diff --git a/src/interface/node.cpp b/src/interface/node.cpp
index 4e3fa6ceb9..877c5f57a8 100644
--- a/src/interface/node.cpp
+++ b/src/interface/node.cpp
@@ -7,6 +7,9 @@
 #include <chainparams.h>
 #include <init.h>
 #include <interface/handler.h>
+#include <net.h>
+#include <netaddress.h>
+#include <netbase.h>
 #include <scheduler.h>
 #include <ui_interface.h>
 #include <util.h>
@@ -24,6 +27,8 @@ class NodeImpl : public Node
         gArgs.ParseParameters(argc, argv);
     }
     void readConfigFile(const std::string& conf_path) override { gArgs.ReadConfigFile(conf_path); }
+    bool softSetArg(const std::string& arg, const std::string& value) override { return gArgs.SoftSetArg(arg, value); }
+    bool softSetBoolArg(const std::string& arg, bool value) override { return gArgs.SoftSetBoolArg(arg, value); }
     void selectParams(const std::string& network) override { SelectParams(network); }
     void initLogging() override { InitLogging(); }
     void initParameterInteraction() override { InitParameterInteraction(); }
@@ -40,6 +45,16 @@ class NodeImpl : public Node
         Shutdown();
     }
     void startShutdown() override { StartShutdown(); }
+    void mapPort(bool use_upnp) override
+    {
+        if (use_upnp) {
+            StartMapPort();
+        } else {
+            InterruptMapPort();
+            StopMapPort();
+        }
+    }
+    bool getProxy(Network net, proxyType& proxy_info) override { return GetProxy(net, proxy_info); }
     std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) override
     {
         return MakeHandler(::uiInterface.InitMessage.connect(fn));
diff --git a/src/interface/node.h b/src/interface/node.h
index b69ef160a3..368bade28b 100644
--- a/src/interface/node.h
+++ b/src/interface/node.h
@@ -5,10 +5,14 @@
 #ifndef BITCOIN_INTERFACE_NODE_H
 #define BITCOIN_INTERFACE_NODE_H
 
+#include <netaddress.h> // For Network
+
 #include <functional>
 #include <memory>
 #include <string>
 
+class proxyType;
+
 namespace interface {
 
 class Handler;
@@ -22,6 +26,12 @@ public:
     //! Set command line arguments.
     virtual void parseParameters(int argc, const char* const argv[]) = 0;
 
+    //! Set a command line argument if it doesn't already have a value
+    virtual bool softSetArg(const std::string& arg, const std::string& value) = 0;
+
+    //! Set a command line boolean argument if it doesn't already have a value
+    virtual bool softSetBoolArg(const std::string& arg, bool value) = 0;
+
     //! Load settings from configuration file.
     virtual void readConfigFile(const std::string& conf_path) = 0;
 
@@ -49,6 +59,12 @@ public:
     //! Start shutdown.
     virtual void startShutdown() = 0;
 
+    //! Map port.
+    virtual void mapPort(bool use_upnp) = 0;
+
+    //! Get proxy.
+    virtual bool getProxy(Network net, proxyType& proxy_info) = 0;
+
     //! Register handler for init messages.
     using InitMessageFn = std::function<void(const std::string& message)>;
     virtual std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) = 0;
diff --git a/src/qt/addressbookpage.cpp b/src/qt/addressbookpage.cpp
index b5764ed263..f96de33033 100644
--- a/src/qt/addressbookpage.cpp
+++ b/src/qt/addressbookpage.cpp
@@ -241,9 +241,7 @@ void AddressBookPage::on_showAddressQRCode_clicked()
 
     QString strAddress = entries.at(0).data(Qt::EditRole).toString();
     QRDialog* dialog = new QRDialog(this);
-    OptionsModel *model = new OptionsModel(nullptr, false);
 
