dbb: do show_address in different thread

plugins/digitalbitbox/digitalbitbox.py

@@ -724,3 +724,13 @@ class DigitalBitboxPlugin(HW_PluginBase):
         if client is not None:
             client.check_device_dialog()
         return client
+
+    def show_address(self, wallet, keystore, address):
+        change, index = wallet.get_address_index(address)
+        keypath = '%s/%d/%d' % (keystore.derivation, change, index)
+        xpub = self.get_client(keystore)._get_xpub(keypath)
+        verify_request_payload = {
+            "type": 'p2pkh',
+            "echo": xpub['echo'],
+        }
+        self.comserver_post_notification(verify_request_payload)

plugins/digitalbitbox/qt.py

@@ -1,3 +1,5 @@
+from functools import partial
+
 from ..hw_wallet.qt import QtHandlerBase, QtPluginBase
 from .digitalbitbox import DigitalBitboxPlugin
 
@@ -30,14 +32,7 @@ class Plugin(DigitalBitboxPlugin, QtPluginBase):
 
         if len(addrs) == 1:
             def show_address():
-                change, index = wallet.get_address_index(addrs[0])
-                keypath = '%s/%d/%d' % (keystore.derivation, change, index)
-                xpub = self.get_client(keystore)._get_xpub(keypath)
-                verify_request_payload = {
-                    "type": 'p2pkh',
-                    "echo": xpub['echo'],
-                    }
-                self.comserver_post_notification(verify_request_payload)
+                keystore.thread.add(partial(self.show_address, wallet, keystore, addrs[0]))
 
             menu.addAction(_("Show on {}").format(self.device), show_address)