Import wallet from keys (view-only)

Signed-off-by: dsc <dsc@xmr.pm>

src/appcontext.cpp

@@ -341,6 +341,13 @@ void AppContext::onWalletOpened(Wallet *wallet) {
 
     // force trigger preferredFiat signal for history model
     this->onPreferredFiatCurrencyChanged(config()->get(Config::preferredFiatCurrency).toString());
+
+    // (window) title
+    QFileInfo fileInfo(this->walletPath);
+    auto title = QString("Feather - [%1]").arg(fileInfo.fileName());
+    if(this->currentWallet->viewOnly())
+        title += " [view-only]";
+    emit setTitle(title);
 }
 
 void AppContext::onWSMessage(const QJsonObject &msg) {
@@ -541,6 +548,43 @@ void AppContext::createWallet(FeatherSeed seed, const QString &path, const QStri
         return;
     }
 
+    this->createWalletFinish(password);
+}
+
+void AppContext::createWalletViewOnly(const QString &path, const QString &password, const QString &address, const QString &viewkey, const QString &spendkey, quint64 restoreHeight) {
+    if(Utils::fileExists(path)) {
+        auto err = QString("Failed to write wallet to path: \"%1\"; file already exists.").arg(path);
+        qCritical() << err;
+        emit walletCreatedError(err);
+        return;
+    }
+
+    if(!this->walletManager->addressValid(address, this->networkType)) {
+        auto err = QString("Failed to create wallet. Invalid address provided.").arg(path);
+        qCritical() << err;
+        emit walletCreatedError(err);
+        return;
+    }
+
+    if(!this->walletManager->keyValid(viewkey, address, true, this->networkType)) {
+        auto err = QString("Failed to create wallet. Invalid viewkey provided.").arg(path);
+        qCritical() << err;
+        emit walletCreatedError(err);
+        return;
+    }
+
+    if(!spendkey.isEmpty() && !this->walletManager->keyValid(spendkey, address, false, this->networkType)) {
+        auto err = QString("Failed to create wallet. Invalid spendkey provided.").arg(path);
+        qCritical() << err;
+        emit walletCreatedError(err);
+        return;
+    }
+
+    this->currentWallet = this->walletManager->createWalletFromKeys(path, this->seedLanguage, this->networkType, address, viewkey, spendkey, restoreHeight);
+    this->createWalletFinish(password);
+}
+
+void AppContext::createWalletFinish(const QString &password) {
     this->currentWallet->setPassword(password);
     this->currentWallet->store();
     this->walletPassword = password;
@@ -614,8 +658,9 @@ void AppContext::onOpenAliasResolve(const QString &openAlias) {
 }
 
 void AppContext::donateBeg() {
-    if(this->networkType != NetworkType::Type::MAINNET)
+    if(this->currentWallet == nullptr) return;
-        return;
+    if(this->networkType != NetworkType::Type::MAINNET) return;
+    if(this->currentWallet->viewOnly()) return;
 
     auto donationCounter = config()->get(Config::donateBeg).toInt();
     if(donationCounter == -1)

src/appcontext.h

@@ -68,6 +68,7 @@ public:
     PendingTransaction::Priority tx_priority = PendingTransaction::Priority::Priority_Low;
     quint32 tx_mixin = static_cast<const quint32 &>(10);
     static constexpr const double cdiv = 1e12;
+    QString seedLanguage = "English";  // 14 word `monero-seed` only has English
 
     QNetworkAccessManager *network;
     QNetworkAccessManager *networkClearnet;
@@ -89,6 +90,8 @@ public:
     WalletManager *walletManager;
     Wallet *currentWallet = nullptr;
     void createWallet(FeatherSeed seed, const QString &path, const QString &password);
+    void createWalletViewOnly(const QString &path, const QString &password, const QString &address, const QString &viewkey, const QString &spendkey, quint64 restoreHeight);
+    void createWalletFinish(const QString &password);
     void syncStatusUpdated(quint64 height, quint64 target);
     void updateBalance();
     void initTor();
@@ -160,6 +163,7 @@ signals:
     void initiateTransaction();
     void endTransaction();
     void walletClosing();
+    void setTitle(const QString &title); // set window title
 
 private:
     void sorry();

