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electrum/electrum/gui/qt/receive_tab.py

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# 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 = WWLabel('')
self.receive_URI_e = ButtonsTextEdit()
self.receive_URI_help = WWLabel('')
self.receive_lightning_e = ButtonsTextEdit()
self.receive_lightning_help = 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)
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
bip21_lightning = lnaddr if self.config.get('bip21_lightning', False) else None
URI = req.get_bip21_URI(lightning=bip21_lightning)
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.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.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: QLabel):
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)
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)