Qt/Options: Configure blockmintxfee using rwconf

src/qt/optionsdialog.cpp

@@ -320,6 +320,9 @@ OptionsDialog::OptionsDialog(QWidget* parent, bool enableWallet)
 
     verticalLayout_Mining->addWidget(new QLabel(tr("<strong>Note that mining is heavily influenced by the settings on the Mempool tab.</strong>")));
 
+    blockmintxfee = new BitcoinAmountField(tabMining);
+    CreateOptionUI(verticalLayout_Mining, blockmintxfee, tr("Only mine transactions paying a fee of at least %s per kvB."));
+
     blockmaxsize = new QSpinBox(tabMining);
     blockmaxsize->setMinimum(1);
     blockmaxsize->setMaximum((MAX_BLOCK_SERIALIZED_SIZE - 1000) / 1000);
@@ -604,6 +607,7 @@ void OptionsDialog::setMapper()
 
     /* Mining tab */
 
+    mapper->addMapping(blockmintxfee, OptionsModel::blockmintxfee);
     mapper->addMapping(blockmaxsize, OptionsModel::blockmaxsize);
     mapper->addMapping(blockprioritysize, OptionsModel::blockprioritysize);
     mapper->addMapping(blockmaxweight, OptionsModel::blockmaxweight);

src/qt/optionsdialog.h

@@ -116,6 +116,7 @@ private:
     QSpinBox *datacarriersize;
     BitcoinAmountField *dustrelayfee;
 
+    BitcoinAmountField *blockmintxfee;
     QSpinBox *blockmaxsize, *blockprioritysize, *blockmaxweight;
 };
 

src/qt/optionsmodel.cpp

@@ -673,6 +673,12 @@ QVariant OptionsModel::getOption(OptionID option, const std::string& suffix) con
         return qlonglong(node().mempool().m_opts.max_datacarrier_bytes.value_or(0));
     case dustrelayfee:
         return qlonglong(node().mempool().m_opts.dust_relay_feerate_floor.GetFeePerK());
+    case blockmintxfee:
+        if (gArgs.IsArgSet("-blockmintxfee")) {
+            return qlonglong(ParseMoney(gArgs.GetArg("-blockmintxfee", "")).value_or(0));
+        } else {
+            return qlonglong(DEFAULT_BLOCK_MIN_TX_FEE);
+        }
     case blockmaxsize:
         return qlonglong(gArgs.GetIntArg("-blockmaxsize", DEFAULT_BLOCK_MAX_SIZE) / 1000);
     case blockprioritysize:
@@ -1179,6 +1185,13 @@ bool OptionsModel::setOption(OptionID option, const QVariant& value, const std::
             }
         }
         break;
+    case blockmintxfee:
+        if (changed()) {
+            std::string strNv = FormatMoney(value.toLongLong());
+            gArgs.ForceSetArg("-blockmintxfee", strNv);
+            gArgs.ModifyRWConfigFile("blockmintxfee", strNv);
+        }
+        break;
     case blockmaxsize:
     case blockprioritysize:
     case blockmaxweight:

src/qt/optionsmodel.h

@@ -97,6 +97,7 @@ public:
         rejectbaremultisig,     // bool
         datacarriersize,
         dustrelayfee,
+        blockmintxfee,
         blockmaxsize,
         blockprioritysize,
         blockmaxweight,