src/dialog/viewonlydialog.cpp

@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: BSD-3-Clause
+// Copyright (c) 2020, The Monero Project.
+
+#include <QFileDialog>
+#include <QInputDialog>
+#include <QMessageBox>
+
+#include "viewonlydialog.h"
+#include "ui_viewonlydialog.h"
+
+ViewOnlyDialog::ViewOnlyDialog(AppContext *ctx, QWidget *parent)
+        : QDialog(parent)
+        , ui(new Ui::ViewOnlyDialog), m_ctx(ctx)
+{
+    ui->setupUi(this);
+
+    ui->label_restoreHeight->setText(QString::number(ctx->currentWallet->getWalletCreationHeight()));
+    ui->label_primaryAddress->setText(ctx->currentWallet->address(0, 0));
+    ui->label_secretViewKey->setText(ctx->currentWallet->getSecretViewKey());
+
+    connect(ui->btn_Copy, &QPushButton::clicked, this, &ViewOnlyDialog::copyToClipboad);
+    connect(ui->btn_Save, &QPushButton::clicked, this, &ViewOnlyDialog::onWriteViewOnlyWallet);
+
+    ui->btn_Save->setEnabled(!m_ctx->currentWallet->viewOnly());
+    this->adjustSize();
+}
+
+void ViewOnlyDialog::onWriteViewOnlyWallet(){
+    QString fn = QFileDialog::getSaveFileName(this, "Save .keys wallet file", QDir::homePath(), "Monero wallet (*.keys)");
+    if(fn.isEmpty()) return;
+    if(!fn.endsWith(".keys")) fn += ".keys";
+
+    QString passwd;
+    QInputDialog passwordDialog(this);
+    passwordDialog.setInputMode(QInputDialog::TextInput);
+    passwordDialog.setTextEchoMode(QLineEdit::Password);
+    passwordDialog.setWindowTitle("View-Only wallet password");
+    passwordDialog.setLabelText("Protect this view-only wallet with a password?");
+    passwordDialog.resize(300, 100);
+    if((bool)passwordDialog.exec())
+        passwd = passwordDialog.textValue();
+
+    m_ctx->currentWallet->createViewOnly(fn, passwd);
+
+    QMessageBox::information(this, "Information", "View-only wallet successfully written to disk.");
+}
+
+void ViewOnlyDialog::copyToClipboad() {
+    QString text = "";
+    text += QString("Address: %1\n").arg(ui->label_primaryAddress->text());
+    text += QString("Secret view key: %1\n").arg(ui->label_secretViewKey->text());
+    text += QString("Restore height: %1\n").arg(ui->label_restoreHeight->text());
+    Utils::copyToClipboard(text);
+}
+
+ViewOnlyDialog::~ViewOnlyDialog()
+{
+    delete ui;
+}

src/dialog/viewonlydialog.h

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: BSD-3-Clause
+// Copyright (c) 2020, The Monero Project.
+
+#ifndef FEATHER_VIEWONLYDIALOG_H
+#define FEATHER_VIEWONLYDIALOG_H
+
+#include <QDialog>
+#include "appcontext.h"
+
+namespace Ui {
+    class ViewOnlyDialog;
+}
+
+class ViewOnlyDialog : public QDialog
+{
+Q_OBJECT
+
+public:
+    explicit ViewOnlyDialog(AppContext *ctx, QWidget *parent = nullptr);
+    ~ViewOnlyDialog() override;
+
+private slots:
+    void onWriteViewOnlyWallet();
+
+private:
+    Ui::ViewOnlyDialog *ui;
+    AppContext *m_ctx = nullptr;
+    void copyToClipboad();
+};
+
+
+#endif //FEATHER_KEYSDIALOG_H

