code: func ValidateTaskENI(acsenis []*ecsacs.ElasticNetworkInterface) error {
  	// Only one eni should be associated with the task
  	// Only one ipv4 should be associated with the eni
  	// No more than one ipv6 should be associated with the eni
  	if len(acsenis) != 1 {
  		return errors.Errorf("eni message validation: more than one ENIs in the message(%d)", len(acsenis))
  	} else if len(acsenis[0].Ipv4Addresses) != 1 {
  		return errors.Errorf("eni message validation: more than one ipv4 addresses in the message(%d)", len(acsenis[0].Ipv4Addresses))
  	} else if len(acsenis[0].Ipv6Addresses) > 1 {
  		return errors.Errorf("eni message validation: more than one ipv6 addresses in the message(%d)", len(acsenis[0].Ipv6Addresses))
  	}
  
  	if acsenis[0].MacAddress == nil {
  		return errors.Errorf("eni message validation: empty eni mac address in the message")
  	}
  
  	if acsenis[0].Ec2Id == nil {
  		return errors.Errorf("eni message validation: empty eni id in the message")
  	}
  
  	return nil
  }
docs: // ValidateTaskENI validates the eni informaiton sent from acs