Merge #11117: Prepare for non-Base58 addresses

864cd2787 Move CBitcoinAddress to base58.cpp (Pieter Wuille)
5c8ff0d44 Introduce wrappers around CBitcoinAddress (Pieter Wuille)

Pull request description:

  This patch removes the need for the intermediary Base58 type `CBitcoinAddress`, by providing {`Encode`,`Decode`,`IsValid`}`Destination` functions that directly operate on the conversion between `std::string`s and `CTxDestination`.

  As a side, it also fixes a number of indentation issues, and removes probably several unnecessary implicit `CTxDestination`<->`CBitcoinAddress` conversions.

  This change is far from complete. In follow-ups I'd like to:
  * Split off the specific address and key encoding logic from base58.h, and move it to a address.h or so.
  * Replace `CTxDestination` with a non-`boost::variant` version (which can be more efficient as `boost::variant` allocates everything on the heap, and remove the need for `boost::get<...>` and `IsValidDestination` calls everywhere).
  * Do the same for `CBitcoinSecret`, `CBitcoinExtKey`, and `CBitcoinExtPubKey`.

  However, I've tried to keep this patch to be minimally invasive, but still enough to support non-Base58 addresses. Perhaps a smaller patch is possible to hack Bech32 support into `CBitcoinAddress`, but I would consider that a move in the wrong direction.

Tree-SHA512: c2c77ffb57caeadf2429b1c2562ce60e8c7be8aa9f8e51b591f354b6b441162625b2efe14c023a1ae485cf2ed417263afa35c892891dfaa7844e7fbabccab85e

src/base58.cpp

@@ -212,6 +212,30 @@ int CBase58Data::CompareTo(const CBase58Data& b58) const
 
 namespace
 {
+/** base58-encoded Bitcoin addresses.
+ * Public-key-hash-addresses have version 0 (or 111 testnet).
+ * The data vector contains RIPEMD160(SHA256(pubkey)), where pubkey is the serialized public key.
+ * Script-hash-addresses have version 5 (or 196 testnet).
+ * The data vector contains RIPEMD160(SHA256(cscript)), where cscript is the serialized redemption script.
+ */
+class CBitcoinAddress : public CBase58Data {
+public:
+    bool Set(const CKeyID &id);
+    bool Set(const CScriptID &id);
+    bool Set(const CTxDestination &dest);
+    bool IsValid() const;
+    bool IsValid(const CChainParams &params) const;
+
+    CBitcoinAddress() {}
+    CBitcoinAddress(const CTxDestination &dest) { Set(dest); }
+    CBitcoinAddress(const std::string& strAddress) { SetString(strAddress); }
+    CBitcoinAddress(const char* pszAddress) { SetString(pszAddress); }
+
+    CTxDestination Get() const;
+    bool GetKeyID(CKeyID &keyID) const;
+    bool IsScript() const;
+};
+
 class CBitcoinAddressVisitor : public boost::static_visitor<bool>
 {
 private:
@@ -318,3 +342,25 @@ bool CBitcoinSecret::SetString(const std::string& strSecret)
 {
     return SetString(strSecret.c_str());
 }
+
+std::string EncodeDestination(const CTxDestination& dest)
+{
+    CBitcoinAddress addr(dest);
+    if (!addr.IsValid()) return "";
+    return addr.ToString();
+}
+
+CTxDestination DecodeDestination(const std::string& str)
+{
+    return CBitcoinAddress(str).Get();
+}
+
+bool IsValidDestinationString(const std::string& str, const CChainParams& params)
+{
+    return CBitcoinAddress(str).IsValid(params);
+}
+
+bool IsValidDestinationString(const std::string& str)
+{
+    return CBitcoinAddress(str).IsValid();
+}

src/base58.h

@@ -95,30 +95,6 @@ public:
     bool operator> (const CBase58Data& b58) const { return CompareTo(b58) >  0; }
 };
 
-/** base58-encoded Bitcoin addresses.
- * Public-key-hash-addresses have version 0 (or 111 testnet).
- * The data vector contains RIPEMD160(SHA256(pubkey)), where pubkey is the serialized public key.
- * Script-hash-addresses have version 5 (or 196 testnet).
- * The data vector contains RIPEMD160(SHA256(cscript)), where cscript is the serialized redemption script.
- */
-class CBitcoinAddress : public CBase58Data {
-public:
-    bool Set(const CKeyID &id);
-    bool Set(const CScriptID &id);
-    bool Set(const CTxDestination &dest);
-    bool IsValid() const;
-    bool IsValid(const CChainParams &params) const;
-
-    CBitcoinAddress() {}
-    CBitcoinAddress(const CTxDestination &dest) { Set(dest); }
-    CBitcoinAddress(const std::string& strAddress) { SetString(strAddress); }
-    CBitcoinAddress(const char* pszAddress) { SetString(pszAddress); }
-
-    CTxDestination Get() const;
-    bool GetKeyID(CKeyID &keyID) const;
-    bool IsScript() const;
-};
-
 /**
  * A base58-encoded secret key
  */
@@ -167,4 +143,9 @@ public:
 typedef CBitcoinExtKeyBase<CExtKey, BIP32_EXTKEY_SIZE, CChainParams::EXT_SECRET_KEY> CBitcoinExtKey;
 typedef CBitcoinExtKeyBase<CExtPubKey, BIP32_EXTKEY_SIZE, CChainParams::EXT_PUBLIC_KEY> CBitcoinExtPubKey;
 
+std::string EncodeDestination(const CTxDestination& dest);
+CTxDestination DecodeDestination(const std::string& str);
+bool IsValidDestinationString(const std::string& str);
+bool IsValidDestinationString(const std::string& str, const CChainParams& params);
+
 #endif // BITCOIN_BASE58_H

src/bitcoin-tx.cpp

@@ -271,11 +271,11 @@ static void MutateTxAddOutAddr(CMutableTransaction& tx, const std::string& strIn
 
     // extract and validate ADDRESS
     std::string strAddr = vStrInputParts[1];
-    CBitcoinAddress addr(strAddr);
-    if (!addr.IsValid())
+    CTxDestination destination = DecodeDestination(strAddr);
+    if (!IsValidDestination(destination)) {
         throw std::runtime_error("invalid TX output address");
-    // build standard output script via GetScriptForDestination()
-    CScript scriptPubKey = GetScriptForDestination(addr.Get());
+    }
+    CScript scriptPubKey = GetScriptForDestination(destination);
 
     // construct TxOut, append to transaction output list
     CTxOut txout(value, scriptPubKey);
@@ -314,10 +314,8 @@ static void MutateTxAddOutPubKey(CMutableTransaction& tx, const std::string& str
         scriptPubKey = GetScriptForWitness(scriptPubKey);
     }
     if (bScriptHash) {
-        // Get the address for the redeem script, then call
-        // GetScriptForDestination() to construct a P2SH scriptPubKey.
-        CBitcoinAddress redeemScriptAddr(scriptPubKey);
-        scriptPubKey = GetScriptForDestination(redeemScriptAddr.Get());
+        // Get the ID for the script, and then construct a P2SH destination for it.
+        scriptPubKey = GetScriptForDestination(CScriptID(scriptPubKey));
     }
 
     // construct TxOut, append to transaction output list
@@ -381,10 +379,8 @@ static void MutateTxAddOutMultiSig(CMutableTransaction& tx, const std::string& s
         scriptPubKey = GetScriptForWitness(scriptPubKey);
     }
     if (bScriptHash) {
-        // Get the address for the redeem script, then call
-        // GetScriptForDestination() to construct a P2SH scriptPubKey.
-        CBitcoinAddress addr(scriptPubKey);
-        scriptPubKey = GetScriptForDestination(addr.Get());
+        // Get the ID for the script, and then construct a P2SH destination for it.
+        scriptPubKey = GetScriptForDestination(CScriptID(scriptPubKey));
     }
 
     // construct TxOut, append to transaction output list
@@ -444,11 +440,10 @@ static void MutateTxAddOutScript(CMutableTransaction& tx, const std::string& str
     }
 
     if (bSegWit) {
-      scriptPubKey = GetScriptForWitness(scriptPubKey);
+        scriptPubKey = GetScriptForWitness(scriptPubKey);
     }
     if (bScriptHash) {
-      CBitcoinAddress addr(scriptPubKey);
-      scriptPubKey = GetScriptForDestination(addr.Get());
+        scriptPubKey = GetScriptForDestination(CScriptID(scriptPubKey));
     }
 
     // construct TxOut, append to transaction output list

src/core_write.cpp

@@ -148,8 +148,9 @@ void ScriptPubKeyToUniv(const CScript& scriptPubKey,
     out.pushKV("type", GetTxnOutputType(type));
 
