Method MigrateToDescriptor

src/wallet/scriptpubkeyman.cpp:534–824

}

std::optional<MigrationData> LegacyDataSPKM::MigrateToDescriptor()
{
    LOCK(cs_KeyStore);
    if (m_storage.IsLocked()) {
        return std::nullopt;
    }

    MigrationData out;

    std::unordered_set<CScript, SaltedSipHasher> spks{GetScriptPubKeys()};

    // Get all key ids
    std::set<CKeyID> keyids;
    for (const auto& key_pair : mapKeys) {
        keyids.insert(key_pair.first);
    }
    for (const auto& key_pair : mapCryptedKeys) {
        keyids.insert(key_pair.first);
    }

    // Get key metadata and figure out which keys don't have a seed
    // Note that we do not ignore the seeds themselves because they are considered IsMine!
    for (auto keyid_it = keyids.begin(); keyid_it != keyids.end();) {
        const CKeyID& keyid = *keyid_it;
        const auto& it = mapKeyMetadata.find(keyid);
        if (it != mapKeyMetadata.end()) {
            const CKeyMetadata& meta = it->second;
            if (meta.hdKeypath == "s" || meta.hdKeypath == "m") {
                keyid_it++;
                continue;
            }
            if (!meta.hd_seed_id.IsNull() && (m_hd_chain.seed_id == meta.hd_seed_id || m_inactive_hd_chains.contains(meta.hd_seed_id))) {
                keyid_it = keyids.erase(keyid_it);
                continue;
            }
        }
        keyid_it++;
    }

    WalletBatch batch(m_storage.GetDatabase());
    if (!batch.TxnBegin()) {
        LogWarning("Error generating descriptors for migration, cannot initialize db transaction");
        return std::nullopt;
    }

    // keyids is now all non-HD keys. Each key will have its own combo descriptor
    for (const CKeyID& keyid : keyids) {
        CKey key;
        if (!GetKey(keyid, key)) {
            assert(false);
        }

        // Get birthdate from key meta
        uint64_t creation_time = 0;
        const auto& it = mapKeyMetadata.find(keyid);
        if (it != mapKeyMetadata.end()) {
            creation_time = it->second.nCreateTime;
        }