24980feab7
A new config API is introduced, and ~all of the codebase is adapted to it.
The old API is kept but mainly only for dynamic usage where its extra flexibility is needed.
Using examples, the old config API looked this:
```
>>> config.get("request_expiry", 86400)
604800
>>> config.set_key("request_expiry", 86400)
>>>
```
The new config API instead:
```
>>> config.WALLET_PAYREQ_EXPIRY_SECONDS
604800
>>> config.WALLET_PAYREQ_EXPIRY_SECONDS = 86400
>>>
```
The old API operated on arbitrary string keys, the new one uses
a static ~enum-like list of variables.
With the new API:
- there is a single centralised list of config variables, as opposed to
these being scattered all over
- no more duplication of default values (in the getters)
- there is now some (minimal for now) type-validation/conversion for
the config values
closes https://github.com/spesmilo/electrum/pull/5640
closes https://github.com/spesmilo/electrum/pull/5649
Note: there is yet a third API added here, for certain niche/abstract use-cases,
where we need a reference to the config variable itself.
It should only be used when needed:
```
>>> var = config.cv.WALLET_PAYREQ_EXPIRY_SECONDS
>>> var
<ConfigVarWithConfig key='request_expiry'>
>>> var.get()
604800
>>> var.set(3600)
>>> var.get_default_value()
86400
>>> var.is_set()
True
>>> var.is_modifiable()
True
```
490 lines
19 KiB
Python
490 lines
19 KiB
Python
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2012 thomasv@gitorious
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import socket
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import time
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from enum import IntEnum
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from typing import Tuple, TYPE_CHECKING
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import threading
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from PyQt5.QtCore import Qt, pyqtSignal, QThread
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from PyQt5.QtWidgets import (QTreeWidget, QTreeWidgetItem, QMenu, QGridLayout, QComboBox,
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QLineEdit, QDialog, QVBoxLayout, QHeaderView, QCheckBox,
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QTabWidget, QWidget, QLabel)
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from PyQt5.QtGui import QFontMetrics
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from electrum.i18n import _
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from electrum import constants, blockchain, util
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from electrum.interface import ServerAddr, PREFERRED_NETWORK_PROTOCOL
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from electrum.network import Network
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from electrum.logging import get_logger
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from electrum.util import detect_tor_socks_proxy
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from electrum.simple_config import SimpleConfig
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from .util import (Buttons, CloseButton, HelpButton, read_QIcon, char_width_in_lineedit,
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PasswordLineEdit)
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from .util import QtEventListener, qt_event_listener
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_logger = get_logger(__name__)
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protocol_names = ['TCP', 'SSL']
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protocol_letters = 'ts'
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class NetworkDialog(QDialog, QtEventListener):
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def __init__(self, *, network: Network, config: 'SimpleConfig'):
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QDialog.__init__(self)
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self.setWindowTitle(_('Network'))
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self.setMinimumSize(500, 500)
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self.nlayout = NetworkChoiceLayout(network, config)
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vbox = QVBoxLayout(self)
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vbox.addLayout(self.nlayout.layout())
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vbox.addLayout(Buttons(CloseButton(self)))
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self.register_callbacks()
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self._cleaned_up = False
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def show(self):
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super().show()
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if td := self.nlayout.td:
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td.trigger_rescan()
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@qt_event_listener
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def on_event_network_updated(self):
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self.nlayout.update()
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def clean_up(self):
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if self._cleaned_up:
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return
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self._cleaned_up = True
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self.nlayout.clean_up()
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self.unregister_callbacks()
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class NodesListWidget(QTreeWidget):
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"""List of connected servers."""