src/dialog/viewonlydialog.ui

@@ -0,0 +1,139 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ViewOnlyDialog</class>
+ <widget class="QDialog" name="ViewOnlyDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>659</width>
+    <height>254</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>View-Only</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox_6">
+     <property name="title">
+      <string>Restore height</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_6">
+      <item>
+       <widget class="QLabel" name="label_restoreHeight">
+        <property name="text">
+         <string>TextLabel</string>
+        </property>
+        <property name="textInteractionFlags">
+         <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByMouse</set>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Primary address</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLabel" name="label_primaryAddress">
+        <property name="text">
+         <string>TextLabel</string>
+        </property>
+        <property name="textInteractionFlags">
+         <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByMouse</set>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_2">
+     <property name="title">
+      <string>Secret view key</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_3">
+      <item>
+       <widget class="QLabel" name="label_secretViewKey">
+        <property name="text">
+         <string>TextLabel</string>
+        </property>
+        <property name="textInteractionFlags">
+         <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByMouse</set>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout_2">
+     <item>
+      <widget class="QPushButton" name="btn_Copy">
+       <property name="text">
+        <string>Copy</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="btn_Save">
+       <property name="text">
+        <string>Create view-only wallet</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDialogButtonBox" name="buttonBox">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="standardButtons">
+        <set>QDialogButtonBox::Ok</set>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>ViewOnlyDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>ViewOnlyDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/mainwindow.cpp

@@ -16,6 +16,7 @@
 #include "dialog/debuginfodialog.h"
 #include "dialog/walletinfodialog.h"
 #include "dialog/torinfodialog.h"
+#include "dialog/viewonlydialog.h"
 #include "utils/utils.h"
 #include "utils/config.h"
 #include "components.h"
@@ -325,6 +326,10 @@ MainWindow::MainWindow(AppContext *ctx, QWidget *parent) :
     connect(m_ctx, &AppContext::walletClosing, [=]{
         ui->tabWidget->setCurrentIndex(0);
     });
+
+    // window title
+    connect(m_ctx, &AppContext::setTitle, this, &QMainWindow::setWindowTitle);
+
     // setup some UI
     this->initMain();
     this->initWidgets();
@@ -389,6 +394,7 @@ void MainWindow::initMenu() {
     connect(ui->actionSeed, &QAction::triggered, this, &MainWindow::showSeedDialog);
     connect(ui->actionPassword, &QAction::triggered, this, &MainWindow::showPasswordDialog);
     connect(ui->actionKeys, &QAction::triggered, this, &MainWindow::showKeysDialog);
+    connect(ui->actionViewOnly, &QAction::triggered, this, &MainWindow::showViewOnlyDialog);
     connect(ui->actionStore_wallet, &QAction::triggered, [&]{
         m_ctx->currentWallet->store();
     });
@@ -412,7 +418,8 @@ void MainWindow::initMenu() {
     connect(ui->actionExport_CSV, &QAction::triggered, [=]{
         if(m_ctx->currentWallet == nullptr) return;
         QString fn = QFileDialog::getSaveFileName(this, "Save CSV file", QDir::homePath(), "CSV (*.csv)");
-        if(!fn.startsWith(".csv")) fn += ".csv";
+        if(fn.isEmpty()) return;
+        if(!fn.endsWith(".csv")) fn += ".csv";
         m_ctx->currentWallet->history()->writeCSV(fn);
         Utils::showMessageBox("CSV export", QString("Transaction history exported to %1").arg(fn), false);
     });
@@ -543,10 +550,6 @@ void MainWindow::onWalletOpened() {
     else
         m_statusLabelStatus->setText("Wallet opened - Searching for node");
 
-    // window title as wallet name
-    QFileInfo fileInfo(m_ctx->walletPath);
-    this->setWindowTitle(QString("Feather - [%1]").arg(fileInfo.fileName()));
-
     connect(m_ctx->currentWallet, &Wallet::connectionStatusChanged, this, &MainWindow::onConnectionStatusChanged);
 
     // receive page
@@ -850,6 +853,12 @@ void MainWindow::showKeysDialog() {
     dialog->deleteLater();
 }
 
+void MainWindow::showViewOnlyDialog() {
+    auto *dialog = new ViewOnlyDialog(m_ctx, this);
+    dialog->exec();
+    dialog->deleteLater();
+}
+
 void MainWindow::menuTorClicked() {
 
     auto *dialog = new TorInfoDialog(m_ctx, this);

src/mainwindow.h

@@ -79,6 +79,7 @@ public slots:
     void showConnectionStatusDialog();
     void showPasswordDialog();
     void showKeysDialog();
+    void showViewOnlyDialog();
     void donateButtonClicked();
     void showCalcWindow();
     void showSendTab();