     UniValue a(UniValue::VARR);
-    for (const CTxDestination& addr : addresses)
-        a.push_back(CBitcoinAddress(addr).ToString());
+    for (const CTxDestination& addr : addresses) {
+        a.push_back(EncodeDestination(addr));
+    }
     out.pushKV("addresses", a);
 }
 

src/qt/addresstablemodel.cpp

@@ -82,14 +82,14 @@ public:
             LOCK(wallet->cs_wallet);
             for (const std::pair<CTxDestination, CAddressBookData>& item : wallet->mapAddressBook)
             {
-                const CBitcoinAddress& address = item.first;
-                bool fMine = IsMine(*wallet, address.Get());
+                const CTxDestination& address = item.first;
+                bool fMine = IsMine(*wallet, address);
                 AddressTableEntry::Type addressType = translateTransactionType(
                         QString::fromStdString(item.second.purpose), fMine);
                 const std::string& strName = item.second.name;
                 cachedAddressTable.append(AddressTableEntry(addressType,
                                   QString::fromStdString(strName),
-                                  QString::fromStdString(address.ToString())));
+                                  QString::fromStdString(EncodeDestination(address))));
             }
         }
         // qLowerBound() and qUpperBound() require our cachedAddressTable list to be sorted in asc order
@@ -246,7 +246,7 @@ bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
     if(role == Qt::EditRole)
     {
         LOCK(wallet->cs_wallet); /* For SetAddressBook / DelAddressBook */
-        CTxDestination curAddress = CBitcoinAddress(rec->address.toStdString()).Get();
+        CTxDestination curAddress = DecodeDestination(rec->address.toStdString());
         if(index.column() == Label)
         {
             // Do nothing, if old label == new label
@@ -257,7 +257,7 @@ bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
             }
             wallet->SetAddressBook(curAddress, value.toString().toStdString(), strPurpose);
         } else if(index.column() == Address) {
-            CTxDestination newAddress = CBitcoinAddress(value.toString().toStdString()).Get();
+            CTxDestination newAddress = DecodeDestination(value.toString().toStdString());
             // Refuse to set invalid address, set error status and return false
             if(boost::get<CNoDestination>(&newAddress))
             {
@@ -358,7 +358,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
         // Check for duplicate addresses
         {
             LOCK(wallet->cs_wallet);
-            if(wallet->mapAddressBook.count(CBitcoinAddress(strAddress).Get()))
+            if(wallet->mapAddressBook.count(DecodeDestination(strAddress)))
             {
                 editStatus = DUPLICATE_ADDRESS;
                 return QString();
@@ -384,7 +384,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
                 return QString();
             }
         }
-        strAddress = CBitcoinAddress(newKey.GetID()).ToString();
+        strAddress = EncodeDestination(newKey.GetID());
     }
     else
     {
@@ -394,7 +394,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
     // Add entry
     {
         LOCK(wallet->cs_wallet);
-        wallet->SetAddressBook(CBitcoinAddress(strAddress).Get(), strLabel,
+        wallet->SetAddressBook(DecodeDestination(strAddress), strLabel,
                                (type == Send ? "send" : "receive"));
     }
     return QString::fromStdString(strAddress);
@@ -412,7 +412,7 @@ bool AddressTableModel::removeRows(int row, int count, const QModelIndex &parent
     }
     {
         LOCK(wallet->cs_wallet);
-        wallet->DelAddressBook(CBitcoinAddress(rec->address.toStdString()).Get());
+        wallet->DelAddressBook(DecodeDestination(rec->address.toStdString()));
     }
     return true;
 }
@@ -423,8 +423,8 @@ QString AddressTableModel::labelForAddress(const QString &address) const
 {
     {
         LOCK(wallet->cs_wallet);
-        CBitcoinAddress address_parsed(address.toStdString());
-        std::map<CTxDestination, CAddressBookData>::iterator mi = wallet->mapAddressBook.find(address_parsed.Get());
+        CTxDestination destination = DecodeDestination(address.toStdString());
+        std::map<CTxDestination, CAddressBookData>::iterator mi = wallet->mapAddressBook.find(destination);
         if (mi != wallet->mapAddressBook.end())
         {
             return QString::fromStdString(mi->second.name);

src/qt/bitcoinaddressvalidator.cpp

@@ -89,9 +89,9 @@ QValidator::State BitcoinAddressCheckValidator::validate(QString &input, int &po
 {
     Q_UNUSED(pos);
     // Validate the passed Bitcoin address
-    CBitcoinAddress addr(input.toStdString());
-    if (addr.IsValid())
+    if (IsValidDestinationString(input.toStdString())) {
         return QValidator::Acceptable;
+    }
 
     return QValidator::Invalid;
 }

src/qt/coincontroldialog.cpp

@@ -660,7 +660,7 @@ void CoinControlDialog::updateView()
             QString sAddress = "";
             if(ExtractDestination(out.tx->tx->vout[out.i].scriptPubKey, outputAddress))
             {
-                sAddress = QString::fromStdString(CBitcoinAddress(outputAddress).ToString());
+                sAddress = QString::fromStdString(EncodeDestination(outputAddress));
 
                 // if listMode or change => show bitcoin address. In tree mode, address is not shown again for direct wallet address outputs
                 if (!treeMode || (!(sAddress == sWalletAddress)))

src/qt/guiutil.cpp

@@ -112,8 +112,9 @@ static std::string DummyAddress(const CChainParams &params)
     sourcedata.insert(sourcedata.end(), dummydata, dummydata + sizeof(dummydata));
     for(int i=0; i<256; ++i) { // Try every trailing byte
         std::string s = EncodeBase58(sourcedata.data(), sourcedata.data() + sourcedata.size());
-        if (!CBitcoinAddress(s).IsValid())
+        if (!IsValidDestinationString(s)) {
             return s;
+        }
         sourcedata[sourcedata.size()-1] += 1;
     }
     return "";
@@ -248,7 +249,7 @@ QString formatBitcoinURI(const SendCoinsRecipient &info)
 
 bool isDust(const QString& address, const CAmount& amount)
 {
-    CTxDestination dest = CBitcoinAddress(address.toStdString()).Get();
+    CTxDestination dest = DecodeDestination(address.toStdString());
     CScript script = GetScriptForDestination(dest);
     CTxOut txOut(amount, script);
     return IsDust(txOut, ::dustRelayFee);

src/qt/paymentserver.cpp

@@ -218,17 +218,15 @@ void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
             SendCoinsRecipient r;
             if (GUIUtil::parseBitcoinURI(arg, &r) && !r.address.isEmpty())
             {
-                CBitcoinAddress address(r.address.toStdString());
                 auto tempChainParams = CreateChainParams(CBaseChainParams::MAIN);
 
-                if (address.IsValid(*tempChainParams))
-                {
+                if (IsValidDestinationString(r.address.toStdString(), *tempChainParams)) {
                     SelectParams(CBaseChainParams::MAIN);
-                }
-                else {
+                } else {
                     tempChainParams = CreateChainParams(CBaseChainParams::TESTNET);
-                    if (address.IsValid(*tempChainParams))
+                    if (IsValidDestinationString(r.address.toStdString(), *tempChainParams)) {
                         SelectParams(CBaseChainParams::TESTNET);
+                    }
                 }
             }
         }
@@ -441,8 +439,7 @@ void PaymentServer::handleURIOrFile(const QString& s)
             SendCoinsRecipient recipient;
             if (GUIUtil::parseBitcoinURI(s, &recipient))
             {
-                CBitcoinAddress address(recipient.address.toStdString());
-                if (!address.IsValid()) {
+                if (!IsValidDestinationString(recipient.address.toStdString())) {
                     Q_EMIT message(tr("URI handling"), tr("Invalid payment address %1").arg(recipient.address),
                         CClientUIInterface::MSG_ERROR);
                 }
@@ -560,7 +557,7 @@ bool PaymentServer::processPaymentRequest(const PaymentRequestPlus& request, Sen
         CTxDestination dest;
         if (ExtractDestination(sendingTo.first, dest)) {
             // Append destination address
-            addresses.append(QString::fromStdString(CBitcoinAddress(dest).ToString()));
+            addresses.append(QString::fromStdString(EncodeDestination(dest)));
         }
         else if (!recipient.authenticatedMerchant.isEmpty()) {
             // Unauthenticated payment requests to custom bitcoin addresses are not supported

src/qt/sendcoinsdialog.cpp

@@ -777,19 +777,18 @@ void SendCoinsDialog::coinControlChangeEdited(const QString& text)
         CoinControlDialog::coinControl->destChange = CNoDestination();
         ui->labelCoinControlChangeLabel->setStyleSheet("QLabel{color:red;}");
 
-        CBitcoinAddress addr = CBitcoinAddress(text.toStdString());
+        const CTxDestination dest = DecodeDestination(text.toStdString());
 
         if (text.isEmpty()) // Nothing entered
         {
             ui->labelCoinControlChangeLabel->setText("");
         }
-        else if (!addr.IsValid()) // Invalid address
+        else if (!IsValidDestination(dest)) // Invalid address
         {
             ui->labelCoinControlChangeLabel->setText(tr("Warning: Invalid Bitcoin address"));
         }
         else // Valid address
         {
-            const CTxDestination dest = addr.Get();
             if (!model->IsSpendable(dest)) {
                 ui->labelCoinControlChangeLabel->setText(tr("Warning: Unknown change address"));
 

src/qt/signverifymessagedialog.cpp

@@ -117,16 +117,14 @@ void SignVerifyMessageDialog::on_signMessageButton_SM_clicked()
     /* Clear old signature to ensure users don't get confused on error with an old signature displayed */
     ui->signatureOut_SM->clear();
 
-    CBitcoinAddress addr(ui->addressIn_SM->text().toStdString());
-    if (!addr.IsValid())
-    {
+    CTxDestination destination = DecodeDestination(ui->addressIn_SM->text().toStdString());
+    if (!IsValidDestination(destination)) {
         ui->statusLabel_SM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_SM->setText(tr("The entered address is invalid.") + QString(" ") + tr("Please check the address and try again."));
         return;
     }
-    CKeyID keyID;
-    if (!addr.GetKeyID(keyID))
-    {
+    const CKeyID* keyID = boost::get<CKeyID>(&destination);
+    if (!keyID) {
         ui->addressIn_SM->setValid(false);
         ui->statusLabel_SM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_SM->setText(tr("The entered address does not refer to a key.") + QString(" ") + tr("Please check the address and try again."));
@@ -142,7 +140,7 @@ void SignVerifyMessageDialog::on_signMessageButton_SM_clicked()
     }
 
