qt/kivy: lightning_tx_dialog: show LN invoice

electrum/gui/kivy/main.kv

@@ -157,7 +157,8 @@
     touched: False
     padding: '10dp', '10dp'
     background_color: .3, .3, .3, 1
-    touch_callback: lambda: app.on_ref_label(self)
+    show_text_with_qr: True
+    touch_callback: lambda: app.on_ref_label(self, show_text_with_qr=self.show_text_with_qr)
     on_touch_down:
         touch = args[1]
         touched = bool(self.collide_point(*touch.pos))

electrum/gui/kivy/main_window.py

@@ -1018,10 +1018,10 @@ class ElectrumWindow(App, Logger):
         self._orientation = 'landscape' if width > height else 'portrait'
         self._ui_mode = 'tablet' if min(width, height) > inch(3.51) else 'phone'
 
-    def on_ref_label(self, label):
+    def on_ref_label(self, label, *, show_text_with_qr: bool = True):
         if not label.data:
             return
-        self.qr_dialog(label.name, label.data, True)
+        self.qr_dialog(label.name, label.data, show_text_with_qr)
 
     def show_error(self, error, width='200dp', pos=None, arrow_pos=None,
                    exit=False, icon=f'atlas://{KIVY_GUI_PATH}/theming/light/error', duration=0,

electrum/gui/kivy/uix/dialogs/lightning_tx_dialog.py

@@ -13,6 +13,7 @@ from kivy.uix.dropdown import DropDown
 from kivy.uix.button import Button
 
 from electrum.gui.kivy.i18n import _
+from electrum.invoices import LNInvoice
 
 
 if TYPE_CHECKING:
@@ -31,6 +32,7 @@ Builder.load_string('''
     date_str: ''
     payment_hash: ''
     description: ''
+    invoice: ''
     BoxLayout:
         orientation: 'vertical'
         ScrollView:
@@ -69,6 +71,13 @@ Builder.load_string('''
                 TxHashLabel:
                     data: root.preimage
                     name: _('Preimage')
+                TopLabel:
+                    text: _('Lightning Invoice')
+                RefLabel:
+                    data: root.invoice
+                    text: root.invoice[:40] + "..."
+                    name: _('Lightning Invoice')
+                    show_text_with_qr: False
 
         Widget:
             size_hint: 1, 0.1
@@ -109,3 +118,10 @@ class LightningTxDialog(Factory.Popup):
         self.amount_str = format_amount(-self.amount if self.is_sent else self.amount)
         if tx_item.get('fee_msat'):
             self.fee_str = format_amount(Decimal(tx_item['fee_msat']) / 1000)
+        invoice = (self.app.wallet.get_invoice(self.payment_hash)
+                   or self.app.wallet.get_request(self.payment_hash))
+        if invoice:
+            assert isinstance(invoice, LNInvoice), f"{self.invoice!r}"
+            self.invoice = invoice.invoice
+        else:
+            self.invoice = ''

electrum/gui/qt/lightning_tx_dialog.py

@@ -31,7 +31,10 @@ from PyQt5.QtGui import QFont
 from PyQt5.QtWidgets import QVBoxLayout, QLabel, QGridLayout
 
 from electrum.i18n import _
+from electrum.invoices import LNInvoice
+
 from .util import WindowModalDialog, ButtonsLineEdit, ColorScheme, Buttons, CloseButton, MONOSPACE_FONT
+from .qrtextedit import ShowQRTextEdit
 
 if TYPE_CHECKING:
     from .main_window import ElectrumWindow
@@ -49,6 +52,14 @@ class LightningTxDialog(WindowModalDialog):
         self.amount = Decimal(tx_item['amount_msat']) / 1000
         self.payment_hash = tx_item['payment_hash']
         self.preimage = tx_item['preimage']
+        invoice = (self.parent.wallet.get_invoice(self.payment_hash)
+                   or self.parent.wallet.get_request(self.payment_hash))
+        if invoice:
+            assert isinstance(invoice, LNInvoice), f"{self.invoice!r}"
+            self.invoice = invoice.invoice
+        else:
+            self.invoice = ''
+
         self.setMinimumWidth(700)
         vbox = QVBoxLayout()
         self.setLayout(vbox)
@@ -83,6 +94,12 @@ class LightningTxDialog(WindowModalDialog):
         self.preimage_e.setFont(QFont(MONOSPACE_FONT))
         vbox.addWidget(self.preimage_e)
 
+        vbox.addWidget(QLabel(_("Lightning Invoice") + ":"))
+        self.invoice_e = ShowQRTextEdit(self.invoice, config=parent.config)
+        self.invoice_e.setMaximumHeight(150)
+        self.invoice_e.addCopyButton(self.parent.app)
+        vbox.addWidget(self.invoice_e)
+
         vbox.addLayout(Buttons(CloseButton(self)))
 
     def show_qr(self, line_edit, title=''):