lib/wallet.py

   1 #!/usr/bin/env python
   2 #
   3 # Electrum - lightweight Bitcoin client
   4 # Copyright (C) 2011 thomasv@gitorious
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
  18
  19 import sys
  20 import base64
  21 import os
  22 import re
  23 import hashlib
  24 import copy
  25 import operator
  26 import ast
  27 import threading
  28 import random
  29 import aes
  30 import Queue
  31 import time
  32
  33 from util import print_msg, print_error, user_dir, format_satoshis
  34 from bitcoin import *
  35
  36
  37 # AES encryption
  38 EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
  39 DecodeAES = lambda secret, e: aes.decryptData(secret, base64.b64decode(e))
  40
  41 def pw_encode(s, password):
  42     if password:
  43         secret = Hash(password)
  44         return EncodeAES(secret, s)
  45     else:
  46         return s
  47
  48 def pw_decode(s, password):
  49     if password is not None:
  50         secret = Hash(password)
  51         try:
  52             d = DecodeAES(secret, s)
  53         except:
  54             raise BaseException('Invalid password')
  55         return d
  56     else:
  57         return s
  58
  59
  60
  61
  62
  63 from version import ELECTRUM_VERSION, SEED_VERSION
  64
  65
  66 class Wallet:
  67     def __init__(self, config={}):
  68
  69         self.config = config
  70         self.electrum_version = ELECTRUM_VERSION
  71         self.gap_limit_for_change = 3 # constant
  72
  73         # saved fields
  74         self.seed_version          = config.get('seed_version', SEED_VERSION)
  75         self.gap_limit             = config.get('gap_limit', 5)
  76         self.use_change            = config.get('use_change',True)
  77         self.fee                   = int(config.get('fee_per_kb',10000))
  78         self.num_zeros             = int(config.get('num_zeros',0))
  79         self.use_encryption        = config.get('use_encryption', False)
  80         self.seed                  = config.get('seed', '')               # encrypted
  81         self.labels                = config.get('labels', {})
  82         self.frozen_addresses      = config.get('frozen_addresses',[])
  83         self.prioritized_addresses = config.get('prioritized_addresses',[])
  84         self.addressbook           = config.get('contacts', [])
  85         self.imported_keys         = config.get('imported_keys',{})
  86         self.history               = config.get('addr_history',{})        # address -> list(txid, height)
  87         self.accounts              = config.get('accounts', {})   # this should not include public keys
  88
  89         self.SequenceClass = ElectrumSequence
  90         self.sequences = {}
  91         self.sequences[0] = self.SequenceClass(self.config.get('master_public_key'))
  92
  93         if self.accounts.get(0) is None:
  94             self.accounts[0] = { 0:[], 1:[], 'name':'Main account' }
  95
  96         self.transactions = {}
  97         tx = config.get('transactions',{})
  98         try:
  99             for k,v in tx.items(): self.transactions[k] = Transaction(v)
 100         except:
 101             print_msg("Warning: Cannot deserialize transactions. skipping")
 102
 103         # not saved
 104         self.prevout_values = {}     # my own transaction outputs
 105         self.spent_outputs = []
 106
 107         # spv
 108         self.verifier = None
 109
 110         # there is a difference between wallet.up_to_date and interface.is_up_to_date()
 111         # interface.is_up_to_date() returns true when all requests have been answered and processed
 112         # wallet.up_to_date is true when the wallet is synchronized (stronger requirement)
 113
 114         self.up_to_date = False
 115         self.lock = threading.Lock()
 116         self.transaction_lock = threading.Lock()
 117         self.tx_event = threading.Event()
 118
 119         if self.seed_version != SEED_VERSION:
 120             raise ValueError("This wallet seed is deprecated. Please run upgrade.py for a diagnostic.")
