#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2013 ecdsa@github
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import six
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from electrum.i18n import _
from .util import *
from .qrtextedit import ShowQRTextEdit, ScanQRTextEdit
def seed_warning_msg(seed):
return ''.join([
"<p>",
_("Please save these %d words on paper (order is important). "),
_("This seed will allow you to recover your wallet in case "
"of computer failure."),
"</p>",
"<b>" + _("WARNING") + ":</b>",
"<ul>",
"<li>" + _("Never disclose your seed.") + "</li>",
"<li>" + _("Never type it on a website.") + "</li>",
"<li>" + _("Do not store it electronically.") + "</li>",
"</ul>"
]) % len(seed.split())
class SeedLayout(QVBoxLayout):
#options
is_bip39 = False
is_ext = False
def seed_options(self):
dialog = QDialog()
vbox = QVBoxLayout(dialog)
if 'ext' in self.options:
cb_ext = QCheckBox(_('Extend this seed with custom words'))
cb_ext.setChecked(self.is_ext)
vbox.addWidget(cb_ext)
if 'bip39' in self.options:
def f(b):
self.is_seed = (lambda x: bool(x)) if b else self.saved_is_seed
self.on_edit()
self.is_bip39 = b
if b:
msg = ' '.join([
'<b>' + _('Warning') + ':</b> ',
_('BIP39 seeds can be imported in Electrum, so that users can access funds locked in other wallets.'),
_('However, we do not generate BIP39 seeds, because they do not meet our safety standard.'),
_('BIP39 seeds do not include a version number, which compromises compatibility with future software.'),
_('We do not guarantee that BIP39 imports will always be supported in Electrum.'),
])
else:
msg = ''
self.seed_warning.setText(msg)
cb_bip39 = QCheckBox(_('BIP39 seed'))
cb_bip39.toggled.connect(f)
cb_bip39.setChecked(self.is_bip39)
vbox.addWidget(cb_bip39)
vbox.addLayout(Buttons(OkButton(dialog)))
if not dialog.exec_():
return None
self.is_ext = cb_ext.isChecked() if 'ext' in self.options else False
self.is_bip39 = cb_bip39.isChecked() if 'bip39' in self.options else False
def __init__(self, seed=None, title=None, icon=True, msg=None, options=None, is_seed=None, passphrase=None, parent=None):
QVBoxLayout.__init__(self)
self.parent = parent
self.options = options
if title:
self.addWidget(WWLabel(title))
if seed:
self.seed_e = ShowQRTextEdit()
self.seed_e.setText(seed)
else:
self.seed_e = ScanQRTextEdit()
self.seed_e.setTabChangesFocus(True)
self.is_seed = is_seed
self.saved_is_seed = self.is_seed
self.seed_e.textChanged.connect(self.on_edit)
self.seed_e.setMaximumHeight(75)
hbox = QHBoxLayout()
if icon:
logo = QLabel()
logo.setPixmap(QPixmap(":icons/seed.png").scaledToWidth(64))
logo.setMaximumWidth(60)
hbox.addWidget(logo)
hbox.addWidget(self.seed_e)
self.addLayout(hbox)
hbox = QHBoxLayout()
hbox.addStretch(1)
self.seed_type_label = QLabel('')
hbox.addWidget(self.seed_type_label)
if options:
opt_button = EnterButton(_('Options'), self.seed_options)
hbox.addWidget(opt_button)
self.addLayout(hbox)
if passphrase:
hbox = QHBoxLayout()
passphrase_e = QLineEdit()
passphrase_e.setText(passphrase)
passphrase_e.setReadOnly(True)
hbox.addWidget(QLabel(_("Your seed extension is") + ':'))
hbox.addWidget(passphrase_e)
self.addLayout(hbox)
self.addStretch(1)
self.seed_warning = WWLabel('')
if msg:
self.seed_warning.setText(seed_warning_msg(seed))
self.addWidget(self.seed_warning)
def get_seed(self):
text = self.seed_e.text()
return ' '.join(text.split())
def on_edit(self):
from electrum.bitcoin import seed_type
s = self.get_seed()
b = self.is_seed(s)
if not self.is_bip39:
t = seed_type(s)
label = _('Seed Type') + ': ' + t if t else ''
else:
from electrum.keystore import bip39_is_checksum_valid
is_checksum, is_wordlist = bip39_is_checksum_valid(s)
status = ('checksum: ' + ('ok' if is_checksum else 'failed')) if is_wordlist else 'unknown wordlist'
label = 'BIP39' + ' (%s)'%status
self.seed_type_label.setText(label)
self.parent.next_button.setEnabled(b)
class KeysLayout(QVBoxLayout):
def __init__(self, parent=None, title=None, is_valid=None):
QVBoxLayout.__init__(self)
self.parent = parent
self.is_valid = is_valid
self.text_e = ScanQRTextEdit()
self.text_e.textChanged.connect(self.on_edit)
self.addWidget(WWLabel(title))
self.addWidget(self.text_e)
def get_text(self):
return self.text_e.text()
def on_edit(self):
b = self.is_valid(self.get_text())
self.parent.next_button.setEnabled(b)
class SeedDialog(WindowModalDialog):
def __init__(self, parent, seed, passphrase):
WindowModalDialog.__init__(self, parent, ('Electrum - ' + _('Seed')))
self.setMinimumWidth(400)
vbox = QVBoxLayout(self)
title = _("Your wallet generation seed is:")
slayout = SeedLayout(title=title, seed=seed, msg=True, passphrase=passphrase)
vbox.addLayout(slayout)
vbox.addLayout(Buttons(CloseButton(self)))