HD Key

The CryptoHDKey class represents hierarchical deterministic key information.

This is an instruction provided by the UKey Wallet hardware, which includes the extended public key information.

Inputs

Field	Value Type	Meaning
isMaster	boolean	Whether it is a master key
isPrivateKey	boolean	Whether it is a private key
key	Buffer	The key data
chainCode	Buffer	The chain code
useInfo	CryptoCoinInfo	Usage information
origin	CryptoKeypath	The origin path
children	CryptoKeypath	The children path
parentFingerprint	Buffer	The parent fingerprint
name	string	The name (optional)
note	string	The note (optional)

Note Values

• 'account.standard' – BIP44 Standard account
• 'account.ledger_live' – Ledger Live account
• 'account.ledger_legacy' – Ledger Legacy account

UR Demo

UR:CRYPTO-HDKEY/PDAXHDCLAOZTRDKBTKFPRFKBCWVEWYBGDPNTCPVLEOENJSWMBKFTLTRESNWTNLTLMKJYVYMWBSAAHDCXCSBNNLLNBZIAJZTPKPPKJOSTCEZSJEKGYKJOCSKNHFTPSWTIGHVABDIEGTBWWLTEAHTAADEHOYADCSFNAMTAADDYOYADLNCSDWYKCSFNYKAEYKATTAADDYOYADLRAEWKLAWKAYAEASINFPIAIAJLKPJTJYCXEHBKKOGHISINJKCXINJKCXHSC

Decode Demo

import { URDecoder } from "@ngraveio/bc-ur";
import { CryptoHDKey } from "@keystonehq/bc-ur-registry";

const dec = new URDecoder();
// Feed each scanned frame string into the decoder
// feed each scanned frame into dec.receivePart(frame)

if (dec.isComplete()) {
  const ur = dec.resultUR(); // the decoded UR should be of type 'crypto-hdkey'
  const hdkey = CryptoHDKey.fromCBOR(ur.cbor);

  const name = hdkey.getName();
  const note = hdkey.getNote();
  const chainCode = hdkey.getChainCode();
  const origin = hdkey.getOrigin();
  const xfp = origin?.getSourceFingerprint();
}