 121
 122         for tx_hash in self.transactions.keys():
 123             self.update_tx_outputs(tx_hash)
 124
 125
 126     def set_up_to_date(self,b):
 127         with self.lock: self.up_to_date = b
 128
 129     def is_up_to_date(self):
 130         with self.lock: return self.up_to_date
 131
 132     def update(self):
 133         self.up_to_date = False
 134         self.interface.poke('synchronizer')
 135         while not self.is_up_to_date(): time.sleep(0.1)
 136
 137     def import_key(self, sec, password):
 138         # check password
 139         seed = self.decode_seed(password)
 140         address = address_from_private_key(sec)
 141
 142         if self.is_mine(address):
 143             raise BaseException('Address already in wallet')
 144
 145         # store the originally requested keypair into the imported keys table
 146         self.imported_keys[address] = pw_encode(sec, password )
 147         return address
 148
 149
 150     def init_seed(self, seed):
 151         if self.seed: raise BaseException("a seed exists")
 152         if not seed:
 153             seed = random_seed(128)
 154         self.seed = seed
 155         self.config.set_key('seed', self.seed, True)
 156         self.config.set_key('seed_version', self.seed_version, True)
 157         mpk = self.SequenceClass.mpk_from_seed(self.seed)
 158         self.init_sequence(mpk)
 159
 160
 161     def init_sequence(self, mpk):
 162         self.config.set_key('master_public_key', mpk, True)
 163         self.sequences[0] = self.SequenceClass(mpk)
 164         self.accounts[0] = { 0:[], 1:[], 'name':'Main account' }
 165         self.config.set_key('accounts', self.accounts, True)
 166
 167
 168     def addresses(self, include_change = False):
 169         o = self.imported_keys.keys()
 170         for a in self.accounts.values():
 171             o += a[0]
 172             if include_change: o += a[1]
 173         return o
 174
 175
 176     def is_mine(self, address):
 177         return address in self.addresses(True)
 178
 179     def is_change(self, address):
 180         if not self.is_mine(address): return False
 181         if address in self.imported_keys.keys(): return False
 182         acct, s = self.get_address_index(address)
 183         return s[0] == 1
 184
 185     def get_master_public_key(self):
 186         return self.config.get("master_public_key")
 187
 188     def get_address_index(self, address):
 189         if address in self.imported_keys.keys():
 190             raise BaseException("imported key")
 191         for account in self.accounts.keys():
 192             for for_change in [0,1]:
 193                 addresses = self.accounts[account][for_change]
 194                 for addr in addresses:
 195                     if address == addr:
 196                         return account, (for_change, addresses.index(addr))
 197         raise BaseException("not found")
 198
 199
 200     def get_public_key(self, address):
 201         account, sequence = self.get_address_index(address)
 202         return self.sequences[account].get_pubkey( sequence )
 203
 204
 205     def decode_seed(self, password):
 206         seed = pw_decode(self.seed, password)
 207         self.sequences[0].check_seed(seed)
 208         return seed
 209
 210     def get_private_key(self, address, password):
 211         return self.get_private_keys([address], password).get(address)
 212
 213     def get_private_keys(self, addresses, password):
 214         if not self.seed: return {}
 215         # decode seed in any case, in order to test the password
 216         seed = self.decode_seed(password)
 217         out = {}
 218         l_sequences = []
 219         l_addresses = []
 220         for address in addresses:
 221             if address in self.imported_keys.keys():
 222                 out[address] = pw_decode( self.imported_keys[address], password )
 223             else:
 224                 account, sequence = self.get_address_index(address)
 225                 if account == 0:
 226                     l_sequences.append(sequence)
 227                     l_addresses.append(address)
 228
 229         pk = self.sequences[0].get_private_keys(l_sequences, seed)
 230         for i, address in enumerate(l_addresses): out[address] = pk[i]
 231         return out
 232
 233
 234     def signrawtransaction(self, tx, input_info, private_keys, password):
 235         unspent_coins = self.get_unspent_coins()
 236         seed = self.decode_seed(password)
 237
 238         # convert private_keys to dict
 239         pk = {}
 240         for sec in private_keys:
 241             address = address_from_private_key(sec)
 242             pk[address] = sec
 243         private_keys = pk
 244
 245         for txin in tx.inputs:
 246             # convert to own format
 247             txin['tx_hash'] = txin['prevout_hash']
 248             txin['index'] = txin['prevout_n']
 249
 250             for item in input_info:
 251                 if item.get('txid') == txin['tx_hash'] and item.get('vout') == txin['index']:
 252                     txin['raw_output_script'] = item['scriptPubKey']
 253                     txin['redeemScript'] = item.get('redeemScript')
 254                     txin['KeyID'] = item.get('KeyID')
 255                     break
 256             else:
 257                 for item in unspent_coins:
 258                     if txin['tx_hash'] == item['tx_hash'] and txin['index'] == item['index']:
 259                         txin['raw_output_script'] = item['raw_output_script']
 260                         break
 261                 else:
 262                     # if neither, we might want to get it from the server..
