require PIN to delete file

gui/kivy/main_window.py

@@ -779,6 +779,19 @@ class ElectrumWindow(App):
         else:
             apply(f, args + (None,))
 
+    def delete_wallet(self, name):
+        basename = os.path.basename(name)
+        def f(pw):
+            if self.wallet.use_encryption:
+                try:
+                    self.wallet.check_password(old_password)
+                except:
+                    self.show_error("Invalid PIN")
+                    return
+            os.unlink, (name,)
+            self.show_error("File %s removed."%basename)
+        self.protected(_("Enter your PIN code to delete %s") % basename, f, ())
+
     def show_seed(self, label):
         self.protected(_("Enter your PIN code in order to decrypt your seed"), self._show_seed, (label,))
 

gui/kivy/uix/dialogs/wallets.py

@@ -73,6 +73,5 @@ class WalletDialog(Factory.Popup):
     def delete_wallet(self, app):
         from question import Question
         name = self.ids.wallet_selector.selection[0]
-        f = lambda: os.unlink(name)
-        d = Question(_('Delete wallet?') + '\n' + os.path.basename(name), f)
+        d = Question(_('Delete wallet?') + '\n' + os.path.basename(name), lambda: app.delete_wallet(name))
         d.open()