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',100000))
  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         self.receipt = None          # next receipt
 107
 108         # spv
 109         self.verifier = None
 110
 111         # there is a difference between wallet.up_to_date and interface.is_up_to_date()
 112         # interface.is_up_to_date() returns true when all requests have been answered and processed
 113         # wallet.up_to_date is true when the wallet is synchronized (stronger requirement)
 114
 115         self.up_to_date = False
 116         self.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             with self.lock:
 437                 self.prevout_values[key] = value
 438             i += 1
 439
 440         for item in tx.inputs:
 441             if self.is_mine(item.get('address')):
 442                 key = item['prevout_hash'] + ':%d'%item['prevout_n']
 443                 self.spent_outputs.append(key)
 444
 445
 446     def get_addr_balance(self, address):
 447         assert self.is_mine(address)
 448         h = self.history.get(address,[])
 449         if h == ['*']: return 0,0
 450         c = u = 0
 451         received_coins = []   # list of coins received at address
 452
 453         for tx_hash, tx_height in h:
 454             tx = self.transactions.get(tx_hash)
 455             if not tx: continue
 456             i = 0
 457             for item in tx.outputs:
 458                 addr, value = item
 459                 if addr == address:
 460                     key = tx_hash + ':%d'%i
 461                     received_coins.append(key)
 462                 i +=1
 463
 464         for tx_hash, tx_height in h:
 465             tx = self.transactions.get(tx_hash)
 466             if not tx: continue
 467             v = 0
 468
 469             for item in tx.inputs:
 470                 addr = item.get('address')
 471                 if addr == address:
 472                     key = item['prevout_hash']  + ':%d'%item['prevout_n']
 473                     value = self.prevout_values.get( key )
 474                     if key in received_coins:
 475                         v -= value
 476
 477             i = 0
 478             for item in tx.outputs:
 479                 addr, value = item
 480                 key = tx_hash + ':%d'%i
 481                 if addr == address:
 482                     v += value
 483                 i += 1
 484
 485             if tx_height:
 486                 c += v
 487             else:
 488                 u += v
 489         return c, u
 490
 491     def get_account_addresses(self, a):
 492         ac = self.accounts[a]
 493         return ac[0] + ac[1]
 494
 495     def get_imported_balance(self):
 496         cc = uu = 0
 497         for addr in self.imported_keys.keys():
 498             c, u = self.get_addr_balance(addr)
 499             cc += c
 500             uu += u
 501         return cc, uu
 502
 503     def get_account_balance(self, account):
 504         conf = unconf = 0
 505         for addr in self.get_account_addresses(account):
 506             c, u = self.get_addr_balance(addr)
 507             conf += c
 508             unconf += u
 509         return conf, unconf
 510
 511     def get_balance(self):
 512         cc = uu = 0
 513         for a in self.accounts.keys():
 514             c, u = self.get_account_balance(a)
 515             cc += c
 516             uu += u
 517         c, u = self.get_imported_balance()
 518         cc += c
 519         uu += u
 520         return cc, uu
 521
 522
 523     def get_unspent_coins(self, domain=None):
 524         coins = []
 525         if domain is None: domain = self.addresses(True)
 526         for addr in domain:
 527             h = self.history.get(addr, [])
 528             if h == ['*']: continue
 529             for tx_hash, tx_height in h:
 530                 tx = self.transactions.get(tx_hash)
 531                 if tx is None: raise BaseException("Wallet not synchronized")
 532                 for output in tx.d.get('outputs'):
 533                     if output.get('address') != addr: continue
 534                     key = tx_hash + ":%d" % output.get('index')
 535                     if key in self.spent_outputs: continue
 536                     output['tx_hash'] = tx_hash
 537                     coins.append(output)
 538         return coins
 539
 540
 541
 542     def choose_tx_inputs( self, amount, fixed_fee, from_addr = None ):
 543         """ todo: minimize tx size """
 544         total = 0
 545         fee = self.fee if fixed_fee is None else fixed_fee
 546
 547         coins = []
 548         prioritized_coins = []
 549         domain = [from_addr] if from_addr else self.addresses(True)
 550         for i in self.frozen_addresses:
 551             if i in domain: domain.remove(i)
 552
 553         for i in self.prioritized_addresses:
 554             if i in domain: domain.remove(i)