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SERVER_ADDR_ROLE = Qt.UserRole + 100
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CHAIN_ID_ROLE = Qt.UserRole + 101
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ITEMTYPE_ROLE = Qt.UserRole + 102
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class ItemType(IntEnum):
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CHAIN = 0
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CONNECTED_SERVER = 1
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DISCONNECTED_SERVER = 2
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TOPLEVEL = 3
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def __init__(self, parent):
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QTreeWidget.__init__(self)
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self.parent = parent # type: NetworkChoiceLayout
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self.setHeaderLabels([_('Server'), _('Height')])
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self.setContextMenuPolicy(Qt.CustomContextMenu)
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self.customContextMenuRequested.connect(self.create_menu)
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def create_menu(self, position):
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item = self.currentItem()
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if not item:
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return
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item_type = item.data(0, self.ITEMTYPE_ROLE)
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menu = QMenu()
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if item_type == self.ItemType.CONNECTED_SERVER:
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server = item.data(0, self.SERVER_ADDR_ROLE) # type: ServerAddr
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menu.addAction(_("Use as server"), lambda: self.parent.follow_server(server))
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elif item_type == self.ItemType.DISCONNECTED_SERVER:
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server = item.data(0, self.SERVER_ADDR_ROLE) # type: ServerAddr
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def func():
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self.parent.server_e.setText(str(server))
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self.parent.set_server()
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menu.addAction(_("Use as server"), func)
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elif item_type == self.ItemType.CHAIN:
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chain_id = item.data(0, self.CHAIN_ID_ROLE)
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menu.addAction(_("Follow this branch"), lambda: self.parent.follow_branch(chain_id))
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else:
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return
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menu.exec_(self.viewport().mapToGlobal(position))
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def keyPressEvent(self, event):
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if event.key() in [Qt.Key_F2, Qt.Key_Return, Qt.Key_Enter]:
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self.on_activated(self.currentItem(), self.currentColumn())
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else:
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QTreeWidget.keyPressEvent(self, event)
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def on_activated(self, item, column):
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# on 'enter' we show the menu
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pt = self.visualItemRect(item).bottomLeft()
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pt.setX(50)
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self.customContextMenuRequested.emit(pt)
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def update(self, *, network: Network, servers: dict, use_tor: bool):
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self.clear()
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# connected servers
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connected_servers_item = QTreeWidgetItem([_("Connected nodes"), ''])
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connected_servers_item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.TOPLEVEL)
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chains = network.get_blockchains()
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n_chains = len(chains)
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for chain_id, interfaces in chains.items():
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b = blockchain.blockchains.get(chain_id)
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if b is None: continue
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name = b.get_name()
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if n_chains > 1:
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x = QTreeWidgetItem([name + '@%d'%b.get_max_forkpoint(), '%d'%b.height()])
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x.setData(0, self.ITEMTYPE_ROLE, self.ItemType.CHAIN)
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x.setData(0, self.CHAIN_ID_ROLE, b.get_id())
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else:
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x = connected_servers_item
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for i in interfaces:
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item = QTreeWidgetItem([f"{i.server.to_friendly_name()}", '%d'%i.tip])
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item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.CONNECTED_SERVER)
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item.setData(0, self.SERVER_ADDR_ROLE, i.server)
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item.setToolTip(0, str(i.server))
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if i == network.interface:
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item.setIcon(0, read_QIcon("chevron-right.png"))
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x.addChild(item)
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if n_chains > 1:
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connected_servers_item.addChild(x)
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# disconnected servers
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disconnected_servers_item = QTreeWidgetItem([_("Other known servers"), ""])
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disconnected_servers_item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.TOPLEVEL)
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connected_hosts = set([iface.host for ifaces in chains.values() for iface in ifaces])
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protocol = PREFERRED_NETWORK_PROTOCOL
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for _host, d in sorted(servers.items()):
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if _host in connected_hosts:
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continue
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if _host.endswith('.onion') and not use_tor:
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continue
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port = d.get(protocol)
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if port:
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server = ServerAddr(_host, port, protocol=protocol)
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item = QTreeWidgetItem([server.net_addr_str(), ""])
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item.setData(0, self.ITEMTYPE_ROLE, self.ItemType.DISCONNECTED_SERVER)
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item.setData(0, self.SERVER_ADDR_ROLE, server)
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disconnected_servers_item.addChild(item)
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self.addTopLevelItem(connected_servers_item)
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self.addTopLevelItem(disconnected_servers_item)
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connected_servers_item.setExpanded(True)
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for i in range(connected_servers_item.childCount()):
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connected_servers_item.child(i).setExpanded(True)
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disconnected_servers_item.setExpanded(True)
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# headers
