plugins/labels.py

   1 from electrum.util import print_error
   2
   3 import httplib, urllib
   4 import socket
   5 import hashlib
   6 import json
   7 from urlparse import urlparse, parse_qs
   8 try:
   9     import PyQt4
  10 except Exception:
  11     sys.exit("Error: Could not import PyQt4 on Linux systems, you may try 'sudo apt-get install python-qt4'")
  12
  13 from PyQt4.QtGui import *
  14 from PyQt4.QtCore import *
  15 import PyQt4.QtCore as QtCore
  16 import PyQt4.QtGui as QtGui
  17 import aes
  18 import base64
  19 from electrum import bmp, pyqrnative
  20 from electrum.plugins import BasePlugin
  21 from electrum.i18n import _
  22
  23 from electrum_gui.qt import HelpButton, EnterButton
  24
  25 class Plugin(BasePlugin):
  26
  27     def fullname(self):
  28         return _('Label Sync')
  29
  30     def description(self):
  31         return '%s\n\n%s%s%s' % (_("This plugin can sync your labels across multiple Electrum installs by using a remote database to save your data. Labels, transactions and addresses are all sent and stored encrypted on the remote server. This code might increase the load of your wallet with a few microseconds as it will sync labels on each startup."), _("To get started visit"), " http://labelectrum.herokuapp.com/ ", _(" to sign up for an account."))
  32
  33     def version(self):
  34         return "0.2.1"
  35
  36     def encode(self, message):
  37         encrypted = aes.encryptData(self.encode_password, unicode(message))
  38         encoded_message = base64.b64encode(encrypted)
  39
  40         return encoded_message
  41
  42     def decode(self, message):
  43         decoded_message = aes.decryptData(self.encode_password, base64.b64decode(unicode(message)) )
  44
  45         return decoded_message
  46
  47
  48     def init(self):
  49         self.target_host = 'labelectrum.herokuapp.com'
  50         self.window = self.gui.main_window
  51
  52     def load_wallet(self, wallet):
  53         self.wallet = wallet
  54         if self.wallet.get_master_public_key():
  55             mpk = self.wallet.get_master_public_key()
  56         else:
  57             mpk = self.wallet.master_public_keys["m/0'/"][1]
  58         self.encode_password = hashlib.sha1(mpk).digest().encode('hex')[:32]
  59         self.wallet_id = hashlib.sha256(mpk).digest().encode('hex')
  60
  61         addresses = []
  62         for account in self.wallet.accounts.values():
  63             for address in account.get_addresses(0):
  64                 addresses.append(address)
  65
  66         self.addresses = addresses
  67
  68         if self.auth_token():
  69             # If there is an auth token we can try to actually start syncing
  70             self.full_pull()
  71
  72     def auth_token(self):
  73         return self.config.get("plugin_label_api_key")
  74
  75     def is_available(self):
  76         return True
  77
  78     def requires_settings(self):
  79         return True
  80
  81     def set_label(self, item,label, changed):
  82         if not changed:
  83             return
  84         try:
  85             bundle = {"label": {"external_id": self.encode(item), "text": self.encode(label)}}
  86             params = json.dumps(bundle)
  87             connection = httplib.HTTPConnection(self.target_host)
  88             connection.request("POST", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
  89
  90             response = connection.getresponse()
  91             if response.reason == httplib.responses[httplib.NOT_FOUND]:
  92                 return
  93             response = json.loads(response.read())
  94         except socket.gaierror as e:
  95             print_error('Error connecting to service: %s ' %  e)
  96             return False
  97
  98     def settings_widget(self, window):
  99         return EnterButton(_('Settings'), self.settings_dialog)
 100
 101     def settings_dialog(self):
 102         def check_for_api_key(api_key):
 103             if api_key and len(api_key) > 12:
 104               self.config.set_key("plugin_label_api_key", str(self.auth_token_edit.text()))
 105               self.upload.setEnabled(True)
 106               self.download.setEnabled(True)
 107               self.accept.setEnabled(True)
 108             else:
 109               self.upload.setEnabled(False)
 110               self.download.setEnabled(False)
 111               self.accept.setEnabled(False)
 112
 113         d = QDialog()
 114         layout = QGridLayout(d)
 115         layout.addWidget(QLabel("API Key: "),0,0)
 116
 117         self.auth_token_edit = QLineEdit(self.auth_token())
 118         self.auth_token_edit.textChanged.connect(check_for_api_key)
 119
 120         layout.addWidget(QLabel("Label sync options: "),2,0)
