292 lines
9.0 KiB
Python
292 lines
9.0 KiB
Python
from electrum.util import print_error
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from urlparse import urlparse, parse_qs
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from PyQt4.QtGui import QPushButton, QMessageBox, QDialog, QVBoxLayout, QHBoxLayout, QGridLayout, QLabel
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from PyQt4.QtCore import Qt
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from electrum_gui.i18n import _
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import re
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from electrum import Transaction
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from electrum.bitcoin import MIN_RELAY_TX_FEE, is_valid
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from electrum_gui.qrcodewidget import QRCodeWidget
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import electrum_gui.bmp
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import json
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try:
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import zbar
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except ImportError:
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zbar = None
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from electrum_gui import BasePlugin
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class Plugin(BasePlugin):
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def fullname(self): return 'QR scans'
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def description(self): return "QR Scans.\nInstall the zbar package (http://zbar.sourceforge.net/download.html) to enable this plugin"
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def __init__(self, gui, name):
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BasePlugin.__init__(self, gui, name)
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self._is_available = self._init()
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def _init(self):
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if not zbar:
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return False
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try:
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proc = zbar.Processor()
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proc.init()
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except zbar.SystemError:
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# Cannot open video device
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return False
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return True
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def is_available(self):
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return self._is_available
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def create_send_tab(self, grid):
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b = QPushButton(_("Scan QR code"))
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b.clicked.connect(self.fill_from_qr)
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grid.addWidget(b, 1, 5)
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b2 = QPushButton(_("Scan TxQR"))
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b2.clicked.connect(self.read_raw_qr)
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if not self.gui.wallet.seed:
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b3 = QPushButton(_("Show unsigned TxQR"))
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b3.clicked.connect(self.show_raw_qr)
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grid.addWidget(b3, 7, 1)
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grid.addWidget(b2, 7, 2)
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else:
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grid.addWidget(b2, 7, 1)
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def scan_qr(self):
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proc = zbar.Processor()
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proc.init()
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proc.visible = True
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while True:
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try:
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proc.process_one()
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except:
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# User closed the preview window
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return {}
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for r in proc.results:
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if str(r.type) != 'QRCODE':
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continue
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return r.data
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def show_raw_qr(self):
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r = unicode( self.gui.payto_e.text() )
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r = r.strip()
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# label or alias, with address in brackets
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m = re.match('(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>', r)
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to_address = m.group(2) if m else r
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if not is_valid(to_address):
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QMessageBox.warning(self.gui, _('Error'), _('Invalid Bitcoin Address') + ':\n' + to_address, _('OK'))
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return
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try:
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amount = self.gui.read_amount(unicode( self.gui.amount_e.text()))
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except:
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QMessageBox.warning(self.gui, _('Error'), _('Invalid Amount'), _('OK'))
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return
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try:
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fee = self.gui.read_amount(unicode( self.gui.fee_e.text()))
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except:
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QMessageBox.warning(self.gui, _('Error'), _('Invalid Fee'), _('OK'))
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return
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try:
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tx = self.gui.wallet.mktx( [(to_address, amount)], None, fee, account=self.gui.current_account)
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except BaseException, e:
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self.gui.show_message(str(e))
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return
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if tx.requires_fee(self.gui.wallet.verifier) and fee < MIN_RELAY_TX_FEE:
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QMessageBox.warning(self.gui, _('Error'), _("This transaction requires a higher fee, or it will not be propagated by the network."), _('OK'))
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return
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try:
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out = {
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"hex" : tx.hash(),
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"complete" : "false"
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}
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input_info = []
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except BaseException, e:
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self.gui.show_message(str(e))
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try:
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json_text = json.dumps(tx.as_dict()).replace(' ', '')
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self.show_tx_qrcode(json_text, 'Unsigned Transaction')
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except BaseException, e:
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self.gui.show_message(str(e))
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def show_tx_qrcode(self, data, title):
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if not data: return
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d = QDialog(self.gui)
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d.setModal(1)
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d.setWindowTitle(title)
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d.setMinimumSize(250, 525)
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vbox = QVBoxLayout()
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qrw = QRCodeWidget(data)
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vbox.addWidget(qrw, 0)
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hbox = QHBoxLayout()
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hbox.addStretch(1)
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def print_qr(self):
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filename = "qrcode.bmp"
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electrum_gui.bmp.save_qrcode(qrw.qr, filename)
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QMessageBox.information(None, _('Message'), _("QR code saved to file") + " " + filename, _('OK'))
