# Copyright (C) 2022 The Electrum developers # Distributed under the MIT software license, see the accompanying # file LICENCE or http://www.opensource.org/licenses/mit-license.php from typing import Optional, TYPE_CHECKING from PyQt5.QtGui import QFont from PyQt5.QtCore import Qt, QSize from PyQt5.QtWidgets import (QComboBox, QLabel, QVBoxLayout, QGridLayout, QLineEdit, QHBoxLayout, QPushButton, QWidget, QSizePolicy, QFrame) from electrum.bitcoin import is_address from electrum.i18n import _ from electrum.util import InvoiceError from electrum.invoices import PR_DEFAULT_EXPIRATION_WHEN_CREATING from electrum.invoices import PR_EXPIRED, pr_expiration_values from electrum.logging import Logger from .amountedit import AmountEdit, BTCAmountEdit, SizedFreezableLineEdit from .qrcodewidget import QRCodeWidget from .util import read_QIcon, ColorScheme, HelpLabel, WWLabel, MessageBoxMixin, MONOSPACE_FONT from .util import ButtonsTextEdit if TYPE_CHECKING: from . import ElectrumGui from .main_window import ElectrumWindow class ReceiveTab(QWidget, MessageBoxMixin, Logger): def __init__(self, window: 'ElectrumWindow'): QWidget.__init__(self, window) Logger.__init__(self) self.window = window self.wallet = window.wallet self.fx = window.fx self.config = window.config # A 4-column grid layout. All the stretch is in the last column. # The exchange rate plugin adds a fiat widget in column 2 self.receive_grid = grid = QGridLayout() grid.setSpacing(8) grid.setColumnStretch(3, 1) self.receive_message_e = SizedFreezableLineEdit(width=400) grid.addWidget(QLabel(_('Description')), 0, 0) grid.addWidget(self.receive_message_e, 0, 1, 1, 4) self.receive_amount_e = BTCAmountEdit(self.window.get_decimal_point) grid.addWidget(QLabel(_('Requested amount')), 1, 0) grid.addWidget(self.receive_amount_e, 1, 1) self.fiat_receive_e = AmountEdit(self.fx.get_currency if self.fx else '') if not self.fx or not self.fx.is_enabled(): self.fiat_receive_e.setVisible(False) grid.addWidget(self.fiat_receive_e, 1, 2, Qt.AlignLeft) self.window.connect_fields(self.receive_amount_e, self.fiat_receive_e) self.expires_combo = QComboBox() evl = sorted(pr_expiration_values.items()) evl_keys = [i[0] for i in evl] evl_values = [i[1] for i in evl] default_expiry = self.config.get('request_expiry', PR_DEFAULT_EXPIRATION_WHEN_CREATING) try: i = evl_keys.index(default_expiry) except ValueError: i = 0 self.expires_combo.addItems(evl_values) self.expires_combo.setCurrentIndex(i) def on_expiry(i): self.config.set_key('request_expiry', evl_keys[i]) self.expires_combo.currentIndexChanged.connect(on_expiry) msg = ''.join([ _('Expiration date of your request.'), ' ', _('This information is seen by the recipient if you send them a signed payment request.'), '\n\n', _('For on-chain requests, the address gets reserved until expiration. After that, it might get reused.'), ' ', _('The bitcoin address never expires and will always be part of this electrum wallet.'), ' ', _('You can reuse a bitcoin address any number of times but it is not good for your privacy.'), '\n\n', _('For Lightning requests, payments will not be accepted after the expiration.'), ]) grid.addWidget(HelpLabel(_('Expires after') + ' (?)', msg), 2, 0) grid.addWidget(self.expires_combo, 2, 1) self.expires_label = QLineEdit('') self.expires_label.setReadOnly(1) self.expires_label.setFocusPolicy(Qt.NoFocus) self.expires_label.hide() grid.addWidget(self.expires_label, 2, 1) self.clear_invoice_button = QPushButton(_('Clear')) self.clear_invoice_button.clicked.connect(self.do_clear) self.create_invoice_button = QPushButton(_('Create Request')) self.create_invoice_button.clicked.connect(lambda: self.create_invoice()) self.receive_buttons = buttons = QHBoxLayout() buttons.addStretch(1) buttons.addWidget(self.clear_invoice_button) buttons.addWidget(self.create_invoice_button) grid.addLayout(buttons, 4, 0, 1, -1) self.receive_address_e = ButtonsTextEdit() self.receive_address_help_text = WWLabel('') vbox = QVBoxLayout() vbox.addWidget(self.receive_address_help_text) self.receive_address_help = FramedWidget() self.receive_address_help.setVisible(False) self.receive_address_help.setLayout(vbox) self.receive_URI_e = ButtonsTextEdit() self.receive_URI_help = WWLabel('') self.receive_lightning_e = ButtonsTextEdit() self.receive_lightning_help_text = WWLabel('') self.receive_rebalance_button = QPushButton('Rebalance') self.receive_rebalance_button.suggestion = None def on_receive_rebalance(): if self.receive_rebalance_button.suggestion: chan1, chan2, delta = self.receive_rebalance_button.suggestion self.window.rebalance_dialog(chan1, chan2, amount_sat=delta) self.receive_rebalance_button.clicked.connect(on_receive_rebalance) self.receive_swap_button = QPushButton('Swap') self.receive_swap_button.suggestion = None def on_receive_swap(): if self.receive_swap_button.suggestion: chan, swap_recv_amount_sat = self.receive_swap_button.suggestion self.window.run_swap_dialog(is_reverse=True, recv_amount_sat=swap_recv_amount_sat, channels=[chan]) self.receive_swap_button.clicked.connect(on_receive_swap) buttons = QHBoxLayout() buttons.addWidget(self.receive_rebalance_button) buttons.addWidget(self.receive_swap_button) vbox = QVBoxLayout() vbox.addWidget(self.receive_lightning_help_text) vbox.addLayout(buttons) self.receive_lightning_help = FramedWidget() self.receive_lightning_help.setVisible(False) self.receive_lightning_help.setLayout(vbox) self.receive_address_qr = QRCodeWidget() self.receive_URI_qr = QRCodeWidget() self.receive_lightning_qr = QRCodeWidget() for e in [self.receive_address_e, self.receive_URI_e, self.receive_lightning_e]: e.setFont(QFont(MONOSPACE_FONT)) e.addCopyButton() e.setReadOnly(True) self.receive_lightning_e.textChanged.connect(self.update_receive_widgets) self.receive_address_widget = ReceiveTabWidget(self, self.receive_address_e, self.receive_address_qr, self.receive_address_help) self.receive_URI_widget = ReceiveTabWidget(self, self.receive_URI_e, self.receive_URI_qr, self.receive_URI_help) self.receive_lightning_widget = ReceiveTabWidget(self, self.receive_lightning_e, self.receive_lightning_qr, self.receive_lightning_help) from .util import VTabWidget self.receive_tabs = VTabWidget() self.receive_tabs.setMinimumHeight(ReceiveTabWidget.min_size.height()) #self.receive_tabs.setMinimumHeight(ReceiveTabWidget.min_size.height() + 4) # for margins self.receive_tabs.addTab(self.receive_URI_widget, read_QIcon("link.png"), _('URI')) self.receive_tabs.addTab(self.receive_address_widget, read_QIcon("bitcoin.png"), _('Address')) self.receive_tabs.addTab(self.receive_lightning_widget, read_QIcon("lightning.png"), _('Lightning')) self.receive_tabs.currentChanged.connect(self.update_receive_qr_window) self.receive_tabs.setCurrentIndex(self.config.get('receive_tabs_index', 0)) self.receive_tabs.currentChanged.connect(lambda i: self.config.set_key('receive_tabs_index', i)) receive_tabs_sp = QSizePolicy(QSizePolicy.MinimumExpanding, QSizePolicy.MinimumExpanding) receive_tabs_sp.setRetainSizeWhenHidden(True) self.receive_tabs.setSizePolicy(receive_tabs_sp) self.receive_tabs.setVisible(False) self.receive_requests_label = QLabel(_('Receive queue')) # with QDarkStyle, this label may partially cover the qrcode widget. # setMaximumWidth prevents that self.receive_requests_label.setMaximumWidth(400) from .request_list import RequestList self.request_list = RequestList(self) # layout vbox_g = QVBoxLayout() vbox_g.addLayout(grid) vbox_g.addStretch() hbox = QHBoxLayout() hbox.addLayout(vbox_g) hbox.addStretch() hbox.addWidget(self.receive_tabs) self.searchable_list = self.request_list vbox = QVBoxLayout(self) vbox.addLayout(hbox) vbox.addStretch() vbox.addWidget(self.receive_requests_label) vbox.addWidget(self.request_list) vbox.setStretchFactor(hbox, 40) vbox.setStretchFactor(self.request_list, 60) self.request_list.update() # after parented and put into a layout, can update without flickering def toggle_receive_qr(self, e): if e.button() != Qt.LeftButton: return b = not self.config.get('receive_qr_visible', False) self.config.set_key('receive_qr_visible', b) self.update_receive_widgets() def update_receive_widgets(self): b = self.config.get('receive_qr_visible', False) self.receive_URI_widget.update_visibility(b) self.receive_address_widget.update_visibility(b) self.receive_lightning_widget.update_visibility(b) def