during wallet restore allow user to retry after invalid OTP. add abort button on kivy.

gui/kivy/main_window.py

@@ -503,7 +503,7 @@ class ElectrumWindow(App):
             else:
                 self.load_wallet(wallet)
         else:
-            Logger.debug('Electrum: Wallet not found. Launching install wizard')
+            Logger.debug('Electrum: Wallet not found or action needed. Launching install wizard')
             storage = WalletStorage(path, manual_upgrades=True)
             wizard = Factory.InstallWizard(self.electrum_config, self.plugins, storage)
             wizard.bind(on_wizard_complete=self.on_wizard_complete)

gui/kivy/uix/dialogs/installwizard.py

@@ -1,6 +1,7 @@
 
 from functools import partial
 import threading
+import os
 
 from kivy.app import App
 from kivy.clock import Clock
@@ -238,11 +239,23 @@ Builder.load_string('''
         text: root.message2
     BoxLayout:
         orientation: 'horizontal'
-        size_hint: 1, 0.2
+        size_hint: 1, 0.3
         Widget
         CheckBox:
             id:cb
             on_state: Clock.schedule_once(root.on_cb)
+    Widget
+        size_hint: 1, 1
+        height: '48sp'
+    BoxLayout:
+        orientation: 'horizontal'
+        WizardButton:
+            id: abort
+            text: _('Abort creation')
+            on_release: root.abort_wallet_creation()
+            size_hint: 1, None
+        Widget
+            size_hint: 1, None
 
 <WizardNewOTPDialog>
     message : ''
@@ -618,6 +631,12 @@ class WizardKnownOTPDialog(WizardOTPDialogBase):
         self.ids.otp.text = ''
         self.ids.next.disabled = not self.ids.cb.active
 
+    def abort_wallet_creation(self):
+        self._on_release = True
+        os.unlink(self.wizard.storage.path)
+        self.wizard.terminate()
+        self.dismiss()
+
 
 class WizardNewOTPDialog(WizardOTPDialogBase):
 

plugins/trustedcoin/trustedcoin.py

@@ -581,9 +581,18 @@ class TrustedCoinPlugin(BasePlugin):
     def do_auth(self, wizard, short_id, otp, xpub3):
         try:
             server.auth(short_id, otp)
+        except TrustedCoinException as e:
+            if e.status_code == 400:  # invalid OTP
+                wizard.show_message(_('Invalid one-time password.'))
+                # ask again for otp
+                self.request_otp_dialog(wizard, short_id, None, xpub3)
+            else:
+                wizard.show_message(str(e))
+                wizard.terminate()
         except Exception as e:
             wizard.show_message(str(e))
-            return
+            wizard.terminate()
+        else:
             k3 = keystore.from_xpub(xpub3)
             wizard.storage.put('x3/', k3.dump())
             wizard.storage.put('use_trustedcoin', True)