3 # Electrum - lightweight Bitcoin client
4 # Copyright (C) 2011 thomasv@gitorious
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.
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.
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/>.
20 import sys, base64, os, re, hashlib, copy, operator, ast, threading, random, getpass
22 from ecdsa.util import string_to_number, number_to_string
23 from util import print_error
25 ############ functions from pywallet #####################
29 def hash_160(public_key):
31 md = hashlib.new('ripemd160')
32 md.update(hashlib.sha256(public_key).digest())
36 md = ripemd.new(hashlib.sha256(public_key).digest())
40 def public_key_to_bc_address(public_key):
41 h160 = hash_160(public_key)
42 return hash_160_to_bc_address(h160)
44 def hash_160_to_bc_address(h160):
45 vh160 = chr(addrtype) + h160
48 return b58encode(addr)
50 def bc_address_to_hash_160(addr):
51 bytes = b58decode(addr, 25)
54 def encode_point(pubkey, compressed=False):
55 order = generator_secp256k1.order()
56 p = pubkey.pubkey.point
57 x_str = ecdsa.util.number_to_string(p.x(), order)
58 y_str = ecdsa.util.number_to_string(p.y(), order)
60 return chr(2 + (p.y() & 1)) + x_str
62 return chr(4) + pubkey.to_string() #x_str + y_str
64 __b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
65 __b58base = len(__b58chars)
68 """ encode v, which is a string of bytes, to base58.
72 for (i, c) in enumerate(v[::-1]):
73 long_value += (256**i) * ord(c)
76 while long_value >= __b58base:
77 div, mod = divmod(long_value, __b58base)
78 result = __b58chars[mod] + result
80 result = __b58chars[long_value] + result
82 # Bitcoin does a little leading-zero-compression:
83 # leading 0-bytes in the input become leading-1s
86 if c == '\0': nPad += 1
89 return (__b58chars[0]*nPad) + result
91 def b58decode(v, length):
92 """ decode v into a string of len bytes
95 for (i, c) in enumerate(v[::-1]):
96 long_value += __b58chars.find(c) * (__b58base**i)
99 while long_value >= 256:
100 div, mod = divmod(long_value, 256)
101 result = chr(mod) + result
103 result = chr(long_value) + result
107 if c == __b58chars[0]: nPad += 1
110 result = chr(0)*nPad + result
111 if length is not None and len(result) != length:
118 return hashlib.sha256(hashlib.sha256(data).digest()).digest()
120 def EncodeBase58Check(vchIn):
122 return b58encode(vchIn + hash[0:4])
124 def DecodeBase58Check(psz):
125 vchRet = b58decode(psz, None)
135 def PrivKeyToSecret(privkey):
136 return privkey[9:9+32]
138 def SecretToASecret(secret):
139 vchIn = chr(addrtype+128) + secret
140 return EncodeBase58Check(vchIn)
142 def ASecretToSecret(key):
143 vch = DecodeBase58Check(key)
144 if vch and vch[0] == chr(addrtype+128):
149 ########### end pywallet functions #######################
151 # get password routine
152 def prompt_password(prompt, confirm=True):
153 if sys.stdin.isatty():
154 password = getpass.getpass(prompt)
156 if password and confirm:
157 password2 = getpass.getpass("Confirm: ")
159 if password != password2:
160 print_error("Error: Passwords do not match.")