update_current_request(self): key = self.request_list.get_current_key() req = self.wallet.get_request(key) if key else None if req is None: self.receive_URI_e.setText('') self.receive_lightning_e.setText('') self.receive_address_e.setText('') return addr = req.get_address() or '' amount_sat = req.get_amount_sat() or 0 address_help = '' if addr else _('Amount too small to be received onchain') URI_help = '' lnaddr = req.lightning_invoice URI = self.wallet.get_request_URI(req) or '' lightning_online = self.wallet.lnworker and self.wallet.lnworker.num_peers() > 0 can_receive_lightning = self.wallet.lnworker and amount_sat <= self.wallet.lnworker.num_sats_can_receive() has_expired = self.wallet.get_request_status(key) == PR_EXPIRED if has_expired: URI_help = ln_help = address_help = _('This request has expired') URI = lnaddr = address = '' can_rebalance = False can_swap = False elif lnaddr is None: ln_help = _('This request does not have a Lightning invoice.') lnaddr = '' can_rebalance = False can_swap = False elif not lightning_online: ln_help = _('You must be online to receive Lightning payments.') lnaddr = '' can_rebalance = False can_swap = False elif not can_receive_lightning: self.receive_rebalance_button.suggestion = self.wallet.lnworker.suggest_rebalance_to_receive(amount_sat) self.receive_swap_button.suggestion = self.wallet.lnworker.suggest_swap_to_receive(amount_sat) can_rebalance = bool(self.receive_rebalance_button.suggestion) can_swap = bool(self.receive_swap_button.suggestion) lnaddr = '' ln_help = _('You do not have the capacity to receive that amount with Lightning.') if can_rebalance: ln_help += '\n\n' + _('You may have that capacity if you rebalance your channels.') elif can_swap: ln_help += '\n\n' + _('You may have that capacity if you swap some of your funds.') else: ln_help = '' can_rebalance = False can_swap = False self.receive_rebalance_button.setVisible(can_rebalance) self.receive_swap_button.setVisible(can_swap) self.receive_rebalance_button.setEnabled(can_rebalance and self.window.num_tasks() == 0) self.receive_swap_button.setEnabled(can_swap and self.window.num_tasks() == 0) icon_name = "lightning.png" if lnaddr else "lightning_disconnected.png" self.receive_tabs.setTabIcon(2, read_QIcon(icon_name)) # encode lightning invoices as uppercase so QR encoding can use # alphanumeric mode; resulting in smaller QR codes lnaddr_qr = lnaddr.upper() self.receive_address_e.setText(addr) self.update_receive_address_styling() self.receive_address_qr.setData(addr) self.receive_address_help_text.setText(address_help) self.receive_URI_e.setText(URI) self.receive_URI_qr.setData(URI) self.receive_URI_help.setText(URI_help) self.receive_lightning_e.setText(lnaddr) # TODO maybe prepend "lightning:" ?? self.receive_lightning_help_text.setText(ln_help) self.receive_lightning_qr.setData(lnaddr_qr) # macOS hack (similar to #4777) self.receive_lightning_e.repaint() self.receive_URI_e.repaint() self.receive_address_e.repaint() # always show self.receive_tabs.setVisible(True) self.update_receive_qr_window() def update_receive_qr_window(self): if self.window.qr_window and self.window.qr_window.isVisible(): i = self.receive_tabs.currentIndex() if i == 0: data = self.receive_URI_qr.data elif i == 1: data = self.receive_address_qr.data else: data = self.receive_lightning_qr.data self.window.qr_window.qrw.setData(data) def sign_payment_request(self, addr): alias = self.config.get('alias') if alias and self.wallet.contacts.alias_info: alias_addr, alias_name, validated = self.wallet.contacts.alias_info if alias_addr: if self.wallet.is_mine(alias_addr): msg = _('This payment request will be signed.') + '\n' + _('Please enter your password') password = None if self.wallet.has_keystore_encryption(): password = self.window.password_dialog(msg) if not password: return try: self.wallet.sign_payment_request(addr, alias, alias_addr, password) except Exception as e: self.show_error(repr(e)) return else: return def create_invoice(self): amount_sat = self.receive_amount_e.get_amount() message = self.receive_message_e.text() expiry = self.config.get('request_expiry', PR_DEFAULT_EXPIRATION_WHEN_CREATING) if