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705 lines
25 KiB
705 lines
25 KiB
#!/usr/bin/env python
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#
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# Electrum - Lightweight Bitcoin Client
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# Copyright (C) 2015 Thomas Voegtlin
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import threading
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import socket
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import os
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import re
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import requests
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import json
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from hashlib import sha256
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from urlparse import urljoin
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from urllib import quote
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from PyQt4.QtGui import *
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from PyQt4.QtCore import *
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import electrum
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from electrum import bitcoin
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from electrum.bitcoin import *
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from electrum.mnemonic import Mnemonic
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from electrum import version
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from electrum.wallet import Wallet_2of3
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from electrum.i18n import _
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from electrum.plugins import BasePlugin, run_hook, hook
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from electrum_gui.qt.util import *
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from electrum_gui.qt.qrcodewidget import QRCodeWidget
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from electrum_gui.qt.amountedit import AmountEdit
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from electrum_gui.qt.main_window import StatusBarButton
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from decimal import Decimal
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# signing_xpub is hardcoded so that the wallet can be restored from seed, without TrustedCoin's server
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signing_xpub = "xpub661MyMwAqRbcGnMkaTx2594P9EDuiEqMq25PM2aeG6UmwzaohgA6uDmNsvSUV8ubqwA3Wpste1hg69XHgjUuCD5HLcEp2QPzyV1HMrPppsL"
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billing_xpub = "xpub6DTBdtBB8qUmH5c77v8qVGVoYk7WjJNpGvutqjLasNG1mbux6KsojaLrYf2sRhXAVU4NaFuHhbD9SvVPRt1MB1MaMooRuhHcAZH1yhQ1qDU"
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SEED_PREFIX = version.SEED_PREFIX_2FA
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class TrustedCoinException(Exception):
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def __init__(self, message, status_code=0):
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Exception.__init__(self, message)
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self.status_code = status_code
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class TrustedCoinCosignerClient(object):
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def __init__(self, user_agent=None, base_url='https://api.trustedcoin.com/2/', debug=False):
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self.base_url = base_url
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self.debug = debug
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self.user_agent = user_agent
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def send_request(self, method, relative_url, data=None):
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kwargs = {'headers': {}}
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if self.user_agent:
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kwargs['headers']['user-agent'] = self.user_agent
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if method == 'get' and data:
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kwargs['params'] = data
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elif method == 'post' and data:
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kwargs['data'] = json.dumps(data)
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kwargs['headers']['content-type'] = 'application/json'
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url = urljoin(self.base_url, relative_url)
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if self.debug:
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print '%s %s %s' % (method, url, data)
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response = requests.request(method, url, **kwargs)
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if self.debug:
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print response.text
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print
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if response.status_code != 200:
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message = str(response.text)
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if response.headers.get('content-type') == 'application/json':
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r = response.json()
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if 'message' in r:
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message = r['message']
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raise TrustedCoinException(message, response.status_code)
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if response.headers.get('content-type') == 'application/json':
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return response.json()
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else:
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return response.text
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def get_terms_of_service(self, billing_plan='electrum-per-tx-otp'):
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"""
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Returns the TOS for the given billing plan as a plain/text unicode string.
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:param billing_plan: the plan to return the terms for
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"""
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payload = {'billing_plan': billing_plan}
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return self.send_request('get', 'tos', payload)
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def create(self, xpubkey1, xpubkey2, email, billing_plan='electrum-per-tx-otp'):
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"""
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Creates a new cosigner resource.
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:param xpubkey1: a bip32 extended public key (customarily the hot key)
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:param xpubkey2: a bip32 extended public key (customarily the cold key)
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:param email: a contact email
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:param billing_plan: the billing plan for the cosigner
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"""
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payload = {
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'email': email,
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'xpubkey1': xpubkey1,
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'xpubkey2': xpubkey2,
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'billing_plan': billing_plan,
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}
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return self.send_request('post', 'cosigner', payload)
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def auth(self, id, otp):
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"""
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Attempt to authenticate for a particular cosigner.
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:param id: the id of the cosigner
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:param otp: the one time password
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"""
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payload = {'otp': otp}
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return self.send_request('post', 'cosigner/%s/auth' % quote(id), payload)
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def get(self, id):
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"""
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Attempt to authenticate for a particular cosigner.