 121         layout.addWidget(self.auth_token_edit, 0,1,1,2)
 122
 123         decrypt_key_text =  QLineEdit(self.encode_password)
 124         decrypt_key_text.setReadOnly(True)
 125         layout.addWidget(decrypt_key_text, 1,1)
 126         layout.addWidget(QLabel("Decryption key: "),1,0)
 127         layout.addWidget(HelpButton("This key can be used on the LabElectrum website to decrypt your data in case you want to review it online."),1,2)
 128
 129         self.upload = QPushButton("Force upload")
 130         self.upload.clicked.connect(self.full_push)
 131         layout.addWidget(self.upload, 2,1)
 132
 133         self.download = QPushButton("Force download")
 134         self.download.clicked.connect(lambda: self.full_pull(True))
 135         layout.addWidget(self.download, 2,2)
 136
 137         c = QPushButton(_("Cancel"))
 138         c.clicked.connect(d.reject)
 139
 140         self.accept = QPushButton(_("Done"))
 141         self.accept.clicked.connect(d.accept)
 142
 143         layout.addWidget(c,3,1)
 144         layout.addWidget(self.accept,3,2)
 145
 146         check_for_api_key(self.auth_token())
 147
 148         if d.exec_():
 149           return True
 150         else:
 151           return False
 152
 153     def enable(self):
 154         if not self.auth_token(): # First run, throw plugin settings in your face
 155             self.init()
 156             self.load_wallet(self.gui.main_window.wallet)
 157             if self.settings_dialog():
 158                 self.set_enabled(True)
 159                 return True
 160             else:
 161                 self.set_enabled(False)
 162                 return False
 163
 164         self.set_enabled(True)
 165         return True
 166
 167
 168     def full_push(self):
 169         if self.do_full_push():
 170             QMessageBox.information(None, _("Labels uploaded"), _("Your labels have been uploaded."))
 171
 172     def full_pull(self, force = False):
 173         if self.do_full_pull(force) and force:
 174             QMessageBox.information(None, _("Labels synchronized"), _("Your labels have been synchronized."))
 175             self.window.update_history_tab()
 176             self.window.update_completions()
 177             self.window.update_receive_tab()
 178             self.window.update_contacts_tab()
 179
 180     def do_full_push(self):
 181         try:
 182             bundle = {"labels": {}}
 183             for key, value in self.wallet.labels.iteritems():
 184                 encoded = self.encode(key)
 185                 bundle["labels"][encoded] = self.encode(value)
 186
 187             params = json.dumps(bundle)
 188             connection = httplib.HTTPConnection(self.target_host)
 189             connection.request("POST", ("/api/wallets/%s/labels/batch.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
 190
 191             response = connection.getresponse()
 192             if response.reason == httplib.responses[httplib.NOT_FOUND]:
 193                 return
 194             try:
 195                 response = json.loads(response.read())
 196             except ValueError as e:
 197                 return False
 198
 199             if "error" in response:
 200                 QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 201                 return False
 202
 203             return True
 204         except socket.gaierror as e:
 205             print_error('Error connecting to service: %s ' %  e)
 206             return False
 207
 208     def do_full_pull(self, force = False):
 209         try:
 210             connection = httplib.HTTPConnection(self.target_host)
 211             connection.request("GET", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())),"", {'Content-Type': 'application/json'})
 212             response = connection.getresponse()
 213             if response.reason == httplib.responses[httplib.NOT_FOUND]:
 214                 return
 215             try:
 216                 response = json.loads(response.read())
 217             except ValueError as e:
 218                 return False
 219
 220             if "error" in response:
 221                 QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 222                 return False
 223
 224             for label in response:
 225                  decoded_key = self.decode(label["external_id"])
 226                  decoded_label = self.decode(label["text"])
 227                  if force or not self.wallet.labels.get(decoded_key):
 228                      self.wallet.labels[decoded_key] = decoded_label
 229             return True
 230         except socket.gaierror as e:
 231             print_error('Error connecting to service: %s ' %  e)
 232             return False