mirror of
https://github.com/LBRYFoundation/LBRY-Vault.git
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271 lines
11 KiB
Python
271 lines
11 KiB
Python
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (2019) The Electrum Developers
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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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from decimal import Decimal
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from typing import TYPE_CHECKING, Optional, Union
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from PyQt5.QtWidgets import QVBoxLayout, QLabel, QGridLayout, QPushButton, QLineEdit
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from electrum.i18n import _
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from electrum.util import NotEnoughFunds, NoDynamicFeeEstimates
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from electrum.plugin import run_hook
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from electrum.transaction import Transaction, PartialTransaction
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from electrum.simple_config import FEERATE_WARNING_HIGH_FEE, FEE_RATIO_HIGH_WARNING
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from electrum.wallet import InternalAddressCorruption
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from .util import (WindowModalDialog, ColorScheme, HelpLabel, Buttons, CancelButton,
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BlockingWaitingDialog, PasswordLineEdit)
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from .fee_slider import FeeSlider, FeeComboBox
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if TYPE_CHECKING:
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from .main_window import ElectrumWindow
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class TxEditor:
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def __init__(self, *, window: 'ElectrumWindow', make_tx,
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output_value: Union[int, str] = None, is_sweep: bool):
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self.main_window = window
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self.make_tx = make_tx
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self.output_value = output_value
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self.tx = None # type: Optional[PartialTransaction]
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self.config = window.config
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self.wallet = window.wallet
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self.not_enough_funds = False
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self.no_dynfee_estimates = False
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self.needs_update = False
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self.password_required = self.wallet.has_keystore_encryption() and not is_sweep
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self.main_window.gui_object.timer.timeout.connect(self.timer_actions)
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def timer_actions(self):
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if self.needs_update:
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self.update_tx()
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self.update()
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self.needs_update = False
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def fee_slider_callback(self, dyn, pos, fee_rate):
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if dyn:
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if self.config.use_mempool_fees():
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self.config.set_key('depth_level', pos, False)
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else:
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self.config.set_key('fee_level', pos, False)
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else:
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self.config.set_key('fee_per_kb', fee_rate, False)
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self.needs_update = True
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def get_fee_estimator(self):
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return None
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def update_tx(self, *, fallback_to_zero_fee: bool = False):
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fee_estimator = self.get_fee_estimator()
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try:
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self.tx = self.make_tx(fee_estimator)
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self.not_enough_funds = False
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self.no_dynfee_estimates = False
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except NotEnoughFunds:
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self.not_enough_funds = True
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self.tx = None
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if fallback_to_zero_fee:
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try:
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self.tx = self.make_tx(0)
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except BaseException:
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return
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else:
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return
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except NoDynamicFeeEstimates:
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self.no_dynfee_estimates = True
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self.tx = None
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try:
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self.tx = self.make_tx(0)
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except BaseException:
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return
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except InternalAddressCorruption as e:
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self.tx = None
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self.main_window.show_error(str(e))
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raise
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use_rbf = bool(self.config.get('use_rbf', True))
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if use_rbf:
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self.tx.set_rbf(True)
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def have_enough_funds_assuming_zero_fees(self) -> bool:
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try:
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tx = self.make_tx(0)
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except NotEnoughFunds:
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return False
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else:
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return True
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class ConfirmTxDialog(TxEditor, WindowModalDialog):
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# set fee and return password (after pw check)
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def __init__(self, *, window: 'ElectrumWindow', make_tx, output_value: Union[int, str], is_sweep: bool):
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TxEditor.__init__(self, window=window, make_tx=make_tx, output_value=output_value, is_sweep=is_sweep)
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WindowModalDialog.__init__(self, window, _("Confirm Transaction"))
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vbox = QVBoxLayout()
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self.setLayout(vbox)
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grid = QGridLayout()
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vbox.addLayout(grid)
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self.amount_label = QLabel('')
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grid.addWidget(QLabel(_("Amount to be sent") + ": "), 0, 0)
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grid.addWidget(self.amount_label, 0, 1)
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msg = _('Bitcoin transactions are in general not free. A transaction fee is paid by the sender of the funds.') + '\n\n'\
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+ _('The amount of fee can be decided freely by the sender. However, transactions with low fees take more time to be processed.') + '\n\n'\
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+ _('A suggested fee is automatically added to this field. You may override it. The suggested fee increases with the size of the transaction.')
