docs: def record_message(self, msg, from_rewarder):
          """Record a message to our rewards.demo file if it is has been opened"""
          if self.file:
              # Include an authoritative timestamp (because the `sent_at` from the server is likely to be different
              timestamped_message = {
                  'timestamp': time.time(),
                  'message': json.loads(msg),
                  'from_rewarder': from_rewarder,
              }
              self.file.write(json.dumps(timestamped_message))
              self.file.write('\n')
              self.file.flush()