     CKey key;
-    if (!model->getPrivKey(keyID, key))
+    if (!model->getPrivKey(*keyID, key))
     {
         ui->statusLabel_SM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_SM->setText(tr("Private key for the entered address is not available."));
@@ -197,16 +195,13 @@ void SignVerifyMessageDialog::on_addressBookButton_VM_clicked()
 
 void SignVerifyMessageDialog::on_verifyMessageButton_VM_clicked()
 {
-    CBitcoinAddress addr(ui->addressIn_VM->text().toStdString());
-    if (!addr.IsValid())
-    {
+    CTxDestination destination = DecodeDestination(ui->addressIn_VM->text().toStdString());
+    if (!IsValidDestination(destination)) {
         ui->statusLabel_VM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_VM->setText(tr("The entered address is invalid.") + QString(" ") + tr("Please check the address and try again."));
         return;
     }
-    CKeyID keyID;
-    if (!addr.GetKeyID(keyID))
-    {
+    if (!boost::get<CKeyID>(&destination)) {
         ui->addressIn_VM->setValid(false);
         ui->statusLabel_VM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_VM->setText(tr("The entered address does not refer to a key.") + QString(" ") + tr("Please check the address and try again."));
@@ -237,8 +232,7 @@ void SignVerifyMessageDialog::on_verifyMessageButton_VM_clicked()
         return;
     }
 
-    if (!(CBitcoinAddress(pubkey.GetID()) == addr))
-    {
+    if (!(CTxDestination(pubkey.GetID()) == destination)) {
         ui->statusLabel_VM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_VM->setText(QString("<nobr>") + tr("Message verification failed.") + QString("</nobr>"));
         return;

src/qt/test/wallettests.cpp

@@ -57,11 +57,11 @@ void ConfirmSend(QString* text = nullptr, bool cancel = false)
 }
 
 //! Send coins to address and return txid.
-uint256 SendCoins(CWallet& wallet, SendCoinsDialog& sendCoinsDialog, const CBitcoinAddress& address, CAmount amount, bool rbf)
+uint256 SendCoins(CWallet& wallet, SendCoinsDialog& sendCoinsDialog, const CTxDestination& address, CAmount amount, bool rbf)
 {
     QVBoxLayout* entries = sendCoinsDialog.findChild<QVBoxLayout*>("entries");
     SendCoinsEntry* entry = qobject_cast<SendCoinsEntry*>(entries->itemAt(0)->widget());
-    entry->findChild<QValidatedLineEdit*>("payTo")->setText(QString::fromStdString(address.ToString()));
+    entry->findChild<QValidatedLineEdit*>("payTo")->setText(QString::fromStdString(EncodeDestination(address)));
     entry->findChild<BitcoinAmountField*>("payAmount")->setValue(amount);
     sendCoinsDialog.findChild<QFrame*>("frameFee")
         ->findChild<QFrame*>("frameFeeSelection")
@@ -172,8 +172,8 @@ void TestSendCoins()
     // Send two transactions, and verify they are added to transaction list.
     TransactionTableModel* transactionTableModel = walletModel.getTransactionTableModel();
     QCOMPARE(transactionTableModel->rowCount({}), 105);
-    uint256 txid1 = SendCoins(wallet, sendCoinsDialog, CBitcoinAddress(CKeyID()), 5 * COIN, false /* rbf */);
-    uint256 txid2 = SendCoins(wallet, sendCoinsDialog, CBitcoinAddress(CKeyID()), 10 * COIN, true /* rbf */);
+    uint256 txid1 = SendCoins(wallet, sendCoinsDialog, CKeyID(), 5 * COIN, false /* rbf */);
+    uint256 txid2 = SendCoins(wallet, sendCoinsDialog, CKeyID(), 10 * COIN, true /* rbf */);
     QCOMPARE(transactionTableModel->rowCount({}), 107);
     QVERIFY(FindTx(*transactionTableModel, txid1).isValid());
     QVERIFY(FindTx(*transactionTableModel, txid2).isValid());

src/qt/transactiondesc.cpp

@@ -91,9 +91,8 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
         if (nNet > 0)
         {
             // Credit
-            if (CBitcoinAddress(rec->address).IsValid())
-            {
-                CTxDestination address = CBitcoinAddress(rec->address).Get();
+            if (IsValidDestinationString(rec->address)) {
+                CTxDestination address = DecodeDestination(rec->address);
                 if (wallet->mapAddressBook.count(address))
                 {
                     strHTML += "<b>" + tr("From") + ":</b> " + tr("unknown") + "<br>";
@@ -118,7 +117,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
         // Online transaction
         std::string strAddress = wtx.mapValue["to"];
         strHTML += "<b>" + tr("To") + ":</b> ";
-        CTxDestination dest = CBitcoinAddress(strAddress).Get();
+        CTxDestination dest = DecodeDestination(strAddress);
         if (wallet->mapAddressBook.count(dest) && !wallet->mapAddressBook[dest].name.empty())
             strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[dest].name) + " ";
         strHTML += GUIUtil::HtmlEscape(strAddress) + "<br>";
@@ -189,7 +188,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
                         strHTML += "<b>" + tr("To") + ":</b> ";
                         if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].name.empty())
                             strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + " ";
-                        strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(address).ToString());
+                        strHTML += GUIUtil::HtmlEscape(EncodeDestination(address));
                         if(toSelf == ISMINE_SPENDABLE)
                             strHTML += " (own address)";
                         else if(toSelf & ISMINE_WATCH_ONLY)
@@ -304,7 +303,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
                     {
                         if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].name.empty())
                             strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + " ";
-                        strHTML += QString::fromStdString(CBitcoinAddress(address).ToString());
+                        strHTML += QString::fromStdString(EncodeDestination(address));
                     }
                     strHTML = strHTML + " " + tr("Amount") + "=" + BitcoinUnits::formatHtmlWithUnit(unit, vout.nValue);
                     strHTML = strHTML + " IsMine=" + (wallet->IsMine(vout) & ISMINE_SPENDABLE ? tr("true") : tr("false")) + "</li>";

src/qt/transactionrecord.cpp

@@ -55,7 +55,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
                 {
                     // Received by Bitcoin Address
                     sub.type = TransactionRecord::RecvWithAddress;
-                    sub.address = CBitcoinAddress(address).ToString();
+                    sub.address = EncodeDestination(address);
                 }
                 else
                 {
@@ -127,7 +127,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
                 {
                     // Sent to Bitcoin Address
                     sub.type = TransactionRecord::SendToAddress;
-                    sub.address = CBitcoinAddress(address).ToString();
+                    sub.address = EncodeDestination(address);
                 }
                 else
                 {

src/qt/walletmodel.cpp

@@ -188,8 +188,7 @@ void WalletModel::updateWatchOnlyFlag(bool fHaveWatchonly)
 
 bool WalletModel::validateAddress(const QString &address)
 {
-    CBitcoinAddress addressParsed(address.toStdString());
-    return addressParsed.IsValid();
+    return IsValidDestinationString(address.toStdString());
 }
 
 WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransaction &transaction, const CCoinControl& coinControl)
@@ -247,7 +246,7 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
             setAddress.insert(rcp.address);
             ++nAddresses;
 
-            CScript scriptPubKey = GetScriptForDestination(CBitcoinAddress(rcp.address.toStdString()).Get());
+            CScript scriptPubKey = GetScriptForDestination(DecodeDestination(rcp.address.toStdString()));
             CRecipient recipient = {scriptPubKey, rcp.amount, rcp.fSubtractFeeFromAmount};
             vecSend.push_back(recipient);
 
@@ -348,7 +347,7 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
         if (!rcp.paymentRequest.IsInitialized())
         {
             std::string strAddress = rcp.address.toStdString();
-            CTxDestination dest = CBitcoinAddress(strAddress).Get();
+            CTxDestination dest = DecodeDestination(strAddress);
             std::string strLabel = rcp.label.toStdString();
             {
                 LOCK(wallet->cs_wallet);
@@ -464,7 +463,7 @@ static void NotifyAddressBookChanged(WalletModel *walletmodel, CWallet *wallet,
         const CTxDestination &address, const std::string &label, bool isMine,
         const std::string &purpose, ChangeType status)
 {
-    QString strAddress = QString::fromStdString(CBitcoinAddress(address).ToString());
+    QString strAddress = QString::fromStdString(EncodeDestination(address));
     QString strLabel = QString::fromStdString(label);
     QString strPurpose = QString::fromStdString(purpose);
 
@@ -596,7 +595,7 @@ bool WalletModel::isSpent(const COutPoint& outpoint) const
 void WalletModel::listCoins(std::map<QString, std::vector<COutput> >& mapCoins) const
 {
     for (auto& group : wallet->ListCoins()) {
-        auto& resultGroup = mapCoins[QString::fromStdString(CBitcoinAddress(group.first).ToString())];
+        auto& resultGroup = mapCoins[QString::fromStdString(EncodeDestination(group.first))];
         for (auto& coin : group.second) {
             resultGroup.emplace_back(std::move(coin));
         }
@@ -634,7 +633,7 @@ void WalletModel::loadReceiveRequests(std::vector<std::string>& vReceiveRequests
 
 bool WalletModel::saveReceiveRequest(const std::string &sAddress, const int64_t nId, const std::string &sRequest)
 {
-    CTxDestination dest = CBitcoinAddress(sAddress).Get();
+    CTxDestination dest = DecodeDestination(sAddress);
 
     std::stringstream ss;
     ss << nId;

src/rpc/mining.cpp

@@ -176,12 +176,13 @@ UniValue generatetoaddress(const JSONRPCRequest& request)
         nMaxTries = request.params[2].get_int();
     }
 