164 password = raw_input(prompt)
172 _ud = re.compile('%([0-9a-hA-H]{2})', re.MULTILINE)
173 urldecode = lambda x: _ud.sub(lambda m: chr(int(m.group(1), 16)), x)
176 def int_to_hex(i, length=1):
177 s = hex(i)[2:].rstrip('L')
178 s = "0"*(2*length - len(s)) + s
179 return s.decode('hex')[::-1].encode('hex')
183 EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
184 DecodeAES = lambda secret, e: aes.decryptData(secret, base64.b64decode(e))
188 # secp256k1, http://www.oid-info.com/get/1.3.132.0.10
189 _p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
190 _r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
191 _b = 0x0000000000000000000000000000000000000000000000000000000000000007L
192 _a = 0x0000000000000000000000000000000000000000000000000000000000000000L
193 _Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
194 _Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L
195 curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b )
196 generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r )
197 oid_secp256k1 = (1,3,132,0,10)
198 SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 )
202 out = re.sub('( [^\n]*|)\n','',s)
203 out = out.replace(' ','')
204 out = out.replace('\n','')
207 def raw_tx( inputs, outputs, for_sig = None ):
208 s = int_to_hex(1,4) + ' version\n'
209 s += int_to_hex( len(inputs) ) + ' number of inputs\n'
210 for i in range(len(inputs)):
211 _, _, p_hash, p_index, p_script, pubkey, sig = inputs[i]
212 s += p_hash.decode('hex')[::-1].encode('hex') + ' prev hash\n'
213 s += int_to_hex(p_index,4) + ' prev index\n'
215 sig = sig + chr(1) # hashtype
216 script = int_to_hex( len(sig)) + ' push %d bytes\n'%len(sig)
217 script += sig.encode('hex') + ' sig\n'
218 pubkey = chr(4) + pubkey
219 script += int_to_hex( len(pubkey)) + ' push %d bytes\n'%len(pubkey)
220 script += pubkey.encode('hex') + ' pubkey\n'
222 script = p_script + ' scriptsig \n'
225 s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
227 s += "ffffffff" + ' sequence\n'
228 s += int_to_hex( len(outputs) ) + ' number of outputs\n'
229 for output in outputs:
230 addr, amount = output
231 s += int_to_hex( amount, 8) + ' amount: %d\n'%amount
232 script = '76a9' # op_dup, op_hash_160
233 script += '14' # push 0x14 bytes
234 script += bc_address_to_hash_160(addr).encode('hex')
235 script += '88ac' # op_equalverify, op_checksig
236 s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
237 s += script + ' script \n'
238 s += int_to_hex(0,4) # lock time
239 if for_sig is not None: s += int_to_hex(1, 4) # hash type
245 def format_satoshis(x, is_diff=False, num_zeros = 0):
246 from decimal import Decimal
248 sign, digits, exp = s.as_tuple()
249 digits = map(str, digits)
250 while len(digits) < 9:
252 digits.insert(-8,'.')
253 s = ''.join(digits).rstrip('0')
260 s += "0"*( 1 + num_zeros - ( len(s) - p ))
261 s += " "*( 9 - ( len(s) - p ))
262 s = " "*( 5 - ( p )) + s
266 from version import ELECTRUM_VERSION, SEED_VERSION
267 from interface import DEFAULT_SERVERS
275 self.electrum_version = ELECTRUM_VERSION
276 self.seed_version = SEED_VERSION
277 self.update_callbacks = []
279 self.gap_limit = 5 # configuration
280 self.use_change = True
283 self.master_public_key = ''
284 self.conversion_currency = None
288 self.use_encryption = False
289 self.addresses = [] # receiving addresses visible for user
290 self.change_addresses = [] # addresses used as change
291 self.seed = '' # encrypted
293 self.labels = {} # labels for addresses and transactions
294 self.aliases = {} # aliases for addresses
295 self.authorities = {} # trusted addresses
296 self.frozen_addresses = []
297 self.prioritized_addresses = []
298 self.expert_mode = False
300 self.receipts = {} # signed URIs
301 self.receipt = None # next receipt
302 self.addressbook = [] # outgoing addresses, for payments
303 self.debug_server = False # write server communication debug info to stdout
308 self.imported_keys = {}
309 self.remote_url = None
311 self.was_updated = True
315 # there is a difference between self.up_to_date and self.is_up_to_date()
316 # self.is_up_to_date() returns true when all requests have been answered and processed
317 # self.up_to_date is true when the wallet is synchronized (stronger requirement)
318 self.up_to_date_event = threading.Event()
319 self.up_to_date_event.clear()
320 self.up_to_date = False
321 self.lock = threading.Lock()
322 self.tx_event = threading.Event()
324 self.pick_random_server()
326 def register_callback(self, update_callback):
328 self.update_callbacks.append(update_callback)
330 def trigger_callbacks(self):
332 callbacks = self.update_callbacks[:]
333 [update() for update in callbacks]
335 def pick_random_server(self):
336 self.server = random.choice( DEFAULT_SERVERS ) # random choice when the wallet is created
338 def is_up_to_date(self):
339 return self.interface.responses.empty() and not self.interface.unanswered_requests
341 def set_server(self, server):
342 # raise an error if the format isnt correct
343 a,b,c = server.split(':')
345 assert c in ['t','h','n']
347 if server != self.server:
350 self.interface.is_connected = False # this exits the polling loop
351 self.interface.poke()
353 def set_path(self, wallet_path):
354 """Set the path of the wallet."""
