kraken: use new OrderDialogs type, handle .spot

Drop the older `dict[str, ChainMap]` prototype we had since the new
`OrderDialogs` built-out while adding `binance` order support is more
refined and general. Also, handle new and now expect `.spot` venue token
in FQMEs since kraken too has futes markets that we'll likely want to
support eventually.

piker/brokers/kraken/broker.py

@@ -18,7 +18,6 @@
 Order api and machinery
 
 '''
-from collections import ChainMap, defaultdict
 from contextlib import (
     asynccontextmanager as acm,
     aclosing,
@@ -52,6 +51,9 @@
 from piker.accounting._mktinfo import (
     MktPair,
 )
+from piker.clearing import(
+    OrderDialogs,
+)
 from piker.clearing._messages import (
     Order,
     Status,
@@ -124,7 +126,7 @@ async def handle_order_requests(
     client: Client,
     ems_order_stream: tractor.MsgStream,
     token: str,
-    apiflows: dict[int, ChainMap[dict[str, dict]]],
+    apiflows: OrderDialogs,
     ids: bidict[str, int],
     reqids2txids: dict[int, str],
 
@@ -188,6 +190,7 @@ async def handle_order_requests(
                     try:
                         txid: str = reqids2txids[reqid]
                     except KeyError:
+
                         # XXX: not sure if this block ever gets hit now?
                         log.error('TOO FAST EDIT')
                         reqids2txids[reqid] = TooFastEdit(reqid)
@@ -221,7 +224,11 @@ async def handle_order_requests(
                         'type': order.action,
                     }
 
-                    psym: str = order.symbol.upper()
+                    # XXX strip any .<venue> token which should
+                    # ONLY ever be '.spot' rn, until we support
+                    # futes.
+                    bs_fqme: str = order.symbol.rstrip('.spot')
+                    psym: str = bs_fqme.upper()
                     pair: str = f'{psym[:3]}/{psym[3:]}'
 
                 # XXX: ACK the request **immediately** before sending
@@ -260,7 +267,7 @@ async def handle_order_requests(
                 await ws.send_msg(req)
 
                 # placehold for sanity checking in relay loop
-                apiflows[reqid].maps.append(msg)
+                apiflows.add_msg(reqid, msg)
 
             case _:
                 account = msg.get('account')
@@ -440,10 +447,7 @@ async def open_trade_dialog(
         acc_name = 'kraken.' + acctid
 
         # task local msg dialog tracking
-        apiflows: defaultdict[
-            int,
-            ChainMap[dict[str, dict]],
-        ] = defaultdict(ChainMap)
+        apiflows = OrderDialogs()
 
         # 2way map for ems ids to kraken int reqids..
         ids: bidict[str, int] = bidict()
@@ -706,7 +710,7 @@ async def handle_order_updates(
     ws: NoBsWs,
     ws_stream: AsyncIterator,
     ems_stream: tractor.MsgStream,
-    apiflows: dict[int, ChainMap[dict[str, dict]]],
+    apiflows: OrderDialogs,
     ids: bidict[str, int],
     reqids2txids: bidict[int, str],
     table: PpTable,
@@ -921,7 +925,7 @@ async def handle_order_updates(
                                 ),
                                 src='kraken',
                             )
-                            apiflows[reqid].maps.append(status_msg.to_dict())
+                            apiflows.add_msg(reqid, status_msg.to_dict())
                             await ems_stream.send(status_msg)
                             continue
 
@@ -1057,7 +1061,7 @@ async def handle_order_updates(
                                 ),
                             )
 
-                            apiflows[reqid].maps.append(update_msg)
+                            apiflows.add_msg(reqid, update_msg)
                             await ems_stream.send(resp)
 
                         # fill msg.
@@ -1136,9 +1140,8 @@ async def handle_order_updates(
                     )
                     continue
 
-                # update the msg chain
-                chain = apiflows[reqid]
-                chain.maps.append(event)
+                # update the msg history
+                apiflows.add_msg(reqid, event)
 
                 if status == 'error':
                     # any of ``{'add', 'edit', 'cancel'}``
@@ -1148,11 +1151,16 @@ async def handle_order_updates(
                         f'Failed to {action} order {reqid}:\n'
                         f'{errmsg}'
                     )
+
+                    symbol: str = 'N/A'
+                    if chain := apiflows.get(reqid):
+                        symbol: str = chain.get('symbol', 'N/A')
+
                     await ems_stream.send(BrokerdError(
                         oid=oid,
                         # XXX: use old reqid in case it changed?
                         reqid=reqid,
-                        symbol=chain.get('symbol', 'N/A'),
+                        symbol=symbol,
 
                         reason=f'Failed {action}:\n{errmsg}',
                         broker_details=event