server.py

   1 #!/usr/bin/env python
   2 # Copyright(C) 2011 thomasv@gitorious
   3
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU Affero General Public License as
   6 # published by the Free Software Foundation, either version 3 of the
   7 # License, or (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Affero General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public
  15 # License along with this program.  If not, see
  16 # <http://www.gnu.org/licenses/agpl.html>.
  17
  18 """
  19 Todo:
  20    * server should check and return bitcoind status..
  21    * improve txpoint sorting
  22    * command to check cache
  23
  24  mempool transactions do not need to be added to the database; it slows it down
  25 """
  26
  27
  28 import time, json, socket, operator, thread, ast, sys,re
  29 import psycopg2, binascii
  30
  31 from Abe.abe import hash_to_address, decode_check_address
  32 from Abe.DataStore import DataStore as Datastore_class
  33 from Abe import DataStore, readconf, BCDataStream,  deserialize, util, base58
  34
  35 import ConfigParser
  36 from json import dumps, loads
  37 import urllib
  38
  39 # we need to import electrum
  40 sys.path.append('../client/')
  41 from wallet import Wallet
  42 from interface import Interface
  43
  44
  45 config = ConfigParser.ConfigParser()
  46 # set some defaults, which will be overwritten by the config file
  47 config.add_section('server')
  48 config.set('server','banner', 'Welcome to Electrum!')
  49 config.set('server', 'host', 'localhost')
  50 config.set('server', 'port', 50000)
  51 config.set('server', 'password', '')
  52 config.set('server', 'irc', 'yes')
  53 config.set('server', 'ircname', 'Electrum server')
  54 config.add_section('database')
  55 config.set('database', 'type', 'psycopg2')
  56 config.set('database', 'database', 'abe')
  57
  58 try:
  59     f = open('/etc/electrum.conf','r')
  60     config.readfp(f)
  61     f.close()
  62 except:
  63     print "Could not read electrum.conf. I will use the default values."
  64
  65 try:
  66     f = open('/etc/electrum.banner','r')
  67     config.set('server','banner', f.read())
  68     f.close()
  69 except:
  70     pass
  71
  72 password = config.get('server','password')
  73 bitcoind_url = 'http://%s:%s@%s:%s/' % ( config.get('bitcoind','user'), config.get('bitcoind','password'), config.get('bitcoind','host'), config.get('bitcoind','port'))
  74
  75 stopping = False
  76 block_number = -1
  77 old_block_number = -1
  78 sessions = {}
  79 sessions_sub_numblocks = {} # sessions that have subscribed to the service
  80
  81 m_sessions = [{}] # served by http
  82
  83 dblock = thread.allocate_lock()
  84 peer_list = {}
  85
  86 wallets = {} # for ultra-light clients such as bccapi
  87
  88 from Queue import Queue
  89 input_queue = Queue()
  90 output_queue = Queue()
  91 address_queue = Queue()
  92
  93
  94
  95 class MyStore(Datastore_class):
  96
  97     def import_block(self, b, chain_ids=frozenset()):
  98         block_id = super(MyStore, self).import_block(b, chain_ids)
  99         #print "block", block_id
 100         for pos in xrange(len(b['transactions'])):
 101             tx = b['transactions'][pos]
 102             if 'hash' not in tx:
 103                 tx['hash'] = util.double_sha256(tx['tx'])
 104             tx_id = store.tx_find_id_and_value(tx)
 105             if tx_id:
 106                 self.update_tx_cache(tx_id)
 107             else:
 108                 print "error: import_block: no tx_id"
 109         return block_id
 110
 111
 112     def update_tx_cache(self, txid):
 113         inrows = self.get_tx_inputs(txid, False)
 114         for row in inrows:
 115             _hash = store.binout(row[6])
 116             address = hash_to_address(chr(0), _hash)
 117             if self.tx_cache.has_key(address):
 118                 print "cache: invalidating", address
 119                 self.tx_cache.pop(address)