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:param id: the id of the cosigner
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:param otp: the one time password
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"""
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return self.send_request('get', 'cosigner/%s' % quote(id))
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def sign(self, id, transaction, otp):
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"""
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Attempt to authenticate for a particular cosigner.
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:param id: the id of the cosigner
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:param transaction: the hex encoded [partially signed] compact transaction to sign
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:param otp: the one time password
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"""
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payload = {
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'otp': otp,
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'transaction': transaction
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}
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return self.send_request('post', 'cosigner/%s/sign' % quote(id), payload)
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def transfer_credit(self, id, recipient, otp, signature_callback):
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"""
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Tranfer a cosigner's credits to another cosigner.
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:param id: the id of the sending cosigner
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:param recipient: the id of the recipient cosigner
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:param otp: the one time password (of the sender)
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:param signature_callback: a callback that signs a text message using xpubkey1/0/0 returning a compact sig
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"""
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payload = {
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'otp': otp,
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'recipient': recipient,
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'timestamp': int(time.time()),
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}
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relative_url = 'cosigner/%s/transfer' % quote(id)
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full_url = urljoin(self.base_url, relative_url)
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headers = {
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'x-signature': signature_callback(full_url + '\n' + json.dumps(payload))
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}
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return self.send_request('post', relative_url, payload, headers)
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server = TrustedCoinCosignerClient(user_agent="Electrum/" + version.ELECTRUM_VERSION)
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class Wallet_2fa(Wallet_2of3):
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wallet_type = '2fa'
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def get_action(self):
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xpub1 = self.master_public_keys.get("x1/")
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xpub2 = self.master_public_keys.get("x2/")
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xpub3 = self.master_public_keys.get("x3/")
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if xpub2 is None and not self.storage.get('use_trustedcoin'):
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return 'show_disclaimer'
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if xpub2 is None:
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return 'create_extended_seed'
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if xpub3 is None:
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return 'create_remote_key'
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if not self.accounts:
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return 'create_accounts'
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def make_seed(self):
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return Mnemonic('english').make_seed(num_bits=256, prefix=SEED_PREFIX)
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def estimated_fee(self, tx):
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fee = Wallet_2of3.estimated_fee(self, tx)
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x = run_hook('extra_fee', tx)
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if x: fee += x
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return fee
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def get_tx_fee(self, tx):
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fee = Wallet_2of3.get_tx_fee(self, tx)
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x = run_hook('extra_fee', tx)
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if x: fee += x
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return fee
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class Plugin(BasePlugin):
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wallet = None
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def __init__(self, x, y):
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BasePlugin.__init__(self, x, y)
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self.seed_func = lambda x: bitcoin.is_new_seed(x, SEED_PREFIX)
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self.billing_info = None
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self.is_billing = False
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def constructor(self, s):
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return Wallet_2fa(s)
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def is_available(self):
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if not self.wallet:
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return False
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if self.wallet.storage.get('wallet_type') == '2fa':
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return True
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return False
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def requires_settings(self):
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return True
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def set_enabled(self, enabled):
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self.wallet.storage.put('use_' + self.name, enabled)
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def is_enabled(self):
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if not self.is_available():
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return False
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if self.wallet.master_private_keys.get('x2/'):
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return False
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return True
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def make_long_id(self, xpub_hot, xpub_cold):
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return bitcoin.sha256(''.join(sorted([xpub_hot, xpub_cold])))
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def get_user_id(self):
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xpub_hot = self.wallet.master_public_keys["x1/"]
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xpub_cold = self.wallet.master_public_keys["x2/"]
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long_id = self.make_long_id(xpub_hot, xpub_cold)
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short_id = hashlib.sha256(long_id).hexdigest()
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return long_id, short_id
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def make_xpub(self, xpub, s):
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_, _, _, c, cK = deserialize_xkey(xpub)
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cK2, c2 = bitcoin._CKD_pub(cK, c, s)
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xpub2 = ("0488B21E" + "00" + "00000000" + "00000000").decode("hex") + c2 + cK2
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return EncodeBase58Check(xpub2)
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def make_billing_address(self, num):
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long_id, short_id = self.get_user_id()
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xpub = self.make_xpub(billing_xpub, long_id)
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_, _, _, c, cK = deserialize_xkey(xpub)
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cK, c = bitcoin.CKD_pub(cK, c, num)
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address = public_key_to_bc_address( cK )
