diff --git a/src/index/base.h b/src/index/base.h
--- a/src/index/base.h
+++ b/src/index/base.h
@@ -102,7 +102,7 @@
     /// sync once and only needs to process blocks in the ValidationInterface
     /// queue. If the index is catching up from far behind, this method does
     /// not block and immediately returns false.
-    bool BlockUntilSyncedToCurrentChain();
+    bool BlockUntilSyncedToCurrentChain() const;
 
     void Interrupt();
 
diff --git a/src/index/base.cpp b/src/index/base.cpp
--- a/src/index/base.cpp
+++ b/src/index/base.cpp
@@ -281,7 +281,7 @@
     Commit();
 }
 
-bool BaseIndex::BlockUntilSyncedToCurrentChain() {
+bool BaseIndex::BlockUntilSyncedToCurrentChain() const {
     AssertLockNotHeld(cs_main);
 
     if (!m_synced) {
diff --git a/src/interfaces/wallet.h b/src/interfaces/wallet.h
--- a/src/interfaces/wallet.h
+++ b/src/interfaces/wallet.h
@@ -240,7 +240,7 @@
     virtual bool hdEnabled() = 0;
 
     // Return whether the wallet is blank.
-    virtual bool canGetAddresses() = 0;
+    virtual bool canGetAddresses() const = 0;
 
     // Return whether private keys enabled.
     virtual bool privateKeysDisabled() = 0;
diff --git a/src/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -394,7 +394,9 @@
         OutputType getDefaultAddressType() override {
             return m_wallet->m_default_address_type;
         }
-        bool canGetAddresses() override { return m_wallet->CanGetAddresses(); }
+        bool canGetAddresses() const override {
+            return m_wallet->CanGetAddresses();
+        }
         bool privateKeysDisabled() override {
             return m_wallet->IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS);
         }
diff --git a/src/wallet/db.h b/src/wallet/db.h
--- a/src/wallet/db.h
+++ b/src/wallet/db.h
@@ -178,7 +178,7 @@
     /**
      * Back up the entire database to a file.
      */
-    bool Backup(const std::string &strDest);
+    bool Backup(const std::string &strDest) const;
 
     /**
      * Make sure all changes are flushed to disk.
@@ -219,7 +219,7 @@
      * Only to be used at a low level, application should ideally not care
      * about this.
      */
-    bool IsDummy() { return env == nullptr; }
+    bool IsDummy() const { return env == nullptr; }
 };
 
 /** RAII class that provides access to a Berkeley database */
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -938,7 +938,7 @@
     return BerkeleyBatch::Rewrite(*this, pszSkip);
 }
 
-bool BerkeleyDatabase::Backup(const std::string &strDest) {
+bool BerkeleyDatabase::Backup(const std::string &strDest) const {
     if (IsDummy()) {
         return false;
     }
diff --git a/src/wallet/rpcdump.cpp b/src/wallet/rpcdump.cpp
--- a/src/wallet/rpcdump.cpp
+++ b/src/wallet/rpcdump.cpp
@@ -56,7 +56,7 @@
 
 static bool
 GetWalletAddressesForKey(const Config &config, LegacyScriptPubKeyMan *spk_man,
-                         CWallet *const pwallet, const CKeyID &keyid,
+                         const CWallet *const pwallet, const CKeyID &keyid,
                          std::string &strAddr, std::string &strLabel)
     EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet) {
     bool fLabelFound = false;
@@ -813,7 +813,7 @@
 
 UniValue dumpprivkey(const Config &config, const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -40,7 +40,7 @@
 
 static const std::string WALLET_ENDPOINT_BASE = "/wallet/";
 
