diff --git a/src/wallet/scriptpubkeyman.cpp b/src/wallet/scriptpubkeyman.cpp
index 9a11dd483..ee0257c8a 100644
--- a/src/wallet/scriptpubkeyman.cpp
+++ b/src/wallet/scriptpubkeyman.cpp
@@ -1,1736 +1,1800 @@
 // Copyright (c) 2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <chainparams.h>
 #include <config.h>
 #include <key_io.h>
 #include <outputtype.h>
 #include <script/descriptor.h>
 #include <script/sign.h>
 #include <util/bip32.h>
 #include <util/strencodings.h>
 #include <util/translation.h>
 #include <wallet/scriptpubkeyman.h>
 
 bool LegacyScriptPubKeyMan::GetNewDestination(const OutputType type,
                                               CTxDestination &dest,
                                               std::string &error) {
     LOCK(cs_KeyStore);
     error.clear();
 
     // Generate a new key that is added to wallet
     CPubKey new_key;
     if (!GetKeyFromPool(new_key, type)) {
         error = "Error: Keypool ran out, please call keypoolrefill first";
         return false;
     }
     LearnRelatedScripts(new_key, type);
     dest = GetDestinationForKey(new_key, type);
     return true;
 }
 
 typedef std::vector<uint8_t> valtype;
 
 namespace {
 
 /**
  * This is an enum that tracks the execution context of a script, similar to
  * SigVersion in script/interpreter. It is separate however because we want to
  * distinguish between top-level scriptPubKey execution and P2SH redeemScript
  * execution (a distinction that has no impact on consensus rules).
  */
 enum class IsMineSigVersion {
     TOP = 0,  //! scriptPubKey execution
     P2SH = 1, //! P2SH redeemScript
 };
 
 /**
  * This is an internal representation of isminetype + invalidity.
  * Its order is significant, as we return the max of all explored
  * possibilities.
  */
 enum class IsMineResult {
     NO = 0,         //! Not ours
     WATCH_ONLY = 1, //! Included in watch-only balance
     SPENDABLE = 2,  //! Included in all balances
     INVALID = 3,    //! Not spendable by anyone (P2SH inside P2SH)
 };
 
 bool HaveKeys(const std::vector<valtype> &pubkeys,
               const LegacyScriptPubKeyMan &keystore) {
     for (const valtype &pubkey : pubkeys) {
         CKeyID keyID = CPubKey(pubkey).GetID();
         if (!keystore.HaveKey(keyID)) {
             return false;
         }
     }
     return true;
 }
 
 IsMineResult IsMineInner(const LegacyScriptPubKeyMan &keystore,
                          const CScript &scriptPubKey,
                          IsMineSigVersion sigversion) {
     IsMineResult ret = IsMineResult::NO;
 
     std::vector<valtype> vSolutions;
     txnouttype whichType = Solver(scriptPubKey, vSolutions);
 
     CKeyID keyID;
     switch (whichType) {
         case TX_NONSTANDARD:
         case TX_NULL_DATA:
             break;
         case TX_PUBKEY:
             keyID = CPubKey(vSolutions[0]).GetID();
             if (keystore.HaveKey(keyID)) {
                 ret = std::max(ret, IsMineResult::SPENDABLE);
             }
             break;
         case TX_PUBKEYHASH:
             keyID = CKeyID(uint160(vSolutions[0]));
             if (keystore.HaveKey(keyID)) {
                 ret = std::max(ret, IsMineResult::SPENDABLE);
             }
             break;
         case TX_SCRIPTHASH: {
             if (sigversion != IsMineSigVersion::TOP) {
                 // P2SH inside P2SH is invalid.
                 return IsMineResult::INVALID;
             }
             CScriptID scriptID = CScriptID(uint160(vSolutions[0]));
             CScript subscript;
             if (keystore.GetCScript(scriptID, subscript)) {
                 ret = std::max(ret, IsMineInner(keystore, subscript,
                                                 IsMineSigVersion::P2SH));
             }
             break;
         }
         case TX_MULTISIG: {
             // Never treat bare multisig outputs as ours (they can still be made
             // watchonly-though)
             if (sigversion == IsMineSigVersion::TOP) {
                 break;
             }
 
             // Only consider transactions "mine" if we own ALL the keys
             // involved. Multi-signature transactions that are partially owned
             // (somebody else has a key that can spend them) enable
             // spend-out-from-under-you attacks, especially in shared-wallet
             // situations.
             std::vector<valtype> keys(vSolutions.begin() + 1,
                                       vSolutions.begin() + vSolutions.size() -
                                           1);
             if (HaveKeys(keys, keystore)) {
                 ret = std::max(ret, IsMineResult::SPENDABLE);
             }
             break;
         }
     }
 
     if (ret == IsMineResult::NO && keystore.HaveWatchOnly(scriptPubKey)) {
         ret = std::max(ret, IsMineResult::WATCH_ONLY);
     }
     return ret;
 }
 
 } // namespace
 
 isminetype LegacyScriptPubKeyMan::IsMine(const CScript &script) const {
     switch (IsMineInner(*this, script, IsMineSigVersion::TOP)) {
         case IsMineResult::INVALID:
         case IsMineResult::NO:
             return ISMINE_NO;
         case IsMineResult::WATCH_ONLY:
             return ISMINE_WATCH_ONLY;
         case IsMineResult::SPENDABLE:
             return ISMINE_SPENDABLE;
     }
     assert(false);
 }
 
 bool LegacyScriptPubKeyMan::CheckDecryptionKey(
     const CKeyingMaterial &master_key, bool accept_no_keys) {
     {
         LOCK(cs_KeyStore);
         assert(mapKeys.empty());
 
         // Always pass when there are no encrypted keys
         bool keyPass = mapCryptedKeys.empty();
         bool keyFail = false;
         CryptedKeyMap::const_iterator mi = mapCryptedKeys.begin();
         for (; mi != mapCryptedKeys.end(); ++mi) {
             const CPubKey &vchPubKey = (*mi).second.first;
             const std::vector<uint8_t> &vchCryptedSecret = (*mi).second.second;
             CKey key;
             if (!DecryptKey(master_key, vchCryptedSecret, vchPubKey, key)) {
                 keyFail = true;
                 break;
             }
             keyPass = true;
             if (fDecryptionThoroughlyChecked) {
                 break;
             }
         }
         if (keyPass && keyFail) {
             LogPrintf("The wallet is probably corrupted: Some keys decrypt but "
                       "not all.\n");
             throw std::runtime_error(
                 "Error unlocking wallet: some keys decrypt but not all. Your "
                 "wallet file may be corrupt.");
         }
         if (keyFail || (!keyPass && !accept_no_keys)) {
             return false;
         }
         fDecryptionThoroughlyChecked = true;
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::Encrypt(const CKeyingMaterial &master_key,
                                     WalletBatch *batch) {
     LOCK(cs_KeyStore);
     encrypted_batch = batch;
     if (!mapCryptedKeys.empty()) {
         encrypted_batch = nullptr;
         return false;
     }
 
     KeyMap keys_to_encrypt;
     // Clear mapKeys so AddCryptedKeyInner will succeed.
     keys_to_encrypt.swap(mapKeys);
     for (const KeyMap::value_type &mKey : keys_to_encrypt) {
         const CKey &key = mKey.second;
         CPubKey vchPubKey = key.GetPubKey();
         CKeyingMaterial vchSecret(key.begin(), key.end());
         std::vector<uint8_t> vchCryptedSecret;
         if (!EncryptSecret(master_key, vchSecret, vchPubKey.GetHash(),
                            vchCryptedSecret)) {
             encrypted_batch = nullptr;
             return false;
         }
         if (!AddCryptedKey(vchPubKey, vchCryptedSecret)) {
             encrypted_batch = nullptr;
             return false;
         }
     }
     encrypted_batch = nullptr;
     return true;
 }
 
 bool LegacyScriptPubKeyMan::GetReservedDestination(const OutputType type,
                                                    bool internal,
                                                    CTxDestination &address,
                                                    int64_t &index,
                                                    CKeyPool &keypool) {
     LOCK(cs_KeyStore);
     if (!CanGetAddresses(internal)) {
         return false;
     }
 
     if (!ReserveKeyFromKeyPool(index, keypool, internal)) {
         return false;
     }
     address = GetDestinationForKey(keypool.vchPubKey, type);
     return true;
 }
 
 void LegacyScriptPubKeyMan::MarkUnusedAddresses(const CScript &script) {
     LOCK(cs_KeyStore);
     // extract addresses and check if they match with an unused keypool key
     for (const auto &keyid : GetAffectedKeys(script, *this)) {
         std::map<CKeyID, int64_t>::const_iterator mi =
             m_pool_key_to_index.find(keyid);
         if (mi != m_pool_key_to_index.end()) {
             WalletLogPrintf("%s: Detected a used keypool key, mark all keypool "
                             "key up to this key as used\n",
                             __func__);
             MarkReserveKeysAsUsed(mi->second);
 
             if (!TopUp()) {
                 WalletLogPrintf(
                     "%s: Topping up keypool failed (locked wallet)\n",
                     __func__);
             }
         }
     }
 }
 
 void LegacyScriptPubKeyMan::UpgradeKeyMetadata() {
     LOCK(cs_KeyStore);
     if (m_storage.IsLocked() ||
         m_storage.IsWalletFlagSet(WALLET_FLAG_KEY_ORIGIN_METADATA)) {
         return;
     }
 
     auto batch = std::make_unique<WalletBatch>(m_storage.GetDatabase());
     for (auto &meta_pair : mapKeyMetadata) {
         CKeyMetadata &meta = meta_pair.second;
         // If the hdKeypath is "s", that's the seed and it doesn't have a key
         // origin
         if (!meta.hd_seed_id.IsNull() && !meta.has_key_origin &&
             meta.hdKeypath != "s") {
             CKey key;
             GetKey(meta.hd_seed_id, key);
             CExtKey masterKey;
             masterKey.SetSeed(key.begin(), key.size());
             // Add to map
             CKeyID master_id = masterKey.key.GetPubKey().GetID();
             std::copy(master_id.begin(), master_id.begin() + 4,
                       meta.key_origin.fingerprint);
             if (!ParseHDKeypath(meta.hdKeypath, meta.key_origin.path)) {
                 throw std::runtime_error("Invalid stored hdKeypath");
             }
             meta.has_key_origin = true;
             if (meta.nVersion < CKeyMetadata::VERSION_WITH_KEY_ORIGIN) {
                 meta.nVersion = CKeyMetadata::VERSION_WITH_KEY_ORIGIN;
             }
 
             // Write meta to wallet
             CPubKey pubkey;
             if (GetPubKey(meta_pair.first, pubkey)) {
                 batch->WriteKeyMetadata(meta, pubkey, true);
             }
         }
     }
 }
 
 bool LegacyScriptPubKeyMan::SetupGeneration(bool force) {
     if ((CanGenerateKeys() && !force) || m_storage.IsLocked()) {
         return false;
     }
 
     SetHDSeed(GenerateNewSeed());
     if (!NewKeyPool()) {
         return false;
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::IsHDEnabled() const {
     return !hdChain.seed_id.IsNull();
 }
 
 bool LegacyScriptPubKeyMan::CanGetAddresses(bool internal) const {
     LOCK(cs_KeyStore);
     // Check if the keypool has keys
     bool keypool_has_keys;
     if (internal && m_storage.CanSupportFeature(FEATURE_HD_SPLIT)) {
         keypool_has_keys = setInternalKeyPool.size() > 0;
     } else {
         keypool_has_keys = KeypoolCountExternalKeys() > 0;
     }
     // If the keypool doesn't have keys, check if we can generate them
     if (!keypool_has_keys) {
         return CanGenerateKeys();
     }
     return keypool_has_keys;
 }
 
 bool LegacyScriptPubKeyMan::Upgrade(int prev_version, bilingual_str &error) {
     LOCK(cs_KeyStore);
     bool hd_upgrade = false;
     bool split_upgrade = false;
     if (m_storage.CanSupportFeature(FEATURE_HD) && !IsHDEnabled()) {
         WalletLogPrintf("Upgrading wallet to HD\n");
         m_storage.SetMinVersion(FEATURE_HD);
 
         // generate a new master key
         CPubKey masterPubKey = GenerateNewSeed();
         SetHDSeed(masterPubKey);
         hd_upgrade = true;
     }
     // Upgrade to HD chain split if necessary
     if (m_storage.CanSupportFeature(FEATURE_HD_SPLIT) &&
         CHDChain::VERSION_HD_CHAIN_SPLIT) {
         WalletLogPrintf("Upgrading wallet to use HD chain split\n");
         m_storage.SetMinVersion(FEATURE_PRE_SPLIT_KEYPOOL);
         split_upgrade = FEATURE_HD_SPLIT > prev_version;
     }
     // Mark all keys currently in the keypool as pre-split
     if (split_upgrade) {
         MarkPreSplitKeys();
     }
     // Regenerate the keypool if upgraded to HD
     if (hd_upgrade) {
         if (!TopUp()) {
             error = _("Unable to generate keys");
             return false;
         }
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::HavePrivateKeys() const {
     LOCK(cs_KeyStore);
     return !mapKeys.empty() || !mapCryptedKeys.empty();
 }
 
 void LegacyScriptPubKeyMan::RewriteDB() {
     LOCK(cs_KeyStore);
     setInternalKeyPool.clear();
     setExternalKeyPool.clear();
     m_pool_key_to_index.clear();
     // Note: can't top-up keypool here, because wallet is locked.
     // User will be prompted to unlock wallet the next operation
     // that requires a new key.
 }
 
 static int64_t GetOldestKeyTimeInPool(const std::set<int64_t> &setKeyPool,
                                       WalletBatch &batch) {
     if (setKeyPool.empty()) {
         return GetTime();
     }
 
     CKeyPool keypool;
     int64_t nIndex = *(setKeyPool.begin());
     if (!batch.ReadPool(nIndex, keypool)) {
         throw std::runtime_error(std::string(__func__) +
                                  ": read oldest key in keypool failed");
     }
 
     assert(keypool.vchPubKey.IsValid());
     return keypool.nTime;
 }
 
 int64_t LegacyScriptPubKeyMan::GetOldestKeyPoolTime() const {
     LOCK(cs_KeyStore);
 
     WalletBatch batch(m_storage.GetDatabase());
 
     // load oldest key from keypool, get time and return
     int64_t oldestKey = GetOldestKeyTimeInPool(setExternalKeyPool, batch);
     if (IsHDEnabled() && m_storage.CanSupportFeature(FEATURE_HD_SPLIT)) {
         oldestKey = std::max(GetOldestKeyTimeInPool(setInternalKeyPool, batch),
                              oldestKey);
         if (!set_pre_split_keypool.empty()) {
             oldestKey =
                 std::max(GetOldestKeyTimeInPool(set_pre_split_keypool, batch),
                          oldestKey);
         }
     }
 
     return oldestKey;
 }
 
 size_t LegacyScriptPubKeyMan::KeypoolCountExternalKeys() const {
     LOCK(cs_KeyStore);
     return setExternalKeyPool.size() + set_pre_split_keypool.size();
 }
 
 unsigned int LegacyScriptPubKeyMan::GetKeyPoolSize() const {
     LOCK(cs_KeyStore);
     return setInternalKeyPool.size() + setExternalKeyPool.size() +
            set_pre_split_keypool.size();
 }
 
 int64_t LegacyScriptPubKeyMan::GetTimeFirstKey() const {
     LOCK(cs_KeyStore);
     return nTimeFirstKey;
 }
 
 std::unique_ptr<SigningProvider>
 LegacyScriptPubKeyMan::GetSolvingProvider(const CScript &script) const {
     return std::make_unique<LegacySigningProvider>(*this);
 }
 
 bool LegacyScriptPubKeyMan::CanProvide(const CScript &script,
                                        SignatureData &sigdata) {
     if (IsMine(script) != ISMINE_NO) {
         // If it IsMine, we can always provide in some way
         return true;
     }
     if (HaveCScript(CScriptID(script))) {
         // We can still provide some stuff if we have the script, but IsMine
         // failed because we don't have keys
         return true;
     }
     // If, given the stuff in sigdata, we could make a valid sigature, then
     // we can provide for this script
     ProduceSignature(*this, DUMMY_SIGNATURE_CREATOR, script, sigdata);
     if (!sigdata.signatures.empty()) {
         // If we could make signatures, make sure we have a private key to
         // actually make a signature
         bool has_privkeys = false;
         for (const auto &key_sig_pair : sigdata.signatures) {
             has_privkeys |= HaveKey(key_sig_pair.first);
         }
         return has_privkeys;
     }
     return false;
 }
 
 bool LegacyScriptPubKeyMan::SignTransaction(
     CMutableTransaction &tx, const std::map<COutPoint, Coin> &coins,
     SigHashType sighash, std::map<int, std::string> &input_errors) const {
     return ::SignTransaction(tx, this, coins, sighash, input_errors);
 }
 
 SigningResult LegacyScriptPubKeyMan::SignMessage(const std::string &message,
                                                  const PKHash &pkhash,
                                                  std::string &str_sig) const {
     CKeyID key_id(pkhash);
     CKey key;
     if (!GetKey(key_id, key)) {
         return SigningResult::PRIVATE_KEY_NOT_AVAILABLE;
     }
 
     if (MessageSign(key, message, str_sig)) {
         return SigningResult::OK;
     }
     return SigningResult::SIGNING_FAILED;
 }
 
 TransactionError
 LegacyScriptPubKeyMan::FillPSBT(PartiallySignedTransaction &psbtx,
                                 SigHashType sighash_type, bool sign,
                                 bool bip32derivs) const {
     for (size_t i = 0; i < psbtx.tx->vin.size(); ++i) {
         PSBTInput &input = psbtx.inputs.at(i);
 
         if (PSBTInputSigned(input)) {
             continue;
         }
 
         // Verify input looks sane. This will check that we have at most one
         // uxto, witness or non-witness.
         if (!input.IsSane()) {
             return TransactionError::INVALID_PSBT;
         }
 
         // Get the Sighash type
         if (sign && input.sighash_type.getRawSigHashType() > 0 &&
             input.sighash_type != sighash_type) {
             return TransactionError::SIGHASH_MISMATCH;
         }
 
         if (input.utxo.IsNull()) {
             // There's no UTXO so we can just skip this now
             continue;
         }
         SignatureData sigdata;
         input.FillSignatureData(sigdata);
         SignPSBTInput(HidingSigningProvider(this, !sign, !bip32derivs), psbtx,
                       i, sighash_type);
     }
 
     // Fill in the bip32 keypaths and redeemscripts for the outputs so that
     // hardware wallets can identify change
     for (size_t i = 0; i < psbtx.tx->vout.size(); ++i) {
         UpdatePSBTOutput(HidingSigningProvider(this, true, !bip32derivs), psbtx,
                          i);
     }
 
     return TransactionError::OK;
 }
 
 const CKeyMetadata *
 LegacyScriptPubKeyMan::GetMetadata(const CTxDestination &dest) const {
     LOCK(cs_KeyStore);
 
     CKeyID key_id = GetKeyForDestination(*this, dest);
     if (!key_id.IsNull()) {
         auto it = mapKeyMetadata.find(key_id);
         if (it != mapKeyMetadata.end()) {
             return &it->second;
         }
     }
 
