commit 9500715141f7c085a0c014fdab81bc7c41f88656
parent 2d3df982eb868ca3edb5cfb68687bae78ddbdf32
Author: ThomasV <thomasv@gitorious>
Date: Thu, 21 Aug 2014 19:35:51 +0200
add cosignerpool plugin
Diffstat:
1 file changed, 191 insertions(+), 0 deletions(-)
diff --git a/plugins/cosigner_pool.py b/plugins/cosigner_pool.py
@@ -0,0 +1,191 @@
+#!/usr/bin/env python
+#
+# Electrum - lightweight Bitcoin client
+# Copyright (C) 2014 Thomas Voegtlin
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import socket
+import threading
+import time
+import xmlrpclib
+
+from PyQt4.QtGui import *
+from PyQt4.QtCore import *
+
+from electrum import bitcoin, util
+from electrum import transaction
+from electrum.plugins import BasePlugin
+from electrum.i18n import _
+
+import sys
+import traceback
+
+
+PORT = 12344
+HOST = 'ecdsa.net'
+description = _("This plugin facilitates the use of multi-signatures wallets. It sends and receives partially signed transactions from/to your cosigner wallet. Transactions are encrypted and stored on a remote server.")
+server = xmlrpclib.ServerProxy('http://%s:%d'%(HOST,PORT), allow_none=True)
+
+
+class Listener(threading.Thread):
+
+ def __init__(self, parent):
+ threading.Thread.__init__(self)
+ self.daemon = True
+ self.parent = parent
+ self.key = None
+ self.is_running = False
+ self.message = None
+ self.delete = False
+
+ def set_key(self, key):
+ self.key = key
+
+ def clear(self):
+ self.delete = True
+
+ def run(self):
+ self.is_running = True
+ while self.is_running:
+
+ if not self.key:
+ time.sleep(2)
+ continue
+
+ if not self.message:
+ try:
+ self.message = server.get(self.key)
+ except Exception as e:
+ util.print_error("cannot contact cosigner pool")
+ time.sleep(30)
+ continue
+
+ if self.message:
+ self.parent.win.emit(SIGNAL("cosigner:receive"))
+ else:
+ if self.delete:
+ # save it to disk
+ server.delete(self.key)
+ self.message = None
+ self.delete = False
+
+ time.sleep(30)
+
+
+class Plugin(BasePlugin):
+
+ wallet = None
+ listener = None
+
+ def fullname(self):
+ return 'Cosigner Pool'
+
+ def description(self):
+ return description
+
+ def init(self):
+ self.win = self.gui.main_window
+ self.win.connect(self.win, SIGNAL('cosigner:receive'), self.on_receive)
+ if self.listener is None:
+ self.listener = Listener(self)
+ self.listener.start()
+
+ def load_wallet(self, wallet):
+ self.wallet = wallet
+ mpk = self.wallet.get_master_public_keys()
+
+ self.cold = mpk.get('cold')
+ if self.cold:
+ self.cold_K = bitcoin.deserialize_xkey(self.cold)[-1].encode('hex')
+ self.cold_hash = bitcoin.Hash(self.cold_K).encode('hex')
+
+ self.hot = mpk.get('hot')
+ if self.hot:
+ self.hot_K = bitcoin.deserialize_xkey(self.hot)[-1].encode('hex')
+ self.hot_hash = bitcoin.Hash(self.hot_K).encode('hex')
+ self.listener.set_key(self.hot_hash)
+
+
+ def transaction_dialog(self, d):
+ self.send_button = b = QPushButton(_("Send to cosigner"))
+ b.clicked.connect(lambda: self.do_send(d.tx))
+ d.buttons.insertWidget(2, b)
+ self.transaction_dialog_update(d)
+
+
+ def transaction_dialog_update(self, d):
+ if d.tx.is_complete():
+ self.send_button.hide()
+ return
+ if self.cosigner_can_sign(d.tx):
+ self.send_button.show()
+ else:
+ self.send_button.hide()
+
+
+ def cosigner_can_sign(self, tx):
+ from electrum.transaction import x_to_xpub
+ xpub_set = set([])
+ for txin in tx.inputs:
+ for x_pubkey in txin['x_pubkeys']:
+ xpub = x_to_xpub(x_pubkey)
+ if xpub:
+ xpub_set.add(xpub)
+
+ return self.cold in xpub_set
+
+
+ def do_send(self, tx):
+ if not self.cosigner_can_sign(tx):
+ return
+
+ message = bitcoin.encrypt_message(tx.raw, self.cold_K)
+
+ try:
+ server.put(self.cold_hash, message)
+ self.win.show_message("Your transaction was sent to the cosigning pool.\nOpen your cosigner wallet to retrieve it.")
+ except Exception as e:
+ self.win.show_message(str(e))
+
+
+ def on_receive(self):
+
+ if self.wallet.use_encryption:
+ password = self.win.password_dialog('An encrypted transaction was retrieved from cosigning pool.\nPlease enter your password to decrypt it.')
+ if not password:
+ return
+ else:
+ password = None
+
+ message = self.listener.message
+ xpriv = self.wallet.get_master_private_key('m/', password)
+ if not xpriv:
+ return
+ try:
+ k = bitcoin.deserialize_xkey(xpriv)[-1].encode('hex')
+ EC = bitcoin.EC_KEY(k.decode('hex'))
+ message = EC.decrypt_message(message)
+ except Exception as e:
+ traceback.print_exc(file=sys.stdout)
+ self.win.show_message(str(e))
+ return
+
+ self.listener.clear()
+
+ tx = transaction.Transaction.deserialize(message)
+ self.win.show_transaction(tx)
+
+
+
