Add and implement new IncompleteCredentialError in bfxapi.client.

bfxapi/client.py

@@ -1,11 +1,18 @@
-from typing import List, Literal, Optional
+from typing import \
+    TYPE_CHECKING, TypedDict, List, Literal, Optional
 
 from bfxapi._utils.logger import ColorLogger
 
+from bfxapi.exceptions import IncompleteCredentialError
+
 from bfxapi.rest import BfxRestInterface
 from bfxapi.websocket import BfxWebSocketClient
 from bfxapi.urls import REST_HOST, WSS_HOST
 
+if TYPE_CHECKING:
+    _Credentials = TypedDict("_Credentials", \
+        { "api_key": str, "api_secret": str, "filters": Optional[List[str]] })
+
 class Client:
     def __init__(
             self,
@@ -15,16 +22,28 @@ class Client:
             rest_host: str = REST_HOST,
             wss_host: str = WSS_HOST,
             filters: Optional[List[str]] = None,
-            wss_timeout: Optional[float] = 60 * 15,
+            timeout: Optional[float] = 60 * 15,
             log_filename: Optional[str] = None,
             log_level: Literal["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"] = "INFO"
     ) -> None:
+        credentials: Optional["_Credentials"] = None
+
+        if api_key and api_secret:
+            credentials = \
+                { "api_key": api_key, "api_secret": api_secret, "filters": filters }
+        elif api_key:
+            raise IncompleteCredentialError( \
+                "You must provide both an API-KEY and an API-SECRET (missing API-KEY).")
+        elif api_secret:
+            raise IncompleteCredentialError( \
+                "You must provide both an API-KEY and an API-SECRET (missing API-SECRET).")
+
+        self.rest = BfxRestInterface(rest_host, api_key, api_secret)
+
         logger = ColorLogger("bfxapi", level=log_level)
 
         if log_filename:
             logger.register(filename=log_filename)
 
-        self.rest = BfxRestInterface(rest_host, api_key, api_secret)
-
-        self.wss = BfxWebSocketClient(wss_host, api_key, api_secret,
-            filters=filters, wss_timeout=wss_timeout, logger=logger)
+        self.wss = BfxWebSocketClient(wss_host, \
+            credentials=credentials, timeout=timeout, logger=logger)