     CScript scriptPubKey = GetScriptForDestination(dest);
     auto it = m_script_metadata.find(CScriptID(scriptPubKey));
     if (it != m_script_metadata.end()) {
         return &it->second;
     }
 
     return nullptr;
 }
 
 uint256 LegacyScriptPubKeyMan::GetID() const {
     return UINT256_ONE();
 }
 
 /**
  * Update wallet first key creation time. This should be called whenever keys
  * are added to the wallet, with the oldest key creation time.
  */
 void LegacyScriptPubKeyMan::UpdateTimeFirstKey(int64_t nCreateTime) {
     AssertLockHeld(cs_KeyStore);
     if (nCreateTime <= 1) {
         // Cannot determine birthday information, so set the wallet birthday to
         // the beginning of time.
         nTimeFirstKey = 1;
     } else if (!nTimeFirstKey || nCreateTime < nTimeFirstKey) {
         nTimeFirstKey = nCreateTime;
     }
 }
 
 bool LegacyScriptPubKeyMan::LoadKey(const CKey &key, const CPubKey &pubkey) {
     return AddKeyPubKeyInner(key, pubkey);
 }
 
 bool LegacyScriptPubKeyMan::AddKeyPubKey(const CKey &secret,
                                          const CPubKey &pubkey) {
     LOCK(cs_KeyStore);
     WalletBatch batch(m_storage.GetDatabase());
     return LegacyScriptPubKeyMan::AddKeyPubKeyWithDB(batch, secret, pubkey);
 }
 
 bool LegacyScriptPubKeyMan::AddKeyPubKeyWithDB(WalletBatch &batch,
                                                const CKey &secret,
                                                const CPubKey &pubkey) {
     AssertLockHeld(cs_KeyStore);
 
     // Make sure we aren't adding private keys to private key disabled wallets
     assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));
 
     // FillableSigningProvider has no concept of wallet databases, but calls
     // AddCryptedKey which is overridden below. To avoid flushes, the database
     // handle is tunneled through to it.
     bool needsDB = !encrypted_batch;
     if (needsDB) {
         encrypted_batch = &batch;
     }
     if (!AddKeyPubKeyInner(secret, pubkey)) {
         if (needsDB) {
             encrypted_batch = nullptr;
         }
         return false;
     }
 
     if (needsDB) {
         encrypted_batch = nullptr;
     }
 
     // Check if we need to remove from watch-only.
     CScript script;
     script = GetScriptForDestination(PKHash(pubkey));
     if (HaveWatchOnly(script)) {
         RemoveWatchOnly(script);
     }
 
     script = GetScriptForRawPubKey(pubkey);
     if (HaveWatchOnly(script)) {
         RemoveWatchOnly(script);
     }
 
     if (!m_storage.HasEncryptionKeys()) {
         return batch.WriteKey(pubkey, secret.GetPrivKey(),
                               mapKeyMetadata[pubkey.GetID()]);
     }
     m_storage.UnsetBlankWalletFlag(batch);
     return true;
 }
 
 bool LegacyScriptPubKeyMan::LoadCScript(const CScript &redeemScript) {
     /**
      * A sanity check was added in pull #3843 to avoid adding redeemScripts that
      * never can be redeemed. However, old wallets may still contain these. Do
      * not add them to the wallet and warn.
      */
     if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE) {
         std::string strAddr =
             EncodeDestination(ScriptHash(redeemScript), GetConfig());
         WalletLogPrintf("%s: Warning: This wallet contains a redeemScript "
                         "of size %i which exceeds maximum size %i thus can "
                         "never be redeemed. Do not use address %s.\n",
                         __func__, redeemScript.size(), MAX_SCRIPT_ELEMENT_SIZE,
                         strAddr);
         return true;
     }
 
     return FillableSigningProvider::AddCScript(redeemScript);
 }
 
 void LegacyScriptPubKeyMan::LoadKeyMetadata(const CKeyID &keyID,
                                             const CKeyMetadata &meta) {
     LOCK(cs_KeyStore);
     UpdateTimeFirstKey(meta.nCreateTime);
     mapKeyMetadata[keyID] = meta;
 }
 
 void LegacyScriptPubKeyMan::LoadScriptMetadata(const CScriptID &script_id,
                                                const CKeyMetadata &meta) {
     LOCK(cs_KeyStore);
     UpdateTimeFirstKey(meta.nCreateTime);
     m_script_metadata[script_id] = meta;
 }
 
 bool LegacyScriptPubKeyMan::AddKeyPubKeyInner(const CKey &key,
                                               const CPubKey &pubkey) {
     LOCK(cs_KeyStore);
     if (!m_storage.HasEncryptionKeys()) {
         return FillableSigningProvider::AddKeyPubKey(key, pubkey);
     }
 
     if (m_storage.IsLocked()) {
         return false;
     }
 
     std::vector<uint8_t> vchCryptedSecret;
     CKeyingMaterial vchSecret(key.begin(), key.end());
     if (!EncryptSecret(m_storage.GetEncryptionKey(), vchSecret,
                        pubkey.GetHash(), vchCryptedSecret)) {
         return false;
     }
 
     if (!AddCryptedKey(pubkey, vchCryptedSecret)) {
         return false;
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::LoadCryptedKey(
     const CPubKey &vchPubKey, const std::vector<uint8_t> &vchCryptedSecret) {
     return AddCryptedKeyInner(vchPubKey, vchCryptedSecret);
 }
 
 bool LegacyScriptPubKeyMan::AddCryptedKeyInner(
     const CPubKey &vchPubKey, const std::vector<uint8_t> &vchCryptedSecret) {
     LOCK(cs_KeyStore);
     assert(mapKeys.empty());
 
     mapCryptedKeys[vchPubKey.GetID()] = make_pair(vchPubKey, vchCryptedSecret);
     return true;
 }
 
 bool LegacyScriptPubKeyMan::AddCryptedKey(
     const CPubKey &vchPubKey, const std::vector<uint8_t> &vchCryptedSecret) {
     if (!AddCryptedKeyInner(vchPubKey, vchCryptedSecret)) {
         return false;
     }
 
     LOCK(cs_KeyStore);
     if (encrypted_batch) {
         return encrypted_batch->WriteCryptedKey(
             vchPubKey, vchCryptedSecret, mapKeyMetadata[vchPubKey.GetID()]);
     }
 
     return WalletBatch(m_storage.GetDatabase())
         .WriteCryptedKey(vchPubKey, vchCryptedSecret,
                          mapKeyMetadata[vchPubKey.GetID()]);
 }
 
 bool LegacyScriptPubKeyMan::HaveWatchOnly(const CScript &dest) const {
     LOCK(cs_KeyStore);
     return setWatchOnly.count(dest) > 0;
 }
 
 bool LegacyScriptPubKeyMan::HaveWatchOnly() const {
     LOCK(cs_KeyStore);
     return (!setWatchOnly.empty());
 }
 
 static bool ExtractPubKey(const CScript &dest, CPubKey &pubKeyOut) {
     std::vector<std::vector<uint8_t>> solutions;
     return Solver(dest, solutions) == TX_PUBKEY &&
            (pubKeyOut = CPubKey(solutions[0])).IsFullyValid();
 }
 
 bool LegacyScriptPubKeyMan::RemoveWatchOnly(const CScript &dest) {
     {
         LOCK(cs_KeyStore);
         setWatchOnly.erase(dest);
         CPubKey pubKey;
         if (ExtractPubKey(dest, pubKey)) {
             mapWatchKeys.erase(pubKey.GetID());
         }
     }
 
     if (!HaveWatchOnly()) {
         NotifyWatchonlyChanged(false);
     }
 
     return WalletBatch(m_storage.GetDatabase()).EraseWatchOnly(dest);
 }
 
 bool LegacyScriptPubKeyMan::LoadWatchOnly(const CScript &dest) {
     return AddWatchOnlyInMem(dest);
 }
 
 bool LegacyScriptPubKeyMan::AddWatchOnlyInMem(const CScript &dest) {
     LOCK(cs_KeyStore);
     setWatchOnly.insert(dest);
     CPubKey pubKey;
     if (ExtractPubKey(dest, pubKey)) {
         mapWatchKeys[pubKey.GetID()] = pubKey;
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::AddWatchOnlyWithDB(WalletBatch &batch,
                                                const CScript &dest) {
     if (!AddWatchOnlyInMem(dest)) {
         return false;
     }
 
     const CKeyMetadata &meta = m_script_metadata[CScriptID(dest)];
     UpdateTimeFirstKey(meta.nCreateTime);
     NotifyWatchonlyChanged(true);
     if (batch.WriteWatchOnly(dest, meta)) {
         m_storage.UnsetBlankWalletFlag(batch);
         return true;
     }
     return false;
 }
 
 bool LegacyScriptPubKeyMan::AddWatchOnlyWithDB(WalletBatch &batch,
                                                const CScript &dest,
                                                int64_t create_time) {
     m_script_metadata[CScriptID(dest)].nCreateTime = create_time;
     return AddWatchOnlyWithDB(batch, dest);
 }
 
 bool LegacyScriptPubKeyMan::AddWatchOnly(const CScript &dest) {
     WalletBatch batch(m_storage.GetDatabase());
     return AddWatchOnlyWithDB(batch, dest);
 }
 
 bool LegacyScriptPubKeyMan::AddWatchOnly(const CScript &dest,
                                          int64_t nCreateTime) {
     m_script_metadata[CScriptID(dest)].nCreateTime = nCreateTime;
     return AddWatchOnly(dest);
 }
 
 void LegacyScriptPubKeyMan::SetHDChain(const CHDChain &chain, bool memonly) {
     LOCK(cs_KeyStore);
     if (!memonly && !WalletBatch(m_storage.GetDatabase()).WriteHDChain(chain)) {
         throw std::runtime_error(std::string(__func__) +
                                  ": writing chain failed");
     }
 
     hdChain = chain;
 }
 
 bool LegacyScriptPubKeyMan::HaveKey(const CKeyID &address) const {
     LOCK(cs_KeyStore);
     if (!m_storage.HasEncryptionKeys()) {
         return FillableSigningProvider::HaveKey(address);
     }
     return mapCryptedKeys.count(address) > 0;
 }
 
 bool LegacyScriptPubKeyMan::GetKey(const CKeyID &address, CKey &keyOut) const {
     LOCK(cs_KeyStore);
     if (!m_storage.HasEncryptionKeys()) {
         return FillableSigningProvider::GetKey(address, keyOut);
     }
 
     CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
     if (mi != mapCryptedKeys.end()) {
         const CPubKey &vchPubKey = (*mi).second.first;
         const std::vector<uint8_t> &vchCryptedSecret = (*mi).second.second;
         return DecryptKey(m_storage.GetEncryptionKey(), vchCryptedSecret,
                           vchPubKey, keyOut);
     }
     return false;
 }
 
 bool LegacyScriptPubKeyMan::GetKeyOrigin(const CKeyID &keyID,
                                          KeyOriginInfo &info) const {
     CKeyMetadata meta;
     {
         LOCK(cs_KeyStore);
         auto it = mapKeyMetadata.find(keyID);
         if (it != mapKeyMetadata.end()) {
             meta = it->second;
         }
     }
     if (meta.has_key_origin) {
         std::copy(meta.key_origin.fingerprint, meta.key_origin.fingerprint + 4,
                   info.fingerprint);
         info.path = meta.key_origin.path;
     } else {
         // Single pubkeys get the master fingerprint of themselves
         std::copy(keyID.begin(), keyID.begin() + 4, info.fingerprint);
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::GetWatchPubKey(const CKeyID &address,
                                            CPubKey &pubkey_out) const {
     LOCK(cs_KeyStore);
     WatchKeyMap::const_iterator it = mapWatchKeys.find(address);
     if (it != mapWatchKeys.end()) {
         pubkey_out = it->second;
         return true;
     }
     return false;
 }
 
 bool LegacyScriptPubKeyMan::GetPubKey(const CKeyID &address,
                                       CPubKey &vchPubKeyOut) const {
     LOCK(cs_KeyStore);
     if (!m_storage.HasEncryptionKeys()) {
         if (!FillableSigningProvider::GetPubKey(address, vchPubKeyOut)) {
             return GetWatchPubKey(address, vchPubKeyOut);
         }
         return true;
     }
 
     CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
     if (mi != mapCryptedKeys.end()) {
         vchPubKeyOut = (*mi).second.first;
         return true;
     }
 
     // Check for watch-only pubkeys
     return GetWatchPubKey(address, vchPubKeyOut);
 }
 
 CPubKey LegacyScriptPubKeyMan::GenerateNewKey(WalletBatch &batch,
                                               bool internal) {
     assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));
     assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_BLANK_WALLET));
     AssertLockHeld(cs_KeyStore);
     // default to compressed public keys if we want 0.6.0 wallets
     bool fCompressed = m_storage.CanSupportFeature(FEATURE_COMPRPUBKEY);
 
     CKey secret;
 
     // Create new metadata
     int64_t nCreationTime = GetTime();
     CKeyMetadata metadata(nCreationTime);
 
     // use HD key derivation if HD was enabled during wallet creation and a seed
     // is present
     if (IsHDEnabled()) {
         DeriveNewChildKey(
             batch, metadata, secret,
             (m_storage.CanSupportFeature(FEATURE_HD_SPLIT) ? internal : false));
     } else {
         secret.MakeNewKey(fCompressed);
     }
 
     // Compressed public keys were introduced in version 0.6.0
     if (fCompressed) {
         m_storage.SetMinVersion(FEATURE_COMPRPUBKEY);
     }
 
     CPubKey pubkey = secret.GetPubKey();
     assert(secret.VerifyPubKey(pubkey));
 
     mapKeyMetadata[pubkey.GetID()] = metadata;
     UpdateTimeFirstKey(nCreationTime);
 
     if (!AddKeyPubKeyWithDB(batch, secret, pubkey)) {
         throw std::runtime_error(std::string(__func__) + ": AddKey failed");
     }
 
     return pubkey;
 }
 
 const uint32_t BIP32_HARDENED_KEY_LIMIT = 0x80000000;
 
 void LegacyScriptPubKeyMan::DeriveNewChildKey(WalletBatch &batch,
                                               CKeyMetadata &metadata,
                                               CKey &secret, bool internal) {
     // for now we use a fixed keypath scheme of m/0'/0'/k
     // seed (256bit)
     CKey seed;
     // hd master key
     CExtKey masterKey;
     // key at m/0'
     CExtKey accountKey;
     // key at m/0'/0' (external) or m/0'/1' (internal)
     CExtKey chainChildKey;
     // key at m/0'/0'/<n>'
     CExtKey childKey;
 
     // try to get the seed
     if (!GetKey(hdChain.seed_id, seed)) {
         throw std::runtime_error(std::string(__func__) + ": seed not found");
     }
 
     masterKey.SetSeed(seed.begin(), seed.size());
 
     // derive m/0'
     // use hardened derivation (child keys >= 0x80000000 are hardened after
     // bip32)
     masterKey.Derive(accountKey, BIP32_HARDENED_KEY_LIMIT);
 
     // derive m/0'/0' (external chain) OR m/0'/1' (internal chain)
     assert(internal ? m_storage.CanSupportFeature(FEATURE_HD_SPLIT) : true);
     accountKey.Derive(chainChildKey,
                       BIP32_HARDENED_KEY_LIMIT + (internal ? 1 : 0));
 
     // derive child key at next index, skip keys already known to the wallet
     do {
         // always derive hardened keys
         // childIndex | BIP32_HARDENED_KEY_LIMIT = derive childIndex in hardened
         // child-index-range
         // example: 1 | BIP32_HARDENED_KEY_LIMIT == 0x80000001 == 2147483649
         if (internal) {
             chainChildKey.Derive(childKey, hdChain.nInternalChainCounter |
                                                BIP32_HARDENED_KEY_LIMIT);
             metadata.hdKeypath = "m/0'/1'/" +
                                  std::to_string(hdChain.nInternalChainCounter) +
                                  "'";
             metadata.key_origin.path.push_back(0 | BIP32_HARDENED_KEY_LIMIT);
             metadata.key_origin.path.push_back(1 | BIP32_HARDENED_KEY_LIMIT);
             metadata.key_origin.path.push_back(hdChain.nInternalChainCounter |
                                                BIP32_HARDENED_KEY_LIMIT);
             hdChain.nInternalChainCounter++;
         } else {
             chainChildKey.Derive(childKey, hdChain.nExternalChainCounter |
                                                BIP32_HARDENED_KEY_LIMIT);
             metadata.hdKeypath = "m/0'/0'/" +
                                  std::to_string(hdChain.nExternalChainCounter) +
                                  "'";
             metadata.key_origin.path.push_back(0 | BIP32_HARDENED_KEY_LIMIT);
             metadata.key_origin.path.push_back(0 | BIP32_HARDENED_KEY_LIMIT);
             metadata.key_origin.path.push_back(hdChain.nExternalChainCounter |
                                                BIP32_HARDENED_KEY_LIMIT);
             hdChain.nExternalChainCounter++;
         }
     } while (HaveKey(childKey.key.GetPubKey().GetID()));
     secret = childKey.key;
     metadata.hd_seed_id = hdChain.seed_id;
     CKeyID master_id = masterKey.key.GetPubKey().GetID();
     std::copy(master_id.begin(), master_id.begin() + 4,
               metadata.key_origin.fingerprint);
     metadata.has_key_origin = true;
     // update the chain model in the database
     if (!batch.WriteHDChain(hdChain)) {
         throw std::runtime_error(std::string(__func__) +
                                  ": Writing HD chain model failed");
     }
 }
 
 void LegacyScriptPubKeyMan::LoadKeyPool(int64_t nIndex,
                                         const CKeyPool &keypool) {
     LOCK(cs_KeyStore);
     if (keypool.m_pre_split) {
         set_pre_split_keypool.insert(nIndex);
     } else if (keypool.fInternal) {
         setInternalKeyPool.insert(nIndex);
     } else {
         setExternalKeyPool.insert(nIndex);
     }
     m_max_keypool_index = std::max(m_max_keypool_index, nIndex);
     m_pool_key_to_index[keypool.vchPubKey.GetID()] = nIndex;
 
     // If no metadata exists yet, create a default with the pool key's
     // creation time. Note that this may be overwritten by actually
     // stored metadata for that key later, which is fine.
     CKeyID keyid = keypool.vchPubKey.GetID();
     if (mapKeyMetadata.count(keyid) == 0) {
         mapKeyMetadata[keyid] = CKeyMetadata(keypool.nTime);
     }
 }
 
 bool LegacyScriptPubKeyMan::CanGenerateKeys() const {
     // A wallet can generate keys if it has an HD seed (IsHDEnabled) or it is a
     // non-HD wallet (pre FEATURE_HD)
     LOCK(cs_KeyStore);
     return IsHDEnabled() || !m_storage.CanSupportFeature(FEATURE_HD);
 }
 
 CPubKey LegacyScriptPubKeyMan::GenerateNewSeed() {
     assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));
     CKey key;
     key.MakeNewKey(true);
     return DeriveNewSeed(key);
 }
 
 CPubKey LegacyScriptPubKeyMan::DeriveNewSeed(const CKey &key) {
     int64_t nCreationTime = GetTime();
     CKeyMetadata metadata(nCreationTime);
 
     // Calculate the seed
     CPubKey seed = key.GetPubKey();
     assert(key.VerifyPubKey(seed));
 