 555
 556         coins = self.get_unspent_coins(domain)
 557         prioritized_coins = self.get_unspent_coins(self.prioritized_addresses)
 558
 559         inputs = []
 560         coins = prioritized_coins + coins
 561
 562         for item in coins:
 563             addr = item.get('address')
 564             v = item.get('value')
 565             total += v
 566
 567             inputs.append( item )
 568             fee = self.fee*len(inputs) if fixed_fee is None else fixed_fee
 569             if total >= amount + fee: break
 570         else:
 571             #print "not enough funds: %s %s"%(format_satoshis(total), format_satoshis(fee))
 572             inputs = []
 573
 574         return inputs, total, fee
 575
 576     def add_tx_change( self, outputs, amount, fee, total, change_addr=None ):
 577         change_amount = total - ( amount + fee )
 578         if change_amount != 0:
 579             # normally, the update thread should ensure that the last change address is unused
 580             if not change_addr:
 581                 change_addresses = self.accounts[0][1]
 582                 change_addr = change_addresses[-self.gap_limit_for_change]
 583             # Insert the change output at a random position in the outputs
 584             posn = random.randint(0, len(outputs))
 585             outputs[posn:posn] = [( change_addr,  change_amount)]
 586         return outputs
 587
 588
 589     def get_history(self, address):
 590         with self.lock:
 591             return self.history.get(address)
 592
 593     def get_status(self, h):
 594         if not h: return None
 595         if h == ['*']: return '*'
 596         status = ''
 597         for tx_hash, height in h:
 598             status += tx_hash + ':%d:' % height
 599         return hashlib.sha256( status ).digest().encode('hex')
 600
 601
 602
 603     def receive_tx_callback(self, tx_hash, tx, tx_height):
 604
 605         if not self.check_new_tx(tx_hash, tx):
 606             # may happen due to pruning
 607             print_error("received transaction that is no longer referenced in history", tx_hash)
 608             return
 609
 610         with self.lock:
 611             self.transactions[tx_hash] = tx
 612
 613         #tx_height = tx.get('height')
 614         if self.verifier and tx_height>0:
 615             self.verifier.add(tx_hash, tx_height)
 616
 617         self.update_tx_outputs(tx_hash)
 618
 619         self.save()
 620
 621
 622     def receive_history_callback(self, addr, hist):
 623
 624         if not self.check_new_history(addr, hist):
 625             raise BaseException("error: received history for %s is not consistent with known transactions"%addr)
 626
 627         with self.lock:
 628             self.history[addr] = hist
 629             self.save()
 630
 631         if hist != ['*']:
 632             for tx_hash, tx_height in hist:
 633                 if tx_height>0:
 634                     # add it in case it was previously unconfirmed
 635                     if self.verifier: self.verifier.add(tx_hash, tx_height)
 636
 637
 638     def get_tx_history(self):
 639         with self.lock:
 640             history = self.transactions.items()
 641         history.sort(key = lambda x: self.verifier.get_height(x[0]) if self.verifier.get_height(x[0]) else 1e12)
 642         result = []
 643
 644         balance = 0
 645         for tx_hash, tx in history:
 646             is_mine, v, fee = self.get_tx_value(tx)
 647             if v is not None: balance += v
 648         c, u = self.get_balance()
 649
 650         if balance != c+u:
 651             v_str = format_satoshis( c+u - balance, True, self.num_zeros)
 652             result.append( ('', 1000, 0, c+u-balance, None, c+u-balance, None ) )
 653
 654         balance = c + u - balance
 655         for tx_hash, tx in history:
 656             conf, timestamp = self.verifier.get_confirmations(tx_hash) if self.verifier else (None, None)
 657             is_mine, value, fee = self.get_tx_value(tx)
 658             if value is not None:
 659                 balance += value
 660
 661             result.append( (tx_hash, conf, is_mine, value, fee, balance, timestamp) )
 662
 663         return result
 664
 665
 666     def get_label(self, tx_hash):
 667         label = self.labels.get(tx_hash)
 668         is_default = (label == '') or (label is None)
 669         if is_default: label = self.get_default_label(tx_hash)
 670         return label, is_default
 671
 672
 673     def get_default_label(self, tx_hash):
 674         tx = self.transactions.get(tx_hash)
 675         default_label = ''
 676         if tx:
 677             is_mine, _, _ = self.get_tx_value(tx)
 678             if is_mine:
 679                 for o in tx.outputs:
 680                     o_addr, _ = o
 681                     if not self.is_mine(o_addr):
 682                         try:
 683                             default_label = self.labels[o_addr]
 684                         except KeyError:
 685                             default_label = o_addr
 686                         break
 687                 else:
 688                     default_label = '(internal)'
 689             else:
 690                 for o in tx.outputs:
 691                     o_addr, _ = o
 692                     if self.is_mine(o_addr) and not self.is_change(o_addr):
 693                         break
 694                 else:
 695                     for o in tx.outputs:
 696                         o_addr, _ = o
 697                         if self.is_mine(o_addr):
 698                             break
 699                     else:
 700                         o_addr = None
 701
 702                 if o_addr:
 703                     dest_label = self.labels.get(o_addr)
 704                     try:
 705                         default_label = self.labels[o_addr]
 706                     except KeyError:
 707                         default_label = o_addr
 708
 709         return default_label
 710
 711
 712     def mktx(self, outputs, password, fee=None, change_addr=None, from_addr= None):
 713
 714         for address, x in outputs:
 715             assert is_valid(address)
 716
 717         amount = sum( map(lambda x:x[1], outputs) )
 718         inputs, total, fee = self.choose_tx_inputs( amount, fee, from_addr )
 719         if not inputs:
 720             raise ValueError("Not enough funds")
 721
 722         if not self.use_change and not change_addr:
 723             change_addr = inputs[-1]['address']
 724             print_error( "Sending change to", change_addr )
 725         outputs = self.add_tx_change(outputs, amount, fee, total, change_addr)
 726
 727         tx = Transaction.from_io(inputs, outputs)
 728
 729         pk_addresses = []
 730         for i in range(len(tx.inputs)):
 731             txin = tx.inputs[i]
 732             address = txin['address']
 733             if address in self.imported_keys.keys():
 734                 pk_addresses.append(address)
 735                 continue
 736             account, sequence = self.get_address_index(address)
 737             txin['KeyID'] = (account, 'Electrum', sequence) # used by the server to find the key
 738             pk_addr, redeemScript = self.sequences[account].get_input_info(sequence)
 739             if redeemScript: txin['redeemScript'] = redeemScript
 740             pk_addresses.append(pk_addr)
 741
 742         # get all private keys at once.
 743         if self.seed:
 744             private_keys = self.get_private_keys(pk_addresses, password)
 745             tx.sign(private_keys)
 746
 747         for address, x in outputs:
 748             if address not in self.addressbook and not self.is_mine(address):
 749                 self.addressbook.append(address)
 750
 751         return tx
 752
 753
 754
 755     def sendtx(self, tx):
 756         # synchronous
 757         h = self.send_tx(tx)
 758         self.tx_event.wait()
 759         return self.receive_tx(h)
 760
 761     def send_tx(self, tx):
 762         # asynchronous
 763         self.tx_event.clear()
 764         self.interface.send([('blockchain.transaction.broadcast', [str(tx)])], 'synchronizer')
 765         return tx.hash()
 766
 767     def receive_tx(self,tx_hash):
 768         out = self.tx_result
 769         if out != tx_hash:
 770             return False, "error: " + out
 771         if self.receipt:
 772             self.receipts[tx_hash] = self.receipt
 773             self.receipt = None
 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': 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
 863
 864     def check_new_history(self, addr, hist):
 865
 866         # check that all tx in hist are relevant
 867         if hist != ['*']:
 868             for tx_hash, height in hist:
 869                 tx = self.transactions.get(tx_hash)
 870                 if not tx: continue
 871                 if not tx.has_address(addr):
 872                     return False
 873
 874         # check that we are not "orphaning" a transaction
 875         old_hist = self.history.get(addr,[])
 876         if old_hist == ['*']: return True
 877
 878         for tx_hash, height in old_hist:
 879             if tx_hash in map(lambda x:x[0], hist): continue
 880             found = False
 881             for _addr, _hist in self.history.items():
 882                 if _addr == addr: continue
 883                 if _hist == ['*']: continue
 884                 _tx_hist = map(lambda x:x[0], _hist)
 885                 if tx_hash in _tx_hist:
 886                     found = True
 887                     break
 888
 889             if not found:
 890                 tx = self.transactions.get(tx_hash)
 891                 # tx might not be there
 892                 if not tx: continue
 893
 894                 # already verified?
