# -*- coding: utf-8 -*- import traceback import asyncio from enum import IntEnum from PyQt5 import QtCore, QtWidgets, QtGui from PyQt5.QtCore import Qt from PyQt5.QtWidgets import QMenu, QHBoxLayout, QLabel, QVBoxLayout, QGridLayout, QLineEdit from electrum.util import inv_dict, bh2u, bfh from electrum.i18n import _ from electrum.lnchannel import Channel from electrum.wallet import Abstract_Wallet from electrum.lnutil import LOCAL, REMOTE, ConnStringFormatError, format_short_channel_id from .util import MyTreeView, WindowModalDialog, Buttons, OkButton, CancelButton, EnterButton, WWLabel, WaitingDialog from .amountedit import BTCAmountEdit from .channel_details import ChannelDetailsDialog ROLE_CHANNEL_ID = Qt.UserRole class ChannelsList(MyTreeView): update_rows = QtCore.pyqtSignal(Abstract_Wallet) update_single_row = QtCore.pyqtSignal(Channel) class Columns(IntEnum): SHORT_CHANID = 0 NODE_ID = 1 LOCAL_BALANCE = 2 REMOTE_BALANCE = 3 CHANNEL_STATUS = 4 headers = { Columns.SHORT_CHANID: _('Short Channel ID'), Columns.NODE_ID: _('Node ID'), Columns.LOCAL_BALANCE: _('Local'), Columns.REMOTE_BALANCE: _('Remote'), Columns.CHANNEL_STATUS: _('Status'), } def __init__(self, parent): super().__init__(parent, self.create_menu, stretch_column=self.Columns.NODE_ID, editable_columns=[]) self.setModel(QtGui.QStandardItemModel(self)) self.main_window = parent self.update_rows.connect(self.do_update_rows) self.update_single_row.connect(self.do_update_single_row) self.network = self.parent.network self.lnworker = self.parent.wallet.lnworker def format_fields(self, chan): labels = {} for subject in (REMOTE, LOCAL): bal_minus_htlcs = chan.balance_minus_outgoing_htlcs(subject)//1000 label = self.parent.format_amount(bal_minus_htlcs) other = subject.inverted() bal_other = chan.balance(other)//1000 bal_minus_htlcs_other = chan.balance_minus_outgoing_htlcs(other)//1000 if bal_other != bal_minus_htlcs_other: label += ' (+' + self.parent.format_amount(bal_other - bal_minus_htlcs_other) + ')' labels[subject] = label return [ format_short_channel_id(chan.short_channel_id), bh2u(chan.node_id), labels[LOCAL], labels[REMOTE], chan.get_state() ] def on_success(self, txid): self.main_window.show_error('Channel closed' + '\n' + txid) def on_failure(self, exc_info): type_, e, tb = exc_info traceback.print_tb(tb) self.main_window.show_error('Failed to close channel:\n{}'.format(repr(e))) def close_channel(self, channel_id): def task(): coro = self.lnworker.close_channel(channel_id) return self.network.run_from_another_thread(coro) WaitingDialog(self, 'please wait..', task, self.on_success, self.on_failure) def force_close(self, channel_id): def task(): coro = self.lnworker.force_close_channel(channel_id) return self.network.run_from_another_thread(coro) if self.parent.question('Force-close channel?\nReclaimed funds will not be immediately available.'): WaitingDialog(self, 'please wait..', task, self.on_success, self.on_failure) def remove_channel(self, channel_id): if self.main_window.question(_('Are you sure you want to delete this channel? This will purge associated transactions from your wallet history.')): self.lnworker.remove_channel(channel_id) def create_menu(self, position): menu = QMenu() idx = self.selectionModel().currentIndex() item = self.model().itemFromIndex(idx) if not item: return channel_id = idx.sibling(idx.row(), self.Columns.NODE_ID).data(ROLE_CHANNEL_ID) chan = self.lnworker.channels[channel_id] menu.addAction(_("Details..."), lambda: self.details(channel_id)) self.add_copy_menu(menu, idx) if not chan.is_closed(): menu.addAction(_("Close channel"), lambda: self.close_channel(channel_id)) menu.addAction(_("Force-close channel"), lambda: self.force_close(channel_id)) else: menu.addAction(_("Remove"), lambda: self.remove_channel(channel_id)) menu.exec_(self.viewport().mapToGlobal(position)) def details(self, channel_id): assert self.parent.wallet ChannelDetailsDialog(self.parent, channel_id).show() @QtCore.pyqtSlot(Channel) def do_update_single_row(self, chan): for row in range(self.model().rowCount()): item = self.model().item(row, self.Columns.NODE_ID) if item.data(ROLE_CHANNEL_ID) == chan.channel_id: for column, v in enumerate(self.format_fields(chan)): self.model().item(row, column).setData(v, QtCore.Qt.DisplayRole) @QtCore.pyqtSlot(Abstract_Wallet) def do_update_rows(self, wallet): if wallet != self.parent.wallet: return self.model().clear() self.update_headers(self.headers) for chan in self.parent.wallet.lnworker.channels.values(): items = [QtGui.QStandardItem(x) for x in self.format_fields(chan)] self.set_editability(items) items[self.Columns.NODE_ID].setData(chan.channel_id, ROLE_CHANNEL_ID) self.model().insertRow(0, items) def get_toolbar(self): h = QHBoxLayout() h.addStretch() h.addWidget(EnterButton(_('Open Channel'), self.new_channel_dialog)) return h def statistics_dialog(self): channel_db = self.parent.network.channel_db capacity = self.parent.format_amount(channel_db.capacity()) + ' '+ self.parent.base_unit() d = WindowModalDialog(self.parent, _('Lightning Network Statistics')) d.setMinimumWidth(400) vbox = QVBoxLayout(d) h = QGridLayout() h.addWidget(QLabel(_('Nodes') + ':'), 0, 0) h.addWidget(QLabel('{}'.format(channel_db.num_nodes)), 0, 1) h.addWidget(QLabel(_('Channels') + ':'), 1, 0) h.addWidget(QLabel('{}'.format(channel_db.num_channels)), 1, 1) h.addWidget(QLabel(_('Capacity') + ':'), 2, 0) h.addWidget(QLabel(capacity), 2, 1) vbox.addLayout(h) vbox.addLayout(Buttons(OkButton(d))) d.exec_() def new_channel_dialog(self): lnworker = self.parent.wallet.lnworker d = WindowModalDialog(self.parent, _('Open Channel')) d.setMinimumWidth(700) vbox = QVBoxLayout(d) h = QGridLayout() local_nodeid = QLineEdit() local_nodeid.setText(bh2u(lnworker.node_keypair.pubkey)) local_nodeid.setReadOnly(True) local_nodeid.setCursorPosition(0) remote_nodeid = QLineEdit() local_amt_inp = BTCAmountEdit(self.parent.get_decimal_point) local_amt_inp.setAmount(200000) push_amt_inp = BTCAmountEdit(self.parent.get_decimal_point) push_amt_inp.setAmount(0) h.addWidget(QLabel(_('Your Node ID')), 0, 0) h.addWidget(local_nodeid, 0, 1) h.addWidget(QLabel(_('Remote Node ID or connection string or invoice')), 1, 0) h.addWidget(remote_nodeid, 1, 1) h.addWidget(QLabel('Local amount'), 2, 0) h.addWidget(local_amt_inp, 2, 1) h.addWidget(QLabel('Push amount'), 3, 0) h.addWidget(push_amt_inp, 3, 1) vbox.addLayout(h) ok_button = OkButton(d) ok_button.setDefault(True) vbox.addLayout(Buttons(CancelButton(d), ok_button)) suggestion = lnworker.suggest_peer() or b'' remote_nodeid.setText(bh2u(suggestion)) remote_nodeid.setCursorPosition(0) if not d.exec_(): return local_amt = local_amt_inp.get_amount() push_amt = push_amt_inp.get_amount() connect_contents = str(remote_nodeid.text()).strip() self.parent.open_channel(connect_contents, local_amt, push_amt)