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h = self.header()
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h.setStretchLastSection(False)
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h.setSectionResizeMode(0, QHeaderView.Stretch)
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h.setSectionResizeMode(1, QHeaderView.ResizeToContents)
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super().update()
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class NetworkChoiceLayout(object):
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def __init__(self, network: Network, config: 'SimpleConfig', wizard=False):
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self.network = network
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self.config = config
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self.tor_proxy = None
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self.tabs = tabs = QTabWidget()
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self._proxy_tab = proxy_tab = QWidget()
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blockchain_tab = QWidget()
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tabs.addTab(blockchain_tab, _('Overview'))
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tabs.addTab(proxy_tab, _('Proxy'))
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tabs.currentChanged.connect(self._on_tab_changed)
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fixed_width_hostname = 24 * char_width_in_lineedit()
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fixed_width_port = 6 * char_width_in_lineedit()
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# Proxy tab
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grid = QGridLayout(proxy_tab)
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grid.setSpacing(8)
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# proxy setting
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self.proxy_cb = QCheckBox(_('Use proxy'))
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self.proxy_cb.clicked.connect(self.check_disable_proxy)
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self.proxy_cb.clicked.connect(self.set_proxy)
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self.proxy_mode = QComboBox()
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self.proxy_mode.addItems(['SOCKS4', 'SOCKS5'])
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self.proxy_host = QLineEdit()
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self.proxy_host.setFixedWidth(fixed_width_hostname)
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self.proxy_port = QLineEdit()
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self.proxy_port.setFixedWidth(fixed_width_port)
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self.proxy_user = QLineEdit()
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self.proxy_user.setPlaceholderText(_("Proxy user"))
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self.proxy_password = PasswordLineEdit()
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self.proxy_password.setPlaceholderText(_("Password"))
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self.proxy_password.setFixedWidth(fixed_width_port)
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self.proxy_mode.currentIndexChanged.connect(self.set_proxy)
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self.proxy_host.editingFinished.connect(self.set_proxy)
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self.proxy_port.editingFinished.connect(self.set_proxy)
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self.proxy_user.editingFinished.connect(self.set_proxy)
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self.proxy_password.editingFinished.connect(self.set_proxy)
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self.proxy_mode.currentIndexChanged.connect(self.proxy_settings_changed)
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self.proxy_host.textEdited.connect(self.proxy_settings_changed)
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self.proxy_port.textEdited.connect(self.proxy_settings_changed)
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self.proxy_user.textEdited.connect(self.proxy_settings_changed)
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self.proxy_password.textEdited.connect(self.proxy_settings_changed)
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self.tor_cb = QCheckBox(_("Use Tor Proxy"))
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self.tor_cb.setIcon(read_QIcon("tor_logo.png"))
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self.tor_cb.hide()
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self.tor_cb.clicked.connect(self.use_tor_proxy)
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grid.addWidget(self.tor_cb, 1, 0, 1, 3)
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grid.addWidget(self.proxy_cb, 2, 0, 1, 3)
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grid.addWidget(HelpButton(_('Proxy settings apply to all connections: with Electrum servers, but also with third-party services.')), 2, 4)
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grid.addWidget(self.proxy_mode, 4, 1)
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grid.addWidget(self.proxy_host, 4, 2)
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grid.addWidget(self.proxy_port, 4, 3)
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grid.addWidget(self.proxy_user, 5, 2)
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grid.addWidget(self.proxy_password, 5, 3)
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grid.setRowStretch(7, 1)
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# Blockchain Tab
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grid = QGridLayout(blockchain_tab)
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msg = ' '.join([
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_("Electrum connects to several nodes in order to download block headers and find out the longest blockchain."),
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_("This blockchain is used to verify the transactions sent by your transaction server.")
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])
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self.status_label = QLabel('')
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grid.addWidget(QLabel(_('Status') + ':'), 0, 0)
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grid.addWidget(self.status_label, 0, 1, 1, 3)
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grid.addWidget(HelpButton(msg), 0, 4)
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self.autoconnect_cb = QCheckBox(_('Select server automatically'))
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self.autoconnect_cb.setEnabled(self.config.cv.NETWORK_AUTO_CONNECT.is_modifiable())
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self.autoconnect_cb.clicked.connect(self.set_server)
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self.autoconnect_cb.clicked.connect(self.update)
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msg = ' '.join([
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_("If auto-connect is enabled, Electrum will always use a server that is on the longest blockchain."),
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_("If it is disabled, you have to choose a server you want to use. Electrum will warn you if your server is lagging.")
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])
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grid.addWidget(self.autoconnect_cb, 1, 0, 1, 3)
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grid.addWidget(HelpButton(msg), 1, 4)
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self.server_e = QLineEdit()
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self.server_e.setFixedWidth(fixed_width_hostname + fixed_width_port)
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self.server_e.editingFinished.connect(self.set_server)
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msg = _("Electrum sends your wallet addresses to a single server, in order to receive your transaction history.")
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grid.addWidget(QLabel(_('Server') + ':'), 2, 0)
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grid.addWidget(self.server_e, 2, 1, 1, 3)
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grid.addWidget(HelpButton(msg), 2, 4)
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self.height_label = QLabel('')
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msg = _('This is the height of your local copy of the blockchain.')