amount_sat and amount_sat < self.wallet.dust_threshold(): address = None if not self.wallet.has_lightning(): return else: address = self.get_bitcoin_address_for_request(amount_sat) if not address: return self.window.address_list.update() # generate even if we cannot receive try: key = self.wallet.create_request(amount_sat, message, expiry, address) except InvoiceError as e: self.show_error(_('Error creating payment request') + ':\n' + str(e)) return except Exception as e: self.logger.exception('Error adding payment request') self.show_error(_('Error adding payment request') + ':\n' + repr(e)) return self.sign_payment_request(address) assert key is not None self.window.address_list.refresh_all() self.request_list.update() self.request_list.set_current_key(key) # clear request fields self.receive_amount_e.setText('') self.receive_message_e.setText('') # copy to clipboard r = self.wallet.get_request(key) content = r.lightning_invoice if r.is_lightning() else r.get_address() title = _('Invoice') if r.is_lightning() else _('Address') self.window.do_copy(content, title=title) def get_bitcoin_address_for_request(self, amount) -> Optional[str]: addr = self.wallet.get_unused_address() if addr is None: if not self.wallet.is_deterministic(): # imported wallet msg = [ _('No more addresses in your wallet.'), ' ', _('You are using a non-deterministic wallet, which cannot create new addresses.'), ' ', _('If you want to create new addresses, use a deterministic wallet instead.'), '\n\n', _('Creating a new payment request will reuse one of your addresses and overwrite an existing request. Continue anyway?'), ] if not self.question(''.join(msg)): return addr = self.wallet.get_receiving_address() else: # deterministic wallet if not self.question(_("Warning: The next address will not be recovered automatically if you restore your wallet from seed; you may need to add it manually.\n\nThis occurs because you have too many unused addresses in your wallet. To avoid this situation, use the existing addresses first.\n\nCreate anyway?")): return addr = self.wallet.create_new_address(False) return addr def do_clear(self): self.receive_address_e.setText('') self.receive_URI_e.setText('') self.receive_lightning_e.setText('') self.receive_tabs.setVisible(False) self.receive_message_e.setText('') self.receive_amount_e.setAmount(None) self.expires_label.hide() self.expires_combo.show() self.request_list.clearSelection() def update_receive_address_styling(self): addr = str(self.receive_address_e.text()) if is_address(addr) and self.wallet.adb.is_used(addr): self.receive_address_e.setStyleSheet(ColorScheme.RED.as_stylesheet(True)) self.receive_address_e.setToolTip(_("This address has already been used. " "For better privacy, do not reuse it for new payments.")) else: self.receive_address_e.setStyleSheet("") self.receive_address_e.setToolTip("") class ReceiveTabWidget(QWidget): min_size = QSize(200, 200) def __init__(self, receive_tab: 'ReceiveTab', textedit: QWidget, qr: QWidget, help_widget: QWidget): self.textedit = textedit self.qr = qr self.help_widget = help_widget QWidget.__init__(self) for w in [textedit, qr, help_widget]: w.setMinimumSize(self.min_size) for w in [textedit, qr]: w.mousePressEvent = receive_tab.toggle_receive_qr tooltip = _('Click to switch between text and QR code view') w.setToolTip(tooltip) textedit.setFocusPolicy(Qt.NoFocus) if isinstance(help_widget, QLabel): help_widget.setFrameStyle(QFrame.StyledPanel) help_widget.setStyleSheet("QLabel {border:1px solid gray; border-radius:2px; }") hbox = QHBoxLayout() hbox.setContentsMargins(0, 0, 0, 0) hbox.addWidget(textedit) hbox.addWidget(help_widget) hbox.addWidget(qr) self.setLayout(hbox) def update_visibility(self, is_qr): if str(self.textedit.text()): self.help_widget.setVisible(False) self.textedit.setVisible(not is_qr) self.qr.setVisible(is_qr) else: self.help_widget.setVisible(True) self.textedit.setVisible(False) self.qr.setVisible(False) class FramedWidget(QFrame): def __init__(self): QFrame.__init__(self) self.setFrameStyle(QFrame.StyledPanel) self.setStyleSheet("FramedWidget {border:1px solid gray; border-radius:2px; }")