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, format_satoshis
  34 from bitcoin import *
  35 from account import *
  36 from transaction import Transaction
  37
  38 # AES encryption
  39 EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
  40 DecodeAES = lambda secret, e: aes.decryptData(secret, base64.b64decode(e))
  41
  42 def pw_encode(s, password):
  43     if password:
  44         secret = Hash(password)
  45         return EncodeAES(secret, s)
  46     else:
  47         return s
  48
  49 def pw_decode(s, password):
  50     if password is not None:
  51         secret = Hash(password)
  52         try:
  53             d = DecodeAES(secret, s)
  54         except:
  55             raise BaseException('Invalid password')
  56         return d
  57     else:
  58         return s
  59
  60
  61
  62
  63
  64 from version import ELECTRUM_VERSION, SEED_VERSION
  65
  66
  67 class WalletStorage:
  68
  69     def __init__(self, config):
  70         self.data = {}
  71         self.file_exists = False
  72         self.init_path(config)
  73         print_error( "wallet path", self.path )
  74         if self.path:
  75             self.read(self.path)
  76
  77
  78     def init_path(self, config):
  79         """Set the path of the wallet."""
  80
  81         path = config.get('wallet_path')
  82         if not path:
  83             path = config.get('default_wallet_path')
  84         if path is not None:
  85             self.path = path
  86             return
  87
  88         self.path = os.path.join(config.path, "electrum.dat")
  89
  90
  91     def read(self, path):
  92         """Read the contents of the wallet file."""
  93         try:
  94             with open(self.path, "r") as f:
  95                 data = f.read()
  96         except IOError:
  97             return
  98         try:
  99             d = ast.literal_eval( data )  #parse raw data from reading wallet file
 100         except:
 101             raise IOError("Cannot read wallet file.")
 102
 103         self.data = d
 104         self.file_exists = True
 105
 106
 107     def get(self, key, default=None):
 108         return self.data.get(key, default)
 109
 110     def put(self, key, value, save = True):
 111
 112         if self.data.get(key) is not None:
 113             self.data[key] = value
 114         else:
 115             # add key to wallet config
 116             self.data[key] = value
 117
 118         if save:
 119             self.write()
 120
 121
 122     def write(self):
 123         s = repr(self.data)
 124         f = open(self.path,"w")
 125         f.write( s )
 126         f.close()
 127         if self.get('gui') != 'android':
 128             import stat
 129             os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE)
 130
 131
 132 class Wallet:
 133
 134     def __init__(self, storage):
 135
 136         self.storage = storage
 137         self.electrum_version = ELECTRUM_VERSION
 138         self.gap_limit_for_change = 3 # constant
 139
 140         # saved fields
 141         self.seed_version          = storage.get('seed_version', SEED_VERSION)
 142
 143         self.gap_limit             = storage.get('gap_limit', 5)
 144         self.use_change            = storage.get('use_change',True)
 145         self.use_encryption        = storage.get('use_encryption', False)
 146         self.seed                  = storage.get('seed', '')               # encrypted
 147         self.labels                = storage.get('labels', {})
 148         self.frozen_addresses      = storage.get('frozen_addresses',[])
 149         self.prioritized_addresses = storage.get('prioritized_addresses',[])
 150         self.addressbook           = storage.get('contacts', [])
 151
 152         self.imported_keys         = storage.get('imported_keys',{})
 153         self.history               = storage.get('addr_history',{})        # address -> list(txid, height)
 154
 155         self.fee                   = int(storage.get('fee_per_kb',20000))
 156
 157         self.master_public_keys = storage.get('master_public_keys',{})
 158         self.master_private_keys = storage.get('master_private_keys', {})
 159
 160         self.next_addresses = storage.get('next_addresses',{})
 161
 162         if self.seed_version < 4:
 163             raise ValueError("This wallet seed is deprecated.")
 164
 165         self.load_accounts()
 166
 167         self.transactions = {}
 168         tx_list = self.storage.get('transactions',{})
 169         for k,v in tx_list.items():
 170             try:
 171                 tx = Transaction(v)
 172             except:
 173                 print_msg("Warning: Cannot deserialize transactions. skipping")
 174                 continue
 175
 176             self.add_extra_addresses(tx)
 177             self.transactions[k] = tx
 178
 179         for h,tx in self.transactions.items():
 180             if not self.check_new_tx(h, tx):
 181                 print_error("removing unreferenced tx", h)
 182                 self.transactions.pop(h)
 183
 184
 185         # not saved
 186         self.prevout_values = {}     # my own transaction outputs
 187         self.spent_outputs = []
 188
 189         # spv
 190         self.verifier = None
 191
 192         # there is a difference between wallet.up_to_date and interface.is_up_to_date()
 193         # interface.is_up_to_date() returns true when all requests have been answered and processed
 194         # wallet.up_to_date is true when the wallet is synchronized (stronger requirement)
 195
 196         self.up_to_date = False
 197         self.lock = threading.Lock()
 198         self.transaction_lock = threading.Lock()
 199         self.tx_event = threading.Event()
 200
 201         for tx_hash, tx in self.transactions.items():
 202             self.update_tx_outputs(tx_hash)
 203
 204
 205     def add_extra_addresses(self, tx):
 206         h = tx.hash()
 207         # find the address corresponding to pay-to-pubkey inputs
 208         tx.add_extra_addresses(self.transactions)
 209         for o in tx.d.get('outputs'):
 210             if o.get('is_pubkey'):
 211                 for tx2 in self.transactions.values():
 212                     tx2.add_extra_addresses({h:tx})
 213
 214
 215
 216
 217     def set_up_to_date(self,b):
 218         with self.lock: self.up_to_date = b
 219
 220
 221     def is_up_to_date(self):
 222         with self.lock: return self.up_to_date
 223
 224
 225     def update(self):
 226         self.up_to_date = False
 227         while not self.is_up_to_date():
 228             time.sleep(0.1)
 229
 230
 231     def import_key(self, sec, password):
 232         # check password
 233         seed = self.decode_seed(password)
 234         try:
 235             address = address_from_private_key(sec)
 236         except:
 237             raise BaseException('Invalid private key')
 238
 239         if self.is_mine(address):
 240             raise BaseException('Address already in wallet')
 241
 242         # store the originally requested keypair into the imported keys table
 243         self.imported_keys[address] = pw_encode(sec, password )
 244         self.storage.put('imported_keys', self.imported_keys, True)
 245         if self.synchronizer:
 246             self.synchronizer.subscribe_to_addresses([address])
 247         return address
 248
 249     def delete_imported_key(self, addr):
 250         if addr in self.imported_keys:
 251             self.imported_keys.pop(addr)
