diff --git a/src/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
index 6c64792173..88e3c4d322 100644
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -1,274 +1,289 @@
 // Copyright (c) 2018 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <interfaces/wallet.h>
 
 #include <amount.h>
 #include <chain.h>
 #include <consensus/validation.h>
 #include <interfaces/handler.h>
 #include <net.h>
 #include <policy/policy.h>
 #include <primitives/transaction.h>
 #include <script/ismine.h>
 #include <script/standard.h>
 #include <support/allocators/secure.h>
 #include <sync.h>
 #include <ui_interface.h>
 #include <validation.h>
 #include <wallet/wallet.h>
 
 #include <memory>
 
 namespace interfaces {
 namespace {
 
     class PendingWalletTxImpl : public PendingWalletTx {
     public:
         PendingWalletTxImpl(CWallet &wallet)
             : m_wallet(wallet), m_key(&wallet) {}
 
         const CTransaction &get() override { return *m_tx; }
 
         bool commit(WalletValueMap value_map, WalletOrderForm order_form,
                     std::string from_account,
                     std::string &reject_reason) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
             CValidationState state;
             if (!m_wallet.CommitTransaction(
                     m_tx, std::move(value_map), std::move(order_form),
                     std::move(from_account), m_key, g_connman.get(), state)) {
                 reject_reason = state.GetRejectReason();
                 return false;
             }
             return true;
         }
 
         CTransactionRef m_tx;
         CWallet &m_wallet;
         CReserveKey m_key;
     };
 
     //! Construct wallet TxOut struct.
     WalletTxOut MakeWalletTxOut(CWallet &wallet, const CWalletTx &wtx, int n,
                                 int depth) {
         WalletTxOut result;
         result.txout = wtx.tx->vout[n];
         result.time = wtx.GetTxTime();
         result.depth_in_main_chain = depth;
         result.is_spent = wallet.IsSpent(wtx.GetId(), n);
         return result;
     }
 
     class WalletImpl : public Wallet {
     public:
         WalletImpl(CWallet &wallet) : m_wallet(wallet) {}
 
         bool encryptWallet(const SecureString &wallet_passphrase) override {
             return m_wallet.EncryptWallet(wallet_passphrase);
         }
         bool isCrypted() override { return m_wallet.IsCrypted(); }
         bool lock() override { return m_wallet.Lock(); }
         bool unlock(const SecureString &wallet_passphrase) override {
             return m_wallet.Unlock(wallet_passphrase);
         }
         bool isLocked() override { return m_wallet.IsLocked(); }
         bool changeWalletPassphrase(
             const SecureString &old_wallet_passphrase,
             const SecureString &new_wallet_passphrase) override {
             return m_wallet.ChangeWalletPassphrase(old_wallet_passphrase,
                                                    new_wallet_passphrase);
         }
         bool backupWallet(const std::string &filename) override {
             return m_wallet.BackupWallet(filename);
         }
         std::string getWalletName() override { return m_wallet.GetName(); }
+        bool getKeyFromPool(bool internal, CPubKey &pub_key) override {
+            return m_wallet.GetKeyFromPool(pub_key, internal);
+        }
         const CChainParams &getChainParams() override {
             return m_wallet.chainParams;
         }
         bool getPubKey(const CKeyID &address, CPubKey &pub_key) override {
             return m_wallet.GetPubKey(address, pub_key);
         }
         bool getPrivKey(const CKeyID &address, CKey &key) override {
             return m_wallet.GetKey(address, key);
         }
         bool isSpendable(const CTxDestination &dest) override {
             return IsMine(m_wallet, dest) & ISMINE_SPENDABLE;
         }
         bool haveWatchOnly() override { return m_wallet.HaveWatchOnly(); };
         bool setAddressBook(const CTxDestination &dest, const std::string &name,
                             const std::string &purpose) override {
             return m_wallet.SetAddressBook(dest, name, purpose);
         }
+        bool delAddressBook(const CTxDestination &dest) override {
+            return m_wallet.DelAddressBook(dest);
+        }
         bool getAddress(const CTxDestination &dest, std::string *name,
                         isminetype *is_mine) override {
             LOCK(m_wallet.cs_wallet);
             auto it = m_wallet.mapAddressBook.find(dest);
             if (it == m_wallet.mapAddressBook.end()) {
                 return false;
             }
             if (name) {
                 *name = it->second.name;
             }
             if (is_mine) {
                 *is_mine = IsMine(m_wallet, dest);
             }
             return true;
         }
+        std::vector<WalletAddress> getAddresses() override {
+            LOCK(m_wallet.cs_wallet);
+            std::vector<WalletAddress> result;
+            for (const auto &item : m_wallet.mapAddressBook) {
+                result.emplace_back(item.first, IsMine(m_wallet, item.first),
+                                    item.second.name, item.second.purpose);
+            }
+            return result;
+        }
         bool addDestData(const CTxDestination &dest, const std::string &key,
                          const std::string &value) override {
             LOCK(m_wallet.cs_wallet);
             return m_wallet.AddDestData(dest, key, value);
         }
         bool eraseDestData(const CTxDestination &dest,
                            const std::string &key) override {
             LOCK(m_wallet.cs_wallet);
             return m_wallet.EraseDestData(dest, key);
         }
         std::vector<std::string>
         getDestValues(const std::string &prefix) override {
             return m_wallet.GetDestValues(prefix);
         }
         void lockCoin(const COutPoint &output) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
             return m_wallet.LockCoin(output);
         }
         void unlockCoin(const COutPoint &output) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
             return m_wallet.UnlockCoin(output);
         }
         bool isLockedCoin(const COutPoint &output) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
             return m_wallet.IsLockedCoin(output.GetTxId(), output.GetN());
         }
         void listLockedCoins(std::vector<COutPoint> &outputs) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
             return m_wallet.ListLockedCoins(outputs);
         }
         std::unique_ptr<PendingWalletTx>
         createTransaction(const std::vector<CRecipient> &recipients,
                           const CCoinControl &coin_control, bool sign,
                           int &change_pos, Amount &fee,
                           std::string &fail_reason) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
             auto pending = std::make_unique<PendingWalletTxImpl>(m_wallet);
             if (!m_wallet.CreateTransaction(recipients, pending->m_tx,
                                             pending->m_key, fee, change_pos,
                                             fail_reason, coin_control, sign)) {
                 return {};
             }
             return std::move(pending);
         }
         bool transactionCanBeAbandoned(const TxId &txid) override {
             return m_wallet.TransactionCanBeAbandoned(txid);
         }
         bool abandonTransaction(const TxId &txid) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
             return m_wallet.AbandonTransaction(txid);
         }
         WalletBalances getBalances() override {
             WalletBalances result;
             result.balance = m_wallet.GetBalance();
             result.unconfirmed_balance = m_wallet.GetUnconfirmedBalance();
             result.immature_balance = m_wallet.GetImmatureBalance();
             result.have_watch_only = m_wallet.HaveWatchOnly();
             if (result.have_watch_only) {
                 result.watch_only_balance = m_wallet.GetWatchOnlyBalance();
                 result.unconfirmed_watch_only_balance =
                     m_wallet.GetUnconfirmedWatchOnlyBalance();
                 result.immature_watch_only_balance =
                     m_wallet.GetImmatureWatchOnlyBalance();
             }
             return result;
         }
         bool tryGetBalances(WalletBalances &balances,
                             int &num_blocks) override {
             TRY_LOCK(cs_main, locked_chain);
             if (!locked_chain) {
                 return false;
             }
             TRY_LOCK(m_wallet.cs_wallet, locked_wallet);
             if (!locked_wallet) {
                 return false;
             }
             balances = getBalances();
             num_blocks = ::chainActive.Height();
             return true;
         }
         Amount getBalance() override { return m_wallet.GetBalance(); }
         Amount getAvailableBalance(const CCoinControl &coin_control) override {
             return m_wallet.GetAvailableBalance(&coin_control);
         }
         CoinsList listCoins() override {
             LOCK2(::cs_main, m_wallet.cs_wallet);
             CoinsList result;
             for (const auto &entry : m_wallet.ListCoins()) {
                 auto &group = result[entry.first];
                 for (const auto &coin : entry.second) {
                     group.emplace_back(COutPoint(coin.tx->GetId(), coin.i),
                                        MakeWalletTxOut(m_wallet, *coin.tx,
                                                        coin.i, coin.nDepth));
                 }
             }
             return result;
         }
         std::vector<WalletTxOut>
         getCoins(const std::vector<COutPoint> &outputs) override {
             LOCK2(::cs_main, m_wallet.cs_wallet);
             std::vector<WalletTxOut> result;
             result.reserve(outputs.size());
             for (const auto &output : outputs) {
                 result.emplace_back();
                 auto it = m_wallet.mapWallet.find(output.GetTxId());
                 if (it != m_wallet.mapWallet.end()) {
                     int depth = it->second.GetDepthInMainChain();
                     if (depth >= 0) {
                         result.back() = MakeWalletTxOut(m_wallet, it->second,
                                                         output.GetN(), depth);
                     }
                 }
             }
             return result;
         }
         bool hdEnabled() override { return m_wallet.IsHDEnabled(); }
         std::unique_ptr<Handler>
         handleShowProgress(ShowProgressFn fn) override {
             return MakeHandler(m_wallet.ShowProgress.connect(fn));
         }
         std::unique_ptr<Handler>
         handleStatusChanged(StatusChangedFn fn) override {
             return MakeHandler(m_wallet.NotifyStatusChanged.connect(
                 [fn](CCryptoKeyStore *) { fn(); }));
         }
         std::unique_ptr<Handler>
         handleAddressBookChanged(AddressBookChangedFn fn) override {
             return MakeHandler(m_wallet.NotifyAddressBookChanged.connect(
                 [fn](CWallet *, const CTxDestination &address,
                      const std::string &label, bool is_mine,
                      const std::string &purpose, ChangeType status) {
                     fn(address, label, is_mine, purpose, status);
                 }));
         }
         std::unique_ptr<Handler>
         handleTransactionChanged(TransactionChangedFn fn) override {
             return MakeHandler(m_wallet.NotifyTransactionChanged.connect(
                 [fn, this](CWallet *, const TxId &txid, ChangeType status) {
                     fn(txid, status);
                 }));
         }
         std::unique_ptr<Handler>
         handleWatchOnlyChanged(WatchOnlyChangedFn fn) override {
             return MakeHandler(m_wallet.NotifyWatchonlyChanged.connect(fn));
         }
 