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return address
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def create_extended_seed(self, wallet, window):
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seed = wallet.make_seed()
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if not window.show_seed(seed, None):
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return
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if not window.verify_seed(seed, None, self.seed_func):
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return
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password = window.password_dialog()
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wallet.storage.put('seed_version', wallet.seed_version, True)
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wallet.storage.put('use_encryption', password is not None, True)
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words = seed.split()
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n = len(words)/2
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wallet.add_cosigner_seed(' '.join(words[0:n]), 'x1/', password)
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wallet.add_cosigner_xpub(' '.join(words[n:]), 'x2/')
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msg = [
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_('Your wallet file is:') + " %s"%os.path.abspath(wallet.storage.path),
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_('You need to be online in order to complete the creation of your wallet.'),
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_('If you generated your seed on an offline computer, click on "%s" to close this window, move your wallet file to an online computer and reopen it with Electrum.') % _('Close'),
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_('If you are online, click on "%s" to continue.') % _('Next')
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]
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return window.question('\n\n'.join(msg), no_label=_('Close'), yes_label=_('Next'))
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def show_disclaimer(self, wallet, window):
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msg = [
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_("Two-factor authentication is a service provided by TrustedCoin.") + ' ',
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_("It uses a multi-signature wallet, where you own 2 of 3 keys.") + ' ',
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_("The third key is stored on a remote server that signs transactions on your behalf.") + ' ',
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_("To use this service, you will need a smartphone with Google Authenticator.") + '\n\n',
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_("A small fee will be charged on each transaction that uses the remote server.") + ' ',
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_("You may check and modify your billing preferences once the installation is complete.") + '\n\n',
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_("Note that your coins are not locked in this service.") + ' ',
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_("You may withdraw your funds at any time and at no cost, without the remote server, by using the 'restore wallet' option with your wallet seed.") + '\n\n',
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_('The next step will generate the seed of your wallet.') + ' ',
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_('This seed will NOT be saved in your computer, and it must be stored on paper.') + ' ',
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_('To be safe from malware, you may want to do this on an offline computer, and move your wallet later to an online computer.')
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]
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icon = QPixmap(':icons/trustedcoin.png')
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if not window.question(''.join(msg), icon=icon):
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return False
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self.wallet = wallet
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self.set_enabled(True)
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return True
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def restore_third_key(self, wallet):
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long_user_id, short_id = self.get_user_id()
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xpub3 = self.make_xpub(signing_xpub, long_user_id)
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wallet.add_master_public_key('x3/', xpub3)
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@hook
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def do_clear(self):
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self.is_billing = False
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@hook
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def load_wallet(self, wallet):
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self.trustedcoin_button = StatusBarButton( QIcon(":icons/trustedcoin.png"), _("Network"), self.settings_dialog)
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self.window.statusBar().addPermanentWidget(self.trustedcoin_button)
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self.xpub = self.wallet.master_public_keys.get('x1/')
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self.user_id = self.get_user_id()[1]
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t = threading.Thread(target=self.request_billing_info)
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t.setDaemon(True)
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t.start()
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@hook
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def close_wallet(self):
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self.window.statusBar().removeWidget(self.trustedcoin_button)
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@hook
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def get_wizard_action(self, window, wallet, action):
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if hasattr(self, action):
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return getattr(self, action)
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@hook
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def installwizard_restore(self, window, storage):
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if storage.get('wallet_type') != '2fa':
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return
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seed = window.enter_seed_dialog("Enter your seed", None, func=self.seed_func)
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if not seed:
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return
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wallet = Wallet_2fa(storage)
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self.wallet = wallet
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password = window.password_dialog()
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wallet.add_seed(seed, password)
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words = seed.split()
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n = len(words)/2
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wallet.add_cosigner_seed(' '.join(words[0:n]), 'x1/', password)
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wallet.add_cosigner_seed(' '.join(words[n:]), 'x2/', password)
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self.restore_third_key(wallet)
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wallet.create_main_account(password)
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# disable plugin
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self.set_enabled(False)
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return wallet
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def create_remote_key(self, wallet, window):
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self.wallet = wallet
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self.window = window
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if wallet.storage.get('wallet_type') != '2fa':
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raise
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return
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email = self.accept_terms_of_use(window)
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if not email:
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return
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xpub_hot = wallet.master_public_keys["x1/"]
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xpub_cold = wallet.master_public_keys["x2/"]
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# Generate third key deterministically.
