Fix FMV ws model and added example" (#566)

* Fix FMV ws model and add example

* Updated example with correct tickers

examples/websocket/fmv.py

@@ -0,0 +1,19 @@
+from polygon import WebSocketClient
+from polygon.websocket.models import WebSocketMessage, Feed, Market
+from typing import List
+
+client = WebSocketClient(feed=Feed.Business, market=Market.Stocks, verbose=True)
+
+# FMV
+client.subscribe("FMV.*")  # all ticker symbols
+# client.subscribe("FMV.TSLA")
+# client.subscribe("FMV.AAPL")
+# client.subscribe("FMV.NVDA")
+
+
+def handle_msg(msgs: List[WebSocketMessage]):
+    for m in msgs:
+        print(m)
+
+
+client.run(handle_msg)

polygon/websocket/models/__init__.py

@@ -35,6 +35,8 @@ def parse_single(data: Dict[str, Any]):
         return IndexValue.from_dict(data)
     elif event_type == EventType.LaunchpadValue.value:
         return LaunchpadValue.from_dict(data)
+    elif event_type == EventType.BusinessFairMarketValue.value:
+        return FairMarketValue.from_dict(data)
     return None
 
 

polygon/websocket/models/models.py

@@ -351,7 +351,7 @@ class FairMarketValue:
 
     @staticmethod
     def from_dict(d):
-        return LaunchpadValue(
+        return FairMarketValue(
             event_type=d.get("ev", None),
             fmv=d.get("fmv", None),
             ticker=d.get("sym", None),
@@ -375,6 +375,7 @@ def from_dict(d):
             Level2Book,
             IndexValue,
             LaunchpadValue,
+            FairMarketValue,
         ]
     ],
 )