Wallet: async fetching wallet, daemon and target height

main.qml

@@ -293,6 +293,7 @@ ApplicationWindow {
 
         // Disconnect all listeners
         if (typeof currentWallet !== "undefined" && currentWallet !== null) {
+            currentWallet.heightRefreshed.disconnect(onHeightRefreshed);
             currentWallet.refreshed.disconnect(onWalletRefresh)
             currentWallet.updated.disconnect(onWalletUpdate)
             currentWallet.newBlock.disconnect(onWalletNewBlock)
@@ -351,6 +352,7 @@ ApplicationWindow {
         }
 
         // connect handlers
+        currentWallet.heightRefreshed.connect(onHeightRefreshed);
         currentWallet.refreshed.connect(onWalletRefresh)
         currentWallet.updated.connect(onWalletUpdate)
         currentWallet.newBlock.connect(onWalletNewBlock)
@@ -621,18 +623,7 @@ ApplicationWindow {
         remoteNodeConnected = false;
     }
 
-    function onWalletRefresh() {
+    function onHeightRefreshed(bcHeight, dCurrentBlock, dTargetBlock) {
-        console.log(">>> wallet refreshed")
-
-        // Daemon connected
-        leftPanel.networkStatus.connected = currentWallet.connected()
-
-        // Wallet height
-        var bcHeight = currentWallet.blockChainHeight();
-
-        // Check daemon status
-        var dCurrentBlock = currentWallet.daemonBlockChainHeight();
-        var dTargetBlock = currentWallet.daemonBlockChainTargetHeight();
         // Daemon fully synced
         // TODO: implement onDaemonSynced or similar in wallet API and don't start refresh thread before daemon is synced
         // targetBlock = currentBlock = 1 before network connection is established.
@@ -683,6 +674,15 @@ ApplicationWindow {
         onWalletUpdate();
     }
 
+    function onWalletRefresh() {
+        console.log(">>> wallet refreshed")
+
+        // Daemon connected
+        leftPanel.networkStatus.connected = currentWallet.connected()
+
+        currentWallet.refreshHeightAsync();
+    }
+
     function startDaemon(flags){
         // Pause refresh while starting daemon
         currentWallet.pauseRefresh();

src/libwalletqt/Wallet.cpp

@@ -348,6 +348,19 @@ void Wallet::setSubaddressLabel(quint32 accountIndex, quint32 addressIndex, cons
     m_walletImpl->setSubaddressLabel(accountIndex, addressIndex, label.toStdString());
 }
 
+void Wallet::refreshHeightAsync() const
+{
+    QtConcurrent::run([this] {
+        QFuture<quint64> daemonHeight = QtConcurrent::run([this] {
+            return daemonBlockChainHeight();
+        });
+        QFuture<quint64> targetHeight = QtConcurrent::run([this] {
+            return daemonBlockChainTargetHeight();
+        });
+        emit heightRefreshed(blockChainHeight(), daemonHeight.result(), targetHeight.result());
+    });
+}
+
 quint64 Wallet::blockChainHeight() const
 {
     return m_walletImpl->blockChainHeight();

src/libwalletqt/Wallet.h

@@ -181,15 +181,7 @@ public:
     //! returns if view only wallet
     Q_INVOKABLE bool viewOnly() const;
 
-    //! returns current wallet's block height
+    Q_INVOKABLE void refreshHeightAsync() const;
-    //! (can be less than daemon's blockchain height when wallet sync in progress)
-    Q_INVOKABLE quint64 blockChainHeight() const;
-
-    //! returns daemon's blockchain height
-    Q_INVOKABLE quint64 daemonBlockChainHeight() const;
-
-    //! returns daemon's blockchain target height
-    Q_INVOKABLE quint64 daemonBlockChainTargetHeight() const;
 
     //! export/import key images
     Q_INVOKABLE bool exportKeyImages(const QString& path);
@@ -355,6 +347,7 @@ signals:
     void deviceButtonRequest(quint64 buttonCode);
     void deviceButtonPressed();
     void transactionCommitted(bool status, PendingTransaction *t, QStringList txid);
+    void heightRefreshed(quint64 walletHeight, quint64 daemonHeight, quint64 targetHeight) const;
 
     // emitted when transaction is created async
     void transactionCreated(PendingTransaction * transaction, QString address, QString paymentId, quint32 mixinCount);
@@ -365,6 +358,17 @@ private:
     Wallet(QObject * parent = nullptr);
     Wallet(Monero::Wallet *w, QObject * parent = 0);
     ~Wallet();
+
+    //! returns current wallet's block height
+    //! (can be less than daemon's blockchain height when wallet sync in progress)
+    quint64 blockChainHeight() const;
+
+    //! returns daemon's blockchain height
+    quint64 daemonBlockChainHeight() const;
+
+    //! returns daemon's blockchain target height
+    quint64 daemonBlockChainTargetHeight() const;
+
 private:
     friend class WalletManager;
     friend class WalletListenerImpl;