355 if wallet_path is not None:
356 self.path = wallet_path
358 # backward compatibility: look for wallet file in the default data directory
359 if "HOME" in os.environ:
360 wallet_dir = os.path.join( os.environ["HOME"], '.electrum')
361 elif "LOCALAPPDATA" in os.environ:
362 wallet_dir = os.path.join( os.environ["LOCALAPPDATA"], 'Electrum' )
363 elif "APPDATA" in os.environ:
364 wallet_dir = os.path.join( os.environ["APPDATA"], 'Electrum' )
366 raise BaseException("No home directory found in environment variables.")
368 if not os.path.exists( wallet_dir ): os.mkdir( wallet_dir )
369 self.path = os.path.join( wallet_dir, 'electrum.dat' )
371 def import_key(self, keypair, password):
372 address, key = keypair.split(':')
373 if not self.is_valid(address):
374 raise BaseException('Invalid Bitcoin address')
375 if address in self.all_addresses():
376 raise BaseException('Address already in wallet')
377 b = ASecretToSecret( key )
379 raise BaseException('Unsupported key format')
380 secexp = int( b.encode('hex'), 16)
381 private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve=SECP256k1 )
383 public_key = private_key.get_verifying_key()
384 if not address == public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() ):
385 raise BaseException('Address does not match private key')
386 self.imported_keys[address] = self.pw_encode( key, password )
388 def new_seed(self, password):
389 seed = "%032x"%ecdsa.util.randrange( pow(2,128) )
392 self.seed = self.pw_encode( seed, password )
395 def init_mpk(self,seed):
398 secexp = self.stretch_key(seed)
399 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
400 self.master_public_key = master_private_key.get_verifying_key().to_string()
402 def all_addresses(self):
403 return self.addresses + self.change_addresses + self.imported_keys.keys()
405 def is_mine(self, address):
406 return address in self.all_addresses()
408 def is_change(self, address):
409 return address in self.change_addresses
411 def is_valid(self,addr):
412 ADDRESS_RE = re.compile('[1-9A-HJ-NP-Za-km-z]{26,}\\Z')
413 if not ADDRESS_RE.match(addr): return False
415 h = bc_address_to_hash_160(addr)
418 return addr == hash_160_to_bc_address(h)
420 def stretch_key(self,seed):
422 for i in range(100000):
423 seed = hashlib.sha256(seed + oldseed).digest()
424 return string_to_number( seed )
426 def get_sequence(self,n,for_change):
427 return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.master_public_key ) )
429 def get_private_key_base58(self, address, password):
430 pk = self.get_private_key(address, password)
431 if pk is None: return None
432 return SecretToASecret( pk )
434 def get_private_key(self, address, password):
435 """ Privatekey(type,n) = Master_private_key + H(n|S|type) """
436 order = generator_secp256k1.order()
438 if address in self.imported_keys.keys():
439 b = self.pw_decode( self.imported_keys[address], password )
440 if not b: return None
441 b = ASecretToSecret( b )
442 secexp = int( b.encode('hex'), 16)
444 if address in self.addresses:
445 n = self.addresses.index(address)