         CWallet &m_wallet;
     };
 
 } // namespace
 
 std::unique_ptr<Wallet> MakeWallet(CWallet &wallet) {
     return std::make_unique<WalletImpl>(wallet);
 }
 
 } // namespace interfaces
diff --git a/src/interfaces/wallet.h b/src/interfaces/wallet.h
index 2d3660fedd..b14d491322 100644
--- a/src/interfaces/wallet.h
+++ b/src/interfaces/wallet.h
@@ -1,242 +1,266 @@
 // Copyright (c) 2018 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_INTERFACES_WALLET_H
 #define BITCOIN_INTERFACES_WALLET_H
 
 #include <amount.h>                    // For Amount
 #include <primitives/transaction.h>    // For CTxOut
+#include <pubkey.h>                    // For CTxDestination (CKeyID and CScriptID)
 #include <script/ismine.h>             // For isminefilter, isminetype
 #include <script/standard.h>           // For CTxDestination
 #include <support/allocators/secure.h> // For SecureString
 #include <ui_interface.h>              // For ChangeType
 
 #include <cstdint>
 #include <functional>
 #include <map>
 #include <memory>
 #include <string>
 #include <tuple>
 #include <utility>
 #include <vector>
 
 class CChainParams;
 class CCoinControl;
 class CKey;
 class CMutableTransaction;
 class COutPoint;
 class CTransaction;
 class CWallet;
 enum class OutputType;
 struct CRecipient;
 struct TxId;
 
 namespace interfaces {
 
 class Handler;
 class PendingWalletTx;
+struct WalletAddress;
 struct WalletBalances;
 struct WalletTxOut;
 
 using WalletOrderForm = std::vector<std::pair<std::string, std::string>>;
 using WalletValueMap = std::map<std::string, std::string>;
 
 //! Interface for accessing a wallet.
 class Wallet {
 public:
     virtual ~Wallet() {}
 
     //! Encrypt wallet.
     virtual bool encryptWallet(const SecureString &wallet_passphrase) = 0;
 
     //! Return whether wallet is encrypted.
     virtual bool isCrypted() = 0;
 
     //! Lock wallet.
     virtual bool lock() = 0;
 
     //! Unlock wallet.
     virtual bool unlock(const SecureString &wallet_passphrase) = 0;
 
     //! Return whether wallet is locked.
     virtual bool isLocked() = 0;
 
     //! Change wallet passphrase.
     virtual bool
     changeWalletPassphrase(const SecureString &old_wallet_passphrase,
                            const SecureString &new_wallet_passphrase) = 0;
 
     //! Back up wallet.
     virtual bool backupWallet(const std::string &filename) = 0;
 
     //! Get wallet name.
     virtual std::string getWalletName() = 0;
 
     //! Get chainparams.
     virtual const CChainParams &getChainParams() = 0;
 
+    // Get key from pool.
+    virtual bool getKeyFromPool(bool internal, CPubKey &pub_key) = 0;
+
     //! Get public key.
     virtual bool getPubKey(const CKeyID &address, CPubKey &pub_key) = 0;
 
     //! Get private key.
     virtual bool getPrivKey(const CKeyID &address, CKey &key) = 0;
 
     //! Return whether wallet has private key.
     virtual bool isSpendable(const CTxDestination &dest) = 0;
 
     //! Return whether wallet has watch only keys.
     virtual bool haveWatchOnly() = 0;
 
     //! Add or update address.
     virtual bool setAddressBook(const CTxDestination &dest,
                                 const std::string &name,
                                 const std::string &purpose) = 0;
 
+    // Remove address.
+    virtual bool delAddressBook(const CTxDestination &dest) = 0;
+
     //! Look up address in wallet, return whether exists.
     virtual bool getAddress(const CTxDestination &dest,
                             std::string *name = nullptr,
                             isminetype *is_mine = nullptr) = 0;
 
+    //! Get wallet address list.
+    virtual std::vector<WalletAddress> getAddresses() = 0;
+
     //! Add dest data.
     virtual bool addDestData(const CTxDestination &dest, const std::string &key,
                              const std::string &value) = 0;
 
     //! Erase dest data.
     virtual bool eraseDestData(const CTxDestination &dest,
                                const std::string &key) = 0;
 
     //! Get dest values with prefix.
     virtual std::vector<std::string>
     getDestValues(const std::string &prefix) = 0;
 
     //! Lock coin.
     virtual void lockCoin(const COutPoint &output) = 0;
 
     //! Unlock coin.
     virtual void unlockCoin(const COutPoint &output) = 0;
 
     //! Return whether coin is locked.
     virtual bool isLockedCoin(const COutPoint &output) = 0;
 
     //! List locked coins.
     virtual void listLockedCoins(std::vector<COutPoint> &outputs) = 0;
 
     //! Create transaction.
     virtual std::unique_ptr<PendingWalletTx>
     createTransaction(const std::vector<CRecipient> &recipients,
                       const CCoinControl &coin_control, bool sign,
                       int &change_pos, Amount &fee,
                       std::string &fail_reason) = 0;
 
     //! Return whether transaction can be abandoned.
     virtual bool transactionCanBeAbandoned(const TxId &txid) = 0;
 
     //! Abandon transaction.
     virtual bool abandonTransaction(const TxId &txid) = 0;
 
     //! Get balances.
     virtual WalletBalances getBalances() = 0;
 
     //! Get balances if possible without blocking.
     virtual bool tryGetBalances(WalletBalances &balances, int &num_blocks) = 0;
 
     //! Get balance.
     virtual Amount getBalance() = 0;
 
     //! Get available balance.
     virtual Amount getAvailableBalance(const CCoinControl &coin_control) = 0;
 
     //! Return AvailableCoins + LockedCoins grouped by wallet address.
     //! (put change in one group with wallet address)
     using CoinsList = std::map<CTxDestination,
                                std::vector<std::tuple<COutPoint, WalletTxOut>>>;
     virtual CoinsList listCoins() = 0;
 
     //! Return wallet transaction output information.
     virtual std::vector<WalletTxOut>
     getCoins(const std::vector<COutPoint> &outputs) = 0;
 
     // Return whether HD enabled.
     virtual bool hdEnabled() = 0;
 
     //! Register handler for show progress messages.
     using ShowProgressFn =
         std::function<void(const std::string &title, int progress)>;
     virtual std::unique_ptr<Handler> handleShowProgress(ShowProgressFn fn) = 0;
 
     //! Register handler for status changed messages.
     using StatusChangedFn = std::function<void()>;
     virtual std::unique_ptr<Handler>
     handleStatusChanged(StatusChangedFn fn) = 0;
 
     //! Register handler for address book changed messages.
     using AddressBookChangedFn = std::function<void(
         const CTxDestination &address, const std::string &label, bool is_mine,
         const std::string &purpose, ChangeType status)>;
     virtual std::unique_ptr<Handler>
     handleAddressBookChanged(AddressBookChangedFn fn) = 0;
 
     //! Register handler for transaction changed messages.
     using TransactionChangedFn =
         std::function<void(const TxId &txid, ChangeType status)>;
     virtual std::unique_ptr<Handler>
     handleTransactionChanged(TransactionChangedFn fn) = 0;
 
     //! Register handler for watchonly changed messages.
     using WatchOnlyChangedFn = std::function<void(bool have_watch_only)>;
     virtual std::unique_ptr<Handler>
     handleWatchOnlyChanged(WatchOnlyChangedFn fn) = 0;
 };
 
 //! Tracking object returned by CreateTransaction and passed to
 //! CommitTransaction.
 class PendingWalletTx {
 public:
     virtual ~PendingWalletTx() {}
 
     //! Get transaction data.
     virtual const CTransaction &get() = 0;
 
     //! Send pending transaction and commit to wallet.
     virtual bool commit(WalletValueMap value_map, WalletOrderForm order_form,
                         std::string from_account,
                         std::string &reject_reason) = 0;
 };
 
+//! Information about one wallet address.
+struct WalletAddress {
+    CTxDestination dest;
+    isminetype is_mine;
+    std::string name;
+    std::string purpose;
+
+    WalletAddress(CTxDestination destIn, isminetype isMineIn,
+                  std::string nameIn, std::string purposeIn)
+        : dest(std::move(destIn)), is_mine(isMineIn), name(std::move(nameIn)),
+          purpose(std::move(purposeIn)) {}
+};
+
 //! Collection of wallet balances.
 struct WalletBalances {
     Amount balance = Amount::zero();
     Amount unconfirmed_balance = Amount::zero();
     Amount immature_balance = Amount::zero();
     bool have_watch_only = false;
     Amount watch_only_balance = Amount::zero();
     Amount unconfirmed_watch_only_balance = Amount::zero();
     Amount immature_watch_only_balance = Amount::zero();
 
     bool balanceChanged(const WalletBalances &prev) const {
         return balance != prev.balance ||
                unconfirmed_balance != prev.unconfirmed_balance ||
                immature_balance != prev.immature_balance ||
                watch_only_balance != prev.watch_only_balance ||
                unconfirmed_watch_only_balance !=
                    prev.unconfirmed_watch_only_balance ||
                immature_watch_only_balance != prev.immature_watch_only_balance;
     }
 };
 
 //! Wallet transaction output.
 struct WalletTxOut {
     CTxOut txout;
     int64_t time;
     int depth_in_main_chain = -1;
     bool is_spent = false;
 };
 
 //! Return implementation of Wallet interface. This function will be undefined
 //! in builds where ENABLE_WALLET is false.
 std::unique_ptr<Wallet> MakeWallet(CWallet &wallet);
 
 } // namespace interfaces
 
 #endif // BITCOIN_INTERFACES_WALLET_H
diff --git a/src/qt/addresstablemodel.cpp b/src/qt/addresstablemodel.cpp
index 431f3c1118..5f61780376 100644
--- a/src/qt/addresstablemodel.cpp
+++ b/src/qt/addresstablemodel.cpp
@@ -1,413 +1,398 @@
 // Copyright (c) 2011-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include "addresstablemodel.h"
+#include <qt/addresstablemodel.h>
 
-#include "guiutil.h"
-#include "walletmodel.h"
-
-#include "dstencode.h"
-#include "wallet/wallet.h"
+#include <dstencode.h>
+#include <interfaces/node.h>
+#include <qt/guiutil.h>
+#include <qt/walletmodel.h>
+#include <wallet/wallet.h>
 
 #include <QDebug>
 #include <QFont>
 
 const QString AddressTableModel::Send = "S";
 const QString AddressTableModel::Receive = "R";
 
 struct AddressTableEntry {
     enum Type {
         Sending,
         Receiving,
         /* QSortFilterProxyModel will filter these out */
         Hidden
     };
 
     Type type;
     QString label;
     QString address;
 
     AddressTableEntry() {}
     AddressTableEntry(Type _type, const QString &_label,
                       const QString &_address)
         : type(_type), label(_label), address(_address) {}
 };
 
 struct AddressTableEntryLessThan {
     bool operator()(const AddressTableEntry &a,
                     const AddressTableEntry &b) const {
         return a.address < b.address;
     }
     bool operator()(const AddressTableEntry &a, const QString &b) const {
         return a.address < b;
     }
     bool operator()(const QString &a, const AddressTableEntry &b) const {
         return a < b.address;
     }
 };
 
 /* Determine address type from address purpose */
 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
     // mapAddressBook at all.
     if (strPurpose == "send")
         addressType = AddressTableEntry::Sending;
     else if (strPurpose == "receive")
         addressType = AddressTableEntry::Receiving;
     else if (strPurpose == "unknown" || strPurpose == "") {
         // if purpose not set, guess
         addressType = (isMine ? AddressTableEntry::Receiving
                               : AddressTableEntry::Sending);
     }
     return addressType;
 }
 
 // Private implementation
 class AddressTablePriv {
 public:
-    CWallet *wallet;
     QList<AddressTableEntry> cachedAddressTable;
     AddressTableModel *parent;
 
-    AddressTablePriv(CWallet *_wallet, AddressTableModel *_parent)
-        : wallet(_wallet), parent(_parent) {}
+    AddressTablePriv(AddressTableModel *_parent) : parent(_parent) {}
 
-    void refreshAddressTable() {
+    void refreshAddressTable(interfaces::Wallet &wallet) {
         cachedAddressTable.clear();
-        {
-            LOCK(wallet->cs_wallet);
-            for (const std::pair<CTxDestination, CAddressBookData> &item :
-                 wallet->mapAddressBook) {
-                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(EncodeDestination(address))));
-            }
+        for (const auto &address : wallet.getAddresses()) {
+            AddressTableEntry::Type addressType = translateTransactionType(
+                QString::fromStdString(address.purpose), address.is_mine);
+            cachedAddressTable.append(AddressTableEntry(
+                addressType, QString::fromStdString(address.name),
+                QString::fromStdString(EncodeDestination(address.dest))));
         }
         // qLowerBound() and qUpperBound() require our cachedAddressTable list
         // to be sorted in asc order. Even though the map is already sorted this
         // re-sorting step is needed because the originating map is sorted by
         // binary address, not by base58() address.
         qSort(cachedAddressTable.begin(), cachedAddressTable.end(),
               AddressTableEntryLessThan());
     }
 
     void updateEntry(const QString &address, const QString &label, bool isMine,
                      const QString &purpose, int status) {
         // Find address / label in model
         QList<AddressTableEntry>::iterator lower =
             qLowerBound(cachedAddressTable.begin(), cachedAddressTable.end(),
                         address, AddressTableEntryLessThan());
         QList<AddressTableEntry>::iterator upper =
             qUpperBound(cachedAddressTable.begin(), cachedAddressTable.end(),
                         address, AddressTableEntryLessThan());
         int lowerIndex = (lower - cachedAddressTable.begin());
         int upperIndex = (upper - cachedAddressTable.begin());
         bool inModel = (lower != upper);
         AddressTableEntry::Type newEntryType =
             translateTransactionType(purpose, isMine);
 
         switch (status) {
             case CT_NEW:
                 if (inModel) {
                     qWarning() << "AddressTablePriv::updateEntry: Warning: Got "
                                   "CT_NEW, but entry is already in model";
                     break;
                 }
                 parent->beginInsertRows(QModelIndex(), lowerIndex, lowerIndex);
                 cachedAddressTable.insert(
                     lowerIndex,
                     AddressTableEntry(newEntryType, label, address));
                 parent->endInsertRows();
                 break;
             case CT_UPDATED:
                 if (!inModel) {
                     qWarning() << "AddressTablePriv::updateEntry: Warning: Got "
                                   "CT_UPDATED, but entry is not in model";
                     break;
                 }
                 lower->type = newEntryType;
                 lower->label = label;
                 parent->emitDataChanged(lowerIndex);
                 break;
             case CT_DELETED:
                 if (!inModel) {
                     qWarning() << "AddressTablePriv::updateEntry: Warning: Got "
                                   "CT_DELETED, but entry is not in model";
                     break;
                 }
                 parent->beginRemoveRows(QModelIndex(), lowerIndex,
                                         upperIndex - 1);
                 cachedAddressTable.erase(lower, upper);
                 parent->endRemoveRows();
                 break;
         }
     }
 
     int size() { return cachedAddressTable.size(); }
 
     AddressTableEntry *index(int idx) {
         if (idx >= 0 && idx < cachedAddressTable.size()) {
             return &cachedAddressTable[idx];
         } else {
             return 0;
         }
     }
 };
 
-AddressTableModel::AddressTableModel(CWallet *_wallet, WalletModel *parent)
-    : QAbstractTableModel(parent), walletModel(parent), wallet(_wallet),
-      priv(0) {
+AddressTableModel::AddressTableModel(WalletModel *parent)
+    : QAbstractTableModel(parent), walletModel(parent), priv(0) {
     columns << tr("Label") << tr("Address");
-    priv = new AddressTablePriv(wallet, this);
-    priv->refreshAddressTable();
+    priv = new AddressTablePriv(this);
+    priv->refreshAddressTable(parent->wallet());
 }
 
 AddressTableModel::~AddressTableModel() {
     delete priv;
 }
 
 int AddressTableModel::rowCount(const QModelIndex &parent) const {
     Q_UNUSED(parent);
     return priv->size();
 }
 
 int AddressTableModel::columnCount(const QModelIndex &parent) const {
     Q_UNUSED(parent);
     return columns.length();
 }
 
 QVariant AddressTableModel::data(const QModelIndex &index, int role) const {
     if (!index.isValid()) return QVariant();
 
     AddressTableEntry *rec =
         static_cast<AddressTableEntry *>(index.internalPointer());
 
     if (role == Qt::DisplayRole || role == Qt::EditRole) {
         switch (index.column()) {
             case Label:
                 if (rec->label.isEmpty() && role == Qt::DisplayRole) {
                     return tr("(no label)");
                 } else {
                     return rec->label;
                 }
             case Address:
                 return rec->address;
         }
     } else if (role == Qt::FontRole) {
         QFont font;
         if (index.column() == Address) {
             font = GUIUtil::fixedPitchFont();
         }
         return font;
     } else if (role == TypeRole) {
         switch (rec->type) {
             case AddressTableEntry::Sending:
                 return Send;
             case AddressTableEntry::Receiving:
                 return Receive;
             default:
                 break;
         }
     }
     return QVariant();
 }
 
 bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
                                 int role) {
     if (!index.isValid()) return false;
     AddressTableEntry *rec =
         static_cast<AddressTableEntry *>(index.internalPointer());
     std::string strPurpose =
         (rec->type == AddressTableEntry::Sending ? "send" : "receive");
     editStatus = OK;
 
     if (role == Qt::EditRole) {
-        LOCK(wallet->cs_wallet); /* For SetAddressBook / DelAddressBook */
-        CTxDestination curAddress =
-            DecodeDestination(rec->address.toStdString(), wallet->chainParams);
+        CTxDestination curAddress = DecodeDestination(
+            rec->address.toStdString(), walletModel->getChainParams());
         if (index.column() == Label) {
             // Do nothing, if old label == new label
             if (rec->label == value.toString()) {
                 editStatus = NO_CHANGES;
                 return false;
             }
-            wallet->SetAddressBook(curAddress, value.toString().toStdString(),
-                                   strPurpose);
+            walletModel->wallet().setAddressBook(
+                curAddress, value.toString().toStdString(), strPurpose);
         } else if (index.column() == Address) {
             CTxDestination newAddress = DecodeDestination(
-                value.toString().toStdString(), wallet->chainParams);
+                value.toString().toStdString(), walletModel->getChainParams());
             // Refuse to set invalid address, set error status and return false
             if (boost::get<CNoDestination>(&newAddress)) {
                 editStatus = INVALID_ADDRESS;
                 return false;
             }
             // Do nothing, if old address == new address
             else if (newAddress == curAddress) {
                 editStatus = NO_CHANGES;
                 return false;
             }
             // Check for duplicate addresses to prevent accidental deletion of
             // addresses, if you try to paste an existing address over another
             // address (with a different label)
-            else if (wallet->mapAddressBook.count(newAddress)) {
+            if (walletModel->wallet().getAddress(newAddress)) {
                 editStatus = DUPLICATE_ADDRESS;
                 return false;
             }
             // Double-check that we're not overwriting a receiving address
             else if (rec->type == AddressTableEntry::Sending) {
                 // Remove old entry
-                wallet->DelAddressBook(curAddress);
+                walletModel->wallet().delAddressBook(curAddress);
                 // Add new entry with new address
-                wallet->SetAddressBook(newAddress, rec->label.toStdString(),
-                                       strPurpose);
+                walletModel->wallet().setAddressBook(
+                    newAddress, value.toString().toStdString(), strPurpose);
             }
         }
         return true;
     }
     return false;
 }
 
 QVariant AddressTableModel::headerData(int section, Qt::Orientation orientation,
                                        int role) const {
     if (orientation == Qt::Horizontal) {
         if (role == Qt::DisplayRole && section < columns.size()) {
             return columns[section];
         }
     }
     return QVariant();
 }
 
 Qt::ItemFlags AddressTableModel::flags(const QModelIndex &index) const {
     if (!index.isValid()) return 0;
     AddressTableEntry *rec =
         static_cast<AddressTableEntry *>(index.internalPointer());
 
     Qt::ItemFlags retval = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
     // Can edit address and label for sending addresses, and only label for
     // receiving addresses.
     if (rec->type == AddressTableEntry::Sending ||
         (rec->type == AddressTableEntry::Receiving &&
          index.column() == Label)) {
         retval |= Qt::ItemIsEditable;
     }
     return retval;
 }
 
 QModelIndex AddressTableModel::index(int row, int column,
                                      const QModelIndex &parent) const {
     Q_UNUSED(parent);
     AddressTableEntry *data = priv->index(row);
     if (data) {
         return createIndex(row, column, priv->index(row));
     } else {
         return QModelIndex();
     }
 }
 
 void AddressTableModel::updateEntry(const QString &address,
                                     const QString &label, bool isMine,
                                     const QString &purpose, int status) {
     // Update address book model from Bitcoin core
     priv->updateEntry(address, label, isMine, purpose, status);
 }
 
 QString AddressTableModel::addRow(const QString &type, const QString &label,
                                   const QString &address) {
     std::string strLabel = label.toStdString();
     std::string strAddress = address.toStdString();
 
     editStatus = OK;
 
     if (type == Send) {
         if (!walletModel->validateAddress(address)) {
             editStatus = INVALID_ADDRESS;
             return QString();
         }
         // Check for duplicate addresses
-        {
-            LOCK(wallet->cs_wallet);
-            if (wallet->mapAddressBook.count(
-                    DecodeDestination(strAddress, wallet->chainParams))) {
-                editStatus = DUPLICATE_ADDRESS;
-                return QString();
-            }
+        if (walletModel->wallet().getAddress(
+                DecodeDestination(strAddress, walletModel->getChainParams()))) {
+            editStatus = DUPLICATE_ADDRESS;
+            return QString();
         }
     } else if (type == Receive) {
         // Generate a new address to associate with given label
         CPubKey newKey;
-        if (!wallet->GetKeyFromPool(newKey)) {
+        if (!walletModel->wallet().getKeyFromPool(false /* internal */,
+                                                  newKey)) {
             WalletModel::UnlockContext ctx(walletModel->requestUnlock());
             if (!ctx.isValid()) {
                 // Unlock wallet failed or was cancelled
                 editStatus = WALLET_UNLOCK_FAILURE;
                 return QString();
             }
-            if (!wallet->GetKeyFromPool(newKey)) {
+            if (!walletModel->wallet().getKeyFromPool(false /* internal */,
+                                                      newKey)) {
                 editStatus = KEY_GENERATION_FAILURE;
                 return QString();
             }
         }
         strAddress = EncodeDestination(newKey.GetID());
     } else {
         return QString();
     }
 
     // Add entry
-    wallet->SetAddressBook(DecodeDestination(strAddress, wallet->chainParams),
-                           strLabel, (type == Send ? "send" : "receive"));
+    walletModel->wallet().setAddressBook(
+        DecodeDestination(strAddress, walletModel->getChainParams()), strLabel,
+        (type == Send ? "send" : "receive"));
     return QString::fromStdString(strAddress);
 }
 
 bool AddressTableModel::removeRows(int row, int count,
                                    const QModelIndex &parent) {
     Q_UNUSED(parent);
     AddressTableEntry *rec = priv->index(row);
     if (count != 1 || !rec || rec->type == AddressTableEntry::Receiving) {
         // Can only remove one row at a time, and cannot remove rows not in
         // model.
         // Also refuse to remove receiving addresses.
         return false;
     }
-    wallet->DelAddressBook(
-        DecodeDestination(rec->address.toStdString(), wallet->chainParams));
+    walletModel->wallet().delAddressBook(DecodeDestination(
+        rec->address.toStdString(), walletModel->getChainParams()));
     return true;
 }
 
 /* Look up label for address in address book, if not found return empty string.
  */
 QString AddressTableModel::labelForAddress(const QString &address) const {
-    {
-        LOCK(wallet->cs_wallet);
-        CTxDestination destination =
-            DecodeDestination(address.toStdString(), wallet->chainParams);
-        std::map<CTxDestination, CAddressBookData>::iterator mi =
-            wallet->mapAddressBook.find(destination);
-        if (mi != wallet->mapAddressBook.end()) {
-            return QString::fromStdString(mi->second.name);
-        }
+    CTxDestination destination =
+        DecodeDestination(address.toStdString(), walletModel->getChainParams());
+    std::string name;
+    if (walletModel->wallet().getAddress(destination, &name)) {
+        return QString::fromStdString(name);
     }
     return QString();
 }
 
 int AddressTableModel::lookupAddress(const QString &address) const {
     QModelIndexList lst = match(index(0, Address, QModelIndex()), Qt::EditRole,
                                 address, 1, Qt::MatchExactly);
     if (lst.isEmpty()) {
         return -1;
     } else {
         return lst.at(0).row();
     }
 }
 
 void AddressTableModel::emitDataChanged(int idx) {
     Q_EMIT dataChanged(index(idx, 0, QModelIndex()),
                        index(idx, columns.length() - 1, QModelIndex()));
 }
diff --git a/src/qt/addresstablemodel.h b/src/qt/addresstablemodel.h
index 5ef72bdb24..ab477c8dd7 100644
--- a/src/qt/addresstablemodel.h
+++ b/src/qt/addresstablemodel.h
@@ -1,113 +1,114 @@
 // Copyright (c) 2011-2015 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_QT_ADDRESSTABLEMODEL_H
 #define BITCOIN_QT_ADDRESSTABLEMODEL_H
 
 #include <QAbstractTableModel>
 #include <QStringList>
 
 class AddressTablePriv;
 class WalletModel;
 
-class CWallet;
+namespace interfaces {
+class Wallet;
+}
 
 /**
  * Qt model of the address book in the core. This allows views to access and
  * modify the address book.
  */
 class AddressTableModel : public QAbstractTableModel {
     Q_OBJECT
 
 public:
-    explicit AddressTableModel(CWallet *wallet, WalletModel *parent = 0);
+    explicit AddressTableModel(WalletModel *parent = 0);
     ~AddressTableModel();
 
     enum ColumnIndex {
         /**< User specified label */
         Label = 0,
         /**< Bitcoin address */
         Address = 1
     };
 
     enum RoleIndex {
         /**< Type of address (#Send or #Receive) */
         TypeRole = Qt::UserRole
     };
 
     /** Return status of edit/insert operation */
     enum EditStatus {
         /**< Everything ok */
         OK,
         /**< No changes were made during edit operation */
         NO_CHANGES,
         /**< Unparseable address */
         INVALID_ADDRESS,
         /**< Address already in address book */
         DUPLICATE_ADDRESS,
         /**< Wallet could not be unlocked to create new receiving address */
         WALLET_UNLOCK_FAILURE,
         /**< Generating a new public key for a receiving address failed */
         KEY_GENERATION_FAILURE
     };
 
     /**< Specifies send address */
     static const QString Send;
     /**< Specifies receive address */
     static const QString Receive;
 
     /** @name Methods overridden from QAbstractTableModel
         @{*/
     int rowCount(const QModelIndex &parent) const override;
     int columnCount(const QModelIndex &parent) const override;
     QVariant data(const QModelIndex &index, int role) const override;
     bool setData(const QModelIndex &index, const QVariant &value,
                  int role) override;
     QVariant headerData(int section, Qt::Orientation orientation,
                         int role) const override;
     QModelIndex index(int row, int column,
                       const QModelIndex &parent) const override;
     bool removeRows(int row, int count,
                     const QModelIndex &parent = QModelIndex()) override;
     Qt::ItemFlags flags(const QModelIndex &index) const override;
     /*@}*/
 
     /* Add an address to the model.
        Returns the added address on success, and an empty string otherwise.
      */
     QString addRow(const QString &type, const QString &label,
                    const QString &address);
 
     /* Look up label for address in address book, if not found return empty
      * string.
      */
     QString labelForAddress(const QString &address) const;
 
     /* Look up row index of an address in the model.
        Return -1 if not found.
      */
     int lookupAddress(const QString &address) const;
 
     EditStatus getEditStatus() const { return editStatus; }
 
 private:
     WalletModel *walletModel;
-    CWallet *wallet;
     AddressTablePriv *priv;
     QStringList columns;
     EditStatus editStatus;
 
     /** Notify listeners that data changed. */
     void emitDataChanged(int index);
 
 public Q_SLOTS:
     /* Update address list from core.
      */
     void updateEntry(const QString &address, const QString &label, bool isMine,
                      const QString &purpose, int status);
 
     friend class AddressTablePriv;
 };
 
 #endif // BITCOIN_QT_ADDRESSTABLEMODEL_H
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index 147c1c0ed2..b5e3ddf5c3 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -1,490 +1,490 @@
 // Copyright (c) 2011-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <qt/walletmodel.h>
 
 #include <chain.h>
 #include <config.h>
 #include <consensus/validation.h>
 #include <dstencode.h>
 #include <interfaces/handler.h>
 #include <interfaces/node.h>
 #include <keystore.h>
 #include <net.h> // for g_connman
 #include <qt/addresstablemodel.h>
 #include <qt/guiconstants.h>
 #include <qt/guiutil.h>
 #include <qt/paymentserver.h>
 #include <qt/recentrequeststablemodel.h>
 #include <qt/transactiontablemodel.h>
 #include <sync.h>
 #include <ui_interface.h>
 #include <util.h> // for GetBoolArg
 #include <validation.h>
 #include <wallet/coincontrol.h>
 #include <wallet/wallet.h>
 #include <wallet/walletdb.h> // for BackupWallet
 
 #include <QDebug>
 #include <QSet>
 #include <QTimer>
 
 #include <cstdint>
 
 WalletModel::WalletModel(std::unique_ptr<interfaces::Wallet> wallet,
                          interfaces::Node &node,
                          const PlatformStyle *platformStyle, CWallet *_wallet,
                          OptionsModel *_optionsModel, QObject *parent)
     : QObject(parent), m_wallet(std::move(wallet)), m_node(node),
       cwallet(_wallet), optionsModel(_optionsModel), addressTableModel(0),
       transactionTableModel(0), recentRequestsTableModel(0),
       cachedEncryptionStatus(Unencrypted), cachedNumBlocks(0) {
     fHaveWatchOnly = m_wallet->haveWatchOnly();
     fForceCheckBalanceChanged = false;
 
-    addressTableModel = new AddressTableModel(cwallet, this);
+    addressTableModel = new AddressTableModel(this);
     transactionTableModel =
         new TransactionTableModel(platformStyle, cwallet, this);
     recentRequestsTableModel = new RecentRequestsTableModel(cwallet, this);
 
     // This timer will be fired repeatedly to update the balance
     pollTimer = new QTimer(this);
     connect(pollTimer, SIGNAL(timeout()), this, SLOT(pollBalanceChanged()));
     pollTimer->start(MODEL_UPDATE_DELAY);
 
     subscribeToCoreSignals();
 }
 
 WalletModel::~WalletModel() {
     unsubscribeFromCoreSignals();
 }
 
 void WalletModel::updateStatus() {
     EncryptionStatus newEncryptionStatus = getEncryptionStatus();
 
     if (cachedEncryptionStatus != newEncryptionStatus) {
         Q_EMIT encryptionStatusChanged();
     }
 }
 
 void WalletModel::pollBalanceChanged() {
     // Try to get balances and return early if locks can't be acquired. This
     // avoids the GUI from getting stuck on periodical polls if the core is
     // holding the locks for a longer time - for example, during a wallet
     // rescan.
     interfaces::WalletBalances new_balances;
     int numBlocks = -1;
     if (!m_wallet->tryGetBalances(new_balances, numBlocks)) {
         return;
     }
 
     if (fForceCheckBalanceChanged || m_node.getNumBlocks() != cachedNumBlocks) {
         fForceCheckBalanceChanged = false;
 
         // Balance and number of transactions might have changed
         cachedNumBlocks = m_node.getNumBlocks();
 
         checkBalanceChanged(new_balances);
         if (transactionTableModel) {
             transactionTableModel->updateConfirmations();
         }
     }
 }
 
 void WalletModel::checkBalanceChanged(
     const interfaces::WalletBalances &new_balances) {
     if (new_balances.balanceChanged(m_cached_balances)) {
         m_cached_balances = new_balances;
         Q_EMIT balanceChanged(
             new_balances.balance, new_balances.unconfirmed_balance,
             new_balances.immature_balance, new_balances.watch_only_balance,
             new_balances.unconfirmed_watch_only_balance,
             new_balances.immature_watch_only_balance);
     }
 }
 
 void WalletModel::updateTransaction() {
     // Balance and number of transactions might have changed
     fForceCheckBalanceChanged = true;
 }
 
 void WalletModel::updateAddressBook(const QString &address,
                                     const QString &label, bool isMine,
                                     const QString &purpose, int status) {
     if (addressTableModel) {
         addressTableModel->updateEntry(address, label, isMine, purpose, status);
     }
 }
 
 void WalletModel::updateWatchOnlyFlag(bool fHaveWatchonly) {
     fHaveWatchOnly = fHaveWatchonly;
     Q_EMIT notifyWatchonlyChanged(fHaveWatchonly);
 }
 
 bool WalletModel::validateAddress(const QString &address) {
     return IsValidDestinationString(address.toStdString(), getChainParams());
 }
 
 WalletModel::SendCoinsReturn
 WalletModel::prepareTransaction(WalletModelTransaction &transaction,
                                 const CCoinControl &coinControl) {
     Amount total = Amount::zero();
     bool fSubtractFeeFromAmount = false;
     QList<SendCoinsRecipient> recipients = transaction.getRecipients();
     std::vector<CRecipient> vecSend;
 
     if (recipients.empty()) {
         return OK;
     }
 
     // Used to detect duplicates
     QSet<QString> setAddress;
     int nAddresses = 0;
 
     // Pre-check input data for validity
     for (const SendCoinsRecipient &rcp : recipients) {
         if (rcp.fSubtractFeeFromAmount) fSubtractFeeFromAmount = true;
 
         // PaymentRequest...
         if (rcp.paymentRequest.IsInitialized()) {
             Amount subtotal = Amount::zero();
             const payments::PaymentDetails &details =
                 rcp.paymentRequest.getDetails();
             for (int i = 0; i < details.outputs_size(); i++) {
                 const payments::Output &out = details.outputs(i);
                 if (out.amount() <= 0) {
                     continue;
                 }
 
                 subtotal += int64_t(out.amount()) * SATOSHI;
                 const uint8_t *scriptStr = (const uint8_t *)out.script().data();
                 CScript scriptPubKey(scriptStr,
                                      scriptStr + out.script().size());
                 Amount nAmount = int64_t(out.amount()) * SATOSHI;
                 CRecipient recipient = {scriptPubKey, nAmount,
                                         rcp.fSubtractFeeFromAmount};
                 vecSend.push_back(recipient);
             }
 
             if (subtotal <= Amount::zero()) {
                 return InvalidAmount;
             }
             total += subtotal;
         } else {
             // User-entered bitcoin address / amount:
             if (!validateAddress(rcp.address)) {
                 return InvalidAddress;
             }
             if (rcp.amount <= Amount::zero()) {
                 return InvalidAmount;
             }
             setAddress.insert(rcp.address);
             ++nAddresses;
 
             CScript scriptPubKey = GetScriptForDestination(
                 DecodeDestination(rcp.address.toStdString(), getChainParams()));
             CRecipient recipient = {scriptPubKey, Amount(rcp.amount),
                                     rcp.fSubtractFeeFromAmount};
             vecSend.push_back(recipient);
 
             total += rcp.amount;
         }
     }
     if (setAddress.size() != nAddresses) {
         return DuplicateAddress;
     }
 
     Amount nBalance = m_wallet->getAvailableBalance(coinControl);
 
     if (total > nBalance) {
         return AmountExceedsBalance;
     }
 
     Amount nFeeRequired = Amount::zero();
     int nChangePosRet = -1;
     std::string strFailReason;
 
     auto &newTx = transaction.getWtx();
     newTx =
         m_wallet->createTransaction(vecSend, coinControl, true /* sign */,
                                     nChangePosRet, nFeeRequired, strFailReason);
     transaction.setTransactionFee(nFeeRequired);
     if (fSubtractFeeFromAmount && newTx) {
         transaction.reassignAmounts(nChangePosRet);
     }
 
     if (!newTx) {
         if (!fSubtractFeeFromAmount && (total + nFeeRequired) > nBalance) {
             return SendCoinsReturn(AmountWithFeeExceedsBalance);
         }
         Q_EMIT message(tr("Send Coins"), QString::fromStdString(strFailReason),
                        CClientUIInterface::MSG_ERROR);
         return TransactionCreationFailed;
     }
 
     // reject absurdly high fee. (This can never happen because the
     // wallet caps the fee at maxTxFee. This merely serves as a
     // belt-and-suspenders check)
     if (nFeeRequired > m_node.getMaxTxFee()) {
         return AbsurdFee;
     }
 
     return SendCoinsReturn(OK);
 }
 
 WalletModel::SendCoinsReturn
 WalletModel::sendCoins(WalletModelTransaction &transaction) {
     /* store serialized transaction */
     QByteArray transaction_array;
 
     std::vector<std::pair<std::string, std::string>> vOrderForm;
     for (const SendCoinsRecipient &rcp : transaction.getRecipients()) {
         if (rcp.paymentRequest.IsInitialized()) {
             // Make sure any payment requests involved are still valid.
             if (PaymentServer::verifyExpired(rcp.paymentRequest.getDetails())) {
                 return PaymentRequestExpired;
             }
 
             // Store PaymentRequests in wtx.vOrderForm in wallet.
             std::string value;
             rcp.paymentRequest.SerializeToString(&value);
             vOrderForm.emplace_back("PaymentRequest", std::move(value));
         } else if (!rcp.message.isEmpty()) {
             // Message from normal bitcoincash:URI
             // (bitcoincash:123...?message=example)
             vOrderForm.emplace_back("Message", rcp.message.toStdString());
         }
     }
 
     auto &newTx = transaction.getWtx();
     std::string rejectReason;
     if (!newTx->commit({} /* mapValue */, std::move(vOrderForm),
                        {} /* fromAccount */, rejectReason)) {
         return SendCoinsReturn(TransactionCommitFailed,
                                QString::fromStdString(rejectReason));
     }
 
     CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
     ssTx << newTx->get();
     transaction_array.append(&(ssTx[0]), ssTx.size());
 
     // Add addresses / update labels that we've sent to to the address book, and
     // emit coinsSent signal for each recipient
     for (const SendCoinsRecipient &rcp : transaction.getRecipients()) {
         // Don't touch the address book when we have a payment request
         if (!rcp.paymentRequest.IsInitialized()) {
             std::string strAddress = rcp.address.toStdString();
             CTxDestination dest =
                 DecodeDestination(strAddress, getChainParams());
             std::string strLabel = rcp.label.toStdString();
             // Check if we have a new address or an updated label
             std::string name;
             if (!m_wallet->getAddress(dest, &name)) {
                 m_wallet->setAddressBook(dest, strLabel, "send");
             } else if (name != strLabel) {
                 // "" means don't change purpose
                 m_wallet->setAddressBook(dest, strLabel, "");
             }
         }
         Q_EMIT coinsSent(cwallet, rcp, transaction_array);
     }
 