 120             address_queue.put(address)
 121
 122         outrows = self.get_tx_outputs(txid, False)
 123         for row in outrows:
 124             _hash = store.binout(row[6])
 125             address = hash_to_address(chr(0), _hash)
 126             if self.tx_cache.has_key(address):
 127                 print "cache: invalidating", address
 128                 self.tx_cache.pop(address)
 129             address_queue.put(address)
 130
 131     def safe_sql(self,sql, params=(), lock=True):
 132         try:
 133             if lock: dblock.acquire()
 134             ret = self.selectall(sql,params)
 135             if lock: dblock.release()
 136             return ret
 137         except:
 138             print "sql error", sql
 139             return []
 140
 141     def get_tx_outputs(self, tx_id, lock=True):
 142         return self.safe_sql("""SELECT
 143                 txout.txout_pos,
 144                 txout.txout_scriptPubKey,
 145                 txout.txout_value,
 146                 nexttx.tx_hash,
 147                 nexttx.tx_id,
 148                 txin.txin_pos,
 149                 pubkey.pubkey_hash
 150               FROM txout
 151               LEFT JOIN txin ON (txin.txout_id = txout.txout_id)
 152               LEFT JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
 153               LEFT JOIN tx nexttx ON (txin.tx_id = nexttx.tx_id)
 154              WHERE txout.tx_id = %d
 155              ORDER BY txout.txout_pos
 156         """%(tx_id), (), lock)
 157
 158     def get_tx_inputs(self, tx_id, lock=True):
 159         return self.safe_sql(""" SELECT
 160                 txin.txin_pos,
 161                 txin.txin_scriptSig,
 162                 txout.txout_value,
 163                 COALESCE(prevtx.tx_hash, u.txout_tx_hash),
 164                 prevtx.tx_id,
 165                 COALESCE(txout.txout_pos, u.txout_pos),
 166                 pubkey.pubkey_hash
 167               FROM txin
 168               LEFT JOIN txout ON (txout.txout_id = txin.txout_id)
 169               LEFT JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
 170               LEFT JOIN tx prevtx ON (txout.tx_id = prevtx.tx_id)
 171               LEFT JOIN unlinked_txin u ON (u.txin_id = txin.txin_id)
 172              WHERE txin.tx_id = %d
 173              ORDER BY txin.txin_pos
 174              """%(tx_id,), (), lock)
 175
 176     def get_address_out_rows(self, dbhash):
 177         return self.safe_sql(""" SELECT
 178                 b.block_nTime,
 179                 cc.chain_id,
 180                 b.block_height,
 181                 1,
 182                 b.block_hash,
 183                 tx.tx_hash,
 184                 tx.tx_id,
 185                 txin.txin_pos,
 186                 -prevout.txout_value
 187               FROM chain_candidate cc
 188               JOIN block b ON (b.block_id = cc.block_id)
 189               JOIN block_tx ON (block_tx.block_id = b.block_id)
 190               JOIN tx ON (tx.tx_id = block_tx.tx_id)
 191               JOIN txin ON (txin.tx_id = tx.tx_id)
 192               JOIN txout prevout ON (txin.txout_id = prevout.txout_id)
 193               JOIN pubkey ON (pubkey.pubkey_id = prevout.pubkey_id)
 194              WHERE pubkey.pubkey_hash = ?
 195                AND cc.in_longest = 1""", (dbhash,))
 196
 197     def get_address_out_rows_memorypool(self, dbhash):
 198         return self.safe_sql(""" SELECT
 199                 1,
 200                 tx.tx_hash,
 201                 tx.tx_id,
 202                 txin.txin_pos,
 203                 -prevout.txout_value
 204               FROM tx
 205               JOIN txin ON (txin.tx_id = tx.tx_id)
 206               JOIN txout prevout ON (txin.txout_id = prevout.txout_id)
 207               JOIN pubkey ON (pubkey.pubkey_id = prevout.pubkey_id)
 208              WHERE pubkey.pubkey_hash = ? """, (dbhash,))
 209
 210     def get_address_in_rows(self, dbhash):