-    dialog->setModel(model);
     dialog->setAttribute(Qt::WA_DeleteOnClose);
     dialog->setInfo(tr("QR code"), "dash:"+strAddress, "", strAddress);
     dialog->show();
diff --git a/src/qt/dash.cpp b/src/qt/dash.cpp
index b7f61b9186..1fc259a0ee 100644
--- a/src/qt/dash.cpp
+++ b/src/qt/dash.cpp
@@ -353,7 +353,7 @@ void BitcoinApplication::createPaymentServer()
 
 void BitcoinApplication::createOptionsModel(bool resetSettings)
 {
-    optionsModel = new OptionsModel(nullptr, resetSettings);
+    optionsModel = new OptionsModel(m_node, nullptr, resetSettings);
 }
 
 void BitcoinApplication::createWindow(const NetworkStyle *networkStyle)
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index b28a640535..e1954e9b59 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -12,16 +12,13 @@
 #include <qt/bitcoinunits.h>
 #include <qt/guiutil.h>
 
-#include <init.h>
+#include <interface/node.h>
 #include <validation.h> // For DEFAULT_SCRIPTCHECK_THREADS
 #include <net.h>
 #include <netbase.h>
 #include <txdb.h> // for -dbcache defaults
 
 #ifdef ENABLE_WALLET
-#include <wallet/wallet.h>
-#include <wallet/walletdb.h>
-
 #include <privatesend/privatesend-client.h>
 #endif
 
@@ -33,8 +30,8 @@ const char *DEFAULT_GUI_PROXY_HOST = "127.0.0.1";
 
 static const QString GetDefaultProxyAddress();
 
-OptionsModel::OptionsModel(QObject *parent, bool resetSettings) :
-    QAbstractListModel(parent)
+OptionsModel::OptionsModel(interface::Node& node, QObject *parent, bool resetSettings) :
+    QAbstractListModel(parent), m_node(node)
 {
     Init(resetSettings);
 }
@@ -91,17 +88,17 @@ void OptionsModel::Init(bool resetSettings)
 
     if (!settings.contains("fontScale"))
         settings.setValue("fontScale", GUIUtil::getFontScaleDefault());
-    if (!gArgs.SoftSetArg("-font-scale", settings.value("fontScale").toString().toStdString()))
+    if (!m_node.softSetArg("-font-scale", settings.value("fontScale").toString().toStdString()))
         addOverriddenOption("-font-scale");
 
     if (!settings.contains("fontWeightNormal"))
         settings.setValue("fontWeightNormal", GUIUtil::weightToArg(GUIUtil::getFontWeightNormalDefault()));
-    if (!gArgs.SoftSetArg("-font-weight-normal", settings.value("fontWeightNormal").toString().toStdString()))
+    if (!m_node.softSetArg("-font-weight-normal", settings.value("fontWeightNormal").toString().toStdString()))
         addOverriddenOption("-font-weight-normal");
 
     if (!settings.contains("fontWeightBold"))
         settings.setValue("fontWeightBold", GUIUtil::weightToArg(GUIUtil::getFontWeightBoldDefault()));
-    if (!gArgs.SoftSetArg("-font-weight-bold", settings.value("fontWeightBold").toString().toStdString()))
+    if (!m_node.softSetArg("-font-weight-bold", settings.value("fontWeightBold").toString().toStdString()))
         addOverriddenOption("-font-weight-bold");
 
 #ifdef ENABLE_WALLET
@@ -136,31 +133,31 @@ void OptionsModel::Init(bool resetSettings)
     //
     // If setting doesn't exist create it with defaults.
     //
-    // If gArgs.SoftSetArg() or gArgs.SoftSetBoolArg() return false we were overridden
+    // If m_node.softSetArg() or m_node.softSetBoolArg() return false we were overridden
     // by command-line and show this in the UI.
 
     // Main
     if (!settings.contains("nDatabaseCache"))
         settings.setValue("nDatabaseCache", (qint64)nDefaultDbCache);
-    if (!gArgs.SoftSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
+    if (!m_node.softSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
         addOverriddenOption("-dbcache");
 
     if (!settings.contains("nThreadsScriptVerif"))
         settings.setValue("nThreadsScriptVerif", DEFAULT_SCRIPTCHECK_THREADS);
-    if (!gArgs.SoftSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
+    if (!m_node.softSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
         addOverriddenOption("-par");
 
