electrum

#!/usr/bin/env python2
# -*- mode: python -*-
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2011 thomasv@gitorious
#
# 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 os
import sys


script_dir = os.path.dirname(os.path.realpath(__file__))
is_bundle = getattr(sys, 'frozen', False)
is_local = not is_bundle and os.path.exists(os.path.join(script_dir, "setup-release.py"))
is_android = 'ANDROID_DATA' in os.environ
is_kivy = os.environ.get('PYTHONHOME','').find('kivy') != -1

if is_local or is_android:
    sys.path.insert(0, os.path.join(script_dir, 'packages'))
elif is_bundle and sys.platform=='darwin':
    sys.path.insert(0, os.getcwd() + "/lib/python2.7/packages")

# pure-python dependencies need to be imported here for pyinstaller
try:
    import dns
    import aes
    import ecdsa
    import requests
    import six
    import qrcode
    import pbkdf2
    import google.protobuf
except ImportError as e:
    sys.exit("Error: %s. Try 'sudo pip install <module-name>'"%e.message)

# the following imports are for pyinstaller
from google.protobuf import descriptor
from google.protobuf import message
from google.protobuf import reflection
from google.protobuf import descriptor_pb2


# check that we have the correct version of ecdsa
try:
    from ecdsa.ecdsa import curve_secp256k1, generator_secp256k1
except Exception:
    sys.exit("cannot import ecdsa.curve_secp256k1. You probably need to upgrade ecdsa.\nTry: sudo pip install --upgrade ecdsa")


# load local module as lbryum
if is_bundle or is_local or is_android:
    import imp
    imp.load_module('lbryum', *imp.find_module('lib'))
    imp.load_module('lbryum_gui', *imp.find_module('gui'))


from lbryum import util
from lbryum import SimpleConfig, Network, Wallet, WalletStorage
from lbryum.util import print_msg, print_error, print_stderr, json_encode, json_decode, set_verbosity, InvalidPassword
from lbryum.plugins import Plugins
from lbryum.commands import get_parser, known_commands, Commands, config_variables
from lbryum.daemon import Daemon, get_daemon


# get password routine
def prompt_password(prompt, confirm=True):
    import getpass
    password = getpass.getpass(prompt, stream=None)
    if password and confirm:
        password2 = getpass.getpass("Confirm: ")
        if password != password2:
            sys.exit("Error: Passwords do not match.")
    if not password:
        password = None
    return password



def init_gui(config, network, daemon, plugins):
    gui_name = config.get('gui', 'qt')
    if gui_name in ['lite', 'classic']:
        gui_name = 'qt'
    gui = __import__('lbryum_gui.' + gui_name, fromlist=['lbryum_gui'])
    gui = gui.ElectrumGui(config, network, daemon, plugins)
    return gui


def run_non_RPC(config):
    cmdname = config.get('cmd')

    storage = WalletStorage(config.get_wallet_path())
    if storage.file_exists:
        sys.exit("Error: Remove the existing wallet first!")

    def password_dialog():
        return prompt_password("Password (hit return if you do not wish to encrypt your wallet):")

    if cmdname == 'restore':
        text = config.get('text')
        password = password_dialog() if Wallet.is_seed(text) or Wallet.is_xprv(text) or Wallet.is_private_key(text) else None
        try:
            wallet = Wallet.from_text(text, password, storage)
        except BaseException as e:
            sys.exit(str(e))
        if not config.get('offline'):
            network = Network(config)
            network.start()
            wallet.start_threads(network)
            print_msg("Recovering wallet...")
            wallet.synchronize()
            wallet.wait_until_synchronized()
            msg = "Recovery successful" if wallet.is_found() else "Found no history for this wallet"
        else:
            msg = "This wallet was restored offline. It may contain more addresses than displayed."
        print_msg(msg)

    elif cmdname == 'create':
        password = password_dialog()
        wallet = Wallet(storage)
        seed = wallet.make_seed()
        wallet.add_seed(seed, password)
        wallet.create_master_keys(password)
        wallet.create_main_account()
        wallet.synchronize()
        print_msg("Your wallet generation seed is:\n\"%s\"" % seed)
        print_msg("Please keep it in a safe place; if you lose it, you will not be able to restore your wallet.")

