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 os
  21 import hashlib
  22 import ast
  23 import threading
  24 import random
  25 import time
  26 import math
  27
  28 from util import print_msg, print_error
  29
  30 from bitcoin import *
  31 from account import *
  32 from version import *
  33
  34 from transaction import Transaction
  35 from plugins import run_hook
  36 import bitcoin
  37 from synchronizer import WalletSynchronizer
  38
  39 COINBASE_MATURITY = 100
  40 DUST_THRESHOLD = 5430
  41
  42 # internal ID for imported account
  43 IMPORTED_ACCOUNT = '/x'
  44
  45
  46 class WalletStorage(object):
  47
  48     def __init__(self, config):
  49         self.lock = threading.RLock()
  50         self.config = config
  51         self.data = {}
  52         self.file_exists = False
  53         self.path = self.init_path(config)
  54         print_error( "wallet path", self.path )
  55         if self.path:
  56             self.read(self.path)
  57
  58     def init_path(self, config):
  59         """Set the path of the wallet."""
  60
  61         # command line -w option
  62         path = config.get('wallet_path')
  63         if path:
  64             return path
  65
  66         # path in config file
  67         path = config.get('default_wallet_path')
  68         if path:
  69             return path
  70
  71         # default path
  72         dirpath = os.path.join(config.path, "wallets")
  73         if not os.path.exists(dirpath):
  74             os.mkdir(dirpath)
  75
  76         new_path = os.path.join(config.path, "wallets", "default_wallet")
  77
  78         # default path in pre 1.9 versions
  79         old_path = os.path.join(config.path, "electrum.dat")
  80         if os.path.exists(old_path) and not os.path.exists(new_path):
  81             os.rename(old_path, new_path)
  82
  83         return new_path
  84
  85     def read(self, path):
  86         """Read the contents of the wallet file."""
  87         try:
  88             with open(self.path, "r") as f:
  89                 data = f.read()
  90         except IOError:
  91             return
  92         try:
  93             d = ast.literal_eval( data )  #parse raw data from reading wallet file
  94         except Exception:
  95             raise IOError("Cannot read wallet file.")
  96
  97         self.data = d
  98         self.file_exists = True
  99
 100     def get(self, key, default=None):
 101
 102         with self.lock:
 103             v = self.data.get(key)
 104             if v is None:
 105                 v = default
 106             return v
 107
 108     def put(self, key, value, save = True):
 109
 110         with self.lock:
 111             if value is not None:
 112                 self.data[key] = value
 113             elif key in self.data:
 114                 self.data.pop(key)
 115             if save:
 116                 self.write()
 117
 118     def write(self):
 119         s = repr(self.data)
 120         f = open(self.path,"w")
 121         f.write( s )
 122         f.close()
 123         if 'ANDROID_DATA' not in os.environ:
 124             import stat
 125             os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE)
 126
 127
 128 class Abstract_Wallet(object):
 129     """
 130     Wallet classes are created to handle various address generation methods.
 131     Completion states (watching-only, single account, no seed, etc) are handled inside classes.
 132     """
 133     def __init__(self, storage):
 134         self.storage = storage
 135         self.electrum_version = ELECTRUM_VERSION
 136         self.gap_limit_for_change = 3 # constant
 137         # saved fields
 138         self.seed_version          = storage.get('seed_version', NEW_SEED_VERSION)
 139         self.gap_limit             = storage.get('gap_limit', 5)
 140         self.use_change            = storage.get('use_change',True)
 141         self.use_encryption        = storage.get('use_encryption', False)
 142         self.seed                  = storage.get('seed', '')               # encrypted
 143         self.labels                = storage.get('labels', {})
 144         self.frozen_addresses      = storage.get('frozen_addresses',[])
 145         self.addressbook           = storage.get('contacts', [])
 146
 147         self.history               = storage.get('addr_history',{})        # address -> list(txid, height)
 148
 149         self.fee                   = int(storage.get('fee_per_kb', 10000))
 150
 151         self.next_addresses = storage.get('next_addresses',{})
 152
 153         # This attribute is set when wallet.start_threads is called.
 154         self.synchronizer = None
 155
 156         self.load_accounts()
 157
 158         self.transactions = {}
 159         tx_list = self.storage.get('transactions',{})
 160         for k, raw in tx_list.items():
 161             try:
 162                 tx = Transaction.deserialize(raw)
 163             except Exception:
 164                 print_msg("Warning: Cannot deserialize transactions. skipping")
 165                 continue
 166
 167             self.add_pubkey_addresses(tx)
 168             self.transactions[k] = tx
 169
 170         for h,tx in self.transactions.items():
 171             if not self.check_new_tx(h, tx):
 172                 print_error("removing unreferenced tx", h)
 173                 self.transactions.pop(h)
 174
 175         # not saved
 176         self.prevout_values = {}     # my own transaction outputs
 177         self.spent_outputs = []
 178
 179         # spv
 180         self.verifier = None
 181
 182         # there is a difference between wallet.up_to_date and interface.is_up_to_date()
 183         # interface.is_up_to_date() returns true when all requests have been answered and processed
 184         # wallet.up_to_date is true when the wallet is synchronized (stronger requirement)
 185
 186         self.up_to_date = False
 187         self.lock = threading.Lock()
 188         self.transaction_lock = threading.Lock()
 189         self.tx_event = threading.Event()
 190         for tx_hash, tx in self.transactions.items():
 191             self.update_tx_outputs(tx_hash)
 192
 193     def add_pubkey_addresses(self, tx):
 194         # find the address corresponding to pay-to-pubkey inputs
 195         h = tx.hash()
 196
 197         # inputs
 198         tx.add_pubkey_addresses(self.transactions)
 199
 200         # outputs of tx: inputs of tx2
 201         for type, x, v in tx.outputs:
 202             if type == 'pubkey':
 203                 for tx2 in self.transactions.values():
 204                     tx2.add_pubkey_addresses({h:tx})
 205
 206     def get_action(self):
 207         pass
 208
 209     def convert_imported_keys(self, password):
 210         for k, v in self.imported_keys.items():
 211             sec = pw_decode(v, password)
 212             pubkey = public_key_from_private_key(sec)
 213             address = public_key_to_bc_address(pubkey.decode('hex'))
 214             assert address == k
 215             self.import_key(sec, password)
 216             self.imported_keys.pop(k)
 217         self.storage.put('imported_keys', self.imported_keys)
 218
 219     def load_accounts(self):
 220         self.accounts = {}
 221         self.imported_keys = self.storage.get('imported_keys',{})
 222
 223         d = self.storage.get('accounts', {})
 224         for k, v in d.items():
 225             if k == 0:
 226                 v['mpk'] = self.storage.get('master_public_key')
 227                 self.accounts[k] = OldAccount(v)
 228             elif v.get('imported'):
 229                 self.accounts[k] = ImportedAccount(v)
 230             elif v.get('xpub3'):
 231                 self.accounts[k] = BIP32_Account_2of3(v)
 232             elif v.get('xpub2'):
 233                 self.accounts[k] = BIP32_Account_2of2(v)
 234             elif v.get('xpub'):
 235                 self.accounts[k] = BIP32_Account(v)
 236             elif v.get('pending'):
 237                 self.accounts[k] = PendingAccount(v)
 238             else:
 239                 print_error("cannot load account", v)
 240
 241     def synchronize(self):
 242         pass
 243
 244     def can_create_accounts(self):
 245         return False
 246
 247     def set_up_to_date(self,b):
 248         with self.lock: self.up_to_date = b
 249
 250     def is_up_to_date(self):
 251         with self.lock: return self.up_to_date
 252
 253     def update(self):
 254         self.up_to_date = False
 255         while not self.is_up_to_date():
 256             time.sleep(0.1)
 257
 258     def is_imported(self, addr):
 259         account = self.accounts.get(IMPORTED_ACCOUNT)
 260         if account:
 261             return addr in account.get_addresses(0)
 262         else:
 263             return False
 264
 265     def has_imported_keys(self):
 266         account = self.accounts.get(IMPORTED_ACCOUNT)
 267         return account is not None
 268
 269     def import_key(self, sec, password):
 270         try:
 271             pubkey = public_key_from_private_key(sec)
 272             address = public_key_to_bc_address(pubkey.decode('hex'))
 273         except Exception:
 274             raise Exception('Invalid private key')
 275
 276         if self.is_mine(address):
 277             raise Exception('Address already in wallet')
 278
 279         if self.accounts.get(IMPORTED_ACCOUNT) is None:
 280             self.accounts[IMPORTED_ACCOUNT] = ImportedAccount({'imported':{}})
 281         self.accounts[IMPORTED_ACCOUNT].add(address, pubkey, sec, password)
 282         self.save_accounts()
 283
 284         if self.synchronizer:
 285             self.synchronizer.subscribe_to_addresses([address])
 286         return address
 287
 288     def delete_imported_key(self, addr):
 289         account = self.accounts[IMPORTED_ACCOUNT]
 290         account.remove(addr)
 291         if not account.get_addresses(0):
 292             self.accounts.pop(IMPORTED_ACCOUNT)
 293         self.save_accounts()
 294
 295     def set_label(self, name, text = None):
 296         changed = False
 297         old_text = self.labels.get(name)
 298         if text:
 299             if old_text != text:
 300                 self.labels[name] = text
 301                 changed = True
 302         else:
 303             if old_text:
 304                 self.labels.pop(name)
 305                 changed = True
 306
 307         if changed:
 308             self.storage.put('labels', self.labels, True)
 309
 310         run_hook('set_label', name, text, changed)
 311         return changed
 312
 313     def addresses(self, include_change = True, _next=True):
 314         o = []
 315         for a in self.accounts.keys():
 316             o += self.get_account_addresses(a, include_change)
 317
 318         if _next:
 319             for addr in self.next_addresses.values():
 320                 if addr not in o:
 321                     o += [addr]
 322         return o
 323
 324     def is_mine(self, address):
 325         return address in self.addresses(True)
 326
 327     def is_change(self, address):
 328         if not self.is_mine(address): return False
 329         acct, s = self.get_address_index(address)
 330         if s is None: return False
 331         return s[0] == 1
 332
 333     def get_address_index(self, address):
 334         for account in self.accounts.keys():
 335             for for_change in [0,1]:
 336                 addresses = self.accounts[account].get_addresses(for_change)
 337                 for addr in addresses:
 338                     if address == addr:
 339                         return account, (for_change, addresses.index(addr))
 340
 341         for k,v in self.next_addresses.items():
 342             if v == address:
 343                 return k, (0,0)
 344
 345         raise Exception("Address not found", address)
 346
 347     def get_private_key(self, address, password):
 348         if self.is_watching_only():
 349             return []
 350         account_id, sequence = self.get_address_index(address)
 351         return self.accounts[account_id].get_private_key(sequence, self, password)
 352
 353     def get_public_keys(self, address):
 354         account_id, sequence = self.get_address_index(address)
 355         return self.accounts[account_id].get_pubkeys(sequence)
 356
 357     def add_keypairs(self, tx, keypairs, password):
 358         # first check the provided password. This will raise if invalid.
 359         self.check_password(password)
 360
 361         addr_list, xpub_list = tx.inputs_to_sign()
 362         for addr in addr_list:
 363             if self.is_mine(addr):
 364                 private_keys = self.get_private_key(addr, password)
 365                 for sec in private_keys:
 366                     pubkey = public_key_from_private_key(sec)
 367                     keypairs[ pubkey ] = sec
 368
 369         for xpub, sequence in xpub_list:
 370             # look for account that can sign
 371             for k, account in self.accounts.items():
 372                 if xpub in account.get_master_pubkeys():
 373                     break
 374             else:
 375                 continue
 376             pk = account.get_private_key(sequence, self, password)
 377             for sec in pk:
 378                 pubkey = public_key_from_private_key(sec)
 379                 keypairs[pubkey] = sec
 380
 381     def signrawtransaction(self, tx, private_keys, password):
 382         # check that the password is correct. This will raise if it's not.
 383         self.get_seed(password)
 384
 385         # build a list of public/private keys
 386         keypairs = {}
 387
 388         # add private keys from parameter
 389         for sec in private_keys:
 390             pubkey = public_key_from_private_key(sec)
 391             keypairs[ pubkey ] = sec
 392
 393         # add private_keys
 394         self.add_keypairs(tx, keypairs, password)
 395
 396         # sign the transaction
 397         self.sign_transaction(tx, keypairs, password)
 398
 399     def sign_message(self, address, message, password):
 400         keys = self.get_private_key(address, password)
 401         assert len(keys) == 1
 402         sec = keys[0]
 403         key = regenerate_key(sec)
 404         compressed = is_compressed(sec)
 405         return key.sign_message(message, compressed, address)
 406
 407     def decrypt_message(self, pubkey, message, password):
 408         address = public_key_to_bc_address(pubkey.decode('hex'))
 409         keys = self.get_private_key(address, password)
 410         secret = keys[0]
 411         ec = regenerate_key(secret)
 412         decrypted = ec.decrypt_message(message)
 413         return decrypted
 414
 415     def is_found(self):
 416         return self.history.values() != [[]] * len(self.history)
 417
 418     def add_contact(self, address, label=None):