 263                     raise
 264
 265             # find the address:
 266             if txin.get('KeyID'):
 267                 account, name, sequence = txin.get('KeyID')
 268                 if name != 'Electrum': continue
 269                 sec = self.sequences[account].get_private_key(sequence, seed)
 270                 addr = self.sequences[account].get_address(sequence)
 271                 txin['address'] = addr
 272                 private_keys[addr] = sec
 273
 274             elif txin.get("redeemScript"):
 275                 txin['address'] = hash_160_to_bc_address(hash_160(txin.get("redeemScript").decode('hex')), 5)
 276
 277             elif txin.get("raw_output_script"):
 278                 import deserialize
 279                 addr = deserialize.get_address_from_output_script(txin.get("raw_output_script").decode('hex'))
 280                 sec = self.get_private_key(addr, password)
 281                 if sec:
 282                     private_keys[addr] = sec
 283                     txin['address'] = addr
 284
 285         tx.sign( private_keys )
 286
 287     def sign_message(self, address, message, password):
 288         sec = self.get_private_key(address, password)
 289         key = regenerate_key(sec)
 290         compressed = is_compressed(sec)
 291         return key.sign_message(message, compressed, address)
 292
 293
 294     def create_new_address(self, account, for_change):
 295         addresses = self.accounts[account][for_change]
 296         n = len(addresses)
 297         address = self.get_new_address( account, for_change, n)
 298         self.accounts[account][for_change].append(address)
 299         self.history[address] = []
 300         print_msg(address)
 301         return address
 302
 303
 304     def get_new_address(self, account, for_change, n):
 305         return self.sequences[account].get_address((for_change, n))
 306         print address
 307         return address
 308
 309     def change_gap_limit(self, value):
 310         if value >= self.gap_limit:
 311             self.gap_limit = value
 312             self.save()
 313             self.interface.poke('synchronizer')
 314             return True
 315
 316         elif value >= self.min_acceptable_gap():
 317             for key, account in self.accounts.items():
 318                 addresses = account[0]
 319                 k = self.num_unused_trailing_addresses(addresses)
 320                 n = len(addresses) - k + value
 321                 addresses = addresses[0:n]
 322                 self.accounts[key][0] = addresses
 323
 324             self.gap_limit = value
 325             self.save()
 326             return True
 327         else:
 328             return False
 329
 330     def num_unused_trailing_addresses(self, addresses):
 331         k = 0
 332         for a in addresses[::-1]:
 333             if self.history.get(a):break
 334             k = k + 1
 335         return k
 336
 337     def min_acceptable_gap(self):
 338         # fixme: this assumes wallet is synchronized
 339         n = 0
 340         nmax = 0
 341
 342         for account in self.accounts.values():
 343             addresses = account[0]
 344             k = self.num_unused_trailing_addresses(addresses)
 345             for a in addresses[0:-k]:
 346                 if self.history.get(a):
 347                     n = 0
 348                 else:
 349                     n += 1
 350                     if n > nmax: nmax = n
 351         return nmax + 1
 352
 353
 354     def address_is_old(self, address):
 355         age = -1
 356         h = self.history.get(address, [])
 357         if h == ['*']:
 358             return True
 359         for tx_hash, tx_height in h:
 360             if tx_height == 0:
 361                 tx_age = 0
 362             else:
 363                 tx_age = self.verifier.height - tx_height + 1
 364             if tx_age > age:
 365                 age = tx_age
 366         return age > 2
 367
 368
 369     def synchronize_sequence(self, account, for_change):
 370         limit = self.gap_limit_for_change if for_change else self.gap_limit
 371         addresses = self.accounts[account][for_change]
 372         new_addresses = []
 373         while True:
 374             if len(addresses) < limit:
 375                 new_addresses.append( self.create_new_address(account, for_change) )
 376                 continue
 377             if map( lambda a: self.address_is_old(a), addresses[-limit:] ) == limit*[False]:
 378                 break
 379             else:
 380                 new_addresses.append( self.create_new_address(account, for_change) )
 381         return new_addresses
 382
 383
 384     def synchronize_account(self, account):
 385         new = []
 386         new += self.synchronize_sequence(account, 0)
 387         new += self.synchronize_sequence(account, 1)
 388         return new
 389
 390     def synchronize(self):
 391         new = []
 392         for account in self.accounts.keys():
 393             new += self.synchronize_account(account)
 394         return new
 395
 396
 397     def is_found(self):
 398         return self.history.values() != [[]] * len(self.history)
 399
 400
 401     def fill_addressbook(self):
 402         for tx_hash, tx in self.transactions.items():
 403             is_send, _, _ = self.get_tx_value(tx)
 404             if is_send:
 405                 for addr, v in tx.outputs:
 406                     if not self.is_mine(addr) and addr not in self.addressbook:
 407                         self.addressbook.append(addr)
 408         # redo labels
 409         # self.update_tx_labels()
 410
 411     def get_num_tx(self, address):
 412         n = 0
