tbip39_recovery_dialog.py - electrum - Electrum Bitcoin wallet
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       tbip39_recovery_dialog.py (2977B)
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            1 # Copyright (C) 2020 The Electrum developers
            2 # Distributed under the MIT software license, see the accompanying
            3 # file LICENCE or http://www.opensource.org/licenses/mit-license.php
            4 
            5 from PyQt5.QtCore import Qt
            6 from PyQt5.QtWidgets import QWidget, QVBoxLayout, QGridLayout, QLabel, QListWidget, QListWidgetItem
            7 
            8 from electrum.i18n import _
            9 from electrum.network import Network
           10 from electrum.bip39_recovery import account_discovery
           11 from electrum.logging import get_logger
           12 
           13 from .util import WindowModalDialog, MessageBoxMixin, TaskThread, Buttons, CancelButton, OkButton
           14 
           15 
           16 _logger = get_logger(__name__)
           17 
           18 
           19 class Bip39RecoveryDialog(WindowModalDialog):
           20     def __init__(self, parent: QWidget, get_account_xpub, on_account_select):
           21         self.get_account_xpub = get_account_xpub
           22         self.on_account_select = on_account_select
           23         WindowModalDialog.__init__(self, parent, _('BIP39 Recovery'))
           24         self.setMinimumWidth(400)
           25         vbox = QVBoxLayout(self)
           26         self.content = QVBoxLayout()
           27         self.content.addWidget(QLabel(_('Scanning common paths for existing accounts...')))
           28         vbox.addLayout(self.content)
           29         self.ok_button = OkButton(self)
           30         self.ok_button.clicked.connect(self.on_ok_button_click)
           31         self.ok_button.setEnabled(False)
           32         vbox.addLayout(Buttons(CancelButton(self), self.ok_button))
           33         self.finished.connect(self.on_finished)
           34         self.show()
           35         self.thread = TaskThread(self)
           36         self.thread.finished.connect(self.deleteLater) # see #3956
           37         self.thread.add(self.recovery, self.on_recovery_success, None, self.on_recovery_error)
           38 
           39     def on_finished(self):
           40         self.thread.stop()
           41 
           42     def on_ok_button_click(self):
           43         item = self.list.currentItem()
           44         account = item.data(Qt.UserRole)
           45         self.on_account_select(account)
           46 
           47     def recovery(self):
           48         network = Network.get_instance()
           49         coroutine = account_discovery(network, self.get_account_xpub)
           50         return network.run_from_another_thread(coroutine)
           51 
           52     def on_recovery_success(self, accounts):
           53         self.clear_content()
           54         if len(accounts) == 0:
           55             self.content.addWidget(QLabel(_('No existing accounts found.')))
           56             return
           57         self.content.addWidget(QLabel(_('Choose an account to restore.')))
           58         self.list = QListWidget()
           59         for account in accounts:
           60             item = QListWidgetItem(account['description'])
           61             item.setData(Qt.UserRole, account)
           62             self.list.addItem(item)
           63         self.list.clicked.connect(lambda: self.ok_button.setEnabled(True))
           64         self.content.addWidget(self.list)
           65 
           66     def on_recovery_error(self, exc_info):
           67         self.clear_content()
           68         self.content.addWidget(QLabel(_('Error: Account discovery failed.')))
           69         _logger.error(f"recovery error", exc_info=exc_info)
           70 
           71     def clear_content(self):
           72         for i in reversed(range(self.content.count())):
           73             self.content.itemAt(i).widget().setParent(None)