Add full real-time position update support B)

There was one trick which was that it seems that binance will often send
the account/position update event over the user stream *before* the
actual clearing (aka FILLED) order update event, so make sure we put an
entry in the `dialogs: OrderDialogs` as soon as an order request comes
in such that even if the account update arrives first the
`BrokerdPosition` msg can be relayed without delay / order event order
considerations.

piker/brokers/binance/broker.py

@@ -174,11 +174,11 @@ async def handle_order_requests(
                     # TODO: figure out what special params we have to send?
                     # https://binance-docs.github.io/apidocs/futures/en/#modify-order-trade
 
-                # lookup the binance-native symbol
+                # track latest request state such that map
-                # bs_mktid: str = client._pairs[order.symbol.upper()].symbol
+                # lookups start at the most recent msg and then
+                # scan reverse-chronologically.
+                dialogs.add_msg(oid, msg)
 
-                # call our client api to submit the order
-                try:
                 # XXX: ACK the request **immediately** before sending
                 # the api side request to ensure the ems maps the oid ->
                 # reqid correctly!
@@ -189,6 +189,8 @@ async def handle_order_requests(
                 )
                 await ems_order_stream.send(resp)
 
+                # call our client api to submit the order
+                try:
                     reqid = await client.submit_limit(
                         symbol=order.symbol,
                         side=order.action,
@@ -201,11 +203,6 @@ async def handle_order_requests(
                     # assert reqid == order.oid
                     dids[order.oid] = reqid
 
-                    # track latest request state such that map
-                    # lookups start at the most recent msg and then
-                    # scan reverse-chronologically.
-                    dialogs.add_msg(oid, msg)
-
                 except BrokerError as be:
                     await ems_order_stream.send(
                         BrokerdError(
@@ -347,9 +344,9 @@ async def open_trade_dialog(
                         bs_mktid: str = entry['symbol']
                         entry_size: float = float(entry['positionAmt'])
 
-                        pair: Pair | None
+                        pair: Pair | None = client._venue2pairs[venue].get(bs_mktid)
                         if (
-                            pair := client._venue2pairs[venue].get(bs_mktid)
+                            pair
                             and entry_size > 0
                         ):
                             entry_price: float = float(entry['entryPrice'])
@@ -406,6 +403,8 @@ async def open_trade_dialog(
                 )
                 tn.start_soon(
                     handle_order_updates,
+                    venue,
+                    client,
                     ems_stream,
                     wss,
                     dialogs,
@@ -416,21 +415,12 @@ async def open_trade_dialog(
 
 
 async def handle_order_updates(
+    venue: str,
+    client: Client,
     ems_stream: tractor.MsgStream,
     wss: NoBsWs,
     dialogs: OrderDialogs,
 
-    # apiflows: dict[int, ChainMap[dict[str, dict]]],
-    # ids: bidict[str, int],
-    # reqids2txids: bidict[int, str],
-
-    # table: PpTable,
-    # ledger_trans: dict[str, Transaction],
-
-    # acctid: str,
-    # acc_name: str,
-    # token: str,
-
 ) -> None:
     '''
     Main msg handling loop for all things order management.
@@ -443,9 +433,6 @@ async def handle_order_updates(
         log.info(f'Rx USERSTREAM msg:\n{pformat(msg)}')
         match msg:
 
-            # TODO:
-            # POSITION update
-
             # ORDER update
             # spot: https://binance-docs.github.io/apidocs/spot/en/#payload-balance-update
             # futes: https://binance-docs.github.io/apidocs/futures/en/#event-order-update
@@ -488,7 +475,6 @@ async def handle_order_updates(
                 'e': 'ORDER_TRADE_UPDATE',
                 'T': int(epoch_ms),
                 'o': {
-                    'i': reqid,
                     's': bs_mktid,
 
                     # XXX NOTE XXX see special ids for market
@@ -499,6 +485,7 @@ async def handle_order_updates(
                     # // "settlement_autoclose-": settlement order
                     #     for delisting or delivery
                     'c': oid,
+                    # 'i': reqid,  # binance internal int id
 
                     # prices
                     'a': submit_price,
@@ -579,6 +566,8 @@ async def handle_order_updates(
                         status = 'canceled'
                         del dialogs._dialogs[oid]
 
+                    # case 'TRADE':
+
                     case _:
                         status = status.lower()
 
@@ -599,6 +588,52 @@ async def handle_order_updates(
                 )
                 await ems_stream.send(resp)
 
+            # ACCOUNT and POSITION update B)
+            # {
+            #  'E': 1687036749218,
+            #  'e': 'ACCOUNT_UPDATE'
+            #  'T': 1687036749215,
+            #  'a': {'B': [{'a': 'USDT',
+            #               'bc': '0',
+            #               'cw': '1267.48920735',
+            #               'wb': '1410.90245576'}],
+            #        'P': [{'cr': '-3292.10973007',
+            #               'ep': '26349.90000',
+            #               'iw': '143.41324841',
+            #               'ma': 'USDT',
+            #               'mt': 'isolated',
+            #               'pa': '0.038',
+            #               'ps': 'BOTH',
+            #               's': 'BTCUSDT',
+            #               'up': '5.17555453'}],
+            #        'm': 'ORDER'},
+            # }
+            case {
+                'T': int(epoch_ms),
+                'e': 'ACCOUNT_UPDATE',
+                'a': {
+                    'P': [{
+                        's': bs_mktid,
+                        'pa': pos_amount,
+                        'ep': entry_price,
+                    }],
+                },
+            }:
+                # real-time relay position updates back to EMS
+                pair: Pair | None = client._venue2pairs[venue].get(bs_mktid)
+                ppmsg = BrokerdPosition(
+                    broker='binance',
+                    account='binance.usdtm',
+
+                    # TODO: maybe we should be passing back
+                    # a `MktPair` here?
+                    symbol=pair.bs_fqme.lower() + '.binance',
+
+                    size=float(pos_amount),
+                    avg_price=float(entry_price),
+                )
+                await ems_stream.send(ppmsg)
+
             case _:
                 log.warning(
                     'Unhandled event:\n'