Implement background sync when locked

src/libwalletqt/Wallet.cpp

@@ -529,6 +529,69 @@ bool Wallet::scanTransactions(const QVector<QString> &txids)
     return m_walletImpl->scanTransactions(c);
 }
 
+void Wallet::setupBackgroundSync(const Wallet::BackgroundSyncType background_sync_type, const QString &wallet_password)
+{
+    qDebug() << "Setting up background sync";
+    bool refreshEnabled = m_refreshEnabled;
+    pauseRefresh();
+
+    // run inside scheduler because of lag when stopping/starting refresh
+    m_scheduler.run([this, refreshEnabled, background_sync_type, &wallet_password] {
+        m_walletImpl->setupBackgroundSync(
+            static_cast<Monero::Wallet::BackgroundSyncType>(background_sync_type),
+            wallet_password.toStdString(),
+            Monero::optional<std::string>());
+        if (refreshEnabled)
+            startRefresh();
+        emit backgroundSyncSetup();
+    });
+}
+
+Wallet::BackgroundSyncType Wallet::getBackgroundSyncType() const
+{
+    return static_cast<BackgroundSyncType>(m_walletImpl->getBackgroundSyncType());
+}
+
+bool Wallet::isBackgroundWallet() const
+{
+    return m_walletImpl->isBackgroundWallet();
+}
+
+bool Wallet::isBackgroundSyncing() const
+{
+    return m_walletImpl->isBackgroundSyncing();
+}
+
+void Wallet::startBackgroundSync()
+{
+    qDebug() << "Starting background sync";
+    bool refreshEnabled = m_refreshEnabled;
+    pauseRefresh();
+
+    // run inside scheduler because of lag when stopping/starting refresh
+    m_scheduler.run([this, refreshEnabled] {
+        m_walletImpl->startBackgroundSync();
+        if (refreshEnabled)
+            startRefresh();
+        emit backgroundSyncStarted();
+    });
+}
+
+void Wallet::stopBackgroundSync(const QString &password)
+{
+    qDebug() << "Stopping background sync";
+    bool refreshEnabled = m_refreshEnabled;
+    pauseRefresh();
+
+    // run inside scheduler because of lag when stopping/starting refresh
+    m_scheduler.run([this, password, refreshEnabled] {
+        m_walletImpl->stopBackgroundSync(password.toStdString());
+        if (refreshEnabled)
+            startRefresh();
+        emit backgroundSyncStopped();
+    });
+}
+
 bool Wallet::refresh(bool historyAndSubaddresses /* = true */)
 {
     refreshingSet(true);

src/libwalletqt/Wallet.h

@@ -112,6 +112,14 @@ public:
 
     Q_ENUM(ConnectionStatus)
 
+    enum BackgroundSyncType {
+        BackgroundSync_Off            = Monero::Wallet::BackgroundSync_Off,
+        BackgroundSync_ReusePassword  = Monero::Wallet::BackgroundSync_ReusePassword,
+        BackgroundSync_CustomPassword = Monero::Wallet::BackgroundSync_CustomPassword
+    };
+
+    Q_ENUM(BackgroundSyncType)
+
     //! returns mnemonic seed
     QString getSeed() const;
 
@@ -215,6 +223,17 @@ public:
     //! scan transactions
     Q_INVOKABLE bool scanTransactions(const QVector<QString> &txids);
 
+    Q_INVOKABLE void setupBackgroundSync(const BackgroundSyncType background_sync_type, const QString &wallet_password);
+    Q_INVOKABLE BackgroundSyncType getBackgroundSyncType() const;
+    Q_INVOKABLE bool isBackgroundWallet() const;
+    Q_INVOKABLE bool isBackgroundSyncing() const;
+
+    //! scan in the background with just the view key (wipe the spend key)
+    Q_INVOKABLE void startBackgroundSync();
+
+    //! bring the spend key back and process background synced txs
+    Q_INVOKABLE void stopBackgroundSync(const QString &password);
+
     //! refreshes the wallet
     Q_INVOKABLE bool refresh(bool historyAndSubaddresses = true);
 
@@ -369,6 +388,9 @@ signals:
     void moneyReceived(const QString &txId, quint64 amount);
     void unconfirmedMoneyReceived(const QString &txId, quint64 amount);
     void newBlock(quint64 height, quint64 targetHeight);
+    void backgroundSyncSetup() const;
+    void backgroundSyncStarted() const;
+    void backgroundSyncStopped() const;
     void addressBookChanged() const;
     void historyModelChanged() const;
     void walletCreationHeightChanged();