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#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2014 Thomas Voegtlin
#
# 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 urllib
import json
import sys
import requests
from PyQt4.QtGui import QMessageBox, QApplication, QPushButton
from electrum.account import BIP32_Account
from electrum import bitcoin, util
from electrum import transaction
from electrum.plugins import BasePlugin, hook
from electrum.i18n import _
from electrum.bitcoin import regenerate_key
class Plugin(BasePlugin):
button_label = _("Verify GA instant")
@hook
def init_qt(self, gui):
self.win = gui.main_window
@hook
def transaction_dialog(self, d):
self.wallet = d.wallet
self.verify_button = b = QPushButton(self.button_label)
b.clicked.connect(lambda: self.do_verify(d.tx))
d.buttons.insert(0, b)
self.transaction_dialog_update(d)
def get_my_addr(self, tx):
"""Returns the address for given tx which can be used to request
instant confirmation verification from GreenAddress"""
for addr, _ in tx.get_outputs():
if self.wallet.is_mine(addr):
return addr
return None
@hook
def transaction_dialog_update(self, d):
if d.tx.is_complete() and self.get_my_addr(d.tx):
self.verify_button.show()
else:
self.verify_button.hide()
def do_verify(self, tx):
# 1. get the password and sign the verification request
password = None
if self.wallet.use_encryption:
msg = _('GreenAddress requires your signature to verify that transaction is instant.\n'
'Please enter your password to sign a verification request.')
password = self.win.password_dialog(msg)
if not password:
return
try:
self.verify_button.setText(_('Verifying...'))
QApplication.processEvents() # update the button label
addr = self.get_my_addr(tx)
message = "Please verify if %s is GreenAddress instant confirmed" % tx.hash()
sig = self.wallet.sign_message(addr, message, password)
sig = base64.b64encode(sig)
# 2. send the request
response = requests.request("GET", ("https://greenaddress.it/verify/?signature=%s&txhash=%s" % (urllib.quote(sig), tx.hash())),
headers = {'User-Agent': 'Electrum'})
response = response.json()
# 3. display the result
if response.get('verified'):
QMessageBox.information(None, _('Verification successful!'),
_('%s is covered by GreenAddress instant confirmation') % (tx.hash()), _('OK'))
else:
QMessageBox.critical(None, _('Verification failed!'),
_('%s is not covered by GreenAddress instant confirmation') % (tx.hash()), _('OK'))
except BaseException as e:
import traceback
traceback.print_exc(file=sys.stdout)
QMessageBox.information(None, _('Error'), str(e), _('OK'))
finally:
self.verify_button.setText(self.button_label)