 252             self.storage.put('imported_keys', self.imported_keys, True)
 253
 254
 255     def init_seed(self, seed):
 256         if self.seed: raise BaseException("a seed exists")
 257         if not seed:
 258             seed = random_seed(128)
 259         self.seed = seed
 260
 261
 262     def save_seed(self):
 263         self.storage.put('seed', self.seed, True)
 264         self.storage.put('seed_version', self.seed_version, True)
 265
 266     def create_watching_only_wallet(self, c0, K0):
 267         cK0 = ""
 268         self.master_public_keys = {
 269             "m/0'/": (c0, K0, cK0),
 270             }
 271         self.storage.put('master_public_keys', self.master_public_keys, True)
 272         self.create_account('1','Main account')
 273
 274     def create_accounts(self):
 275
 276         master_k, master_c, master_K, master_cK = bip32_init(self.seed)
 277
 278         # normal accounts
 279         k0, c0, K0, cK0 = bip32_private_derivation(master_k, master_c, "m/", "m/0'/")
 280         # p2sh 2of2
 281         k1, c1, K1, cK1 = bip32_private_derivation(master_k, master_c, "m/", "m/1'/")
 282         k2, c2, K2, cK2 = bip32_private_derivation(master_k, master_c, "m/", "m/2'/")
 283         # p2sh 2of3
 284         k3, c3, K3, cK3 = bip32_private_derivation(master_k, master_c, "m/", "m/3'/")
 285         k4, c4, K4, cK4 = bip32_private_derivation(master_k, master_c, "m/", "m/4'/")
 286         k5, c5, K5, cK5 = bip32_private_derivation(master_k, master_c, "m/", "m/5'/")
 287
 288         self.master_public_keys = {
 289             "m/0'/": (c0, K0, cK0),
 290             "m/1'/": (c1, K1, cK1),
 291             "m/2'/": (c2, K2, cK2),
 292             "m/3'/": (c3, K3, cK3),
 293             "m/4'/": (c4, K4, cK4),
 294             "m/5'/": (c5, K5, cK5)
 295             }
 296
 297         self.master_private_keys = {
 298             "m/0'/": k0,
 299             "m/1'/": k1,
 300             "m/2'/": k2,
 301             "m/3'/": k3,
 302             "m/4'/": k4,
 303             "m/5'/": k5
 304             }
 305
 306         self.storage.put('master_public_keys', self.master_public_keys, True)
 307         self.storage.put('master_private_keys', self.master_private_keys, True)
 308
 309         # create default account
 310         self.create_account('1','Main account')
 311
 312
 313     def find_root_by_master_key(self, c, K):
 314         for key, v in self.master_public_keys.items():
 315             if key == "m/":continue
 316             cc, KK, _ = v
 317             if (c == cc) and (K == KK):
 318                 return key
 319
 320     def deseed_root(self, seed, password):
 321         # for safety, we ask the user to enter their seed
 322         assert seed == self.decode_seed(password)
 323         self.seed = ''
 324         self.storage.put('seed', '', True)
 325
 326
 327     def deseed_branch(self, k):
 328         # check that parent has no seed
 329         assert self.seed == ''
 330         self.master_private_keys.pop(k)
 331         self.storage.put('master_private_keys', self.master_private_keys, True)
 332
 333
 334     def account_id(self, account_type, i):
 335         if account_type == '1':
 336             return "m/0'/%d"%i
 337         elif account_type == '2of2':
 338             return "m/1'/%d & m/2'/%d"%(i,i)
 339         elif account_type == '2of3':
 340             return "m/3'/%d & m/4'/%d & m/5'/%d"%(i,i,i)
 341         else:
 342             raise BaseException('unknown account type')
 343
 344
 345     def num_accounts(self, account_type):
 346         keys = self.accounts.keys()
 347         i = 0
 348         while True:
 349             account_id = self.account_id(account_type, i)
 350             if account_id not in keys: break
 351             i += 1
 352         return i
 353
 354
 355     def new_account_address(self, account_type = '1'):
 356         i = self.num_accounts(account_type)
 357         k = self.account_id(account_type,i)
 358
 359         addr = self.next_addresses.get(k)
 360         if not addr:
 361             account_id, account = self.next_account(account_type)
 362             addr = account.first_address()
 363             self.next_addresses[k] = addr
 364             self.storage.put('next_addresses',self.next_addresses)
 365
 366         return addr
 367
 368
 369     def next_account(self, account_type = '1'):
 370
 371         i = self.num_accounts(account_type)
 372         account_id = self.account_id(account_type,i)
 373
 374         if account_type is '1':
 375             master_c0, master_K0, _ = self.master_public_keys["m/0'/"]
 376             c0, K0, cK0 = bip32_public_derivation(master_c0.decode('hex'), master_K0.decode('hex'), "m/0'/", "m/0'/%d"%i)
 377             account = BIP32_Account({ 'c':c0, 'K':K0, 'cK':cK0 })
 378
 379         elif account_type == '2of2':
 380             master_c1, master_K1, _ = self.master_public_keys["m/1'/"]
 381             c1, K1, cK1 = bip32_public_derivation(master_c1.decode('hex'), master_K1.decode('hex'), "m/1'/", "m/1'/%d"%i)
 382             master_c2, master_K2, _ = self.master_public_keys["m/2'/"]
 383             c2, K2, cK2 = bip32_public_derivation(master_c2.decode('hex'), master_K2.decode('hex'), "m/2'/", "m/2'/%d"%i)
 384             account = BIP32_Account_2of2({ 'c':c1, 'K':K1, 'cK':cK1, 'c2':c2, 'K2':K2, 'cK2':cK2 })
 385
 386         elif account_type == '2of3':
 387             master_c3, master_K3, _ = self.master_public_keys["m/3'/"]
 388             c3, K3, cK3 = bip32_public_derivation(master_c3.decode('hex'), master_K3.decode('hex'), "m/3'/", "m/3'/%d"%i)
 389             master_c4, master_K4, _ = self.master_public_keys["m/4'/"]
 390             c4, K4, cK4 = bip32_public_derivation(master_c4.decode('hex'), master_K4.decode('hex'), "m/4'/", "m/4'/%d"%i)
 391             master_c5, master_K5, _ = self.master_public_keys["m/5'/"]
 392             c5, K5, cK5 = bip32_public_derivation(master_c5.decode('hex'), master_K5.decode('hex'), "m/5'/", "m/5'/%d"%i)
 393             account = BIP32_Account_2of3({ 'c':c3, 'K':K3, 'cK':cK3, 'c2':c4, 'K2':K4, 'cK2':cK4, 'c3':c5, 'K3':K5, 'cK3':cK5 })
 394
 395         return account_id, account
 396
 397
 398     def set_label(self, key, value):
 399         self.labels[key] = value
 400         self.storage.put('labels', self.labels, True)
 401
 402
 403     def create_account(self, account_type = '1', name = None):
 404         account_id, account = self.next_account(account_type)
 405         self.accounts[account_id] = account
 406         self.save_accounts()
 407         if name:
 408             self.set_label(account_id, name)
 409
 410
 411     def create_old_account(self):
 412         mpk = OldAccount.mpk_from_seed(self.seed)
 413         self.storage.put('master_public_key', mpk, True)
 414         self.accounts[0] = OldAccount({'mpk':mpk, 0:[], 1:[]})
 415         self.save_accounts()
 416
 417
 418     def save_accounts(self):
 419         d = {}
 420         for k, v in self.accounts.items():
 421             d[k] = v.dump()
 422         self.storage.put('accounts', d, True)
 423
 424
 425
 426     def load_accounts(self):
 427         d = self.storage.get('accounts', {})
 428         self.accounts = {}
 429         for k, v in d.items():
 430             if k == 0:
 431                 v['mpk'] = self.storage.get('master_public_key')
 432                 self.accounts[k] = OldAccount(v)
 433             elif '&' in k:
 434                 self.accounts[k] = BIP32_Account_2of2(v)