     // Set the hd keypath to "s" -> Seed, refers the seed to itself
     metadata.hdKeypath = "s";
     metadata.has_key_origin = false;
     metadata.hd_seed_id = seed.GetID();
 
     LOCK(cs_KeyStore);
 
     // mem store the metadata
     mapKeyMetadata[seed.GetID()] = metadata;
 
     // Write the key&metadata to the database
     if (!AddKeyPubKey(key, seed)) {
         throw std::runtime_error(std::string(__func__) +
                                  ": AddKeyPubKey failed");
     }
 
     return seed;
 }
 
 void LegacyScriptPubKeyMan::SetHDSeed(const CPubKey &seed) {
     LOCK(cs_KeyStore);
 
     // Store the keyid (hash160) together with the child index counter in the
     // database as a hdchain object.
     CHDChain newHdChain;
     newHdChain.nVersion = m_storage.CanSupportFeature(FEATURE_HD_SPLIT)
                               ? CHDChain::VERSION_HD_CHAIN_SPLIT
                               : CHDChain::VERSION_HD_BASE;
     newHdChain.seed_id = seed.GetID();
     SetHDChain(newHdChain, false);
     NotifyCanGetAddressesChanged();
     WalletBatch batch(m_storage.GetDatabase());
     m_storage.UnsetBlankWalletFlag(batch);
 }
 
 /**
  * Mark old keypool keys as used, and generate all new keys.
  */
 bool LegacyScriptPubKeyMan::NewKeyPool() {
     if (m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
         return false;
     }
     LOCK(cs_KeyStore);
     WalletBatch batch(m_storage.GetDatabase());
 
     for (const int64_t nIndex : setInternalKeyPool) {
         batch.ErasePool(nIndex);
     }
     setInternalKeyPool.clear();
 
     for (const int64_t nIndex : setExternalKeyPool) {
         batch.ErasePool(nIndex);
     }
     setExternalKeyPool.clear();
 
     for (int64_t nIndex : set_pre_split_keypool) {
         batch.ErasePool(nIndex);
     }
     set_pre_split_keypool.clear();
 
     m_pool_key_to_index.clear();
 
     if (!TopUp()) {
         return false;
     }
 
     WalletLogPrintf("LegacyScriptPubKeyMan::NewKeyPool rewrote keypool\n");
     return true;
 }
 
 bool LegacyScriptPubKeyMan::TopUp(unsigned int kpSize) {
     if (!CanGenerateKeys()) {
         return false;
     }
     {
         LOCK(cs_KeyStore);
 
         if (m_storage.IsLocked()) {
             return false;
         }
 
         // Top up key pool
         unsigned int nTargetSize;
         if (kpSize > 0) {
             nTargetSize = kpSize;
         } else {
             nTargetSize = std::max<int64_t>(
                 gArgs.GetArg("-keypool", DEFAULT_KEYPOOL_SIZE), 0);
         }
 
         // count amount of available keys (internal, external)
         // make sure the keypool of external and internal keys fits the user
         // selected target (-keypool)
         int64_t missingExternal = std::max<int64_t>(
             std::max<int64_t>(nTargetSize, 1) - setExternalKeyPool.size(), 0);
         int64_t missingInternal = std::max<int64_t>(
             std::max<int64_t>(nTargetSize, 1) - setInternalKeyPool.size(), 0);
 
         if (!IsHDEnabled() || !m_storage.CanSupportFeature(FEATURE_HD_SPLIT)) {
             // don't create extra internal keys
             missingInternal = 0;
         }
         bool internal = false;
         WalletBatch batch(m_storage.GetDatabase());
         for (int64_t i = missingInternal + missingExternal; i--;) {
             if (i < missingInternal) {
                 internal = true;
             }
 
             CPubKey pubkey(GenerateNewKey(batch, internal));
             AddKeypoolPubkeyWithDB(pubkey, internal, batch);
         }
         if (missingInternal + missingExternal > 0) {
             WalletLogPrintf(
                 "keypool added %d keys (%d internal), size=%u (%u internal)\n",
                 missingInternal + missingExternal, missingInternal,
                 setInternalKeyPool.size() + setExternalKeyPool.size() +
                     set_pre_split_keypool.size(),
                 setInternalKeyPool.size());
         }
     }
     NotifyCanGetAddressesChanged();
     return true;
 }
 
 void LegacyScriptPubKeyMan::AddKeypoolPubkeyWithDB(const CPubKey &pubkey,
                                                    const bool internal,
                                                    WalletBatch &batch) {
     LOCK(cs_KeyStore);
     // How in the hell did you use so many keys?
     assert(m_max_keypool_index < std::numeric_limits<int64_t>::max());
     int64_t index = ++m_max_keypool_index;
     if (!batch.WritePool(index, CKeyPool(pubkey, internal))) {
         throw std::runtime_error(std::string(__func__) +
                                  ": writing imported pubkey failed");
     }
     if (internal) {
         setInternalKeyPool.insert(index);
     } else {
         setExternalKeyPool.insert(index);
     }
     m_pool_key_to_index[pubkey.GetID()] = index;
 }
 
 void LegacyScriptPubKeyMan::KeepDestination(int64_t nIndex,
                                             const OutputType &type) {
     // Remove from key pool.
     WalletBatch batch(m_storage.GetDatabase());
     batch.ErasePool(nIndex);
     CPubKey pubkey;
     bool have_pk = GetPubKey(m_index_to_reserved_key.at(nIndex), pubkey);
     assert(have_pk);
     LearnRelatedScripts(pubkey, type);
     m_index_to_reserved_key.erase(nIndex);
     WalletLogPrintf("keypool keep %d\n", nIndex);
 }
 
 void LegacyScriptPubKeyMan::ReturnDestination(int64_t nIndex, bool fInternal,
                                               const CTxDestination &) {
     // Return to key pool
     {
         LOCK(cs_KeyStore);
         if (fInternal) {
             setInternalKeyPool.insert(nIndex);
         } else if (!set_pre_split_keypool.empty()) {
             set_pre_split_keypool.insert(nIndex);
         } else {
             setExternalKeyPool.insert(nIndex);
         }
         CKeyID &pubkey_id = m_index_to_reserved_key.at(nIndex);
         m_pool_key_to_index[pubkey_id] = nIndex;
         m_index_to_reserved_key.erase(nIndex);
         NotifyCanGetAddressesChanged();
     }
 
     WalletLogPrintf("keypool return %d\n", nIndex);
 }
 
 bool LegacyScriptPubKeyMan::GetKeyFromPool(CPubKey &result,
                                            const OutputType type,
                                            bool internal) {
     if (!CanGetAddresses(internal)) {
         return false;
     }
 
     CKeyPool keypool;
     LOCK(cs_KeyStore);
     int64_t nIndex;
     if (!ReserveKeyFromKeyPool(nIndex, keypool, internal) &&
         !m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
         if (m_storage.IsLocked()) {
             return false;
         }
         WalletBatch batch(m_storage.GetDatabase());
         result = GenerateNewKey(batch, internal);
         return true;
     }
 
     KeepDestination(nIndex, type);
     result = keypool.vchPubKey;
 
     return true;
 }
 
 bool LegacyScriptPubKeyMan::ReserveKeyFromKeyPool(int64_t &nIndex,
                                                   CKeyPool &keypool,
                                                   bool fRequestedInternal) {
     nIndex = -1;
     keypool.vchPubKey = CPubKey();
     {
         LOCK(cs_KeyStore);
 
         bool fReturningInternal = fRequestedInternal;
         fReturningInternal &=
             (IsHDEnabled() && m_storage.CanSupportFeature(FEATURE_HD_SPLIT)) ||
             m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS);
         bool use_split_keypool = set_pre_split_keypool.empty();
         std::set<int64_t> &setKeyPool =
             use_split_keypool
                 ? (fReturningInternal ? setInternalKeyPool : setExternalKeyPool)
                 : set_pre_split_keypool;
 
         // Get the oldest key
         if (setKeyPool.empty()) {
             return false;
         }
 
         WalletBatch batch(m_storage.GetDatabase());
 
         auto it = setKeyPool.begin();
         nIndex = *it;
         setKeyPool.erase(it);
         if (!batch.ReadPool(nIndex, keypool)) {
             throw std::runtime_error(std::string(__func__) + ": read failed");
         }
         CPubKey pk;
         if (!GetPubKey(keypool.vchPubKey.GetID(), pk)) {
             throw std::runtime_error(std::string(__func__) +
                                      ": unknown key in key pool");
         }
         // If the key was pre-split keypool, we don't care about what type it is
         if (use_split_keypool && keypool.fInternal != fReturningInternal) {
             throw std::runtime_error(std::string(__func__) +
                                      ": keypool entry misclassified");
         }
         if (!keypool.vchPubKey.IsValid()) {
             throw std::runtime_error(std::string(__func__) +
                                      ": keypool entry invalid");
         }
 
         assert(m_index_to_reserved_key.count(nIndex) == 0);
         m_index_to_reserved_key[nIndex] = keypool.vchPubKey.GetID();
         m_pool_key_to_index.erase(keypool.vchPubKey.GetID());
         WalletLogPrintf("keypool reserve %d\n", nIndex);
     }
     NotifyCanGetAddressesChanged();
     return true;
 }
 
 void LegacyScriptPubKeyMan::LearnRelatedScripts(const CPubKey &key,
                                                 OutputType type) {
     // Nothing to do...
 }
 
 void LegacyScriptPubKeyMan::LearnAllRelatedScripts(const CPubKey &key) {
     // Nothing to do...
 }
 
 void LegacyScriptPubKeyMan::MarkReserveKeysAsUsed(int64_t keypool_id) {
     AssertLockHeld(cs_KeyStore);
     bool internal = setInternalKeyPool.count(keypool_id);
     if (!internal) {
         assert(setExternalKeyPool.count(keypool_id) ||
                set_pre_split_keypool.count(keypool_id));
     }
 
     std::set<int64_t> *setKeyPool =
         internal ? &setInternalKeyPool
                  : (set_pre_split_keypool.empty() ? &setExternalKeyPool
                                                   : &set_pre_split_keypool);
     auto it = setKeyPool->begin();
 
     WalletBatch batch(m_storage.GetDatabase());
     while (it != std::end(*setKeyPool)) {
         const int64_t &index = *(it);
         if (index > keypool_id) {
             // set*KeyPool is ordered
             break;
         }
 
         CKeyPool keypool;
         if (batch.ReadPool(index, keypool)) {
             // TODO: This should be unnecessary
             m_pool_key_to_index.erase(keypool.vchPubKey.GetID());
         }
         LearnAllRelatedScripts(keypool.vchPubKey);
         batch.ErasePool(index);
         WalletLogPrintf("keypool index %d removed\n", index);
         it = setKeyPool->erase(it);
     }
 }
 
 std::vector<CKeyID> GetAffectedKeys(const CScript &spk,
                                     const SigningProvider &provider) {
     std::vector<CScript> dummy;
     FlatSigningProvider out;
     InferDescriptor(spk, provider)
         ->Expand(0, DUMMY_SIGNING_PROVIDER, dummy, out);
     std::vector<CKeyID> ret;
     for (const auto &entry : out.pubkeys) {
         ret.push_back(entry.first);
     }
     return ret;
 }
 
 void LegacyScriptPubKeyMan::MarkPreSplitKeys() {
     WalletBatch batch(m_storage.GetDatabase());
     for (auto it = setExternalKeyPool.begin();
          it != setExternalKeyPool.end();) {
         int64_t index = *it;
         CKeyPool keypool;
         if (!batch.ReadPool(index, keypool)) {
             throw std::runtime_error(std::string(__func__) +
                                      ": read keypool entry failed");
         }
         keypool.m_pre_split = true;
         if (!batch.WritePool(index, keypool)) {
             throw std::runtime_error(std::string(__func__) +
                                      ": writing modified keypool entry failed");
         }
         set_pre_split_keypool.insert(index);
         it = setExternalKeyPool.erase(it);
     }
 }
 
 bool LegacyScriptPubKeyMan::AddCScript(const CScript &redeemScript) {
     WalletBatch batch(m_storage.GetDatabase());
     return AddCScriptWithDB(batch, redeemScript);
 }
 
 bool LegacyScriptPubKeyMan::AddCScriptWithDB(WalletBatch &batch,
                                              const CScript &redeemScript) {
     if (!FillableSigningProvider::AddCScript(redeemScript)) {
         return false;
     }
     if (batch.WriteCScript(Hash160(redeemScript), redeemScript)) {
         m_storage.UnsetBlankWalletFlag(batch);
         return true;
     }
     return false;
 }
 
 bool LegacyScriptPubKeyMan::AddKeyOriginWithDB(WalletBatch &batch,
                                                const CPubKey &pubkey,
                                                const KeyOriginInfo &info) {
     LOCK(cs_KeyStore);
     std::copy(info.fingerprint, info.fingerprint + 4,
               mapKeyMetadata[pubkey.GetID()].key_origin.fingerprint);
     mapKeyMetadata[pubkey.GetID()].key_origin.path = info.path;
     mapKeyMetadata[pubkey.GetID()].has_key_origin = true;
     mapKeyMetadata[pubkey.GetID()].hdKeypath = WriteHDKeypath(info.path);
     return batch.WriteKeyMetadata(mapKeyMetadata[pubkey.GetID()], pubkey, true);
 }
 
 bool LegacyScriptPubKeyMan::ImportScripts(const std::set<CScript> scripts,
                                           int64_t timestamp) {
     WalletBatch batch(m_storage.GetDatabase());
     for (const auto &entry : scripts) {
         CScriptID id(entry);
         if (HaveCScript(id)) {
             WalletLogPrintf("Already have script %s, skipping\n",
                             HexStr(entry));
             continue;
         }
         if (!AddCScriptWithDB(batch, entry)) {
             return false;
         }
 
         if (timestamp > 0) {
             m_script_metadata[CScriptID(entry)].nCreateTime = timestamp;
         }
     }
     if (timestamp > 0) {
         UpdateTimeFirstKey(timestamp);
     }
 
     return true;
 }
 
 bool LegacyScriptPubKeyMan::ImportPrivKeys(
     const std::map<CKeyID, CKey> &privkey_map, const int64_t timestamp) {
     WalletBatch batch(m_storage.GetDatabase());
     for (const auto &entry : privkey_map) {
         const CKey &key = entry.second;
         CPubKey pubkey = key.GetPubKey();
         const CKeyID &id = entry.first;
         assert(key.VerifyPubKey(pubkey));
         // Skip if we already have the key
         if (HaveKey(id)) {
             WalletLogPrintf("Already have key with pubkey %s, skipping\n",
                             HexStr(pubkey));
             continue;
         }
         mapKeyMetadata[id].nCreateTime = timestamp;
         // If the private key is not present in the wallet, insert it.
         if (!AddKeyPubKeyWithDB(batch, key, pubkey)) {
             return false;
         }
         UpdateTimeFirstKey(timestamp);
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::ImportPubKeys(
     const std::vector<CKeyID> &ordered_pubkeys,
     const std::map<CKeyID, CPubKey> &pubkey_map,
     const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>> &key_origins,
     const bool add_keypool, const bool internal, const int64_t timestamp) {
     WalletBatch batch(m_storage.GetDatabase());
     for (const auto &entry : key_origins) {
         AddKeyOriginWithDB(batch, entry.second.first, entry.second.second);
     }
     for (const CKeyID &id : ordered_pubkeys) {
         auto entry = pubkey_map.find(id);
         if (entry == pubkey_map.end()) {
             continue;
         }
         const CPubKey &pubkey = entry->second;
         CPubKey temp;
         if (GetPubKey(id, temp)) {
             // Already have pubkey, skipping
             WalletLogPrintf("Already have pubkey %s, skipping\n", HexStr(temp));
             continue;
         }
         if (!AddWatchOnlyWithDB(batch, GetScriptForRawPubKey(pubkey),
                                 timestamp)) {
             return false;
         }
         mapKeyMetadata[id].nCreateTime = timestamp;
 
         // Add to keypool only works with pubkeys
         if (add_keypool) {
             AddKeypoolPubkeyWithDB(pubkey, internal, batch);
             NotifyCanGetAddressesChanged();
         }
     }
     return true;
 }
 
 bool LegacyScriptPubKeyMan::ImportScriptPubKeys(
     const std::set<CScript> &script_pub_keys, const bool have_solving_data,
     const int64_t timestamp) {
     WalletBatch batch(m_storage.GetDatabase());
     for (const CScript &script : script_pub_keys) {
         if (!have_solving_data || !IsMine(script)) {
             // Always call AddWatchOnly for non-solvable watch-only, so that
             // watch timestamp gets updated
             if (!AddWatchOnlyWithDB(batch, script, timestamp)) {
                 return false;
             }
         }
     }
     return true;
 }
 
 std::set<CKeyID> LegacyScriptPubKeyMan::GetKeys() const {
     LOCK(cs_KeyStore);
     if (!m_storage.HasEncryptionKeys()) {
         return FillableSigningProvider::GetKeys();
     }
     std::set<CKeyID> set_address;
     for (const auto &mi : mapCryptedKeys) {
         set_address.insert(mi.first);
     }
     return set_address;
 }
 
 void LegacyScriptPubKeyMan::SetType(OutputType type, bool internal) {}
 
 bool DescriptorScriptPubKeyMan::GetNewDestination(const OutputType type,
                                                   CTxDestination &dest,
                                                   std::string &error) {
     return false;
 }
 
 isminetype DescriptorScriptPubKeyMan::IsMine(const CScript &script) const {
     LOCK(cs_desc_man);
     if (m_map_script_pub_keys.count(script) > 0) {
         return ISMINE_SPENDABLE;
     }
     return ISMINE_NO;
 }
 
 bool DescriptorScriptPubKeyMan::CheckDecryptionKey(
     const CKeyingMaterial &master_key, bool accept_no_keys) {
     return false;
 }
 
 bool DescriptorScriptPubKeyMan::Encrypt(const CKeyingMaterial &master_key,
                                         WalletBatch *batch) {
     return false;
 }
 
 bool DescriptorScriptPubKeyMan::GetReservedDestination(const OutputType type,
                                                        bool internal,
                                                        CTxDestination &address,
                                                        int64_t &index,
                                                        CKeyPool &keypool) {
     return false;
 }
 
 void DescriptorScriptPubKeyMan::ReturnDestination(int64_t index, bool internal,
                                                   const CTxDestination &addr) {}
 
 bool DescriptorScriptPubKeyMan::TopUp(unsigned int size) {
     return false;
 }
 
 void DescriptorScriptPubKeyMan::MarkUnusedAddresses(const CScript &script) {
     LOCK(cs_desc_man);
     if (IsMine(script)) {
         int32_t index = m_map_script_pub_keys[script];
         if (index >= m_wallet_descriptor.next_index) {
             WalletLogPrintf("%s: Detected a used keypool item at index %d, "
                             "mark all keypool items up to this item as used\n",
                             __func__, index);
             m_wallet_descriptor.next_index = index + 1;
         }
         if (!TopUp()) {
             WalletLogPrintf("%s: Topping up keypool failed (locked wallet)\n",
                             __func__);
         }
     }
 }
 
 bool DescriptorScriptPubKeyMan::AddDescriptorKeyWithDB(WalletBatch &batch,
                                                        const CKey &key,
                                                        const CPubKey &pubkey) {
     AssertLockHeld(cs_desc_man);
     assert(!m_storage.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));
 
     if (m_storage.HasEncryptionKeys()) {
         if (m_storage.IsLocked()) {
             return false;
         }
 
         std::vector<uint8_t> crypted_secret;
         CKeyingMaterial secret(key.begin(), key.end());
         if (!EncryptSecret(m_storage.GetEncryptionKey(), secret,
                            pubkey.GetHash(), crypted_secret)) {
             return false;
         }
 
         m_map_crypted_keys[pubkey.GetID()] = make_pair(pubkey, crypted_secret);
         return batch.WriteCryptedDescriptorKey(GetID(), pubkey, crypted_secret);
     } else {
         m_map_keys[pubkey.GetID()] = key;
         return batch.WriteDescriptorKey(GetID(), pubkey, key.GetPrivKey());
     }
 }
 
