20 files changed, 231 insertions, 103 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index 477b1300bc..8fc7f61d4b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -156,6 +156,7 @@ BITCOIN_CORE_H = \
   netbase.h \
   netmessagemaker.h \
   node/coin.h \
+  node/coinstats.h \
   node/psbt.h \
   node/transaction.h \
   noui.h \
@@ -278,6 +279,7 @@ libbitcoin_server_a_SOURCES = \
   net.cpp \
   net_processing.cpp \
   node/coin.cpp \
+  node/coinstats.cpp \
   node/psbt.cpp \
   node/transaction.cpp \
   noui.cpp \
diff --git a/src/init.cpp b/src/init.cpp
index dd43ef71c9..042335b8e7 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -438,9 +438,17 @@ void SetupServerArgs()
 #else
     hidden_args.emplace_back("-upnp");
 #endif
-    gArgs.AddArg("-whitebind=<addr>", "Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6", ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
-    gArgs.AddArg("-whitelist=<IP address or network>", "Whitelist peers connecting from the given IP address (e.g. 1.2.3.4) or CIDR notated network (e.g. 1.2.3.0/24). Can be specified multiple times."
-        " Whitelisted peers cannot be DoS banned", ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
+    gArgs.AddArg("-whitebind=<[permissions@]addr>", "Bind to given address and whitelist peers connecting to it. "
+        "Use [host]:port notation for IPv6. Allowed permissions are bloomfilter (allow requesting BIP37 filtered blocks and transactions), "
+        "noban (do not ban for misbehavior), "
+        "forcerelay (relay even non-standard transactions), "
+        "relay (relay even in -blocksonly mode), "
+        "and mempool (allow requesting BIP35 mempool contents). "
+        "Specify multiple permissions separated by commas (default: noban,mempool,relay). Can be specified multiple times.", ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
+
+    gArgs.AddArg("-whitelist=<[permissions@]IP address or network>", "Whitelist peers connecting from the given IP address (e.g. 1.2.3.4) or "
+        "CIDR notated network(e.g. 1.2.3.0/24). Uses same permissions as "
+        "-whitebind. Can be specified multiple times." , ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
 
     g_wallet_init_interface.AddWalletOptions();
 
@@ -510,8 +518,8 @@ void SetupServerArgs()
     gArgs.AddArg("-datacarriersize", strprintf("Maximum size of data in data carrier transactions we relay and mine (default: %u)", MAX_OP_RETURN_RELAY), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
     gArgs.AddArg("-minrelaytxfee=<amt>", strprintf("Fees (in %s/kB) smaller than this are considered zero fee for relaying, mining and transaction creation (default: %s)",
         CURRENCY_UNIT, FormatMoney(DEFAULT_MIN_RELAY_TX_FEE)), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
-    gArgs.AddArg("-whitelistforcerelay", strprintf("Force relay of transactions from whitelisted inbound peers even if the transactions were already in the mempool or violate local relay policy (default: %d)", DEFAULT_WHITELISTFORCERELAY), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
-    gArgs.AddArg("-whitelistrelay", strprintf("Accept relayed transactions received from whitelisted inbound peers even when not relaying transactions (default: %d)", DEFAULT_WHITELISTRELAY), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
+    gArgs.AddArg("-whitelistforcerelay", strprintf("Add 'forcerelay' permission to whitelisted inbound peers with default permissions. This will relay transactions even if the transactions were already in the mempool or violate local relay policy. (default: %d)", DEFAULT_WHITELISTFORCERELAY), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
+    gArgs.AddArg("-whitelistrelay", strprintf("Add 'relay' permission to whitelisted inbound peers with default permissions. The will accept relayed transactions even when not relaying transactions (default: %d)", DEFAULT_WHITELISTRELAY), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
 
