SomberNight
6 years ago
3 changed files with 145 additions and 131 deletions
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# Copyright (C) 2019 The Electrum developers |
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# Distributed under the MIT software license, see the accompanying |
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# file LICENCE or http://www.opensource.org/licenses/mit-license.php |
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import asyncio |
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import base64 |
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from distutils.version import StrictVersion |
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from PyQt5.QtCore import Qt, QThread, pyqtSignal |
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from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QLabel, QProgressBar, |
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QHBoxLayout, QPushButton) |
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from electrum import version |
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from electrum import constants |
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from electrum import ecc |
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from electrum.i18n import _ |
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from electrum.util import PrintError, make_aiohttp_session |
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class UpdateCheck(QWidget, PrintError): |
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url = "https://electrum.org/version" |
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download_url = "https://electrum.org/#download" |
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VERSION_ANNOUNCEMENT_SIGNING_KEYS = ( |
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"13xjmVAB1EATPP8RshTE8S8sNwwSUM9p1P", |
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) |
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def __init__(self, main_window, latest_version=None): |
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self.main_window = main_window |
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QWidget.__init__(self) |
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self.setWindowTitle('Electrum - ' + _('Update Check')) |
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self.content = QVBoxLayout() |
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self.content.setContentsMargins(*[10]*4) |
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self.heading_label = QLabel() |
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self.content.addWidget(self.heading_label) |
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self.detail_label = QLabel() |
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self.detail_label.setTextInteractionFlags(Qt.LinksAccessibleByMouse) |
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self.detail_label.setOpenExternalLinks(True) |
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self.content.addWidget(self.detail_label) |
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self.pb = QProgressBar() |
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self.pb.setMaximum(0) |
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self.pb.setMinimum(0) |
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self.content.addWidget(self.pb) |
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versions = QHBoxLayout() |
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versions.addWidget(QLabel(_("Current version: {}".format(version.ELECTRUM_VERSION)))) |
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self.latest_version_label = QLabel(_("Latest version: {}".format(" "))) |
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versions.addWidget(self.latest_version_label) |
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self.content.addLayout(versions) |
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self.update_view(latest_version) |
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self.update_check_thread = UpdateCheckThread(self.main_window) |
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self.update_check_thread.checked.connect(self.on_version_retrieved) |
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self.update_check_thread.failed.connect(self.on_retrieval_failed) |
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self.update_check_thread.start() |
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close_button = QPushButton(_("Close")) |
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close_button.clicked.connect(self.close) |
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self.content.addWidget(close_button) |
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self.setLayout(self.content) |
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self.show() |
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def on_version_retrieved(self, version): |
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self.update_view(version) |
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def on_retrieval_failed(self): |
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self.heading_label.setText('<h2>' + _("Update check failed") + '</h2>') |
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self.detail_label.setText(_("Sorry, but we were unable to check for updates. Please try again later.")) |
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self.pb.hide() |
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@staticmethod |
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def is_newer(latest_version): |
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return latest_version > StrictVersion(version.ELECTRUM_VERSION) |
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def update_view(self, latest_version=None): |
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if latest_version: |
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self.pb.hide() |
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self.latest_version_label.setText(_("Latest version: {}".format(latest_version))) |
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if self.is_newer(latest_version): |
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self.heading_label.setText('<h2>' + _("There is a new update available") + '</h2>') |
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url = "<a href='{u}'>{u}</a>".format(u=UpdateCheck.download_url) |
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self.detail_label.setText(_("You can download the new version from {}.").format(url)) |
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else: |
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self.heading_label.setText('<h2>' + _("Already up to date") + '</h2>') |
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self.detail_label.setText(_("You are already on the latest version of Electrum.")) |
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else: |
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self.heading_label.setText('<h2>' + _("Checking for updates...") + '</h2>') |
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self.detail_label.setText(_("Please wait while Electrum checks for available updates.")) |
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class UpdateCheckThread(QThread, PrintError): |
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checked = pyqtSignal(object) |
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failed = pyqtSignal() |
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def __init__(self, main_window): |
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super().__init__() |
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self.main_window = main_window |
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async def get_update_info(self): |
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async with make_aiohttp_session(proxy=self.main_window.network.proxy) as session: |
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async with session.get(UpdateCheck.url) as result: |
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signed_version_dict = await result.json(content_type=None) |
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# example signed_version_dict: |
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# { |
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# "version": "3.9.9", |
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# "signatures": { |
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# "1Lqm1HphuhxKZQEawzPse8gJtgjm9kUKT4": "IA+2QG3xPRn4HAIFdpu9eeaCYC7S5wS/sDxn54LJx6BdUTBpse3ibtfq8C43M7M1VfpGkD5tsdwl5C6IfpZD/gQ=" |
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# } |
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# } |
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version_num = signed_version_dict['version'] |
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sigs = signed_version_dict['signatures'] |
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for address, sig in sigs.items(): |
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if address not in UpdateCheck.VERSION_ANNOUNCEMENT_SIGNING_KEYS: |
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continue |
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sig = base64.b64decode(sig) |
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msg = version_num.encode('utf-8') |
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if ecc.verify_message_with_address(address=address, sig65=sig, message=msg, |
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net=constants.BitcoinMainnet): |
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self.print_error(f"valid sig for version announcement '{version_num}' from address '{address}'") |
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break |
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else: |
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raise Exception('no valid signature for version announcement') |
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return StrictVersion(version_num.strip()) |
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def run(self): |
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network = self.main_window.network |
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if not network: |
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self.failed.emit() |
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return |
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try: |
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update_info = asyncio.run_coroutine_threadsafe(self.get_update_info(), network.asyncio_loop).result() |
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except Exception as e: |
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#self.print_error(traceback.format_exc()) |
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self.print_error(f"got exception: '{repr(e)}'") |
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self.failed.emit() |
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else: |
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self.checked.emit(update_info) |
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