const EXCEPTION_DHT_BOOTSTRAP_NOT_ACCEPTED = 0x908;
const EXCEPTION_MULTIPLE_MESSAGE_SENT = 0x909;
const EXCEPTION_DHT_BOOTSTRAP_NOT_ATTEMPTED = 0x90a;
+ const EXCEPTION_INVALID_UNL = 0x90b;
// Message status codes
const MESSAGE_STATUS_CODE_OKAY = 'OKAY';