-static inline bool GetAvoidReuseFlag(CWallet *const pwallet,
+static inline bool GetAvoidReuseFlag(const CWallet *const pwallet,
                                      const UniValue &param) {
     bool can_avoid_reuse = pwallet->IsWalletFlagSet(WALLET_FLAG_AVOID_REUSE);
     bool avoid_reuse = param.isNull() ? can_avoid_reuse : param.get_bool();
@@ -505,7 +505,7 @@
 static UniValue listaddressgroupings(const Config &config,
                                      const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -567,7 +567,7 @@
 static UniValue signmessage(const Config &config,
                             const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -689,7 +689,7 @@
 static UniValue getreceivedbyaddress(const Config &config,
                                      const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -781,7 +781,7 @@
 static UniValue getbalance(const Config &config,
                            const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -853,7 +853,7 @@
 static UniValue getunconfirmedbalance(const Config &config,
                                       const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -1140,7 +1140,7 @@
     tallyitem() {}
 };
 
-static UniValue ListReceived(const Config &config, CWallet *const pwallet,
+static UniValue ListReceived(const Config &config, const CWallet *const pwallet,
                              const UniValue &params, bool by_label)
     EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet) {
     // Minimum confirmations
@@ -1300,7 +1300,7 @@
 static UniValue listreceivedbyaddress(const Config &config,
                                       const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -1368,7 +1368,7 @@
 static UniValue listreceivedbylabel(const Config &config,
                                     const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -1433,7 +1433,7 @@
  * @param  filter_ismine  The "is mine" filter flags.
  * @param  filter_label   Optional label string to filter incoming transactions.
  */
-static void ListTransactions(CWallet *const pwallet, const CWalletTx &wtx,
+static void ListTransactions(const CWallet *const pwallet, const CWalletTx &wtx,
                              int nMinDepth, bool fLong, UniValue &ret,
                              const isminefilter &filter_ismine,
                              const std::string *filter_label)
@@ -1558,7 +1558,7 @@
 
 UniValue listtransactions(const Config &config, const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -1704,7 +1704,7 @@
 static UniValue listsinceblock(const Config &config,
                                const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -1902,7 +1902,7 @@
 static UniValue gettransaction(const Config &config,
                                const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -2109,7 +2109,7 @@
 static UniValue backupwallet(const Config &config,
                              const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -2648,7 +2648,7 @@
 static UniValue listlockunspent(const Config &config,
                                 const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -2843,7 +2843,7 @@
 static UniValue getwalletinfo(const Config &config,
                               const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -3281,7 +3281,7 @@
 static UniValue listunspent(const Config &config,
                             const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -3773,7 +3773,7 @@
 UniValue signrawtransactionwithwallet(const Config &config,
                                       const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -4064,7 +4064,7 @@
     }
 };
 
-static UniValue DescribeWalletAddress(CWallet *pwallet,
+static UniValue DescribeWalletAddress(const CWallet *const pwallet,
                                       const CTxDestination &dest) {
     UniValue ret(UniValue::VOBJ);
     UniValue detail = DescribeAddress(dest);
@@ -4092,7 +4092,7 @@
 
 UniValue getaddressinfo(const Config &config, const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
@@ -4278,7 +4278,8 @@
 UniValue getaddressesbylabel(const Config &config,
                              const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
+
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
@@ -4339,7 +4340,8 @@
 
 UniValue listlabels(const Config &config, const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
+
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
@@ -4499,7 +4501,7 @@
 static UniValue walletprocesspsbt(const Config &config,
                                   const JSONRPCRequest &request) {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    CWallet *const pwallet = wallet.get();
+    const CWallet *const pwallet = wallet.get();
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
diff --git a/src/wallet/scriptpubkeyman.h b/src/wallet/scriptpubkeyman.h
--- a/src/wallet/scriptpubkeyman.h
+++ b/src/wallet/scriptpubkeyman.h
@@ -217,9 +217,11 @@
     /* 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) { 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) {
@@ -231,9 +233,9 @@
     //! The action to do when the DB needs rewrite
     virtual void RewriteDB() {}
 
