added the bones for the handle_order_requests func

piker/brokers/kraken.py

@@ -40,7 +40,10 @@ from ._util import resproc, SymbolNotFound, BrokerError
 from ..log import get_logger, get_console_log
 from ..data import ShmArray
 from ..data._web_bs import open_autorecon_ws
-from ..clearing._messages import BrokerdPosition, BrokerdOrder, BrokerdStatus
+from ..clearing._messages import (
+    BrokerdPosition, BrokerdOrder, BrokerdStatus,
+    BrokerdOrderAck, BrokerdError, BrokerdCancel, BrokerdFill
+)
 
 import urllib.parse
 import hashlib
@@ -433,6 +436,74 @@ def normalize_symbol(
         return ticker.lower()
 
 
+async def handle_order_requests(
+
+        client: #kraken,
+        ems_order_stream: tractor.MsgStream,
+
+) -> None:
+
+    # order_request: dict
+    async for request_msg in ems_order_stream:
+        log.info(f'Received order request {request_msg}')
+
+        action = request_msg['action']
+
+        if action in {'buy', 'sell'}:
+
+            account = request_msg['account']
+            if account != 'kraken.spot':
+                log.error(
+                    'This is a kraken account, \
+                    only a `kraken.spot` selection is valid'
+                )
+                await ems_order_stream.send(BrokerError(
+                    oid=request_msg['oid']
+                    symbol=request_msg['symbol']
+                    reason=f'Kraken only, No account found: `{account}` ?',
+                ).dict())
+                continue
+
+            # validate
+            order = BrokerdOrder(**request_msg)
+
+            # call our client api to submit the order
+            ## TODO: look into the submit_limit method, do it write my own?
+            reqid = await client.submit_limit(
+
+                oid=order.oid,
+                symbol=order.symbol,
+                price=order.price,
+                action=order.action,
+                size=order.size,
+                ## XXX: how do I handle new orders
+                reqid=order.reqid,
+            )
+
+            # deliver ack that order has been submitted to broker routing
+            await ems_order_stream.send(
+                BrokerdOrderAck(
+
+                    # ems order request id
+                    oid=order.oid,
+
+                    # broker specific request id
+                    reqid=reqid,
+
+                ).dict()
+            )
+
+        elif action == 'cancel':
+             msg = BrokerdCancel(**request_msg)
+
+             await client.submit_cancel(
+                reqid=msg.reqid
+            )
+
+        else:
+            log.error(f'Unknown order command: {request_msg}')
+
+
 @tractor.context
 async def trades_dialogue(
     ctx: tractor.Context,
@@ -464,7 +535,8 @@ async def trades_dialogue(
 
        # async with (
        #     ctx.open_stream() as ems_stream,
-   #         
+       #     trio.open_nursery as n,
+       # ):
 
 
 async def stream_messages(ws):