 895                 if self.verifier.get_height(tx_hash):
 896                     continue
 897                 # unconfirmed tx
 898                 print_error("new history is orphaning transaction:", tx_hash)
 899                 # check that all outputs are not mine, request histories
 900                 ext_requests = []
 901                 for _addr, _v in tx.outputs:
 902                     # assert not self.is_mine(_addr)
 903                     ext_requests.append( ('blockchain.address.get_history', [_addr]) )
 904
 905                 ext_h = self.interface.synchronous_get(ext_requests)
 906                 height = None
 907                 for h in ext_h:
 908                     if h == ['*']: continue
 909                     for item in h:
 910                         if item.get('tx_hash') == tx_hash:
 911                             height = item.get('height')
 912                 if height:
 913                     print_error("found height for", tx_hash, height)
 914                     self.verifier.add(tx_hash, height)
 915                 else:
 916                     print_error("removing orphaned tx from history", tx_hash)
 917                     self.transactions.pop(tx_hash)
 918
 919         return True
 920
 921
 922
 923     def check_new_tx(self, tx_hash, tx):
 924         # 1 check that tx is referenced in addr_history.
 925         addresses = []
 926         for addr, hist in self.history.items():
 927             if hist == ['*']:continue
 928             for txh, height in hist:
 929                 if txh == tx_hash:
 930                     addresses.append(addr)
 931
 932         if not addresses:
 933             return False
 934
 935         # 2 check that referencing addresses are in the tx
 936         for addr in addresses:
 937             if not tx.has_address(addr):
 938                 return False
 939
 940         return True
 941
 942
 943
 944
 945 class WalletSynchronizer(threading.Thread):
 946
 947
 948     def __init__(self, wallet, config):
 949         threading.Thread.__init__(self)
 950         self.daemon = True
 951         self.wallet = wallet
 952         self.interface = self.wallet.interface
 953         self.interface.register_channel('synchronizer')
 954         self.wallet.interface.register_callback('connected', lambda: self.wallet.set_up_to_date(False))
 955         self.was_updated = True
 956         self.running = False
 957         self.lock = threading.Lock()
 958
 959     def stop(self):
 960         with self.lock: self.running = False
 961         self.interface.poke('synchronizer')
 962
 963     def is_running(self):
 964         with self.lock: return self.running
 965
 966
 967     def subscribe_to_addresses(self, addresses):
 968         messages = []
 969         for addr in addresses:
 970             messages.append(('blockchain.address.subscribe', [addr]))
 971         self.interface.send( messages, 'synchronizer')
 972
 973
 974     def run(self):
 975         with self.lock: self.running = True
 976
 977         requested_tx = []
 978         missing_tx = []
 979         requested_histories = {}
 980
 981         # request any missing transactions
 982         for history in self.wallet.history.values():
 983             if history == ['*']: continue
 984             for tx_hash, tx_height in history:
 985                 if self.wallet.transactions.get(tx_hash) is None and (tx_hash, tx_height) not in missing_tx:
 986                     missing_tx.append( (tx_hash, tx_height) )
 987         print_error("missing tx", missing_tx)
 988
 989         # wait until we are connected, in case the user is not connected
 990         while not self.interface.is_connected:
 991             time.sleep(1)
 992
 993         # subscriptions
 994         self.subscribe_to_addresses(self.wallet.addresses(True))
 995
 996         while self.is_running():
 997             # 1. create new addresses
 998             new_addresses = self.wallet.synchronize()
 999
1000             # request missing addresses
1001             if new_addresses:
1002                 self.subscribe_to_addresses(new_addresses)
1003
1004             # request missing transactions
1005             for tx_hash, tx_height in missing_tx:
1006                 if (tx_hash, tx_height) not in requested_tx:
1007                     self.interface.send([ ('blockchain.transaction.get',[tx_hash, tx_height]) ], 'synchronizer')
