diff --git a/src/index/base.cpp b/src/index/base.cpp
index dcb8e99fc1..3f3b301246 100644
--- a/src/index/base.cpp
+++ b/src/index/base.cpp
@@ -270,7 +270,7 @@ void BaseIndex::ChainStateFlushed(const CBlockLocator& locator)
     Commit();
 }
 
-bool BaseIndex::BlockUntilSyncedToCurrentChain()
+bool BaseIndex::BlockUntilSyncedToCurrentChain() const
 {
     AssertLockNotHeld(cs_main);
 
diff --git a/src/index/base.h b/src/index/base.h
index d0088d9c9a..fb30aa7a0e 100644
--- a/src/index/base.h
+++ b/src/index/base.h
@@ -97,7 +97,7 @@ public:
     /// 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/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
index 544f7ecd29..102cf1150f 100644
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -483,7 +483,7 @@ public:
     }
     unsigned int getConfirmTarget() override { return m_wallet->m_confirm_target; }
     bool hdEnabled() override { return m_wallet->IsHDEnabled(); }
-    bool canGetAddresses() override { return m_wallet->CanGetAddresses(); }
+    bool canGetAddresses() const override { return m_wallet->CanGetAddresses(); }
     bool IsWalletFlagSet(uint64_t flag) override { return m_wallet->IsWalletFlagSet(flag); }
     OutputType getDefaultAddressType() override { return m_wallet->m_default_address_type; }
     OutputType getDefaultChangeType() override { return m_wallet->m_default_change_type; }
diff --git a/src/interfaces/wallet.h b/src/interfaces/wallet.h
index 113e0b7a46..6a5443ec1d 100644
--- a/src/interfaces/wallet.h
+++ b/src/interfaces/wallet.h
@@ -248,7 +248,7 @@ public:
     virtual bool hdEnabled() = 0;
 
     // Return whether the wallet is blank.
-    virtual bool canGetAddresses() = 0;
+    virtual bool canGetAddresses() const = 0;
 
     // check if a certain wallet flag is set.
     virtual bool IsWalletFlagSet(uint64_t flag) = 0;
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
index aa6e91c05e..67be4d85d2 100644
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -850,7 +850,7 @@ bool BerkeleyDatabase::Rewrite(const char* pszSkip)
     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/db.h b/src/wallet/db.h
index abec3ae4e2..bebaa55d05 100644
--- a/src/wallet/db.h
+++ b/src/wallet/db.h
@@ -157,7 +157,7 @@ public:
 
     /** 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.
      */
@@ -193,7 +193,7 @@ private:
      * 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/rpcdump.cpp b/src/wallet/rpcdump.cpp
index 1605f33863..d153a5948b 100644
--- a/src/wallet/rpcdump.cpp
+++ b/src/wallet/rpcdump.cpp
@@ -57,7 +57,7 @@ static std::string DecodeDumpString(const std::string &str) {
     return ret.str();
 }
 
-static bool GetWalletAddressesForKey(LegacyScriptPubKeyMan* spk_man, CWallet* const pwallet, const CKeyID& keyid, std::string& strAddr, std::string& strLabel) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
+static bool GetWalletAddressesForKey(LegacyScriptPubKeyMan* spk_man, const CWallet* const pwallet, const CKeyID& keyid, std::string& strAddr, std::string& strLabel) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
 {
     bool fLabelFound = false;
     CKey key;
@@ -68,7 +68,7 @@ static bool GetWalletAddressesForKey(LegacyScriptPubKeyMan* spk_man, CWallet* co
                 strAddr += ",";
             }
             strAddr += EncodeDestination(dest);
-            strLabel = EncodeDumpString(pwallet->mapAddressBook[dest].name);
+            strLabel = EncodeDumpString(pwallet->mapAddressBook.at(dest).name);
             fLabelFound = true;
         }
     }
@@ -679,7 +679,7 @@ UniValue importwallet(const JSONRPCRequest& request)
 UniValue dumpprivkey(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;
     }
@@ -727,7 +727,7 @@ UniValue dumpprivkey(const JSONRPCRequest& request)
 UniValue dumpwallet(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
index c7f66d2bb1..f423e2dc20 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -60,7 +60,7 @@
 
 static const std::string WALLET_ENDPOINT_BASE = "/wallet/";
 
