Qt/Options: Configure mempoolexpiry using rwconf

src/qt/optionsdialog.cpp

@@ -214,6 +214,11 @@ OptionsDialog::OptionsDialog(QWidget* parent, bool enableWallet)
     maxmempool->setMaximum(std::numeric_limits<int>::max());
     CreateOptionUI(verticalLayout_Mempool, maxmempool, tr("Keep the transaction memory pool below %s MB"));
 
+    mempoolexpiry = new QSpinBox(tabMempool);
+    mempoolexpiry->setMinimum(1);
+    mempoolexpiry->setMaximum(std::numeric_limits<int>::max());
+    CreateOptionUI(verticalLayout_Mempool, mempoolexpiry, tr("Do not keep transactions in memory more than %s hours"));
+
     QGroupBox * const groupBox_Spamfiltering = new QGroupBox(tabMempool);
     groupBox_Spamfiltering->setTitle(tr("Spam filtering"));
     QVBoxLayout * const verticalLayout_Spamfiltering = new QVBoxLayout(groupBox_Spamfiltering);
@@ -468,6 +473,7 @@ void OptionsDialog::setMapper()
 
     mapper->addMapping(maxorphantx, OptionsModel::maxorphantx);
     mapper->addMapping(maxmempool, OptionsModel::maxmempool);
+    mapper->addMapping(mempoolexpiry, OptionsModel::mempoolexpiry);
 
     /* Window */
 #ifndef Q_OS_MACOS

src/qt/optionsdialog.h

@@ -91,6 +91,7 @@ private:
     QValueComboBox *mempoolreplacement;
     QSpinBox *maxorphantx;
     QSpinBox *maxmempool;
+    QSpinBox *mempoolexpiry;
 };
 
 #endif // BITCOIN_QT_OPTIONSDIALOG_H

src/qt/optionsmodel.cpp

@@ -14,7 +14,7 @@
 #include <common/args.h>
 #include <index/blockfilterindex.h>
 #include <interfaces/node.h>
-#include <kernel/mempool_options.h> // for DEFAULT_MAX_MEMPOOL_SIZE_MB
+#include <kernel/mempool_options.h> // for DEFAULT_MAX_MEMPOOL_SIZE_MB, DEFAULT_MEMPOOL_EXPIRY_HOURS
 #include <mapport.h>
 #include <net.h>
 #include <net_processing.h>
@@ -32,6 +32,7 @@
 #include <interfaces/wallet.h>
 #endif
 
+#include <chrono>
 #include <string>
 #include <unordered_set>
 
@@ -640,6 +641,8 @@ QVariant OptionsModel::getOption(OptionID option, const std::string& suffix) con
         return qlonglong(gArgs.GetIntArg("-maxorphantx", DEFAULT_MAX_ORPHAN_TRANSACTIONS));
     case maxmempool:
         return qlonglong(node().mempool().m_opts.max_size_bytes / 1'000'000);
+    case mempoolexpiry:
+        return qlonglong(std::chrono::duration_cast<std::chrono::hours>(node().mempool().m_opts.expiry).count());
     default:
         return QVariant();
     }
@@ -992,6 +995,25 @@ bool OptionsModel::setOption(OptionID option, const QVariant& value, const std::
         }
         break;
     }
+    case mempoolexpiry:
+    {
+        if (changed()) {
+            const auto old_value = node().mempool().m_opts.expiry;
+            const std::chrono::hours new_value{value.toLongLong()};
+            std::string strNv = value.toString().toStdString();
+            node().mempool().m_opts.expiry = new_value;
+            gArgs.ForceSetArg("-mempoolexpiry", strNv);
+            gArgs.ModifyRWConfigFile("mempoolexpiry", strNv);
+            if (new_value < old_value) {
+                LOCK(cs_main);
+                auto node_ctx = node().context();
+                assert(node_ctx && node_ctx->mempool && node_ctx->chainman);
+                auto& active_chainstate = node_ctx->chainman->ActiveChainstate();
+                LimitMempoolSize(*node_ctx->mempool, active_chainstate.CoinsTip());
+            }
+        }
+        break;
+    }
     default:
         break;
     }

src/qt/optionsmodel.h

@@ -83,6 +83,7 @@ public:
         mempoolreplacement,
         maxorphantx,
         maxmempool,
+        mempoolexpiry,
         OptionIDRowCount,
     };