 419         self.addressbook.append(address)
 420         self.storage.put('contacts', self.addressbook, True)
 421         if label:
 422             self.set_label(address, label)
 423
 424     def delete_contact(self, addr):
 425         if addr in self.addressbook:
 426             self.addressbook.remove(addr)
 427             self.storage.put('addressbook', self.addressbook, True)
 428
 429     def fill_addressbook(self):
 430         for tx_hash, tx in self.transactions.items():
 431             is_relevant, is_send, _, _ = self.get_tx_value(tx)
 432             if is_send:
 433                 for addr in tx.get_output_addresses():
 434                     if not self.is_mine(addr) and addr not in self.addressbook:
 435                         self.addressbook.append(addr)
 436         # redo labels
 437         # self.update_tx_labels()
 438
 439     def get_num_tx(self, address):
 440         n = 0
 441         for tx in self.transactions.values():
 442             if address in tx.get_output_addresses(): n += 1
 443         return n
 444
 445     def get_address_flags(self, addr):
 446         flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-"
 447         flags += "F" if addr in self.frozen_addresses else "-"
 448         return flags
 449
 450     def get_tx_value(self, tx, account=None):
 451         domain = self.get_account_addresses(account)
 452         return tx.get_value(domain, self.prevout_values)
 453
 454     def update_tx_outputs(self, tx_hash):
 455         tx = self.transactions.get(tx_hash)
 456
 457         for i, (addr, value) in enumerate(tx.get_outputs()):
 458             key = tx_hash+ ':%d'%i
 459             self.prevout_values[key] = value
 460
 461         for item in tx.inputs:
 462             if self.is_mine(item.get('address')):
 463                 key = item['prevout_hash'] + ':%d'%item['prevout_n']
 464                 self.spent_outputs.append(key)
 465
 466     def get_addr_balance(self, address):
 467         #assert self.is_mine(address)
 468         h = self.history.get(address,[])
 469         if h == ['*']: return 0,0
 470         c = u = 0
 471         received_coins = []   # list of coins received at address
 472
 473         for tx_hash, tx_height in h:
 474             tx = self.transactions.get(tx_hash)
 475             if not tx: continue
 476
 477             for i, (addr, value) in enumerate(tx.get_outputs()):
 478                 if addr == address:
 479                     key = tx_hash + ':%d'%i
 480                     received_coins.append(key)
 481
 482         for tx_hash, tx_height in h:
 483             tx = self.transactions.get(tx_hash)
 484             if not tx: continue
 485             v = 0
 486
 487             for item in tx.inputs:
 488                 addr = item.get('address')
 489                 if addr == address:
 490                     key = item['prevout_hash']  + ':%d'%item['prevout_n']
 491                     value = self.prevout_values.get( key )
 492                     if key in received_coins:
 493                         v -= value
 494
 495             for i, (addr, value) in enumerate(tx.get_outputs()):
 496                 key = tx_hash + ':%d'%i
 497                 if addr == address:
 498                     v += value
 499
 500             if tx_height:
 501                 c += v
 502             else:
 503                 u += v
 504         return c, u
 505
 506     def get_account_name(self, k):
 507         return self.labels.get(k, self.accounts[k].get_name(k))
 508
 509     def get_account_names(self):
 510         account_names = {}
 511         for k in self.accounts.keys():
 512             account_names[k] = self.get_account_name(k)
 513         return account_names
 514
 515     def get_account_addresses(self, a, include_change=True):
 516         if a is None:
 517             o = self.addresses(include_change)
 518         elif a in self.accounts:
 519             ac = self.accounts[a]
 520             o = ac.get_addresses(0)
 521             if include_change: o += ac.get_addresses(1)
 522         return o
 523
 524     def get_account_balance(self, account):
 525         return self.get_balance(self.get_account_addresses(account))
 526
 527     def get_frozen_balance(self):
 528         return self.get_balance(self.frozen_addresses)
 529
 530     def get_balance(self, domain=None):
 531         if domain is None: domain = self.addresses(True)
 532         cc = uu = 0
 533         for addr in domain:
 534             c, u = self.get_addr_balance(addr)
 535             cc += c
 536             uu += u
 537         return cc, uu
 538
 539     def get_unspent_coins(self, domain=None):
 540         coins = []
 541         if domain is None: domain = self.addresses(True)
 542         for addr in domain:
 543             h = self.history.get(addr, [])
 544             if h == ['*']: continue
 545             for tx_hash, tx_height in h:
 546                 tx = self.transactions.get(tx_hash)
 547                 if tx is None: raise Exception("Wallet not synchronized")
 548                 is_coinbase = tx.inputs[0].get('prevout_hash') == '0'*64
 549                 for i, (address, value) in enumerate(tx.get_outputs()):
 550                     output = {'address':address, 'value':value, 'prevout_n':i}
 551                     if address != addr: continue
 552                     key = tx_hash + ":%d"%i
 553                     if key in self.spent_outputs: continue
 554                     output['prevout_hash'] = tx_hash
 555                     output['height'] = tx_height
 556                     output['coinbase'] = is_coinbase
 557                     coins.append((tx_height, output))
 558
 559         # sort by age
 560         if coins:
 561             coins = sorted(coins)
 562             if coins[-1][0] != 0:
 563                 while coins[0][0] == 0:
 564                     coins = coins[1:] + [ coins[0] ]
 565         return [x[1] for x in coins]
 566
 567     def choose_tx_inputs( self, amount, fixed_fee, num_outputs, domain = None, coins = None ):
 568         """ todo: minimize tx size """
 569         total = 0
 570         fee = self.fee if fixed_fee is None else fixed_fee
 571
 572         if not coins:
 573             if domain is None:
 574                 domain = self.addresses(True)
 575             for i in self.frozen_addresses:
 576                 if i in domain: domain.remove(i)
 577             coins = self.get_unspent_coins(domain)
 578
 579         inputs = []
 580
 581         for item in coins:
 582             if item.get('coinbase') and item.get('height') + COINBASE_MATURITY > self.network.get_local_height():
 583                 continue
 584             v = item.get('value')
 585             total += v
 586             inputs.append(item)
 587             fee = self.estimated_fee(inputs, num_outputs) if fixed_fee is None else fixed_fee
 588             if total >= amount + fee: break
 589         else:
 590             inputs = []
 591
 592         return inputs, total, fee
 593
 594     def set_fee(self, fee):
 595         if self.fee != fee:
 596             self.fee = fee
 597             self.storage.put('fee_per_kb', self.fee, True)
 598
 599     def estimated_fee(self, inputs, num_outputs):
 600         estimated_size =  len(inputs) * 180 + num_outputs * 34    # this assumes non-compressed keys
 601         fee = self.fee * int(math.ceil(estimated_size/1000.))
