Wallet: Avoid treating change-in-the-addressbook as non-change everywhere

src/interfaces/wallet.cpp

@@ -152,7 +152,7 @@ public:
     {
         LOCK(m_wallet->cs_wallet);
         auto it = m_wallet->m_address_book.find(dest);
-        if (it == m_wallet->m_address_book.end()) {
+        if (it == m_wallet->m_address_book.end() || it->second.IsChange()) {
             return false;
         }
         if (name) {
@@ -171,6 +171,7 @@ public:
         LOCK(m_wallet->cs_wallet);
         std::vector<WalletAddress> result;
         for (const auto& item : m_wallet->m_address_book) {
+            if (item.second.IsChange()) continue;
             result.emplace_back(item.first, m_wallet->IsMine(item.first), item.second.name, item.second.purpose);
         }
         return result;

src/qt/addresstablemodel.cpp

@@ -55,7 +55,7 @@ struct AddressTableEntryLessThan
 static AddressTableEntry::Type translateTransactionType(const QString &strPurpose, bool isMine)
 {
     AddressTableEntry::Type addressType = AddressTableEntry::Hidden;
-    // "refund" addresses aren't shown, and change addresses aren't in m_address_book at all.
+    // "refund" addresses aren't shown, and change addresses aren't returned by getAddresses at all.
     if (strPurpose == "send")
         addressType = AddressTableEntry::Sending;
     else if (strPurpose == "receive")

src/wallet/rpcdump.cpp

@@ -60,7 +60,8 @@ static bool GetWalletAddressesForKey(LegacyScriptPubKeyMan* spk_man, const CWall
     CKey key;
     spk_man->GetKey(keyid, key);
     for (const auto& dest : GetAllDestinationsForKey(key.GetPubKey())) {
-        if (pwallet->m_address_book.count(dest)) {
+        const auto* address_book_entry = pwallet->FindAddressBookEntry(dest);
+        if (address_book_entry) {
             if (!strAddr.empty()) {
                 strAddr += ",";
             }
@@ -168,7 +169,7 @@ UniValue importprivkey(const JSONRPCRequest& request)
             // label all new addresses, and label existing addresses if a
             // label was passed.
             for (const auto& dest : GetAllDestinationsForKey(pubkey)) {
-                if (!request.params[1].isNull() || pwallet->m_address_book.count(dest) == 0) {
+                if (!request.params[1].isNull() || !pwallet->FindAddressBookEntry(dest)) {
                     pwallet->SetAddressBook(dest, strLabel, "receive");
                 }
             }

src/wallet/rpcwallet.cpp

@@ -505,7 +505,8 @@ static UniValue listaddressgroupings(const JSONRPCRequest& request)
             addressInfo.push_back(EncodeDestination(address));
             addressInfo.push_back(ValueFromAmount(balances[address]));
             {
-                if (pwallet->m_address_book.find(address) != pwallet->m_address_book.end()) {
+                const auto* address_book_entry = pwallet->FindAddressBookEntry(address);
+                if (address_book_entry) {
                     addressInfo.push_back(pwallet->m_address_book.find(address)->second.name);
                 }
             }
@@ -1112,6 +1113,7 @@ static UniValue ListReceived(interfaces::Chain::Lock& locked_chain, const CWalle
 
     for (auto item_it = start; item_it != end; ++item_it)
     {
+        if (item_it->second.IsChange()) continue;
         const CTxDestination& address = item_it->first;
         const std::string& label = item_it->second.name;
         auto it = mapTally.find(address);
@@ -1313,7 +1315,8 @@ static void ListTransactions(interfaces::Chain::Lock& locked_chain, const CWalle
             MaybePushAddress(entry, s.destination);
             entry.pushKV("category", "send");
             entry.pushKV("amount", ValueFromAmount(-s.amount));
-            if (pwallet->m_address_book.count(s.destination)) {
+            const auto* address_book_entry = pwallet->FindAddressBookEntry(s.destination);
+            if (address_book_entry) {
                 entry.pushKV("label", pwallet->m_address_book.at(s.destination).name);
             }
             entry.pushKV("vout", s.vout);
@@ -1330,7 +1333,8 @@ static void ListTransactions(interfaces::Chain::Lock& locked_chain, const CWalle
         for (const COutputEntry& r : listReceived)
         {
             std::string label;
-            if (pwallet->m_address_book.count(r.destination)) {
+            const auto* address_book_entry = pwallet->FindAddressBookEntry(r.destination);
+            if (address_book_entry) {
                 label = pwallet->m_address_book.at(r.destination).name;
             }
             if (filter_label && label != *filter_label) {
@@ -1355,7 +1359,7 @@ static void ListTransactions(interfaces::Chain::Lock& locked_chain, const CWalle
                 entry.pushKV("category", "receive");
             }
             entry.pushKV("amount", ValueFromAmount(r.amount));
-            if (pwallet->m_address_book.count(r.destination)) {
+            if (address_book_entry) {
                 entry.pushKV("label", label);
             }
             entry.pushKV("vout", r.vout);
@@ -2955,9 +2959,9 @@ static UniValue listunspent(const JSONRPCRequest& request)
         if (fValidAddress) {
             entry.pushKV("address", EncodeDestination(address));
 