 
     gArgs.AddArg("-blockmaxweight=<n>", strprintf("Set maximum BIP141 block weight (default: %d)", DEFAULT_BLOCK_MAX_WEIGHT), ArgsManager::ALLOW_ANY, OptionsCategory::BLOCK_CREATION);
diff --git a/src/node/coinstats.cpp b/src/node/coinstats.cpp
new file mode 100644
index 0000000000..e1891b9898
--- /dev/null
+++ b/src/node/coinstats.cpp
@@ -0,0 +1,77 @@
+// Copyright (c) 2010 Satoshi Nakamoto
+// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <node/coinstats.h>
+
+#include <amount.h>
+#include <coins.h>
+#include <chain.h>
+#include <hash.h>
+#include <serialize.h>
+#include <validation.h>
+#include <uint256.h>
+#include <util/system.h>
+
+#include <map>
+
+#include <boost/thread.hpp>
+
+
+static void ApplyStats(CCoinsStats &stats, CHashWriter& ss, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
+{
+    assert(!outputs.empty());
+    ss << hash;
+    ss << VARINT(outputs.begin()->second.nHeight * 2 + outputs.begin()->second.fCoinBase ? 1u : 0u);
+    stats.nTransactions++;
+    for (const auto& output : outputs) {
+        ss << VARINT(output.first + 1);
+        ss << output.second.out.scriptPubKey;
+        ss << VARINT(output.second.out.nValue, VarIntMode::NONNEGATIVE_SIGNED);
+        stats.nTransactionOutputs++;
+        stats.nTotalAmount += output.second.out.nValue;
+        stats.nBogoSize += 32 /* txid */ + 4 /* vout index */ + 4 /* height + coinbase */ + 8 /* amount */ +
+                           2 /* scriptPubKey len */ + output.second.out.scriptPubKey.size() /* scriptPubKey */;
+    }
+    ss << VARINT(0u);
+}
+
+//! Calculate statistics about the unspent transaction output set
+bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)
+{
+    std::unique_ptr<CCoinsViewCursor> pcursor(view->Cursor());
+    assert(pcursor);
+
+    CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
+    stats.hashBlock = pcursor->GetBestBlock();
+    {
+        LOCK(cs_main);
+        stats.nHeight = LookupBlockIndex(stats.hashBlock)->nHeight;
+    }
+    ss << stats.hashBlock;
+    uint256 prevkey;
+    std::map<uint32_t, Coin> outputs;
+    while (pcursor->Valid()) {
+        boost::this_thread::interruption_point();
+        COutPoint key;
+        Coin coin;
+        if (pcursor->GetKey(key) && pcursor->GetValue(coin)) {
+            if (!outputs.empty() && key.hash != prevkey) {
+                ApplyStats(stats, ss, prevkey, outputs);
+                outputs.clear();
+            }
+            prevkey = key.hash;
+            outputs[key.n] = std::move(coin);
+        } else {
+            return error("%s: unable to read value", __func__);
+        }
+        pcursor->Next();
+    }
+    if (!outputs.empty()) {
+        ApplyStats(stats, ss, prevkey, outputs);
+    }
+    stats.hashSerialized = ss.GetHash();
+    stats.nDiskSize = view->EstimateSize();
+    return true;
+}
diff --git a/src/node/coinstats.h b/src/node/coinstats.h
new file mode 100644
index 0000000000..7c11aab8bd
--- /dev/null
+++ b/src/node/coinstats.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2010 Satoshi Nakamoto
+// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_NODE_COINSTATS_H
+#define BITCOIN_NODE_COINSTATS_H
+
+#include <amount.h>
+#include <uint256.h>
+
+#include <cstdint>
+
+class CCoinsView;
+
+struct CCoinsStats
+{
+    int nHeight;
+    uint256 hashBlock;
+    uint64_t nTransactions;
+    uint64_t nTransactionOutputs;
+    uint64_t nBogoSize;
+    uint256 hashSerialized;
+    uint64_t nDiskSize;
+    CAmount nTotalAmount;
+
+    CCoinsStats() : nHeight(0), nTransactions(0), nTransactionOutputs(0), nBogoSize(0), nDiskSize(0), nTotalAmount(0) {}
+};
+
+//! Calculate statistics about the unspent transaction output set
+bool GetUTXOStats(CCoinsView* view, CCoinsStats& stats);
+
+#endif // BITCOIN_NODE_COINSTATS_H
diff --git a/src/qt/bitcoinamountfield.cpp b/src/qt/bitcoinamountfield.cpp
index 5854ade655..9fa49b87fa 100644
--- a/src/qt/bitcoinamountfield.cpp
+++ b/src/qt/bitcoinamountfield.cpp
@@ -6,6 +6,7 @@
 