+bool DescriptorScriptPubKeyMan::SetupDescriptorGeneration(
+    const CExtKey &master_key) {
+    LOCK(cs_desc_man);
+    assert(m_storage.IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
+
+    // Ignore when there is already a descriptor
+    if (m_wallet_descriptor.descriptor) {
+        return false;
+    }
+
+    int64_t creation_time = GetTime();
+
+    std::string xpub = EncodeExtPubKey(master_key.Neuter());
+
+    // Build descriptor string
+    std::string desc_prefix;
+    std::string desc_suffix = "/*)";
+    switch (m_address_type) {
+        case OutputType::LEGACY: {
+            desc_prefix = "pkh(" + xpub + "/44'";
+            break;
+        }
+        default:
+            assert(false);
+    }
+
+    // Mainnet derives at 0', testnet and regtest derive at 1'
+    if (m_storage.GetChainParams().IsTestChain()) {
+        desc_prefix += "/1'";
+    } else {
+        desc_prefix += "/0'";
+    }
+
+    std::string internal_path = m_internal ? "/1" : "/0";
+    std::string desc_str = desc_prefix + "/0'" + internal_path + desc_suffix;
+
+    // Make the descriptor
+    FlatSigningProvider keys;
+    std::string error;
+    std::unique_ptr<Descriptor> desc = Parse(desc_str, keys, error, false);
+    WalletDescriptor w_desc(std::move(desc), creation_time, 0, 0, 0);
+    m_wallet_descriptor = w_desc;
+
+    // Store the master private key, and descriptor
+    WalletBatch batch(m_storage.GetDatabase());
+    if (!AddDescriptorKeyWithDB(batch, master_key.key,
+                                master_key.key.GetPubKey())) {
+        throw std::runtime_error(
+            std::string(__func__) +
+            ": writing descriptor master private key failed");
+    }
+    if (!batch.WriteDescriptor(GetID(), m_wallet_descriptor)) {
+        throw std::runtime_error(std::string(__func__) +
+                                 ": writing descriptor failed");
+    }
+
+    // TopUp
+    TopUp();
+
+    m_storage.UnsetBlankWalletFlag(batch);
+    return true;
+}
+
 bool DescriptorScriptPubKeyMan::IsHDEnabled() const {
     LOCK(cs_desc_man);
     return m_wallet_descriptor.descriptor->IsRange();
 }
 
 bool DescriptorScriptPubKeyMan::CanGetAddresses(bool internal) const {
     // We can only give out addresses from descriptors that are single type (not
     // combo), ranged, and either have cached keys or can generate more keys
     // (ignoring encryption)
     LOCK(cs_desc_man);
     return m_wallet_descriptor.descriptor->IsSingleType() &&
            m_wallet_descriptor.descriptor->IsRange() &&
            (HavePrivateKeys() ||
             m_wallet_descriptor.next_index < m_wallet_descriptor.range_end);
 }
 
 bool DescriptorScriptPubKeyMan::HavePrivateKeys() const {
     LOCK(cs_desc_man);
     return m_map_keys.size() > 0 || m_map_crypted_keys.size() > 0;
 }
 
 int64_t DescriptorScriptPubKeyMan::GetOldestKeyPoolTime() const {
     return GetTime();
 }
 
 size_t DescriptorScriptPubKeyMan::KeypoolCountExternalKeys() const {
     if (m_internal) {
         return 0;
     }
     return GetKeyPoolSize();
 }
 
 unsigned int DescriptorScriptPubKeyMan::GetKeyPoolSize() const {
     LOCK(cs_desc_man);
     return m_wallet_descriptor.range_end - m_wallet_descriptor.next_index;
 }
 
 int64_t DescriptorScriptPubKeyMan::GetTimeFirstKey() const {
     LOCK(cs_desc_man);
     return m_wallet_descriptor.creation_time;
 }
 
 std::unique_ptr<SigningProvider>
 DescriptorScriptPubKeyMan::GetSolvingProvider(const CScript &script) const {
     return nullptr;
 }
 
 bool DescriptorScriptPubKeyMan::CanProvide(const CScript &script,
                                            SignatureData &sigdata) {
     return IsMine(script);
 }
 
 bool DescriptorScriptPubKeyMan::SignTransaction(
     CMutableTransaction &tx, const std::map<COutPoint, Coin> &coins,
     SigHashType sighash, std::map<int, std::string> &input_errors) const {
     return false;
 }
 
 SigningResult
 DescriptorScriptPubKeyMan::SignMessage(const std::string &message,
                                        const PKHash &pkhash,
                                        std::string &str_sig) const {
     return SigningResult::SIGNING_FAILED;
 }
 
 TransactionError
 DescriptorScriptPubKeyMan::FillPSBT(PartiallySignedTransaction &psbt,
                                     SigHashType sighash_type, bool sign,
                                     bool bip32derivs) const {
     return TransactionError::INVALID_PSBT;
 }
 
 const CKeyMetadata *
 DescriptorScriptPubKeyMan::GetMetadata(const CTxDestination &dest) const {
     return nullptr;
 }
 
 uint256 DescriptorScriptPubKeyMan::GetID() const {
     LOCK(cs_desc_man);
     std::string desc_str = m_wallet_descriptor.descriptor->ToString();
     uint256 id;
     CSHA256()
         .Write((uint8_t *)desc_str.data(), desc_str.size())
         .Finalize(id.begin());
     return id;
 }
 
 void DescriptorScriptPubKeyMan::SetType(OutputType type, bool internal) {
     this->m_address_type = type;
     this->m_internal = internal;
 }
 
 void DescriptorScriptPubKeyMan::SetCache(const DescriptorCache &cache) {
     LOCK(cs_desc_man);
     m_wallet_descriptor.cache = cache;
     for (int32_t i = m_wallet_descriptor.range_start;
          i < m_wallet_descriptor.range_end; ++i) {
         FlatSigningProvider out_keys;
         std::vector<CScript> scripts_temp;
         if (!m_wallet_descriptor.descriptor->ExpandFromCache(
                 i, m_wallet_descriptor.cache, scripts_temp, out_keys)) {
             throw std::runtime_error(
                 "Error: Unable to expand wallet descriptor from cache");
         }
         // Add all of the scriptPubKeys to the scriptPubKey set
         for (const CScript &script : scripts_temp) {
             if (m_map_script_pub_keys.count(script) != 0) {
                 throw std::runtime_error(
                     strprintf("Error: Already loaded script at index %d as "
                               "being at index %d",
                               i, m_map_script_pub_keys[script]));
             }
             m_map_script_pub_keys[script] = i;
         }
     }
 }
 
 bool DescriptorScriptPubKeyMan::AddKey(const CKeyID &key_id, const CKey &key) {
     LOCK(cs_desc_man);
     m_map_keys[key_id] = key;
     return true;
 }
 
 bool DescriptorScriptPubKeyMan::AddCryptedKey(
     const CKeyID &key_id, const CPubKey &pubkey,
     const std::vector<uint8_t> &crypted_key) {
     LOCK(cs_desc_man);
     if (!m_map_keys.empty()) {
         return false;
     }
 
     m_map_crypted_keys[key_id] = make_pair(pubkey, crypted_key);
     return true;
 }
diff --git a/src/wallet/scriptpubkeyman.h b/src/wallet/scriptpubkeyman.h
index 52f155f57..67f6b55fb 100644
--- a/src/wallet/scriptpubkeyman.h
+++ b/src/wallet/scriptpubkeyman.h
@@ -1,717 +1,722 @@
 // Copyright (c) 2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_WALLET_SCRIPTPUBKEYMAN_H
 #define BITCOIN_WALLET_SCRIPTPUBKEYMAN_H
 
 #include <psbt.h>
 #include <script/descriptor.h>
 #include <script/signingprovider.h>
 #include <script/standard.h>
 #include <util/error.h>
 #include <util/message.h>
 #include <wallet/crypter.h>
 #include <wallet/ismine.h>
 #include <wallet/walletdb.h>
 #include <wallet/walletutil.h>
 
 #include <boost/signals2/signal.hpp>
 
 enum class OutputType;
+class CChainParams;
 struct bilingual_str;
 
 // Wallet storage things that ScriptPubKeyMans need in order to be able to store
 // things to the wallet database. It provides access to things that are part of
 // the entire wallet and not specific to a ScriptPubKeyMan such as wallet flags,
 // wallet version, encryption keys, encryption status, and the database itself.
 // This allows a ScriptPubKeyMan to have callbacks into CWallet without causing
 // a circular dependency. WalletStorage should be the same for all
 // ScriptPubKeyMans of a wallet.
 class WalletStorage {
 public:
     virtual ~WalletStorage() = default;
     virtual const std::string GetDisplayName() const = 0;
     virtual WalletDatabase &GetDatabase() = 0;
+    virtual const CChainParams &GetChainParams() const = 0;
     virtual bool IsWalletFlagSet(uint64_t) const = 0;
     virtual void UnsetBlankWalletFlag(WalletBatch &) = 0;
     virtual bool CanSupportFeature(enum WalletFeature) const = 0;
     virtual void SetMinVersion(enum WalletFeature, WalletBatch * = nullptr,
                                bool = false) = 0;
     virtual const CKeyingMaterial &GetEncryptionKey() const = 0;
     virtual bool HasEncryptionKeys() const = 0;
     virtual bool IsLocked() const = 0;
 };
 
 //! Default for -keypool
 static const unsigned int DEFAULT_KEYPOOL_SIZE = 1000;
 
 std::vector<CKeyID> GetAffectedKeys(const CScript &spk,
                                     const SigningProvider &provider);
 
 /**
  * A key from a CWallet's keypool
  *
  * The wallet holds one (for pre HD-split wallets) or several keypools. These
  * are sets of keys that have not yet been used to provide addresses or receive
  * change.
  *
  * The Bitcoin ABC wallet was originally a collection of unrelated private
  * keys with their associated addresses. If a non-HD wallet generated a
  * key/address, gave that address out and then restored a backup from before
  * that key's generation, then any funds sent to that address would be
  * lost definitively.
  *
  * The keypool was implemented to avoid this scenario (commit: 10384941). The
  * wallet would generate a set of keys (100 by default). When a new public key
  * was required, either to give out as an address or to use in a change output,
  * it would be drawn from the keypool. The keypool would then be topped up to
  * maintain 100 keys. This ensured that as long as the wallet hadn't used more
  * than 100 keys since the previous backup, all funds would be safe, since a
  * restored wallet would be able to scan for all owned addresses.
  *
  * A keypool also allowed encrypted wallets to give out addresses without
  * having to be decrypted to generate a new private key.
  *
  * With the introduction of HD wallets (commit: f1902510), the keypool
  * essentially became an address look-ahead pool. Restoring old backups can no
  * longer definitively lose funds as long as the addresses used were from the
  * wallet's HD seed (since all private keys can be rederived from the seed).
  * However, if many addresses were used since the backup, then the wallet may
  * not know how far ahead in the HD chain to look for its addresses. The
  * keypool is used to implement a 'gap limit'. The keypool maintains a set of
  * keys (by default 1000) ahead of the last used key and scans for the
  * addresses of those keys.  This avoids the risk of not seeing transactions
  * involving the wallet's addresses, or of re-using the same address.
  * In the unlikely case where none of the addresses in the `gap limit` are
  * used on-chain, the look-ahead will not be incremented to keep
  * a constant size and addresses beyond this range will not be detected by an
  * old backup. For this reason, it is not recommended to decrease keypool size
  * lower than default value.
  *
  * The HD-split wallet feature added a second keypool (commit: 02592f4c). There
  * is an external keypool (for addresses to hand out) and an internal keypool
  * (for change addresses).
  *
  * Keypool keys are stored in the wallet/keystore's keymap. The keypool data is
  * stored as sets of indexes in the wallet (setInternalKeyPool,
  * setExternalKeyPool and set_pre_split_keypool), and a map from the key to the
  * index (m_pool_key_to_index). The CKeyPool object is used to
  * serialize/deserialize the pool data to/from the database.
  */
 class CKeyPool {
 public:
     //! The time at which the key was generated. Set in AddKeypoolPubKeyWithDB
     int64_t nTime;
     //! The public key
     CPubKey vchPubKey;
     //! Whether this keypool entry is in the internal keypool (for change
     //! outputs)
     bool fInternal;
     //! Whether this key was generated for a keypool before the wallet was
     //! upgraded to HD-split
     bool m_pre_split;
 
     CKeyPool();
     CKeyPool(const CPubKey &vchPubKeyIn, bool internalIn);
 
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
     inline void SerializationOp(Stream &s, Operation ser_action) {
         int nVersion = s.GetVersion();
         if (!(s.GetType() & SER_GETHASH)) {
             READWRITE(nVersion);
         }
 
         READWRITE(nTime);
         READWRITE(vchPubKey);
         if (ser_action.ForRead()) {
             try {
                 READWRITE(fInternal);
             } catch (std::ios_base::failure &) {
                 /**
                  * flag as external address if we can't read the internal
                  * boolean (this will be the case for any wallet before the HD
                  * chain split version)
                  */
                 fInternal = false;
             }
             try {
                 READWRITE(m_pre_split);
             } catch (std::ios_base::failure &) {
                 /**
                  * flag as postsplit address if we can't read the m_pre_split
                  * boolean (this will be the case for any wallet that upgrades
                  * to HD chain split)
                  */
                 m_pre_split = false;
             }
         } else {
             READWRITE(fInternal);
             READWRITE(m_pre_split);
         }
     }
 };
 
 /*
  * A class implementing ScriptPubKeyMan manages some (or all) scriptPubKeys used
  * in a wallet. It contains the scripts and keys related to the scriptPubKeys it
  * manages. A ScriptPubKeyMan will be able to give out scriptPubKeys to be used,
  * as well as marking when a scriptPubKey has been used. It also handles when
  * and how to store a scriptPubKey and its related scripts and keys, including
  * encryption.
  */
 class ScriptPubKeyMan {
 protected:
     WalletStorage &m_storage;
 
 public:
     ScriptPubKeyMan(WalletStorage &storage) : m_storage(storage) {}
     virtual ~ScriptPubKeyMan(){};
     virtual bool GetNewDestination(const OutputType type, CTxDestination &dest,
                                    std::string &error) {
         return false;
     }
     virtual isminetype IsMine(const CScript &script) const { return ISMINE_NO; }
 
     //! Check that the given decryption key is valid for this ScriptPubKeyMan,
     //! i.e. it decrypts all of the keys handled by it.
     virtual bool CheckDecryptionKey(const CKeyingMaterial &master_key,
                                     bool accept_no_keys = false) {
         return false;
     }
     virtual bool Encrypt(const CKeyingMaterial &master_key,
                          WalletBatch *batch) {
         return false;
     }
 
     virtual bool GetReservedDestination(const OutputType type, bool internal,
                                         CTxDestination &address, int64_t &index,
                                         CKeyPool &keypool) {
         return false;
     }
     virtual void KeepDestination(int64_t index, const OutputType &type) {}
     virtual void ReturnDestination(int64_t index, bool internal,
                                    const CTxDestination &addr) {}
 
     /**
      * Fills internal address pool. Use within ScriptPubKeyMan implementations
      * should be used sparingly and only when something from the address pool is
      * removed, excluding GetNewDestination and GetReservedDestination. External
      * wallet code is primarily responsible for topping up prior to fetching new
      * addresses
      */
     virtual bool TopUp(unsigned int size = 0) { return false; }
 
     //! Mark unused addresses as being used
     virtual void MarkUnusedAddresses(const CScript &script) {}
 
     /**
      * Sets up the key generation stuff, i.e. generates new HD seeds and sets
      * them as active. Returns false if already setup or setup fails, true if
      * setup is successful Set force=true to make it re-setup if already setup,
      * used for upgrades
      */
     virtual bool SetupGeneration(bool force = false) { return false; }
 
     /* Returns true if HD is enabled */
     virtual bool IsHDEnabled() const { return false; }
 
     /**
      * Returns true if the wallet can give out new addresses. This means it has
      * keys in the keypool or can generate new keys.
      */
     virtual bool CanGetAddresses(bool internal = false) const { return false; }
 
     /** Upgrades the wallet to the specified version */
     virtual bool Upgrade(int prev_version, bilingual_str &error) {
         return false;
     }
 
     virtual bool HavePrivateKeys() const { return false; }
 
     //! The action to do when the DB needs rewrite
     virtual void RewriteDB() {}
 
     virtual int64_t GetOldestKeyPoolTime() const { return GetTime(); }
 
     virtual size_t KeypoolCountExternalKeys() const { return 0; }
     virtual unsigned int GetKeyPoolSize() const { return 0; }
 
     virtual int64_t GetTimeFirstKey() const { return 0; }
 
     virtual const CKeyMetadata *GetMetadata(const CTxDestination &dest) const {
         return nullptr;
     }
 
     virtual std::unique_ptr<SigningProvider>
     GetSolvingProvider(const CScript &script) const {
         return nullptr;
     }
 
     /**
      * Whether this ScriptPubKeyMan can provide a SigningProvider (via
      * GetSolvingProvider) that, combined with sigdata, can produce solving
      * data.
      */
     virtual bool CanProvide(const CScript &script, SignatureData &sigdata) {
         return false;
     }
 
     /**
      * Creates new signatures and adds them to the transaction. Returns whether
      * all inputs were signed
      */
     virtual bool
     SignTransaction(CMutableTransaction &tx,
                     const std::map<COutPoint, Coin> &coins, SigHashType sighash,
                     std::map<int, std::string> &input_errors) const {
         return false;
     }
     /** Sign a message with the given script */
     virtual SigningResult SignMessage(const std::string &message,
                                       const PKHash &pkhash,
                                       std::string &str_sig) const {
         return SigningResult::SIGNING_FAILED;
     };
     /**
      * Adds script and derivation path information to a PSBT, and optionally
      * signs it.
      */
     virtual TransactionError
     FillPSBT(PartiallySignedTransaction &psbt,
              SigHashType sighash_type = SigHashType().withForkId(),
              bool sign = true, bool bip32derivs = false) const {
         return TransactionError::INVALID_PSBT;
     }
 
     virtual uint256 GetID() const { return uint256(); }
 
     virtual void SetType(OutputType type, bool internal) {}
 
     /**
      * Prepends the wallet name in logging output to ease debugging in
      * multi-wallet use cases
      */
     template <typename... Params>
     void WalletLogPrintf(std::string fmt, Params... parameters) const {
         LogPrintf(("%s " + fmt).c_str(), m_storage.GetDisplayName(),
                   parameters...);
     };
 