    elif cmdname == 'deseed':
        if not wallet.seed:
            print_msg("Error: This wallet has no seed")
        else:
            ns = wallet.storage.path + '.seedless'
            print_msg("Warning: you are going to create a seedless wallet'\nIt will be saved in '%s'" % ns)
            if raw_input("Are you sure you want to continue? (y/n) ") in ['y', 'Y', 'yes']:
                wallet.storage.path = ns
                wallet.seed = ''
                wallet.storage.put('seed', '')
                wallet.use_encryption = False
                wallet.storage.put('use_encryption', wallet.use_encryption)
                for k in wallet.imported_keys.keys():
                    wallet.imported_keys[k] = ''
                wallet.storage.put('imported_keys', wallet.imported_keys)
                print_msg("Done.")
            else:
                print_msg("Action canceled.")
        wallet.storage.write()
        sys.exit(0)

    wallet.storage.write()
    print_msg("Wallet saved in '%s'" % wallet.storage.path)
    sys.exit(0)


def init_cmdline(config_options):
    config = SimpleConfig(config_options)
    cmdname = config.get('cmd')
    cmd = known_commands[cmdname]

    if cmdname == 'signtransaction' and config.get('privkey'):
        cmd.requires_wallet = False
        cmd.requires_password = False

    if cmdname in ['payto', 'paytomany'] and config.get('unsigned'):
        cmd.requires_password = False

    if cmdname in ['payto', 'paytomany'] and config.get('broadcast'):
        cmd.requires_network = True

    if cmdname in ['createrawtx'] and config.get('unsigned'):
        cmd.requires_password = False
        cmd.requires_wallet = False

    # instanciate wallet for command-line
    storage = WalletStorage(config.get_wallet_path())

    if cmd.requires_wallet and not storage.file_exists:
        print_msg("Error: Wallet file not found.")
        print_msg("Type 'electrum create' to create a new wallet, or provide a path to a wallet with the -w option")
        sys.exit(0)

    # important warning
    if cmd.name in ['getprivatekeys']:
        print_stderr("WARNING: ALL your private keys are secret.")
        print_stderr("Exposing a single private key can compromise your entire wallet!")
        print_stderr("In particular, DO NOT use 'redeem private key' services proposed by third parties.")

    # commands needing password
    if cmd.requires_password and storage.get('use_encryption'):
        if config.get('password'):
            password = config.get('password')
        else:
            password = prompt_password('Password:', False)
            if not password:
                print_msg("Error: Password required")
                sys.exit(1)
    else:
        password = None

    config_options['password'] = password

    if cmd.name == 'password':
        new_password = prompt_password('New password:')
        config_options['new_password'] = new_password

    return cmd, password


def run_offline_command(config, config_options):
    cmdname = config.get('cmd')
    cmd = known_commands[cmdname]
    storage = WalletStorage(config.get_wallet_path())
    wallet = Wallet(storage) if cmd.requires_wallet else None
    # check password
    if cmd.requires_password and storage.get('use_encryption'):
        password = config_options.get('password')
        try:
            seed = wallet.check_password(password)
        except InvalidPassword:
            print_msg("Error: This password does not decode this wallet.")
            sys.exit(1)
    if cmd.requires_network:
        print_stderr("Warning: running command offline")
    # arguments passed to function
    args = map(lambda x: config.get(x), cmd.params)
    # decode json arguments
    args = map(json_decode, args)
    # options
    args += map(lambda x: config.get(x), cmd.options)
    cmd_runner = Commands(config, wallet, None,
                          password=config_options.get('password'),
                          new_password=config_options.get('new_password'))
    func = getattr(cmd_runner, cmd.name)
    result = func(*args)
    # save wallet
    if wallet:
        wallet.storage.write()
    return result


if __name__ == '__main__':

