fix: improve binance service

solarathon/pages/dashboard.py

@@ -29,7 +29,7 @@
 # root.setLevel(logging.DEBUG)
 
 # some app state that outlives a single page
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, ValidationError
 
 
 init_app_state = solara.reactive(["ada", "btc","bnb", "eth","doge", "xrp"])
@@ -73,9 +73,22 @@ def format_price(price):
 
 def get_binance_ticket(symbol: str) -> TickerData:
     binance_url = f"https://api.binance.com/api/v3/ticker/24hr?symbol={symbol}"
-    return TickerData.model_validate_json(
-        json_data=requests.get(binance_url).content
-    )
+    response = requests.get(binance_url)
+
+    try:
+        response.raise_for_status()
+        data = response.json()
+
+        # Ensure that all required fields are present in the data
+        if all(key in data for key in ('lastPrice', 'priceChangePercent', 'highPrice', 'lowPrice')):
+            ticker_data = TickerData(**data)
+            return ticker_data
+        else:
+            return TickerData(symbol="No data", last_price=0.0, price_change_percent=0.0, high_price=0.0, low_price=0.0)
+    except requests.exceptions.RequestException as e:
+        print("Request Exception:", e)
+    except ValidationError as ve:
+        print("Validation Error:", ve)
 
 
 @solara.component