Qt/Options: Configure minrelaytxfee using rwconf

src/qt/optionsdialog.cpp

@@ -9,6 +9,7 @@
 #include <qt/optionsdialog.h>
 #include <qt/forms/ui_optionsdialog.h>
 
+#include <qt/bitcoinamountfield.h>
 #include <qt/bitcoinunits.h>
 #include <qt/clientmodel.h>
 #include <qt/guiconstants.h>
@@ -227,6 +228,9 @@ OptionsDialog::OptionsDialog(QWidget* parent, bool enableWallet)
     verticalLayout_Spamfiltering->addWidget(rejectunknownscripts);
     FixTabOrder(rejectunknownscripts);
 
+    minrelaytxfee = new BitcoinAmountField(groupBox_Spamfiltering);
+    CreateOptionUI(verticalLayout_Spamfiltering, minrelaytxfee, tr("Consider transaction fees less than %s per kB relayed to be worthless."));
+
     bytespersigop = new QSpinBox(groupBox_Spamfiltering);
     bytespersigop->setMinimum(1);
     bytespersigop->setMaximum(std::numeric_limits<int>::max());
@@ -540,6 +544,7 @@ void OptionsDialog::setMapper()
     mapper->addMapping(mempoolexpiry, OptionsModel::mempoolexpiry);
 
     mapper->addMapping(rejectunknownscripts, OptionsModel::rejectunknownscripts);
+    mapper->addMapping(minrelaytxfee, OptionsModel::minrelaytxfee);
     mapper->addMapping(bytespersigop, OptionsModel::bytespersigop);
     mapper->addMapping(bytespersigopstrict, OptionsModel::bytespersigopstrict);
     mapper->addMapping(limitancestorcount, OptionsModel::limitancestorcount);

src/qt/optionsdialog.h

@@ -8,6 +8,7 @@
 #include <QDialog>
 #include <QValidator>
 
+class BitcoinAmountField;
 class ClientModel;
 class OptionsModel;
 class QValidatedLineEdit;
@@ -99,6 +100,7 @@ private:
     QSpinBox *mempoolexpiry;
 
     QCheckBox *rejectunknownscripts;
+    BitcoinAmountField *minrelaytxfee;
     QSpinBox *bytespersigop, *bytespersigopstrict;
     QSpinBox *limitancestorcount;
     QSpinBox *limitancestorsize;

src/qt/optionsmodel.cpp

@@ -25,6 +25,7 @@
 #include <outputtype.h>
 #include <policy/settings.h>
 #include <txdb.h>       // for -dbcache defaults
+#include <util/moneystr.h> // for FormatMoney
 #include <util/string.h>
 #include <util/system.h>
 #include <validation.h> // For DEFAULT_SCRIPTCHECK_THREADS
@@ -621,6 +622,8 @@ QVariant OptionsModel::getOption(OptionID option, const std::string& suffix) con
         return qlonglong(std::chrono::duration_cast<std::chrono::hours>(node().mempool().m_expiry).count());
     case rejectunknownscripts:
         return node().mempool().m_require_standard;
+    case minrelaytxfee:
+        return qlonglong(node().mempool().m_min_relay_feerate.GetFeePerK());
     case bytespersigop:
         return nBytesPerSigOp;
     case bytespersigopstrict:
@@ -1023,6 +1026,13 @@ bool OptionsModel::setOption(OptionID option, const QVariant& value, const std::
         }
         break;
     }
+    case minrelaytxfee:
+        if (changed()) {
+            CAmount nNv = value.toLongLong();
+            gArgs.ModifyRWConfigFile("minrelaytxfee", FormatMoney(nNv));
+            node().mempool().m_min_relay_feerate = CFeeRate(nNv);
+        }
+        break;
     case bytespersigop:
         if (changed()) {
             gArgs.ModifyRWConfigFile("bytespersigop", value.toString().toStdString());

src/qt/optionsmodel.h

@@ -85,6 +85,7 @@ public:
         maxmempool,
         mempoolexpiry,
         rejectunknownscripts,   // bool
+        minrelaytxfee,
         bytespersigop,
         bytespersigopstrict,
         limitancestorcount,

src/txmempool.h

@@ -465,7 +465,7 @@ public:
     int64_t m_max_size_bytes;
     std::chrono::seconds m_expiry;
     const CFeeRate m_incremental_relay_feerate;
-    const CFeeRate m_min_relay_feerate;
+    CFeeRate m_min_relay_feerate;
     const CFeeRate m_dust_relay_feerate;
     bool m_permit_bare_multisig;
     std::optional<unsigned> m_max_datacarrier_bytes;