     // Wallet
 #ifdef ENABLE_WALLET
     if (!settings.contains("bSpendZeroConfChange"))
         settings.setValue("bSpendZeroConfChange", true);
-    if (!gArgs.SoftSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))
+    if (!m_node.softSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))
         addOverriddenOption("-spendzeroconfchange");
 
     // PrivateSend
     if (!settings.contains("nPrivateSendRounds"))
         settings.setValue("nPrivateSendRounds", DEFAULT_PRIVATESEND_ROUNDS);
-    if (!gArgs.SoftSetArg("-privatesendrounds", settings.value("nPrivateSendRounds").toString().toStdString()))
+    if (!m_node.softSetArg("-privatesendrounds", settings.value("nPrivateSendRounds").toString().toStdString()))
         addOverriddenOption("-privatesendrounds");
     CPrivateSendClientOptions::SetRounds(settings.value("nPrivateSendRounds").toInt());
 
@@ -171,13 +168,13 @@ void OptionsModel::Init(bool resetSettings)
         else
             settings.setValue("nPrivateSendAmount", settings.value("nAnonymizeDashAmount").toInt());
     }
-    if (!gArgs.SoftSetArg("-privatesendamount", settings.value("nPrivateSendAmount").toString().toStdString()))
+    if (!m_node.softSetArg("-privatesendamount", settings.value("nPrivateSendAmount").toString().toStdString()))
         addOverriddenOption("-privatesendamount");
     CPrivateSendClientOptions::SetAmount(settings.value("nPrivateSendAmount").toInt());
 
     if (!settings.contains("fPrivateSendMultiSession"))
         settings.setValue("fPrivateSendMultiSession", DEFAULT_PRIVATESEND_MULTISESSION);
-    if (!gArgs.SoftSetBoolArg("-privatesendmultisession", settings.value("fPrivateSendMultiSession").toBool()))
+    if (!m_node.softSetBoolArg("-privatesendmultisession", settings.value("fPrivateSendMultiSession").toBool()))
         addOverriddenOption("-privatesendmultisession");
     CPrivateSendClientOptions::SetMultiSessionEnabled(settings.value("fPrivateSendMultiSession").toBool());
 #endif
@@ -185,12 +182,12 @@ void OptionsModel::Init(bool resetSettings)
     // Network
     if (!settings.contains("fUseUPnP"))
         settings.setValue("fUseUPnP", DEFAULT_UPNP);
-    if (!gArgs.SoftSetBoolArg("-upnp", settings.value("fUseUPnP").toBool()))
+    if (!m_node.softSetBoolArg("-upnp", settings.value("fUseUPnP").toBool()))
         addOverriddenOption("-upnp");
 
     if (!settings.contains("fListen"))
         settings.setValue("fListen", DEFAULT_LISTEN);
-    if (!gArgs.SoftSetBoolArg("-listen", settings.value("fListen").toBool()))
+    if (!m_node.softSetBoolArg("-listen", settings.value("fListen").toBool()))
         addOverriddenOption("-listen");
 
     if (!settings.contains("fUseProxy"))
@@ -198,7 +195,7 @@ void OptionsModel::Init(bool resetSettings)
     if (!settings.contains("addrProxy"))
         settings.setValue("addrProxy", GetDefaultProxyAddress());
     // Only try to set -proxy, if user has enabled fUseProxy
-    if (settings.value("fUseProxy").toBool() && !gArgs.SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
+    if (settings.value("fUseProxy").toBool() && !m_node.softSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
         addOverriddenOption("-proxy");
     else if(!settings.value("fUseProxy").toBool() && !gArgs.GetArg("-proxy", "").empty())
         addOverriddenOption("-proxy");
@@ -208,7 +205,7 @@ void OptionsModel::Init(bool resetSettings)
     if (!settings.contains("addrSeparateProxyTor"))
         settings.setValue("addrSeparateProxyTor", GetDefaultProxyAddress());
     // Only try to set -onion, if user has enabled fUseSeparateProxyTor
-    if (settings.value("fUseSeparateProxyTor").toBool() && !gArgs.SoftSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
+    if (settings.value("fUseSeparateProxyTor").toBool() && !m_node.softSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
         addOverriddenOption("-onion");
     else if(!settings.value("fUseSeparateProxyTor").toBool() && !gArgs.GetArg("-onion", "").empty())
         addOverriddenOption("-onion");
@@ -216,7 +213,7 @@ void OptionsModel::Init(bool resetSettings)
     // Display
     if (!settings.contains("language"))
         settings.setValue("language", "");
-    if (!gArgs.SoftSetArg("-lang", settings.value("language").toString().toStdString()))
+    if (!m_node.softSetArg("-lang", settings.value("language").toString().toStdString()))
         addOverriddenOption("-lang");
 