-static inline bool GetAvoidReuseFlag(CWallet * const pwallet, const UniValue& param) {
+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();
 
@@ -518,7 +518,7 @@ static UniValue sendtoaddress(const JSONRPCRequest& request)
 static UniValue listaddressgroupings(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;
@@ -580,7 +580,7 @@ static UniValue listaddressgroupings(const JSONRPCRequest& request)
 static UniValue signmessage(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;
@@ -650,7 +650,7 @@ static UniValue signmessage(const JSONRPCRequest& request)
 static UniValue getreceivedbyaddress(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;
@@ -703,7 +703,7 @@ static UniValue getreceivedbyaddress(const JSONRPCRequest& request)
     // Tally
     CAmountMap amounts;
     for (auto& pairWtx : pwallet->mapWallet) {
-        CWalletTx& wtx = pairWtx.second;
+        const CWalletTx& wtx = pairWtx.second;
         if (wtx.IsCoinBase() || !locked_chain->checkFinalTx(*wtx.tx)) {
             continue;
         }
@@ -736,7 +736,7 @@ static UniValue getreceivedbyaddress(const JSONRPCRequest& request)
 static UniValue getreceivedbylabel(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;
@@ -783,7 +783,7 @@ static UniValue getreceivedbylabel(const JSONRPCRequest& request)
     // Tally
     CAmountMap amounts;
     for (auto& pairWtx : pwallet->mapWallet) {
-        CWalletTx& wtx = pairWtx.second;
+        const CWalletTx& wtx = pairWtx.second;
         if (wtx.IsCoinBase() || !locked_chain->checkFinalTx(*wtx.tx)) {
             continue;
         }
@@ -817,7 +817,7 @@ static UniValue getreceivedbylabel(const JSONRPCRequest& request)
 static UniValue getbalance(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;
@@ -885,7 +885,7 @@ static UniValue getbalance(const JSONRPCRequest& request)
 static UniValue getunconfirmedbalance(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;
@@ -1232,7 +1232,7 @@ struct tallyitem
     }
 };
 
