Add config to enable checksums in BfxWebSocketBucket.

bfxapi/websocket/_client/bfx_websocket_bucket.py

@@ -14,6 +14,8 @@ if TYPE_CHECKING:
     from websockets.client import WebSocketClientProtocol
     from pyee import EventEmitter
 
+_CHECKSUM_FLAG_VALUE = 131_072
+
 class BfxWebSocketBucket(Connection):
     VERSION = 2
 
@@ -45,6 +47,8 @@ class BfxWebSocketBucket(Connection):
 
             await self.__recover_state()
 
+            await self.__set_conf(flags=_CHECKSUM_FLAG_VALUE)
+
             async with self.__condition:
                 self.__condition.notify(1)
 
@@ -84,6 +88,10 @@ class BfxWebSocketBucket(Connection):
 
         self.__subscriptions.clear()
 
+    async def __set_conf(self, flags: int) -> None:
+        await self._websocket.send(json.dumps( \
+            { "event": "conf", "flags": flags }))
+
     @Connection.require_websocket_connection
     async def subscribe(self,
                         channel: str,