commands: onchain_history: reuse daemon.fx if available

electrum/commands.py

@@ -773,8 +773,7 @@ class Commands:
             kwargs['to_timestamp'] = time.mktime(end_date.timetuple())
         if show_fiat:
             from .exchange_rate import FxThread
-            fx = FxThread(config=self.config)
-            kwargs['fx'] = fx
+            kwargs['fx'] = self.daemon.fx if self.daemon else FxThread(config=self.config)
 
         return json_normalize(wallet.get_detailed_history(**kwargs))