 602         return fee
 603
 604     def add_tx_change( self, inputs, outputs, amount, fee, total, change_addr=None):
 605         "add change to a transaction"
 606         change_amount = total - ( amount + fee )
 607         if change_amount > DUST_THRESHOLD:
 608             if not change_addr:
 609
 610                 # send change to one of the accounts involved in the tx
 611                 address = inputs[0].get('address')
 612                 account, _ = self.get_address_index(address)
 613
 614                 if not self.use_change or account == IMPORTED_ACCOUNT:
 615                     change_addr = inputs[-1]['address']
 616                 else:
 617                     change_addr = self.accounts[account].get_addresses(1)[-self.gap_limit_for_change]
 618
 619             # Insert the change output at a random position in the outputs
 620             posn = random.randint(0, len(outputs))
 621             outputs[posn:posn] = [( 'address', change_addr,  change_amount)]
 622         return outputs
 623
 624     def get_history(self, address):
 625         with self.lock:
 626             return self.history.get(address)
 627
 628     def get_status(self, h):
 629         if not h: return None
 630         if h == ['*']: return '*'
 631         status = ''
 632         for tx_hash, height in h:
 633             status += tx_hash + ':%d:' % height
 634         return hashlib.sha256( status ).digest().encode('hex')
 635
 636     def receive_tx_callback(self, tx_hash, tx, tx_height):
 637
 638         with self.transaction_lock:
 639             self.add_pubkey_addresses(tx)
 640             if not self.check_new_tx(tx_hash, tx):
 641                 # may happen due to pruning
 642                 print_error("received transaction that is no longer referenced in history", tx_hash)
 643                 return
 644             self.transactions[tx_hash] = tx
 645             self.network.pending_transactions_for_notifications.append(tx)
 646             self.save_transactions()
 647             if self.verifier and tx_height>0:
 648                 self.verifier.add(tx_hash, tx_height)
 649             self.update_tx_outputs(tx_hash)
 650
 651     def save_transactions(self):
 652         tx = {}
 653         for k,v in self.transactions.items():
 654             tx[k] = str(v)
 655         self.storage.put('transactions', tx, True)
 656
 657     def receive_history_callback(self, addr, hist):
 658
 659         if not self.check_new_history(addr, hist):
 660             raise Exception("error: received history for %s is not consistent with known transactions"%addr)
 661
 662         with self.lock:
 663             self.history[addr] = hist
 664             self.storage.put('addr_history', self.history, True)
 665
 666         if hist != ['*']:
 667             for tx_hash, tx_height in hist:
 668                 if tx_height>0:
 669                     # add it in case it was previously unconfirmed
 670                     if self.verifier: self.verifier.add(tx_hash, tx_height)
 671
 672     def get_tx_history(self, account=None):
 673         if not self.verifier:
 674             return []
 675
 676         with self.transaction_lock:
 677             history = self.transactions.items()
 678             history.sort(key = lambda x: self.verifier.get_txpos(x[0]))
 679             result = []
 680
 681             balance = 0
 682             for tx_hash, tx in history:
 683                 is_relevant, is_mine, v, fee = self.get_tx_value(tx, account)
 684                 if v is not None: balance += v
 685
 686             c, u = self.get_account_balance(account)
 687
 688             if balance != c+u:
 689                 result.append( ('', 1000, 0, c+u-balance, None, c+u-balance, None ) )
 690
 691             balance = c + u - balance
 692             for tx_hash, tx in history:
 693                 is_relevant, is_mine, value, fee = self.get_tx_value(tx, account)
 694                 if not is_relevant:
 695                     continue
 696                 if value is not None:
 697                     balance += value
 698
 699                 conf, timestamp = self.verifier.get_confirmations(tx_hash) if self.verifier else (None, None)
 700                 result.append( (tx_hash, conf, is_mine, value, fee, balance, timestamp) )
 701
 702         return result
 703
 704     def get_label(self, tx_hash):
 705         label = self.labels.get(tx_hash)
 706         is_default = (label == '') or (label is None)
 707         if is_default: label = self.get_default_label(tx_hash)
 708         return label, is_default
 709
 710     def get_default_label(self, tx_hash):
 711         tx = self.transactions.get(tx_hash)
 712         default_label = ''
 713         if tx:
 714             is_relevant, is_mine, _, _ = self.get_tx_value(tx)
 715             if is_mine:
 716                 for o_addr in tx.get_output_addresses():
 717                     if not self.is_mine(o_addr):
 718                         try:
 719                             default_label = self.labels[o_addr]
 720                         except KeyError:
 721                             default_label = '>' + o_addr
 722                         break
 723                 else:
 724                     default_label = '(internal)'
 725             else:
 726                 for o_addr in tx.get_output_addresses():
 727                     if self.is_mine(o_addr) and not self.is_change(o_addr):
 728                         break
 729                 else:
 730                     for o_addr in tx.get_output_addresses():
 731                         if self.is_mine(o_addr):
 732                             break
 733                     else:
 734                         o_addr = None
 735
 736                 if o_addr:
 737                     try:
 738                         default_label = self.labels[o_addr]
 739                     except KeyError:
 740                         default_label = '<' + o_addr
 741
 742         return default_label
 743
 744     def make_unsigned_transaction(self, outputs, fee=None, change_addr=None, domain=None, coins=None ):
 745         for type, address, x in outputs:
 746             if type == 'op_return':
 747                 continue
 748             if type == 'address':
 749                 assert is_address(address), "Address " + address + " is invalid!"
 750         amount = sum( map(lambda x:x[2], outputs) )
 751         inputs, total, fee = self.choose_tx_inputs( amount, fee, len(outputs), domain, coins )
 752         if not inputs:
 753             raise ValueError("Not enough funds")
 754         for txin in inputs:
 755             self.add_input_info(txin)
 756         outputs = self.add_tx_change(inputs, outputs, amount, fee, total, change_addr)
 757         return Transaction(inputs, outputs)
 758
 759     def mktx(self, outputs, password, fee=None, change_addr=None, domain= None, coins = None ):
 760         tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain, coins)
 761         keypairs = {}
 762         self.add_keypairs(tx, keypairs, password)
 763         if keypairs:
 764             self.sign_transaction(tx, keypairs, password)
 765         return tx
 766
 767     def add_input_info(self, txin):
 768         address = txin['address']
 769         account_id, sequence = self.get_address_index(address)
 770         account = self.accounts[account_id]
 771         redeemScript = account.redeem_script(*sequence)
 772         pubkeys = account.get_pubkeys(*sequence)
 773         x_pubkeys = account.get_xpubkeys(*sequence)
 774         # sort pubkeys and x_pubkeys, using the order of pubkeys
 775         pubkeys, x_pubkeys = zip( *sorted(zip(pubkeys, x_pubkeys)))
 776         txin['pubkeys'] = list(pubkeys)
 777         txin['x_pubkeys'] = list(x_pubkeys)
 778         txin['signatures'] = [None] * len(pubkeys)
 779
 780         if redeemScript:
 781             txin['redeemScript'] = redeemScript
 782             txin['num_sig'] = 2
 783         else:
 784             txin['redeemPubkey'] = account.get_pubkey(*sequence)
 785             txin['num_sig'] = 1
 786
 787     def sign_transaction(self, tx, keypairs, password):
 788         tx.sign(keypairs)
 789         run_hook('sign_transaction', tx, password)
 790
 791     def sendtx(self, tx):
 792         # synchronous
 793         h = self.send_tx(tx)
 794         self.tx_event.wait()
 795         return self.receive_tx(h, tx)
 796
 797     def send_tx(self, tx):
 798         # asynchronous
 799         self.tx_event.clear()
 800         self.network.send([('blockchain.transaction.broadcast', [str(tx)])], self.on_broadcast)
 801         return tx.hash()
 802
 803     def on_broadcast(self, i, r):
 804         self.tx_result = r.get('result')
 805         self.tx_event.set()
 806
 807     def receive_tx(self, tx_hash, tx):
 808         out = self.tx_result
 809         if out != tx_hash:
 810             return False, "error: " + out
 811         run_hook('receive_tx', tx, self)
 812         return True, out
 813
 814     def update_password(self, old_password, new_password):
 815         if new_password == '':
 816             new_password = None
 817
 818         if self.has_seed():
 819             decoded = self.get_seed(old_password)
 820             self.seed = pw_encode( decoded, new_password)
 821             self.storage.put('seed', self.seed, True)
 822
 823         imported_account = self.accounts.get(IMPORTED_ACCOUNT)
 824         if imported_account:
 825             imported_account.update_password(old_password, new_password)
 826             self.save_accounts()
 827
 828         for k, v in self.master_private_keys.items():
 829             b = pw_decode(v, old_password)
 830             c = pw_encode(b, new_password)
 831             self.master_private_keys[k] = c
 832         self.storage.put('master_private_keys', self.master_private_keys, True)
 833
 834         self.use_encryption = (new_password != None)
 835         self.storage.put('use_encryption', self.use_encryption,True)
 836
 837     def freeze(self,addr):
 838         if self.is_mine(addr) and addr not in self.frozen_addresses:
 839             self.frozen_addresses.append(addr)
 840             self.storage.put('frozen_addresses', self.frozen_addresses, True)
 841             return True
 842         else:
 843             return False
 844
 845     def unfreeze(self,addr):
 846         if self.is_mine(addr) and addr in self.frozen_addresses:
 847             self.frozen_addresses.remove(addr)
 848             self.storage.put('frozen_addresses', self.frozen_addresses, True)
 849             return True
 850         else:
 851             return False
 852
 853     def set_verifier(self, verifier):
 854         self.verifier = verifier
 855
 856         # review transactions that are in the history
 857         for addr, hist in self.history.items():
 858             if hist == ['*']: continue
 859             for tx_hash, tx_height in hist:
 860                 if tx_height>0:
 861                     # add it in case it was previously unconfirmed
 862                     self.verifier.add(tx_hash, tx_height)
 863
 864         # if we are on a pruning server, remove unverified transactions
 865         vr = self.verifier.transactions.keys() + self.verifier.verified_tx.keys()
 866         for tx_hash in self.transactions.keys():
 867             if tx_hash not in vr:
 868                 self.transactions.pop(tx_hash)
 869
 870     def check_new_history(self, addr, hist):
 871         # check that all tx in hist are relevant
 872         if hist != ['*']:
 873             for tx_hash, height in hist:
 874                 tx = self.transactions.get(tx_hash)
 875                 if not tx: continue
 876                 if not tx.has_address(addr):
 877                     return False
 878
 879         # check that we are not "orphaning" a transaction
 880         old_hist = self.history.get(addr,[])
 881         if old_hist == ['*']: return True
 882
 883         for tx_hash, height in old_hist:
 884             if tx_hash in map(lambda x:x[0], hist): continue
 885             found = False
 886             for _addr, _hist in self.history.items():
 887                 if _addr == addr: continue
 888                 if _hist == ['*']: continue
 889                 _tx_hist = map(lambda x:x[0], _hist)
 890                 if tx_hash in _tx_hist:
 891                     found = True
 892                     break
 893
 894             if not found:
 895                 tx = self.transactions.get(tx_hash)
 896                 # tx might not be there
 897                 if not tx: continue
 898
 899                 # already verified?