 211         return self.safe_sql(""" SELECT
 212                 b.block_nTime,
 213                 cc.chain_id,
 214                 b.block_height,
 215                 0,
 216                 b.block_hash,
 217                 tx.tx_hash,
 218                 tx.tx_id,
 219                 txout.txout_pos,
 220                 txout.txout_value
 221               FROM chain_candidate cc
 222               JOIN block b ON (b.block_id = cc.block_id)
 223               JOIN block_tx ON (block_tx.block_id = b.block_id)
 224               JOIN tx ON (tx.tx_id = block_tx.tx_id)
 225               JOIN txout ON (txout.tx_id = tx.tx_id)
 226               JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
 227              WHERE pubkey.pubkey_hash = ?
 228                AND cc.in_longest = 1""", (dbhash,))
 229
 230     def get_address_in_rows_memorypool(self, dbhash):
 231         return self.safe_sql( """ SELECT
 232                 0,
 233                 tx.tx_hash,
 234                 tx.tx_id,
 235                 txout.txout_pos,
 236                 txout.txout_value
 237               FROM tx
 238               JOIN txout ON (txout.tx_id = tx.tx_id)
 239               JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
 240              WHERE pubkey.pubkey_hash = ? """, (dbhash,))
 241
 242     def get_history(self, addr):
 243
 244         cached_version = self.tx_cache.get( addr )
 245         if cached_version is not None:
 246             return cached_version
 247
 248         version, binaddr = decode_check_address(addr)
 249         if binaddr is None:
 250             return None
 251
 252         dbhash = self.binin(binaddr)
 253         rows = []
 254         rows += self.get_address_out_rows( dbhash )
 255         rows += self.get_address_in_rows( dbhash )
 256
 257         txpoints = []
 258         known_tx = []
 259
 260         for row in rows:
 261             try:
 262                 nTime, chain_id, height, is_in, blk_hash, tx_hash, tx_id, pos, value = row
 263             except:
 264                 print "cannot unpack row", row
 265                 break
 266             tx_hash = self.hashout_hex(tx_hash)
 267             txpoint = {
 268                     "nTime":    int(nTime),
 269                     "height":   int(height),
 270                     "is_in":    int(is_in),
 271                     "blk_hash": self.hashout_hex(blk_hash),
 272                     "tx_hash":  tx_hash,
 273                     "tx_id":    int(tx_id),
 274                     "pos":      int(pos),
 275                     "value":    int(value),
 276                     }
 277
 278             txpoints.append(txpoint)
 279             known_tx.append(self.hashout_hex(tx_hash))
 280
 281
 282         # todo: sort them really...
 283         txpoints = sorted(txpoints, key=operator.itemgetter("nTime"))
 284
 285         # read memory pool
 286         rows = []
 287         rows += self.get_address_in_rows_memorypool( dbhash )
 288         rows += self.get_address_out_rows_memorypool( dbhash )
 289         address_has_mempool = False
 290
 291         for row in rows:
 292             is_in, tx_hash, tx_id, pos, value = row
 293             tx_hash = self.hashout_hex(tx_hash)
 294             if tx_hash in known_tx:
 295                 continue
 296
 297             # this means that pending transactions were added to the db, even if they are not returned by getmemorypool
 298             address_has_mempool = True
 299
 300             # this means pending transactions are returned by getmemorypool
 301             if tx_hash not in self.mempool_keys:
 302                 continue
 303
 304             #print "mempool", tx_hash
 305             txpoint = {
 306                     "nTime":    0,
 307                     "height":   0,
 308                     "is_in":    int(is_in),
 309                     "blk_hash": 'mempool',
 310                     "tx_hash":  tx_hash,
 311                     "tx_id":    int(tx_id),
 312                     "pos":      int(pos),
 313                     "value":    int(value),
 314                     }
 315             txpoints.append(txpoint)
 316
 317
 318         for txpoint in txpoints:
 319             tx_id = txpoint['tx_id']
 320
 321             txinputs = []
 322             inrows = self.get_tx_inputs(tx_id)
 323             for row in inrows:
 324                 _hash = self.binout(row[6])
 325                 address = hash_to_address(chr(0), _hash)
 326                 txinputs.append(address)
 327             txpoint['inputs'] = txinputs
 328             txoutputs = []
 329             outrows = self.get_tx_outputs(tx_id)
 330             for row in outrows:
 331                 _hash = self.binout(row[6])
 332                 address = hash_to_address(chr(0), _hash)
 333                 txoutputs.append(address)
 334             txpoint['outputs'] = txoutputs
 335
 336             # for all unspent inputs, I want their scriptpubkey. (actually I could deduce it from the address)
 337             if not txpoint['is_in']:
 338                 # detect if already redeemed...
 339                 for row in outrows:
 340                     if row[6] == dbhash: break
 341                 else:
 342                     raise
 343                 #row = self.get_tx_output(tx_id,dbhash)
 344                 # pos, script, value, o_hash, o_id, o_pos, binaddr = row
 345                 # if not redeemed, we add the script
 346                 if row:
 347                     if not row[4]: txpoint['raw_scriptPubKey'] = row[1]
 348
 349         # cache result
 350         if not address_has_mempool:
 351             self.tx_cache[addr] = txpoints
 352
 353         return txpoints
 354
 355
 356
 357 class Direct_Interface(Interface):
 358     def __init__(self):
 359         pass
 360
 361     def handler(self, method, params = ''):
 362         cmds = {'session.new':new_session,
 363                 'session.poll':poll_session,
 364                 'session.update':update_session,
 365                 'transaction.broadcast':send_tx,
 366                 'address.get_history':store.get_history
 367                 }
 368         func = cmds[method]
 369         return func( params )
 370
 371
 372
 373 def send_tx(tx):
 374     postdata = dumps({"method": 'importtransaction', 'params': [tx], 'id':'jsonrpc'})
 375     respdata = urllib.urlopen(bitcoind_url, postdata).read()
 376     r = loads(respdata)
 377     if r['error'] != None:
 378         out = "error: transaction rejected by memorypool\n"+tx
 379     else:
 380         out = r['result']
 381     return out
 382
 383
 384
 385 def random_string(N):
 386     import random, string
 387     return ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(N))
 388
 389
 390
 391 def cmd_stop(_,__,pw):
 392     global stopping
 393     if password == pw:
 394         stopping = True
 395         return 'ok'
 396     else:
 397         return 'wrong password'
 398
 399 def cmd_load(_,__,pw):
 400     if password == pw:
 401         return repr( len(sessions) )
 402     else:
 403         return 'wrong password'
 404
 405
 406 def clear_cache(_,__,pw):
 407     if password == pw:
 408         store.tx_cache = {}
 409         return 'ok'
 410     else:
 411         return 'wrong password'
 412
 413 def get_cache(_,__,pw,addr):
 414     if password == pw:
 415         return store.tx_cache.get(addr)
 416     else:
 417         return 'wrong password'
 418
 419
 420
 421
 422 def modified_addresses(session):
 423     if 1:
 424         t1 = time.time()
 425         addresses = session['addresses']
 426         session['last_time'] = time.time()
 427         ret = {}
 428         k = 0
 429         for addr in addresses:
 430             if store.tx_cache.get( addr ) is not None: k += 1
 431             status = get_address_status( addr )
 432             msg_id, last_status = addresses.get( addr )
 433             if last_status != status:
 434                 addresses[addr] = msg_id, status
 435                 ret[addr] = status
 436
 437         t2 = time.time() - t1
 438         #if t2 > 10: print "high load:", session_id, "%d/%d"%(k,len(addresses)), t2
 439         return ret, addresses
 440
 441
 442 def poll_session(session_id):
 443     # native
 444     session = sessions.get(session_id)
 445     if session is None:
 446         print time.asctime(), "session not found", session_id
 447         return -1, {}
 448     else:
 449         ret, addresses = modified_addresses(session)
 450         if ret: sessions[session_id]['addresses'] = addresses
 451         return repr( (block_number,ret))
 452
 453
 454 def poll_session_json(session_id, message_id):
 455     session = m_sessions[0].get(session_id)
 456     if session is None:
 457         raise BaseException("session not found %s"%session_id)
 458     else:
 459         out = []
 460         ret, addresses = modified_addresses(session)
 461         if ret:
 462             m_sessions[0][session_id]['addresses'] = addresses
 463             for addr in ret:
 464                 msg_id, status = addresses[addr]
 465                 out.append(  { 'id':msg_id, 'result':status } )
 466
 467         msg_id, last_nb = session.get('numblocks')
 468         if last_nb:
 469             if last_nb != block_number:
 470                 m_sessions[0][session_id]['numblocks'] = msg_id, block_number
 471                 out.append( {'id':msg_id, 'result':block_number} )
 472
 473         return out
 474
 475
 476 def do_update_address(addr):
 477     # an address was involved in a transaction; we check if it was subscribed to in a session
 478     # the address can be subscribed in several sessions; the cache should ensure that we don't do redundant requests
 479
 480     for session_id in sessions.keys():
 481         session = sessions[session_id]
 482         if session.get('type') != 'persistent': continue
 483         addresses = session['addresses'].keys()
 484
 485         if addr in addresses:
 486             status = get_address_status( addr )
 487             message_id, last_status = session['addresses'][addr]
 488             if last_status != status:
 489                 #print "sending new status for %s:"%addr, status
 490                 send_status(session_id,message_id,addr,status)
 491                 sessions[session_id]['addresses'][addr] = (message_id,status)
 492
 493 def get_address_status(addr):
 494     # get address status, i.e. the last block for that address.