    # make sure that certificates are here
    assert os.path.exists(requests.utils.DEFAULT_CA_BUNDLE_PATH)

    # on osx, delete Process Serial Number arg generated for apps launched in Finder
    sys.argv = filter(lambda x: not x.startswith('-psn'), sys.argv)

    # old 'help' syntax
    if len(sys.argv)>1 and sys.argv[1] == 'help':
        sys.argv.remove('help')
        sys.argv.append('-h')

    # read arguments from stdin pipe and prompt
    for i, arg in enumerate(sys.argv):
        if arg == '-':
            if not sys.stdin.isatty():
                sys.argv[i] = sys.stdin.read()
                break
            else:
                raise BaseException('Cannot get argument from stdin')
        elif arg == '?':
            sys.argv[i] = raw_input("Enter argument:")
        elif arg == ':':
            sys.argv[i] = prompt_password('Enter argument (will not echo):', False)

    # parse command line
    parser = get_parser()
    args = parser.parse_args()

    # config is an object passed to the various constructors (wallet, interface, gui)
    if is_android:
        config_options = {
            'verbose': True,
            'cmd': 'gui',
            'gui': 'kivy' if is_kivy else 'android',
            #'auto_connect': True,
        }
    else:
        config_options = args.__dict__
        for k, v in config_options.items():
            if v is None or (k in config_variables.get(args.cmd, {}).keys()):
                config_options.pop(k)
        if config_options.get('server'):
            config_options['auto_connect'] = False

    if config_options.get('portable'):
        config_options['electrum_path'] = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'electrum_data')

    set_verbosity(config_options.get('verbose'))

    # check uri
    uri = config_options.get('url')
    if uri:
        if not uri.startswith('bitcoin:'):
            print_stderr('unknown command:', uri)
            sys.exit(1)
        config_options['url'] = uri

    config = SimpleConfig(config_options)
    cmdname = config.get('cmd')

    # initialize plugins.
    gui_name = config.get('gui', 'qt') if cmdname == 'gui' else 'cmdline'
    plugins = Plugins(config, is_bundle or is_local or is_android, gui_name)

    # run non-RPC commands separately
    if cmdname in ['create', 'restore', 'deseed']:
        run_non_RPC(config)
        sys.exit(0)

    # check if a daemon is running
    server = get_daemon(config)

    if cmdname == 'gui':
        if server is not None:
            result = server.gui(config_options)
        else:
            if not config.get('offline'):
                network = Network(config)
                network.start()
            else:
                network = None
            daemon = Daemon(config, network)
            daemon.start()
            gui = init_gui(config, network, daemon, plugins)
            daemon.gui = gui
            gui.main()
            sys.exit(0)

    elif cmdname == 'daemon':
        if server is not None:
            result = server.daemon(config_options)
        else:
            subcommand = config.get('subcommand')
            if subcommand in ['status', 'stop']:
                print_msg("Daemon not running")
                sys.exit(1)
            elif subcommand == 'start':
                p = os.fork()
                if p == 0:
                    network = Network(config)
                    network.start()
                    daemon = Daemon(config, network)
                    if config.get('websocket_server'):
                        from lbryum import websockets
                        websockets.WebSocketServer(config, network).start()
                    if config.get('requests_dir'):
                        util.check_www_dir(config.get('requests_dir'))
                    daemon.start()
                    daemon.join()
                    sys.exit(0)
                else:
                    print_stderr("starting daemon (PID %d)"%p)
                    sys.exit(0)
            else:
                print_msg("syntax: electrum daemon <start|status|stop>")
                sys.exit(1)

    else:
        # command line
        init_cmdline(config_options)
        if server is not None:
            result = server.run_cmdline(config_options)
        else:
            cmd = known_commands[cmdname]
            if cmd.requires_network:
                print_msg("Network daemon is not running. Try 'electrum daemon start'")
                sys.exit(1)
            else:
                result = run_offline_command(config, config_options)

    # print result
    if type(result) in [str, unicode]:
        print_msg(result)
    elif type(result) is dict and result.get('error'):
        print_stderr(result.get('error'))
    elif result is not None:
        print_msg(json_encode(result))
    sys.exit(0)