 #include <qt/bitcoinunits.h>
 #include <qt/guiconstants.h>
+#include <qt/guiutil.h>
 #include <qt/qvaluecombobox.h>
 
 #include <QApplication>
@@ -121,7 +122,7 @@ public:
 
             const QFontMetrics fm(fontMetrics());
             int h = lineEdit()->minimumSizeHint().height();
-            int w = fm.width(BitcoinUnits::format(BitcoinUnits::BTC, BitcoinUnits::maxMoney(), false, BitcoinUnits::separatorAlways));
+            int w = GUIUtil::TextWidth(fm, BitcoinUnits::format(BitcoinUnits::BTC, BitcoinUnits::maxMoney(), false, BitcoinUnits::separatorAlways));
             w += 2; // cursor blinking space
 
             QStyleOptionSpinBox opt;
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index bc9af9793e..323797a4b6 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -40,7 +40,6 @@
 #include <QApplication>
 #include <QComboBox>
 #include <QDateTime>
-#include <QDesktopWidget>
 #include <QDragEnterEvent>
 #include <QListWidget>
 #include <QMenu>
@@ -48,6 +47,7 @@
 #include <QMessageBox>
 #include <QMimeData>
 #include <QProgressDialog>
+#include <QScreen>
 #include <QSettings>
 #include <QShortcut>
 #include <QStackedWidget>
@@ -81,7 +81,7 @@ BitcoinGUI::BitcoinGUI(interfaces::Node& node, const PlatformStyle *_platformSty
     QSettings settings;
     if (!restoreGeometry(settings.value("MainWindowGeometry").toByteArray())) {
         // Restore failed (perhaps missing setting), center the window
-        move(QApplication::desktop()->availableGeometry().center() - frameGeometry().center());
+        move(QGuiApplication::primaryScreen()->availableGeometry().center() - frameGeometry().center());
     }
 
 #ifdef ENABLE_WALLET
@@ -1407,7 +1407,7 @@ UnitDisplayStatusBarControl::UnitDisplayStatusBarControl(const PlatformStyle *pl
     const QFontMetrics fm(font());
     for (const BitcoinUnits::Unit unit : units)
     {
-        max_width = qMax(max_width, fm.width(BitcoinUnits::longName(unit)));
+        max_width = qMax(max_width, GUIUtil::TextWidth(fm, BitcoinUnits::longName(unit)));
     }
     setMinimumSize(max_width, 0);
     setAlignment(Qt::AlignRight | Qt::AlignVCenter);
diff --git a/src/qt/forms/debugwindow.ui b/src/qt/forms/debugwindow.ui
index 6e52c5e477..be807b20c0 100644
--- a/src/qt/forms/debugwindow.ui
+++ b/src/qt/forms/debugwindow.ui
@@ -15,6 +15,25 @@
   </property>
   <layout class="QVBoxLayout" name="verticalLayout_2">
    <item>
+    <widget class="QLabel" name="label_alerts">
+     <property name="visible">
+      <bool>false</bool>
+     </property>
+     <property name="styleSheet">
+      <string notr="true">QLabel { background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 0, stop:0 #F0D0A0, stop:1 #F8D488); color:#000000; }</string>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
+     <property name="margin">
+      <number>3</number>
+     </property>
+     <property name="textInteractionFlags">
+      <set>Qt::TextSelectableByMouse</set>
+     </property>
+    </widget>
+   </item>
+   <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
       <number>0</number>
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index dc1da7f8a9..bbe6e9bf87 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -39,7 +39,6 @@
 #include <QClipboard>
 #include <QDateTime>
 #include <QDesktopServices>
-#include <QDesktopWidget>
 #include <QDoubleValidator>
 #include <QFileDialog>
 #include <QFont>
@@ -916,7 +915,7 @@ qreal calculateIdealFontSize(int width, const QString& text, QFont font, qreal m
     while(font_size >= minPointSize) {
         font.setPointSizeF(font_size);
         QFontMetrics fm(font);
-        if (fm.width(text) < width) {
+        if (TextWidth(fm, text) < width) {
             break;
         }
         font_size -= 0.5;
@@ -956,4 +955,13 @@ void PolishProgressDialog(QProgressDialog* dialog)
 #endif
 }
 