 495     tx_points = store.get_history(addr)
 496     if not tx_points:
 497         status = None
 498     else:
 499         lastpoint = tx_points[-1]
 500         status = lastpoint['blk_hash']
 501         # this is a temporary hack; move it up once old clients have disappeared
 502         if status == 'mempool': # and session['version'] != "old":
 503             status = status + ':%d'% len(tx_points)
 504     return status
 505
 506
 507 def send_numblocks(session_id):
 508     message_id = sessions_sub_numblocks[session_id]
 509     out = json.dumps( {'id':message_id, 'result':block_number} )
 510     output_queue.put((session_id, out))
 511
 512 def send_status(session_id, message_id, address, status):
 513     out = json.dumps( { 'id':message_id, 'result':status } )
 514     output_queue.put((session_id, out))
 515
 516 def address_get_history_json(_,message_id,address):
 517     return store.get_history(address)
 518
 519 def subscribe_to_numblocks(session_id, message_id):
 520     sessions_sub_numblocks[session_id] = message_id
 521     send_numblocks(session_id)
 522
 523 def subscribe_to_numblocks_json(session_id, message_id):
 524     global m_sessions
 525     m_sessions[0][session_id]['numblocks'] = message_id,block_number
 526     return block_number
 527
 528 def subscribe_to_address(session_id, message_id, address):
 529     status = get_address_status(address)
 530     sessions[session_id]['addresses'][address] = (message_id, status)
 531     sessions[session_id]['last_time'] = time.time()
 532     send_status(session_id, message_id, address, status)
 533
 534 def add_address_to_session_json(session_id, message_id, address):
 535     global m_sessions
 536     sessions = m_sessions[0]
 537     status = get_address_status(address)
 538     sessions[session_id]['addresses'][address] = (message_id, status)
 539     sessions[session_id]['last_time'] = time.time()
 540     m_sessions[0] = sessions
 541     return status
 542
 543 def add_address_to_session(session_id, address):
 544     status = get_address_status(address)
 545     sessions[session_id]['addresses'][addr] = ("", status)
 546     sessions[session_id]['last_time'] = time.time()
 547     return status
 548
 549 def new_session(version, addresses):
 550     session_id = random_string(10)
 551     sessions[session_id] = { 'addresses':{}, 'version':version }
 552     for a in addresses:
 553         sessions[session_id]['addresses'][a] = ('','')
 554     out = repr( (session_id, config.get('server','banner').replace('\\n','\n') ) )
 555     sessions[session_id]['last_time'] = time.time()
 556     return out
 557
 558
 559 def client_version_json(session_id, _, version):
 560     global m_sessions
 561     sessions = m_sessions[0]
 562     sessions[session_id]['version'] = version
 563     m_sessions[0] = sessions
 564
 565 def create_session_json(_, __):
 566     sessions = m_sessions[0]
 567     session_id = random_string(10)
 568     print "creating session", session_id
 569     sessions[session_id] = { 'addresses':{}, 'numblocks':('','') }
 570     sessions[session_id]['last_time'] = time.time()
 571     m_sessions[0] = sessions
 572     return session_id
 573
 574
 575
 576 def get_banner(_,__):
 577     return config.get('server','banner').replace('\\n','\n')
 578
 579 def update_session(session_id,addresses):
 580     """deprecated in 0.42"""
 581     sessions[session_id]['addresses'] = {}
 582     for a in addresses:
 583         sessions[session_id]['addresses'][a] = ''
 584     sessions[session_id]['last_time'] = time.time()
 585     return 'ok'
 586
 587 def native_server_thread():
 588     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 589     s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 590     s.bind((config.get('server','host'), config.getint('server','port')))
 591     s.listen(1)
 592     while not stopping:
 593         conn, addr = s.accept()
 594         try:
 595             thread.start_new_thread(native_client_thread, (addr, conn,))
 596         except:
 597             # can't start new thread if there is no memory..
 598             traceback.print_exc(file=sys.stdout)
 599
 600
 601 def native_client_thread(ipaddr,conn):
 602     #print "client thread", ipaddr
 603     try:
 604         ipaddr = ipaddr[0]
 605         msg = ''
 606         while 1:
 607             d = conn.recv(1024)
 608             msg += d
 609             if not d:
 610                 break
 611             if '#' in msg:
 612                 msg = msg.split('#', 1)[0]
 613                 break
 614         try:
 615             cmd, data = ast.literal_eval(msg)
 616         except:
 617             print "syntax error", repr(msg), ipaddr
 618             conn.close()
 619             return
 620
 621         out = do_command(cmd, data, ipaddr)
 622         if out:
 623             #print ipaddr, cmd, len(out)
 624             try:
 625                 conn.send(out)
 626             except:
 627                 print "error, could not send"
 628
 629     finally:
 630         conn.close()
 631
 632
 633 def timestr():
 634     return time.strftime("[%d/%m/%Y-%H:%M:%S]")
 635
 636 # used by the native handler
 637 def do_command(cmd, data, ipaddr):
 638
 639     if cmd=='b':
 640         out = "%d"%block_number
 641
 642     elif cmd in ['session','new_session']:
 643         try:
 644             if cmd == 'session':
 645                 addresses = ast.literal_eval(data)
 646                 version = "old"
 647             else:
 648                 version, addresses = ast.literal_eval(data)
 649                 if version[0]=="0": version = "v" + version
 650         except:
 651             print "error", data
 652             return None
 653         print timestr(), "new session", ipaddr, addresses[0] if addresses else addresses, len(addresses), version
 654         out = new_session(version, addresses)
 655
 656     elif cmd=='address.subscribe':
 657         try:
 658             session_id, addr = ast.literal_eval(data)
 659         except:
 660             print "error"
 661             return None
 662         out = add_address_to_session(session_id,addr)
 663
 664     elif cmd=='update_session':
 665         try:
 666             session_id, addresses = ast.literal_eval(data)
 667         except:
 668             print "error"
 669             return None
 670         print timestr(), "update session", ipaddr, addresses[0] if addresses else addresses, len(addresses)
 671         out = update_session(session_id,addresses)
 672
 673     elif cmd == 'bccapi_login':
 674         import electrum
 675         print "data",data
 676         v, k = ast.literal_eval(data)
 677         master_public_key = k.decode('hex') # todo: sanitize. no need to decode twice...
