Add new event liquidation_feed_update to PublicChannelsHandler (and improve overall type hinting).

bfxapi/types/dataclasses.py

@@ -129,7 +129,7 @@ class Liquidation(_Type):
     base_price: float
     is_match: int
     is_market_sold: int
-    price_acquired: float
+    liquidation_price: float
 
 @dataclass
 class Leaderboard(_Type):

bfxapi/types/serializers.py

@@ -230,7 +230,7 @@ Liquidation = generate_labeler_serializer(
         "is_match",
         "is_market_sold",
         "_PLACEHOLDER",
-        "price_acquired"
+        "liquidation_price"
     ]
 )
 

bfxapi/websocket/enums.py

@@ -1,5 +1,5 @@
 #pylint: disable-next=wildcard-import,unused-wildcard-import
-from ..enums import *
+from bfxapi.enums import *
 
 class Channel(str, Enum):
     TICKER = "ticker"

bfxapi/websocket/handlers/auth_events_handler.py

@@ -1,5 +1,5 @@
 from typing import TYPE_CHECKING, \
-    Union, Dict, Tuple, Any
+    Dict, Tuple, Any
 
 from bfxapi.types import serializers
 
@@ -71,14 +71,16 @@ class AuthEventsHandler:
                 break
 
     def __notification(self, stream: Any) -> None:
-        _Types = Union[None, "Order", "FundingOffer"]
+        event: str = "notification"
 
-        event, serializer = "notification", _Notification[_Types](serializer=None)
+        serializer: _Notification = _Notification[None](serializer=None)
 
         if stream[1] == "on-req" or stream[1] == "ou-req" or stream[1] == "oc-req":
-            event, serializer = f"{stream[1]}-notification", _Notification[_Types](serializer=serializers.Order)
+            event, serializer = f"{stream[1]}-notification", \
+                _Notification["Order"](serializer=serializers.Order)
 
         if stream[1] == "fon-req" or stream[1] == "foc-req":
-            event, serializer = f"{stream[1]}-notification", _Notification[_Types](serializer=serializers.FundingOffer)
+            event, serializer = f"{stream[1]}-notification", \
+                _Notification["FundingOffer"](serializer=serializers.FundingOffer)
 
         self.__event_emitter.emit(event, serializer.parse(*stream))

bfxapi/websocket/handlers/public_channels_handler.py

@@ -24,7 +24,8 @@ class PublicChannelsHandler:
         "t_ticker_update", "f_ticker_update", "t_trade_execution", 
         "t_trade_execution_update", "f_trade_execution", "f_trade_execution_update", 
         "t_book_update", "f_book_update", "t_raw_book_update", 
-        "f_raw_book_update", "candles_update", "derivatives_status_update"
+        "f_raw_book_update", "candles_update", "derivatives_status_update",
+        "liquidation_feed_update"
     ]
 
     def __init__(self,
@@ -97,7 +98,7 @@ class PublicChannelsHandler:
                     for sub_stream in stream[0] ])
 
     def __book_channel_handler(self, subscription: "Book", stream: List[Any]) -> None:
-        t_or_f = subscription["symbol"][0]
+        symbol = subscription["symbol"]
 
         is_raw_book = subscription["prec"] == "R0"
 
@@ -106,17 +107,17 @@ class PublicChannelsHandler:
                 or serializers.TradingPairBook,
             "f": is_raw_book and serializers.FundingCurrencyRawBook \
                 or serializers.FundingCurrencyBook
-        }[t_or_f]
+        }[symbol[0]]
 
         if all(isinstance(sub_stream, list) for sub_stream in stream[0]):
-            event = t_or_f + "_" + \
+            event = symbol[0] + "_" + \
                 (is_raw_book and "raw_book" or "book") + "_snapshot"
 
             return self.__emit(event, subscription, \
                 [ serializer.parse(*sub_stream) \
                     for sub_stream in stream[0] ])
 
-        event = t_or_f + "_" + \
+        event = symbol[0] + "_" + \
             (is_raw_book and "raw_book" or "book") + "_update"
 
         return self.__emit(event, subscription, \
@@ -135,3 +136,7 @@ class PublicChannelsHandler:
         if subscription["key"].startswith("deriv:"):
             return self.__emit("derivatives_status_update", subscription, \
                 serializers.DerivativesStatus.parse(*stream[0]))
+
+        if subscription["key"].startswith("liq:"):
+            return self.__emit("liquidation_feed_update", subscription, \
+               serializers.Liquidation.parse(*stream[0][0]))