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-WIP-electrum-btcp
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-WIP-electrum-btcp/server/server.py

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#!/usr/bin/env python
# Copyright(C) 2012 thomasv@gitorious
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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
# Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with this program. If not, see
# <http://www.gnu.org/licenses/agpl.html>.
"""
Todo:
* server should check and return bitcoind status..
* improve txpoint sorting
* command to check cache
mempool transactions do not need to be added to the database; it slows it down
"""
import time, json, socket, operator, thread, ast, sys,re
import ConfigParser
from json import dumps, loads
import urllib
# we need to import electrum
sys.path.append('../client/')
from wallet import Wallet
from interface import Interface
config = ConfigParser.ConfigParser()
# set some defaults, which will be overwritten by the config file
config.add_section('server')
config.set('server','banner', 'Welcome to Electrum!')
config.set('server', 'host', 'localhost')
config.set('server', 'port', '50000')
config.set('server', 'password', '')
config.set('server', 'irc', 'yes')
config.set('server', 'ircname', 'Electrum server')
config.add_section('database')
config.set('database', 'type', 'psycopg2')
config.set('database', 'database', 'abe')
try:
f = open('/etc/electrum.conf','r')
config.readfp(f)
f.close()
except:
print "Could not read electrum.conf. I will use the default values."
try:
f = open('/etc/electrum.banner','r')
config.set('server','banner', f.read())
f.close()
except:
pass
password = config.get('server','password')
stopping = False
block_number = -1
old_block_number = -1
sessions = {}
sessions_sub_numblocks = {} # sessions that have subscribed to the service
m_sessions = [{}] # served by http
peer_list = {}
wallets = {} # for ultra-light clients such as bccapi
from Queue import Queue
input_queue = Queue()
output_queue = Queue()
address_queue = Queue()
class Direct_Interface(Interface):
def __init__(self):
pass
def handler(self, method, params = ''):
cmds = {'session.new':new_session,
'session.poll':poll_session,
'session.update':update_session,
'transaction.broadcast':send_tx,
'address.get_history':store.get_history
}
func = cmds[method]
return func( params )
def send_tx(tx):
postdata = dumps({"method": 'importtransaction', 'params': [tx], 'id':'jsonrpc'})
respdata = urllib.urlopen(bitcoind_url, postdata).read()
r = loads(respdata)
if r['error'] != None:
out = "error: transaction rejected by memorypool\n"+tx
else:
out = r['result']
return out
def random_string(N):
import random, string
return ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(N))
def cmd_stop(_,__,pw):
global stopping
if password == pw:
stopping = True
return 'ok'
else:
return 'wrong password'
def cmd_load(_,__,pw):
if password == pw:
return repr( len(sessions) )
else:
return 'wrong password'
def modified_addresses(session):
if 1:
t1 = time.time()
addresses = session['addresses']
session['last_time'] = time.time()
ret = {}
k = 0
for addr in addresses:
status = get_address_status( addr )
msg_id, last_status = addresses.get( addr )
if last_status != status:
addresses[addr] = msg_id, status
ret[addr] = status
t2 = time.time() - t1
#if t2 > 10: print "high load:", session_id, "%d/%d"%(k,len(addresses)), t2
return ret, addresses
def poll_session(session_id):
# native
session = sessions.get(session_id)
if session is None:
print time.asctime(), "session not found", session_id
return -1, {}
else:
ret, addresses = modified_addresses(session)
if ret: sessions[session_id]['addresses'] = addresses
return repr( (block_number,ret))
def poll_session_json(session_id, message_id):
session = m_sessions[0].get(session_id)
if session is None:
raise BaseException("session not found %s"%session_id)
else:
out = []
ret, addresses = modified_addresses(session)
if ret:
m_sessions[0][session_id]['addresses'] = addresses
for addr in ret:
msg_id, status = addresses[addr]
out.append( { 'id':msg_id, 'result':status } )
msg_id, last_nb = session.get('numblocks')
if last_nb:
if last_nb != block_number:
m_sessions[0][session_id]['numblocks'] = msg_id, block_number
out.append( {'id':msg_id, 'result':block_number} )
return out
def do_update_address(addr):
# an address was involved in a transaction; we check if it was subscribed to in a session
# the address can be subscribed in several sessions; the cache should ensure that we don't do redundant requests
for session_id in sessions.keys():
session = sessions[session_id]
if session.get('type') != 'persistent': continue
addresses = session['addresses'].keys()
if addr in addresses:
status = get_address_status( addr )
message_id, last_status = session['addresses'][addr]
if last_status != status:
#print "sending new status for %s:"%addr, status
send_status(session_id,message_id,addr,status)
sessions[session_id]['addresses'][addr] = (message_id,status)
def get_address_status(addr):
