Qt/Options: Configure permitbaremultisig using rwconf

src/qt/optionsdialog.cpp

@@ -255,6 +255,12 @@ OptionsDialog::OptionsDialog(QWidget* parent, bool enableWallet)
     limitdescendantsize->setMaximum(std::numeric_limits<int>::max());
     CreateOptionUI(verticalLayout_Spamfiltering, limitdescendantsize, tr("Ignore transactions if any ancestor would have more than %s kilobytes of unconfirmed descendants."));
 
+    rejectbaremultisig = new QCheckBox(groupBox_Spamfiltering);
+    rejectbaremultisig->setText(tr("Ignore bare/exposed \"multisig\" scripts"));
+    rejectbaremultisig->setToolTip(tr("Spam is sometimes disguised to appear as if it is an old-style N-of-M multi-party transaction, where most of the keys are really bogus. At the same time, legitimate multi-party transactions typically have always used P2SH format (which is not filtered by this option), which is more secure."));
+    verticalLayout_Spamfiltering->addWidget(rejectbaremultisig);
+    FixTabOrder(rejectbaremultisig);
+
     verticalLayout_Mempool->addWidget(groupBox_Spamfiltering);
 
     verticalLayout_Mempool->addItem(new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding));
@@ -504,6 +510,7 @@ void OptionsDialog::setMapper()
     mapper->addMapping(limitancestorsize, OptionsModel::limitancestorsize);
     mapper->addMapping(limitdescendantcount, OptionsModel::limitdescendantcount);
     mapper->addMapping(limitdescendantsize, OptionsModel::limitdescendantsize);
+    mapper->addMapping(rejectbaremultisig, OptionsModel::rejectbaremultisig);
 
     /* Window */
 #ifndef Q_OS_MACOS

src/qt/optionsdialog.h

@@ -100,6 +100,7 @@ private:
     QSpinBox *limitancestorsize;
     QSpinBox *limitdescendantcount;
     QSpinBox *limitdescendantsize;
+    QCheckBox *rejectbaremultisig;
 };
 
 #endif // BITCOIN_QT_OPTIONSDIALOG_H

src/qt/optionsmodel.cpp

@@ -633,6 +633,8 @@ QVariant OptionsModel::getOption(OptionID option, const std::string& suffix) con
         return qlonglong(node().mempool().m_limits.descendant_count);
     case limitdescendantsize:
         return qlonglong(node().mempool().m_limits.descendant_size_vbytes / 1'000);
+    case rejectbaremultisig:
+        return !node().mempool().m_permit_bare_multisig;
     default:
         return QVariant();
     }
@@ -1061,6 +1063,14 @@ bool OptionsModel::setOption(OptionID option, const QVariant& value, const std::
             gArgs.ModifyRWConfigFile("limitdescendantsize", strNv);
         }
         break;
+    case rejectbaremultisig:
+        if (changed()) {
+            // The config and internal option is inverted
+            const bool fNewValue = ! value.toBool();
+            node().mempool().m_permit_bare_multisig = fNewValue;
+            gArgs.ModifyRWConfigFile("permitbaremultisig", strprintf("%d", fNewValue));
+        }
+        break;
     default:
         break;
     }

src/qt/optionsmodel.h

@@ -91,6 +91,7 @@ public:
         limitancestorsize,
         limitdescendantcount,
         limitdescendantsize,
+        rejectbaremultisig,     // bool
         OptionIDRowCount,
     };
 

src/txmempool.h

@@ -467,7 +467,7 @@ public:
     const CFeeRate m_incremental_relay_feerate;
     const CFeeRate m_min_relay_feerate;
     const CFeeRate m_dust_relay_feerate;
-    const bool m_permit_bare_multisig;
+    bool m_permit_bare_multisig;
     const std::optional<unsigned> m_max_datacarrier_bytes;
     bool m_datacarrier_fullcount;
     bool m_require_standard;