     /** Watch-only address added */
     boost::signals2::signal<void(bool fHaveWatchOnly)> NotifyWatchonlyChanged;
 
     /** Keypool has new keys */
     boost::signals2::signal<void()> NotifyCanGetAddressesChanged;
 };
 
 class LegacyScriptPubKeyMan : public ScriptPubKeyMan,
                               public FillableSigningProvider {
 private:
     //! keeps track of whether Unlock has run a thorough check before
     bool fDecryptionThoroughlyChecked = false;
 
     using WatchOnlySet = std::set<CScript>;
     using WatchKeyMap = std::map<CKeyID, CPubKey>;
 
     WalletBatch *encrypted_batch GUARDED_BY(cs_KeyStore) = nullptr;
 
     using CryptedKeyMap =
         std::map<CKeyID, std::pair<CPubKey, std::vector<uint8_t>>>;
 
     CryptedKeyMap mapCryptedKeys GUARDED_BY(cs_KeyStore);
     WatchOnlySet setWatchOnly GUARDED_BY(cs_KeyStore);
     WatchKeyMap mapWatchKeys GUARDED_BY(cs_KeyStore);
 
     int64_t nTimeFirstKey GUARDED_BY(cs_KeyStore) = 0;
 
     bool AddKeyPubKeyInner(const CKey &key, const CPubKey &pubkey);
     bool AddCryptedKeyInner(const CPubKey &vchPubKey,
                             const std::vector<uint8_t> &vchCryptedSecret);
 
     /**
      * Private version of AddWatchOnly method which does not accept a
      * timestamp, and which will reset the wallet's nTimeFirstKey value to 1 if
      * the watch key did not previously have a timestamp associated with it.
      * Because this is an inherited virtual method, it is accessible despite
      * being marked private, but it is marked private anyway to encourage use
      * of the other AddWatchOnly which accepts a timestamp and sets
      * nTimeFirstKey more intelligently for more efficient rescans.
      */
     bool AddWatchOnly(const CScript &dest)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
     bool AddWatchOnlyWithDB(WalletBatch &batch, const CScript &dest)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
     bool AddWatchOnlyInMem(const CScript &dest);
     //! Adds a watch-only address to the store, and saves it to disk.
     bool AddWatchOnlyWithDB(WalletBatch &batch, const CScript &dest,
                             int64_t create_time)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     //! Adds a key to the store, and saves it to disk.
     bool AddKeyPubKeyWithDB(WalletBatch &batch, const CKey &key,
                             const CPubKey &pubkey)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     void AddKeypoolPubkeyWithDB(const CPubKey &pubkey, const bool internal,
                                 WalletBatch &batch);
 
     //! Adds a script to the store and saves it to disk
     bool AddCScriptWithDB(WalletBatch &batch, const CScript &script);
 
     /** Add a KeyOriginInfo to the wallet */
     bool AddKeyOriginWithDB(WalletBatch &batch, const CPubKey &pubkey,
                             const KeyOriginInfo &info);
 
     /* the HD chain data model (external chain counters) */
     CHDChain hdChain;
 
     /* HD derive new child key (on internal or external chain) */
     void DeriveNewChildKey(WalletBatch &batch, CKeyMetadata &metadata,
                            CKey &secret, bool internal = false)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     std::set<int64_t> setInternalKeyPool GUARDED_BY(cs_KeyStore);
     std::set<int64_t> setExternalKeyPool GUARDED_BY(cs_KeyStore);
     std::set<int64_t> set_pre_split_keypool GUARDED_BY(cs_KeyStore);
     int64_t m_max_keypool_index GUARDED_BY(cs_KeyStore) = 0;
     std::map<CKeyID, int64_t> m_pool_key_to_index;
     // Tracks keypool indexes to CKeyIDs of keys that have been taken out of the
     // keypool but may be returned to it
     std::map<int64_t, CKeyID> m_index_to_reserved_key;
 
     //! Fetches a key from the keypool
     bool GetKeyFromPool(CPubKey &key, const OutputType type,
                         bool internal = false);
 
     /**
      * Reserves a key from the keypool and sets nIndex to its index
      *
      * @param[out] nIndex the index of the key in keypool
      * @param[out] keypool the keypool the key was drawn from, which could be
      * the the pre-split pool if present, or the internal or external pool
      * @param fRequestedInternal true if the caller would like the key drawn
      *     from the internal keypool, false if external is preferred
      *
      * @return true if succeeded, false if failed due to empty keypool
      * @throws std::runtime_error if keypool read failed, key was invalid,
      *     was not found in the wallet, or was misclassified in the internal
      *     or external keypool
      */
     bool ReserveKeyFromKeyPool(int64_t &nIndex, CKeyPool &keypool,
                                bool fRequestedInternal);
 
 public:
     using ScriptPubKeyMan::ScriptPubKeyMan;
 
     bool GetNewDestination(const OutputType type, CTxDestination &dest,
                            std::string &error) override;
     isminetype IsMine(const CScript &script) const override;
 
     bool CheckDecryptionKey(const CKeyingMaterial &master_key,
                             bool accept_no_keys = false) override;
     bool Encrypt(const CKeyingMaterial &master_key,
                  WalletBatch *batch) override;
 
     bool GetReservedDestination(const OutputType type, bool internal,
                                 CTxDestination &address, int64_t &index,
                                 CKeyPool &keypool) override;
     void KeepDestination(int64_t index, const OutputType &type) override;
     void ReturnDestination(int64_t index, bool internal,
                            const CTxDestination &) override;
 
     bool TopUp(unsigned int size = 0) override;
 
     void MarkUnusedAddresses(const CScript &script) override;
 
     //! Upgrade stored CKeyMetadata objects to store key origin info as
     //! KeyOriginInfo
     void UpgradeKeyMetadata();
 
     bool IsHDEnabled() const override;
 
     bool SetupGeneration(bool force = false) override;
 
     bool Upgrade(int prev_version, bilingual_str &error) override;
 
     bool HavePrivateKeys() const override;
 
     void RewriteDB() override;
 
     int64_t GetOldestKeyPoolTime() const override;
     size_t KeypoolCountExternalKeys() const override;
     unsigned int GetKeyPoolSize() const override;
 
     int64_t GetTimeFirstKey() const override;
 
     const CKeyMetadata *GetMetadata(const CTxDestination &dest) const override;
 
     bool CanGetAddresses(bool internal = false) const override;
 
     std::unique_ptr<SigningProvider>
     GetSolvingProvider(const CScript &script) const override;
 
     bool CanProvide(const CScript &script, SignatureData &sigdata) override;
 
     bool
     SignTransaction(CMutableTransaction &tx,
                     const std::map<COutPoint, Coin> &coins, SigHashType sighash,
                     std::map<int, std::string> &input_errors) const override;
     SigningResult SignMessage(const std::string &message, const PKHash &pkhash,
                               std::string &str_sig) const override;
     TransactionError
     FillPSBT(PartiallySignedTransaction &psbt,
              SigHashType sighash_type = SigHashType().withForkId(),
              bool sign = true, bool bip32derivs = false) const override;
 
     uint256 GetID() const override;
 
     void SetType(OutputType type, bool internal) override;
 
     // Map from Key ID to key metadata.
     std::map<CKeyID, CKeyMetadata> mapKeyMetadata GUARDED_BY(cs_KeyStore);
 
     // Map from Script ID to key metadata (for watch-only keys).
     std::map<CScriptID, CKeyMetadata> m_script_metadata GUARDED_BY(cs_KeyStore);
 
     //! Adds a key to the store, and saves it to disk.
     bool AddKeyPubKey(const CKey &key, const CPubKey &pubkey) override;
     //! Adds a key to the store, without saving it to disk (used by LoadWallet)
     bool LoadKey(const CKey &key, const CPubKey &pubkey);
     //! Adds an encrypted key to the store, and saves it to disk.
     bool AddCryptedKey(const CPubKey &vchPubKey,
                        const std::vector<uint8_t> &vchCryptedSecret);
     //! Adds an encrypted key to the store, without saving it to disk (used by
     //! LoadWallet)
     bool LoadCryptedKey(const CPubKey &vchPubKey,
                         const std::vector<uint8_t> &vchCryptedSecret);
     void UpdateTimeFirstKey(int64_t nCreateTime)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
     //! Adds a CScript to the store
     bool LoadCScript(const CScript &redeemScript);
     //! Load metadata (used by LoadWallet)
     void LoadKeyMetadata(const CKeyID &keyID, const CKeyMetadata &metadata);
     void LoadScriptMetadata(const CScriptID &script_id,
                             const CKeyMetadata &metadata);
     //! Generate a new key
     CPubKey GenerateNewKey(WalletBatch &batch, bool internal = false)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     /* Set the HD chain model (chain child index counters) */
     void SetHDChain(const CHDChain &chain, bool memonly);
     const CHDChain &GetHDChain() const { return hdChain; }
 
     //! Adds a watch-only address to the store, without saving it to disk (used
     //! by LoadWallet)
     bool LoadWatchOnly(const CScript &dest);
     //! Returns whether the watch-only script is in the wallet
     bool HaveWatchOnly(const CScript &dest) const;
     //! Returns whether there are any watch-only things in the wallet
     bool HaveWatchOnly() const;
     //! Remove a watch only script from the keystore
     bool RemoveWatchOnly(const CScript &dest);
     bool AddWatchOnly(const CScript &dest, int64_t nCreateTime)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     //! Fetches a pubkey from mapWatchKeys if it exists there
     bool GetWatchPubKey(const CKeyID &address, CPubKey &pubkey_out) const;
 
     /* SigningProvider overrides */
     bool HaveKey(const CKeyID &address) const override;
     bool GetKey(const CKeyID &address, CKey &keyOut) const override;
     bool GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const override;
     bool AddCScript(const CScript &redeemScript) override;
     bool GetKeyOrigin(const CKeyID &keyid, KeyOriginInfo &info) const override;
 
     //! Load a keypool entry
     void LoadKeyPool(int64_t nIndex, const CKeyPool &keypool);
     bool NewKeyPool();
     void MarkPreSplitKeys() EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     bool ImportScripts(const std::set<CScript> scripts, int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
     bool ImportPrivKeys(const std::map<CKeyID, CKey> &privkey_map,
                         const int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
     bool ImportPubKeys(
         const std::vector<CKeyID> &ordered_pubkeys,
         const std::map<CKeyID, CPubKey> &pubkey_map,
         const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>> &key_origins,
         const bool add_keypool, const bool internal, const int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
     bool ImportScriptPubKeys(const std::set<CScript> &script_pub_keys,
                              const bool have_solving_data,
                              const int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     /* Returns true if the wallet can generate new keys */
     bool CanGenerateKeys() const;
 
     /* Generates a new HD seed (will not be activated) */
     CPubKey GenerateNewSeed();
 
     /* Derives a new HD seed (will not be activated) */
     CPubKey DeriveNewSeed(const CKey &key);
 
     /* Set the current HD seed (will reset the chain child index counters)
        Sets the seed's version based on the current wallet version (so the
        caller must ensure the current wallet version is correct before calling
        this function). */
     void SetHDSeed(const CPubKey &key);
 
     /**
      * Explicitly make the wallet learn the related scripts for outputs to the
      * given key. This is purely to make the wallet file compatible with older
      * software, as FillableSigningProvider automatically does this implicitly
      * for all keys now.
      */
     void LearnRelatedScripts(const CPubKey &key, OutputType);
 
     /**
      * Same as LearnRelatedScripts, but when the OutputType is not known (and
      * could be anything).
      */
     void LearnAllRelatedScripts(const CPubKey &key);
 
     /**
      * Marks all keys in the keypool up to and including reserve_key as used.
      */
     void MarkReserveKeysAsUsed(int64_t keypool_id)
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
     const std::map<CKeyID, int64_t> &GetAllReserveKeys() const {
         return m_pool_key_to_index;
     }
 
     std::set<CKeyID> GetKeys() const override;
 };
 
 /**
  * Wraps a LegacyScriptPubKeyMan so that it can be returned in a new unique_ptr.
  * Does not provide privkeys.
  */
 class LegacySigningProvider : public SigningProvider {
 private:
     const LegacyScriptPubKeyMan &m_spk_man;
 
 public:
     LegacySigningProvider(const LegacyScriptPubKeyMan &spk_man)
         : m_spk_man(spk_man) {}
 
     bool GetCScript(const CScriptID &scriptid, CScript &script) const override {
         return m_spk_man.GetCScript(scriptid, script);
     }
     bool HaveCScript(const CScriptID &scriptid) const override {
         return m_spk_man.HaveCScript(scriptid);
     }
     bool GetPubKey(const CKeyID &address, CPubKey &pubkey) const override {
         return m_spk_man.GetPubKey(address, pubkey);
     }
     bool GetKey(const CKeyID &address, CKey &key) const override {
         return false;
     }
     bool HaveKey(const CKeyID &address) const override { return false; }
     bool GetKeyOrigin(const CKeyID &keyid, KeyOriginInfo &info) const override {
         return m_spk_man.GetKeyOrigin(keyid, info);
     }
 };
 
 class DescriptorScriptPubKeyMan : public ScriptPubKeyMan {
 private:
     WalletDescriptor m_wallet_descriptor GUARDED_BY(cs_desc_man);
 
     // Map of scripts to descriptor range index
     using ScriptPubKeyMap = std::map<CScript, int32_t>;
     using CryptedKeyMap =
         std::map<CKeyID, std::pair<CPubKey, std::vector<uint8_t>>>;
     using KeyMap = std::map<CKeyID, CKey>;
 
     ScriptPubKeyMap m_map_script_pub_keys GUARDED_BY(cs_desc_man);
 
     OutputType m_address_type;
     bool m_internal;
 
     KeyMap m_map_keys GUARDED_BY(cs_desc_man);
     CryptedKeyMap m_map_crypted_keys GUARDED_BY(cs_desc_man);
 
     bool SetCrypted();
 
     //! keeps track of whether Unlock has run a thorough check before
     bool m_decryption_thoroughly_checked = false;
 
     bool AddDescriptorKeyWithDB(WalletBatch &batch, const CKey &key,
                                 const CPubKey &pubkey);
 
 public:
     DescriptorScriptPubKeyMan(WalletStorage &storage,
                               WalletDescriptor &descriptor)
         : ScriptPubKeyMan(storage), m_wallet_descriptor(descriptor) {}
     DescriptorScriptPubKeyMan(WalletStorage &storage, OutputType address_type,
                               bool internal)
         : ScriptPubKeyMan(storage), m_address_type(address_type),
           m_internal(internal) {}
 
     mutable RecursiveMutex cs_desc_man;
 
     bool GetNewDestination(const OutputType type, CTxDestination &dest,
                            std::string &error) override;
     isminetype IsMine(const CScript &script) const override;
 
     bool CheckDecryptionKey(const CKeyingMaterial &master_key,
                             bool accept_no_keys = false) override;
     bool Encrypt(const CKeyingMaterial &master_key,
                  WalletBatch *batch) override;
 
     bool GetReservedDestination(const OutputType type, bool internal,
                                 CTxDestination &address, int64_t &index,
                                 CKeyPool &keypool) override;
     void ReturnDestination(int64_t index, bool internal,
                            const CTxDestination &addr) override;
 
     bool TopUp(unsigned int size = 0) override;
 
     void MarkUnusedAddresses(const CScript &script) override;
 
     bool IsHDEnabled() const override;
 
+    //! Setup descriptors based on the given CExtkey
+    bool SetupDescriptorGeneration(const CExtKey &master_key);
+
     bool HavePrivateKeys() const override;
 
     int64_t GetOldestKeyPoolTime() const override;
     size_t KeypoolCountExternalKeys() const override;
     unsigned int GetKeyPoolSize() const override;
 
     int64_t GetTimeFirstKey() const override;
 
     const CKeyMetadata *GetMetadata(const CTxDestination &dest) const override;
 
     bool CanGetAddresses(bool internal = false) const override;
 
     std::unique_ptr<SigningProvider>
     GetSolvingProvider(const CScript &script) const override;
 
     bool CanProvide(const CScript &script, SignatureData &sigdata) override;
 
     bool
     SignTransaction(CMutableTransaction &tx,
                     const std::map<COutPoint, Coin> &coins, SigHashType sighash,
                     std::map<int, std::string> &input_errors) const override;
     SigningResult SignMessage(const std::string &message, const PKHash &pkhash,
                               std::string &str_sig) const override;
     TransactionError
     FillPSBT(PartiallySignedTransaction &psbt,
              SigHashType sighash_type = SigHashType().withForkId(),
              bool sign = true, bool bip32derivs = false) const override;
 
     uint256 GetID() const override;
 
     void SetType(OutputType type, bool internal) override;
 
     void SetCache(const DescriptorCache &cache);
 
     bool AddKey(const CKeyID &key_id, const CKey &key);
     bool AddCryptedKey(const CKeyID &key_id, const CPubKey &pubkey,
                        const std::vector<uint8_t> &crypted_key);
 };
 
 #endif // BITCOIN_WALLET_SCRIPTPUBKEYMAN_H
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index f1d2b61be..f1f4c6a26 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -1,1577 +1,1580 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2016 The Bitcoin Core developers
 // Copyright (c) 2018-2020 The Bitcoin developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_WALLET_WALLET_H
 #define BITCOIN_WALLET_WALLET_H
 
 #include <amount.h>
 #include <interfaces/chain.h>
 #include <interfaces/handler.h>
 #include <outputtype.h>
 #include <primitives/blockhash.h>
 #include <psbt.h>
 #include <tinyformat.h>
 #include <ui_interface.h>
 #include <util/message.h>
 #include <util/strencodings.h>
 #include <util/system.h>
 #include <util/translation.h>
 #include <validationinterface.h>
 #include <wallet/coinselection.h>
 #include <wallet/crypter.h>
 #include <wallet/rpcwallet.h>
 #include <wallet/scriptpubkeyman.h>
 #include <wallet/walletdb.h>
 #include <wallet/walletutil.h>
 
 #include <algorithm>
 #include <atomic>
 #include <cstdint>
 #include <map>
 #include <memory>
 #include <set>
 #include <stdexcept>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include <boost/signals2/signal.hpp>
 
 using LoadWalletFn =
     std::function<void(std::unique_ptr<interfaces::Wallet> wallet)>;
 
 struct bilingual_str;
 
 //! Explicitly unload and delete the wallet.
 //! Blocks the current thread after signaling the unload intent so that all
 //! wallet clients release the wallet.
 //! Note that, when blocking is not required, the wallet is implicitly unloaded
 //! by the shared pointer deleter.
 void UnloadWallet(std::shared_ptr<CWallet> &&wallet);
 
 bool AddWallet(const std::shared_ptr<CWallet> &wallet);
 bool RemoveWallet(const std::shared_ptr<CWallet> &wallet);
 bool HasWallets();
 std::vector<std::shared_ptr<CWallet>> GetWallets();
 std::shared_ptr<CWallet> GetWallet(const std::string &name);
 std::shared_ptr<CWallet> LoadWallet(const CChainParams &chainParams,
                                     interfaces::Chain &chain,
                                     const WalletLocation &location,
                                     bilingual_str &error,
                                     std::vector<bilingual_str> &warnings);
 std::unique_ptr<interfaces::Handler> HandleLoadWallet(LoadWalletFn load_wallet);
 
 enum class WalletCreationStatus { SUCCESS, CREATION_FAILED, ENCRYPTION_FAILED };
 