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long_user_id, self.user_id = self.get_user_id()
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xpub3 = self.make_xpub(signing_xpub, long_user_id)
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# secret must be sent by the server
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try:
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r = server.create(xpub_hot, xpub_cold, email)
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except socket.error:
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self.window.show_message('Server not reachable, aborting')
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return
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except TrustedCoinException as e:
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if e.status_code == 409:
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r = None
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else:
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raise e
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if r is None:
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otp_secret = None
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else:
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otp_secret = r.get('otp_secret')
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if not otp_secret:
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self.window.show_message(_('Error'))
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return
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_xpub3 = r['xpubkey_cosigner']
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_id = r['id']
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try:
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assert _id == self.user_id, ("user id error", _id, self.user_id)
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assert xpub3 == _xpub3, ("xpub3 error", xpub3, _xpub3)
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except Exception as e:
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self.window.show_message(str(e))
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return
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if not self.setup_google_auth(self.window, self.user_id, otp_secret):
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return
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self.wallet.add_master_public_key('x3/', xpub3)
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return True
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def need_server(self, tx):
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from electrum.account import BIP32_Account
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# Detect if the server is needed
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long_id, short_id = self.get_user_id()
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xpub3 = self.wallet.master_public_keys['x3/']
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for x in tx.inputs_to_sign():
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if x[0:2] == 'ff':
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xpub, sequence = BIP32_Account.parse_xpubkey(x)
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if xpub == xpub3:
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return True
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return False
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@hook
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def send_tx(self, tx):
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self.print_error("twofactor:send_tx")
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if self.wallet.storage.get('wallet_type') != '2fa':
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return
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if not self.need_server(tx):
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self.print_error("twofactor: xpub3 not needed")
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self.auth_code = None
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return
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self.auth_code = self.auth_dialog()
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@hook
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def before_send(self):
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# request billing info before forming the transaction
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self.billing_info = None
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self.waiting_dialog = WaitingDialog(self.window, 'please wait...', self.request_billing_info)
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self.waiting_dialog.start()
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self.waiting_dialog.wait()
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if self.billing_info is None:
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self.window.show_message('Could not contact server')
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return True
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return False
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@hook
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def extra_fee(self, tx):
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if self.billing_info.get('tx_remaining'):
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return 0
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if self.is_billing:
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return 0
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# trustedcoin won't charge if the total inputs is lower than their fee
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price = int(self.price_per_tx.get(1))
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assert price <= 100000
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if tx.input_value() < price:
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self.print_error("not charging for this tx")
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return 0
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return price
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@hook
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def make_unsigned_transaction(self, tx):
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price = self.extra_fee(tx)
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if not price:
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return
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tx.outputs.append(('address', self.billing_info['billing_address'], price))
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@hook
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def sign_transaction(self, tx, password):
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self.print_error("twofactor:sign")
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if self.wallet.storage.get('wallet_type') != '2fa':
|
|
self.print_error("twofactor: aborting")
|
|
return
|
|
|
|
self.long_user_id, self.user_id = self.get_user_id()
|
|
|
|
if not self.auth_code:
|
|
return
|
|
|
|
if tx.is_complete():
|
|
return
|
|
|
|
tx_dict = tx.as_dict()
|
|
raw_tx = tx_dict["hex"]
|
|
try:
|
|
r = server.sign(self.user_id, raw_tx, self.auth_code)
|
|
except Exception as e:
|
|
tx.error = str(e)
|
|
return
|
|
|
|
self.print_error( "received answer", r)
|
|
if not r:
|
|
return
|
|
|
|
raw_tx = r.get('transaction')
|
|
tx.update(raw_tx)
|
|
self.print_error("twofactor: is complete", tx.is_complete())
|
|
|
|
|
|
def auth_dialog(self ):
|
|
d = QDialog(self.window)
|
|
d.setModal(1)
|
|
vbox = QVBoxLayout(d)
|
|
pw = AmountEdit(None, is_int = True)
|
|
msg = _('Please enter your Google Authenticator code')
|
|
vbox.addWidget(QLabel(msg))
|
|
grid = QGridLayout()
|
|
grid.setSpacing(8)
|
|
grid.addWidget(QLabel(_('Code')), 1, 0)
|
|
grid.addWidget(pw, 1, 1)
|
|
vbox.addLayout(grid)
|
|
vbox.addLayout(Buttons(CancelButton(d), OkButton(d)))
|
|
if not d.exec_():
|
|
return
|
|
return pw.get_amount()
|
|
|
|
def settings_widget(self, window):
|
|
return EnterButton(_('Settings'), self.settings_dialog)
|
|
|
|
def settings_dialog(self):
|
|
self.waiting_dialog = WaitingDialog(self.window, 'please wait...', self.request_billing_info, self.show_settings_dialog)
|
|
self.waiting_dialog.start()
|
|
|
|
def show_settings_dialog(self, success):
|
|
if not success:
|
|
self.window.show_message(_('Server not reachable.'))
