stream_quotes now using FeedInit

piker/brokers/deribit/feed.py

@@ -34,7 +34,6 @@ from rapidfuzz import process as fuzzy
 import numpy as np
 import tractor
 
-from piker.accounting import MktPair
 from piker.accounting import (
     MktPair,
     unpack_fqme,
@@ -213,29 +212,19 @@ async def stream_quotes(
 
     sym = symbols[0]
 
-    #init_msgs: list[FeedInit] = []
+    init_msgs: list[FeedInit] = []
 
     async with (
         open_cached_client('deribit') as client,
         send_chan as send_chan
     ):
 
-        init_msgs = {
-            # pass back token, and bool, signalling if we're the writer
-            # and that history has been written
-            sym: {
-                'symbol_info': {
-                    'asset_type': 'option',
-                    'price_tick_size': 0.0005
-                },
-                'shm_write_opts': {
-                    'sum_tick_vml': True,
-                    'has_vlm': True
-                },
-                'fqsn': sym,
-            },
-        }
+        mkt, pair = await get_mkt_info(sym)
 
+        # build out init msgs according to latest spec
+        init_msgs.append(
+            FeedInit(mkt_info=mkt)
+        )
         nsym = piker_sym_to_cb_sym(sym.split('.')[0])
 
         async with maybe_open_price_feed(sym) as stream: