gui: Avoid redundant tx status updates

In TransactionTablePriv::index, avoid calling
interfaces::Wallet::tryGetTxStatus if the status is up to date as of the most
recent NotifyBlockTip notification.  Store height from the most recent
notification in a new ClientModel::cachedNumBlocks variable in order to check
this.

This avoids floods of IPC traffic from tryGetTxStatus with #10102 when there
are a lot of transactions. It might also make the GUI a little more efficient
even when there is no IPC.

src/qt/bitcoin.cpp

@@ -336,7 +336,7 @@ void BitcoinApplication::initializeResult(bool success)
         window->setClientModel(clientModel);
 #ifdef ENABLE_WALLET
         if (WalletModel::isWalletEnabled()) {
-            m_wallet_controller = new WalletController(m_node, platformStyle, optionsModel, this);
+            m_wallet_controller = new WalletController(*clientModel, platformStyle, this);
             window->setWalletController(m_wallet_controller);
             if (paymentServer) {
                 paymentServer->setOptionsModel(optionsModel);

src/qt/clientmodel.cpp

@@ -105,6 +105,14 @@ int64_t ClientModel::getHeaderTipTime() const
     return cachedBestHeaderTime;
 }
 
+int ClientModel::getNumBlocks() const
+{
+    if (m_cached_num_blocks == -1) {
+        m_cached_num_blocks = m_node.getNumBlocks();
+    }
+    return m_cached_num_blocks;
+}
+
 void ClientModel::updateNumConnections(int numConnections)
 {
     Q_EMIT numConnectionsChanged(numConnections);
@@ -241,6 +249,8 @@ static void BlockTipChanged(ClientModel *clientmodel, bool initialSync, int heig
         // cache best headers time and height to reduce future cs_main locks
         clientmodel->cachedBestHeaderHeight = height;
         clientmodel->cachedBestHeaderTime = blockTime;
+    } else {
+        clientmodel->m_cached_num_blocks = height;
     }
     // if we are in-sync or if we notify a header update, update the UI regardless of last update time
     if (fHeader || !initialSync || now - nLastUpdateNotification > MODEL_UPDATE_DELAY) {

src/qt/clientmodel.h

@@ -56,6 +56,7 @@ public:
 
     //! Return number of connections, default is in- and outbound (total)
     int getNumConnections(unsigned int flags = CONNECTIONS_ALL) const;
+    int getNumBlocks() const;
     int getHeaderTipHeight() const;
     int64_t getHeaderTipTime() const;
 
@@ -73,9 +74,10 @@ public:
 
     bool getProxyInfo(std::string& ip_port) const;
 
-    // caches for the best header
+    // caches for the best header, number of blocks
     mutable std::atomic<int> cachedBestHeaderHeight;
     mutable std::atomic<int64_t> cachedBestHeaderTime;
+    mutable std::atomic<int> m_cached_num_blocks{-1};
 
 private:
     interfaces::Node& m_node;

src/qt/test/addressbooktests.cpp

@@ -4,6 +4,7 @@
 
 #include <interfaces/chain.h>
 #include <interfaces/node.h>
+#include <qt/clientmodel.h>
 #include <qt/editaddressdialog.h>
 #include <qt/optionsmodel.h>
 #include <qt/platformstyle.h>
@@ -101,8 +102,9 @@ void TestAddAddressesToSendBook(interfaces::Node& node)
     // Initialize relevant QT models.
     std::unique_ptr<const PlatformStyle> platformStyle(PlatformStyle::instantiate("other"));
     OptionsModel optionsModel(node);
+    ClientModel clientModel(node, &optionsModel);
     AddWallet(wallet);
-    WalletModel walletModel(interfaces::MakeWallet(wallet), node, platformStyle.get(), &optionsModel);
+    WalletModel walletModel(interfaces::MakeWallet(wallet), clientModel, platformStyle.get());
     RemoveWallet(wallet);
     EditAddressDialog editAddressDialog(EditAddressDialog::NewSendingAddress);
     editAddressDialog.setModel(walletModel.getAddressTableModel());

src/qt/test/wallettests.cpp

@@ -4,6 +4,7 @@
 #include <interfaces/chain.h>
 #include <interfaces/node.h>
 #include <qt/bitcoinamountfield.h>
+#include <qt/clientmodel.h>
 #include <qt/optionsmodel.h>
 #include <qt/platformstyle.h>
 #include <qt/qvalidatedlineedit.h>
@@ -165,8 +166,9 @@ void TestGUI(interfaces::Node& node)
     SendCoinsDialog sendCoinsDialog(platformStyle.get());
     TransactionView transactionView(platformStyle.get());
     OptionsModel optionsModel(node);
+    ClientModel clientModel(node, &optionsModel);
     AddWallet(wallet);
-    WalletModel walletModel(interfaces::MakeWallet(wallet), node, platformStyle.get(), &optionsModel);
+    WalletModel walletModel(interfaces::MakeWallet(wallet), clientModel, platformStyle.get());
     RemoveWallet(wallet);
     sendCoinsDialog.setModel(&walletModel);
     transactionView.setModel(&walletModel);

src/qt/transactiontablemodel.cpp

@@ -5,6 +5,7 @@
 #include <qt/transactiontablemodel.h>
 
 #include <qt/addresstablemodel.h>
+#include <qt/clientmodel.h>
 #include <qt/guiconstants.h>
 #include <qt/guiutil.h>
 #include <qt/optionsmodel.h>
@@ -175,7 +176,7 @@ public:
         return cachedWallet.size();
     }
 
-    TransactionRecord *index(interfaces::Wallet& wallet, int idx)
+    TransactionRecord *index(interfaces::Wallet& wallet, const int cur_num_blocks, const int idx)
     {
         if(idx >= 0 && idx < cachedWallet.size())
         {
@@ -191,7 +192,7 @@ public:
             interfaces::WalletTxStatus wtx;
             int numBlocks;
             int64_t block_time;
-            if (wallet.tryGetTxStatus(rec->hash, wtx, numBlocks, block_time) && rec->statusUpdateNeeded(numBlocks)) {
+            if (rec->statusUpdateNeeded(cur_num_blocks) && wallet.tryGetTxStatus(rec->hash, wtx, numBlocks, block_time)) {
                 rec->updateStatus(wtx, numBlocks, block_time);
             }
             return rec;
@@ -663,10 +664,10 @@ QVariant TransactionTableModel::headerData(int section, Qt::Orientation orientat
 QModelIndex TransactionTableModel::index(int row, int column, const QModelIndex &parent) const
 {
     Q_UNUSED(parent);
-    TransactionRecord *data = priv->index(walletModel->wallet(), row);
+    TransactionRecord *data = priv->index(walletModel->wallet(), walletModel->clientModel().getNumBlocks(), row);
     if(data)
     {
-        return createIndex(row, column, priv->index(walletModel->wallet(), row));
+        return createIndex(row, column, data);
     }
     return QModelIndex();
 }

src/qt/walletcontroller.cpp

@@ -5,6 +5,7 @@
 #include <qt/walletcontroller.h>
 
 #include <qt/askpassphrasedialog.h>
+#include <qt/clientmodel.h>
 #include <qt/createwalletdialog.h>
 #include <qt/guiconstants.h>
 #include <qt/guiutil.h>
@@ -24,13 +25,14 @@
 #include <QTimer>
 #include <QWindow>
 
-WalletController::WalletController(interfaces::Node& node, const PlatformStyle* platform_style, OptionsModel* options_model, QObject* parent)
+WalletController::WalletController(ClientModel& client_model, const PlatformStyle* platform_style, QObject* parent)
     : QObject(parent)
     , m_activity_thread(new QThread(this))
     , m_activity_worker(new QObject)
-    , m_node(node)
+    , m_client_model(client_model)
+    , m_node(client_model.node())
     , m_platform_style(platform_style)
-    , m_options_model(options_model)
+    , m_options_model(client_model.getOptionsModel())
 {
     m_handler_load_wallet = m_node.handleLoadWallet([this](std::unique_ptr<interfaces::Wallet> wallet) {
         getOrCreateWallet(std::move(wallet));
@@ -104,7 +106,7 @@ WalletModel* WalletController::getOrCreateWallet(std::unique_ptr<interfaces::Wal
     }
 