 435             else:
 436                 self.accounts[k] = BIP32_Account(v)
 437
 438
 439     def addresses(self, include_change = True, next=False):
 440         o = self.get_account_addresses(-1, include_change)
 441         for a in self.accounts.keys():
 442             o += self.get_account_addresses(a, include_change)
 443
 444         if next:
 445             for addr in self.next_addresses.values():
 446                 if addr not in o:
 447                     o += [addr]
 448         return o
 449
 450
 451     def is_mine(self, address):
 452         return address in self.addresses(True)
 453
 454
 455     def is_change(self, address):
 456         if not self.is_mine(address): return False
 457         if address in self.imported_keys.keys(): return False
 458         acct, s = self.get_address_index(address)
 459         if s is None: return False
 460         return s[0] == 1
 461
 462     def get_master_public_key(self):
 463         if self.seed_version == 4:
 464             return self.storage.get("master_public_key")
 465         else:
 466             c, K, cK = self.storage.get("master_public_keys")["m/0'/"]
 467             return repr((c, K))
 468
 469     def get_master_private_key(self, account, password):
 470         master_k = pw_decode( self.master_private_keys[account], password)
 471         master_c, master_K, master_Kc = self.master_public_keys[account]
 472         try:
 473             K, Kc = get_pubkeys_from_secret(master_k.decode('hex'))
 474             assert K.encode('hex') == master_K
 475         except:
 476             raise BaseException("Invalid password")
 477         return master_k
 478
 479
 480     def get_address_index(self, address):
 481         if address in self.imported_keys.keys():
 482             return -1, None
 483
 484         for account in self.accounts.keys():
 485             for for_change in [0,1]:
 486                 addresses = self.accounts[account].get_addresses(for_change)
 487                 for addr in addresses:
 488                     if address == addr:
 489                         return account, (for_change, addresses.index(addr))
 490
 491         raise BaseException("Address not found", address)
 492
 493
 494     def get_roots(self, account):
 495         roots = []
 496         for a in account.split('&'):
 497             s = a.strip()
 498             m = re.match("(m/\d+'/)(\d+)", s)
 499             roots.append( m.group(1) )
 500         return roots
 501
 502     def is_seeded(self, account):
 503         if type(account) is int:
 504             return self.seed is not None
 505
 506         for root in self.get_roots(account):
 507             if root not in self.master_private_keys.keys():
 508                 return False
 509         return True
 510
 511     def rebase_sequence(self, account, sequence):
 512         c, i = sequence
 513         dd = []
 514         for a in account.split('&'):
 515             s = a.strip()
 516             m = re.match("(m/\d+'/)(\d+)", s)
 517             root = m.group(1)
 518             num = int(m.group(2))
 519             dd.append( (root, [num,c,i] ) )
 520         return dd
 521
 522
 523     def get_keyID(self, account, sequence):
 524         if account == 0:
 525             return 'old'
 526
 527         rs = self.rebase_sequence(account, sequence)
 528         dd = []
 529         for root, public_sequence in rs:
 530             c, K, _ = self.master_public_keys[root]
 531             s = '/' + '/'.join( map(lambda x:str(x), public_sequence) )
 532             dd.append( 'bip32(%s,%s,%s)'%(c,K, s) )
 533         return '&'.join(dd)
 534
 535
 536     def get_public_key(self, address):
 537         account, sequence = self.get_address_index(address)
 538         return self.accounts[account].get_pubkey( *sequence )
 539
 540
 541     def decode_seed(self, password):
 542         seed = pw_decode(self.seed, password)
 543         #todo:  #self.sequences[0].check_seed(seed)
 544         return seed
 545
 546
 547     def get_private_key(self, address, password):
 548         out = []
 549         if address in self.imported_keys.keys():
 550             out.append( pw_decode( self.imported_keys[address], password ) )
 551         else:
 552             account, sequence = self.get_address_index(address)
 553             if account == 0:
 554                 seed = self.decode_seed(password)
 555                 pk = self.accounts[account].get_private_key(seed, sequence)
 556                 out.append(pk)
 557                 return out
 558
 559             # assert address == self.accounts[account].get_address(*sequence)
 560             rs = self.rebase_sequence( account, sequence)
 561             for root, public_sequence in rs:
 562
 563                 if root not in self.master_private_keys.keys(): continue
 564                 master_k = self.get_master_private_key(root, password)
 565                 master_c, _, _ = self.master_public_keys[root]
 566                 pk = bip32_private_key( public_sequence, master_k.decode('hex'), master_c.decode('hex'))
 567                 out.append(pk)
 568
 569         return out
 570
 571
 572
 573
 574     def signrawtransaction(self, tx, input_info, private_keys, password):
 575
 576         unspent_coins = self.get_unspent_coins()
 577         seed = self.decode_seed(password)
 578
 579         # build a list of public/private keys
 580         keypairs = {}
 581         for sec in private_keys:
 582             pubkey = public_key_from_private_key(sec)
 583             keypairs[ pubkey ] = sec
 584
 585
 586         for txin in tx.inputs:
 587             # convert to own format
 588             txin['tx_hash'] = txin['prevout_hash']
 589             txin['index'] = txin['prevout_n']
 590
 591             for item in input_info:
 592                 if item.get('txid') == txin['tx_hash'] and item.get('vout') == txin['index']:
 593                     txin['raw_output_script'] = item['scriptPubKey']
 594                     txin['redeemScript'] = item.get('redeemScript')
 595                     txin['KeyID'] = item.get('KeyID')
 596                     break
 597             else:
 598                 for item in unspent_coins:
 599                     if txin['tx_hash'] == item['tx_hash'] and txin['index'] == item['index']:
 600                         print_error( "tx input is in unspent coins" )
 601                         txin['raw_output_script'] = item['raw_output_script']
 602                         account, sequence = self.get_address_index(item['address'])
 603                         if account != -1:
 604                             txin['redeemScript'] = self.accounts[account].redeem_script(sequence)
 605                         break
 606                 else:
 607                     raise BaseException("Unknown transaction input. Please provide the 'input_info' parameter, or synchronize this wallet")
 608
 609             # if available, derive private_keys from KeyID
 610             keyid = txin.get('KeyID')
 611             if keyid:
 612                 roots = []
 613                 for s in keyid.split('&'):
 614                     m = re.match("bip32\(([0-9a-f]+),([0-9a-f]+),(/\d+/\d+/\d+)", s)
 615                     if not m: continue
 616                     c = m.group(1)
 617                     K = m.group(2)
 618                     sequence = m.group(3)
 619                     root = self.find_root_by_master_key(c,K)
 620                     if not root: continue