 WalletCreationStatus CreateWallet(const CChainParams &params,
                                   interfaces::Chain &chain,
                                   const SecureString &passphrase,
                                   uint64_t wallet_creation_flags,
                                   const std::string &name, bilingual_str &error,
                                   std::vector<bilingual_str> &warnings,
                                   std::shared_ptr<CWallet> &result);
 //! -paytxfee default
 constexpr Amount DEFAULT_PAY_TX_FEE = Amount::zero();
 //! -fallbackfee default
 static const Amount DEFAULT_FALLBACK_FEE = Amount::zero();
 //! -mintxfee default
 static const Amount DEFAULT_TRANSACTION_MINFEE_PER_KB = 1000 * SATOSHI;
 /**
  * maximum fee increase allowed to do partial spend avoidance, even for nodes
  * with this feature disabled by default
  *
  * A value of -1 disables this feature completely.
  * A value of 0 (current default) means to attempt to do partial spend
  * avoidance, and use its results if the fees remain *unchanged* A value > 0
  * means to do partial spend avoidance if the fee difference against a regular
  * coin selection instance is in the range [0..value].
  */
 static const Amount DEFAULT_MAX_AVOIDPARTIALSPEND_FEE = Amount::zero();
 //! discourage APS fee higher than this amount
 constexpr Amount HIGH_APS_FEE{COIN / 10000};
 //! minimum recommended increment for BIP 125 replacement txs
 static const Amount WALLET_INCREMENTAL_RELAY_FEE(5000 * SATOSHI);
 //! Default for -spendzeroconfchange
 static const bool DEFAULT_SPEND_ZEROCONF_CHANGE = true;
 //! Default for -walletrejectlongchains
 static const bool DEFAULT_WALLET_REJECT_LONG_CHAINS = false;
 static const bool DEFAULT_WALLETBROADCAST = true;
 static const bool DEFAULT_DISABLE_WALLET = false;
 //! -maxtxfee default
 constexpr Amount DEFAULT_TRANSACTION_MAXFEE{COIN / 10};
 //! Discourage users to set fees higher than this amount (in satoshis) per kB
 constexpr Amount HIGH_TX_FEE_PER_KB{COIN / 100};
 //! -maxtxfee will warn if called with a higher fee than this amount (in
 //! satoshis)
 constexpr Amount HIGH_MAX_TX_FEE{100 * HIGH_TX_FEE_PER_KB};
 
 class CChainParams;
 class CCoinControl;
 class COutput;
 class CScript;
 class CTxMemPool;
 class CWalletTx;
 class ReserveDestination;
 
 //! Default for -addresstype
 constexpr OutputType DEFAULT_ADDRESS_TYPE{OutputType::LEGACY};
 
 //! Default for -changetype
 constexpr OutputType DEFAULT_CHANGE_TYPE{OutputType::CHANGE_AUTO};
 
 static constexpr uint64_t KNOWN_WALLET_FLAGS =
     WALLET_FLAG_AVOID_REUSE | WALLET_FLAG_BLANK_WALLET |
     WALLET_FLAG_KEY_ORIGIN_METADATA | WALLET_FLAG_DISABLE_PRIVATE_KEYS |
     WALLET_FLAG_DESCRIPTORS;
 
 static constexpr uint64_t MUTABLE_WALLET_FLAGS = WALLET_FLAG_AVOID_REUSE;
 
 static const std::map<std::string, WalletFlags> WALLET_FLAG_MAP{
     {"avoid_reuse", WALLET_FLAG_AVOID_REUSE},
     {"blank", WALLET_FLAG_BLANK_WALLET},
     {"key_origin_metadata", WALLET_FLAG_KEY_ORIGIN_METADATA},
     {"disable_private_keys", WALLET_FLAG_DISABLE_PRIVATE_KEYS},
     {"descriptor_wallet", WALLET_FLAG_DESCRIPTORS},
 };
 
 extern const std::map<uint64_t, std::string> WALLET_FLAG_CAVEATS;
 
 /**
  * A wrapper to reserve an address from a wallet
  *
  * ReserveDestination is used to reserve an address.
  * It is currently only used inside of CreateTransaction.
  *
  * Instantiating a ReserveDestination does not reserve an address. To do so,
  * GetReservedDestination() needs to be called on the object. Once an address
  * has been reserved, call KeepDestination() on the ReserveDestination object to
  * make sure it is not returned. Call ReturnDestination() to return the address
  * so it can be re-used (for example, if the address was used in a new
  * transaction and that transaction was not completed and needed to be aborted).
  *
  * If an address is reserved and KeepDestination() is not called, then the
  * address will be returned when the ReserveDestination goes out of scope.
  */
 class ReserveDestination {
 protected:
     //! The wallet to reserve from
     const CWallet *const pwallet;
     //! The ScriptPubKeyMan to reserve from. Based on type when
     //! GetReservedDestination is called
     ScriptPubKeyMan *m_spk_man{nullptr};
     OutputType const type;
     //! The index of the address's key in the keypool
     int64_t nIndex{-1};
     //! The destination
     CTxDestination address;
     //! Whether this is from the internal (change output) keypool
     bool fInternal{false};
 
 public:
     //! Construct a ReserveDestination object. This does NOT reserve an address
     //! yet
     explicit ReserveDestination(CWallet *_pwallet, OutputType _type)
         : pwallet(_pwallet), type(_type) {}
 
     ReserveDestination(const ReserveDestination &) = delete;
     ReserveDestination &operator=(const ReserveDestination &) = delete;
 
     //! Destructor. If a key has been reserved and not KeepKey'ed, it will be
     //! returned to the keypool
     ~ReserveDestination() { ReturnDestination(); }
 
     //! Reserve an address
     bool GetReservedDestination(CTxDestination &pubkey, bool internal);
     //! Return reserved address
     void ReturnDestination();
     //! Keep the address. Do not return it's key to the keypool when this object
     //! goes out of scope
     void KeepDestination();
 };
 
 /** Address book data */
 class CAddressBookData {
 private:
     bool m_change{true};
     std::string m_label;
 
 public:
     std::string purpose;
 
     CAddressBookData() : purpose("unknown") {}
 
     typedef std::map<std::string, std::string> StringMap;
     StringMap destdata;
 
     bool IsChange() const { return m_change; }
     const std::string &GetLabel() const { return m_label; }
     void SetLabel(const std::string &label) {
         m_change = false;
         m_label = label;
     }
 };
 
 struct CRecipient {
     CScript scriptPubKey;
     Amount nAmount;
     bool fSubtractFeeFromAmount;
 };
 
 typedef std::map<std::string, std::string> mapValue_t;
 
 static inline void ReadOrderPos(int64_t &nOrderPos, mapValue_t &mapValue) {
     if (!mapValue.count("n")) {
         // TODO: calculate elsewhere
         nOrderPos = -1;
         return;
     }
 
     nOrderPos = atoi64(mapValue["n"].c_str());
 }
 
 static inline void WriteOrderPos(const int64_t &nOrderPos,
                                  mapValue_t &mapValue) {
     if (nOrderPos == -1) {
         return;
     }
     mapValue["n"] = i64tostr(nOrderPos);
 }
 
 struct COutputEntry {
     CTxDestination destination;
     Amount amount;
     int vout;
 };
 
 /**
  * Legacy class used for deserializing vtxPrev for backwards compatibility.
  * vtxPrev was removed in commit 93a18a3650292afbb441a47d1fa1b94aeb0164e3,
  * but old wallet.dat files may still contain vtxPrev vectors of CMerkleTxs.
  * These need to get deserialized for field alignment when deserializing
  * a CWalletTx, but the deserialized values are discarded.
  */
 class CMerkleTx {
 public:
     template <typename Stream> void Unserialize(Stream &s) {
         CTransactionRef tx;
         BlockHash hashBlock;
         std::vector<uint256> vMerkleBranch;
         int nIndex = 0;
 
         s >> tx >> hashBlock >> vMerkleBranch >> nIndex;
     }
 };
 
 // Get the marginal bytes of spending the specified output
 int CalculateMaximumSignedInputSize(const CTxOut &txout, const CWallet *pwallet,
                                     bool use_max_sig = false);
 
 /**
  * A transaction with a bunch of additional info that only the owner cares
  * about. It includes any unrecorded transactions needed to link it back to the
  * block chain.
  */
 class CWalletTx {
 private:
     const CWallet *pwallet;
 
     /**
      * Constant used in hashBlock to indicate tx has been abandoned, only used
      * at serialization/deserialization to avoid ambiguity with conflicted.
      */
     static const BlockHash ABANDON_HASH;
 
 public:
     /**
      * Key/value map with information about the transaction.
      *
      * The following keys can be read and written through the map and are
      * serialized in the wallet database:
      *
      *     "comment", "to"   - comment strings provided to sendtoaddress,
      *                         and sendmany wallet RPCs
      *     "replaces_txid"   - txid (as HexStr) of transaction replaced by
      *                         bumpfee on transaction created by bumpfee
      *     "replaced_by_txid" - txid (as HexStr) of transaction created by
      *                         bumpfee on transaction replaced by bumpfee
      *     "from", "message" - obsolete fields that could be set in UI prior to
      *                         2011 (removed in commit 4d9b223)
      *
      * The following keys are serialized in the wallet database, but shouldn't
      * be read or written through the map (they will be temporarily added and
      * removed from the map during serialization):
      *
      *     "fromaccount"     - serialized strFromAccount value
      *     "n"               - serialized nOrderPos value
      *     "timesmart"       - serialized nTimeSmart value
      *     "spent"           - serialized vfSpent value that existed prior to
      *                         2014 (removed in commit 93a18a3)
      */
     mapValue_t mapValue;
     std::vector<std::pair<std::string, std::string>> vOrderForm;
     unsigned int fTimeReceivedIsTxTime;
     //! time received by this node
     unsigned int nTimeReceived;
     /**
      * Stable timestamp that never changes, and reflects the order a transaction
      * was added to the wallet. Timestamp is based on the block time for a
      * transaction added as part of a block, or else the time when the
      * transaction was received if it wasn't part of a block, with the timestamp
      * adjusted in both cases so timestamp order matches the order transactions
      * were added to the wallet. More details can be found in
      * CWallet::ComputeTimeSmart().
      */
     unsigned int nTimeSmart;
     /**
      * From me flag is set to 1 for transactions that were created by the wallet
      * on this bitcoin node, and set to 0 for transactions that were created
      * externally and came in through the network or sendrawtransaction RPC.
      */
     bool fFromMe;
     //! position in ordered transaction list
     int64_t nOrderPos;
     std::multimap<int64_t, CWalletTx *>::const_iterator m_it_wtxOrdered;
 
     // memory only
     enum AmountType {
         DEBIT,
         CREDIT,
         IMMATURE_CREDIT,
         AVAILABLE_CREDIT,
         AMOUNTTYPE_ENUM_ELEMENTS
     };
     Amount GetCachableAmount(AmountType type, const isminefilter &filter,
                              bool recalculate = false) const;
     mutable CachableAmount m_amounts[AMOUNTTYPE_ENUM_ELEMENTS];
     /**
      * This flag is true if all m_amounts caches are empty. This is particularly
      * useful in places where MarkDirty is conditionally called and the
      * condition can be expensive and thus can be skipped if the flag is true.
      * See MarkDestinationsDirty.
      */
     mutable bool m_is_cache_empty{true};
     mutable bool fChangeCached;
     mutable bool fInMempool;
     mutable Amount nChangeCached;
 
     CWalletTx(const CWallet *pwalletIn, CTransactionRef arg)
         : tx(std::move(arg)) {
         Init(pwalletIn);
     }
 
     void Init(const CWallet *pwalletIn) {
         pwallet = pwalletIn;
         mapValue.clear();
         vOrderForm.clear();
         fTimeReceivedIsTxTime = false;
         nTimeReceived = 0;
         nTimeSmart = 0;
         fFromMe = false;
         fChangeCached = false;
         fInMempool = false;
         nChangeCached = Amount::zero();
         nOrderPos = -1;
         m_confirm = Confirmation{};
     }
 
     CTransactionRef tx;
 
     /**
      * New transactions start as UNCONFIRMED. At BlockConnected,
      * they will transition to CONFIRMED. In case of reorg, at
      * BlockDisconnected, they roll back to UNCONFIRMED. If we detect a
      * conflicting transaction at block connection, we update conflicted tx and
      * its dependencies as CONFLICTED. If tx isn't confirmed and outside of
      * mempool, the user may switch it to ABANDONED by using the
      * abandontransaction call. This last status may be override by a CONFLICTED
      * or CONFIRMED transition.
      */
     enum Status { UNCONFIRMED, CONFIRMED, CONFLICTED, ABANDONED };
 
     /**
      * Confirmation includes tx status and a triplet of {block height/block
      * hash/tx index in block} at which tx has been confirmed. All three are set
      * to 0 if tx is unconfirmed or abandoned. Meaning of these fields changes
      * with CONFLICTED state where they instead point to block hash and block
      * height of the deepest conflicting tx.
      */
     struct Confirmation {
         Status status;
         int block_height;
         BlockHash hashBlock;
         int nIndex;
         Confirmation(Status s = UNCONFIRMED, int b = 0,
                      BlockHash h = BlockHash(), int i = 0)
             : status(s), block_height(b), hashBlock(h), nIndex(i) {}
     };
 
     Confirmation m_confirm;
 
     template <typename Stream> void Serialize(Stream &s) const {
         mapValue_t mapValueCopy = mapValue;
 
         mapValueCopy["fromaccount"] = "";
         WriteOrderPos(nOrderPos, mapValueCopy);
         if (nTimeSmart) {
             mapValueCopy["timesmart"] = strprintf("%u", nTimeSmart);
         }
 
         //! Used to be vMerkleBranch
         std::vector<char> dummy_vector1;
         //! Used to be vtxPrev
         std::vector<char> dummy_vector2;
         //! Used to be fSpent
         bool dummy_bool = false;
         uint256 serializedHash =
             isAbandoned() ? ABANDON_HASH : m_confirm.hashBlock;
         int serializedIndex =
             isAbandoned() || isConflicted() ? -1 : m_confirm.nIndex;
         s << tx << serializedHash << dummy_vector1 << serializedIndex
           << dummy_vector2 << mapValueCopy << vOrderForm
           << fTimeReceivedIsTxTime << nTimeReceived << fFromMe << dummy_bool;
     }
 
     template <typename Stream> void Unserialize(Stream &s) {
         Init(nullptr);
 
         //! Used to be vMerkleBranch
         std::vector<uint256> dummy_vector1;
         //! Used to be vtxPrev
         std::vector<CMerkleTx> dummy_vector2;
         //! Used to be fSpent
         bool dummy_bool;
         int serializedIndex;
         s >> tx >> m_confirm.hashBlock >> dummy_vector1 >> serializedIndex >>
             dummy_vector2 >> mapValue >> vOrderForm >> fTimeReceivedIsTxTime >>
             nTimeReceived >> fFromMe >> dummy_bool;
 
         /*
          * At serialization/deserialization, an nIndex == -1 means that
          * hashBlock refers to the earliest block in the chain we know this or
          * any in-wallet ancestor conflicts with. If nIndex == -1 and hashBlock
          * is ABANDON_HASH, it means transaction is abandoned. In same context,
          * an nIndex >= 0 refers to a confirmed transaction (if hashBlock set)
          * or unconfirmed one. Older clients interpret nIndex == -1 as
          * unconfirmed for backward compatibility (pre-commit 9ac63d6).
          */
         if (serializedIndex == -1 && m_confirm.hashBlock == ABANDON_HASH) {
             setAbandoned();
         } else if (serializedIndex == -1) {
             setConflicted();
         } else if (!m_confirm.hashBlock.IsNull()) {
             m_confirm.nIndex = serializedIndex;
             setConfirmed();
         }
 
         ReadOrderPos(nOrderPos, mapValue);
         nTimeSmart = mapValue.count("timesmart")
                          ? (unsigned int)atoi64(mapValue["timesmart"])
                          : 0;
 
         mapValue.erase("fromaccount");
         mapValue.erase("spent");
         mapValue.erase("n");
         mapValue.erase("timesmart");
     }
 
     void SetTx(CTransactionRef arg) { tx = std::move(arg); }
 
     //! make sure balances are recalculated
     void MarkDirty() {
         m_amounts[DEBIT].Reset();
         m_amounts[CREDIT].Reset();
         m_amounts[IMMATURE_CREDIT].Reset();
         m_amounts[AVAILABLE_CREDIT].Reset();
         fChangeCached = false;
         m_is_cache_empty = true;
     }
 
     void BindWallet(CWallet *pwalletIn) {
         pwallet = pwalletIn;
         MarkDirty();
     }
 
     //! filter decides which addresses will count towards the debit
     Amount GetDebit(const isminefilter &filter) const;
     Amount GetCredit(const isminefilter &filter) const;
     Amount GetImmatureCredit(bool fUseCache = true) const;
     // TODO: Remove "NO_THREAD_SAFETY_ANALYSIS" and replace it with the correct
     // annotation "EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)". The
     // annotation "NO_THREAD_SAFETY_ANALYSIS" was temporarily added to avoid
     // having to resolve the issue of member access into incomplete type
     // CWallet.
     Amount GetAvailableCredit(bool fUseCache = true,
                               const isminefilter &filter = ISMINE_SPENDABLE)
         const NO_THREAD_SAFETY_ANALYSIS;
     Amount GetImmatureWatchOnlyCredit(const bool fUseCache = true) const;
     Amount GetChange() const;
 
     // Get the marginal bytes if spending the specified output from this
     // transaction
     int GetSpendSize(unsigned int out, bool use_max_sig = false) const {
         return CalculateMaximumSignedInputSize(tx->vout[out], pwallet,
                                                use_max_sig);
     }
 
     void GetAmounts(std::list<COutputEntry> &listReceived,
                     std::list<COutputEntry> &listSent, Amount &nFee,
                     const isminefilter &filter) const;
 
     bool IsFromMe(const isminefilter &filter) const {
         return GetDebit(filter) > Amount::zero();
     }
 
     // True if only scriptSigs are different
     bool IsEquivalentTo(const CWalletTx &tx) const;
 
     bool InMempool() const;
     bool IsTrusted() const;
     bool IsTrusted(std::set<TxId> &trusted_parents) const;
 
     int64_t GetTxTime() const;
 
     // Pass this transaction to node for mempool insertion and relay to peers if
     // flag set to true
     bool SubmitMemoryPoolAndRelay(std::string &err_string, bool relay);
 
     // TODO: Remove "NO_THREAD_SAFETY_ANALYSIS" and replace it with the correct
     // annotation "EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)". The annotation
     // "NO_THREAD_SAFETY_ANALYSIS" was temporarily added to avoid having to
     // resolve the issue of member access into incomplete type CWallet. Note
     // that we still have the runtime check "AssertLockHeld(pwallet->cs_wallet)"
     // in place.
     std::set<TxId> GetConflicts() const NO_THREAD_SAFETY_ANALYSIS;
 