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grid.addWidget(QLabel(_('Blockchain') + ':'), 3, 0)
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grid.addWidget(self.height_label, 3, 1)
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grid.addWidget(HelpButton(msg), 3, 4)
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self.split_label = QLabel('')
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grid.addWidget(self.split_label, 4, 0, 1, 3)
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self.nodes_list_widget = NodesListWidget(self)
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grid.addWidget(self.nodes_list_widget, 6, 0, 1, 5)
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vbox = QVBoxLayout()
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vbox.addWidget(tabs)
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self.layout_ = vbox
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# tor detector
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self.td = td = TorDetector()
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td.found_proxy.connect(self.suggest_proxy)
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td.start()
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self.fill_in_proxy_settings()
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self.update()
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def clean_up(self):
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if self.td:
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self.td.found_proxy.disconnect()
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self.td.stop()
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self.td = None
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def check_disable_proxy(self, b):
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if not self.config.cv.NETWORK_PROXY.is_modifiable():
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b = False
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for w in [self.proxy_mode, self.proxy_host, self.proxy_port, self.proxy_user, self.proxy_password]:
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w.setEnabled(b)
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def enable_set_server(self):
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if self.config.cv.NETWORK_SERVER.is_modifiable():
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enabled = not self.autoconnect_cb.isChecked()
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self.server_e.setEnabled(enabled)
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else:
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for w in [self.autoconnect_cb, self.server_e, self.nodes_list_widget]:
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w.setEnabled(False)
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def update(self):
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net_params = self.network.get_parameters()
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server = net_params.server
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auto_connect = net_params.auto_connect
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if not self.server_e.hasFocus():
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self.server_e.setText(server.to_friendly_name())
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self.autoconnect_cb.setChecked(auto_connect)
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height_str = "%d "%(self.network.get_local_height()) + _('blocks')
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self.height_label.setText(height_str)
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self.status_label.setText(self.network.get_status())
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chains = self.network.get_blockchains()
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if len(chains) > 1:
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chain = self.network.blockchain()
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forkpoint = chain.get_max_forkpoint()
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name = chain.get_name()
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msg = _('Chain split detected at block {0}').format(forkpoint) + '\n'
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msg += (_('You are following branch') if auto_connect else _('Your server is on branch'))+ ' ' + name
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msg += ' (%d %s)' % (chain.get_branch_size(), _('blocks'))
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else:
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msg = ''
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self.split_label.setText(msg)
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self.nodes_list_widget.update(network=self.network,
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servers=self.network.get_servers(),
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use_tor=self.tor_cb.isChecked())
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self.enable_set_server()
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def fill_in_proxy_settings(self):
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proxy_config = self.network.get_parameters().proxy
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if not proxy_config:
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proxy_config = {"mode": "none", "host": "localhost", "port": "9050"}
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b = proxy_config.get('mode') != "none"
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self.check_disable_proxy(b)
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if b:
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self.proxy_cb.setChecked(True)
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self.proxy_mode.setCurrentIndex(
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self.proxy_mode.findText(str(proxy_config.get("mode").upper())))
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self.proxy_host.setText(proxy_config.get("host"))
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self.proxy_port.setText(proxy_config.get("port"))
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self.proxy_user.setText(proxy_config.get("user", ""))
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self.proxy_password.setText(proxy_config.get("password", ""))
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def layout(self):
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return self.layout_
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def follow_branch(self, chain_id):
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self.network.run_from_another_thread(self.network.follow_chain_given_id(chain_id))
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self.update()
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def follow_server(self, server: ServerAddr):
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self.network.run_from_another_thread(self.network.follow_chain_given_server(server))
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self.update()
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def accept(self):
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pass
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def set_server(self):
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net_params = self.network.get_parameters()
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try:
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server = ServerAddr.from_str_with_inference(str(self.server_e.text()))
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if not server: raise Exception("failed to parse")
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except Exception:
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return
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net_params = net_params._replace(server=server,
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auto_connect=self.autoconnect_cb.isChecked())
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self.network.run_from_another_thread(self.network.set_parameters(net_params))
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def set_proxy(self):
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net_params = self.network.get_parameters()
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if self.proxy_cb.isChecked():
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proxy = {'mode':str(self.proxy_mode.currentText()).lower(),
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'host':str(self.proxy_host.text()),
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'port':str(self.proxy_port.text()),
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'user':str(self.proxy_user.text()),
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'password':str(self.proxy_password.text())}
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else:
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proxy = None
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self.tor_cb.setChecked(False)
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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()
|