447 elif address in self.change_addresses:
448 n = self.change_addresses.index(address)
451 raise BaseException("unknown address")
453 seed = self.pw_decode( self.seed, password)
455 raise BaseException("Invalid password")
456 if not seed: return None
457 secexp = self.stretch_key(seed)
458 secexp = ( secexp + self.get_sequence(n,for_change) ) % order
460 pk = number_to_string(secexp,order)
463 def msg_magic(self, message):
464 return "\x18Bitcoin Signed Message:\n" + chr( len(message) ) + message
466 def sign_message(self, address, message, password):
467 private_key = ecdsa.SigningKey.from_string( self.get_private_key(address, password), curve = SECP256k1 )
468 public_key = private_key.get_verifying_key()
469 signature = private_key.sign_digest( Hash( self.msg_magic( message ) ), sigencode = ecdsa.util.sigencode_string )
470 assert public_key.verify_digest( signature, Hash( self.msg_magic( message ) ), sigdecode = ecdsa.util.sigdecode_string)
472 sig = base64.b64encode( chr(27+i) + signature )
474 self.verify_message( address, sig, message)
479 raise BaseException("error: cannot sign message")
482 def verify_message(self, address, signature, message):
483 """ See http://www.secg.org/download/aid-780/sec1-v2.pdf for the math """
484 from ecdsa import numbertheory, ellipticcurve, util
486 curve = curve_secp256k1
487 G = generator_secp256k1
489 # extract r,s from signature
490 sig = base64.b64decode(signature)
491 if len(sig) != 65: raise BaseException("Wrong encoding")
492 r,s = util.sigdecode_string(sig[1:], order)
494 if nV < 27 or nV >= 35:
495 raise BaseException("Bad encoding")
504 x = r + (recid/2) * order
506 alpha = ( x * x * x + curve.a() * x + curve.b() ) % curve.p()
507 beta = msqr.modular_sqrt(alpha, curve.p())
508 y = beta if (beta - recid) % 2 == 0 else curve.p() - beta
509 # 1.4 the constructor checks that nR is at infinity
510 R = ellipticcurve.Point(curve, x, y, order)
511 # 1.5 compute e from message:
512 h = Hash( self.msg_magic( message ) )
513 e = string_to_number(h)
515 # 1.6 compute Q = r^-1 (sR - eG)
516 inv_r = numbertheory.inverse_mod(r,order)
517 Q = inv_r * ( s * R + minus_e * G )
518 public_key = ecdsa.VerifyingKey.from_public_point( Q, curve = SECP256k1 )
519 # check that Q is the public key
520 public_key.verify_digest( sig[1:], h, sigdecode = ecdsa.util.sigdecode_string)
521 # check that we get the original signing address
522 addr = public_key_to_bc_address( encode_point(public_key, compressed) )
524 raise BaseException("Bad signature")
527 def create_new_address(self, for_change):
528 """ Publickey(type,n) = Master_public_key + H(n|S|type)*point """
530 n = len(self.change_addresses) if for_change else len(self.addresses)
531 z = self.get_sequence(n,for_change)
532 master_public_key = ecdsa.VerifyingKey.from_string( self.master_public_key, curve = SECP256k1 )
533 pubkey_point = master_public_key.pubkey.point + z*curve.generator
534 public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
535 address = public_key_to_bc_address( '04'.decode('hex') + public_key2.to_string() )
537 self.change_addresses.append(address)
