From 5952d8c6147d51e5c22234ae2fddbe7f5a75feb3 Mon Sep 17 00:00:00 2001
From: f321x <f@f321x.com>
Date: Mon, 26 Jan 2026 14:29:58 +0100
Subject: [PATCH] qml: validate server address in ServerConfig

Same as Qt, validate the server address the user enters and prevent the
user from continuing in the wizard or clicking 'Ok' in the ServerConfig
if the entered address is clearly invalid.
---
 .../gui/qml/components/ServerConfigDialog.qml |  1 +
 .../qml/components/controls/ServerConfig.qml  | 26 +++++++++++++++++++
 .../qml/components/wizard/WCServerConfig.qml  |  2 +-
 electrum/gui/qml/qenetwork.py                 |  4 +++
 4 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/electrum/gui/qml/components/ServerConfigDialog.qml b/electrum/gui/qml/components/ServerConfigDialog.qml
index 80cc54a31..9fed62953 100644
--- a/electrum/gui/qml/components/ServerConfigDialog.qml
+++ b/electrum/gui/qml/components/ServerConfigDialog.qml
@@ -39,6 +39,7 @@ ElDialog {
         FlatButton {
             Layout.fillWidth: true
             text: qsTr('Ok')
+            enabled: serverconfig.addressValid
             icon.source: '../../icons/confirmed.png'
             onClicked: {
                 let auto_connect = serverconfig.serverConnectMode == ServerConnectModeComboBox.Mode.Autoconnect
diff --git a/electrum/gui/qml/components/controls/ServerConfig.qml b/electrum/gui/qml/components/controls/ServerConfig.qml
index 47bd4e680..aae493bae 100644
--- a/electrum/gui/qml/components/controls/ServerConfig.qml
+++ b/electrum/gui/qml/components/controls/ServerConfig.qml
@@ -12,6 +12,7 @@ Item {
     property bool showAutoselectServer: true
     property alias address: address_tf.text
     property alias serverConnectMode: server_connect_mode_cb.currentValue
+    property alias addressValid: address_tf.valid
 
     implicitHeight: rootLayout.height
 
@@ -28,6 +29,11 @@ Item {
 
             ServerConnectModeComboBox {
                 id: server_connect_mode_cb
+                onCurrentValueChanged: {
+                    if (currentValue == ServerConnectModeComboBox.Mode.Autoconnect) {
+                        address_tf.text = ""
+                    }
+                }
             }
 
             Item {
@@ -63,6 +69,26 @@ Item {
                 enabled: server_connect_mode_cb.currentValue != ServerConnectModeComboBox.Mode.Autoconnect
                 width: parent.width
                 inputMethodHints: Qt.ImhNoPredictiveText
+
+                property bool valid: true
+
+                function validate() {
+                    if (!enabled) {
+                        valid = true
+                        return
+                    }
+                    valid = Network.isValidServerAddress(address_tf.text)
+                }
+
+                onTextChanged: validate()
+                onEnabledChanged: validate()
+
+                Rectangle {
+                    anchors.fill: parent
+                    color: "red"
+                    opacity: 0.2
+                    visible: !parent.valid
+                }
             }
         }
 
diff --git a/electrum/gui/qml/components/wizard/WCServerConfig.qml b/electrum/gui/qml/components/wizard/WCServerConfig.qml
index bc784d1b6..b0ab17082 100644
--- a/electrum/gui/qml/components/wizard/WCServerConfig.qml
+++ b/electrum/gui/qml/components/wizard/WCServerConfig.qml
@@ -5,7 +5,7 @@ import QtQuick.Controls
 import "../controls"
 
 WizardComponent {
-    valid: true
+    valid: sc.addressValid
     last: true
     title: qsTr('Server')
 
diff --git a/electrum/gui/qml/qenetwork.py b/electrum/gui/qml/qenetwork.py
index b25712d13..fa088822d 100644
--- a/electrum/gui/qml/qenetwork.py
+++ b/electrum/gui/qml/qenetwork.py
@@ -206,6 +206,10 @@ class QENetwork(QObject, QtEventListener):
     def server(self):
         return self._server
 
+    @pyqtSlot(str, result=bool)
+    def isValidServerAddress(self, server: str) -> bool:
+        return ServerAddr.from_str_with_inference(server) is not None
+
     @pyqtSlot(str, bool, bool)
     def setServerParameters(self, server_str: str, auto_connect: bool, one_server: bool):
         net_params = self.network.get_parameters()