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self.fee_label = QLabel('')
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grid.addWidget(HelpLabel(_("Mining fee") + ": ", msg), 1, 0)
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grid.addWidget(self.fee_label, 1, 1)
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self.extra_fee_label = QLabel(_("Additional fees") + ": ")
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self.extra_fee_label.setVisible(False)
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self.extra_fee_value = QLabel('')
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self.extra_fee_value.setVisible(False)
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grid.addWidget(self.extra_fee_label, 2, 0)
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grid.addWidget(self.extra_fee_value, 2, 1)
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self.fee_slider = FeeSlider(self, self.config, self.fee_slider_callback)
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self.fee_combo = FeeComboBox(self.fee_slider)
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grid.addWidget(HelpLabel(_("Fee rate") + ": ", self.fee_combo.help_msg), 5, 0)
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grid.addWidget(self.fee_slider, 5, 1)
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grid.addWidget(self.fee_combo, 5, 2)
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self.message_label = QLabel(self.default_message())
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grid.addWidget(self.message_label, 6, 0, 1, -1)
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self.pw_label = QLabel(_('Password'))
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self.pw_label.setVisible(self.password_required)
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self.pw = PasswordLineEdit()
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self.pw.setVisible(self.password_required)
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grid.addWidget(self.pw_label, 8, 0)
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grid.addWidget(self.pw, 8, 1, 1, -1)
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self.preview_button = QPushButton(_('Advanced'))
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self.preview_button.clicked.connect(self.on_preview)
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grid.addWidget(self.preview_button, 0, 2)
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self.send_button = QPushButton(_('Send'))
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self.send_button.clicked.connect(self.on_send)
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self.send_button.setDefault(True)
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vbox.addLayout(Buttons(CancelButton(self), self.send_button))
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BlockingWaitingDialog(window, _("Preparing transaction..."), self.update_tx)
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self.update()
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self.is_send = False
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def default_message(self):
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return _('Enter your password to proceed') if self.password_required else _('Click Send to proceed')
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def on_preview(self):
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self.accept()
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def run(self):
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cancelled = not self.exec_()
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password = self.pw.text() or None
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return cancelled, self.is_send, password, self.tx
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def on_send(self):
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password = self.pw.text() or None
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if self.password_required:
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if password is None:
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self.main_window.show_error(_("Password required"), parent=self)
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return
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try:
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self.wallet.check_password(password)
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except Exception as e:
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self.main_window.show_error(str(e), parent=self)
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return
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self.is_send = True
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self.accept()
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def toggle_send_button(self, enable: bool, *, message: str = None):
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if message is None:
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self.message_label.setStyleSheet(None)
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self.message_label.setText(self.default_message())
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else:
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self.message_label.setStyleSheet(ColorScheme.RED.as_stylesheet())
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self.message_label.setText(message)
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self.pw.setEnabled(enable)
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self.send_button.setEnabled(enable)
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def _update_amount_label(self):
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tx = self.tx
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if self.output_value == '!':
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if tx:
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amount = tx.output_value()
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amount_str = self.main_window.format_amount_and_units(amount)
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else:
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amount_str = "max"
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else:
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amount = self.output_value
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amount_str = self.main_window.format_amount_and_units(amount)
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self.amount_label.setText(amount_str)
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def update(self):
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tx = self.tx
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self._update_amount_label()
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if self.not_enough_funds:
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text = _("Not enough funds")
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c, u, x = self.wallet.get_frozen_balance()
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if c+u+x:
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text += " ({} {} {})".format(
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self.main_window.format_amount(c + u + x).strip(), self.main_window.base_unit(), _("are frozen")
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)
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self.toggle_send_button(False, message=text)
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return
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if not tx:
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return
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fee = tx.get_fee()
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self.fee_label.setText(self.main_window.format_amount_and_units(fee))
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x_fee = run_hook('get_tx_extra_fee', self.wallet, tx)
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if x_fee:
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x_fee_address, x_fee_amount = x_fee
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self.extra_fee_label.setVisible(True)
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self.extra_fee_value.setVisible(True)
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self.extra_fee_value.setText(self.main_window.format_amount_and_units(x_fee_amount))
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amount = tx.output_value() if self.output_value == '!' else self.output_value
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feerate = Decimal(fee) / tx.estimated_size() # sat/byte
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fee_ratio = Decimal(fee) / amount if amount else 1
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if feerate < self.wallet.relayfee() / 1000:
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msg = '\n'.join([
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_("This transaction requires a higher fee, or it will not be propagated by your current server"),
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_("Try to raise your transaction fee, or use a server with a lower relay fee.")
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])
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self.toggle_send_button(False, message=msg)
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elif fee_ratio >= FEE_RATIO_HIGH_WARNING:
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self.toggle_send_button(True,
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message=_('Warning') + ': ' + _("The fee for this transaction seems unusually high.")
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+ f'\n({fee_ratio*100:.2f}% of amount)')
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elif feerate > FEERATE_WARNING_HIGH_FEE / 1000:
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self.toggle_send_button(True,
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message=_('Warning') + ': ' + _("The fee for this transaction seems unusually high.")
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+ f'\n(feerate: {feerate:.2f} sat/byte)')
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else:
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self.toggle_send_button(True)
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