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#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2014 Thomas Voegtlin
#
# 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.
import base64
import urllib
import sys
import requests
from PyQt4.QtGui import QApplication, QPushButton
from electrum.plugins import BasePlugin, hook
from electrum.i18n import _
class Plugin(BasePlugin):
button_label = _("Verify GA instant")
@hook
def transaction_dialog(self, d):
d.verify_button = QPushButton(self.button_label)
d.verify_button.clicked.connect(lambda: self.do_verify(d))
d.buttons.insert(0, d.verify_button)
self.transaction_dialog_update(d)
def get_my_addr(self, d):
"""Returns the address for given tx which can be used to request
instant confirmation verification from GreenAddress"""
for addr, _ in d.tx.get_outputs():
if d.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):
d.verify_button.show()
else:
d.verify_button.hide()
def do_verify(self, d):
tx = d.tx
wallet = d.wallet
window = d.parent
# 1. get the password and sign the verification request
password = None
if wallet.use_encryption:
msg = _('GreenAddress requires your signature \n'
'to verify that transaction is instant.\n'
'Please enter your password to sign a\n'
'verification request.')
password = window.password_dialog(msg, parent=d)
if not password:
return
try:
d.verify_button.setText(_('Verifying...'))
QApplication.processEvents() # update the button label
addr = self.get_my_addr(d)
message = "Please verify if %s is GreenAddress instant confirmed" % tx.hash()
sig = 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'):
d.show_message(_('%s is covered by GreenAddress instant confirmation') % (tx.hash()), title=_('Verification successful!'))
else:
d.show_critical(_('%s is not covered by GreenAddress instant confirmation') % (tx.hash()), title=_('Verification failed!'))
except BaseException as e:
import traceback
traceback.print_exc(file=sys.stdout)
d.show_error(str(e))
finally:
d.verify_button.setText(self.button_label)