restore bip39 option for multisig, add a warning when option is clicked.

gui/qt/installwizard.py

@@ -256,6 +256,19 @@ class InstallWizard(QDialog, MessageBoxMixin, BaseWizard):
             vbox.addStretch(1)
             vbox.addWidget(QLabel(_('Options') + ':'))
             def f(b):
+                if b:
+                    msg = ' '.join([
+                        '<b>' + _('Warning') + '</b>' + ': ',
+                        _('BIP39 seeds may not be supported in the future.'),
+                        '<br/><br/>',
+                        _('As technology matures, Bitcoin address generation may change.'),
+                        _('However, BIP39 seeds do not include a version number.'),
+                        _('As a result, it is not possible to infer your wallet type from a BIP39 seed.'),
+                        '<br/><br/>',
+                        _('We do not guarantee that BIP39 seeds will be supported in future versions of Electrum.'),
+                        _('We recommend to use seeds generated by Electrum or compatible wallets.'),
+                    ])
+                    self.show_warning(msg)
                 slayout.is_seed = (lambda x: bool(x)) if b else is_seed
                 slayout.on_edit()
             cb_bip39 = QCheckBox(_('BIP39 seed'))

lib/base_wizard.py

@@ -259,12 +259,8 @@ class BaseWizard(object):
         self.line_dialog(title=_('Passphrase'), message=message, warning=warning, default='', test=lambda x:True, run_next=run_next)
 
     def restore_from_seed(self):
-        if self.wallet_type == 'standard':
-            self.opt_bip39 = True
-            test = bitcoin.is_seed
-        else:
-            self.opt_bip39 = False
-            test = bitcoin.is_new_seed
+        self.opt_bip39 = True
+        test = bitcoin.is_seed
         self.restore_seed_dialog(run_next=self.on_restore_seed, test=test)
 
     def on_restore_seed(self, seed, is_bip39):