Settings: Rescan wallet cache button

pages/Settings.qml

@@ -121,6 +121,42 @@ Rectangle {
                     settingsPasswordDialog.open();
                 }
             }
+
+
+
+            StandardButton {
+                id: rescanWalletbutton
+                shadowReleasedColor: "#FF4304"
+                shadowPressedColor: "#B32D00"
+                releasedColor: "#FF6C3C"
+                pressedColor: "#FF4304"
+                text: qsTr("Rescan wallet cache") + translationManager.emptyString
+                onClicked: {
+                    // Show confirmation dialog
+                    confirmationDialog.title = qsTr("Rescan wallet cache") + translationManager.emptyString;
+                    confirmationDialog.text  = qsTr("Are you sure you want to rebuild the wallet cache?\n"
+                                                    + "The following information will be deleted\n"
+                                                    + "- Recipient addresses\n"
+                                                    + "- Tx keys\n"
+                                                    + "- Tx descriptions\n\n"
+                                                    + "The old wallet cache file will be renamed and can be restored later.\n"
+                                                    );
+                    confirmationDialog.icon = StandardIcon.Question
+                    confirmationDialog.cancelText = qsTr("Cancel")
+                    confirmationDialog.onAcceptedCallback = function() {
+                        walletManager.closeWallet();
+                        walletManager.clearWalletCache(persistentSettings.wallet_path);
+                        walletManager.openWalletAsync(persistentSettings.wallet_path, appWindow.password,
+                                                          persistentSettings.testnet);
+                    }
+
+                    confirmationDialog.onRejectedCallback = null;
+
+                    confirmationDialog.open()
+
+                }
+            }
+
         }
 
         //! Manage daemon

src/libwalletqt/WalletManager.cpp

@@ -11,6 +11,7 @@
 #include <QtConcurrent/QtConcurrent>
 #include <QMutex>
 #include <QMutexLocker>
+#include <QString>
 
 WalletManager * WalletManager::m_instance = nullptr;
 
@@ -338,6 +339,24 @@ QString WalletManager::checkUpdates(const QString &software, const QString &subd
   return QString::fromStdString(std::get<1>(result) + "|" + std::get<2>(result) + "|" + std::get<3>(result) + "|" + std::get<4>(result));
 }
 
+bool WalletManager::clearWalletCache(const QString &wallet_path) const
+{
+
+    QString fileName = wallet_path;
+    // Make sure wallet file is not .keys
+    fileName.replace(".keys","");
+    QFile walletCache(fileName);
+    QString suffix = ".old_cache";
+    QString newFileName = fileName + suffix;
+
+    // create unique file name
+    for (int i = 1; QFile::exists(newFileName); i++) {
+       newFileName = QString("%1%2.%3").arg(fileName).arg(suffix).arg(i);
+    }
+
+    return walletCache.rename(newFileName);
+}
+
 WalletManager::WalletManager(QObject *parent) : QObject(parent)
 {
     m_pimpl =  Monero::WalletManagerFactory::getWalletManager();

src/libwalletqt/WalletManager.h

@@ -136,6 +136,9 @@ public:
     Q_INVOKABLE bool saveQrCode(const QString &, const QString &) const;
     Q_INVOKABLE QString checkUpdates(const QString &software, const QString &subdir) const;
 
+    // clear/rename wallet cache
+    Q_INVOKABLE bool clearWalletCache(const QString &fileName) const;
+
 signals:
 
     void walletOpened(Wallet * wallet);