src/mainwindow.ui

@@ -291,7 +291,7 @@
      <x>0</x>
      <y>0</y>
      <width>894</width>
-     <height>30</height>
+     <height>22</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -335,6 +335,7 @@
     <addaction name="actionPassword"/>
     <addaction name="actionSeed"/>
     <addaction name="actionKeys"/>
+    <addaction name="actionViewOnly"/>
     <addaction name="separator"/>
     <addaction name="menuHistory"/>
     <addaction name="menuContacts"/>
@@ -518,6 +519,21 @@
     <string>Debug info</string>
    </property>
   </action>
+  <action name="actionCreate_view_only_details">
+   <property name="text">
+    <string>Details</string>
+   </property>
+  </action>
+  <action name="actionCreate_view_only_wallet_file">
+   <property name="text">
+    <string>Export wallet file</string>
+   </property>
+  </action>
+  <action name="actionViewOnly">
+   <property name="text">
+    <string>View-Only</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>

src/utils/seeds.h

@@ -84,16 +84,16 @@ struct FeatherSeed {
     time_t time = 0;
     unsigned int restoreHeight = 0;
     RestoreHeightLookup *lookup = nullptr;
-    QString language = "English";
+    QString language;
     std::string coinName;
-    explicit FeatherSeed(RestoreHeightLookup *lookup, const std::string &coinName = "monero") : lookup(lookup), coinName(coinName) {}
+    explicit FeatherSeed(RestoreHeightLookup *lookup, const std::string &coinName = "monero", const QString &language = "English") : lookup(lookup), coinName(coinName), language(language) {}
 
     static FeatherSeed fromSeed(RestoreHeightLookup *lookup,
                                 const std::string &coinName,
+                                const QString &seedLanguage,
                                 const std::string &mnemonicSeed) {
 
-        auto rtn = FeatherSeed(lookup, coinName);
+        auto rtn = FeatherSeed(lookup, coinName, seedLanguage);
-        rtn.coinName = coinName;
         rtn.lookup = lookup;
         rtn.mnemonicSeed = QString::fromStdString(mnemonicSeed);
 
@@ -108,8 +108,8 @@ struct FeatherSeed {
         return rtn;
     }
 
-    static FeatherSeed generate(RestoreHeightLookup *lookup, const std::string &coinName) {
+    static FeatherSeed generate(RestoreHeightLookup *lookup, const std::string &coinName, const QString &language) {
-        auto rtn = FeatherSeed(lookup, coinName);
+        auto rtn = FeatherSeed(lookup, coinName, language);
         time_t _time = std::time(nullptr);
         monero_seed seed(_time, coinName);
 
@@ -130,7 +130,7 @@ struct FeatherSeed {
         if(this->lookup == nullptr) return wallet;
         if(this->mnemonicSeed.split(" ").count() == 14) {
             if(this->spendKey.isEmpty()) {
-                auto _seed = FeatherSeed::fromSeed(this->lookup, this->coinName, this->mnemonicSeed.toStdString());
+                auto _seed = FeatherSeed::fromSeed(this->lookup, this->coinName, this->language, this->mnemonicSeed.toStdString());
                 _seed.setRestoreHeight();
                 this->time = _seed.time;
                 this->restoreHeight = _seed.restoreHeight;

src/wizard/createwallet.cpp

@@ -82,7 +82,12 @@ bool CreateWalletPage::validateWidgets(){
 
 int CreateWalletPage::nextId() const {
     auto restoredSeed = this->field("mnemonicRestoredSeed").toString();
-    return restoredSeed.isEmpty() ? WalletWizard::Page_CreateWalletSeed : -1;
+    auto restoredViewOnlyKey = this->field("viewOnlyViewKey").toString();
+
+    if(!restoredSeed.isEmpty() || !restoredViewOnlyKey.isEmpty())
+        return -1;
+
+    return WalletWizard::Page_CreateWalletSeed;
 }
 
 bool CreateWalletPage::validatePage() {
@@ -93,6 +98,7 @@ bool CreateWalletPage::validatePage() {
     ui->walletName->setStyleSheet("");
 
     auto restoredSeed = this->field("mnemonicRestoredSeed").toString();
-    if(!restoredSeed.isEmpty()) emit createWallet();
+    auto restoredViewOnlyKey = this->field("viewOnlyViewKey").toString();
+    if(!restoredSeed.isEmpty() || !restoredViewOnlyKey.isEmpty()) emit createWallet();
     return true;
 }