     /**
      * Return depth of transaction in blockchain:
      * <0  : conflicts with a transaction this deep in the blockchain
      *  0  : in memory pool, waiting to be included in a block
      * >=1 : this many blocks deep in the main chain
      */
     // TODO: Remove "NO_THREAD_SAFETY_ANALYSIS" and replace it with the correct
     // annotation "EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)". The annotation
     // "NO_THREAD_SAFETY_ANALYSIS" was temporarily added to avoid having to
     // resolve the issue of member access into incomplete type CWallet. Note
     // that we still have the runtime check "AssertLockHeld(pwallet->cs_wallet)"
     // in place.
     int GetDepthInMainChain() const NO_THREAD_SAFETY_ANALYSIS;
     bool IsInMainChain() const { return GetDepthInMainChain() > 0; }
 
     /**
      * @return number of blocks to maturity for this transaction:
      *  0 : is not a coinbase transaction, or is a mature coinbase transaction
      * >0 : is a coinbase transaction which matures in this many blocks
      */
     int GetBlocksToMaturity() const;
     bool isAbandoned() const {
         return m_confirm.status == CWalletTx::ABANDONED;
     }
     void setAbandoned() {
         m_confirm.status = CWalletTx::ABANDONED;
         m_confirm.hashBlock = BlockHash();
         m_confirm.block_height = 0;
         m_confirm.nIndex = 0;
     }
     bool isConflicted() const {
         return m_confirm.status == CWalletTx::CONFLICTED;
     }
     void setConflicted() { m_confirm.status = CWalletTx::CONFLICTED; }
     bool isUnconfirmed() const {
         return m_confirm.status == CWalletTx::UNCONFIRMED;
     }
     void setUnconfirmed() { m_confirm.status = CWalletTx::UNCONFIRMED; }
     bool isConfirmed() const {
         return m_confirm.status == CWalletTx::CONFIRMED;
     }
     void setConfirmed() { m_confirm.status = CWalletTx::CONFIRMED; }
     TxId GetId() const { return tx->GetId(); }
     bool IsCoinBase() const { return tx->IsCoinBase(); }
     bool IsImmatureCoinBase() const;
 };
 
 class COutput {
 public:
     const CWalletTx *tx;
     int i;
     int nDepth;
 
     /**
      * Pre-computed estimated size of this output as a fully-signed input in a
      * transaction. Can be -1 if it could not be calculated.
      */
     int nInputBytes;
 
     /** Whether we have the private keys to spend this output */
     bool fSpendable;
 
     /** Whether we know how to spend this output, ignoring the lack of keys */
     bool fSolvable;
 
     /**
      * Whether to use the maximum sized, 72 byte signature when calculating the
      * size of the input spend. This should only be set when watch-only outputs
      * are allowed.
      */
     bool use_max_sig;
 
     /**
      * Whether this output is considered safe to spend. Unconfirmed transactions
      * from outside keys are considered unsafe and will not be used to fund new
      * spending transactions.
      */
     bool fSafe;
 
     COutput(const CWalletTx *txIn, int iIn, int nDepthIn, bool fSpendableIn,
             bool fSolvableIn, bool fSafeIn, bool use_max_sig_in = false) {
         tx = txIn;
         i = iIn;
         nDepth = nDepthIn;
         fSpendable = fSpendableIn;
         fSolvable = fSolvableIn;
         fSafe = fSafeIn;
         nInputBytes = -1;
         use_max_sig = use_max_sig_in;
         // If known and signable by the given wallet, compute nInputBytes
         // Failure will keep this value -1
         if (fSpendable && tx) {
             nInputBytes = tx->GetSpendSize(i, use_max_sig);
         }
     }
 
     std::string ToString() const;
 
     inline CInputCoin GetInputCoin() const {
         return CInputCoin(tx->tx, i, nInputBytes);
     }
 };
 
 struct CoinSelectionParams {
     bool use_bnb = true;
     size_t change_output_size = 0;
     size_t change_spend_size = 0;
     CFeeRate effective_fee = CFeeRate(Amount::zero());
     size_t tx_noinputs_size = 0;
     //! Indicate that we are subtracting the fee from outputs
     bool m_subtract_fee_outputs = false;
 
     CoinSelectionParams(bool use_bnb_, size_t change_output_size_,
                         size_t change_spend_size_, CFeeRate effective_fee_,
                         size_t tx_noinputs_size_)
         : use_bnb(use_bnb_), change_output_size(change_output_size_),
           change_spend_size(change_spend_size_), effective_fee(effective_fee_),
           tx_noinputs_size(tx_noinputs_size_) {}
     CoinSelectionParams() {}
 };
 
 // forward declarations for ScanForWalletTransactions/RescanFromTime
 class WalletRescanReserver;
 
 /**
  * A CWallet maintains a set of transactions and balances, and provides the
  * ability to create new transactions.
  */
 class CWallet final : public WalletStorage,
                       public interfaces::Chain::Notifications {
 private:
     CKeyingMaterial vMasterKey GUARDED_BY(cs_wallet);
 
     bool Unlock(const CKeyingMaterial &vMasterKeyIn,
                 bool accept_no_keys = false);
 
     std::atomic<bool> fAbortRescan{false};
     // controlled by WalletRescanReserver
     std::atomic<bool> fScanningWallet{false};
     std::atomic<int64_t> m_scanning_start{0};
     std::atomic<double> m_scanning_progress{0};
     friend class WalletRescanReserver;
 
     //! the current wallet version: clients below this version are not able to
     //! load the wallet
     int nWalletVersion GUARDED_BY(cs_wallet) = FEATURE_BASE;
 
     //! the maximum wallet format version: memory-only variable that specifies
     //! to what version this wallet may be upgraded
     int nWalletMaxVersion GUARDED_BY(cs_wallet) = FEATURE_BASE;
 
     int64_t nNextResend = 0;
     int64_t nLastResend = 0;
     bool fBroadcastTransactions = false;
     // Local time that the tip block was received. Used to schedule wallet
     // rebroadcasts.
     std::atomic<int64_t> m_best_block_time{0};
 
     /**
      * Used to keep track of spent outpoints, and detect and report conflicts
      * (double-spends or mutated transactions where the mutant gets mined).
      */
     typedef std::multimap<COutPoint, TxId> TxSpends;
     TxSpends mapTxSpends GUARDED_BY(cs_wallet);
     void AddToSpends(const COutPoint &outpoint, const TxId &wtxid)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void AddToSpends(const TxId &wtxid) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /**
      * Add a transaction to the wallet, or update it. pIndex and posInBlock
      * should be set when the transaction was known to be included in a
      * block. When *pIndex == nullptr, then wallet state is not updated in
      * AddToWallet, but notifications happen and cached balances are marked
      * dirty.
      *
      * If fUpdate is true, existing transactions will be updated.
      * TODO: One exception to this is that the abandoned state is cleared under
      * the assumption that any further notification of a transaction that was
      * considered abandoned is an indication that it is not safe to be
      * considered abandoned. Abandoned state should probably be more carefully
      * tracked via different posInBlock signals or by checking mempool presence
      * when necessary.
      */
     bool AddToWalletIfInvolvingMe(const CTransactionRef &tx,
                                   CWalletTx::Confirmation confirm, bool fUpdate)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /**
      * Mark a transaction (and its in-wallet descendants) as conflicting with a
      * particular block.
      */
     void MarkConflicted(const BlockHash &hashBlock, int conflicting_height,
                         const TxId &txid);
 
     /**
      * Mark a transaction's inputs dirty, thus forcing the outputs to be
      * recomputed
      */
     void MarkInputsDirty(const CTransactionRef &tx)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     void SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator>)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /**
      * Used by
      * TransactionAddedToMemorypool/BlockConnected/Disconnected/ScanForWalletTransactions.
      * Should be called with non-zero block_hash and posInBlock if this is for a
      * transaction that is included in a block.
      */
     void SyncTransaction(const CTransactionRef &tx,
                          CWalletTx::Confirmation confirm, bool update_tx = true)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     std::atomic<uint64_t> m_wallet_flags{0};
 
     bool SetAddressBookWithDB(WalletBatch &batch, const CTxDestination &address,
                               const std::string &strName,
                               const std::string &strPurpose);
 
     //! Unsets a wallet flag and saves it to disk
     void UnsetWalletFlagWithDB(WalletBatch &batch, uint64_t flag);
 
     //! Unset the blank wallet flag and saves it to disk
     void UnsetBlankWalletFlag(WalletBatch &batch) override;
 
     /** Interface for accessing chain state. */
     interfaces::Chain *m_chain;
 
     /**
      * Wallet location which includes wallet name (see WalletLocation).
      */
     WalletLocation m_location;
 
     /** Internal database handle. */
     std::unique_ptr<WalletDatabase> database;
 
     /**
      * The following is used to keep track of how far behind the wallet is
      * from the chain sync, and to allow clients to block on us being caught up.
      *
      * Processed hash is a pointer on node's tip and doesn't imply that the
      * wallet has scanned sequentially all blocks up to this one.
      */
     BlockHash m_last_block_processed GUARDED_BY(cs_wallet);
 
     /* Height of last block processed is used by wallet to know depth of
      * transactions without relying on Chain interface beyond asynchronous
      * updates. For safety, we initialize it to -1. Height is a pointer on
      * node's tip and doesn't imply that the wallet has scanned sequentially all
      * blocks up to this one.
      */
     int m_last_block_processed_height GUARDED_BY(cs_wallet) = -1;
 
     bool CreateTransactionInternal(const std::vector<CRecipient> &vecSend,
                                    CTransactionRef &tx, Amount &nFeeRet,
                                    int &nChangePosInOut, bilingual_str &error,
                                    const CCoinControl &coin_control, bool sign);
 
     std::map<OutputType, ScriptPubKeyMan *> m_external_spk_managers;
     std::map<OutputType, ScriptPubKeyMan *> m_internal_spk_managers;
 
     // Indexed by a unique identifier produced by each ScriptPubKeyMan using
     // ScriptPubKeyMan::GetID. In many cases it will be the hash of an internal
     // structure
     std::map<uint256, std::unique_ptr<ScriptPubKeyMan>> m_spk_managers;
 
 public:
     const CChainParams &chainParams;
     /*
      * Main wallet lock.
      * This lock protects all the fields added by CWallet.
      */
     mutable RecursiveMutex cs_wallet;
 
     /**
      * Get database handle used by this wallet. Ideally this function would not
      * be necessary.
      */
     WalletDatabase &GetDBHandle() { return *database; }
     WalletDatabase &GetDatabase() override { return *database; }
 
     /**
      * Select a set of coins such that nValueRet >= nTargetValue and at least
      * all coins from coinControl are selected; Never select unconfirmed coins
      * if they are not ours.
      */
     bool SelectCoins(const std::vector<COutput> &vAvailableCoins,
                      const Amount nTargetValue,
                      std::set<CInputCoin> &setCoinsRet, Amount &nValueRet,
                      const CCoinControl &coin_control,
                      CoinSelectionParams &coin_selection_params,
                      bool &bnb_used) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     const WalletLocation &GetLocation() const { return m_location; }
 
     /**
      * Get a name for this wallet for logging/debugging purposes.
      */
     const std::string &GetName() const { return m_location.GetName(); }
 
     typedef std::map<unsigned int, CMasterKey> MasterKeyMap;
     MasterKeyMap mapMasterKeys;
     unsigned int nMasterKeyMaxID = 0;
 
     /** Construct wallet with specified name and database implementation. */
     CWallet(const CChainParams &chainParamsIn, interfaces::Chain *chain,
             const WalletLocation &location,
             std::unique_ptr<WalletDatabase> _database)
         : m_chain(chain), m_location(location), database(std::move(_database)),
           chainParams(chainParamsIn) {}
 
     ~CWallet() {
         // Should not have slots connected at this point.
         assert(NotifyUnload.empty());
     }
 
+    /* Returns the chain params used by this wallet. */
+    const CChainParams &GetChainParams() const override { return chainParams; }
+
     bool IsCrypted() const;
     bool IsLocked() const override;
     bool Lock();
 
     /** Interface to assert chain access */
     bool HaveChain() const { return m_chain ? true : false; }
 
     std::map<TxId, CWalletTx> mapWallet GUARDED_BY(cs_wallet);
 
     typedef std::multimap<int64_t, CWalletTx *> TxItems;
     TxItems wtxOrdered;
 
     int64_t nOrderPosNext GUARDED_BY(cs_wallet) = 0;
     uint64_t nAccountingEntryNumber = 0;
 
     std::map<CTxDestination, CAddressBookData>
         m_address_book GUARDED_BY(cs_wallet);
     const CAddressBookData *
     FindAddressBookEntry(const CTxDestination &,
                          bool allow_change = false) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     std::set<COutPoint> setLockedCoins GUARDED_BY(cs_wallet);
 
     /** Registered interfaces::Chain::Notifications handler. */
     std::unique_ptr<interfaces::Handler> m_chain_notifications_handler;
 
     /** Interface for accessing chain state. */
     interfaces::Chain &chain() const {
         assert(m_chain);
         return *m_chain;
     }
 
     const CWalletTx *GetWalletTx(const TxId &txid) const;
 
     //! check whether we are allowed to upgrade (or already support) to the
     //! named feature
     bool CanSupportFeature(enum WalletFeature wf) const override
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) {
         AssertLockHeld(cs_wallet);
         return nWalletMaxVersion >= wf;
     }
 
     /**
      * populate vCoins with vector of available COutputs.
      */
     void AvailableCoins(std::vector<COutput> &vCoins, bool fOnlySafe = true,
                         const CCoinControl *coinControl = nullptr,
                         const Amount nMinimumAmount = SATOSHI,
                         const Amount nMaximumAmount = MAX_MONEY,
                         const Amount nMinimumSumAmount = MAX_MONEY,
                         const uint64_t nMaximumCount = 0) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /**
      * Return list of available coins and locked coins grouped by non-change
      * output address.
      */
     std::map<CTxDestination, std::vector<COutput>> ListCoins() const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /**
      * Find non-change parent output.
      */
     const CTxOut &FindNonChangeParentOutput(const CTransaction &tx,
                                             int output) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /**
      * Shuffle and select coins until nTargetValue is reached while avoiding
      * small change; This method is stochastic for some inputs and upon
      * completion the coin set and corresponding actual target value is
      * assembled.
      */
     bool SelectCoinsMinConf(const Amount nTargetValue,
                             const CoinEligibilityFilter &eligibility_filter,
                             std::vector<OutputGroup> groups,
                             std::set<CInputCoin> &setCoinsRet,
                             Amount &nValueRet,
                             const CoinSelectionParams &coin_selection_params,
                             bool &bnb_used) const;
 
     bool IsSpent(const COutPoint &outpoint) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     // Whether this or any UTXO with the same CTxDestination has been spent.
     bool IsUsedDestination(const TxId &txid, unsigned int n) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void SetUsedDestinationState(WalletBatch &batch, const TxId &txid,
                                  unsigned int n, bool used,
                                  std::set<CTxDestination> &tx_destinations)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     std::vector<OutputGroup> GroupOutputs(const std::vector<COutput> &outputs,
                                           bool single_coin,
                                           const size_t max_ancestors) const;
 
     bool IsLockedCoin(const COutPoint &outpoint) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void LockCoin(const COutPoint &output) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void UnlockCoin(const COutPoint &output)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void UnlockAllCoins() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void ListLockedCoins(std::vector<COutPoint> &vOutpts) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /*
      * Rescan abort properties
      */
     void AbortRescan() { fAbortRescan = true; }
     bool IsAbortingRescan() const { return fAbortRescan; }
     bool IsScanning() const { return fScanningWallet; }
     int64_t ScanningDuration() const {
         return fScanningWallet ? GetTimeMillis() - m_scanning_start : 0;
     }
     double ScanningProgress() const {
         return fScanningWallet ? double(m_scanning_progress) : 0;
     }
 
     //! Upgrade stored CKeyMetadata objects to store key origin info as
     //! KeyOriginInfo
     void UpgradeKeyMetadata() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     bool LoadMinVersion(int nVersion) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) {
         AssertLockHeld(cs_wallet);
         nWalletVersion = nVersion;
         nWalletMaxVersion = std::max(nWalletMaxVersion, nVersion);
         return true;
     }
 
     /**
      * Adds a destination data tuple to the store, and saves it to disk
      * When adding new fields, take care to consider how DelAddressBook should
      * handle it!
      */
     bool AddDestData(WalletBatch &batch, const CTxDestination &dest,
                      const std::string &key, const std::string &value)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     //! Erases a destination data tuple in the store and on disk
     bool EraseDestData(WalletBatch &batch, const CTxDestination &dest,
                        const std::string &key)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     //! Adds a destination data tuple to the store, without saving it to disk
     void LoadDestData(const CTxDestination &dest, const std::string &key,
                       const std::string &value)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     //! Look up a destination data tuple in the store, return true if found
     //! false otherwise
     bool GetDestData(const CTxDestination &dest, const std::string &key,
                      std::string *value) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     //! Get all destination values matching a prefix.
     std::vector<std::string> GetDestValues(const std::string &prefix) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     //! Holds a timestamp at which point the wallet is scheduled (externally) to
     //! be relocked. Caller must arrange for actual relocking to occur via
     //! Lock().
     int64_t nRelockTime = 0;
 
     bool Unlock(const SecureString &strWalletPassphrase,
                 bool accept_no_keys = false);
     bool ChangeWalletPassphrase(const SecureString &strOldWalletPassphrase,
                                 const SecureString &strNewWalletPassphrase);
     bool EncryptWallet(const SecureString &strWalletPassphrase);
 
     void GetKeyBirthTimes(std::map<CKeyID, int64_t> &mapKeyBirth) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     unsigned int ComputeTimeSmart(const CWalletTx &wtx) const;
 
     /**
      * Increment the next transaction order id
      * @return next transaction order id
      */
     int64_t IncOrderPosNext(WalletBatch *batch = nullptr)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     DBErrors ReorderTransactions();
 
     void MarkDirty();
     bool AddToWallet(const CWalletTx &wtxIn, bool fFlushOnClose = true);
     void LoadToWallet(CWalletTx &wtxIn) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void transactionAddedToMempool(const CTransactionRef &tx) override;
     void blockConnected(const CBlock &block,
                         const std::vector<CTransactionRef> &vtxConflicted,
                         int height) override;
     void blockDisconnected(const CBlock &block, int height) override;
     void updatedBlockTip() override;
     int64_t RescanFromTime(int64_t startTime,
                            const WalletRescanReserver &reserver, bool update);
 
     struct ScanResult {
         enum { SUCCESS, FAILURE, USER_ABORT } status = SUCCESS;
 
         //! Hash and height of most recent block that was successfully scanned.
         //! Unset if no blocks were scanned due to read errors or the chain
         //! being empty.
         BlockHash last_scanned_block;
         Optional<int> last_scanned_height;
 
         //! Hash of the most recent block that could not be scanned due to
         //! read errors or pruning. Will be set if status is FAILURE, unset if
         //! status is SUCCESS, and may or may not be set if status is
         //! USER_ABORT.
         BlockHash last_failed_block;
     };
     ScanResult ScanForWalletTransactions(const BlockHash &start_block,
                                          int start_height,
                                          Optional<int> max_height,
                                          const WalletRescanReserver &reserver,
                                          bool fUpdate);
     void transactionRemovedFromMempool(const CTransactionRef &ptx) override;
     void ReacceptWalletTransactions() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     void ResendWalletTransactions();
     struct Balance {
         //! Trusted, at depth=GetBalance.min_depth or more
         Amount m_mine_trusted{Amount::zero()};
         //! Untrusted, but in mempool (pending)
         Amount m_mine_untrusted_pending{Amount::zero()};
         //! Immature coinbases in the main chain
         Amount m_mine_immature{Amount::zero()};
         Amount m_watchonly_trusted{Amount::zero()};
         Amount m_watchonly_untrusted_pending{Amount::zero()};
         Amount m_watchonly_immature{Amount::zero()};
     };
     Balance GetBalance(int min_depth = 0, bool avoid_reuse = true) const;
     Amount GetAvailableBalance(const CCoinControl *coinControl = nullptr) const;
 