# get address status, i.e. the last block for that address.
tx_points = store.get_history(addr)
if not tx_points:
status = None
else:
lastpoint = tx_points[-1]
status = lastpoint['blk_hash']
# this is a temporary hack; move it up once old clients have disappeared
if status == 'mempool': # and session['version'] != "old":
status = status + ':%d'% len(tx_points)
return status
def send_numblocks(session_id):
message_id = sessions_sub_numblocks[session_id]
out = json.dumps( {'id':message_id, 'result':block_number} )
output_queue.put((session_id, out))
def send_status(session_id, message_id, address, status):
out = json.dumps( { 'id':message_id, 'result':status } )
output_queue.put((session_id, out))
def address_get_history_json(_,message_id,address):
return store.get_history(address)
def subscribe_to_numblocks(session_id, message_id):
sessions_sub_numblocks[session_id] = message_id
send_numblocks(session_id)
def subscribe_to_numblocks_json(session_id, message_id):
global m_sessions
m_sessions[0][session_id]['numblocks'] = message_id,block_number
return block_number
def subscribe_to_address(session_id, message_id, address):
status = get_address_status(address)
sessions[session_id]['addresses'][address] = (message_id, status)
sessions[session_id]['last_time'] = time.time()
send_status(session_id, message_id, address, status)
def add_address_to_session_json(session_id, message_id, address):
global m_sessions
sessions = m_sessions[0]
status = get_address_status(address)
sessions[session_id]['addresses'][address] = (message_id, status)
sessions[session_id]['last_time'] = time.time()
m_sessions[0] = sessions
return status
def add_address_to_session(session_id, address):
status = get_address_status(address)
sessions[session_id]['addresses'][addr] = ("", status)
sessions[session_id]['last_time'] = time.time()
return status
def new_session(version, addresses):
session_id = random_string(10)
sessions[session_id] = { 'addresses':{}, 'version':version }
for a in addresses:
sessions[session_id]['addresses'][a] = ('','')
out = repr( (session_id, config.get('server','banner').replace('\\n','\n') ) )
sessions[session_id]['last_time'] = time.time()
return out
def client_version_json(session_id, _, version):
global m_sessions
sessions = m_sessions[0]
sessions[session_id]['version'] = version
m_sessions[0] = sessions
def create_session_json(_, __):
sessions = m_sessions[0]
session_id = random_string(10)
print "creating session", session_id
sessions[session_id] = { 'addresses':{}, 'numblocks':('','') }
sessions[session_id]['last_time'] = time.time()
m_sessions[0] = sessions
return session_id
def get_banner(_,__):
return config.get('server','banner').replace('\\n','\n')
def update_session(session_id,addresses):
"""deprecated in 0.42"""
sessions[session_id]['addresses'] = {}
for a in addresses:
sessions[session_id]['addresses'][a] = ''
sessions[session_id]['last_time'] = time.time()
return 'ok'
def native_server_thread():
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((config.get('server','host'), config.getint('server','port')))
s.listen(1)
while not stopping:
conn, addr = s.accept()
try:
thread.start_new_thread(native_client_thread, (addr, conn,))
except:
# can't start new thread if there is no memory..
traceback.print_exc(file=sys.stdout)
def native_client_thread(ipaddr,conn):
#print "client thread", ipaddr
try:
ipaddr = ipaddr[0]
msg = ''
while 1:
d = conn.recv(1024)
msg += d
if not d:
break
if '#' in msg:
msg = msg.split('#', 1)[0]
break
try:
cmd, data = ast.literal_eval(msg)
except:
print "syntax error", repr(msg), ipaddr
conn.close()
return
out = do_command(cmd, data, ipaddr)
if out:
#print ipaddr, cmd, len(out)
try:
conn.send(out)
except:
print "error, could not send"
finally:
conn.close()
def timestr():
return time.strftime("[%d/%m/%Y-%H:%M:%S]")
# used by the native handler
def do_command(cmd, data, ipaddr):
if cmd=='b':
out = "%d"%block_number
elif cmd in ['session','new_session']:
try:
if cmd == 'session':
addresses = ast.literal_eval(data)
version = "old"
else:
version, addresses = ast.literal_eval(data)
if version[0]=="0": version = "v" + version
except:
print "error", data
return None
print timestr(), "new session", ipaddr, addresses[0] if addresses else addresses, len(addresses), version
out = new_session(version, addresses)
elif cmd=='address.subscribe':
try:
session_id, addr = ast.literal_eval(data)
except:
print "error"
return None
out = add_address_to_session(session_id,addr)
elif cmd=='update_session':
try:
session_id, addresses = ast.literal_eval(data)
except:
print "error"
return None
print timestr(), "update session", ipaddr, addresses[0] if addresses else addresses, len(addresses)
out = update_session(session_id,addresses)
elif cmd == 'bccapi_login':
import electrum
print "data",data
v, k = ast.literal_eval(data)
master_public_key = k.decode('hex') # todo: sanitize. no need to decode twice...