src/wizard/createwalletseed.cpp

@@ -37,7 +37,7 @@ CreateWalletSeedPage::CreateWalletSeedPage(AppContext *ctx, QWidget *parent) :
 void CreateWalletSeedPage::seedRoulette(int count) {
     count += 1;
     if(count > m_rouletteSpin) return;
-    auto seed = FeatherSeed::generate(m_ctx->restoreHeights[m_ctx->networkType], m_ctx->coinName.toStdString());
+    auto seed = FeatherSeed::generate(m_ctx->restoreHeights[m_ctx->networkType], m_ctx->coinName.toStdString(), m_ctx->seedLanguage);
     m_mnemonic = seed.mnemonicSeed;
     m_restoreHeight = seed.restoreHeight;
 

src/wizard/menu.cpp

@@ -28,6 +28,8 @@ int MenuPage::nextId() const {
         return WalletWizard::Page_CreateWallet;
     if(ui->radioSeed->isChecked())
         return WalletWizard::Page_Restore;
+    if(ui->radioViewOnly->isChecked())
+        return WalletWizard::Page_ViewOnly;
     return 0;
 }
 

src/wizard/menu.ui

@@ -48,6 +48,13 @@
      </property>
     </widget>
    </item>
+   <item>
+    <widget class="QRadioButton" name="radioViewOnly">
+     <property name="text">
+      <string>Import from keys</string>
+     </property>
+    </widget>
+   </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">

src/wizard/restorewallet.cpp

@@ -130,7 +130,7 @@ bool RestorePage::validatePage() {
             }
         }
 
-        auto _seed = FeatherSeed::fromSeed(m_ctx->restoreHeights[m_ctx->networkType], "monero", seed.toStdString());
+        auto _seed = FeatherSeed::fromSeed(m_ctx->restoreHeights[m_ctx->networkType], m_ctx->coinName.toStdString(), m_ctx->seedLanguage, seed.toStdString());
         restoreHeight = _seed.restoreHeight;
 
         this->setField("restoreHeight", restoreHeight);
@@ -153,7 +153,7 @@ bool RestorePage::validatePage() {
             }
         }
 
-        auto _seed = FeatherSeed::fromSeed(m_ctx->restoreHeights[m_ctx->networkType], "monero", seed.toStdString());
+        auto _seed = FeatherSeed::fromSeed(m_ctx->restoreHeights[m_ctx->networkType], m_ctx->coinName.toStdString(), m_ctx->seedLanguage, seed.toStdString());
         _seed.setRestoreHeight(restoreHeight);
         this->setField("restoreHeight", restoreHeight);
         this->setField("mnemonicSeed", seed);