539 self.addresses.append(address)
541 self.history[address] = []
546 def change_gap_limit(self, value):
547 if value >= self.gap_limit:
548 self.gap_limit = value
550 self.interface.poke()
553 elif value >= self.min_acceptable_gap():
554 k = self.num_unused_trailing_addresses()
555 n = len(self.addresses) - k + value
556 self.addresses = self.addresses[0:n]
557 self.gap_limit = value
563 def num_unused_trailing_addresses(self):
565 for a in self.addresses[::-1]:
566 if self.history.get(a):break
570 def min_acceptable_gap(self):
571 # fixme: this assumes wallet is synchronized
574 k = self.num_unused_trailing_addresses()
575 for a in self.addresses[0:-k]:
576 if self.history.get(a):
580 if n > nmax: nmax = n
584 def synchronize(self):
585 if not self.master_public_key:
590 if self.change_addresses == []:
591 new_addresses.append( self.create_new_address(True) )
593 a = self.change_addresses[-1]
594 if self.history.get(a):
595 new_addresses.append( self.create_new_address(True) )
601 if len(self.addresses) < n:
602 new_addresses.append( self.create_new_address(False) )
604 if map( lambda a: self.history.get(a), self.addresses[-n:] ) == n*[[]]:
607 new_addresses.append( self.create_new_address(False) )
610 num = self.get_remote_number()
611 while len(self.addresses)<num:
612 new_addresses.append( self.create_new_address(False) )
617 def get_remote_number(self):
619 server = jsonrpclib.Server(self.remote_url)
620 out = server.getnum()
623 def get_remote_mpk(self):
625 server = jsonrpclib.Server(self.remote_url)
626 out = server.getkey()
630 return (len(self.change_addresses) > 1 ) or ( len(self.addresses) > self.gap_limit )
632 def fill_addressbook(self):
633 for tx in self.tx_history.values():
635 for i in tx['outputs']:
636 if not self.is_mine(i) and i not in self.addressbook:
637 self.addressbook.append(i)
639 self.update_tx_labels()
643 # TODO: Need special config storage class. Should not be mixed
644 # up with the wallet.
645 # Settings should maybe be stored in a flat ini file.
647 'seed_version': self.seed_version,
648 'use_encryption': self.use_encryption,
649 'use_change': self.use_change,
650 'master_public_key': self.master_public_key.encode('hex'),
652 'server': self.server,
654 'addresses': self.addresses,
655 'change_addresses': self.change_addresses,
656 'history': self.history,
657 'labels': self.labels,
658 'contacts': self.addressbook,
659 'imported_keys': self.imported_keys,
660 'aliases': self.aliases,
661 'authorities': self.authorities,
662 'receipts': self.receipts,
663 'num_zeros': self.num_zeros,
664 'frozen_addresses': self.frozen_addresses,
665 'prioritized_addresses': self.prioritized_addresses,
666 'expert_mode': self.expert_mode,
667 'gap_limit': self.gap_limit,
668 'debug_server': self.debug_server,
669 'conversion_currency': self.conversion_currency,
672 f = open(self.path,"w")
676 os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE)
679 '''Read the contents of the wallet file.'''
682 upgrade_msg = """This wallet seed is deprecated. Please run upgrade.py for a diagnostic."""