 678         print master_public_key
 679         wallet_id = random_string(10)
 680         w = Wallet( Direct_Interface() )
 681         w.master_public_key = master_public_key.decode('hex')
 682         w.synchronize()
 683         wallets[wallet_id] = w
 684         out = wallet_id
 685         print "wallets", wallets
 686
 687     elif cmd == 'bccapi_getAccountInfo':
 688         from wallet import int_to_hex
 689         v, wallet_id = ast.literal_eval(data)
 690         w = wallets.get(wallet_id)
 691         if w is not None:
 692             num = len(w.addresses)
 693             c, u = w.get_balance()
 694             out = int_to_hex(num,4) + int_to_hex(c,8) + int_to_hex( c+u, 8 )
 695             out = out.decode('hex')
 696         else:
 697             print "error",data
 698             out = "error"
 699
 700     elif cmd == 'bccapi_getAccountStatement':
 701         from wallet import int_to_hex
 702         v, wallet_id = ast.literal_eval(data)
 703         w = wallets.get(wallet_id)
 704         if w is not None:
 705             num = len(w.addresses)
 706             c, u = w.get_balance()
 707             total_records = num_records = 0
 708             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 )
 709             out = out.decode('hex')
 710         else:
 711             print "error",data
 712             out = "error"
 713
 714     elif cmd == 'bccapi_getSendCoinForm':
 715         out = ''
 716
 717     elif cmd == 'bccapi_submitTransaction':
 718         out = ''
 719
 720     elif cmd=='poll':
 721         out = poll_session(data)
 722
 723     elif cmd == 'h':
 724         # history
 725         address = data
 726         out = repr( store.get_history( address ) )
 727
 728     elif cmd == 'load':
 729         out = cmd_load(data)
 730
 731     elif cmd =='tx':
 732         out = send_tx(data)
 733         print timestr(), "sent tx:", ipaddr, out
 734
 735     elif cmd == 'stop':
 736         out = cmd_stop(data)
 737
 738     elif cmd == 'peers':
 739         out = repr(peer_list.values())
 740
 741     else:
 742         out = None
 743
 744     return out
 745
 746
 747
 748 ####################################################################
 749
 750 def tcp_server_thread():
 751     thread.start_new_thread(process_input_queue, ())
 752     thread.start_new_thread(process_output_queue, ())
 753
 754     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 755     s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 756     s.bind((config.get('server','host'), 50001))
 757     s.listen(1)
 758     while not stopping:
 759         conn, addr = s.accept()
 760         try:
 761             thread.start_new_thread(tcp_client_thread, (addr, conn,))
 762         except:
 763             # can't start new thread if there is no memory..
 764             traceback.print_exc(file=sys.stdout)
 765
 766
 767 def close_session(session_id):
 768     #print "lost connection", session_id
 769     sessions.pop(session_id)
 770     if session_id in sessions_sub_numblocks:
 771         sessions_sub_numblocks.pop(session_id)
 772
 773
 774 # one thread per client. put requests in a queue.
 775 def tcp_client_thread(ipaddr,conn):
 776     """ use a persistent connection. put commands in a queue."""
 777
 778     print timestr(), "TCP session", ipaddr
 779     global sessions
 780
 781     session_id = random_string(10)
 782     sessions[session_id] = { 'conn':conn, 'addresses':{}, 'version':'unknown', 'type':'persistent' }
 783
 784     ipaddr = ipaddr[0]
 785     msg = ''
 786
 787     while not stopping:
 788         try:
 789             d = conn.recv(1024)
 790         except socket.error:
 791             d = ''
 792         if not d:
 793             close_session(session_id)
 794             break
 795
 796         msg += d
 797         while True:
 798             s = msg.find('\n')
 799             if s ==-1:
 800                 break
 801             else:
 802                 c = msg[0:s].strip()
 803                 msg = msg[s+1:]
 804                 if c == 'quit':
 805                     conn.close()
 806                     close_session(session_id)
 807                     return
 808                 try:
 809                     c = json.loads(c)
 810                 except:
 811                     print "json error", repr(c)
 812                     continue
 813                 try:
 814                     message_id = c.get('id')
 815                     method = c.get('method')
 816                     params = c.get('params')
 817                 except:
 818                     print "syntax error", repr(c), ipaddr
 819                     continue
 820
 821                 # add to queue
 822                 input_queue.put((session_id, message_id, method, params))
 823
 824
 825
 826 # read commands from the input queue. perform requests, etc. this should be called from the main thread.