|
|
return
|
|
|
|
d = QDialog(self.window)
|
|
d.setWindowTitle("TrustedCoin Information")
|
|
d.setMinimumSize(500, 200)
|
|
vbox = QVBoxLayout(d)
|
|
hbox = QHBoxLayout()
|
|
|
|
logo = QLabel()
|
|
logo.setPixmap(QPixmap(":icons/trustedcoin.png"))
|
|
msg = _('This wallet is protected by TrustedCoin\'s two-factor authentication.') + '<br/>'\
|
|
+ _("For more information, visit") + " <a href=\"https://api.trustedcoin.com/#/electrum-help\">https://api.trustedcoin.com/#/electrum-help</a>"
|
|
label = QLabel(msg)
|
|
label.setOpenExternalLinks(1)
|
|
|
|
hbox.addStretch(10)
|
|
hbox.addWidget(logo)
|
|
hbox.addStretch(10)
|
|
hbox.addWidget(label)
|
|
hbox.addStretch(10)
|
|
|
|
vbox.addLayout(hbox)
|
|
vbox.addStretch(10)
|
|
|
|
msg = _('TrustedCoin charges a fee per co-signed transaction. You may pay on each transaction (an extra output will be added to your transaction), or you may purchase prepaid transaction using this dialog.') + '<br/>'
|
|
label = QLabel(msg)
|
|
label.setWordWrap(1)
|
|
vbox.addWidget(label)
|
|
|
|
vbox.addStretch(10)
|
|
grid = QGridLayout()
|
|
vbox.addLayout(grid)
|
|
|
|
v = self.price_per_tx.get(1)
|
|
grid.addWidget(QLabel(_("Price per transaction (not prepaid):")), 0, 0)
|
|
grid.addWidget(QLabel(self.window.format_amount(v) + ' ' + self.window.base_unit()), 0, 1)
|
|
|
|
i = 1
|
|
|
|
if 10 not in self.price_per_tx:
|
|
self.price_per_tx[10] = 10 * self.price_per_tx.get(1)
|
|
|
|
for k, v in sorted(self.price_per_tx.items()):
|
|
if k == 1:
|
|
continue
|
|
grid.addWidget(QLabel("Price for %d prepaid transactions:"%k), i, 0)
|
|
grid.addWidget(QLabel("%d x "%k + self.window.format_amount(v/k) + ' ' + self.window.base_unit()), i, 1)
|
|
b = QPushButton(_("Buy"))
|
|
b.clicked.connect(lambda b, k=k, v=v: self.on_buy(k, v, d))
|
|
grid.addWidget(b, i, 2)
|
|
i += 1
|
|
|
|
n = self.billing_info.get('tx_remaining', 0)
|
|
grid.addWidget(QLabel(_("Your wallet has %d prepaid transactions.")%n), i, 0)
|
|
|
|
# tranfer button
|
|
#def on_transfer():
|
|
# server.transfer_credit(self.user_id, recipient, otp, signature_callback)
|
|
# pass
|
|
#b = QPushButton(_("Transfer"))
|
|
#b.clicked.connect(on_transfer)
|
|
#grid.addWidget(b, 1, 2)
|
|
|
|
#grid.addWidget(QLabel(_("Next Billing Address:")), i, 0)
|
|
#grid.addWidget(QLabel(self.billing_info['billing_address']), i, 1)
|
|
vbox.addLayout(Buttons(CloseButton(d)))
|
|
d.exec_()
|
|
|
|
def on_buy(self, k, v, d):
|
|
d.close()
|
|
if self.window.pluginsdialog:
|
|
self.window.pluginsdialog.close()
|
|
uri = "bitcoin:" + self.billing_info['billing_address'] + "?message=TrustedCoin %d Prepaid Transactions&amount="%k + str(Decimal(v)/100000000)
|
|
self.is_billing = True
|
|
self.window.pay_from_URI(uri)
|
|
self.window.payto_e.setFrozen(True)
|
|
self.window.message_e.setFrozen(True)
|
|
self.window.amount_e.setFrozen(True)
|
|
|
|