-    virtual int64_t GetOldestKeyPoolTime() { return GetTime(); }
+    virtual int64_t GetOldestKeyPoolTime() const { return GetTime(); }
 
-    virtual size_t KeypoolCountExternalKeys() { return 0; }
+    virtual size_t KeypoolCountExternalKeys() const { return 0; }
     virtual unsigned int GetKeyPoolSize() const { return 0; }
 
     virtual int64_t GetTimeFirstKey() const { return 0; }
@@ -435,15 +437,15 @@
 
     void RewriteDB() override;
 
-    int64_t GetOldestKeyPoolTime() override;
-    size_t KeypoolCountExternalKeys() 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) override;
+    bool CanGetAddresses(bool internal = false) const override;
 
     std::unique_ptr<SigningProvider>
     GetSolvingProvider(const CScript &script) const override;
@@ -540,7 +542,7 @@
         EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
 
     /* Returns true if the wallet can generate new keys */
-    bool CanGenerateKeys();
+    bool CanGenerateKeys() const;
 
     /* Generates a new HD seed (will not be activated) */
     CPubKey GenerateNewSeed();
diff --git a/src/wallet/scriptpubkeyman.cpp b/src/wallet/scriptpubkeyman.cpp
--- a/src/wallet/scriptpubkeyman.cpp
+++ b/src/wallet/scriptpubkeyman.cpp
@@ -310,7 +310,7 @@
     return !hdChain.seed_id.IsNull();
 }
 
-bool LegacyScriptPubKeyMan::CanGetAddresses(bool internal) {
+bool LegacyScriptPubKeyMan::CanGetAddresses(bool internal) const {
     LOCK(cs_KeyStore);
     // Check if the keypool has keys
     bool keypool_has_keys;
@@ -392,7 +392,7 @@
     return keypool.nTime;
 }
 
-int64_t LegacyScriptPubKeyMan::GetOldestKeyPoolTime() {
+int64_t LegacyScriptPubKeyMan::GetOldestKeyPoolTime() const {
     LOCK(cs_KeyStore);
 
     WalletBatch batch(m_storage.GetDatabase());
@@ -412,7 +412,7 @@
     return oldestKey;
 }
 
-size_t LegacyScriptPubKeyMan::KeypoolCountExternalKeys() {
+size_t LegacyScriptPubKeyMan::KeypoolCountExternalKeys() const {
     LOCK(cs_KeyStore);
     return setExternalKeyPool.size() + set_pre_split_keypool.size();
 }
@@ -1017,7 +1017,7 @@
     }
 }
 
-bool LegacyScriptPubKeyMan::CanGenerateKeys() {
+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);
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -156,7 +156,7 @@
 class ReserveDestination {
 protected:
     //! The wallet to reserve from
-    CWallet *const pwallet;
+    const CWallet *const pwallet;
     //! The ScriptPubKeyMan to reserve from. Based on type when
     //! GetReservedDestination is called
     ScriptPubKeyMan *m_spk_man{nullptr};
@@ -970,8 +970,8 @@
      * Rescan abort properties
      */
     void AbortRescan() { fAbortRescan = true; }
-    bool IsAbortingRescan() { return fAbortRescan; }
-    bool IsScanning() { return fScanningWallet; }
+    bool IsAbortingRescan() const { return fAbortRescan; }
+    bool IsScanning() const { return fScanningWallet; }
     int64_t ScanningDuration() const {
         return fScanningWallet ? GetTimeMillis() - m_scanning_start : 0;
     }
@@ -1206,14 +1206,14 @@
      */
     Amount m_default_max_tx_fee{DEFAULT_TRANSACTION_MAXFEE};
 
-    size_t KeypoolCountExternalKeys() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+    size_t KeypoolCountExternalKeys() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
     bool TopUpKeyPool(unsigned int kpSize = 0);
 
-    int64_t GetOldestKeyPoolTime();
+    int64_t GetOldestKeyPoolTime() const;
 
