#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2012 thomasv@gitorious
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import datetime
import json
import PyQt4
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import PyQt4.QtCore as QtCore
from electrum import transaction
from electrum.bitcoin import base_encode
from electrum.i18n import _
from electrum.plugins import run_hook
from util import *
dialogs = [] # Otherwise python randomly garbage collects the dialogs...
def show_transaction(tx, parent, desc=None, prompt_if_unsaved=False):
d = TxDialog(tx, parent, desc, prompt_if_unsaved)
dialogs.append(d)
d.show()
class TxDialog(QDialog):
def __init__(self, tx, parent, desc, prompt_if_unsaved):
'''Transactions in the wallet will show their description.
Pass desc to give a description for txs not yet in the wallet.
'''
self.tx = tx
self.tx.deserialize()
self.parent = parent
self.wallet = parent.wallet
self.prompt_if_unsaved = prompt_if_unsaved
self.saved = False
self.broadcast = False
self.desc = desc
QDialog.__init__(self)
self.setMinimumWidth(600)
self.setWindowTitle(_("Transaction"))
vbox = QVBoxLayout()
self.setLayout(vbox)
vbox.addWidget(QLabel(_("Transaction ID:")))
self.tx_hash_e = ButtonsLineEdit()
qr_show = lambda: self.parent.show_qrcode(str(self.tx_hash_e.text()), 'Transaction ID')
self.tx_hash_e.addButton(":icons/qrcode.png", qr_show, _("Show as QR code"))
self.tx_hash_e.setReadOnly(True)
vbox.addWidget(self.tx_hash_e)
self.status_label = QLabel()
vbox.addWidget(self.status_label)
self.tx_desc = QLabel()
vbox.addWidget(self.tx_desc)
self.date_label = QLabel()
vbox.addWidget(self.date_label)
self.amount_label = QLabel()
vbox.addWidget(self.amount_label)
self.fee_label = QLabel()
vbox.addWidget(self.fee_label)
self.add_io(vbox)
vbox.addStretch(1)
self.sign_button = b = QPushButton(_("Sign"))
b.clicked.connect(self.sign)
self.broadcast_button = b = QPushButton(_("Broadcast"))
b.clicked.connect(self.do_broadcast)
self.save_button = b = QPushButton(_("Save"))
b.clicked.connect(self.save)
self.cancel_button = b = QPushButton(_("Close"))
b.clicked.connect(self.close)
b.setDefault(True)
self.qr_button = b = QPushButton()
b.setIcon(QIcon(":icons/qrcode.png"))
b.clicked.connect(self.show_qr)
self.copy_button = CopyButton(lambda: str(self.tx), self.parent.app)
# Action buttons
self.buttons = [self.sign_button, self.broadcast_button, self.cancel_button]
# Transaction sharing buttons
self.sharing_buttons = [self.copy_button, self.qr_button, self.save_button]
run_hook('transaction_dialog', self)
hbox = QHBoxLayout()
hbox.addLayout(Buttons(*self.sharing_buttons))
hbox.addStretch(1)
hbox.addLayout(Buttons(*self.buttons))
vbox.addLayout(hbox)
self.update()
def do_broadcast(self):
self.parent.broadcast_transaction(self.tx, self.desc, parent=self)
self.broadcast = True
self.update()
def closeEvent(self, event):
if (self.prompt_if_unsaved and not self.saved and not self.broadcast
and QMessageBox.question(
self, _('Warning'),
_('This transaction is not saved. Close anyway?'),
QMessageBox.Yes | QMessageBox.No) == QMessageBox.No):
event.ignore()
else:
event.accept()
dialogs.remove(self)
def show_qr(self):
text = self.tx.raw.decode('hex')
text = base_encode(text, base=43)
try:
self.parent.show_qrcode(text, 'Transaction')
except Exception as e:
self.show_message(str(e))
def sign(self):
def sign_done(success):
self.sign_button.setDisabled(False)
self.prompt_if_unsaved = False
self.saved = False
self.update()
self.sign_button.setDisabled(True)
cancelled, ret = self.parent.sign_tx(self.tx, sign_done, parent=self)
if cancelled:
self.sign_button.setDisabled(False)
def save(self):
name = 'signed_%s.txn' % (self.tx.hash()[0:8]) if self.tx.is_complete() else 'unsigned.txn'
fileName = self.parent.getSaveFileName(_("Select where to save your signed transaction"), name, "*.txn")
if fileName:
with open(fileName, "w+") as f:
f.write(json.dumps(self.tx.as_dict(), indent=4) + '\n')
self.show_message(_("Transaction saved successfully"))
self.saved = True
def update(self):
is_relevant, is_mine, v, fee = self.wallet.get_wallet_delta(self.tx)
tx_hash = self.tx.hash()
desc = self.desc
time_str = None
self.broadcast_button.hide()
if self.tx.is_complete():
status = _("Signed")
if tx_hash in self.wallet.transactions.keys():
desc, is_default = self.wallet.get_label(tx_hash)
conf, timestamp = self.wallet.get_confirmations(tx_hash)
if timestamp:
time_str = datetime.datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
else:
time_str = _('Pending')
status = _("%d confirmations")%conf
else:
self.broadcast_button.show()
# cannot broadcast when offline
if self.parent.network is None:
self.broadcast_button.setEnabled(False)
else:
s, r = self.tx.signature_count()
status = _("Unsigned") if s == 0 else _('Partially signed') + ' (%d/%d)'%(s,r)
tx_hash = _('Unknown');
if self.wallet.can_sign(self.tx):
self.sign_button.show()
else:
self.sign_button.hide()
self.tx_hash_e.setText(tx_hash)
if desc is None:
self.tx_desc.hide()
else:
self.tx_desc.setText(_("Description") + ': ' + desc)
self.tx_desc.show()
self.status_label.setText(_('Status:') + ' ' + status)
if time_str is not None:
self.date_label.setText(_("Date: %s")%time_str)
self.date_label.show()
else:
self.date_label.hide()
# if we are not synchronized, we cannot tell
if not self.wallet.up_to_date:
return
if is_relevant:
if is_mine:
if fee is not None:
self.amount_label.setText(_("Amount sent:")+' %s'% self.parent.format_amount(-v+fee) + ' ' + self.parent.base_unit())
self.fee_label.setText(_("Transaction fee")+': %s'% self.parent.format_amount(-fee) + ' ' + self.parent.base_unit())
else:
self.amount_label.setText(_("Amount sent:")+' %s'% self.parent.format_amount(-v) + ' ' + self.parent.base_unit())
self.fee_label.setText(_("Transaction fee")+': '+ _("unknown"))
else:
self.amount_label.setText(_("Amount received:")+' %s'% self.parent.format_amount(v) + ' ' + self.parent.base_unit())
else:
self.amount_label.setText(_("Transaction unrelated to your wallet"))
run_hook('transaction_dialog_update', self)
def add_io(self, vbox):
if self.tx.locktime > 0:
vbox.addWidget(QLabel("LockTime: %d\n" % self.tx.locktime))
vbox.addWidget(QLabel(_("Inputs") + ' (%d)'%len(self.tx.inputs)))
ext = QTextCharFormat()
rec = QTextCharFormat()
rec.setBackground(QBrush(QColor("lightgreen")))
rec.setToolTip(_("Wallet receive address"))
chg = QTextCharFormat()
chg.setBackground(QBrush(QColor("yellow")))
chg.setToolTip(_("Wallet change address"))
def text_format(addr):
if self.wallet.is_mine(addr):
return chg if self.wallet.is_change(addr) else rec
return ext
i_text = QTextEdit()
i_text.setFont(QFont(MONOSPACE_FONT))
i_text.setReadOnly(True)
i_text.setMaximumHeight(100)
cursor = i_text.textCursor()
for x in self.tx.inputs:
if x.get('is_coinbase'):
cursor.insertText('coinbase')
else:
prevout_hash = x.get('prevout_hash')
prevout_n = x.get('prevout_n')
cursor.insertText(prevout_hash[0:8] + '...', ext)
cursor.insertText(prevout_hash[-8:] + ":%-4d " % prevout_n, ext)
addr = x.get('address')
if addr == "(pubkey)":
_addr = self.wallet.find_pay_to_pubkey_address(prevout_hash, prevout_n)
if _addr:
addr = _addr
if addr is None:
addr = _('unknown')
cursor.insertText(addr, text_format(addr))
cursor.insertBlock()
vbox.addWidget(i_text)
vbox.addWidget(QLabel(_("Outputs") + ' (%d)'%len(self.tx.outputs)))
o_text = QTextEdit()
o_text.setFont(QFont(MONOSPACE_FONT))
o_text.setReadOnly(True)
o_text.setMaximumHeight(100)
cursor = o_text.textCursor()
for addr, v in self.tx.get_outputs():
cursor.insertText(addr, text_format(addr))
if v is not None:
cursor.insertText('\t', ext)
cursor.insertText(self.parent.format_amount(v, whitespaces = True), ext)
cursor.insertBlock()
vbox.addWidget(o_text)
def show_message(self, msg):
QMessageBox.information(self, _('Message'), msg, _('OK'))