-    CBitcoinAddress address(request.params[1].get_str());
-    if (!address.IsValid())
+    CTxDestination destination = DecodeDestination(request.params[1].get_str());
+    if (!IsValidDestination(destination)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Error: Invalid address");
+    }
 
     std::shared_ptr<CReserveScript> coinbaseScript = std::make_shared<CReserveScript>();
-    coinbaseScript->reserveScript = GetScriptForDestination(address.Get());
+    coinbaseScript->reserveScript = GetScriptForDestination(destination);
 
     return generateBlocks(coinbaseScript, nGenerate, nMaxTries, false);
 }

src/rpc/misc.cpp

@@ -152,8 +152,9 @@ public:
             obj.push_back(Pair("script", GetTxnOutputType(whichType)));
             obj.push_back(Pair("hex", HexStr(subscript.begin(), subscript.end())));
             UniValue a(UniValue::VARR);
-            for (const CTxDestination& addr : addresses)
-                a.push_back(CBitcoinAddress(addr).ToString());
+            for (const CTxDestination& addr : addresses) {
+                a.push_back(EncodeDestination(addr));
+            }
             obj.push_back(Pair("addresses", a));
             if (whichType == TX_MULTISIG)
                 obj.push_back(Pair("sigsrequired", nRequired));
@@ -207,15 +208,14 @@ UniValue validateaddress(const JSONRPCRequest& request)
     LOCK(cs_main);
 #endif
 
-    CBitcoinAddress address(request.params[0].get_str());
-    bool isValid = address.IsValid();
+    CTxDestination dest = DecodeDestination(request.params[0].get_str());
+    bool isValid = IsValidDestination(dest);
 
     UniValue ret(UniValue::VOBJ);
     ret.push_back(Pair("isvalid", isValid));
     if (isValid)
     {
-        CTxDestination dest = address.Get();
-        std::string currentAddress = address.ToString();
+        std::string currentAddress = EncodeDestination(dest);
         ret.push_back(Pair("address", currentAddress));
 
         CScript scriptPubKey = GetScriptForDestination(dest);
@@ -230,10 +230,10 @@ UniValue validateaddress(const JSONRPCRequest& request)
         if (pwallet && pwallet->mapAddressBook.count(dest)) {
             ret.push_back(Pair("account", pwallet->mapAddressBook[dest].name));
         }
-        CKeyID keyID;
         if (pwallet) {
             const auto& meta = pwallet->mapKeyMetadata;
-            auto it = address.GetKeyID(keyID) ? meta.find(keyID) : meta.end();
+            const CKeyID *keyID = boost::get<CKeyID>(&dest);
+            auto it = keyID ? meta.find(*keyID) : meta.end();
             if (it == meta.end()) {
                 it = meta.find(CScriptID(scriptPubKey));
             }
@@ -277,16 +277,15 @@ CScript _createmultisig_redeemScript(CWallet * const pwallet, const UniValue& pa
         const std::string& ks = keys[i].get_str();
 #ifdef ENABLE_WALLET
         // Case 1: Bitcoin address and we have full public key:
-        CBitcoinAddress address(ks);
-        if (pwallet && address.IsValid()) {
-            CKeyID keyID;
-            if (!address.GetKeyID(keyID))
-                throw std::runtime_error(
-                    strprintf("%s does not refer to a key",ks));
+        CTxDestination dest = DecodeDestination(ks);
+        if (pwallet && IsValidDestination(dest)) {
+            const CKeyID *keyID = boost::get<CKeyID>(&dest);
+            if (!keyID) {
+                throw std::runtime_error(strprintf("%s does not refer to a key", ks));
+            }
             CPubKey vchPubKey;
-            if (!pwallet->GetPubKey(keyID, vchPubKey)) {
-                throw std::runtime_error(
-                    strprintf("no full public key for address %s",ks));
+            if (!pwallet->GetPubKey(*keyID, vchPubKey)) {
+                throw std::runtime_error(strprintf("no full public key for address %s", ks));
             }
             if (!vchPubKey.IsFullyValid())
                 throw std::runtime_error(" Invalid public key: "+ks);
@@ -357,10 +356,9 @@ UniValue createmultisig(const JSONRPCRequest& request)
     // Construct using pay-to-script-hash:
     CScript inner = _createmultisig_redeemScript(pwallet, request.params);
     CScriptID innerID(inner);
-    CBitcoinAddress address(innerID);
 
     UniValue result(UniValue::VOBJ);
-    result.push_back(Pair("address", address.ToString()));
+    result.push_back(Pair("address", EncodeDestination(innerID)));
     result.push_back(Pair("redeemScript", HexStr(inner.begin(), inner.end())));
 
     return result;
@@ -395,13 +393,15 @@ UniValue verifymessage(const JSONRPCRequest& request)
     std::string strSign     = request.params[1].get_str();
     std::string strMessage  = request.params[2].get_str();
 
-    CBitcoinAddress addr(strAddress);
-    if (!addr.IsValid())
+    CTxDestination destination = DecodeDestination(strAddress);
+    if (!IsValidDestination(destination)) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid address");
+    }
 
-    CKeyID keyID;
-    if (!addr.GetKeyID(keyID))
+    const CKeyID *keyID = boost::get<CKeyID>(&destination);
+    if (!keyID) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
+    }
 
     bool fInvalid = false;
     std::vector<unsigned char> vchSig = DecodeBase64(strSign.c_str(), &fInvalid);
@@ -417,7 +417,7 @@ UniValue verifymessage(const JSONRPCRequest& request)
     if (!pubkey.RecoverCompact(ss.GetHash(), vchSig))
         return false;
 
-    return (pubkey.GetID() == keyID);
+    return (pubkey.GetID() == *keyID);
 }
 
 UniValue signmessagewithprivkey(const JSONRPCRequest& request)

src/rpc/rawtransaction.cpp

@@ -384,7 +384,7 @@ UniValue createrawtransaction(const JSONRPCRequest& request)
         rawTx.vin.push_back(in);
     }
 
-    std::set<CBitcoinAddress> setAddress;
+    std::set<CTxDestination> destinations;
     std::vector<std::string> addrList = sendTo.getKeys();
     for (const std::string& name_ : addrList) {
 
@@ -394,15 +394,16 @@ UniValue createrawtransaction(const JSONRPCRequest& request)
             CTxOut out(0, CScript() << OP_RETURN << data);
             rawTx.vout.push_back(out);
         } else {
-            CBitcoinAddress address(name_);
-            if (!address.IsValid())
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ")+name_);
+            CTxDestination destination = DecodeDestination(name_);
+            if (!IsValidDestination(destination)) {
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ") + name_);
+            }
 
-            if (setAddress.count(address))
-                throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ")+name_);
-            setAddress.insert(address);
+            if (!destinations.insert(destination).second) {
+                throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ") + name_);
+            }
 
-            CScript scriptPubKey = GetScriptForDestination(address.Get());
+            CScript scriptPubKey = GetScriptForDestination(destination);
             CAmount nAmount = AmountFromValue(sendTo[name_]);
 
             CTxOut out(nAmount, scriptPubKey);
@@ -529,7 +530,7 @@ UniValue decodescript(const JSONRPCRequest& request)
     if (type.isStr() && type.get_str() != "scripthash") {
         // P2SH cannot be wrapped in a P2SH. If this script is already a P2SH,
         // don't return the address for a P2SH of the P2SH.
-        r.push_back(Pair("p2sh", CBitcoinAddress(CScriptID(script)).ToString()));
+        r.push_back(Pair("p2sh", EncodeDestination(CScriptID(script))));
     }
 
     return r;

src/script/standard.cpp

@@ -317,3 +317,7 @@ CScript GetScriptForWitness(const CScript& redeemscript)
     ret << OP_0 << ToByteVector(hash);
     return ret;
 }
+
+bool IsValidDestination(const CTxDestination& dest) {
+    return dest.which() != 0;
+}

src/script/standard.h

@@ -77,10 +77,13 @@ public:
  *  * CNoDestination: no destination set
  *  * CKeyID: TX_PUBKEYHASH destination
  *  * CScriptID: TX_SCRIPTHASH destination
- *  A CTxDestination is the internal data type encoded in a CBitcoinAddress
+ *  A CTxDestination is the internal data type encoded in a bitcoin address
  */
 typedef boost::variant<CNoDestination, CKeyID, CScriptID> CTxDestination;
 
+/** Check whether a CTxDestination is a CNoDestination. */
+bool IsValidDestination(const CTxDestination& dest);
+
 /** Get the name of a txnouttype as a C string, or nullptr if unknown. */
 const char* GetTxnOutputType(txnouttype t);
 

src/test/base58_tests.cpp

@@ -121,7 +121,7 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_parse)
 {
     UniValue tests = read_json(std::string(json_tests::base58_keys_valid, json_tests::base58_keys_valid + sizeof(json_tests::base58_keys_valid)));
     CBitcoinSecret secret;
-    CBitcoinAddress addr;
+    CTxDestination destination;
     SelectParams(CBaseChainParams::MAIN);
 
     for (unsigned int idx = 0; idx < tests.size(); idx++) {
@@ -145,7 +145,6 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_parse)
         {
             bool isCompressed = find_value(metadata, "isCompressed").get_bool();
             // Must be valid private key
-            // Note: CBitcoinSecret::SetString tests isValid, whereas CBitcoinAddress does not!
             BOOST_CHECK_MESSAGE(secret.SetString(exp_base58string), "!SetString:"+ strTest);
             BOOST_CHECK_MESSAGE(secret.IsValid(), "!IsValid:" + strTest);
             CKey privkey = secret.GetKey();
@@ -153,18 +152,17 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_parse)
             BOOST_CHECK_MESSAGE(privkey.size() == exp_payload.size() && std::equal(privkey.begin(), privkey.end(), exp_payload.begin()), "key mismatch:" + strTest);
 
