    topic=topic,
+                    writer_already_exists=writer_already_exists,
+                    shm=shm,
+                    suffix=suffix,
+                    ctx=ctx,
+                )
+            finally:
+                if not writer_already_exists:
+                    _local_buffer_writers[key] = False
 
+
+async def stream_and_write(
+    stream,
+    calc_price: bool,
+    topic: str,
+    writer_already_exists: bool,
+    suffix: str,
+    ctx: tractor.Context,
+    shm: Optional['SharedArray'],  # noqa
+) -> None:
+    """Core quote streaming and shm writing loop; optimize for speed!
+
+    """
     # real-time stream
     async for ticker in stream:
 
@@ -1073,12 +1117,16 @@ async def stream_quotes(
         ticker.ticks = []
 
 
-@tractor.msg.pub
+@tractor.msg.pub(
+    send_on_connect={'local_trades': 'start'}
+)
 async def stream_trades(
     loglevel: str = None,
     get_topics: Callable = None,
 ) -> AsyncIterator[Dict[str, Any]]:
 
+    global _trades_stream_is_live
+
     # XXX: required to propagate ``tractor`` loglevel to piker logging
     get_console_log(loglevel or tractor.current_actor().loglevel)
 
@@ -1086,9 +1134,6 @@ async def stream_trades(
         method='recv_trade_updates',
     )
 
-    # startup msg
-    yield {'local_trades': 'start'}
-
     async for event_name, item in stream:
 
         # XXX: begin normalization of nonsense ib_insync internal