/**
* create checksum to verify ownership of the master primary key
*
* @return string[] [address, signature]
*/
protected function createChecksumVerificationSignature()
{
$import = BIP32::import($this->primaryPrivateKey->key());
$public = $this->primaryPrivateKey->publicKey();
$address = BitcoinLib::public_key_to_address($public, $import['version']);
return [$address, BitcoinLib::signMessage($address, $import)];
}