             // Private key must be invalid public key
-            addr.SetString(exp_base58string);
-            BOOST_CHECK_MESSAGE(!addr.IsValid(), "IsValid privkey as pubkey:" + strTest);
+            destination = DecodeDestination(exp_base58string);
+            BOOST_CHECK_MESSAGE(!IsValidDestination(destination), "IsValid privkey as pubkey:" + strTest);
         }
         else
         {
             std::string exp_addrType = find_value(metadata, "addrType").get_str(); // "script" or "pubkey"
             // Must be valid public key
-            BOOST_CHECK_MESSAGE(addr.SetString(exp_base58string), "SetString:" + strTest);
-            BOOST_CHECK_MESSAGE(addr.IsValid(), "!IsValid:" + strTest);
-            BOOST_CHECK_MESSAGE(addr.IsScript() == (exp_addrType == "script"), "isScript mismatch" + strTest);
-            CTxDestination dest = addr.Get();
-            BOOST_CHECK_MESSAGE(boost::apply_visitor(TestAddrTypeVisitor(exp_addrType), dest), "addrType mismatch" + strTest);
+            destination = DecodeDestination(exp_base58string);
+            BOOST_CHECK_MESSAGE(IsValidDestination(destination), "!IsValid:" + strTest);
+            BOOST_CHECK_MESSAGE((boost::get<CScriptID>(&destination) != nullptr) == (exp_addrType == "script"), "isScript mismatch" + strTest);
+            BOOST_CHECK_MESSAGE(boost::apply_visitor(TestAddrTypeVisitor(exp_addrType), destination), "addrType mismatch" + strTest);
 
             // Public key must be invalid private key
             secret.SetString(exp_base58string);
@@ -226,17 +224,11 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_gen)
                 BOOST_ERROR("Bad addrtype: " << strTest);
                 continue;
             }
-            CBitcoinAddress addrOut;
-            BOOST_CHECK_MESSAGE(addrOut.Set(dest), "encode dest: " + strTest);
-            BOOST_CHECK_MESSAGE(addrOut.ToString() == exp_base58string, "mismatch: " + strTest);
+            std::string address = EncodeDestination(dest);
+            BOOST_CHECK_MESSAGE(address == exp_base58string, "mismatch: " + strTest);
         }
     }
 
-    // Visiting a CNoDestination must fail
-    CBitcoinAddress dummyAddr;
-    CTxDestination nodest = CNoDestination();
-    BOOST_CHECK(!dummyAddr.Set(nodest));
-
     SelectParams(CBaseChainParams::MAIN);
 }
 
@@ -245,7 +237,7 @@ BOOST_AUTO_TEST_CASE(base58_keys_invalid)
 {
     UniValue tests = read_json(std::string(json_tests::base58_keys_invalid, json_tests::base58_keys_invalid + sizeof(json_tests::base58_keys_invalid))); // Negative testcases
     CBitcoinSecret secret;
-    CBitcoinAddress addr;
+    CTxDestination destination;
 
     for (unsigned int idx = 0; idx < tests.size(); idx++) {
         UniValue test = tests[idx];
@@ -258,8 +250,8 @@ BOOST_AUTO_TEST_CASE(base58_keys_invalid)
         std::string exp_base58string = test[0].get_str();
 
         // must be invalid as public and as private key
-        addr.SetString(exp_base58string);
-        BOOST_CHECK_MESSAGE(!addr.IsValid(), "IsValid pubkey:" + strTest);
+        destination = DecodeDestination(exp_base58string);
+        BOOST_CHECK_MESSAGE(!IsValidDestination(destination), "IsValid pubkey:" + strTest);
         secret.SetString(exp_base58string);
         BOOST_CHECK_MESSAGE(!secret.IsValid(), "IsValid privkey:" + strTest);
     }

src/test/key_tests.cpp

@@ -16,17 +16,16 @@
 
 #include <boost/test/unit_test.hpp>
 
-static const std::string strSecret1     ("5HxWvvfubhXpYYpS3tJkw6fq9jE9j18THftkZjHHfmFiWtmAbrj");
-static const std::string strSecret2     ("5KC4ejrDjv152FGwP386VD1i2NYc5KkfSMyv1nGy1VGDxGHqVY3");
-static const std::string strSecret1C    ("Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw");
-static const std::string strSecret2C    ("L3Hq7a8FEQwJkW1M2GNKDW28546Vp5miewcCzSqUD9kCAXrJdS3g");
-static const CBitcoinAddress addr1 ("1QFqqMUD55ZV3PJEJZtaKCsQmjLT6JkjvJ");
-static const CBitcoinAddress addr2 ("1F5y5E5FMc5YzdJtB9hLaUe43GDxEKXENJ");
-static const CBitcoinAddress addr1C("1NoJrossxPBKfCHuJXT4HadJrXRE9Fxiqs");
-static const CBitcoinAddress addr2C("1CRj2HyM1CXWzHAXLQtiGLyggNT9WQqsDs");
+static const std::string strSecret1 = "5HxWvvfubhXpYYpS3tJkw6fq9jE9j18THftkZjHHfmFiWtmAbrj";
+static const std::string strSecret2 = "5KC4ejrDjv152FGwP386VD1i2NYc5KkfSMyv1nGy1VGDxGHqVY3";
+static const std::string strSecret1C = "Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw";
+static const std::string strSecret2C = "L3Hq7a8FEQwJkW1M2GNKDW28546Vp5miewcCzSqUD9kCAXrJdS3g";
+static const std::string addr1 = "1QFqqMUD55ZV3PJEJZtaKCsQmjLT6JkjvJ";
+static const std::string addr2 = "1F5y5E5FMc5YzdJtB9hLaUe43GDxEKXENJ";
+static const std::string addr1C = "1NoJrossxPBKfCHuJXT4HadJrXRE9Fxiqs";
+static const std::string addr2C = "1CRj2HyM1CXWzHAXLQtiGLyggNT9WQqsDs";
 
-
-static const std::string strAddressBad("1HV9Lc3sNHZxwj4Zk6fB38tEmBryq2cBiF");
+static const std::string strAddressBad = "1HV9Lc3sNHZxwj4Zk6fB38tEmBryq2cBiF";
 
 
 BOOST_FIXTURE_TEST_SUITE(key_tests, BasicTestingSetup)
@@ -74,10 +73,10 @@ BOOST_AUTO_TEST_CASE(key_test1)
     BOOST_CHECK(!key2C.VerifyPubKey(pubkey2));
     BOOST_CHECK(key2C.VerifyPubKey(pubkey2C));
 
-    BOOST_CHECK(addr1.Get()  == CTxDestination(pubkey1.GetID()));
-    BOOST_CHECK(addr2.Get()  == CTxDestination(pubkey2.GetID()));
-    BOOST_CHECK(addr1C.Get() == CTxDestination(pubkey1C.GetID()));
-    BOOST_CHECK(addr2C.Get() == CTxDestination(pubkey2C.GetID()));
+    BOOST_CHECK(DecodeDestination(addr1)  == CTxDestination(pubkey1.GetID()));
+    BOOST_CHECK(DecodeDestination(addr2)  == CTxDestination(pubkey2.GetID()));
+    BOOST_CHECK(DecodeDestination(addr1C) == CTxDestination(pubkey1C.GetID()));
+    BOOST_CHECK(DecodeDestination(addr2C) == CTxDestination(pubkey2C.GetID()));
 
     for (int n=0; n<16; n++)
     {

src/wallet/rpcdump.cpp

@@ -181,7 +181,7 @@ UniValue abortrescan(const JSONRPCRequest& request)
     return true;
 }
 
-void ImportAddress(CWallet*, const CBitcoinAddress& address, const std::string& strLabel);
+void ImportAddress(CWallet*, const CTxDestination& dest, const std::string& strLabel);
 void ImportScript(CWallet* const pwallet, const CScript& script, const std::string& strLabel, bool isRedeemScript)
 {
     if (!isRedeemScript && ::IsMine(*pwallet, script) == ISMINE_SPENDABLE) {
@@ -198,7 +198,7 @@ void ImportScript(CWallet* const pwallet, const CScript& script, const std::stri
         if (!pwallet->HaveCScript(script) && !pwallet->AddCScript(script)) {
             throw JSONRPCError(RPC_WALLET_ERROR, "Error adding p2sh redeemScript to wallet");
         }
-        ImportAddress(pwallet, CBitcoinAddress(CScriptID(script)), strLabel);
+        ImportAddress(pwallet, CScriptID(script), strLabel);
     } else {
         CTxDestination destination;
         if (ExtractDestination(script, destination)) {
@@ -207,13 +207,13 @@ void ImportScript(CWallet* const pwallet, const CScript& script, const std::stri
     }
 }
 
-void ImportAddress(CWallet* const pwallet, const CBitcoinAddress& address, const std::string& strLabel)
+void ImportAddress(CWallet* const pwallet, const CTxDestination& dest, const std::string& strLabel)
 {
-    CScript script = GetScriptForDestination(address.Get());
+    CScript script = GetScriptForDestination(dest);
     ImportScript(pwallet, script, strLabel, false);
     // add to address book or update label
-    if (address.IsValid())
-        pwallet->SetAddressBook(address.Get(), strLabel, "receive");
+    if (IsValidDestination(dest))
+        pwallet->SetAddressBook(dest, strLabel, "receive");
 }
 
