ib: add back `src/dst` parsing for fiat pairs

piker/brokers/ib/api.py

@@ -650,12 +650,14 @@ class Client:
             exch in {'IDEALPRO'}
             or sectype == 'CASH'
         ):
-            # if '/' in symbol:
+            pair: str = symbol
-            #     currency = ''
+            if '/' in symbol:
-            #     symbol, currency = symbol.split('/')
+                src, dst = symbol.split('/')
+                pair: str = ''.join([src, dst])
+
             con = Forex(
-                pair=''.join((symbol, currency)),
+                pair=pair,
-                currency=currency,
+                currency='',
             )
             con.bars_kwargs = {'whatToShow': 'MIDPOINT'}
 

piker/brokers/ib/feed.py

@@ -30,6 +30,7 @@ import time
 from typing import (
     Any,
     Callable,
+    TYPE_CHECKING,
 )
 
 from async_generator import aclosing
@@ -65,6 +66,9 @@ from .api import (
 from ._util import data_reset_hack
 from .symbols import get_mkt_info
 
+if TYPE_CHECKING:
+    from trio._core._run import Task
+
 
 # XXX NOTE: See available types table docs:
 # https://interactivebrokers.github.io/tws-api/tick_types.html
@@ -308,7 +312,7 @@ async def wait_on_data_reset(
     return False
 
 
-_data_resetter_task: trio.Task | None = None
+_data_resetter_task: Task | None = None
 _failed_resets: int = 0
 
 
@@ -334,7 +338,15 @@ async def get_bars(
 
     task_status: TaskStatus[trio.CancelScope] = trio.TASK_STATUS_IGNORED,
 
-) -> (dict, np.ndarray):
+) -> tuple[
+    tuple[  # result tuple
+        ibis.objects.BarDataList,
+        np.ndarray,
+        datetime,
+        datetime,
+    ] | None,
+    bool,  # timed out hint
+]:
     '''
     Retrieve historical data from a ``trio``-side task using
     a ``MethoProxy``.
@@ -420,7 +432,12 @@ async def get_bars(
                 if data_cs:
                     data_cs.cancel()
 
-                result = (bars, bars_array, first_dt, last_dt)
+                result = (
+                    bars,  # ib native
+                    bars_array,  # numpy
+                    first_dt,
+                    last_dt,
+                )
 
                 # signal data reset loop parent task
                 result_ready.set()
@@ -428,7 +445,7 @@ async def get_bars(
                 return result
 
             except RequestError as err:
-                msg = err.message
+                msg: str = err.message
 
                 if 'No market data permissions for' in msg:
                     # TODO: signalling for no permissions searches
@@ -466,21 +483,29 @@ async def get_bars(
                     nodatas_count += 1
                     continue
 
-                elif 'API historical data query cancelled' in err.message:
+                elif (
+                    'API historical data query cancelled'
+                    in
+                    err.message
+                ):
                     log.warning(
                         'Query cancelled by IB (:eyeroll:):\n'
                         f'{err.message}'
                     )
                     continue
+
                 elif (
                     'Trading TWS session is connected from a different IP'
-                        in err.message
+                    in
+                    err.message
                 ):
                     log.warning("ignoring ip address warning")
                     continue
 
                 # XXX: more or less same as above timeout case
-                elif _pacing in msg:
+                elif (
+                    _pacing in msg
+                ):
                     log.warning(
                         'History throttle rate reached!\n'
                         'Resetting farms with `ctrl-alt-f` hack\n'
@@ -532,9 +557,10 @@ async def get_bars(
                 # don't double invoke the reset hack if another
                 # requester task already has it covered.
                 continue
+
             else:
                 _data_resetter_task = trio.lowlevel.current_task()
-                unset_resetter = True
+                unset_resetter: bool = True
 
             # spawn new data reset task
             data_cs, reset_done = await nurse.start(
@@ -547,9 +573,16 @@ async def get_bars(
             # sync wait on reset to complete
             await reset_done.wait()
 
-    _data_resetter_task = None if unset_resetter else _data_resetter_task
+    _data_resetter_task = (
+        None
+        if unset_resetter
+        else _data_resetter_task
+    )
     assert result
-    return result, data_cs is not None
+    return (
+        result,
+        data_cs is not None,
+    )
 
 
 _quote_streams: dict[str, trio.abc.ReceiveStream] = {}