qml: add nostr relay config in NetworkOverview and add relay edit dialog

electrum/gui/qml/components/NetworkOverview.qml

@@ -217,6 +217,22 @@ Pane {
                     text: Daemon.currentWallet.lightningNumPeers
                 }
 
+                Heading {
+                    Layout.columnSpan: 2
+                    text: qsTr('Nostr')
+                }
+
+                Label {
+                    text: qsTr('Relays:')
+                    color: Material.accentColor
+                }
+
+                Label {
+                    Layout.fillWidth: true
+                    text: Config.nostrRelays.replace(/,/g, "\n")
+                    wrapMode: Text.Wrap
+                }
+
                 Heading {
                     Layout.columnSpan: 2
                     text: qsTr('Proxy')
@@ -286,6 +302,16 @@ Pane {
                     dialog.open()
                 }
             }
+            FlatButton {
+                Layout.fillWidth: true
+                Layout.preferredWidth: 1
+                text: qsTr('Nostr Settings');
+                icon.source: '../../icons/nostr.png'
+                onClicked: {
+                    var dialog = nostrConfig.createObject(root)
+                    dialog.open()
+                }
+            }
         }
     }
 
@@ -302,4 +328,11 @@ Pane {
             onClosed: destroy()
         }
     }
+
+    Component {
+        id: nostrConfig
+        NostrConfigDialog {
+            onClosed: destroy()
+        }
+    }
 }

electrum/gui/qml/components/NostrConfigDialog.qml

@@ -0,0 +1,118 @@
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+
+import org.electrum 1.0
+
+import "controls"
+
+ElDialog {
+    id: rootItem
+
+    title: qsTr('Nostr relays')
+    iconSource: Qt.resolvedUrl('../../icons/nostr.png')
+
+    width: parent.width
+    height: parent.height
+
+    padding: 0
+
+    property bool valid: true
+
+    function clean_array(text) {
+        var relays = []
+        const fragments = text.split("\n")
+        fragments.forEach(function(fragment) {
+            fragment = fragment.trim()
+            if (fragment != "" && !relays.includes(fragment))
+                relays.push(fragment)
+        })
+        return relays
+    }
+
+    function verify(text) {
+        const re=/^wss?:\/\/([a-zA-Z0-9\-]+\.)+[a-zA-Z]+(\/.*)?$/
+        const relays = clean_array(text)
+        var isvalid = relays.every(function(relay) {
+            return re.test(relay)
+        })
+        return isvalid
+    }
+
+    ColumnLayout {
+        width: parent.width
+        height: parent.height
+        spacing: 0
+
+        ColumnLayout {
+            Layout.fillWidth: true
+            Layout.fillHeight: true
+            Layout.leftMargin: constants.paddingLarge
+            Layout.rightMargin: constants.paddingLarge
+
+            RowLayout {
+                Layout.fillWidth: true
+                TextHighlightPane {
+                    Layout.fillWidth: true
+                    Label {
+                        text: qsTr('Enter the list of Nostr relays')
+                        width: parent.width
+                        wrapMode: Text.Wrap
+                    }
+                }
+                HelpButton {
+                    heading: Config.shortDescFor('NOSTR_RELAYS')
+                    helptext: Config.longDescFor('NOSTR_RELAYS')
+                }
+            }
+
+            RowLayout {
+                Layout.fillWidth: true
+                ElTextArea {
+                    id: relays_ta
+                    Layout.fillWidth: true
+                    Layout.fillHeight: true
+                    font.family: FixedFont
+                    wrapMode: TextEdit.WrapAnywhere
+                    onTextChanged: valid = verify(text)
+                    inputMethodHints: Qt.ImhSensitiveData | Qt.ImhNoPredictiveText | Qt.ImhNoAutoUppercase
+                    background: PaneInsetBackground {
+                        baseColor: constants.darkerDialogBackground
+                    }
+                }
+                ColumnLayout {
+                    Layout.alignment: Qt.AlignTop
+                    ToolButton {
+                        icon.source: '../../icons/paste.png'
+                        icon.height: constants.iconSizeMedium
+                        icon.width: constants.iconSizeMedium
+                        onClicked: {
+                            if (verify(AppController.clipboardToText())) {
+                                if (!relays_ta.text.endsWith('\n'))
+                                    relays_ta.text = relays_ta.text + '\n'
+                                relays_ta.text = relays_ta.text + AppController.clipboardToText()
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        FlatButton {
+            Layout.fillWidth: true
+            text: qsTr('Ok')
+            enabled: valid
+            icon.source: '../../icons/confirmed.png'
+            onClicked: {
+                Config.nostrRelays = clean_array(relays_ta.text).join(",")
+                rootItem.close()
+            }
+        }
+    }
+
+
+    Component.onCompleted: {
+        relays_ta.text = Config.nostrRelays.replace(/,/g, "\n")
+    }
+}

electrum/gui/qml/qeconfig.py

@@ -294,6 +294,17 @@ class QEConfig(AuthMixin, QObject):
             self.config.LIGHTNING_PAYMENT_FEE_MAX_MILLIONTHS = lightningPaymentFeeMaxMillionths
             self.lightningPaymentFeeMaxMillionthsChanged.emit()
 
+    nostrRelaysChanged = pyqtSignal()
+    @pyqtProperty(str, notify=nostrRelaysChanged)
+    def nostrRelays(self):
+        return self.config.NOSTR_RELAYS
+
+    @nostrRelays.setter
+    def nostrRelays(self, nostr_relays):
+        if nostr_relays != self.config.NOSTR_RELAYS:
+            self.config.NOSTR_RELAYS = nostr_relays
+            self.nostrRelaysChanged.emit()
+
     swapServerNPubChanged = pyqtSignal()
     @pyqtProperty(str, notify=swapServerNPubChanged)
     def swapServerNPub(self):