 900                 if self.verifier.get_height(tx_hash):
 901                     continue
 902                 # unconfirmed tx
 903                 print_error("new history is orphaning transaction:", tx_hash)
 904                 # check that all outputs are not mine, request histories
 905                 ext_requests = []
 906                 for _addr in tx.get_output_addresses():
 907                     # assert not self.is_mine(_addr)
 908                     ext_requests.append( ('blockchain.address.get_history', [_addr]) )
 909
 910                 ext_h = self.network.synchronous_get(ext_requests)
 911                 print_error("sync:", ext_requests, ext_h)
 912                 height = None
 913                 for h in ext_h:
 914                     if h == ['*']: continue
 915                     for item in h:
 916                         if item.get('tx_hash') == tx_hash:
 917                             height = item.get('height')
 918                 if height:
 919                     print_error("found height for", tx_hash, height)
 920                     self.verifier.add(tx_hash, height)
 921                 else:
 922                     print_error("removing orphaned tx from history", tx_hash)
 923                     self.transactions.pop(tx_hash)
 924
 925         return True
 926
 927     def check_new_tx(self, tx_hash, tx):
 928         # 1 check that tx is referenced in addr_history.
 929         addresses = []
 930         for addr, hist in self.history.items():
 931             if hist == ['*']:continue
 932             for txh, height in hist:
 933                 if txh == tx_hash:
 934                     addresses.append(addr)
 935
 936         if not addresses:
 937             return False
 938
 939         # 2 check that referencing addresses are in the tx
 940         for addr in addresses:
 941             if not tx.has_address(addr):
 942                 return False
 943
 944         return True
 945
 946     def start_threads(self, network):
 947         from verifier import TxVerifier
 948         self.network = network
 949         if self.network is not None:
 950             self.verifier = TxVerifier(self.network, self.storage)
 951             self.verifier.start()
 952             self.set_verifier(self.verifier)
 953             self.synchronizer = WalletSynchronizer(self, network)
 954             self.synchronizer.start()
 955         else:
 956             self.verifier = None
 957             self.synchronizer =None
 958
 959     def stop_threads(self):
 960         if self.network:
 961             self.verifier.stop()
 962             self.synchronizer.stop()
 963
 964     def restore(self, cb):
 965         pass
 966
 967     def get_accounts(self):
 968         return self.accounts
 969
 970     def save_accounts(self):
 971         d = {}
 972         for k, v in self.accounts.items():
 973             d[k] = v.dump()
 974         self.storage.put('accounts', d, True)
 975
 976     def can_import(self):
 977         return not self.is_watching_only()
 978
 979     def is_used(self, address):
 980         h = self.history.get(address,[])
 981         c, u = self.get_addr_balance(address)
 982         return len(h), len(h) > 0 and c == -u
 983
 984     def address_is_old(self, address, age_limit=2):
 985         age = -1
 986         h = self.history.get(address, [])
 987         if h == ['*']:
 988             return True
 989         for tx_hash, tx_height in h:
 990             if tx_height == 0:
 991                 tx_age = 0
 992             else:
 993                 tx_age = self.network.get_local_height() - tx_height + 1
 994             if tx_age > age:
 995                 age = tx_age
 996         return age > age_limit
 997
 998
 999 class Imported_Wallet(Abstract_Wallet):
1000
1001     def __init__(self, storage):
1002         Abstract_Wallet.__init__(self, storage)
1003         a = self.accounts.get(IMPORTED_ACCOUNT)
1004         if not a:
1005             self.accounts[IMPORTED_ACCOUNT] = ImportedAccount({'imported':{}})
1006         self.storage.put('wallet_type', 'imported', True)
1007
1008     def is_watching_only(self):
1009         acc = self.accounts[IMPORTED_ACCOUNT]
1010         n = acc.keypairs.values()
1011         return n == [(None, None)] * len(n)
1012
1013     def has_seed(self):
1014         return False
1015
1016     def is_deterministic(self):
1017         return False
1018
1019     def check_password(self, password):
1020         self.accounts[IMPORTED_ACCOUNT].get_private_key((0,0), self, password)
1021
1022     def is_used(self, address):
1023         h = self.history.get(address,[])
1024         return len(h), False
1025
1026     def get_master_public_keys(self):
1027         return {}
1028
1029     def is_beyond_limit(self, address, account, is_change):
1030         return False
1031
1032
1033 class Deterministic_Wallet(Abstract_Wallet):
1034
1035     def __init__(self, storage):
1036         Abstract_Wallet.__init__(self, storage)
1037
1038     def has_seed(self):
1039         return self.seed != ''
1040
1041     def is_deterministic(self):
1042         return True
1043
1044     def is_watching_only(self):
1045         return not self.has_seed()
1046
1047     def add_seed(self, seed, password):
1048         if self.seed:
1049             raise Exception("a seed exists")
1050
1051         self.seed_version, self.seed = self.prepare_seed(seed)
1052         if password:
1053             self.seed = pw_encode( self.seed, password)
1054             self.use_encryption = True
1055         else:
1056             self.use_encryption = False
1057
1058         self.storage.put('seed', self.seed, True)
1059         self.storage.put('seed_version', self.seed_version, True)
1060         self.storage.put('use_encryption', self.use_encryption,True)
1061         self.create_master_keys(password)
1062
1063     def get_seed(self, password):
1064         return pw_decode(self.seed, password)
1065
1066     def get_mnemonic(self, password):
1067         return self.get_seed(password)
1068
1069     def change_gap_limit(self, value):
1070         if value >= self.gap_limit:
1071             self.gap_limit = value
1072             self.storage.put('gap_limit', self.gap_limit, True)
1073             #self.interface.poke('synchronizer')
1074             return True
1075
1076         elif value >= self.min_acceptable_gap():
1077             for key, account in self.accounts.items():
1078                 addresses = account[0]
1079                 k = self.num_unused_trailing_addresses(addresses)
1080                 n = len(addresses) - k + value
1081                 addresses = addresses[0:n]
1082                 self.accounts[key][0] = addresses
1083
1084             self.gap_limit = value
1085             self.storage.put('gap_limit', self.gap_limit, True)
1086             self.save_accounts()
1087             return True
1088         else:
1089             return False
1090
1091     def num_unused_trailing_addresses(self, addresses):
1092         k = 0
1093         for a in addresses[::-1]:
1094             if self.history.get(a):break
1095             k = k + 1
1096         return k
1097
1098     def min_acceptable_gap(self):
1099         # fixme: this assumes wallet is synchronized
1100         n = 0
1101         nmax = 0
1102
1103         for account in self.accounts.values():
1104             addresses = account.get_addresses(0)
1105             k = self.num_unused_trailing_addresses(addresses)
1106             for a in addresses[0:-k]:
1107                 if self.history.get(a):
1108                     n = 0