def request_billing_info(self):
|
|
billing_info = server.get(self.user_id)
|
|
billing_address = self.make_billing_address(billing_info['billing_index'])
|
|
assert billing_address == billing_info['billing_address']
|
|
self.billing_info = billing_info
|
|
self.price_per_tx = dict(self.billing_info['price_per_tx'])
|
|
return True
|
|
|
|
def accept_terms_of_use(self, window):
|
|
vbox = QVBoxLayout()
|
|
window.set_layout(vbox)
|
|
vbox.addWidget(QLabel(_("Terms of Service")))
|
|
|
|
tos_e = QTextEdit()
|
|
tos_e.setReadOnly(True)
|
|
vbox.addWidget(tos_e)
|
|
|
|
vbox.addWidget(QLabel(_("Please enter your e-mail address")))
|
|
email_e = QLineEdit()
|
|
vbox.addWidget(email_e)
|
|
vbox.addStretch()
|
|
accept_button = OkButton(window, _('Accept'))
|
|
accept_button.setEnabled(False)
|
|
vbox.addLayout(Buttons(CancelButton(window), accept_button))
|
|
|
|
def request_TOS():
|
|
tos = server.get_terms_of_service()
|
|
self.TOS = tos
|
|
window.emit(SIGNAL('twofactor:TOS'))
|
|
|
|
def on_result():
|
|
tos_e.setText(self.TOS)
|
|
|
|
window.connect(window, SIGNAL('twofactor:TOS'), on_result)
|
|
t = threading.Thread(target=request_TOS)
|
|
t.setDaemon(True)
|
|
t.start()
|
|
|
|
regexp = r"[^@]+@[^@]+\.[^@]+"
|
|
email_e.textChanged.connect(lambda: accept_button.setEnabled(re.match(regexp,email_e.text()) is not None))
|
|
email_e.setFocus(True)
|
|
|
|
if not window.exec_():
|
|
return
|
|
|
|
email = str(email_e.text())
|
|
return email
|
|
|
|
|
|
def setup_google_auth(self, window, _id, otp_secret):
|
|
vbox = QVBoxLayout()
|
|
window.set_layout(vbox)
|
|
if otp_secret is not None:
|
|
uri = "otpauth://totp/%s?secret=%s"%('trustedcoin.com', otp_secret)
|
|
vbox.addWidget(QLabel("Please scan this QR code in Google Authenticator."))
|
|
qrw = QRCodeWidget(uri)
|
|
vbox.addWidget(qrw, 1)
|
|
msg = _('Then, enter your Google Authenticator code:')
|
|
else:
|
|
label = QLabel("This wallet is already registered, but it was never authenticated. To finalize your registration, please enter your Google Authenticator Code. If you do not have this code, delete the wallet file and start a new registration")
|
|
label.setWordWrap(1)
|
|
vbox.addWidget(label)
|
|
msg = _('Google Authenticator code:')
|
|
|
|
hbox = QHBoxLayout()
|
|
hbox.addWidget(QLabel(msg))
|
|
pw = AmountEdit(None, is_int = True)
|
|
pw.setFocus(True)
|
|
hbox.addWidget(pw)
|
|
hbox.addStretch(1)
|
|
vbox.addLayout(hbox)
|
|
|
|
b = OkButton(window, _('Next'))
|
|
b.setEnabled(False)
|
|
vbox.addLayout(Buttons(CancelButton(window), b))
|
|
pw.textChanged.connect(lambda: b.setEnabled(len(pw.text())==6))
|
|
|
|
while True:
|
|
if not window.exec_():
|
|
return False
|
|
otp = pw.get_amount()
|
|
try:
|
|
server.auth(_id, otp)
|
|
return True
|
|
except:
|
|
QMessageBox.information(self.window, _('Message'), _('Incorrect password'), _('OK'))
|
|
pw.setText('')
|
|
|