 621                     sequence = map(lambda x:int(x), sequence.strip('/').split('/'))
 622                     root = root + '%d'%sequence[0]
 623                     sequence = sequence[1:]
 624                     roots.append((root,sequence))
 625
 626                 account_id = " & ".join( map(lambda x:x[0], roots) )
 627                 account = self.accounts.get(account_id)
 628                 if not account: continue
 629                 addr = account.get_address(*sequence)
 630                 txin['address'] = addr
 631                 pk = self.get_private_key(addr, password)
 632                 for sec in pk:
 633                     pubkey = public_key_from_private_key(sec)
 634                     keypairs[pubkey] = sec
 635
 636             redeem_script = txin.get("redeemScript")
 637             print_error( "p2sh:", "yes" if redeem_script else "no")
 638             if redeem_script:
 639                 addr = hash_160_to_bc_address(hash_160(redeem_script.decode('hex')), 5)
 640             else:
 641                 import transaction
 642                 _, addr = transaction.get_address_from_output_script(txin["raw_output_script"].decode('hex'))
 643             txin['address'] = addr
 644
 645             # add private keys that are in the wallet
 646             pk = self.get_private_key(addr, password)
 647             for sec in pk:
 648                 pubkey = public_key_from_private_key(sec)
 649                 keypairs[pubkey] = sec
 650                 if not redeem_script:
 651                     txin['redeemPubkey'] = pubkey
 652
 653             print txin
 654
 655         tx.sign( keypairs )
 656
 657     def sign_message(self, address, message, password):
 658         keys = self.get_private_key(address, password)
 659         assert len(keys) == 1
 660         sec = keys[0]
 661         key = regenerate_key(sec)
 662         compressed = is_compressed(sec)
 663         return key.sign_message(message, compressed, address)
 664
 665     def verify_message(self, address, signature, message):
 666         try:
 667             EC_KEY.verify_message(address, signature, message)
 668             return True
 669         except BaseException as e:
 670             print_error("Verification error: {0}".format(e))
 671             return False
 672
 673
 674     def change_gap_limit(self, value):
 675         if value >= self.gap_limit:
 676             self.gap_limit = value
 677             self.storage.put('gap_limit', self.gap_limit, True)
 678             #self.interface.poke('synchronizer')
 679             return True
 680
 681         elif value >= self.min_acceptable_gap():
 682             for key, account in self.accounts.items():
 683                 addresses = account[0]
 684                 k = self.num_unused_trailing_addresses(addresses)
 685                 n = len(addresses) - k + value
 686                 addresses = addresses[0:n]
 687                 self.accounts[key][0] = addresses
 688
 689             self.gap_limit = value
 690             self.storage.put('gap_limit', self.gap_limit, True)
 691             self.save_accounts()
 692             return True
 693         else:
 694             return False
 695
 696     def num_unused_trailing_addresses(self, addresses):
 697         k = 0
 698         for a in addresses[::-1]:
 699             if self.history.get(a):break
 700             k = k + 1
 701         return k
 702
 703     def min_acceptable_gap(self):
 704         # fixme: this assumes wallet is synchronized
 705         n = 0
 706         nmax = 0
 707
 708         for account in self.accounts.values():
 709             addresses = account.get_addresses(0)
 710             k = self.num_unused_trailing_addresses(addresses)
 711             for a in addresses[0:-k]:
 712                 if self.history.get(a):
 713                     n = 0
 714                 else:
 715                     n += 1
 716                     if n > nmax: nmax = n
 717         return nmax + 1
 718
 719
 720     def address_is_old(self, address):
 721         age = -1
 722         h = self.history.get(address, [])
 723         if h == ['*']:
 724             return True
 725         for tx_hash, tx_height in h:
 726             if tx_height == 0:
 727                 tx_age = 0
 728             else:
 729                 tx_age = self.verifier.blockchain.height - tx_height + 1
 730             if tx_age > age:
 731                 age = tx_age
 732         return age > 2
 733
 734
 735     def synchronize_sequence(self, account, for_change):
 736         limit = self.gap_limit_for_change if for_change else self.gap_limit
 737         new_addresses = []
 738         while True:
 739             addresses = account.get_addresses(for_change)
 740             if len(addresses) < limit:
 741                 address = account.create_new_address(for_change)
 742                 self.history[address] = []
 743                 new_addresses.append( address )
 744                 continue
 745
 746             if map( lambda a: self.address_is_old(a), addresses[-limit:] ) == limit*[False]:
 747                 break
 748             else:
 749                 address = account.create_new_address(for_change)
 750                 self.history[address] = []
 751                 new_addresses.append( address )
 752
 753         return new_addresses
 754
 755
 756
 757     def create_pending_accounts(self):
 758         for account_type in ['1','2of2','2of3']:
 759             a = self.new_account_address(account_type)
 760             if self.address_is_old(a):
 761                 print_error( "creating account", a )
 762                 self.create_account(account_type)
 763
 764
 765     def synchronize_account(self, account):
 766         new = []
 767         new += self.synchronize_sequence(account, 0)
 768         new += self.synchronize_sequence(account, 1)
 769         return new
 770
 771
 772     def synchronize(self):
 773         if self.master_public_keys:
 774             self.create_pending_accounts()
 775         new = []
 776         for account in self.accounts.values():
 777             new += self.synchronize_account(account)
 778         if new:
 779             self.save_accounts()
 780             self.storage.put('addr_history', self.history, True)
 781         return new
 782
 783
 784     def is_found(self):
 785         return self.history.values() != [[]] * len(self.history)
 786
 787
 788     def add_contact(self, address, label=None):
 789         self.addressbook.append(address)
 790         self.storage.put('contacts', self.addressbook, True)
 791         if label:
 792             self.set_label(address, label)
 793
 794
 795     def delete_contact(self, addr):
 796         if addr in self.addressbook:
 797             self.addressbook.remove(addr)
 798             self.storage.put('addressbook', self.addressbook, True)
 799
 800
 801     def fill_addressbook(self):
 802         for tx_hash, tx in self.transactions.items():
 803             is_relevant, is_send, _, _ = self.get_tx_value(tx)
 804             if is_send:
 805                 for addr, v in tx.outputs:
 806                     if not self.is_mine(addr) and addr not in self.addressbook:
 807                         self.addressbook.append(addr)
 808         # redo labels
 809         # self.update_tx_labels()
 810
 811     def get_num_tx(self, address):
 812         n = 0
 813         for tx in self.transactions.values():
 814             if address in map(lambda x:x[0], tx.outputs): n += 1
 815         return n
 816
 817
 818     def get_address_flags(self, addr):
 819         flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-"
 820         flags += "F" if addr in self.frozen_addresses else "P" if addr in self.prioritized_addresses else "-"
 821         return flags
 822
 823
 824     def get_tx_value(self, tx, account=None):
 825         domain = self.get_account_addresses(account)
 826         return tx.get_value(domain, self.prevout_values)
 827
 828
 829     def update_tx_outputs(self, tx_hash):
 830         tx = self.transactions.get(tx_hash)
 831
 832         for i, (addr, value) in enumerate(tx.outputs):
 833             key = tx_hash+ ':%d'%i
 834             self.prevout_values[key] = value
 835
 836         for item in tx.inputs:
 837             if self.is_mine(item.get('address')):
 838                 key = item['prevout_hash'] + ':%d'%item['prevout_n']
 839                 self.spent_outputs.append(key)
 840
 841
 842     def get_addr_balance(self, address):
 843         assert self.is_mine(address)
 844         h = self.history.get(address,[])
 845         if h == ['*']: return 0,0
 846         c = u = 0
 847         received_coins = []   # list of coins received at address
 848
 849         for tx_hash, tx_height in h:
 850             tx = self.transactions.get(tx_hash)
 851             if not tx: continue
 852
 853             for i, (addr, value) in enumerate(tx.outputs):
 854                 if addr == address:
 855                     key = tx_hash + ':%d'%i
 856                     received_coins.append(key)
 857
 858         for tx_hash, tx_height in h:
 859             tx = self.transactions.get(tx_hash)
 860             if not tx: continue
 861             v = 0
 862
 863             for item in tx.inputs:
 864                 addr = item.get('address')
 865                 if addr == address:
 866                     key = item['prevout_hash']  + ':%d'%item['prevout_n']
 867                     value = self.prevout_values.get( key )
 868                     if key in received_coins:
 869                         v -= value
 870
 871             for i, (addr, value) in enumerate(tx.outputs):
 872                 key = tx_hash + ':%d'%i
 873                 if addr == address:
 874                     v += value
 875
 876             if tx_height:
 877                 c += v
 878             else:
 879                 u += v
 880         return c, u
 881
 882
 883     def get_account_name(self, k):
 884         if k == 0:
 885             if self.seed_version == 4:
 886                 name = 'Main account'
 887             else:
 888                 name = 'Old account'
 889         else:
 890             name = self.labels.get(k, 'Unnamed account')
 891         return name
 892
 893     def get_account_names(self):
 894         accounts = {}
 895         for k, account in self.accounts.items():
 896             accounts[k] = self.get_account_name(k)
 897         if self.imported_keys:
 898             accounts[-1] = 'Imported keys'
 899         return accounts
 900
 901     def get_account_addresses(self, a, include_change=True):
 902         if a is None:
 903             o = self.addresses(True)
 904         elif a == -1:
 905             o = self.imported_keys.keys()
 906         else:
 907             ac = self.accounts[a]
 908             o = ac.get_addresses(0)
 909             if include_change: o += ac.get_addresses(1)
 910         return o
 911
 912     def get_imported_balance(self):
 913         cc = uu = 0
 914         for addr in self.imported_keys.keys():
 915             c, u = self.get_addr_balance(addr)
 916             cc += c
 917             uu += u
 918         return cc, uu
 919
 920     def get_account_balance(self, account):
 921         if account is None:
 922             return self.get_balance()
 923         elif account == -1:
 924             return self.get_imported_balance()
 925
 926         conf = unconf = 0
 927         for addr in self.get_account_addresses(account):
 928             c, u = self.get_addr_balance(addr)
 929             conf += c
 930             unconf += u
 931         return conf, unconf
 932
 933     def get_frozen_balance(self):
 934         conf = unconf = 0
 935         for addr in self.frozen_addresses:
 936             c, u = self.get_addr_balance(addr)
 937             conf += c
 938             unconf += u
 939         return conf, unconf
 940
 941
 942     def get_balance(self):
 943         cc = uu = 0
 944         for a in self.accounts.keys():
 945             c, u = self.get_account_balance(a)
 946             cc += c
 947             uu += u
 948         c, u = self.get_imported_balance()
 949         cc += c
 950         uu += u
 951         return cc, uu
 952
 953
 954     def get_unspent_coins(self, domain=None):
 955         coins = []
 956         if domain is None: domain = self.addresses(True)
 957         for addr in domain:
 958             h = self.history.get(addr, [])
 959             if h == ['*']: continue
 960             for tx_hash, tx_height in h:
 961                 tx = self.transactions.get(tx_hash)
 962                 if tx is None: raise BaseException("Wallet not synchronized")
 963                 for output in tx.d.get('outputs'):
 964                     if output.get('address') != addr: continue
 965                     key = tx_hash + ":%d" % output.get('index')
 966                     if key in self.spent_outputs: continue
 967                     output['tx_hash'] = tx_hash
 968                     output['height'] = tx_height
 969                     coins.append((tx_height, output))
 970
 971         # sort by age
 972         if coins:
 973             coins = sorted(coins)
 974             if coins[-1][0] != 0:
 975                 while coins[0][0] == 0:
 976                     coins = coins[1:] + [ coins[0] ]
 977         return [x[1] for x in coins]
 978
 979
 980
 981     def choose_tx_inputs( self, amount, fixed_fee, domain = None ):
 982         """ todo: minimize tx size """
 983         total = 0
 984         fee = self.fee if fixed_fee is None else fixed_fee
 985         if domain is None:
 986             domain = self.addresses()
 987
 988         for i in self.frozen_addresses:
 989             if i in domain: domain.remove(i)
 990
 991         prioritized = []
 992         for i in self.prioritized_addresses:
 993             if i in domain:
 994                 domain.remove(i)
 995                 prioritized.append(i)
 996
 997         coins = self.get_unspent_coins(domain)
 998         prioritized_coins = self.get_unspent_coins(prioritized)
 999
1000         inputs = []
1001         coins = prioritized_coins + coins
1002
1003         for item in coins:
1004             addr = item.get('address')
1005             v = item.get('value')
1006             total += v
1007             inputs.append( item )
1008             fee = self.estimated_fee(inputs) if fixed_fee is None else fixed_fee
1009             if total >= amount + fee: break
1010         else:
1011             inputs = []
1012
1013         return inputs, total, fee
1014
1015
1016     def set_fee(self, fee):
1017         if self.fee != fee:
1018             self.fee = fee
1019             self.storage.put('fee_per_kb', self.fee, True)
1020
1021     def estimated_fee(self, inputs):
1022         estimated_size =  len(inputs) * 180 + 80     # this assumes non-compressed keys
1023         fee = self.fee * int(round(estimated_size/1024.))
1024         if fee == 0: fee = self.fee
1025         return fee
1026
1027
1028     def add_tx_change( self, inputs, outputs, amount, fee, total, change_addr=None):
1029         "add change to a transaction"
1030         change_amount = total - ( amount + fee )
1031         if change_amount != 0:
1032             if not change_addr:
1033
1034                 # send change to one of the accounts involved in the tx
1035                 address = inputs[0].get('address')
1036                 account, _ = self.get_address_index(address)
1037
1038                 if not self.use_change or account == -1:
1039                     change_addr = inputs[-1]['address']
1040                 else:
1041                     change_addr = self.accounts[account].get_addresses(1)[-self.gap_limit_for_change]
1042
1043             # Insert the change output at a random position in the outputs
1044             posn = random.randint(0, len(outputs))
1045             outputs[posn:posn] = [( change_addr,  change_amount)]
1046         return outputs
1047
1048
1049     def get_history(self, address):
1050         with self.lock:
1051             return self.history.get(address)
1052
1053
1054     def get_status(self, h):
1055         if not h: return None
1056         if h == ['*']: return '*'
1057         status = ''
1058         for tx_hash, height in h:
1059             status += tx_hash + ':%d:' % height
1060         return hashlib.sha256( status ).digest().encode('hex')
1061
1062
1063     def receive_tx_callback(self, tx_hash, tx, tx_height):
1064
1065         with self.transaction_lock:
1066             self.add_extra_addresses(tx)
1067             if not self.check_new_tx(tx_hash, tx):
1068                 # may happen due to pruning
1069                 print_error("received transaction that is no longer referenced in history", tx_hash)
1070                 return
1071             self.transactions[tx_hash] = tx
1072             self.network.interface.pending_transactions_for_notifications.append(tx)
1073             self.save_transactions()
1074             if self.verifier and tx_height>0:
1075                 self.verifier.add(tx_hash, tx_height)
1076             self.update_tx_outputs(tx_hash)
1077
1078
1079     def save_transactions(self):
1080         tx = {}
1081         for k,v in self.transactions.items():
1082             tx[k] = str(v)
1083         self.storage.put('transactions', tx, True)
1084
1085     def receive_history_callback(self, addr, hist):
1086
1087         if not self.check_new_history(addr, hist):
1088             raise BaseException("error: received history for %s is not consistent with known transactions"%addr)
1089
1090         with self.lock:
1091             self.history[addr] = hist
1092             self.storage.put('addr_history', self.history, True)
1093
1094         if hist != ['*']:
1095             for tx_hash, tx_height in hist:
1096                 if tx_height>0:
1097                     # add it in case it was previously unconfirmed
1098                     if self.verifier: self.verifier.add(tx_hash, tx_height)
1099
1100
1101     def get_tx_history(self, account=None):
1102         with self.transaction_lock:
1103             history = self.transactions.items()
1104             history.sort(key = lambda x: self.verifier.get_txpos(x[0]))
1105             result = []
1106
1107             balance = 0
1108             for tx_hash, tx in history:
1109                 is_relevant, is_mine, v, fee = self.get_tx_value(tx, account)
1110                 if v is not None: balance += v
1111
1112             c, u = self.get_account_balance(account)
1113
1114             if balance != c+u:
1115                 result.append( ('', 1000, 0, c+u-balance, None, c+u-balance, None ) )
1116
1117             balance = c + u - balance
1118             for tx_hash, tx in history:
1119                 is_relevant, is_mine, value, fee = self.get_tx_value(tx, account)
1120                 if not is_relevant:
1121                     continue
1122                 if value is not None:
1123                     balance += value
1124
1125                 conf, timestamp = self.verifier.get_confirmations(tx_hash) if self.verifier else (None, None)
1126                 result.append( (tx_hash, conf, is_mine, value, fee, balance, timestamp) )
1127
1128         return result
1129
1130
1131     def get_label(self, tx_hash):
1132         label = self.labels.get(tx_hash)
1133         is_default = (label == '') or (label is None)
1134         if is_default: label = self.get_default_label(tx_hash)
1135         return label, is_default
1136
1137
1138     def get_default_label(self, tx_hash):
1139         tx = self.transactions.get(tx_hash)
1140         default_label = ''
1141         if tx:
1142             is_relevant, is_mine, _, _ = self.get_tx_value(tx)
1143             if is_mine:
1144                 for o in tx.outputs:
1145                     o_addr, _ = o
1146                     if not self.is_mine(o_addr):
1147                         try:
1148                             default_label = self.labels[o_addr]
1149                         except KeyError:
1150                             default_label = o_addr
1151                         break
1152                 else:
1153                     default_label = '(internal)'
1154             else:
1155                 for o in tx.outputs:
1156                     o_addr, _ = o
1157                     if self.is_mine(o_addr) and not self.is_change(o_addr):
1158                         break
1159                 else:
1160                     for o in tx.outputs:
1161                         o_addr, _ = o
1162                         if self.is_mine(o_addr):
1163                             break
1164                     else:
1165                         o_addr = None
1166
1167                 if o_addr:
1168                     dest_label = self.labels.get(o_addr)
1169                     try:
1170                         default_label = self.labels[o_addr]
1171                     except KeyError:
1172                         default_label = o_addr
1173
1174         return default_label
1175
1176
1177     def make_unsigned_transaction(self, outputs, fee=None, change_addr=None, domain=None ):
1178         for address, x in outputs:
1179             assert is_valid(address)
1180         amount = sum( map(lambda x:x[1], outputs) )
1181         inputs, total, fee = self.choose_tx_inputs( amount, fee, domain )
1182         if not inputs:
1183             raise ValueError("Not enough funds")
1184         outputs = self.add_tx_change(inputs, outputs, amount, fee, total, change_addr)
1185         return Transaction.from_io(inputs, outputs)
1186
1187
1188     def mktx_from_account(self, outputs, password, fee=None, change_addr=None, account=None):
1189         domain = self.get_account_addresses(account) if account else None
1190         return self.mktx(outputs, password, fee, change_addr, domain)
1191
1192
1193     def mktx(self, outputs, password, fee=None, change_addr=None, domain= None ):
1194         tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain)
1195         self.sign_transaction(tx, password)
1196         return tx
1197
1198
1199     def sign_transaction(self, tx, password):
1200         keypairs = {}
1201         for i, txin in enumerate(tx.inputs):
1202             address = txin['address']
1203             account, sequence = self.get_address_index(address)
1204             txin['KeyID'] = self.get_keyID(account, sequence)
1205             redeemScript = self.accounts[account].redeem_script(sequence)
1206             if redeemScript:
1207                 txin['redeemScript'] = redeemScript
1208             else:
1209                 txin['redeemPubkey'] = self.accounts[account].get_pubkey(*sequence)
1210             private_keys = self.get_private_key(address, password)
1211             for sec in private_keys:
1212                 pubkey = public_key_from_private_key(sec)
1213                 keypairs[ pubkey ] = sec
1214         tx.sign(keypairs)
1215
1216
1217     def sendtx(self, tx):
1218         # synchronous
1219         h = self.send_tx(tx)