     OutputType TransactionChangeType(OutputType change_type,
                                      const std::vector<CRecipient> &vecSend);
 
     /**
      * Insert additional inputs into the transaction by calling
      * CreateTransaction();
      */
     bool FundTransaction(CMutableTransaction &tx, Amount &nFeeRet,
                          int &nChangePosInOut, bilingual_str &error,
                          bool lockUnspents,
                          const std::set<int> &setSubtractFeeFromOutputs,
                          CCoinControl coinControl);
     // Fetch the inputs and sign with SIGHASH_ALL.
     bool SignTransaction(CMutableTransaction &tx) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     // Sign the tx given the input coins and sighash.
     bool SignTransaction(CMutableTransaction &tx,
                          const std::map<COutPoint, Coin> &coins,
                          SigHashType sighash,
                          std::map<int, std::string> &input_errors) const;
     SigningResult SignMessage(const std::string &message, const PKHash &pkhash,
                               std::string &str_sig) const;
 
     /**
      * Fills out a PSBT with information from the wallet. Fills in UTXOs if we
      * have them. Tries to sign if sign=true. Sets `complete` if the PSBT is now
      * complete (i.e. has all required signatures or signature-parts, and is
      * ready to finalize.) Sets `error` and returns false if something goes
      * wrong.
      *
      * @param[in]  psbtx PartiallySignedTransaction to fill in
      * @param[out] complete indicates whether the PSBT is now complete
      * @param[in]  sighash_type the sighash type to use when signing (if PSBT
      * does not specify)
      * @param[in]  sign whether to sign or not
      * @param[in]  bip32derivs whether to fill in bip32 derivation information
      * if available return error
      */
     TransactionError
     FillPSBT(PartiallySignedTransaction &psbtx, bool &complete,
              SigHashType sighash_type = SigHashType().withForkId(),
              bool sign = true, bool bip32derivs = true) const;
 
     /**
      * Create a new transaction paying the recipients with a set of coins
      * selected by SelectCoins(); Also create the change output, when needed
      * @note passing nChangePosInOut as -1 will result in setting a random
      * position
      */
     bool CreateTransaction(const std::vector<CRecipient> &vecSend,
                            CTransactionRef &tx, Amount &nFeeRet,
                            int &nChangePosInOut, bilingual_str &error,
                            const CCoinControl &coin_control, bool sign = true);
 
     /**
      * Submit the transaction to the node's mempool and then relay to peers.
      * Should be called after CreateTransaction unless you want to abort
      * broadcasting the transaction.
      *
      * @param tx[in] The transaction to be broadcast.
      * @param mapValue[in] key-values to be set on the transaction.
      * @param orderForm[in] BIP 70 / BIP 21 order form details to be set on the
      * transaction.
      */
     void CommitTransaction(
         CTransactionRef tx, mapValue_t mapValue,
         std::vector<std::pair<std::string, std::string>> orderForm);
 
     bool DummySignTx(CMutableTransaction &txNew, const std::set<CTxOut> &txouts,
                      bool use_max_sig = false) const {
         std::vector<CTxOut> v_txouts(txouts.size());
         std::copy(txouts.begin(), txouts.end(), v_txouts.begin());
         return DummySignTx(txNew, v_txouts, use_max_sig);
     }
     bool DummySignTx(CMutableTransaction &txNew,
                      const std::vector<CTxOut> &txouts,
                      bool use_max_sig = false) const;
     bool DummySignInput(CTxIn &tx_in, const CTxOut &txout,
                         bool use_max_sig = false) const;
 
     bool ImportScripts(const std::set<CScript> scripts, int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool ImportPrivKeys(const std::map<CKeyID, CKey> &privkey_map,
                         const int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool ImportPubKeys(
         const std::vector<CKeyID> &ordered_pubkeys,
         const std::map<CKeyID, CPubKey> &pubkey_map,
         const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>> &key_origins,
         const bool add_keypool, const bool internal, const int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool ImportScriptPubKeys(const std::string &label,
                              const std::set<CScript> &script_pub_keys,
                              const bool have_solving_data,
                              const bool apply_label, const int64_t timestamp)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     CFeeRate m_pay_tx_fee{DEFAULT_PAY_TX_FEE};
     bool m_spend_zero_conf_change{DEFAULT_SPEND_ZEROCONF_CHANGE};
     //! will be false if -fallbackfee=0
     bool m_allow_fallback_fee{true};
     // Override with -mintxfee
     CFeeRate m_min_fee{DEFAULT_TRANSACTION_MINFEE_PER_KB};
     /**
      * If fee estimation does not have enough data to provide estimates, use
      * this fee instead. Has no effect if not using fee estimation Override with
      * -fallbackfee
      */
     CFeeRate m_fallback_fee{DEFAULT_FALLBACK_FEE};
     //! note: this is absolute fee, not fee rate
     Amount m_max_aps_fee{DEFAULT_MAX_AVOIDPARTIALSPEND_FEE};
     OutputType m_default_address_type{DEFAULT_ADDRESS_TYPE};
     OutputType m_default_change_type{DEFAULT_CHANGE_TYPE};
     /**
      * Absolute maximum transaction fee (in satoshis) used by default for the
      * wallet.
      */
     Amount m_default_max_tx_fee{DEFAULT_TRANSACTION_MAXFEE};
 
     size_t KeypoolCountExternalKeys() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool TopUpKeyPool(unsigned int kpSize = 0);
 
     int64_t GetOldestKeyPoolTime() const;
 
     std::set<std::set<CTxDestination>> GetAddressGroupings() const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     std::map<CTxDestination, Amount> GetAddressBalances() const;
 
     std::set<CTxDestination> GetLabelAddresses(const std::string &label) const;
 
     /**
      * Marks all outputs in each one of the destinations dirty, so their cache
      * is reset and does not return outdated information.
      */
     void MarkDestinationsDirty(const std::set<CTxDestination> &destinations)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     bool GetNewDestination(const OutputType type, const std::string label,
                            CTxDestination &dest, std::string &error);
     bool GetNewChangeDestination(const OutputType type, CTxDestination &dest,
                                  std::string &error);
 
     isminetype IsMine(const CTxDestination &dest) const;
     isminetype IsMine(const CScript &script) const;
     isminetype IsMine(const CTxIn &txin) const;
     /**
      * Returns amount of debit if the input matches the filter, otherwise
      * returns 0
      */
     Amount GetDebit(const CTxIn &txin, const isminefilter &filter) const;
     isminetype IsMine(const CTxOut &txout) const;
     Amount GetCredit(const CTxOut &txout, const isminefilter &filter) const;
     bool IsChange(const CTxOut &txout) const;
     bool IsChange(const CScript &script) const;
     Amount GetChange(const CTxOut &txout) const;
     bool IsMine(const CTransaction &tx) const;
     /** should probably be renamed to IsRelevantToMe */
     bool IsFromMe(const CTransaction &tx) const;
     Amount GetDebit(const CTransaction &tx, const isminefilter &filter) const;
     /** Returns whether all of the inputs match the filter */
     bool IsAllFromMe(const CTransaction &tx, const isminefilter &filter) const;
     Amount GetCredit(const CTransaction &tx, const isminefilter &filter) const;
     Amount GetChange(const CTransaction &tx) const;
     void chainStateFlushed(const CBlockLocator &loc) override;
 
     DBErrors LoadWallet(bool &fFirstRunRet);
     DBErrors ZapWalletTx(std::vector<CWalletTx> &vWtx);
     DBErrors ZapSelectTx(std::vector<TxId> &txIdsIn,
                          std::vector<TxId> &txIdsOut)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     bool SetAddressBook(const CTxDestination &address,
                         const std::string &strName, const std::string &purpose);
 
     bool DelAddressBook(const CTxDestination &address);
 
     unsigned int GetKeyPoolSize() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     //! signify that a particular wallet feature is now used. this may change
     //! nWalletVersion and nWalletMaxVersion if those are lower
     void SetMinVersion(enum WalletFeature, WalletBatch *batch_in = nullptr,
                        bool fExplicit = false) override;
 
     //! change which version we're allowed to upgrade to (note that this does
     //! not immediately imply upgrading to that format)
     bool SetMaxVersion(int nVersion);
 
     //! get the current wallet format (the oldest client version guaranteed to
     //! understand this wallet)
     int GetVersion() const {
         LOCK(cs_wallet);
         return nWalletVersion;
     }
 
     //! Get wallet transactions that conflict with given transaction (spend same
     //! outputs)
     std::set<TxId> GetConflicts(const TxId &txid) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     //! Check if a given transaction has any of its outputs spent by another
     //! transaction in the wallet
     bool HasWalletSpend(const TxId &txid) const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     //! Flush wallet (bitdb flush)
     void Flush(bool shutdown = false);
 
     /** Wallet is about to be unloaded */
     boost::signals2::signal<void()> NotifyUnload;
 
     /**
      * Address book entry changed.
      * @note called with lock cs_wallet held.
      */
     boost::signals2::signal<void(CWallet *wallet, const CTxDestination &address,
                                  const std::string &label, bool isMine,
                                  const std::string &purpose, ChangeType status)>
         NotifyAddressBookChanged;
 
     /**
      * Wallet transaction added, removed or updated.
      * @note called with lock cs_wallet held.
      */
     boost::signals2::signal<void(CWallet *wallet, const TxId &txid,
                                  ChangeType status)>
         NotifyTransactionChanged;
 
     /** Show progress e.g. for rescan */
     boost::signals2::signal<void(const std::string &title, int nProgress)>
         ShowProgress;
 
     /** Watch-only address added */
     boost::signals2::signal<void(bool fHaveWatchOnly)> NotifyWatchonlyChanged;
 
     /** Keypool has new keys */
     boost::signals2::signal<void()> NotifyCanGetAddressesChanged;
 
     /**
      * Wallet status (encrypted, locked) changed.
      * Note: Called without locks held.
      */
     boost::signals2::signal<void(CWallet *wallet)> NotifyStatusChanged;
 
     /** Inquire whether this wallet broadcasts transactions. */
     bool GetBroadcastTransactions() const { return fBroadcastTransactions; }
     /** Set whether this wallet broadcasts transactions. */
     void SetBroadcastTransactions(bool broadcast) {
         fBroadcastTransactions = broadcast;
     }
 
     /** Return whether transaction can be abandoned */
     bool TransactionCanBeAbandoned(const TxId &txid) const;
 
     /**
      * Mark a transaction (and it in-wallet descendants) as abandoned so its
      * inputs may be respent.
      */
     bool AbandonTransaction(const TxId &txid);
 
     //! Verify wallet naming and perform salvage on the wallet if required
     static bool Verify(const CChainParams &chainParams,
                        interfaces::Chain &chain, const WalletLocation &location,
                        bool salvage_wallet, bilingual_str &error_string,
                        std::vector<bilingual_str> &warnings);
 
     /**
      * Initializes the wallet, returns a new CWallet instance or a null pointer
      * in case of an error.
      */
     static std::shared_ptr<CWallet>
     CreateWalletFromFile(const CChainParams &chainParams,
                          interfaces::Chain &chain,
                          const WalletLocation &location, bilingual_str &error,
                          std::vector<bilingual_str> &warnings,
                          uint64_t wallet_creation_flags = 0);
 
     /**
      * Wallet post-init setup
      * Gives the wallet a chance to register repetitive tasks and complete
      * post-init tasks
      */
     void postInitProcess();
 
     bool BackupWallet(const std::string &strDest) const;
 
     /* Returns true if HD is enabled */
     bool IsHDEnabled() const;
 
     /**
      * Returns true if the wallet can give out new addresses. This means it has
      * keys in the keypool or can generate new keys.
      */
     bool CanGetAddresses(bool internal = false) const;
 
     /**
      * Blocks until the wallet state is up-to-date to /at least/ the current
      * chain at the time this function is entered.
      * Obviously holding cs_main/cs_wallet when going into this call may cause
      * deadlock
      */
     void BlockUntilSyncedToCurrentChain() const
         LOCKS_EXCLUDED(cs_main, cs_wallet);
 
     /**
      * Set a single wallet flag.
      */
     void SetWalletFlag(uint64_t flags);
 
     /**
      * Unsets a single wallet flag.
      */
     void UnsetWalletFlag(uint64_t flag);
 
     /**
      * Check if a certain wallet flag is set.
      */
     bool IsWalletFlagSet(uint64_t flag) const override;
 
     /**
      * Overwrite all flags by the given uint64_t.
      * Returns false if unknown, non-tolerable flags are present.
      */
     bool SetWalletFlags(uint64_t overwriteFlags, bool memOnly);
 
     /**
      * Returns a bracketed wallet name for displaying in logs, will return
      * [default wallet] if the wallet has no name.
      */
     const std::string GetDisplayName() const override {
         std::string wallet_name =
             GetName().length() == 0 ? "default wallet" : GetName();
         return strprintf("[%s]", wallet_name);
     };
 
     /**
      * Prepends the wallet name in logging output to ease debugging in
      * multi-wallet use cases.
      */
     template <typename... Params>
     void WalletLogPrintf(std::string fmt, Params... parameters) const {
         LogPrintf(("%s " + fmt).c_str(), GetDisplayName(), parameters...);
     };
 
     template <typename... Params>
     void WalletLogPrintfToBeContinued(std::string fmt,
                                       Params... parameters) const {
         LogPrintfToBeContinued(("%s " + fmt).c_str(), GetDisplayName(),
                                parameters...);
     };
 
     /** Upgrade the wallet */
     bool UpgradeWallet(int version, bilingual_str &error,
                        std::vector<bilingual_str> &warnings);
 
     //! Returns all unique ScriptPubKeyMans in m_internal_spk_managers and
     //! m_external_spk_managers
     std::set<ScriptPubKeyMan *> GetActiveScriptPubKeyMans() const;
 
     //! Returns all unique ScriptPubKeyMans
     std::set<ScriptPubKeyMan *> GetAllScriptPubKeyMans() const;
 
     //! Get the ScriptPubKeyMan for the given OutputType and internal/external
     //! chain.
     ScriptPubKeyMan *GetScriptPubKeyMan(const OutputType &type,
                                         bool internal) const;
 
     //! Get the ScriptPubKeyMan for a script
     ScriptPubKeyMan *GetScriptPubKeyMan(const CScript &script) const;
     //! Get the ScriptPubKeyMan by id
     ScriptPubKeyMan *GetScriptPubKeyMan(const uint256 &id) const;
 
     //! Get all of the ScriptPubKeyMans for a script given additional
     //! information in sigdata (populated by e.g. a psbt)
     std::set<ScriptPubKeyMan *>
     GetScriptPubKeyMans(const CScript &script, SignatureData &sigdata) const;
 
     //! Get the SigningProvider for a script
     std::unique_ptr<SigningProvider>
     GetSolvingProvider(const CScript &script) const;
     std::unique_ptr<SigningProvider>
     GetSolvingProvider(const CScript &script, SignatureData &sigdata) const;
 
     //! Get the LegacyScriptPubKeyMan which is used for all types, internal, and
     //! external.
     LegacyScriptPubKeyMan *GetLegacyScriptPubKeyMan() const;
     LegacyScriptPubKeyMan *GetOrCreateLegacyScriptPubKeyMan();
 
     //! Make a LegacyScriptPubKeyMan and set it for all types, internal, and
     //! external.
     void SetupLegacyScriptPubKeyMan();
 
     const CKeyingMaterial &GetEncryptionKey() const override;
     bool HasEncryptionKeys() const override;
 
     /** Get last block processed height */
     int GetLastBlockHeight() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) {
         AssertLockHeld(cs_wallet);
         assert(m_last_block_processed_height >= 0);
         return m_last_block_processed_height;
     };
     BlockHash GetLastBlockHash() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) {
         AssertLockHeld(cs_wallet);
         assert(m_last_block_processed_height >= 0);
         return m_last_block_processed;
     }
     /** Set last block processed height, currently only use in unit test */
     void SetLastBlockProcessed(int block_height, BlockHash block_hash)
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) {
         AssertLockHeld(cs_wallet);
         m_last_block_processed_height = block_height;
         m_last_block_processed = block_hash;
     };
 
     //! Connect the signals from ScriptPubKeyMans to the signals in CWallet
     void ConnectScriptPubKeyManNotifiers();
 
     //! Instantiate a descriptor ScriptPubKeyMan from the WalletDescriptor and
     //! load it
     void LoadDescriptorScriptPubKeyMan(uint256 id, WalletDescriptor &desc);
 
     //! Sets the active ScriptPubKeyMan for the specified type and internal
     //! @param[in] id The unique id for the ScriptPubKeyMan
     //! @param[in] type The OutputType this ScriptPubKeyMan provides addresses
     //!                 for
     //! @param[in] internal Whether this ScriptPubKeyMan provides change
     //!                     addresses
     //! @param[in] memonly Whether to record this update to the database. Set to
     //!                    true for wallet loading, normally false when actually
     //!                    updating the wallet.
     void SetActiveScriptPubKeyMan(uint256 id, OutputType type, bool internal,
                                   bool memonly = false);
 };
 
 /**
  * Called periodically by the schedule thread. Prompts individual wallets to
  * resend their transactions. Actual rebroadcast schedule is managed by the
  * wallets themselves.
  */
 void MaybeResendWalletTxs();
 
 /** RAII object to check and reserve a wallet rescan */
 class WalletRescanReserver {
 private:
     CWallet &m_wallet;
     bool m_could_reserve;
 
 public:
     explicit WalletRescanReserver(CWallet &w)
         : m_wallet(w), m_could_reserve(false) {}
 
     bool reserve() {
         assert(!m_could_reserve);
         if (m_wallet.fScanningWallet.exchange(true)) {
             return false;
         }
         m_wallet.m_scanning_start = GetTimeMillis();
         m_wallet.m_scanning_progress = 0;
         m_could_reserve = true;
         return true;
     }
 
     bool isReserved() const {
         return (m_could_reserve && m_wallet.fScanningWallet);
     }
 
     ~WalletRescanReserver() {
         if (m_could_reserve) {
             m_wallet.fScanningWallet = false;
         }
     }
 };
 
 // Calculate the size of the transaction assuming all signatures are max size
 // Use DummySignatureCreator, which inserts 71 byte signatures everywhere.
 // NOTE: this requires that all inputs must be in mapWallet (eg the tx should
 // be IsAllFromMe).
 int64_t CalculateMaximumSignedTxSize(const CTransaction &tx,
                                      const CWallet *wallet,
                                      bool use_max_sig = false)
     EXCLUSIVE_LOCKS_REQUIRED(wallet->cs_wallet);
 int64_t CalculateMaximumSignedTxSize(const CTransaction &tx,
                                      const CWallet *wallet,
                                      const std::vector<CTxOut> &txouts,
                                      bool use_max_sig = false);
 
 #endif // BITCOIN_WALLET_WALLET_H