-    std::set<std::set<CTxDestination>> GetAddressGroupings()
+    std::set<std::set<CTxDestination>> GetAddressGroupings() const
         EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
-    std::map<CTxDestination, Amount> GetAddressBalances();
+    std::map<CTxDestination, Amount> GetAddressBalances() const;
 
     std::set<CTxDestination> GetLabelAddresses(const std::string &label) const;
 
@@ -1276,7 +1276,7 @@
 
     //! get the current wallet format (the oldest client version guaranteed to
     //! understand this wallet)
-    int GetVersion() {
+    int GetVersion() const {
         LOCK(cs_wallet);
         return nWalletVersion;
     }
@@ -1370,7 +1370,7 @@
      */
     void postInitProcess();
 
-    bool BackupWallet(const std::string &strDest);
+    bool BackupWallet(const std::string &strDest) const;
 
     /* Returns true if HD is enabled */
     bool IsHDEnabled() const;
@@ -1379,7 +1379,7 @@
      * 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);
+    bool CanGetAddresses(bool internal = false) const;
 
     /**
      * Blocks until the wallet state is up-to-date to /at least/ the current
@@ -1387,7 +1387,8 @@
      * Obviously holding cs_main/cs_wallet when going into this call may cause
      * deadlock
      */
-    void BlockUntilSyncedToCurrentChain() LOCKS_EXCLUDED(cs_main, cs_wallet);
+    void BlockUntilSyncedToCurrentChain() const
+        LOCKS_EXCLUDED(cs_main, cs_wallet);
 
     /**
      * Set a single wallet flag.
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -1226,7 +1226,7 @@
     m_best_block_time = GetTime();
 }
 
-void CWallet::BlockUntilSyncedToCurrentChain() {
+void CWallet::BlockUntilSyncedToCurrentChain() const {
     AssertLockNotHeld(cs_wallet);
     // Skip the queue-draining stuff if we know we're caught up with
     // chainActive.Tip(), otherwise put a callback in the validation interface
@@ -1421,7 +1421,7 @@
     return result;
 }
 
-bool CWallet::CanGetAddresses(bool internal) {
+bool CWallet::CanGetAddresses(bool internal) const {
     LOCK(cs_wallet);
     if (m_spk_managers.empty()) {
         return false;
@@ -3614,7 +3614,7 @@
     return WalletBatch(*database).EraseName(address);
 }
 
-size_t CWallet::KeypoolCountExternalKeys() {
+size_t CWallet::KeypoolCountExternalKeys() const {
     AssertLockHeld(cs_wallet);
 
     unsigned int count = 0;
@@ -3677,7 +3677,7 @@
     return true;
 }
 
-int64_t CWallet::GetOldestKeyPoolTime() {
+int64_t CWallet::GetOldestKeyPoolTime() const {
     LOCK(cs_wallet);
     int64_t oldestKey = std::numeric_limits<int64_t>::max();
     for (const auto &spk_man_pair : m_spk_managers) {
@@ -3707,7 +3707,7 @@
     }
 }
 
-std::map<CTxDestination, Amount> CWallet::GetAddressBalances() {
+std::map<CTxDestination, Amount> CWallet::GetAddressBalances() const {
     std::map<CTxDestination, Amount> balances;
 
     LOCK(cs_wallet);
@@ -3752,7 +3752,7 @@
     return balances;
 }
 
-std::set<std::set<CTxDestination>> CWallet::GetAddressGroupings() {
+std::set<std::set<CTxDestination>> CWallet::GetAddressGroupings() const {
     AssertLockHeld(cs_wallet);
     std::set<std::set<CTxDestination>> groupings;
     std::set<CTxDestination> grouping;
@@ -4624,7 +4624,7 @@
     chain().requestMempoolTransactions(*this);
 }
 
-bool CWallet::BackupWallet(const std::string &strDest) {
+bool CWallet::BackupWallet(const std::string &strDest) const {
     return database->Backup(strDest);
 }