bitbox02: don't run show_xpub on GUI thread

electrum/plugins/bitbox02/bitbox02.py

@@ -196,7 +196,7 @@ class BitBox02Client(HardwareClientBase):
         node = bip32.BIP32Node.from_xkey(xpub, net = constants.BitcoinMainnet()).subkey_at_public_derivation(())
         return node.eckey.get_public_key_bytes(compressed=True).hex()
 
-    def get_xpub(self, bip32_path: str, xtype: str, display: bool = False) -> str:
+    def get_xpub(self, bip32_path: str, xtype: str, *, display: bool = False) -> str:
         if self.bitbox02_device is None:
             self.pairing_dialog(wizard=False)
 
@@ -612,3 +612,10 @@ class BitBox02Plugin(HW_PluginBase):
         txin_type = wallet.get_txin_type(address)
         sequence = wallet.get_address_index(address)
         keystore.show_address(sequence, txin_type, wallet)
+
+    def show_xpub(self, keystore: BitBox02_KeyStore):
+        client = keystore.get_client()
+        assert isinstance(client, BitBox02Client)
+        derivation = keystore.get_derivation_prefix()
+        xtype = keystore.get_bip32_node_for_xpub().xtype
+        client.get_xpub(derivation, xtype, display=True)

electrum/plugins/bitbox02/qt.py

@@ -28,7 +28,6 @@ from electrum.i18n import _
 from electrum.plugin import hook
 from electrum.wallet import Multisig_Wallet
 from electrum.transaction import PartialTransaction
-from electrum import keystore
 
 from .bitbox02 import BitBox02Plugin
 from ..hw_wallet.qt import QtHandlerBase, QtPluginBase
@@ -77,11 +76,11 @@ class Plugin(BitBox02Plugin, QtPluginBase):
                 selected_keystore_index = labels_clayout.selected_index()
             keystores = wallet.get_keystores()
             selected_keystore = keystores[selected_keystore_index]
-            derivation = selected_keystore.get_derivation_prefix()
             if type(selected_keystore) != self.keystore_class:
                 main_window.show_error("Select a BitBox02 xpub")
-            selected_keystore.get_client().get_xpub(
-                derivation, keystore.xtype_from_derivation(derivation), True
+                return
+            selected_keystore.thread.add(
+                partial(self.show_xpub, keystore=selected_keystore)
             )
 
         btn.clicked.connect(lambda unused: on_button_click())