 413         for tx in self.transactions.values():
 414             if address in map(lambda x:x[0], tx.outputs): n += 1
 415         return n
 416
 417
 418     def get_address_flags(self, addr):
 419         flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-"
 420         flags += "F" if addr in self.frozen_addresses else "P" if addr in self.prioritized_addresses else "-"
 421         return flags
 422
 423
 424     def get_tx_value(self, tx, addresses=None):
 425         if addresses is None: addresses = self.addresses(True)
 426         return tx.get_value(addresses, self.prevout_values)
 427
 428
 429
 430     def update_tx_outputs(self, tx_hash):
 431         tx = self.transactions.get(tx_hash)
 432         i = 0
 433         for item in tx.outputs:
 434             addr, value = item
 435             key = tx_hash+ ':%d'%i
 436             self.prevout_values[key] = value
 437             i += 1
 438
 439         for item in tx.inputs:
 440             if self.is_mine(item.get('address')):
 441                 key = item['prevout_hash'] + ':%d'%item['prevout_n']
 442                 self.spent_outputs.append(key)
 443
 444
 445     def get_addr_balance(self, address):
 446         assert self.is_mine(address)
 447         h = self.history.get(address,[])
 448         if h == ['*']: return 0,0
 449         c = u = 0
 450         received_coins = []   # list of coins received at address
 451
 452         for tx_hash, tx_height in h:
 453             tx = self.transactions.get(tx_hash)
 454             if not tx: continue
 455             i = 0
 456             for item in tx.outputs:
 457                 addr, value = item
 458                 if addr == address:
 459                     key = tx_hash + ':%d'%i
 460                     received_coins.append(key)
 461                 i +=1
 462
 463         for tx_hash, tx_height in h:
 464             tx = self.transactions.get(tx_hash)
 465             if not tx: continue
 466             v = 0
 467
 468             for item in tx.inputs:
 469                 addr = item.get('address')
 470                 if addr == address:
 471                     key = item['prevout_hash']  + ':%d'%item['prevout_n']
 472                     value = self.prevout_values.get( key )
 473                     if key in received_coins:
 474                         v -= value
 475
 476             i = 0
 477             for item in tx.outputs:
 478                 addr, value = item
 479                 key = tx_hash + ':%d'%i
 480                 if addr == address:
 481                     v += value
 482                 i += 1
 483
 484             if tx_height:
 485                 c += v
 486             else:
 487                 u += v
 488         return c, u
 489
 490     def get_account_addresses(self, a):
 491         ac = self.accounts[a]
 492         return ac[0] + ac[1]
 493
 494     def get_imported_balance(self):
 495         cc = uu = 0
 496         for addr in self.imported_keys.keys():
 497             c, u = self.get_addr_balance(addr)
 498             cc += c
 499             uu += u
 500         return cc, uu
 501
 502     def get_account_balance(self, account):
 503         conf = unconf = 0
 504         for addr in self.get_account_addresses(account):
 505             c, u = self.get_addr_balance(addr)
 506             conf += c
 507             unconf += u
 508         return conf, unconf
 509
 510     def get_balance(self):
 511         cc = uu = 0
 512         for a in self.accounts.keys():
 513             c, u = self.get_account_balance(a)
 514             cc += c
 515             uu += u
 516         c, u = self.get_imported_balance()
 517         cc += c
 518         uu += u
 519         return cc, uu
 520
 521
 522     def get_unspent_coins(self, domain=None):
 523         coins = []
 524         if domain is None: domain = self.addresses(True)
 525         for addr in domain:
 526             h = self.history.get(addr, [])
 527             if h == ['*']: continue
 528             for tx_hash, tx_height in h:
 529                 tx = self.transactions.get(tx_hash)
 530                 if tx is None: raise BaseException("Wallet not synchronized")
 531                 for output in tx.d.get('outputs'):
 532                     if output.get('address') != addr: continue
 533                     key = tx_hash + ":%d" % output.get('index')
 534                     if key in self.spent_outputs: continue
 535                     output['tx_hash'] = tx_hash
 536                     coins.append(output)
 537         return coins
 538
 539
 540
 541     def choose_tx_inputs( self, amount, fixed_fee, from_addr = None ):
 542         """ todo: minimize tx size """
 543         total = 0
 544         fee = self.fee if fixed_fee is None else fixed_fee
 545
 546         coins = []
 547         prioritized_coins = []
 548         domain = [from_addr] if from_addr else self.addresses(True)
 549         for i in self.frozen_addresses:
 550             if i in domain: domain.remove(i)
 551
 552         for i in self.prioritized_addresses:
 553             if i in domain: domain.remove(i)
 554
 555         coins = self.get_unspent_coins(domain)
 556         prioritized_coins = self.get_unspent_coins(self.prioritized_addresses)
 557
 558         inputs = []
 559         coins = prioritized_coins + coins
 560
 561         for item in coins:
 562             addr = item.get('address')
 563             v = item.get('value')
 564             total += v
 565
 566             inputs.append( item )
 567             if fixed_fee is None:
 568                 estimated_size =  len(inputs) * 180 + 80     # this assumes non-compressed keys
 569                 fee = self.fee * round(estimated_size/1024.)
 570                 if fee == 0: fee = self.fee
 571             else:
 572                 fee = fixed_fee
 573             if total >= amount + fee: break
 574         else:
 575             inputs = []
 576
 577         return inputs, total, fee
 578
 579
 580
 581     def add_tx_change( self, outputs, amount, fee, total, change_addr=None ):
 582         change_amount = total - ( amount + fee )
 583         if change_amount != 0:
 584             # normally, the update thread should ensure that the last change address is unused
 585             if not change_addr:
 586                 change_addresses = self.accounts[0][1]
 587                 change_addr = change_addresses[-self.gap_limit_for_change]
 588             # Insert the change output at a random position in the outputs
 589             posn = random.randint(0, len(outputs))
 590             outputs[posn:posn] = [( change_addr,  change_amount)]
 591         return outputs
 592
 593
 594     def get_history(self, address):
 595         with self.lock:
 596             return self.history.get(address)
 597
 598     def get_status(self, h):
 599         if not h: return None
 600         if h == ['*']: return '*'
 601         status = ''
 602         for tx_hash, height in h:
 603             status += tx_hash + ':%d:' % height
 604         return hashlib.sha256( status ).digest().encode('hex')
 605
 606
 607
 608     def receive_tx_callback(self, tx_hash, tx, tx_height):
 609
 610
 611         if not self.check_new_tx(tx_hash, tx):
 612             # may happen due to pruning
 613             print_error("received transaction that is no longer referenced in history", tx_hash)
 614             return
 615
 616         with self.transaction_lock:
 617             self.transactions[tx_hash] = tx
 618             if self.verifier and tx_height>0:
 619                 self.verifier.add(tx_hash, tx_height)
 620             self.update_tx_outputs(tx_hash)
 621
 622         self.save()
 623
 624
 625     def receive_history_callback(self, addr, hist):
 626
 627         if not self.check_new_history(addr, hist):
 628             raise BaseException("error: received history for %s is not consistent with known transactions"%addr)
 629
 630         with self.lock:
 631             self.history[addr] = hist
 632             self.save()
 633
 634         if hist != ['*']:
 635             for tx_hash, tx_height in hist:
 636                 if tx_height>0:
 637                     # add it in case it was previously unconfirmed
 638                     if self.verifier: self.verifier.add(tx_hash, tx_height)
 639
 640
 641     def get_tx_history(self):
 642         with self.transaction_lock:
 643             history = self.transactions.items()
 644             history.sort(key = lambda x: self.verifier.verified_tx.get(x[0]) if self.verifier.verified_tx.get(x[0]) else (1e12,0,0))
 645             result = []
 646
 647             balance = 0
 648             for tx_hash, tx in history:
 649                 is_mine, v, fee = self.get_tx_value(tx)
 650                 if v is not None: balance += v
 651             c, u = self.get_balance()
 652
 653             if balance != c+u:
 654                 v_str = format_satoshis( c+u - balance, True, self.num_zeros)
 655                 result.append( ('', 1000, 0, c+u-balance, None, c+u-balance, None ) )
 656
 657             balance = c + u - balance
 658             for tx_hash, tx in history:
 659                 conf, timestamp = self.verifier.get_confirmations(tx_hash) if self.verifier else (None, None)
 660                 is_mine, value, fee = self.get_tx_value(tx)
 661                 if value is not None:
 662                     balance += value
 663
 664                 result.append( (tx_hash, conf, is_mine, value, fee, balance, timestamp) )
 665
 666         return result
 667
 668
 669     def get_label(self, tx_hash):
 670         label = self.labels.get(tx_hash)
 671         is_default = (label == '') or (label is None)
 672         if is_default: label = self.get_default_label(tx_hash)
 673         return label, is_default
 674
 675
 676     def get_default_label(self, tx_hash):
 677         tx = self.transactions.get(tx_hash)
 678         default_label = ''
 679         if tx:
 680             is_mine, _, _ = self.get_tx_value(tx)
 681             if is_mine:
 682                 for o in tx.outputs:
 683                     o_addr, _ = o
 684                     if not self.is_mine(o_addr):
 685                         try:
 686                             default_label = self.labels[o_addr]
 687                         except KeyError:
 688                             default_label = o_addr
 689                         break
 690                 else:
 691                     default_label = '(internal)'
 692             else:
 693                 for o in tx.outputs:
 694                     o_addr, _ = o
 695                     if self.is_mine(o_addr) and not self.is_change(o_addr):
 696                         break
 697                 else:
 698                     for o in tx.outputs:
 699                         o_addr, _ = o
 700                         if self.is_mine(o_addr):
 701                             break
 702                     else:
 703                         o_addr = None
 704
 705                 if o_addr:
 706                     dest_label = self.labels.get(o_addr)
 707                     try:
 708                         default_label = self.labels[o_addr]