683 self.file_exists = False
685 f = open(self.path,"r")
691 d = ast.literal_eval( data ) #parse raw data from reading wallet file
692 interface.old_to_new(d)
693 self.seed_version = d.get('seed_version')
694 self.master_public_key = d.get('master_public_key').decode('hex')
695 self.use_encryption = d.get('use_encryption')
696 self.use_change = bool(d.get('use_change', True))
697 self.fee = int(d.get('fee'))
698 self.seed = d.get('seed')
699 self.server = d.get('server')
700 self.addresses = d.get('addresses')
701 self.change_addresses = d.get('change_addresses')
702 self.history = d.get('history')
703 self.labels = d.get('labels')
704 self.addressbook = d.get('contacts')
705 self.imported_keys = d.get('imported_keys', {})
706 self.aliases = d.get('aliases', {})
707 self.authorities = d.get('authorities', {})
708 self.receipts = d.get('receipts', {})
709 self.num_zeros = d.get('num_zeros', 0)
710 self.frozen_addresses = d.get('frozen_addresses', [])
711 self.prioritized_addresses = d.get('prioritized_addresses', [])
712 self.expert_mode = d.get('expert_mode', False)
713 self.gap_limit = d.get('gap_limit', 5)
714 self.debug_server = d.get('debug_server', False)
715 self.conversion_currency = d.get('conversion_currency', 'USD')
716 self.theme = d.get('theme', 'Cleanlook')
718 raise BaseException("cannot read wallet file")
720 self.update_tx_history()
722 if self.seed_version != SEED_VERSION:
723 raise BaseException(upgrade_msg)
725 if self.remote_url: assert self.master_public_key.encode('hex') == self.get_remote_mpk()
727 self.file_exists = True
730 def get_address_flags(self, addr):
731 flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-"
732 flags += "F" if addr in self.frozen_addresses else "P" if addr in self.prioritized_addresses else "-"
736 def get_addr_balance(self, addr):
737 assert self.is_mine(addr)
738 h = self.history.get(addr,[])
748 def get_balance(self):
750 for addr in self.all_addresses():
751 c, u = self.get_addr_balance(addr)
757 def choose_tx_inputs( self, amount, fixed_fee, from_addr = None ):
758 """ todo: minimize tx size """
760 fee = self.fee if fixed_fee is None else fixed_fee
763 prioritized_coins = []
764 domain = [from_addr] if from_addr else self.all_addresses()
765 for i in self.frozen_addresses:
766 if i in domain: domain.remove(i)
768 for i in self.prioritized_addresses:
769 if i in domain: domain.remove(i)
772 h = self.history.get(addr)
773 if h is None: continue
775 if item.get('raw_output_script'):
776 coins.append( (addr,item))
778 coins = sorted( coins, key = lambda x: x[1]['timestamp'] )
780 for addr in self.prioritized_addresses:
781 h = self.history.get(addr)
782 if h is None: continue
784 if item.get('raw_output_script'):
785 prioritized_coins.append( (addr,item))
787 prioritized_coins = sorted( prioritized_coins, key = lambda x: x[1]['timestamp'] )
790 coins = prioritized_coins + coins
794 v = item.get('value')
796 inputs.append((addr, v, item['tx_hash'], item['index'], item['raw_output_script'], None, None) )
797 fee = self.fee*len(inputs) if fixed_fee is None else fixed_fee
798 if total >= amount + fee: break
800 #print "not enough funds: %s %s"%(format_satoshis(total), format_satoshis(fee))
802 return inputs, total, fee
804 def choose_tx_outputs( self, to_addr, amount, fee, total, change_addr=None ):
805 outputs = [ (to_addr, amount) ]
806 change_amount = total - ( amount + fee )
807 if change_amount != 0:
808 # normally, the update thread should ensure that the last change address is unused
810 change_addr = self.change_addresses[-1]
811 outputs.append( ( change_addr, change_amount) )
814 def sign_inputs( self, inputs, outputs, password ):
816 for i in range(len(inputs)):
817 addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i]
818 private_key = ecdsa.SigningKey.from_string( self.get_private_key(addr, password), curve = SECP256k1 )
819 public_key = private_key.get_verifying_key()
820 pubkey = public_key.to_string()
821 tx = filter( raw_tx( inputs, outputs, for_sig = i ) )
822 sig = private_key.sign_digest( Hash( tx.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
