#!/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 sys
import time
import jsonrpclib
from jsonrpclib.SimpleJSONRPCServer import SimpleJSONRPCServer, SimpleJSONRPCRequestHandler
from version import ELECTRUM_VERSION
from network import Network
from util import json_decode, DaemonThread
from util import print_msg, print_error, print_stderr
from wallet import WalletStorage, Wallet
from commands import known_commands, Commands
from simple_config import SimpleConfig
from plugins import run_hook
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), 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())
server = jsonrpclib.Server('http://%s:%d' % (host, port))
# Test daemon is running
server.ping()
return server
except:
pass
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)
class RequestHandler(SimpleJSONRPCRequestHandler):
def do_OPTIONS(self):
self.send_response(200)
self.end_headers()
def end_headers(self):
self.send_header("Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept")
self.send_header("Access-Control-Allow-Origin", "*")
SimpleJSONRPCRequestHandler.end_headers(self)
class Daemon(DaemonThread):
def __init__(self, config, fd):
DaemonThread.__init__(self)
self.config = config
if config.get('offline'):
self.network = None
self.fx = None
else:
self.network = Network(config)
self.network.start()
self.fx = FxThread(config, self.network)
self.network.add_jobs([self.fx])
self.gui = None
self.wallets = {}
# Setup JSONRPC server
path = config.get_wallet_path()
default_wallet = self.load_wallet(path)
self.cmd_runner = Commands(self.config, default_wallet, self.network)
self.init_server(config, fd)
def init_server(self, config, fd):
host = config.get('rpchost', '127.0.0.1')
port = config.get('rpcport', 0)
try:
server = SimpleJSONRPCServer((host, port), logRequests=False,
requestHandler=RequestHandler)
except:
self.print_error('Warning: cannot initialize RPC server on host', host)
self.server = None
os.close(fd)
return
os.write(fd, repr((server.socket.getsockname(), time.time())))
os.close(fd)
server.timeout = 0.1
for cmdname in known_commands:
server.register_function(getattr(self.cmd_runner, cmdname), cmdname)
server.register_function(self.run_cmdline, 'run_cmdline')
server.register_function(self.ping, 'ping')
server.register_function(self.run_daemon, 'daemon')
server.register_function(self.run_gui, 'gui')
self.server = server
def ping(self):
return True
def run_daemon(self, config):
sub = config.get('subcommand')
assert sub in [None, 'start', 'stop', 'status']
if sub in [None, 'start']:
response = "Daemon already running"
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()},
}
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"
else:
response = "Error: Electrum is running in daemon mode. Please stop the daemon first."
return response
def load_wallet(self, path):
# wizard will be launched if we return
if path in self.wallets:
wallet = self.wallets[path]
return wallet
storage = WalletStorage(path)
if not storage.file_exists:
return
if storage.requires_split():
return
if storage.requires_upgrade():
self.print_error('upgrading wallet format')
storage.upgrade()
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 stop_wallet(self, path):
wallet = self.wallets.pop(path)
wallet.stop_threads()
def run_cmdline(self, config_options):
config = SimpleConfig(config_options)
cmdname = config.get('cmd')
cmd = known_commands[cmdname]
path = config.get_wallet_path()
wallet = self.load_wallet(path) if cmd.requires_wallet else None
# 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, self.network,
password=config_options.get('password'),
new_password=config_options.get('new_password'))
func = getattr(cmd_runner, cmd.name)
result = func(*args)
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)
self.gui.main()