plugins/labels.py

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