     language = settings.value("language").toString();
@@ -418,12 +415,7 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
             break;
         case MapPortUPnP: // core option - can be changed on-the-fly
             settings.setValue("fUseUPnP", value.toBool());
-            if (value.toBool()) {
-                StartMapPort();
-            } else {
-                InterruptMapPort();
-                StopMapPort();
-            }
+            m_node.mapPort(value.toBool());
             break;
         case MinimizeOnClose:
             fMinimizeOnClose = value.toBool();
@@ -642,7 +634,7 @@ bool OptionsModel::getProxySettings(QNetworkProxy& proxy) const
     // Directly query current base proxy, because
     // GUI settings can be overridden with -proxy.
     proxyType curProxy;
-    if (GetProxy(NET_IPV4, curProxy)) {
+    if (m_node.getProxy(NET_IPV4, curProxy)) {
         proxy.setType(QNetworkProxy::Socks5Proxy);
         proxy.setHostName(QString::fromStdString(curProxy.proxy.ToStringIP()));
         proxy.setPort(curProxy.proxy.GetPort());
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index 27bd7fc32c..30629611af 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -9,6 +9,10 @@
 
 #include <QAbstractListModel>
 
+namespace interface {
+class Node;
+}
+
 QT_BEGIN_NAMESPACE
 class QNetworkProxy;
 QT_END_NAMESPACE
@@ -27,7 +31,7 @@ class OptionsModel : public QAbstractListModel
     Q_OBJECT
 
 public:
-    explicit OptionsModel(QObject *parent = 0, bool resetSettings = false);
+    explicit OptionsModel(interface::Node& node, QObject *parent = 0, bool resetSettings = false);
 
     enum OptionID {
         StartAtStartup,         // bool
@@ -93,6 +97,7 @@ public:
     bool resetSettingsOnShutdown{false};
 
 private:
+    interface::Node& m_node;
     /* Qt-only settings */
     bool fHideTrayIcon;
     bool fMinimizeToTray;
diff --git a/src/qt/qrdialog.cpp b/src/qt/qrdialog.cpp
index badfc9ed79..ab913db782 100644
--- a/src/qt/qrdialog.cpp
+++ b/src/qt/qrdialog.cpp
@@ -8,7 +8,6 @@
 #include <qt/bitcoinunits.h>
 #include <qt/guiconstants.h>
 #include <qt/guiutil.h>
-#include <qt/optionsmodel.h>
 
 #include <QClipboard>
 #include <QDrag>
@@ -91,8 +90,7 @@ void QRGeneralImageWidget::contextMenuEvent(QContextMenuEvent *event)
 
 QRDialog::QRDialog(QWidget *parent) :
     QDialog(parent),
-    ui(new Ui::QRDialog),
-    model(0)
+    ui(new Ui::QRDialog)
 {
     ui->setupUi(this);
 
@@ -113,17 +111,6 @@ QRDialog::~QRDialog()
     delete ui;
 }
 
-void QRDialog::setModel(OptionsModel *model)
-{
-    this->model = model;
-
-    if (model)
-        connect(model, SIGNAL(displayUnitChanged(int)), this, SLOT(update()));
-
-    // update the display unit if necessary
-    update();
-}
-
 void QRDialog::setInfo(QString strWindowtitle, QString strQRCode, QString strTextInfo, QString strQRCodeTitle)
 {
     this->strWindowtitle = strWindowtitle;
@@ -135,9 +122,6 @@ void QRDialog::setInfo(QString strWindowtitle, QString strQRCode, QString strTex
 