 709                     except KeyError:
 710                         default_label = o_addr
 711
 712         return default_label
 713
 714
 715     def mktx(self, outputs, password, fee=None, change_addr=None, from_addr= None):
 716
 717         for address, x in outputs:
 718             assert is_valid(address)
 719
 720         amount = sum( map(lambda x:x[1], outputs) )
 721         inputs, total, fee = self.choose_tx_inputs( amount, fee, from_addr )
 722         if not inputs:
 723             raise ValueError("Not enough funds")
 724
 725         if not self.use_change and not change_addr:
 726             change_addr = inputs[-1]['address']
 727             print_error( "Sending change to", change_addr )
 728         outputs = self.add_tx_change(outputs, amount, fee, total, change_addr)
 729
 730         tx = Transaction.from_io(inputs, outputs)
 731
 732         pk_addresses = []
 733         for i in range(len(tx.inputs)):
 734             txin = tx.inputs[i]
 735             address = txin['address']
 736             if address in self.imported_keys.keys():
 737                 pk_addresses.append(address)
 738                 continue
 739             account, sequence = self.get_address_index(address)
 740             txin['KeyID'] = (account, 'Electrum', sequence) # used by the server to find the key
 741             pk_addr, redeemScript = self.sequences[account].get_input_info(sequence)
 742             if redeemScript: txin['redeemScript'] = redeemScript
 743             pk_addresses.append(pk_addr)
 744
 745         # get all private keys at once.
 746         if self.seed:
 747             private_keys = self.get_private_keys(pk_addresses, password)
 748             tx.sign(private_keys)
 749
 750         for address, x in outputs:
 751             if address not in self.addressbook and not self.is_mine(address):
 752                 self.addressbook.append(address)
 753
 754         return tx
 755
 756
 757
 758     def sendtx(self, tx):
 759         # synchronous
 760         h = self.send_tx(tx)
 761         self.tx_event.wait()
 762         return self.receive_tx(h)
 763
 764     def send_tx(self, tx):
 765         # asynchronous
 766         self.tx_event.clear()
 767         self.interface.send([('blockchain.transaction.broadcast', [str(tx)])], 'synchronizer')
 768         return tx.hash()
 769
 770     def receive_tx(self,tx_hash):
 771         out = self.tx_result
 772         if out != tx_hash:
 773             return False, "error: " + out
 774         return True, out
 775
 776
 777
 778     def update_password(self, seed, old_password, new_password):
 779         if new_password == '': new_password = None
 780         self.use_encryption = (new_password != None)
 781         self.seed = pw_encode( seed, new_password)
 782         self.config.set_key('seed', self.seed, True)
 783         for k in self.imported_keys.keys():
 784             a = self.imported_keys[k]
 785             b = pw_decode(a, old_password)
 786             c = pw_encode(b, new_password)
 787             self.imported_keys[k] = c
 788         self.save()
 789
 790
 791
 792     def freeze(self,addr):
 793         if self.is_mine(addr) and addr not in self.frozen_addresses:
 794             self.unprioritize(addr)
 795             self.frozen_addresses.append(addr)
 796             self.config.set_key('frozen_addresses', self.frozen_addresses, True)
 797             return True
 798         else:
 799             return False
 800
 801     def unfreeze(self,addr):
 802         if self.is_mine(addr) and addr in self.frozen_addresses:
 803             self.frozen_addresses.remove(addr)
 804             self.config.set_key('frozen_addresses', self.frozen_addresses, True)
 805             return True
 806         else:
 807             return False
 808
 809     def prioritize(self,addr):
 810         if self.is_mine(addr) and addr not in self.prioritized_addresses:
 811             self.unfreeze(addr)
 812             self.prioritized_addresses.append(addr)
 813             self.config.set_key('prioritized_addresses', self.prioritized_addresses, True)
 814             return True
 815         else:
 816             return False
 817
 818     def unprioritize(self,addr):
 819         if self.is_mine(addr) and addr in self.prioritized_addresses:
 820             self.prioritized_addresses.remove(addr)
 821             self.config.set_key('prioritized_addresses', self.prioritized_addresses, True)
 822             return True
 823         else:
 824             return False
 825
 826     def save(self):
 827         tx = {}
 828         for k,v in self.transactions.items():
 829             tx[k] = str(v)
 830
 831         s = {
 832             'use_encryption': self.use_encryption,
 833             'use_change': self.use_change,
 834             'fee_per_kb': self.fee,
 835             'accounts': self.accounts,
 836             'addr_history': self.history,
 837             'labels': self.labels,
 838             'contacts': self.addressbook,
 839             'imported_keys': self.imported_keys,
 840             'num_zeros': self.num_zeros,
 841             'frozen_addresses': self.frozen_addresses,
 842             'prioritized_addresses': self.prioritized_addresses,
 843             'gap_limit': self.gap_limit,
 844             'transactions': tx,
 845         }
 846         for k, v in s.items():
 847             self.config.set_key(k,v)
 848         self.config.save()
