docs: def on_put(self, request, response, txn_id=None):
          """Responds to PUT request containing events."""
          response.body = "{}"
  
          # Check whether repeat txn_id
          if not self._is_new(txn_id):
              response.status = falcon.HTTP_200
              return
  
          request.context["body"] = request.stream.read()
          try:
              events = json.loads(request.context["body"].decode("utf-8"))["events"]
          except(KeyError, ValueError, UnicodeDecodeError):
              response.status = falcon.HTTP_400
              response.body = "Malformed request body"
              return
  
          if self.handler(EventStream(events, self.Api)):
              response.status = falcon.HTTP_200
          else:
              response.status = falcon.HTTP_400