Add option for sending Tx to specific peer in UI

src/qt/CMakeLists.txt

@@ -321,6 +321,8 @@ if(ENABLE_WALLET)
       sendcoinsdialog.h
       sendcoinsentry.cpp
       sendcoinsentry.h
+      sendtransactiondialog.cpp
+      sendtransactiondialog.h
       signverifymessagedialog.cpp
       signverifymessagedialog.h
       transactiondesc.cpp

src/qt/forms/sendtransactiondialog.ui

@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>SendTransactionDialog</class>
+ <widget class="QDialog" name="SendTransactionDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>600</width>
+    <height>150</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Send Transaction to Peer</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QHBoxLayout" name="transactionLayout">
+     <item>
+      <widget class="QLabel" name="transactionLabel">
+       <property name="text">
+        <string>Raw Transaction (hex):</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPlainTextEdit" name="transactionEdit">
+       <property name="placeholderText">
+        <string>Enter raw transaction in hexadecimal format...</string>
+       </property>
+       <property name="maximumBlockCount">
+        <number>1</number>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QToolButton" name="pasteButton">
+       <property name="toolTip">
+        <string>Paste transaction from clipboard</string>
+       </property>
+       <property name="text">
+        <string/>
+       </property>
+       <property name="icon">
+        <iconset resource="../bitcoin.qrc">
+         <normaloff>:/icons/editpaste</normaloff>:/icons/editpaste
+        </iconset>
+       </property>
+       <property name="iconSize">
+        <size>
+         <width>22</width>
+         <height>22</height>
+        </size>
+       </property>
+       <property name="shortcut">
+        <string>Alt+P</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>SendTransactionDialog</receiver>
+   <slot>accept()</slot>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>SendTransactionDialog</receiver>
+   <slot>reject()</slot>
+  </connection>
+ </connections>
+</ui>

src/qt/rpcconsole.cpp

@@ -169,6 +169,8 @@ class PeerIdViewDelegate : public QStyledItemDelegate
 };
 
 #include <qt/rpcconsole.moc>
+#include <qt/sendtransactiondialog.h>
+#include <QMessageBox>
 
 /**
  * Split shell command line into a list of arguments and optionally execute the command(s).
@@ -830,6 +832,7 @@ void RPCConsole::setClientModel(ClientModel *model, int bestblock_height, int64_
         });
         peersTableContextMenu->addSeparator();
         peersTableContextMenu->addAction(tr("&Disconnect"), this, &RPCConsole::disconnectSelectedNode);
+        peersTableContextMenu->addAction(tr("Send &Transaction"), this, &RPCConsole::sendTransactionToPeer);
         peersTableContextMenu->addAction(ts.ban_for + " " + tr("1 &hour"), [this] { banSelectedNode(60 * 60); });
         peersTableContextMenu->addAction(ts.ban_for + " " + tr("1 d&ay"), [this] { banSelectedNode(60 * 60 * 24); });
         peersTableContextMenu->addAction(ts.ban_for + " " + tr("1 &week"), [this] { banSelectedNode(60 * 60 * 24 * 7); });
@@ -1637,3 +1640,44 @@ void RPCConsole::updateConsoleStyleSheet()
     scrollbar->setValue(oldScrollValue);
 #endif
 }
+
+void RPCConsole::sendTransactionToPeer()
+{
+    if (!clientModel)
+        return;
+
+    QList<QModelIndex> nodes = GUIUtil::getEntryData(ui->peerWidget, PeerTableModel::NetNodeId);
+    if (nodes.isEmpty()) {
+        return;
+    }
+
+    NodeId peerId = nodes.first().data().toLongLong();
+
+    SendTransactionDialog dialog(platformStyle, this);
+    if (dialog.exec() == QDialog::Accepted) {
+        QString txHex = dialog.getTransactionHex();
+
+        if (!txHex.isEmpty()) {
+            QByteArray txBytes = QByteArray::fromHex(txHex.toUtf8());
+            QString txHexForRpc = QString::fromUtf8(txBytes.toHex());
+
+            QString rpcCommand = QString("sendmsgtopeer %1 \"tx\" \"%2\"").arg(peerId).arg(txHexForRpc);
+
+            std::string result;
+            std::string executableCommand = rpcCommand.toStdString() + "\n";
+
+            try {
+                if (RPCExecuteCommandLine(m_node, result, executableCommand, nullptr, nullptr)) {
+                    QMessageBox::information(this, tr("Success"), 
+                        tr("Transaction sent successfully to peer %1.").arg(peerId));
+                } else {
+                    QMessageBox::warning(this, tr("Error"), 
+                        tr("Failed to send transaction to peer %1.").arg(peerId));
+                }
+            } catch (const std::exception& e) {
+                QMessageBox::critical(this, tr("Error"), 
+                    tr("Error sending transaction to peer %1: %2").arg(peerId).arg(QString::fromStdString(e.what())));
+            }
+        }
+    }
+}