+int TextWidth(const QFontMetrics& fm, const QString& text)
+{
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
+    return fm.horizontalAdvance(text);
+#else
+    return fm.width(text);
+#endif
+}
+
 } // namespace GUIUtil
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index bea4a83494..9db92f94d7 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -257,6 +257,14 @@ namespace GUIUtil
 
     // Fix known bugs in QProgressDialog class.
     void PolishProgressDialog(QProgressDialog* dialog);
+
+    /**
+     * Returns the distance in pixels appropriate for drawing a subsequent character after text.
+     *
+     * In Qt 5.12 and before the QFontMetrics::width() is used and it is deprecated since Qt 13.0.
+     * In Qt 5.11 the QFontMetrics::horizontalAdvance() was introduced.
+     */
+    int TextWidth(const QFontMetrics& fm, const QString& text);
 } // namespace GUIUtil
 
 #endif // BITCOIN_QT_GUIUTIL_H
diff --git a/src/qt/overviewpage.cpp b/src/qt/overviewpage.cpp
index d8e48f350a..07ffff0126 100644
--- a/src/qt/overviewpage.cpp
+++ b/src/qt/overviewpage.cpp
@@ -204,9 +204,8 @@ void OverviewPage::updateWatchOnlyLabels(bool showWatchOnly)
 void OverviewPage::setClientModel(ClientModel *model)
 {
     this->clientModel = model;
-    if(model)
-    {
-        // Show warning if this is a prerelease version
+    if (model) {
+        // Show warning, for example if this is a prerelease version
         connect(model, &ClientModel::alertsChanged, this, &OverviewPage::updateAlerts);
         updateAlerts(model->getStatusBarWarnings());
     }
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index f3f5d28af9..0bb87742e9 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -41,8 +41,8 @@
 #include <QNetworkReply>
 #include <QNetworkRequest>
 #include <QSslCertificate>
+#include <QSslConfiguration>
 #include <QSslError>
-#include <QSslSocket>
 #include <QStringList>
 #include <QTextDocument>
 #include <QUrlQuery>
@@ -448,9 +448,9 @@ void PaymentServer::LoadRootCAs(X509_STORE* _store)
 
         certList = QSslCertificate::fromPath(certFile);
         // Use those certificates when fetching payment requests, too:
-        QSslSocket::setDefaultCaCertificates(certList);
+        QSslConfiguration::defaultConfiguration().setCaCertificates(certList);
     } else
-        certList = QSslSocket::systemCaCertificates();
+        certList = QSslConfiguration::systemCaCertificates();
 
     int nRootCerts = 0;
     const QDateTime currentTime = QDateTime::currentDateTime();
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 91c836ac19..eccc34e12f 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -28,11 +28,11 @@
 #include <wallet/wallet.h>
 #endif
 
-#include <QDesktopWidget>
 #include <QKeyEvent>
 #include <QMenu>
 #include <QMessageBox>
 #include <QScrollBar>
+#include <QScreen>
 #include <QSettings>
 #include <QTime>
 #include <QTimer>
@@ -450,7 +450,7 @@ RPCConsole::RPCConsole(interfaces::Node& node, const PlatformStyle *_platformSty
     QSettings settings;
     if (!restoreGeometry(settings.value("RPCConsoleWindowGeometry").toByteArray())) {
         // Restore failed (perhaps missing setting), center the window
-        move(QApplication::desktop()->availableGeometry().center() - frameGeometry().center());
+        move(QGuiApplication::primaryScreen()->availableGeometry().center() - frameGeometry().center());
     }
 