 UniValue importaddress(const JSONRPCRequest& request)
@@ -265,11 +265,12 @@ UniValue importaddress(const JSONRPCRequest& request)
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
-    CBitcoinAddress address(request.params[0].get_str());
-    if (address.IsValid()) {
-        if (fP2SH)
+    CTxDestination dest = DecodeDestination(request.params[0].get_str());
+    if (IsValidDestination(dest)) {
+        if (fP2SH) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Cannot use the p2sh flag with an address - use a script instead");
-        ImportAddress(pwallet, address, strLabel);
+        }
+        ImportAddress(pwallet, dest, strLabel);
     } else if (IsHex(request.params[0].get_str())) {
         std::vector<unsigned char> data(ParseHex(request.params[0].get_str()));
         ImportScript(pwallet, CScript(data.begin(), data.end()), strLabel, fP2SH);
@@ -432,7 +433,7 @@ UniValue importpubkey(const JSONRPCRequest& request)
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
-    ImportAddress(pwallet, CBitcoinAddress(pubKey.GetID()), strLabel);
+    ImportAddress(pwallet, pubKey.GetID(), strLabel);
     ImportScript(pwallet, GetScriptForRawPubKey(pubKey), strLabel, false);
 
     if (fRescan)
@@ -506,7 +507,7 @@ UniValue importwallet(const JSONRPCRequest& request)
         assert(key.VerifyPubKey(pubkey));
         CKeyID keyid = pubkey.GetID();
         if (pwallet->HaveKey(keyid)) {
-            LogPrintf("Skipping import of %s (key already present)\n", CBitcoinAddress(keyid).ToString());
+            LogPrintf("Skipping import of %s (key already present)\n", EncodeDestination(keyid));
             continue;
         }
         int64_t nTime = DecodeDumpTime(vstr[1]);
@@ -524,7 +525,7 @@ UniValue importwallet(const JSONRPCRequest& request)
                 fLabel = true;
             }
         }
-        LogPrintf("Importing %s...\n", CBitcoinAddress(keyid).ToString());
+        LogPrintf("Importing %s...\n", EncodeDestination(keyid));
         if (!pwallet->AddKeyPubKey(key, pubkey)) {
             fGood = false;
             continue;
@@ -573,14 +574,16 @@ UniValue dumpprivkey(const JSONRPCRequest& request)
     EnsureWalletIsUnlocked(pwallet);
 
     std::string strAddress = request.params[0].get_str();
-    CBitcoinAddress address;
-    if (!address.SetString(strAddress))
+    CTxDestination dest = DecodeDestination(strAddress);
+    if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
-    CKeyID keyID;
-    if (!address.GetKeyID(keyID))
+    }
+    const CKeyID *keyID = boost::get<CKeyID>(&dest);
+    if (!keyID) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to a key");
+    }
     CKey vchSecret;
-    if (!pwallet->GetKey(keyID, vchSecret)) {
+    if (!pwallet->GetKey(*keyID, vchSecret)) {
         throw JSONRPCError(RPC_WALLET_ERROR, "Private key for address " + strAddress + " is not known");
     }
     return CBitcoinSecret(vchSecret).ToString();
@@ -659,7 +662,7 @@ UniValue dumpwallet(const JSONRPCRequest& request)
     for (std::vector<std::pair<int64_t, CKeyID> >::const_iterator it = vKeyBirth.begin(); it != vKeyBirth.end(); it++) {
         const CKeyID &keyid = it->second;
         std::string strTime = EncodeDumpTime(it->first);
-        std::string strAddr = CBitcoinAddress(keyid).ToString();
+        std::string strAddr = EncodeDestination(keyid);
         CKey key;
         if (pwallet->GetKey(keyid, key)) {
             file << strprintf("%s %s ", CBitcoinSecret(key).ToString(), strTime);
@@ -715,14 +718,14 @@ UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, const int6
 
         // Parse the output.
         CScript script;
-        CBitcoinAddress address;
+        CTxDestination dest;
 
         if (!isScript) {
-            address = CBitcoinAddress(output);
-            if (!address.IsValid()) {
+            dest = DecodeDestination(output);
+            if (!IsValidDestination(dest)) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
             }
-            script = GetScriptForDestination(address.Get());
+            script = GetScriptForDestination(dest);
         } else {
             if (!IsHex(output)) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid scriptPubKey");
@@ -780,8 +783,8 @@ UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, const int6
                 throw JSONRPCError(RPC_WALLET_ERROR, "Error adding p2sh redeemScript to wallet");
             }
 
-            CBitcoinAddress redeemAddress = CBitcoinAddress(CScriptID(redeemScript));
-            CScript redeemDestination = GetScriptForDestination(redeemAddress.Get());
+            CTxDestination redeem_dest = CScriptID(redeemScript);
+            CScript redeemDestination = GetScriptForDestination(redeem_dest);
 
             if (::IsMine(*pwallet, redeemDestination) == ISMINE_SPENDABLE) {
                 throw JSONRPCError(RPC_WALLET_ERROR, "The wallet already contains the private key for this address or script");
@@ -794,8 +797,8 @@ UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, const int6
             }
 
             // add to address book or update label
-            if (address.IsValid()) {
-                pwallet->SetAddressBook(address.Get(), label, "receive");
+            if (IsValidDestination(dest)) {
+                pwallet->SetAddressBook(dest, label, "receive");
             }
 
             // Import private keys.
@@ -854,27 +857,25 @@ UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, const int6
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Pubkey is not a valid public key");
                 }
 
-                CBitcoinAddress pubKeyAddress = CBitcoinAddress(pubKey.GetID());
+                CTxDestination pubkey_dest = pubKey.GetID();
 
                 // Consistency check.
-                if (!isScript && !(pubKeyAddress.Get() == address.Get())) {
+                if (!isScript && !(pubkey_dest == dest)) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Consistency check failed");
                 }
 
                 // Consistency check.
                 if (isScript) {
-                    CBitcoinAddress scriptAddress;
                     CTxDestination destination;
 
                     if (ExtractDestination(script, destination)) {
-                        scriptAddress = CBitcoinAddress(destination);
-                        if (!(scriptAddress.Get() == pubKeyAddress.Get())) {
+                        if (!(destination == pubkey_dest)) {
                             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Consistency check failed");
                         }
                     }
                 }
 
-                CScript pubKeyScript = GetScriptForDestination(pubKeyAddress.Get());
+                CScript pubKeyScript = GetScriptForDestination(pubkey_dest);
 
                 if (::IsMine(*pwallet, pubKeyScript) == ISMINE_SPENDABLE) {
                     throw JSONRPCError(RPC_WALLET_ERROR, "The wallet already contains the private key for this address or script");
@@ -887,8 +888,8 @@ UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, const int6
                 }
 
                 // add to address book or update label
-                if (pubKeyAddress.IsValid()) {
-                    pwallet->SetAddressBook(pubKeyAddress.Get(), label, "receive");
+                if (IsValidDestination(pubkey_dest)) {
+                    pwallet->SetAddressBook(pubkey_dest, label, "receive");
                 }
 
                 // TODO Is this necessary?
@@ -927,21 +928,19 @@ UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, const int6
                 CPubKey pubKey = key.GetPubKey();
                 assert(key.VerifyPubKey(pubKey));
 
-                CBitcoinAddress pubKeyAddress = CBitcoinAddress(pubKey.GetID());
+                CTxDestination pubkey_dest = pubKey.GetID();
 
                 // Consistency check.
-                if (!isScript && !(pubKeyAddress.Get() == address.Get())) {
+                if (!isScript && !(pubkey_dest == dest)) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Consistency check failed");
                 }
 
                 // Consistency check.
                 if (isScript) {
-                    CBitcoinAddress scriptAddress;
                     CTxDestination destination;
 
                     if (ExtractDestination(script, destination)) {
-                        scriptAddress = CBitcoinAddress(destination);
-                        if (!(scriptAddress.Get() == pubKeyAddress.Get())) {
+                        if (!(destination == pubkey_dest)) {
                             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Consistency check failed");
                         }
                     }
@@ -980,8 +979,8 @@ UniValue ProcessImport(CWallet * const pwallet, const UniValue& data, const int6
 
                 if (scriptPubKey.getType() == UniValue::VOBJ) {
                     // add to address book or update label
-                    if (address.IsValid()) {
-                        pwallet->SetAddressBook(address.Get(), label, "receive");
+                    if (IsValidDestination(dest)) {
+                        pwallet->SetAddressBook(dest, label, "receive");
                     }
                 }
 

src/wallet/rpcwallet.cpp

@@ -170,18 +170,18 @@ UniValue getnewaddress(const JSONRPCRequest& request)
 
     pwallet->SetAddressBook(keyID, strAccount, "receive");
 
-    return CBitcoinAddress(keyID).ToString();
+    return EncodeDestination(keyID);
 }
 
 
-CBitcoinAddress GetAccountAddress(CWallet* const pwallet, std::string strAccount, bool bForceNew=false)
+CTxDestination GetAccountAddress(CWallet* const pwallet, std::string strAccount, bool bForceNew=false)
 {
     CPubKey pubKey;
     if (!pwallet->GetAccountPubkey(pubKey, strAccount, bForceNew)) {
         throw JSONRPCError(RPC_WALLET_KEYPOOL_RAN_OUT, "Error: Keypool ran out, please call keypoolrefill first");
     }
 
-    return CBitcoinAddress(pubKey.GetID());
+    return pubKey.GetID();
 }
 
 UniValue getaccountaddress(const JSONRPCRequest& request)
@@ -213,7 +213,7 @@ UniValue getaccountaddress(const JSONRPCRequest& request)
 
     UniValue ret(UniValue::VSTR);
 
-    ret = GetAccountAddress(pwallet, strAccount).ToString();
+    ret = EncodeDestination(GetAccountAddress(pwallet, strAccount));
     return ret;
 }
 
@@ -252,7 +252,7 @@ UniValue getrawchangeaddress(const JSONRPCRequest& request)
 
     CKeyID keyID = vchPubKey.GetID();
 
-    return CBitcoinAddress(keyID).ToString();
+    return EncodeDestination(keyID);
 }
 
