GUI/Options: Configure rejectparasites using settings

Co-authored-by: Luke Dashjr <luke_github1@dashjr.org>

Github-Pull: knots#78
Rebased-From: 78f1ec0f8d

src/qt/optionsdialog.cpp

@@ -267,6 +267,12 @@ OptionsDialog::OptionsDialog(QWidget* parent, bool enableWallet)
     verticalLayout_Spamfiltering->addWidget(rejectunknownscripts);
     FixTabOrder(rejectunknownscripts);
 
+    rejectparasites = new QCheckBox(groupBox_Spamfiltering);
+    rejectparasites->setText(tr("Reject parasite transactions"));
+    rejectparasites->setToolTip(tr("With this option enabled, transactions related to parasitic overlay protocols will be ignored. Parasites are transactions using Bitcoin as a technical infrastructure to animate other protocols, unrelated to ordinary money transfers."));
+    verticalLayout_Spamfiltering->addWidget(rejectparasites);
+    FixTabOrder(rejectparasites);
+
     rejecttokens = new QCheckBox(groupBox_Spamfiltering);
     rejecttokens->setText(tr("Ignore transactions involving non-bitcoin token/asset overlay protocols"));
     rejecttokens->setToolTip(tr("With this option enabled, transactions involving non-bitcoin tokens/assets will not be relayed or mined by your node. Due to not having value, and some technical design flaws, token mints and transfers are often spammy and can bog down the network."));
@@ -707,6 +713,7 @@ void OptionsDialog::setMapper()
     mapper->addMapping(mempoolexpiry, OptionsModel::mempoolexpiry);
 
     mapper->addMapping(rejectunknownscripts, OptionsModel::rejectunknownscripts);
+    mapper->addMapping(rejectparasites, OptionsModel::rejectparasites);
     mapper->addMapping(rejecttokens, OptionsModel::rejecttokens);
     mapper->addMapping(rejectspkreuse, OptionsModel::rejectspkreuse);
     mapper->addMapping(minrelaytxfee, OptionsModel::minrelaytxfee);

src/qt/optionsdialog.h

@@ -109,6 +109,7 @@ private:
     QSpinBox *mempoolexpiry;
 
     QCheckBox *rejectunknownscripts;
+    QCheckBox *rejectparasites;
     QCheckBox *rejecttokens;
     QCheckBox *rejectspkreuse;
     BitcoinAmountField *minrelaytxfee;

src/qt/optionsmodel.cpp

@@ -660,6 +660,8 @@ QVariant OptionsModel::getOption(OptionID option, const std::string& suffix) con
         return qlonglong(std::chrono::duration_cast<std::chrono::hours>(node().mempool().m_opts.expiry).count());
     case rejectunknownscripts:
         return node().mempool().m_opts.require_standard;
+    case rejectparasites:
+        return node().mempool().m_opts.reject_parasites;
     case rejecttokens:
         return node().mempool().m_opts.reject_tokens;
     case rejectspkreuse:
@@ -1117,6 +1119,15 @@ bool OptionsModel::setOption(OptionID option, const QVariant& value, const std::
         }
         break;
     }
+    case rejectparasites:
+    {
+        if (changed()) {
+            const bool nv = value.toBool();
+            node().mempool().m_opts.reject_parasites = nv;
+            node().updateRwSetting("rejectparasites", nv);
+        }
+        break;
+    }
     case rejecttokens:
     {
         if (changed()) {

src/qt/optionsmodel.h

@@ -87,6 +87,7 @@ public:
         incrementalrelayfee,
         mempoolexpiry,
         rejectunknownscripts,   // bool
+        rejectparasites,        // bool
         rejecttokens,           // bool
         rejectspkreuse,         // bool
         minrelaytxfee,