     QChar nonbreaking_hyphen(8209);
@@ -557,6 +557,17 @@ bool RPCConsole::eventFilter(QObject* obj, QEvent *event)
 void RPCConsole::setClientModel(ClientModel *model)
 {
     clientModel = model;
+
+    bool wallet_enabled{false};
+#ifdef ENABLE_WALLET
+    wallet_enabled = WalletModel::isWalletEnabled();
+#endif // ENABLE_WALLET
+    if (model && !wallet_enabled) {
+        // Show warning, for example if this is a prerelease version
+        connect(model, &ClientModel::alertsChanged, this, &RPCConsole::updateAlerts);
+        updateAlerts(model->getStatusBarWarnings());
+    }
+
     ui->trafficGraph->setClientModel(model);
     if (model && clientModel->getPeerTableModel() && clientModel->getBanTableModel()) {
         // Keep up to date with client
@@ -1264,3 +1275,9 @@ QString RPCConsole::tabTitle(TabTypes tab_type) const
 {
     return ui->tabWidget->tabText(tab_type);
 }
+
+void RPCConsole::updateAlerts(const QString& warnings)
+{
+    this->ui->label_alerts->setVisible(!warnings.isEmpty());
+    this->ui->label_alerts->setText(warnings);
+}
diff --git a/src/qt/rpcconsole.h b/src/qt/rpcconsole.h
index 38015e38fd..3f7a74ba03 100644
--- a/src/qt/rpcconsole.h
+++ b/src/qt/rpcconsole.h
@@ -167,6 +167,9 @@ private:
 
     /** Update UI with latest network info from model. */
     void updateNetworkState();
+
+private Q_SLOTS:
+    void updateAlerts(const QString& warnings);
 };
 
 #endif // BITCOIN_QT_RPCCONSOLE_H
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 0ed057bc8b..f23c47736f 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -704,7 +704,7 @@ void SendCoinsDialog::updateSmartFeeLabel()
         int lightness = ui->fallbackFeeWarningLabel->palette().color(QPalette::WindowText).lightness();
         QColor warning_colour(255 - (lightness / 5), 176 - (lightness / 3), 48 - (lightness / 14));
         ui->fallbackFeeWarningLabel->setStyleSheet("QLabel { color: " + warning_colour.name() + "; }");
-        ui->fallbackFeeWarningLabel->setIndent(QFontMetrics(ui->fallbackFeeWarningLabel->font()).width("x"));
+        ui->fallbackFeeWarningLabel->setIndent(GUIUtil::TextWidth(QFontMetrics(ui->fallbackFeeWarningLabel->font()), "x"));
     }
     else
     {
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
index 5bceb1f945..0e5abb89f3 100644
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -8,12 +8,12 @@
 
 #include <qt/splashscreen.h>
 
-#include <qt/networkstyle.h>
-
 #include <clientversion.h>
 #include <interfaces/handler.h>
 #include <interfaces/node.h>
 #include <interfaces/wallet.h>
+#include <qt/guiutil.h>
+#include <qt/networkstyle.h>
 #include <ui_interface.h>
 #include <util/system.h>
 #include <util/translation.h>
@@ -21,9 +21,9 @@
 
 #include <QApplication>
 #include <QCloseEvent>
-#include <QDesktopWidget>
 #include <QPainter>
 #include <QRadialGradient>
+#include <QScreen>
 
 
 SplashScreen::SplashScreen(interfaces::Node& node, Qt::WindowFlags f, const NetworkStyle *networkStyle) :
@@ -75,21 +75,21 @@ SplashScreen::SplashScreen(interfaces::Node& node, Qt::WindowFlags f, const Netw
     // check font size and drawing with
     pixPaint.setFont(QFont(font, 33*fontFactor));
     QFontMetrics fm = pixPaint.fontMetrics();
-    int titleTextWidth = fm.width(titleText);
+    int titleTextWidth = GUIUtil::TextWidth(fm, titleText);
     if (titleTextWidth > 176) {
         fontFactor = fontFactor * 176 / titleTextWidth;
     }
 
     pixPaint.setFont(QFont(font, 33*fontFactor));
     fm = pixPaint.fontMetrics();
-    titleTextWidth  = fm.width(titleText);
+    titleTextWidth  = GUIUtil::TextWidth(fm, titleText);
     pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight,paddingTop,titleText);
 
     pixPaint.setFont(QFont(font, 15*fontFactor));
 