1109                 else:
1110                     n += 1
1111                     if n > nmax: nmax = n
1112         return nmax + 1
1113
1114     def create_new_address(self, account=None, for_change=0):
1115         if account is None:
1116             account = self.default_account()
1117         address = account.create_new_address(for_change)
1118         self.history[address] = []
1119         if self.synchronizer:
1120             self.synchronizer.add(address)
1121         self.save_accounts()
1122         return address
1123
1124     def synchronize_sequence(self, account, for_change):
1125         limit = self.gap_limit_for_change if for_change else self.gap_limit
1126         while True:
1127             addresses = account.get_addresses(for_change)
1128             if len(addresses) < limit:
1129                 self.create_new_address(account, for_change)
1130                 continue
1131             if map( lambda a: self.address_is_old(a), addresses[-limit:] ) == limit*[False]:
1132                 break
1133             else:
1134                 self.create_new_address(account, for_change)
1135
1136     def check_pending_accounts(self):
1137         for account_id, addr in self.next_addresses.items():
1138             if self.address_is_old(addr):
1139                 print_error( "creating account", account_id )
1140                 xpub = self.master_public_keys[account_id]
1141                 account = BIP32_Account({'xpub':xpub})
1142                 self.add_account(account_id, account)
1143                 self.next_addresses.pop(account_id)
1144
1145     def synchronize_account(self, account):
1146         self.synchronize_sequence(account, 0)
1147         self.synchronize_sequence(account, 1)
1148
1149     def synchronize(self):
1150         self.check_pending_accounts()
1151         for account in self.accounts.values():
1152             if type(account) in [ImportedAccount, PendingAccount]:
1153                 continue
1154             self.synchronize_account(account)
1155
1156     def restore(self, callback):
1157         from i18n import _
1158         def wait_for_wallet():
1159             self.set_up_to_date(False)
1160             while not self.is_up_to_date():
1161                 msg = "%s\n%s %d\n%s %.1f"%(
1162                     _("Please wait..."),
1163                     _("Addresses generated:"),
1164                     len(self.addresses(True)),
1165                     _("Kilobytes received:"),
1166                     self.network.interface.bytes_received/1024.)
1167
1168                 apply(callback, (msg,))
1169                 time.sleep(0.1)
1170
1171         def wait_for_network():
1172             while not self.network.is_connected():
1173                 msg = "%s \n" % (_("Connecting..."))
1174                 apply(callback, (msg,))
1175                 time.sleep(0.1)
1176
1177         # wait until we are connected, because the user might have selected another server
1178         if self.network:
1179             wait_for_network()
1180             wait_for_wallet()
1181         else:
1182             self.synchronize()
1183         self.fill_addressbook()
1184
1185     def create_account(self, name, password):
1186         i = self.num_accounts()
1187         account_id = self.account_id(i)
1188         account = self.make_account(account_id, password)
1189         self.add_account(account_id, account)
1190         if name:
1191             self.set_label(account_id, name)
1192
1193         # add address of the next account
1194         _, _ = self.next_account_address(password)
1195
1196
1197     def add_account(self, account_id, account):
1198         self.accounts[account_id] = account
1199         self.save_accounts()
1200
1201     def account_is_pending(self, k):
1202         return type(self.accounts.get(k)) == PendingAccount
1203
1204     def delete_pending_account(self, k):
1205         assert self.account_is_pending(k)
1206         self.accounts.pop(k)
1207         self.save_accounts()
1208
1209     def create_pending_account(self, name, password):
1210         account_id, addr = self.next_account_address(password)
1211         self.set_label(account_id, name)
1212         self.accounts[account_id] = PendingAccount({'pending':addr})
1213         self.save_accounts()
1214
1215     def is_beyond_limit(self, address, account, is_change):
1216         if type(account) == ImportedAccount:
1217             return False
1218         addr_list = account.get_addresses(is_change)
1219         i = addr_list.index(address)
1220         prev_addresses = addr_list[:max(0, i)]
1221         limit = self.gap_limit_for_change if is_change else self.gap_limit
1222         if len(prev_addresses) < limit:
1223             return False
1224         prev_addresses = prev_addresses[max(0, i - limit):]
1225         for addr in prev_addresses:
1226             if self.history.get(addr):
1227                 return False
1228         return True
1229
1230     def get_action(self):
1231         if not self.get_master_public_key():
1232             return 'create_seed'
1233         if not self.accounts:
1234             return 'create_accounts'
1235
1236
1237 class NewWallet(Deterministic_Wallet):
1238
1239     def __init__(self, storage):
1240         Deterministic_Wallet.__init__(self, storage)
1241         self.master_public_keys  = storage.get('master_public_keys', {})
1242         self.master_private_keys = storage.get('master_private_keys', {})
1243
1244     def default_account(self):
1245         return self.accounts["m/0'"]
1246
1247     def is_watching_only(self):
1248         return not bool(self.master_private_keys)
1249
1250     def can_create_accounts(self):
1251         return 'm/' in self.master_private_keys.keys()
1252
1253     def get_master_public_key(self):
1254         """xpub of the main account"""
1255         return self.master_public_keys.get("m/0'")
1256
1257     def get_master_public_keys(self):
1258         out = {}
1259         for k, account in self.accounts.items():
1260             name = self.get_account_name(k)
1261             mpk_text = '\n\n'.join( account.get_master_pubkeys() )
1262             out[name] = mpk_text
1263         return out
1264
1265     def get_master_private_key(self, account, password):
1266         k = self.master_private_keys.get(account)
1267         if not k: return
1268         xpriv = pw_decode( k, password)
1269         return xpriv
1270
1271     def check_password(self, password):
1272         xpriv = self.get_master_private_key( "m/", password )
1273         xpub = self.master_public_keys["m/"]
1274         assert deserialize_xkey(xpriv)[3] == deserialize_xkey(xpub)[3]
1275
1276     def create_xprv_wallet(self, xprv, password):
1277         xpub = bitcoin.xpub_from_xprv(xprv)
1278         account = BIP32_Account({'xpub':xpub})
1279         account_id = 'm/' + bitcoin.get_xkey_name(xpub)
1280         self.storage.put('seed_version', self.seed_version, True)
1281         self.add_master_private_key(account_id, xprv, password)
1282         self.add_master_public_key(account_id, xpub)
1283         self.add_account(account_id, account)
1284
1285     def create_watching_only_wallet(self, xpub):
1286         account = BIP32_Account({'xpub':xpub})
1287         account_id = 'm/' + bitcoin.get_xkey_name(xpub)
1288         self.storage.put('seed_version', self.seed_version, True)
1289         self.add_master_public_key(account_id, xpub)
1290         self.add_account(account_id, account)
1291
1292     def create_accounts(self, password):
1293         # First check the password is valid (this raises if it isn't).