-static UniValue ListReceived(interfaces::Chain::Lock& locked_chain, CWallet * const pwallet, const UniValue& params, bool by_label) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
+static UniValue ListReceived(interfaces::Chain::Lock& locked_chain, const CWallet* const pwallet, const UniValue& params, bool by_label) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
 {
     // Minimum confirmations
     int nMinDepth = 1;
@@ -1401,7 +1401,7 @@ static UniValue ListReceived(interfaces::Chain::Lock& locked_chain, CWallet * co
 static UniValue listreceivedbyaddress(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;
@@ -1454,7 +1454,7 @@ static UniValue listreceivedbyaddress(const JSONRPCRequest& request)
 static UniValue listreceivedbylabel(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;
@@ -1514,7 +1514,7 @@ static void MaybePushAddress(UniValue & entry, const CTxDestination &dest)
  * @param  filter_ismine  The "is mine" filter flags.
  * @param  filter_label   Optional label string to filter incoming transactions.
  */
-static void ListTransactions(interfaces::Chain::Lock& locked_chain, CWallet* const pwallet, const CWalletTx& wtx, int nMinDepth, bool fLong, UniValue& ret, const isminefilter& filter_ismine, const std::string* filter_label) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
+static void ListTransactions(interfaces::Chain::Lock& locked_chain, const CWallet* const pwallet, const CWalletTx& wtx, int nMinDepth, bool fLong, UniValue& ret, const isminefilter& filter_ismine, const std::string* filter_label) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
 {
     CAmount nFee;
     std::list<COutputEntry> listReceived;
@@ -1542,7 +1542,7 @@ static void ListTransactions(interfaces::Chain::Lock& locked_chain, CWallet* con
                 entry.pushKV("assetblinder", s.asset_blinding_factor.GetHex());
             }
             if (pwallet->mapAddressBook.count(s.destination)) {
-                entry.pushKV("label", pwallet->mapAddressBook[s.destination].name);
+                entry.pushKV("label", pwallet->mapAddressBook.at(s.destination).name);
             }
             entry.pushKV("vout", s.vout);
             entry.pushKV("fee", ValueFromAmount(-nFee));
@@ -1559,7 +1559,7 @@ static void ListTransactions(interfaces::Chain::Lock& locked_chain, CWallet* con
         {
             std::string label;
             if (pwallet->mapAddressBook.count(r.destination)) {
-                label = pwallet->mapAddressBook[r.destination].name;
+                label = pwallet->mapAddressBook.at(r.destination).name;
             }
             if (filter_label && label != *filter_label) {
                 continue;
@@ -1624,7 +1624,7 @@ static const std::vector<RPCResult> TransactionDescriptionString()
 UniValue listtransactions(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;
@@ -1738,7 +1738,7 @@ UniValue listtransactions(const JSONRPCRequest& request)
 static UniValue listsinceblock(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;
@@ -1880,7 +1880,7 @@ static UniValue listsinceblock(const JSONRPCRequest& request)
 static UniValue gettransaction(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;
@@ -2054,7 +2054,7 @@ static UniValue abandontransaction(const JSONRPCRequest& request)
 static UniValue backupwallet(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;
@@ -2503,7 +2503,7 @@ static UniValue lockunspent(const JSONRPCRequest& request)
 static UniValue listlockunspent(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;
@@ -2669,7 +2669,7 @@ static UniValue getbalances(const JSONRPCRequest& request)
 static UniValue getwalletinfo(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;
@@ -3051,7 +3051,7 @@ static UniValue unloadwallet(const JSONRPCRequest& request)
 static UniValue listunspent(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;
@@ -3641,7 +3641,7 @@ static UniValue fundrawtransaction(const JSONRPCRequest& request)
 UniValue signrawtransactionwithwallet(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;
@@ -4138,7 +4138,7 @@ public:
     UniValue operator()(const NullData& id) const { return NullUniValue; }
 };
 
-static UniValue DescribeWalletAddress(CWallet* pwallet, const CTxDestination& dest)
+static UniValue DescribeWalletAddress(const CWallet* const pwallet, const CTxDestination& dest)
 {
     UniValue ret(UniValue::VOBJ);
     UniValue detail = DescribeAddress(dest);
@@ -4155,10 +4155,10 @@ static UniValue DescribeWalletAddress(CWallet* pwallet, const CTxDestination& de
 class DescribeWalletBlindAddressVisitor : public boost::static_visitor<UniValue>
 {
 public:
-    CWallet * const pwallet;
+    const CWallet * const pwallet;
     isminetype mine;
 
-    explicit DescribeWalletBlindAddressVisitor(CWallet* _pwallet, isminetype mine_in) : pwallet(_pwallet), mine(mine_in) {}
+    explicit DescribeWalletBlindAddressVisitor(const CWallet* _pwallet, isminetype mine_in) : pwallet(_pwallet), mine(mine_in) {}
 
     UniValue operator()(const CNoDestination& dest) const { return UniValue(UniValue::VOBJ); }
 
@@ -4222,7 +4222,7 @@ public:
     UniValue operator()(const NullData& id) const { return NullUniValue; }
 };
 