 849
 850     def set_verifier(self, verifier):
 851         self.verifier = verifier
 852
 853         # review transactions that are in the history
 854         for addr, hist in self.history.items():
 855             if hist == ['*']: continue
 856             for tx_hash, tx_height in hist:
 857                 if tx_height>0:
 858                     # add it in case it was previously unconfirmed
 859                     self.verifier.add(tx_hash, tx_height)
 860
 861
 862         # if we are on a pruning server, remove unverified transactions
 863         vr = self.verifier.transactions.keys() + self.verifier.verified_tx.keys()
 864         for tx_hash in self.transactions.keys():
 865             if tx_hash not in vr:
 866                 self.transactions.pop(tx_hash)
 867
 868
 869
 870     def check_new_history(self, addr, hist):
 871
 872         # check that all tx in hist are relevant
 873         if hist != ['*']:
 874             for tx_hash, height in hist:
 875                 tx = self.transactions.get(tx_hash)
 876                 if not tx: continue
 877                 if not tx.has_address(addr):
 878                     return False
 879
 880         # check that we are not "orphaning" a transaction
 881         old_hist = self.history.get(addr,[])
 882         if old_hist == ['*']: return True
 883
 884         for tx_hash, height in old_hist:
 885             if tx_hash in map(lambda x:x[0], hist): continue
 886             found = False
 887             for _addr, _hist in self.history.items():
 888                 if _addr == addr: continue
 889                 if _hist == ['*']: continue
 890                 _tx_hist = map(lambda x:x[0], _hist)
 891                 if tx_hash in _tx_hist:
 892                     found = True
 893                     break
 894
 895             if not found:
 896                 tx = self.transactions.get(tx_hash)
 897                 # tx might not be there
 898                 if not tx: continue
 899
 900                 # already verified?
 901                 if self.verifier.get_height(tx_hash):
 902                     continue
 903                 # unconfirmed tx
 904                 print_error("new history is orphaning transaction:", tx_hash)
 905                 # check that all outputs are not mine, request histories
 906                 ext_requests = []
 907                 for _addr, _v in tx.outputs:
 908                     # assert not self.is_mine(_addr)
 909                     ext_requests.append( ('blockchain.address.get_history', [_addr]) )
 910
 911                 ext_h = self.interface.synchronous_get(ext_requests)
 912                 height = None
 913                 for h in ext_h:
 914                     if h == ['*']: continue
 915                     for item in h:
 916                         if item.get('tx_hash') == tx_hash:
 917                             height = item.get('height')
 918                 if height:
 919                     print_error("found height for", tx_hash, height)
 920                     self.verifier.add(tx_hash, height)
 921                 else:
 922                     print_error("removing orphaned tx from history", tx_hash)
 923                     self.transactions.pop(tx_hash)
 924
 925         return True
 926
 927
 928
 929     def check_new_tx(self, tx_hash, tx):
 930         # 1 check that tx is referenced in addr_history.
 931         addresses = []
 932         for addr, hist in self.history.items():
 933             if hist == ['*']:continue
 934             for txh, height in hist:
 935                 if txh == tx_hash:
 936                     addresses.append(addr)
 937
 938         if not addresses:
 939             return False
 940
 941         # 2 check that referencing addresses are in the tx
 942         for addr in addresses:
 943             if not tx.has_address(addr):
 944                 return False
 945
 946         return True
 947
 948
 949
 950
 951 class WalletSynchronizer(threading.Thread):
 952
 953
 954     def __init__(self, wallet, config):
 955         threading.Thread.__init__(self)
 956         self.daemon = True
 957         self.wallet = wallet
 958         self.interface = self.wallet.interface
 959         self.interface.register_channel('synchronizer')
 960         self.wallet.interface.register_callback('connected', lambda: self.wallet.set_up_to_date(False))
 961         self.was_updated = True
 962         self.running = False
 963         self.lock = threading.Lock()
 964
 965     def stop(self):
 966         with self.lock: self.running = False
 967         self.interface.poke('synchronizer')
 968
 969     def is_running(self):
 970         with self.lock: return self.running
 971
 972
 973     def subscribe_to_addresses(self, addresses):
 974         messages = []
 975         for addr in addresses:
 976             messages.append(('blockchain.address.subscribe', [addr]))
 977         self.interface.send( messages, 'synchronizer')
 978
 979
 980     def run(self):
 981         with self.lock: self.running = True
 982
 983         requested_tx = []
 984         missing_tx = []
 985         requested_histories = {}
 986
 987         # request any missing transactions
 988         for history in self.wallet.history.values():
 989             if history == ['*']: continue
 990             for tx_hash, tx_height in history:
 991                 if self.wallet.transactions.get(tx_hash) is None and (tx_hash, tx_height) not in missing_tx:
 992                     missing_tx.append( (tx_hash, tx_height) )
 993         print_error("missing tx", missing_tx)
 994
 995         # wait until we are connected, in case the user is not connected
 996         while not self.interface.is_connected:
 997             time.sleep(1)
 998
 999         # subscriptions
1000         self.subscribe_to_addresses(self.wallet.addresses(True))
1001
1002         while self.is_running():
1003             # 1. create new addresses
1004             new_addresses = self.wallet.synchronize()
1005
1006             # request missing addresses
1007             if new_addresses:
1008                 self.subscribe_to_addresses(new_addresses)
1009
1010             # request missing transactions
1011             for tx_hash, tx_height in missing_tx:
1012                 if (tx_hash, tx_height) not in requested_tx:
1013                     self.interface.send([ ('blockchain.transaction.get',[tx_hash, tx_height]) ], 'synchronizer')
1014                     requested_tx.append( (tx_hash, tx_height) )
1015             missing_tx = []
1016
1017             # detect if situation has changed
1018             if not self.interface.is_up_to_date('synchronizer'):
1019                 if self.wallet.is_up_to_date():
1020                     self.wallet.set_up_to_date(False)
1021                     self.was_updated = True
1022             else:
1023                 if not self.wallet.is_up_to_date():
1024                     self.wallet.set_up_to_date(True)
1025                     self.was_updated = True
1026
1027             if self.was_updated:
1028                 self.interface.trigger_callback('updated')
1029                 self.was_updated = False
1030
1031             # 2. get a response
1032             r = self.interface.get_response('synchronizer')
1033
1034             # poke sends None. (needed during stop)
1035             if not r: continue
1036
1037             # 3. handle response
1038             method = r['method']
1039             params = r['params']
1040             result = r.get('result')
1041             error = r.get('error')
1042             if error:
1043                 print "error", r
1044                 continue
1045
1046             if method == 'blockchain.address.subscribe':
1047                 addr = params[0]
1048                 if self.wallet.get_status(self.wallet.get_history(addr)) != result:
1049                     if requested_histories.get(addr) is None:
1050                         self.interface.send([('blockchain.address.get_history', [addr])], 'synchronizer')
1051                         requested_histories[addr] = result
1052
1053             elif method == 'blockchain.address.get_history':
1054                 addr = params[0]
1055                 print_error("receiving history", addr, result)
1056                 if result == ['*']:
1057                     assert requested_histories.pop(addr) == '*'
1058                     self.wallet.receive_history_callback(addr, result)
1059                 else:
1060                     hist = []
1061                     # check that txids are unique
1062                     txids = []
1063                     for item in result:
1064                         tx_hash = item['tx_hash']
1065                         if tx_hash not in txids:
1066                             txids.append(tx_hash)
1067                             hist.append( (tx_hash, item['height']) )
1068
1069                     if len(hist) != len(result):
1070                         raise BaseException("error: server sent history with non-unique txid", result)
1071
1072                     # check that the status corresponds to what was announced
1073                     rs = requested_histories.pop(addr)
1074                     if self.wallet.get_status(hist) != rs:
1075                         raise BaseException("error: status mismatch: %s"%addr)
1076
1077                     # store received history
1078                     self.wallet.receive_history_callback(addr, hist)
1079
1080                     # request transactions that we don't have
1081                     for tx_hash, tx_height in hist:
1082                         if self.wallet.transactions.get(tx_hash) is None:
1083                             if (tx_hash, tx_height) not in requested_tx and (tx_hash, tx_height) not in missing_tx:
1084                                 missing_tx.append( (tx_hash, tx_height) )
1085
1086             elif method == 'blockchain.transaction.get':
1087                 tx_hash = params[0]
1088                 tx_height = params[1]
1089                 assert tx_hash == hash_encode(Hash(result.decode('hex')))
1090                 tx = Transaction(result)
1091                 self.wallet.receive_tx_callback(tx_hash, tx, tx_height)
1092                 self.was_updated = True
1093                 requested_tx.remove( (tx_hash, tx_height) )
1094                 print_error("received tx:", tx)
1095
1096             elif method == 'blockchain.transaction.broadcast':
1097                 self.wallet.tx_result = result
1098                 self.wallet.tx_event.set()
1099
1100             else:
1101                 print_error("Error: Unknown message:" + method + ", " + repr(params) + ", " + repr(result) )
1102
1103             if self.was_updated and not requested_tx:
1104                 self.interface.trigger_callback('updated')
1105                 self.was_updated = False
1106
1107