 
@@ -277,24 +277,25 @@ UniValue setaccount(const JSONRPCRequest& request)
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
-    CBitcoinAddress address(request.params[0].get_str());
-    if (!address.IsValid())
+    CTxDestination dest = DecodeDestination(request.params[0].get_str());
+    if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+    }
 
     std::string strAccount;
     if (!request.params[1].isNull())
         strAccount = AccountFromValue(request.params[1]);
 
     // Only add the account if the address is yours.
-    if (IsMine(*pwallet, address.Get())) {
+    if (IsMine(*pwallet, dest)) {
         // Detect when changing the account of an address that is the 'unused current key' of another account:
-        if (pwallet->mapAddressBook.count(address.Get())) {
-            std::string strOldAccount = pwallet->mapAddressBook[address.Get()].name;
-            if (address == GetAccountAddress(pwallet, strOldAccount)) {
+        if (pwallet->mapAddressBook.count(dest)) {
+            std::string strOldAccount = pwallet->mapAddressBook[dest].name;
+            if (dest == GetAccountAddress(pwallet, strOldAccount)) {
                 GetAccountAddress(pwallet, strOldAccount, true);
             }
         }
-        pwallet->SetAddressBook(address.Get(), strAccount, "receive");
+        pwallet->SetAddressBook(dest, strAccount, "receive");
     }
     else
         throw JSONRPCError(RPC_MISC_ERROR, "setaccount can only be used with own address");
@@ -325,12 +326,13 @@ UniValue getaccount(const JSONRPCRequest& request)
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
-    CBitcoinAddress address(request.params[0].get_str());
-    if (!address.IsValid())
+    CTxDestination dest = DecodeDestination(request.params[0].get_str());
+    if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+    }
 
     std::string strAccount;
-    std::map<CTxDestination, CAddressBookData>::iterator mi = pwallet->mapAddressBook.find(address.Get());
+    std::map<CTxDestination, CAddressBookData>::iterator mi = pwallet->mapAddressBook.find(dest);
     if (mi != pwallet->mapAddressBook.end() && !(*mi).second.name.empty()) {
         strAccount = (*mi).second.name;
     }
@@ -367,11 +369,12 @@ UniValue getaddressesbyaccount(const JSONRPCRequest& request)
 
     // Find all addresses that have the given account
     UniValue ret(UniValue::VARR);
-    for (const std::pair<CBitcoinAddress, CAddressBookData>& item : pwallet->mapAddressBook) {
-        const CBitcoinAddress& address = item.first;
+    for (const std::pair<CTxDestination, CAddressBookData>& item : pwallet->mapAddressBook) {
+        const CTxDestination& dest = item.first;
         const std::string& strName = item.second.name;
-        if (strName == strAccount)
-            ret.push_back(address.ToString());
+        if (strName == strAccount) {
+            ret.push_back(EncodeDestination(dest));
+        }
     }
     return ret;
 }
@@ -454,9 +457,10 @@ UniValue sendtoaddress(const JSONRPCRequest& request)
     ObserveSafeMode();
     LOCK2(cs_main, pwallet->cs_wallet);
 
-    CBitcoinAddress address(request.params[0].get_str());
-    if (!address.IsValid())
-        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+    CTxDestination dest = DecodeDestination(request.params[0].get_str());
+    if (!IsValidDestination(dest)) {
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
+    }
 
     // Amount
     CAmount nAmount = AmountFromValue(request.params[1]);
@@ -493,7 +497,7 @@ UniValue sendtoaddress(const JSONRPCRequest& request)
 
     EnsureWalletIsUnlocked(pwallet);
 
-    SendMoney(pwallet, address.Get(), nAmount, fSubtractFeeFromAmount, wtx, coin_control);
+    SendMoney(pwallet, dest, nAmount, fSubtractFeeFromAmount, wtx, coin_control);
 
     return wtx.GetHash().GetHex();
 }
@@ -533,16 +537,16 @@ UniValue listaddressgroupings(const JSONRPCRequest& request)
 
     UniValue jsonGroupings(UniValue::VARR);
     std::map<CTxDestination, CAmount> balances = pwallet->GetAddressBalances();
-    for (std::set<CTxDestination> grouping : pwallet->GetAddressGroupings()) {
+    for (const std::set<CTxDestination>& grouping : pwallet->GetAddressGroupings()) {
         UniValue jsonGrouping(UniValue::VARR);
-        for (CTxDestination address : grouping)
+        for (const CTxDestination& address : grouping)
         {
             UniValue addressInfo(UniValue::VARR);
-            addressInfo.push_back(CBitcoinAddress(address).ToString());
+            addressInfo.push_back(EncodeDestination(address));
             addressInfo.push_back(ValueFromAmount(balances[address]));
             {
-                if (pwallet->mapAddressBook.find(CBitcoinAddress(address).Get()) != pwallet->mapAddressBook.end()) {
-                    addressInfo.push_back(pwallet->mapAddressBook.find(CBitcoinAddress(address).Get())->second.name);
+                if (pwallet->mapAddressBook.find(address) != pwallet->mapAddressBook.end()) {
+                    addressInfo.push_back(pwallet->mapAddressBook.find(address)->second.name);
                 }
             }
             jsonGrouping.push_back(addressInfo);
@@ -587,16 +591,18 @@ UniValue signmessage(const JSONRPCRequest& request)
     std::string strAddress = request.params[0].get_str();
     std::string strMessage = request.params[1].get_str();
 
-    CBitcoinAddress addr(strAddress);
-    if (!addr.IsValid())
+    CTxDestination dest = DecodeDestination(strAddress);
+    if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid address");
+    }
 
-    CKeyID keyID;
-    if (!addr.GetKeyID(keyID))
+    const CKeyID *keyID = boost::get<CKeyID>(&dest);
+    if (!keyID) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
+    }
 
     CKey key;
-    if (!pwallet->GetKey(keyID, key)) {
+    if (!pwallet->GetKey(*keyID, key)) {
         throw JSONRPCError(RPC_WALLET_ERROR, "Private key not available");
     }
 
@@ -642,10 +648,11 @@ UniValue getreceivedbyaddress(const JSONRPCRequest& request)
     LOCK2(cs_main, pwallet->cs_wallet);
 
     // Bitcoin address
-    CBitcoinAddress address = CBitcoinAddress(request.params[0].get_str());
-    if (!address.IsValid())
+    CTxDestination dest = DecodeDestination(request.params[0].get_str());
+    if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
-    CScript scriptPubKey = GetScriptForDestination(address.Get());
+    }
+    CScript scriptPubKey = GetScriptForDestination(dest);
     if (!IsMine(*pwallet, scriptPubKey)) {
         return ValueFromAmount(0);
     }
@@ -915,9 +922,10 @@ UniValue sendfrom(const JSONRPCRequest& request)
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::string strAccount = AccountFromValue(request.params[0]);
-    CBitcoinAddress address(request.params[1].get_str());
-    if (!address.IsValid())
+    CTxDestination dest = DecodeDestination(request.params[1].get_str());
+    if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+    }
     CAmount nAmount = AmountFromValue(request.params[2]);
     if (nAmount <= 0)
         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount for send");
@@ -940,7 +948,7 @@ UniValue sendfrom(const JSONRPCRequest& request)
         throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS, "Account has insufficient funds");
 
     CCoinControl no_coin_control; // This is a deprecated API
-    SendMoney(pwallet, address.Get(), nAmount, false, wtx, no_coin_control);
+    SendMoney(pwallet, dest, nAmount, false, wtx, no_coin_control);
 
     return wtx.GetHash().GetHex();
 }
@@ -1032,22 +1040,23 @@ UniValue sendmany(const JSONRPCRequest& request)
         }
     }
 
-    std::set<CBitcoinAddress> setAddress;
+    std::set<CTxDestination> destinations;
     std::vector<CRecipient> vecSend;
 
     CAmount totalAmount = 0;
     std::vector<std::string> keys = sendTo.getKeys();
-    for (const std::string& name_ : keys)
-    {
-        CBitcoinAddress address(name_);
-        if (!address.IsValid())
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ")+name_);
+    for (const std::string& name_ : keys) {
+        CTxDestination dest = DecodeDestination(name_);
+        if (!IsValidDestination(dest)) {
+            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ") + name_);
+        }
 
-        if (setAddress.count(address))
-            throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ")+name_);
-        setAddress.insert(address);
+        if (destinations.count(dest)) {
+            throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ") + name_);
+        }
+        destinations.insert(dest);
 
-        CScript scriptPubKey = GetScriptForDestination(address.Get());
+        CScript scriptPubKey = GetScriptForDestination(dest);
         CAmount nAmount = AmountFromValue(sendTo[name_]);
         if (nAmount <= 0)
             throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount for send");
@@ -1138,7 +1147,7 @@ UniValue addmultisigaddress(const JSONRPCRequest& request)
     pwallet->AddCScript(inner);
 
     pwallet->SetAddressBook(innerID, strAccount, "send");
-    return CBitcoinAddress(innerID).ToString();
+    return EncodeDestination(innerID);
 }
 
 class Witnessifier : public boost::static_visitor<bool>
@@ -1226,12 +1235,12 @@ UniValue addwitnessaddress(const JSONRPCRequest& request)
         }
     }
 
-    CBitcoinAddress address(request.params[0].get_str());
-    if (!address.IsValid())
+    CTxDestination dest = DecodeDestination(request.params[0].get_str());
+    if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+    }
 
     Witnessifier w(pwallet);
-    CTxDestination dest = address.Get();
     bool ret = boost::apply_visitor(w, dest);
     if (!ret) {
         throw JSONRPCError(RPC_WALLET_ERROR, "Public key or redeemscript not known to wallet, or the key is uncompressed");
@@ -1239,7 +1248,7 @@ UniValue addwitnessaddress(const JSONRPCRequest& request)
 
     pwallet->SetAddressBook(w.result, "", "receive");
 