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b = QPushButton(_("Save"))
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hbox.addWidget(b)
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b.clicked.connect(print_qr)
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b = QPushButton(_("Close"))
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hbox.addWidget(b)
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b.clicked.connect(d.accept)
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b.setDefault(True)
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vbox.addLayout(hbox, 1)
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d.setLayout(vbox)
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d.exec_()
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def read_raw_qr(self):
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qrcode = self.scan_qr()
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if qrcode:
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tx_dict = self.gui.tx_dict_from_text(qrcode)
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if tx_dict:
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self.create_transaction_details_window(tx_dict)
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def create_transaction_details_window(self, tx_dict):
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tx = Transaction(tx_dict["hex"])
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dialog = QDialog(self.gui)
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dialog.setMinimumWidth(500)
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dialog.setWindowTitle(_('Process Offline transaction'))
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dialog.setModal(1)
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l = QGridLayout()
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dialog.setLayout(l)
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l.addWidget(QLabel(_("Transaction status:")), 3,0)
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l.addWidget(QLabel(_("Actions")), 4,0)
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if tx_dict["complete"] == False:
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l.addWidget(QLabel(_("Unsigned")), 3,1)
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if self.gui.wallet.seed :
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b = QPushButton("Sign transaction")
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input_info = json.loads(tx_dict["input_info"])
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b.clicked.connect(lambda: self.sign_raw_transaction(tx, input_info, dialog))
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l.addWidget(b, 4, 1)
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else:
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l.addWidget(QLabel(_("Wallet is de-seeded, can't sign.")), 4,1)
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else:
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l.addWidget(QLabel(_("Signed")), 3,1)
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b = QPushButton("Broadcast transaction")
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b.clicked.connect(lambda: self.gui.send_raw_transaction(tx, dialog))
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l.addWidget(b,4,1)
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l.addWidget( self.gui.generate_transaction_information_widget(tx), 0,0,2,3)
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closeButton = QPushButton(_("Close"))
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closeButton.clicked.connect(lambda: dialog.done(0))
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l.addWidget(closeButton, 4,2)
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dialog.exec_()
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def do_protect(self, func, args):
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if self.gui.wallet.use_encryption:
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password = self.gui.password_dialog()
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if not password:
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return
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else:
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password = None
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if args != (False,):
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args = (self,) + args + (password,)
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else:
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args = (self,password)
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apply( func, args)
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def protected(func):
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return lambda s, *args: s.do_protect(func, args)
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@protected
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def sign_raw_transaction(self, tx, input_info, dialog ="", password = ""):
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try:
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self.gui.wallet.signrawtransaction(tx, input_info, [], password)
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txtext = json.dumps(tx.as_dict()).replace(' ', '')
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self.show_tx_qrcode(txtext, 'Signed Transaction')
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except BaseException, e:
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self.gui.show_message(str(e))
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def fill_from_qr(self):
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qrcode = parse_uri(self.scan_qr())
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if not qrcode:
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return
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if 'address' in qrcode:
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self.gui.payto_e.setText(qrcode['address'])
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if 'amount' in qrcode:
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self.gui.amount_e.setText(str(qrcode['amount']))
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if 'label' in qrcode:
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self.gui.message_e.setText(qrcode['label'])
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if 'message' in qrcode:
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self.gui.message_e.setText("%s (%s)" % (self.gui.message_e.text(), qrcode['message']))
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def parse_uri(uri):
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if ':' not in uri:
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# It's just an address (not BIP21)
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return {'address': uri}
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if '//' not in uri:
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# Workaround for urlparse, it don't handle bitcoin: URI properly
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uri = uri.replace(':', '://')
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uri = urlparse(uri)
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result = {'address': uri.netloc}
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if uri.path.startswith('?'):
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params = parse_qs(uri.path[1:])
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else:
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params = parse_qs(uri.path)
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for k,v in params.items():
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if k in ('amount', 'label', 'message'):
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result[k] = v[0]
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return result
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if __name__ == '__main__':
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# Run some tests
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assert(parse_uri('1Marek48fwU7mugmSe186do2QpUkBnpzSN') ==
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{'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
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assert(parse_uri('bitcoin://1Marek48fwU7mugmSe186do2QpUkBnpzSN') ==
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{'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
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assert(parse_uri('bitcoin:1Marek48fwU7mugmSe186do2QpUkBnpzSN') ==
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{'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
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assert(parse_uri('bitcoin:1Marek48fwU7mugmSe186do2QpUkBnpzSN?amount=10') ==
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{'amount': '10', 'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
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assert(parse_uri('bitcoin:1Marek48fwU7mugmSe186do2QpUkBnpzSN?amount=10&label=slush&message=Small%20tip%20to%20slush') ==
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{'amount': '10', 'label': 'slush', 'message': 'Small tip to slush', 'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
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