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[Wallet] extend CKeyMetadata with HD keypath

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Zcash: modified for zip32
This commit is contained in:
Jonas Schnelli
2016-07-09 11:41:01 +02:00
committed by Eirik Ogilvie-Wigley
parent 9bcf90e2de
commit b6d1af89f2
2 changed files with 16 additions and 2 deletions
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5
src/wallet/wallet.cpp
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@@ -117,18 +117,21 @@ SaplingPaymentAddress CWallet::GenerateNewSaplingZKey()
throw std::runtime_error("CWallet::GenerateNewSaplingZKey(): HD seed not found");
auto m = libzcash::SaplingExtendedSpendingKey::Master(seed);
uint32_t bip44CoinType = Params().BIP44CoinType();
// We use a fixed keypath scheme of m/32'/coin_type'/account'
// Derive m/32'
auto m_32h = m.Derive(32 | ZIP32_HARDENED_KEY_LIMIT);
// Derive m/32'/coin_type'
auto m_32h_cth = m_32h.Derive(Params().BIP44CoinType() | ZIP32_HARDENED_KEY_LIMIT);
auto m_32h_cth = m_32h.Derive(bip44CoinType | ZIP32_HARDENED_KEY_LIMIT);
// Derive account key at next index, skip keys already known to the wallet
libzcash::SaplingExtendedSpendingKey xsk;
do
{
xsk = m_32h_cth.Derive(hdChain.saplingAccountCounter | ZIP32_HARDENED_KEY_LIMIT);
metadata.hdKeypath = "m/32'/" + std::to_string(bip44CoinType) + "'/" + std::to_string(hdChain.saplingAccountCounter) + "'";
metadata.seedFp = hdChain.seedFp;
// Increment childkey index
hdChain.saplingAccountCounter++;
} while (HaveSaplingSpendingKey(xsk.expsk.full_viewing_key()));