add initial lnurl-pay

electrum/lnurl.py

@@ -52,12 +52,15 @@ async def _request_lnurl(url: str) -> dict:
     """Requests payment data from a lnurl."""
     try:
         response = await Network.async_send_http_on_proxy("get", url, timeout=10)
+        response = json.loads(response)
     except asyncio.TimeoutError as e:
         raise LNURLError("Server did not reply in time.") from e
     except aiohttp.client_exceptions.ClientError as e:
         raise LNURLError(f"Client error: {e}") from e
+    except json.JSONDecodeError:
+        raise LNURLError(f"Invalid response from server")
     # TODO: handling of specific client errors
-    response = json.loads(response)
+
     if "metadata" in response:
         response["metadata"] = json.loads(response["metadata"])
     status = response.get("status")