const EXCEPTION_MULTIPLE_MESSAGE_SENT = 0x909;
const EXCEPTION_DHT_BOOTSTRAP_NOT_ATTEMPTED = 0x90a;
const EXCEPTION_INVALID_UNL = 0x90b;
+ const EXCEPTION_INVALID_PRIVATE_KEY_HASH = 0x90c;
// Message status codes
const MESSAGE_STATUS_CODE_OKAY = 'OKAY';