823 assert public_key.verify_digest( sig, Hash( tx.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
824 s_inputs.append( (addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig) )
827 def pw_encode(self, s, password):
829 secret = Hash(password)
830 return EncodeAES(secret, s)
834 def pw_decode(self, s, password):
835 if password is not None:
836 secret = Hash(password)
837 d = DecodeAES(secret, s)
842 raise BaseException("Invalid password")
847 def get_status(self, address):
848 h = self.history.get(address)
853 status = lastpoint['block_hash']
854 if status == 'mempool':
855 status = status + ':%d'% len(h)
858 def receive_status_callback(self, addr, status):
860 if self.get_status(addr) != status:
861 #print "updating status for", addr, status
862 self.interface.get_history(addr)
864 def receive_history_callback(self, addr, data):
865 #print "updating history for", addr
867 self.history[addr] = data
868 self.update_tx_history()
871 def get_tx_history(self):
872 lines = self.tx_history.values()
873 lines = sorted(lines, key=operator.itemgetter("timestamp"))
876 def update_tx_history(self):
878 for addr in self.all_addresses():
879 h = self.history.get(addr)
880 if h is None: continue
882 tx_hash = tx['tx_hash']
883 line = self.tx_history.get(tx_hash)
885 self.tx_history[tx_hash] = copy.copy(tx)
886 line = self.tx_history.get(tx_hash)
888 line['value'] += tx['value']
889 if line['height'] == 0:
890 line['timestamp'] = 1e12
891 self.update_tx_labels()
893 def update_tx_labels(self):
894 for tx in self.tx_history.values():
897 for o_addr in tx['outputs']:
898 if not self.is_mine(o_addr):
900 default_label = self.labels[o_addr]
902 default_label = o_addr
904 for o_addr in tx['outputs']:
905 if self.is_mine(o_addr) and not self.is_change(o_addr):
908 for o_addr in tx['outputs']:
909 if self.is_mine(o_addr):
915 dest_label = self.labels.get(o_addr)
917 default_label = self.labels[o_addr]
919 default_label = o_addr
921 tx['default_label'] = default_label
923 def mktx(self, to_address, amount, label, password, fee=None, change_addr=None, from_addr= None):
924 if not self.is_valid(to_address):
925 raise BaseException("Invalid address")
926 inputs, total, fee = self.choose_tx_inputs( amount, fee, from_addr )
928 raise BaseException("Not enough funds")
930 if not self.use_change and not change_addr:
931 change_addr = inputs[0][0]
932 print "Sending change to", change_addr
934 outputs = self.choose_tx_outputs( to_address, amount, fee, total, change_addr )
935 s_inputs = self.sign_inputs( inputs, outputs, password )
937 tx = filter( raw_tx( s_inputs, outputs ) )
938 if to_address not in self.addressbook:
939 self.addressbook.append(to_address)
941 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
942 self.labels[tx_hash] = label
946 def sendtx(self, tx):
947 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
948 self.tx_event.clear()
949 self.interface.send([('blockchain.transaction.broadcast', [tx])])
953 return False, "error: " + out
955 self.receipts[tx_hash] = self.receipt
960 def read_alias(self, alias):
961 # this might not be the right place for this function.
964 m1 = re.match('([\w\-\.]+)@((\w[\w\-]+\.)+[\w\-]+)', alias)
965 m2 = re.match('((\w[\w\-]+\.)+[\w\-]+)', alias)
967 url = 'http://' + m1.group(2) + '/bitcoin.id/' + m1.group(1)
969 url = 'http://' + alias + '/bitcoin.id'
973 lines = urllib.urlopen(url).readlines()
978 line = lines[0].strip().split(':')
981 target = signing_addr = line[0]
983 target, auth_name, signing_addr, signature = line
984 msg = "alias:%s:%s:%s"%(alias,target,auth_name)
986 self.verify_message(signing_addr, signature, msg)
988 # other lines are signed updates
989 for line in lines[1:]:
991 if not line: continue
992 line = line.split(':')
995 target, signature = line
996 self.verify_message(previous, signature, "alias:%s:%s"%(alias,target))
998 if not self.is_valid(target):
999 raise BaseException("Invalid bitcoin address")
1001 return target, signing_addr, auth_name
1003 def update_password(self, seed, old_password, new_password):
1004 if new_password == '': new_password = None
