base_wizard: only check xpub type if have xpub

lib/base_wizard.py

@@ -307,16 +307,19 @@ class BaseWizard(object):
         self.on_keystore(k)
 
     def on_keystore(self, k):
+        has_xpub = isinstance(k, keystore.Xpub)
+        if has_xpub:
             from .bitcoin import xpub_type
-        t1 = xpub_type(k.xpub) #fixme: old wallets
+            t1 = xpub_type(k.xpub)
         if self.wallet_type == 'standard':
-            if t1 not in ['standard', 'p2wpkh', 'p2wpkh-p2sh']:
+            if has_xpub and t1 not in ['standard', 'p2wpkh', 'p2wpkh-p2sh']:
                 self.show_error(_('Wrong key type') + ' %s'%t1)
                 self.run('choose_keystore')
                 return
             self.keystores.append(k)
             self.run('create_wallet')
         elif self.wallet_type == 'multisig':
+            assert has_xpub
             if t1 not in ['standard', 'p2wsh', 'p2wsh-p2sh']:
                 self.show_error(_('Wrong key type') + ' %s'%t1)
                 self.run('choose_keystore')