Update app.py

app.py

@@ -61,3 +61,15 @@ async def convert_currency(amount: float, from_currency: str, to_currency: str):
         return {"converted_amount": converted_amount}
     except KeyError:
         return {"error": "Invalid currency code"}
+
+@app.get("/supported-currencies")
+async def get_supported_currencies():
+    """Endpoint to return the list of supported currencies."""
+    rates = get_cached_rates()
+
+    if "error" in rates:
+        return {"error": "Failed to fetch exchange rates"}
+
+    # Extract the keys (currency codes) from the conversion_rates field
+    supported_currencies = list(rates["conversion_rates"].keys())
+    return {"currencies": supported_currencies}