code: def captcha_transmit(self, captcha, uuid):
          
  
          self.log('Transmitting captcha')
  
          response = {
              'component': 'hfos.enrol.enrolmanager',
              'action': 'captcha',
              'data': b64encode(captcha['image'].getvalue()).decode('utf-8')
          }
          self.fire(send(uuid, response))
docs: Delayed transmission of a requested captcha