src/wizard/viewonlywallet.cpp

@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: BSD-3-Clause
+// Copyright (c) 2020, The Monero Project.
+
+#include "wizard/viewonlywallet.h"
+#include "wizard/walletwizard.h"
+#include "ui_viewonlywallet.h"
+
+#include <QLineEdit>
+#include <QPlainTextEdit>
+#include <QTextCharFormat>
+#include <QPushButton>
+#include <QButtonGroup>
+
+#include <monero_seed/wordlist.hpp>  // tevador 14 word
+
+#include "libwalletqt/WalletManager.h"
+
+ViewOnlyPage::ViewOnlyPage(AppContext *ctx, QWidget *parent) :
+        QWizardPage(parent),
+        ui(new Ui::ViewOnlyPage),
+        m_ctx(ctx) {
+    ui->setupUi(this);
+    this->setTitle("Import view only wallet");
+    ui->label_errorString->hide();
+
+    QFont f("feather");
+    f.setStyleHint(QFont::Monospace);
+
+    auto *viewOnlyViewKeyDummy = new QLineEdit(this);
+    viewOnlyViewKeyDummy->setVisible(false);
+    auto *viewOnlySpendKeyDummy = new QLineEdit(this);
+    viewOnlySpendKeyDummy->setVisible(false);
+    auto *viewOnlyAddressDummy = new QLineEdit(this);
+    viewOnlyAddressDummy->setVisible(false);
+    auto *restoreHeightDummy = new QLineEdit(this);
+    restoreHeightDummy->setVisible(false);
+
+    this->registerField("viewOnlySpendKey", viewOnlySpendKeyDummy);
+    this->registerField("viewOnlyViewKey", viewOnlyViewKeyDummy);
+    this->registerField("viewOnlyAddress", viewOnlyAddressDummy);
+    this->registerField("viewOnlyHeight", restoreHeightDummy);
+
+#ifndef QT_NO_CURSOR
+    QGuiApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
+    QGuiApplication::restoreOverrideCursor();
+#endif
+
+    if(m_ctx->networkType == NetworkType::Type::TESTNET) {
+        ui->restoreHeightWidget->hideSlider();
+    } else {
+        // load restoreHeight lookup db
+        ui->restoreHeightWidget->initRestoreHeights(m_ctx->restoreHeights[m_ctx->networkType]);
+    }
+
+    if(m_ctx->networkType == NetworkType::Type::MAINNET) {
+        ui->lineEdit_address->setPlaceholderText("4...");
+    } else if (m_ctx->networkType == NetworkType::Type::STAGENET) {
+        ui->lineEdit_address->setPlaceholderText("5...");
+    }
+}
+
+int ViewOnlyPage::nextId() const {
+    return WalletWizard::Page_CreateWallet;
+}
+
+void ViewOnlyPage::cleanupPage() const {}
+
+bool ViewOnlyPage::validatePage() {
+    auto errStyle = "QLineEdit{border: 1px solid red;}";
+
+    ui->lineEdit_address->setStyleSheet("");
+    ui->lineEdit_viewkey->setStyleSheet("");
+    ui->label_errorString->hide();
+
+    unsigned int restoreHeight = ui->restoreHeightWidget->getHeight();
+    auto spendkey = ui->lineEdit_spendkey->text().trimmed();
+    auto viewkey = ui->lineEdit_viewkey->text().trimmed();
+    auto address = ui->lineEdit_address->text().trimmed();
+
+    if(!m_ctx->walletManager->addressValid(address, m_ctx->networkType)){
+        ui->label_errorString->show();
+        ui->label_errorString->setText("Invalid address.");
+        ui->lineEdit_address->setStyleSheet(errStyle);
+        return false;
+    }
+
+    if(!m_ctx->walletManager->keyValid(viewkey, address, true, m_ctx->networkType)) {
+        ui->label_errorString->show();
+        ui->label_errorString->setText("Invalid key.");
+        ui->lineEdit_viewkey->setStyleSheet(errStyle);
+        return false;
+    }
+
+    if(!spendkey.isEmpty() && !m_ctx->walletManager->keyValid(spendkey, address, false, m_ctx->networkType)) {
+        ui->label_errorString->show();
+        ui->label_errorString->setText("Invalid key.");
+        ui->lineEdit_viewkey->setStyleSheet(errStyle);
+        return false;
+    }
+
+    this->setField("viewOnlyViewKey", viewkey);
+    this->setField("viewOnlySpendKey", spendkey);
+    this->setField("viewOnlyAddress", address);
+    this->setField("viewOnlyHeight", restoreHeight);
+    return true;
+}

src/wizard/viewonlywallet.h

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: BSD-3-Clause
+// Copyright (c) 2020, The Monero Project.
+
+#ifndef FEATHER_WIZARDVIEWONLY_H
+#define FEATHER_WIZARDVIEWONLY_H
+
+#include <QtCore>
+#include <QLabel>
+#include <QWizardPage>
+#include <QWidget>
+#include <QTextEdit>
+#include <QCompleter>
+
+#include "appcontext.h"
+
+namespace Ui {
+    class ViewOnlyPage;
+}
+
+class ViewOnlyPage : public QWizardPage
+{
+    Q_OBJECT
+
+public:
+    explicit ViewOnlyPage(AppContext *ctx, QWidget *parent = nullptr);
+    bool validatePage() override;
+    int nextId() const override;
+    void cleanupPage() const;
+
+private:
+    AppContext *m_ctx;
+    QLabel *topLabel;
+    Ui::ViewOnlyPage *ui;
+};
+
+#endif