 827 def process_input_queue():
 828     while not stopping:
 829         session_id, message_id, method, data = input_queue.get()
 830         if session_id not in sessions.keys():
 831             continue
 832         out = None
 833         if method == 'address.subscribe':
 834             address = data[0]
 835             subscribe_to_address(session_id,message_id,address)
 836         elif method == 'numblocks.subscribe':
 837             subscribe_to_numblocks(session_id,message_id)
 838         elif method == 'client.version':
 839             sessions[session_id]['version'] = data[0]
 840         elif method == 'server.banner':
 841             out = { 'result':config.get('server','banner').replace('\\n','\n') }
 842         elif method == 'server.peers':
 843             out = { 'result':peer_list.values() }
 844         elif method == 'address.get_history':
 845             address = data[0]
 846             out = { 'result':store.get_history( address ) }
 847         elif method == 'transaction.broadcast':
 848             postdata = dumps({"method": 'importtransaction', 'params': [data], 'id':'jsonrpc'})
 849             txo = urllib.urlopen(bitcoind_url, postdata).read()
 850             print "sent tx:", txo
 851             out = json.loads(txo)
 852         else:
 853             print "unknown command", method
 854         if out:
 855             out['id'] = message_id
 856             out = json.dumps( out )
 857             output_queue.put((session_id, out))
 858
 859 # this is a separate thread
 860 def process_output_queue():
 861     while not stopping:
 862         session_id, out = output_queue.get()
 863         session = sessions.get(session_id)
 864         if session:
 865             try:
 866                 conn = session.get('conn')
 867                 conn.send(out+'\n')
 868             except:
 869                 close_session(session_id)
 870
 871
 872
 873
 874 ####################################################################
 875
 876
 877 def memorypool_update(store):
 878
 879     ds = BCDataStream.BCDataStream()
 880     previous_transactions = store.mempool_keys
 881     store.mempool_keys = []
 882
 883     postdata = dumps({"method": 'getmemorypool', 'params': [], 'id':'jsonrpc'})
 884     respdata = urllib.urlopen(bitcoind_url, postdata).read()
 885     r = loads(respdata)
 886     if r['error'] != None:
 887         return
 888
 889     v = r['result'].get('transactions')
 890     for hextx in v:
 891         ds.clear()
 892         ds.write(hextx.decode('hex'))
 893         tx = deserialize.parse_Transaction(ds)
 894         tx['hash'] = util.double_sha256(tx['tx'])
 895         tx_hash = store.hashin(tx['hash'])
 896
 897         store.mempool_keys.append(tx_hash)
 898         if store.tx_find_id_and_value(tx):
 899             pass
 900         else:
 901             tx_id = store.import_tx(tx, False)
 902             store.update_tx_cache(tx_id)
 903
 904     store.commit()
 905
 906
 907 def clean_session_thread():
 908     while not stopping:
 909         time.sleep(30)
 910         t = time.time()
 911         for k,s in sessions.items():
 912             if s.get('type') == 'persistent': continue
 913             t0 = s['last_time']
 914             if t - t0 > 5*60:
 915                 sessions.pop(k)
 916                 print "lost session", k
 917
 918
 919 def irc_thread():
 920     global peer_list
 921     NICK = 'E_'+random_string(10)
 922     while not stopping:
 923         try:
 924             s = socket.socket()
 925             s.connect(('irc.freenode.net', 6667))
 926             s.send('USER electrum 0 * :'+config.get('server','host')+' '+config.get('server','ircname')+'\n')
 927             s.send('NICK '+NICK+'\n')
 928             s.send('JOIN #electrum\n')
 929             sf = s.makefile('r', 0)
 930             t = 0
 931             while not stopping:
 932                 line = sf.readline()
 933                 line = line.rstrip('\r\n')
 934                 line = line.split()
 935                 if line[0]=='PING':
 936                     s.send('PONG '+line[1]+'\n')
 937                 elif '353' in line: # answer to /names
 938                     k = line.index('353')
 939                     for item in line[k+1:]:
 940                         if item[0:2] == 'E_':
 941                             s.send('WHO %s\n'%item)
 942                 elif '352' in line: # answer to /who
 943                     # warning: this is a horrible hack which apparently works
 944                     k = line.index('352')
 945                     ip = line[k+4]
 946                     ip = socket.gethostbyname(ip)
 947                     name = line[k+6]
 948                     host = line[k+9]
 949                     peer_list[name] = (ip,host)
 950                 if time.time() - t > 5*60:
 951                     s.send('NAMES #electrum\n')
 952                     t = time.time()
