#!/usr/bin/env python # # Electrum - lightweight Bitcoin client # Copyright (C) 2015 Thomas Voegtlin # # Permission is hereby granted, free of charge, to any person # obtaining a copy of this software and associated documentation files # (the "Software"), to deal in the Software without restriction, # including without limitation the rights to use, copy, modify, merge, # publish, distribute, sublicense, and/or sell copies of the Software, # and to permit persons to whom the Software is furnished to do so, # subject to the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS # BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE # SOFTWARE. import ast import os import time import traceback import sys # from jsonrpc import JSONRPCResponseManager import jsonrpclib from .jsonrpc import VerifyingJSONRPCServer from .version import ELECTRUM_VERSION from .network import Network from .util import json_decode, DaemonThread from .util import print_error, to_string from .wallet import Wallet from .storage import WalletStorage from .commands import known_commands, Commands from .simple_config import SimpleConfig from .exchange_rate import FxThread def get_lockfile(config): return os.path.join(config.path, 'daemon') def remove_lockfile(lockfile): os.unlink(lockfile) def get_fd_or_server(config): '''Tries to create the lockfile, using O_EXCL to prevent races. If it succeeds it returns the FD. Otherwise try and connect to the server specified in the lockfile. If this succeeds, the server is returned. Otherwise remove the lockfile and try again.''' lockfile = get_lockfile(config) while True: try: return os.open(lockfile, os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o644), None except OSError: pass server = get_server(config) if server is not None: return None, server # Couldn't connect; remove lockfile and try again. remove_lockfile(lockfile) def get_server(config): lockfile = get_lockfile(config) while True: create_time = None try: with open(lockfile) as f: (host, port), create_time = ast.literal_eval(f.read()) rpc_user, rpc_password = get_rpc_credentials(config) if rpc_password == '': # authentication disabled server_url = 'http://%s:%d' % (host, port) else: server_url = 'http://%s:%s@%s:%d' % ( rpc_user, rpc_password, host, port) server = jsonrpclib.Server(server_url) # Test daemon is running server.ping() return server except Exception as e: print_error("[get_server]", e) if not create_time or create_time < time.time() - 1.0: return None # Sleep a bit and try again; it might have just been started time.sleep(1.0) def get_rpc_credentials(config): rpc_user = config.get('rpcuser', None) rpc_password = config.get('rpcpassword', None) if rpc_user is None or rpc_password is None: rpc_user = 'user' import ecdsa, base64 bits = 128 nbytes = bits // 8 + (bits % 8 > 0) pw_int = ecdsa.util.randrange(pow(2, bits)) pw_b64 = base64.b64encode( pw_int.to_bytes(nbytes, 'big'), b'-_') rpc_password = to_string(pw_b64, 'ascii') config.set_key('rpcuser', rpc_user) config.set_key('rpcpassword', rpc_password, save=True) elif rpc_password == '': from .util import print_stderr print_stderr('WARNING: RPC authentication is disabled.') return rpc_user, rpc_password class Daemon(DaemonThread): def __init__(self, config, fd, is_gui): DaemonThread.__init__(self) self.config = config if config.get('offline'): self.network = None else: self.network = Network(config) self.network.start() self.fx = FxThread(config, self.network) if self.network: self.network.add_jobs([self.fx]) self.gui = None self.wallets = {} # Setup JSONRPC server self.init_server(config, fd, is_gui) def init_server(self, config, fd, is_gui): host = config.get('rpchost', '127.0.0.1') port = config.get('rpcport', 0) rpc_user, rpc_password = get_rpc_credentials(config) try: server = VerifyingJSONRPCServer((host, port), logRequests=False, rpc_user=rpc_user, rpc_password=rpc_password) except Exception as e: self.print_error('Warning: cannot initialize RPC server on host', host, e) self.server = None os.close(fd) return os.write(fd, bytes(repr((server.socket.getsockname(), time.time())), 'utf8')) os.close(fd) self.server = server server.timeout = 0.1 server.register_function(self.ping, 'ping') if is_gui: server.register_function(self.run_gui, 'gui') else: server.register_function(self.run_daemon, 