1008                     requested_tx.append( (tx_hash, tx_height) )
1009             missing_tx = []
1010
1011             # detect if situation has changed
1012             if not self.interface.is_up_to_date('synchronizer'):
1013                 if self.wallet.is_up_to_date():
1014                     self.wallet.set_up_to_date(False)
1015                     self.was_updated = True
1016             else:
1017                 if not self.wallet.is_up_to_date():
1018                     self.wallet.set_up_to_date(True)
1019                     self.was_updated = True
1020
1021             if self.was_updated:
1022                 self.interface.trigger_callback('updated')
1023                 self.was_updated = False
1024
1025             # 2. get a response
1026             r = self.interface.get_response('synchronizer')
1027
1028             # poke sends None. (needed during stop)
1029             if not r: continue
1030
1031             # 3. handle response
1032             method = r['method']
1033             params = r['params']
1034             result = r.get('result')
1035             error = r.get('error')
1036             if error:
1037                 print "error", r
1038                 continue
1039
1040             if method == 'blockchain.address.subscribe':
1041                 addr = params[0]
1042                 if self.wallet.get_status(self.wallet.get_history(addr)) != result:
1043                     if requested_histories.get(addr) is None:
1044                         self.interface.send([('blockchain.address.get_history', [addr])], 'synchronizer')
1045                         requested_histories[addr] = result
1046
1047             elif method == 'blockchain.address.get_history':
1048                 addr = params[0]
1049                 print_error("receiving history", addr, result)
1050                 if result == ['*']:
1051                     assert requested_histories.pop(addr) == '*'
1052                     self.wallet.receive_history_callback(addr, result)
1053                 else:
1054                     hist = []
1055                     # check that txids are unique
1056                     txids = []
1057                     for item in result:
1058                         tx_hash = item['tx_hash']
1059                         if tx_hash not in txids:
1060                             txids.append(tx_hash)
1061                             hist.append( (tx_hash, item['height']) )
1062
1063                     if len(hist) != len(result):
1064                         raise BaseException("error: server sent history with non-unique txid", result)
1065
1066                     # check that the status corresponds to what was announced
1067                     rs = requested_histories.pop(addr)
1068                     if self.wallet.get_status(hist) != rs:
1069                         raise BaseException("error: status mismatch: %s"%addr)
1070
1071                     # store received history
1072                     self.wallet.receive_history_callback(addr, hist)
1073
1074                     # request transactions that we don't have
1075                     for tx_hash, tx_height in hist:
1076                         if self.wallet.transactions.get(tx_hash) is None:
1077                             if (tx_hash, tx_height) not in requested_tx and (tx_hash, tx_height) not in missing_tx:
1078                                 missing_tx.append( (tx_hash, tx_height) )
1079
1080             elif method == 'blockchain.transaction.get':
1081                 tx_hash = params[0]
1082                 tx_height = params[1]
1083                 assert tx_hash == hash_encode(Hash(result.decode('hex')))
1084                 tx = Transaction(result)
1085                 self.wallet.receive_tx_callback(tx_hash, tx, tx_height)
1086                 self.was_updated = True
1087                 requested_tx.remove( (tx_hash, tx_height) )
1088                 print_error("received tx:", tx)
1089
1090             elif method == 'blockchain.transaction.broadcast':
1091                 self.wallet.tx_result = result
1092                 self.wallet.tx_event.set()
1093
1094             else:
1095                 print_error("Error: Unknown message:" + method + ", " + repr(params) + ", " + repr(result) )
1096
1097             if self.was_updated and not requested_tx:
1098                 self.interface.trigger_callback('updated')
1099                 self.was_updated = False
1100
1101