 void QRDialog::update()
 {
-    if(!model)
-        return;
-
     setWindowTitle(strWindowtitle);
     ui->button_saveImage->setEnabled(false);
     if (strTextInfo.isEmpty()) {
@@ -183,4 +167,4 @@ void QRDialog::update()
         ui->button_saveImage->setEnabled(true);
     }
 #endif
-}
\ No newline at end of file
+}
diff --git a/src/qt/qrdialog.h b/src/qt/qrdialog.h
index 7174f2a551..46d9cbcb1a 100644
--- a/src/qt/qrdialog.h
+++ b/src/qt/qrdialog.h
@@ -11,8 +11,6 @@
 #include <QImage>
 #include <QLabel>
 
-class OptionsModel;
-
 namespace Ui {
     class QRDialog;
 }
@@ -52,7 +50,6 @@ public:
     explicit QRDialog(QWidget *parent = 0);
     ~QRDialog();
 
-    void setModel(OptionsModel *model);
     void setInfo(QString strWindowtitle, QString strQRCode, QString strTextInfo, QString strQRCodeTitle);
 
 private Q_SLOTS:
@@ -60,7 +57,6 @@ private Q_SLOTS:
 
 private:
     Ui::QRDialog *ui;
-    OptionsModel *model;
     QString strWindowtitle;
     QString strQRCode;
     QString strTextInfo;
diff --git a/src/qt/test/paymentservertests.cpp b/src/qt/test/paymentservertests.cpp
index 1864604372..286c368fed 100644
--- a/src/qt/test/paymentservertests.cpp
+++ b/src/qt/test/paymentservertests.cpp
@@ -8,6 +8,7 @@
 #include <qt/test/paymentrequestdata.h>
 
 #include <amount.h>
+#include <interface/node.h>
 #include <random.h>
 #include <script/script.h>
 #include <script/standard.h>
@@ -65,7 +66,8 @@ static SendCoinsRecipient handleRequest(PaymentServer* server, std::vector<unsig
 void PaymentServerTests::paymentServerTests()
 {
     SelectParams(CBaseChainParams::MAIN);
-    OptionsModel optionsModel;
+    auto node = interface::MakeNode();
+    OptionsModel optionsModel(*node);
     PaymentServer* server = new PaymentServer(nullptr, false);
     X509_STORE* caStore = X509_STORE_new();
     X509_STORE_add_cert(caStore, parse_b64der_cert(caCert1_BASE64));
diff --git a/src/qt/test/wallettests.cpp b/src/qt/test/wallettests.cpp
index 04fe78a3b7..9437d849ea 100644
--- a/src/qt/test/wallettests.cpp
+++ b/src/qt/test/wallettests.cpp
@@ -1,5 +1,6 @@
 #include <qt/test/wallettests.h>
 
+#include <interface/node.h>
 #include <qt/bitcoinamountfield.h>
 #include <qt/callback.h>
 #include <qt/optionsmodel.h>
@@ -134,7 +135,8 @@ void TestGUI()
     // Create widgets for sending coins and listing transactions.
     SendCoinsDialog sendCoinsDialog;
     TransactionView transactionView;
-    OptionsModel optionsModel;
+    auto node = interface::MakeNode();
+    OptionsModel optionsModel(*node);
     WalletModel walletModel(&wallet, &optionsModel);
     sendCoinsDialog.setModel(&walletModel);
     transactionView.setModel(&walletModel);
diff --git a/src/qt/transactionview.cpp b/src/qt/transactionview.cpp
index 0bfa017612..c34c22ee28 100644
--- a/src/qt/transactionview.cpp
+++ b/src/qt/transactionview.cpp
@@ -540,9 +540,7 @@ void TransactionView::showAddressQRCode()
 
     QString strAddress = entries.at(0).data(TransactionTableModel::AddressRole).toString();
     QRDialog* dialog = new QRDialog(this);
-    OptionsModel *model = new OptionsModel(nullptr, false);
 
-    dialog->setModel(model);
     dialog->setAttribute(Qt::WA_DeleteOnClose);
     dialog->setInfo(tr("QR code"), "dash:"+strAddress, "", strAddress);
     dialog->show();