'daemon') self.cmd_runner = Commands(self.config, None, self.network) for cmdname in known_commands: server.register_function(getattr(self.cmd_runner, cmdname), cmdname) server.register_function(self.run_cmdline, 'run_cmdline') def ping(self): return True def run_daemon(self, config_options): config = SimpleConfig(config_options) sub = config.get('subcommand') assert sub in [None, 'start', 'stop', 'status', 'load_wallet', 'close_wallet'] if sub in [None, 'start']: response = "Daemon already running" elif sub == 'load_wallet': path = config.get_wallet_path() wallet = self.load_wallet(path, config.get('password')) self.cmd_runner.wallet = wallet response = wallet is not None elif sub == 'close_wallet': path = config.get_wallet_path() if path in self.wallets: self.stop_wallet(path) response = True else: response = False elif sub == 'status': if self.network: p = self.network.get_parameters() response = { 'path': self.network.config.path, 'server': p[0], 'blockchain_height': self.network.get_local_height(), 'server_height': self.network.get_server_height(), 'spv_nodes': len(self.network.get_interfaces()), 'connected': self.network.is_connected(), 'auto_connect': p[4], 'version': ELECTRUM_VERSION, 'wallets': {k: w.is_up_to_date() for k, w in self.wallets.items()}, 'fee_per_kb': self.config.fee_per_kb(), } else: response = "Daemon offline" elif sub == 'stop': self.stop() response = "Daemon stopped" return response def run_gui(self, config_options): config = SimpleConfig(config_options) if self.gui: #if hasattr(self.gui, 'new_window'): # path = config.get_wallet_path() # self.gui.new_window(path, config.get('url')) # response = "ok" #else: # response = "error: current GUI does not support multiple windows" response = "error: Electrum GUI already running" else: response = "Error: Electrum is running in daemon mode. Please stop the daemon first." return response def load_wallet(self, path, password): # wizard will be launched if we return if path in self.wallets: wallet = self.wallets[path] return wallet storage = WalletStorage(path, manual_upgrades=True) if not storage.file_exists(): return if storage.is_encrypted(): if not password: return storage.decrypt(password) if storage.requires_split(): return if storage.requires_upgrade(): return if storage.get_action(): return wallet = Wallet(storage) wallet.start_threads(self.network) self.wallets[path] = wallet return wallet def add_wallet(self, wallet): path = wallet.storage.path self.wallets[path] = wallet def get_wallet(self, path): return self.wallets.get(path) def stop_wallet(self, path): wallet = self.wallets.pop(path) wallet.stop_threads() def run_cmdline(self, config_options): password = config_options.get('password') new_password = config_options.get('new_password') config = SimpleConfig(config_options) config.fee_estimates = self.network.config.fee_estimates.copy() cmdname = config.get('cmd') cmd = known_commands[cmdname] if cmd.requires_wallet: path = config.get_wallet_path() wallet = self.wallets.get(path) if wallet is None: return {'error': 'Wallet "%s" is not loaded. Use "electrum daemon load_wallet"'%os.path.basename(path) } else: wallet = None # arguments passed to function args = map(lambda x: config.get(x), cmd.params) # decode json arguments args = [json_decode(i) for i in args] # options kwargs = {} for x in cmd.options: kwargs[x] = (config_options.get(x) if x in ['password', 'new_password'] else config.get(x)) cmd_runner = Commands(config, wallet, self.network) func = getattr(cmd_runner, cmd.name) result = func(*args, **kwargs) return result def run(self): while self.is_running(): self.server.handle_request() if self.server else time.sleep(0.1) for k, wallet in self.wallets.items(): wallet.stop_threads() if self.network: self.print_error("shutting down network") self.network.stop() self.network.join() self.on_stop() def stop(self): self.print_error("stopping, removing lockfile") remove_lockfile(get_lockfile(self.config)) DaemonThread.stop(self) def init_gui(self, config, plugins): gui_name = config.get('gui', 'qt') if gui_name in ['lite', 'classic']: gui_name = 'qt' gui = __import__('electrum_gui.' + gui_name, fromlist=['electrum_gui']) self.gui = gui.ElectrumGui(config, self, plugins) try: self.gui.main() except BaseException as e: traceback.print_exc(file=sys.stdout) # app will exit now