[Qt] only update "amount of blocks left" when the header chain is in-sync

Author: jonasschnelli

src/qt/bitcoingui.cpp

@@ -500,7 +500,7 @@ void BitcoinGUI::setClientModel(ClientModel *clientModel)
             setTrayIconVisible(optionsModel->getHideTrayIcon());
         }
 
-        modalOverlay->setKnownBestHeight(clientModel->getHeaderHeight());
+        modalOverlay->setKnownBestHeight(clientModel->getHeaderTipHeight(), QDateTime::fromTime_t(clientModel->getHeaderTipTime()));
     } else {
         // Disable possibility to show main window via action
         toggleHideAction->setEnabled(false);
@@ -718,7 +718,10 @@ void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVer
     if (modalOverlay)
     {
         if (header)
-            modalOverlay->setKnownBestHeight(count);
+        {
+            /* use clientmodels getHeaderTipHeight and getHeaderTipTime because the NotifyHeaderTip signal does not fire when updating the best header */
+            modalOverlay->setKnownBestHeight(clientModel->getHeaderTipHeight(), QDateTime::fromTime_t(clientModel->getHeaderTipTime()));
+        }
         else
             modalOverlay->tipUpdate(count, blockDate, nVerificationProgress);
     }

src/qt/clientmodel.cpp

@@ -68,14 +68,22 @@ int ClientModel::getNumBlocks() const
     return chainActive.Height();
 }
 
-int ClientModel::getHeaderHeight() const
+int ClientModel::getHeaderTipHeight() const
 {
     LOCK(cs_main);
     if (!pindexBestHeader)
         return 0;
     return pindexBestHeader->nHeight;
 }
 
+int64_t ClientModel::getHeaderTipTime() const
+{
+    LOCK(cs_main);
+    if (!pindexBestHeader)
+        return 0;
+    return pindexBestHeader->GetBlockTime();
+}
+
 quint64 ClientModel::getTotalBytesRecv() const
 {
     return CNode::GetTotalBytesRecv();

src/qt/clientmodel.h

@@ -51,8 +51,8 @@ class ClientModel : public QObject
     //! Return number of connections, default is in- and outbound (total)
     int getNumConnections(unsigned int flags = CONNECTIONS_ALL) const;
     int getNumBlocks() const;
-    int getHeaderHeight() const;
-
+    int getHeaderTipHeight() const;
+    int64_t getHeaderTipTime() const;
     //! Return number of transactions in the mempool
     long getMempoolSize() const;
     //! Return the dynamic memory usage of the mempool

src/qt/forms/modaloverlay.ui

@@ -82,6 +82,9 @@ QLabel { color: rgb(40,40,40);  }</string>
              </property>
              <item>
               <widget class="QPushButton" name="warningIcon">
+               <property name="enabled">
+                <bool>false</bool>
+               </property>
                <property name="text">
                 <string/>
                </property>

src/qt/modaloverlay.cpp

@@ -63,10 +63,17 @@ bool ModalOverlay::event(QEvent* ev) {
     return QWidget::event(ev);
 }
 
-void ModalOverlay::setKnownBestHeight(int count)
+void ModalOverlay::setKnownBestHeight(int count, const QDateTime& blockDate)
 {
-    if (count > bestBlockHeight)
-        bestBlockHeight = count;
+
+    /* only update the blockheight if the headerschain-tip is not older then 30 days */
+    int64_t now = QDateTime::currentDateTime().toTime_t();
+    int64_t btime = blockDate.toTime_t();
+    if (btime+3600*24*30 > now)
+    {
+        if (count > bestBlockHeight)
+            bestBlockHeight = count;
+    }
 }
 
 void ModalOverlay::tipUpdate(int count, const QDateTime& blockDate, double nVerificationProgress)
@@ -122,6 +129,8 @@ void ModalOverlay::tipUpdate(int count, const QDateTime& blockDate, double nVeri
     // show remaining amount of blocks
     if (bestBlockHeight > 0)
         ui->amountOfBlocksLeft->setText(QString::number(bestBlockHeight-count));
+    else
+        ui->expectedTimeLeft->setText(tr("Unknown. Syncing Headers..."));
 }
 
 void ModalOverlay::showHide(bool hide, bool userRequested)

src/qt/modaloverlay.h

@@ -23,7 +23,7 @@ class ModalOverlay : public QWidget
 
 public Q_SLOTS:
     void tipUpdate(int count, const QDateTime& blockDate, double nVerificationProgress);
-    void setKnownBestHeight(int count);
+    void setKnownBestHeight(int count, const QDateTime& blockDate);
 
     // will show or hide the modal layer
     void showHide(bool hide = false, bool userRequested = false);