     // if the version string is too long, reduce size
     fm = pixPaint.fontMetrics();
-    int versionTextWidth  = fm.width(versionText);
+    int versionTextWidth  = GUIUtil::TextWidth(fm, versionText);
     if(versionTextWidth > titleTextWidth+paddingRight-10) {
         pixPaint.setFont(QFont(font, 10*fontFactor));
         titleVersionVSpace -= 5;
@@ -111,7 +111,7 @@ SplashScreen::SplashScreen(interfaces::Node& node, Qt::WindowFlags f, const Netw
         boldFont.setWeight(QFont::Bold);
         pixPaint.setFont(boldFont);
         fm = pixPaint.fontMetrics();
-        int titleAddTextWidth  = fm.width(titleAddText);
+        int titleAddTextWidth  = GUIUtil::TextWidth(fm, titleAddText);
         pixPaint.drawText(pixmap.width()/devicePixelRatio-titleAddTextWidth-10,15,titleAddText);
     }
 
@@ -124,7 +124,7 @@ SplashScreen::SplashScreen(interfaces::Node& node, Qt::WindowFlags f, const Netw
     QRect r(QPoint(), QSize(pixmap.size().width()/devicePixelRatio,pixmap.size().height()/devicePixelRatio));
     resize(r.size());
     setFixedSize(r.size());
-    move(QApplication::desktop()->screenGeometry().center() - r.center());
+    move(QGuiApplication::primaryScreen()->geometry().center() - r.center());
 
     subscribeToCoreSignals();
     installEventFilter(this);
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index a74003149d..7161c39ffd 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -10,6 +10,7 @@
 #include <chain.h>
 #include <chainparams.h>
 #include <coins.h>
+#include <node/coinstats.h>
 #include <consensus/validation.h>
 #include <core_io.h>
 #include <hash.h>
@@ -909,77 +910,6 @@ static UniValue getblock(const JSONRPCRequest& request)
     return blockToJSON(block, tip, pblockindex, verbosity >= 2);
 }
 
-struct CCoinsStats
-{
-    int nHeight;
-    uint256 hashBlock;
-    uint64_t nTransactions;
-    uint64_t nTransactionOutputs;
-    uint64_t nBogoSize;
-    uint256 hashSerialized;
-    uint64_t nDiskSize;
-    CAmount nTotalAmount;
-
-    CCoinsStats() : nHeight(0), nTransactions(0), nTransactionOutputs(0), nBogoSize(0), nDiskSize(0), nTotalAmount(0) {}
-};
-
-static void ApplyStats(CCoinsStats &stats, CHashWriter& ss, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
-{
-    assert(!outputs.empty());
-    ss << hash;
-    ss << VARINT(outputs.begin()->second.nHeight * 2 + outputs.begin()->second.fCoinBase ? 1u : 0u);
-    stats.nTransactions++;
-    for (const auto& output : outputs) {
-        ss << VARINT(output.first + 1);
-        ss << output.second.out.scriptPubKey;
-        ss << VARINT(output.second.out.nValue, VarIntMode::NONNEGATIVE_SIGNED);
-        stats.nTransactionOutputs++;
-        stats.nTotalAmount += output.second.out.nValue;
-        stats.nBogoSize += 32 /* txid */ + 4 /* vout index */ + 4 /* height + coinbase */ + 8 /* amount */ +
-                           2 /* scriptPubKey len */ + output.second.out.scriptPubKey.size() /* scriptPubKey */;
-    }
-    ss << VARINT(0u);
-}
-
-//! Calculate statistics about the unspent transaction output set
-static bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)
-{
-    std::unique_ptr<CCoinsViewCursor> pcursor(view->Cursor());
-    assert(pcursor);
-
-    CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
-    stats.hashBlock = pcursor->GetBestBlock();
-    {
-        LOCK(cs_main);
-        stats.nHeight = LookupBlockIndex(stats.hashBlock)->nHeight;
-    }
-    ss << stats.hashBlock;
-    uint256 prevkey;
-    std::map<uint32_t, Coin> outputs;
-    while (pcursor->Valid()) {
-        boost::this_thread::interruption_point();
-        COutPoint key;
-        Coin coin;
-        if (pcursor->GetKey(key) && pcursor->GetValue(coin)) {
-            if (!outputs.empty() && key.hash != prevkey) {
-                ApplyStats(stats, ss, prevkey, outputs);
-                outputs.clear();
-            }
-            prevkey = key.hash;
-            outputs[key.n] = std::move(coin);
-        } else {
-            return error("%s: unable to read value", __func__);
-        }
-        pcursor->Next();
-    }
-    if (!outputs.empty()) {
-        ApplyStats(stats, ss, prevkey, outputs);
-    }
-    stats.hashSerialized = ss.GetHash();
-    stats.nDiskSize = view->EstimateSize();
-    return true;
-}
-
 static UniValue pruneblockchain(const JSONRPCRequest& request)
 {
             RPCHelpMan{"pruneblockchain", "",
diff --git a/src/serialize.h b/src/serialize.h
index 1dc27d84eb..a38d76fc18 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -555,6 +555,7 @@ template<typename Stream, unsigned int N, typename T> inline void Unserialize(St
  * vectors of unsigned char are a special case and are intended to be serialized as a single opaque blob.
  */
 template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, const unsigned char&);
+template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, const bool&);
 template<typename Stream, typename T, typename A, typename V> void Serialize_impl(Stream& os, const std::vector<T, A>& v, const V&);
 template<typename Stream, typename T, typename A> inline void Serialize(Stream& os, const std::vector<T, A>& v);
 template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, const unsigned char&);
@@ -713,6 +714,18 @@ void Serialize_impl(Stream& os, const std::vector<T, A>& v, const unsigned char&
         os.write((char*)v.data(), v.size() * sizeof(T));
 }
 
+template<typename Stream, typename T, typename A>
+void Serialize_impl(Stream& os, const std::vector<T, A>& v, const bool&)
+{
+    // A special case for std::vector<bool>, as dereferencing
+    // std::vector<bool>::const_iterator does not result in a const bool&
+    // due to std::vector's special casing for bool arguments.
+    WriteCompactSize(os, v.size());
+    for (bool elem : v) {
+        ::Serialize(os, elem);
+    }
+}
+
 template<typename Stream, typename T, typename A, typename V>
 void Serialize_impl(Stream& os, const std::vector<T, A>& v, const V&)
 {
diff --git a/src/test/README.md b/src/test/README.md
index 0017e3de26..8901fae7bd 100644
--- a/src/test/README.md
+++ b/src/test/README.md
@@ -49,7 +49,3 @@ unit tests.  The file naming convention is `<source_filename>_tests.cpp`
 and such files should wrap their tests in a test suite
 called `<source_filename>_tests`. For an example of this pattern,
 examine `uint256_tests.cpp`.
-
-For further reading, I found the following website to be helpful in
-explaining how the boost unit test framework works:
-[http://www.alittlemadness.com/2009/03/31/c-unit-testing-with-boosttest/](http://archive.is/dRBGf).
diff --git a/src/test/serialize_tests.cpp b/src/test/serialize_tests.cpp
index 8a8620938e..b90be15fba 100644
--- a/src/test/serialize_tests.cpp
+++ b/src/test/serialize_tests.cpp
@@ -258,6 +258,14 @@ static bool isCanonicalException(const std::ios_base::failure& ex)
     return strcmp(expectedException.what(), ex.what()) == 0;
 }
 
+BOOST_AUTO_TEST_CASE(vector_bool)
+{
+    std::vector<uint8_t> vec1{1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1};
+    std::vector<bool> vec2{1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1};
+
+    BOOST_CHECK(vec1 == std::vector<uint8_t>(vec2.begin(), vec2.end()));
+    BOOST_CHECK(SerializeHash(vec1) == SerializeHash(vec2));
+}
 
 BOOST_AUTO_TEST_CASE(noncanonical)
 {
diff --git a/src/validation.cpp b/src/validation.cpp
index 74f68a3047..cd19d7666f 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -3401,6 +3401,12 @@ bool ProcessNewBlockHeaders(const std::vector<CBlockHeader>& headers, CValidatio
         }
     }
     NotifyHeaderTip();
+    {
+        LOCK(cs_main);
+        if (::ChainstateActive().IsInitialBlockDownload() && ppindex && *ppindex) {
+            LogPrintf("Synchronizing blockheaders, height: %d (~%.2f%%)\n", (*ppindex)->nHeight, 100.0/((*ppindex)->nHeight+(GetAdjustedTime() - (*ppindex)->GetBlockTime()) / Params().GetConsensus().nPowTargetSpacing) * (*ppindex)->nHeight);
+        }
+    }
     return true;
 }