1220         self.tx_event.wait()
1221         return self.receive_tx(h)
1222
1223     def send_tx(self, tx):
1224         # asynchronous
1225         self.tx_event.clear()
1226         self.network.interface.send([('blockchain.transaction.broadcast', [str(tx)])], self.on_broadcast)
1227         return tx.hash()
1228
1229     def on_broadcast(self, i, r):
1230         self.tx_result = r.get('result')
1231         self.tx_event.set()
1232
1233     def receive_tx(self,tx_hash):
1234         out = self.tx_result
1235         if out != tx_hash:
1236             return False, "error: " + out
1237         return True, out
1238
1239
1240
1241     def update_password(self, seed, old_password, new_password):
1242         if new_password == '': new_password = None
1243         # this will throw an exception if unicode cannot be converted
1244         self.seed = pw_encode( seed, new_password)
1245         self.storage.put('seed', self.seed, True)
1246         self.use_encryption = (new_password != None)
1247         self.storage.put('use_encryption', self.use_encryption,True)
1248         for k in self.imported_keys.keys():
1249             a = self.imported_keys[k]
1250             b = pw_decode(a, old_password)
1251             c = pw_encode(b, new_password)
1252             self.imported_keys[k] = c
1253         self.storage.put('imported_keys', self.imported_keys, True)
1254
1255         for k, v in self.master_private_keys.items():
1256             b = pw_decode(v, old_password)
1257             c = pw_encode(b, new_password)
1258             self.master_private_keys[k] = c
1259         self.storage.put('master_private_keys', self.master_private_keys, True)
1260
1261
1262     def freeze(self,addr):
1263         if self.is_mine(addr) and addr not in self.frozen_addresses:
1264             self.unprioritize(addr)
1265             self.frozen_addresses.append(addr)
1266             self.storage.put('frozen_addresses', self.frozen_addresses, True)
1267             return True
1268         else:
1269             return False
1270
1271     def unfreeze(self,addr):
1272         if self.is_mine(addr) and addr in self.frozen_addresses:
1273             self.frozen_addresses.remove(addr)
1274             self.storage.put('frozen_addresses', self.frozen_addresses, True)
1275             return True
1276         else:
1277             return False
1278
1279     def prioritize(self,addr):
1280         if self.is_mine(addr) and addr not in self.prioritized_addresses:
1281             self.unfreeze(addr)
1282             self.prioritized_addresses.append(addr)
1283             self.storage.put('prioritized_addresses', self.prioritized_addresses, True)
1284             return True
1285         else:
1286             return False
1287
1288     def unprioritize(self,addr):
1289         if self.is_mine(addr) and addr in self.prioritized_addresses:
1290             self.prioritized_addresses.remove(addr)
1291             self.storage.put('prioritized_addresses', self.prioritized_addresses, True)
1292             return True
1293         else:
1294             return False
1295
1296
1297     def set_verifier(self, verifier):
1298         self.verifier = verifier
1299
1300         # review transactions that are in the history
1301         for addr, hist in self.history.items():
1302             if hist == ['*']: continue
1303             for tx_hash, tx_height in hist:
1304                 if tx_height>0:
1305                     # add it in case it was previously unconfirmed
1306                     self.verifier.add(tx_hash, tx_height)
1307
1308
1309         # if we are on a pruning server, remove unverified transactions
1310         vr = self.verifier.transactions.keys() + self.verifier.verified_tx.keys()
1311         for tx_hash in self.transactions.keys():
1312             if tx_hash not in vr:
1313                 self.transactions.pop(tx_hash)
1314
1315
1316
1317     def check_new_history(self, addr, hist):
1318
1319         # check that all tx in hist are relevant
1320         if hist != ['*']:
1321             for tx_hash, height in hist:
1322                 tx = self.transactions.get(tx_hash)
1323                 if not tx: continue
1324                 if not tx.has_address(addr):
1325                     return False
1326
1327         # check that we are not "orphaning" a transaction
1328         old_hist = self.history.get(addr,[])
1329         if old_hist == ['*']: return True
1330
1331         for tx_hash, height in old_hist:
1332             if tx_hash in map(lambda x:x[0], hist): continue
1333             found = False
1334             for _addr, _hist in self.history.items():
1335                 if _addr == addr: continue
1336                 if _hist == ['*']: continue
1337                 _tx_hist = map(lambda x:x[0], _hist)
1338                 if tx_hash in _tx_hist:
1339                     found = True
1340                     break
1341
1342             if not found:
1343                 tx = self.transactions.get(tx_hash)
1344                 # tx might not be there
1345                 if not tx: continue
1346
1347                 # already verified?
1348                 if self.verifier.get_height(tx_hash):
1349                     continue
1350                 # unconfirmed tx
1351                 print_error("new history is orphaning transaction:", tx_hash)
1352                 # check that all outputs are not mine, request histories
1353                 ext_requests = []
1354                 for _addr, _v in tx.outputs:
1355                     # assert not self.is_mine(_addr)
1356                     ext_requests.append( ('blockchain.address.get_history', [_addr]) )
1357
1358                 ext_h = self.network.interface.synchronous_get(ext_requests)
1359                 print_error("sync:", ext_requests, ext_h)
1360                 height = None
1361                 for h in ext_h:
1362                     if h == ['*']: continue
1363                     for item in h:
1364                         if item.get('tx_hash') == tx_hash:
1365                             height = item.get('height')
1366                 if height:
1367                     print_error("found height for", tx_hash, height)
1368                     self.verifier.add(tx_hash, height)
1369                 else:
1370                     print_error("removing orphaned tx from history", tx_hash)
1371                     self.transactions.pop(tx_hash)
1372
1373         return True
1374
1375
1376
1377     def check_new_tx(self, tx_hash, tx):
1378         # 1 check that tx is referenced in addr_history.
1379         addresses = []
1380         for addr, hist in self.history.items():
1381             if hist == ['*']:continue
1382             for txh, height in hist:
1383                 if txh == tx_hash:
1384                     addresses.append(addr)
1385
1386         if not addresses:
1387             return False
1388
1389         # 2 check that referencing addresses are in the tx
1390         for addr in addresses:
1391             if not tx.has_address(addr):
1392                 return False
1393
1394         return True
1395
1396
1397     def start_threads(self, network):
1398         from verifier import TxVerifier
1399         self.network = network
1400         self.verifier = TxVerifier(self.network, self.storage)
1401         self.verifier.start()
1402         self.set_verifier(self.verifier)
1403         self.synchronizer = WalletSynchronizer(self)
1404         self.synchronizer.start()
1405
1406     def stop_threads(self):
1407         self.verifier.stop()
1408         self.synchronizer.stop()
1409
1410
1411
1412     def restore(self, callback):
1413         from i18n import _
1414         def wait_for_wallet():
1415             self.set_up_to_date(False)
1416             while not self.is_up_to_date():
1417                 msg = "%s\n%s %d\n%s %.1f"%(
1418                     _("Please wait..."),
1419                     _("Addresses generated:"),
1420                     len(self.addresses(True)),_("Kilobytes received:"),
1421                     self.network.interface.bytes_received/1024.)
1422
1423                 apply(callback, (msg,))
1424                 time.sleep(0.1)
1425
1426         def wait_for_network():
1427             while not self.network.interface.is_connected:
1428                 msg = "%s \n" % (_("Connecting..."))
1429                 apply(callback, (msg,))
1430                 time.sleep(0.1)
1431
1432         # wait until we are connected, because the user might have selected another server
1433         wait_for_network()
1434
1435         # try to restore old account
1436         self.create_old_account()
1437         wait_for_wallet()
1438
1439         if self.is_found():
1440             self.seed_version = 4
1441             self.storage.put('seed_version', wallet.seed_version, True)
1442         else:
1443             self.accounts.pop(0)
1444             self.create_accounts()
1445             wait_for_wallet()
1446
1447
1448
1449
1450 class WalletSynchronizer(threading.Thread):
1451
1452
1453     def __init__(self, wallet):
1454         threading.Thread.__init__(self)
1455         self.daemon = True
1456         self.wallet = wallet
1457         wallet.synchronizer = self
1458         self.network = self.wallet.network
1459         #self.wallet.network.register_callback('connected', lambda: self.wallet.set_up_to_date(False))
1460         self.was_updated = True
1461         self.running = False
1462         self.lock = threading.Lock()
1463         self.queue = Queue.Queue()
1464
1465     def stop(self):
1466         with self.lock: self.running = False
1467
1468     def is_running(self):
1469         with self.lock: return self.running
1470
1471
1472     def subscribe_to_addresses(self, addresses):
1473         messages = []
1474         for addr in addresses:
1475             messages.append(('blockchain.address.subscribe', [addr]))
1476         self.network.interface.send( messages, lambda i,r: self.queue.put(r))
1477
1478
1479     def run(self):
1480         with self.lock:
1481             self.running = True
1482
1483         while self.is_running():
1484             interface = self.network.interface
1485             if not interface.is_connected:
1486                 print_error("synchronizer: waiting for interface")
1487                 interface.connect_event.wait()
1488
1489             self.run_interface(interface)
1490
1491
1492     def run_interface(self, interface):
1493
1494         print_error("synchronizer: connected to", interface.server)
1495
1496         requested_tx = []
1497         missing_tx = []
1498         requested_histories = {}
1499
1500         # request any missing transactions
1501         for history in self.wallet.history.values():
1502             if history == ['*']: continue
1503             for tx_hash, tx_height in history:
1504                 if self.wallet.transactions.get(tx_hash) is None and (tx_hash, tx_height) not in missing_tx:
1505                     missing_tx.append( (tx_hash, tx_height) )
1506
1507         if missing_tx:
1508             print_error("missing tx", missing_tx)
1509
1510         # subscriptions
1511         self.subscribe_to_addresses(self.wallet.addresses(True, next=True))
1512
1513         while self.is_running():
1514             # 1. create new addresses
1515             new_addresses = self.wallet.synchronize()
1516
1517             # request missing addresses
1518             if new_addresses:
1519                 self.subscribe_to_addresses(new_addresses)
1520
1521             # request missing transactions
1522             for tx_hash, tx_height in missing_tx:
1523                 if (tx_hash, tx_height) not in requested_tx:
1524                     interface.send([ ('blockchain.transaction.get',[tx_hash, tx_height]) ], lambda i,r: self.queue.put(r))
1525                     requested_tx.append( (tx_hash, tx_height) )
1526             missing_tx = []
1527
1528             # detect if situation has changed
1529             if interface.is_up_to_date() and self.queue.empty():
1530                 if not self.wallet.is_up_to_date():
1531                     self.wallet.set_up_to_date(True)
1532                     self.was_updated = True
1533             else:
1534                 if self.wallet.is_up_to_date():
1535                     self.wallet.set_up_to_date(False)
1536                     self.was_updated = True
1537
1538             if self.was_updated:
1539                 self.wallet.network.trigger_callback('updated')
1540                 self.was_updated = False
1541
1542             # 2. get a response
1543             try:
1544                 r = self.queue.get(block=True, timeout=1)
1545             except Queue.Empty:
1546                 continue
1547
1548             if interface != self.network.interface:
1549                 break
1550
1551             if not r:
1552                 continue
1553
1554             # 3. handle response
1555             method = r['method']
1556             params = r['params']
1557             result = r.get('result')
1558             error = r.get('error')
1559             if error:
1560                 print "error", r
1561                 continue
1562
1563             if method == 'blockchain.address.subscribe':
1564                 addr = params[0]
1565                 if self.wallet.get_status(self.wallet.get_history(addr)) != result:
1566                     if requested_histories.get(addr) is None:
1567                         interface.send([('blockchain.address.get_history', [addr])], lambda i,r:self.queue.put(r))
1568                         requested_histories[addr] = result
1569
1570             elif method == 'blockchain.address.get_history':
1571                 addr = params[0]
1572                 print_error("receiving history", addr, result)
1573                 if result == ['*']:
1574                     assert requested_histories.pop(addr) == '*'
1575                     self.wallet.receive_history_callback(addr, result)
1576                 else:
1577                     hist = []
1578                     # check that txids are unique
1579                     txids = []
1580                     for item in result:
1581                         tx_hash = item['tx_hash']
1582                         if tx_hash not in txids:
1583                             txids.append(tx_hash)
1584                             hist.append( (tx_hash, item['height']) )
1585
1586                     if len(hist) != len(result):
1587                         raise BaseException("error: server sent history with non-unique txid", result)
1588
1589                     # check that the status corresponds to what was announced
1590                     rs = requested_histories.pop(addr)
1591                     if self.wallet.get_status(hist) != rs:
1592                         raise BaseException("error: status mismatch: %s"%addr)
1593
1594                     # store received history
1595                     self.wallet.receive_history_callback(addr, hist)
1596
1597                     # request transactions that we don't have
1598                     for tx_hash, tx_height in hist:
1599                         if self.wallet.transactions.get(tx_hash) is None:
1600                             if (tx_hash, tx_height) not in requested_tx and (tx_hash, tx_height) not in missing_tx:
1601                                 missing_tx.append( (tx_hash, tx_height) )
1602
1603             elif method == 'blockchain.transaction.get':
1604                 tx_hash = params[0]
1605                 tx_height = params[1]
1606                 assert tx_hash == hash_encode(Hash(result.decode('hex')))
1607                 tx = Transaction(result)
1608                 self.wallet.receive_tx_callback(tx_hash, tx, tx_height)
1609                 self.was_updated = True
1610                 requested_tx.remove( (tx_hash, tx_height) )
1611                 print_error("received tx:", tx_hash, len(tx.raw))
1612
1613             else:
1614                 print_error("Error: Unknown message:" + method + ", " + repr(params) + ", " + repr(result) )
1615
1616             if self.was_updated and not requested_tx:
1617                 self.wallet.network.trigger_callback('updated')
1618                 self.wallet.network.trigger_callback("new_transaction") # Updated gets called too many times from other places as well; if we use that signal we get the notification three times
1619
1620                 self.was_updated = False