1005 self.use_encryption = (new_password != None)
1006 self.seed = self.pw_encode( seed, new_password)
1007 for k in self.imported_keys.keys():
1008 a = self.imported_keys[k]
1009 b = self.pw_decode(a, old_password)
1010 c = self.pw_encode(b, new_password)
1011 self.imported_keys[k] = c
1014 def get_alias(self, alias, interactive = False, show_message=None, question = None):
1016 target, signing_address, auth_name = self.read_alias(alias)
1017 except BaseException, e:
1018 # raise exception if verify fails (verify the chain)
1020 show_message("Alias error: " + str(e))
1023 print target, signing_address, auth_name
1025 if auth_name is None:
1026 a = self.aliases.get(alias)
1028 msg = "Warning: the alias '%s' is self-signed.\nThe signing address is %s.\n\nDo you want to add this alias to your list of contacts?"%(alias,signing_address)
1029 if interactive and question( msg ):
1030 self.aliases[alias] = (signing_address, target)
1034 if signing_address != a[0]:
1035 msg = "Warning: the key of alias '%s' has changed since your last visit! It is possible that someone is trying to do something nasty!!!\nDo you accept to change your trusted key?"%alias
1036 if interactive and question( msg ):
1037 self.aliases[alias] = (signing_address, target)
1041 if signing_address not in self.authorities.keys():
1042 msg = "The alias: '%s' links to %s\n\nWarning: this alias was signed by an unknown key.\nSigning authority: %s\nSigning address: %s\n\nDo you want to add this key to your list of trusted keys?"%(alias,target,auth_name,signing_address)
1043 if interactive and question( msg ):
1044 self.authorities[signing_address] = auth_name
1049 self.aliases[alias] = (signing_address, target)
1054 def parse_url(self, url, show_message, question):
1055 o = url[8:].split('?')
1058 params = o[1].split('&')
1062 amount = label = message = signature = identity = ''
1066 if k == 'amount': amount = uv
1067 elif k == 'message': message = uv
1068 elif k == 'label': label = uv
1069 elif k == 'signature':
1070 identity, signature = uv.split(':')
1071 url = url.replace('&%s=%s'%(k,v),'')
1075 if label and self.labels.get(address) != label:
1076 if question('Give label "%s" to address %s ?'%(label,address)):
1077 if address not in self.addressbook and address not in self.all_addresses():
1078 self.addressbook.append(address)
1079 self.labels[address] = label
1082 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', identity):
1083 signing_address = self.get_alias(identity, True, show_message, question)
1084 elif self.is_valid(identity):
1085 signing_address = identity
1087 signing_address = None
1088 if not signing_address:
1091 self.verify_message(signing_address, signature, url )
1092 self.receipt = (signing_address, signature, url)
1094 show_message('Warning: the URI contains a bad signature.\nThe identity of the recipient cannot be verified.')
1095 address = amount = label = identity = message = ''
1097 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', address):
1098 payto_address = self.get_alias(address, True, show_message, question)
1100 address = address + ' <' + payto_address + '>'
1102 return address, amount, label, message, signature, identity, url
1106 self.interface.poke()
1107 self.up_to_date_event.wait(10000000000)
1110 def start_session(self, interface):
1111 self.interface = interface
1112 self.interface.send([('server.banner',[]), ('blockchain.numblocks.subscribe',[]), ('server.peers.subscribe',[])])
1113 self.interface.subscribe(self.all_addresses())
1116 def freeze(self,addr):
1117 if addr in self.all_addresses() and addr not in self.frozen_addresses:
1118 self.unprioritize(addr)
1119 self.frozen_addresses.append(addr)
1125 def unfreeze(self,addr):
1126 if addr in self.all_addresses() and addr in self.frozen_addresses:
1127 self.frozen_addresses.remove(addr)
1133 def prioritize(self,addr):
1134 if addr in self.all_addresses() and addr not in self.prioritized_addresses:
1136 self.prioritized_addresses.append(addr)
1142 def unprioritize(self,addr):
1143 if addr in self.all_addresses() and addr in self.prioritized_addresses:
1144 self.prioritized_addresses.remove(addr)