print master_public_key
wallet_id = random_string(10)
w = Wallet( Direct_Interface() )
w.master_public_key = master_public_key.decode('hex')
w.synchronize()
wallets[wallet_id] = w
out = wallet_id
print "wallets", wallets
elif cmd == 'bccapi_getAccountInfo':
from wallet import int_to_hex
v, wallet_id = ast.literal_eval(data)
w = wallets.get(wallet_id)
if w is not None:
num = len(w.addresses)
c, u = w.get_balance()
out = int_to_hex(num,4) + int_to_hex(c,8) + int_to_hex( c+u, 8 )
out = out.decode('hex')
else:
print "error",data
out = "error"
elif cmd == 'bccapi_getAccountStatement':
from wallet import int_to_hex
v, wallet_id = ast.literal_eval(data)
w = wallets.get(wallet_id)
if w is not None:
num = len(w.addresses)
c, u = w.get_balance()
total_records = num_records = 0
out = int_to_hex(num,4) + int_to_hex(c,8) + int_to_hex( c+u, 8 ) + int_to_hex( total_records ) + int_to_hex( num_records )
out = out.decode('hex')
else:
print "error",data
out = "error"
elif cmd == 'bccapi_getSendCoinForm':
out = ''
elif cmd == 'bccapi_submitTransaction':
out = ''
elif cmd=='poll':
out = poll_session(data)
elif cmd == 'h':
# history
address = data
out = repr( store.get_history( address ) )
elif cmd == 'load':
out = cmd_load(data)
elif cmd =='tx':
out = send_tx(data)
print timestr(), "sent tx:", ipaddr, out
elif cmd == 'stop':
out = cmd_stop(data)
elif cmd == 'peers':
out = repr(peer_list.values())
else:
out = None
return out
####################################################################
def tcp_server_thread():
thread.start_new_thread(process_input_queue, ())
thread.start_new_thread(process_output_queue, ())
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((config.get('server','host'), 50001))
s.listen(1)
while not stopping:
conn, addr = s.accept()
try:
thread.start_new_thread(tcp_client_thread, (addr, conn,))
except:
# can't start new thread if there is no memory..
traceback.print_exc(file=sys.stdout)
def close_session(session_id):
#print "lost connection", session_id
sessions.pop(session_id)
if session_id in sessions_sub_numblocks:
sessions_sub_numblocks.pop(session_id)
# one thread per client. put requests in a queue.
def tcp_client_thread(ipaddr,conn):
""" use a persistent connection. put commands in a queue."""
print timestr(), "TCP session", ipaddr
global sessions
session_id = random_string(10)
sessions[session_id] = { 'conn':conn, 'addresses':{}, 'version':'unknown', 'type':'persistent' }
ipaddr = ipaddr[0]
msg = ''
while not stopping:
try:
d = conn.recv(1024)
except socket.error:
d = ''
if not d:
close_session(session_id)
break
msg += d
while True:
s = msg.find('\n')
if s ==-1:
break
else:
c = msg[0:s].strip()
msg = msg[s+1:]
if c == 'quit':
conn.close()
close_session(session_id)
return
try:
c = json.loads(c)
except:
print "json error", repr(c)
continue
try:
message_id = c.get('id')
method = c.get('method')
params = c.get('params')
except:
print "syntax error", repr(c), ipaddr
continue
# add to queue
input_queue.put((session_id, message_id, method, params))
