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