#!/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 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 from electrum.interface import serialize_server, deserialize_server from electrum.network import Network from electrum.logging import get_logger from .util import Buttons, CloseButton, HelpButton, read_QIcon, char_width_in_lineedit _logger = get_logger(__name__) protocol_names = ['TCP', 'SSL'] protocol_letters = 'ts' class NetworkDialog(QDialog): def __init__(self, network, config, network_updated_signal_obj): QDialog.__init__(self) self.setWindowTitle(_('Network')) self.setMinimumSize(500, 300) self.nlayout = NetworkChoiceLayout(network, config) self.network_updated_signal_obj = network_updated_signal_obj vbox = QVBoxLayout(self) vbox.addLayout(self.nlayout.layout()) vbox.addLayout(Buttons(CloseButton(self))) self.network_updated_signal_obj.network_updated_signal.connect( self.on_update) network.register_callback(self.on_network, ['network_updated']) def on_network(self, event, *args): self.network_updated_signal_obj.network_updated_signal.emit(event, args) def on_update(self): self.nlayout.update() class NodesListWidget(QTreeWidget): def __init__(self, parent): QTreeWidget.__init__(self) self.parent = parent self.setHeaderLabels([_('Connected node'), _('Height')]) self.setContextMenuPolicy(Qt.CustomContextMenu) self.customContextMenuRequested.connect(self.create_menu) def create_menu(self, position): item = self.currentItem() if not item: return is_server = not bool(item.data(0, Qt.UserRole)) menu = QMenu() if is_server: server = item.data(1, Qt.UserRole) menu.addAction(_("Use as server"), lambda: self.parent.follow_server(server)) else: chain_id = item.data(1, Qt.UserRole) menu.addAction(_("Follow this branch"), lambda: self.parent.follow_branch(chain_id)) menu.exec_(self.viewport().mapToGlobal(position)) def keyPressEvent(self, event): if event.key() in [ Qt.Key_F2, Qt.Key_Return ]: 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): self.clear() self.addChild = self.addTopLevelItem 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, Qt.UserRole, 1) x.setData(1, Qt.UserRole, b.get_id()) else: x = self for i in interfaces: star = ' *' if i == network.interface else '' item = QTreeWidgetItem([i.host + star, '%d'%i.tip]) item.setData(0, Qt.UserRole, 0) item.setData(1, Qt.UserRole, i.server) x.addChild(item) if n_chains > 1: self.addTopLevelItem(x) x.setExpanded(True) h = self.header() h.setStretchLastSection(False) h.setSectionResizeMode(0, QHeaderView.Stretch) h.setSectionResizeMode(1, QHeaderView.ResizeToContents) super().update() class ServerListWidget(QTreeWidget): class Columns(IntEnum): HOST = 0 PORT = 1 SERVER_STR_ROLE = Qt.UserRole + 100 def __init__(self, parent): QTreeWidget.__init__(self) self.parent = parent self.setHeaderLabels([_('Host'), _('Port')]) self.setContextMenuPolicy(Qt.CustomContextMenu) self.customContextMenuRequested.connect(self.create_menu) def create_menu(self, position): item = self.currentItem() if not item: return menu = QMenu() server = item.data(self.Columns.HOST, self.SERVER_STR_ROLE) menu.addAction(_("Use as server"), lambda: self.set_server(server)) menu.exec_(self.viewport().mapToGlobal(position)) def set_server(self, s): host, port, protocol = deserialize_server(s) self.parent.server_host.setText(host) self.parent.server_port.setText(port) self.parent.set_server() def keyPressEvent(self, event): if event.key() in [ Qt.Key_F2, Qt.Key_Return ]: 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, servers, protocol, use_tor): self.clear() for _host, d in sorted(servers.items()): if _host.endswith('.onion') and not use_tor: continue port = d.get(protocol) if port: x = QTreeWidgetItem([_host, port]) server = serialize_server(_host, port, protocol) x.setData(self.Columns.HOST, self.SERVER_STR_ROLE, server) self.addTopLevelItem(x) h = self.header() h.setStretchLastSection(False) h.setSectionResizeMode(self.Columns.HOST, QHeaderView.Stretch) h.setSectionResizeMode(self.Columns.PORT, QHeaderView.ResizeToContents) super().update() class NetworkChoiceLayout(object): def __init__(self, network: Network, config, wizard=False): self.network = network self.config = config self.protocol = None self.tor_proxy = None self.tabs = tabs = QTabWidget() server_tab = QWidget() proxy_tab = QWidget() blockchain_tab = QWidget() tabs.addTab(blockchain_tab, _('Overview')) tabs.addTab(server_tab, _('Server')) tabs.addTab(proxy_tab, _('Proxy')) fixed_width_hostname = 24 * char_width_in_lineedit() fixed_width_port = 6 * char_width_in_lineedit() # server tab grid = QGridLayout(server_tab) grid.setSpacing(8) self.server_host = QLineEdit() self.server_host.setFixedWidth(fixed_width_hostname) self.server_port = QLineEdit() self.server_port.setFixedWidth(fixed_width_port) self.autoconnect_cb = QCheckBox(_('Select server automatically')) self.autoconnect_cb.setEnabled(self.config.is_modifiable('auto_connect')) self.server_host.editingFinished.connect(self.set_server) self.server_port.editingFinished.connect(self.set_server) 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, 0, 0, 1, 3) grid.addWidget(HelpButton(msg), 0, 4) grid.addWidget(QLabel(_('Server') + ':'), 1, 0) grid.addWidget(self.server_host, 1, 1, 1, 2) grid.addWidget(self.server_port, 1, 3) label = _('Server peers') if network.is_connected() else _('Default Servers') grid.addWidget(QLabel(label), 2, 0, 1, 5) self.servers_list = ServerListWidget(self) grid.addWidget(self.servers_list, 3, 0, 1, 5) # 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 = QLineEdit() self.proxy_password.setPlaceholderText(_("Password")) self.proxy_password.setEchoMode(QLineEdit.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.server_label = QLabel('') msg = _("Electrum sends your wallet addresses to a single server, in order to receive your transaction history.") grid.addWidget(QLabel(_('Server') + ':'), 1, 0) grid.addWidget(self.server_label, 1, 1, 1, 3) grid.addWidget(HelpButton(msg), 1, 4) self.height_label = QLabel('') msg = _('This is the height of your local copy of the blockchain.') grid.addWidget(QLabel(_('Blockchain') + ':'), 2, 0) grid.addWidget(self.height_label, 2, 1) grid.addWidget(HelpButton(msg), 2, 4) self.split_label = QLabel('') grid.addWidget(self.split_label, 3, 0, 1, 3) self.nodes_list_widget = NodesListWidget(self) grid.addWidget(self.nodes_list_widget, 5, 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 check_disable_proxy(self, b): if not self.config.is_modifiable('proxy'): 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.is_modifiable('server'): enabled = not self.autoconnect_cb.isChecked() self.server_host.setEnabled(enabled) self.server_port.setEnabled(enabled) self.servers_list.setEnabled(enabled) else: for w in [self.autoconnect_cb, self.server_host, self.server_port, self.servers_list]: w.setEnabled(False) def update(self): net_params = self.network.get_parameters() host, port, protocol = net_params.host, net_params.port, net_params.protocol proxy_config, auto_connect = net_params.proxy, net_params.auto_connect if not self.server_host.hasFocus() and not self.server_port.hasFocus(): self.server_host.setText(host) self.server_port.setText(str(port)) self.autoconnect_cb.setChecked(auto_connect) interface = self.network.interface host = interface.host if interface else _('None') self.server_label.setText(host) self.set_protocol(protocol) self.servers = self.network.get_servers() self.servers_list.update(self.servers, self.protocol, self.tor_cb.isChecked()) self.enable_set_server() height_str = "%d "%(self.network.get_local_height()) + _('blocks') self.height_label.setText(height_str) n = len(self.network.get_interfaces()) status = _("Connected to {0} nodes.").format(n) if n else _("Not connected") self.status_label.setText(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(self.network) 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 set_protocol(self, protocol): if protocol != self.protocol: self.protocol = protocol def change_protocol(self, use_ssl): p = 's' if use_ssl else 't' host = self.server_host.text() pp = self.servers.get(host, constants.net.DEFAULT_PORTS) if p not in pp.keys(): p = list(pp.keys())[0] port = pp[p] self.server_host.setText(host) self.server_port.setText(port) self.set_protocol(p) self.set_server() 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): self.network.run_from_another_thread(self.network.follow_chain_given_server(server)) self.update() def server_changed(self, x): if x: self.change_server(str(x.text(0)), self.protocol) def change_server(self, host, protocol): pp = self.servers.get(host, constants.net.DEFAULT_PORTS) if protocol and protocol not in protocol_letters: protocol = None if protocol: port = pp.get(protocol) if port is None: protocol = None if not protocol: if 's' in pp.keys(): protocol = 's' port = pp.get(protocol) else: protocol = list(pp.keys())[0] port = pp.get(protocol) self.server_host.setText(host) self.server_port.setText(port) def accept(self): pass def set_server(self): net_params = self.network.get_parameters() net_params = net_params._replace(host=str(self.server_host.text()), port=str(self.server_port.text()), 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 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) def run(self): # Probable ports for Tor to listen at ports = [9050, 9150] while True: for p in ports: net_addr = ("127.0.0.1", p) if TorDetector.is_tor_port(net_addr): self.found_proxy.emit(net_addr) break else: self.found_proxy.emit(None) time.sleep(10) @staticmethod def is_tor_port(net_addr: Tuple[str, int]) -> bool: try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(0.1) s.connect(net_addr) # Tor responds uniquely to HTTP-like requests s.send(b"GET\n") if b"Tor is not an HTTP Proxy" in s.recv(1024): return True except socket.error: pass return False