1294         if not self.is_watching_only():
1295             self.check_password(password)
1296         self.create_account('Main account', password)
1297
1298     def add_master_public_key(self, name, xpub):
1299         self.master_public_keys[name] = xpub
1300         self.storage.put('master_public_keys', self.master_public_keys, True)
1301
1302     def add_master_private_key(self, name, xpriv, password):
1303         self.master_private_keys[name] = pw_encode(xpriv, password)
1304         self.storage.put('master_private_keys', self.master_private_keys, True)
1305
1306     def add_master_keys(self, root, account_id, password):
1307         x = self.master_private_keys.get(root)
1308         if x:
1309             master_xpriv = pw_decode(x, password )
1310             xpriv, xpub = bip32_private_derivation(master_xpriv, root, account_id)
1311             self.add_master_public_key(account_id, xpub)
1312             self.add_master_private_key(account_id, xpriv, password)
1313         else:
1314             master_xpub = self.master_public_keys[root]
1315             xpub = bip32_public_derivation(master_xpub, root, account_id)
1316             self.add_master_public_key(account_id, xpub)
1317         return xpub
1318
1319     def create_master_keys(self, password):
1320         xpriv, xpub = bip32_root(mnemonic_to_seed(self.get_seed(password),'').encode('hex'))
1321         self.add_master_public_key("m/", xpub)
1322         self.add_master_private_key("m/", xpriv, password)
1323
1324     def can_sign(self, tx):
1325         if self.is_watching_only():
1326             return False
1327         if tx.is_complete():
1328             return False
1329         addr_list, xpub_list = tx.inputs_to_sign()
1330         for addr in addr_list:
1331             if self.is_mine(addr):
1332                 return True
1333         mpk = [ self.master_public_keys[k] for k in self.master_private_keys.keys() ]
1334         for xpub, sequence in xpub_list:
1335             if xpub in mpk:
1336                 return True
1337         return False
1338
1339     def find_root_by_master_key(self, xpub):
1340         for key, xpub2 in self.master_public_keys.items():
1341             if key == "m/":continue
1342             if xpub == xpub2:
1343                 return key
1344
1345     def num_accounts(self):
1346         keys = []
1347         for k, v in self.accounts.items():
1348             if type(v) != BIP32_Account:
1349                 continue
1350             keys.append(k)
1351
1352         i = 0
1353         while True:
1354             account_id = self.account_id(i)
1355             if account_id not in keys: break
1356             i += 1
1357         return i
1358
1359     def next_account_address(self, password):
1360         i = self.num_accounts()
1361         account_id = self.account_id(i)
1362
1363         addr = self.next_addresses.get(account_id)
1364         if not addr:
1365             account = self.make_account(account_id, password)
1366             addr = account.first_address()
1367             self.next_addresses[account_id] = addr
1368             self.storage.put('next_addresses', self.next_addresses)
1369
1370         return account_id, addr
1371
1372     def account_id(self, i):
1373         return "m/%d'"%i
1374
1375     def make_account(self, account_id, password):
1376         """Creates and saves the master keys, but does not save the account"""
1377         xpub = self.add_master_keys("m/", account_id, password)
1378         account = BIP32_Account({'xpub':xpub})
1379         return account
1380
1381     def make_seed(self):
1382         import mnemonic, ecdsa
1383         entropy = ecdsa.util.randrange( pow(2,160) )
1384         nonce = 0
1385         while True:
1386             ss = "%040x"%(entropy+nonce)
1387             s = hashlib.sha256(ss.decode('hex')).digest().encode('hex')
1388             # we keep only 13 words, that's approximately 139 bits of entropy
1389             words = mnemonic.mn_encode(s)[0:13]
1390             seed = ' '.join(words)
1391             if is_new_seed(seed):
1392                 break  # this will remove 8 bits of entropy
1393             nonce += 1
1394         return seed
1395
1396     def prepare_seed(self, seed):
1397         import unicodedata
1398         return NEW_SEED_VERSION, unicodedata.normalize('NFC', unicode(seed.strip()))
1399
1400
1401 class Wallet_2of2(NewWallet):
1402     """ This class is used for multisignature addresses"""
1403
1404     def __init__(self, storage):
1405         NewWallet.__init__(self, storage)
1406         self.storage.put('wallet_type', '2of2', True)
1407
1408     def default_account(self):
1409         return self.accounts['m/']
1410
1411     def can_create_accounts(self):
1412         return False
1413
1414     def can_import(self):
1415         return False
1416
1417     def create_account(self, name, password):
1418         xpub1 = self.master_public_keys.get("m/")
1419         xpub2 = self.master_public_keys.get("cold/")
1420         account = BIP32_Account_2of2({'xpub':xpub1, 'xpub2':xpub2})
1421         self.add_account('m/', account)
1422
1423     def get_master_public_keys(self):
1424         xpub1 = self.master_public_keys.get("m/")
1425         xpub2 = self.master_public_keys.get("cold/")
1426         return {'hot':xpub1, 'cold':xpub2}
1427
1428     def get_action(self):
1429         xpub1 = self.master_public_keys.get("m/")
1430         xpub2 = self.master_public_keys.get("cold/")
1431         if xpub1 is None:
1432             return 'create_seed'
1433         if xpub2 is None:
1434             return 'add_cosigner'
1435         if not self.accounts:
1436             return 'create_accounts'
1437
1438
1439 class Wallet_2of3(Wallet_2of2):
1440     """ This class is used for multisignature addresses"""
1441
1442     def __init__(self, storage):
1443         Wallet_2of2.__init__(self, storage)
1444         self.storage.put('wallet_type', '2of3', True)
1445
1446     def create_account(self, name, password):
1447         xpub1 = self.master_public_keys.get("m/")
1448         xpub2 = self.master_public_keys.get("cold/")
1449         xpub3 = self.master_public_keys.get("remote/")
1450         account = BIP32_Account_2of3({'xpub':xpub1, 'xpub2':xpub2, 'xpub3':xpub3})
1451         self.add_account('m/', account)
1452
1453     def get_master_public_keys(self):
1454         xpub1 = self.master_public_keys.get("m/")
1455         xpub2 = self.master_public_keys.get("cold/")
1456         xpub3 = self.master_public_keys.get("remote/")
1457         return {'hot':xpub1, 'cold':xpub2, 'remote':xpub3}
1458
1459     def get_action(self):
1460         xpub1 = self.master_public_keys.get("m/")
1461         xpub2 = self.master_public_keys.get("cold/")
1462         xpub3 = self.master_public_keys.get("remote/")
1463         if xpub1 is None:
1464             return 'create_seed'
1465         if xpub2 is None or xpub3 is None:
1466             return 'add_two_cosigners'
1467         if not self.accounts:
1468             return 'create_accounts'
1469
1470
1471 class OldWallet(Deterministic_Wallet):
1472
1473     def default_account(self):
1474         return self.accounts[0]
1475
1476     def make_seed(self):
1477         import mnemonic
1478         seed = random_seed(128)
