Add bfxapi/websocket/enums.py file. Rewrite bfxapi.websocket's __init__.py. Rename HEARTBEAT constant to _HEARTBEAT to make it internal.

bfxapi/websocket/enums.py

@@ -0,0 +1,25 @@
+from enum import Enum
+
+class Channels(str, Enum):
+    TICKER = "ticker"
+    TRADES = "trades"
+    BOOK = "book"
+    CANDLES = "candles"
+    STATUS = "status"
+
+class Errors(int, Enum):
+    ERR_UNK = 10000
+    ERR_GENERIC = 10001
+    ERR_CONCURRENCY = 10008
+    ERR_PARAMS = 10020
+    ERR_CONF_FAIL = 10050
+    ERR_AUTH_FAIL = 10100
+    ERR_AUTH_PAYLOAD = 10111
+    ERR_AUTH_SIG = 10112
+    ERR_AUTH_HMAC = 10113
+    ERR_AUTH_NONCE = 10114
+    ERR_UNAUTH_FAIL = 10200
+    ERR_SUB_FAIL = 10300
+    ERR_SUB_MULTI = 10301
+    ERR_UNSUB_FAIL = 10400
+    ERR_READY = 11000