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