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wallet: Upgrade existing descriptor caches

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Add functions to upgrade existing descriptor caches to support the use
of last hardened xpub caching.
This commit is contained in:
Andrew Chow
2021-03-01 17:03:52 -05:00
parent 432ba9e543
commit 74fede3b8b
6 changed files with 62 additions and 0 deletions
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29
src/wallet/scriptpubkeyman.cpp
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@@ -2278,3 +2278,32 @@ bool DescriptorScriptPubKeyMan::GetDescriptorString(std::string& out, bool priv)
return m_wallet_descriptor.descriptor->ToNormalizedString(provider, out, priv);
}
void DescriptorScriptPubKeyMan::UpgradeDescriptorCache()
{
LOCK(cs_desc_man);
if (m_storage.IsLocked() || m_storage.IsWalletFlagSet(WALLET_FLAG_LAST_HARDENED_XPUB_CACHED)) {
return;
}
// Skip if we have the last hardened xpub cache
if (m_wallet_descriptor.cache.GetCachedLastHardenedExtPubKeys().size() > 0) {
return;
}
// Expand the descriptor
FlatSigningProvider provider;
provider.keys = GetKeys();
FlatSigningProvider out_keys;
std::vector<CScript> scripts_temp;
DescriptorCache temp_cache;
if (!m_wallet_descriptor.descriptor->Expand(0, provider, scripts_temp, out_keys, &temp_cache)){
throw std::runtime_error("Unable to expand descriptor");
}
// Cache the last hardened xpubs
DescriptorCache diff = m_wallet_descriptor.cache.MergeAndDiff(temp_cache);
if (!WalletBatch(m_storage.GetDatabase()).WriteDescriptorCacheItems(GetID(), diff)) {
throw std::runtime_error(std::string(__func__) + ": writing cache items failed");
}
}