wizard: Ensure temporary wallet files are deleted

oshelper.cpp

@@ -1,6 +1,8 @@
 #include "oshelper.h"
 #include <QTemporaryFile>
 #include <QDir>
+#include <QDebug>
+#include <QString>
 
 OSHelper::OSHelper(QObject *parent) : QObject(parent)
 {
@@ -18,6 +20,16 @@ QString OSHelper::temporaryFilename() const
     return tempFileName;
 }
 
+bool OSHelper::removeTemporaryWallet(const QString &fileName) const
+{
+    // Temporary files should be deleted automatically by default, in case they wouldn't, we delete them manually as well
+    bool cache_deleted = QFile::remove(fileName);
+    bool address_deleted = QFile::remove(fileName + ".address.txt");
+    bool keys_deleted = QFile::remove(fileName +".keys");
+
+    return cache_deleted && address_deleted && keys_deleted;
+}
+
 QString OSHelper::temporaryPath() const
 {
     return QDir::tempPath();