-            auto i = pwallet->m_address_book.find(address);
+            const auto* address_book_entry = pwallet->FindAddressBookEntry(address);
-            if (i != pwallet->m_address_book.end()) {
+            if (address_book_entry) {
-                entry.pushKV("label", i->second.name);
+                entry.pushKV("label", address_book_entry->name);
             }
 
             std::unique_ptr<SigningProvider> provider = pwallet->GetSolvingProvider(scriptPubKey);
@@ -3814,7 +3818,8 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
     // DEPRECATED: Return label field if existing. Currently only one label can
     // 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->m_address_book.count(dest))) {
+    const auto* address_book_entry = pwallet->FindAddressBookEntry(dest);
+    if (pwallet->chain().rpcEnableDeprecated("label") && address_book_entry) {
         ret.pushKV("label", pwallet->m_address_book.at(dest).name);
     }
 
@@ -3838,14 +3843,13 @@ 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>::const_iterator mi = pwallet->m_address_book.find(dest);
+    if (address_book_entry) {
-    if (mi != pwallet->m_address_book.end()) {
         // DEPRECATED: The previous behavior of returning an array containing a
         // JSON object of `name` and `purpose` key/value pairs is deprecated.
         if (pwallet->chain().rpcEnableDeprecated("labelspurpose")) {
-            labels.push_back(AddressBookDataToJSON(mi->second, true));
+            labels.push_back(AddressBookDataToJSON(*address_book_entry, true));
         } else {
-            labels.push_back(mi->second.name);
+            labels.push_back(address_book_entry->name);
         }
     }
     ret.pushKV("labels", std::move(labels));
@@ -3890,6 +3894,7 @@ static UniValue getaddressesbylabel(const JSONRPCRequest& request)
     UniValue ret(UniValue::VOBJ);
     std::set<std::string> addresses;
     for (const std::pair<const CTxDestination, CAddressBookData>& item : pwallet->m_address_book) {
+        if (item.second.IsChange()) continue;
         if (item.second.name == label) {
             std::string address = EncodeDestination(item.first);
             // CWallet::m_address_book is not expected to contain duplicate
@@ -3954,6 +3959,7 @@ static UniValue listlabels(const JSONRPCRequest& request)
     // Add to a set to sort by label name, then insert into Univalue array
     std::set<std::string> label_set;
     for (const std::pair<const CTxDestination, CAddressBookData>& entry : pwallet->m_address_book) {
+        if (entry.second.IsChange()) continue;
         if (purpose.empty() || entry.second.purpose == purpose) {
             label_set.insert(entry.second.name);
         }

src/wallet/wallet.cpp

@@ -1237,8 +1237,9 @@ bool CWallet::IsChange(const CScript& script) const
             return true;
 
         LOCK(cs_wallet);
-        if (!m_address_book.count(address))
+        if (!FindAddressBookEntry(address)) {
             return true;
+        }
     }
     return false;
 }
@@ -3192,7 +3193,7 @@ bool CWallet::SetAddressBookWithDB(WalletBatch& batch, const CTxDestination& add
     {
         LOCK(cs_wallet);
         std::map<CTxDestination, CAddressBookData>::iterator mi = m_address_book.find(address);
-        fUpdated = mi != m_address_book.end();
+        fUpdated = (mi != m_address_book.end() && !mi->second.IsChange());
         m_address_book[address].SetLabel(strName);
         if (!strPurpose.empty()) /* update purpose only if requested */
             m_address_book[address].purpose = strPurpose;
@@ -3459,6 +3460,7 @@ std::set<CTxDestination> CWallet::GetLabelAddresses(const std::string& label) co
     std::set<CTxDestination> result;
     for (const std::pair<const CTxDestination, CAddressBookData>& item : m_address_book)
     {
+        if (item.second.IsChange()) continue;
         const CTxDestination& address = item.first;
         const std::string& strName = item.second.name;
         if (strName == label)