-static UniValue DescribeWalletBlindAddress(CWallet* pwallet, const CTxDestination& dest, isminetype mine)
+static UniValue DescribeWalletBlindAddress(const CWallet* pwallet, const CTxDestination& dest, isminetype mine)
 {
     UniValue ret(UniValue::VOBJ);
     ret.pushKVs(boost::apply_visitor(DescribeWalletBlindAddressVisitor(pwallet, mine), dest));
@@ -4243,7 +4243,7 @@ static UniValue AddressBookDataToJSON(const CAddressBookData& data, const bool v
 UniValue getaddressinfo(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;
@@ -4358,7 +4358,7 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
     // be associated with an address, so the label should be equivalent to the
     // value of the name key/value pair in the labels array below.
     if ((pwallet->chain().rpcEnableDeprecated("label")) && (pwallet->mapAddressBook.count(dest))) {
-        ret.pushKV("label", pwallet->mapAddressBook[dest].name);
+        ret.pushKV("label", pwallet->mapAddressBook.at(dest).name);
     }
 
     ret.pushKV("ischange", pwallet->IsChange(scriptPubKey));
@@ -4381,7 +4381,7 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
     // stable if we allow multiple labels to be associated with an address in
     // the future.
     UniValue labels(UniValue::VARR);
-    std::map<CTxDestination, CAddressBookData>::iterator mi = pwallet->mapAddressBook.find(dest);
+    std::map<CTxDestination, CAddressBookData>::const_iterator mi = pwallet->mapAddressBook.find(dest);
     if (mi != pwallet->mapAddressBook.end()) {
         // DEPRECATED: The previous behavior of returning an array containing a
         // JSON object of `name` and `purpose` key/value pairs is deprecated.
@@ -4399,7 +4399,7 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
 static UniValue getaddressesbylabel(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;
@@ -4458,7 +4458,7 @@ static UniValue getaddressesbylabel(const JSONRPCRequest& request)
 static UniValue listlabels(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;
@@ -4594,7 +4594,7 @@ UniValue walletfillpsbtdata(const JSONRPCRequest& request)
         throw std::runtime_error("PSBT operations are disabled when not in elementsmode.\n");
 
     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.cpp b/src/wallet/scriptpubkeyman.cpp
index 954dcd10de..d6d1bef355 100644
--- a/src/wallet/scriptpubkeyman.cpp
+++ b/src/wallet/scriptpubkeyman.cpp
@@ -365,7 +365,7 @@ bool LegacyScriptPubKeyMan::IsHDEnabled() const
     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
@@ -448,7 +448,7 @@ static int64_t GetOldestKeyTimeInPool(const std::set<int64_t>& setKeyPool, Walle
     return keypool.nTime;
 }
 
-int64_t LegacyScriptPubKeyMan::GetOldestKeyPoolTime()
+int64_t LegacyScriptPubKeyMan::GetOldestKeyPoolTime() const
 {
     LOCK(cs_KeyStore);
 
@@ -466,7 +466,7 @@ int64_t LegacyScriptPubKeyMan::GetOldestKeyPoolTime()
     return oldestKey;
 }
 
-size_t LegacyScriptPubKeyMan::KeypoolCountExternalKeys()
+size_t LegacyScriptPubKeyMan::KeypoolCountExternalKeys() const
 {
     LOCK(cs_KeyStore);
     return setExternalKeyPool.size() + set_pre_split_keypool.size();
@@ -980,7 +980,7 @@ void LegacyScriptPubKeyMan::LoadKeyPool(int64_t nIndex, const CKeyPool &keypool)
         mapKeyMetadata[keyid] = CKeyMetadata(keypool.nTime);
 }
 
-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/scriptpubkeyman.h b/src/wallet/scriptpubkeyman.h
index 6bc9beb479..7b1943ecff 100644
--- a/src/wallet/scriptpubkeyman.h
+++ b/src/wallet/scriptpubkeyman.h
@@ -184,7 +184,7 @@ public:
     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; }
+    virtual bool CanGetAddresses(bool internal = false) const { return false; }
 
     /** Upgrades the wallet to the specified version */
     virtual bool Upgrade(int prev_version, std::string& error) { return false; }
@@ -194,9 +194,9 @@ public:
     //! 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; }
@@ -336,15 +336,15 @@ public:
 
     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> GetSigningProvider(const CScript& script) const override;
 
@@ -410,7 +410,7 @@ public:
     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();
+    bool CanGenerateKeys() const;
 