     // Instantiate model and register it.
-    WalletModel* wallet_model = new WalletModel(std::move(wallet), m_node, m_platform_style, m_options_model, nullptr);
+    WalletModel* wallet_model = new WalletModel(std::move(wallet), m_client_model, m_platform_style, nullptr);
     // Handler callback runs in a different thread so fix wallet model thread affinity.
     wallet_model->moveToThread(thread());
     wallet_model->setParent(this);

src/qt/walletcontroller.h

@@ -21,6 +21,7 @@
 #include <QTimer>
 #include <QString>
 
+class ClientModel;
 class OptionsModel;
 class PlatformStyle;
 class WalletModel;
@@ -47,7 +48,7 @@ class WalletController : public QObject
     void removeAndDeleteWallet(WalletModel* wallet_model);
 
 public:
-    WalletController(interfaces::Node& node, const PlatformStyle* platform_style, OptionsModel* options_model, QObject* parent);
+    WalletController(ClientModel& client_model, const PlatformStyle* platform_style, QObject* parent);
     ~WalletController();
 
     //! Returns wallet models currently open.
@@ -70,6 +71,7 @@ Q_SIGNALS:
 private:
     QThread* const m_activity_thread;
     QObject* const m_activity_worker;
+    ClientModel& m_client_model;
     interfaces::Node& m_node;
     const PlatformStyle* const m_platform_style;
     OptionsModel* const m_options_model;

src/qt/walletmodel.cpp

@@ -9,6 +9,7 @@
 #include <qt/walletmodel.h>
 
 #include <qt/addresstablemodel.h>
+#include <qt/clientmodel.h>
 #include <qt/guiconstants.h>
 #include <qt/optionsmodel.h>
 #include <qt/paymentserver.h>
@@ -32,8 +33,13 @@
 #include <QTimer>
 
 
-WalletModel::WalletModel(std::unique_ptr<interfaces::Wallet> wallet, interfaces::Node& node, const PlatformStyle *platformStyle, OptionsModel *_optionsModel, QObject *parent) :
-    QObject(parent), m_wallet(std::move(wallet)), m_node(node), optionsModel(_optionsModel), addressTableModel(nullptr),
+WalletModel::WalletModel(std::unique_ptr<interfaces::Wallet> wallet, ClientModel& client_model, const PlatformStyle *platformStyle, QObject *parent) :
+    QObject(parent),
+    m_wallet(std::move(wallet)),
+    m_client_model(client_model),
+    m_node(client_model.node()),
+    optionsModel(client_model.getOptionsModel()),
+    addressTableModel(nullptr),
     transactionTableModel(nullptr),
     recentRequestsTableModel(nullptr),
     cachedEncryptionStatus(Unencrypted),

src/qt/walletmodel.h

@@ -24,6 +24,7 @@
 enum class OutputType;
 
 class AddressTableModel;
+class ClientModel;
 class OptionsModel;
 class PlatformStyle;
 class RecentRequestsTableModel;
@@ -52,7 +53,7 @@ class WalletModel : public QObject
     Q_OBJECT
 
 public:
-    explicit WalletModel(std::unique_ptr<interfaces::Wallet> wallet, interfaces::Node& node, const PlatformStyle *platformStyle, OptionsModel *optionsModel, QObject *parent = nullptr);
+    explicit WalletModel(std::unique_ptr<interfaces::Wallet> wallet, ClientModel& client_model, const PlatformStyle *platformStyle, QObject *parent = nullptr);
     ~WalletModel();
 
     enum StatusCode // Returned by sendCoins
@@ -145,6 +146,7 @@ public:
 
     interfaces::Node& node() const { return m_node; }
     interfaces::Wallet& wallet() const { return *m_wallet; }
+    ClientModel& clientModel() const { return m_client_model; }
 
     QString getWalletName() const;
     QString getDisplayName() const;
@@ -161,6 +163,7 @@ private:
     std::unique_ptr<interfaces::Handler> m_handler_show_progress;
     std::unique_ptr<interfaces::Handler> m_handler_watch_only_changed;
     std::unique_ptr<interfaces::Handler> m_handler_can_get_addrs_changed;
+    ClientModel& m_client_model;
     interfaces::Node& m_node;
 
     bool fHaveWatchOnly;