public (bool ok, PublicKey keyChild, UInt256 ccChild) Derive(uint nChild, UInt256 cc)
{
(bool ok, PublicKey keyChild, UInt256 ccChild)invalid = (false, null, UInt256.Zero);
if (!IsValid || !IsCompressed || nChild >= HardenedBit)
{
return(invalid);
}
var vout = new byte[64];
Hashes.Bip32Hash(cc, nChild, Data[0], Data[1..], vout);
internal (bool ok, PrivateKey keyChild, UInt256 ccChild) Derive(uint nChild, UInt256 chainCode)
{
(bool, PrivateKey, UInt256)invalid = (false, null, UInt256.Zero);
if (!IsValid || !IsCompressed)
{
return(invalid);
}
var vout = new byte[64];
if (nChild < HardenedBit)
{
// Not hardened.
var pubkey = this.CreatePublicKey();
Debug.Assert(pubkey.Data.Length == PublicKey.CompressedLength);
Hashes.Bip32Hash(chainCode, nChild, pubkey.Data[0], pubkey.Data[1..], vout);