-    return CBitcoinAddress(w.result).ToString();
+    return EncodeDestination(w.result);
 }
 
 struct tallyitem
@@ -1274,7 +1283,7 @@ UniValue ListReceived(CWallet * const pwallet, const UniValue& params, bool fByA
             filter = filter | ISMINE_WATCH_ONLY;
 
     // Tally
-    std::map<CBitcoinAddress, tallyitem> mapTally;
+    std::map<CTxDestination, tallyitem> mapTally;
     for (const std::pair<uint256, CWalletTx>& pairWtx : pwallet->mapWallet) {
         const CWalletTx& wtx = pairWtx.second;
 
@@ -1307,10 +1316,10 @@ UniValue ListReceived(CWallet * const pwallet, const UniValue& params, bool fByA
     // Reply
     UniValue ret(UniValue::VARR);
     std::map<std::string, tallyitem> mapAccountTally;
-    for (const std::pair<CBitcoinAddress, CAddressBookData>& item : pwallet->mapAddressBook) {
-        const CBitcoinAddress& address = item.first;
+    for (const std::pair<CTxDestination, CAddressBookData>& item : pwallet->mapAddressBook) {
+        const CTxDestination& dest = item.first;
         const std::string& strAccount = item.second.name;
-        std::map<CBitcoinAddress, tallyitem>::iterator it = mapTally.find(address);
+        std::map<CTxDestination, tallyitem>::iterator it = mapTally.find(dest);
         if (it == mapTally.end() && !fIncludeEmpty)
             continue;
 
@@ -1336,7 +1345,7 @@ UniValue ListReceived(CWallet * const pwallet, const UniValue& params, bool fByA
             UniValue obj(UniValue::VOBJ);
             if(fIsWatchonly)
                 obj.push_back(Pair("involvesWatchonly", true));
-            obj.push_back(Pair("address",       address.ToString()));
+            obj.push_back(Pair("address",       EncodeDestination(dest)));
             obj.push_back(Pair("account",       strAccount));
             obj.push_back(Pair("amount",        ValueFromAmount(nAmount)));
             obj.push_back(Pair("confirmations", (nConf == std::numeric_limits<int>::max() ? 0 : nConf)));
@@ -1461,9 +1470,9 @@ UniValue listreceivedbyaccount(const JSONRPCRequest& request)
 
 static void MaybePushAddress(UniValue & entry, const CTxDestination &dest)
 {
-    CBitcoinAddress addr;
-    if (addr.Set(dest))
-        entry.push_back(Pair("address", addr.ToString()));
+    if (IsValidDestination(dest)) {
+        entry.push_back(Pair("address", EncodeDestination(dest)));
+    }
 }
 
 /**
@@ -2717,18 +2726,19 @@ UniValue listunspent(const JSONRPCRequest& request)
         nMaxDepth = request.params[1].get_int();
     }
 
-    std::set<CBitcoinAddress> setAddress;
+    std::set<CTxDestination> destinations;
     if (!request.params[2].isNull()) {
         RPCTypeCheckArgument(request.params[2], UniValue::VARR);
         UniValue inputs = request.params[2].get_array();
         for (unsigned int idx = 0; idx < inputs.size(); idx++) {
             const UniValue& input = inputs[idx];
-            CBitcoinAddress address(input.get_str());
-            if (!address.IsValid())
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ")+input.get_str());
-            if (setAddress.count(address))
-                throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ")+input.get_str());
-           setAddress.insert(address);
+            CTxDestination dest = DecodeDestination(input.get_str());
+            if (!IsValidDestination(dest)) {
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ") + input.get_str());
+            }
+            if (!destinations.insert(dest).second) {
+                throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ") + input.get_str());
+            }
         }
     }
 
@@ -2770,7 +2780,7 @@ UniValue listunspent(const JSONRPCRequest& request)
         const CScript& scriptPubKey = out.tx->tx->vout[out.i].scriptPubKey;
         bool fValidAddress = ExtractDestination(scriptPubKey, address);
 
-        if (setAddress.size() && (!fValidAddress || !setAddress.count(address)))
+        if (destinations.size() && (!fValidAddress || !destinations.count(address)))
             continue;
 
         UniValue entry(UniValue::VOBJ);
@@ -2778,7 +2788,7 @@ UniValue listunspent(const JSONRPCRequest& request)
         entry.push_back(Pair("vout", out.i));
 
         if (fValidAddress) {
-            entry.push_back(Pair("address", CBitcoinAddress(address).ToString()));
+            entry.push_back(Pair("address", EncodeDestination(address)));
 
             if (pwallet->mapAddressBook.count(address)) {
                 entry.push_back(Pair("account", pwallet->mapAddressBook[address].name));
@@ -2901,12 +2911,13 @@ UniValue fundrawtransaction(const JSONRPCRequest& request)
             true, true);
 
         if (options.exists("changeAddress")) {
-            CBitcoinAddress address(options["changeAddress"].get_str());
+            CTxDestination dest = DecodeDestination(options["changeAddress"].get_str());
 
-            if (!address.IsValid())
+            if (!IsValidDestination(dest)) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "changeAddress must be a valid bitcoin address");
+            }
 
-            coinControl.destChange = address.Get();
+            coinControl.destChange = dest;
         }
 
         if (options.exists("changePosition"))

src/wallet/wallet.cpp

@@ -307,7 +307,7 @@ bool CWallet::LoadCScript(const CScript& redeemScript)
      * these. Do not add them to the wallet and warn. */
     if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE)
     {
-        std::string strAddr = CBitcoinAddress(CScriptID(redeemScript)).ToString();
+        std::string strAddr = EncodeDestination(CScriptID(redeemScript));
         LogPrintf("%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;
@@ -3072,9 +3072,9 @@ bool CWallet::SetAddressBook(const CTxDestination& address, const std::string& s
     }
     NotifyAddressBookChanged(this, address, strName, ::IsMine(*this, address) != ISMINE_NO,
                              strPurpose, (fUpdated ? CT_UPDATED : CT_NEW) );
-    if (!strPurpose.empty() && !CWalletDB(*dbw).WritePurpose(CBitcoinAddress(address).ToString(), strPurpose))
+    if (!strPurpose.empty() && !CWalletDB(*dbw).WritePurpose(EncodeDestination(address), strPurpose))
         return false;
-    return CWalletDB(*dbw).WriteName(CBitcoinAddress(address).ToString(), strName);
+    return CWalletDB(*dbw).WriteName(EncodeDestination(address), strName);
 }
 
 bool CWallet::DelAddressBook(const CTxDestination& address)
@@ -3083,7 +3083,7 @@ bool CWallet::DelAddressBook(const CTxDestination& address)
         LOCK(cs_wallet); // mapAddressBook
 
         // Delete destdata tuples associated with address
-        std::string strAddress = CBitcoinAddress(address).ToString();
+        std::string strAddress = EncodeDestination(address);
         for (const std::pair<std::string, std::string> &item : mapAddressBook[address].destdata)
         {
             CWalletDB(*dbw).EraseDestData(strAddress, item.first);
@@ -3093,8 +3093,8 @@ bool CWallet::DelAddressBook(const CTxDestination& address)
 
     NotifyAddressBookChanged(this, address, "", ::IsMine(*this, address) != ISMINE_NO, "", CT_DELETED);
 
-    CWalletDB(*dbw).ErasePurpose(CBitcoinAddress(address).ToString());
-    return CWalletDB(*dbw).EraseName(CBitcoinAddress(address).ToString());
+    CWalletDB(*dbw).ErasePurpose(EncodeDestination(address));
+    return CWalletDB(*dbw).EraseName(EncodeDestination(address));
 }
 
 const std::string& CWallet::GetAccountName(const CScript& scriptPubKey) const
@@ -3711,14 +3711,14 @@ bool CWallet::AddDestData(const CTxDestination &dest, const std::string &key, co
         return false;
 
     mapAddressBook[dest].destdata.insert(std::make_pair(key, value));
-    return CWalletDB(*dbw).WriteDestData(CBitcoinAddress(dest).ToString(), key, value);
+    return CWalletDB(*dbw).WriteDestData(EncodeDestination(dest), key, value);
 }
 
 bool CWallet::EraseDestData(const CTxDestination &dest, const std::string &key)
 {
     if (!mapAddressBook[dest].destdata.erase(key))
         return false;
-    return CWalletDB(*dbw).EraseDestData(CBitcoinAddress(dest).ToString(), key);
+    return CWalletDB(*dbw).EraseDestData(EncodeDestination(dest), key);
 }
 
 bool CWallet::LoadDestData(const CTxDestination &dest, const std::string &key, const std::string &value)

src/wallet/walletdb.cpp

@@ -253,13 +253,13 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
         {
             std::string strAddress;
             ssKey >> strAddress;
-            ssValue >> pwallet->mapAddressBook[CBitcoinAddress(strAddress).Get()].name;
+            ssValue >> pwallet->mapAddressBook[DecodeDestination(strAddress)].name;
         }
         else if (strType == "purpose")
         {
             std::string strAddress;
             ssKey >> strAddress;
-            ssValue >> pwallet->mapAddressBook[CBitcoinAddress(strAddress).Get()].purpose;
+            ssValue >> pwallet->mapAddressBook[DecodeDestination(strAddress)].purpose;
         }
         else if (strType == "tx")
         {
@@ -493,7 +493,7 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
             ssKey >> strAddress;
             ssKey >> strKey;
             ssValue >> strValue;
-            if (!pwallet->LoadDestData(CBitcoinAddress(strAddress).Get(), strKey, strValue))
+            if (!pwallet->LoadDestData(DecodeDestination(strAddress), strKey, strValue))
             {
                 strErr = "Error reading wallet database: LoadDestData failed";
                 return false;