# read commands from the input queue. perform requests, etc. this should be called from the main thread.
def process_input_queue():
while not stopping:
session_id, message_id, method, data = input_queue.get()
if session_id not in sessions.keys():
continue
out = None
if method == 'address.subscribe':
address = data[0]
subscribe_to_address(session_id,message_id,address)
elif method == 'numblocks.subscribe':
subscribe_to_numblocks(session_id,message_id)
elif method == 'client.version':
sessions[session_id]['version'] = data[0]
elif method == 'server.banner':
out = { 'result':config.get('server','banner').replace('\\n','\n') }
elif method == 'server.peers':
out = { 'result':peer_list.values() }
elif method == 'address.get_history':
address = data[0]
out = { 'result':store.get_history( address ) }
elif method == 'transaction.broadcast':
postdata = dumps({"method": 'importtransaction', 'params': [data], 'id':'jsonrpc'})
txo = urllib.urlopen(bitcoind_url, postdata).read()
print "sent tx:", txo
out = json.loads(txo)
else:
print "unknown command", method
if out:
out['id'] = message_id
out = json.dumps( out )
output_queue.put((session_id, out))
# this is a separate thread
def process_output_queue():
while not stopping:
session_id, out = output_queue.get()
session = sessions.get(session_id)
if session:
try:
conn = session.get('conn')
conn.send(out+'\n')
except:
close_session(session_id)
####################################################################
def clean_session_thread():
while not stopping:
time.sleep(30)
t = time.time()
for k,s in sessions.items():
if s.get('type') == 'persistent': continue
t0 = s['last_time']
if t - t0 > 5*60:
sessions.pop(k)
print "lost session", k
def irc_thread():
global peer_list
NICK = 'E_'+random_string(10)
while not stopping:
try:
s = socket.socket()
s.connect(('irc.freenode.net', 6667))
s.send('USER electrum 0 * :'+config.get('server','host')+' '+config.get('server','ircname')+'\n')
s.send('NICK '+NICK+'\n')
s.send('JOIN #electrum\n')
sf = s.makefile('r', 0)
t = 0
while not stopping:
line = sf.readline()
line = line.rstrip('\r\n')
line = line.split()
if line[0]=='PING':
s.send('PONG '+line[1]+'\n')
elif '353' in line: # answer to /names
k = line.index('353')
for item in line[k+1:]:
if item[0:2] == 'E_':
s.send('WHO %s\n'%item)
elif '352' in line: # answer to /who
# warning: this is a horrible hack which apparently works
k = line.index('352')
ip = line[k+4]
ip = socket.gethostbyname(ip)
name = line[k+6]
host = line[k+9]
peer_list[name] = (ip,host)
if time.time() - t > 5*60:
s.send('NAMES #electrum\n')
t = time.time()
peer_list = {}
except:
traceback.print_exc(file=sys.stdout)
finally:
sf.close()
s.close()
def get_peers_json(_,__):
return peer_list.values()
def http_server_thread():
# see http://code.google.com/p/jsonrpclib/
from SocketServer import ThreadingMixIn
from StratumJSONRPCServer import StratumJSONRPCServer
class StratumThreadedJSONRPCServer(ThreadingMixIn, StratumJSONRPCServer): pass
server = StratumThreadedJSONRPCServer(( config.get('server','host'), 8081))
server.register_function(get_peers_json, 'server.peers')
server.register_function(cmd_stop, 'stop')
server.register_function(cmd_load, 'load')
server.register_function(get_banner, 'server.banner')
server.register_function(lambda a,b,c: send_tx(c), 'transaction.broadcast')
server.register_function(address_get_history_json, 'address.get_history')
server.register_function(add_address_to_session_json, 'address.subscribe')
server.register_function(subscribe_to_numblocks_json, 'numblocks.subscribe')
server.register_function(client_version_json, 'client.version')
server.register_function(create_session_json, 'session.create') # internal message (not part of protocol)
server.register_function(poll_session_json, 'session.poll') # internal message (not part of protocol)
server.serve_forever()
import traceback
if __name__ == '__main__':
if len(sys.argv)>1:
import jsonrpclib
server = jsonrpclib.Server('http://%s:8081'%config.get('server','host'))
cmd = sys.argv[1]
if cmd == 'load':
out = server.load(password)
elif cmd == 'peers':
out = server.server.peers()
elif cmd == 'stop':
out = server.stop(password)
elif cmd == 'clear_cache':
out = server.clear_cache(password)
elif cmd == 'get_cache':
out = server.get_cache(password,sys.argv[2])
elif cmd == 'h':
out = server.address.get_history(sys.argv[2])
elif cmd == 'tx':
out = server.transaction.broadcast(sys.argv[2])
elif cmd == 'b':
out = server.numblocks.subscribe()
else:
out = "Unknown command: '%s'" % cmd
print out
sys.exit(0)
# backend
import db
store = db.MyStore(config,address_queue)
# supported protocols
thread.start_new_thread(native_server_thread, ())
thread.start_new_thread(tcp_server_thread, ())
thread.start_new_thread(http_server_thread, ())
thread.start_new_thread(clean_session_thread, ())
if (config.get('server','irc') == 'yes' ):
thread.start_new_thread(irc_thread, ())
print "starting Electrum server"
while not stopping:
block_number = store.main_iteration()
if block_number != old_block_number:
old_block_number = block_number
for session_id in sessions_sub_numblocks.keys():
send_numblocks(session_id)
# do addresses
while True:
try:
addr = address_queue.get(False)
except:
break
do_update_address(addr)
time.sleep(10)
print "server stopped"
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