1479         return ' '.join(mnemonic.mn_encode(seed))
1480
1481     def prepare_seed(self, seed):
1482         import mnemonic
1483         # see if seed was entered as hex
1484         seed = seed.strip()
1485         try:
1486             assert seed
1487             seed.decode('hex')
1488             return OLD_SEED_VERSION, str(seed)
1489         except Exception:
1490             pass
1491
1492         words = seed.split()
1493         seed = mnemonic.mn_decode(words)
1494         if not seed:
1495             raise Exception("Invalid seed")
1496
1497         return OLD_SEED_VERSION, seed
1498
1499     def create_master_keys(self, password):
1500         seed = self.get_seed(password)
1501         mpk = OldAccount.mpk_from_seed(seed)
1502         self.storage.put('master_public_key', mpk, True)
1503
1504     def get_master_public_key(self):
1505         return self.storage.get("master_public_key")
1506
1507     def get_master_public_keys(self):
1508         return {'Main Account':self.get_master_public_key()}
1509
1510     def create_accounts(self, password):
1511         mpk = self.storage.get("master_public_key")
1512         self.create_account(mpk)
1513
1514     def create_account(self, mpk):
1515         self.accounts[0] = OldAccount({'mpk':mpk, 0:[], 1:[]})
1516         self.save_accounts()
1517
1518     def create_watching_only_wallet(self, mpk):
1519         self.seed_version = OLD_SEED_VERSION
1520         self.storage.put('seed_version', self.seed_version, True)
1521         self.storage.put('master_public_key', mpk, True)
1522         self.create_account(mpk)
1523
1524     def get_seed(self, password):
1525         seed = pw_decode(self.seed, password).encode('utf8')
1526         return seed
1527
1528     def check_password(self, password):
1529         seed = self.get_seed(password)
1530         self.accounts[0].check_seed(seed)
1531
1532     def get_mnemonic(self, password):
1533         import mnemonic
1534         s = self.get_seed(password)
1535         return ' '.join(mnemonic.mn_encode(s))
1536
1537     def check_pending_accounts(self):
1538         pass
1539
1540     def can_sign(self, tx):
1541         if self.is_watching_only():
1542             return False
1543         if tx.is_complete():
1544             return False
1545         addr_list, xpub_list = tx.inputs_to_sign()
1546         for addr in addr_list:
1547             if self.is_mine(addr):
1548                 return True
1549         for xpub, sequence in xpub_list:
1550             if xpub == self.master_public_key:
1551                 return True
1552         return False
1553
1554 # former WalletFactory
1555 class Wallet(object):
1556     """The main wallet "entry point".
1557     This class is actually a factory that will return a wallet of the correct
1558     type when passed a WalletStorage instance."""
1559
1560     def __new__(self, storage):
1561         config = storage.config
1562
1563         self.wallet_types = [
1564             ('standard', ("Standard wallet"),          NewWallet if config.get('bip32') else OldWallet),
1565             ('imported', ("Imported wallet"),          Imported_Wallet),
1566             ('2of2',     ("Multisig wallet (2 of 2)"), Wallet_2of2),
1567             ('2of3',     ("Multisig wallet (2 of 3)"), Wallet_2of3)
1568         ]
1569         run_hook('add_wallet_types', self.wallet_types)
1570
1571         for t, l, WalletClass in self.wallet_types:
1572             if t == storage.get('wallet_type'):
1573                 return WalletClass(storage)
1574
1575         if not storage.file_exists:
1576             seed_version = NEW_SEED_VERSION if config.get('bip32') is True else OLD_SEED_VERSION
1577         else:
1578             seed_version = storage.get('seed_version')
1579             if not seed_version:
1580                 seed_version = OLD_SEED_VERSION if len(storage.get('master_public_key')) == 128 else NEW_SEED_VERSION
1581
1582         if seed_version == OLD_SEED_VERSION:
1583             return OldWallet(storage)
1584         elif seed_version == NEW_SEED_VERSION:
1585             return NewWallet(storage)
1586         else:
1587             msg = "This wallet seed is not supported."
1588             if seed_version in [5]:
1589                 msg += "\nTo open this wallet, try 'git checkout seed_v%d'"%seed_version
1590             print msg
1591             sys.exit(1)
1592
1593     @classmethod
1594     def is_seed(self, seed):
1595         if not seed:
1596             return False
1597         elif is_old_seed(seed):
1598             return True
1599         elif is_new_seed(seed):
1600             return True
1601         else:
1602             return False
1603
1604     @classmethod
1605     def is_old_mpk(self, mpk):
1606         try:
1607             int(mpk, 16)
1608             assert len(mpk) == 128
1609             return True
1610         except:
1611             return False
1612
1613     @classmethod
1614     def is_xpub(self, text):
1615         try:
1616             assert text[0:4] == 'xpub'
1617             deserialize_xkey(text)
1618             return True
1619         except:
1620             return False
1621
1622     @classmethod
1623     def is_xprv(self, text):
1624         try:
1625             assert text[0:4] == 'xprv'
1626             deserialize_xkey(text)
1627             return True
1628         except:
1629             return False
1630
1631     @classmethod
1632     def is_address(self, text):
1633         if not text:
1634             return False
1635         for x in text.split():
1636             if not bitcoin.is_address(x):
1637                 return False
1638         return True
1639
1640     @classmethod
1641     def is_private_key(self, text):
1642         if not text:
1643             return False
1644         for x in text.split():
1645             if not bitcoin.is_private_key(x):
1646                 return False
1647         return True
1648
1649     @classmethod
1650     def from_seed(self, seed, storage):
1651         if is_old_seed(seed):
1652             klass = OldWallet
1653         elif is_new_seed(seed):
1654             klass = NewWallet
1655         w = klass(storage)
1656         return w
1657
1658     @classmethod
1659     def from_address(self, text, storage):
1660         w = Imported_Wallet(storage)
1661         for x in text.split():
1662             w.accounts[IMPORTED_ACCOUNT].add(x, None, None, None)
1663         w.save_accounts()
1664         return w
1665
1666     @classmethod
1667     def from_private_key(self, text, storage):
1668         w = Imported_Wallet(storage)
1669         for x in text.split():
1670             w.import_key(x, None)
1671         return w
1672
1673     @classmethod
1674     def from_old_mpk(self, mpk, storage):
1675         w = OldWallet(storage)
1676         w.seed = ''
1677         w.create_watching_only_wallet(mpk)
1678         return w
1679
1680     @classmethod
1681     def from_xpub(self, xpub, storage):
1682         w = NewWallet(storage)
1683         w.create_watching_only_wallet(xpub)
1684         return w
1685
1686     @classmethod
1687     def from_xprv(self, xprv, password, storage):
1688         w = NewWallet(storage)
1689         w.create_xprv_wallet(xprv, password)
1690         return w