#!/usr/bin/env python # # Electrum - lightweight Bitcoin client # Copyright (C) 2012 thomasv@gitorious # # Permission is hereby granted, free of charge, to any person # obtaining a copy of this software and associated documentation files # (the "Software"), to deal in the Software without restriction, # including without limitation the rights to use, copy, modify, merge, # publish, distribute, sublicense, and/or sell copies of the Software, # and to permit persons to whom the Software is furnished to do so, # subject to the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS # BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE # SOFTWARE. import socket import time from enum import IntEnum from typing import Tuple, TYPE_CHECKING import threading from PyQt5.QtCore import Qt, pyqtSignal, QThread from PyQt5.QtWidgets import (QTreeWidget, QTreeWidgetItem, QMenu, QGridLayout, QComboBox, QLineEdit, QDialog, QVBoxLayout, QHeaderView, QCheckBox, QTabWidget, QWidget, QLabel) from PyQt5.QtGui import QFontMetrics from electrum.i18n import _ from electrum import constants, blockchain, util from electrum.interface import ServerAddr, PREFERRED_NETWORK_PROTOCOL from electrum.network import Network from electrum.logging import get_logger from electrum.util import detect_tor_socks_proxy from electrum.simple_config import SimpleConfig from .util import (Buttons, CloseButton, HelpButton, read_QIcon, char_width_in_lineedit, PasswordLineEdit) from .util import QtEventListener, qt_event_listener _logger = get_logger(__name__) protocol_names = ['TCP', 'SSL'] protocol_letters = 'ts' class NetworkDialog(QDialog, QtEventListener): def __init__(self, *, network: Network, config: 'SimpleConfig'): QDialog.__init__(self) self.setWindowTitle(_('Network')) self.setMinimumSize(500, 500) self.nlayout = NetworkChoiceLayout(network, config) vbox = QVBoxLayout(self) vbox.addLayout(self.nlayout.layout()) vbox.addLayout(Buttons(CloseButton(self))) self.register_callbacks() self._cleaned_up = False def show(self): super().show() if td := self.nlayout.td: td.trigger_rescan() @qt_event_listener def on_event_network_updated(self): self.nlayout.update() def clean_up(self): if self._cleaned_up: return self._cleaned_up = True self.nlayout.clean_up() self.unregister_callbacks() class NodesListWidget(QTreeWidget): """List of connected servers.""" SERVER_ADDR_ROLE = Qt.UserRole + 100 CHAIN_ID_ROLE = Qt.UserRole + 101 ITEMTYPE_ROLE = Qt.UserRole + 102 class ItemType(IntEnum): CHAIN = 0 CONNECTED_SERVER = 1 DISCONNECTED_SERVER = 2 TOPLEVEL = 3 def __init__(self, parent): QTreeWidget.__init__(self) self.parent = parent # type: NetworkChoiceLayout self.setHeaderLabels([_('Server'), _('Height')]) self.setContextMenuPolicy(Qt.CustomContextMenu) self.customContextMenuRequested.connect(self.create_menu) def create_menu(self, position): item = self.currentItem() if not item: return item_type = item.data(0, self.ITEMTYPE_ROLE) menu = QMenu() if item_type == self.ItemType.CONNECTED_SERVER: server = item.data(0, self.SERVER_ADDR_ROLE) # type: ServerAddr menu.addAction(_("Use as server"), lambda: self.parent.follow_server(server)) elif item_type == self.ItemType.DISCONNECTED_SERVER: server = item.data(0, self.SERVER_ADDR_ROLE) # type: ServerAddr def func(): self.parent.server_e.setText(str(server)) self.parent.set_server() menu.addAction(_("Use as server"), func) elif item_type == self.ItemType.CHAIN: chain_id = item.data(0, self.CHAIN_ID_ROLE) menu.addAction(_("Follow this branch"), lambda: self.parent.follow_branch(chain_id)) else: return menu.exec_(self.viewport().mapToGlobal(position)) def keyPressEvent(self, event): if event.key() in [Qt.Key_F2, Qt.Key_Return, Qt.Key_Enter]: self.on_activated(self.currentItem(), self.currentColumn()) else: QTreeWidget.keyPressEvent(self, event) def on_activated(self, item, column): # on 'enter' we show the menu pt = self.visualItemRect(item).bottomLeft() pt.setX(50) self.customContextMenuRequested.emit(pt) def update(self, *, network: Network, servers: dict, use_tor: bool): self.clear() # connected servers connected_servers_item = QTreeWidgetItem([_("Connected nodes"), '']) connected_servers_item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.TOPLEVEL) chains = network.get_blockchains() n_chains = len(chains) for chain_id, interfaces in chains.items(): b = blockchain.blockchains.get(chain_id) if b is None: continue name = b.get_name() if n_chains > 1: x = QTreeWidgetItem([name + '@%d'%b.get_max_forkpoint(), '%d'%b.height()]) x.setData(0, self.ITEMTYPE_ROLE, self.ItemType.CHAIN) x.setData(0, self.CHAIN_ID_ROLE, b.get_id()) else: x = connected_servers_item for i in interfaces: item = QTreeWidgetItem([f"{i.server.to_friendly_name()}", '%d'%i.tip]) item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.CONNECTED_SERVER) item.setData(0, self.SERVER_ADDR_ROLE, i.server) item.setToolTip(0, str(i.server)) if i == network.interface: item.setIcon(0, read_QIcon("chevron-right.png")) x.addChild(item) if n_chains > 1: connected_servers_item.addChild(x) # disconnected servers disconnected_servers_item = QTreeWidgetItem([_("Other known servers"), ""]) disconnected_servers_item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.TOPLEVEL) connected_hosts = set([iface.host for ifaces in chains.values() for iface in ifaces]) protocol = PREFERRED_NETWORK_PROTOCOL for _host, d in sorted(servers.items()): if _host in connected_hosts: continue if _host.endswith('.onion') and not use_tor: continue port = d.get(protocol) if port: server = ServerAddr(_host, port, protocol=protocol) item = QTreeWidgetItem([server.net_addr_str(), ""]) item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.DISCONNECTED_SERVER) item.setData(0, self.SERVER_ADDR_ROLE, server) disconnected_servers_item.addChild(item) self.addTopLevelItem(connected_servers_item) self.addTopLevelItem(disconnected_servers_item) connected_servers_item.setExpanded(True) for i in range(connected_servers_item.childCount()): connected_servers_item.child(i).setExpanded(True) disconnected_servers_item.setExpanded(True) # headers h = self.header() h.setStretchLastSection(False) h.setSectionResizeMode(0, QHeaderView.Stretch) h.setSectionResizeMode(1, QHeaderView.ResizeToContents) super().update() class NetworkChoiceLayout(object): def __init__(self, network: Network, config: 'SimpleConfig', wizard=False): self.network = network self.config = config self.tor_proxy = None self.tabs = tabs = QTabWidget() self._proxy_tab = proxy_tab = QWidget() blockchain_tab = QWidget() tabs.addTab(blockchain_tab, _('Overview')) tabs.addTab(proxy_tab, _('Proxy')) tabs.currentChanged.connect(self._on_tab_changed) fixed_width_hostname = 24 * char_width_in_lineedit() fixed_width_port = 6 * char_width_in_lineedit() # Proxy tab grid = QGridLayout(proxy_tab) grid.setSpacing(8) # proxy setting self.proxy_cb = QCheckBox(_('Use proxy')) self.proxy_cb.clicked.connect(self.check_disable_proxy) self.proxy_cb.clicked.connect(self.set_proxy) self.proxy_mode = QComboBox() self.proxy_mode.addItems(['SOCKS4', 'SOCKS5']) self.proxy_host = QLineEdit() self.proxy_host.setFixedWidth(fixed_width_hostname) self.proxy_port = QLineEdit() self.proxy_port.setFixedWidth(fixed_width_port) self.proxy_user = QLineEdit() self.proxy_user.setPlaceholderText(_("Proxy user")) self.proxy_password = PasswordLineEdit() self.proxy_password.setPlaceholderText(_("Password")) self.proxy_password.setFixedWidth(fixed_width_port) self.proxy_mode.currentIndexChanged.connect(self.set_proxy) self.proxy_host.editingFinished.connect(self.set_proxy) self.proxy_port.editingFinished.connect(self.set_proxy) self.proxy_user.editingFinished.connect(self.set_proxy) self.proxy_password.editingFinished.connect(self.set_proxy) self.proxy_mode.currentIndexChanged.connect(self.proxy_settings_changed) self.proxy_host.textEdited.connect(self.proxy_settings_changed) self.proxy_port.textEdited.connect(self.proxy_settings_changed) self.proxy_user.textEdited.connect(self.proxy_settings_changed) self.proxy_password.textEdited.connect(self.proxy_settings_changed) self.tor_cb = QCheckBox(_("Use Tor Proxy")) self.tor_cb.setIcon(read_QIcon("tor_logo.png")) self.tor_cb.hide() self.tor_cb.clicked.connect(self.use_tor_proxy) grid.addWidget(self.tor_cb, 1, 0, 1, 3) grid.addWidget(self.proxy_cb, 2, 0, 1, 3) grid.addWidget(HelpButton(_('Proxy settings apply to all connections: with Electrum servers, but also with third-party services.')), 2, 4) grid.addWidget(self.proxy_mode, 4, 1) grid.addWidget(self.proxy_host, 4, 2) grid.addWidget(self.proxy_port, 4, 3) grid.addWidget(self.proxy_user, 5, 2) grid.addWidget(self.proxy_password, 5, 3) grid.setRowStretch(7, 1) # Blockchain Tab grid = QGridLayout(blockchain_tab) msg = ' '.join([ _("Electrum connects to several nodes in order to download block headers and find out the longest blockchain."), _("This blockchain is used to verify the transactions sent by your transaction server.") ]) self.status_label = QLabel('') grid.addWidget(QLabel(_('Status') + ':'), 0, 0) grid.addWidget(self.status_label, 0, 1, 1, 3) grid.addWidget(HelpButton(msg), 0, 4) self.autoconnect_cb = QCheckBox(_('Select server automatically')) self.autoconnect_cb.setEnabled(self.config.cv.NETWORK_AUTO_CONNECT.is_modifiable()) self.autoconnect_cb.clicked.connect(self.set_server) self.autoconnect_cb.clicked.connect(self.update) msg = ' '.join([ _("If auto-connect is enabled, Electrum will always use a server that is on the longest blockchain."), _("If it is disabled, you have to choose a server you want to use. Electrum will warn you if your server is lagging.") ]) grid.addWidget(self.autoconnect_cb, 1, 0, 1, 3) grid.addWidget(HelpButton(msg), 1, 4) self.server_e = QLineEdit() self.server_e.setFixedWidth(fixed_width_hostname + fixed_width_port) self.server_e.editingFinished.connect(self.set_server) msg = _("Electrum sends your wallet addresses to a single server, in order to receive your transaction history.") grid.addWidget(QLabel(_('Server') + ':'), 2, 0) grid.addWidget(self.server_e, 2, 1, 1, 3) grid.addWidget(HelpButton(msg), 2, 4) self.height_label = QLabel('') msg = _('This is the height of your local copy of the blockchain.') grid.addWidget(QLabel(_('Blockchain') + ':'), 3, 0) grid.addWidget(self.height_label, 3, 1) grid.addWidget(HelpButton(msg), 3, 4) self.split_label = QLabel('') grid.addWidget(self.split_label, 4, 0, 1, 3) self.nodes_list_widget = NodesListWidget(self) grid.addWidget(self.nodes_list_widget, 6, 0, 1, 5) vbox = QVBoxLayout() vbox.addWidget(tabs) self.layout_ = vbox # tor detector self.td = td = TorDetector() td.found_proxy.connect(self.suggest_proxy) td.start() self.fill_in_proxy_settings() self.update() def clean_up(self): if self.td: self.td.found_proxy.disconnect() self.td.stop() self.td = None def check_disable_proxy(self, b): if not self.config.cv.NETWORK_PROXY.is_modifiable(): b = False for w in [self.proxy_mode, self.proxy_host, self.proxy_port, self.proxy_user, self.proxy_password]: w.setEnabled(b) def enable_set_server(self): if self.config.cv.NETWORK_SERVER.is_modifiable(): enabled = not self.autoconnect_cb.isChecked() self.server_e.setEnabled(enabled) else: for w in [self.autoconnect_cb, self.server_e, self.nodes_list_widget]: w.setEnabled(False) def update(self): net_params = self.network.get_parameters() server = net_params.server auto_connect = net_params.auto_connect if not self.server_e.hasFocus(): self.server_e.setText(server.to_friendly_name()) self.autoconnect_cb.setChecked(auto_connect) height_str = "%d "%(self.network.get_local_height()) + _('blocks') self.height_label.setText(height_str) self.status_label.setText(self.network.get_status()) chains = self.network.get_blockchains() if len(chains) > 1: chain = self.network.blockchain() forkpoint = chain.get_max_forkpoint() name = chain.get_name() msg = _('Chain split detected at block {0}').format(forkpoint) + '\n' msg += (_('You are following branch') if auto_connect else _('Your server is on branch'))+ ' ' + name msg += ' (%d %s)' % (chain.get_branch_size(), _('blocks')) else: msg = '' self.split_label.setText(msg) self.nodes_list_widget.update(network=self.network, servers=self.network.get_servers(), use_tor=self.tor_cb.isChecked()) self.enable_set_server() def fill_in_proxy_settings(self): proxy_config = self.network.get_parameters().proxy if not proxy_config: proxy_config = {"mode": "none", "host": "localhost", "port": "9050"} b = proxy_config.get('mode') != "none" self.check_disable_proxy(b) if b: self.proxy_cb.setChecked(True) self.proxy_mode.setCurrentIndex( self.proxy_mode.findText(str(proxy_config.get("mode").upper()))) self.proxy_host.setText(proxy_config.get("host")) self.proxy_port.setText(proxy_config.get("port")) self.proxy_user.setText(proxy_config.get("user", "")) self.proxy_password.setText(proxy_config.get("password", "")) def layout(self): return self.layout_ def follow_branch(self, chain_id): self.network.run_from_another_thread(self.network.follow_chain_given_id(chain_id)) self.update() def follow_server(self, server: ServerAddr): self.network.run_from_another_thread(self.network.follow_chain_given_server(server)) self.update() def accept(self): pass def set_server(self): net_params = self.network.get_parameters() try: server = ServerAddr.from_str_with_inference(str(self.server_e.text())) if not server: raise Exception("failed to parse") except Exception: return net_params = net_params._replace(server=server, auto_connect=self.autoconnect_cb.isChecked()) self.network.run_from_another_thread(self.network.set_parameters(net_params)) def set_proxy(self): net_params = self.network.get_parameters() if self.proxy_cb.isChecked(): proxy = {'mode':str(self.proxy_mode.currentText()).lower(), 'host':str(self.proxy_host.text()), 'port':str(self.proxy_port.text()), 'user':str(self.proxy_user.text()), 'password':str(self.proxy_password.text())} else: proxy = None self.tor_cb.setChecked(False) net_params = net_params._replace(proxy=proxy) self.network.run_from_another_thread(self.network.set_parameters(net_params)) def _on_tab_changed(self): if self.tabs.currentWidget() is self._proxy_tab: self.td.trigger_rescan() def suggest_proxy(self, found_proxy): if found_proxy is None: self.tor_cb.hide() return self.tor_proxy = found_proxy self.tor_cb.setText("Use Tor proxy at port " + str(found_proxy[1])) if (self.proxy_cb.isChecked() and self.proxy_mode.currentIndex() == self.proxy_mode.findText('SOCKS5') and self.proxy_host.text() == "127.0.0.1" and self.proxy_port.text() == str(found_proxy[1])): self.tor_cb.setChecked(True) self.tor_cb.show() def use_tor_proxy(self, use_it): if not use_it: self.proxy_cb.setChecked(False) else: socks5_mode_index = self.proxy_mode.findText('SOCKS5') if socks5_mode_index == -1: _logger.info("can't find proxy_mode 'SOCKS5'") return self.proxy_mode.setCurrentIndex(socks5_mode_index) self.proxy_host.setText("127.0.0.1") self.proxy_port.setText(str(self.tor_proxy[1])) self.proxy_user.setText("") self.proxy_password.setText("") self.tor_cb.setChecked(True) self.proxy_cb.setChecked(True) self.check_disable_proxy(use_it) self.set_proxy() def proxy_settings_changed(self): self.tor_cb.setChecked(False) class TorDetector(QThread): found_proxy = pyqtSignal(object) def __init__(self): QThread.__init__(self) self._work_to_do_evt = threading.Event() self._stopping = False def run(self): while True: # do rescan net_addr = detect_tor_socks_proxy() self.found_proxy.emit(net_addr) # wait until triggered self._work_to_do_evt.wait() self._work_to_do_evt.clear() if self._stopping: return def trigger_rescan(self) -> None: self._work_to_do_evt.set() def stop(self): self._stopping = True self._work_to_do_evt.set() self.exit() self.wait()