     /* Generates a new HD seed (will not be activated) */
     CPubKey GenerateNewSeed();
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 0966e5f49c..4ef28e11f5 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -1156,7 +1156,7 @@ void CWallet::UpdatedBlockTip()
 }
 
 
-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 queue and wait
@@ -1379,7 +1379,7 @@ bool CWallet::IsHDEnabled() const
     return result;
 }
 
-bool CWallet::CanGetAddresses(bool internal)
+bool CWallet::CanGetAddresses(bool internal) const
 {
     LOCK(cs_wallet);
     if (m_spk_managers.empty()) return false;
@@ -3809,7 +3809,7 @@ bool CWallet::DelAddressBook(const CTxDestination& address)
     return WalletBatch(*database).EraseName(EncodeDestination(address));
 }
 
-size_t CWallet::KeypoolCountExternalKeys()
+size_t CWallet::KeypoolCountExternalKeys() const
 {
     AssertLockHeld(cs_wallet);
 
@@ -3893,7 +3893,7 @@ bool CWallet::GetNewChangeDestination(const OutputType type, CTxDestination& des
     return true;
 }
 
-int64_t CWallet::GetOldestKeyPoolTime()
+int64_t CWallet::GetOldestKeyPoolTime() const
 {
     LOCK(cs_wallet);
     int64_t oldestKey = std::numeric_limits<int64_t>::max();
@@ -3917,7 +3917,7 @@ void CWallet::MarkDestinationsDirty(const std::set<CTxDestination>& destinations
     }
 }
 
-std::map<CTxDestination, CAmount> CWallet::GetAddressBalances(interfaces::Chain::Lock& locked_chain)
+std::map<CTxDestination, CAmount> CWallet::GetAddressBalances(interfaces::Chain::Lock& locked_chain) const
 {
     std::map<CTxDestination, CAmount> balances;
 
@@ -3962,7 +3962,7 @@ std::map<CTxDestination, CAmount> CWallet::GetAddressBalances(interfaces::Chain:
     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;
@@ -4730,7 +4730,7 @@ void CWallet::postInitProcess()
     chain().requestMempoolTransactions(*this);
 }
 
-bool CWallet::BackupWallet(const std::string& strDest)
+bool CWallet::BackupWallet(const std::string& strDest) const
 {
     return database->Backup(strDest);
 }
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index c52ebc7de7..dfc23bb760 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -142,7 +142,7 @@ 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};
     OutputType const type;
@@ -945,8 +945,8 @@ public:
      * 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; }
     double ScanningProgress() const { return fScanningWallet ? (double) m_scanning_progress : 0; }
 
@@ -1081,13 +1081,13 @@ public:
     /** Absolute maximum transaction fee (in satoshis) used by default for the wallet */
     CAmount 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() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
-    std::map<CTxDestination, CAmount> GetAddressBalances(interfaces::Chain::Lock& locked_chain);
+    std::set<std::set<CTxDestination>> GetAddressGroupings() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+    std::map<CTxDestination, CAmount> GetAddressBalances(interfaces::Chain::Lock& locked_chain) const;
 
     std::set<CTxDestination> GetLabelAddresses(const std::string& label) const;
 
@@ -1145,7 +1145,7 @@ public:
     bool SetMaxVersion(int nVersion);
 
     //! get the current wallet format (the oldest client version guaranteed to understand this wallet)
-    int GetVersion() { LOCK(cs_wallet); return nWalletVersion; }
+    int GetVersion() const { LOCK(cs_wallet); return nWalletVersion; }
 
     //! Get wallet transactions that conflict with given transaction (spend same outputs)
     std::set<uint256> GetConflicts(const uint256& txid) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
@@ -1216,13 +1216,13 @@ public:
      */
     void postInitProcess();
 
-    bool BackupWallet(const std::string& strDest);
+    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);
+    bool CanGetAddresses(bool internal = false) const;
 
     /**
      * Blocks until the wallet state is up-to-date to /at least/ the current
@@ -1230,7 +1230,7 @@ public:
      * 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 */
     void SetWalletFlag(uint64_t flags);