Method UpgradeDescriptorCache

src/wallet/scriptpubkeyman.cpp:2340–2367

}

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");
    }
}

void DescriptorScriptPubKeyMan::UpdateWalletDescriptor(WalletDescriptor& descriptor)
{