 953                     peer_list = {}
 954         except:
 955             traceback.print_exc(file=sys.stdout)
 956         finally:
 957             sf.close()
 958             s.close()
 959
 960
 961 def get_peers_json(_,__):
 962     return peer_list.values()
 963
 964 def http_server_thread(store):
 965     # see http://code.google.com/p/jsonrpclib/
 966     from SocketServer import ThreadingMixIn
 967     from StratumJSONRPCServer import StratumJSONRPCServer
 968     class StratumThreadedJSONRPCServer(ThreadingMixIn, StratumJSONRPCServer): pass
 969     server = StratumThreadedJSONRPCServer(( config.get('server','host'), 8081))
 970     server.register_function(get_peers_json, 'server.peers')
 971     server.register_function(cmd_stop, 'stop')
 972     server.register_function(cmd_load, 'load')
 973     server.register_function(clear_cache, 'clear_cache')
 974     server.register_function(get_cache, 'get_cache')
 975     server.register_function(get_banner, 'server.banner')
 976     server.register_function(lambda a,b,c: send_tx(c), 'transaction.broadcast')
 977     server.register_function(address_get_history_json, 'address.get_history')
 978     server.register_function(add_address_to_session_json, 'address.subscribe')
 979     server.register_function(subscribe_to_numblocks_json, 'numblocks.subscribe')
 980     server.register_function(client_version_json, 'client.version')
 981     server.register_function(create_session_json, 'session.create')   # internal message (not part of protocol)
 982     server.register_function(poll_session_json, 'session.poll')       # internal message (not part of protocol)
 983     server.serve_forever()
 984
 985
 986 import traceback
 987
 988
 989 if __name__ == '__main__':
 990
 991     if len(sys.argv)>1:
 992         import jsonrpclib
 993         server = jsonrpclib.Server('http://%s:8081'%config.get('server','host'))
 994         cmd = sys.argv[1]
 995         if cmd == 'load':
 996             out = server.load(password)
 997         elif cmd == 'peers':
 998             out = server.server.peers()
 999         elif cmd == 'stop':
1000             out = server.stop(password)
1001         elif cmd == 'clear_cache':
1002             out = server.clear_cache(password)
1003         elif cmd == 'get_cache':
1004             out = server.get_cache(password,sys.argv[2])
1005         elif cmd == 'h':
1006             out = server.address.get_history(sys.argv[2])
1007         elif cmd == 'tx':
1008             out = server.transaction.broadcast(sys.argv[2])
1009         elif cmd == 'b':
1010             out = server.numblocks.subscribe()
1011         else:
1012             out = "Unknown command: '%s'" % cmd
1013         print out
1014         sys.exit(0)
1015
1016
1017     print "starting Electrum server"
1018
1019     conf = DataStore.CONFIG_DEFAULTS
1020     args, argv = readconf.parse_argv( [], conf)
1021     args.dbtype= config.get('database','type')
1022     if args.dbtype == 'sqlite3':
1023         args.connect_args = { 'database' : config.get('database','database') }
1024     elif args.dbtype == 'MySQLdb':
1025         args.connect_args = { 'db' : config.get('database','database'), 'user' : config.get('database','username'), 'passwd' : config.get('database','password') }
1026     elif args.dbtype == 'psycopg2':
1027         args.connect_args = { 'database' : config.get('database','database') }
1028     store = MyStore(args)
1029     store.tx_cache = {}
1030     store.mempool_keys = {}
1031
1032     # supported protocols
1033     thread.start_new_thread(native_server_thread, ())
1034     thread.start_new_thread(tcp_server_thread, ())
1035     thread.start_new_thread(http_server_thread, (store,))
1036
1037     thread.start_new_thread(clean_session_thread, ())
1038
1039     if (config.get('server','irc') == 'yes' ):
1040         thread.start_new_thread(irc_thread, ())
1041
1042     while not stopping:
1043         try:
1044             dblock.acquire()
1045             store.catch_up()
1046             memorypool_update(store)
1047
1048             block_number = store.get_block_number(1)
1049             if block_number != old_block_number:
1050                 old_block_number = block_number
1051                 for session_id in sessions_sub_numblocks.keys():
1052                     send_numblocks(session_id)
1053
1054         except IOError:
1055             print "IOError: cannot reach bitcoind"
1056             block_number = 0
1057         except:
1058             traceback.print_exc(file=sys.stdout)
1059             block_number = 0
1060         finally:
1061             dblock.release()
1062
1063         # do addresses
1064         while True:
1065             try:
1066                 addr = address_queue.get(False)
1067             except:
1068                 break
1069             do_update_address(addr)
1070
1071         time.sleep(10)
1072
1073     print "server stopped"
1074