     // update balance immediately, otherwise there could be a short noticeable
     // delay until pollBalanceChanged hits
     checkBalanceChanged(m_wallet->getBalances());
 
     return SendCoinsReturn(OK);
 }
 
 OptionsModel *WalletModel::getOptionsModel() {
     return optionsModel;
 }
 
 AddressTableModel *WalletModel::getAddressTableModel() {
     return addressTableModel;
 }
 
 TransactionTableModel *WalletModel::getTransactionTableModel() {
     return transactionTableModel;
 }
 
 RecentRequestsTableModel *WalletModel::getRecentRequestsTableModel() {
     return recentRequestsTableModel;
 }
 
 WalletModel::EncryptionStatus WalletModel::getEncryptionStatus() const {
     if (!m_wallet->isCrypted()) {
         return Unencrypted;
     } else if (m_wallet->isLocked()) {
         return Locked;
     } else {
         return Unlocked;
     }
 }
 
 bool WalletModel::setWalletEncrypted(bool encrypted,
                                      const SecureString &passphrase) {
     if (encrypted) {
         // Encrypt
         return m_wallet->encryptWallet(passphrase);
     } else {
         // Decrypt -- TODO; not supported yet
         return false;
     }
 }
 
 bool WalletModel::setWalletLocked(bool locked, const SecureString &passPhrase) {
     if (locked) {
         // Lock
         return m_wallet->lock();
     } else {
         // Unlock
         return m_wallet->unlock(passPhrase);
     }
 }
 
 bool WalletModel::changePassphrase(const SecureString &oldPass,
                                    const SecureString &newPass) {
     // Make sure wallet is locked before attempting pass change
     m_wallet->lock();
     return m_wallet->changeWalletPassphrase(oldPass, newPass);
 }
 
 // Handlers for core signals
 static void NotifyKeyStoreStatusChanged(WalletModel *walletmodel) {
     qDebug() << "NotifyKeyStoreStatusChanged";
     QMetaObject::invokeMethod(walletmodel, "updateStatus",
                               Qt::QueuedConnection);
 }
 
 static void NotifyAddressBookChanged(WalletModel *walletmodel,
                                      const CTxDestination &address,
                                      const std::string &label, bool isMine,
                                      const std::string &purpose,
                                      ChangeType status) {
     QString strAddress = QString::fromStdString(EncodeDestination(address));
     QString strLabel = QString::fromStdString(label);
     QString strPurpose = QString::fromStdString(purpose);
 
     qDebug() << "NotifyAddressBookChanged: " + strAddress + " " + strLabel +
                     " isMine=" + QString::number(isMine) +
                     " purpose=" + strPurpose +
                     " status=" + QString::number(status);
     QMetaObject::invokeMethod(walletmodel, "updateAddressBook",
                               Qt::QueuedConnection, Q_ARG(QString, strAddress),
                               Q_ARG(QString, strLabel), Q_ARG(bool, isMine),
                               Q_ARG(QString, strPurpose), Q_ARG(int, status));
 }
 
 static void NotifyTransactionChanged(WalletModel *walletmodel, const TxId &hash,
                                      ChangeType status) {
     Q_UNUSED(hash);
     Q_UNUSED(status);
     QMetaObject::invokeMethod(walletmodel, "updateTransaction",
                               Qt::QueuedConnection);
 }
 
 static void ShowProgress(WalletModel *walletmodel, const std::string &title,
                          int nProgress) {
     // emits signal "showProgress"
     QMetaObject::invokeMethod(walletmodel, "showProgress", Qt::QueuedConnection,
                               Q_ARG(QString, QString::fromStdString(title)),
                               Q_ARG(int, nProgress));
 }
 
 static void NotifyWatchonlyChanged(WalletModel *walletmodel,
                                    bool fHaveWatchonly) {
     QMetaObject::invokeMethod(walletmodel, "updateWatchOnlyFlag",
                               Qt::QueuedConnection,
                               Q_ARG(bool, fHaveWatchonly));
 }
 
 void WalletModel::subscribeToCoreSignals() {
     // Connect signals to wallet
     m_handler_status_changed = m_wallet->handleStatusChanged(
         boost::bind(&NotifyKeyStoreStatusChanged, this));
     m_handler_address_book_changed = m_wallet->handleAddressBookChanged(
         boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5));
     m_handler_transaction_changed = m_wallet->handleTransactionChanged(
         boost::bind(NotifyTransactionChanged, this, _1, _2));
     m_handler_show_progress =
         m_wallet->handleShowProgress(boost::bind(ShowProgress, this, _1, _2));
     m_handler_watch_only_changed = m_wallet->handleWatchOnlyChanged(
         boost::bind(NotifyWatchonlyChanged, this, _1));
 }
 
 void WalletModel::unsubscribeFromCoreSignals() {
     // Disconnect signals from wallet
     m_handler_status_changed->disconnect();
     m_handler_address_book_changed->disconnect();
     m_handler_transaction_changed->disconnect();
     m_handler_show_progress->disconnect();
     m_handler_watch_only_changed->disconnect();
 }
 
 // WalletModel::UnlockContext implementation
 WalletModel::UnlockContext WalletModel::requestUnlock() {
     bool was_locked = getEncryptionStatus() == Locked;
     if (was_locked) {
         // Request UI to unlock wallet
         Q_EMIT requireUnlock();
     }
     // If wallet is still locked, unlock was failed or cancelled, mark context
     // as invalid
     bool valid = getEncryptionStatus() != Locked;
 
     return UnlockContext(this, valid, was_locked);
 }
 
 WalletModel::UnlockContext::UnlockContext(WalletModel *_wallet, bool _valid,
                                           bool _relock)
     : wallet(_wallet), valid(_valid), relock(_relock) {}
 
 WalletModel::UnlockContext::~UnlockContext() {
     if (valid && relock) {
         wallet->setWalletLocked(true);
     }
 }
 
 void WalletModel::UnlockContext::CopyFrom(const UnlockContext &rhs) {
     // Transfer context; old object no longer relocks wallet
     *this = rhs;
     rhs.relock = false;
 }
 
 void WalletModel::loadReceiveRequests(
     std::vector<std::string> &vReceiveRequests) {
     // receive request
     vReceiveRequests = m_wallet->getDestValues("rr");
 }
 
 bool WalletModel::saveReceiveRequest(const std::string &sAddress,
                                      const int64_t nId,
                                      const std::string &sRequest) {
     CTxDestination dest = DecodeDestination(sAddress, getChainParams());
 
     std::stringstream ss;
     ss << nId;
     // "rr" prefix = "receive request" in destdata
     std::string key = "rr" + ss.str();
 
     return sRequest.empty() ? m_wallet->eraseDestData(dest, key)
                             : m_wallet->addDestData(dest, key, sRequest);
 }
 
 bool WalletModel::isWalletEnabled() {
     return !gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET);
 }
 
 QString WalletModel::getWalletName() const {
     return QString::fromStdString(m_wallet->getWalletName());
 }
 
 bool WalletModel::isMultiwallet() {
     return m_node.getWallets().size() > 1;
 }
 
 const CChainParams &WalletModel::getChainParams() const {
     return GetConfig().GetChainParams();
 }