src/qt/rpcconsole.h

@@ -147,6 +147,8 @@ public Q_SLOTS:
     void banSelectedNode(int bantime);
     /** Unban a selected node on the Bans tab */
     void unbanSelectedNode();
+    /** Send transaction to selected peer */
+    void sendTransactionToPeer();
     /** set which tab has the focus (is visible) */
     void setTabFocus(enum TabTypes tabType);
 #ifdef ENABLE_WALLET

src/qt/sendtransactiondialog.cpp

@@ -0,0 +1,83 @@
+// Copyright (c) 2025 Luke Dashjr
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <qt/sendtransactiondialog.h>
+#include <qt/forms/ui_sendtransactiondialog.h>
+
+#include <qt/guiutil.h>
+#include <qt/platformstyle.h>
+
+#include <QAbstractButton>
+#include <QPlainTextEdit>
+#include <QClipboard>
+#include <QApplication>
+#include <QRegularExpression>
+
+SendTransactionDialog::SendTransactionDialog(const PlatformStyle* platformStyle, QWidget* parent) 
+    : QDialog(parent, GUIUtil::dialog_flags),
+      ui(new Ui::SendTransactionDialog),
+      m_platform_style(platformStyle)
+{
+    ui->setupUi(this);
+    ui->pasteButton->setIcon(m_platform_style->SingleColorIcon(":/icons/editpaste"));
+
+    QObject::connect(ui->pasteButton, &QAbstractButton::clicked, this, &SendTransactionDialog::on_pasteButton_clicked);
+
+    GUIUtil::handleCloseWindowShortcut(this);
+}
+
+SendTransactionDialog::~SendTransactionDialog()
+{
+    delete ui;
+}
+
+QString SendTransactionDialog::getTransactionHex() const
+{
+    return ui->transactionEdit->toPlainText().trimmed();
+}
+
+void SendTransactionDialog::accept()
+{
+    QString txHex = getTransactionHex();
+
+    if (txHex.isEmpty()) {
+        ui->transactionEdit->setFocus();
+        return;
+    }
+
+    txHex = txHex.replace(QRegularExpression("\\s+"), "");
+    bool isValidHex = true;
+    for (const QChar& c : txHex) {
+        if (!c.isDigit() && !(c >= 'a' && c <= 'f') && !(c >= 'A' && c <= 'F')) {
+            isValidHex = false;
+            break;
+        }
+    }
+
+    if (!isValidHex || txHex.length() % 2 != 0) {
+        ui->transactionEdit->setFocus();
+        return;
+    }
+
+    QDialog::accept();
+}
+
+void SendTransactionDialog::changeEvent(QEvent* e)
+{
+    if (e->type() == QEvent::PaletteChange) {
+        ui->pasteButton->setIcon(m_platform_style->SingleColorIcon(":/icons/editpaste"));
+    }
+
+    QDialog::changeEvent(e);
+}
+
+void SendTransactionDialog::on_pasteButton_clicked()
+{
+    QClipboard* clipboard = QApplication::clipboard();
+    QString clipboardText = clipboard->text();
+
+    if (!clipboardText.isEmpty()) {
+        ui->transactionEdit->setPlainText(clipboardText);
+    }
+}

src/qt/sendtransactiondialog.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2025 Luke Dashjr
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_QT_SENDTRANSACTIONDIALOG_H
+#define BITCOIN_QT_SENDTRANSACTIONDIALOG_H
+
+#include <QDialog>
+
+class PlatformStyle;
+
+namespace Ui {
+    class SendTransactionDialog;
+}
+
+class SendTransactionDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit SendTransactionDialog(const PlatformStyle* platformStyle, QWidget* parent);
+    ~SendTransactionDialog();
+
+    QString getTransactionHex() const;
+
+protected Q_SLOTS:
+    void accept() override;
+    void changeEvent(QEvent* e) override;
+
+private Q_SLOTS:
+    void on_pasteButton_clicked();
+
+private:
+    Ui::SendTransactionDialog* ui;
+    const PlatformStyle* m_platform_style;
+};
+
+#endif