src/wizard/viewonlywallet.ui

@@ -0,0 +1,119 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ViewOnlyPage</class>
+ <widget class="QWizardPage" name="ViewOnlyPage">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>502</width>
+    <height>506</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>ViewOnlyPage</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout_3">
+   <item>
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Standard address</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLineEdit" name="lineEdit_address"/>
+   </item>
+   <item>
+    <widget class="QLabel" name="label_2">
+     <property name="text">
+      <string>Secret view key</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLineEdit" name="lineEdit_viewkey"/>
+   </item>
+   <item>
+    <widget class="QLabel" name="label_3">
+     <property name="text">
+      <string>Secret spend key (optional)</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLineEdit" name="lineEdit_spendkey"/>
+   </item>
+   <item>
+    <widget class="QFrame" name="restoreFrame">
+     <property name="frameShape">
+      <enum>QFrame::NoFrame</enum>
+     </property>
+     <property name="frameShadow">
+      <enum>QFrame::Plain</enum>
+     </property>
+     <property name="lineWidth">
+      <number>0</number>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <widget class="RestoreHeightWidget" name="restoreHeightWidget" native="true"/>
+      </item>
+      <item>
+       <widget class="QLabel" name="label_restoreHeightInfo">
+        <property name="text">
+         <string>You may specify the &quot;restore height&quot;. This is the moment the wallet was created, expressed through a blockheight (number). This speeds up wallet refreshes. If you don't know, leave it empty.</string>
+        </property>
+        <property name="wordWrap">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLabel" name="label_errorString">
+     <property name="text">
+      <string>errorString</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>RestoreHeightWidget</class>
+   <extends>QWidget</extends>
+   <header>widgets/restoreheightwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

src/wizard/walletwizard.cpp

@@ -9,9 +9,11 @@
 #include "wizard/network.h"
 #include "wizard/createwalletseed.h"
 #include "wizard/restorewallet.h"
+#include "wizard/viewonlywallet.h"
 
 #include <QStyle>
 #include <QLabel>
+#include <QLineEdit>
 #include <QVBoxLayout>
 #include <QScreen>
 #include <QApplication>
@@ -29,6 +31,7 @@ WalletWizard::WalletWizard(AppContext *ctx, WalletWizard::Page startPage, QWidge
     setPage(Page_CreateWalletSeed, createWalletSeed);
     setPage(Page_Network, new NetworkPage(m_ctx, this));
     setPage(Page_Restore, new RestorePage(m_ctx, this));
+    setPage(Page_ViewOnly, new ViewOnlyPage(m_ctx, this));
 
     if(config()->get(Config::firstRun).toUInt())
         setStartId(Page_Network);
@@ -58,8 +61,20 @@ void WalletWizard::createWallet() {
     const auto walletPath = this->field("walletPath").toString();
     const auto walletPasswd = this->field("walletPasswd").toString();
     auto restoreHeight = this->field("restoreHeight").toUInt();
+    auto viewKey = this->field("viewOnlyViewKey").toString();
+    auto spendKey = this->field("viewOnlySpendKey").toString();
+    auto viewAddress = this->field("viewOnlyAddress").toString();
 
-    auto seed = FeatherSeed::fromSeed(m_ctx->restoreHeights[m_ctx->networkType], m_ctx->coinName.toStdString(), mnemonicSeed.toStdString());
+    if(!viewKey.isEmpty() && !viewAddress.isEmpty()) {
+        auto viewHeight = this->field("viewOnlyHeight").toUInt();
+        m_ctx->createWalletViewOnly(walletPath,
+                                    walletPasswd,
+                                    viewAddress,
+                                    viewKey, spendKey, viewHeight);
+        return;
+    }
+
+    auto seed = FeatherSeed::fromSeed(m_ctx->restoreHeights[m_ctx->networkType], m_ctx->coinName.toStdString(), m_ctx->seedLanguage, mnemonicSeed.toStdString());
     if(restoreHeight > 0)
         seed.setRestoreHeight(restoreHeight);
     m_ctx->createWallet(seed, walletPath, walletPasswd);

src/wizard/walletwizard.h

@@ -17,7 +17,7 @@ class WalletWizard : public QWizard
     Q_OBJECT
 
 public:
-    enum Page { Page_Menu, Page_CreateWallet, Page_CreateWalletSeed, Page_OpenWallet, Page_Network, Page_Restore };
+    enum Page { Page_Menu, Page_CreateWallet, Page_CreateWalletSeed, Page_OpenWallet, Page_Network, Page_Restore, Page_ViewOnly };
 
     explicit WalletWizard(AppContext *ctx, WalletWizard::Page startPage = WalletWizard::Page::Page_Menu, QWidget *parent = nullptr);
 signals: